?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
mac80211: send association event on IBSS create
[linux-2.6/sactl.git] / net / mac80211 / mlme.c
blobaf375da9df21d55be750cf4fabb5c01cc2bf18b3
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
734 /* get all rates supported by the device and the AP as
735 * some APs don't like getting a superset of their rates
736 * in the association request (e.g. D-Link DAP 1353 in
737 * b-only mode) */
738 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
739
740 ieee80211_rx_bss_put(dev, bss);
741 } else {
742 rates = ~0;
743 rates_len = sband->n_bitrates;
744 }
745
746 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
747 memset(mgmt, 0, 24);
748 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
749 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
750 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
751
752 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
753 skb_put(skb, 10);
754 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
755 IEEE80211_STYPE_REASSOC_REQ);
756 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
757 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
758 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
759 ETH_ALEN);
760 } else {
761 skb_put(skb, 4);
762 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
763 IEEE80211_STYPE_ASSOC_REQ);
764 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
765 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
766 }
767
768 /* SSID */
769 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
770 *pos++ = WLAN_EID_SSID;
771 *pos++ = ifsta->ssid_len;
772 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
773
774 /* add all rates which were marked to be used above */
775 supp_rates_len = rates_len;
776 if (supp_rates_len > 8)
777 supp_rates_len = 8;
778
779 len = sband->n_bitrates;
780 pos = skb_put(skb, supp_rates_len + 2);
781 *pos++ = WLAN_EID_SUPP_RATES;
782 *pos++ = supp_rates_len;
783
784 count = 0;
785 for (i = 0; i < sband->n_bitrates; i++) {
786 if (BIT(i) & rates) {
787 int rate = sband->bitrates[i].bitrate;
788 *pos++ = (u8) (rate / 5);
789 if (++count == 8)
790 break;
791 }
792 }
793
794 if (count == 8) {
795 pos = skb_put(skb, rates_len - count + 2);
796 *pos++ = WLAN_EID_EXT_SUPP_RATES;
797 *pos++ = rates_len - count;
798
799 for (i++; i < sband->n_bitrates; i++) {
800 if (BIT(i) & rates) {
801 int rate = sband->bitrates[i].bitrate;
802 *pos++ = (u8) (rate / 5);
803 }
804 }
805 }
806
807 if (ifsta->extra_ie) {
808 pos = skb_put(skb, ifsta->extra_ie_len);
809 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
810 }
811
812 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
813 pos = skb_put(skb, 9);
814 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
815 *pos++ = 7; /* len */
816 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
817 *pos++ = 0x50;
818 *pos++ = 0xf2;
819 *pos++ = 2; /* WME */
820 *pos++ = 0; /* WME info */
821 *pos++ = 1; /* WME ver */
822 *pos++ = 0;
823 }
824 /* wmm support is a must to HT */
825 if (wmm && sband->ht_info.ht_supported) {
826 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
827 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
828 *pos++ = WLAN_EID_HT_CAPABILITY;
829 *pos++ = sizeof(struct ieee80211_ht_cap);
830 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
831 memcpy(pos, &tmp, sizeof(u16));
832 pos += sizeof(u16);
833 /* TODO: needs a define here for << 2 */
834 *pos++ = sband->ht_info.ampdu_factor |
835 (sband->ht_info.ampdu_density << 2);
836 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
837 }
838
839 kfree(ifsta->assocreq_ies);
840 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
841 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
842 if (ifsta->assocreq_ies)
843 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
844
845 ieee80211_sta_tx(dev, skb, 0);
846 }
847
848
849 static void ieee80211_send_deauth(struct net_device *dev,
850 struct ieee80211_if_sta *ifsta, u16 reason)
851 {
852 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
853 struct sk_buff *skb;
854 struct ieee80211_mgmt *mgmt;
855
856 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
857 if (!skb) {
858 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
859 "frame\n", dev->name);
860 return;
861 }
862 skb_reserve(skb, local->hw.extra_tx_headroom);
863
864 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
865 memset(mgmt, 0, 24);
866 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
867 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
868 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
869 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
870 IEEE80211_STYPE_DEAUTH);
871 skb_put(skb, 2);
872 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
873
874 ieee80211_sta_tx(dev, skb, 0);
875 }
876
877
878 static void ieee80211_send_disassoc(struct net_device *dev,
879 struct ieee80211_if_sta *ifsta, u16 reason)
880 {
881 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
882 struct sk_buff *skb;
883 struct ieee80211_mgmt *mgmt;
884
885 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
886 if (!skb) {
887 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
888 "frame\n", dev->name);
889 return;
890 }
891 skb_reserve(skb, local->hw.extra_tx_headroom);
892
893 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
894 memset(mgmt, 0, 24);
895 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
896 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
897 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
898 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
899 IEEE80211_STYPE_DISASSOC);
900 skb_put(skb, 2);
901 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
902
903 ieee80211_sta_tx(dev, skb, 0);
904 }
905
906
907 static int ieee80211_privacy_mismatch(struct net_device *dev,
908 struct ieee80211_if_sta *ifsta)
909 {
910 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
911 struct ieee80211_sta_bss *bss;
912 int bss_privacy;
913 int wep_privacy;
914 int privacy_invoked;
915
916 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
917 return 0;
918
919 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
920 local->hw.conf.channel->center_freq,
921 ifsta->ssid, ifsta->ssid_len);
922 if (!bss)
923 return 0;
924
925 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
926 wep_privacy = !!ieee80211_sta_wep_configured(dev);
927 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
928
929 ieee80211_rx_bss_put(dev, bss);
930
931 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
932 return 0;
933
934 return 1;
935 }
936
937
938 static void ieee80211_associate(struct net_device *dev,
939 struct ieee80211_if_sta *ifsta)
940 {
941 DECLARE_MAC_BUF(mac);
942
943 ifsta->assoc_tries++;
944 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
945 printk(KERN_DEBUG "%s: association with AP %s"
946 " timed out\n",
947 dev->name, print_mac(mac, ifsta->bssid));
948 ifsta->state = IEEE80211_DISABLED;
949 return;
950 }
951
952 ifsta->state = IEEE80211_ASSOCIATE;
953 printk(KERN_DEBUG "%s: associate with AP %s\n",
954 dev->name, print_mac(mac, ifsta->bssid));
955 if (ieee80211_privacy_mismatch(dev, ifsta)) {
956 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
957 "mixed-cell disabled - abort association\n", dev->name);
958 ifsta->state = IEEE80211_DISABLED;
959 return;
960 }
961
962 ieee80211_send_assoc(dev, ifsta);
963
964 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
965 }
966
967
968 static void ieee80211_associated(struct net_device *dev,
969 struct ieee80211_if_sta *ifsta)
970 {
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
972 struct sta_info *sta;
973 int disassoc;
974 DECLARE_MAC_BUF(mac);
975
976 /* TODO: start monitoring current AP signal quality and number of
977 * missed beacons. Scan other channels every now and then and search
978 * for better APs. */
979 /* TODO: remove expired BSSes */
980
981 ifsta->state = IEEE80211_ASSOCIATED;
982
983 rcu_read_lock();
984
985 sta = sta_info_get(local, ifsta->bssid);
986 if (!sta) {
987 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
988 dev->name, print_mac(mac, ifsta->bssid));
989 disassoc = 1;
990 } else {
991 disassoc = 0;
992 if (time_after(jiffies,
993 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
994 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
995 printk(KERN_DEBUG "%s: No ProbeResp from "
996 "current AP %s - assume out of "
997 "range\n",
998 dev->name, print_mac(mac, ifsta->bssid));
999 disassoc = 1;
1000 sta_info_unlink(&sta);
1001 } else
1002 ieee80211_send_probe_req(dev, ifsta->bssid,
1003 local->scan_ssid,
1004 local->scan_ssid_len);
1005 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
1006 } else {
1007 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
1008 if (time_after(jiffies, ifsta->last_probe +
1009 IEEE80211_PROBE_INTERVAL)) {
1010 ifsta->last_probe = jiffies;
1011 ieee80211_send_probe_req(dev, ifsta->bssid,
1012 ifsta->ssid,
1013 ifsta->ssid_len);
1014 }
1015 }
1016 }
1017
1018 rcu_read_unlock();
1019
1020 if (disassoc && sta)
1021 sta_info_destroy(sta);
1022
1023 if (disassoc) {
1024 ifsta->state = IEEE80211_DISABLED;
1025 ieee80211_set_associated(dev, ifsta, 0);
1026 } else {
1027 mod_timer(&ifsta->timer, jiffies +
1028 IEEE80211_MONITORING_INTERVAL);
1029 }
1030 }
1031
1032
1033 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
1034 u8 *ssid, size_t ssid_len)
1035 {
1036 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1037 struct ieee80211_supported_band *sband;
1038 struct sk_buff *skb;
1039 struct ieee80211_mgmt *mgmt;
1040 u8 *pos, *supp_rates, *esupp_rates = NULL;
1041 int i;
1042
1043 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
1044 if (!skb) {
1045 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
1046 "request\n", dev->name);
1047 return;
1048 }
1049 skb_reserve(skb, local->hw.extra_tx_headroom);
1050
1051 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1052 memset(mgmt, 0, 24);
1053 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1054 IEEE80211_STYPE_PROBE_REQ);
1055 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1056 if (dst) {
1057 memcpy(mgmt->da, dst, ETH_ALEN);
1058 memcpy(mgmt->bssid, dst, ETH_ALEN);
1059 } else {
1060 memset(mgmt->da, 0xff, ETH_ALEN);
1061 memset(mgmt->bssid, 0xff, ETH_ALEN);
1062 }
1063 pos = skb_put(skb, 2 + ssid_len);
1064 *pos++ = WLAN_EID_SSID;
1065 *pos++ = ssid_len;
1066 memcpy(pos, ssid, ssid_len);
1067
1068 supp_rates = skb_put(skb, 2);
1069 supp_rates[0] = WLAN_EID_SUPP_RATES;
1070 supp_rates[1] = 0;
1071 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1072
1073 for (i = 0; i < sband->n_bitrates; i++) {
1074 struct ieee80211_rate *rate = &sband->bitrates[i];
1075 if (esupp_rates) {
1076 pos = skb_put(skb, 1);
1077 esupp_rates[1]++;
1078 } else if (supp_rates[1] == 8) {
1079 esupp_rates = skb_put(skb, 3);
1080 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1081 esupp_rates[1] = 1;
1082 pos = &esupp_rates[2];
1083 } else {
1084 pos = skb_put(skb, 1);
1085 supp_rates[1]++;
1086 }
1087 *pos = rate->bitrate / 5;
1088 }
1089
1090 ieee80211_sta_tx(dev, skb, 0);
1091 }
1092
1093
1094 static int ieee80211_sta_wep_configured(struct net_device *dev)
1095 {
1096 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1097 if (!sdata || !sdata->default_key ||
1098 sdata->default_key->conf.alg != ALG_WEP)
1099 return 0;
1100 return 1;
1101 }
1102
1103
1104 static void ieee80211_auth_completed(struct net_device *dev,
1105 struct ieee80211_if_sta *ifsta)
1106 {
1107 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1108 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1109 ieee80211_associate(dev, ifsta);
1110 }
1111
1112
1113 static void ieee80211_auth_challenge(struct net_device *dev,
1114 struct ieee80211_if_sta *ifsta,
1115 struct ieee80211_mgmt *mgmt,
1116 size_t len)
1117 {
1118 u8 *pos;
1119 struct ieee802_11_elems elems;
1120
1121 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1122 pos = mgmt->u.auth.variable;
1123 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1124 if (!elems.challenge) {
1125 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1126 "frame\n", dev->name);
1127 return;
1128 }
1129 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1130 elems.challenge_len + 2, 1);
1131 }
1132
1133 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1134 u8 dialog_token, u16 status, u16 policy,
1135 u16 buf_size, u16 timeout)
1136 {
1137 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1138 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1139 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1140 struct sk_buff *skb;
1141 struct ieee80211_mgmt *mgmt;
1142 u16 capab;
1143
1144 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1145 sizeof(mgmt->u.action.u.addba_resp));
1146 if (!skb) {
1147 printk(KERN_DEBUG "%s: failed to allocate buffer "
1148 "for addba resp frame\n", dev->name);
1149 return;
1150 }
1151
1152 skb_reserve(skb, local->hw.extra_tx_headroom);
1153 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1154 memset(mgmt, 0, 24);
1155 memcpy(mgmt->da, da, ETH_ALEN);
1156 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1157 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1158 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1159 else
1160 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1161 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1162 IEEE80211_STYPE_ACTION);
1163
1164 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1165 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1166 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1167 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1168
1169 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1170 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1171 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1172
1173 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1174 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1175 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1176
1177 ieee80211_sta_tx(dev, skb, 0);
1178
1179 return;
1180 }
1181
1182 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1183 u16 tid, u8 dialog_token, u16 start_seq_num,
1184 u16 agg_size, u16 timeout)
1185 {
1186 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1187 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1188 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1189 struct sk_buff *skb;
1190 struct ieee80211_mgmt *mgmt;
1191 u16 capab;
1192
1193 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1194 sizeof(mgmt->u.action.u.addba_req));
1195
1196
1197 if (!skb) {
1198 printk(KERN_ERR "%s: failed to allocate buffer "
1199 "for addba request frame\n", dev->name);
1200 return;
1201 }
1202 skb_reserve(skb, local->hw.extra_tx_headroom);
1203 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1204 memset(mgmt, 0, 24);
1205 memcpy(mgmt->da, da, ETH_ALEN);
1206 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1207 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1208 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1209 else
