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mac80211: fix association with some APs
[linux-2.6/sactl.git] / net / mac80211 / mlme.c
blob4adba09e80ca8d23fe8c3b15112ca7e183a86d75
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 /* TODO:
15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <linux/rtnetlink.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
30
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
33 #include "rate.h"
34 #include "led.h"
35 #include "mesh.h"
36
37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_MAX_TRIES 3
41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49 #define IEEE80211_PROBE_DELAY (HZ / 33)
50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
56
57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
60 #define ERP_INFO_USE_PROTECTION BIT(1)
61
62 /* mgmt header + 1 byte action code */
63 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
64
65 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
66 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
67 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
68 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
69 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
70
71 /* next values represent the buffer size for A-MPDU frame.
72 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
73 #define IEEE80211_MIN_AMPDU_BUF 0x8
74 #define IEEE80211_MAX_AMPDU_BUF 0x40
75
76 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
77 u8 *ssid, size_t ssid_len);
78 static struct ieee80211_sta_bss *
79 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
80 u8 *ssid, u8 ssid_len);
81 static void ieee80211_rx_bss_put(struct net_device *dev,
82 struct ieee80211_sta_bss *bss);
83 static int ieee80211_sta_find_ibss(struct net_device *dev,
84 struct ieee80211_if_sta *ifsta);
85 static int ieee80211_sta_wep_configured(struct net_device *dev);
86 static int ieee80211_sta_start_scan(struct net_device *dev,
87 u8 *ssid, size_t ssid_len);
88 static int ieee80211_sta_config_auth(struct net_device *dev,
89 struct ieee80211_if_sta *ifsta);
90
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 static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
354 bool use_protection,
355 bool use_short_preamble)
356 {
357 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
358 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
359 DECLARE_MAC_BUF(mac);
360 u32 changed = 0;
361
362 if (use_protection != bss_conf->use_cts_prot) {
363 if (net_ratelimit()) {
364 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
365 "%s)\n",
366 sdata->dev->name,
367 use_protection ? "enabled" : "disabled",
368 print_mac(mac, ifsta->bssid));
369 }
370 bss_conf->use_cts_prot = use_protection;
371 changed |= BSS_CHANGED_ERP_CTS_PROT;
372 }
373
374 if (use_short_preamble != bss_conf->use_short_preamble) {
375 if (net_ratelimit()) {
376 printk(KERN_DEBUG "%s: switched to %s barker preamble"
377 " (BSSID=%s)\n",
378 sdata->dev->name,
379 use_short_preamble ? "short" : "long",
380 print_mac(mac, ifsta->bssid));
381 }
382 bss_conf->use_short_preamble = use_short_preamble;
383 changed |= BSS_CHANGED_ERP_PREAMBLE;
384 }
385
386 return changed;
387 }
388
389 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
390 u8 erp_value)
391 {
392 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
393 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
394
395 return ieee80211_handle_protect_preamb(sdata,
396 use_protection, use_short_preamble);
397 }
398
399 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
400 struct ieee80211_sta_bss *bss)
401 {
402 u32 changed = 0;
403
404 if (bss->has_erp_value)
405 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
406 else {
407 u16 capab = bss->capability;
408 changed |= ieee80211_handle_protect_preamb(sdata, false,
409 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
410 }
411
412 return changed;
413 }
414
415 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
416 struct ieee80211_ht_info *ht_info)
417 {
418
419 if (ht_info == NULL)
420 return -EINVAL;
421
422 memset(ht_info, 0, sizeof(*ht_info));
423
424 if (ht_cap_ie) {
425 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
426
427 ht_info->ht_supported = 1;
428 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
429 ht_info->ampdu_factor =
430 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
431 ht_info->ampdu_density =
432 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
433 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
434 } else
435 ht_info->ht_supported = 0;
436
437 return 0;
438 }
439
440 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
441 struct ieee80211_ht_addt_info *ht_add_info_ie,
442 struct ieee80211_ht_bss_info *bss_info)
443 {
444 if (bss_info == NULL)
445 return -EINVAL;
446
447 memset(bss_info, 0, sizeof(*bss_info));
448
449 if (ht_add_info_ie) {
450 u16 op_mode;
451 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
452
453 bss_info->primary_channel = ht_add_info_ie->control_chan;
454 bss_info->bss_cap = ht_add_info_ie->ht_param;
455 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
456 }
457
458 return 0;
459 }
460
461 static void ieee80211_sta_send_associnfo(struct net_device *dev,
462 struct ieee80211_if_sta *ifsta)
463 {
464 char *buf;
465 size_t len;
466 int i;
467 union iwreq_data wrqu;
468
469 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
470 return;
471
472 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
473 ifsta->assocresp_ies_len), GFP_KERNEL);
474 if (!buf)
475 return;
476
477 len = sprintf(buf, "ASSOCINFO(");
478 if (ifsta->assocreq_ies) {
479 len += sprintf(buf + len, "ReqIEs=");
480 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
481 len += sprintf(buf + len, "%02x",
482 ifsta->assocreq_ies[i]);
483 }
484 }
485 if (ifsta->assocresp_ies) {
486 if (ifsta->assocreq_ies)
487 len += sprintf(buf + len, " ");
488 len += sprintf(buf + len, "RespIEs=");
489 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
490 len += sprintf(buf + len, "%02x",
491 ifsta->assocresp_ies[i]);
492 }
493 }
494 len += sprintf(buf + len, ")");
495
496 if (len > IW_CUSTOM_MAX) {
497 len = sprintf(buf, "ASSOCRESPIE=");
498 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
499 len += sprintf(buf + len, "%02x",
500 ifsta->assocresp_ies[i]);
501 }
502 }
503
504 memset(&wrqu, 0, sizeof(wrqu));
505 wrqu.data.length = len;
506 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
507
508 kfree(buf);
509 }
510
511
512 static void ieee80211_set_associated(struct net_device *dev,
513 struct ieee80211_if_sta *ifsta,
514 bool assoc)
515 {
516 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
517 struct ieee80211_local *local = sdata->local;
518 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
519 union iwreq_data wrqu;
520 u32 changed = BSS_CHANGED_ASSOC;
521
522 if (assoc) {
523 struct ieee80211_sta_bss *bss;
524
525 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
526
527 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
528 return;
529
530 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
531 conf->channel->center_freq,
532 ifsta->ssid, ifsta->ssid_len);
533 if (bss) {
534 /* set timing information */
535 sdata->bss_conf.beacon_int = bss->beacon_int;
536 sdata->bss_conf.timestamp = bss->timestamp;
537
538 changed |= ieee80211_handle_bss_capability(sdata, bss);
539
540 ieee80211_rx_bss_put(dev, bss);
541 }
542
543 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
544 changed |= BSS_CHANGED_HT;
545 sdata->bss_conf.assoc_ht = 1;
546 sdata->bss_conf.ht_conf = &conf->ht_conf;
547 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
548 }
549
550 netif_carrier_on(dev);
551 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
552 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
553 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
554 ieee80211_sta_send_associnfo(dev, ifsta);
555 } else {
556 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
557 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
558 netif_carrier_off(dev);
559 ieee80211_reset_erp_info(dev);
560
561 sdata->bss_conf.assoc_ht = 0;
562 sdata->bss_conf.ht_conf = NULL;
563 sdata->bss_conf.ht_bss_conf = NULL;
564
565 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
566 }
567 ifsta->last_probe = jiffies;
568 ieee80211_led_assoc(local, assoc);
569
570 sdata->bss_conf.assoc = assoc;
571 ieee80211_bss_info_change_notify(sdata, changed);
572 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
573 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
574 }
575
576 static void ieee80211_set_disassoc(struct net_device *dev,
577 struct ieee80211_if_sta *ifsta, int deauth)
578 {
579 if (deauth)
580 ifsta->auth_tries = 0;
581 ifsta->assoc_tries = 0;
582 ieee80211_set_associated(dev, ifsta, 0);
583 }
584
585 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
586 int encrypt)
587 {
588 struct ieee80211_sub_if_data *sdata;
589 struct ieee80211_tx_packet_data *pkt_data;
590
591 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
592 skb->dev = sdata->local->mdev;
593 skb_set_mac_header(skb, 0);
594 skb_set_network_header(skb, 0);
595 skb_set_transport_header(skb, 0);
596
597 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
598 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
599 pkt_data->ifindex = sdata->dev->ifindex;
600 if (!encrypt)
601 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
602
603 dev_queue_xmit(skb);
604 }
605
606
607 static void ieee80211_send_auth(struct net_device *dev,
608 struct ieee80211_if_sta *ifsta,
609 int transaction, u8 *extra, size_t extra_len,
610 int encrypt)
611 {
612 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
613 struct sk_buff *skb;
614 struct ieee80211_mgmt *mgmt;
615
616 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
617 sizeof(*mgmt) + 6 + extra_len);
618 if (!skb) {
619 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
620 "frame\n", dev->name);
621 return;
622 }
623 skb_reserve(skb, local->hw.extra_tx_headroom);
624
625 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
626 memset(mgmt, 0, 24 + 6);
627 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
628 IEEE80211_STYPE_AUTH);
629 if (encrypt)
630 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
631 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
632 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
633 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
634 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
635 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
636 ifsta->auth_transaction = transaction + 1;
637 mgmt->u.auth.status_code = cpu_to_le16(0);
638 if (extra)
639 memcpy(skb_put(skb, extra_len), extra, extra_len);
640
641 ieee80211_sta_tx(dev, skb, encrypt);
642 }
643
644
645 static void ieee80211_authenticate(struct net_device *dev,
646 struct ieee80211_if_sta *ifsta)
647 {
648 DECLARE_MAC_BUF(mac);
649
650 ifsta->auth_tries++;
651 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
652 printk(KERN_DEBUG "%s: authentication with AP %s"
653 " timed out\n",
654 dev->name, print_mac(mac, ifsta->bssid));
655 ifsta->state = IEEE80211_DISABLED;
656 return;
657 }
658
659 ifsta->state = IEEE80211_AUTHENTICATE;
660 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
661 dev->name, print_mac(mac, ifsta->bssid));
662
663 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
664
665 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
666 }
667
668 static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
669 struct ieee80211_supported_band *sband,
670 u64 *rates)
671 {
672 int i, j, count;
673 *rates = 0;
674 count = 0;
675 for (i = 0; i < bss->supp_rates_len; i++) {
676 int rate = (bss->supp_rates[i] & 0x7F) * 5;
677
678 for (j = 0; j < sband->n_bitrates; j++)
679 if (sband->bitrates[j].bitrate == rate) {
680 *rates |= BIT(j);
681 count++;
682 break;
683 }
684 }
685
686 return count;
687 }
688
689 static void ieee80211_send_assoc(struct net_device *dev,
690 struct ieee80211_if_sta *ifsta)
691 {
692 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
693 struct sk_buff *skb;
694 struct ieee80211_mgmt *mgmt;
695 u8 *pos, *ies;
696 int i, len, count, rates_len, supp_rates_len;
697 u16 capab;
698 struct ieee80211_sta_bss *bss;
699 int wmm = 0;
700 struct ieee80211_supported_band *sband;
701 u64 rates = 0;
702
703 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
704 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
705 ifsta->ssid_len);
706 if (!skb) {
707 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
708 "frame\n", dev->name);
709 return;
710 }
711 skb_reserve(skb, local->hw.extra_tx_headroom);
712
713 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
714
715 capab = ifsta->capab;
716
717 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
718 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
719 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
720 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
721 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
722 }
723
724 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
725 local->hw.conf.channel->center_freq,
726 ifsta->ssid, ifsta->ssid_len);
727 if (bss) {
728 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
729 capab |= WLAN_CAPABILITY_PRIVACY;
730 if (bss->wmm_ie) {
731 wmm = 1;
732 }
733 ieee80211_rx_bss_put(dev, bss);
734 }
735
736 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
737 memset(mgmt, 0, 24);
738 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
739 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
740 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
741
742 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
743 skb_put(skb, 10);
744 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
745 IEEE80211_STYPE_REASSOC_REQ);
746 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
747 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
748 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
749 ETH_ALEN);
750 } else {
751 skb_put(skb, 4);
752 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
753 IEEE80211_STYPE_ASSOC_REQ);
754 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
755 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
756 }
757
758 /* SSID */
759 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
760 *pos++ = WLAN_EID_SSID;
761 *pos++ = ifsta->ssid_len;
762 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
763
764 /* all supported rates should be added here but some APs
765 * (e.g. D-Link DAP 1353 in b-only mode) don't like that
766 * Therefore only add rates the AP supports */
767 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
768 supp_rates_len = rates_len;
769 if (supp_rates_len > 8)
770 supp_rates_len = 8;
771
772 len = sband->n_bitrates;
773 pos = skb_put(skb, supp_rates_len + 2);
774 *pos++ = WLAN_EID_SUPP_RATES;
775 *pos++ = supp_rates_len;
776
777 count = 0;
778 for (i = 0; i < sband->n_bitrates; i++) {
779 if (BIT(i) & rates) {
780 int rate = sband->bitrates[i].bitrate;
781 *pos++ = (u8) (rate / 5);
782 if (++count == 8)
783 break;
784 }
785 }
786
787 if (count == 8) {
788 pos = skb_put(skb, rates_len - count + 2);
789 *pos++ = WLAN_EID_EXT_SUPP_RATES;
790 *pos++ = rates_len - count;
791
792 for (i++; i < sband->n_bitrates; i++) {
793 if (BIT(i) & rates) {
794 int rate = sband->bitrates[i].bitrate;
795 *pos++ = (u8) (rate / 5);
796 }
797 }
798 }
799
800 if (ifsta->extra_ie) {
801 pos = skb_put(skb, ifsta->extra_ie_len);
