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rt2x00: Fix queue index handling
[linux-2.6-block.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
688b88a4
RR		 66#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
67#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 68
07db2183
RR		 69/* next values represent the buffer size for A-MPDU frame.
70 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
71#define IEEE80211_MIN_AMPDU_BUF 0x8
72#define IEEE80211_MAX_AMPDU_BUF 0x40
73
f0706e82
JB		 74static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
75 u8 *ssid, size_t ssid_len);
76static struct ieee80211_sta_bss *
cffdd30d
JL		 77ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
78 u8 *ssid, u8 ssid_len);
f0706e82
JB		 79static void ieee80211_rx_bss_put(struct net_device *dev,
80 struct ieee80211_sta_bss *bss);
81static int ieee80211_sta_find_ibss(struct net_device *dev,
82 struct ieee80211_if_sta *ifsta);
83static int ieee80211_sta_wep_configured(struct net_device *dev);
84static int ieee80211_sta_start_scan(struct net_device *dev,
85 u8 *ssid, size_t ssid_len);
86static int ieee80211_sta_config_auth(struct net_device *dev,
87 struct ieee80211_if_sta *ifsta);
88
89
90/* Parsed Information Elements */
91struct ieee802_11_elems {
5558235c 92 /* pointers to IEs */
f0706e82 93 u8 *ssid;
f0706e82 94 u8 *supp_rates;
f0706e82 95 u8 *fh_params;
f0706e82 96 u8 *ds_params;
f0706e82 97 u8 *cf_params;
f0706e82 98 u8 *tim;
f0706e82 99 u8 *ibss_params;
f0706e82 100 u8 *challenge;
f0706e82 101 u8 *wpa;
f0706e82 102 u8 *rsn;
f0706e82 103 u8 *erp_info;
f0706e82 104 u8 *ext_supp_rates;
f0706e82 105 u8 *wmm_info;
f0706e82 106 u8 *wmm_param;
c7153508
RR		 107 u8 *ht_cap_elem;
108 u8 *ht_info_elem;
5558235c
JB		 109 /* length of them, respectively */
110 u8 ssid_len;
111 u8 supp_rates_len;
112 u8 fh_params_len;
113 u8 ds_params_len;
114 u8 cf_params_len;
115 u8 tim_len;
116 u8 ibss_params_len;
117 u8 challenge_len;
118 u8 wpa_len;
119 u8 rsn_len;
120 u8 erp_info_len;
121 u8 ext_supp_rates_len;
122 u8 wmm_info_len;
f0706e82 123 u8 wmm_param_len;
c7153508
RR		 124 u8 ht_cap_elem_len;
125 u8 ht_info_elem_len;
f0706e82
JB		 126};
127
67a4cce4
JL		 128static void ieee802_11_parse_elems(u8 *start, size_t len,
129 struct ieee802_11_elems *elems)
f0706e82
JB		 130{
131 size_t left = len;
132 u8 *pos = start;
f0706e82
JB		 133
134 memset(elems, 0, sizeof(*elems));
135
136 while (left >= 2) {
137 u8 id, elen;
138
139 id = *pos++;
140 elen = *pos++;
141 left -= 2;
142
67a4cce4
JL		 143 if (elen > left)
144 return;
f0706e82
JB		 145
146 switch (id) {
147 case WLAN_EID_SSID:
148 elems->ssid = pos;
149 elems->ssid_len = elen;
150 break;
151 case WLAN_EID_SUPP_RATES:
152 elems->supp_rates = pos;
153 elems->supp_rates_len = elen;
154 break;
155 case WLAN_EID_FH_PARAMS:
156 elems->fh_params = pos;
157 elems->fh_params_len = elen;
158 break;
159 case WLAN_EID_DS_PARAMS:
160 elems->ds_params = pos;
161 elems->ds_params_len = elen;
162 break;
163 case WLAN_EID_CF_PARAMS:
164 elems->cf_params = pos;
165 elems->cf_params_len = elen;
166 break;
167 case WLAN_EID_TIM:
168 elems->tim = pos;
169 elems->tim_len = elen;
170 break;
171 case WLAN_EID_IBSS_PARAMS:
172 elems->ibss_params = pos;
173 elems->ibss_params_len = elen;
174 break;
175 case WLAN_EID_CHALLENGE:
176 elems->challenge = pos;
177 elems->challenge_len = elen;
178 break;
179 case WLAN_EID_WPA:
180 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
181 pos[2] == 0xf2) {
182 /* Microsoft OUI (00:50:F2) */
183 if (pos[3] == 1) {
184 /* OUI Type 1 - WPA IE */
185 elems->wpa = pos;
186 elems->wpa_len = elen;
187 } else if (elen >= 5 && pos[3] == 2) {
188 if (pos[4] == 0) {
189 elems->wmm_info = pos;
190 elems->wmm_info_len = elen;
191 } else if (pos[4] == 1) {
192 elems->wmm_param = pos;
193 elems->wmm_param_len = elen;
194 }
195 }
196 }
197 break;
198 case WLAN_EID_RSN:
199 elems->rsn = pos;
200 elems->rsn_len = elen;
201 break;
202 case WLAN_EID_ERP_INFO:
203 elems->erp_info = pos;
204 elems->erp_info_len = elen;
205 break;
206 case WLAN_EID_EXT_SUPP_RATES:
207 elems->ext_supp_rates = pos;
208 elems->ext_supp_rates_len = elen;
209 break;
c7153508
RR		 210 case WLAN_EID_HT_CAPABILITY:
211 elems->ht_cap_elem = pos;
212 elems->ht_cap_elem_len = elen;
213 break;
214 case WLAN_EID_HT_EXTRA_INFO:
215 elems->ht_info_elem = pos;
216 elems->ht_info_elem_len = elen;
217 break;
f0706e82 218 default:
f0706e82
JB		 219 break;
220 }
221
222 left -= elen;
223 pos += elen;
224 }
f0706e82
JB		 225}
226
227
f0706e82
JB		 228static int ecw2cw(int ecw)
229{
230 int cw = 1;
231 while (ecw > 0) {
232 cw <<= 1;
233 ecw--;
234 }
235 return cw - 1;
236}
237
f0706e82
JB		 238static void ieee80211_sta_wmm_params(struct net_device *dev,
239 struct ieee80211_if_sta *ifsta,
240 u8 *wmm_param, size_t wmm_param_len)
241{
242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
243 struct ieee80211_tx_queue_params params;
244 size_t left;
245 int count;
246 u8 *pos;
247
248 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
249 return;
250 count = wmm_param[6] & 0x0f;
251 if (count == ifsta->wmm_last_param_set)
252 return;
253 ifsta->wmm_last_param_set = count;
254
255 pos = wmm_param + 8;
256 left = wmm_param_len - 8;
257
258 memset(&params, 0, sizeof(params));
259
260 if (!local->ops->conf_tx)
261 return;
262
263 local->wmm_acm = 0;
264 for (; left >= 4; left -= 4, pos += 4) {
265 int aci = (pos[0] >> 5) & 0x03;
266 int acm = (pos[0] >> 4) & 0x01;
267 int queue;
268
269 switch (aci) {
270 case 1:
271 queue = IEEE80211_TX_QUEUE_DATA3;
272 if (acm) {
273 local->wmm_acm |= BIT(0) | BIT(3);
274 }
275 break;
276 case 2:
277 queue = IEEE80211_TX_QUEUE_DATA1;
278 if (acm) {
279 local->wmm_acm |= BIT(4) | BIT(5);
280 }
281 break;
282 case 3:
283 queue = IEEE80211_TX_QUEUE_DATA0;
284 if (acm) {
285 local->wmm_acm |= BIT(6) | BIT(7);
286 }
287 break;
288 case 0:
289 default:
290 queue = IEEE80211_TX_QUEUE_DATA2;
291 if (acm) {
292 local->wmm_acm |= BIT(1) | BIT(2);
293 }
294 break;
295 }
296
297 params.aifs = pos[0] & 0x0f;
298 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
299 params.cw_min = ecw2cw(pos[1] & 0x0f);
300 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
301 params.burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
302 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
303 "cWmin=%d cWmax=%d burst=%d\n",
304 dev->name, queue, aci, acm, params.aifs, params.cw_min,
305 params.cw_max, params.burst_time);
306 /* TODO: handle ACM (block TX, fallback to next lowest allowed
307 * AC for now) */
308 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
309 printk(KERN_DEBUG "%s: failed to set TX queue "
310 "parameters for queue %d\n", dev->name, queue);
311 }
312 }
313}
314
315
471b3efd
JB		 316static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
317 u8 erp_value)
5628221c 318{
471b3efd 319 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
5628221c 320 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
471b3efd
JB		 321 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
322 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
0795af57 323 DECLARE_MAC_BUF(mac);
471b3efd 324 u32 changed = 0;
5628221c 325
471b3efd 326 if (use_protection != bss_conf->use_cts_prot) {
5628221c
DD		 327 if (net_ratelimit()) {
328 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 329 "%s)\n",
471b3efd 330 sdata->dev->name,
5628221c 331 use_protection ? "enabled" : "disabled",
0795af57 332 print_mac(mac, ifsta->bssid));
5628221c 333 }
471b3efd
JB		 334 bss_conf->use_cts_prot = use_protection;
335 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 336 }
7e9ed188 337
471b3efd 338 if (preamble_mode != bss_conf->use_short_preamble) {
7e9ed188
DD		 339 if (net_ratelimit()) {
340 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 341 " (BSSID=%s)\n",
471b3efd 342 sdata->dev->name,
7e9ed188
DD		 343 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
344 "short" : "long",
0795af57 345 print_mac(mac, ifsta->bssid));
7e9ed188 346 }
471b3efd
JB		 347 bss_conf->use_short_preamble = preamble_mode;
348 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 349 }
d9430a32 350
471b3efd 351 return changed;
5628221c
DD		 352}
353
c7153508
RR		 354int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
355 struct ieee80211_ht_info *ht_info)
356{
357
358 if (ht_info == NULL)
359 return -EINVAL;
360
361 memset(ht_info, 0, sizeof(*ht_info));
362
363 if (ht_cap_ie) {
364 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
365
366 ht_info->ht_supported = 1;
367 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
368 ht_info->ampdu_factor =
369 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
370 ht_info->ampdu_density =
371 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
372 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
373 } else
374 ht_info->ht_supported = 0;
375
376 return 0;
377}
378
379int ieee80211_ht_addt_info_ie_to_ht_bss_info(
380 struct ieee80211_ht_addt_info *ht_add_info_ie,
381 struct ieee80211_ht_bss_info *bss_info)
382{
383 if (bss_info == NULL)
384 return -EINVAL;
385
386 memset(bss_info, 0, sizeof(*bss_info));
387
388 if (ht_add_info_ie) {
389 u16 op_mode;
390 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
391
392 bss_info->primary_channel = ht_add_info_ie->control_chan;
393 bss_info->bss_cap = ht_add_info_ie->ht_param;
394 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
395 }
396
397 return 0;
398}
5628221c 399
f0706e82
JB		 400static void ieee80211_sta_send_associnfo(struct net_device *dev,
401 struct ieee80211_if_sta *ifsta)
402{
403 char *buf;
404 size_t len;
405 int i;
406 union iwreq_data wrqu;
407
408 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
