?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Revert "mac80211: use a struct for bss->mesh_config"
[linux-2.6/mini2440.git] / net / mac80211 / ieee80211_sta.c
blob1ee07f0b02e23d00f9b5b3f133cd9cbeaabf2198
1 /*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 /* TODO:
15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
19 #include <linux/delay.h>
20 #include <linux/if_ether.h>
21 #include <linux/skbuff.h>
22 #include <linux/netdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/wireless.h>
25 #include <linux/random.h>
26 #include <linux/etherdevice.h>
27 #include <linux/rtnetlink.h>
28 #include <net/iw_handler.h>
29 #include <asm/types.h>
30
31 #include <net/mac80211.h>
32 #include "ieee80211_i.h"
33 #include "ieee80211_rate.h"
34 #include "ieee80211_led.h"
35 #include "mesh.h"
36
37 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38 #define IEEE80211_AUTH_MAX_TRIES 3
39 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40 #define IEEE80211_ASSOC_MAX_TRIES 3
41 #define IEEE80211_MONITORING_INTERVAL (2 * HZ)
42 #define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
43 #define IEEE80211_PROBE_INTERVAL (60 * HZ)
44 #define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45 #define IEEE80211_SCAN_INTERVAL (2 * HZ)
46 #define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47 #define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49 #define IEEE80211_PROBE_DELAY (HZ / 33)
50 #define IEEE80211_CHANNEL_TIME (HZ / 33)
51 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53 #define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
55 #define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
56
57 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
60 #define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
61
62 #define ERP_INFO_USE_PROTECTION BIT(1)
63
64 /* mgmt header + 1 byte action code */
65 #define IEEE80211_MIN_ACTION_SIZE (24 + 1)
66
67 #define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
68 #define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
69 #define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
70 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
71 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
72
73 /* next values represent the buffer size for A-MPDU frame.
74 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
75 #define IEEE80211_MIN_AMPDU_BUF 0x8
76 #define IEEE80211_MAX_AMPDU_BUF 0x40
77
78 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
79 u8 *ssid, size_t ssid_len);
80 static struct ieee80211_sta_bss *
81 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
82 u8 *ssid, u8 ssid_len);
83 static void ieee80211_rx_bss_put(struct net_device *dev,
84 struct ieee80211_sta_bss *bss);
85 static int ieee80211_sta_find_ibss(struct net_device *dev,
86 struct ieee80211_if_sta *ifsta);
87 static int ieee80211_sta_wep_configured(struct net_device *dev);
88 static int ieee80211_sta_start_scan(struct net_device *dev,
89 u8 *ssid, size_t ssid_len);
90 static int ieee80211_sta_config_auth(struct net_device *dev,
91 struct ieee80211_if_sta *ifsta);
92
93
94 void ieee802_11_parse_elems(u8 *start, size_t len,
95 struct ieee802_11_elems *elems)
96 {
97 size_t left = len;
98 u8 *pos = start;
99
100 memset(elems, 0, sizeof(*elems));
101
102 while (left >= 2) {
103 u8 id, elen;
104
105 id = *pos++;
106 elen = *pos++;
107 left -= 2;
108
109 if (elen > left)
110 return;
111
112 switch (id) {
113 case WLAN_EID_SSID:
114 elems->ssid = pos;
115 elems->ssid_len = elen;
116 break;
117 case WLAN_EID_SUPP_RATES:
118 elems->supp_rates = pos;
119 elems->supp_rates_len = elen;
120 break;
121 case WLAN_EID_FH_PARAMS:
122 elems->fh_params = pos;
123 elems->fh_params_len = elen;
124 break;
125 case WLAN_EID_DS_PARAMS:
126 elems->ds_params = pos;
127 elems->ds_params_len = elen;
128 break;
129 case WLAN_EID_CF_PARAMS:
130 elems->cf_params = pos;
131 elems->cf_params_len = elen;
132 break;
133 case WLAN_EID_TIM:
134 elems->tim = pos;
135 elems->tim_len = elen;
136 break;
137 case WLAN_EID_IBSS_PARAMS:
138 elems->ibss_params = pos;
139 elems->ibss_params_len = elen;
140 break;
141 case WLAN_EID_CHALLENGE:
142 elems->challenge = pos;
143 elems->challenge_len = elen;
144 break;
145 case WLAN_EID_WPA:
146 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
147 pos[2] == 0xf2) {
148 /* Microsoft OUI (00:50:F2) */
149 if (pos[3] == 1) {
150 /* OUI Type 1 - WPA IE */
151 elems->wpa = pos;
152 elems->wpa_len = elen;
153 } else if (elen >= 5 && pos[3] == 2) {
154 if (pos[4] == 0) {
155 elems->wmm_info = pos;
156 elems->wmm_info_len = elen;
157 } else if (pos[4] == 1) {
158 elems->wmm_param = pos;
159 elems->wmm_param_len = elen;
160 }
161 }
162 }
163 break;
164 case WLAN_EID_RSN:
165 elems->rsn = pos;
166 elems->rsn_len = elen;
167 break;
168 case WLAN_EID_ERP_INFO:
169 elems->erp_info = pos;
170 elems->erp_info_len = elen;
171 break;
172 case WLAN_EID_EXT_SUPP_RATES:
173 elems->ext_supp_rates = pos;
174 elems->ext_supp_rates_len = elen;
175 break;
176 case WLAN_EID_HT_CAPABILITY:
177 elems->ht_cap_elem = pos;
178 elems->ht_cap_elem_len = elen;
179 break;
180 case WLAN_EID_HT_EXTRA_INFO:
181 elems->ht_info_elem = pos;
182 elems->ht_info_elem_len = elen;
183 break;
184 case WLAN_EID_MESH_ID:
185 elems->mesh_id = pos;
186 elems->mesh_id_len = elen;
187 break;
188 case WLAN_EID_MESH_CONFIG:
189 elems->mesh_config = pos;
190 elems->mesh_config_len = elen;
191 break;
192 case WLAN_EID_PEER_LINK:
193 elems->peer_link = pos;
194 elems->peer_link_len = elen;
195 break;
196 case WLAN_EID_PREQ:
197 elems->preq = pos;
198 elems->preq_len = elen;
199 break;
200 case WLAN_EID_PREP:
201 elems->prep = pos;
202 elems->prep_len = elen;
203 break;
204 case WLAN_EID_PERR:
205 elems->perr = pos;
206 elems->perr_len = elen;
207 break;
208 default:
209 break;
210 }
211
212 left -= elen;
213 pos += elen;
214 }
215 }
216
217
218 static int ecw2cw(int ecw)
219 {
220 return (1 << ecw) - 1;
221 }
222
223
224 static void ieee80211_sta_def_wmm_params(struct net_device *dev,
225 struct ieee80211_sta_bss *bss,
226 int ibss)
227 {
228 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
229 struct ieee80211_local *local = sdata->local;
230 int i, have_higher_than_11mbit = 0;
231
232
233 /* cf. IEEE 802.11 9.2.12 */
234 for (i = 0; i < bss->supp_rates_len; i++)
235 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
236 have_higher_than_11mbit = 1;
237
238 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
239 have_higher_than_11mbit)
240 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
241 else
242 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
243
244
245 if (local->ops->conf_tx) {
246 struct ieee80211_tx_queue_params qparam;
247
248 memset(&qparam, 0, sizeof(qparam));
249
250 qparam.aifs = 2;
251
252 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
253 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
254 qparam.cw_min = 31;
255 else
256 qparam.cw_min = 15;
257
258 qparam.cw_max = 1023;
259 qparam.txop = 0;
260
261 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
262 local->ops->conf_tx(local_to_hw(local),
263 i + IEEE80211_TX_QUEUE_DATA0,
264 &qparam);
265
266 if (ibss) {
267 /* IBSS uses different parameters for Beacon sending */
268 qparam.cw_min++;
269 qparam.cw_min *= 2;
270 qparam.cw_min--;
271 local->ops->conf_tx(local_to_hw(local),
272 IEEE80211_TX_QUEUE_BEACON, &qparam);
273 }
274 }
275 }
276
277 static void ieee80211_sta_wmm_params(struct net_device *dev,
278 struct ieee80211_if_sta *ifsta,
279 u8 *wmm_param, size_t wmm_param_len)
280 {
281 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
282 struct ieee80211_tx_queue_params params;
283 size_t left;
284 int count;
285 u8 *pos;
286
287 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
288 return;
289 count = wmm_param[6] & 0x0f;
290 if (count == ifsta->wmm_last_param_set)
291 return;
292 ifsta->wmm_last_param_set = count;
293
294 pos = wmm_param + 8;
295 left = wmm_param_len - 8;
296
297 memset(&params, 0, sizeof(params));
298
299 if (!local->ops->conf_tx)
300 return;
301
302 local->wmm_acm = 0;
303 for (; left >= 4; left -= 4, pos += 4) {
304 int aci = (pos[0] >> 5) & 0x03;
305 int acm = (pos[0] >> 4) & 0x01;
306 int queue;
307
308 switch (aci) {
309 case 1:
310 queue = IEEE80211_TX_QUEUE_DATA3;
311 if (acm) {
312 local->wmm_acm |= BIT(0) | BIT(3);
313 }
314 break;
315 case 2:
316 queue = IEEE80211_TX_QUEUE_DATA1;
317 if (acm) {
318 local->wmm_acm |= BIT(4) | BIT(5);
319 }
320 break;
321 case 3:
322 queue = IEEE80211_TX_QUEUE_DATA0;
323 if (acm) {
324 local->wmm_acm |= BIT(6) | BIT(7);
325 }
326 break;
327 case 0:
328 default:
329 queue = IEEE80211_TX_QUEUE_DATA2;
330 if (acm) {
331 local->wmm_acm |= BIT(1) | BIT(2);
332 }
333 break;
334 }
335
336 params.aifs = pos[0] & 0x0f;
337 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
338 params.cw_min = ecw2cw(pos[1] & 0x0f);
339 params.txop = pos[2] | (pos[3] << 8);
340 #ifdef CONFIG_MAC80211_DEBUG
341 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
342 "cWmin=%d cWmax=%d txop=%d\n",
343 dev->name, queue, aci, acm, params.aifs, params.cw_min,
344 params.cw_max, params.txop);
345 #endif
346 /* TODO: handle ACM (block TX, fallback to next lowest allowed
347 * AC for now) */
348 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
349 printk(KERN_DEBUG "%s: failed to set TX queue "
350 "parameters for queue %d\n", dev->name, queue);
351 }
352 }
353 }
354
355
356 static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
357 u8 erp_value)
358 {
359 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
360 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
361 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
362 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
363 DECLARE_MAC_BUF(mac);
364 u32 changed = 0;
365
366 if (use_protection != bss_conf->use_cts_prot) {
367 if (net_ratelimit()) {
368 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
369 "%s)\n",
370 sdata->dev->name,
371 use_protection ? "enabled" : "disabled",
372 print_mac(mac, ifsta->bssid));
373 }
374 bss_conf->use_cts_prot = use_protection;
375 changed |= BSS_CHANGED_ERP_CTS_PROT;
376 }
377
378 if (use_short_preamble != bss_conf->use_short_preamble) {
379 if (net_ratelimit()) {
380 printk(KERN_DEBUG "%s: switched to %s barker preamble"
381 " (BSSID=%s)\n",
382 sdata->dev->name,
383 use_short_preamble ? "short" : "long",
384 print_mac(mac, ifsta->bssid));
385 }
386 bss_conf->use_short_preamble = use_short_preamble;
387 changed |= BSS_CHANGED_ERP_PREAMBLE;
388 }
389
390 return changed;
391 }
392
393 int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
394 struct ieee80211_ht_info *ht_info)
395 {
396
397 if (ht_info == NULL)
398 return -EINVAL;
399
400 memset(ht_info, 0, sizeof(*ht_info));
401
402 if (ht_cap_ie) {
403 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
404
405 ht_info->ht_supported = 1;
406 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
407 ht_info->ampdu_factor =
408 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
409 ht_info->ampdu_density =
410 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
411 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
412 } else
413 ht_info->ht_supported = 0;
414
415 return 0;
416 }
417
418 int ieee80211_ht_addt_info_ie_to_ht_bss_info(
419 struct ieee80211_ht_addt_info *ht_add_info_ie,
420 struct ieee80211_ht_bss_info *bss_info)
421 {
422 if (bss_info == NULL)
423 return -EINVAL;
424
425 memset(bss_info, 0, sizeof(*bss_info));
426
427 if (ht_add_info_ie) {
428 u16 op_mode;
429 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
430
431 bss_info->primary_channel = ht_add_info_ie->control_chan;
432 bss_info->bss_cap = ht_add_info_ie->ht_param;
433 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
434 }
435
436 return 0;
437 }
438
439 static void ieee80211_sta_send_associnfo(struct net_device *dev,
440 struct ieee80211_if_sta *ifsta)
441 {
442 char *buf;
443 size_t len;
444 int i;
445 union iwreq_data wrqu;
446
447 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
448 return;
449
450 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
451 ifsta->assocresp_ies_len), GFP_KERNEL);
452 if (!buf)
453 return;
454
455 len = sprintf(buf, "ASSOCINFO(");
456 if (ifsta->assocreq_ies) {
457 len += sprintf(buf + len, "ReqIEs=");
458 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
459 len += sprintf(buf + len, "%02x",
460 ifsta->assocreq_ies[i]);
461 }
462 }
463 if (ifsta->assocresp_ies) {
464 if (ifsta->assocreq_ies)
465 len += sprintf(buf + len, " ");
466 len += sprintf(buf + len, "RespIEs=");
467 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
468 len += sprintf(buf + len, "%02x",
469 ifsta->assocresp_ies[i]);
470 }
471 }
472 len += sprintf(buf + len, ")");
473
474 if (len > IW_CUSTOM_MAX) {
475 len = sprintf(buf, "ASSOCRESPIE=");
476 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
477 len += sprintf(buf + len, "%02x",
478 ifsta->assocresp_ies[i]);
479 }
480 }
481
482 memset(&wrqu, 0, sizeof(wrqu));
483 wrqu.data.length = len;
484 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
485
486 kfree(buf);
487 }
488
489
490 static void ieee80211_set_associated(struct net_device *dev,
491 struct ieee80211_if_sta *ifsta,
492 bool assoc)
493 {
494 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
495 struct ieee80211_local *local = sdata->local;
496 union iwreq_data wrqu;
497 u32 changed = BSS_CHANGED_ASSOC;
498
499 if (assoc) {
500 struct ieee80211_sta_bss *bss;
501
502 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
503
504 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
505 return;
506
507 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
508 local->hw.conf.channel->center_freq,
509 ifsta->ssid, ifsta->ssid_len);
510 if (bss) {
511 if (bss->has_erp_value)
512 changed |= ieee80211_handle_erp_ie(
513 sdata, bss->erp_value);
514 ieee80211_rx_bss_put(dev, bss);
515 }
516
517 netif_carrier_on(dev);
518 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
519 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
520 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
521 ieee80211_sta_send_associnfo(dev, ifsta);
522 } else {
523 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
524 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
525 netif_carrier_off(dev);
526 ieee80211_reset_erp_info(dev);
527 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
528 }
529 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
530 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
531 ifsta->last_probe = jiffies;
532 ieee80211_led_assoc(local, assoc);
533
534 sdata->bss_conf.assoc = assoc;
535 ieee80211_bss_info_change_notify(sdata, changed);
536 }
537
538 static void ieee80211_set_disassoc(struct net_device *dev,
539 struct ieee80211_if_sta *ifsta, int deauth)
540 {
541 if (deauth)
542 ifsta->auth_tries = 0;
543 ifsta->assoc_tries = 0;
544 ieee80211_set_associated(dev, ifsta, 0);
545 }
546
547 void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
548 int encrypt)
549 {
550 struct ieee80211_sub_if_data *sdata;
551 struct ieee80211_tx_packet_data *pkt_data;
552
553 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
554 skb->dev = sdata->local->mdev;
555 skb_set_mac_header(skb, 0);
556 skb_set_network_header(skb, 0);
557 skb_set_transport_header(skb, 0);
558
559 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
560 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
561 pkt_data->ifindex = sdata->dev->ifindex;
562 if (!encrypt)
563 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
564
565 dev_queue_xmit(skb);
566 }
567
568
569 static void ieee80211_send_auth(struct net_device *dev,
570 struct ieee80211_if_sta *ifsta,
571 int transaction, u8 *extra, size_t extra_len,
572 int encrypt)
573 {
574 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
575 struct sk_buff *skb;
576 struct ieee80211_mgmt *mgmt;
577
578 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
579 sizeof(*mgmt) + 6 + extra_len);
580 if (!skb) {
581 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
582 "frame\n", dev->name);
583 return;
584 }
585 skb_reserve(skb, local->hw.extra_tx_headroom);
586
587 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
588 memset(mgmt, 0, 24 + 6);
589 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
590 IEEE80211_STYPE_AUTH);
591 if (encrypt)
592 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
593 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
594 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
595 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
596 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
597 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
598 ifsta->auth_transaction = transaction + 1;
599 mgmt->u.auth.status_code = cpu_to_le16(0);
600 if (extra)
601 memcpy(skb_put(skb, extra_len), extra, extra_len);
602
603 ieee80211_sta_tx(dev, skb, encrypt);
604 }
605
606
607 static void ieee80211_authenticate(struct net_device *dev,
608 struct ieee80211_if_sta *ifsta)
609 {
610 DECLARE_MAC_BUF(mac);
611
612 ifsta->auth_tries++;
613 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