1210 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1211
1212 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1213 IEEE80211_STYPE_ACTION);
1214
1215 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1216
1217 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1218 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1219
1220 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1221 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1222 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1223 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1224
1225 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1226
1227 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1228 mgmt->u.action.u.addba_req.start_seq_num =
1229 cpu_to_le16(start_seq_num << 4);
1230
1231 ieee80211_sta_tx(dev, skb, 0);
1232 }
1233
1234 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1235 struct ieee80211_mgmt *mgmt,
1236 size_t len)
1237 {
1238 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1239 struct ieee80211_hw *hw = &local->hw;
1240 struct ieee80211_conf *conf = &hw->conf;
1241 struct sta_info *sta;
1242 struct tid_ampdu_rx *tid_agg_rx;
1243 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1244 u8 dialog_token;
1245 int ret = -EOPNOTSUPP;
1246 DECLARE_MAC_BUF(mac);
1247
1248 rcu_read_lock();
1249
1250 sta = sta_info_get(local, mgmt->sa);
1251 if (!sta) {
1252 rcu_read_unlock();
1253 return;
1254 }
1255
1256 /* extract session parameters from addba request frame */
1257 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1258 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1259 start_seq_num =
1260 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1261
1262 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1263 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1264 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1265 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1266
1267 status = WLAN_STATUS_REQUEST_DECLINED;
1268
1269 /* sanity check for incoming parameters:
1270 * check if configuration can support the BA policy
1271 * and if buffer size does not exceeds max value */
1272 if (((ba_policy != 1)
1273 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1274 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1275 status = WLAN_STATUS_INVALID_QOS_PARAM;
1276 #ifdef CONFIG_MAC80211_HT_DEBUG
1277 if (net_ratelimit())
1278 printk(KERN_DEBUG "AddBA Req with bad params from "
1279 "%s on tid %u. policy %d, buffer size %d\n",
1280 print_mac(mac, mgmt->sa), tid, ba_policy,
1281 buf_size);
1282 #endif /* CONFIG_MAC80211_HT_DEBUG */
1283 goto end_no_lock;
1284 }
1285 /* determine default buffer size */
1286 if (buf_size == 0) {
1287 struct ieee80211_supported_band *sband;
1288
1289 sband = local->hw.wiphy->bands[conf->channel->band];
1290 buf_size = IEEE80211_MIN_AMPDU_BUF;
1291 buf_size = buf_size << sband->ht_info.ampdu_factor;
1292 }
1293
1294
1295 /* examine state machine */
1296 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1297
1298 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1299 #ifdef CONFIG_MAC80211_HT_DEBUG
1300 if (net_ratelimit())
1301 printk(KERN_DEBUG "unexpected AddBA Req from "
1302 "%s on tid %u\n",
1303 print_mac(mac, mgmt->sa), tid);
1304 #endif /* CONFIG_MAC80211_HT_DEBUG */
1305 goto end;
1306 }
1307
1308 /* prepare A-MPDU MLME for Rx aggregation */
1309 sta->ampdu_mlme.tid_rx[tid] =
1310 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1311 if (!sta->ampdu_mlme.tid_rx[tid]) {
1312 if (net_ratelimit())
1313 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1314 tid);
1315 goto end;
1316 }
1317 /* rx timer */
1318 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1319 sta_rx_agg_session_timer_expired;
1320 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1321 (unsigned long)&sta->timer_to_tid[tid];
1322 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1323
1324 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1325
1326 /* prepare reordering buffer */
1327 tid_agg_rx->reorder_buf =
1328 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
1329 if (!tid_agg_rx->reorder_buf) {
1330 if (net_ratelimit())
1331 printk(KERN_ERR "can not allocate reordering buffer "
1332 "to tid %d\n", tid);
1333 kfree(sta->ampdu_mlme.tid_rx[tid]);
1334 goto end;
1335 }
1336 memset(tid_agg_rx->reorder_buf, 0,
1337 buf_size * sizeof(struct sk_buff *));
1338
1339 if (local->ops->ampdu_action)
1340 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1341 sta->addr, tid, &start_seq_num);
1342 #ifdef CONFIG_MAC80211_HT_DEBUG
1343 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
1344 #endif /* CONFIG_MAC80211_HT_DEBUG */
1345
1346 if (ret) {
1347 kfree(tid_agg_rx->reorder_buf);
1348 kfree(tid_agg_rx);
1349 sta->ampdu_mlme.tid_rx[tid] = NULL;
1350 goto end;
1351 }
1352
1353 /* change state and send addba resp */
1354 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1355 tid_agg_rx->dialog_token = dialog_token;
1356 tid_agg_rx->ssn = start_seq_num;
1357 tid_agg_rx->head_seq_num = start_seq_num;
1358 tid_agg_rx->buf_size = buf_size;
1359 tid_agg_rx->timeout = timeout;
1360 tid_agg_rx->stored_mpdu_num = 0;
1361 status = WLAN_STATUS_SUCCESS;
1362 end:
1363 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1364
1365 end_no_lock:
1366 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1367 dialog_token, status, 1, buf_size, timeout);
1368 rcu_read_unlock();
1369 }
1370
1371 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1372 struct ieee80211_mgmt *mgmt,
1373 size_t len)
1374 {
1375 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1376 struct ieee80211_hw *hw = &local->hw;
1377 struct sta_info *sta;
1378 u16 capab;
1379 u16 tid;
1380 u8 *state;
1381
1382 rcu_read_lock();
1383
1384 sta = sta_info_get(local, mgmt->sa);
1385 if (!sta) {
1386 rcu_read_unlock();
1387 return;
1388 }
1389
1390 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1391 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1392
1393 state = &sta->ampdu_mlme.tid_state_tx[tid];
1394
1395 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1396
1397 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1398 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1399 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1400 "%d\n", *state);
1401 goto addba_resp_exit;
1402 }
1403
1404 if (mgmt->u.action.u.addba_resp.dialog_token !=
1405 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1406 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1407 #ifdef CONFIG_MAC80211_HT_DEBUG
1408 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1409 #endif /* CONFIG_MAC80211_HT_DEBUG */
1410 goto addba_resp_exit;
1411 }
1412
1413 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1414 #ifdef CONFIG_MAC80211_HT_DEBUG
1415 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1416 #endif /* CONFIG_MAC80211_HT_DEBUG */
1417 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1418 == WLAN_STATUS_SUCCESS) {
1419 if (*state & HT_ADDBA_RECEIVED_MSK)
1420 printk(KERN_DEBUG "double addBA response\n");
1421
1422 *state |= HT_ADDBA_RECEIVED_MSK;
1423 sta->ampdu_mlme.addba_req_num[tid] = 0;
1424
1425 if (*state == HT_AGG_STATE_OPERATIONAL) {
1426 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1427 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1428 }
1429
1430 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1431 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1432 } else {
1433 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1434
1435 sta->ampdu_mlme.addba_req_num[tid]++;
1436 /* this will allow the state check in stop_BA_session */
1437 *state = HT_AGG_STATE_OPERATIONAL;
1438 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1439 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1440 WLAN_BACK_INITIATOR);
1441 }
1442
1443 addba_resp_exit:
1444 rcu_read_unlock();
1445 }
1446
1447 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1448 u16 initiator, u16 reason_code)
1449 {
1450 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1451 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1452 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1453 struct sk_buff *skb;
1454 struct ieee80211_mgmt *mgmt;
1455 u16 params;
1456
1457 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1458 sizeof(mgmt->u.action.u.delba));
1459
1460 if (!skb) {
1461 printk(KERN_ERR "%s: failed to allocate buffer "
1462 "for delba frame\n", dev->name);
1463 return;
1464 }
1465
1466 skb_reserve(skb, local->hw.extra_tx_headroom);
1467 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1468 memset(mgmt, 0, 24);
1469 memcpy(mgmt->da, da, ETH_ALEN);
1470 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1471 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1472 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1473 else
1474 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1475 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1476 IEEE80211_STYPE_ACTION);
1477
1478 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1479
1480 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1481 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1482 params = (u16)(initiator << 11); /* bit 11 initiator */
1483 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1484
1485 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1486 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1487
1488 ieee80211_sta_tx(dev, skb, 0);
1489 }
1490
1491 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1492 u16 initiator, u16 reason)
1493 {
1494 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1495 struct ieee80211_hw *hw = &local->hw;
1496 struct sta_info *sta;
1497 int ret, i;
1498 DECLARE_MAC_BUF(mac);
1499
1500 rcu_read_lock();
1501
1502 sta = sta_info_get(local, ra);
1503 if (!sta) {
1504 rcu_read_unlock();
1505 return;
1506 }
1507
1508 /* check if TID is in operational state */
1509 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1510 if (sta->ampdu_mlme.tid_state_rx[tid]
1511 != HT_AGG_STATE_OPERATIONAL) {
1512 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1513 rcu_read_unlock();
1514 return;
1515 }
1516 sta->ampdu_mlme.tid_state_rx[tid] =
1517 HT_AGG_STATE_REQ_STOP_BA_MSK |
1518 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1519 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1520
1521 /* stop HW Rx aggregation. ampdu_action existence
1522 * already verified in session init so we add the BUG_ON */
1523 BUG_ON(!local->ops->ampdu_action);
1524
1525 #ifdef CONFIG_MAC80211_HT_DEBUG
1526 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1527 print_mac(mac, ra), tid);
1528 #endif /* CONFIG_MAC80211_HT_DEBUG */
1529
1530 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1531 ra, tid, NULL);
1532 if (ret)
1533 printk(KERN_DEBUG "HW problem - can not stop rx "
1534 "aggergation for tid %d\n", tid);
1535
1536 /* shutdown timer has not expired */
1537 if (initiator != WLAN_BACK_TIMER)
1538 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1539
1540 /* check if this is a self generated aggregation halt */
1541 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1542 ieee80211_send_delba(dev, ra, tid, 0, reason);
1543
1544 /* free the reordering buffer */
1545 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1546 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1547 /* release the reordered frames */
1548 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1549 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1550 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1551 }
1552 }
1553 /* free resources */
1554 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1555 kfree(sta->ampdu_mlme.tid_rx[tid]);
1556 sta->ampdu_mlme.tid_rx[tid] = NULL;
1557 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1558
1559 rcu_read_unlock();
1560 }
1561
1562
1563 static void ieee80211_sta_process_delba(struct net_device *dev,
1564 struct ieee80211_mgmt *mgmt, size_t len)
1565 {
1566 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1567 struct sta_info *sta;
1568 u16 tid, params;
1569 u16 initiator;
1570 DECLARE_MAC_BUF(mac);
1571
1572 rcu_read_lock();
1573
1574 sta = sta_info_get(local, mgmt->sa);
1575 if (!sta) {
1576 rcu_read_unlock();
1577 return;
1578 }
1579
1580 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1581 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1582 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1583
1584 #ifdef CONFIG_MAC80211_HT_DEBUG
1585 if (net_ratelimit())
1586 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1587 print_mac(mac, mgmt->sa),
1588 initiator ? "initiator" : "recipient", tid,
1589 mgmt->u.action.u.delba.reason_code);
1590 #endif /* CONFIG_MAC80211_HT_DEBUG */
1591
1592 if (initiator == WLAN_BACK_INITIATOR)
1593 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1594 WLAN_BACK_INITIATOR, 0);
1595 else { /* WLAN_BACK_RECIPIENT */
1596 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1597 sta->ampdu_mlme.tid_state_tx[tid] =
1598 HT_AGG_STATE_OPERATIONAL;
1599 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1600 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1601 WLAN_BACK_RECIPIENT);
1602 }
1603 rcu_read_unlock();
1604 }
1605
1606 /*
1607 * After sending add Block Ack request we activated a timer until
1608 * add Block Ack response will arrive from the recipient.
1609 * If this timer expires sta_addba_resp_timer_expired will be executed.
1610 */
1611 void sta_addba_resp_timer_expired(unsigned long data)
1612 {
1613 /* not an elegant detour, but there is no choice as the timer passes
1614 * only one argument, and both sta_info and TID are needed, so init
1615 * flow in sta_info_create gives the TID as data, while the timer_to_id
1616 * array gives the sta through container_of */
1617 u16 tid = *(u8 *)data;
1618 struct sta_info *temp_sta = container_of((void *)data,
1619 struct sta_info, timer_to_tid[tid]);
1620
1621 struct ieee80211_local *local = temp_sta->local;
1622 struct ieee80211_hw *hw = &local->hw;
1623 struct sta_info *sta;
1624 u8 *state;
1625
1626 rcu_read_lock();
1627
1628 sta = sta_info_get(local, temp_sta->addr);
1629 if (!sta) {
1630 rcu_read_unlock();
1631 return;
1632 }
1633
1634 state = &sta->ampdu_mlme.tid_state_tx[tid];
1635 /* check if the TID waits for addBA response */
1636 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1637 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1638 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1639 *state = HT_AGG_STATE_IDLE;
1640 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1641 "expecting addBA response there", tid);
1642 goto timer_expired_exit;
1643 }
1644
1645 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1646
1647 /* go through the state check in stop_BA_session */
1648 *state = HT_AGG_STATE_OPERATIONAL;
1649 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1650 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1651 WLAN_BACK_INITIATOR);
1652
1653 timer_expired_exit:
1654 rcu_read_unlock();
1655 }
1656
1657 /*
1658 * After accepting the AddBA Request we activated a timer,
1659 * resetting it after each frame that arrives from the originator.
