]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - net/mac80211/ieee80211_sta.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mac80211: A-MPDU Rx MLME data initialization
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 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:
f0706e82
JB		 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 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 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>
f0706e82
JB		 27#include <net/iw_handler.h>
28#include <asm/types.h>
f0706e82
JB		 29
30#include <net/mac80211.h>
31#include "ieee80211_i.h"
32#include "ieee80211_rate.h"
47f0c502 33#include "ieee80211_led.h"
f0706e82
JB		 34
35#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
36#define IEEE80211_AUTH_MAX_TRIES 3
37#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38#define IEEE80211_ASSOC_MAX_TRIES 3
39#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
40#define IEEE80211_PROBE_INTERVAL (60 * HZ)
41#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
42#define IEEE80211_SCAN_INTERVAL (2 * HZ)
43#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
44#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
45
46#define IEEE80211_PROBE_DELAY (HZ / 33)
47#define IEEE80211_CHANNEL_TIME (HZ / 33)
48#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
49#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
50#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
51#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
52
53#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
54
55
56#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
57
58#define ERP_INFO_USE_PROTECTION BIT(1)
59
9f985b0e
RR		 60/* mgmt header + 1 byte action code */
61#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
62
63#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
64#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
65#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
66
07db2183
RR		 67/* next values represent the buffer size for A-MPDU frame.
68 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
69#define IEEE80211_MIN_AMPDU_BUF 0x8
70#define IEEE80211_MAX_AMPDU_BUF 0x40
71
f0706e82
JB		 72static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
73 u8 *ssid, size_t ssid_len);
74static struct ieee80211_sta_bss *
cffdd30d
JL		 75ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
76 u8 *ssid, u8 ssid_len);
f0706e82
JB		 77static void ieee80211_rx_bss_put(struct net_device *dev,
78 struct ieee80211_sta_bss *bss);
79static int ieee80211_sta_find_ibss(struct net_device *dev,
80 struct ieee80211_if_sta *ifsta);
81static int ieee80211_sta_wep_configured(struct net_device *dev);
82static int ieee80211_sta_start_scan(struct net_device *dev,
83 u8 *ssid, size_t ssid_len);
84static int ieee80211_sta_config_auth(struct net_device *dev,
85 struct ieee80211_if_sta *ifsta);
86
87
88/* Parsed Information Elements */
89struct ieee802_11_elems {
5558235c 90 /* pointers to IEs */
f0706e82 91 u8 *ssid;
f0706e82 92 u8 *supp_rates;
f0706e82 93 u8 *fh_params;
f0706e82 94 u8 *ds_params;
f0706e82 95 u8 *cf_params;
f0706e82 96 u8 *tim;
f0706e82 97 u8 *ibss_params;
f0706e82 98 u8 *challenge;
f0706e82 99 u8 *wpa;
f0706e82 100 u8 *rsn;
f0706e82 101 u8 *erp_info;
f0706e82 102 u8 *ext_supp_rates;
f0706e82 103 u8 *wmm_info;
f0706e82 104 u8 *wmm_param;
c7153508
RR		 105 u8 *ht_cap_elem;
106 u8 *ht_info_elem;
5558235c
JB		 107 /* length of them, respectively */
108 u8 ssid_len;
109 u8 supp_rates_len;
110 u8 fh_params_len;
111 u8 ds_params_len;
112 u8 cf_params_len;
113 u8 tim_len;
114 u8 ibss_params_len;
115 u8 challenge_len;
116 u8 wpa_len;
117 u8 rsn_len;
118 u8 erp_info_len;
119 u8 ext_supp_rates_len;
120 u8 wmm_info_len;
f0706e82 121 u8 wmm_param_len;
c7153508
RR		 122 u8 ht_cap_elem_len;
123 u8 ht_info_elem_len;
f0706e82
JB		 124};
125
67a4cce4
JL		 126static void ieee802_11_parse_elems(u8 *start, size_t len,
127 struct ieee802_11_elems *elems)
f0706e82
JB		 128{
129 size_t left = len;
130 u8 *pos = start;
f0706e82
JB		 131
132 memset(elems, 0, sizeof(*elems));
133
134 while (left >= 2) {
135 u8 id, elen;
136
137 id = *pos++;
138 elen = *pos++;
139 left -= 2;
140
67a4cce4
JL		 141 if (elen > left)
142 return;
f0706e82
JB		 143
144 switch (id) {
145 case WLAN_EID_SSID:
146 elems->ssid = pos;
147 elems->ssid_len = elen;
148 break;
149 case WLAN_EID_SUPP_RATES:
150 elems->supp_rates = pos;
151 elems->supp_rates_len = elen;
152 break;
153 case WLAN_EID_FH_PARAMS:
154 elems->fh_params = pos;
155 elems->fh_params_len = elen;
156 break;
157 case WLAN_EID_DS_PARAMS:
158 elems->ds_params = pos;
159 elems->ds_params_len = elen;
160 break;
161 case WLAN_EID_CF_PARAMS:
162 elems->cf_params = pos;
163 elems->cf_params_len = elen;
164 break;
165 case WLAN_EID_TIM:
166 elems->tim = pos;
167 elems->tim_len = elen;
168 break;
169 case WLAN_EID_IBSS_PARAMS:
170 elems->ibss_params = pos;
171 elems->ibss_params_len = elen;
172 break;
173 case WLAN_EID_CHALLENGE:
174 elems->challenge = pos;
175 elems->challenge_len = elen;
176 break;
177 case WLAN_EID_WPA:
178 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
179 pos[2] == 0xf2) {
180 /* Microsoft OUI (00:50:F2) */
181 if (pos[3] == 1) {
182 /* OUI Type 1 - WPA IE */
183 elems->wpa = pos;
184 elems->wpa_len = elen;
185 } else if (elen >= 5 && pos[3] == 2) {
186 if (pos[4] == 0) {
187 elems->wmm_info = pos;
188 elems->wmm_info_len = elen;
189 } else if (pos[4] == 1) {
190 elems->wmm_param = pos;
191 elems->wmm_param_len = elen;
192 }
193 }
194 }
195 break;
196 case WLAN_EID_RSN:
197 elems->rsn = pos;
198 elems->rsn_len = elen;
199 break;
200 case WLAN_EID_ERP_INFO:
201 elems->erp_info = pos;
202 elems->erp_info_len = elen;
203 break;
204 case WLAN_EID_EXT_SUPP_RATES:
205 elems->ext_supp_rates = pos;
206 elems->ext_supp_rates_len = elen;
207 break;
c7153508
RR		 208 case WLAN_EID_HT_CAPABILITY:
209 elems->ht_cap_elem = pos;
210 elems->ht_cap_elem_len = elen;
211 break;
212 case WLAN_EID_HT_EXTRA_INFO:
213 elems->ht_info_elem = pos;
214 elems->ht_info_elem_len = elen;
215 break;
f0706e82 216 default:
f0706e82
JB		 217 break;
218 }
219
220 left -= elen;
221 pos += elen;
222 }
f0706e82
JB		 223}
224
225
f0706e82
JB		 226static int ecw2cw(int ecw)
227{
228 int cw = 1;
229 while (ecw > 0) {
230 cw <<= 1;
231 ecw--;
232 }
233 return cw - 1;
234}
235
f0706e82
JB		 236static void ieee80211_sta_wmm_params(struct net_device *dev,
237 struct ieee80211_if_sta *ifsta,
238 u8 *wmm_param, size_t wmm_param_len)
239{
240 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
241 struct ieee80211_tx_queue_params params;
242 size_t left;
243 int count;
244 u8 *pos;
245
246 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
247 return;
248 count = wmm_param[6] & 0x0f;
249 if (count == ifsta->wmm_last_param_set)
250 return;
251 ifsta->wmm_last_param_set = count;
252
253 pos = wmm_param + 8;
254 left = wmm_param_len - 8;
255
256 memset(&params, 0, sizeof(params));
257
258 if (!local->ops->conf_tx)
259 return;
260
261 local->wmm_acm = 0;
262 for (; left >= 4; left -= 4, pos += 4) {
263 int aci = (pos[0] >> 5) & 0x03;
264 int acm = (pos[0] >> 4) & 0x01;
265 int queue;
266
267 switch (aci) {
268 case 1:
269 queue = IEEE80211_TX_QUEUE_DATA3;
270 if (acm) {
271 local->wmm_acm |= BIT(0) | BIT(3);
272 }
273 break;
274 case 2:
275 queue = IEEE80211_TX_QUEUE_DATA1;
276 if (acm) {
277 local->wmm_acm |= BIT(4) | BIT(5);
278 }
279 break;
280 case 3:
281 queue = IEEE80211_TX_QUEUE_DATA0;
282 if (acm) {
283 local->wmm_acm |= BIT(6) | BIT(7);
284 }
285 break;
286 case 0:
287 default:
288 queue = IEEE80211_TX_QUEUE_DATA2;
289 if (acm) {
290 local->wmm_acm |= BIT(1) | BIT(2);
291 }
292 break;
293 }
294
295 params.aifs = pos[0] & 0x0f;
296 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
297 params.cw_min = ecw2cw(pos[1] & 0x0f);
298 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
299 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
300 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
301 "cWmin=%d cWmax=%d burst=%d\n",
302 dev->name, queue, aci, acm, params.aifs, params.cw_min,
303 params.cw_max, params.burst_time);
304 /* TODO: handle ACM (block TX, fallback to next lowest allowed
305 * AC for now) */
306 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
307 printk(KERN_DEBUG "%s: failed to set TX queue "
308 "parameters for queue %d\n", dev->name, queue);
309 }
310 }
311}
312
313
5628221c
DD		 314static void ieee80211_handle_erp_ie(struct net_device *dev, u8 erp_value)
315{
5628221c
DD		 316 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
317 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
318 int use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
7e9ed188 319 int preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
d9430a32 320 u8 changes = 0;
0795af57 321 DECLARE_MAC_BUF(mac);
5628221c 322
13262ffd 323 if (use_protection != !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION)) {
5628221c
DD		 324 if (net_ratelimit()) {
325 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 326 "%s)\n",
5628221c
DD		 327 dev->name,
328 use_protection ? "enabled" : "disabled",
0795af57 329 print_mac(mac, ifsta->bssid));
5628221c 330 }
13262ffd
JS		 331 if (use_protection)
332 sdata->flags |= IEEE80211_SDATA_USE_PROTECTION;
333 else
334 sdata->flags &= ~IEEE80211_SDATA_USE_PROTECTION;
d9430a32 335 changes |= IEEE80211_ERP_CHANGE_PROTECTION;
5628221c 336 }
7e9ed188 337
13262ffd 338 if (preamble_mode != !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE)) {
7e9ed188
DD		 339 if (net_ratelimit()) {
340 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 341 " (BSSID=%s)\n",
7e9ed188
DD		 342 dev->name,
343 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
344 "short" : "long",
0795af57 345 print_mac(mac, ifsta->bssid));
7e9ed188 346 }
13262ffd
JS		 347 if (preamble_mode)
348 sdata->flags &= ~IEEE80211_SDATA_SHORT_PREAMBLE;
349 else
350 sdata->flags |= IEEE80211_SDATA_SHORT_PREAMBLE;
d9430a32 351 changes |= IEEE80211_ERP_CHANGE_PREAMBLE;
7e9ed188 352 }
d9430a32
DD		 353
354 if (changes)
355 ieee80211_erp_info_change_notify(dev, changes);
5628221c
DD		 356}
357
c7153508
RR		 358int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
359 struct ieee80211_ht_info *ht_info)
360{
361
362 if (ht_info == NULL)
363 return -EINVAL;
364
365 memset(ht_info, 0, sizeof(*ht_info));
366
367 if (ht_cap_ie) {
368 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
369
370 ht_info->ht_supported = 1;
371 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
372 ht_info->ampdu_factor =
373 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
374 ht_info->ampdu_density =
375 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
376 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
377 } else
378 ht_info->ht_supported = 0;
379
380 return 0;
381}
382
383int ieee80211_ht_addt_info_ie_to_ht_bss_info(
384 struct ieee80211_ht_addt_info *ht_add_info_ie,
385 struct ieee80211_ht_bss_info *bss_info)
386{
387 if (bss_info == NULL)
388 return -EINVAL;
389
390 memset(bss_info, 0, sizeof(*bss_info));
391
392 if (ht_add_info_ie) {
393 u16 op_mode;
394 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
395
396 bss_info->primary_channel = ht_add_info_ie->control_chan;
397 bss_info->bss_cap = ht_add_info_ie->ht_param;
398 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
399 }
400
401 return 0;
402}
5628221c 403
f0706e82
JB		 404static void ieee80211_sta_send_associnfo(struct net_device *dev,
405 struct ieee80211_if_sta *ifsta)
406{
407 char *buf;
408 size_t len;
409 int i;
410 union iwreq_data wrqu;
411
412 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
413 return;
414
415 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 416 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 417 if (!buf)
418 return;
419
420 len = sprintf(buf, "ASSOCINFO(");
421 if (ifsta->assocreq_ies) {
422 len += sprintf(buf + len, "ReqIEs=");
423 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
424 len += sprintf(buf + len, "%02x",
425 ifsta->assocreq_ies[i]);
426 }
427 }
428 if (ifsta->assocresp_ies) {
429 if (ifsta->assocreq_ies)
430 len += sprintf(buf + len, " ");
431 len += sprintf(buf + len, "RespIEs=");
432 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
433 len += sprintf(buf + len, "%02x",
434 ifsta->assocresp_ies[i]);
435 }
436 }
437 len += sprintf(buf + len, ")");
438
439 if (len > IW_CUSTOM_MAX) {
440 len = sprintf(buf, "ASSOCRESPIE=");
441 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
442 len += sprintf(buf + len, "%02x",
443 ifsta->assocresp_ies[i]);
444 }
445 }
446
447 memset(&wrqu, 0, sizeof(wrqu));
448 wrqu.data.length = len;
449 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
450
451 kfree(buf);
452}
453
454
455static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 456 struct ieee80211_if_sta *ifsta,
47f0c502 457 bool assoc)
f0706e82 458{
47f0c502 459 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 460 union iwreq_data wrqu;
461
d6f2da5b 462 if (!!(ifsta->flags & IEEE80211_STA_ASSOCIATED) == assoc)
f0706e82
JB		 463 return;
464
f0706e82
JB		 465 if (assoc) {
466 struct ieee80211_sub_if_data *sdata;
5628221c 467 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 468
469 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
470
f0706e82
JB		 471 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
472 if (sdata->type != IEEE80211_IF_TYPE_STA)
473 return;
5628221c 474
65c107ab 475 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 476 local->hw.conf.channel,
477 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 478 if (bss) {
479 if (bss->has_erp_value)
480 ieee80211_handle_erp_ie(dev, bss->erp_value);
481 ieee80211_rx_bss_put(dev, bss);
482 }
483
f0706e82 484 netif_carrier_on(dev);
d6f2da5b 485 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 486 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
487 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
488 ieee80211_sta_send_associnfo(dev, ifsta);
489 } else {
d6f2da5b
JS		 490 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
491
f0706e82 492 netif_carrier_off(dev);
d9430a32 493 ieee80211_reset_erp_info(dev);