802 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
803 }
804
805 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
806 pos = skb_put(skb, 9);
807 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
808 *pos++ = 7; /* len */
809 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
810 *pos++ = 0x50;
811 *pos++ = 0xf2;
812 *pos++ = 2; /* WME */
813 *pos++ = 0; /* WME info */
814 *pos++ = 1; /* WME ver */
815 *pos++ = 0;
816 }
817 /* wmm support is a must to HT */
818 if (wmm && sband->ht_info.ht_supported) {
819 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
820 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
821 *pos++ = WLAN_EID_HT_CAPABILITY;
822 *pos++ = sizeof(struct ieee80211_ht_cap);
823 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
824 memcpy(pos, &tmp, sizeof(u16));
825 pos += sizeof(u16);
826 /* TODO: needs a define here for << 2 */
827 *pos++ = sband->ht_info.ampdu_factor |
828 (sband->ht_info.ampdu_density << 2);
829 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
830 }
831
832 kfree(ifsta->assocreq_ies);
833 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
834 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
835 if (ifsta->assocreq_ies)
836 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
837
838 ieee80211_sta_tx(dev, skb, 0);
839 }
840
841
842 static void ieee80211_send_deauth(struct net_device *dev,
843 struct ieee80211_if_sta *ifsta, u16 reason)
844 {
845 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
846 struct sk_buff *skb;
847 struct ieee80211_mgmt *mgmt;
848
849 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
850 if (!skb) {
851 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
852 "frame\n", dev->name);
853 return;
854 }
855 skb_reserve(skb, local->hw.extra_tx_headroom);
856
857 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
858 memset(mgmt, 0, 24);
859 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
860 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
861 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
862 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
863 IEEE80211_STYPE_DEAUTH);
864 skb_put(skb, 2);
865 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
866
867 ieee80211_sta_tx(dev, skb, 0);
868 }
869
870
871 static void ieee80211_send_disassoc(struct net_device *dev,
872 struct ieee80211_if_sta *ifsta, u16 reason)
873 {
874 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
875 struct sk_buff *skb;
876 struct ieee80211_mgmt *mgmt;
877
878 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
879 if (!skb) {
880 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
881 "frame\n", dev->name);
882 return;
883 }
884 skb_reserve(skb, local->hw.extra_tx_headroom);
885
886 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
887 memset(mgmt, 0, 24);
888 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
889 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
890 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
891 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
892 IEEE80211_STYPE_DISASSOC);
893 skb_put(skb, 2);
894 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
895
896 ieee80211_sta_tx(dev, skb, 0);
897 }
898
899
900 static int ieee80211_privacy_mismatch(struct net_device *dev,
901 struct ieee80211_if_sta *ifsta)
902 {
903 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
904 struct ieee80211_sta_bss *bss;
905 int bss_privacy;
906 int wep_privacy;
907 int privacy_invoked;
908
909 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
910 return 0;
911
912 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
913 local->hw.conf.channel->center_freq,
914 ifsta->ssid, ifsta->ssid_len);
915 if (!bss)
916 return 0;
917
918 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
919 wep_privacy = !!ieee80211_sta_wep_configured(dev);
920 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
921
922 ieee80211_rx_bss_put(dev, bss);
923
924 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
925 return 0;
926
927 return 1;
928 }
929
930
931 static void ieee80211_associate(struct net_device *dev,
932 struct ieee80211_if_sta *ifsta)
933 {
934 DECLARE_MAC_BUF(mac);
935
936 ifsta->assoc_tries++;
937 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
938 printk(KERN_DEBUG "%s: association with AP %s"
939 " timed out\n",
940 dev->name, print_mac(mac, ifsta->bssid));
941 ifsta->state = IEEE80211_DISABLED;
942 return;
943 }
944
945 ifsta->state = IEEE80211_ASSOCIATE;
946 printk(KERN_DEBUG "%s: associate with AP %s\n",
947 dev->name, print_mac(mac, ifsta->bssid));
948 if (ieee80211_privacy_mismatch(dev, ifsta)) {
949 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
950 "mixed-cell disabled - abort association\n", dev->name);
951 ifsta->state = IEEE80211_DISABLED;
952 return;
953 }
954
955 ieee80211_send_assoc(dev, ifsta);
956
957 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
958 }
959
960
961 static void ieee80211_associated(struct net_device *dev,
962 struct ieee80211_if_sta *ifsta)
963 {
964 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
965 struct sta_info *sta;
966 int disassoc;
967 DECLARE_MAC_BUF(mac);
968
969 /* TODO: start monitoring current AP signal quality and number of
970 * missed beacons. Scan other channels every now and then and search
971 * for better APs. */
972 /* TODO: remove expired BSSes */
973
974 ifsta->state = IEEE80211_ASSOCIATED;
975
976 rcu_read_lock();
977
978 sta = sta_info_get(local, ifsta->bssid);
979 if (!sta) {
980 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
981 dev->name, print_mac(mac, ifsta->bssid));
982 disassoc = 1;
983 } else {
984 disassoc = 0;
985 if (time_after(jiffies,
986 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
987 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
988 printk(KERN_DEBUG "%s: No ProbeResp from "
989 "current AP %s - assume out of "
990 "range\n",
991 dev->name, print_mac(mac, ifsta->bssid));
992 disassoc = 1;
993 sta_info_unlink(&sta);
994 } else
995 ieee80211_send_probe_req(dev, ifsta->bssid,
996 local->scan_ssid,
997 local->scan_ssid_len);
998 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
999 } else {
1000 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1001 if (time_after(jiffies, ifsta->last_probe +
1002 IEEE80211_PROBE_INTERVAL)) {
1003 ifsta->last_probe = jiffies;
1004 ieee80211_send_probe_req(dev, ifsta->bssid,
1005 ifsta->ssid,
1006 ifsta->ssid_len);
1007 }
1008 }
1009 }
1010
1011 rcu_read_unlock();
1012
1013 if (disassoc && sta)
1014 sta_info_destroy(sta);
1015
1016 if (disassoc) {
1017 ifsta->state = IEEE80211_DISABLED;
1018 ieee80211_set_associated(dev, ifsta, 0);
1019 } else {
1020 mod_timer(&ifsta->timer, jiffies +
1021 IEEE80211_MONITORING_INTERVAL);
1022 }
1023 }
1024
1025
1026 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1027 u8 *ssid, size_t ssid_len)
1028 {
1029 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1030 struct ieee80211_supported_band *sband;
1031 struct sk_buff *skb;
1032 struct ieee80211_mgmt *mgmt;
1033 u8 *pos, *supp_rates, *esupp_rates = NULL;
1034 int i;
1035
1036 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1037 if (!skb) {
1038 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1039 "request\n", dev->name);
1040 return;
1041 }
1042 skb_reserve(skb, local->hw.extra_tx_headroom);
1043
1044 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1045 memset(mgmt, 0, 24);
1046 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1047 IEEE80211_STYPE_PROBE_REQ);
1048 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1049 if (dst) {
1050 memcpy(mgmt->da, dst, ETH_ALEN);
1051 memcpy(mgmt->bssid, dst, ETH_ALEN);
1052 } else {
1053 memset(mgmt->da, 0xff, ETH_ALEN);
1054 memset(mgmt->bssid, 0xff, ETH_ALEN);
1055 }
1056 pos = skb_put(skb, 2 + ssid_len);
1057 *pos++ = WLAN_EID_SSID;
1058 *pos++ = ssid_len;
1059 memcpy(pos, ssid, ssid_len);
1060
1061 supp_rates = skb_put(skb, 2);
1062 supp_rates[0] = WLAN_EID_SUPP_RATES;
1063 supp_rates[1] = 0;
1064 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1065
1066 for (i = 0; i < sband->n_bitrates; i++) {
1067 struct ieee80211_rate *rate = &sband->bitrates[i];
1068 if (esupp_rates) {
1069 pos = skb_put(skb, 1);
1070 esupp_rates[1]++;
1071 } else if (supp_rates[1] == 8) {
1072 esupp_rates = skb_put(skb, 3);
1073 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1074 esupp_rates[1] = 1;
1075 pos = &esupp_rates[2];
1076 } else {
1077 pos = skb_put(skb, 1);
1078 supp_rates[1]++;
1079 }
1080 *pos = rate->bitrate / 5;
1081 }
1082
1083 ieee80211_sta_tx(dev, skb, 0);
1084 }
1085
1086
1087 static int ieee80211_sta_wep_configured(struct net_device *dev)
1088 {
1089 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1090 if (!sdata || !sdata->default_key ||
1091 sdata->default_key->conf.alg != ALG_WEP)
1092 return 0;
1093 return 1;
1094 }
1095
1096
1097 static void ieee80211_auth_completed(struct net_device *dev,
1098 struct ieee80211_if_sta *ifsta)
1099 {
1100 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1101 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1102 ieee80211_associate(dev, ifsta);
1103 }
1104
1105
1106 static void ieee80211_auth_challenge(struct net_device *dev,
1107 struct ieee80211_if_sta *ifsta,
1108 struct ieee80211_mgmt *mgmt,
1109 size_t len)
1110 {
1111 u8 *pos;
1112 struct ieee802_11_elems elems;
1113
1114 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1115 pos = mgmt->u.auth.variable;
1116 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1117 if (!elems.challenge) {
1118 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1119 "frame\n", dev->name);
1120 return;
1121 }
1122 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1123 elems.challenge_len + 2, 1);
1124 }
1125
1126 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1127 u8 dialog_token, u16 status, u16 policy,
1128 u16 buf_size, u16 timeout)
1129 {
1130 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1131 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1132 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1133 struct sk_buff *skb;
1134 struct ieee80211_mgmt *mgmt;
1135 u16 capab;
1136
1137 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1138 sizeof(mgmt->u.action.u.addba_resp));
1139 if (!skb) {
1140 printk(KERN_DEBUG "%s: failed to allocate buffer "
1141 "for addba resp frame\n", dev->name);
1142 return;
1143 }
1144
1145 skb_reserve(skb, local->hw.extra_tx_headroom);
1146 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1147 memset(mgmt, 0, 24);
1148 memcpy(mgmt->da, da, ETH_ALEN);
1149 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1150 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1151 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1152 else
1153 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1154 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1155 IEEE80211_STYPE_ACTION);
1156
1157 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1158 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1159 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1160 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1161
1162 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1163 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1164 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1165
1166 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1167 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1168 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1169
1170 ieee80211_sta_tx(dev, skb, 0);
1171
1172 return;
1173 }
1174
1175 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1176 u16 tid, u8 dialog_token, u16 start_seq_num,
1177 u16 agg_size, u16 timeout)
1178 {
1179 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1180 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1181 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1182 struct sk_buff *skb;
1183 struct ieee80211_mgmt *mgmt;
1184 u16 capab;
1185
1186 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1187 sizeof(mgmt->u.action.u.addba_req));
1188
1189
1190 if (!skb) {
1191 printk(KERN_ERR "%s: failed to allocate buffer "
1192 "for addba request frame\n", dev->name);
1193 return;
1194 }
1195 skb_reserve(skb, local->hw.extra_tx_headroom);
1196 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1197 memset(mgmt, 0, 24);
1198 memcpy(mgmt->da, da, ETH_ALEN);
1199 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1200 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1201 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1202 else
1203 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1204
1205 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1206 IEEE80211_STYPE_ACTION);
1207
1208 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1209
1210 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1211 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1212
1213 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1214 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1215 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1216 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1217
1218 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1219
1220 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1221 mgmt->u.action.u.addba_req.start_seq_num =
1222 cpu_to_le16(start_seq_num << 4);
1223
1224 ieee80211_sta_tx(dev, skb, 0);
1225 }
1226
1227 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1228 struct ieee80211_mgmt *mgmt,
1229 size_t len)
1230 {
1231 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1232 struct ieee80211_hw *hw = &local->hw;
1233 struct ieee80211_conf *conf = &hw->conf;
1234 struct sta_info *sta;
1235 struct tid_ampdu_rx *tid_agg_rx;
1236 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1237 u8 dialog_token;
1238 int ret = -EOPNOTSUPP;
1239 DECLARE_MAC_BUF(mac);
1240
1241 rcu_read_lock();
1242
1243 sta = sta_info_get(local, mgmt->sa);
1244 if (!sta) {
1245 rcu_read_unlock();
1246 return;
1247 }
1248
1249 /* extract session parameters from addba request frame */
1250 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1251 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1252 start_seq_num =
1253 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1254
1255 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1256 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1257 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1258 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1259
1260 status = WLAN_STATUS_REQUEST_DECLINED;
1261
1262 /* sanity check for incoming parameters:
1263 * check if configuration can support the BA policy
1264 * and if buffer size does not exceeds max value */
1265 if (((ba_policy != 1)
1266 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1267 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1268 status = WLAN_STATUS_INVALID_QOS_PARAM;
1269 #ifdef CONFIG_MAC80211_HT_DEBUG
1270 if (net_ratelimit())
1271 printk(KERN_DEBUG "AddBA Req with bad params from "
1272 "%s on tid %u. policy %d, buffer size %d\n",
1273 print_mac(mac, mgmt->sa), tid, ba_policy,
1274 buf_size);
1275 #endif /* CONFIG_MAC80211_HT_DEBUG */
1276 goto end_no_lock;
1277 }
1278 /* determine default buffer size */
1279 if (buf_size == 0) {
1280 struct ieee80211_supported_band *sband;
1281
1282 sband = local->hw.wiphy->bands[conf->channel->band];
1283 buf_size = IEEE80211_MIN_AMPDU_BUF;
1284 buf_size = buf_size << sband->ht_info.ampdu_factor;
1285 }
1286
1287
1288 /* examine state machine */