1660 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1661 */
1662 void sta_rx_agg_session_timer_expired(unsigned long data)
1663 {
1664 /* not an elegant detour, but there is no choice as the timer passes
1665 * only one argument, and various sta_info are needed here, so init
1666 * flow in sta_info_create gives the TID as data, while the timer_to_id
1667 * array gives the sta through container_of */
1668 u8 *ptid = (u8 *)data;
1669 u8 *timer_to_id = ptid - *ptid;
1670 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1671 timer_to_tid[0]);
1672
1673 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1674 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1675 (u16)*ptid, WLAN_BACK_TIMER,
1676 WLAN_REASON_QSTA_TIMEOUT);
1677 }
1678
1679 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1680 {
1681 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1682 int i;
1683
1684 for (i = 0; i < STA_TID_NUM; i++) {
1685 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1686 WLAN_BACK_INITIATOR);
1687 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1688 WLAN_BACK_RECIPIENT,
1689 WLAN_REASON_QSTA_LEAVE_QBSS);
1690 }
1691 }
1692
1693 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1694 struct ieee80211_if_sta *ifsta,
1695 struct ieee80211_mgmt *mgmt,
1696 size_t len)
1697 {
1698 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1699 u16 auth_alg, auth_transaction, status_code;
1700 DECLARE_MAC_BUF(mac);
1701
1702 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1703 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1704 printk(KERN_DEBUG "%s: authentication frame received from "
1705 "%s, but not in authenticate state - ignored\n",
1706 dev->name, print_mac(mac, mgmt->sa));
1707 return;
1708 }
1709
1710 if (len < 24 + 6) {
1711 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1712 "received from %s - ignored\n",
1713 dev->name, len, print_mac(mac, mgmt->sa));
1714 return;
1715 }
1716
1717 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1718 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1719 printk(KERN_DEBUG "%s: authentication frame received from "
1720 "unknown AP (SA=%s BSSID=%s) - "
1721 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1722 print_mac(mac, mgmt->bssid));
1723 return;
1724 }
1725
1726 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1727 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1728 printk(KERN_DEBUG "%s: authentication frame received from "
1729 "unknown BSSID (SA=%s BSSID=%s) - "
1730 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1731 print_mac(mac, mgmt->bssid));
1732 return;
1733 }
1734
1735 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1736 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1737 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1738
1739 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1740 "transaction=%d status=%d)\n",
1741 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1742 auth_transaction, status_code);
1743
1744 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1745 /* IEEE 802.11 standard does not require authentication in IBSS
1746 * networks and most implementations do not seem to use it.
1747 * However, try to reply to authentication attempts if someone
1748 * has actually implemented this.
1749 * TODO: Could implement shared key authentication. */
1750 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1751 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1752 "frame (alg=%d transaction=%d)\n",
1753 dev->name, auth_alg, auth_transaction);
1754 return;
1755 }
1756 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1757 }
1758
1759 if (auth_alg != ifsta->auth_alg ||
1760 auth_transaction != ifsta->auth_transaction) {
1761 printk(KERN_DEBUG "%s: unexpected authentication frame "
1762 "(alg=%d transaction=%d)\n",
1763 dev->name, auth_alg, auth_transaction);
1764 return;
1765 }
1766
1767 if (status_code != WLAN_STATUS_SUCCESS) {
1768 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1769 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1770 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1771 u8 algs[3];
1772 const int num_algs = ARRAY_SIZE(algs);
1773 int i, pos;
1774 algs[0] = algs[1] = algs[2] = 0xff;
1775 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1776 algs[0] = WLAN_AUTH_OPEN;
1777 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1778 algs[1] = WLAN_AUTH_SHARED_KEY;
1779 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1780 algs[2] = WLAN_AUTH_LEAP;
1781 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1782 pos = 0;
1783 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1784 pos = 1;
1785 else
1786 pos = 2;
1787 for (i = 0; i < num_algs; i++) {
1788 pos++;
1789 if (pos >= num_algs)
1790 pos = 0;
1791 if (algs[pos] == ifsta->auth_alg ||
1792 algs[pos] == 0xff)
1793 continue;
1794 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1795 !ieee80211_sta_wep_configured(dev))
1796 continue;
1797 ifsta->auth_alg = algs[pos];
1798 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1799 "next try\n",
1800 dev->name, ifsta->auth_alg);
1801 break;
1802 }
1803 }
1804 return;
1805 }
1806
1807 switch (ifsta->auth_alg) {
1808 case WLAN_AUTH_OPEN:
1809 case WLAN_AUTH_LEAP:
1810 ieee80211_auth_completed(dev, ifsta);
1811 break;
1812 case WLAN_AUTH_SHARED_KEY:
1813 if (ifsta->auth_transaction == 4)
1814 ieee80211_auth_completed(dev, ifsta);
1815 else
1816 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1817 break;
1818 }
1819 }
1820
1821
1822 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1823 struct ieee80211_if_sta *ifsta,
1824 struct ieee80211_mgmt *mgmt,
1825 size_t len)
1826 {
1827 u16 reason_code;
1828 DECLARE_MAC_BUF(mac);
1829
1830 if (len < 24 + 2) {
1831 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1832 "received from %s - ignored\n",
1833 dev->name, len, print_mac(mac, mgmt->sa));
1834 return;
1835 }
1836
1837 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1838 printk(KERN_DEBUG "%s: deauthentication frame received from "
1839 "unknown AP (SA=%s BSSID=%s) - "
1840 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1841 print_mac(mac, mgmt->bssid));
1842 return;
1843 }
1844
1845 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1846
1847 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1848 " (reason=%d)\n",
1849 dev->name, print_mac(mac, mgmt->sa), reason_code);
1850
1851 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1852 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1853 }
1854
1855 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1856 ifsta->state == IEEE80211_ASSOCIATE ||
1857 ifsta->state == IEEE80211_ASSOCIATED) {
1858 ifsta->state = IEEE80211_AUTHENTICATE;
1859 mod_timer(&ifsta->timer, jiffies +
1860 IEEE80211_RETRY_AUTH_INTERVAL);
1861 }
1862
1863 ieee80211_set_disassoc(dev, ifsta, 1);
1864 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1865 }
1866
1867
1868 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1869 struct ieee80211_if_sta *ifsta,
1870 struct ieee80211_mgmt *mgmt,
1871 size_t len)
1872 {
1873 u16 reason_code;
1874 DECLARE_MAC_BUF(mac);
1875
1876 if (len < 24 + 2) {
1877 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1878 "received from %s - ignored\n",
1879 dev->name, len, print_mac(mac, mgmt->sa));
1880 return;
1881 }
1882
1883 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1884 printk(KERN_DEBUG "%s: disassociation frame received from "
1885 "unknown AP (SA=%s BSSID=%s) - "
1886 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1887 print_mac(mac, mgmt->bssid));
1888 return;
1889 }
1890
1891 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1892
1893 printk(KERN_DEBUG "%s: RX disassociation from %s"
1894 " (reason=%d)\n",
1895 dev->name, print_mac(mac, mgmt->sa), reason_code);
1896
1897 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1898 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1899
1900 if (ifsta->state == IEEE80211_ASSOCIATED) {
1901 ifsta->state = IEEE80211_ASSOCIATE;
1902 mod_timer(&ifsta->timer, jiffies +
1903 IEEE80211_RETRY_AUTH_INTERVAL);
1904 }
1905
1906 ieee80211_set_disassoc(dev, ifsta, 0);
1907 }
1908
1909
1910 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1911 struct ieee80211_if_sta *ifsta,
1912 struct ieee80211_mgmt *mgmt,
1913 size_t len,
1914 int reassoc)
1915 {
1916 struct ieee80211_local *local = sdata->local;
1917 struct net_device *dev = sdata->dev;
1918 struct ieee80211_supported_band *sband;
1919 struct sta_info *sta;
1920 u64 rates, basic_rates;
1921 u16 capab_info, status_code, aid;
1922 struct ieee802_11_elems elems;
1923 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1924 u8 *pos;
1925 int i, j;
1926 DECLARE_MAC_BUF(mac);
1927 bool have_higher_than_11mbit = false;
1928
1929 /* AssocResp and ReassocResp have identical structure, so process both
1930 * of them in this function. */
1931
1932 if (ifsta->state != IEEE80211_ASSOCIATE) {
1933 printk(KERN_DEBUG "%s: association frame received from "
1934 "%s, but not in associate state - ignored\n",
1935 dev->name, print_mac(mac, mgmt->sa));
1936 return;
1937 }
1938
1939 if (len < 24 + 6) {
1940 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1941 "received from %s - ignored\n",
1942 dev->name, len, print_mac(mac, mgmt->sa));
1943 return;
1944 }
1945
1946 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1947 printk(KERN_DEBUG "%s: association frame received from "
1948 "unknown AP (SA=%s BSSID=%s) - "
1949 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1950 print_mac(mac, mgmt->bssid));
1951 return;
1952 }
1953
1954 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1955 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1956 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1957
1958 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1959 "status=%d aid=%d)\n",
1960 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1961 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1962
1963 if (status_code != WLAN_STATUS_SUCCESS) {
1964 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1965 dev->name, status_code);
1966 /* if this was a reassociation, ensure we try a "full"
1967 * association next time. This works around some broken APs
1968 * which do not correctly reject reassociation requests. */
1969 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1970 return;
1971 }
1972
1973 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1974 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1975 "set\n", dev->name, aid);
1976 aid &= ~(BIT(15) | BIT(14));
1977
1978 pos = mgmt->u.assoc_resp.variable;
1979 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1980
1981 if (!elems.supp_rates) {
1982 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1983 dev->name);
1984 return;
1985 }
1986
1987 printk(KERN_DEBUG "%s: associated\n", dev->name);
1988 ifsta->aid = aid;
1989 ifsta->ap_capab = capab_info;
1990
1991 kfree(ifsta->assocresp_ies);
1992 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1993 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1994 if (ifsta->assocresp_ies)
1995 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1996
1997 rcu_read_lock();
1998
1999 /* Add STA entry for the AP */
2000 sta = sta_info_get(local, ifsta->bssid);
2001 if (!sta) {
2002 struct ieee80211_sta_bss *bss;
2003 int err;
2004
2005 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2006 if (!sta) {
2007 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
2008 " the AP\n", dev->name);
2009 rcu_read_unlock();
2010 return;
2011 }
2012 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
2013 local->hw.conf.channel->center_freq,
2014 ifsta->ssid, ifsta->ssid_len);
2015 if (bss) {
2016 sta->last_rssi = bss->rssi;
2017 sta->last_signal = bss->signal;
2018 sta->last_noise = bss->noise;
2019 ieee80211_rx_bss_put(dev, bss);
2020 }
2021
2022 err = sta_info_insert(sta);
2023 if (err) {
2024 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2025 " the AP (error %d)\n", dev->name, err);
2026 rcu_read_unlock();
2027 return;
2028 }
2029 }
2030
2031 /*
2032 * FIXME: Do we really need to update the sta_info's information here?
2033 * We already know about the AP (we found it in our list) so it
2034 * should already be filled with the right info, no?
2035 * As is stands, all this is racy because typically we assume
2036 * the information that is filled in here (except flags) doesn't
2037 * change while a STA structure is alive. As such, it should move
2038 * to between the sta_info_alloc() and sta_info_insert() above.