409 return;
410
411 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 412 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 413 if (!buf)
414 return;
415
416 len = sprintf(buf, "ASSOCINFO(");
417 if (ifsta->assocreq_ies) {
418 len += sprintf(buf + len, "ReqIEs=");
419 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
420 len += sprintf(buf + len, "%02x",
421 ifsta->assocreq_ies[i]);
422 }
423 }
424 if (ifsta->assocresp_ies) {
425 if (ifsta->assocreq_ies)
426 len += sprintf(buf + len, " ");
427 len += sprintf(buf + len, "RespIEs=");
428 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
429 len += sprintf(buf + len, "%02x",
430 ifsta->assocresp_ies[i]);
431 }
432 }
433 len += sprintf(buf + len, ")");
434
435 if (len > IW_CUSTOM_MAX) {
436 len = sprintf(buf, "ASSOCRESPIE=");
437 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
438 len += sprintf(buf + len, "%02x",
439 ifsta->assocresp_ies[i]);
440 }
441 }
442
443 memset(&wrqu, 0, sizeof(wrqu));
444 wrqu.data.length = len;
445 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
446
447 kfree(buf);
448}
449
450
451static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 452 struct ieee80211_if_sta *ifsta,
47f0c502 453 bool assoc)
f0706e82 454{
471b3efd
JB		 455 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
456 struct ieee80211_local *local = sdata->local;
f0706e82 457 union iwreq_data wrqu;
471b3efd 458 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 459
f0706e82 460 if (assoc) {
5628221c 461 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 462
463 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
464
51fb61e7 465 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 466 return;
5628221c 467
65c107ab 468 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 469 local->hw.conf.channel,
470 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 471 if (bss) {
472 if (bss->has_erp_value)
471b3efd
JB		 473 changed |= ieee80211_handle_erp_ie(
474 sdata, bss->erp_value);
5628221c
DD		 475 ieee80211_rx_bss_put(dev, bss);
476 }
477
f0706e82 478 netif_carrier_on(dev);
d6f2da5b 479 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 480 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
481 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
482 ieee80211_sta_send_associnfo(dev, ifsta);
483 } else {
d6f2da5b
JS		 484 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
485
f0706e82 486 netif_carrier_off(dev);
d9430a32 487 ieee80211_reset_erp_info(dev);
f0706e82
JB		 488 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
489 }
490 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
491 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
492 ifsta->last_probe = jiffies;
47f0c502 493 ieee80211_led_assoc(local, assoc);
471b3efd 494
b2205256 495 sdata->bss_conf.assoc = assoc;
471b3efd 496 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 497}
498
499static void ieee80211_set_disassoc(struct net_device *dev,
500 struct ieee80211_if_sta *ifsta, int deauth)
501{
502 if (deauth)
503 ifsta->auth_tries = 0;
504 ifsta->assoc_tries = 0;
505 ieee80211_set_associated(dev, ifsta, 0);
506}
507
508static void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
509 int encrypt)
510{
511 struct ieee80211_sub_if_data *sdata;
512 struct ieee80211_tx_packet_data *pkt_data;
513
514 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
515 skb->dev = sdata->local->mdev;
516 skb_set_mac_header(skb, 0);
517 skb_set_network_header(skb, 0);
518 skb_set_transport_header(skb, 0);
519
520 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
521 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
522 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 523 if (!encrypt)
524 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 525
526 dev_queue_xmit(skb);
527}
528
529
530static void ieee80211_send_auth(struct net_device *dev,
531 struct ieee80211_if_sta *ifsta,
532 int transaction, u8 *extra, size_t extra_len,
533 int encrypt)
534{
535 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
536 struct sk_buff *skb;
537 struct ieee80211_mgmt *mgmt;
538
539 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
540 sizeof(*mgmt) + 6 + extra_len);
541 if (!skb) {
542 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
543 "frame\n", dev->name);
544 return;
545 }
546 skb_reserve(skb, local->hw.extra_tx_headroom);
547
548 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
549 memset(mgmt, 0, 24 + 6);
550 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
551 IEEE80211_STYPE_AUTH);
552 if (encrypt)
553 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
554 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
555 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
556 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
557 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
558 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
559 ifsta->auth_transaction = transaction + 1;
560 mgmt->u.auth.status_code = cpu_to_le16(0);
561 if (extra)
562 memcpy(skb_put(skb, extra_len), extra, extra_len);
563
564 ieee80211_sta_tx(dev, skb, encrypt);
565}
566
567
568static void ieee80211_authenticate(struct net_device *dev,
569 struct ieee80211_if_sta *ifsta)
570{
0795af57
JP		 571 DECLARE_MAC_BUF(mac);
572
f0706e82
JB		 573 ifsta->auth_tries++;
574 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 575 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 576 " timed out\n",
0795af57 577 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 578 ifsta->state = IEEE80211_DISABLED;
579 return;
580 }
581
582 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 583 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
584 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 585
586 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
587
588 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
589}
590
591
592static void ieee80211_send_assoc(struct net_device *dev,
593 struct ieee80211_if_sta *ifsta)
594{
595 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
596 struct ieee80211_hw_mode *mode;
597 struct sk_buff *skb;
598 struct ieee80211_mgmt *mgmt;
599 u8 *pos, *ies;
600 int i, len;
601 u16 capab;
602 struct ieee80211_sta_bss *bss;
603 int wmm = 0;
604
605 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
606 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
607 ifsta->ssid_len);
608 if (!skb) {
609 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
610 "frame\n", dev->name);
611 return;
612 }
613 skb_reserve(skb, local->hw.extra_tx_headroom);
614
615 mode = local->oper_hw_mode;
616 capab = ifsta->capab;
617 if (mode->mode == MODE_IEEE80211G) {
618 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
619 WLAN_CAPABILITY_SHORT_PREAMBLE;
620 }
cffdd30d
JL		 621 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
622 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 623 if (bss) {
624 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
625 capab |= WLAN_CAPABILITY_PRIVACY;
626 if (bss->wmm_ie) {
627 wmm = 1;
628 }
629 ieee80211_rx_bss_put(dev, bss);
630 }
631
632 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
633 memset(mgmt, 0, 24);
634 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
635 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
636 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
637
d6f2da5b 638 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 639 skb_put(skb, 10);
640 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
641 IEEE80211_STYPE_REASSOC_REQ);
642 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
643 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
644 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
645 ETH_ALEN);
646 } else {
647 skb_put(skb, 4);
648 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
649 IEEE80211_STYPE_ASSOC_REQ);
650 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
651 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
652 }
653
654 /* SSID */
655 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
656 *pos++ = WLAN_EID_SSID;
657 *pos++ = ifsta->ssid_len;
658 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
659
660 len = mode->num_rates;
661 if (len > 8)
662 len = 8;
663 pos = skb_put(skb, len + 2);
664 *pos++ = WLAN_EID_SUPP_RATES;
665 *pos++ = len;
666 for (i = 0; i < len; i++) {
667 int rate = mode->rates[i].rate;
f0706e82
JB		 668 *pos++ = (u8) (rate / 5);
669 }
670
671 if (mode->num_rates > len) {
672 pos = skb_put(skb, mode->num_rates - len + 2);
673 *pos++ = WLAN_EID_EXT_SUPP_RATES;
674 *pos++ = mode->num_rates - len;
675 for (i = len; i < mode->num_rates; i++) {
676 int rate = mode->rates[i].rate;
f0706e82
JB		 677 *pos++ = (u8) (rate / 5);
678 }
679 }
680
681 if (ifsta->extra_ie) {
682 pos = skb_put(skb, ifsta->extra_ie_len);
683 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
684 }
685
d6f2da5b 686 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 687 pos = skb_put(skb, 9);
688 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
689 *pos++ = 7; /* len */
690 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
691 *pos++ = 0x50;
692 *pos++ = 0xf2;
693 *pos++ = 2; /* WME */
694 *pos++ = 0; /* WME info */
695 *pos++ = 1; /* WME ver */
696 *pos++ = 0;
697 }
c7153508
RR		 698 /* wmm support is a must to HT */
699 if (wmm && mode->ht_info.ht_supported) {
700 __le16 tmp = cpu_to_le16(mode->ht_info.cap);
701 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
702 *pos++ = WLAN_EID_HT_CAPABILITY;
703 *pos++ = sizeof(struct ieee80211_ht_cap);
704 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
705 memcpy(pos, &tmp, sizeof(u16));
706 pos += sizeof(u16);
707 *pos++ = (mode->ht_info.ampdu_factor |