1289 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1290
1291 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1292 #ifdef CONFIG_MAC80211_HT_DEBUG
1293 if (net_ratelimit())
1294 printk(KERN_DEBUG "unexpected AddBA Req from "
1295 "%s on tid %u\n",
1296 print_mac(mac, mgmt->sa), tid);
1297 #endif /* CONFIG_MAC80211_HT_DEBUG */
1298 goto end;
1299 }
1300
1301 /* prepare A-MPDU MLME for Rx aggregation */
1302 sta->ampdu_mlme.tid_rx[tid] =
1303 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1304 if (!sta->ampdu_mlme.tid_rx[tid]) {
1305 if (net_ratelimit())
1306 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1307 tid);
1308 goto end;
1309 }
1310 /* rx timer */
1311 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1312 sta_rx_agg_session_timer_expired;
1313 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1314 (unsigned long)&sta->timer_to_tid[tid];
1315 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1316
1317 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1318
1319 /* prepare reordering buffer */
1320 tid_agg_rx->reorder_buf =
1321 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1322 if (!tid_agg_rx->reorder_buf) {
1323 if (net_ratelimit())
1324 printk(KERN_ERR "can not allocate reordering buffer "
1325 "to tid %d\n", tid);
1326 kfree(sta->ampdu_mlme.tid_rx[tid]);
1327 goto end;
1328 }
1329 memset(tid_agg_rx->reorder_buf, 0,
1330 buf_size * sizeof(struct sk_buf *));
1331
1332 if (local->ops->ampdu_action)
1333 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1334 sta->addr, tid, &start_seq_num);
1335 #ifdef CONFIG_MAC80211_HT_DEBUG
1336 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1337 #endif /* CONFIG_MAC80211_HT_DEBUG */
1338
1339 if (ret) {
1340 kfree(tid_agg_rx->reorder_buf);
1341 kfree(tid_agg_rx);
1342 sta->ampdu_mlme.tid_rx[tid] = NULL;
1343 goto end;
1344 }
1345
1346 /* change state and send addba resp */
1347 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1348 tid_agg_rx->dialog_token = dialog_token;
1349 tid_agg_rx->ssn = start_seq_num;
1350 tid_agg_rx->head_seq_num = start_seq_num;
1351 tid_agg_rx->buf_size = buf_size;
1352 tid_agg_rx->timeout = timeout;
1353 tid_agg_rx->stored_mpdu_num = 0;
1354 status = WLAN_STATUS_SUCCESS;
1355 end:
1356 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1357
1358 end_no_lock:
1359 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1360 dialog_token, status, 1, buf_size, timeout);
1361 rcu_read_unlock();
1362 }
1363
1364 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1365 struct ieee80211_mgmt *mgmt,
1366 size_t len)
1367 {
1368 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1369 struct ieee80211_hw *hw = &local->hw;
1370 struct sta_info *sta;
1371 u16 capab;
1372 u16 tid;
1373 u8 *state;
1374
1375 rcu_read_lock();
1376
1377 sta = sta_info_get(local, mgmt->sa);
1378 if (!sta) {
1379 rcu_read_unlock();
1380 return;
1381 }
1382
1383 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1384 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1385
1386 state = &sta->ampdu_mlme.tid_state_tx[tid];
1387
1388 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1389
1390 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1391 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1392 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1393 "%d\n", *state);
1394 goto addba_resp_exit;
1395 }
1396
1397 if (mgmt->u.action.u.addba_resp.dialog_token !=
1398 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1399 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1400 #ifdef CONFIG_MAC80211_HT_DEBUG
1401 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1402 #endif /* CONFIG_MAC80211_HT_DEBUG */
1403 goto addba_resp_exit;
1404 }
1405
1406 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1407 #ifdef CONFIG_MAC80211_HT_DEBUG
1408 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1409 #endif /* CONFIG_MAC80211_HT_DEBUG */
1410 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1411 == WLAN_STATUS_SUCCESS) {
1412 if (*state & HT_ADDBA_RECEIVED_MSK)
1413 printk(KERN_DEBUG "double addBA response\n");
1414
1415 *state |= HT_ADDBA_RECEIVED_MSK;
1416 sta->ampdu_mlme.addba_req_num[tid] = 0;
1417
1418 if (*state == HT_AGG_STATE_OPERATIONAL) {
1419 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1420 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1421 }
1422
1423 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1424 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1425 } else {
1426 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1427
1428 sta->ampdu_mlme.addba_req_num[tid]++;
1429 /* this will allow the state check in stop_BA_session */
1430 *state = HT_AGG_STATE_OPERATIONAL;
1431 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1432 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1433 WLAN_BACK_INITIATOR);
1434 }
1435
1436 addba_resp_exit:
1437 rcu_read_unlock();
1438 }
1439
1440 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1441 u16 initiator, u16 reason_code)
1442 {
1443 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1444 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1445 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1446 struct sk_buff *skb;
1447 struct ieee80211_mgmt *mgmt;
1448 u16 params;
1449
1450 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1451 sizeof(mgmt->u.action.u.delba));
1452
1453 if (!skb) {
1454 printk(KERN_ERR "%s: failed to allocate buffer "
1455 "for delba frame\n", dev->name);
1456 return;
1457 }
1458
1459 skb_reserve(skb, local->hw.extra_tx_headroom);
1460 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1461 memset(mgmt, 0, 24);
1462 memcpy(mgmt->da, da, ETH_ALEN);
1463 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1464 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1465 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1466 else
1467 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1468 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1469 IEEE80211_STYPE_ACTION);
1470
1471 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1472
1473 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1474 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1475 params = (u16)(initiator << 11); /* bit 11 initiator */
1476 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1477
1478 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1479 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1480
1481 ieee80211_sta_tx(dev, skb, 0);
1482 }
1483
1484 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1485 u16 initiator, u16 reason)
1486 {
1487 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1488 struct ieee80211_hw *hw = &local->hw;
1489 struct sta_info *sta;
1490 int ret, i;
1491 DECLARE_MAC_BUF(mac);
1492
1493 rcu_read_lock();
1494
1495 sta = sta_info_get(local, ra);
1496 if (!sta) {
1497 rcu_read_unlock();
1498 return;
1499 }
1500
1501 /* check if TID is in operational state */
1502 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1503 if (sta->ampdu_mlme.tid_state_rx[tid]
1504 != HT_AGG_STATE_OPERATIONAL) {
1505 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1506 rcu_read_unlock();
1507 return;
1508 }
1509 sta->ampdu_mlme.tid_state_rx[tid] =
1510 HT_AGG_STATE_REQ_STOP_BA_MSK |
1511 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1512 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1513
1514 /* stop HW Rx aggregation. ampdu_action existence
1515 * already verified in session init so we add the BUG_ON */
1516 BUG_ON(!local->ops->ampdu_action);
1517
1518 #ifdef CONFIG_MAC80211_HT_DEBUG
1519 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1520 print_mac(mac, ra), tid);
1521 #endif /* CONFIG_MAC80211_HT_DEBUG */
1522
1523 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1524 ra, tid, NULL);
1525 if (ret)
1526 printk(KERN_DEBUG "HW problem - can not stop rx "
1527 "aggergation for tid %d\n", tid);
1528
1529 /* shutdown timer has not expired */
1530 if (initiator != WLAN_BACK_TIMER)
1531 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1532
1533 /* check if this is a self generated aggregation halt */
1534 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1535 ieee80211_send_delba(dev, ra, tid, 0, reason);
1536
1537 /* free the reordering buffer */
1538 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1539 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1540 /* release the reordered frames */
1541 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1542 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1543 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1544 }
1545 }
1546 /* free resources */
1547 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1548 kfree(sta->ampdu_mlme.tid_rx[tid]);
1549 sta->ampdu_mlme.tid_rx[tid] = NULL;
1550 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1551
1552 rcu_read_unlock();
1553 }
1554
1555
1556 static void ieee80211_sta_process_delba(struct net_device *dev,
1557 struct ieee80211_mgmt *mgmt, size_t len)
1558 {
1559 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1560 struct sta_info *sta;
1561 u16 tid, params;
1562 u16 initiator;
1563 DECLARE_MAC_BUF(mac);
1564
1565 rcu_read_lock();
1566
1567 sta = sta_info_get(local, mgmt->sa);
1568 if (!sta) {
1569 rcu_read_unlock();
1570 return;
1571 }
1572
1573 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1574 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1575 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1576
1577 #ifdef CONFIG_MAC80211_HT_DEBUG
1578 if (net_ratelimit())
1579 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1580 print_mac(mac, mgmt->sa),
1581 initiator ? "initiator" : "recipient", tid,
1582 mgmt->u.action.u.delba.reason_code);
1583 #endif /* CONFIG_MAC80211_HT_DEBUG */
1584
1585 if (initiator == WLAN_BACK_INITIATOR)
1586 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1587 WLAN_BACK_INITIATOR, 0);
1588 else { /* WLAN_BACK_RECIPIENT */
1589 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1590 sta->ampdu_mlme.tid_state_tx[tid] =
1591 HT_AGG_STATE_OPERATIONAL;
1592 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1593 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1594 WLAN_BACK_RECIPIENT);
1595 }
1596 rcu_read_unlock();
1597 }
1598
1599 /*
1600 * After sending add Block Ack request we activated a timer until
1601 * add Block Ack response will arrive from the recipient.
1602 * If this timer expires sta_addba_resp_timer_expired will be executed.
1603 */
1604 void sta_addba_resp_timer_expired(unsigned long data)
1605 {
1606 /* not an elegant detour, but there is no choice as the timer passes
1607 * only one argument, and both sta_info and TID are needed, so init
1608 * flow in sta_info_create gives the TID as data, while the timer_to_id
1609 * array gives the sta through container_of */
1610 u16 tid = *(int *)data;
1611 struct sta_info *temp_sta = container_of((void *)data,
1612 struct sta_info, timer_to_tid[tid]);
1613
1614 struct ieee80211_local *local = temp_sta->local;
1615 struct ieee80211_hw *hw = &local->hw;
1616 struct sta_info *sta;
1617 u8 *state;
1618
1619 rcu_read_lock();
1620
1621 sta = sta_info_get(local, temp_sta->addr);
1622 if (!sta) {
1623 rcu_read_unlock();
1624 return;
1625 }
1626
1627 state = &sta->ampdu_mlme.tid_state_tx[tid];
1628 /* check if the TID waits for addBA response */
1629 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1630 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1631 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1632 *state = HT_AGG_STATE_IDLE;
1633 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1634 "expecting addBA response there", tid);
1635 goto timer_expired_exit;
1636 }
1637
1638 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1639
1640 /* go through the state check in stop_BA_session */
1641 *state = HT_AGG_STATE_OPERATIONAL;
1642 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1643 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1644 WLAN_BACK_INITIATOR);
1645
1646 timer_expired_exit:
1647 rcu_read_unlock();
1648 }
1649
1650 /*
1651 * After accepting the AddBA Request we activated a timer,
1652 * resetting it after each frame that arrives from the originator.
1653 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1654 */
1655 void sta_rx_agg_session_timer_expired(unsigned long data)
1656 {
1657 /* not an elegant detour, but there is no choice as the timer passes
1658 * only one argument, and verious sta_info are needed here, so init
1659 * flow in sta_info_create gives the TID as data, while the timer_to_id
1660 * array gives the sta through container_of */
1661 u8 *ptid = (u8 *)data;
1662 u8 *timer_to_id = ptid - *ptid;
1663 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1664 timer_to_tid[0]);
1665
1666 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1667 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1668 (u16)*ptid, WLAN_BACK_TIMER,
1669 WLAN_REASON_QSTA_TIMEOUT);
1670 }
1671
1672 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1673 {
1674 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1675 int i;
1676
1677 for (i = 0; i < STA_TID_NUM; i++) {
1678 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1679 WLAN_BACK_INITIATOR);
1680 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1681 WLAN_BACK_RECIPIENT,
1682 WLAN_REASON_QSTA_LEAVE_QBSS);
1683 }
1684 }
1685
1686 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1687 struct ieee80211_if_sta *ifsta,
1688 struct ieee80211_mgmt *mgmt,
1689 size_t len)
1690 {
1691 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1692 u16 auth_alg, auth_transaction, status_code;
1693 DECLARE_MAC_BUF(mac);
1694
1695 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1696 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1697 printk(KERN_DEBUG "%s: authentication frame received from "
1698 "%s, but not in authenticate state - ignored\n",
1699 dev->name, print_mac(mac, mgmt->sa));
1700 return;
1701 }
1702
1703 if (len < 24 + 6) {
1704 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1705 "received from %s - ignored\n",
1706 dev->name, len, print_mac(mac, mgmt->sa));
1707 return;
1708 }
1709
1710 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1711 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1712 printk(KERN_DEBUG "%s: authentication frame received from "
1713 "unknown AP (SA=%s BSSID=%s) - "
1714 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1715 print_mac(mac, mgmt->bssid));
1716 return;
1717 }
1718
1719 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1720 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1721 printk(KERN_DEBUG "%s: authentication frame received from "
1722 "unknown BSSID (SA=%s BSSID=%s) - "
1723 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1724 print_mac(mac, mgmt->bssid));
1725 return;
1726 }
1727
1728 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1729 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1730 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1731
1732 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1733 "transaction=%d status=%d)\n",
1734 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1735 auth_transaction, status_code);
1736
1737 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1738 /* IEEE 802.11 standard does not require authentication in IBSS
1739 * networks and most implementations do not seem to use it.
1740 * However, try to reply to authentication attempts if someone
1741 * has actually implemented this.