614 printk(KERN_DEBUG "%s: authentication with AP %s"
615 " timed out\n",
616 dev->name, print_mac(mac, ifsta->bssid));
617 ifsta->state = IEEE80211_DISABLED;
618 return;
619 }
620
621 ifsta->state = IEEE80211_AUTHENTICATE;
622 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
623 dev->name, print_mac(mac, ifsta->bssid));
624
625 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
626
627 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
628 }
629
630
631 static void ieee80211_send_assoc(struct net_device *dev,
632 struct ieee80211_if_sta *ifsta)
633 {
634 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
635 struct sk_buff *skb;
636 struct ieee80211_mgmt *mgmt;
637 u8 *pos, *ies;
638 int i, len;
639 u16 capab;
640 struct ieee80211_sta_bss *bss;
641 int wmm = 0;
642 struct ieee80211_supported_band *sband;
643
644 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
645 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
646 ifsta->ssid_len);
647 if (!skb) {
648 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
649 "frame\n", dev->name);
650 return;
651 }
652 skb_reserve(skb, local->hw.extra_tx_headroom);
653
654 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
655
656 capab = ifsta->capab;
657
658 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
659 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
660 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
661 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
662 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
663 }
664
665 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
666 local->hw.conf.channel->center_freq,
667 ifsta->ssid, ifsta->ssid_len);
668 if (bss) {
669 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
670 capab |= WLAN_CAPABILITY_PRIVACY;
671 if (bss->wmm_ie) {
672 wmm = 1;
673 }
674 ieee80211_rx_bss_put(dev, bss);
675 }
676
677 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
678 memset(mgmt, 0, 24);
679 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
680 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
681 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
682
683 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
684 skb_put(skb, 10);
685 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
686 IEEE80211_STYPE_REASSOC_REQ);
687 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
688 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
689 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
690 ETH_ALEN);
691 } else {
692 skb_put(skb, 4);
693 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
694 IEEE80211_STYPE_ASSOC_REQ);
695 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
696 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
697 }
698
699 /* SSID */
700 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
701 *pos++ = WLAN_EID_SSID;
702 *pos++ = ifsta->ssid_len;
703 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
704
705 len = sband->n_bitrates;
706 if (len > 8)
707 len = 8;
708 pos = skb_put(skb, len + 2);
709 *pos++ = WLAN_EID_SUPP_RATES;
710 *pos++ = len;
711 for (i = 0; i < len; i++) {
712 int rate = sband->bitrates[i].bitrate;
713 *pos++ = (u8) (rate / 5);
714 }
715
716 if (sband->n_bitrates > len) {
717 pos = skb_put(skb, sband->n_bitrates - len + 2);
718 *pos++ = WLAN_EID_EXT_SUPP_RATES;
719 *pos++ = sband->n_bitrates - len;
720 for (i = len; i < sband->n_bitrates; i++) {
721 int rate = sband->bitrates[i].bitrate;
722 *pos++ = (u8) (rate / 5);
723 }
724 }
725
726 if (ifsta->extra_ie) {
727 pos = skb_put(skb, ifsta->extra_ie_len);
728 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
729 }
730
731 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
732 pos = skb_put(skb, 9);
733 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
734 *pos++ = 7; /* len */
735 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
736 *pos++ = 0x50;
737 *pos++ = 0xf2;
738 *pos++ = 2; /* WME */
739 *pos++ = 0; /* WME info */
740 *pos++ = 1; /* WME ver */
741 *pos++ = 0;
742 }
743 /* wmm support is a must to HT */
744 if (wmm && sband->ht_info.ht_supported) {
745 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
746 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
747 *pos++ = WLAN_EID_HT_CAPABILITY;
748 *pos++ = sizeof(struct ieee80211_ht_cap);
749 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
750 memcpy(pos, &tmp, sizeof(u16));
751 pos += sizeof(u16);
752 /* TODO: needs a define here for << 2 */
753 *pos++ = sband->ht_info.ampdu_factor |
754 (sband->ht_info.ampdu_density << 2);
755 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
756 }
757
758 kfree(ifsta->assocreq_ies);
759 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
760 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
761 if (ifsta->assocreq_ies)
762 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
763
764 ieee80211_sta_tx(dev, skb, 0);
765 }
766
767
768 static void ieee80211_send_deauth(struct net_device *dev,
769 struct ieee80211_if_sta *ifsta, u16 reason)
770 {
771 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
772 struct sk_buff *skb;
773 struct ieee80211_mgmt *mgmt;
774
775 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
776 if (!skb) {
777 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
778 "frame\n", dev->name);
779 return;
780 }
781 skb_reserve(skb, local->hw.extra_tx_headroom);
782
783 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
784 memset(mgmt, 0, 24);
785 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
786 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
787 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
788 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
789 IEEE80211_STYPE_DEAUTH);
790 skb_put(skb, 2);
791 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
792
793 ieee80211_sta_tx(dev, skb, 0);
794 }
795
796
797 static void ieee80211_send_disassoc(struct net_device *dev,
798 struct ieee80211_if_sta *ifsta, u16 reason)
799 {
800 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
801 struct sk_buff *skb;
802 struct ieee80211_mgmt *mgmt;
803
804 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
805 if (!skb) {
806 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
807 "frame\n", dev->name);
808 return;
809 }
810 skb_reserve(skb, local->hw.extra_tx_headroom);
811
812 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
813 memset(mgmt, 0, 24);
814 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
815 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
816 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
817 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
818 IEEE80211_STYPE_DISASSOC);
819 skb_put(skb, 2);
820 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
821
822 ieee80211_sta_tx(dev, skb, 0);
823 }
824
825
826 static int ieee80211_privacy_mismatch(struct net_device *dev,
827 struct ieee80211_if_sta *ifsta)
828 {
829 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
830 struct ieee80211_sta_bss *bss;
831 int bss_privacy;
832 int wep_privacy;
833 int privacy_invoked;
834
835 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
836 return 0;
837
838 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
839 local->hw.conf.channel->center_freq,
840 ifsta->ssid, ifsta->ssid_len);
841 if (!bss)
842 return 0;
843
844 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
845 wep_privacy = !!ieee80211_sta_wep_configured(dev);
846 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
847
848 ieee80211_rx_bss_put(dev, bss);
849
850 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
851 return 0;
852
853 return 1;
854 }
855
856
857 static void ieee80211_associate(struct net_device *dev,
858 struct ieee80211_if_sta *ifsta)
859 {
860 DECLARE_MAC_BUF(mac);
861
862 ifsta->assoc_tries++;
863 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
864 printk(KERN_DEBUG "%s: association with AP %s"
865 " timed out\n",
866 dev->name, print_mac(mac, ifsta->bssid));
867 ifsta->state = IEEE80211_DISABLED;
868 return;
869 }
870
871 ifsta->state = IEEE80211_ASSOCIATE;
872 printk(KERN_DEBUG "%s: associate with AP %s\n",
873 dev->name, print_mac(mac, ifsta->bssid));
874 if (ieee80211_privacy_mismatch(dev, ifsta)) {
875 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
876 "mixed-cell disabled - abort association\n", dev->name);
877 ifsta->state = IEEE80211_DISABLED;
878 return;
879 }
880
881 ieee80211_send_assoc(dev, ifsta);
882
883 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
884 }
885
886
887 static void ieee80211_associated(struct net_device *dev,
888 struct ieee80211_if_sta *ifsta)
889 {
890 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
891 struct sta_info *sta;
892 int disassoc;
893 DECLARE_MAC_BUF(mac);
894
895 /* TODO: start monitoring current AP signal quality and number of
896 * missed beacons. Scan other channels every now and then and search
897 * for better APs. */
898 /* TODO: remove expired BSSes */
899
900 ifsta->state = IEEE80211_ASSOCIATED;
901
902 rcu_read_lock();
903
904 sta = sta_info_get(local, ifsta->bssid);
905 if (!sta) {
906 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
907 dev->name, print_mac(mac, ifsta->bssid));
908 disassoc = 1;
909 } else {
910 disassoc = 0;
911 if (time_after(jiffies,
912 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
913 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
914 printk(KERN_DEBUG "%s: No ProbeResp from "
915 "current AP %s - assume out of "
916 "range\n",
917 dev->name, print_mac(mac, ifsta->bssid));
918 disassoc = 1;
919 sta_info_unlink(&sta);
920 } else
921 ieee80211_send_probe_req(dev, ifsta->bssid,
922 local->scan_ssid,
923 local->scan_ssid_len);
924 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
925 } else {
926 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
927 if (time_after(jiffies, ifsta->last_probe +
928 IEEE80211_PROBE_INTERVAL)) {
929 ifsta->last_probe = jiffies;
930 ieee80211_send_probe_req(dev, ifsta->bssid,
931 ifsta->ssid,
932 ifsta->ssid_len);
933 }
934 }
935 }
936
937 rcu_read_unlock();
938
939 if (disassoc && sta) {
940 rtnl_lock();
941 sta_info_destroy(sta);
942 rtnl_unlock();
943 }
944
945 if (disassoc) {
946 ifsta->state = IEEE80211_DISABLED;
947 ieee80211_set_associated(dev, ifsta, 0);
948 } else {
949 mod_timer(&ifsta->timer, jiffies +
950 IEEE80211_MONITORING_INTERVAL);
951 }
952 }
953
954
955 static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
956 u8 *ssid, size_t ssid_len)
957 {
958 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
959 struct ieee80211_supported_band *sband;
960 struct sk_buff *skb;
961 struct ieee80211_mgmt *mgmt;
962 u8 *pos, *supp_rates, *esupp_rates = NULL;
963 int i;
964
965 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
966 if (!skb) {
967 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
968 "request\n", dev->name);
969 return;
970 }
971 skb_reserve(skb, local->hw.extra_tx_headroom);
972
973 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
974 memset(mgmt, 0, 24);
975 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
976 IEEE80211_STYPE_PROBE_REQ);
977 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
978 if (dst) {
979 memcpy(mgmt->da, dst, ETH_ALEN);
980 memcpy(mgmt->bssid, dst, ETH_ALEN);
981 } else {
982 memset(mgmt->da, 0xff, ETH_ALEN);
983 memset(mgmt->bssid, 0xff, ETH_ALEN);
984 }
985 pos = skb_put(skb, 2 + ssid_len);
986 *pos++ = WLAN_EID_SSID;
987 *pos++ = ssid_len;
988 memcpy(pos, ssid, ssid_len);
989
990 supp_rates = skb_put(skb, 2);
991 supp_rates[0] = WLAN_EID_SUPP_RATES;
992 supp_rates[1] = 0;
993 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
994
995 for (i = 0; i < sband->n_bitrates; i++) {
996 struct ieee80211_rate *rate = &sband->bitrates[i];
997 if (esupp_rates) {
998 pos = skb_put(skb, 1);
999 esupp_rates[1]++;
1000 } else if (supp_rates[1] == 8) {
1001 esupp_rates = skb_put(skb, 3);
1002 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1003 esupp_rates[1] = 1;
1004 pos = &esupp_rates[2];
1005 } else {
1006 pos = skb_put(skb, 1);
1007 supp_rates[1]++;
1008 }
1009 *pos = rate->bitrate / 5;
1010 }
1011
1012 ieee80211_sta_tx(dev, skb, 0);
1013 }
1014
1015
1016 static int ieee80211_sta_wep_configured(struct net_device *dev)
1017 {
1018 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1019 if (!sdata || !sdata->default_key ||
1020 sdata->default_key->conf.alg != ALG_WEP)
1021 return 0;
1022 return 1;
1023 }
1024
1025
1026 static void ieee80211_auth_completed(struct net_device *dev,
1027 struct ieee80211_if_sta *ifsta)
1028 {
1029 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
1030 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
1031 ieee80211_associate(dev, ifsta);
1032 }
1033
1034
1035 static void ieee80211_auth_challenge(struct net_device *dev,
1036 struct ieee80211_if_sta *ifsta,
1037 struct ieee80211_mgmt *mgmt,
1038 size_t len)
1039 {
1040 u8 *pos;
1041 struct ieee802_11_elems elems;
1042
1043 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1044 pos = mgmt->u.auth.variable;
1045 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1046 if (!elems.challenge) {
1047 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1048 "frame\n", dev->name);
1049 return;
1050 }
1051 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1052 elems.challenge_len + 2, 1);
1053 }
1054
1055 static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1056 u8 dialog_token, u16 status, u16 policy,
1057 u16 buf_size, u16 timeout)
1058 {
1059 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1060 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1061 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1062 struct sk_buff *skb;
1063 struct ieee80211_mgmt *mgmt;
1064 u16 capab;
1065
1066 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1067 sizeof(mgmt->u.action.u.addba_resp));
1068 if (!skb) {
1069 printk(KERN_DEBUG "%s: failed to allocate buffer "
1070 "for addba resp frame\n", dev->name);
1071 return;
1072 }
1073
1074 skb_reserve(skb, local->hw.extra_tx_headroom);
1075 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1076 memset(mgmt, 0, 24);
1077 memcpy(mgmt->da, da, ETH_ALEN);
1078 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1079 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1080 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1081 else
1082 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1083 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1084 IEEE80211_STYPE_ACTION);
1085
1086 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1087 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1088 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1089 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1090
1091 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1092 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1093 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1094
1095 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1096 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1097 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1098
1099 ieee80211_sta_tx(dev, skb, 0);
1100
1101 return;
1102 }
1103
1104 void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1105 u16 tid, u8 dialog_token, u16 start_seq_num,
1106 u16 agg_size, u16 timeout)
1107 {
1108 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1109 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1110 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1111 struct sk_buff *skb;
1112 struct ieee80211_mgmt *mgmt;
1113 u16 capab;
1114
1115 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1116 sizeof(mgmt->u.action.u.addba_req));
1117
1118
1119 if (!skb) {
1120 printk(KERN_ERR "%s: failed to allocate buffer "
1121 "for addba request frame\n", dev->name);
1122 return;
1123 }
1124 skb_reserve(skb, local->hw.extra_tx_headroom);
1125 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1126 memset(mgmt, 0, 24);
1127 memcpy(mgmt->da, da, ETH_ALEN);
1128 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1129 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1130 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1131 else
1132 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1133
1134 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1135 IEEE80211_STYPE_ACTION);
1136
1137 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1138
1139 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1140 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1141
1142 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1143 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1144 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1145 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1146
1147 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1148
1149 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1150 mgmt->u.action.u.addba_req.start_seq_num =
1151 cpu_to_le16(start_seq_num << 4);
1152
1153 ieee80211_sta_tx(dev, skb, 0);
1154 }
1155
1156 static void ieee80211_sta_process_addba_request(struct net_device *dev,
1157 struct ieee80211_mgmt *mgmt,
1158 size_t len)
1159 {
1160 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1161 struct ieee80211_hw *hw = &local->hw;