708 (mode->ht_info.ampdu_density << 2));
709 memcpy(pos, mode->ht_info.supp_mcs_set, 16);
710 }
f0706e82
JB		 711
712 kfree(ifsta->assocreq_ies);
713 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 714 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 715 if (ifsta->assocreq_ies)
716 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
717
718 ieee80211_sta_tx(dev, skb, 0);
719}
720
721
722static void ieee80211_send_deauth(struct net_device *dev,
723 struct ieee80211_if_sta *ifsta, u16 reason)
724{
725 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
726 struct sk_buff *skb;
727 struct ieee80211_mgmt *mgmt;
728
729 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
730 if (!skb) {
731 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
732 "frame\n", dev->name);
733 return;
734 }
735 skb_reserve(skb, local->hw.extra_tx_headroom);
736
737 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
738 memset(mgmt, 0, 24);
739 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
740 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
741 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
742 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
743 IEEE80211_STYPE_DEAUTH);
744 skb_put(skb, 2);
745 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
746
747 ieee80211_sta_tx(dev, skb, 0);
748}
749
750
751static void ieee80211_send_disassoc(struct net_device *dev,
752 struct ieee80211_if_sta *ifsta, u16 reason)
753{
754 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
755 struct sk_buff *skb;
756 struct ieee80211_mgmt *mgmt;
757
758 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
759 if (!skb) {
760 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
761 "frame\n", dev->name);
762 return;
763 }
764 skb_reserve(skb, local->hw.extra_tx_headroom);
765
766 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
767 memset(mgmt, 0, 24);
768 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
769 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
770 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
771 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
772 IEEE80211_STYPE_DISASSOC);
773 skb_put(skb, 2);
774 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
775
776 ieee80211_sta_tx(dev, skb, 0);
777}
778
779
780static int ieee80211_privacy_mismatch(struct net_device *dev,
781 struct ieee80211_if_sta *ifsta)
782{
65c107ab 783 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 784 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 785 int bss_privacy;
786 int wep_privacy;
787 int privacy_invoked;
f0706e82 788
5b98b1f7 789 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 790 return 0;
791
cffdd30d
JL		 792 bss = ieee80211_rx_bss_get(dev, ifsta->bssid, local->hw.conf.channel,
793 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 794 if (!bss)
795 return 0;
796
5b98b1f7
JB		 797 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
798 wep_privacy = !!ieee80211_sta_wep_configured(dev);
799 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 800
801 ieee80211_rx_bss_put(dev, bss);
802
5b98b1f7
JB		 803 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
804 return 0;
805
806 return 1;
f0706e82
JB		 807}
808
809
810static void ieee80211_associate(struct net_device *dev,
811 struct ieee80211_if_sta *ifsta)
812{
0795af57
JP		 813 DECLARE_MAC_BUF(mac);
814
f0706e82
JB		 815 ifsta->assoc_tries++;
816 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 817 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 818 " timed out\n",
0795af57 819 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 820 ifsta->state = IEEE80211_DISABLED;
821 return;
822 }
823
824 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 825 printk(KERN_DEBUG "%s: associate with AP %s\n",
826 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 827 if (ieee80211_privacy_mismatch(dev, ifsta)) {
828 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
829 "mixed-cell disabled - abort association\n", dev->name);
830 ifsta->state = IEEE80211_DISABLED;
831 return;
832 }
833
834 ieee80211_send_assoc(dev, ifsta);
835
836 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
837}
838
839
840static void ieee80211_associated(struct net_device *dev,
841 struct ieee80211_if_sta *ifsta)
842{
843 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
844 struct sta_info *sta;
845 int disassoc;
0795af57 846 DECLARE_MAC_BUF(mac);
f0706e82
JB		 847
848 /* TODO: start monitoring current AP signal quality and number of
849 * missed beacons. Scan other channels every now and then and search
850 * for better APs. */
851 /* TODO: remove expired BSSes */
852
853 ifsta->state = IEEE80211_ASSOCIATED;
854
855 sta = sta_info_get(local, ifsta->bssid);
856 if (!sta) {
0795af57
JP		 857 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
858 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 859 disassoc = 1;
860 } else {
861 disassoc = 0;
862 if (time_after(jiffies,
863 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 864 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 865 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 866 "current AP %s - assume out of "
f0706e82 867 "range\n",
0795af57 868 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 869 disassoc = 1;
be8755e1 870 sta_info_free(sta);
d6f2da5b 871 } else
f0706e82
JB		 872 ieee80211_send_probe_req(dev, ifsta->bssid,
873 local->scan_ssid,
874 local->scan_ssid_len);
d6f2da5b 875 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 876 } else {
d6f2da5b 877 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 878 if (time_after(jiffies, ifsta->last_probe +
879 IEEE80211_PROBE_INTERVAL)) {
880 ifsta->last_probe = jiffies;
881 ieee80211_send_probe_req(dev, ifsta->bssid,
882 ifsta->ssid,
883 ifsta->ssid_len);
884 }
885 }
886 sta_info_put(sta);
887 }
888 if (disassoc) {
2d192d95
MW		 889 ifsta->state = IEEE80211_DISABLED;
890 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 891 } else {
892 mod_timer(&ifsta->timer, jiffies +
893 IEEE80211_MONITORING_INTERVAL);
894 }
895}
896
897
898static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
899 u8 *ssid, size_t ssid_len)
900{
901 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
902 struct ieee80211_hw_mode *mode;
903 struct sk_buff *skb;
904 struct ieee80211_mgmt *mgmt;
905 u8 *pos, *supp_rates, *esupp_rates = NULL;
906 int i;
907
908 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
909 if (!skb) {
910 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
911 "request\n", dev->name);
912 return;
913 }
914 skb_reserve(skb, local->hw.extra_tx_headroom);
915
916 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
917 memset(mgmt, 0, 24);
918 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
919 IEEE80211_STYPE_PROBE_REQ);
920 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
921 if (dst) {
922 memcpy(mgmt->da, dst, ETH_ALEN);
923 memcpy(mgmt->bssid, dst, ETH_ALEN);
924 } else {
925 memset(mgmt->da, 0xff, ETH_ALEN);
926 memset(mgmt->bssid, 0xff, ETH_ALEN);
927 }
928 pos = skb_put(skb, 2 + ssid_len);
929 *pos++ = WLAN_EID_SSID;
930 *pos++ = ssid_len;
931 memcpy(pos, ssid, ssid_len);
932
933 supp_rates = skb_put(skb, 2);
934 supp_rates[0] = WLAN_EID_SUPP_RATES;
935 supp_rates[1] = 0;
936 mode = local->oper_hw_mode;
937 for (i = 0; i < mode->num_rates; i++) {
938 struct ieee80211_rate *rate = &mode->rates[i];
939 if (!(rate->flags & IEEE80211_RATE_SUPPORTED))
940 continue;
941 if (esupp_rates) {
942 pos = skb_put(skb, 1);
943 esupp_rates[1]++;
944 } else if (supp_rates[1] == 8) {
945 esupp_rates = skb_put(skb, 3);
946 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
947 esupp_rates[1] = 1;
948 pos = &esupp_rates[2];
949 } else {
950 pos = skb_put(skb, 1);
951 supp_rates[1]++;
952 }
b708e610 953 *pos = rate->rate / 5;
f0706e82
JB		 954 }
955
956 ieee80211_sta_tx(dev, skb, 0);
957}
958
959
960static int ieee80211_sta_wep_configured(struct net_device *dev)
961{
962 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
963 if (!sdata || !sdata->default_key ||
8f20fc24 964 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 965 return 0;
966 return 1;
967}
968
969
970static void ieee80211_auth_completed(struct net_device *dev,
971 struct ieee80211_if_sta *ifsta)
972{
973 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 974 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 975 ieee80211_associate(dev, ifsta);
976}
977
978
979static void ieee80211_auth_challenge(struct net_device *dev,
980 struct ieee80211_if_sta *ifsta,
981 struct ieee80211_mgmt *mgmt,
982 size_t len)
983{
984 u8 *pos;
985 struct ieee802_11_elems elems;
986
987 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
988 pos = mgmt->u.auth.variable;
67a4cce4 989 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 990 if (!elems.challenge) {
991 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
992 "frame\n", dev->name);
993 return;
994 }
995 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
996 elems.challenge_len + 2, 1);
997}
998
9f985b0e
RR		 999static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1000 u8 dialog_token, u16 status, u16 policy,
1001 u16 buf_size, u16 timeout)
1002{
1003 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1004 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1005 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1006 struct sk_buff *skb;
1007 struct ieee80211_mgmt *mgmt;
1008 u16 capab;
1009
07db2183
RR		 1010 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1011 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1012 if (!skb) {
1013 printk(KERN_DEBUG "%s: failed to allocate buffer "
1014 "for addba resp frame\n", dev->name);
1015 return;
1016 }
1017