f0706e82
JB		 494 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
495 }
496 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
497 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
498 ifsta->last_probe = jiffies;
47f0c502 499 ieee80211_led_assoc(local, assoc);
f0706e82
JB		 500}
501
502static void ieee80211_set_disassoc(struct net_device *dev,
503 struct ieee80211_if_sta *ifsta, int deauth)
504{
505 if (deauth)
506 ifsta->auth_tries = 0;
507 ifsta->assoc_tries = 0;
508 ieee80211_set_associated(dev, ifsta, 0);
509}
510
511static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
512 int encrypt)
513{
514 struct ieee80211_sub_if_data *sdata;
515 struct ieee80211_tx_packet_data *pkt_data;
516
517 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
518 skb->dev = sdata->local->mdev;
519 skb_set_mac_header(skb, 0);
520 skb_set_network_header(skb, 0);
521 skb_set_transport_header(skb, 0);
522
523 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
524 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
525 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 526 if (!encrypt)
527 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 528
529 dev_queue_xmit(skb);
530}
531
532
533static void ieee80211_send_auth(struct net_device *dev,
534 struct ieee80211_if_sta *ifsta,
535 int transaction, u8 *extra, size_t extra_len,
536 int encrypt)
537{
538 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
539 struct sk_buff *skb;
540 struct ieee80211_mgmt *mgmt;
541
542 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
543 sizeof(*mgmt) + 6 + extra_len);
544 if (!skb) {
545 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
546 "frame\n", dev->name);
547 return;
548 }
549 skb_reserve(skb, local->hw.extra_tx_headroom);
550
551 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
552 memset(mgmt, 0, 24 + 6);
553 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
554 IEEE80211_STYPE_AUTH);
555 if (encrypt)
556 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
557 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
558 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
559 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
560 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
561 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
562 ifsta->auth_transaction = transaction + 1;
563 mgmt->u.auth.status_code = cpu_to_le16(0);
564 if (extra)
565 memcpy(skb_put(skb, extra_len), extra, extra_len);
566
567 ieee80211_sta_tx(dev, skb, encrypt);
568}
569
570
571static void ieee80211_authenticate(struct net_device *dev,
572 struct ieee80211_if_sta *ifsta)
573{
0795af57
JP		 574 DECLARE_MAC_BUF(mac);
575
f0706e82
JB		 576 ifsta->auth_tries++;
577 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 578 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 579 " timed out\n",
0795af57 580 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 581 ifsta->state = IEEE80211_DISABLED;
582 return;
583 }
584
585 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 586 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
587 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 588
589 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
590
591 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
592}
593
594
595static void ieee80211_send_assoc(struct net_device *dev,
596 struct ieee80211_if_sta *ifsta)
597{
598 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
599 struct ieee80211_hw_mode *mode;
600 struct sk_buff *skb;
601 struct ieee80211_mgmt *mgmt;
602 u8 *pos, *ies;
603 int i, len;
604 u16 capab;
605 struct ieee80211_sta_bss *bss;
606 int wmm = 0;
607
608 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
609 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
610 ifsta->ssid_len);
611 if (!skb) {
612 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
613 "frame\n", dev->name);
614 return;
615 }
616 skb_reserve(skb, local->hw.extra_tx_headroom);
617
618 mode = local->oper_hw_mode;
619 capab = ifsta->capab;
620 if (mode->mode == MODE_IEEE80211G) {
621 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
622 WLAN_CAPABILITY_SHORT_PREAMBLE;
623 }
cffdd30d
JL		 624 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
625 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 626 if (bss) {
627 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
628 capab |= WLAN_CAPABILITY_PRIVACY;
629 if (bss->wmm_ie) {
630 wmm = 1;
631 }
632 ieee80211_rx_bss_put(dev, bss);
633 }
634
635 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
636 memset(mgmt, 0, 24);
637 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
638 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
639 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
640
d6f2da5b 641 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 642 skb_put(skb, 10);
643 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
644 IEEE80211_STYPE_REASSOC_REQ);
645 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
646 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
647 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
648 ETH_ALEN);
649 } else {
650 skb_put(skb, 4);
651 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
652 IEEE80211_STYPE_ASSOC_REQ);
653 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
654 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
655 }
656
657 /* SSID */
658 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
659 *pos++ = WLAN_EID_SSID;
660 *pos++ = ifsta->ssid_len;
661 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
662
663 len = mode->num_rates;
664 if (len > 8)
665 len = 8;
666 pos = skb_put(skb, len + 2);
667 *pos++ = WLAN_EID_SUPP_RATES;
668 *pos++ = len;
669 for (i = 0; i < len; i++) {
670 int rate = mode->rates[i].rate;
f0706e82
JB		 671 *pos++ = (u8) (rate / 5);
672 }
673
674 if (mode->num_rates > len) {
675 pos = skb_put(skb, mode->num_rates - len + 2);
676 *pos++ = WLAN_EID_EXT_SUPP_RATES;
677 *pos++ = mode->num_rates - len;
678 for (i = len; i < mode->num_rates; i++) {
679 int rate = mode->rates[i].rate;
f0706e82
JB		 680 *pos++ = (u8) (rate / 5);
681 }
682 }
683
684 if (ifsta->extra_ie) {
685 pos = skb_put(skb, ifsta->extra_ie_len);
686 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
687 }
688
d6f2da5b 689 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 690 pos = skb_put(skb, 9);
691 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
692 *pos++ = 7; /* len */
693 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
694 *pos++ = 0x50;
695 *pos++ = 0xf2;
696 *pos++ = 2; /* WME */
697 *pos++ = 0; /* WME info */
698 *pos++ = 1; /* WME ver */
699 *pos++ = 0;
700 }
c7153508
RR		 701 /* wmm support is a must to HT */
702 if (wmm && mode->ht_info.ht_supported) {
703 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
704 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
705 *pos++ = WLAN_EID_HT_CAPABILITY;
706 *pos++ = sizeof(struct ieee80211_ht_cap);
707 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
708 memcpy(pos, &tmp, sizeof(u16));
709 pos += sizeof(u16);
710 *pos++ = (mode->ht_info.ampdu_factor |
711 (mode->ht_info.ampdu_density << 2));
712 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
713 }
f0706e82
JB		 714
715 kfree(ifsta->assocreq_ies);
716 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 717 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 718 if (ifsta->assocreq_ies)
719 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
720
721 ieee80211_sta_tx(dev, skb, 0);
722}
723
724
725static void ieee80211_send_deauth(struct net_device *dev,
726 struct ieee80211_if_sta *ifsta, u16 reason)
727{
728 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
729 struct sk_buff *skb;
730 struct ieee80211_mgmt *mgmt;
731
732 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
733 if (!skb) {
734 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
735 "frame\n", dev->name);
736 return;
737 }
738 skb_reserve(skb, local->hw.extra_tx_headroom);
739
740 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
741 memset(mgmt, 0, 24);
742 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
743 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
744 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
745 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
746 IEEE80211_STYPE_DEAUTH);
747 skb_put(skb, 2);
748 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
749
750 ieee80211_sta_tx(dev, skb, 0);
751}
752
753
754static void ieee80211_send_disassoc(struct net_device *dev,
755 struct ieee80211_if_sta *ifsta, u16 reason)
756{
757 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
758 struct sk_buff *skb;
759 struct ieee80211_mgmt *mgmt;
760
761 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
762 if (!skb) {
763 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
764 "frame\n", dev->name);
765 return;
766 }
767 skb_reserve(skb, local->hw.extra_tx_headroom);
768
769 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
770 memset(mgmt, 0, 24);
771 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
772 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
773 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
774 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
775 IEEE80211_STYPE_DISASSOC);
776 skb_put(skb, 2);
777 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
778
779 ieee80211_sta_tx(dev, skb, 0);
780}
781
782
783static int ieee80211_privacy_mismatch(struct net_device *dev,
784 struct ieee80211_if_sta *ifsta)
785{
65c107ab 786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 787 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 788 int bss_privacy;
789 int wep_privacy;
790 int privacy_invoked;
f0706e82 791
5b98b1f7 792 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 793 return 0;
794
cffdd30d
JL		 795 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
796 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 797 if (!bss)
798 return 0;
799
5b98b1f7
JB		 800 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
801 wep_privacy = !!ieee80211_sta_wep_configured(dev);
802 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 803
804 ieee80211_rx_bss_put(dev, bss);
805
5b98b1f7
JB		 806 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
807 return 0;
808
809 return 1;
f0706e82
JB		 810}
811
812
813static void ieee80211_associate(struct net_device *dev,
814 struct ieee80211_if_sta *ifsta)
815{
0795af57
JP		 816 DECLARE_MAC_BUF(mac);
817
f0706e82
JB		 818 ifsta->assoc_tries++;
819 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 820 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 821 " timed out\n",
0795af57 822 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 823 ifsta->state = IEEE80211_DISABLED;
824 return;
825 }
826
827 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 828 printk(KERN_DEBUG "%s: associate with AP %s\n",
829 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 830 if (ieee80211_privacy_mismatch(dev, ifsta)) {
831 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
832 "mixed-cell disabled - abort association\n", dev->name);
833 ifsta->state = IEEE80211_DISABLED;
834 return;
835 }
836
837 ieee80211_send_assoc(dev, ifsta);
838
839 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
840}
841
842
843static void ieee80211_associated(struct net_device *dev,
844 struct ieee80211_if_sta *ifsta)
845{
846 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
847 struct sta_info *sta;
848 int disassoc;
0795af57 849 DECLARE_MAC_BUF(mac);
f0706e82
JB		 850
851 /* TODO: start monitoring current AP signal quality and number of
852 * missed beacons. Scan other channels every now and then and search
853 * for better APs. */
854 /* TODO: remove expired BSSes */
855
856 ifsta->state = IEEE80211_ASSOCIATED;
857
858 sta = sta_info_get(local, ifsta->bssid);
859 if (!sta) {
0795af57
JP		 860 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
861 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 862 disassoc = 1;
863 } else {
864 disassoc = 0;
865 if (time_after(jiffies,
866 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 867 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 868 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 869 "current AP %s - assume out of "
f0706e82 870 "range\n",
0795af57 871 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 872 disassoc = 1;
be8755e1 873 sta_info_free(sta);
d6f2da5b 874 } else
f0706e82
JB		 875 ieee80211_send_probe_req(dev, ifsta->bssid,
876 local->scan_ssid,
877 local->scan_ssid_len);
d6f2da5b 878 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 879 } else {
d6f2da5b 880 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 881 if (time_after(jiffies, ifsta->last_probe +
882 IEEE80211_PROBE_INTERVAL)) {
883 ifsta->last_probe = jiffies;
884 ieee80211_send_probe_req(dev, ifsta->bssid,
885 ifsta->ssid,
886 ifsta->ssid_len);
887 }
888 }
889 sta_info_put(sta);
890 }
891 if (disassoc) {
2d192d95
MW		 892 ifsta->state = IEEE80211_DISABLED;
893 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 894 } else {
895 mod_timer(&ifsta->timer, jiffies +
896 IEEE80211_MONITORING_INTERVAL);
897 }
898}
899
900
901static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
902 u8 *ssid, size_t ssid_len)
903{
904 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
905 struct ieee80211_hw_mode *mode;
906 struct sk_buff *skb;
907 struct ieee80211_mgmt *mgmt;
908 u8 *pos, *supp_rates, *esupp_rates = NULL;
909 int i;
910
911 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
912 if (!skb) {
913 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
914 "request\n", dev->name);
915 return;
916 }
917 skb_reserve(skb, local->hw.extra_tx_headroom);
918
919 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
920 memset(mgmt, 0, 24);
921 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
922 IEEE80211_STYPE_PROBE_REQ);
923 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
924 if (dst) {
925 memcpy(mgmt->da, dst, ETH_ALEN);
926 memcpy(mgmt->bssid, dst, ETH_ALEN);
927 } else {
928 memset(mgmt->da, 0xff, ETH_ALEN);
929 memset(mgmt->bssid, 0xff, ETH_ALEN);
930 }