2039 */
2040
2041 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2042 WLAN_STA_AUTHORIZED;
2043
2044 rates = 0;
2045 basic_rates = 0;
2046 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2047
2048 for (i = 0; i < elems.supp_rates_len; i++) {
2049 int rate = (elems.supp_rates[i] & 0x7f) * 5;
2050
2051 if (rate > 110)
2052 have_higher_than_11mbit = true;
2053
2054 for (j = 0; j < sband->n_bitrates; j++) {
2055 if (sband->bitrates[j].bitrate == rate)
2056 rates |= BIT(j);
2057 if (elems.supp_rates[i] & 0x80)
2058 basic_rates |= BIT(j);
2059 }
2060 }
2061
2062 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2063 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
2064
2065 if (rate > 110)
2066 have_higher_than_11mbit = true;
2067
2068 for (j = 0; j < sband->n_bitrates; j++) {
2069 if (sband->bitrates[j].bitrate == rate)
2070 rates |= BIT(j);
2071 if (elems.ext_supp_rates[i] & 0x80)
2072 basic_rates |= BIT(j);
2073 }
2074 }
2075
2076 sta->supp_rates[local->hw.conf.channel->band] = rates;
2077 sdata->basic_rates = basic_rates;
2078
2079 /* cf. IEEE 802.11 9.2.12 */
2080 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2081 have_higher_than_11mbit)
2082 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2083 else
2084 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2085
2086 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
2087 struct ieee80211_ht_bss_info bss_info;
2088 ieee80211_ht_cap_ie_to_ht_info(
2089 (struct ieee80211_ht_cap *)
2090 elems.ht_cap_elem, &sta->ht_info);
2091 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2092 (struct ieee80211_ht_addt_info *)
2093 elems.ht_info_elem, &bss_info);
2094 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2095 }
2096
2097 rate_control_rate_init(sta, local);
2098
2099 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2100 sta->flags |= WLAN_STA_WME;
2101 rcu_read_unlock();
2102 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2103 elems.wmm_param_len);
2104 } else
2105 rcu_read_unlock();
2106
2107 /* set AID and assoc capability,
2108 * ieee80211_set_associated() will tell the driver */
2109 bss_conf->aid = aid;
2110 bss_conf->assoc_capability = capab_info;
2111 ieee80211_set_associated(dev, ifsta, 1);
2112
2113 ieee80211_associated(dev, ifsta);
2114 }
2115
2116
2117 /* Caller must hold local->sta_bss_lock */
2118 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2119 struct ieee80211_sta_bss *bss)
2120 {
2121 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2122 u8 hash_idx;
2123
2124 if (bss_mesh_cfg(bss))
2125 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2126 bss_mesh_id_len(bss));
2127 else
2128 hash_idx = STA_HASH(bss->bssid);
2129
2130 bss->hnext = local->sta_bss_hash[hash_idx];
2131 local->sta_bss_hash[hash_idx] = bss;
2132 }
2133
2134
2135 /* Caller must hold local->sta_bss_lock */
2136 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2137 struct ieee80211_sta_bss *bss)
2138 {
2139 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2140 struct ieee80211_sta_bss *b, *prev = NULL;
2141 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2142 while (b) {
2143 if (b == bss) {
2144 if (!prev)
2145 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2146 bss->hnext;
2147 else
2148 prev->hnext = bss->hnext;
2149 break;
2150 }
2151 prev = b;
2152 b = b->hnext;
2153 }
2154 }
2155
2156
2157 static struct ieee80211_sta_bss *
2158 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2159 u8 *ssid, u8 ssid_len)
2160 {
2161 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2162 struct ieee80211_sta_bss *bss;
2163
2164 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2165 if (!bss)
2166 return NULL;
2167 atomic_inc(&bss->users);
2168 atomic_inc(&bss->users);
2169 memcpy(bss->bssid, bssid, ETH_ALEN);
2170 bss->freq = freq;
2171 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2172 memcpy(bss->ssid, ssid, ssid_len);
2173 bss->ssid_len = ssid_len;
2174 }
2175
2176 spin_lock_bh(&local->sta_bss_lock);
2177 /* TODO: order by RSSI? */
2178 list_add_tail(&bss->list, &local->sta_bss_list);
2179 __ieee80211_rx_bss_hash_add(dev, bss);
2180 spin_unlock_bh(&local->sta_bss_lock);
2181 return bss;
2182 }
2183
2184 static struct ieee80211_sta_bss *
2185 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2186 u8 *ssid, u8 ssid_len)
2187 {
2188 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2189 struct ieee80211_sta_bss *bss;
2190
2191 spin_lock_bh(&local->sta_bss_lock);
2192 bss = local->sta_bss_hash[STA_HASH(bssid)];
2193 while (bss) {
2194 if (!bss_mesh_cfg(bss) &&
2195 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2196 bss->freq == freq &&
2197 bss->ssid_len == ssid_len &&
2198 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2199 atomic_inc(&bss->users);
2200 break;
2201 }
2202 bss = bss->hnext;
2203 }
2204 spin_unlock_bh(&local->sta_bss_lock);
2205 return bss;
2206 }
2207
2208 #ifdef CONFIG_MAC80211_MESH
2209 static struct ieee80211_sta_bss *
2210 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2211 u8 *mesh_cfg, int freq)
2212 {
2213 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2214 struct ieee80211_sta_bss *bss;
2215
2216 spin_lock_bh(&local->sta_bss_lock);
2217 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2218 while (bss) {
2219 if (bss_mesh_cfg(bss) &&
2220 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2221 bss->freq == freq &&
2222 mesh_id_len == bss->mesh_id_len &&
2223 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2224 mesh_id_len))) {
2225 atomic_inc(&bss->users);
2226 break;
2227 }
2228 bss = bss->hnext;
2229 }
2230 spin_unlock_bh(&local->sta_bss_lock);
2231 return bss;
2232 }
2233
2234 static struct ieee80211_sta_bss *
2235 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2236 u8 *mesh_cfg, int mesh_config_len, int freq)
2237 {
2238 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2239 struct ieee80211_sta_bss *bss;
2240
2241 if (mesh_config_len != MESH_CFG_LEN)
2242 return NULL;
2243
2244 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2245 if (!bss)
2246 return NULL;
2247
2248 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2249 if (!bss->mesh_cfg) {
2250 kfree(bss);
2251 return NULL;
2252 }
2253
2254 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2255 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2256 if (!bss->mesh_id) {
2257 kfree(bss->mesh_cfg);
2258 kfree(bss);
2259 return NULL;
2260 }
2261 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2262 }
2263
2264 atomic_inc(&bss->users);
2265 atomic_inc(&bss->users);
2266 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2267 bss->mesh_id_len = mesh_id_len;
2268 bss->freq = freq;
2269 spin_lock_bh(&local->sta_bss_lock);
2270 /* TODO: order by RSSI? */
2271 list_add_tail(&bss->list, &local->sta_bss_list);
2272 __ieee80211_rx_bss_hash_add(dev, bss);
2273 spin_unlock_bh(&local->sta_bss_lock);
2274 return bss;
2275 }
2276 #endif
2277
2278 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2279 {
2280 kfree(bss->wpa_ie);
2281 kfree(bss->rsn_ie);
2282 kfree(bss->wmm_ie);
2283 kfree(bss->ht_ie);
2284 kfree(bss_mesh_id(bss));
2285 kfree(bss_mesh_cfg(bss));
2286 kfree(bss);
2287 }
2288
2289
2290 static void ieee80211_rx_bss_put(struct net_device *dev,
2291 struct ieee80211_sta_bss *bss)
2292 {
2293 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2294
2295 local_bh_disable();
2296 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
2297 local_bh_enable();
2298 return;
2299 }
2300
2301 __ieee80211_rx_bss_hash_del(dev, bss);
2302 list_del(&bss->list);
2303 spin_unlock_bh(&local->sta_bss_lock);
2304 ieee80211_rx_bss_free(bss);
2305 }
2306
2307
2308 void ieee80211_rx_bss_list_init(struct net_device *dev)
2309 {
2310 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2311 spin_lock_init(&local->sta_bss_lock);
2312 INIT_LIST_HEAD(&local->sta_bss_list);
2313 }
2314
2315
2316 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2317 {
2318 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2319 struct ieee80211_sta_bss *bss, *tmp;
2320
2321 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2322 ieee80211_rx_bss_put(dev, bss);
2323 }
2324
2325
2326 static int ieee80211_sta_join_ibss(struct net_device *dev,
2327 struct ieee80211_if_sta *ifsta,
2328 struct ieee80211_sta_bss *bss)
2329 {
2330 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2331 int res, rates, i, j;
2332 struct sk_buff *skb;
2333 struct ieee80211_mgmt *mgmt;
2334 struct ieee80211_tx_control control;
2335 struct rate_selection ratesel;
2336 u8 *pos;
2337 struct ieee80211_sub_if_data *sdata;
2338 struct ieee80211_supported_band *sband;
2339 union iwreq_data wrqu;
2340
2341 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2342
2343 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2344
2345 /* Remove possible STA entries from other IBSS networks. */
2346 sta_info_flush_delayed(sdata);
2347
2348 if (local->ops->reset_tsf) {
2349 /* Reset own TSF to allow time synchronization work. */
2350 local->ops->reset_tsf(local_to_hw(local));
2351 }
2352 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2353 res = ieee80211_if_config(dev);
2354 if (res)
2355 return res;
2356
2357 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2358
2359 sdata->drop_unencrypted = bss->capability &
2360 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2361
2362 res = ieee80211_set_freq(local, bss->freq);
2363
2364 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2365 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2366 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2367 return -1;
2368 }
2369
2370 /* Set beacon template */
2371 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2372 do {
2373 if (!skb)
2374 break;
2375
2376 skb_reserve(skb, local->hw.extra_tx_headroom);
2377
2378 mgmt = (struct ieee80211_mgmt *)
2379 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2380 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2381 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2382 IEEE80211_STYPE_BEACON);
2383 memset(mgmt->da, 0xff, ETH_ALEN);
2384 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2385 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2386 mgmt->u.beacon.beacon_int =
2387 cpu_to_le16(local->hw.conf.beacon_int);
2388 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2389
2390 pos = skb_put(skb, 2 + ifsta->ssid_len);
2391 *pos++ = WLAN_EID_SSID;
2392 *pos++ = ifsta->ssid_len;
2393 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2394
2395 rates = bss->supp_rates_len;
2396 if (rates > 8)
2397 rates = 8;
2398 pos = skb_put(skb, 2 + rates);
2399 *pos++ = WLAN_EID_SUPP_RATES;
2400 *pos++ = rates;
2401 memcpy(pos, bss->supp_rates, rates);
2402
2403 if (bss->band == IEEE80211_BAND_2GHZ) {
2404 pos = skb_put(skb, 2 + 1);
2405 *pos++ = WLAN_EID_DS_PARAMS;
2406 *pos++ = 1;
2407 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2408 }
2409
2410 pos = skb_put(skb, 2 + 2);
2411 *pos++ = WLAN_EID_IBSS_PARAMS;
2412 *pos++ = 2;
2413 /* FIX: set ATIM window based on scan results */
2414 *pos++ = 0;
2415 *pos++ = 0;
2416
2417 if (bss->supp_rates_len > 8) {
2418 rates = bss->supp_rates_len - 8;
2419 pos = skb_put(skb, 2 + rates);
2420 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2421 *pos++ = rates;
2422 memcpy(pos, &bss->supp_rates[8], rates);
2423 }
2424
2425 memset(&control, 0, sizeof(control));
2426 rate_control_get_rate(dev, sband, skb, &ratesel);
2427 if (!ratesel.rate) {
2428 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2429 "for IBSS beacon\n", dev->name);
2430 break;
2431 }
2432 control.vif = &sdata->vif;
2433 control.tx_rate = ratesel.rate;
2434 if (sdata->bss_conf.use_short_preamble &&
2435 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2436 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2437 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2438 control.flags |= IEEE80211_TXCTL_NO_ACK;
2439 control.retry_limit = 1;
2440
2441 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2442 if (ifsta->probe_resp) {
2443 mgmt = (struct ieee80211_mgmt *)
2444 ifsta->probe_resp->data;
2445 mgmt->frame_control =
2446 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2447 IEEE80211_STYPE_PROBE_RESP);
2448 } else {
2449 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2450 "template for IBSS\n", dev->name);
2451 }
2452
2453 if (local->ops->beacon_update &&
2454 local->ops->beacon_update(local_to_hw(local),
2455 skb, &control) == 0) {
2456 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2457 "template\n", dev->name);
2458 skb = NULL;
2459 }
2460
2461 rates = 0;
2462 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2463 for (i = 0; i < bss->supp_rates_len; i++) {
2464 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2465 for (j = 0; j < sband->n_bitrates; j++)
2466 if (sband->bitrates[j].bitrate == bitrate)
2467 rates |= BIT(j);
2468 }
2469 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2470
2471 ieee80211_sta_def_wmm_params(dev, bss, 1);
2472 } while (0);
2473
2474 if (skb) {
2475 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2476 "template\n", dev->name);
2477 dev_kfree_skb(skb);
2478 }
2479
2480 ifsta->state = IEEE80211_IBSS_JOINED;
2481 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2482
2483 memset(&wrqu, 0, sizeof(wrqu));
2484 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
2485 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
2486
2487 return res;
2488 }
2489
2490 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2491 struct ieee802_11_elems *elems,
2492 enum ieee80211_band band)
2493 {
2494 struct ieee80211_supported_band *sband;
2495 struct ieee80211_rate *bitrates;
2496 size_t num_rates;
2497 u64 supp_rates;
2498 int i, j;
2499 sband = local->hw.wiphy->bands[band];
2500
2501 if (!sband) {
2502 WARN_ON(1);
2503 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2504 }
2505
2506 bitrates = sband->bitrates;
2507 num_rates = sband->n_bitrates;
2508 supp_rates = 0;
2509 for (i = 0; i < elems->supp_rates_len +
2510 elems->ext_supp_rates_len; i++) {
2511 u8 rate = 0;
2512 int own_rate;
2513 if (i < elems->supp_rates_len)
2514 rate = elems->supp_rates[i];
2515 else if (elems->ext_supp_rates)
2516 rate = elems->ext_supp_rates
2517 [i - elems->supp_rates_len];
2518 own_rate = 5 * (rate & 0x7f);
2519 for (j = 0; j < num_rates; j++)
2520 if (bitrates[j].bitrate == own_rate)
2521 supp_rates |= BIT(j);
2522 }
2523 return supp_rates;
2524 }
2525
2526
2527 static void ieee80211_rx_bss_info(struct net_device *dev,
2528 struct ieee80211_mgmt *mgmt,
2529 size_t len,
2530 struct ieee80211_rx_status *rx_status,
2531 int beacon)
2532 {
2533 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2534 struct ieee802_11_elems elems;
2535 size_t baselen;
2536 int freq, clen;
2537 struct ieee80211_sta_bss *bss;
2538 struct sta_info *sta;
2539 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2540 u64 beacon_timestamp, rx_timestamp;
2541 struct ieee80211_channel *channel;
2542 DECLARE_MAC_BUF(mac);
2543 DECLARE_MAC_BUF(mac2);
2544
2545 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2546 return; /* ignore ProbeResp to foreign address */
2547
2548 #if 0
2549 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2550 dev->name, beacon ? "Beacon" : "Probe Response",
2551 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2552 #endif
2553
2554 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2555 if (baselen > len)
2556 return;
2557
2558 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2559 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2560
2561 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2562 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2563 u64 rates = ieee80211_sta_get_rates(local, &elems,
2564 rx_status->band);
2565
2566 mesh_neighbour_update(mgmt->sa, rates, dev,
2567 mesh_peer_accepts_plinks(&elems, dev));
2568 }
2569
2570 rcu_read_lock();
2571
2572 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2573 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2574 (sta = sta_info_get(local, mgmt->sa))) {
2575 u64 prev_rates;
2576 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2577 rx_status->band);
2578
2579 prev_rates = sta->supp_rates[rx_status->band];
2580 sta->supp_rates[rx_status->band] &= supp_rates;
2581 if (sta->supp_rates[rx_status->band] == 0) {
2582 /* No matching rates - this should not really happen.