1742 * TODO: Could implement shared key authentication. */
1743 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1744 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1745 "frame (alg=%d transaction=%d)\n",
1746 dev->name, auth_alg, auth_transaction);
1747 return;
1748 }
1749 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1750 }
1751
1752 if (auth_alg != ifsta->auth_alg ||
1753 auth_transaction != ifsta->auth_transaction) {
1754 printk(KERN_DEBUG "%s: unexpected authentication frame "
1755 "(alg=%d transaction=%d)\n",
1756 dev->name, auth_alg, auth_transaction);
1757 return;
1758 }
1759
1760 if (status_code != WLAN_STATUS_SUCCESS) {
1761 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1762 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1763 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1764 u8 algs[3];
1765 const int num_algs = ARRAY_SIZE(algs);
1766 int i, pos;
1767 algs[0] = algs[1] = algs[2] = 0xff;
1768 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1769 algs[0] = WLAN_AUTH_OPEN;
1770 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1771 algs[1] = WLAN_AUTH_SHARED_KEY;
1772 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1773 algs[2] = WLAN_AUTH_LEAP;
1774 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1775 pos = 0;
1776 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1777 pos = 1;
1778 else
1779 pos = 2;
1780 for (i = 0; i < num_algs; i++) {
1781 pos++;
1782 if (pos >= num_algs)
1783 pos = 0;
1784 if (algs[pos] == ifsta->auth_alg ||
1785 algs[pos] == 0xff)
1786 continue;
1787 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1788 !ieee80211_sta_wep_configured(dev))
1789 continue;
1790 ifsta->auth_alg = algs[pos];
1791 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1792 "next try\n",
1793 dev->name, ifsta->auth_alg);
1794 break;
1795 }
1796 }
1797 return;
1798 }
1799
1800 switch (ifsta->auth_alg) {
1801 case WLAN_AUTH_OPEN:
1802 case WLAN_AUTH_LEAP:
1803 ieee80211_auth_completed(dev, ifsta);
1804 break;
1805 case WLAN_AUTH_SHARED_KEY:
1806 if (ifsta->auth_transaction == 4)
1807 ieee80211_auth_completed(dev, ifsta);
1808 else
1809 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1810 break;
1811 }
1812 }
1813
1814
1815 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1816 struct ieee80211_if_sta *ifsta,
1817 struct ieee80211_mgmt *mgmt,
1818 size_t len)
1819 {
1820 u16 reason_code;
1821 DECLARE_MAC_BUF(mac);
1822
1823 if (len < 24 + 2) {
1824 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1825 "received from %s - ignored\n",
1826 dev->name, len, print_mac(mac, mgmt->sa));
1827 return;
1828 }
1829
1830 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1831 printk(KERN_DEBUG "%s: deauthentication frame received from "
1832 "unknown AP (SA=%s BSSID=%s) - "
1833 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1834 print_mac(mac, mgmt->bssid));
1835 return;
1836 }
1837
1838 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1839
1840 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1841 " (reason=%d)\n",
1842 dev->name, print_mac(mac, mgmt->sa), reason_code);
1843
1844 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1845 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1846 }
1847
1848 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1849 ifsta->state == IEEE80211_ASSOCIATE ||
1850 ifsta->state == IEEE80211_ASSOCIATED) {
1851 ifsta->state = IEEE80211_AUTHENTICATE;
1852 mod_timer(&ifsta->timer, jiffies +
1853 IEEE80211_RETRY_AUTH_INTERVAL);
1854 }
1855
1856 ieee80211_set_disassoc(dev, ifsta, 1);
1857 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1858 }
1859
1860
1861 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1862 struct ieee80211_if_sta *ifsta,
1863 struct ieee80211_mgmt *mgmt,
1864 size_t len)
1865 {
1866 u16 reason_code;
1867 DECLARE_MAC_BUF(mac);
1868
1869 if (len < 24 + 2) {
1870 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1871 "received from %s - ignored\n",
1872 dev->name, len, print_mac(mac, mgmt->sa));
1873 return;
1874 }
1875
1876 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1877 printk(KERN_DEBUG "%s: disassociation frame received from "
1878 "unknown AP (SA=%s BSSID=%s) - "
1879 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1880 print_mac(mac, mgmt->bssid));
1881 return;
1882 }
1883
1884 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1885
1886 printk(KERN_DEBUG "%s: RX disassociation from %s"
1887 " (reason=%d)\n",
1888 dev->name, print_mac(mac, mgmt->sa), reason_code);
1889
1890 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1891 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1892
1893 if (ifsta->state == IEEE80211_ASSOCIATED) {
1894 ifsta->state = IEEE80211_ASSOCIATE;
1895 mod_timer(&ifsta->timer, jiffies +
1896 IEEE80211_RETRY_AUTH_INTERVAL);
1897 }
1898
1899 ieee80211_set_disassoc(dev, ifsta, 0);
1900 }
1901
1902
1903 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1904 struct ieee80211_if_sta *ifsta,
1905 struct ieee80211_mgmt *mgmt,
1906 size_t len,
1907 int reassoc)
1908 {
1909 struct ieee80211_local *local = sdata->local;
1910 struct net_device *dev = sdata->dev;
1911 struct ieee80211_supported_band *sband;
1912 struct sta_info *sta;
1913 u64 rates, basic_rates;
1914 u16 capab_info, status_code, aid;
1915 struct ieee802_11_elems elems;
1916 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1917 u8 *pos;
1918 int i, j;
1919 DECLARE_MAC_BUF(mac);
1920 bool have_higher_than_11mbit = false;
1921
1922 /* AssocResp and ReassocResp have identical structure, so process both
1923 * of them in this function. */
1924
1925 if (ifsta->state != IEEE80211_ASSOCIATE) {
1926 printk(KERN_DEBUG "%s: association frame received from "
1927 "%s, but not in associate state - ignored\n",
1928 dev->name, print_mac(mac, mgmt->sa));
1929 return;
1930 }
1931
1932 if (len < 24 + 6) {
1933 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1934 "received from %s - ignored\n",
1935 dev->name, len, print_mac(mac, mgmt->sa));
1936 return;
1937 }
1938
1939 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1940 printk(KERN_DEBUG "%s: association frame received from "
1941 "unknown AP (SA=%s BSSID=%s) - "
1942 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1943 print_mac(mac, mgmt->bssid));
1944 return;
1945 }
1946
1947 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1948 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1949 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1950
1951 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1952 "status=%d aid=%d)\n",
1953 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1954 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1955
1956 if (status_code != WLAN_STATUS_SUCCESS) {
1957 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1958 dev->name, status_code);
1959 /* if this was a reassociation, ensure we try a "full"
1960 * association next time. This works around some broken APs
1961 * which do not correctly reject reassociation requests. */
1962 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1963 return;
1964 }
1965
1966 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1967 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1968 "set\n", dev->name, aid);
1969 aid &= ~(BIT(15) | BIT(14));
1970
1971 pos = mgmt->u.assoc_resp.variable;
1972 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1973
1974 if (!elems.supp_rates) {
1975 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1976 dev->name);
1977 return;
1978 }
1979
1980 printk(KERN_DEBUG "%s: associated\n", dev->name);
1981 ifsta->aid = aid;
1982 ifsta->ap_capab = capab_info;
1983
1984 kfree(ifsta->assocresp_ies);
1985 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1986 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1987 if (ifsta->assocresp_ies)
1988 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1989
1990 rcu_read_lock();
1991
1992 /* Add STA entry for the AP */
1993 sta = sta_info_get(local, ifsta->bssid);
1994 if (!sta) {
1995 struct ieee80211_sta_bss *bss;
1996 int err;
1997
1998 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1999 if (!sta) {
2000 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2001 " the AP\n", dev->name);
2002 rcu_read_unlock();
2003 return;
2004 }
2005 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2006 local->hw.conf.channel->center_freq,
2007 ifsta->ssid, ifsta->ssid_len);
2008 if (bss) {
2009 sta->last_rssi = bss->rssi;
2010 sta->last_signal = bss->signal;
2011 sta->last_noise = bss->noise;
2012 ieee80211_rx_bss_put(dev, bss);
2013 }
2014
2015 err = sta_info_insert(sta);
2016 if (err) {
2017 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2018 " the AP (error %d)\n", dev->name, err);
2019 rcu_read_unlock();
2020 return;
2021 }
2022 }
2023
2024 /*
2025 * FIXME: Do we really need to update the sta_info's information here?
2026 * We already know about the AP (we found it in our list) so it
2027 * should already be filled with the right info, no?
2028 * As is stands, all this is racy because typically we assume
2029 * the information that is filled in here (except flags) doesn't
2030 * change while a STA structure is alive. As such, it should move
2031 * to between the sta_info_alloc() and sta_info_insert() above.
2032 */
2033
2034 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2035 WLAN_STA_AUTHORIZED;
2036
2037 rates = 0;
2038 basic_rates = 0;
2039 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2040
2041 for (i = 0; i < elems.supp_rates_len; i++) {
2042 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2043
2044 if (rate > 110)
2045 have_higher_than_11mbit = true;
2046
2047 for (j = 0; j < sband->n_bitrates; j++) {
2048 if (sband->bitrates[j].bitrate == rate)
2049 rates |= BIT(j);
2050 if (elems.supp_rates[i] & 0x80)
2051 basic_rates |= BIT(j);
2052 }
2053 }
2054
2055 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2056 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2057
2058 if (rate > 110)
2059 have_higher_than_11mbit = true;
2060
2061 for (j = 0; j < sband->n_bitrates; j++) {
2062 if (sband->bitrates[j].bitrate == rate)
2063 rates |= BIT(j);
2064 if (elems.ext_supp_rates[i] & 0x80)
2065 basic_rates |= BIT(j);
2066 }
2067 }
2068
2069 sta->supp_rates[local->hw.conf.channel->band] = rates;
2070 sdata->basic_rates = basic_rates;
2071
2072 /* cf. IEEE 802.11 9.2.12 */
2073 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2074 have_higher_than_11mbit)
2075 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2076 else
2077 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2078
2079 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2080 struct ieee80211_ht_bss_info bss_info;
2081 ieee80211_ht_cap_ie_to_ht_info(
2082 (struct ieee80211_ht_cap *)
2083 elems.ht_cap_elem, &sta->ht_info);
2084 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2085 (struct ieee80211_ht_addt_info *)
2086 elems.ht_info_elem, &bss_info);
2087 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2088 }
2089
2090 rate_control_rate_init(sta, local);
2091
2092 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2093 sta->flags |= WLAN_STA_WME;
2094 rcu_read_unlock();
2095 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2096 elems.wmm_param_len);
2097 } else
2098 rcu_read_unlock();
2099
2100 /* set AID and assoc capability,
2101 * ieee80211_set_associated() will tell the driver */
2102 bss_conf->aid = aid;
2103 bss_conf->assoc_capability = capab_info;
2104 ieee80211_set_associated(dev, ifsta, 1);
2105
2106 ieee80211_associated(dev, ifsta);
2107 }
2108
2109
2110 /* Caller must hold local->sta_bss_lock */
2111 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2112 struct ieee80211_sta_bss *bss)
2113 {
2114 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2115 u8 hash_idx;
2116
2117 if (bss_mesh_cfg(bss))
2118 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2119 bss_mesh_id_len(bss));
2120 else
2121 hash_idx = STA_HASH(bss->bssid);
2122
2123 bss->hnext = local->sta_bss_hash[hash_idx];
2124 local->sta_bss_hash[hash_idx] = bss;
2125 }
2126
2127
2128 /* Caller must hold local->sta_bss_lock */
2129 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2130 struct ieee80211_sta_bss *bss)
2131 {
2132 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2133 struct ieee80211_sta_bss *b, *prev = NULL;
2134 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2135 while (b) {
2136 if (b == bss) {
2137 if (!prev)
2138 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2139 bss->hnext;
2140 else
2141 prev->hnext = bss->hnext;
2142 break;
2143 }
2144 prev = b;
2145 b = b->hnext;
2146 }
2147 }
2148
2149
2150 static struct ieee80211_sta_bss *
2151 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2152 u8 *ssid, u8 ssid_len)
2153 {
2154 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155 struct ieee80211_sta_bss *bss;
2156
2157 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2158 if (!bss)
2159 return NULL;
2160 atomic_inc(&bss->users);
2161 atomic_inc(&bss->users);
2162 memcpy(bss->bssid, bssid, ETH_ALEN);
2163 bss->freq = freq;
2164 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2165 memcpy(bss->ssid, ssid, ssid_len);
2166 bss->ssid_len = ssid_len;
2167 }
2168
2169 spin_lock_bh(&local->sta_bss_lock);
2170 /* TODO: order by RSSI? */
2171 list_add_tail(&bss->list, &local->sta_bss_list);
2172 __ieee80211_rx_bss_hash_add(dev, bss);
2173 spin_unlock_bh(&local->sta_bss_lock);
2174 return bss;
2175 }
2176
2177 static struct ieee80211_sta_bss *
2178 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2179 u8 *ssid, u8 ssid_len)
2180 {
2181 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2182 struct ieee80211_sta_bss *bss;
2183
2184 spin_lock_bh(&local->sta_bss_lock);
2185 bss = local->sta_bss_hash[STA_HASH(bssid)];
2186 while (bss) {
2187 if (!bss_mesh_cfg(bss) &&
2188 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2189 bss->freq == freq &&
2190 bss->ssid_len == ssid_len &&
2191 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2192 atomic_inc(&bss->users);
2193 break;
2194 }
2195 bss = bss->hnext;
2196 }
2197 spin_unlock_bh(&local->sta_bss_lock);
2198 return bss;
2199 }
2200
2201 #ifdef CONFIG_MAC80211_MESH
2202 static struct ieee80211_sta_bss *
2203 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2204 u8 *mesh_cfg, int freq)
2205 {
2206 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2207 struct ieee80211_sta_bss *bss;
2208
2209 spin_lock_bh(&local->sta_bss_lock);
2210 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2211 while (bss) {
2212 if (bss_mesh_cfg(bss) &&
2213 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2214 bss->freq == freq &&
2215 mesh_id_len == bss->mesh_id_len &&
2216 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2217 mesh_id_len))) {
2218 atomic_inc(&bss->users);
2219 break;
2220 }
2221 bss = bss->hnext;
2222 }
2223 spin_unlock_bh(&local->sta_bss_lock);
2224 return bss;
2225 }
2226
2227 static struct ieee80211_sta_bss *
2228 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2229 u8 *mesh_cfg, int mesh_config_len, int freq)
2230 {
2231 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2232 struct ieee80211_sta_bss *bss;
2233
2234 if (mesh_config_len != MESH_CFG_LEN)
2235 return NULL;
2236
2237 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2238 if (!bss)
2239 return NULL;
2240
2241 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2242 if (!bss->mesh_cfg) {
2243 kfree(bss);
2244 return NULL;
2245 }
2246
2247 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2248 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2249 if (!bss->mesh_id) {
2250 kfree(bss->mesh_cfg);
2251 kfree(bss);
2252 return NULL;
2253 }
2254 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2255 }
2256
2257 atomic_inc(&bss->users);
2258 atomic_inc(&bss->users);
2259 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2260 bss->mesh_id_len = mesh_id_len;
2261 bss->freq = freq;
2262 spin_lock_bh(&local->sta_bss_lock);
2263 /* TODO: order by RSSI? */
2264 list_add_tail(&bss->list, &local->sta_bss_list);
2265 __ieee80211_rx_bss_hash_add(dev, bss);
2266 spin_unlock_bh(&local->sta_bss_lock);
2267 return bss;
2268 }
2269 #endif
2270
2271 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2272 {
2273 kfree(bss->wpa_ie);
2274 kfree(bss->rsn_ie);
2275 kfree(bss->wmm_ie);
2276 kfree(bss->ht_ie);
2277 kfree(bss_mesh_id(bss));
2278 kfree(bss_mesh_cfg(bss));
2279 kfree(bss);
2280 }
2281
2282
2283 static void ieee80211_rx_bss_put(struct net_device *dev,
2284 struct ieee80211_sta_bss *bss)
2285 {
2286 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2287
2288 local_bh_disable();