1018 skb_reserve(skb, local->hw.extra_tx_headroom);
1019 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1020 memset(mgmt, 0, 24);
1021 memcpy(mgmt->da, da, ETH_ALEN);
1022 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1023 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1024 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1025 else
1026 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1027 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1028 IEEE80211_STYPE_ACTION);
1029
1030 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1031 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1032 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1033 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1034
1035 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1036 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1037 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1038
1039 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1040 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1041 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1042
1043 ieee80211_sta_tx(dev, skb, 0);
1044
1045 return;
1046}
1047
eadc8d9e
RR		 1048void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1049 u16 tid, u8 dialog_token, u16 start_seq_num,
1050 u16 agg_size, u16 timeout)
1051{
1052 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1053 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1054 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1055 struct sk_buff *skb;
1056 struct ieee80211_mgmt *mgmt;
1057 u16 capab;
1058
1059 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1060 sizeof(mgmt->u.action.u.addba_req));
1061
1062
1063 if (!skb) {
1064 printk(KERN_ERR "%s: failed to allocate buffer "
1065 "for addba request frame\n", dev->name);
1066 return;
1067 }
1068 skb_reserve(skb, local->hw.extra_tx_headroom);
1069 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1070 memset(mgmt, 0, 24);
1071 memcpy(mgmt->da, da, ETH_ALEN);
1072 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1073 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1074 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1075 else
1076 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1077
1078 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1079 IEEE80211_STYPE_ACTION);
1080
1081 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1082
1083 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1084 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1085
1086 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1087 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1088 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1089 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1090
1091 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1092
1093 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1094 mgmt->u.action.u.addba_req.start_seq_num =
1095 cpu_to_le16(start_seq_num << 4);
1096
1097 ieee80211_sta_tx(dev, skb, 0);
1098}
1099
9f985b0e
RR		 1100static void ieee80211_sta_process_addba_request(struct net_device *dev,
1101 struct ieee80211_mgmt *mgmt,
1102 size_t len)
1103{
1104 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1105 struct ieee80211_hw *hw = &local->hw;
1106 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1107 struct sta_info *sta;
07db2183
RR		 1108 struct tid_ampdu_rx *tid_agg_rx;
1109 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1110 u8 dialog_token;
07db2183
RR		 1111 int ret = -EOPNOTSUPP;
1112 DECLARE_MAC_BUF(mac);
9f985b0e
RR		 1113
1114 sta = sta_info_get(local, mgmt->sa);
1115 if (!sta)
1116 return;
1117
1118 /* extract session parameters from addba request frame */
1119 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1120 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1121 start_seq_num =
1122 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1123
1124 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1125 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1126 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1127 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1128
9f985b0e
RR		 1129 status = WLAN_STATUS_REQUEST_DECLINED;
1130
07db2183
RR		 1131 /* sanity check for incoming parameters:
1132 * check if configuration can support the BA policy
1133 * and if buffer size does not exceeds max value */
1134 if (((ba_policy != 1)
1135 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1136 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1137 status = WLAN_STATUS_INVALID_QOS_PARAM;
1138#ifdef CONFIG_MAC80211_HT_DEBUG
1139 if (net_ratelimit())
1140 printk(KERN_DEBUG "Block Ack Req with bad params from "
1141 "%s on tid %u. policy %d, buffer size %d\n",
1142 print_mac(mac, mgmt->sa), tid, ba_policy,
1143 buf_size);
1144#endif /* CONFIG_MAC80211_HT_DEBUG */
1145 goto end_no_lock;
1146 }
1147 /* determine default buffer size */
1148 if (buf_size == 0) {
1149 struct ieee80211_hw_mode *mode = conf->mode;
1150 buf_size = IEEE80211_MIN_AMPDU_BUF;
1151 buf_size = buf_size << mode->ht_info.ampdu_factor;
1152 }
1153
1154 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1155
1156 /* examine state machine */
1157 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1158
1159 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1160#ifdef CONFIG_MAC80211_HT_DEBUG
1161 if (net_ratelimit())
1162 printk(KERN_DEBUG "unexpected Block Ack Req from "
1163 "%s on tid %u\n",
1164 print_mac(mac, mgmt->sa), tid);
1165#endif /* CONFIG_MAC80211_HT_DEBUG */
1166 goto end;
1167 }
1168
1169 /* prepare reordering buffer */
1170 tid_agg_rx->reorder_buf =
1171 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1172 if (!tid_agg_rx->reorder_buf) {
1173 if (net_ratelimit())
1174 printk(KERN_ERR "can not allocate reordering buffer "
1175 "to tid %d\n", tid);
07db2183
RR		 1176 goto end;
1177 }
1178 memset(tid_agg_rx->reorder_buf, 0,
1179 buf_size * sizeof(struct sk_buf *));
1180
1181 if (local->ops->ampdu_action)
1182 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1183 sta->addr, tid, &start_seq_num);
07db2183
RR		 1184#ifdef CONFIG_MAC80211_HT_DEBUG
1185 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1186#endif /* CONFIG_MAC80211_HT_DEBUG */
1187
1188 if (ret) {
1189 kfree(tid_agg_rx->reorder_buf);
1190 goto end;
1191 }
1192
1193 /* change state and send addba resp */
1194 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1195 tid_agg_rx->dialog_token = dialog_token;
1196 tid_agg_rx->ssn = start_seq_num;
1197 tid_agg_rx->head_seq_num = start_seq_num;
1198 tid_agg_rx->buf_size = buf_size;
1199 tid_agg_rx->timeout = timeout;
1200 tid_agg_rx->stored_mpdu_num = 0;
1201 status = WLAN_STATUS_SUCCESS;
1202end:
1203 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1204
1205end_no_lock:
9f985b0e
RR		 1206 ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
1207 status, 1, buf_size, timeout);
1208 sta_info_put(sta);
1209}
f0706e82 1210
eadc8d9e
RR		 1211static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1212 struct ieee80211_mgmt *mgmt,
1213 size_t len)
1214{
1215 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1216 struct ieee80211_hw *hw = &local->hw;
1217 struct sta_info *sta;
1218 u16 capab;
1219 u16 tid;
1220 u8 *state;
1221
1222 sta = sta_info_get(local, mgmt->sa);
1223 if (!sta)
1224 return;
1225
1226 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1227 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1228
1229 state = &sta->ampdu_mlme.tid_tx[tid].state;
1230
1231 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1232
1233 if (mgmt->u.action.u.addba_resp.dialog_token !=
1234 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1235 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1236#ifdef CONFIG_MAC80211_HT_DEBUG
1237 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1238#endif /* CONFIG_MAC80211_HT_DEBUG */
1239 sta_info_put(sta);
1240 return;
1241 }
1242
1243 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1244#ifdef CONFIG_MAC80211_HT_DEBUG
1245 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1246#endif /* CONFIG_MAC80211_HT_DEBUG */
1247 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1248 == WLAN_STATUS_SUCCESS) {
1249 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1250 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1251 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1252 "%d\n", *state);
1253 sta_info_put(sta);
1254 return;
1255 }
1256
1257 if (*state & HT_ADDBA_RECEIVED_MSK)
1258 printk(KERN_DEBUG "double addBA response\n");
1259
1260 *state |= HT_ADDBA_RECEIVED_MSK;
1261 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1262
1263 if (*state == HT_AGG_STATE_OPERATIONAL) {
1264 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1265 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1266 }
1267
1268 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1269 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1270 } else {
1271 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1272
1273 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1274 /* this will allow the state check in stop_BA_session */
1275 *state = HT_AGG_STATE_OPERATIONAL;
1276 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1277 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1278 WLAN_BACK_INITIATOR);
1279 }
1280 sta_info_put(sta);
1281}
1282
1283void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1284 u16 initiator, u16 reason_code)
07db2183
RR		 1285{
1286 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1287 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1288 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1289 struct sk_buff *skb;