931 pos = skb_put(skb, 2 + ssid_len);
932 *pos++ = WLAN_EID_SSID;
933 *pos++ = ssid_len;
934 memcpy(pos, ssid, ssid_len);
935
936 supp_rates = skb_put(skb, 2);
937 supp_rates[0] = WLAN_EID_SUPP_RATES;
938 supp_rates[1] = 0;
939 mode = local->oper_hw_mode;
940 for (i = 0; i < mode->num_rates; i++) {
941 struct ieee80211_rate *rate = &mode->rates[i];
942 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
943 continue;
944 if (esupp_rates) {
945 pos = skb_put(skb, 1);
946 esupp_rates[1]++;
947 } else if (supp_rates[1] == 8) {
948 esupp_rates = skb_put(skb, 3);
949 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
950 esupp_rates[1] = 1;
951 pos = &esupp_rates[2];
952 } else {
953 pos = skb_put(skb, 1);
954 supp_rates[1]++;
955 }
b708e610 956 *pos = rate->rate / 5;
f0706e82
JB		 957 }
958
959 ieee80211_sta_tx(dev, skb, 0);
960}
961
962
963static int ieee80211_sta_wep_configured(struct net_device *dev)
964{
965 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
966 if (!sdata || !sdata->default_key ||
8f20fc24 967 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 968 return 0;
969 return 1;
970}
971
972
973static void ieee80211_auth_completed(struct net_device *dev,
974 struct ieee80211_if_sta *ifsta)
975{
976 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 977 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 978 ieee80211_associate(dev, ifsta);
979}
980
981
982static void ieee80211_auth_challenge(struct net_device *dev,
983 struct ieee80211_if_sta *ifsta,
984 struct ieee80211_mgmt *mgmt,
985 size_t len)
986{
987 u8 *pos;
988 struct ieee802_11_elems elems;
989
990 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
991 pos = mgmt->u.auth.variable;
67a4cce4 992 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 993 if (!elems.challenge) {
994 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
995 "frame\n", dev->name);
996 return;
997 }
998 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
999 elems.challenge_len + 2, 1);
1000}
1001
9f985b0e
RR		 1002static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1003 u8 dialog_token, u16 status, u16 policy,
1004 u16 buf_size, u16 timeout)
1005{
1006 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1008 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1009 struct sk_buff *skb;
1010 struct ieee80211_mgmt *mgmt;
1011 u16 capab;
1012
07db2183
RR		 1013 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1014 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1015 if (!skb) {
1016 printk(KERN_DEBUG "%s: failed to allocate buffer "
1017 "for addba resp frame\n", dev->name);
1018 return;
1019 }
1020
1021 skb_reserve(skb, local->hw.extra_tx_headroom);
1022 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1023 memset(mgmt, 0, 24);
1024 memcpy(mgmt->da, da, ETH_ALEN);
1025 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1026 if (sdata->type == IEEE80211_IF_TYPE_AP)
1027 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1028 else
1029 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1030 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1031 IEEE80211_STYPE_ACTION);
1032
1033 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1034 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1035 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1036 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1037
1038 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1039 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1040 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1041
1042 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1043 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1044 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1045
1046 ieee80211_sta_tx(dev, skb, 0);
1047
1048 return;
1049}
1050
1051static void ieee80211_sta_process_addba_request(struct net_device *dev,
1052 struct ieee80211_mgmt *mgmt,
1053 size_t len)
1054{
1055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1056 struct ieee80211_hw *hw = &local->hw;
1057 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1058 struct sta_info *sta;
07db2183
RR		 1059 struct tid_ampdu_rx *tid_agg_rx;
1060 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1061 u8 dialog_token;
07db2183
RR		 1062 int ret = -EOPNOTSUPP;
1063 DECLARE_MAC_BUF(mac);
9f985b0e
RR		 1064
1065 sta = sta_info_get(local, mgmt->sa);
1066 if (!sta)
1067 return;
1068
1069 /* extract session parameters from addba request frame */
1070 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1071 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1072 start_seq_num =
1073 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1074
1075 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1076 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1077 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1078 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1079
9f985b0e
RR		 1080 status = WLAN_STATUS_REQUEST_DECLINED;
1081
07db2183
RR		 1082 /* sanity check for incoming parameters:
1083 * check if configuration can support the BA policy
1084 * and if buffer size does not exceeds max value */
1085 if (((ba_policy != 1)
1086 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1087 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1088 status = WLAN_STATUS_INVALID_QOS_PARAM;
1089#ifdef CONFIG_MAC80211_HT_DEBUG
1090 if (net_ratelimit())
1091 printk(KERN_DEBUG "Block Ack Req with bad params from "
1092 "%s on tid %u. policy %d, buffer size %d\n",
1093 print_mac(mac, mgmt->sa), tid, ba_policy,
1094 buf_size);
1095#endif /* CONFIG_MAC80211_HT_DEBUG */
1096 goto end_no_lock;
1097 }
1098 /* determine default buffer size */
1099 if (buf_size == 0) {
1100 struct ieee80211_hw_mode *mode = conf->mode;
1101 buf_size = IEEE80211_MIN_AMPDU_BUF;
1102 buf_size = buf_size << mode->ht_info.ampdu_factor;
1103 }
1104
1105 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1106
1107 /* examine state machine */
1108 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1109
1110 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1111#ifdef CONFIG_MAC80211_HT_DEBUG
1112 if (net_ratelimit())
1113 printk(KERN_DEBUG "unexpected Block Ack Req from "
1114 "%s on tid %u\n",
1115 print_mac(mac, mgmt->sa), tid);
1116#endif /* CONFIG_MAC80211_HT_DEBUG */
1117 goto end;
1118 }
1119
1120 /* prepare reordering buffer */
1121 tid_agg_rx->reorder_buf =
1122 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
1123 if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) {
1124 printk(KERN_ERR "can not allocate reordering buffer "
1125 "to tid %d\n", tid);
1126 goto end;
1127 }
1128 memset(tid_agg_rx->reorder_buf, 0,
1129 buf_size * sizeof(struct sk_buf *));
1130
1131 if (local->ops->ampdu_action)
1132 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
1133 sta->addr, tid, start_seq_num);
1134#ifdef CONFIG_MAC80211_HT_DEBUG
1135 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1136#endif /* CONFIG_MAC80211_HT_DEBUG */
1137
1138 if (ret) {
1139 kfree(tid_agg_rx->reorder_buf);
1140 goto end;
1141 }
1142
1143 /* change state and send addba resp */
1144 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1145 tid_agg_rx->dialog_token = dialog_token;
1146 tid_agg_rx->ssn = start_seq_num;
1147 tid_agg_rx->head_seq_num = start_seq_num;
1148 tid_agg_rx->buf_size = buf_size;
1149 tid_agg_rx->timeout = timeout;
1150 tid_agg_rx->stored_mpdu_num = 0;
1151 status = WLAN_STATUS_SUCCESS;
1152end:
1153 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1154
1155end_no_lock:
9f985b0e
RR		 1156 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1157 status, 1, buf_size, timeout);
1158 sta_info_put(sta);
1159}
f0706e82 1160
07db2183
RR		 1161void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1162 u16 initiator, u16 reason_code)
1163{
1164 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1165 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1166 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1167 struct sk_buff *skb;
1168 struct ieee80211_mgmt *mgmt;
1169 u16 params;
1170
1171 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1172 sizeof(mgmt->u.action.u.delba));
1173
1174 if (!skb) {
1175 printk(KERN_ERR "%s: failed to allocate buffer "
1176 "for delba frame\n", dev->name);
1177 return;
1178 }
1179
1180 skb_reserve(skb, local->hw.extra_tx_headroom);
1181 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1182 memset(mgmt, 0, 24);
1183 memcpy(mgmt->da, da, ETH_ALEN);
1184 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1185 if (sdata->type == IEEE80211_IF_TYPE_AP)
1186 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1187 else
1188 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1189 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1190 IEEE80211_STYPE_ACTION);
1191
1192 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1193
1194 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1195 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1196 params = (u16)(initiator << 11); /* bit 11 initiator */
1197 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1198
1199 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1200 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1201
1202 ieee80211_sta_tx(dev, skb, 0);
1203}
1204
1205void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1206 u16 initiator, u16 reason)
1207{
1208 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1209 struct ieee80211_hw *hw = &local->hw;
1210 struct sta_info *sta;
1211 int ret;
1212
1213 sta = sta_info_get(local, ra);
1214 if (!sta)
1215 return;
1216
1217 /* check if TID is in operational state */
1218 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1219 if (sta->ampdu_mlme.tid_rx[tid].state
1220 != HT_AGG_STATE_OPERATIONAL) {
1221 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1222 if (net_ratelimit())
1223 printk(KERN_DEBUG "rx BA session requested to stop on "
1224 "inactive tid %d\n", tid);
1225 sta_info_put(sta);
1226 return;
1227 }
1228 sta->ampdu_mlme.tid_rx[tid].state =
1229 HT_AGG_STATE_REQ_STOP_BA_MSK |
1230 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1231 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1232
1233 /* stop HW Rx aggregation. ampdu_action existence
1234 * already verified in session init so we add the BUG_ON */
1235 BUG_ON(!local->ops->ampdu_action);
1236
1237 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
1238 ra, tid, EINVAL);
1239 if (ret)
1240 printk(KERN_DEBUG "HW problem - can not stop rx "
1241 "aggergation for tid %d\n", tid);
1242
1243 /* shutdown timer has not expired */
1244 if (initiator != WLAN_BACK_TIMER)
1245 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1246 session_timer);
1247
1248 /* check if this is a self generated aggregation halt */
1249 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1250 ieee80211_send_delba(dev, ra, tid, 0, reason);
1251
1252 /* free the reordering buffer */
1253 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1254
1255 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1256 sta_info_put(sta);
1257}
1258
1259/*
1260 * After receiving Block Ack Request (BAR) we activated a
1261 * timer after each frame arrives from the originator.
1262 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1263 */
1264void sta_rx_agg_session_timer_expired(unsigned long data)
1265{
1266 /* not an elegant detour, but there is no choice as the timer passes
1267 * only one argument, and verious sta_info are needed here, so init
1268 * flow in sta_info_add gives the TID as data, while the timer_to_id
1269 * array gives the sta through container_of */
1270 u8 *ptid = (u8 *)data;
1271 u8 *timer_to_id = ptid - *ptid;
1272 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1273 timer_to_tid[0]);
1274
1275 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1276 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1277 WLAN_BACK_TIMER,
1278 WLAN_REASON_QSTA_TIMEOUT);
1279}
1280
1281
f0706e82
JB		 1282static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1283 struct ieee80211_if_sta *ifsta,
1284 struct ieee80211_mgmt *mgmt,
1285 size_t len)
1286{
1287 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1288 u16 auth_alg, auth_transaction, status_code;
0795af57 1289 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1290
1291 if (ifsta->state != IEEE80211_AUTHENTICATE &&
1292 sdata->type != IEEE80211_IF_TYPE_IBSS) {
1293 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1294 "%s, but not in authenticate state - ignored\n",
1295 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1296 return;
1297 }
1298
1299 if (len < 24 + 6) {
1300 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1301 "received from %s - ignored\n",
1302 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1303 return;
1304 }
1305
1306 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1307 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1308 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1309 "unknown AP (SA=%s BSSID=%s) - "
1310 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1311 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1312 return;
1313 }
1314
1315 if (sdata->type != IEEE80211_IF_TYPE_IBSS &&
1316 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1317 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1318 "unknown BSSID (SA=%s BSSID=%s) - "
1319 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1320 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1321 return;
1322 }
1323
1324 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1325 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1326 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1327
0795af57 1328 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1329 "transaction=%d status=%d)\n",
0795af57 1330 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1331 auth_transaction, status_code);
1332
1333 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
1334 /* IEEE 802.11 standard does not require authentication in IBSS
1335 * networks and most implementations do not seem to use it.
1336 * However, try to reply to authentication attempts if someone
1337 * has actually implemented this.