2583 * Make sure that at least one rate is marked
2584 * supported to avoid issues with TX rate ctrl. */
2585 sta->supp_rates[rx_status->band] =
2586 sdata->u.sta.supp_rates_bits[rx_status->band];
2587 }
2588 if (sta->supp_rates[rx_status->band] != prev_rates) {
2589 printk(KERN_DEBUG "%s: updated supp_rates set for "
2590 "%s based on beacon info (0x%llx & 0x%llx -> "
2591 "0x%llx)\n",
2592 dev->name, print_mac(mac, sta->addr),
2593 (unsigned long long) prev_rates,
2594 (unsigned long long) supp_rates,
2595 (unsigned long long) sta->supp_rates[rx_status->band]);
2596 }
2597 }
2598
2599 rcu_read_unlock();
2600
2601 if (elems.ds_params && elems.ds_params_len == 1)
2602 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2603 else
2604 freq = rx_status->freq;
2605
2606 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2607
2608 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2609 return;
2610
2611 #ifdef CONFIG_MAC80211_MESH
2612 if (elems.mesh_config)
2613 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2614 elems.mesh_id_len, elems.mesh_config, freq);
2615 else
2616 #endif
2617 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2618 elems.ssid, elems.ssid_len);
2619 if (!bss) {
2620 #ifdef CONFIG_MAC80211_MESH
2621 if (elems.mesh_config)
2622 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2623 elems.mesh_id_len, elems.mesh_config,
2624 elems.mesh_config_len, freq);
2625 else
2626 #endif
2627 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2628 elems.ssid, elems.ssid_len);
2629 if (!bss)
2630 return;
2631 } else {
2632 #if 0
2633 /* TODO: order by RSSI? */
2634 spin_lock_bh(&local->sta_bss_lock);
2635 list_move_tail(&bss->list, &local->sta_bss_list);
2636 spin_unlock_bh(&local->sta_bss_lock);
2637 #endif
2638 }
2639
2640 /* save the ERP value so that it is available at association time */
2641 if (elems.erp_info && elems.erp_info_len >= 1) {
2642 bss->erp_value = elems.erp_info[0];
2643 bss->has_erp_value = 1;
2644 }
2645
2646 if (elems.ht_cap_elem &&
2647 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2648 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2649 kfree(bss->ht_ie);
2650 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2651 if (bss->ht_ie) {
2652 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2653 elems.ht_cap_elem_len + 2);
2654 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2655 } else
2656 bss->ht_ie_len = 0;
2657 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2658 kfree(bss->ht_ie);
2659 bss->ht_ie = NULL;
2660 bss->ht_ie_len = 0;
2661 }
2662
2663 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2664 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2665
2666 bss->supp_rates_len = 0;
2667 if (elems.supp_rates) {
2668 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2669 if (clen > elems.supp_rates_len)
2670 clen = elems.supp_rates_len;
2671 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2672 clen);
2673 bss->supp_rates_len += clen;
2674 }
2675 if (elems.ext_supp_rates) {
2676 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2677 if (clen > elems.ext_supp_rates_len)
2678 clen = elems.ext_supp_rates_len;
2679 memcpy(&bss->supp_rates[bss->supp_rates_len],
2680 elems.ext_supp_rates, clen);
2681 bss->supp_rates_len += clen;
2682 }
2683
2684 bss->band = rx_status->band;
2685
2686 bss->timestamp = beacon_timestamp;
2687 bss->last_update = jiffies;
2688 bss->rssi = rx_status->ssi;
2689 bss->signal = rx_status->signal;
2690 bss->noise = rx_status->noise;
2691 if (!beacon && !bss->probe_resp)
2692 bss->probe_resp = true;
2693
2694 /*
2695 * In STA mode, the remaining parameters should not be overridden
2696 * by beacons because they're not necessarily accurate there.
2697 */
2698 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2699 bss->probe_resp && beacon) {
2700 ieee80211_rx_bss_put(dev, bss);
2701 return;
2702 }
2703
2704 if (elems.wpa &&
2705 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2706 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2707 kfree(bss->wpa_ie);
2708 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2709 if (bss->wpa_ie) {
2710 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2711 bss->wpa_ie_len = elems.wpa_len + 2;
2712 } else
2713 bss->wpa_ie_len = 0;
2714 } else if (!elems.wpa && bss->wpa_ie) {
2715 kfree(bss->wpa_ie);
2716 bss->wpa_ie = NULL;
2717 bss->wpa_ie_len = 0;
2718 }
2719
2720 if (elems.rsn &&
2721 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2722 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2723 kfree(bss->rsn_ie);
2724 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2725 if (bss->rsn_ie) {
2726 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2727 bss->rsn_ie_len = elems.rsn_len + 2;
2728 } else
2729 bss->rsn_ie_len = 0;
2730 } else if (!elems.rsn && bss->rsn_ie) {
2731 kfree(bss->rsn_ie);
2732 bss->rsn_ie = NULL;
2733 bss->rsn_ie_len = 0;
2734 }
2735
2736 /*
2737 * Cf.
2738 * http://www.wipo.int/pctdb/en/wo.jsp?wo=2007047181&IA=WO2007047181&DISPLAY=DESC
2739 *
2740 * quoting:
2741 *
2742 * In particular, "Wi-Fi CERTIFIED for WMM - Support for Multimedia
2743 * Applications with Quality of Service in Wi-Fi Networks," Wi- Fi
2744 * Alliance (September 1, 2004) is incorporated by reference herein.
2745 * The inclusion of the WMM Parameters in probe responses and
2746 * association responses is mandatory for WMM enabled networks. The
2747 * inclusion of the WMM Parameters in beacons, however, is optional.
2748 */
2749
2750 if (elems.wmm_param &&
2751 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2752 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2753 kfree(bss->wmm_ie);
2754 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2755 if (bss->wmm_ie) {
2756 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2757 elems.wmm_param_len + 2);
2758 bss->wmm_ie_len = elems.wmm_param_len + 2;
2759 } else
2760 bss->wmm_ie_len = 0;
2761 } else if (elems.wmm_info &&
2762 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_info_len ||
2763 memcmp(bss->wmm_ie, elems.wmm_info, elems.wmm_info_len))) {
2764 /* As for certain AP's Fifth bit is not set in WMM IE in
2765 * beacon frames.So while parsing the beacon frame the
2766 * wmm_info structure is used instead of wmm_param.
2767 * wmm_info structure was never used to set bss->wmm_ie.
2768 * This code fixes this problem by copying the WME
2769 * information from wmm_info to bss->wmm_ie and enabling
2770 * n-band association.
2771 */
2772 kfree(bss->wmm_ie);
2773 bss->wmm_ie = kmalloc(elems.wmm_info_len + 2, GFP_ATOMIC);
2774 if (bss->wmm_ie) {
2775 memcpy(bss->wmm_ie, elems.wmm_info - 2,
2776 elems.wmm_info_len + 2);
2777 bss->wmm_ie_len = elems.wmm_info_len + 2;
2778 } else
2779 bss->wmm_ie_len = 0;
2780 } else if (!elems.wmm_param && !elems.wmm_info && bss->wmm_ie) {
2781 kfree(bss->wmm_ie);
2782 bss->wmm_ie = NULL;
2783 bss->wmm_ie_len = 0;
2784 }
2785
2786 /* check if we need to merge IBSS */
2787 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2788 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2789 bss->capability & WLAN_CAPABILITY_IBSS &&
2790 bss->freq == local->oper_channel->center_freq &&
2791 elems.ssid_len == sdata->u.sta.ssid_len &&
2792 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2793 if (rx_status->flag & RX_FLAG_TSFT) {
2794 /* in order for correct IBSS merging we need mactime
2795 *
2796 * since mactime is defined as the time the first data
2797 * symbol of the frame hits the PHY, and the timestamp
2798 * of the beacon is defined as "the time that the data
2799 * symbol containing the first bit of the timestamp is
2800 * transmitted to the PHY plus the transmitting STA’s
2801 * delays through its local PHY from the MAC-PHY
2802 * interface to its interface with the WM"
2803 * (802.11 11.1.2) - equals the time this bit arrives at
2804 * the receiver - we have to take into account the
2805 * offset between the two.
2806 * e.g: at 1 MBit that means mactime is 192 usec earlier
2807 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2808 */
2809 int rate = local->hw.wiphy->bands[rx_status->band]->
2810 bitrates[rx_status->rate_idx].bitrate;
2811 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2812 } else if (local && local->ops && local->ops->get_tsf)
2813 /* second best option: get current TSF */
2814 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2815 else
2816 /* can't merge without knowing the TSF */
2817 rx_timestamp = -1LLU;
2818 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2819 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2820 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2821 print_mac(mac, mgmt->sa),
2822 print_mac(mac2, mgmt->bssid),
2823 (unsigned long long)rx_timestamp,
2824 (unsigned long long)beacon_timestamp,
2825 (unsigned long long)(rx_timestamp - beacon_timestamp),
2826 jiffies);
2827 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2828 if (beacon_timestamp > rx_timestamp) {
2829 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2830 if (net_ratelimit())
2831 #endif
2832 printk(KERN_DEBUG "%s: beacon TSF higher than "
2833 "local TSF - IBSS merge with BSSID %s\n",
2834 dev->name, print_mac(mac, mgmt->bssid));
2835 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2836 ieee80211_ibss_add_sta(dev, NULL,
2837 mgmt->bssid, mgmt->sa);
2838 }
2839 }
2840
2841 ieee80211_rx_bss_put(dev, bss);
2842 }
2843
2844
2845 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2846 struct ieee80211_mgmt *mgmt,
2847 size_t len,
2848 struct ieee80211_rx_status *rx_status)
2849 {
2850 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2851 }
2852
2853
2854 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2855 struct ieee80211_mgmt *mgmt,
2856 size_t len,
2857 struct ieee80211_rx_status *rx_status)
2858 {
2859 struct ieee80211_sub_if_data *sdata;
2860 struct ieee80211_if_sta *ifsta;
2861 size_t baselen;
2862 struct ieee802_11_elems elems;
2863 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2864 struct ieee80211_conf *conf = &local->hw.conf;
2865 u32 changed = 0;
2866
2867 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2868
2869 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2870 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2871 return;
2872 ifsta = &sdata->u.sta;
2873
2874 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2875 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2876 return;
2877
2878 /* Process beacon from the current BSS */
2879 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2880 if (baselen > len)
2881 return;
2882
2883 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2884
2885 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2886 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2887 elems.wmm_param_len);
2888 }
2889
2890 /* Do not send changes to driver if we are scanning. This removes
2891 * requirement that driver's bss_info_changed function needs to be
2892 * atomic. */
2893 if (local->sta_sw_scanning || local->sta_hw_scanning)
2894 return;
2895
2896 if (elems.erp_info && elems.erp_info_len >= 1)
2897 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2898 else {
2899 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2900 changed |= ieee80211_handle_protect_preamb(sdata, false,
2901 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2902 }
2903
2904 if (elems.ht_cap_elem && elems.ht_info_elem &&
2905 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2906 struct ieee80211_ht_bss_info bss_info;
2907
2908 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2909 (struct ieee80211_ht_addt_info *)
2910 elems.ht_info_elem, &bss_info);
2911 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2912 &bss_info);
2913 }
2914
2915 ieee80211_bss_info_change_notify(sdata, changed);
2916 }
2917
2918
2919 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2920 struct ieee80211_if_sta *ifsta,
2921 struct ieee80211_mgmt *mgmt,
2922 size_t len,
2923 struct ieee80211_rx_status *rx_status)
2924 {
2925 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2926 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2927 int tx_last_beacon;
2928 struct sk_buff *skb;
2929 struct ieee80211_mgmt *resp;
2930 u8 *pos, *end;
2931 DECLARE_MAC_BUF(mac);
2932 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2933 DECLARE_MAC_BUF(mac2);
2934 DECLARE_MAC_BUF(mac3);
2935 #endif
2936
2937 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2938 ifsta->state != IEEE80211_IBSS_JOINED ||
2939 len < 24 + 2 || !ifsta->probe_resp)
2940 return;
2941
2942 if (local->ops->tx_last_beacon)
2943 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2944 else
2945 tx_last_beacon = 1;
2946
2947 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2948 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2949 "%s (tx_last_beacon=%d)\n",
2950 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2951 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2952 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2953
2954 if (!tx_last_beacon)
2955 return;
2956
2957 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2958 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2959 return;
2960
2961 end = ((u8 *) mgmt) + len;
2962 pos = mgmt->u.probe_req.variable;
2963 if (pos[0] != WLAN_EID_SSID ||
2964 pos + 2 + pos[1] > end) {
2965 if (net_ratelimit()) {
2966 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2967 "from %s\n",
2968 dev->name, print_mac(mac, mgmt->sa));
2969 }
2970 return;
2971 }
2972 if (pos[1] != 0 &&
2973 (pos[1] != ifsta->ssid_len ||
2974 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2975 /* Ignore ProbeReq for foreign SSID */
2976 return;
2977 }
2978
2979 /* Reply with ProbeResp */
2980 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2981 if (!skb)
2982 return;
2983
2984 resp = (struct ieee80211_mgmt *) skb->data;
2985 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2986 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2987 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2988 dev->name, print_mac(mac, resp->da));
2989 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2990 ieee80211_sta_tx(dev, skb, 0);
2991 }
2992
2993 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2994 struct ieee80211_if_sta *ifsta,
2995 struct ieee80211_mgmt *mgmt,
2996 size_t len,
2997 struct ieee80211_rx_status *rx_status)