1290 struct ieee80211_mgmt *mgmt;
1291 u16 params;
1292
1293 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1294 sizeof(mgmt->u.action.u.delba));
1295
1296 if (!skb) {
1297 printk(KERN_ERR "%s: failed to allocate buffer "
1298 "for delba frame\n", dev->name);
1299 return;
1300 }
1301
1302 skb_reserve(skb, local->hw.extra_tx_headroom);
1303 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1304 memset(mgmt, 0, 24);
1305 memcpy(mgmt->da, da, ETH_ALEN);
1306 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1307 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1308 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1309 else
1310 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1311 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1312 IEEE80211_STYPE_ACTION);
1313
1314 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1315
1316 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1317 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1318 params = (u16)(initiator << 11); /* bit 11 initiator */
1319 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1320
1321 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1322 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1323
1324 ieee80211_sta_tx(dev, skb, 0);
1325}
1326
1327void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1328 u16 initiator, u16 reason)
1329{
1330 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1331 struct ieee80211_hw *hw = &local->hw;
1332 struct sta_info *sta;
b580781e 1333 int ret, i;
07db2183
RR		 1334
1335 sta = sta_info_get(local, ra);
1336 if (!sta)
1337 return;
1338
1339 /* check if TID is in operational state */
1340 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1341 if (sta->ampdu_mlme.tid_rx[tid].state
1342 != HT_AGG_STATE_OPERATIONAL) {
1343 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
07db2183
RR		 1344 sta_info_put(sta);
1345 return;
1346 }
1347 sta->ampdu_mlme.tid_rx[tid].state =
1348 HT_AGG_STATE_REQ_STOP_BA_MSK |
1349 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1350 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1351
1352 /* stop HW Rx aggregation. ampdu_action existence
1353 * already verified in session init so we add the BUG_ON */
1354 BUG_ON(!local->ops->ampdu_action);
1355
1356 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1357 ra, tid, NULL);
07db2183
RR		 1358 if (ret)
1359 printk(KERN_DEBUG "HW problem - can not stop rx "
1360 "aggergation for tid %d\n", tid);
1361
1362 /* shutdown timer has not expired */
1363 if (initiator != WLAN_BACK_TIMER)
1364 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1365 session_timer);
1366
1367 /* check if this is a self generated aggregation halt */
1368 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1369 ieee80211_send_delba(dev, ra, tid, 0, reason);
1370
1371 /* free the reordering buffer */
b580781e
RR		 1372 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1373 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1374 /* release the reordered frames */
1375 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1376 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1377 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1378 }
1379 }
07db2183
RR		 1380 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1381
1382 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
1383 sta_info_put(sta);
1384}
1385
eadc8d9e 1386
688b88a4
RR		 1387static void ieee80211_sta_process_delba(struct net_device *dev,
1388 struct ieee80211_mgmt *mgmt, size_t len)
1389{
1390 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1391 struct sta_info *sta;
1392 u16 tid, params;
1393 u16 initiator;
1394 DECLARE_MAC_BUF(mac);
1395
1396 sta = sta_info_get(local, mgmt->sa);
1397 if (!sta)
1398 return;
1399
1400 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1401 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1402 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1403
1404#ifdef CONFIG_MAC80211_HT_DEBUG
1405 if (net_ratelimit())
d92684e6
RR		 1406 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1407 print_mac(mac, mgmt->sa),
1408 initiator ? "recipient" : "initiator", tid,
688b88a4
RR		 1409 mgmt->u.action.u.delba.reason_code);
1410#endif /* CONFIG_MAC80211_HT_DEBUG */
1411
1412 if (initiator == WLAN_BACK_INITIATOR)
1413 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1414 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1415 else { /* WLAN_BACK_RECIPIENT */
1416 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1417 sta->ampdu_mlme.tid_tx[tid].state =
1418 HT_AGG_STATE_OPERATIONAL;
1419 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1420 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1421 WLAN_BACK_RECIPIENT);
1422 }
688b88a4
RR		 1423 sta_info_put(sta);
1424}
1425
eadc8d9e
RR		 1426/*
1427 * After sending add Block Ack request we activated a timer until
1428 * add Block Ack response will arrive from the recipient.
1429 * If this timer expires sta_addba_resp_timer_expired will be executed.
1430 */
1431void sta_addba_resp_timer_expired(unsigned long data)
1432{
1433 /* not an elegant detour, but there is no choice as the timer passes
1434 * only one argument, and both sta_info and TID are needed, so init
1435 * flow in sta_info_add gives the TID as data, while the timer_to_id
1436 * array gives the sta through container_of */
1437 u16 tid = *(int *)data;
1438 struct sta_info *temp_sta = container_of((void *)data,
1439 struct sta_info, timer_to_tid[tid]);
1440
1441 struct ieee80211_local *local = temp_sta->local;
1442 struct ieee80211_hw *hw = &local->hw;
1443 struct sta_info *sta;
1444 u8 *state;
1445
1446 sta = sta_info_get(local, temp_sta->addr);
1447 if (!sta)
1448 return;
1449
1450 state = &sta->ampdu_mlme.tid_tx[tid].state;
1451 /* check if the TID waits for addBA response */
1452 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1453 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1454 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1455 *state = HT_AGG_STATE_IDLE;
1456 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1457 "expecting addBA response there", tid);
1458 goto timer_expired_exit;
1459 }
1460
1461 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1462
1463 /* go through the state check in stop_BA_session */
1464 *state = HT_AGG_STATE_OPERATIONAL;
1465 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1466 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1467 WLAN_BACK_INITIATOR);
1468
1469timer_expired_exit:
1470 sta_info_put(sta);
1471}
1472
07db2183
RR		 1473/*
1474 * After receiving Block Ack Request (BAR) we activated a
1475 * timer after each frame arrives from the originator.
1476 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1477 */
1478void sta_rx_agg_session_timer_expired(unsigned long data)
1479{
1480 /* not an elegant detour, but there is no choice as the timer passes
1481 * only one argument, and verious sta_info are needed here, so init
1482 * flow in sta_info_add gives the TID as data, while the timer_to_id
1483 * array gives the sta through container_of */
1484 u8 *ptid = (u8 *)data;
1485 u8 *timer_to_id = ptid - *ptid;
1486 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1487 timer_to_tid[0]);
1488
1489 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1490 ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
1491 WLAN_BACK_TIMER,
1492 WLAN_REASON_QSTA_TIMEOUT);
1493}
1494
1495
f0706e82
JB		 1496static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1497 struct ieee80211_if_sta *ifsta,
1498 struct ieee80211_mgmt *mgmt,
1499 size_t len)
1500{
1501 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1502 u16 auth_alg, auth_transaction, status_code;
0795af57 1503 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1504
1505 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1506 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1507 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1508 "%s, but not in authenticate state - ignored\n",
1509 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1510 return;
1511 }
1512
1513 if (len < 24 + 6) {
1514 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1515 "received from %s - ignored\n",
1516 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1517 return;
1518 }
1519
51fb61e7 1520 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1521 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1522 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1523 "unknown AP (SA=%s BSSID=%s) - "
1524 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1525 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1526 return;
1527 }
1528
51fb61e7 1529 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1530 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1531 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1532 "unknown BSSID (SA=%s BSSID=%s) - "
1533 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1534 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1535 return;
1536 }
1537
1538 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1539 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1540 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1541
0795af57 1542 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1543 "transaction=%d status=%d)\n",
0795af57 1544 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1545 auth_transaction, status_code);
1546
51fb61e7 1547 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1548 /* IEEE 802.11 standard does not require authentication in IBSS
1549 * networks and most implementations do not seem to use it.
1550 * However, try to reply to authentication attempts if someone
1551 * has actually implemented this.