1162 struct ieee80211_conf *conf = &hw->conf;
1163 struct sta_info *sta;
1164 struct tid_ampdu_rx *tid_agg_rx;
1165 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
1166 u8 dialog_token;
1167 int ret = -EOPNOTSUPP;
1168 DECLARE_MAC_BUF(mac);
1169
1170 rcu_read_lock();
1171
1172 sta = sta_info_get(local, mgmt->sa);
1173 if (!sta) {
1174 rcu_read_unlock();
1175 return;
1176 }
1177
1178 /* extract session parameters from addba request frame */
1179 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1180 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
1181 start_seq_num =
1182 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
1183
1184 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1185 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1186 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1187 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1188
1189 status = WLAN_STATUS_REQUEST_DECLINED;
1190
1191 /* sanity check for incoming parameters:
1192 * check if configuration can support the BA policy
1193 * and if buffer size does not exceeds max value */
1194 if (((ba_policy != 1)
1195 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1196 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1197 status = WLAN_STATUS_INVALID_QOS_PARAM;
1198 #ifdef CONFIG_MAC80211_HT_DEBUG
1199 if (net_ratelimit())
1200 printk(KERN_DEBUG "AddBA Req with bad params from "
1201 "%s on tid %u. policy %d, buffer size %d\n",
1202 print_mac(mac, mgmt->sa), tid, ba_policy,
1203 buf_size);
1204 #endif /* CONFIG_MAC80211_HT_DEBUG */
1205 goto end_no_lock;
1206 }
1207 /* determine default buffer size */
1208 if (buf_size == 0) {
1209 struct ieee80211_supported_band *sband;
1210
1211 sband = local->hw.wiphy->bands[conf->channel->band];
1212 buf_size = IEEE80211_MIN_AMPDU_BUF;
1213 buf_size = buf_size << sband->ht_info.ampdu_factor;
1214 }
1215
1216
1217 /* examine state machine */
1218 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1219
1220 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
1221 #ifdef CONFIG_MAC80211_HT_DEBUG
1222 if (net_ratelimit())
1223 printk(KERN_DEBUG "unexpected AddBA Req from "
1224 "%s on tid %u\n",
1225 print_mac(mac, mgmt->sa), tid);
1226 #endif /* CONFIG_MAC80211_HT_DEBUG */
1227 goto end;
1228 }
1229
1230 /* prepare A-MPDU MLME for Rx aggregation */
1231 sta->ampdu_mlme.tid_rx[tid] =
1232 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1233 if (!sta->ampdu_mlme.tid_rx[tid]) {
1234 if (net_ratelimit())
1235 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1236 tid);
1237 goto end;
1238 }
1239 /* rx timer */
1240 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1241 sta_rx_agg_session_timer_expired;
1242 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1243 (unsigned long)&sta->timer_to_tid[tid];
1244 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1245
1246 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1247
1248 /* prepare reordering buffer */
1249 tid_agg_rx->reorder_buf =
1250 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1251 if (!tid_agg_rx->reorder_buf) {
1252 if (net_ratelimit())
1253 printk(KERN_ERR "can not allocate reordering buffer "
1254 "to tid %d\n", tid);
1255 kfree(sta->ampdu_mlme.tid_rx[tid]);
1256 goto end;
1257 }
1258 memset(tid_agg_rx->reorder_buf, 0,
1259 buf_size * sizeof(struct sk_buf *));
1260
1261 if (local->ops->ampdu_action)
1262 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1263 sta->addr, tid, &start_seq_num);
1264 #ifdef CONFIG_MAC80211_HT_DEBUG
1265 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1266 #endif /* CONFIG_MAC80211_HT_DEBUG */
1267
1268 if (ret) {
1269 kfree(tid_agg_rx->reorder_buf);
1270 kfree(tid_agg_rx);
1271 sta->ampdu_mlme.tid_rx[tid] = NULL;
1272 goto end;
1273 }
1274
1275 /* change state and send addba resp */
1276 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
1277 tid_agg_rx->dialog_token = dialog_token;
1278 tid_agg_rx->ssn = start_seq_num;
1279 tid_agg_rx->head_seq_num = start_seq_num;
1280 tid_agg_rx->buf_size = buf_size;
1281 tid_agg_rx->timeout = timeout;
1282 tid_agg_rx->stored_mpdu_num = 0;
1283 status = WLAN_STATUS_SUCCESS;
1284 end:
1285 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1286
1287 end_no_lock:
1288 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1289 dialog_token, status, 1, buf_size, timeout);
1290 rcu_read_unlock();
1291 }
1292
1293 static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1294 struct ieee80211_mgmt *mgmt,
1295 size_t len)
1296 {
1297 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1298 struct ieee80211_hw *hw = &local->hw;
1299 struct sta_info *sta;
1300 u16 capab;
1301 u16 tid;
1302 u8 *state;
1303
1304 rcu_read_lock();
1305
1306 sta = sta_info_get(local, mgmt->sa);
1307 if (!sta) {
1308 rcu_read_unlock();
1309 return;
1310 }
1311
1312 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1313 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1314
1315 state = &sta->ampdu_mlme.tid_state_tx[tid];
1316
1317 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1318
1319 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1320 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1321 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1322 "%d\n", *state);
1323 goto addba_resp_exit;
1324 }
1325
1326 if (mgmt->u.action.u.addba_resp.dialog_token !=
1327 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
1328 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1329 #ifdef CONFIG_MAC80211_HT_DEBUG
1330 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1331 #endif /* CONFIG_MAC80211_HT_DEBUG */
1332 goto addba_resp_exit;
1333 }
1334
1335 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
1336 #ifdef CONFIG_MAC80211_HT_DEBUG
1337 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1338 #endif /* CONFIG_MAC80211_HT_DEBUG */
1339 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1340 == WLAN_STATUS_SUCCESS) {
1341 if (*state & HT_ADDBA_RECEIVED_MSK)
1342 printk(KERN_DEBUG "double addBA response\n");
1343
1344 *state |= HT_ADDBA_RECEIVED_MSK;
1345 sta->ampdu_mlme.addba_req_num[tid] = 0;
1346
1347 if (*state == HT_AGG_STATE_OPERATIONAL) {
1348 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1349 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1350 }
1351
1352 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1353 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1354 } else {
1355 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1356
1357 sta->ampdu_mlme.addba_req_num[tid]++;
1358 /* this will allow the state check in stop_BA_session */
1359 *state = HT_AGG_STATE_OPERATIONAL;
1360 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1361 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1362 WLAN_BACK_INITIATOR);
1363 }
1364
1365 addba_resp_exit:
1366 rcu_read_unlock();
1367 }
1368
1369 void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1370 u16 initiator, u16 reason_code)
1371 {
1372 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1373 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1374 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1375 struct sk_buff *skb;
1376 struct ieee80211_mgmt *mgmt;
1377 u16 params;
1378
1379 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1380 sizeof(mgmt->u.action.u.delba));
1381
1382 if (!skb) {
1383 printk(KERN_ERR "%s: failed to allocate buffer "
1384 "for delba frame\n", dev->name);
1385 return;
1386 }
1387
1388 skb_reserve(skb, local->hw.extra_tx_headroom);
1389 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1390 memset(mgmt, 0, 24);
1391 memcpy(mgmt->da, da, ETH_ALEN);
1392 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1393 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1394 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1395 else
1396 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1397 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1398 IEEE80211_STYPE_ACTION);
1399
1400 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1401
1402 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1403 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1404 params = (u16)(initiator << 11); /* bit 11 initiator */
1405 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1406
1407 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1408 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1409
1410 ieee80211_sta_tx(dev, skb, 0);
1411 }
1412
1413 void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1414 u16 initiator, u16 reason)
1415 {
1416 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1417 struct ieee80211_hw *hw = &local->hw;
1418 struct sta_info *sta;
1419 int ret, i;
1420
1421 rcu_read_lock();
1422
1423 sta = sta_info_get(local, ra);
1424 if (!sta) {
1425 rcu_read_unlock();
1426 return;
1427 }
1428
1429 /* check if TID is in operational state */
1430 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1431 if (sta->ampdu_mlme.tid_state_rx[tid]
1432 != HT_AGG_STATE_OPERATIONAL) {
1433 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1434 rcu_read_unlock();
1435 return;
1436 }
1437 sta->ampdu_mlme.tid_state_rx[tid] =
1438 HT_AGG_STATE_REQ_STOP_BA_MSK |
1439 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1440 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1441
1442 /* stop HW Rx aggregation. ampdu_action existence
1443 * already verified in session init so we add the BUG_ON */
1444 BUG_ON(!local->ops->ampdu_action);
1445
1446 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1447 ra, tid, NULL);
1448 if (ret)
1449 printk(KERN_DEBUG "HW problem - can not stop rx "
1450 "aggergation for tid %d\n", tid);
1451
1452 /* shutdown timer has not expired */
1453 if (initiator != WLAN_BACK_TIMER)
1454 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1455
1456 /* check if this is a self generated aggregation halt */
1457 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1458 ieee80211_send_delba(dev, ra, tid, 0, reason);
1459
1460 /* free the reordering buffer */
1461 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1462 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
1463 /* release the reordered frames */
1464 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1465 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1466 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
1467 }
1468 }
1469 /* free resources */
1470 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1471 kfree(sta->ampdu_mlme.tid_rx[tid]);
1472 sta->ampdu_mlme.tid_rx[tid] = NULL;
1473 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
1474
1475 rcu_read_unlock();
1476 }
1477
1478
1479 static void ieee80211_sta_process_delba(struct net_device *dev,
1480 struct ieee80211_mgmt *mgmt, size_t len)
1481 {
1482 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1483 struct sta_info *sta;
1484 u16 tid, params;
1485 u16 initiator;
1486 DECLARE_MAC_BUF(mac);
1487
1488 rcu_read_lock();
1489
1490 sta = sta_info_get(local, mgmt->sa);
1491 if (!sta) {
1492 rcu_read_unlock();
1493 return;
1494 }
1495
1496 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1497 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1498 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1499
1500 #ifdef CONFIG_MAC80211_HT_DEBUG
1501 if (net_ratelimit())
1502 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1503 print_mac(mac, mgmt->sa),
1504 initiator ? "initiator" : "recipient", tid,
1505 mgmt->u.action.u.delba.reason_code);
1506 #endif /* CONFIG_MAC80211_HT_DEBUG */
1507
1508 if (initiator == WLAN_BACK_INITIATOR)
1509 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1510 WLAN_BACK_INITIATOR, 0);
1511 else { /* WLAN_BACK_RECIPIENT */
1512 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1513 sta->ampdu_mlme.tid_state_tx[tid] =
1514 HT_AGG_STATE_OPERATIONAL;
1515 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1516 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1517 WLAN_BACK_RECIPIENT);
1518 }
1519 rcu_read_unlock();
1520 }
1521
1522 /*
1523 * After sending add Block Ack request we activated a timer until
1524 * add Block Ack response will arrive from the recipient.
1525 * If this timer expires sta_addba_resp_timer_expired will be executed.
1526 */
1527 void sta_addba_resp_timer_expired(unsigned long data)
1528 {
1529 /* not an elegant detour, but there is no choice as the timer passes
1530 * only one argument, and both sta_info and TID are needed, so init
1531 * flow in sta_info_create gives the TID as data, while the timer_to_id
1532 * array gives the sta through container_of */
1533 u16 tid = *(int *)data;
1534 struct sta_info *temp_sta = container_of((void *)data,
1535 struct sta_info, timer_to_tid[tid]);
1536
1537 struct ieee80211_local *local = temp_sta->local;
1538 struct ieee80211_hw *hw = &local->hw;
1539 struct sta_info *sta;
1540 u8 *state;
1541
1542 rcu_read_lock();
1543
1544 sta = sta_info_get(local, temp_sta->addr);
1545 if (!sta) {
1546 rcu_read_unlock();
1547 return;
1548 }
1549
1550 state = &sta->ampdu_mlme.tid_state_tx[tid];
1551 /* check if the TID waits for addBA response */
1552 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1553 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1554 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1555 *state = HT_AGG_STATE_IDLE;
1556 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1557 "expecting addBA response there", tid);
1558 goto timer_expired_exit;
1559 }
1560
1561 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1562
1563 /* go through the state check in stop_BA_session */
1564 *state = HT_AGG_STATE_OPERATIONAL;
1565 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1566 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1567 WLAN_BACK_INITIATOR);
1568
1569 timer_expired_exit:
1570 rcu_read_unlock();
1571 }
1572
1573 /*
1574 * After accepting the AddBA Request we activated a timer,
1575 * resetting it after each frame that arrives from the originator.
1576 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1577 */
1578 void sta_rx_agg_session_timer_expired(unsigned long data)
1579 {
1580 /* not an elegant detour, but there is no choice as the timer passes
1581 * only one argument, and verious sta_info are needed here, so init
1582 * flow in sta_info_create gives the TID as data, while the timer_to_id
1583 * array gives the sta through container_of */
1584 u8 *ptid = (u8 *)data;
1585 u8 *timer_to_id = ptid - *ptid;
1586 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1587 timer_to_tid[0]);
1588
1589 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1590 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1591 (u16)*ptid, WLAN_BACK_TIMER,
1592 WLAN_REASON_QSTA_TIMEOUT);
1593 }
1594
1595 void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1596 {
1597 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1598 int i;
1599
1600 for (i = 0; i < STA_TID_NUM; i++) {
1601 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1602 WLAN_BACK_INITIATOR);
1603 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1604 WLAN_BACK_RECIPIENT,
1605 WLAN_REASON_QSTA_LEAVE_QBSS);
1606 }
1607 }
1608
1609 static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1610 struct ieee80211_if_sta *ifsta,
1611 struct ieee80211_mgmt *mgmt,
1612 size_t len)
1613 {
1614 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1615 u16 auth_alg, auth_transaction, status_code;
1616 DECLARE_MAC_BUF(mac);
1617
1618 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1619 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
1620 printk(KERN_DEBUG "%s: authentication frame received from "
1621 "%s, but not in authenticate state - ignored\n",
1622 dev->name, print_mac(mac, mgmt->sa));
1623 return;
1624 }
1625
1626 if (len < 24 + 6) {
1627 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
1628 "received from %s - ignored\n",
1629 dev->name, len, print_mac(mac, mgmt->sa));
1630 return;
1631 }
1632
1633 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1634 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1635 printk(KERN_DEBUG "%s: authentication frame received from "
1636 "unknown AP (SA=%s BSSID=%s) - "
1637 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1638 print_mac(mac, mgmt->bssid));
1639 return;
1640 }
1641
1642 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
1643 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1644 printk(KERN_DEBUG "%s: authentication frame received from "
1645 "unknown BSSID (SA=%s BSSID=%s) - "
1646 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1647 print_mac(mac, mgmt->bssid));
1648 return;
1649 }
1650
1651 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1652 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1653 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1654
1655 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
1656 "transaction=%d status=%d)\n",
1657 dev->name, print_mac(mac, mgmt->sa), auth_alg,
1658 auth_transaction, status_code);
1659
1660 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1661 /* IEEE 802.11 standard does not require authentication in IBSS
1662 * networks and most implementations do not seem to use it.