2289 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2290 local_bh_enable();
2291 return;
2292 }
2293
2294 __ieee80211_rx_bss_hash_del(dev, bss);
2295 list_del(&bss->list);
2296 spin_unlock_bh(&local->sta_bss_lock);
2297 ieee80211_rx_bss_free(bss);
2298 }
2299
2300
2301 void ieee80211_rx_bss_list_init(struct net_device *dev)
2302 {
2303 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2304 spin_lock_init(&local->sta_bss_lock);
2305 INIT_LIST_HEAD(&local->sta_bss_list);
2306 }
2307
2308
2309 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2310 {
2311 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2312 struct ieee80211_sta_bss *bss, *tmp;
2313
2314 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2315 ieee80211_rx_bss_put(dev, bss);
2316 }
2317
2318
2319 static int ieee80211_sta_join_ibss(struct net_device *dev,
2320 struct ieee80211_if_sta *ifsta,
2321 struct ieee80211_sta_bss *bss)
2322 {
2323 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2324 int res, rates, i, j;
2325 struct sk_buff *skb;
2326 struct ieee80211_mgmt *mgmt;
2327 struct ieee80211_tx_control control;
2328 struct rate_selection ratesel;
2329 u8 *pos;
2330 struct ieee80211_sub_if_data *sdata;
2331 struct ieee80211_supported_band *sband;
2332
2333 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2334
2335 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2336
2337 /* Remove possible STA entries from other IBSS networks. */
2338 sta_info_flush_delayed(sdata);
2339
2340 if (local->ops->reset_tsf) {
2341 /* Reset own TSF to allow time synchronization work. */
2342 local->ops->reset_tsf(local_to_hw(local));
2343 }
2344 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2345 res = ieee80211_if_config(dev);
2346 if (res)
2347 return res;
2348
2349 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2350
2351 sdata->drop_unencrypted = bss->capability &
2352 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2353
2354 res = ieee80211_set_freq(local, bss->freq);
2355
2356 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2357 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2358 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2359 return -1;
2360 }
2361
2362 /* Set beacon template */
2363 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2364 do {
2365 if (!skb)
2366 break;
2367
2368 skb_reserve(skb, local->hw.extra_tx_headroom);
2369
2370 mgmt = (struct ieee80211_mgmt *)
2371 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2372 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2373 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2374 IEEE80211_STYPE_BEACON);
2375 memset(mgmt->da, 0xff, ETH_ALEN);
2376 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2377 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2378 mgmt->u.beacon.beacon_int =
2379 cpu_to_le16(local->hw.conf.beacon_int);
2380 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2381
2382 pos = skb_put(skb, 2 + ifsta->ssid_len);
2383 *pos++ = WLAN_EID_SSID;
2384 *pos++ = ifsta->ssid_len;
2385 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2386
2387 rates = bss->supp_rates_len;
2388 if (rates > 8)
2389 rates = 8;
2390 pos = skb_put(skb, 2 + rates);
2391 *pos++ = WLAN_EID_SUPP_RATES;
2392 *pos++ = rates;
2393 memcpy(pos, bss->supp_rates, rates);
2394
2395 if (bss->band == IEEE80211_BAND_2GHZ) {
2396 pos = skb_put(skb, 2 + 1);
2397 *pos++ = WLAN_EID_DS_PARAMS;
2398 *pos++ = 1;
2399 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2400 }
2401
2402 pos = skb_put(skb, 2 + 2);
2403 *pos++ = WLAN_EID_IBSS_PARAMS;
2404 *pos++ = 2;
2405 /* FIX: set ATIM window based on scan results */
2406 *pos++ = 0;
2407 *pos++ = 0;
2408
2409 if (bss->supp_rates_len > 8) {
2410 rates = bss->supp_rates_len - 8;
2411 pos = skb_put(skb, 2 + rates);
2412 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2413 *pos++ = rates;
2414 memcpy(pos, &bss->supp_rates[8], rates);
2415 }
2416
2417 memset(&control, 0, sizeof(control));
2418 rate_control_get_rate(dev, sband, skb, &ratesel);
2419 if (!ratesel.rate) {
2420 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2421 "for IBSS beacon\n", dev->name);
2422 break;
2423 }
2424 control.vif = &sdata->vif;
2425 control.tx_rate = ratesel.rate;
2426 if (sdata->bss_conf.use_short_preamble &&
2427 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2428 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2429 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2430 control.flags |= IEEE80211_TXCTL_NO_ACK;
2431 control.retry_limit = 1;
2432
2433 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2434 if (ifsta->probe_resp) {
2435 mgmt = (struct ieee80211_mgmt *)
2436 ifsta->probe_resp->data;
2437 mgmt->frame_control =
2438 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2439 IEEE80211_STYPE_PROBE_RESP);
2440 } else {
2441 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2442 "template for IBSS\n", dev->name);
2443 }
2444
2445 if (local->ops->beacon_update &&
2446 local->ops->beacon_update(local_to_hw(local),
2447 skb, &control) == 0) {
2448 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2449 "template\n", dev->name);
2450 skb = NULL;
2451 }
2452
2453 rates = 0;
2454 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2455 for (i = 0; i < bss->supp_rates_len; i++) {
2456 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2457 for (j = 0; j < sband->n_bitrates; j++)
2458 if (sband->bitrates[j].bitrate == bitrate)
2459 rates |= BIT(j);
2460 }
2461 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2462
2463 ieee80211_sta_def_wmm_params(dev, bss, 1);
2464 } while (0);
2465
2466 if (skb) {
2467 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2468 "template\n", dev->name);
2469 dev_kfree_skb(skb);
2470 }
2471
2472 ifsta->state = IEEE80211_IBSS_JOINED;
2473 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2474
2475 ieee80211_rx_bss_put(dev, bss);
2476
2477 return res;
2478 }
2479
2480 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2481 struct ieee802_11_elems *elems,
2482 enum ieee80211_band band)
2483 {
2484 struct ieee80211_supported_band *sband;
2485 struct ieee80211_rate *bitrates;
2486 size_t num_rates;
2487 u64 supp_rates;
2488 int i, j;
2489 sband = local->hw.wiphy->bands[band];
2490
2491 if (!sband) {
2492 WARN_ON(1);
2493 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2494 }
2495
2496 bitrates = sband->bitrates;
2497 num_rates = sband->n_bitrates;
2498 supp_rates = 0;
2499 for (i = 0; i < elems->supp_rates_len +
2500 elems->ext_supp_rates_len; i++) {
2501 u8 rate = 0;
2502 int own_rate;
2503 if (i < elems->supp_rates_len)
2504 rate = elems->supp_rates[i];
2505 else if (elems->ext_supp_rates)
2506 rate = elems->ext_supp_rates
2507 [i - elems->supp_rates_len];
2508 own_rate = 5 * (rate & 0x7f);
2509 for (j = 0; j < num_rates; j++)
2510 if (bitrates[j].bitrate == own_rate)
2511 supp_rates |= BIT(j);
2512 }
2513 return supp_rates;
2514 }
2515
2516
2517 static void ieee80211_rx_bss_info(struct net_device *dev,
2518 struct ieee80211_mgmt *mgmt,
2519 size_t len,
2520 struct ieee80211_rx_status *rx_status,
2521 int beacon)
2522 {
2523 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2524 struct ieee802_11_elems elems;
2525 size_t baselen;
2526 int freq, clen;
2527 struct ieee80211_sta_bss *bss;
2528 struct sta_info *sta;
2529 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2530 u64 beacon_timestamp, rx_timestamp;
2531 struct ieee80211_channel *channel;
2532 DECLARE_MAC_BUF(mac);
2533 DECLARE_MAC_BUF(mac2);
2534
2535 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2536 return; /* ignore ProbeResp to foreign address */
2537
2538 #if 0
2539 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2540 dev->name, beacon ? "Beacon" : "Probe Response",
2541 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2542 #endif
2543
2544 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2545 if (baselen > len)
2546 return;
2547
2548 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2549 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2550
2551 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2552 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2553 u64 rates = ieee80211_sta_get_rates(local, &elems,
2554 rx_status->band);
2555
2556 mesh_neighbour_update(mgmt->sa, rates, dev,
2557 mesh_peer_accepts_plinks(&elems, dev));
2558 }
2559
2560 rcu_read_lock();
2561
2562 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2563 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2564 (sta = sta_info_get(local, mgmt->sa))) {
2565 u64 prev_rates;
2566 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2567 rx_status->band);
2568
2569 prev_rates = sta->supp_rates[rx_status->band];
2570 sta->supp_rates[rx_status->band] &= supp_rates;
2571 if (sta->supp_rates[rx_status->band] == 0) {
2572 /* No matching rates - this should not really happen.
2573 * Make sure that at least one rate is marked
2574 * supported to avoid issues with TX rate ctrl. */
2575 sta->supp_rates[rx_status->band] =
2576 sdata->u.sta.supp_rates_bits[rx_status->band];
2577 }
2578 if (sta->supp_rates[rx_status->band] != prev_rates) {
2579 printk(KERN_DEBUG "%s: updated supp_rates set for "
2580 "%s based on beacon info (0x%llx & 0x%llx -> "
2581 "0x%llx)\n",
2582 dev->name, print_mac(mac, sta->addr),
2583 (unsigned long long) prev_rates,
2584 (unsigned long long) supp_rates,
2585 (unsigned long long) sta->supp_rates[rx_status->band]);
2586 }
2587 }
2588
2589 rcu_read_unlock();
2590
2591 if (elems.ds_params && elems.ds_params_len == 1)
2592 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2593 else
2594 freq = rx_status->freq;
2595
2596 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2597
2598 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2599 return;
2600
2601 #ifdef CONFIG_MAC80211_MESH
2602 if (elems.mesh_config)
2603 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2604 elems.mesh_id_len, elems.mesh_config, freq);
2605 else
2606 #endif
2607 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2608 elems.ssid, elems.ssid_len);
2609 if (!bss) {
2610 #ifdef CONFIG_MAC80211_MESH
2611 if (elems.mesh_config)
2612 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2613 elems.mesh_id_len, elems.mesh_config,
2614 elems.mesh_config_len, freq);
2615 else
2616 #endif
2617 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2618 elems.ssid, elems.ssid_len);
2619 if (!bss)
2620 return;
2621 } else {
2622 #if 0
2623 /* TODO: order by RSSI? */
2624 spin_lock_bh(&local->sta_bss_lock);
2625 list_move_tail(&bss->list, &local->sta_bss_list);
2626 spin_unlock_bh(&local->sta_bss_lock);
2627 #endif
2628 }
2629
2630 /* save the ERP value so that it is available at association time */
2631 if (elems.erp_info && elems.erp_info_len >= 1) {
2632 bss->erp_value = elems.erp_info[0];
2633 bss->has_erp_value = 1;
2634 }
2635
2636 if (elems.ht_cap_elem &&
2637 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2638 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2639 kfree(bss->ht_ie);
2640 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2641 if (bss->ht_ie) {
2642 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2643 elems.ht_cap_elem_len + 2);
2644 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2645 } else
2646 bss->ht_ie_len = 0;
2647 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2648 kfree(bss->ht_ie);
2649 bss->ht_ie = NULL;
2650 bss->ht_ie_len = 0;
2651 }
2652
2653 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2654 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2655
2656 bss->supp_rates_len = 0;
2657 if (elems.supp_rates) {
2658 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2659 if (clen > elems.supp_rates_len)
2660 clen = elems.supp_rates_len;
2661 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2662 clen);
2663 bss->supp_rates_len += clen;
2664 }
2665 if (elems.ext_supp_rates) {
2666 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2667 if (clen > elems.ext_supp_rates_len)
2668 clen = elems.ext_supp_rates_len;
2669 memcpy(&bss->supp_rates[bss->supp_rates_len],
2670 elems.ext_supp_rates, clen);
2671 bss->supp_rates_len += clen;
2672 }
2673
2674 bss->band = rx_status->band;
2675
2676 bss->timestamp = beacon_timestamp;
2677 bss->last_update = jiffies;
2678 bss->rssi = rx_status->ssi;
2679 bss->signal = rx_status->signal;
2680 bss->noise = rx_status->noise;
2681 if (!beacon && !bss->probe_resp)
2682 bss->probe_resp = true;
2683
2684 /*
2685 * In STA mode, the remaining parameters should not be overridden
2686 * by beacons because they're not necessarily accurate there.
2687 */
2688 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2689 bss->probe_resp && beacon) {
2690 ieee80211_rx_bss_put(dev, bss);
2691 return;
2692 }
2693
2694 if (elems.wpa &&
2695 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2696 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2697 kfree(bss->wpa_ie);
2698 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2699 if (bss->wpa_ie) {
2700 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2701 bss->wpa_ie_len = elems.wpa_len + 2;
2702 } else
2703 bss->wpa_ie_len = 0;
2704 } else if (!elems.wpa && bss->wpa_ie) {
2705 kfree(bss->wpa_ie);
2706 bss->wpa_ie = NULL;
2707 bss->wpa_ie_len = 0;
2708 }
2709
2710 if (elems.rsn &&
2711 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2712 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2713 kfree(bss->rsn_ie);
2714 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2715 if (bss->rsn_ie) {
2716 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2717 bss->rsn_ie_len = elems.rsn_len + 2;
2718 } else
2719 bss->rsn_ie_len = 0;
2720 } else if (!elems.rsn && bss->rsn_ie) {
2721 kfree(bss->rsn_ie);
2722 bss->rsn_ie = NULL;
2723 bss->rsn_ie_len = 0;
2724 }
2725
2726 /*
2727 * Cf.
2728 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2729 *
2730 * quoting:
2731 *
2732 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2733 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2734 * Alliance (September 1, 2004) is incorporated by reference herein.
2735 * The inclusion of the WMM Parameters in probe responses and
2736 * association responses is mandatory for WMM enabled networks. The
2737 * inclusion of the WMM Parameters in beacons, however, is optional.
2738 */
2739
2740 if (elems.wmm_param &&
2741 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2742 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2743 kfree(bss->wmm_ie);
2744 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2745 if (bss->wmm_ie) {
2746 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2747 elems.wmm_param_len + 2);
2748 bss->wmm_ie_len = elems.wmm_param_len + 2;
2749 } else
2750 bss->wmm_ie_len = 0;
2751 } else if (elems.wmm_info &&
2752 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2753 memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2754 /* As for certain AP's Fifth bit is not set in WMM IE in
2755 * beacon frames.So while parsing the beacon frame the
2756 * wmm_info structure is used instead of wmm_param.
2757 * wmm_info structure was never used to set bss->wmm_ie.
2758 * This code fixes this problem by copying the WME
2759 * information from wmm_info to bss->wmm_ie and enabling
2760 * n-band association.
2761 */
2762 kfree(bss->wmm_ie);
2763 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2764 if (bss->wmm_ie) {
2765 memcpy(bss->wmm_ie, elems.wmm_info - 2,
2766 elems.wmm_info_len + 2);
2767 bss->wmm_ie_len = elems.wmm_info_len + 2;
2768 } else
2769 bss->wmm_ie_len = 0;
2770 } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2771 kfree(bss->wmm_ie);
2772 bss->wmm_ie = NULL;
2773 bss->wmm_ie_len = 0;
2774 }
2775
2776 /* check if we need to merge IBSS */
2777 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2778 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2779 bss->capability & WLAN_CAPABILITY_IBSS &&
2780 bss->freq == local->oper_channel->center_freq &&
2781 elems.ssid_len == sdata->u.sta.ssid_len &&
2782 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2783 if (rx_status->flag & RX_FLAG_TSFT) {
2784 /* in order for correct IBSS merging we need mactime
2785 *
2786 * since mactime is defined as the time the first data
2787 * symbol of the frame hits the PHY, and the timestamp
2788 * of the beacon is defined as "the time that the data
2789 * symbol containing the first bit of the timestamp is
2790 * transmitted to the PHY plus the transmitting STA’s
2791 * delays through its local PHY from the MAC-PHY
2792 * interface to its interface with the WM"
2793 * (802.11 11.1.2) - equals the time this bit arrives at
2794 * the receiver - we have to take into account the
2795 * offset between the two.