1338 * TODO: Could implement shared key authentication. */
1339 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1340 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1341 "frame (alg=%d transaction=%d)\n",
1342 dev->name, auth_alg, auth_transaction);
1343 return;
1344 }
1345 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1346 }
1347
1348 if (auth_alg != ifsta->auth_alg ||
1349 auth_transaction != ifsta->auth_transaction) {
1350 printk(KERN_DEBUG "%s: unexpected authentication frame "
1351 "(alg=%d transaction=%d)\n",
1352 dev->name, auth_alg, auth_transaction);
1353 return;
1354 }
1355
1356 if (status_code != WLAN_STATUS_SUCCESS) {
1357 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1358 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1359 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1360 u8 algs[3];
1361 const int num_algs = ARRAY_SIZE(algs);
1362 int i, pos;
1363 algs[0] = algs[1] = algs[2] = 0xff;
1364 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1365 algs[0] = WLAN_AUTH_OPEN;
1366 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1367 algs[1] = WLAN_AUTH_SHARED_KEY;
1368 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1369 algs[2] = WLAN_AUTH_LEAP;
1370 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1371 pos = 0;
1372 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1373 pos = 1;
1374 else
1375 pos = 2;
1376 for (i = 0; i < num_algs; i++) {
1377 pos++;
1378 if (pos >= num_algs)
1379 pos = 0;
1380 if (algs[pos] == ifsta->auth_alg ||
1381 algs[pos] == 0xff)
1382 continue;
1383 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1384 !ieee80211_sta_wep_configured(dev))
1385 continue;
1386 ifsta->auth_alg = algs[pos];
1387 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1388 "next try\n",
1389 dev->name, ifsta->auth_alg);
1390 break;
1391 }
1392 }
1393 return;
1394 }
1395
1396 switch (ifsta->auth_alg) {
1397 case WLAN_AUTH_OPEN:
1398 case WLAN_AUTH_LEAP:
1399 ieee80211_auth_completed(dev, ifsta);
1400 break;
1401 case WLAN_AUTH_SHARED_KEY:
1402 if (ifsta->auth_transaction == 4)
1403 ieee80211_auth_completed(dev, ifsta);
1404 else
1405 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1406 break;
1407 }
1408}
1409
1410
1411static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1412 struct ieee80211_if_sta *ifsta,
1413 struct ieee80211_mgmt *mgmt,
1414 size_t len)
1415{
1416 u16 reason_code;
0795af57 1417 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1418
1419 if (len < 24 + 2) {
1420 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1421 "received from %s - ignored\n",
1422 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1423 return;
1424 }
1425
1426 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1427 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1428 "unknown AP (SA=%s BSSID=%s) - "
1429 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1430 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1431 return;
1432 }
1433
1434 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1435
0795af57 1436 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1437 " (reason=%d)\n",
0795af57 1438 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1439
d6f2da5b 1440 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1441 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1442 }
1443
1444 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1445 ifsta->state == IEEE80211_ASSOCIATE ||
1446 ifsta->state == IEEE80211_ASSOCIATED) {
1447 ifsta->state = IEEE80211_AUTHENTICATE;
1448 mod_timer(&ifsta->timer, jiffies +
1449 IEEE80211_RETRY_AUTH_INTERVAL);
1450 }
1451
1452 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1453 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1454}
1455
1456
1457static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1458 struct ieee80211_if_sta *ifsta,
1459 struct ieee80211_mgmt *mgmt,
1460 size_t len)
1461{
1462 u16 reason_code;
0795af57 1463 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1464
1465 if (len < 24 + 2) {
1466 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1467 "received from %s - ignored\n",
1468 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1469 return;
1470 }
1471
1472 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1473 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1474 "unknown AP (SA=%s BSSID=%s) - "
1475 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1476 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1477 return;
1478 }
1479
1480 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1481
0795af57 1482 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1483 " (reason=%d)\n",
0795af57 1484 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1485
d6f2da5b 1486 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1487 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1488
1489 if (ifsta->state == IEEE80211_ASSOCIATED) {
1490 ifsta->state = IEEE80211_ASSOCIATE;
1491 mod_timer(&ifsta->timer, jiffies +
1492 IEEE80211_RETRY_AUTH_INTERVAL);
1493 }
1494
1495 ieee80211_set_disassoc(dev, ifsta, 0);
1496}
1497
1498
1499static void ieee80211_rx_mgmt_assoc_resp(struct net_device *dev,
1500 struct ieee80211_if_sta *ifsta,
1501 struct ieee80211_mgmt *mgmt,
1502 size_t len,
1503 int reassoc)
1504{
1505 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1506 struct ieee80211_hw_mode *mode;
1507 struct sta_info *sta;
1508 u32 rates;
1509 u16 capab_info, status_code, aid;
1510 struct ieee802_11_elems elems;
1511 u8 *pos;
1512 int i, j;
0795af57 1513 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1514
1515 /* AssocResp and ReassocResp have identical structure, so process both
1516 * of them in this function. */
1517
1518 if (ifsta->state != IEEE80211_ASSOCIATE) {
1519 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1520 "%s, but not in associate state - ignored\n",
1521 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1522 return;
1523 }
1524
1525 if (len < 24 + 6) {
1526 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1527 "received from %s - ignored\n",
1528 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1529 return;
1530 }
1531
1532 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1533 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1534 "unknown AP (SA=%s BSSID=%s) - "
1535 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1536 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1537 return;
1538 }
1539
1540 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1541 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1542 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1543
0795af57 1544 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1545 "status=%d aid=%d)\n",
0795af57 1546 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1547 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1548
1549 if (status_code != WLAN_STATUS_SUCCESS) {
1550 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1551 dev->name, status_code);
8a69aa93
DD		 1552 /* if this was a reassociation, ensure we try a "full"
1553 * association next time. This works around some broken APs
1554 * which do not correctly reject reassociation requests. */
d6f2da5b 1555 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1556 return;
1557 }
1558
1dd84aa2
JB		 1559 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1560 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1561 "set\n", dev->name, aid);
1562 aid &= ~(BIT(15) | BIT(14));
1563
f0706e82 1564 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1565 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1566
1567 if (!elems.supp_rates) {
1568 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1569 dev->name);
1570 return;
1571 }
1572
1573 printk(KERN_DEBUG "%s: associated\n", dev->name);
1574 ifsta->aid = aid;
1575 ifsta->ap_capab = capab_info;
1576
1577 kfree(ifsta->assocresp_ies);
1578 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1579 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1580 if (ifsta->assocresp_ies)
1581 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1582
1583 ieee80211_set_associated(dev, ifsta, 1);
1584
1585 /* Add STA entry for the AP */
1586 sta = sta_info_get(local, ifsta->bssid);
1587 if (!sta) {
1588 struct ieee80211_sta_bss *bss;
0ec0b7ac 1589 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1590 if (!sta) {
1591 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1592 " AP\n", dev->name);
1593 return;
1594 }
65c107ab 1595 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1596 local->hw.conf.channel,
1597 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1598 if (bss) {
1599 sta->last_rssi = bss->rssi;
1600 sta->last_signal = bss->signal;
1601 sta->last_noise = bss->noise;
1602 ieee80211_rx_bss_put(dev, bss);
1603 }
1604 }
1605
1606 sta->dev = dev;
c9ee23df 1607 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1608
1609 rates = 0;
1610 mode = local->oper_hw_mode;
1611 for (i = 0; i < elems.supp_rates_len; i++) {
1612 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1613 for (j = 0; j < mode->num_rates; j++)
1614 if (mode->rates[j].rate == rate)
1615 rates |= BIT(j);
1616 }
1617 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1618 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1619 for (j = 0; j < mode->num_rates; j++)
1620 if (mode->rates[j].rate == rate)
1621 rates |= BIT(j);
1622 }
1623 sta->supp_rates = rates;
1624
d3c990fb
RR		 1625 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1626 local->ops->conf_ht) {
1627 struct ieee80211_ht_bss_info bss_info;
1628
1629 ieee80211_ht_cap_ie_to_ht_info(
1630 (struct ieee80211_ht_cap *)
1631 elems.ht_cap_elem, &sta->ht_info);
1632 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1633 (struct ieee80211_ht_addt_info *)
1634 elems.ht_info_elem, &bss_info);
1635 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1636 }
1637
f0706e82
JB		 1638 rate_control_rate_init(sta, local);
1639
d6f2da5b 1640 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1641 sta->flags |= WLAN_STA_WME;
1642 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1643 elems.wmm_param_len);
1644 }
1645
1646
1647 sta_info_put(sta);
1648
1649 ieee80211_associated(dev, ifsta);
1650}
1651
1652
1653/* Caller must hold local->sta_bss_lock */
1654static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1655 struct ieee80211_sta_bss *bss)
1656{
1657 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1658 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1659 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1660}
1661
1662
1663/* Caller must hold local->sta_bss_lock */
1664static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1665 struct ieee80211_sta_bss *bss)
1666{
1667 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1668 struct ieee80211_sta_bss *b, *prev = NULL;
1669 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1670 while (b) {
1671 if (b == bss) {
1672 if (!prev)
1673 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1674 bss->hnext;
1675 else
1676 prev->hnext = bss->hnext;
1677 break;
1678 }
1679 prev = b;
1680 b = b->hnext;
1681 }
1682}
1683
1684
1685static struct ieee80211_sta_bss *
cffdd30d
JL		 1686ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1687 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1688{
1689 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1690 struct ieee80211_sta_bss *bss;
1691
dd00cc48 1692 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1693 if (!bss)
1694 return NULL;
f0706e82
JB		 1695 atomic_inc(&bss->users);
1696 atomic_inc(&bss->users);
1697 memcpy(bss->bssid, bssid, ETH_ALEN);
65c107ab 1698 bss->channel = channel;
cffdd30d
JL		 1699 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1700 memcpy(bss->ssid, ssid, ssid_len);
1701 bss->ssid_len = ssid_len;
1702 }
f0706e82
JB		 1703
1704 spin_lock_bh(&local->sta_bss_lock);
1705 /* TODO: order by RSSI? */
1706 list_add_tail(&bss->list, &local->sta_bss_list);
1707 __ieee80211_rx_bss_hash_add(dev, bss);
1708 spin_unlock_bh(&local->sta_bss_lock);
1709 return bss;
1710}
1711
1712
1713static struct ieee80211_sta_bss *
cffdd30d
JL		 1714ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1715 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1716{
1717 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1718 struct ieee80211_sta_bss *bss;
1719
1720 spin_lock_bh(&local->sta_bss_lock);
1721 bss = local->sta_bss_hash[STA_HASH(bssid)];
1722 while (bss) {
cffdd30d
JL		 1723 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1724 bss->channel == channel &&
1725 bss->ssid_len == ssid_len &&
1726 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 1727 atomic_inc(&bss->users);
1728 break;
1729 }
1730 bss = bss->hnext;
1731 }
1732 spin_unlock_bh(&local->sta_bss_lock);
1733 return bss;
1734}
1735
1736
1737static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1738{
1739 kfree(bss->wpa_ie);
1740 kfree(bss->rsn_ie);
1741 kfree(bss->wmm_ie);
c7153508 1742 kfree(bss->ht_ie);
f0706e82
JB		 1743 kfree(bss);
1744}
1745
1746
1747static void ieee80211_rx_bss_put(struct net_device *dev,
1748 struct ieee80211_sta_bss *bss)
1749{
1750 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1751 if (!atomic_dec_and_test(&bss->users))
1752 return;
1753
1754 spin_lock_bh(&local->sta_bss_lock);
1755 __ieee80211_rx_bss_hash_del(dev, bss);
1756 list_del(&bss->list);
1757 spin_unlock_bh(&local->sta_bss_lock);
1758 ieee80211_rx_bss_free(bss);
1759}
1760
1761
1762void ieee80211_rx_bss_list_init(struct net_device *dev)
1763{
1764 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1765 spin_lock_init(&local->sta_bss_lock);
1766 INIT_LIST_HEAD(&local->sta_bss_list);
1767}
1768
1769
1770void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1771{
1772 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1773 struct ieee80211_sta_bss *bss, *tmp;
1774
1775 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1776 ieee80211_rx_bss_put(dev, bss);
1777}
1778
1779
1780static void ieee80211_rx_bss_info(struct net_device *dev,
1781 struct ieee80211_mgmt *mgmt,
1782 size_t len,
1783 struct ieee80211_rx_status *rx_status,
1784 int beacon)
1785{
1786 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1787 struct ieee802_11_elems elems;
1788 size_t baselen;
67a4cce4 1789 int channel, clen;
f0706e82
JB		 1790 struct ieee80211_sta_bss *bss;
1791 struct sta_info *sta;
1792 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1793 u64 timestamp;
0795af57
JP		 1794 DECLARE_MAC_BUF(mac);
1795 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 1796
1797 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
1798 return; /* ignore ProbeResp to foreign address */
1799
1800#if 0
0795af57 1801 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 1802 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 1803 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 1804#endif
1805
1806 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1807 if (baselen > len)
1808 return;
1809
1810 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1811
1812 if (sdata->type == IEEE80211_IF_TYPE_IBSS && beacon &&
1813 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
1814#ifdef CONFIG_MAC80211_IBSS_DEBUG
1815 static unsigned long last_tsf_debug = 0;
1816 u64 tsf;
1817 if (local->ops->get_tsf)
1818 tsf = local->ops->get_tsf(local_to_hw(local));
1819 else
1820 tsf = -1LLU;
1821 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 1822 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
1823 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 1824 "@%lu\n",
0795af57 1825 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 1826 (unsigned long long)tsf,
1827 (unsigned long long)timestamp,
1828 (unsigned long long)(tsf - timestamp),
1829 jiffies);
1830 last_tsf_debug = jiffies;
1831 }
1832#endif /* CONFIG_MAC80211_IBSS_DEBUG */
1833 }
1834
67a4cce4 1835 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82
JB		 1836
1837 if (sdata->type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
1838 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
1839 (sta = sta_info_get(local, mgmt->sa))) {
1840 struct ieee80211_hw_mode *mode;
1841 struct ieee80211_rate *rates;
1842 size_t num_rates;
1843 u32 supp_rates, prev_rates;
1844 int i, j;
1845
ece8eddd 1846 mode = local->sta_sw_scanning ?
f0706e82 1847 local->scan_hw_mode : local->oper_hw_mode;
ece8eddd
ZY		 1848
1849 if (local->sta_hw_scanning) {
1850 /* search for the correct mode matches the beacon */
1851 list_for_each_entry(mode, &local->modes_list, list)
1852 if (mode->mode == rx_status->phymode)
1853 break;
1854
1855 if (mode == NULL)
1856 mode = local->oper_hw_mode;
1857 }
f0706e82
JB		 1858 rates = mode->rates;
1859 num_rates = mode->num_rates;
1860
1861 supp_rates = 0;
1862 for (i = 0; i < elems.supp_rates_len +
1863 elems.ext_supp_rates_len; i++) {
1864 u8 rate = 0;
1865 int own_rate;
1866 if (i < elems.supp_rates_len)
1867 rate = elems.supp_rates[i];
1868 else if (elems.ext_supp_rates)
1869 rate = elems.ext_supp_rates
1870 [i - elems.supp_rates_len];
1871 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 1872 for (j = 0; j < num_rates; j++)
1873 if (rates[j].rate == own_rate)
1874 supp_rates |= BIT(j);
1875 }
1876
1877 prev_rates = sta->supp_rates;
1878 sta->supp_rates &= supp_rates;
1879 if (sta->supp_rates == 0) {
1880 /* No matching rates - this should not really happen.