1552 * TODO: Could implement shared key authentication. */
1553 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1554 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1555 "frame (alg=%d transaction=%d)\n",
1556 dev->name, auth_alg, auth_transaction);
1557 return;
1558 }
1559 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1560 }
1561
1562 if (auth_alg != ifsta->auth_alg ||
1563 auth_transaction != ifsta->auth_transaction) {
1564 printk(KERN_DEBUG "%s: unexpected authentication frame "
1565 "(alg=%d transaction=%d)\n",
1566 dev->name, auth_alg, auth_transaction);
1567 return;
1568 }
1569
1570 if (status_code != WLAN_STATUS_SUCCESS) {
1571 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1572 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1573 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1574 u8 algs[3];
1575 const int num_algs = ARRAY_SIZE(algs);
1576 int i, pos;
1577 algs[0] = algs[1] = algs[2] = 0xff;
1578 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1579 algs[0] = WLAN_AUTH_OPEN;
1580 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1581 algs[1] = WLAN_AUTH_SHARED_KEY;
1582 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1583 algs[2] = WLAN_AUTH_LEAP;
1584 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1585 pos = 0;
1586 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1587 pos = 1;
1588 else
1589 pos = 2;
1590 for (i = 0; i < num_algs; i++) {
1591 pos++;
1592 if (pos >= num_algs)
1593 pos = 0;
1594 if (algs[pos] == ifsta->auth_alg ||
1595 algs[pos] == 0xff)
1596 continue;
1597 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1598 !ieee80211_sta_wep_configured(dev))
1599 continue;
1600 ifsta->auth_alg = algs[pos];
1601 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1602 "next try\n",
1603 dev->name, ifsta->auth_alg);
1604 break;
1605 }
1606 }
1607 return;
1608 }
1609
1610 switch (ifsta->auth_alg) {
1611 case WLAN_AUTH_OPEN:
1612 case WLAN_AUTH_LEAP:
1613 ieee80211_auth_completed(dev, ifsta);
1614 break;
1615 case WLAN_AUTH_SHARED_KEY:
1616 if (ifsta->auth_transaction == 4)
1617 ieee80211_auth_completed(dev, ifsta);
1618 else
1619 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1620 break;
1621 }
1622}
1623
1624
1625static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1626 struct ieee80211_if_sta *ifsta,
1627 struct ieee80211_mgmt *mgmt,
1628 size_t len)
1629{
1630 u16 reason_code;
0795af57 1631 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1632
1633 if (len < 24 + 2) {
1634 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1635 "received from %s - ignored\n",
1636 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1637 return;
1638 }
1639
1640 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1641 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1642 "unknown AP (SA=%s BSSID=%s) - "
1643 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1644 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1645 return;
1646 }
1647
1648 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1649
0795af57 1650 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1651 " (reason=%d)\n",
0795af57 1652 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1653
d6f2da5b 1654 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1655 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1656 }
1657
1658 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1659 ifsta->state == IEEE80211_ASSOCIATE ||
1660 ifsta->state == IEEE80211_ASSOCIATED) {
1661 ifsta->state = IEEE80211_AUTHENTICATE;
1662 mod_timer(&ifsta->timer, jiffies +
1663 IEEE80211_RETRY_AUTH_INTERVAL);
1664 }
1665
1666 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1667 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1668}
1669
1670
1671static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1672 struct ieee80211_if_sta *ifsta,
1673 struct ieee80211_mgmt *mgmt,
1674 size_t len)
1675{
1676 u16 reason_code;
0795af57 1677 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1678
1679 if (len < 24 + 2) {
1680 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1681 "received from %s - ignored\n",
1682 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1683 return;
1684 }
1685
1686 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1687 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1688 "unknown AP (SA=%s BSSID=%s) - "
1689 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1690 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1691 return;
1692 }
1693
1694 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1695
0795af57 1696 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1697 " (reason=%d)\n",
0795af57 1698 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1699
d6f2da5b 1700 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1701 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1702
1703 if (ifsta->state == IEEE80211_ASSOCIATED) {
1704 ifsta->state = IEEE80211_ASSOCIATE;
1705 mod_timer(&ifsta->timer, jiffies +
1706 IEEE80211_RETRY_AUTH_INTERVAL);
1707 }
1708
1709 ieee80211_set_disassoc(dev, ifsta, 0);
1710}
1711
1712
471b3efd 1713static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1714 struct ieee80211_if_sta *ifsta,
1715 struct ieee80211_mgmt *mgmt,
1716 size_t len,
1717 int reassoc)
1718{
471b3efd
JB		 1719 struct ieee80211_local *local = sdata->local;
1720 struct net_device *dev = sdata->dev;
f0706e82
JB		 1721 struct ieee80211_hw_mode *mode;
1722 struct sta_info *sta;
1723 u32 rates;
1724 u16 capab_info, status_code, aid;
1725 struct ieee802_11_elems elems;
471b3efd 1726 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1727 u8 *pos;
1728 int i, j;
0795af57 1729 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1730
1731 /* AssocResp and ReassocResp have identical structure, so process both
1732 * of them in this function. */
1733
1734 if (ifsta->state != IEEE80211_ASSOCIATE) {
1735 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1736 "%s, but not in associate state - ignored\n",
1737 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1738 return;
1739 }
1740
1741 if (len < 24 + 6) {
1742 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1743 "received from %s - ignored\n",
1744 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1745 return;
1746 }
1747
1748 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1749 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1750 "unknown AP (SA=%s BSSID=%s) - "
1751 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1752 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1753 return;
1754 }
1755
1756 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1757 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1758 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1759
0795af57 1760 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1761 "status=%d aid=%d)\n",
0795af57 1762 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1763 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1764
1765 if (status_code != WLAN_STATUS_SUCCESS) {
1766 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1767 dev->name, status_code);
8a69aa93
DD		 1768 /* if this was a reassociation, ensure we try a "full"
1769 * association next time. This works around some broken APs
1770 * which do not correctly reject reassociation requests. */
d6f2da5b 1771 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1772 return;
1773 }
1774
1dd84aa2
JB		 1775 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1776 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1777 "set\n", dev->name, aid);
1778 aid &= ~(BIT(15) | BIT(14));
1779
f0706e82 1780 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1781 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1782
1783 if (!elems.supp_rates) {
1784 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1785 dev->name);
1786 return;
1787 }
1788
1789 printk(KERN_DEBUG "%s: associated\n", dev->name);
1790 ifsta->aid = aid;
1791 ifsta->ap_capab = capab_info;
1792
1793 kfree(ifsta->assocresp_ies);
1794 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1795 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1796 if (ifsta->assocresp_ies)
1797 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1798
471b3efd
JB		 1799 /* set AID, ieee80211_set_associated() will tell the driver */
1800 bss_conf->aid = aid;
f0706e82
JB		 1801 ieee80211_set_associated(dev, ifsta, 1);
1802
1803 /* Add STA entry for the AP */
1804 sta = sta_info_get(local, ifsta->bssid);
1805 if (!sta) {
1806 struct ieee80211_sta_bss *bss;
0ec0b7ac 1807 sta = sta_info_add(local, dev, ifsta->bssid, GFP_KERNEL);
f0706e82
JB		 1808 if (!sta) {
1809 printk(KERN_DEBUG "%s: failed to add STA entry for the"
1810 " AP\n", dev->name);
1811 return;
1812 }
65c107ab 1813 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
cffdd30d
JL		 1814 local->hw.conf.channel,
1815 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1816 if (bss) {
1817 sta->last_rssi = bss->rssi;
1818 sta->last_signal = bss->signal;
1819 sta->last_noise = bss->noise;
1820 ieee80211_rx_bss_put(dev, bss);
1821 }
1822 }
1823
1824 sta->dev = dev;
c9ee23df 1825 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP;
f0706e82
JB		 1826
1827 rates = 0;
1828 mode = local->oper_hw_mode;
1829 for (i = 0; i < elems.supp_rates_len; i++) {
1830 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1831 for (j = 0; j < mode->num_rates; j++)
1832 if (mode->rates[j].rate == rate)
1833 rates |= BIT(j);
1834 }
1835 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1836 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 1837 for (j = 0; j < mode->num_rates; j++)
1838 if (mode->rates[j].rate == rate)
1839 rates |= BIT(j);
1840 }
1841 sta->supp_rates = rates;
1842
d3c990fb
RR		 1843 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1844 local->ops->conf_ht) {
1845 struct ieee80211_ht_bss_info bss_info;
1846
1847 ieee80211_ht_cap_ie_to_ht_info(
1848 (struct ieee80211_ht_cap *)
1849 elems.ht_cap_elem, &sta->ht_info);
1850 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1851 (struct ieee80211_ht_addt_info *)
1852 elems.ht_info_elem, &bss_info);
1853 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1854 }
1855
f0706e82
JB		 1856 rate_control_rate_init(sta, local);
1857
d6f2da5b 1858 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 1859 sta->flags |= WLAN_STA_WME;
1860 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1861 elems.wmm_param_len);
1862 }
1863
1864
1865 sta_info_put(sta);
1866
1867 ieee80211_associated(dev, ifsta);
1868}
1869
1870
1871/* Caller must hold local->sta_bss_lock */
1872static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1873 struct ieee80211_sta_bss *bss)
1874{