2796 * e.g: at 1 MBit that means mactime is 192 usec earlier
2797 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2798 */
2799 int rate = local->hw.wiphy->bands[rx_status->band]->
2800 bitrates[rx_status->rate_idx].bitrate;
2801 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2802 } else if (local && local->ops && local->ops->get_tsf)
2803 /* second best option: get current TSF */
2804 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2805 else
2806 /* can't merge without knowing the TSF */
2807 rx_timestamp = -1LLU;
2808 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2809 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2810 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2811 print_mac(mac, mgmt->sa),
2812 print_mac(mac2, mgmt->bssid),
2813 (unsigned long long)rx_timestamp,
2814 (unsigned long long)beacon_timestamp,
2815 (unsigned long long)(rx_timestamp - beacon_timestamp),
2816 jiffies);
2817 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2818 if (beacon_timestamp > rx_timestamp) {
2819 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2820 if (net_ratelimit())
2821 #endif
2822 printk(KERN_DEBUG "%s: beacon TSF higher than "
2823 "local TSF - IBSS merge with BSSID %s\n",
2824 dev->name, print_mac(mac, mgmt->bssid));
2825 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2826 ieee80211_ibss_add_sta(dev, NULL,
2827 mgmt->bssid, mgmt->sa);
2828 }
2829 }
2830
2831 ieee80211_rx_bss_put(dev, bss);
2832 }
2833
2834
2835 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2836 struct ieee80211_mgmt *mgmt,
2837 size_t len,
2838 struct ieee80211_rx_status *rx_status)
2839 {
2840 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2841 }
2842
2843
2844 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2845 struct ieee80211_mgmt *mgmt,
2846 size_t len,
2847 struct ieee80211_rx_status *rx_status)
2848 {
2849 struct ieee80211_sub_if_data *sdata;
2850 struct ieee80211_if_sta *ifsta;
2851 size_t baselen;
2852 struct ieee802_11_elems elems;
2853 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2854 struct ieee80211_conf *conf = &local->hw.conf;
2855 u32 changed = 0;
2856
2857 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2858
2859 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2860 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2861 return;
2862 ifsta = &sdata->u.sta;
2863
2864 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2865 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2866 return;
2867
2868 /* Process beacon from the current BSS */
2869 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2870 if (baselen > len)
2871 return;
2872
2873 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2874
2875 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2876 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2877 elems.wmm_param_len);
2878 }
2879
2880 /* Do not send changes to driver if we are scanning. This removes
2881 * requirement that driver's bss_info_changed function needs to be
2882 * atomic. */
2883 if (local->sta_sw_scanning || local->sta_hw_scanning)
2884 return;
2885
2886 if (elems.erp_info && elems.erp_info_len >= 1)
2887 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2888 else {
2889 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2890 changed |= ieee80211_handle_protect_preamb(sdata, false,
2891 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2892 }
2893
2894 if (elems.ht_cap_elem && elems.ht_info_elem &&
2895 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2896 struct ieee80211_ht_bss_info bss_info;
2897
2898 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2899 (struct ieee80211_ht_addt_info *)
2900 elems.ht_info_elem, &bss_info);
2901 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2902 &bss_info);
2903 }
2904
2905 ieee80211_bss_info_change_notify(sdata, changed);
2906 }
2907
2908
2909 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2910 struct ieee80211_if_sta *ifsta,
2911 struct ieee80211_mgmt *mgmt,
2912 size_t len,
2913 struct ieee80211_rx_status *rx_status)
2914 {
2915 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2916 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2917 int tx_last_beacon;
2918 struct sk_buff *skb;
2919 struct ieee80211_mgmt *resp;
2920 u8 *pos, *end;
2921 DECLARE_MAC_BUF(mac);
2922 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2923 DECLARE_MAC_BUF(mac2);
2924 DECLARE_MAC_BUF(mac3);
2925 #endif
2926
2927 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2928 ifsta->state != IEEE80211_IBSS_JOINED ||
2929 len < 24 + 2 || !ifsta->probe_resp)
2930 return;
2931
2932 if (local->ops->tx_last_beacon)
2933 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2934 else
2935 tx_last_beacon = 1;
2936
2937 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2938 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2939 "%s (tx_last_beacon=%d)\n",
2940 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2941 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2942 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2943
2944 if (!tx_last_beacon)
2945 return;
2946
2947 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2948 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2949 return;
2950
2951 end = ((u8 *) mgmt) + len;
2952 pos = mgmt->u.probe_req.variable;
2953 if (pos[0] != WLAN_EID_SSID ||
2954 pos + 2 + pos[1] > end) {
2955 if (net_ratelimit()) {
2956 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2957 "from %s\n",
2958 dev->name, print_mac(mac, mgmt->sa));
2959 }
2960 return;
2961 }
2962 if (pos[1] != 0 &&
2963 (pos[1] != ifsta->ssid_len ||
2964 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2965 /* Ignore ProbeReq for foreign SSID */
2966 return;
2967 }
2968
2969 /* Reply with ProbeResp */
2970 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2971 if (!skb)
2972 return;
2973
2974 resp = (struct ieee80211_mgmt *) skb->data;
2975 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2976 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2977 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2978 dev->name, print_mac(mac, resp->da));
2979 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2980 ieee80211_sta_tx(dev, skb, 0);
2981 }
2982
2983 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2984 struct ieee80211_if_sta *ifsta,
2985 struct ieee80211_mgmt *mgmt,
2986 size_t len,
2987 struct ieee80211_rx_status *rx_status)
2988 {
2989 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2990
2991 if (len < IEEE80211_MIN_ACTION_SIZE)
2992 return;
2993
2994 switch (mgmt->u.action.category) {
2995 case WLAN_CATEGORY_BACK:
2996 switch (mgmt->u.action.u.addba_req.action_code) {
2997 case WLAN_ACTION_ADDBA_REQ:
2998 if (len < (IEEE80211_MIN_ACTION_SIZE +
2999 sizeof(mgmt->u.action.u.addba_req)))
3000 break;
3001 ieee80211_sta_process_addba_request(dev, mgmt, len);
3002 break;
3003 case WLAN_ACTION_ADDBA_RESP:
3004 if (len < (IEEE80211_MIN_ACTION_SIZE +
3005 sizeof(mgmt->u.action.u.addba_resp)))
3006 break;
3007 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3008 break;
3009 case WLAN_ACTION_DELBA:
3010 if (len < (IEEE80211_MIN_ACTION_SIZE +
3011 sizeof(mgmt->u.action.u.delba)))
3012 break;
3013 ieee80211_sta_process_delba(dev, mgmt, len);
3014 break;
3015 default:
3016 if (net_ratelimit())
3017 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3018 dev->name);
3019 break;
3020 }
3021 break;
3022 case PLINK_CATEGORY:
3023 if (ieee80211_vif_is_mesh(&sdata->vif))
3024 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3025 break;
3026 case MESH_PATH_SEL_CATEGORY:
3027 if (ieee80211_vif_is_mesh(&sdata->vif))
3028 mesh_rx_path_sel_frame(dev, mgmt, len);
3029 break;
3030 default:
3031 if (net_ratelimit())
3032 printk(KERN_DEBUG "%s: Rx unknown action frame - "
3033 "category=%d\n", dev->name, mgmt->u.action.category);
3034 break;
3035 }
3036 }
3037
3038 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3039 struct ieee80211_rx_status *rx_status)
3040 {
3041 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3042 struct ieee80211_sub_if_data *sdata;
3043 struct ieee80211_if_sta *ifsta;
3044 struct ieee80211_mgmt *mgmt;
3045 u16 fc;
3046
3047 if (skb->len < 24)
3048 goto fail;
3049
3050 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3051 ifsta = &sdata->u.sta;
3052
3053 mgmt = (struct ieee80211_mgmt *) skb->data;
3054 fc = le16_to_cpu(mgmt->frame_control);
3055
3056 switch (fc & IEEE80211_FCTL_STYPE) {
3057 case IEEE80211_STYPE_PROBE_REQ:
3058 case IEEE80211_STYPE_PROBE_RESP:
3059 case IEEE80211_STYPE_BEACON:
3060 case IEEE80211_STYPE_ACTION:
3061 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3062 case IEEE80211_STYPE_AUTH:
3063 case IEEE80211_STYPE_ASSOC_RESP:
3064 case IEEE80211_STYPE_REASSOC_RESP:
3065 case IEEE80211_STYPE_DEAUTH:
3066 case IEEE80211_STYPE_DISASSOC:
3067 skb_queue_tail(&ifsta->skb_queue, skb);
3068 queue_work(local->hw.workqueue, &ifsta->work);
3069 return;
3070 default:
3071 printk(KERN_DEBUG "%s: received unknown management frame - "
3072 "stype=%d\n", dev->name,
3073 (fc & IEEE80211_FCTL_STYPE) >> 4);
3074 break;
3075 }
3076
3077 fail:
3078 kfree_skb(skb);
3079 }
3080
3081
3082 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3083 struct sk_buff *skb)
3084 {
3085 struct ieee80211_rx_status *rx_status;
3086 struct ieee80211_sub_if_data *sdata;
3087 struct ieee80211_if_sta *ifsta;
3088 struct ieee80211_mgmt *mgmt;
3089 u16 fc;
3090
3091 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3092 ifsta = &sdata->u.sta;
3093
3094 rx_status = (struct ieee80211_rx_status *) skb->cb;
3095 mgmt = (struct ieee80211_mgmt *) skb->data;
3096 fc = le16_to_cpu(mgmt->frame_control);
3097
3098 switch (fc & IEEE80211_FCTL_STYPE) {
3099 case IEEE80211_STYPE_PROBE_REQ:
3100 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3101 rx_status);
3102 break;
3103 case IEEE80211_STYPE_PROBE_RESP:
3104 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3105 break;
3106 case IEEE80211_STYPE_BEACON:
3107 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3108 break;
3109 case IEEE80211_STYPE_AUTH:
3110 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3111 break;
3112 case IEEE80211_STYPE_ASSOC_RESP:
3113 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3114 break;
3115 case IEEE80211_STYPE_REASSOC_RESP:
3116 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3117 break;
3118 case IEEE80211_STYPE_DEAUTH:
3119 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3120 break;
3121 case IEEE80211_STYPE_DISASSOC:
3122 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3123 break;
3124 case IEEE80211_STYPE_ACTION:
3125 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3126 break;
3127 }
3128
3129 kfree_skb(skb);
3130 }
3131
3132
3133 ieee80211_rx_result
3134 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3135 struct ieee80211_rx_status *rx_status)
3136 {
3137 struct ieee80211_mgmt *mgmt;
3138 u16 fc;
3139
3140 if (skb->len < 2)
3141 return RX_DROP_UNUSABLE;
3142
3143 mgmt = (struct ieee80211_mgmt *) skb->data;
3144 fc = le16_to_cpu(mgmt->frame_control);
3145
3146 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3147 return RX_CONTINUE;
3148
3149 if (skb->len < 24)
3150 return RX_DROP_MONITOR;
3151
3152 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3153 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3154 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3155 skb->len, rx_status);
3156 dev_kfree_skb(skb);
3157 return RX_QUEUED;
3158 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3159 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3160 rx_status);
3161 dev_kfree_skb(skb);
3162 return RX_QUEUED;
3163 }
3164 }
3165 return RX_CONTINUE;
3166 }
3167
3168
3169 static int ieee80211_sta_active_ibss(struct net_device *dev)
3170 {
3171 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3172 int active = 0;
3173 struct sta_info *sta;
3174 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3175
3176 rcu_read_lock();
3177
3178 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3179 if (sta->sdata == sdata &&
3180 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3181 jiffies)) {
3182 active++;
3183 break;
3184 }
3185 }
3186
3187 rcu_read_unlock();
3188
3189 return active;
3190 }
3191
3192
3193 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3194 {
3195 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3196 struct sta_info *sta, *tmp;
3197 LIST_HEAD(tmp_list);
3198 DECLARE_MAC_BUF(mac);
3199 unsigned long flags;
3200
3201 spin_lock_irqsave(&local->sta_lock, flags);
3202 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3203 if (time_after(jiffies, sta->last_rx + exp_time)) {
3204 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3205 dev->name, print_mac(mac, sta->addr));
3206 __sta_info_unlink(&sta);
3207 if (sta)
3208 list_add(&sta->list, &tmp_list);
3209 }
3210 spin_unlock_irqrestore(&local->sta_lock, flags);
3211
3212 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3213 sta_info_destroy(sta);
3214 }
3215
3216
3217 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3218 struct ieee80211_if_sta *ifsta)
3219 {
3220 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3221
3222 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3223 if (ieee80211_sta_active_ibss(dev))
3224 return;
3225
3226 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3227 "IBSS networks with same SSID (merge)\n", dev->name);
3228 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3229 }
3230
3231
3232 #ifdef CONFIG_MAC80211_MESH
3233 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3234 struct ieee80211_if_sta *ifsta)
3235 {
3236 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3237 bool free_plinks;
3238
3239 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3240 mesh_path_expire(dev);
3241
3242 free_plinks = mesh_plink_availables(sdata);
3243 if (free_plinks != sdata->u.sta.accepting_plinks)
3244 ieee80211_if_config_beacon(dev);
3245
3246 mod_timer(&ifsta->timer, jiffies +
3247 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3248 }
3249
3250
3251 void ieee80211_start_mesh(struct net_device *dev)
3252 {
3253 struct ieee80211_if_sta *ifsta;
3254 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3255 ifsta = &sdata->u.sta;
3256 ifsta->state = IEEE80211_MESH_UP;
3257 ieee80211_sta_timer((unsigned long)sdata);
3258 }
3259 #endif
3260
3261
3262 void ieee80211_sta_timer(unsigned long data)
3263 {
3264 struct ieee80211_sub_if_data *sdata =
3265 (struct ieee80211_sub_if_data *) data;
3266 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3267 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3268
3269 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3270 queue_work(local->hw.workqueue, &ifsta->work);
3271 }
3272
3273 void ieee80211_sta_work(struct work_struct *work)
3274 {
3275 struct ieee80211_sub_if_data *sdata =
3276 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3277 struct net_device *dev = sdata->dev;
3278 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3279 struct ieee80211_if_sta *ifsta;
3280 struct sk_buff *skb;
3281
3282 if (!netif_running(dev))
3283 return;
3284
3285 if (local->sta_sw_scanning || local->sta_hw_scanning)
3286 return;
3287
3288 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3289 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3290 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3291 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3292 "(type=%d)\n", dev->name, sdata->vif.type);
3293 return;
3294 }
3295 ifsta = &sdata->u.sta;
3296
3297 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3298 ieee80211_sta_rx_queued_mgmt(dev, skb);
3299
3300 #ifdef CONFIG_MAC80211_MESH
3301 if (ifsta->preq_queue_len &&
3302 time_after(jiffies,
3303 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3304 mesh_path_start_discovery(dev);
3305 #endif
3306
3307 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3308 ifsta->state != IEEE80211_ASSOCIATE &&
3309 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3310 if (ifsta->scan_ssid_len)
3311 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3312 else
3313 ieee80211_sta_start_scan(dev, NULL, 0);
3314 return;
3315 }
3316
3317 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3318 if (ieee80211_sta_config_auth(dev, ifsta))
3319 return;
3320 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3321 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3322 return;
3323
3324 switch (ifsta->state) {
3325 case IEEE80211_DISABLED:
3326 break;
3327 case IEEE80211_AUTHENTICATE:
3328 ieee80211_authenticate(dev, ifsta);
3329 break;
3330 case IEEE80211_ASSOCIATE:
3331 ieee80211_associate(dev, ifsta);
3332 break;
3333 case IEEE80211_ASSOCIATED:
3334 ieee80211_associated(dev, ifsta);
3335 break;
3336 case IEEE80211_IBSS_SEARCH:
3337 ieee80211_sta_find_ibss(dev, ifsta);
3338 break;
3339 case IEEE80211_IBSS_JOINED:
3340 ieee80211_sta_merge_ibss(dev, ifsta);
3341 break;