2998 {
2999 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3000
3001 if (len < IEEE80211_MIN_ACTION_SIZE)
3002 return;
3003
3004 switch (mgmt->u.action.category) {
3005 case WLAN_CATEGORY_BACK:
3006 switch (mgmt->u.action.u.addba_req.action_code) {
3007 case WLAN_ACTION_ADDBA_REQ:
3008 if (len < (IEEE80211_MIN_ACTION_SIZE +
3009 sizeof(mgmt->u.action.u.addba_req)))
3010 break;
3011 ieee80211_sta_process_addba_request(dev, mgmt, len);
3012 break;
3013 case WLAN_ACTION_ADDBA_RESP:
3014 if (len < (IEEE80211_MIN_ACTION_SIZE +
3015 sizeof(mgmt->u.action.u.addba_resp)))
3016 break;
3017 ieee80211_sta_process_addba_resp(dev, mgmt, len);
3018 break;
3019 case WLAN_ACTION_DELBA:
3020 if (len < (IEEE80211_MIN_ACTION_SIZE +
3021 sizeof(mgmt->u.action.u.delba)))
3022 break;
3023 ieee80211_sta_process_delba(dev, mgmt, len);
3024 break;
3025 default:
3026 if (net_ratelimit())
3027 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
3028 dev->name);
3029 break;
3030 }
3031 break;
3032 case PLINK_CATEGORY:
3033 if (ieee80211_vif_is_mesh(&sdata->vif))
3034 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
3035 break;
3036 case MESH_PATH_SEL_CATEGORY:
3037 if (ieee80211_vif_is_mesh(&sdata->vif))
3038 mesh_rx_path_sel_frame(dev, mgmt, len);
3039 break;
3040 default:
3041 if (net_ratelimit())
3042 printk(KERN_DEBUG "%s: Rx unknown action frame - "
3043 "category=%d\n", dev->name, mgmt->u.action.category);
3044 break;
3045 }
3046 }
3047
3048 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
3049 struct ieee80211_rx_status *rx_status)
3050 {
3051 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3052 struct ieee80211_sub_if_data *sdata;
3053 struct ieee80211_if_sta *ifsta;
3054 struct ieee80211_mgmt *mgmt;
3055 u16 fc;
3056
3057 if (skb->len < 24)
3058 goto fail;
3059
3060 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3061 ifsta = &sdata->u.sta;
3062
3063 mgmt = (struct ieee80211_mgmt *) skb->data;
3064 fc = le16_to_cpu(mgmt->frame_control);
3065
3066 switch (fc & IEEE80211_FCTL_STYPE) {
3067 case IEEE80211_STYPE_PROBE_REQ:
3068 case IEEE80211_STYPE_PROBE_RESP:
3069 case IEEE80211_STYPE_BEACON:
3070 case IEEE80211_STYPE_ACTION:
3071 memcpy(skb->cb, rx_status, sizeof(*rx_status));
3072 case IEEE80211_STYPE_AUTH:
3073 case IEEE80211_STYPE_ASSOC_RESP:
3074 case IEEE80211_STYPE_REASSOC_RESP:
3075 case IEEE80211_STYPE_DEAUTH:
3076 case IEEE80211_STYPE_DISASSOC:
3077 skb_queue_tail(&ifsta->skb_queue, skb);
3078 queue_work(local->hw.workqueue, &ifsta->work);
3079 return;
3080 default:
3081 printk(KERN_DEBUG "%s: received unknown management frame - "
3082 "stype=%d\n", dev->name,
3083 (fc & IEEE80211_FCTL_STYPE) >> 4);
3084 break;
3085 }
3086
3087 fail:
3088 kfree_skb(skb);
3089 }
3090
3091
3092 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
3093 struct sk_buff *skb)
3094 {
3095 struct ieee80211_rx_status *rx_status;
3096 struct ieee80211_sub_if_data *sdata;
3097 struct ieee80211_if_sta *ifsta;
3098 struct ieee80211_mgmt *mgmt;
3099 u16 fc;
3100
3101 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3102 ifsta = &sdata->u.sta;
3103
3104 rx_status = (struct ieee80211_rx_status *) skb->cb;
3105 mgmt = (struct ieee80211_mgmt *) skb->data;
3106 fc = le16_to_cpu(mgmt->frame_control);
3107
3108 switch (fc & IEEE80211_FCTL_STYPE) {
3109 case IEEE80211_STYPE_PROBE_REQ:
3110 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
3111 rx_status);
3112 break;
3113 case IEEE80211_STYPE_PROBE_RESP:
3114 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
3115 break;
3116 case IEEE80211_STYPE_BEACON:
3117 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
3118 break;
3119 case IEEE80211_STYPE_AUTH:
3120 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
3121 break;
3122 case IEEE80211_STYPE_ASSOC_RESP:
3123 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
3124 break;
3125 case IEEE80211_STYPE_REASSOC_RESP:
3126 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
3127 break;
3128 case IEEE80211_STYPE_DEAUTH:
3129 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3130 break;
3131 case IEEE80211_STYPE_DISASSOC:
3132 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3133 break;
3134 case IEEE80211_STYPE_ACTION:
3135 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3136 break;
3137 }
3138
3139 kfree_skb(skb);
3140 }
3141
3142
3143 ieee80211_rx_result
3144 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3145 struct ieee80211_rx_status *rx_status)
3146 {
3147 struct ieee80211_mgmt *mgmt;
3148 u16 fc;
3149
3150 if (skb->len < 2)
3151 return RX_DROP_UNUSABLE;
3152
3153 mgmt = (struct ieee80211_mgmt *) skb->data;
3154 fc = le16_to_cpu(mgmt->frame_control);
3155
3156 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3157 return RX_CONTINUE;
3158
3159 if (skb->len < 24)
3160 return RX_DROP_MONITOR;
3161
3162 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3163 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3164 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3165 skb->len, rx_status);
3166 dev_kfree_skb(skb);
3167 return RX_QUEUED;
3168 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3169 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3170 rx_status);
3171 dev_kfree_skb(skb);
3172 return RX_QUEUED;
3173 }
3174 }
3175 return RX_CONTINUE;
3176 }
3177
3178
3179 static int ieee80211_sta_active_ibss(struct net_device *dev)
3180 {
3181 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3182 int active = 0;
3183 struct sta_info *sta;
3184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3185
3186 rcu_read_lock();
3187
3188 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3189 if (sta->sdata == sdata &&
3190 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3191 jiffies)) {
3192 active++;
3193 break;
3194 }
3195 }
3196
3197 rcu_read_unlock();
3198
3199 return active;
3200 }
3201
3202
3203 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3204 {
3205 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3206 struct sta_info *sta, *tmp;
3207 LIST_HEAD(tmp_list);
3208 DECLARE_MAC_BUF(mac);
3209 unsigned long flags;
3210
3211 spin_lock_irqsave(&local->sta_lock, flags);
3212 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3213 if (time_after(jiffies, sta->last_rx + exp_time)) {
3214 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3215 dev->name, print_mac(mac, sta->addr));
3216 __sta_info_unlink(&sta);
3217 if (sta)
3218 list_add(&sta->list, &tmp_list);
3219 }
3220 spin_unlock_irqrestore(&local->sta_lock, flags);
3221
3222 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3223 sta_info_destroy(sta);
3224 }
3225
3226
3227 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3228 struct ieee80211_if_sta *ifsta)
3229 {
3230 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3231
3232 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3233 if (ieee80211_sta_active_ibss(dev))
3234 return;
3235
3236 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3237 "IBSS networks with same SSID (merge)\n", dev->name);
3238 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3239 }
3240
3241
3242 #ifdef CONFIG_MAC80211_MESH
3243 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3244 struct ieee80211_if_sta *ifsta)
3245 {
3246 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3247 bool free_plinks;
3248
3249 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3250 mesh_path_expire(dev);
3251
3252 free_plinks = mesh_plink_availables(sdata);
3253 if (free_plinks != sdata->u.sta.accepting_plinks)
3254 ieee80211_if_config_beacon(dev);
3255
3256 mod_timer(&ifsta->timer, jiffies +
3257 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3258 }
3259
3260
3261 void ieee80211_start_mesh(struct net_device *dev)
3262 {
3263 struct ieee80211_if_sta *ifsta;
3264 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3265 ifsta = &sdata->u.sta;
3266 ifsta->state = IEEE80211_MESH_UP;
3267 ieee80211_sta_timer((unsigned long)sdata);
3268 }
3269 #endif
3270
3271
3272 void ieee80211_sta_timer(unsigned long data)
3273 {
3274 struct ieee80211_sub_if_data *sdata =
3275 (struct ieee80211_sub_if_data *) data;
3276 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3277 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3278
3279 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3280 queue_work(local->hw.workqueue, &ifsta->work);
3281 }
3282
3283 void ieee80211_sta_work(struct work_struct *work)
3284 {
3285 struct ieee80211_sub_if_data *sdata =
3286 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3287 struct net_device *dev = sdata->dev;
3288 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3289 struct ieee80211_if_sta *ifsta;
3290 struct sk_buff *skb;
3291
3292 if (!netif_running(dev))
3293 return;
3294
3295 if (local->sta_sw_scanning || local->sta_hw_scanning)
3296 return;
3297
3298 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3299 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3300 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3301 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3302 "(type=%d)\n", dev->name, sdata->vif.type);
3303 return;
3304 }
3305 ifsta = &sdata->u.sta;
3306
3307 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3308 ieee80211_sta_rx_queued_mgmt(dev, skb);
3309
3310 #ifdef CONFIG_MAC80211_MESH
3311 if (ifsta->preq_queue_len &&
3312 time_after(jiffies,
3313 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3314 mesh_path_start_discovery(dev);
3315 #endif
3316
3317 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3318 ifsta->state != IEEE80211_ASSOCIATE &&
3319 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3320 if (ifsta->scan_ssid_len)
3321 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3322 else
3323 ieee80211_sta_start_scan(dev, NULL, 0);
3324 return;
3325 }
3326
3327 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3328 if (ieee80211_sta_config_auth(dev, ifsta))
3329 return;
3330 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3331 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3332 return;
3333
3334 switch (ifsta->state) {
3335 case IEEE80211_DISABLED:
3336 break;
3337 case IEEE80211_AUTHENTICATE:
3338 ieee80211_authenticate(dev, ifsta);
3339 break;
3340 case IEEE80211_ASSOCIATE:
3341 ieee80211_associate(dev, ifsta);
3342 break;
3343 case IEEE80211_ASSOCIATED:
3344 ieee80211_associated(dev, ifsta);
3345 break;
3346 case IEEE80211_IBSS_SEARCH:
3347 ieee80211_sta_find_ibss(dev, ifsta);
3348 break;
3349 case IEEE80211_IBSS_JOINED:
3350 ieee80211_sta_merge_ibss(dev, ifsta);
3351 break;
3352 #ifdef CONFIG_MAC80211_MESH
3353 case IEEE80211_MESH_UP:
3354 ieee80211_mesh_housekeeping(dev, ifsta);
3355 break;
3356 #endif
3357 default:
3358 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3359 ifsta->state);
3360 break;
3361 }
3362
3363 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3364 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3365 "mixed-cell disabled - disassociate\n", dev->name);
3366
3367 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3368 ieee80211_set_disassoc(dev, ifsta, 0);
3369 }
3370 }
3371
3372
3373 static void ieee80211_sta_reset_auth(struct net_device *dev,
3374 struct ieee80211_if_sta *ifsta)
3375 {
3376 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3377
3378 if (local->ops->reset_tsf) {
3379 /* Reset own TSF to allow time synchronization work. */
3380 local->ops->reset_tsf(local_to_hw(local));
3381 }
3382
3383 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3384
3385
3386 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3387 ifsta->auth_alg = WLAN_AUTH_OPEN;
3388 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3389 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3390 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3391 ifsta->auth_alg = WLAN_AUTH_LEAP;
3392 else
3393 ifsta->auth_alg = WLAN_AUTH_OPEN;
3394 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3395 ifsta->auth_alg);
3396 ifsta->auth_transaction = -1;
3397 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3398 ifsta->auth_tries = ifsta->assoc_tries = 0;
3399 netif_carrier_off(dev);
3400 }
3401
3402
3403 void ieee80211_sta_req_auth(struct net_device *dev,
3404 struct ieee80211_if_sta *ifsta)
3405 {
3406 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3407 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3408
3409 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3410 return;
3411
3412 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3413 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3414 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3415 IEEE80211_STA_AUTO_SSID_SEL))) {
3416 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3417 queue_work(local->hw.workqueue, &ifsta->work);
3418 }
3419 }
3420
3421 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3422 const char *ssid, int ssid_len)
3423 {
3424 int tmp, hidden_ssid;
3425
3426 if (ssid_len == ifsta->ssid_len &&
3427 !memcmp(ifsta->ssid, ssid, ssid_len))
3428 return 1;
3429
3430 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3431 return 0;
3432
3433 hidden_ssid = 1;
3434 tmp = ssid_len;
3435 while (tmp--) {
3436 if (ssid[tmp] != '\0') {
3437 hidden_ssid = 0;
3438 break;
3439 }
3440 }
3441
3442 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3443 return 1;
3444
3445 if (ssid_len == 1 && ssid[0] == ' ')
3446 return 1;
3447
3448 return 0;
3449 }
3450
3451 static int ieee80211_sta_config_auth(struct net_device *dev,
3452 struct ieee80211_if_sta *ifsta)
3453 {
3454 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3455 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3456 struct ieee80211_sta_bss *bss, *selected = NULL;
3457 int top_rssi = 0, freq;
3458
3459 spin_lock_bh(&local->sta_bss_lock);
3460 freq = local->oper_channel->center_freq;
3461 list_for_each_entry(bss, &local->sta_bss_list, list) {
3462 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3463 continue;
3464
3465 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3466 IEEE80211_STA_AUTO_BSSID_SEL |
3467 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3468 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3469 !!sdata->default_key))
3470 continue;
3471
3472 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3473 bss->freq != freq)
3474 continue;
3475
3476 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3477 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3478 continue;