1881 * Make sure that at least one rate is marked
1882 * supported to avoid issues with TX rate ctrl. */
1883 sta->supp_rates = sdata->u.sta.supp_rates_bits;
1884 }
1885 if (sta->supp_rates != prev_rates) {
1886 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 1887 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 1888 "0x%x)\n",
0795af57 1889 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 1890 supp_rates, sta->supp_rates);
1891 }
1892 sta_info_put(sta);
1893 }
1894
1895 if (!elems.ssid)
1896 return;
1897
1898 if (elems.ds_params && elems.ds_params_len == 1)
1899 channel = elems.ds_params[0];
1900 else
1901 channel = rx_status->channel;
1902
cffdd30d
JL		 1903 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
1904 elems.ssid, elems.ssid_len);
f0706e82 1905 if (!bss) {
cffdd30d
JL		 1906 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
1907 elems.ssid, elems.ssid_len);
f0706e82
JB		 1908 if (!bss)
1909 return;
1910 } else {
1911#if 0
1912 /* TODO: order by RSSI? */
1913 spin_lock_bh(&local->sta_bss_lock);
1914 list_move_tail(&bss->list, &local->sta_bss_list);
1915 spin_unlock_bh(&local->sta_bss_lock);
1916#endif
1917 }
1918
1919 if (bss->probe_resp && beacon) {
1920 /* Do not allow beacon to override data from Probe Response. */
1921 ieee80211_rx_bss_put(dev, bss);
1922 return;
1923 }
1924
5628221c
DD		 1925 /* save the ERP value so that it is available at association time */
1926 if (elems.erp_info && elems.erp_info_len >= 1) {
1927 bss->erp_value = elems.erp_info[0];
1928 bss->has_erp_value = 1;
1929 }
1930
f0706e82
JB		 1931 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
1932 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 1933
1934 bss->supp_rates_len = 0;
1935 if (elems.supp_rates) {
1936 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1937 if (clen > elems.supp_rates_len)
1938 clen = elems.supp_rates_len;
1939 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
1940 clen);
1941 bss->supp_rates_len += clen;
1942 }
1943 if (elems.ext_supp_rates) {
1944 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1945 if (clen > elems.ext_supp_rates_len)
1946 clen = elems.ext_supp_rates_len;
1947 memcpy(&bss->supp_rates[bss->supp_rates_len],
1948 elems.ext_supp_rates, clen);
1949 bss->supp_rates_len += clen;
1950 }
1951
1952 if (elems.wpa &&
1953 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
1954 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
1955 kfree(bss->wpa_ie);
1956 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
1957 if (bss->wpa_ie) {
1958 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
1959 bss->wpa_ie_len = elems.wpa_len + 2;
1960 } else
1961 bss->wpa_ie_len = 0;
1962 } else if (!elems.wpa && bss->wpa_ie) {
1963 kfree(bss->wpa_ie);
1964 bss->wpa_ie = NULL;
1965 bss->wpa_ie_len = 0;
1966 }
1967
1968 if (elems.rsn &&
1969 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
1970 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
1971 kfree(bss->rsn_ie);
1972 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
1973 if (bss->rsn_ie) {
1974 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
1975 bss->rsn_ie_len = elems.rsn_len + 2;
1976 } else
1977 bss->rsn_ie_len = 0;
1978 } else if (!elems.rsn && bss->rsn_ie) {
1979 kfree(bss->rsn_ie);
1980 bss->rsn_ie = NULL;
1981 bss->rsn_ie_len = 0;
1982 }
1983
1984 if (elems.wmm_param &&
1985 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
1986 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
1987 kfree(bss->wmm_ie);
1988 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
1989 if (bss->wmm_ie) {
1990 memcpy(bss->wmm_ie, elems.wmm_param - 2,
1991 elems.wmm_param_len + 2);
1992 bss->wmm_ie_len = elems.wmm_param_len + 2;
1993 } else
1994 bss->wmm_ie_len = 0;
1995 } else if (!elems.wmm_param && bss->wmm_ie) {
1996 kfree(bss->wmm_ie);
1997 bss->wmm_ie = NULL;
1998 bss->wmm_ie_len = 0;
1999 }
c7153508
RR		 2000 if (elems.ht_cap_elem &&
2001 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2002 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2003 kfree(bss->ht_ie);
2004 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2005 if (bss->ht_ie) {
2006 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2007 elems.ht_cap_elem_len + 2);
2008 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2009 } else
2010 bss->ht_ie_len = 0;
2011 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2012 kfree(bss->ht_ie);
2013 bss->ht_ie = NULL;
2014 bss->ht_ie_len = 0;
2015 }
f0706e82
JB		 2016
2017 bss->hw_mode = rx_status->phymode;
f0706e82
JB		 2018 bss->freq = rx_status->freq;
2019 if (channel != rx_status->channel &&
2020 (bss->hw_mode == MODE_IEEE80211G ||
2021 bss->hw_mode == MODE_IEEE80211B) &&
2022 channel >= 1 && channel <= 14) {
2023 static const int freq_list[] = {
2024 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2025 2447, 2452, 2457, 2462, 2467, 2472, 2484
2026 };
2027 /* IEEE 802.11g/b mode can receive packets from neighboring
2028 * channels, so map the channel into frequency. */
2029 bss->freq = freq_list[channel - 1];
2030 }
2031 bss->timestamp = timestamp;
2032 bss->last_update = jiffies;
2033 bss->rssi = rx_status->ssi;
2034 bss->signal = rx_status->signal;
2035 bss->noise = rx_status->noise;
2036 if (!beacon)
2037 bss->probe_resp++;
2038 ieee80211_rx_bss_put(dev, bss);
2039}
2040
2041
2042static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2043 struct ieee80211_mgmt *mgmt,
2044 size_t len,
2045 struct ieee80211_rx_status *rx_status)
2046{
2047 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2048}
2049
2050
2051static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2052 struct ieee80211_mgmt *mgmt,
2053 size_t len,
2054 struct ieee80211_rx_status *rx_status)
2055{
f0706e82
JB		 2056 struct ieee80211_sub_if_data *sdata;
2057 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2058 size_t baselen;
2059 struct ieee802_11_elems elems;
d3c990fb
RR		 2060 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2061 struct ieee80211_conf *conf = &local->hw.conf;
f0706e82
JB		 2062
2063 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2064
2065 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2066 if (sdata->type != IEEE80211_IF_TYPE_STA)
2067 return;
2068 ifsta = &sdata->u.sta;
2069
d6f2da5b 2070 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2071 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2072 return;
2073
2074 /* Process beacon from the current BSS */
2075 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2076 if (baselen > len)
2077 return;
2078
67a4cce4 2079 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2080
5628221c
DD		 2081 if (elems.erp_info && elems.erp_info_len >= 1)
2082 ieee80211_handle_erp_ie(dev, elems.erp_info[0]);
f0706e82 2083
d3c990fb
RR		 2084 if (elems.ht_cap_elem && elems.ht_info_elem &&
2085 elems.wmm_param && local->ops->conf_ht &&
2086 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2087 struct ieee80211_ht_bss_info bss_info;
2088
2089 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2090 (struct ieee80211_ht_addt_info *)
2091 elems.ht_info_elem, &bss_info);
2092 /* check if AP changed bss inforamation */
2093 if ((conf->ht_bss_conf.primary_channel !=
2094 bss_info.primary_channel) ||
2095 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2096 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2097 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2098 &bss_info);
2099 }
2100
d6f2da5b 2101 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2102 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2103 elems.wmm_param_len);
2104 }
2105}
2106
2107
2108static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2109 struct ieee80211_if_sta *ifsta,
2110 struct ieee80211_mgmt *mgmt,
2111 size_t len,
2112 struct ieee80211_rx_status *rx_status)
2113{
2114 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2115 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2116 int tx_last_beacon;
2117 struct sk_buff *skb;
2118 struct ieee80211_mgmt *resp;
2119 u8 *pos, *end;
0795af57
JP		 2120 DECLARE_MAC_BUF(mac);
2121#ifdef CONFIG_MAC80211_IBSS_DEBUG
2122 DECLARE_MAC_BUF(mac2);
2123 DECLARE_MAC_BUF(mac3);
2124#endif
f0706e82
JB		 2125
2126 if (sdata->type != IEEE80211_IF_TYPE_IBSS ||
2127 ifsta->state != IEEE80211_IBSS_JOINED ||
2128 len < 24 + 2 || !ifsta->probe_resp)
2129 return;
2130
2131 if (local->ops->tx_last_beacon)
2132 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2133 else
2134 tx_last_beacon = 1;
2135
2136#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2137 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2138 "%s (tx_last_beacon=%d)\n",
2139 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2140 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2141#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2142
2143 if (!tx_last_beacon)
2144 return;
2145
2146 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2147 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2148 return;
2149
2150 end = ((u8 *) mgmt) + len;
2151 pos = mgmt->u.probe_req.variable;
2152 if (pos[0] != WLAN_EID_SSID ||
2153 pos + 2 + pos[1] > end) {
2154 if (net_ratelimit()) {
2155 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2156 "from %s\n",
2157 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2158 }
2159 return;
2160 }
2161 if (pos[1] != 0 &&
2162 (pos[1] != ifsta->ssid_len ||
2163 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2164 /* Ignore ProbeReq for foreign SSID */
2165 return;
2166 }
2167
2168 /* Reply with ProbeResp */
0ec0b7ac 2169 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2170 if (!skb)
2171 return;
2172
2173 resp = (struct ieee80211_mgmt *) skb->data;
2174 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2175#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2176 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2177 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2178#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2179 ieee80211_sta_tx(dev, skb, 0);
2180}
2181
4e20cb29
JB		 2182static void ieee80211_rx_mgmt_action(struct net_device *dev,
2183 struct ieee80211_if_sta *ifsta,
2184 struct ieee80211_mgmt *mgmt,
2185 size_t len)
9f985b0e
RR		 2186{
2187 if (len < IEEE80211_MIN_ACTION_SIZE)
2188 return;
2189
2190 switch (mgmt->u.action.category) {
2191 case WLAN_CATEGORY_BACK:
2192 switch (mgmt->u.action.u.addba_req.action_code) {
2193 case WLAN_ACTION_ADDBA_REQ:
2194 if (len < (IEEE80211_MIN_ACTION_SIZE +
2195 sizeof(mgmt->u.action.u.addba_req)))
2196 break;
2197 ieee80211_sta_process_addba_request(dev, mgmt, len);
2198 break;
2199 default:
2200 if (net_ratelimit())
2201 printk(KERN_DEBUG "%s: received unsupported BACK\n",
2202 dev->name);
2203 break;
2204 }
2205 break;
2206 default:
2207 break;
2208 }
2209}
f0706e82
JB		 2210
2211void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2212 struct ieee80211_rx_status *rx_status)
2213{
2214 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2215 struct ieee80211_sub_if_data *sdata;
2216 struct ieee80211_if_sta *ifsta;
2217 struct ieee80211_mgmt *mgmt;
2218 u16 fc;
2219
2220 if (skb->len < 24)
2221 goto fail;
2222
2223 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2224 ifsta = &sdata->u.sta;
2225
2226 mgmt = (struct ieee80211_mgmt *) skb->data;
2227 fc = le16_to_cpu(mgmt->frame_control);
2228
2229 switch (fc & IEEE80211_FCTL_STYPE) {
2230 case IEEE80211_STYPE_PROBE_REQ:
2231 case IEEE80211_STYPE_PROBE_RESP:
2232 case IEEE80211_STYPE_BEACON:
2233 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2234 case IEEE80211_STYPE_AUTH:
2235 case IEEE80211_STYPE_ASSOC_RESP:
2236 case IEEE80211_STYPE_REASSOC_RESP:
2237 case IEEE80211_STYPE_DEAUTH:
2238 case IEEE80211_STYPE_DISASSOC:
9f985b0e 2239 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2240 skb_queue_tail(&ifsta->skb_queue, skb);
2241 queue_work(local->hw.workqueue, &ifsta->work);
2242 return;
2243 default:
2244 printk(KERN_DEBUG "%s: received unknown management frame - "
2245 "stype=%d\n", dev->name,
2246 (fc & IEEE80211_FCTL_STYPE) >> 4);
2247 break;
2248 }
2249
2250 fail:
2251 kfree_skb(skb);
2252}
2253
2254
2255static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2256 struct sk_buff *skb)
2257{
2258 struct ieee80211_rx_status *rx_status;
2259 struct ieee80211_sub_if_data *sdata;
2260 struct ieee80211_if_sta *ifsta;
2261 struct ieee80211_mgmt *mgmt;
2262 u16 fc;
2263
2264 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2265 ifsta = &sdata->u.sta;
2266
2267 rx_status = (struct ieee80211_rx_status *) skb->cb;
2268 mgmt = (struct ieee80211_mgmt *) skb->data;
2269 fc = le16_to_cpu(mgmt->frame_control);
2270
2271 switch (fc & IEEE80211_FCTL_STYPE) {
2272 case IEEE80211_STYPE_PROBE_REQ:
2273 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2274 rx_status);
2275 break;
2276 case IEEE80211_STYPE_PROBE_RESP:
2277 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2278 break;
2279 case IEEE80211_STYPE_BEACON:
2280 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2281 break;
2282 case IEEE80211_STYPE_AUTH:
2283 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2284 break;
2285 case IEEE80211_STYPE_ASSOC_RESP:
2286 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 0);
2287 break;
2288 case IEEE80211_STYPE_REASSOC_RESP:
2289 ieee80211_rx_mgmt_assoc_resp(dev, ifsta, mgmt, skb->len, 1);
2290 break;
2291 case IEEE80211_STYPE_DEAUTH:
2292 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2293 break;