1663 * However, try to reply to authentication attempts if someone
1664 * has actually implemented this.
1665 * TODO: Could implement shared key authentication. */
1666 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1667 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1668 "frame (alg=%d transaction=%d)\n",
1669 dev->name, auth_alg, auth_transaction);
1670 return;
1671 }
1672 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1673 }
1674
1675 if (auth_alg != ifsta->auth_alg ||
1676 auth_transaction != ifsta->auth_transaction) {
1677 printk(KERN_DEBUG "%s: unexpected authentication frame "
1678 "(alg=%d transaction=%d)\n",
1679 dev->name, auth_alg, auth_transaction);
1680 return;
1681 }
1682
1683 if (status_code != WLAN_STATUS_SUCCESS) {
1684 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1685 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1686 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1687 u8 algs[3];
1688 const int num_algs = ARRAY_SIZE(algs);
1689 int i, pos;
1690 algs[0] = algs[1] = algs[2] = 0xff;
1691 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1692 algs[0] = WLAN_AUTH_OPEN;
1693 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1694 algs[1] = WLAN_AUTH_SHARED_KEY;
1695 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1696 algs[2] = WLAN_AUTH_LEAP;
1697 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1698 pos = 0;
1699 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1700 pos = 1;
1701 else
1702 pos = 2;
1703 for (i = 0; i < num_algs; i++) {
1704 pos++;
1705 if (pos >= num_algs)
1706 pos = 0;
1707 if (algs[pos] == ifsta->auth_alg ||
1708 algs[pos] == 0xff)
1709 continue;
1710 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1711 !ieee80211_sta_wep_configured(dev))
1712 continue;
1713 ifsta->auth_alg = algs[pos];
1714 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1715 "next try\n",
1716 dev->name, ifsta->auth_alg);
1717 break;
1718 }
1719 }
1720 return;
1721 }
1722
1723 switch (ifsta->auth_alg) {
1724 case WLAN_AUTH_OPEN:
1725 case WLAN_AUTH_LEAP:
1726 ieee80211_auth_completed(dev, ifsta);
1727 break;
1728 case WLAN_AUTH_SHARED_KEY:
1729 if (ifsta->auth_transaction == 4)
1730 ieee80211_auth_completed(dev, ifsta);
1731 else
1732 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1733 break;
1734 }
1735 }
1736
1737
1738 static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1739 struct ieee80211_if_sta *ifsta,
1740 struct ieee80211_mgmt *mgmt,
1741 size_t len)
1742 {
1743 u16 reason_code;
1744 DECLARE_MAC_BUF(mac);
1745
1746 if (len < 24 + 2) {
1747 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
1748 "received from %s - ignored\n",
1749 dev->name, len, print_mac(mac, mgmt->sa));
1750 return;
1751 }
1752
1753 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1754 printk(KERN_DEBUG "%s: deauthentication frame received from "
1755 "unknown AP (SA=%s BSSID=%s) - "
1756 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1757 print_mac(mac, mgmt->bssid));
1758 return;
1759 }
1760
1761 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1762
1763 printk(KERN_DEBUG "%s: RX deauthentication from %s"
1764 " (reason=%d)\n",
1765 dev->name, print_mac(mac, mgmt->sa), reason_code);
1766
1767 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
1768 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1769 }
1770
1771 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1772 ifsta->state == IEEE80211_ASSOCIATE ||
1773 ifsta->state == IEEE80211_ASSOCIATED) {
1774 ifsta->state = IEEE80211_AUTHENTICATE;
1775 mod_timer(&ifsta->timer, jiffies +
1776 IEEE80211_RETRY_AUTH_INTERVAL);
1777 }
1778
1779 ieee80211_set_disassoc(dev, ifsta, 1);
1780 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
1781 }
1782
1783
1784 static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1785 struct ieee80211_if_sta *ifsta,
1786 struct ieee80211_mgmt *mgmt,
1787 size_t len)
1788 {
1789 u16 reason_code;
1790 DECLARE_MAC_BUF(mac);
1791
1792 if (len < 24 + 2) {
1793 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
1794 "received from %s - ignored\n",
1795 dev->name, len, print_mac(mac, mgmt->sa));
1796 return;
1797 }
1798
1799 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1800 printk(KERN_DEBUG "%s: disassociation frame received from "
1801 "unknown AP (SA=%s BSSID=%s) - "
1802 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1803 print_mac(mac, mgmt->bssid));
1804 return;
1805 }
1806
1807 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1808
1809 printk(KERN_DEBUG "%s: RX disassociation from %s"
1810 " (reason=%d)\n",
1811 dev->name, print_mac(mac, mgmt->sa), reason_code);
1812
1813 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
1814 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1815
1816 if (ifsta->state == IEEE80211_ASSOCIATED) {
1817 ifsta->state = IEEE80211_ASSOCIATE;
1818 mod_timer(&ifsta->timer, jiffies +
1819 IEEE80211_RETRY_AUTH_INTERVAL);
1820 }
1821
1822 ieee80211_set_disassoc(dev, ifsta, 0);
1823 }
1824
1825
1826 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
1827 struct ieee80211_if_sta *ifsta,
1828 struct ieee80211_mgmt *mgmt,
1829 size_t len,
1830 int reassoc)
1831 {
1832 struct ieee80211_local *local = sdata->local;
1833 struct net_device *dev = sdata->dev;
1834 struct ieee80211_supported_band *sband;
1835 struct sta_info *sta;
1836 u64 rates, basic_rates;
1837 u16 capab_info, status_code, aid;
1838 struct ieee802_11_elems elems;
1839 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
1840 u8 *pos;
1841 int i, j;
1842 DECLARE_MAC_BUF(mac);
1843 bool have_higher_than_11mbit = false;
1844
1845 /* AssocResp and ReassocResp have identical structure, so process both
1846 * of them in this function. */
1847
1848 if (ifsta->state != IEEE80211_ASSOCIATE) {
1849 printk(KERN_DEBUG "%s: association frame received from "
1850 "%s, but not in associate state - ignored\n",
1851 dev->name, print_mac(mac, mgmt->sa));
1852 return;
1853 }
1854
1855 if (len < 24 + 6) {
1856 printk(KERN_DEBUG "%s: too short (%zd) association frame "
1857 "received from %s - ignored\n",
1858 dev->name, len, print_mac(mac, mgmt->sa));
1859 return;
1860 }
1861
1862 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1863 printk(KERN_DEBUG "%s: association frame received from "
1864 "unknown AP (SA=%s BSSID=%s) - "
1865 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1866 print_mac(mac, mgmt->bssid));
1867 return;
1868 }
1869
1870 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1871 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1872 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
1873
1874 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
1875 "status=%d aid=%d)\n",
1876 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
1877 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
1878
1879 if (status_code != WLAN_STATUS_SUCCESS) {
1880 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1881 dev->name, status_code);
1882 /* if this was a reassociation, ensure we try a "full"
1883 * association next time. This works around some broken APs
1884 * which do not correctly reject reassociation requests. */
1885 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
1886 return;
1887 }
1888
1889 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1890 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1891 "set\n", dev->name, aid);
1892 aid &= ~(BIT(15) | BIT(14));
1893
1894 pos = mgmt->u.assoc_resp.variable;
1895 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1896
1897 if (!elems.supp_rates) {
1898 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1899 dev->name);
1900 return;
1901 }
1902
1903 printk(KERN_DEBUG "%s: associated\n", dev->name);
1904 ifsta->aid = aid;
1905 ifsta->ap_capab = capab_info;
1906
1907 kfree(ifsta->assocresp_ies);
1908 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
1909 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
1910 if (ifsta->assocresp_ies)
1911 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1912
1913 rcu_read_lock();
1914
1915 /* Add STA entry for the AP */
1916 sta = sta_info_get(local, ifsta->bssid);
1917 if (!sta) {
1918 struct ieee80211_sta_bss *bss;
1919 int err;
1920
1921 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1922 if (!sta) {
1923 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1924 " the AP\n", dev->name);
1925 rcu_read_unlock();
1926 return;
1927 }
1928 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
1929 local->hw.conf.channel->center_freq,
1930 ifsta->ssid, ifsta->ssid_len);
1931 if (bss) {
1932 sta->last_rssi = bss->rssi;
1933 sta->last_signal = bss->signal;
1934 sta->last_noise = bss->noise;
1935 ieee80211_rx_bss_put(dev, bss);
1936 }
1937
1938 err = sta_info_insert(sta);
1939 if (err) {
1940 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1941 " the AP (error %d)\n", dev->name, err);
1942 rcu_read_unlock();
1943 return;
1944 }
1945 }
1946
1947 /*
1948 * FIXME: Do we really need to update the sta_info's information here?
1949 * We already know about the AP (we found it in our list) so it
1950 * should already be filled with the right info, no?
1951 * As is stands, all this is racy because typically we assume
1952 * the information that is filled in here (except flags) doesn't
1953 * change while a STA structure is alive. As such, it should move
1954 * to between the sta_info_alloc() and sta_info_insert() above.
1955 */
1956
1957 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1958 WLAN_STA_AUTHORIZED;
1959
1960 rates = 0;
1961 basic_rates = 0;
1962 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1963
1964 for (i = 0; i < elems.supp_rates_len; i++) {
1965 int rate = (elems.supp_rates[i] & 0x7f) * 5;
1966
1967 if (rate > 110)
1968 have_higher_than_11mbit = true;
1969
1970 for (j = 0; j < sband->n_bitrates; j++) {
1971 if (sband->bitrates[j].bitrate == rate)
1972 rates |= BIT(j);
1973 if (elems.supp_rates[i] & 0x80)
1974 basic_rates |= BIT(j);
1975 }
1976 }
1977
1978 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1979 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
1980
1981 if (rate > 110)
1982 have_higher_than_11mbit = true;
1983
1984 for (j = 0; j < sband->n_bitrates; j++) {
1985 if (sband->bitrates[j].bitrate == rate)
1986 rates |= BIT(j);
1987 if (elems.ext_supp_rates[i] & 0x80)
1988 basic_rates |= BIT(j);
1989 }
1990 }
1991
1992 sta->supp_rates[local->hw.conf.channel->band] = rates;
1993 sdata->basic_rates = basic_rates;
1994
1995 /* cf. IEEE 802.11 9.2.12 */
1996 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1997 have_higher_than_11mbit)
1998 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1999 else
2000 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
2001
2002 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2003 local->ops->conf_ht) {
2004 struct ieee80211_ht_bss_info bss_info;
2005
2006 ieee80211_ht_cap_ie_to_ht_info(
2007 (struct ieee80211_ht_cap *)
2008 elems.ht_cap_elem, &sta->ht_info);
2009 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2010 (struct ieee80211_ht_addt_info *)
2011 elems.ht_info_elem, &bss_info);
2012 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
2013 }
2014
2015 rate_control_rate_init(sta, local);
2016
2017 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2018 sta->flags |= WLAN_STA_WME;
2019 rcu_read_unlock();
2020 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2021 elems.wmm_param_len);
2022 } else
2023 rcu_read_unlock();
2024
2025 /* set AID, ieee80211_set_associated() will tell the driver */
2026 bss_conf->aid = aid;
2027 ieee80211_set_associated(dev, ifsta, 1);
2028
2029 ieee80211_associated(dev, ifsta);
2030 }
2031
2032
2033 /* Caller must hold local->sta_bss_lock */
2034 static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2035 struct ieee80211_sta_bss *bss)
2036 {
2037 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2038 u8 hash_idx;
2039
2040 if (bss_mesh_cfg(bss))
2041 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2042 bss_mesh_id_len(bss));
2043 else
2044 hash_idx = STA_HASH(bss->bssid);
2045
2046 bss->hnext = local->sta_bss_hash[hash_idx];
2047 local->sta_bss_hash[hash_idx] = bss;
2048 }
2049
2050
2051 /* Caller must hold local->sta_bss_lock */
2052 static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2053 struct ieee80211_sta_bss *bss)
2054 {
2055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2056 struct ieee80211_sta_bss *b, *prev = NULL;
2057 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2058 while (b) {
2059 if (b == bss) {
2060 if (!prev)
2061 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2062 bss->hnext;
2063 else
2064 prev->hnext = bss->hnext;
2065 break;
2066 }
2067 prev = b;
2068 b = b->hnext;
2069 }
2070 }
2071
2072
2073 static struct ieee80211_sta_bss *
2074 ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
2075 u8 *ssid, u8 ssid_len)
2076 {
2077 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2078 struct ieee80211_sta_bss *bss;
2079
2080 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2081 if (!bss)
2082 return NULL;
2083 atomic_inc(&bss->users);
2084 atomic_inc(&bss->users);
2085 memcpy(bss->bssid, bssid, ETH_ALEN);
2086 bss->freq = freq;
2087 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2088 memcpy(bss->ssid, ssid, ssid_len);
2089 bss->ssid_len = ssid_len;
2090 }
2091
2092 spin_lock_bh(&local->sta_bss_lock);
2093 /* TODO: order by RSSI? */
2094 list_add_tail(&bss->list, &local->sta_bss_list);
2095 __ieee80211_rx_bss_hash_add(dev, bss);
2096 spin_unlock_bh(&local->sta_bss_lock);
2097 return bss;
2098 }
2099
2100 static struct ieee80211_sta_bss *
2101 ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
2102 u8 *ssid, u8 ssid_len)
2103 {
2104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2105 struct ieee80211_sta_bss *bss;
2106
2107 spin_lock_bh(&local->sta_bss_lock);
2108 bss = local->sta_bss_hash[STA_HASH(bssid)];
2109 while (bss) {
2110 if (!bss_mesh_cfg(bss) &&
2111 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
2112 bss->freq == freq &&
2113 bss->ssid_len == ssid_len &&
2114 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
2115 atomic_inc(&bss->users);
2116 break;
2117 }
2118 bss = bss->hnext;
2119 }
2120 spin_unlock_bh(&local->sta_bss_lock);
2121 return bss;
2122 }
2123
2124 #ifdef CONFIG_MAC80211_MESH
2125 static struct ieee80211_sta_bss *
2126 ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2127 u8 *mesh_cfg, int freq)
2128 {
2129 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2130 struct ieee80211_sta_bss *bss;
2131
2132 spin_lock_bh(&local->sta_bss_lock);
2133 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2134 while (bss) {
2135 if (bss_mesh_cfg(bss) &&
2136 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
2137 bss->freq == freq &&
2138 mesh_id_len == bss->mesh_id_len &&
2139 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2140 mesh_id_len))) {
2141 atomic_inc(&bss->users);
2142 break;
2143 }
2144 bss = bss->hnext;
2145 }
2146 spin_unlock_bh(&local->sta_bss_lock);
2147 return bss;
2148 }
2149
2150 static struct ieee80211_sta_bss *
2151 ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2152 u8 *mesh_cfg, int mesh_config_len, int freq)
2153 {
2154 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155 struct ieee80211_sta_bss *bss;
2156
2157 if (mesh_config_len != MESH_CFG_LEN)
2158 return NULL;
2159
2160 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2161 if (!bss)
2162 return NULL;
2163
2164 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2165 if (!bss->mesh_cfg) {
2166 kfree(bss);
2167 return NULL;
2168 }
2169
2170 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2171 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2172 if (!bss->mesh_id) {
2173 kfree(bss->mesh_cfg);
2174 kfree(bss);
2175 return NULL;
2176 }
2177 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2178 }
2179
2180 atomic_inc(&bss->users);
2181 atomic_inc(&bss->users);
2182 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2183 bss->mesh_id_len = mesh_id_len;