1875 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1876 bss->hnext = local->sta_bss_hash[STA_HASH(bss->bssid)];
1877 local->sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1878}
1879
1880
1881/* Caller must hold local->sta_bss_lock */
1882static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1883 struct ieee80211_sta_bss *bss)
1884{
1885 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1886 struct ieee80211_sta_bss *b, *prev = NULL;
1887 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1888 while (b) {
1889 if (b == bss) {
1890 if (!prev)
1891 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1892 bss->hnext;
1893 else
1894 prev->hnext = bss->hnext;
1895 break;
1896 }
1897 prev = b;
1898 b = b->hnext;
1899 }
1900}
1901
1902
1903static struct ieee80211_sta_bss *
cffdd30d
JL		 1904ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int channel,
1905 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1906{
1907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1908 struct ieee80211_sta_bss *bss;
1909
dd00cc48 1910 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1911 if (!bss)
1912 return NULL;
f0706e82
JB		 1913 atomic_inc(&bss->users);
1914 atomic_inc(&bss->users);
1915 memcpy(bss->bssid, bssid, ETH_ALEN);
65c107ab 1916 bss->channel = channel;
cffdd30d
JL		 1917 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
1918 memcpy(bss->ssid, ssid, ssid_len);
1919 bss->ssid_len = ssid_len;
1920 }
f0706e82
JB		 1921
1922 spin_lock_bh(&local->sta_bss_lock);
1923 /* TODO: order by RSSI? */
1924 list_add_tail(&bss->list, &local->sta_bss_list);
1925 __ieee80211_rx_bss_hash_add(dev, bss);
1926 spin_unlock_bh(&local->sta_bss_lock);
1927 return bss;
1928}
1929
1930
1931static struct ieee80211_sta_bss *
cffdd30d
JL		 1932ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int channel,
1933 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1934{
1935 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1936 struct ieee80211_sta_bss *bss;
1937
1938 spin_lock_bh(&local->sta_bss_lock);
1939 bss = local->sta_bss_hash[STA_HASH(bssid)];
1940 while (bss) {
cffdd30d
JL		 1941 if (!memcmp(bss->bssid, bssid, ETH_ALEN) &&
1942 bss->channel == channel &&
1943 bss->ssid_len == ssid_len &&
1944 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 1945 atomic_inc(&bss->users);
1946 break;
1947 }
1948 bss = bss->hnext;
1949 }
1950 spin_unlock_bh(&local->sta_bss_lock);
1951 return bss;
1952}
1953
1954
1955static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
1956{
1957 kfree(bss->wpa_ie);
1958 kfree(bss->rsn_ie);
1959 kfree(bss->wmm_ie);
c7153508 1960 kfree(bss->ht_ie);
f0706e82
JB		 1961 kfree(bss);
1962}
1963
1964
1965static void ieee80211_rx_bss_put(struct net_device *dev,
1966 struct ieee80211_sta_bss *bss)
1967{
1968 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1969 if (!atomic_dec_and_test(&bss->users))
1970 return;
1971
1972 spin_lock_bh(&local->sta_bss_lock);
1973 __ieee80211_rx_bss_hash_del(dev, bss);
1974 list_del(&bss->list);
1975 spin_unlock_bh(&local->sta_bss_lock);
1976 ieee80211_rx_bss_free(bss);
1977}
1978
1979
1980void ieee80211_rx_bss_list_init(struct net_device *dev)
1981{
1982 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1983 spin_lock_init(&local->sta_bss_lock);
1984 INIT_LIST_HEAD(&local->sta_bss_list);
1985}
1986
1987
1988void ieee80211_rx_bss_list_deinit(struct net_device *dev)
1989{
1990 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1991 struct ieee80211_sta_bss *bss, *tmp;
1992
1993 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
1994 ieee80211_rx_bss_put(dev, bss);
1995}
1996
1997
1998static void ieee80211_rx_bss_info(struct net_device *dev,
1999 struct ieee80211_mgmt *mgmt,
2000 size_t len,
2001 struct ieee80211_rx_status *rx_status,
2002 int beacon)
2003{
2004 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2005 struct ieee802_11_elems elems;
2006 size_t baselen;
67a4cce4 2007 int channel, clen;
f0706e82
JB		 2008 struct ieee80211_sta_bss *bss;
2009 struct sta_info *sta;
2010 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2011 u64 timestamp;
0795af57
JP		 2012 DECLARE_MAC_BUF(mac);
2013 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2014
2015 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2016 return; /* ignore ProbeResp to foreign address */
2017
2018#if 0
0795af57 2019 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2020 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2021 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2022#endif
2023
2024 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2025 if (baselen > len)
2026 return;
2027
2028 timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2029
51fb61e7 2030 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
f0706e82
JB		 2031 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2032#ifdef CONFIG_MAC80211_IBSS_DEBUG
2033 static unsigned long last_tsf_debug = 0;
2034 u64 tsf;
2035 if (local->ops->get_tsf)
2036 tsf = local->ops->get_tsf(local_to_hw(local));
2037 else
2038 tsf = -1LLU;
2039 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
0795af57
JP		 2040 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2041 "%s TSF=0x%llx BCN=0x%llx diff=%lld "
f0706e82 2042 "@%lu\n",
0795af57 2043 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->bssid),
f0706e82
JB		 2044 (unsigned long long)tsf,
2045 (unsigned long long)timestamp,
2046 (unsigned long long)(tsf - timestamp),
2047 jiffies);
2048 last_tsf_debug = jiffies;
2049 }
2050#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2051 }
2052
67a4cce4 2053 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2054
51fb61e7 2055 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2056 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2057 (sta = sta_info_get(local, mgmt->sa))) {
2058 struct ieee80211_hw_mode *mode;
2059 struct ieee80211_rate *rates;
2060 size_t num_rates;
2061 u32 supp_rates, prev_rates;
2062 int i, j;
2063
ece8eddd 2064 mode = local->sta_sw_scanning ?
f0706e82 2065 local->scan_hw_mode : local->oper_hw_mode;
ece8eddd
ZY		 2066
2067 if (local->sta_hw_scanning) {
2068 /* search for the correct mode matches the beacon */
2069 list_for_each_entry(mode, &local->modes_list, list)
2070 if (mode->mode == rx_status->phymode)
2071 break;
2072
2073 if (mode == NULL)
2074 mode = local->oper_hw_mode;
2075 }
f0706e82
JB		 2076 rates = mode->rates;
2077 num_rates = mode->num_rates;
2078
2079 supp_rates = 0;
2080 for (i = 0; i < elems.supp_rates_len +
2081 elems.ext_supp_rates_len; i++) {
2082 u8 rate = 0;
2083 int own_rate;
2084 if (i < elems.supp_rates_len)
2085 rate = elems.supp_rates[i];
2086 else if (elems.ext_supp_rates)
2087 rate = elems.ext_supp_rates
2088 [i - elems.supp_rates_len];
2089 own_rate = 5 * (rate & 0x7f);
f0706e82
JB		 2090 for (j = 0; j < num_rates; j++)
2091 if (rates[j].rate == own_rate)
2092 supp_rates |= BIT(j);
2093 }
2094
2095 prev_rates = sta->supp_rates;
2096 sta->supp_rates &= supp_rates;
2097 if (sta->supp_rates == 0) {
2098 /* No matching rates - this should not really happen.
2099 * Make sure that at least one rate is marked
2100 * supported to avoid issues with TX rate ctrl. */
2101 sta->supp_rates = sdata->u.sta.supp_rates_bits;
2102 }
2103 if (sta->supp_rates != prev_rates) {
2104 printk(KERN_DEBUG "%s: updated supp_rates set for "
0795af57 2105 "%s based on beacon info (0x%x & 0x%x -> "
f0706e82 2106 "0x%x)\n",
0795af57 2107 dev->name, print_mac(mac, sta->addr), prev_rates,
f0706e82
JB		 2108 supp_rates, sta->supp_rates);
2109 }
2110 sta_info_put(sta);
2111 }
2112
2113 if (!elems.ssid)
2114 return;
2115
2116 if (elems.ds_params && elems.ds_params_len == 1)
2117 channel = elems.ds_params[0];
2118 else
2119 channel = rx_status->channel;
2120
cffdd30d
JL		 2121 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, channel,
2122 elems.ssid, elems.ssid_len);
f0706e82 2123 if (!bss) {
cffdd30d
JL		 2124 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, channel,
2125 elems.ssid, elems.ssid_len);
f0706e82
JB		 2126 if (!bss)
2127 return;
2128 } else {
2129#if 0
2130 /* TODO: order by RSSI? */
2131 spin_lock_bh(&local->sta_bss_lock);
2132 list_move_tail(&bss->list, &local->sta_bss_list);
2133 spin_unlock_bh(&local->sta_bss_lock);
2134#endif
2135 }
2136
2137 if (bss->probe_resp && beacon) {
2138 /* Do not allow beacon to override data from Probe Response. */
2139 ieee80211_rx_bss_put(dev, bss);
2140 return;
2141 }
2142
5628221c
DD		 2143 /* save the ERP value so that it is available at association time */
2144 if (elems.erp_info && elems.erp_info_len >= 1) {
2145 bss->erp_value = elems.erp_info[0];
2146 bss->has_erp_value = 1;
2147 }
2148
f0706e82
JB		 2149 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2150 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2151
2152 bss->supp_rates_len = 0;
2153 if (elems.supp_rates) {
2154 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2155 if (clen > elems.supp_rates_len)
2156 clen = elems.supp_rates_len;
2157 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2158 clen);
2159 bss->supp_rates_len += clen;
2160 }
2161 if (elems.ext_supp_rates) {
2162 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2163 if (clen > elems.ext_supp_rates_len)
2164 clen = elems.ext_supp_rates_len;
2165 memcpy(&bss->supp_rates[bss->supp_rates_len],
2166 elems.ext_supp_rates, clen);
2167 bss->supp_rates_len += clen;
2168 }
2169
2170 if (elems.wpa &&
2171 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2172 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2173 kfree(bss->wpa_ie);
2174 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2175 if (bss->wpa_ie) {
2176 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2177 bss->wpa_ie_len = elems.wpa_len + 2;
2178 } else
2179 bss->wpa_ie_len = 0;
2180 } else if (!elems.wpa && bss->wpa_ie) {
2181 kfree(bss->wpa_ie);
2182 bss->wpa_ie = NULL;
2183 bss->wpa_ie_len = 0;
2184 }
2185
2186 if (elems.rsn &&
2187 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2188 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2189 kfree(bss->rsn_ie);
2190 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2191 if (bss->rsn_ie) {
2192 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2193 bss->rsn_ie_len = elems.rsn_len + 2;
2194 } else
2195 bss->rsn_ie_len = 0;
2196 } else if (!elems.rsn && bss->rsn_ie) {
2197 kfree(bss->rsn_ie);
2198 bss->rsn_ie = NULL;
2199 bss->rsn_ie_len = 0;
2200 }
2201
2202 if (elems.wmm_param &&
2203 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2204 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2205 kfree(bss->wmm_ie);
2206 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2207 if (bss->wmm_ie) {