3342 #ifdef CONFIG_MAC80211_MESH
3343 case IEEE80211_MESH_UP:
3344 ieee80211_mesh_housekeeping(dev, ifsta);
3345 break;
3346 #endif
3347 default:
3348 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3349 ifsta->state);
3350 break;
3351 }
3352
3353 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3354 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3355 "mixed-cell disabled - disassociate\n", dev->name);
3356
3357 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3358 ieee80211_set_disassoc(dev, ifsta, 0);
3359 }
3360 }
3361
3362
3363 static void ieee80211_sta_reset_auth(struct net_device *dev,
3364 struct ieee80211_if_sta *ifsta)
3365 {
3366 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3367
3368 if (local->ops->reset_tsf) {
3369 /* Reset own TSF to allow time synchronization work. */
3370 local->ops->reset_tsf(local_to_hw(local));
3371 }
3372
3373 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3374
3375
3376 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3377 ifsta->auth_alg = WLAN_AUTH_OPEN;
3378 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3379 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3380 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3381 ifsta->auth_alg = WLAN_AUTH_LEAP;
3382 else
3383 ifsta->auth_alg = WLAN_AUTH_OPEN;
3384 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3385 ifsta->auth_alg);
3386 ifsta->auth_transaction = -1;
3387 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3388 ifsta->auth_tries = ifsta->assoc_tries = 0;
3389 netif_carrier_off(dev);
3390 }
3391
3392
3393 void ieee80211_sta_req_auth(struct net_device *dev,
3394 struct ieee80211_if_sta *ifsta)
3395 {
3396 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3397 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3398
3399 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3400 return;
3401
3402 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3403 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3404 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3405 IEEE80211_STA_AUTO_SSID_SEL))) {
3406 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3407 queue_work(local->hw.workqueue, &ifsta->work);
3408 }
3409 }
3410
3411 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3412 const char *ssid, int ssid_len)
3413 {
3414 int tmp, hidden_ssid;
3415
3416 if (ssid_len == ifsta->ssid_len &&
3417 !memcmp(ifsta->ssid, ssid, ssid_len))
3418 return 1;
3419
3420 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3421 return 0;
3422
3423 hidden_ssid = 1;
3424 tmp = ssid_len;
3425 while (tmp--) {
3426 if (ssid[tmp] != '\0') {
3427 hidden_ssid = 0;
3428 break;
3429 }
3430 }
3431
3432 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3433 return 1;
3434
3435 if (ssid_len == 1 && ssid[0] == ' ')
3436 return 1;
3437
3438 return 0;
3439 }
3440
3441 static int ieee80211_sta_config_auth(struct net_device *dev,
3442 struct ieee80211_if_sta *ifsta)
3443 {
3444 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3445 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3446 struct ieee80211_sta_bss *bss, *selected = NULL;
3447 int top_rssi = 0, freq;
3448
3449 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3450 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3451 ifsta->state = IEEE80211_AUTHENTICATE;
3452 ieee80211_sta_reset_auth(dev, ifsta);
3453 return 0;
3454 }
3455
3456 spin_lock_bh(&local->sta_bss_lock);
3457 freq = local->oper_channel->center_freq;
3458 list_for_each_entry(bss, &local->sta_bss_list, list) {
3459 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3460 continue;
3461
3462 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3463 !!sdata->default_key)
3464 continue;
3465
3466 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3467 bss->freq != freq)
3468 continue;
3469
3470 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3471 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3472 continue;
3473
3474 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3475 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3476 continue;
3477
3478 if (!selected || top_rssi < bss->rssi) {
3479 selected = bss;
3480 top_rssi = bss->rssi;
3481 }
3482 }
3483 if (selected)
3484 atomic_inc(&selected->users);
3485 spin_unlock_bh(&local->sta_bss_lock);
3486
3487 if (selected) {
3488 ieee80211_set_freq(local, selected->freq);
3489 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3490 ieee80211_sta_set_ssid(dev, selected->ssid,
3491 selected->ssid_len);
3492 ieee80211_sta_set_bssid(dev, selected->bssid);
3493 ieee80211_sta_def_wmm_params(dev, selected, 0);
3494 ieee80211_rx_bss_put(dev, selected);
3495 ifsta->state = IEEE80211_AUTHENTICATE;
3496 ieee80211_sta_reset_auth(dev, ifsta);
3497 return 0;
3498 } else {
3499 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3500 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3501 ieee80211_sta_start_scan(dev, NULL, 0);
3502 else
3503 ieee80211_sta_start_scan(dev, ifsta->ssid,
3504 ifsta->ssid_len);
3505 ifsta->state = IEEE80211_AUTHENTICATE;
3506 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3507 } else
3508 ifsta->state = IEEE80211_DISABLED;
3509 }
3510 return -1;
3511 }
3512
3513
3514 static int ieee80211_sta_create_ibss(struct net_device *dev,
3515 struct ieee80211_if_sta *ifsta)
3516 {
3517 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3518 struct ieee80211_sta_bss *bss;
3519 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3520 struct ieee80211_supported_band *sband;
3521 u8 bssid[ETH_ALEN], *pos;
3522 int i;
3523 DECLARE_MAC_BUF(mac);
3524
3525 #if 0
3526 /* Easier testing, use fixed BSSID. */
3527 memset(bssid, 0xfe, ETH_ALEN);
3528 #else
3529 /* Generate random, not broadcast, locally administered BSSID. Mix in
3530 * own MAC address to make sure that devices that do not have proper
3531 * random number generator get different BSSID. */
3532 get_random_bytes(bssid, ETH_ALEN);
3533 for (i = 0; i < ETH_ALEN; i++)
3534 bssid[i] ^= dev->dev_addr[i];
3535 bssid[0] &= ~0x01;
3536 bssid[0] |= 0x02;
3537 #endif
3538
3539 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3540 dev->name, print_mac(mac, bssid));
3541
3542 bss = ieee80211_rx_bss_add(dev, bssid,
3543 local->hw.conf.channel->center_freq,
3544 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3545 if (!bss)
3546 return -ENOMEM;
3547
3548 bss->band = local->hw.conf.channel->band;
3549 sband = local->hw.wiphy->bands[bss->band];
3550
3551 if (local->hw.conf.beacon_int == 0)
3552 local->hw.conf.beacon_int = 10000;
3553 bss->beacon_int = local->hw.conf.beacon_int;
3554 bss->last_update = jiffies;
3555 bss->capability = WLAN_CAPABILITY_IBSS;
3556 if (sdata->default_key) {
3557 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3558 } else
3559 sdata->drop_unencrypted = 0;
3560 bss->supp_rates_len = sband->n_bitrates;
3561 pos = bss->supp_rates;
3562 for (i = 0; i < sband->n_bitrates; i++) {
3563 int rate = sband->bitrates[i].bitrate;
3564 *pos++ = (u8) (rate / 5);
3565 }
3566
3567 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3568 }
3569
3570
3571 static int ieee80211_sta_find_ibss(struct net_device *dev,
3572 struct ieee80211_if_sta *ifsta)
3573 {
3574 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3575 struct ieee80211_sta_bss *bss;
3576 int found = 0;
3577 u8 bssid[ETH_ALEN];
3578 int active_ibss;
3579 DECLARE_MAC_BUF(mac);
3580 DECLARE_MAC_BUF(mac2);
3581
3582 if (ifsta->ssid_len == 0)
3583 return -EINVAL;
3584
3585 active_ibss = ieee80211_sta_active_ibss(dev);
3586 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3587 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3588 dev->name, active_ibss);
3589 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3590 spin_lock_bh(&local->sta_bss_lock);
3591 list_for_each_entry(bss, &local->sta_bss_list, list) {
3592 if (ifsta->ssid_len != bss->ssid_len ||
3593 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3594 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3595 continue;
3596 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3597 printk(KERN_DEBUG " bssid=%s found\n",
3598 print_mac(mac, bss->bssid));
3599 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3600 memcpy(bssid, bss->bssid, ETH_ALEN);
3601 found = 1;
3602 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3603 break;
3604 }
3605 spin_unlock_bh(&local->sta_bss_lock);
3606
3607 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3608 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3609 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3610 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3611 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3612 (bss = ieee80211_rx_bss_get(dev, bssid,
3613 local->hw.conf.channel->center_freq,
3614 ifsta->ssid, ifsta->ssid_len))) {
3615 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3616 " based on configured SSID\n",
3617 dev->name, print_mac(mac, bssid));
3618 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3619 }
3620 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3621 printk(KERN_DEBUG " did not try to join ibss\n");
3622 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3623
3624 /* Selected IBSS not found in current scan results - try to scan */
3625 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3626 !ieee80211_sta_active_ibss(dev)) {
3627 mod_timer(&ifsta->timer, jiffies +
3628 IEEE80211_IBSS_MERGE_INTERVAL);
3629 } else if (time_after(jiffies, local->last_scan_completed +
3630 IEEE80211_SCAN_INTERVAL)) {
3631 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3632 "join\n", dev->name);
3633 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3634 ifsta->ssid_len);
3635 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3636 int interval = IEEE80211_SCAN_INTERVAL;
3637
3638 if (time_after(jiffies, ifsta->ibss_join_req +
3639 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3640 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3641 (!(local->oper_channel->flags &
3642 IEEE80211_CHAN_NO_IBSS)))
3643 return ieee80211_sta_create_ibss(dev, ifsta);
3644 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3645 printk(KERN_DEBUG "%s: IBSS not allowed on"
3646 " %d MHz\n", dev->name,
3647 local->hw.conf.channel->center_freq);
3648 }
3649
3650 /* No IBSS found - decrease scan interval and continue
3651 * scanning. */
3652 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3653 }
3654
3655 ifsta->state = IEEE80211_IBSS_SEARCH;
3656 mod_timer(&ifsta->timer, jiffies + interval);
3657 return 0;
3658 }
3659
3660 return 0;
3661 }
3662
3663
3664 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3665 {
3666 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3667 struct ieee80211_if_sta *ifsta;
3668
3669 if (len > IEEE80211_MAX_SSID_LEN)
3670 return -EINVAL;
3671
3672 ifsta = &sdata->u.sta;
3673
3674 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3675 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3676 memcpy(ifsta->ssid, ssid, len);
3677 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3678 ifsta->ssid_len = len;
3679
3680 if (len)
3681 ifsta->flags |= IEEE80211_STA_SSID_SET;
3682 else
3683 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3684 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3685 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3686 ifsta->ibss_join_req = jiffies;
3687 ifsta->state = IEEE80211_IBSS_SEARCH;
3688 return ieee80211_sta_find_ibss(dev, ifsta);
3689 }
3690 return 0;
3691 }
3692
3693
3694 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3695 {
3696 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3697 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3698 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3699 *len = ifsta->ssid_len;
3700 return 0;
3701 }
3702
3703
3704 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3705 {
3706 struct ieee80211_sub_if_data *sdata;
3707 struct ieee80211_if_sta *ifsta;
3708 int res;
3709
3710 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3711 ifsta = &sdata->u.sta;
3712
3713 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3714 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3715 res = ieee80211_if_config(dev);
3716 if (res) {
3717 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3718 "the low-level driver\n", dev->name);
3719 return res;
3720 }
3721 }
3722
3723 if (is_valid_ether_addr(bssid))
3724 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3725 else
3726 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3727
3728 return 0;
3729 }
3730
3731
3732 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3733 struct ieee80211_sub_if_data *sdata,
3734 int powersave)
3735 {
3736 struct sk_buff *skb;
3737 struct ieee80211_hdr *nullfunc;
3738 u16 fc;
3739
3740 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3741 if (!skb) {
3742 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3743 "frame\n", sdata->dev->name);
3744 return;
3745 }
3746 skb_reserve(skb, local->hw.extra_tx_headroom);
3747
3748 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3749 memset(nullfunc, 0, 24);
3750 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3751 IEEE80211_FCTL_TODS;
3752 if (powersave)
3753 fc |= IEEE80211_FCTL_PM;
3754 nullfunc->frame_control = cpu_to_le16(fc);
3755 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3756 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3757 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3758
3759 ieee80211_sta_tx(sdata->dev, skb, 0);
3760 }
3761
3762
3763 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3764 {
3765 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3766 ieee80211_vif_is_mesh(&sdata->vif))
3767 ieee80211_sta_timer((unsigned long)sdata);
3768 }
3769
3770 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3771 {
3772 struct ieee80211_local *local = hw_to_local(hw);
3773 struct net_device *dev = local->scan_dev;
3774 struct ieee80211_sub_if_data *sdata;
3775 union iwreq_data wrqu;
3776
3777 local->last_scan_completed = jiffies;
3778 memset(&wrqu, 0, sizeof(wrqu));
3779 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3780
3781 if (local->sta_hw_scanning) {
3782 local->sta_hw_scanning = 0;
3783 if (ieee80211_hw_config(local))
3784 printk(KERN_DEBUG "%s: failed to restore operational "
3785 "channel after scan\n", dev->name);
3786 /* Restart STA timer for HW scan case */
3787 rcu_read_lock();
3788 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3789 ieee80211_restart_sta_timer(sdata);
3790 rcu_read_unlock();
3791
3792 goto done;
3793 }
3794
3795 local->sta_sw_scanning = 0;
3796 if (ieee80211_hw_config(local))
3797 printk(KERN_DEBUG "%s: failed to restore operational "
3798 "channel after scan\n", dev->name);
3799
3800
3801 netif_tx_lock_bh(local->mdev);
3802 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3803 local->ops->configure_filter(local_to_hw(local),
3804 FIF_BCN_PRBRESP_PROMISC,
3805 &local->filter_flags,
3806 local->mdev->mc_count,
3807 local->mdev->mc_list);
3808
3809 netif_tx_unlock_bh(local->mdev);
3810
3811 rcu_read_lock();
3812 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3813
3814 /* No need to wake the master device. */
3815 if (sdata->dev == local->mdev)
3816 continue;
3817
3818 /* Tell AP we're back */
3819 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3820 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3821 ieee80211_send_nullfunc(local, sdata, 0);
3822
3823 ieee80211_restart_sta_timer(sdata);
3824
3825 netif_wake_queue(sdata->dev);
3826 }
3827 rcu_read_unlock();
3828
3829 done:
3830 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3831 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3832 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3833 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3834 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3835 !ieee80211_sta_active_ibss(dev)))
3836 ieee80211_sta_find_ibss(dev, ifsta);
3837 }
3838 }
3839 EXPORT_SYMBOL(ieee80211_scan_completed);
3840
3841 void ieee80211_sta_scan_work(struct work_struct *work)
3842 {
3843 struct ieee80211_local *local =
3844 container_of(work, struct ieee80211_local, scan_work.work);
3845 struct net_device *dev = local->scan_dev;
3846 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3847 struct ieee80211_supported_band *sband;
3848 struct ieee80211_channel *chan;
3849 int skip;
3850 unsigned long next_delay = 0;
3851
3852 if (!local->sta_sw_scanning)
3853 return;
3854
3855 switch (local->scan_state) {
3856 case SCAN_SET_CHANNEL:
3857 /*
3858 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3859 * after we successfully scanned the last channel of the last
3860 * band (and the last band is supported by the hw)
3861 */
3862 if (local->scan_band < IEEE80211_NUM_BANDS)
3863 sband = local->hw.wiphy->bands[local->scan_band];
3864 else
3865 sband = NULL;
3866
3867 /*
3868 * If we are at an unsupported band and have more bands
3869 * left to scan, advance to the next supported one.