2184 bss->freq = freq;
2185 spin_lock_bh(&local->sta_bss_lock);
2186 /* TODO: order by RSSI? */
2187 list_add_tail(&bss->list, &local->sta_bss_list);
2188 __ieee80211_rx_bss_hash_add(dev, bss);
2189 spin_unlock_bh(&local->sta_bss_lock);
2190 return bss;
2191 }
2192 #endif
2193
2194 static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2195 {
2196 kfree(bss->wpa_ie);
2197 kfree(bss->rsn_ie);
2198 kfree(bss->wmm_ie);
2199 kfree(bss->ht_ie);
2200 kfree(bss_mesh_id(bss));
2201 kfree(bss_mesh_cfg(bss));
2202 kfree(bss);
2203 }
2204
2205
2206 static void ieee80211_rx_bss_put(struct net_device *dev,
2207 struct ieee80211_sta_bss *bss)
2208 {
2209 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2210 if (!atomic_dec_and_test(&bss->users))
2211 return;
2212
2213 spin_lock_bh(&local->sta_bss_lock);
2214 __ieee80211_rx_bss_hash_del(dev, bss);
2215 list_del(&bss->list);
2216 spin_unlock_bh(&local->sta_bss_lock);
2217 ieee80211_rx_bss_free(bss);
2218 }
2219
2220
2221 void ieee80211_rx_bss_list_init(struct net_device *dev)
2222 {
2223 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2224 spin_lock_init(&local->sta_bss_lock);
2225 INIT_LIST_HEAD(&local->sta_bss_list);
2226 }
2227
2228
2229 void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2230 {
2231 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2232 struct ieee80211_sta_bss *bss, *tmp;
2233
2234 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2235 ieee80211_rx_bss_put(dev, bss);
2236 }
2237
2238
2239 static int ieee80211_sta_join_ibss(struct net_device *dev,
2240 struct ieee80211_if_sta *ifsta,
2241 struct ieee80211_sta_bss *bss)
2242 {
2243 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2244 int res, rates, i, j;
2245 struct sk_buff *skb;
2246 struct ieee80211_mgmt *mgmt;
2247 struct ieee80211_tx_control control;
2248 struct rate_selection ratesel;
2249 u8 *pos;
2250 struct ieee80211_sub_if_data *sdata;
2251 struct ieee80211_supported_band *sband;
2252
2253 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2254
2255 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2256
2257 /* Remove possible STA entries from other IBSS networks. */
2258 sta_info_flush_delayed(sdata);
2259
2260 if (local->ops->reset_tsf) {
2261 /* Reset own TSF to allow time synchronization work. */
2262 local->ops->reset_tsf(local_to_hw(local));
2263 }
2264 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2265 res = ieee80211_if_config(dev);
2266 if (res)
2267 return res;
2268
2269 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2270
2271 sdata->drop_unencrypted = bss->capability &
2272 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2273
2274 res = ieee80211_set_freq(local, bss->freq);
2275
2276 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2277 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2278 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2279 return -1;
2280 }
2281
2282 /* Set beacon template */
2283 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2284 do {
2285 if (!skb)
2286 break;
2287
2288 skb_reserve(skb, local->hw.extra_tx_headroom);
2289
2290 mgmt = (struct ieee80211_mgmt *)
2291 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2292 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2293 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2294 IEEE80211_STYPE_BEACON);
2295 memset(mgmt->da, 0xff, ETH_ALEN);
2296 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2297 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2298 mgmt->u.beacon.beacon_int =
2299 cpu_to_le16(local->hw.conf.beacon_int);
2300 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2301
2302 pos = skb_put(skb, 2 + ifsta->ssid_len);
2303 *pos++ = WLAN_EID_SSID;
2304 *pos++ = ifsta->ssid_len;
2305 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2306
2307 rates = bss->supp_rates_len;
2308 if (rates > 8)
2309 rates = 8;
2310 pos = skb_put(skb, 2 + rates);
2311 *pos++ = WLAN_EID_SUPP_RATES;
2312 *pos++ = rates;
2313 memcpy(pos, bss->supp_rates, rates);
2314
2315 if (bss->band == IEEE80211_BAND_2GHZ) {
2316 pos = skb_put(skb, 2 + 1);
2317 *pos++ = WLAN_EID_DS_PARAMS;
2318 *pos++ = 1;
2319 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2320 }
2321
2322 pos = skb_put(skb, 2 + 2);
2323 *pos++ = WLAN_EID_IBSS_PARAMS;
2324 *pos++ = 2;
2325 /* FIX: set ATIM window based on scan results */
2326 *pos++ = 0;
2327 *pos++ = 0;
2328
2329 if (bss->supp_rates_len > 8) {
2330 rates = bss->supp_rates_len - 8;
2331 pos = skb_put(skb, 2 + rates);
2332 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2333 *pos++ = rates;
2334 memcpy(pos, &bss->supp_rates[8], rates);
2335 }
2336
2337 memset(&control, 0, sizeof(control));
2338 rate_control_get_rate(dev, sband, skb, &ratesel);
2339 if (!ratesel.rate) {
2340 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2341 "for IBSS beacon\n", dev->name);
2342 break;
2343 }
2344 control.vif = &sdata->vif;
2345 control.tx_rate = ratesel.rate;
2346 if (sdata->bss_conf.use_short_preamble &&
2347 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2348 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2349 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2350 control.flags |= IEEE80211_TXCTL_NO_ACK;
2351 control.retry_limit = 1;
2352
2353 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2354 if (ifsta->probe_resp) {
2355 mgmt = (struct ieee80211_mgmt *)
2356 ifsta->probe_resp->data;
2357 mgmt->frame_control =
2358 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2359 IEEE80211_STYPE_PROBE_RESP);
2360 } else {
2361 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2362 "template for IBSS\n", dev->name);
2363 }
2364
2365 if (local->ops->beacon_update &&
2366 local->ops->beacon_update(local_to_hw(local),
2367 skb, &control) == 0) {
2368 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2369 "template\n", dev->name);
2370 skb = NULL;
2371 }
2372
2373 rates = 0;
2374 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2375 for (i = 0; i < bss->supp_rates_len; i++) {
2376 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2377 for (j = 0; j < sband->n_bitrates; j++)
2378 if (sband->bitrates[j].bitrate == bitrate)
2379 rates |= BIT(j);
2380 }
2381 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2382
2383 ieee80211_sta_def_wmm_params(dev, bss, 1);
2384 } while (0);
2385
2386 if (skb) {
2387 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2388 "template\n", dev->name);
2389 dev_kfree_skb(skb);
2390 }
2391
2392 ifsta->state = IEEE80211_IBSS_JOINED;
2393 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2394
2395 ieee80211_rx_bss_put(dev, bss);
2396
2397 return res;
2398 }
2399
2400 u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2401 struct ieee802_11_elems *elems,
2402 enum ieee80211_band band)
2403 {
2404 struct ieee80211_supported_band *sband;
2405 struct ieee80211_rate *bitrates;
2406 size_t num_rates;
2407 u64 supp_rates;
2408 int i, j;
2409 sband = local->hw.wiphy->bands[band];
2410
2411 if (!sband) {
2412 WARN_ON(1);
2413 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2414 }
2415
2416 bitrates = sband->bitrates;
2417 num_rates = sband->n_bitrates;
2418 supp_rates = 0;
2419 for (i = 0; i < elems->supp_rates_len +
2420 elems->ext_supp_rates_len; i++) {
2421 u8 rate = 0;
2422 int own_rate;
2423 if (i < elems->supp_rates_len)
2424 rate = elems->supp_rates[i];
2425 else if (elems->ext_supp_rates)
2426 rate = elems->ext_supp_rates
2427 [i - elems->supp_rates_len];
2428 own_rate = 5 * (rate & 0x7f);
2429 for (j = 0; j < num_rates; j++)
2430 if (bitrates[j].bitrate == own_rate)
2431 supp_rates |= BIT(j);
2432 }
2433 return supp_rates;
2434 }
2435
2436
2437 static void ieee80211_rx_bss_info(struct net_device *dev,
2438 struct ieee80211_mgmt *mgmt,
2439 size_t len,
2440 struct ieee80211_rx_status *rx_status,
2441 int beacon)
2442 {
2443 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2444 struct ieee802_11_elems elems;
2445 size_t baselen;
2446 int freq, clen;
2447 struct ieee80211_sta_bss *bss;
2448 struct sta_info *sta;
2449 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2450 u64 beacon_timestamp, rx_timestamp;
2451 struct ieee80211_channel *channel;
2452 DECLARE_MAC_BUF(mac);
2453 DECLARE_MAC_BUF(mac2);
2454
2455 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2456 return; /* ignore ProbeResp to foreign address */
2457
2458 #if 0
2459 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
2460 dev->name, beacon ? "Beacon" : "Probe Response",
2461 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
2462 #endif
2463
2464 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2465 if (baselen > len)
2466 return;
2467
2468 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2469 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2470
2471 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2472 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2473 u64 rates = ieee80211_sta_get_rates(local, &elems,
2474 rx_status->band);
2475
2476 mesh_neighbour_update(mgmt->sa, rates, dev,
2477 mesh_peer_accepts_plinks(&elems, dev));
2478 }
2479
2480 rcu_read_lock();
2481
2482 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
2483 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2484 (sta = sta_info_get(local, mgmt->sa))) {
2485 u64 prev_rates;
2486 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2487 rx_status->band);
2488
2489 prev_rates = sta->supp_rates[rx_status->band];
2490 sta->supp_rates[rx_status->band] &= supp_rates;
2491 if (sta->supp_rates[rx_status->band] == 0) {
2492 /* No matching rates - this should not really happen.
2493 * Make sure that at least one rate is marked
2494 * supported to avoid issues with TX rate ctrl. */
2495 sta->supp_rates[rx_status->band] =
2496 sdata->u.sta.supp_rates_bits[rx_status->band];
2497 }
2498 if (sta->supp_rates[rx_status->band] != prev_rates) {
2499 printk(KERN_DEBUG "%s: updated supp_rates set for "
2500 "%s based on beacon info (0x%llx & 0x%llx -> "
2501 "0x%llx)\n",
2502 dev->name, print_mac(mac, sta->addr),
2503 (unsigned long long) prev_rates,
2504 (unsigned long long) supp_rates,
2505 (unsigned long long) sta->supp_rates[rx_status->band]);
2506 }
2507 }
2508
2509 rcu_read_unlock();
2510
2511 if (elems.ds_params && elems.ds_params_len == 1)
2512 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
2513 else
2514 freq = rx_status->freq;
2515
2516 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2517
2518 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2519 return;
2520
2521 #ifdef CONFIG_MAC80211_MESH
2522 if (elems.mesh_config)
2523 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2524 elems.mesh_id_len, elems.mesh_config, freq);
2525 else
2526 #endif
2527 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
2528 elems.ssid, elems.ssid_len);
2529 if (!bss) {
2530 #ifdef CONFIG_MAC80211_MESH
2531 if (elems.mesh_config)
2532 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2533 elems.mesh_id_len, elems.mesh_config,
2534 elems.mesh_config_len, freq);
2535 else
2536 #endif
2537 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2538 elems.ssid, elems.ssid_len);
2539 if (!bss)
2540 return;
2541 } else {
2542 #if 0
2543 /* TODO: order by RSSI? */
2544 spin_lock_bh(&local->sta_bss_lock);
2545 list_move_tail(&bss->list, &local->sta_bss_list);
2546 spin_unlock_bh(&local->sta_bss_lock);
2547 #endif
2548 }
2549
2550 bss->band = rx_status->band;
2551
2552 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2553 bss->probe_resp && beacon) {
2554 /* STA mode:
2555 * Do not allow beacon to override data from Probe Response. */
2556 ieee80211_rx_bss_put(dev, bss);
2557 return;
2558 }
2559
2560 /* save the ERP value so that it is available at association time */
2561 if (elems.erp_info && elems.erp_info_len >= 1) {
2562 bss->erp_value = elems.erp_info[0];
2563 bss->has_erp_value = 1;
2564 }
2565
2566 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2567 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
2568
2569 bss->supp_rates_len = 0;
2570 if (elems.supp_rates) {
2571 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2572 if (clen > elems.supp_rates_len)
2573 clen = elems.supp_rates_len;
2574 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2575 clen);
2576 bss->supp_rates_len += clen;
2577 }
2578 if (elems.ext_supp_rates) {
2579 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2580 if (clen > elems.ext_supp_rates_len)
2581 clen = elems.ext_supp_rates_len;
2582 memcpy(&bss->supp_rates[bss->supp_rates_len],
2583 elems.ext_supp_rates, clen);
2584 bss->supp_rates_len += clen;
2585 }
2586
2587 if (elems.wpa &&
2588 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2589 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2590 kfree(bss->wpa_ie);
2591 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2592 if (bss->wpa_ie) {
2593 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2594 bss->wpa_ie_len = elems.wpa_len + 2;
2595 } else
2596 bss->wpa_ie_len = 0;
2597 } else if (!elems.wpa && bss->wpa_ie) {
2598 kfree(bss->wpa_ie);
2599 bss->wpa_ie = NULL;
2600 bss->wpa_ie_len = 0;
2601 }
2602
2603 if (elems.rsn &&
2604 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2605 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2606 kfree(bss->rsn_ie);
2607 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2608 if (bss->rsn_ie) {
2609 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2610 bss->rsn_ie_len = elems.rsn_len + 2;
2611 } else
2612 bss->rsn_ie_len = 0;
2613 } else if (!elems.rsn && bss->rsn_ie) {
2614 kfree(bss->rsn_ie);
2615 bss->rsn_ie = NULL;
2616 bss->rsn_ie_len = 0;
2617 }
2618
2619 if (elems.wmm_param &&
2620 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2621 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2622 kfree(bss->wmm_ie);
2623 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2624 if (bss->wmm_ie) {
2625 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2626 elems.wmm_param_len + 2);
2627 bss->wmm_ie_len = elems.wmm_param_len + 2;
2628 } else
2629 bss->wmm_ie_len = 0;
2630 } else if (!elems.wmm_param && bss->wmm_ie) {
2631 kfree(bss->wmm_ie);
2632 bss->wmm_ie = NULL;
2633 bss->wmm_ie_len = 0;
2634 }
2635 if (elems.ht_cap_elem &&
2636 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2637 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2638 kfree(bss->ht_ie);
2639 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2640 if (bss->ht_ie) {
2641 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2642 elems.ht_cap_elem_len + 2);
2643 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2644 } else
2645 bss->ht_ie_len = 0;
2646 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2647 kfree(bss->ht_ie);
2648 bss->ht_ie = NULL;
2649 bss->ht_ie_len = 0;
2650 }
2651
2652 bss->timestamp = beacon_timestamp;
2653 bss->last_update = jiffies;
2654 bss->rssi = rx_status->ssi;
2655 bss->signal = rx_status->signal;
2656 bss->noise = rx_status->noise;
2657 if (!beacon)
2658 bss->probe_resp++;
2659
2660 /* check if we need to merge IBSS */
2661 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2662 !local->sta_sw_scanning && !local->sta_hw_scanning &&
2663 bss->capability & WLAN_CAPABILITY_IBSS &&
2664 bss->freq == local->oper_channel->center_freq &&
2665 elems.ssid_len == sdata->u.sta.ssid_len &&
2666 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2667 if (rx_status->flag & RX_FLAG_TSFT) {
2668 /* in order for correct IBSS merging we need mactime
2669 *
2670 * since mactime is defined as the time the first data
2671 * symbol of the frame hits the PHY, and the timestamp
2672 * of the beacon is defined as "the time that the data
2673 * symbol containing the first bit of the timestamp is
2674 * transmitted to the PHY plus the transmitting STA’s
2675 * delays through its local PHY from the MAC-PHY
2676 * interface to its interface with the WM"
2677 * (802.11 11.1.2) - equals the time this bit arrives at
2678 * the receiver - we have to take into account the
2679 * offset between the two.