2294 case IEEE80211_STYPE_DISASSOC:
2295 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2296 break;
9f985b0e
RR		 2297 case IEEE80211_STYPE_ACTION:
2298 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2299 break;
f0706e82
JB		 2300 }
2301
2302 kfree_skb(skb);
2303}
2304
2305
ece8eddd
ZY		 2306ieee80211_txrx_result
2307ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2308 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2309{
2310 struct ieee80211_mgmt *mgmt;
2311 u16 fc;
2312
ece8eddd
ZY		 2313 if (skb->len < 2)
2314 return TXRX_DROP;
f0706e82
JB		 2315
2316 mgmt = (struct ieee80211_mgmt *) skb->data;
2317 fc = le16_to_cpu(mgmt->frame_control);
2318
ece8eddd
ZY		 2319 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2320 return TXRX_CONTINUE;
2321
2322 if (skb->len < 24)
2323 return TXRX_DROP;
2324
f0706e82
JB		 2325 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2326 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2327 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2328 skb->len, rx_status);
ece8eddd
ZY		 2329 dev_kfree_skb(skb);
2330 return TXRX_QUEUED;
f0706e82
JB		 2331 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2332 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2333 rx_status);
ece8eddd
ZY		 2334 dev_kfree_skb(skb);
2335 return TXRX_QUEUED;
f0706e82
JB		 2336 }
2337 }
ece8eddd 2338 return TXRX_CONTINUE;
f0706e82
JB		 2339}
2340
2341
2342static int ieee80211_sta_active_ibss(struct net_device *dev)
2343{
2344 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2345 int active = 0;
2346 struct sta_info *sta;
2347
be8755e1 2348 read_lock_bh(&local->sta_lock);
f0706e82
JB		 2349 list_for_each_entry(sta, &local->sta_list, list) {
2350 if (sta->dev == dev &&
2351 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2352 jiffies)) {
2353 active++;
2354 break;
2355 }
2356 }
be8755e1 2357 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 2358
2359 return active;
2360}
2361
2362
2363static void ieee80211_sta_expire(struct net_device *dev)
2364{
2365 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2366 struct sta_info *sta, *tmp;
be8755e1 2367 LIST_HEAD(tmp_list);
0795af57 2368 DECLARE_MAC_BUF(mac);
f0706e82 2369
be8755e1 2370 write_lock_bh(&local->sta_lock);
f0706e82
JB		 2371 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2372 if (time_after(jiffies, sta->last_rx +
2373 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 2374 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2375 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 2376 __sta_info_get(sta);
2377 sta_info_remove(sta);
2378 list_add(&sta->list, &tmp_list);
f0706e82 2379 }
be8755e1
MW		 2380 write_unlock_bh(&local->sta_lock);
2381
2382 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2383 sta_info_free(sta);
2384 sta_info_put(sta);
2385 }
f0706e82
JB		 2386}
2387
2388
2389static void ieee80211_sta_merge_ibss(struct net_device *dev,
2390 struct ieee80211_if_sta *ifsta)
2391{
2392 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2393
2394 ieee80211_sta_expire(dev);
2395 if (ieee80211_sta_active_ibss(dev))
2396 return;
2397
2398 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2399 "IBSS networks with same SSID (merge)\n", dev->name);
2400 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2401}
2402
2403
2404void ieee80211_sta_timer(unsigned long data)
2405{
2406 struct ieee80211_sub_if_data *sdata =
2407 (struct ieee80211_sub_if_data *) data;
2408 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2409 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2410
2411 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2412 queue_work(local->hw.workqueue, &ifsta->work);
2413}
2414
2415
2416void ieee80211_sta_work(struct work_struct *work)
2417{
2418 struct ieee80211_sub_if_data *sdata =
2419 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2420 struct net_device *dev = sdata->dev;
2421 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2422 struct ieee80211_if_sta *ifsta;
2423 struct sk_buff *skb;
2424
2425 if (!netif_running(dev))
2426 return;
2427
ece8eddd 2428 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 2429 return;
2430
2431 if (sdata->type != IEEE80211_IF_TYPE_STA &&
2432 sdata->type != IEEE80211_IF_TYPE_IBSS) {
2433 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
2434 "(type=%d)\n", dev->name, sdata->type);
2435 return;
2436 }
2437 ifsta = &sdata->u.sta;
2438
2439 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2440 ieee80211_sta_rx_queued_mgmt(dev, skb);
2441
2442 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2443 ifsta->state != IEEE80211_ASSOCIATE &&
2444 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 2445 if (ifsta->scan_ssid_len)
2446 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2447 else
2448 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 2449 return;
2450 }
2451
2452 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2453 if (ieee80211_sta_config_auth(dev, ifsta))
2454 return;
2455 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2456 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2457 return;
2458
2459 switch (ifsta->state) {
2460 case IEEE80211_DISABLED:
2461 break;
2462 case IEEE80211_AUTHENTICATE:
2463 ieee80211_authenticate(dev, ifsta);
2464 break;
2465 case IEEE80211_ASSOCIATE:
2466 ieee80211_associate(dev, ifsta);
2467 break;
2468 case IEEE80211_ASSOCIATED:
2469 ieee80211_associated(dev, ifsta);
2470 break;
2471 case IEEE80211_IBSS_SEARCH:
2472 ieee80211_sta_find_ibss(dev, ifsta);
2473 break;
2474 case IEEE80211_IBSS_JOINED:
2475 ieee80211_sta_merge_ibss(dev, ifsta);
2476 break;
2477 default:
2478 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2479 ifsta->state);
2480 break;
2481 }
2482
2483 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2484 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2485 "mixed-cell disabled - disassociate\n", dev->name);
2486
2487 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2488 ieee80211_set_disassoc(dev, ifsta, 0);
2489 }
2490}
2491
2492
2493static void ieee80211_sta_reset_auth(struct net_device *dev,
2494 struct ieee80211_if_sta *ifsta)
2495{
2496 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2497
2498 if (local->ops->reset_tsf) {
2499 /* Reset own TSF to allow time synchronization work. */
2500 local->ops->reset_tsf(local_to_hw(local));
2501 }
2502
2503 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2504
2505
2506 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2507 ifsta->auth_alg = WLAN_AUTH_OPEN;
2508 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2509 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2510 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2511 ifsta->auth_alg = WLAN_AUTH_LEAP;
2512 else
2513 ifsta->auth_alg = WLAN_AUTH_OPEN;
2514 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2515 ifsta->auth_alg);
2516 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2517 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2518 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2519 netif_carrier_off(dev);
2520}
2521
2522
2523void ieee80211_sta_req_auth(struct net_device *dev,
2524 struct ieee80211_if_sta *ifsta)
2525{
2526 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2527 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2528
2529 if (sdata->type != IEEE80211_IF_TYPE_STA)
2530 return;
2531
d6f2da5b
JS		 2532 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2533 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2534 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2535 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2536 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2537 queue_work(local->hw.workqueue, &ifsta->work);
2538 }
2539}
2540
2541static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2542 const char *ssid, int ssid_len)
2543{
2544 int tmp, hidden_ssid;
2545
48225709
MW		 2546 if (ssid_len == ifsta->ssid_len &&
2547 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2548 return 1;
2549
d6f2da5b 2550 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2551 return 0;
2552
2553 hidden_ssid = 1;
2554 tmp = ssid_len;
2555 while (tmp--) {
2556 if (ssid[tmp] != '\0') {
2557 hidden_ssid = 0;
2558 break;
2559 }
2560 }
2561
2562 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2563 return 1;
2564
2565 if (ssid_len == 1 && ssid[0] == ' ')
2566 return 1;
2567
2568 return 0;
2569}
2570
2571static int ieee80211_sta_config_auth(struct net_device *dev,
2572 struct ieee80211_if_sta *ifsta)
2573{
2574 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2575 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2576 struct ieee80211_sta_bss *bss, *selected = NULL;
2577 int top_rssi = 0, freq;
2578
d6f2da5b
JS		 2579 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2580 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2581 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2582 ieee80211_sta_reset_auth(dev, ifsta);
2583 return 0;
2584 }
2585
2586 spin_lock_bh(&local->sta_bss_lock);
2587 freq = local->oper_channel->freq;
2588 list_for_each_entry(bss, &local->sta_bss_list, list) {
2589 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2590 continue;
2591
2592 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2593 !!sdata->default_key)
2594 continue;
2595
d6f2da5b
JS		 2596 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2597 bss->freq != freq)
f0706e82
JB		 2598 continue;
2599
d6f2da5b 2600 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2601 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2602 continue;
2603
d6f2da5b 2604 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2605 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2606 continue;
2607
2608 if (!selected || top_rssi < bss->rssi) {
2609 selected = bss;
2610 top_rssi = bss->rssi;
2611 }
2612 }
2613 if (selected)
2614 atomic_inc(&selected->users);
2615 spin_unlock_bh(&local->sta_bss_lock);
2616
2617 if (selected) {
2618 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2619 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2620 ieee80211_sta_set_ssid(dev, selected->ssid,
2621 selected->ssid_len);
2622 ieee80211_sta_set_bssid(dev, selected->bssid);
2623 ieee80211_rx_bss_put(dev, selected);
2624 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2625 ieee80211_sta_reset_auth(dev, ifsta);
2626 return 0;
2627 } else {
2628 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2629 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2630 ieee80211_sta_start_scan(dev, NULL, 0);
2631 else
2632 ieee80211_sta_start_scan(dev, ifsta->ssid,
2633 ifsta->ssid_len);
f0706e82
JB		 2634 ifsta->state = IEEE80211_AUTHENTICATE;
2635 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2636 } else
2637 ifsta->state = IEEE80211_DISABLED;
2638 }
f0706e82
JB		 2639 return -1;
2640}
2641
2642static int ieee80211_sta_join_ibss(struct net_device *dev,
2643 struct ieee80211_if_sta *ifsta,
2644 struct ieee80211_sta_bss *bss)
2645{
2646 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2647 int res, rates, i, j;
2648 struct sk_buff *skb;
2649 struct ieee80211_mgmt *mgmt;
2650 struct ieee80211_tx_control control;
f0706e82 2651 struct ieee80211_hw_mode *mode;
1abbe498 2652 struct rate_selection ratesel;
f0706e82
JB		 2653 u8 *pos;
2654 struct ieee80211_sub_if_data *sdata;
2655
2656 /* Remove possible STA entries from other IBSS networks. */
2657 sta_info_flush(local, NULL);
2658
2659 if (local->ops->reset_tsf) {
2660 /* Reset own TSF to allow time synchronization work. */
2661 local->ops->reset_tsf(local_to_hw(local));
2662 }
2663 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2664 res = ieee80211_if_config(dev);
2665 if (res)
2666 return res;
2667
2668 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2669
2670 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2671 sdata->drop_unencrypted = bss->capability &
2672 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2673
2674 res = ieee80211_set_channel(local, -1, bss->freq);
2675
2676 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2677 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2678 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2679 local->hw.conf.freq);
2680 return -1;
2681 }
2682
2683 /* Set beacon template based on scan results */
2684 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2685 do {
2686 if (!skb)
2687 break;
2688
2689 skb_reserve(skb, local->hw.extra_tx_headroom);
2690
2691 mgmt = (struct ieee80211_mgmt *)
2692 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2693 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2694 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2695 IEEE80211_STYPE_BEACON);
2696 memset(mgmt->da, 0xff, ETH_ALEN);
2697 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2698 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2699 mgmt->u.beacon.beacon_int =
2700 cpu_to_le16(local->hw.conf.beacon_int);
2701 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2702
2703 pos = skb_put(skb, 2 + ifsta->ssid_len);
2704 *pos++ = WLAN_EID_SSID;
2705 *pos++ = ifsta->ssid_len;
2706 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2707
2708 rates = bss->supp_rates_len;
2709 if (rates > 8)
2710 rates = 8;
2711 pos = skb_put(skb, 2 + rates);
2712 *pos++ = WLAN_EID_SUPP_RATES;
2713 *pos++ = rates;
2714 memcpy(pos, bss->supp_rates, rates);
2715
2716 pos = skb_put(skb, 2 + 1);
2717 *pos++ = WLAN_EID_DS_PARAMS;
2718 *pos++ = 1;
2719 *pos++ = bss->channel;