3479
3480 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3481 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3482 continue;
3483
3484 if (!selected || top_rssi < bss->rssi) {
3485 selected = bss;
3486 top_rssi = bss->rssi;
3487 }
3488 }
3489 if (selected)
3490 atomic_inc(&selected->users);
3491 spin_unlock_bh(&local->sta_bss_lock);
3492
3493 if (selected) {
3494 ieee80211_set_freq(local, selected->freq);
3495 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3496 ieee80211_sta_set_ssid(dev, selected->ssid,
3497 selected->ssid_len);
3498 ieee80211_sta_set_bssid(dev, selected->bssid);
3499 ieee80211_sta_def_wmm_params(dev, selected, 0);
3500 ieee80211_rx_bss_put(dev, selected);
3501 ifsta->state = IEEE80211_AUTHENTICATE;
3502 ieee80211_sta_reset_auth(dev, ifsta);
3503 return 0;
3504 } else {
3505 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3506 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3507 ieee80211_sta_start_scan(dev, NULL, 0);
3508 else
3509 ieee80211_sta_start_scan(dev, ifsta->ssid,
3510 ifsta->ssid_len);
3511 ifsta->state = IEEE80211_AUTHENTICATE;
3512 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3513 } else
3514 ifsta->state = IEEE80211_DISABLED;
3515 }
3516 return -1;
3517 }
3518
3519
3520 static int ieee80211_sta_create_ibss(struct net_device *dev,
3521 struct ieee80211_if_sta *ifsta)
3522 {
3523 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3524 struct ieee80211_sta_bss *bss;
3525 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3526 struct ieee80211_supported_band *sband;
3527 u8 bssid[ETH_ALEN], *pos;
3528 int i;
3529 int ret;
3530 DECLARE_MAC_BUF(mac);
3531
3532 #if 0
3533 /* Easier testing, use fixed BSSID. */
3534 memset(bssid, 0xfe, ETH_ALEN);
3535 #else
3536 /* Generate random, not broadcast, locally administered BSSID. Mix in
3537 * own MAC address to make sure that devices that do not have proper
3538 * random number generator get different BSSID. */
3539 get_random_bytes(bssid, ETH_ALEN);
3540 for (i = 0; i < ETH_ALEN; i++)
3541 bssid[i] ^= dev->dev_addr[i];
3542 bssid[0] &= ~0x01;
3543 bssid[0] |= 0x02;
3544 #endif
3545
3546 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3547 dev->name, print_mac(mac, bssid));
3548
3549 bss = ieee80211_rx_bss_add(dev, bssid,
3550 local->hw.conf.channel->center_freq,
3551 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3552 if (!bss)
3553 return -ENOMEM;
3554
3555 bss->band = local->hw.conf.channel->band;
3556 sband = local->hw.wiphy->bands[bss->band];
3557
3558 if (local->hw.conf.beacon_int == 0)
3559 local->hw.conf.beacon_int = 10000;
3560 bss->beacon_int = local->hw.conf.beacon_int;
3561 bss->last_update = jiffies;
3562 bss->capability = WLAN_CAPABILITY_IBSS;
3563 if (sdata->default_key) {
3564 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3565 } else
3566 sdata->drop_unencrypted = 0;
3567 bss->supp_rates_len = sband->n_bitrates;
3568 pos = bss->supp_rates;
3569 for (i = 0; i < sband->n_bitrates; i++) {
3570 int rate = sband->bitrates[i].bitrate;
3571 *pos++ = (u8) (rate / 5);
3572 }
3573
3574 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3575 ieee80211_rx_bss_put(dev, bss);
3576 return ret;
3577 }
3578
3579
3580 static int ieee80211_sta_find_ibss(struct net_device *dev,
3581 struct ieee80211_if_sta *ifsta)
3582 {
3583 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3584 struct ieee80211_sta_bss *bss;
3585 int found = 0;
3586 u8 bssid[ETH_ALEN];
3587 int active_ibss;
3588 DECLARE_MAC_BUF(mac);
3589 DECLARE_MAC_BUF(mac2);
3590
3591 if (ifsta->ssid_len == 0)
3592 return -EINVAL;
3593
3594 active_ibss = ieee80211_sta_active_ibss(dev);
3595 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3596 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3597 dev->name, active_ibss);
3598 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3599 spin_lock_bh(&local->sta_bss_lock);
3600 list_for_each_entry(bss, &local->sta_bss_list, list) {
3601 if (ifsta->ssid_len != bss->ssid_len ||
3602 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3603 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3604 continue;
3605 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3606 printk(KERN_DEBUG " bssid=%s found\n",
3607 print_mac(mac, bss->bssid));
3608 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3609 memcpy(bssid, bss->bssid, ETH_ALEN);
3610 found = 1;
3611 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3612 break;
3613 }
3614 spin_unlock_bh(&local->sta_bss_lock);
3615
3616 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3617 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3618 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3619 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3620 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3621 (bss = ieee80211_rx_bss_get(dev, bssid,
3622 local->hw.conf.channel->center_freq,
3623 ifsta->ssid, ifsta->ssid_len))) {
3624 int ret;
3625 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3626 " based on configured SSID\n",
3627 dev->name, print_mac(mac, bssid));
3628 ret = ieee80211_sta_join_ibss(dev, ifsta, bss);
3629 ieee80211_rx_bss_put(dev, bss);
3630 return ret;
3631 }
3632 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3633 printk(KERN_DEBUG " did not try to join ibss\n");
3634 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3635
3636 /* Selected IBSS not found in current scan results - try to scan */
3637 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3638 !ieee80211_sta_active_ibss(dev)) {
3639 mod_timer(&ifsta->timer, jiffies +
3640 IEEE80211_IBSS_MERGE_INTERVAL);
3641 } else if (time_after(jiffies, local->last_scan_completed +
3642 IEEE80211_SCAN_INTERVAL)) {
3643 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3644 "join\n", dev->name);
3645 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3646 ifsta->ssid_len);
3647 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3648 int interval = IEEE80211_SCAN_INTERVAL;
3649
3650 if (time_after(jiffies, ifsta->ibss_join_req +
3651 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3652 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3653 (!(local->oper_channel->flags &
3654 IEEE80211_CHAN_NO_IBSS)))
3655 return ieee80211_sta_create_ibss(dev, ifsta);
3656 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3657 printk(KERN_DEBUG "%s: IBSS not allowed on"
3658 " %d MHz\n", dev->name,
3659 local->hw.conf.channel->center_freq);
3660 }
3661
3662 /* No IBSS found - decrease scan interval and continue
3663 * scanning. */
3664 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3665 }
3666
3667 ifsta->state = IEEE80211_IBSS_SEARCH;
3668 mod_timer(&ifsta->timer, jiffies + interval);
3669 return 0;
3670 }
3671
3672 return 0;
3673 }
3674
3675
3676 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3677 {
3678 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3679 struct ieee80211_if_sta *ifsta;
3680
3681 if (len > IEEE80211_MAX_SSID_LEN)
3682 return -EINVAL;
3683
3684 ifsta = &sdata->u.sta;
3685
3686 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3687 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3688 memcpy(ifsta->ssid, ssid, len);
3689 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3690 ifsta->ssid_len = len;
3691
3692 if (len)
3693 ifsta->flags |= IEEE80211_STA_SSID_SET;
3694 else
3695 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3696 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3697 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3698 ifsta->ibss_join_req = jiffies;
3699 ifsta->state = IEEE80211_IBSS_SEARCH;
3700 return ieee80211_sta_find_ibss(dev, ifsta);
3701 }
3702 return 0;
3703 }
3704
3705
3706 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3707 {
3708 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3709 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3710 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3711 *len = ifsta->ssid_len;
3712 return 0;
3713 }
3714
3715
3716 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3717 {
3718 struct ieee80211_sub_if_data *sdata;
3719 struct ieee80211_if_sta *ifsta;
3720 int res;
3721
3722 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3723 ifsta = &sdata->u.sta;
3724
3725 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3726 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3727 res = ieee80211_if_config(dev);
3728 if (res) {
3729 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3730 "the low-level driver\n", dev->name);
3731 return res;
3732 }
3733 }
3734
3735 if (is_valid_ether_addr(bssid))
3736 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3737 else
3738 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3739
3740 return 0;
3741 }
3742
3743
3744 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3745 struct ieee80211_sub_if_data *sdata,
3746 int powersave)
3747 {
3748 struct sk_buff *skb;
3749 struct ieee80211_hdr *nullfunc;
3750 u16 fc;
3751
3752 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3753 if (!skb) {
3754 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3755 "frame\n", sdata->dev->name);
3756 return;
3757 }
3758 skb_reserve(skb, local->hw.extra_tx_headroom);
3759
3760 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3761 memset(nullfunc, 0, 24);
3762 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3763 IEEE80211_FCTL_TODS;
3764 if (powersave)
3765 fc |= IEEE80211_FCTL_PM;
3766 nullfunc->frame_control = cpu_to_le16(fc);
3767 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3768 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3769 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3770
3771 ieee80211_sta_tx(sdata->dev, skb, 0);
3772 }
3773
3774
3775 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3776 {
3777 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3778 ieee80211_vif_is_mesh(&sdata->vif))
3779 ieee80211_sta_timer((unsigned long)sdata);
3780 }
3781
3782 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3783 {
3784 struct ieee80211_local *local = hw_to_local(hw);
3785 struct net_device *dev = local->scan_dev;
3786 struct ieee80211_sub_if_data *sdata;
3787 union iwreq_data wrqu;
3788
3789 local->last_scan_completed = jiffies;
3790 memset(&wrqu, 0, sizeof(wrqu));
3791 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3792
3793 if (local->sta_hw_scanning) {
3794 local->sta_hw_scanning = 0;
3795 if (ieee80211_hw_config(local))
3796 printk(KERN_DEBUG "%s: failed to restore operational "
3797 "channel after scan\n", dev->name);
3798 /* Restart STA timer for HW scan case */
3799 rcu_read_lock();
3800 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3801 ieee80211_restart_sta_timer(sdata);
3802 rcu_read_unlock();
3803
3804 goto done;
3805 }
3806
3807 local->sta_sw_scanning = 0;
3808 if (ieee80211_hw_config(local))
3809 printk(KERN_DEBUG "%s: failed to restore operational "
3810 "channel after scan\n", dev->name);
3811
3812
3813 netif_tx_lock_bh(local->mdev);
3814 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3815 local->ops->configure_filter(local_to_hw(local),
3816 FIF_BCN_PRBRESP_PROMISC,
3817 &local->filter_flags,
3818 local->mdev->mc_count,
3819 local->mdev->mc_list);
3820
3821 netif_tx_unlock_bh(local->mdev);
3822
3823 rcu_read_lock();
3824 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3825
3826 /* No need to wake the master device. */
3827 if (sdata->dev == local->mdev)
3828 continue;
3829
3830 /* Tell AP we're back */
3831 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3832 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3833 ieee80211_send_nullfunc(local, sdata, 0);
3834
3835 ieee80211_restart_sta_timer(sdata);
3836
3837 netif_wake_queue(sdata->dev);
3838 }
3839 rcu_read_unlock();
3840
3841 done:
3842 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3843 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3844 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3845 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3846 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3847 !ieee80211_sta_active_ibss(dev)))
3848 ieee80211_sta_find_ibss(dev, ifsta);
3849 }
3850 }
3851 EXPORT_SYMBOL(ieee80211_scan_completed);
3852
3853 void ieee80211_sta_scan_work(struct work_struct *work)
3854 {
3855 struct ieee80211_local *local =
3856 container_of(work, struct ieee80211_local, scan_work.work);
3857 struct net_device *dev = local->scan_dev;
3858 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3859 struct ieee80211_supported_band *sband;
3860 struct ieee80211_channel *chan;
3861 int skip;
3862 unsigned long next_delay = 0;
3863
3864 if (!local->sta_sw_scanning)
3865 return;
3866
3867 switch (local->scan_state) {
3868 case SCAN_SET_CHANNEL:
3869 /*
3870 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3871 * after we successfully scanned the last channel of the last
3872 * band (and the last band is supported by the hw)
3873 */
3874 if (local->scan_band < IEEE80211_NUM_BANDS)
3875 sband = local->hw.wiphy->bands[local->scan_band];
3876 else
3877 sband = NULL;
3878
3879 /*
3880 * If we are at an unsupported band and have more bands
3881 * left to scan, advance to the next supported one.
3882 */
3883 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3884 local->scan_band++;
3885 sband = local->hw.wiphy->bands[local->scan_band];
3886 local->scan_channel_idx = 0;
3887 }
3888
3889 /* if no more bands/channels left, complete scan */
3890 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3891 ieee80211_scan_completed(local_to_hw(local));
3892 return;
3893 }
3894 skip = 0;
3895 chan = &sband->channels[local->scan_channel_idx];
3896
3897 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3898 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3899 chan->flags & IEEE80211_CHAN_NO_IBSS))
3900 skip = 1;
3901
3902 if (!skip) {
3903 local->scan_channel = chan;
3904 if (ieee80211_hw_config(local)) {
3905 printk(KERN_DEBUG "%s: failed to set freq to "
3906 "%d MHz for scan\n", dev->name,
3907 chan->center_freq);
3908 skip = 1;
3909 }
3910 }
3911
3912 /* advance state machine to next channel/band */
3913 local->scan_channel_idx++;
3914 if (local->scan_channel_idx >= sband->n_channels) {
3915 /*
3916 * scan_band may end up == IEEE80211_NUM_BANDS, but
3917 * we'll catch that case above and complete the scan
3918 * if that is the case.