2680 * e.g: at 1 MBit that means mactime is 192 usec earlier
2681 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2682 */
2683 int rate = local->hw.wiphy->bands[rx_status->band]->
2684 bitrates[rx_status->rate_idx].bitrate;
2685 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2686 } else if (local && local->ops && local->ops->get_tsf)
2687 /* second best option: get current TSF */
2688 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2689 else
2690 /* can't merge without knowing the TSF */
2691 rx_timestamp = -1LLU;
2692 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2693 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2694 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2695 print_mac(mac, mgmt->sa),
2696 print_mac(mac2, mgmt->bssid),
2697 (unsigned long long)rx_timestamp,
2698 (unsigned long long)beacon_timestamp,
2699 (unsigned long long)(rx_timestamp - beacon_timestamp),
2700 jiffies);
2701 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2702 if (beacon_timestamp > rx_timestamp) {
2703 #ifndef CONFIG_MAC80211_IBSS_DEBUG
2704 if (net_ratelimit())
2705 #endif
2706 printk(KERN_DEBUG "%s: beacon TSF higher than "
2707 "local TSF - IBSS merge with BSSID %s\n",
2708 dev->name, print_mac(mac, mgmt->bssid));
2709 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2710 ieee80211_ibss_add_sta(dev, NULL,
2711 mgmt->bssid, mgmt->sa);
2712 }
2713 }
2714
2715 ieee80211_rx_bss_put(dev, bss);
2716 }
2717
2718
2719 static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2720 struct ieee80211_mgmt *mgmt,
2721 size_t len,
2722 struct ieee80211_rx_status *rx_status)
2723 {
2724 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2725 }
2726
2727
2728 static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2729 struct ieee80211_mgmt *mgmt,
2730 size_t len,
2731 struct ieee80211_rx_status *rx_status)
2732 {
2733 struct ieee80211_sub_if_data *sdata;
2734 struct ieee80211_if_sta *ifsta;
2735 size_t baselen;
2736 struct ieee802_11_elems elems;
2737 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2738 struct ieee80211_conf *conf = &local->hw.conf;
2739 u32 changed = 0;
2740
2741 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2742
2743 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2744 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
2745 return;
2746 ifsta = &sdata->u.sta;
2747
2748 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
2749 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2750 return;
2751
2752 /* Process beacon from the current BSS */
2753 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2754 if (baselen > len)
2755 return;
2756
2757 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2758
2759 if (elems.erp_info && elems.erp_info_len >= 1)
2760 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
2761
2762 if (elems.ht_cap_elem && elems.ht_info_elem &&
2763 elems.wmm_param && local->ops->conf_ht &&
2764 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2765 struct ieee80211_ht_bss_info bss_info;
2766
2767 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2768 (struct ieee80211_ht_addt_info *)
2769 elems.ht_info_elem, &bss_info);
2770 /* check if AP changed bss inforamation */
2771 if ((conf->ht_bss_conf.primary_channel !=
2772 bss_info.primary_channel) ||
2773 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2774 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2775 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2776 &bss_info);
2777 }
2778
2779 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2780 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2781 elems.wmm_param_len);
2782 }
2783
2784 ieee80211_bss_info_change_notify(sdata, changed);
2785 }
2786
2787
2788 static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2789 struct ieee80211_if_sta *ifsta,
2790 struct ieee80211_mgmt *mgmt,
2791 size_t len,
2792 struct ieee80211_rx_status *rx_status)
2793 {
2794 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2795 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2796 int tx_last_beacon;
2797 struct sk_buff *skb;
2798 struct ieee80211_mgmt *resp;
2799 u8 *pos, *end;
2800 DECLARE_MAC_BUF(mac);
2801 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2802 DECLARE_MAC_BUF(mac2);
2803 DECLARE_MAC_BUF(mac3);
2804 #endif
2805
2806 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
2807 ifsta->state != IEEE80211_IBSS_JOINED ||
2808 len < 24 + 2 || !ifsta->probe_resp)
2809 return;
2810
2811 if (local->ops->tx_last_beacon)
2812 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2813 else
2814 tx_last_beacon = 1;
2815
2816 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2817 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2818 "%s (tx_last_beacon=%d)\n",
2819 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2820 print_mac(mac3, mgmt->bssid), tx_last_beacon);
2821 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2822
2823 if (!tx_last_beacon)
2824 return;
2825
2826 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2827 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2828 return;
2829
2830 end = ((u8 *) mgmt) + len;
2831 pos = mgmt->u.probe_req.variable;
2832 if (pos[0] != WLAN_EID_SSID ||
2833 pos + 2 + pos[1] > end) {
2834 if (net_ratelimit()) {
2835 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2836 "from %s\n",
2837 dev->name, print_mac(mac, mgmt->sa));
2838 }
2839 return;
2840 }
2841 if (pos[1] != 0 &&
2842 (pos[1] != ifsta->ssid_len ||
2843 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2844 /* Ignore ProbeReq for foreign SSID */
2845 return;
2846 }
2847
2848 /* Reply with ProbeResp */
2849 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
2850 if (!skb)
2851 return;
2852
2853 resp = (struct ieee80211_mgmt *) skb->data;
2854 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2855 #ifdef CONFIG_MAC80211_IBSS_DEBUG
2856 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2857 dev->name, print_mac(mac, resp->da));
2858 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
2859 ieee80211_sta_tx(dev, skb, 0);
2860 }
2861
2862 static void ieee80211_rx_mgmt_action(struct net_device *dev,
2863 struct ieee80211_if_sta *ifsta,
2864 struct ieee80211_mgmt *mgmt,
2865 size_t len,
2866 struct ieee80211_rx_status *rx_status)
2867 {
2868 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2869
2870 if (len < IEEE80211_MIN_ACTION_SIZE)
2871 return;
2872
2873 switch (mgmt->u.action.category) {
2874 case WLAN_CATEGORY_BACK:
2875 switch (mgmt->u.action.u.addba_req.action_code) {
2876 case WLAN_ACTION_ADDBA_REQ:
2877 if (len < (IEEE80211_MIN_ACTION_SIZE +
2878 sizeof(mgmt->u.action.u.addba_req)))
2879 break;
2880 ieee80211_sta_process_addba_request(dev, mgmt, len);
2881 break;
2882 case WLAN_ACTION_ADDBA_RESP:
2883 if (len < (IEEE80211_MIN_ACTION_SIZE +
2884 sizeof(mgmt->u.action.u.addba_resp)))
2885 break;
2886 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2887 break;
2888 case WLAN_ACTION_DELBA:
2889 if (len < (IEEE80211_MIN_ACTION_SIZE +
2890 sizeof(mgmt->u.action.u.delba)))
2891 break;
2892 ieee80211_sta_process_delba(dev, mgmt, len);
2893 break;
2894 default:
2895 if (net_ratelimit())
2896 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
2897 dev->name);
2898 break;
2899 }
2900 break;
2901 case PLINK_CATEGORY:
2902 if (ieee80211_vif_is_mesh(&sdata->vif))
2903 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2904 break;
2905 case MESH_PATH_SEL_CATEGORY:
2906 if (ieee80211_vif_is_mesh(&sdata->vif))
2907 mesh_rx_path_sel_frame(dev, mgmt, len);
2908 break;
2909 default:
2910 if (net_ratelimit())
2911 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2912 "category=%d\n", dev->name, mgmt->u.action.category);
2913 break;
2914 }
2915 }
2916
2917 void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2918 struct ieee80211_rx_status *rx_status)
2919 {
2920 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2921 struct ieee80211_sub_if_data *sdata;
2922 struct ieee80211_if_sta *ifsta;
2923 struct ieee80211_mgmt *mgmt;
2924 u16 fc;
2925
2926 if (skb->len < 24)
2927 goto fail;
2928
2929 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2930 ifsta = &sdata->u.sta;
2931
2932 mgmt = (struct ieee80211_mgmt *) skb->data;
2933 fc = le16_to_cpu(mgmt->frame_control);
2934
2935 switch (fc & IEEE80211_FCTL_STYPE) {
2936 case IEEE80211_STYPE_PROBE_REQ:
2937 case IEEE80211_STYPE_PROBE_RESP:
2938 case IEEE80211_STYPE_BEACON:
2939 case IEEE80211_STYPE_ACTION:
2940 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2941 case IEEE80211_STYPE_AUTH:
2942 case IEEE80211_STYPE_ASSOC_RESP:
2943 case IEEE80211_STYPE_REASSOC_RESP:
2944 case IEEE80211_STYPE_DEAUTH:
2945 case IEEE80211_STYPE_DISASSOC:
2946 skb_queue_tail(&ifsta->skb_queue, skb);
2947 queue_work(local->hw.workqueue, &ifsta->work);
2948 return;
2949 default:
2950 printk(KERN_DEBUG "%s: received unknown management frame - "
2951 "stype=%d\n", dev->name,
2952 (fc & IEEE80211_FCTL_STYPE) >> 4);
2953 break;
2954 }
2955
2956 fail:
2957 kfree_skb(skb);
2958 }
2959
2960
2961 static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2962 struct sk_buff *skb)
2963 {
2964 struct ieee80211_rx_status *rx_status;
2965 struct ieee80211_sub_if_data *sdata;
2966 struct ieee80211_if_sta *ifsta;
2967 struct ieee80211_mgmt *mgmt;
2968 u16 fc;
2969
2970 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2971 ifsta = &sdata->u.sta;
2972
2973 rx_status = (struct ieee80211_rx_status *) skb->cb;
2974 mgmt = (struct ieee80211_mgmt *) skb->data;
2975 fc = le16_to_cpu(mgmt->frame_control);
2976
2977 switch (fc & IEEE80211_FCTL_STYPE) {
2978 case IEEE80211_STYPE_PROBE_REQ:
2979 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2980 rx_status);
2981 break;
2982 case IEEE80211_STYPE_PROBE_RESP:
2983 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2984 break;
2985 case IEEE80211_STYPE_BEACON:
2986 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2987 break;
2988 case IEEE80211_STYPE_AUTH:
2989 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2990 break;
2991 case IEEE80211_STYPE_ASSOC_RESP:
2992 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
2993 break;
2994 case IEEE80211_STYPE_REASSOC_RESP:
2995 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
2996 break;
2997 case IEEE80211_STYPE_DEAUTH:
2998 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2999 break;
3000 case IEEE80211_STYPE_DISASSOC:
3001 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3002 break;
3003 case IEEE80211_STYPE_ACTION:
3004 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
3005 break;
3006 }
3007
3008 kfree_skb(skb);
3009 }
3010
3011
3012 ieee80211_rx_result
3013 ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3014 struct ieee80211_rx_status *rx_status)
3015 {
3016 struct ieee80211_mgmt *mgmt;
3017 u16 fc;
3018
3019 if (skb->len < 2)
3020 return RX_DROP_UNUSABLE;
3021
3022 mgmt = (struct ieee80211_mgmt *) skb->data;
3023 fc = le16_to_cpu(mgmt->frame_control);
3024
3025 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
3026 return RX_CONTINUE;
3027
3028 if (skb->len < 24)
3029 return RX_DROP_MONITOR;
3030
3031 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3032 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3033 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3034 skb->len, rx_status);
3035 dev_kfree_skb(skb);
3036 return RX_QUEUED;
3037 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3038 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3039 rx_status);
3040 dev_kfree_skb(skb);
3041 return RX_QUEUED;
3042 }
3043 }
3044 return RX_CONTINUE;
3045 }
3046
3047
3048 static int ieee80211_sta_active_ibss(struct net_device *dev)
3049 {
3050 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3051 int active = 0;
3052 struct sta_info *sta;
3053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3054
3055 rcu_read_lock();
3056
3057 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3058 if (sta->sdata == sdata &&
3059 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3060 jiffies)) {
3061 active++;
3062 break;
3063 }
3064 }
3065
3066 rcu_read_unlock();
3067
3068 return active;
3069 }
3070
3071
3072 static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
3073 {
3074 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3075 struct sta_info *sta, *tmp;
3076 LIST_HEAD(tmp_list);
3077 DECLARE_MAC_BUF(mac);
3078 unsigned long flags;
3079
3080 spin_lock_irqsave(&local->sta_lock, flags);
3081 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
3082 if (time_after(jiffies, sta->last_rx + exp_time)) {
3083 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3084 dev->name, print_mac(mac, sta->addr));
3085 __sta_info_unlink(&sta);
3086 if (sta)
3087 list_add(&sta->list, &tmp_list);
3088 }
3089 spin_unlock_irqrestore(&local->sta_lock, flags);
3090
3091 synchronize_rcu();
3092
3093 rtnl_lock();
3094 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3095 sta_info_destroy(sta);
3096 rtnl_unlock();
3097 }
3098
3099
3100 static void ieee80211_sta_merge_ibss(struct net_device *dev,
3101 struct ieee80211_if_sta *ifsta)
3102 {
3103 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3104
3105 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
3106 if (ieee80211_sta_active_ibss(dev))
3107 return;
3108
3109 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3110 "IBSS networks with same SSID (merge)\n", dev->name);
3111 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3112 }
3113
3114
3115 #ifdef CONFIG_MAC80211_MESH
3116 static void ieee80211_mesh_housekeeping(struct net_device *dev,
3117 struct ieee80211_if_sta *ifsta)
3118 {
3119 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3120 bool free_plinks;
3121
3122 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3123 mesh_path_expire(dev);
3124
3125 free_plinks = mesh_plink_availables(sdata);
3126 if (free_plinks != sdata->u.sta.accepting_plinks)
3127 ieee80211_if_config_beacon(dev);
3128
3129 mod_timer(&ifsta->timer, jiffies +
3130 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3131 }
3132
3133
3134 void ieee80211_start_mesh(struct net_device *dev)
3135 {
3136 struct ieee80211_if_sta *ifsta;
3137 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3138 ifsta = &sdata->u.sta;
3139 ifsta->state = IEEE80211_MESH_UP;
3140 ieee80211_sta_timer((unsigned long)sdata);
3141 }
3142 #endif
3143
3144
3145 void ieee80211_sta_timer(unsigned long data)
3146 {
3147 struct ieee80211_sub_if_data *sdata =
3148 (struct ieee80211_sub_if_data *) data;
3149 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3150 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3151
3152 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3153 queue_work(local->hw.workqueue, &ifsta->work);
3154 }
3155
3156 void ieee80211_sta_work(struct work_struct *work)
3157 {
3158 struct ieee80211_sub_if_data *sdata =
3159 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3160 struct net_device *dev = sdata->dev;
3161 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3162 struct ieee80211_if_sta *ifsta;
3163 struct sk_buff *skb;
3164
3165 if (!netif_running(dev))
3166 return;
3167
3168 if (local->sta_sw_scanning || local->sta_hw_scanning)
3169 return;
3170
3171 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3172 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3173 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
3174 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
3175 "(type=%d)\n", dev->name, sdata->vif.type);
3176 return;
3177 }
3178 ifsta = &sdata->u.sta;
3179
3180 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3181 ieee80211_sta_rx_queued_mgmt(dev, skb);
3182
3183 #ifdef CONFIG_MAC80211_MESH
3184 if (ifsta->preq_queue_len &&
3185 time_after(jiffies,
3186 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3187 mesh_path_start_discovery(dev);
3188 #endif
3189
3190 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3191 ifsta->state != IEEE80211_ASSOCIATE &&
3192 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3193 if (ifsta->scan_ssid_len)
3194 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3195 else
3196 ieee80211_sta_start_scan(dev, NULL, 0);
3197 return;
3198 }
3199
3200 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3201 if (ieee80211_sta_config_auth(dev, ifsta))
3202 return;
3203 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3204 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3205 return;
3206
3207 switch (ifsta->state) {
3208 case IEEE80211_DISABLED:
3209 break;
3210 case IEEE80211_AUTHENTICATE:
3211 ieee80211_authenticate(dev, ifsta);
3212 break;
3213 case IEEE80211_ASSOCIATE:
3214 ieee80211_associate(dev, ifsta);
3215 break;
3216 case IEEE80211_ASSOCIATED:
3217 ieee80211_associated(dev, ifsta);
3218 break;
3219 case IEEE80211_IBSS_SEARCH:
3220 ieee80211_sta_find_ibss(dev, ifsta);
3221 break;
3222 case IEEE80211_IBSS_JOINED:
3223 ieee80211_sta_merge_ibss(dev, ifsta);
3224 break;
3225 #ifdef CONFIG_MAC80211_MESH