2720
2721 pos = skb_put(skb, 2 + 2);
2722 *pos++ = WLAN_EID_IBSS_PARAMS;
2723 *pos++ = 2;
2724 /* FIX: set ATIM window based on scan results */
2725 *pos++ = 0;
2726 *pos++ = 0;
2727
2728 if (bss->supp_rates_len > 8) {
2729 rates = bss->supp_rates_len - 8;
2730 pos = skb_put(skb, 2 + rates);
2731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2732 *pos++ = rates;
2733 memcpy(pos, &bss->supp_rates[8], rates);
2734 }
2735
2736 memset(&control, 0, sizeof(control));
1abbe498
MN		 2737 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2738 if (!ratesel.rate) {
f0706e82
JB		 2739 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2740 "for IBSS beacon\n", dev->name);
2741 break;
2742 }
13262ffd
JS		 2743 control.tx_rate =
2744 ((sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE) &&
1abbe498
MN		 2745 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2746 ratesel.rate->val2 : ratesel.rate->val;
f0706e82
JB		 2747 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2748 control.power_level = local->hw.conf.power_level;
2749 control.flags |= IEEE80211_TXCTL_NO_ACK;
2750 control.retry_limit = 1;
2751
2752 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2753 if (ifsta->probe_resp) {
2754 mgmt = (struct ieee80211_mgmt *)
2755 ifsta->probe_resp->data;
2756 mgmt->frame_control =
2757 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2758 IEEE80211_STYPE_PROBE_RESP);
2759 } else {
2760 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2761 "template for IBSS\n", dev->name);
2762 }
2763
2764 if (local->ops->beacon_update &&
2765 local->ops->beacon_update(local_to_hw(local),
2766 skb, &control) == 0) {
2767 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2768 "template based on scan results\n", dev->name);
2769 skb = NULL;
2770 }
2771
2772 rates = 0;
2773 mode = local->oper_hw_mode;
2774 for (i = 0; i < bss->supp_rates_len; i++) {
2775 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 2776 for (j = 0; j < mode->num_rates; j++)
2777 if (mode->rates[j].rate == bitrate)
2778 rates |= BIT(j);
2779 }
2780 ifsta->supp_rates_bits = rates;
2781 } while (0);
2782
2783 if (skb) {
2784 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2785 "template\n", dev->name);
2786 dev_kfree_skb(skb);
2787 }
2788
2789 ifsta->state = IEEE80211_IBSS_JOINED;
2790 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2791
2792 ieee80211_rx_bss_put(dev, bss);
2793
2794 return res;
2795}
2796
2797
2798static int ieee80211_sta_create_ibss(struct net_device *dev,
2799 struct ieee80211_if_sta *ifsta)
2800{
2801 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2802 struct ieee80211_sta_bss *bss;
cffdd30d 2803 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 2804 struct ieee80211_hw_mode *mode;
2805 u8 bssid[ETH_ALEN], *pos;
2806 int i;
0795af57 2807 DECLARE_MAC_BUF(mac);
f0706e82
JB		 2808
2809#if 0
2810 /* Easier testing, use fixed BSSID. */
2811 memset(bssid, 0xfe, ETH_ALEN);
2812#else
2813 /* Generate random, not broadcast, locally administered BSSID. Mix in
2814 * own MAC address to make sure that devices that do not have proper
2815 * random number generator get different BSSID. */
2816 get_random_bytes(bssid, ETH_ALEN);
2817 for (i = 0; i < ETH_ALEN; i++)
2818 bssid[i] ^= dev->dev_addr[i];
2819 bssid[0] &= ~0x01;
2820 bssid[0] |= 0x02;
2821#endif
2822
0795af57
JP		 2823 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
2824 dev->name, print_mac(mac, bssid));
f0706e82 2825
cffdd30d
JL		 2826 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
2827 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 2828 if (!bss)
2829 return -ENOMEM;
2830
f0706e82
JB		 2831 mode = local->oper_hw_mode;
2832
2833 if (local->hw.conf.beacon_int == 0)
2834 local->hw.conf.beacon_int = 100;
2835 bss->beacon_int = local->hw.conf.beacon_int;
2836 bss->hw_mode = local->hw.conf.phymode;
f0706e82
JB		 2837 bss->freq = local->hw.conf.freq;
2838 bss->last_update = jiffies;
2839 bss->capability = WLAN_CAPABILITY_IBSS;
2840 if (sdata->default_key) {
2841 bss->capability |= WLAN_CAPABILITY_PRIVACY;
2842 } else
2843 sdata->drop_unencrypted = 0;
2844 bss->supp_rates_len = mode->num_rates;
2845 pos = bss->supp_rates;
2846 for (i = 0; i < mode->num_rates; i++) {
2847 int rate = mode->rates[i].rate;
f0706e82
JB		 2848 *pos++ = (u8) (rate / 5);
2849 }
2850
2851 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2852}
2853
2854
2855static int ieee80211_sta_find_ibss(struct net_device *dev,
2856 struct ieee80211_if_sta *ifsta)
2857{
2858 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2859 struct ieee80211_sta_bss *bss;
2860 int found = 0;
2861 u8 bssid[ETH_ALEN];
2862 int active_ibss;
0795af57
JP		 2863 DECLARE_MAC_BUF(mac);
2864 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2865
2866 if (ifsta->ssid_len == 0)
2867 return -EINVAL;
2868
2869 active_ibss = ieee80211_sta_active_ibss(dev);
2870#ifdef CONFIG_MAC80211_IBSS_DEBUG
2871 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
2872 dev->name, active_ibss);
2873#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2874 spin_lock_bh(&local->sta_bss_lock);
2875 list_for_each_entry(bss, &local->sta_bss_list, list) {
2876 if (ifsta->ssid_len != bss->ssid_len ||
2877 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
2878 || !(bss->capability & WLAN_CAPABILITY_IBSS))
2879 continue;
2880#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2881 printk(KERN_DEBUG " bssid=%s found\n",
2882 print_mac(mac, bss->bssid));
f0706e82
JB		 2883#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2884 memcpy(bssid, bss->bssid, ETH_ALEN);
2885 found = 1;
2886 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
2887 break;
2888 }
2889 spin_unlock_bh(&local->sta_bss_lock);
2890
2891#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2892 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
2893 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 2894#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2895 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
cffdd30d
JL		 2896 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
2897 ifsta->ssid, ifsta->ssid_len))) {
0795af57 2898 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 2899 " based on configured SSID\n",
0795af57 2900 dev->name, print_mac(mac, bssid));
f0706e82
JB		 2901 return ieee80211_sta_join_ibss(dev, ifsta, bss);
2902 }
2903#ifdef CONFIG_MAC80211_IBSS_DEBUG
2904 printk(KERN_DEBUG " did not try to join ibss\n");
2905#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2906
2907 /* Selected IBSS not found in current scan results - try to scan */
2908 if (ifsta->state == IEEE80211_IBSS_JOINED &&
2909 !ieee80211_sta_active_ibss(dev)) {
2910 mod_timer(&ifsta->timer, jiffies +
2911 IEEE80211_IBSS_MERGE_INTERVAL);
2912 } else if (time_after(jiffies, local->last_scan_completed +
2913 IEEE80211_SCAN_INTERVAL)) {
2914 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
2915 "join\n", dev->name);
2916 return ieee80211_sta_req_scan(dev, ifsta->ssid,
2917 ifsta->ssid_len);
2918 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
2919 int interval = IEEE80211_SCAN_INTERVAL;
2920
2921 if (time_after(jiffies, ifsta->ibss_join_req +
2922 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 2923 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 2924 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
2925 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 2926 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 2927 printk(KERN_DEBUG "%s: IBSS not allowed on the"
2928 " configured channel %d (%d MHz)\n",
2929 dev->name, local->hw.conf.channel,
2930 local->hw.conf.freq);
2931 }
2932
2933 /* No IBSS found - decrease scan interval and continue
2934 * scanning. */
2935 interval = IEEE80211_SCAN_INTERVAL_SLOW;
2936 }
2937
2938 ifsta->state = IEEE80211_IBSS_SEARCH;
2939 mod_timer(&ifsta->timer, jiffies + interval);
2940 return 0;
2941 }
2942
2943 return 0;
2944}
2945
2946
2947int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
2948{
2949 struct ieee80211_sub_if_data *sdata;
2950 struct ieee80211_if_sta *ifsta;
2951 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2952
2953 if (len > IEEE80211_MAX_SSID_LEN)
2954 return -EINVAL;
2955
2956 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2957 * not defined. */
2958 if (local->ops->conf_tx) {
2959 struct ieee80211_tx_queue_params qparam;
2960 int i;
2961
2962 memset(&qparam, 0, sizeof(qparam));
2963 /* TODO: are these ok defaults for all hw_modes? */
2964 qparam.aifs = 2;
2965 qparam.cw_min =
2966 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
2967 qparam.cw_max = 1023;
2968 qparam.burst_time = 0;
2969 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2970 {
2971 local->ops->conf_tx(local_to_hw(local),
2972 i + IEEE80211_TX_QUEUE_DATA0,
2973 &qparam);
2974 }
2975 /* IBSS uses different parameters for Beacon sending */
2976 qparam.cw_min++;
2977 qparam.cw_min *= 2;
2978 qparam.cw_min--;
2979 local->ops->conf_tx(local_to_hw(local),
2980 IEEE80211_TX_QUEUE_BEACON, &qparam);
2981 }
2982
2983 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2984 ifsta = &sdata->u.sta;
2985
2986 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 2987 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2988 memcpy(ifsta->ssid, ssid, len);
2989 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
2990 ifsta->ssid_len = len;
2991
d6f2da5b
JS		 2992 if (len)
2993 ifsta->flags |= IEEE80211_STA_SSID_SET;
2994 else
2995 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
2996 if (sdata->type == IEEE80211_IF_TYPE_IBSS &&
2997 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 2998 ifsta->ibss_join_req = jiffies;
2999 ifsta->state = IEEE80211_IBSS_SEARCH;
3000 return ieee80211_sta_find_ibss(dev, ifsta);
3001 }
3002 return 0;
3003}
3004
3005
3006int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3007{
3008 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3009 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3010 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3011 *len = ifsta->ssid_len;
3012 return 0;
3013}
3014
3015
3016int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3017{
3018 struct ieee80211_sub_if_data *sdata;
3019 struct ieee80211_if_sta *ifsta;
3020 int res;
3021
3022 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3023 ifsta = &sdata->u.sta;
3024
3025 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3026 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3027 res = ieee80211_if_config(dev);
3028 if (res) {
3029 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3030 "the low-level driver\n", dev->name);
3031 return res;
3032 }
3033 }
3034
d6f2da5b
JS		 3035 if (is_valid_ether_addr(bssid))
3036 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3037 else
d6f2da5b
JS		 3038 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3039
f0706e82
JB		 3040 return 0;
3041}
3042
3043
3044static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3045 struct ieee80211_sub_if_data *sdata,
3046 int powersave)
3047{
3048 struct sk_buff *skb;
3049 struct ieee80211_hdr *nullfunc;
3050 u16 fc;
3051
3052 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3053 if (!skb) {
3054 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3055 "frame\n", sdata->dev->name);
3056 return;
3057 }
3058 skb_reserve(skb, local->hw.extra_tx_headroom);
3059
3060 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3061 memset(nullfunc, 0, 24);
3062 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3063 IEEE80211_FCTL_TODS;
3064 if (powersave)
3065 fc |= IEEE80211_FCTL_PM;
3066 nullfunc->frame_control = cpu_to_le16(fc);
3067 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3068 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3069 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3070
3071 ieee80211_sta_tx(sdata->dev, skb, 0);
3072}
3073
3074
3075void ieee80211_scan_completed(struct ieee80211_hw *hw)
3076{
3077 struct ieee80211_local *local = hw_to_local(hw);
3078 struct net_device *dev = local->scan_dev;
3079 struct ieee80211_sub_if_data *sdata;
3080 union iwreq_data wrqu;
3081
3082 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3083 memset(&wrqu, 0, sizeof(wrqu));
3084 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3085
ece8eddd
ZY		 3086 if (local->sta_hw_scanning) {
3087 local->sta_hw_scanning = 0;
3088 goto done;
3089 }
3090
3091 local->sta_sw_scanning = 0;
f0706e82 3092 if (ieee80211_hw_config(local))
4b50e388 3093 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3094 "channel after scan\n", dev->name);
3095
4150c572
JB		 3096
3097 netif_tx_lock_bh(local->mdev);
3098 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3099 local->ops->configure_filter(local_to_hw(local),
3100 FIF_BCN_PRBRESP_PROMISC,
3101 &local->filter_flags,
3102 local->mdev->mc_count,
3103 local->mdev->mc_list);
3104
3105 netif_tx_unlock_bh(local->mdev);
f0706e82 3106
79010420
JB		 3107 rcu_read_lock();
3108 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3109
3110 /* No need to wake the master device. */
3111 if (sdata->dev == local->mdev)
3112 continue;
3113
f0706e82 3114 if (sdata->type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 3115 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 3116 ieee80211_send_nullfunc(local, sdata, 0);
3117 ieee80211_sta_timer((unsigned long)sdata);
3118 }
14042cbe 3119
f0706e82
JB		 3120 netif_wake_queue(sdata->dev);
3121 }
79010420 3122 rcu_read_unlock();
f0706e82 3123
ece8eddd 3124done:
f0706e82
JB		 3125 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3126 if (sdata->type == IEEE80211_IF_TYPE_IBSS) {
3127 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3128 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3129 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3130 !ieee80211_sta_active_ibss(dev)))
3131 ieee80211_sta_find_ibss(dev, ifsta);
3132 }
3133}
3134EXPORT_SYMBOL(ieee80211_scan_completed);
3135
3136void ieee80211_sta_scan_work(struct work_struct *work)
3137{
3138 struct ieee80211_local *local =
3139 container_of(work, struct ieee80211_local, scan_work.work);
3140 struct net_device *dev = local->scan_dev;
3141 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3142 struct ieee80211_hw_mode *mode;
3143 struct ieee80211_channel *chan;
3144 int skip;
3145 unsigned long next_delay = 0;
3146
ece8eddd 3147 if (!local->sta_sw_scanning)
f0706e82
JB		 3148 return;
3149
3150 switch (local->scan_state) {
3151 case SCAN_SET_CHANNEL:
3152 mode = local->scan_hw_mode;
3153 if (local->scan_hw_mode->list.next == &local->modes_list &&
3154 local->scan_channel_idx >= mode->num_channels) {
3155 ieee80211_scan_completed(local_to_hw(local));
3156 return;
3157 }
3158 skip = !(local->enabled_modes & (1 << mode->mode));
3159 chan = &mode->channels[local->scan_channel_idx];
3160 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
3161 (sdata->type == IEEE80211_IF_TYPE_IBSS &&
3162 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3163 (local->hw_modes & local->enabled_modes &
3164 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3165 skip = 1;
3166
3167 if (!skip) {
3168#if 0
3169 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3170 dev->name, chan->chan, chan->freq);
3171#endif
3172
3173 local->scan_channel = chan;
3174 if (ieee80211_hw_config(local)) {
3175 printk(KERN_DEBUG "%s: failed to set channel "
3176 "%d (%d MHz) for scan\n", dev->name,
3177 chan->chan, chan->freq);
3178 skip = 1;
3179 }
3180 }
3181
3182 local->scan_channel_idx++;
3183 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3184 if (local->scan_hw_mode->list.next != &local->modes_list) {
3185 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3186 struct ieee80211_hw_mode,
3187 list);
3188 local->scan_channel_idx = 0;
3189 }
3190 }
3191
3192 if (skip)
3193 break;
3194
3195 next_delay = IEEE80211_PROBE_DELAY +
3196 usecs_to_jiffies(local->hw.channel_change_time);
3197 local->scan_state = SCAN_SEND_PROBE;
3198 break;
3199 case SCAN_SEND_PROBE:
3200 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3201 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3202 local->scan_ssid_len);
3203 next_delay = IEEE80211_CHANNEL_TIME;
3204 } else
3205 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3206 local->scan_state = SCAN_SET_CHANNEL;
3207 break;
3208 }
3209
ece8eddd 3210 if (local->sta_sw_scanning)
f0706e82
JB		 3211 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3212 next_delay);
3213}
3214
3215
3216static int ieee80211_sta_start_scan(struct net_device *dev,
3217 u8 *ssid, size_t ssid_len)
3218{
3219 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3220 struct ieee80211_sub_if_data *sdata;
3221
3222 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3223 return -EINVAL;
3224
3225 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3226 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3227 * BSSID: MACAddress
3228 * SSID
3229 * ScanType: ACTIVE, PASSIVE
3230 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3231 * a Probe frame during active scanning
3232 * ChannelList
3233 * MinChannelTime (>= ProbeDelay), in TU
3234 * MaxChannelTime: (>= MinChannelTime), in TU
3235 */
3236
3237 /* MLME-SCAN.confirm
3238 * BSSDescriptionSet
3239 * ResultCode: SUCCESS, INVALID_PARAMETERS
3240 */
3241
ece8eddd 3242 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3243 if (local->scan_dev == dev)
3244 return 0;
3245 return -EBUSY;
3246 }
3247
3248 if (local->ops->hw_scan) {
3249 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3250 ssid, ssid_len);
f0706e82 3251 if (!rc) {
ece8eddd 3252 local->sta_hw_scanning = 1;
f0706e82
JB		 3253 local->scan_dev = dev;
3254 }
3255 return rc;
3256 }
3257
ece8eddd 3258 local->sta_sw_scanning = 1;
f0706e82 3259
79010420
JB		 3260 rcu_read_lock();
3261 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3262
3263 /* Don't stop the master interface, otherwise we can't transmit
3264 * probes! */
3265 if (sdata->dev == local->mdev)
3266 continue;
3267
f0706e82
JB		 3268 netif_stop_queue(sdata->dev);
3269 if (sdata->type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3270 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3271 ieee80211_send_nullfunc(local, sdata, 1);
3272 }
79010420 3273 rcu_read_unlock();
f0706e82
JB		 3274
3275 if (ssid) {
3276 local->scan_ssid_len = ssid_len;
3277 memcpy(local->scan_ssid, ssid, ssid_len);
3278 } else
3279 local->scan_ssid_len = 0;
3280 local->scan_state = SCAN_SET_CHANNEL;
3281 local->scan_hw_mode = list_entry(local->modes_list.next,
3282 struct ieee80211_hw_mode,
3283 list);
3284 local->scan_channel_idx = 0;
3285 local->scan_dev = dev;
3286
4150c572
JB		 3287 netif_tx_lock_bh(local->mdev);
3288 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3289 local->ops->configure_filter(local_to_hw(local),
3290 FIF_BCN_PRBRESP_PROMISC,
3291 &local->filter_flags,
3292 local->mdev->mc_count,
3293 local->mdev->mc_list);
3294 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3295
3296 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3297 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3298 IEEE80211_CHANNEL_TIME);
3299
3300 return 0;
3301}
3302
3303
3304int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3305{
3306 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3307 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3308 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3309
3310 if (sdata->type != IEEE80211_IF_TYPE_STA)
3311 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3312
ece8eddd 3313 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3314 if (local->scan_dev == dev)
3315 return 0;
3316 return -EBUSY;
3317 }
3318
a0af5f14
HS		 3319 ifsta->scan_ssid_len = ssid_len;
3320 if (ssid_len)
3321 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3322 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3323 queue_work(local->hw.workqueue, &ifsta->work);
3324 return 0;
3325}
3326
3327static char *
3328ieee80211_sta_scan_result(struct net_device *dev,
3329 struct ieee80211_sta_bss *bss,
3330 char *current_ev, char *end_buf)
3331{
3332 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3333 struct iw_event iwe;
3334
3335 if (time_after(jiffies,
3336 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3337 return current_ev;
3338
3339 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3340 return current_ev;
3341
f0706e82
JB		 3342 memset(&iwe, 0, sizeof(iwe));
3343 iwe.cmd = SIOCGIWAP;
3344 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3345 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3346 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3347 IW_EV_ADDR_LEN);
3348
3349 memset(&iwe, 0, sizeof(iwe));
3350 iwe.cmd = SIOCGIWESSID;
3351 iwe.u.data.length = bss->ssid_len;
3352 iwe.u.data.flags = 1;
3353 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3354 bss->ssid);
3355
3356 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3357 memset(&iwe, 0, sizeof(iwe));
3358 iwe.cmd = SIOCGIWMODE;
3359 if (bss->capability & WLAN_CAPABILITY_ESS)
3360 iwe.u.mode = IW_MODE_MASTER;
3361 else
3362 iwe.u.mode = IW_MODE_ADHOC;
3363 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3364 IW_EV_UINT_LEN);
3365 }
3366
3367 memset(&iwe, 0, sizeof(iwe));
3368 iwe.cmd = SIOCGIWFREQ;
3369 iwe.u.freq.m = bss->channel;
3370 iwe.u.freq.e = 0;
3371 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3372 IW_EV_FREQ_LEN);
3373 iwe.u.freq.m = bss->freq * 100000;
3374 iwe.u.freq.e = 1;
3375 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3376 IW_EV_FREQ_LEN);
3377
3378 memset(&iwe, 0, sizeof(iwe));
3379 iwe.cmd = IWEVQUAL;
3380 iwe.u.qual.qual = bss->signal;
3381 iwe.u.qual.level = bss->rssi;
3382 iwe.u.qual.noise = bss->noise;
3383 iwe.u.qual.updated = local->wstats_flags;
3384 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3385 IW_EV_QUAL_LEN);
3386
3387 memset(&iwe, 0, sizeof(iwe));
3388 iwe.cmd = SIOCGIWENCODE;
3389 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3390 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3391 else
3392 iwe.u.data.flags = IW_ENCODE_DISABLED;
3393 iwe.u.data.length = 0;
3394 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3395
3396 if (bss && bss->wpa_ie) {
3397 memset(&iwe, 0, sizeof(iwe));
3398 iwe.cmd = IWEVGENIE;
3399 iwe.u.data.length = bss->wpa_ie_len;
3400 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3401 bss->wpa_ie);
3402 }
3403
3404 if (bss && bss->rsn_ie) {
3405 memset(&iwe, 0, sizeof(iwe));
3406 iwe.cmd = IWEVGENIE;
3407 iwe.u.data.length = bss->rsn_ie_len;
3408 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3409 bss->rsn_ie);
3410 }
3411
3412 if (bss && bss->supp_rates_len > 0) {
3413 /* display all supported rates in readable format */
3414 char *p = current_ev + IW_EV_LCP_LEN;
3415 int i;
3416
3417 memset(&iwe, 0, sizeof(iwe));
3418 iwe.cmd = SIOCGIWRATE;
3419 /* Those two flags are ignored... */
3420 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3421
3422 for (i = 0; i < bss->supp_rates_len; i++) {
3423 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3424 0x7f) * 500000);
3425 p = iwe_stream_add_value(current_ev, p,
3426 end_buf, &iwe, IW_EV_PARAM_LEN);
3427 }
3428 current_ev = p;
3429 }
3430
3431 if (bss) {
3432 char *buf;
3433 buf = kmalloc(30, GFP_ATOMIC);
3434 if (buf) {
3435 memset(&iwe, 0, sizeof(iwe));
3436 iwe.cmd = IWEVCUSTOM;
3437 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3438 iwe.u.data.length = strlen(buf);
3439 current_ev = iwe_stream_add_point(current_ev, end_buf,
3440 &iwe, buf);
3441 kfree(buf);
3442 }
3443 }
3444
f0706e82
JB		 3445 return current_ev;
3446}
3447
3448
3449int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3450{
3451 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3452 char *current_ev = buf;
3453 char *end_buf = buf + len;
3454 struct ieee80211_sta_bss *bss;
3455
3456 spin_lock_bh(&local->sta_bss_lock);
3457 list_for_each_entry(bss, &local->sta_bss_list, list) {
3458 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3459 spin_unlock_bh(&local->sta_bss_lock);
3460 return -E2BIG;
3461 }
3462 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3463 end_buf);
3464 }
3465 spin_unlock_bh(&local->sta_bss_lock);
3466 return current_ev - buf;
3467}
3468
3469
3470int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3471{
3472 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3473 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3474 kfree(ifsta->extra_ie);
3475 if (len == 0) {
3476 ifsta->extra_ie = NULL;
3477 ifsta->extra_ie_len = 0;
3478 return 0;
3479 }
3480 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3481 if (!ifsta->extra_ie) {
3482 ifsta->extra_ie_len = 0;
3483 return -ENOMEM;
3484 }
3485 memcpy(ifsta->extra_ie, ie, len);
3486 ifsta->extra_ie_len = len;
3487 return 0;
3488}
3489
3490
3491struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3492 struct sk_buff *skb, u8 *bssid,
3493 u8 *addr)
3494{
3495 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3496 struct sta_info *sta;
91fa558b 3497 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3498 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3499
3500 /* TODO: Could consider removing the least recently used entry and
3501 * allow new one to be added. */
3502 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3503 if (net_ratelimit()) {
3504 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3505 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3506 }
3507 return NULL;
3508 }
3509
0795af57 3510 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3511 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3512
3513 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3514 if (!sta)
3515 return NULL;
3516
3517 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3518
3519 rate_control_rate_init(sta, local);
3520
3521 return sta; /* caller will call sta_info_put() */
3522}
3523
3524
3525int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3526{
3527 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3528 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3529
3530 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3531 dev->name, reason);
3532
3533 if (sdata->type != IEEE80211_IF_TYPE_STA &&
3534 sdata->type != IEEE80211_IF_TYPE_IBSS)
3535 return -EINVAL;
3536
3537 ieee80211_send_deauth(dev, ifsta, reason);
3538 ieee80211_set_disassoc(dev, ifsta, 1);
3539 return 0;
3540}
3541
3542
3543int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3544{
3545 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3546 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3547
3548 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3549 dev->name, reason);
3550
3551 if (sdata->type != IEEE80211_IF_TYPE_STA)
3552 return -EINVAL;
3553
d6f2da5b 3554 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3555 return -1;
3556
3557 ieee80211_send_disassoc(dev, ifsta, reason);
3558 ieee80211_set_disassoc(dev, ifsta, 0);
3559 return 0;
3560}
Ubuntu Artful kernel mirror