3870 */
3871 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3872 local->scan_band++;
3873 sband = local->hw.wiphy->bands[local->scan_band];
3874 local->scan_channel_idx = 0;
3875 }
3876
3877 /* if no more bands/channels left, complete scan */
3878 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3879 ieee80211_scan_completed(local_to_hw(local));
3880 return;
3881 }
3882 skip = 0;
3883 chan = &sband->channels[local->scan_channel_idx];
3884
3885 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3886 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3887 chan->flags & IEEE80211_CHAN_NO_IBSS))
3888 skip = 1;
3889
3890 if (!skip) {
3891 local->scan_channel = chan;
3892 if (ieee80211_hw_config(local)) {
3893 printk(KERN_DEBUG "%s: failed to set freq to "
3894 "%d MHz for scan\n", dev->name,
3895 chan->center_freq);
3896 skip = 1;
3897 }
3898 }
3899
3900 /* advance state machine to next channel/band */
3901 local->scan_channel_idx++;
3902 if (local->scan_channel_idx >= sband->n_channels) {
3903 /*
3904 * scan_band may end up == IEEE80211_NUM_BANDS, but
3905 * we'll catch that case above and complete the scan
3906 * if that is the case.
3907 */
3908 local->scan_band++;
3909 local->scan_channel_idx = 0;
3910 }
3911
3912 if (skip)
3913 break;
3914
3915 next_delay = IEEE80211_PROBE_DELAY +
3916 usecs_to_jiffies(local->hw.channel_change_time);
3917 local->scan_state = SCAN_SEND_PROBE;
3918 break;
3919 case SCAN_SEND_PROBE:
3920 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3921 local->scan_state = SCAN_SET_CHANNEL;
3922
3923 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3924 break;
3925 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3926 local->scan_ssid_len);
3927 next_delay = IEEE80211_CHANNEL_TIME;
3928 break;
3929 }
3930
3931 if (local->sta_sw_scanning)
3932 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3933 next_delay);
3934 }
3935
3936
3937 static int ieee80211_sta_start_scan(struct net_device *dev,
3938 u8 *ssid, size_t ssid_len)
3939 {
3940 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3941 struct ieee80211_sub_if_data *sdata;
3942
3943 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3944 return -EINVAL;
3945
3946 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3947 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3948 * BSSID: MACAddress
3949 * SSID
3950 * ScanType: ACTIVE, PASSIVE
3951 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3952 * a Probe frame during active scanning
3953 * ChannelList
3954 * MinChannelTime (>= ProbeDelay), in TU
3955 * MaxChannelTime: (>= MinChannelTime), in TU
3956 */
3957
3958 /* MLME-SCAN.confirm
3959 * BSSDescriptionSet
3960 * ResultCode: SUCCESS, INVALID_PARAMETERS
3961 */
3962
3963 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3964 if (local->scan_dev == dev)
3965 return 0;
3966 return -EBUSY;
3967 }
3968
3969 if (local->ops->hw_scan) {
3970 int rc = local->ops->hw_scan(local_to_hw(local),
3971 ssid, ssid_len);
3972 if (!rc) {
3973 local->sta_hw_scanning = 1;
3974 local->scan_dev = dev;
3975 }
3976 return rc;
3977 }
3978
3979 local->sta_sw_scanning = 1;
3980
3981 rcu_read_lock();
3982 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3983
3984 /* Don't stop the master interface, otherwise we can't transmit
3985 * probes! */
3986 if (sdata->dev == local->mdev)
3987 continue;
3988
3989 netif_stop_queue(sdata->dev);
3990 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3991 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3992 ieee80211_send_nullfunc(local, sdata, 1);
3993 }
3994 rcu_read_unlock();
3995
3996 if (ssid) {
3997 local->scan_ssid_len = ssid_len;
3998 memcpy(local->scan_ssid, ssid, ssid_len);
3999 } else
4000 local->scan_ssid_len = 0;
4001 local->scan_state = SCAN_SET_CHANNEL;
4002 local->scan_channel_idx = 0;
4003 local->scan_band = IEEE80211_BAND_2GHZ;
4004 local->scan_dev = dev;
4005
4006 netif_tx_lock_bh(local->mdev);
4007 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4008 local->ops->configure_filter(local_to_hw(local),
4009 FIF_BCN_PRBRESP_PROMISC,
4010 &local->filter_flags,
4011 local->mdev->mc_count,
4012 local->mdev->mc_list);
4013 netif_tx_unlock_bh(local->mdev);
4014
4015 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4016 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4017 IEEE80211_CHANNEL_TIME);
4018
4019 return 0;
4020 }
4021
4022
4023 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4024 {
4025 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4026 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4027 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4028
4029 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4030 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4031
4032 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4033 if (local->scan_dev == dev)
4034 return 0;
4035 return -EBUSY;
4036 }
4037
4038 ifsta->scan_ssid_len = ssid_len;
4039 if (ssid_len)
4040 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4041 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4042 queue_work(local->hw.workqueue, &ifsta->work);
4043 return 0;
4044 }
4045
4046 static char *
4047 ieee80211_sta_scan_result(struct net_device *dev,
4048 struct ieee80211_sta_bss *bss,
4049 char *current_ev, char *end_buf)
4050 {
4051 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4052 struct iw_event iwe;
4053
4054 if (time_after(jiffies,
4055 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4056 return current_ev;
4057
4058 memset(&iwe, 0, sizeof(iwe));
4059 iwe.cmd = SIOCGIWAP;
4060 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4061 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4062 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4063 IW_EV_ADDR_LEN);
4064
4065 memset(&iwe, 0, sizeof(iwe));
4066 iwe.cmd = SIOCGIWESSID;
4067 if (bss_mesh_cfg(bss)) {
4068 iwe.u.data.length = bss_mesh_id_len(bss);
4069 iwe.u.data.flags = 1;
4070 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4071 bss_mesh_id(bss));
4072 } else {
4073 iwe.u.data.length = bss->ssid_len;
4074 iwe.u.data.flags = 1;
4075 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4076 bss->ssid);
4077 }
4078
4079 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4080 || bss_mesh_cfg(bss)) {
4081 memset(&iwe, 0, sizeof(iwe));
4082 iwe.cmd = SIOCGIWMODE;
4083 if (bss_mesh_cfg(bss))
4084 iwe.u.mode = IW_MODE_MESH;
4085 else if (bss->capability & WLAN_CAPABILITY_ESS)
4086 iwe.u.mode = IW_MODE_MASTER;
4087 else
4088 iwe.u.mode = IW_MODE_ADHOC;
4089 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4090 IW_EV_UINT_LEN);
4091 }
4092
4093 memset(&iwe, 0, sizeof(iwe));
4094 iwe.cmd = SIOCGIWFREQ;
4095 iwe.u.freq.m = bss->freq;
4096 iwe.u.freq.e = 6;
4097 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4098 IW_EV_FREQ_LEN);
4099
4100 memset(&iwe, 0, sizeof(iwe));
4101 iwe.cmd = SIOCGIWFREQ;
4102 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4103 iwe.u.freq.e = 0;
4104 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4105 IW_EV_FREQ_LEN);
4106
4107 memset(&iwe, 0, sizeof(iwe));
4108 iwe.cmd = IWEVQUAL;
4109 iwe.u.qual.qual = bss->signal;
4110 iwe.u.qual.level = bss->rssi;
4111 iwe.u.qual.noise = bss->noise;
4112 iwe.u.qual.updated = local->wstats_flags;
4113 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4114 IW_EV_QUAL_LEN);
4115
4116 memset(&iwe, 0, sizeof(iwe));
4117 iwe.cmd = SIOCGIWENCODE;
4118 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4119 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4120 else
4121 iwe.u.data.flags = IW_ENCODE_DISABLED;
4122 iwe.u.data.length = 0;
4123 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4124
4125 if (bss && bss->wpa_ie) {
4126 memset(&iwe, 0, sizeof(iwe));
4127 iwe.cmd = IWEVGENIE;
4128 iwe.u.data.length = bss->wpa_ie_len;
4129 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4130 bss->wpa_ie);
4131 }
4132
4133 if (bss && bss->rsn_ie) {
4134 memset(&iwe, 0, sizeof(iwe));
4135 iwe.cmd = IWEVGENIE;
4136 iwe.u.data.length = bss->rsn_ie_len;
4137 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4138 bss->rsn_ie);
4139 }
4140
4141 if (bss && bss->supp_rates_len > 0) {
4142 /* display all supported rates in readable format */
4143 char *p = current_ev + IW_EV_LCP_LEN;
4144 int i;
4145
4146 memset(&iwe, 0, sizeof(iwe));
4147 iwe.cmd = SIOCGIWRATE;
4148 /* Those two flags are ignored... */
4149 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4150
4151 for (i = 0; i < bss->supp_rates_len; i++) {
4152 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4153 0x7f) * 500000);
4154 p = iwe_stream_add_value(current_ev, p,
4155 end_buf, &iwe, IW_EV_PARAM_LEN);
4156 }
4157 current_ev = p;
4158 }
4159
4160 if (bss) {
4161 char *buf;
4162 buf = kmalloc(30, GFP_ATOMIC);
4163 if (buf) {
4164 memset(&iwe, 0, sizeof(iwe));
4165 iwe.cmd = IWEVCUSTOM;
4166 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4167 iwe.u.data.length = strlen(buf);
4168 current_ev = iwe_stream_add_point(current_ev, end_buf,
4169 &iwe, buf);
4170 kfree(buf);
4171 }
4172 }
4173
4174 if (bss_mesh_cfg(bss)) {
4175 char *buf;
4176 u8 *cfg = bss_mesh_cfg(bss);
4177 buf = kmalloc(50, GFP_ATOMIC);
4178 if (buf) {
4179 memset(&iwe, 0, sizeof(iwe));
4180 iwe.cmd = IWEVCUSTOM;
4181 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4182 iwe.u.data.length = strlen(buf);
4183 current_ev = iwe_stream_add_point(current_ev, end_buf,
4184 &iwe, buf);
4185 sprintf(buf, "Path Selection Protocol ID: "
4186 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4187 cfg[4]);
4188 iwe.u.data.length = strlen(buf);
4189 current_ev = iwe_stream_add_point(current_ev, end_buf,
4190 &iwe, buf);
4191 sprintf(buf, "Path Selection Metric ID: "
4192 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4193 cfg[8]);
4194 iwe.u.data.length = strlen(buf);
4195 current_ev = iwe_stream_add_point(current_ev, end_buf,
4196 &iwe, buf);
4197 sprintf(buf, "Congestion Control Mode ID: "
4198 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4199 cfg[11], cfg[12]);
4200 iwe.u.data.length = strlen(buf);
4201 current_ev = iwe_stream_add_point(current_ev, end_buf,
4202 &iwe, buf);
4203 sprintf(buf, "Channel Precedence: "
4204 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4205 cfg[15], cfg[16]);
4206 iwe.u.data.length = strlen(buf);
4207 current_ev = iwe_stream_add_point(current_ev, end_buf,
4208 &iwe, buf);
4209 kfree(buf);
4210 }
4211 }
4212
4213 return current_ev;
4214 }
4215
4216
4217 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4218 {
4219 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4220 char *current_ev = buf;
4221 char *end_buf = buf + len;
4222 struct ieee80211_sta_bss *bss;
4223
4224 spin_lock_bh(&local->sta_bss_lock);
4225 list_for_each_entry(bss, &local->sta_bss_list, list) {
4226 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4227 spin_unlock_bh(&local->sta_bss_lock);
4228 return -E2BIG;
4229 }
4230 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4231 end_buf);
4232 }
4233 spin_unlock_bh(&local->sta_bss_lock);
4234 return current_ev - buf;
4235 }
4236
4237
4238 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4239 {
4240 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4241 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4242 kfree(ifsta->extra_ie);
4243 if (len == 0) {
4244 ifsta->extra_ie = NULL;
4245 ifsta->extra_ie_len = 0;
4246 return 0;
4247 }
4248 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4249 if (!ifsta->extra_ie) {
4250 ifsta->extra_ie_len = 0;
4251 return -ENOMEM;
4252 }
4253 memcpy(ifsta->extra_ie, ie, len);
4254 ifsta->extra_ie_len = len;
4255 return 0;
4256 }
4257
4258
4259 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4260 struct sk_buff *skb, u8 *bssid,
4261 u8 *addr)
4262 {
4263 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4264 struct sta_info *sta;
4265 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4266 DECLARE_MAC_BUF(mac);
4267
4268 /* TODO: Could consider removing the least recently used entry and
4269 * allow new one to be added. */
4270 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4271 if (net_ratelimit()) {
4272 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4273 "entry %s\n", dev->name, print_mac(mac, addr));
4274 }
4275 return NULL;
4276 }
4277
4278 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4279 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4280
4281 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4282 if (!sta)
4283 return NULL;
4284
4285 sta->flags |= WLAN_STA_AUTHORIZED;
4286
4287 sta->supp_rates[local->hw.conf.channel->band] =
4288 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4289
4290 rate_control_rate_init(sta, local);
4291
4292 if (sta_info_insert(sta))
4293 return NULL;
4294
4295 return sta;
4296 }
4297
4298
4299 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4300 {
4301 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4302 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4303
4304 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4305 dev->name, reason);
4306
4307 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4308 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4309 return -EINVAL;
4310
4311 ieee80211_send_deauth(dev, ifsta, reason);
4312 ieee80211_set_disassoc(dev, ifsta, 1);
4313 return 0;
4314 }
4315
4316
4317 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4318 {
4319 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4320 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4321
4322 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4323 dev->name, reason);
4324
4325 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4326 return -EINVAL;
4327
4328 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4329 return -1;
4330
4331 ieee80211_send_disassoc(dev, ifsta, reason);
4332 ieee80211_set_disassoc(dev, ifsta, 0);
4333 return 0;
4334 }
4335
4336 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4337 enum ieee80211_notification_types notif_type)
4338 {
4339 struct ieee80211_local *local = hw_to_local(hw);
4340 struct ieee80211_sub_if_data *sdata;
4341
4342 switch (notif_type) {
4343 case IEEE80211_NOTIFY_RE_ASSOC:
4344 rcu_read_lock();
4345 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4346
4347 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4348 ieee80211_sta_req_auth(sdata->dev,
4349 &sdata->u.sta);
4350 }
4351
4352 }
4353 rcu_read_unlock();
4354 break;
4355 }
4356 }
4357 EXPORT_SYMBOL(ieee80211_notify_mac);
SocketAccessConTroL development