3226 case IEEE80211_MESH_UP:
3227 ieee80211_mesh_housekeeping(dev, ifsta);
3228 break;
3229 #endif
3230 default:
3231 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3232 ifsta->state);
3233 break;
3234 }
3235
3236 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3237 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3238 "mixed-cell disabled - disassociate\n", dev->name);
3239
3240 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3241 ieee80211_set_disassoc(dev, ifsta, 0);
3242 }
3243 }
3244
3245
3246 static void ieee80211_sta_reset_auth(struct net_device *dev,
3247 struct ieee80211_if_sta *ifsta)
3248 {
3249 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3250
3251 if (local->ops->reset_tsf) {
3252 /* Reset own TSF to allow time synchronization work. */
3253 local->ops->reset_tsf(local_to_hw(local));
3254 }
3255
3256 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3257
3258
3259 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3260 ifsta->auth_alg = WLAN_AUTH_OPEN;
3261 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3262 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3263 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3264 ifsta->auth_alg = WLAN_AUTH_LEAP;
3265 else
3266 ifsta->auth_alg = WLAN_AUTH_OPEN;
3267 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3268 ifsta->auth_alg);
3269 ifsta->auth_transaction = -1;
3270 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3271 ifsta->auth_tries = ifsta->assoc_tries = 0;
3272 netif_carrier_off(dev);
3273 }
3274
3275
3276 void ieee80211_sta_req_auth(struct net_device *dev,
3277 struct ieee80211_if_sta *ifsta)
3278 {
3279 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3280 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3281
3282 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3283 return;
3284
3285 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3286 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3287 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3288 IEEE80211_STA_AUTO_SSID_SEL))) {
3289 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3290 queue_work(local->hw.workqueue, &ifsta->work);
3291 }
3292 }
3293
3294 static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3295 const char *ssid, int ssid_len)
3296 {
3297 int tmp, hidden_ssid;
3298
3299 if (ssid_len == ifsta->ssid_len &&
3300 !memcmp(ifsta->ssid, ssid, ssid_len))
3301 return 1;
3302
3303 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
3304 return 0;
3305
3306 hidden_ssid = 1;
3307 tmp = ssid_len;
3308 while (tmp--) {
3309 if (ssid[tmp] != '\0') {
3310 hidden_ssid = 0;
3311 break;
3312 }
3313 }
3314
3315 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3316 return 1;
3317
3318 if (ssid_len == 1 && ssid[0] == ' ')
3319 return 1;
3320
3321 return 0;
3322 }
3323
3324 static int ieee80211_sta_config_auth(struct net_device *dev,
3325 struct ieee80211_if_sta *ifsta)
3326 {
3327 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3328 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3329 struct ieee80211_sta_bss *bss, *selected = NULL;
3330 int top_rssi = 0, freq;
3331
3332 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3333 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
3334 ifsta->state = IEEE80211_AUTHENTICATE;
3335 ieee80211_sta_reset_auth(dev, ifsta);
3336 return 0;
3337 }
3338
3339 spin_lock_bh(&local->sta_bss_lock);
3340 freq = local->oper_channel->center_freq;
3341 list_for_each_entry(bss, &local->sta_bss_list, list) {
3342 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3343 continue;
3344
3345 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3346 !!sdata->default_key)
3347 continue;
3348
3349 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3350 bss->freq != freq)
3351 continue;
3352
3353 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3354 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3355 continue;
3356
3357 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3358 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3359 continue;
3360
3361 if (!selected || top_rssi < bss->rssi) {
3362 selected = bss;
3363 top_rssi = bss->rssi;
3364 }
3365 }
3366 if (selected)
3367 atomic_inc(&selected->users);
3368 spin_unlock_bh(&local->sta_bss_lock);
3369
3370 if (selected) {
3371 ieee80211_set_freq(local, selected->freq);
3372 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3373 ieee80211_sta_set_ssid(dev, selected->ssid,
3374 selected->ssid_len);
3375 ieee80211_sta_set_bssid(dev, selected->bssid);
3376 ieee80211_sta_def_wmm_params(dev, selected, 0);
3377 ieee80211_rx_bss_put(dev, selected);
3378 ifsta->state = IEEE80211_AUTHENTICATE;
3379 ieee80211_sta_reset_auth(dev, ifsta);
3380 return 0;
3381 } else {
3382 if (ifsta->state != IEEE80211_AUTHENTICATE) {
3383 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3384 ieee80211_sta_start_scan(dev, NULL, 0);
3385 else
3386 ieee80211_sta_start_scan(dev, ifsta->ssid,
3387 ifsta->ssid_len);
3388 ifsta->state = IEEE80211_AUTHENTICATE;
3389 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3390 } else
3391 ifsta->state = IEEE80211_DISABLED;
3392 }
3393 return -1;
3394 }
3395
3396
3397 static int ieee80211_sta_create_ibss(struct net_device *dev,
3398 struct ieee80211_if_sta *ifsta)
3399 {
3400 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3401 struct ieee80211_sta_bss *bss;
3402 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3403 struct ieee80211_supported_band *sband;
3404 u8 bssid[ETH_ALEN], *pos;
3405 int i;
3406 DECLARE_MAC_BUF(mac);
3407
3408 #if 0
3409 /* Easier testing, use fixed BSSID. */
3410 memset(bssid, 0xfe, ETH_ALEN);
3411 #else
3412 /* Generate random, not broadcast, locally administered BSSID. Mix in
3413 * own MAC address to make sure that devices that do not have proper
3414 * random number generator get different BSSID. */
3415 get_random_bytes(bssid, ETH_ALEN);
3416 for (i = 0; i < ETH_ALEN; i++)
3417 bssid[i] ^= dev->dev_addr[i];
3418 bssid[0] &= ~0x01;
3419 bssid[0] |= 0x02;
3420 #endif
3421
3422 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3423 dev->name, print_mac(mac, bssid));
3424
3425 bss = ieee80211_rx_bss_add(dev, bssid,
3426 local->hw.conf.channel->center_freq,
3427 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
3428 if (!bss)
3429 return -ENOMEM;
3430
3431 bss->band = local->hw.conf.channel->band;
3432 sband = local->hw.wiphy->bands[bss->band];
3433
3434 if (local->hw.conf.beacon_int == 0)
3435 local->hw.conf.beacon_int = 10000;
3436 bss->beacon_int = local->hw.conf.beacon_int;
3437 bss->last_update = jiffies;
3438 bss->capability = WLAN_CAPABILITY_IBSS;
3439 if (sdata->default_key) {
3440 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3441 } else
3442 sdata->drop_unencrypted = 0;
3443 bss->supp_rates_len = sband->n_bitrates;
3444 pos = bss->supp_rates;
3445 for (i = 0; i < sband->n_bitrates; i++) {
3446 int rate = sband->bitrates[i].bitrate;
3447 *pos++ = (u8) (rate / 5);
3448 }
3449
3450 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3451 }
3452
3453
3454 static int ieee80211_sta_find_ibss(struct net_device *dev,
3455 struct ieee80211_if_sta *ifsta)
3456 {
3457 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3458 struct ieee80211_sta_bss *bss;
3459 int found = 0;
3460 u8 bssid[ETH_ALEN];
3461 int active_ibss;
3462 DECLARE_MAC_BUF(mac);
3463 DECLARE_MAC_BUF(mac2);
3464
3465 if (ifsta->ssid_len == 0)
3466 return -EINVAL;
3467
3468 active_ibss = ieee80211_sta_active_ibss(dev);
3469 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3470 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3471 dev->name, active_ibss);
3472 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3473 spin_lock_bh(&local->sta_bss_lock);
3474 list_for_each_entry(bss, &local->sta_bss_list, list) {
3475 if (ifsta->ssid_len != bss->ssid_len ||
3476 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3477 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3478 continue;
3479 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3480 printk(KERN_DEBUG " bssid=%s found\n",
3481 print_mac(mac, bss->bssid));
3482 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3483 memcpy(bssid, bss->bssid, ETH_ALEN);
3484 found = 1;
3485 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3486 break;
3487 }
3488 spin_unlock_bh(&local->sta_bss_lock);
3489
3490 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3491 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3492 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
3493 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3494 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
3495 (bss = ieee80211_rx_bss_get(dev, bssid,
3496 local->hw.conf.channel->center_freq,
3497 ifsta->ssid, ifsta->ssid_len))) {
3498 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
3499 " based on configured SSID\n",
3500 dev->name, print_mac(mac, bssid));
3501 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3502 }
3503 #ifdef CONFIG_MAC80211_IBSS_DEBUG
3504 printk(KERN_DEBUG " did not try to join ibss\n");
3505 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
3506
3507 /* Selected IBSS not found in current scan results - try to scan */
3508 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3509 !ieee80211_sta_active_ibss(dev)) {
3510 mod_timer(&ifsta->timer, jiffies +
3511 IEEE80211_IBSS_MERGE_INTERVAL);
3512 } else if (time_after(jiffies, local->last_scan_completed +
3513 IEEE80211_SCAN_INTERVAL)) {
3514 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3515 "join\n", dev->name);
3516 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3517 ifsta->ssid_len);
3518 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3519 int interval = IEEE80211_SCAN_INTERVAL;
3520
3521 if (time_after(jiffies, ifsta->ibss_join_req +
3522 IEEE80211_IBSS_JOIN_TIMEOUT)) {
3523 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
3524 (!(local->oper_channel->flags &
3525 IEEE80211_CHAN_NO_IBSS)))
3526 return ieee80211_sta_create_ibss(dev, ifsta);
3527 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
3528 printk(KERN_DEBUG "%s: IBSS not allowed on"
3529 " %d MHz\n", dev->name,
3530 local->hw.conf.channel->center_freq);
3531 }
3532
3533 /* No IBSS found - decrease scan interval and continue
3534 * scanning. */
3535 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3536 }
3537
3538 ifsta->state = IEEE80211_IBSS_SEARCH;
3539 mod_timer(&ifsta->timer, jiffies + interval);
3540 return 0;
3541 }
3542
3543 return 0;
3544 }
3545
3546
3547 int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3548 {
3549 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3550 struct ieee80211_if_sta *ifsta;
3551
3552 if (len > IEEE80211_MAX_SSID_LEN)
3553 return -EINVAL;
3554
3555 ifsta = &sdata->u.sta;
3556
3557 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
3558 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
3559 memcpy(ifsta->ssid, ssid, len);
3560 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3561 ifsta->ssid_len = len;
3562
3563 if (len)
3564 ifsta->flags |= IEEE80211_STA_SSID_SET;
3565 else
3566 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
3567 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3568 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
3569 ifsta->ibss_join_req = jiffies;
3570 ifsta->state = IEEE80211_IBSS_SEARCH;
3571 return ieee80211_sta_find_ibss(dev, ifsta);
3572 }
3573 return 0;
3574 }
3575
3576
3577 int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3578 {
3579 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3580 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3581 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3582 *len = ifsta->ssid_len;
3583 return 0;
3584 }
3585
3586
3587 int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3588 {
3589 struct ieee80211_sub_if_data *sdata;
3590 struct ieee80211_if_sta *ifsta;
3591 int res;
3592
3593 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3594 ifsta = &sdata->u.sta;
3595
3596 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3597 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3598 res = ieee80211_if_config(dev);
3599 if (res) {
3600 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3601 "the low-level driver\n", dev->name);
3602 return res;
3603 }
3604 }
3605
3606 if (is_valid_ether_addr(bssid))
3607 ifsta->flags |= IEEE80211_STA_BSSID_SET;
3608 else
3609 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3610
3611 return 0;
3612 }
3613
3614
3615 static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3616 struct ieee80211_sub_if_data *sdata,
3617 int powersave)
3618 {
3619 struct sk_buff *skb;
3620 struct ieee80211_hdr *nullfunc;
3621 u16 fc;
3622
3623 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3624 if (!skb) {
3625 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3626 "frame\n", sdata->dev->name);
3627 return;
3628 }
3629 skb_reserve(skb, local->hw.extra_tx_headroom);
3630
3631 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3632 memset(nullfunc, 0, 24);
3633 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3634 IEEE80211_FCTL_TODS;
3635 if (powersave)
3636 fc |= IEEE80211_FCTL_PM;
3637 nullfunc->frame_control = cpu_to_le16(fc);
3638 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3639 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3640 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3641
3642 ieee80211_sta_tx(sdata->dev, skb, 0);
3643 }
3644
3645
3646 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3647 {
3648 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3649 ieee80211_vif_is_mesh(&sdata->vif))
3650 ieee80211_sta_timer((unsigned long)sdata);
3651 }
3652
3653 void ieee80211_scan_completed(struct ieee80211_hw *hw)
3654 {
3655 struct ieee80211_local *local = hw_to_local(hw);
3656 struct net_device *dev = local->scan_dev;
3657 struct ieee80211_sub_if_data *sdata;
3658 union iwreq_data wrqu;
3659
3660 local->last_scan_completed = jiffies;
3661 memset(&wrqu, 0, sizeof(wrqu));
3662 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
3663
3664 if (local->sta_hw_scanning) {
3665 local->sta_hw_scanning = 0;
3666 if (ieee80211_hw_config(local))
3667 printk(KERN_DEBUG "%s: failed to restore operational "
3668 "channel after scan\n", dev->name);
3669 /* Restart STA timer for HW scan case */
3670 rcu_read_lock();
3671 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3672 ieee80211_restart_sta_timer(sdata);
3673 rcu_read_unlock();
3674
3675 goto done;
3676 }
3677
3678 local->sta_sw_scanning = 0;
3679 if (ieee80211_hw_config(local))
3680 printk(KERN_DEBUG "%s: failed to restore operational "
3681 "channel after scan\n", dev->name);
3682
3683
3684 netif_tx_lock_bh(local->mdev);
3685 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3686 local->ops->configure_filter(local_to_hw(local),
3687 FIF_BCN_PRBRESP_PROMISC,
3688 &local->filter_flags,
3689 local->mdev->mc_count,
3690 local->mdev->mc_list);
3691
3692 netif_tx_unlock_bh(local->mdev);
3693
3694 rcu_read_lock();
3695 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3696
3697 /* No need to wake the master device. */
3698 if (sdata->dev == local->mdev)
3699 continue;
3700
3701 /* Tell AP we're back */
3702 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3703 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3704 ieee80211_send_nullfunc(local, sdata, 0);
3705
3706 ieee80211_restart_sta_timer(sdata);
3707
3708 netif_wake_queue(sdata->dev);
3709 }
3710 rcu_read_unlock();
3711
3712 done:
3713 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3714 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3715 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3716 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3717 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3718 !ieee80211_sta_active_ibss(dev)))
3719 ieee80211_sta_find_ibss(dev, ifsta);
3720 }
3721 }
3722 EXPORT_SYMBOL(ieee80211_scan_completed);
3723
3724 void ieee80211_sta_scan_work(struct work_struct *work)
3725 {
3726 struct ieee80211_local *local =
3727 container_of(work, struct ieee80211_local, scan_work.work);
3728 struct net_device *dev = local->scan_dev;
3729 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3730 struct ieee80211_supported_band *sband;
3731 struct ieee80211_channel *chan;
3732 int skip;
3733 unsigned long next_delay = 0;
3734
3735 if (!local->sta_sw_scanning)
3736 return;
3737
3738 switch (local->scan_state) {
3739 case SCAN_SET_CHANNEL:
3740 /*
3741 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3742 * after we successfully scanned the last channel of the last
3743 * band (and the last band is supported by the hw)
3744 */
3745 if (local->scan_band < IEEE80211_NUM_BANDS)
3746 sband = local->hw.wiphy->bands[local->scan_band];
3747 else
3748 sband = NULL;
3749
3750 /*
3751 * If we are at an unsupported band and have more bands
3752 * left to scan, advance to the next supported one.