3919 */
3920 local->scan_band++;
3921 local->scan_channel_idx = 0;
3922 }
3923
3924 if (skip)
3925 break;
3926
3927 next_delay = IEEE80211_PROBE_DELAY +
3928 usecs_to_jiffies(local->hw.channel_change_time);
3929 local->scan_state = SCAN_SEND_PROBE;
3930 break;
3931 case SCAN_SEND_PROBE:
3932 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3933 local->scan_state = SCAN_SET_CHANNEL;
3934
3935 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3936 break;
3937 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3938 local->scan_ssid_len);
3939 next_delay = IEEE80211_CHANNEL_TIME;
3940 break;
3941 }
3942
3943 if (local->sta_sw_scanning)
3944 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3945 next_delay);
3946 }
3947
3948
3949 static int ieee80211_sta_start_scan(struct net_device *dev,
3950 u8 *ssid, size_t ssid_len)
3951 {
3952 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3953 struct ieee80211_sub_if_data *sdata;
3954
3955 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3956 return -EINVAL;
3957
3958 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3959 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3960 * BSSID: MACAddress
3961 * SSID
3962 * ScanType: ACTIVE, PASSIVE
3963 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3964 * a Probe frame during active scanning
3965 * ChannelList
3966 * MinChannelTime (>= ProbeDelay), in TU
3967 * MaxChannelTime: (>= MinChannelTime), in TU
3968 */
3969
3970 /* MLME-SCAN.confirm
3971 * BSSDescriptionSet
3972 * ResultCode: SUCCESS, INVALID_PARAMETERS
3973 */
3974
3975 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3976 if (local->scan_dev == dev)
3977 return 0;
3978 return -EBUSY;
3979 }
3980
3981 if (local->ops->hw_scan) {
3982 int rc = local->ops->hw_scan(local_to_hw(local),
3983 ssid, ssid_len);
3984 if (!rc) {
3985 local->sta_hw_scanning = 1;
3986 local->scan_dev = dev;
3987 }
3988 return rc;
3989 }
3990
3991 local->sta_sw_scanning = 1;
3992
3993 rcu_read_lock();
3994 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3995
3996 /* Don't stop the master interface, otherwise we can't transmit
3997 * probes! */
3998 if (sdata->dev == local->mdev)
3999 continue;
4000
4001 netif_stop_queue(sdata->dev);
4002 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
4003 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
4004 ieee80211_send_nullfunc(local, sdata, 1);
4005 }
4006 rcu_read_unlock();
4007
4008 if (ssid) {
4009 local->scan_ssid_len = ssid_len;
4010 memcpy(local->scan_ssid, ssid, ssid_len);
4011 } else
4012 local->scan_ssid_len = 0;
4013 local->scan_state = SCAN_SET_CHANNEL;
4014 local->scan_channel_idx = 0;
4015 local->scan_band = IEEE80211_BAND_2GHZ;
4016 local->scan_dev = dev;
4017
4018 netif_tx_lock_bh(local->mdev);
4019 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
4020 local->ops->configure_filter(local_to_hw(local),
4021 FIF_BCN_PRBRESP_PROMISC,
4022 &local->filter_flags,
4023 local->mdev->mc_count,
4024 local->mdev->mc_list);
4025 netif_tx_unlock_bh(local->mdev);
4026
4027 /* TODO: start scan as soon as all nullfunc frames are ACKed */
4028 queue_delayed_work(local->hw.workqueue, &local->scan_work,
4029 IEEE80211_CHANNEL_TIME);
4030
4031 return 0;
4032 }
4033
4034
4035 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
4036 {
4037 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4038 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4039 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4040
4041 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4042 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
4043
4044 if (local->sta_sw_scanning || local->sta_hw_scanning) {
4045 if (local->scan_dev == dev)
4046 return 0;
4047 return -EBUSY;
4048 }
4049
4050 ifsta->scan_ssid_len = ssid_len;
4051 if (ssid_len)
4052 memcpy(ifsta->scan_ssid, ssid, ssid_len);
4053 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
4054 queue_work(local->hw.workqueue, &ifsta->work);
4055 return 0;
4056 }
4057
4058 static char *
4059 ieee80211_sta_scan_result(struct net_device *dev,
4060 struct ieee80211_sta_bss *bss,
4061 char *current_ev, char *end_buf)
4062 {
4063 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4064 struct iw_event iwe;
4065
4066 if (time_after(jiffies,
4067 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
4068 return current_ev;
4069
4070 memset(&iwe, 0, sizeof(iwe));
4071 iwe.cmd = SIOCGIWAP;
4072 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
4073 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
4074 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4075 IW_EV_ADDR_LEN);
4076
4077 memset(&iwe, 0, sizeof(iwe));
4078 iwe.cmd = SIOCGIWESSID;
4079 if (bss_mesh_cfg(bss)) {
4080 iwe.u.data.length = bss_mesh_id_len(bss);
4081 iwe.u.data.flags = 1;
4082 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4083 bss_mesh_id(bss));
4084 } else {
4085 iwe.u.data.length = bss->ssid_len;
4086 iwe.u.data.flags = 1;
4087 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4088 bss->ssid);
4089 }
4090
4091 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
4092 || bss_mesh_cfg(bss)) {
4093 memset(&iwe, 0, sizeof(iwe));
4094 iwe.cmd = SIOCGIWMODE;
4095 if (bss_mesh_cfg(bss))
4096 iwe.u.mode = IW_MODE_MESH;
4097 else if (bss->capability & WLAN_CAPABILITY_ESS)
4098 iwe.u.mode = IW_MODE_MASTER;
4099 else
4100 iwe.u.mode = IW_MODE_ADHOC;
4101 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4102 IW_EV_UINT_LEN);
4103 }
4104
4105 memset(&iwe, 0, sizeof(iwe));
4106 iwe.cmd = SIOCGIWFREQ;
4107 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
4108 iwe.u.freq.e = 0;
4109 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4110 IW_EV_FREQ_LEN);
4111
4112 memset(&iwe, 0, sizeof(iwe));
4113 iwe.cmd = SIOCGIWFREQ;
4114 iwe.u.freq.m = bss->freq;
4115 iwe.u.freq.e = 6;
4116 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4117 IW_EV_FREQ_LEN);
4118 memset(&iwe, 0, sizeof(iwe));
4119 iwe.cmd = IWEVQUAL;
4120 iwe.u.qual.qual = bss->signal;
4121 iwe.u.qual.level = bss->rssi;
4122 iwe.u.qual.noise = bss->noise;
4123 iwe.u.qual.updated = local->wstats_flags;
4124 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4125 IW_EV_QUAL_LEN);
4126
4127 memset(&iwe, 0, sizeof(iwe));
4128 iwe.cmd = SIOCGIWENCODE;
4129 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4130 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4131 else
4132 iwe.u.data.flags = IW_ENCODE_DISABLED;
4133 iwe.u.data.length = 0;
4134 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4135
4136 if (bss && bss->wpa_ie) {
4137 memset(&iwe, 0, sizeof(iwe));
4138 iwe.cmd = IWEVGENIE;
4139 iwe.u.data.length = bss->wpa_ie_len;
4140 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4141 bss->wpa_ie);
4142 }
4143
4144 if (bss && bss->rsn_ie) {
4145 memset(&iwe, 0, sizeof(iwe));
4146 iwe.cmd = IWEVGENIE;
4147 iwe.u.data.length = bss->rsn_ie_len;
4148 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4149 bss->rsn_ie);
4150 }
4151
4152 if (bss && bss->supp_rates_len > 0) {
4153 /* display all supported rates in readable format */
4154 char *p = current_ev + IW_EV_LCP_LEN;
4155 int i;
4156
4157 memset(&iwe, 0, sizeof(iwe));
4158 iwe.cmd = SIOCGIWRATE;
4159 /* Those two flags are ignored... */
4160 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4161
4162 for (i = 0; i < bss->supp_rates_len; i++) {
4163 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4164 0x7f) * 500000);
4165 p = iwe_stream_add_value(current_ev, p,
4166 end_buf, &iwe, IW_EV_PARAM_LEN);
4167 }
4168 current_ev = p;
4169 }
4170
4171 if (bss) {
4172 char *buf;
4173 buf = kmalloc(30, GFP_ATOMIC);
4174 if (buf) {
4175 memset(&iwe, 0, sizeof(iwe));
4176 iwe.cmd = IWEVCUSTOM;
4177 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4178 iwe.u.data.length = strlen(buf);
4179 current_ev = iwe_stream_add_point(current_ev, end_buf,
4180 &iwe, buf);
4181 kfree(buf);
4182 }
4183 }
4184
4185 if (bss_mesh_cfg(bss)) {
4186 char *buf;
4187 u8 *cfg = bss_mesh_cfg(bss);
4188 buf = kmalloc(50, GFP_ATOMIC);
4189 if (buf) {
4190 memset(&iwe, 0, sizeof(iwe));
4191 iwe.cmd = IWEVCUSTOM;
4192 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4193 iwe.u.data.length = strlen(buf);
4194 current_ev = iwe_stream_add_point(current_ev, end_buf,
4195 &iwe, buf);
4196 sprintf(buf, "Path Selection Protocol ID: "
4197 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4198 cfg[4]);
4199 iwe.u.data.length = strlen(buf);
4200 current_ev = iwe_stream_add_point(current_ev, end_buf,
4201 &iwe, buf);
4202 sprintf(buf, "Path Selection Metric ID: "
4203 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4204 cfg[8]);
4205 iwe.u.data.length = strlen(buf);
4206 current_ev = iwe_stream_add_point(current_ev, end_buf,
4207 &iwe, buf);
4208 sprintf(buf, "Congestion Control Mode ID: "
4209 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4210 cfg[11], cfg[12]);
4211 iwe.u.data.length = strlen(buf);
4212 current_ev = iwe_stream_add_point(current_ev, end_buf,
4213 &iwe, buf);
4214 sprintf(buf, "Channel Precedence: "
4215 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4216 cfg[15], cfg[16]);
4217 iwe.u.data.length = strlen(buf);
4218 current_ev = iwe_stream_add_point(current_ev, end_buf,
4219 &iwe, buf);
4220 kfree(buf);
4221 }
4222 }
4223
4224 return current_ev;
4225 }
4226
4227
4228 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4229 {
4230 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4231 char *current_ev = buf;
4232 char *end_buf = buf + len;
4233 struct ieee80211_sta_bss *bss;
4234
4235 spin_lock_bh(&local->sta_bss_lock);
4236 list_for_each_entry(bss, &local->sta_bss_list, list) {
4237 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4238 spin_unlock_bh(&local->sta_bss_lock);
4239 return -E2BIG;
4240 }
4241 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4242 end_buf);
4243 }
4244 spin_unlock_bh(&local->sta_bss_lock);
4245 return current_ev - buf;
4246 }
4247
4248
4249 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4250 {
4251 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4252 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4253 kfree(ifsta->extra_ie);
4254 if (len == 0) {
4255 ifsta->extra_ie = NULL;
4256 ifsta->extra_ie_len = 0;
4257 return 0;
4258 }
4259 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4260 if (!ifsta->extra_ie) {
4261 ifsta->extra_ie_len = 0;
4262 return -ENOMEM;
4263 }
4264 memcpy(ifsta->extra_ie, ie, len);
4265 ifsta->extra_ie_len = len;
4266 return 0;
4267 }
4268
4269
4270 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4271 struct sk_buff *skb, u8 *bssid,
4272 u8 *addr)
4273 {
4274 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4275 struct sta_info *sta;
4276 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4277 DECLARE_MAC_BUF(mac);
4278
4279 /* TODO: Could consider removing the least recently used entry and
4280 * allow new one to be added. */
4281 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4282 if (net_ratelimit()) {
4283 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4284 "entry %s\n", dev->name, print_mac(mac, addr));
4285 }
4286 return NULL;
4287 }
4288
4289 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4290 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4291
4292 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4293 if (!sta)
4294 return NULL;
4295
4296 sta->flags |= WLAN_STA_AUTHORIZED;
4297
4298 sta->supp_rates[local->hw.conf.channel->band] =
4299 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4300
4301 rate_control_rate_init(sta, local);
4302
4303 if (sta_info_insert(sta))
4304 return NULL;
4305
4306 return sta;
4307 }
4308
4309
4310 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4311 {
4312 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4313 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4314
4315 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4316 dev->name, reason);
4317
4318 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4319 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4320 return -EINVAL;
4321
4322 ieee80211_send_deauth(dev, ifsta, reason);
4323 ieee80211_set_disassoc(dev, ifsta, 1);
4324 return 0;
4325 }
4326
4327
4328 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4329 {
4330 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4331 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4332
4333 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4334 dev->name, reason);
4335
4336 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4337 return -EINVAL;
4338
4339 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4340 return -1;
4341
4342 ieee80211_send_disassoc(dev, ifsta, reason);
4343 ieee80211_set_disassoc(dev, ifsta, 0);
4344 return 0;
4345 }
4346
4347 void ieee80211_notify_mac(struct ieee80211_hw *hw,
4348 enum ieee80211_notification_types notif_type)
4349 {
4350 struct ieee80211_local *local = hw_to_local(hw);
4351 struct ieee80211_sub_if_data *sdata;
4352
4353 switch (notif_type) {
4354 case IEEE80211_NOTIFY_RE_ASSOC:
4355 rcu_read_lock();
4356 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
4357
4358 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
4359 ieee80211_sta_req_auth(sdata->dev,
4360 &sdata->u.sta);
4361 }
4362
4363 }
4364 rcu_read_unlock();
4365 break;
4366 }
4367 }
4368 EXPORT_SYMBOL(ieee80211_notify_mac);
SocketAccessConTroL development