3753 */
3754 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
3755 local->scan_band++;
3756 sband = local->hw.wiphy->bands[local->scan_band];
3757 local->scan_channel_idx = 0;
3758 }
3759
3760 /* if no more bands/channels left, complete scan */
3761 if (!sband || local->scan_channel_idx >= sband->n_channels) {
3762 ieee80211_scan_completed(local_to_hw(local));
3763 return;
3764 }
3765 skip = 0;
3766 chan = &sband->channels[local->scan_channel_idx];
3767
3768 if (chan->flags & IEEE80211_CHAN_DISABLED ||
3769 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
3770 chan->flags & IEEE80211_CHAN_NO_IBSS))
3771 skip = 1;
3772
3773 if (!skip) {
3774 local->scan_channel = chan;
3775 if (ieee80211_hw_config(local)) {
3776 printk(KERN_DEBUG "%s: failed to set freq to "
3777 "%d MHz for scan\n", dev->name,
3778 chan->center_freq);
3779 skip = 1;
3780 }
3781 }
3782
3783 /* advance state machine to next channel/band */
3784 local->scan_channel_idx++;
3785 if (local->scan_channel_idx >= sband->n_channels) {
3786 /*
3787 * scan_band may end up == IEEE80211_NUM_BANDS, but
3788 * we'll catch that case above and complete the scan
3789 * if that is the case.
3790 */
3791 local->scan_band++;
3792 local->scan_channel_idx = 0;
3793 }
3794
3795 if (skip)
3796 break;
3797
3798 next_delay = IEEE80211_PROBE_DELAY +
3799 usecs_to_jiffies(local->hw.channel_change_time);
3800 local->scan_state = SCAN_SEND_PROBE;
3801 break;
3802 case SCAN_SEND_PROBE:
3803 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3804 local->scan_state = SCAN_SET_CHANNEL;
3805
3806 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3807 break;
3808 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3809 local->scan_ssid_len);
3810 next_delay = IEEE80211_CHANNEL_TIME;
3811 break;
3812 }
3813
3814 if (local->sta_sw_scanning)
3815 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3816 next_delay);
3817 }
3818
3819
3820 static int ieee80211_sta_start_scan(struct net_device *dev,
3821 u8 *ssid, size_t ssid_len)
3822 {
3823 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3824 struct ieee80211_sub_if_data *sdata;
3825
3826 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3827 return -EINVAL;
3828
3829 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3830 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3831 * BSSID: MACAddress
3832 * SSID
3833 * ScanType: ACTIVE, PASSIVE
3834 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3835 * a Probe frame during active scanning
3836 * ChannelList
3837 * MinChannelTime (>= ProbeDelay), in TU
3838 * MaxChannelTime: (>= MinChannelTime), in TU
3839 */
3840
3841 /* MLME-SCAN.confirm
3842 * BSSDescriptionSet
3843 * ResultCode: SUCCESS, INVALID_PARAMETERS
3844 */
3845
3846 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3847 if (local->scan_dev == dev)
3848 return 0;
3849 return -EBUSY;
3850 }
3851
3852 if (local->ops->hw_scan) {
3853 int rc = local->ops->hw_scan(local_to_hw(local),
3854 ssid, ssid_len);
3855 if (!rc) {
3856 local->sta_hw_scanning = 1;
3857 local->scan_dev = dev;
3858 }
3859 return rc;
3860 }
3861
3862 local->sta_sw_scanning = 1;
3863
3864 rcu_read_lock();
3865 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3866
3867 /* Don't stop the master interface, otherwise we can't transmit
3868 * probes! */
3869 if (sdata->dev == local->mdev)
3870 continue;
3871
3872 netif_stop_queue(sdata->dev);
3873 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3874 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
3875 ieee80211_send_nullfunc(local, sdata, 1);
3876 }
3877 rcu_read_unlock();
3878
3879 if (ssid) {
3880 local->scan_ssid_len = ssid_len;
3881 memcpy(local->scan_ssid, ssid, ssid_len);
3882 } else
3883 local->scan_ssid_len = 0;
3884 local->scan_state = SCAN_SET_CHANNEL;
3885 local->scan_channel_idx = 0;
3886 local->scan_band = IEEE80211_BAND_2GHZ;
3887 local->scan_dev = dev;
3888
3889 netif_tx_lock_bh(local->mdev);
3890 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3891 local->ops->configure_filter(local_to_hw(local),
3892 FIF_BCN_PRBRESP_PROMISC,
3893 &local->filter_flags,
3894 local->mdev->mc_count,
3895 local->mdev->mc_list);
3896 netif_tx_unlock_bh(local->mdev);
3897
3898 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3899 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3900 IEEE80211_CHANNEL_TIME);
3901
3902 return 0;
3903 }
3904
3905
3906 int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3907 {
3908 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3909 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3910 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3911
3912 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3913 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3914
3915 if (local->sta_sw_scanning || local->sta_hw_scanning) {
3916 if (local->scan_dev == dev)
3917 return 0;
3918 return -EBUSY;
3919 }
3920
3921 ifsta->scan_ssid_len = ssid_len;
3922 if (ssid_len)
3923 memcpy(ifsta->scan_ssid, ssid, ssid_len);
3924 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3925 queue_work(local->hw.workqueue, &ifsta->work);
3926 return 0;
3927 }
3928
3929 static char *
3930 ieee80211_sta_scan_result(struct net_device *dev,
3931 struct ieee80211_sta_bss *bss,
3932 char *current_ev, char *end_buf)
3933 {
3934 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3935 struct iw_event iwe;
3936
3937 if (time_after(jiffies,
3938 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3939 return current_ev;
3940
3941 memset(&iwe, 0, sizeof(iwe));
3942 iwe.cmd = SIOCGIWAP;
3943 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3944 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3945 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3946 IW_EV_ADDR_LEN);
3947
3948 memset(&iwe, 0, sizeof(iwe));
3949 iwe.cmd = SIOCGIWESSID;
3950 if (bss_mesh_cfg(bss)) {
3951 iwe.u.data.length = bss_mesh_id_len(bss);
3952 iwe.u.data.flags = 1;
3953 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3954 bss_mesh_id(bss));
3955 } else {
3956 iwe.u.data.length = bss->ssid_len;
3957 iwe.u.data.flags = 1;
3958 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3959 bss->ssid);
3960 }
3961
3962 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3963 || bss_mesh_cfg(bss)) {
3964 memset(&iwe, 0, sizeof(iwe));
3965 iwe.cmd = SIOCGIWMODE;
3966 if (bss_mesh_cfg(bss))
3967 iwe.u.mode = IW_MODE_MESH;
3968 else if (bss->capability & WLAN_CAPABILITY_ESS)
3969 iwe.u.mode = IW_MODE_MASTER;
3970 else
3971 iwe.u.mode = IW_MODE_ADHOC;
3972 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3973 IW_EV_UINT_LEN);
3974 }
3975
3976 memset(&iwe, 0, sizeof(iwe));
3977 iwe.cmd = SIOCGIWFREQ;
3978 iwe.u.freq.m = bss->freq;
3979 iwe.u.freq.e = 6;
3980 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3981 IW_EV_FREQ_LEN);
3982
3983 memset(&iwe, 0, sizeof(iwe));
3984 iwe.cmd = SIOCGIWFREQ;
3985 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3986 iwe.u.freq.e = 0;
3987 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3988 IW_EV_FREQ_LEN);
3989
3990 memset(&iwe, 0, sizeof(iwe));
3991 iwe.cmd = IWEVQUAL;
3992 iwe.u.qual.qual = bss->signal;
3993 iwe.u.qual.level = bss->rssi;
3994 iwe.u.qual.noise = bss->noise;
3995 iwe.u.qual.updated = local->wstats_flags;
3996 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3997 IW_EV_QUAL_LEN);
3998
3999 memset(&iwe, 0, sizeof(iwe));
4000 iwe.cmd = SIOCGIWENCODE;
4001 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4002 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4003 else
4004 iwe.u.data.flags = IW_ENCODE_DISABLED;
4005 iwe.u.data.length = 0;
4006 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4007
4008 if (bss && bss->wpa_ie) {
4009 memset(&iwe, 0, sizeof(iwe));
4010 iwe.cmd = IWEVGENIE;
4011 iwe.u.data.length = bss->wpa_ie_len;
4012 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4013 bss->wpa_ie);
4014 }
4015
4016 if (bss && bss->rsn_ie) {
4017 memset(&iwe, 0, sizeof(iwe));
4018 iwe.cmd = IWEVGENIE;
4019 iwe.u.data.length = bss->rsn_ie_len;
4020 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4021 bss->rsn_ie);
4022 }
4023
4024 if (bss && bss->supp_rates_len > 0) {
4025 /* display all supported rates in readable format */
4026 char *p = current_ev + IW_EV_LCP_LEN;
4027 int i;
4028
4029 memset(&iwe, 0, sizeof(iwe));
4030 iwe.cmd = SIOCGIWRATE;
4031 /* Those two flags are ignored... */
4032 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4033
4034 for (i = 0; i < bss->supp_rates_len; i++) {
4035 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4036 0x7f) * 500000);
4037 p = iwe_stream_add_value(current_ev, p,
4038 end_buf, &iwe, IW_EV_PARAM_LEN);
4039 }
4040 current_ev = p;
4041 }
4042
4043 if (bss) {
4044 char *buf;
4045 buf = kmalloc(30, GFP_ATOMIC);
4046 if (buf) {
4047 memset(&iwe, 0, sizeof(iwe));
4048 iwe.cmd = IWEVCUSTOM;
4049 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4050 iwe.u.data.length = strlen(buf);
4051 current_ev = iwe_stream_add_point(current_ev, end_buf,
4052 &iwe, buf);
4053 kfree(buf);
4054 }
4055 }
4056
4057 if (bss_mesh_cfg(bss)) {
4058 char *buf;
4059 u8 *cfg = bss_mesh_cfg(bss);
4060 buf = kmalloc(50, GFP_ATOMIC);
4061 if (buf) {
4062 memset(&iwe, 0, sizeof(iwe));
4063 iwe.cmd = IWEVCUSTOM;
4064 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4065 iwe.u.data.length = strlen(buf);
4066 current_ev = iwe_stream_add_point(current_ev, end_buf,
4067 &iwe, buf);
4068 sprintf(buf, "Path Selection Protocol ID: "
4069 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4070 cfg[4]);
4071 iwe.u.data.length = strlen(buf);
4072 current_ev = iwe_stream_add_point(current_ev, end_buf,
4073 &iwe, buf);
4074 sprintf(buf, "Path Selection Metric ID: "
4075 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4076 cfg[8]);
4077 iwe.u.data.length = strlen(buf);
4078 current_ev = iwe_stream_add_point(current_ev, end_buf,
4079 &iwe, buf);
4080 sprintf(buf, "Congestion Control Mode ID: "
4081 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4082 cfg[11], cfg[12]);
4083 iwe.u.data.length = strlen(buf);
4084 current_ev = iwe_stream_add_point(current_ev, end_buf,
4085 &iwe, buf);
4086 sprintf(buf, "Channel Precedence: "
4087 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4088 cfg[15], cfg[16]);
4089 iwe.u.data.length = strlen(buf);
4090 current_ev = iwe_stream_add_point(current_ev, end_buf,
4091 &iwe, buf);
4092 kfree(buf);
4093 }
4094 }
4095
4096 return current_ev;
4097 }
4098
4099
4100 int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4101 {
4102 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4103 char *current_ev = buf;
4104 char *end_buf = buf + len;
4105 struct ieee80211_sta_bss *bss;
4106
4107 spin_lock_bh(&local->sta_bss_lock);
4108 list_for_each_entry(bss, &local->sta_bss_list, list) {
4109 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4110 spin_unlock_bh(&local->sta_bss_lock);
4111 return -E2BIG;
4112 }
4113 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4114 end_buf);
4115 }
4116 spin_unlock_bh(&local->sta_bss_lock);
4117 return current_ev - buf;
4118 }
4119
4120
4121 int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4122 {
4123 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4124 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4125 kfree(ifsta->extra_ie);
4126 if (len == 0) {
4127 ifsta->extra_ie = NULL;
4128 ifsta->extra_ie_len = 0;
4129 return 0;
4130 }
4131 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4132 if (!ifsta->extra_ie) {
4133 ifsta->extra_ie_len = 0;
4134 return -ENOMEM;
4135 }
4136 memcpy(ifsta->extra_ie, ie, len);
4137 ifsta->extra_ie_len = len;
4138 return 0;
4139 }
4140
4141
4142 struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4143 struct sk_buff *skb, u8 *bssid,
4144 u8 *addr)
4145 {
4146 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4147 struct sta_info *sta;
4148 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4149 DECLARE_MAC_BUF(mac);
4150
4151 /* TODO: Could consider removing the least recently used entry and
4152 * allow new one to be added. */
4153 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4154 if (net_ratelimit()) {
4155 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
4156 "entry %s\n", dev->name, print_mac(mac, addr));
4157 }
4158 return NULL;
4159 }
4160
4161 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
4162 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
4163
4164 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4165 if (!sta)
4166 return NULL;
4167
4168 sta->flags |= WLAN_STA_AUTHORIZED;
4169
4170 sta->supp_rates[local->hw.conf.channel->band] =
4171 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
4172
4173 rate_control_rate_init(sta, local);
4174
4175 if (sta_info_insert(sta))
4176 return NULL;
4177
4178 return sta;
4179 }
4180
4181
4182 int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4183 {
4184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4185 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4186
4187 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4188 dev->name, reason);
4189
4190 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4191 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
4192 return -EINVAL;
4193
4194 ieee80211_send_deauth(dev, ifsta, reason);
4195 ieee80211_set_disassoc(dev, ifsta, 1);
4196 return 0;
4197 }
4198
4199
4200 int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4201 {
4202 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4203 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4204
4205 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4206 dev->name, reason);
4207
4208 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
4209 return -EINVAL;
4210
4211 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
4212 return -1;
4213
4214 ieee80211_send_disassoc(dev, ifsta, reason);
4215 ieee80211_set_disassoc(dev, ifsta, 0);
4216 return 0;
4217 }
Support for the Chinese Samsung S3C2440 based development boards