2208 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2209 elems.wmm_param_len + 2);
2210 bss->wmm_ie_len = elems.wmm_param_len + 2;
2211 } else
2212 bss->wmm_ie_len = 0;
2213 } else if (!elems.wmm_param && bss->wmm_ie) {
2214 kfree(bss->wmm_ie);
2215 bss->wmm_ie = NULL;
2216 bss->wmm_ie_len = 0;
2217 }
c7153508
RR		 2218 if (elems.ht_cap_elem &&
2219 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2220 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2221 kfree(bss->ht_ie);
2222 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2223 if (bss->ht_ie) {
2224 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2225 elems.ht_cap_elem_len + 2);
2226 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2227 } else
2228 bss->ht_ie_len = 0;
2229 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2230 kfree(bss->ht_ie);
2231 bss->ht_ie = NULL;
2232 bss->ht_ie_len = 0;
2233 }
f0706e82
JB		 2234
2235 bss->hw_mode = rx_status->phymode;
f0706e82
JB		 2236 bss->freq = rx_status->freq;
2237 if (channel != rx_status->channel &&
2238 (bss->hw_mode == MODE_IEEE80211G ||
2239 bss->hw_mode == MODE_IEEE80211B) &&
2240 channel >= 1 && channel <= 14) {
2241 static const int freq_list[] = {
2242 2412, 2417, 2422, 2427, 2432, 2437, 2442,
2243 2447, 2452, 2457, 2462, 2467, 2472, 2484
2244 };
2245 /* IEEE 802.11g/b mode can receive packets from neighboring
2246 * channels, so map the channel into frequency. */
2247 bss->freq = freq_list[channel - 1];
2248 }
2249 bss->timestamp = timestamp;
2250 bss->last_update = jiffies;
2251 bss->rssi = rx_status->ssi;
2252 bss->signal = rx_status->signal;
2253 bss->noise = rx_status->noise;
2254 if (!beacon)
2255 bss->probe_resp++;
2256 ieee80211_rx_bss_put(dev, bss);
2257}
2258
2259
2260static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2261 struct ieee80211_mgmt *mgmt,
2262 size_t len,
2263 struct ieee80211_rx_status *rx_status)
2264{
2265 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2266}
2267
2268
2269static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2270 struct ieee80211_mgmt *mgmt,
2271 size_t len,
2272 struct ieee80211_rx_status *rx_status)
2273{
f0706e82
JB		 2274 struct ieee80211_sub_if_data *sdata;
2275 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2276 size_t baselen;
2277 struct ieee802_11_elems elems;
d3c990fb
RR		 2278 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2279 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2280 u32 changed = 0;
f0706e82
JB		 2281
2282 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2283
2284 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2285 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2286 return;
2287 ifsta = &sdata->u.sta;
2288
d6f2da5b 2289 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2290 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2291 return;
2292
2293 /* Process beacon from the current BSS */
2294 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2295 if (baselen > len)
2296 return;
2297
67a4cce4 2298 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2299
5628221c 2300 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2301 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
f0706e82 2302
d3c990fb
RR		 2303 if (elems.ht_cap_elem && elems.ht_info_elem &&
2304 elems.wmm_param && local->ops->conf_ht &&
2305 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2306 struct ieee80211_ht_bss_info bss_info;
2307
2308 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2309 (struct ieee80211_ht_addt_info *)
2310 elems.ht_info_elem, &bss_info);
2311 /* check if AP changed bss inforamation */
2312 if ((conf->ht_bss_conf.primary_channel !=
2313 bss_info.primary_channel) ||
2314 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2315 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2316 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2317 &bss_info);
2318 }
2319
d6f2da5b 2320 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2321 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2322 elems.wmm_param_len);
2323 }
471b3efd
JB		 2324
2325 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2326}
2327
2328
2329static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2330 struct ieee80211_if_sta *ifsta,
2331 struct ieee80211_mgmt *mgmt,
2332 size_t len,
2333 struct ieee80211_rx_status *rx_status)
2334{
2335 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2336 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2337 int tx_last_beacon;
2338 struct sk_buff *skb;
2339 struct ieee80211_mgmt *resp;
2340 u8 *pos, *end;
0795af57
JP		 2341 DECLARE_MAC_BUF(mac);
2342#ifdef CONFIG_MAC80211_IBSS_DEBUG
2343 DECLARE_MAC_BUF(mac2);
2344 DECLARE_MAC_BUF(mac3);
2345#endif
f0706e82 2346
51fb61e7 2347 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2348 ifsta->state != IEEE80211_IBSS_JOINED ||
2349 len < 24 + 2 || !ifsta->probe_resp)
2350 return;
2351
2352 if (local->ops->tx_last_beacon)
2353 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2354 else
2355 tx_last_beacon = 1;
2356
2357#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2358 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2359 "%s (tx_last_beacon=%d)\n",
2360 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2361 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2362#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2363
2364 if (!tx_last_beacon)
2365 return;
2366
2367 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2368 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2369 return;
2370
2371 end = ((u8 *) mgmt) + len;
2372 pos = mgmt->u.probe_req.variable;
2373 if (pos[0] != WLAN_EID_SSID ||
2374 pos + 2 + pos[1] > end) {
2375 if (net_ratelimit()) {
2376 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2377 "from %s\n",
2378 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2379 }
2380 return;
2381 }
2382 if (pos[1] != 0 &&
2383 (pos[1] != ifsta->ssid_len ||
2384 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2385 /* Ignore ProbeReq for foreign SSID */
2386 return;
2387 }
2388
2389 /* Reply with ProbeResp */
0ec0b7ac 2390 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2391 if (!skb)
2392 return;
2393
2394 resp = (struct ieee80211_mgmt *) skb->data;
2395 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2396#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2397 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2398 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2399#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2400 ieee80211_sta_tx(dev, skb, 0);
2401}
2402
4e20cb29
JB		 2403static void ieee80211_rx_mgmt_action(struct net_device *dev,
2404 struct ieee80211_if_sta *ifsta,
2405 struct ieee80211_mgmt *mgmt,
2406 size_t len)
9f985b0e
RR		 2407{
2408 if (len < IEEE80211_MIN_ACTION_SIZE)
2409 return;
2410
2411 switch (mgmt->u.action.category) {
2412 case WLAN_CATEGORY_BACK:
2413 switch (mgmt->u.action.u.addba_req.action_code) {
2414 case WLAN_ACTION_ADDBA_REQ:
2415 if (len < (IEEE80211_MIN_ACTION_SIZE +
2416 sizeof(mgmt->u.action.u.addba_req)))
2417 break;
2418 ieee80211_sta_process_addba_request(dev, mgmt, len);
2419 break;
eadc8d9e
RR		 2420 case WLAN_ACTION_ADDBA_RESP:
2421 if (len < (IEEE80211_MIN_ACTION_SIZE +
2422 sizeof(mgmt->u.action.u.addba_resp)))
2423 break;
2424 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2425 break;
688b88a4
RR		 2426 case WLAN_ACTION_DELBA:
2427 if (len < (IEEE80211_MIN_ACTION_SIZE +
2428 sizeof(mgmt->u.action.u.delba)))
2429 break;
2430 ieee80211_sta_process_delba(dev, mgmt, len);
2431 break;
9f985b0e
RR		 2432 default:
2433 if (net_ratelimit())
688b88a4 2434 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2435 dev->name);
2436 break;
2437 }
2438 break;
2439 default:
2440 break;
2441 }
2442}
f0706e82
JB		 2443
2444void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2445 struct ieee80211_rx_status *rx_status)
2446{
2447 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2448 struct ieee80211_sub_if_data *sdata;
2449 struct ieee80211_if_sta *ifsta;
2450 struct ieee80211_mgmt *mgmt;
2451 u16 fc;
2452
2453 if (skb->len < 24)
2454 goto fail;
2455
2456 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2457 ifsta = &sdata->u.sta;
2458
2459 mgmt = (struct ieee80211_mgmt *) skb->data;
2460 fc = le16_to_cpu(mgmt->frame_control);
2461
2462 switch (fc & IEEE80211_FCTL_STYPE) {
2463 case IEEE80211_STYPE_PROBE_REQ:
2464 case IEEE80211_STYPE_PROBE_RESP:
2465 case IEEE80211_STYPE_BEACON:
2466 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2467 case IEEE80211_STYPE_AUTH:
2468 case IEEE80211_STYPE_ASSOC_RESP:
2469 case IEEE80211_STYPE_REASSOC_RESP:
2470 case IEEE80211_STYPE_DEAUTH:
2471 case IEEE80211_STYPE_DISASSOC:
9f985b0e 2472 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2473 skb_queue_tail(&ifsta->skb_queue, skb);
2474 queue_work(local->hw.workqueue, &ifsta->work);
2475 return;
2476 default:
2477 printk(KERN_DEBUG "%s: received unknown management frame - "
2478 "stype=%d\n", dev->name,
2479 (fc & IEEE80211_FCTL_STYPE) >> 4);
2480 break;
2481 }
2482
2483 fail:
2484 kfree_skb(skb);
2485}
2486
2487
2488static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2489 struct sk_buff *skb)
2490{
2491 struct ieee80211_rx_status *rx_status;
2492 struct ieee80211_sub_if_data *sdata;
2493 struct ieee80211_if_sta *ifsta;
2494 struct ieee80211_mgmt *mgmt;
2495 u16 fc;
2496
2497 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2498 ifsta = &sdata->u.sta;
2499
2500 rx_status = (struct ieee80211_rx_status *) skb->cb;
2501 mgmt = (struct ieee80211_mgmt *) skb->data;
2502 fc = le16_to_cpu(mgmt->frame_control);
2503
2504 switch (fc & IEEE80211_FCTL_STYPE) {
2505 case IEEE80211_STYPE_PROBE_REQ:
2506 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2507 rx_status);
2508 break;
2509 case IEEE80211_STYPE_PROBE_RESP:
2510 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2511 break;
2512 case IEEE80211_STYPE_BEACON:
2513 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2514 break;
2515 case IEEE80211_STYPE_AUTH:
2516 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2517 break;
2518 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2519 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2520 break;
2521 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2522 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2523 break;
2524 case IEEE80211_STYPE_DEAUTH:
2525 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2526 break;
2527 case IEEE80211_STYPE_DISASSOC:
2528 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2529 break;
9f985b0e
RR		 2530 case IEEE80211_STYPE_ACTION:
2531 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len);
2532 break;
f0706e82
JB		 2533 }
2534
2535 kfree_skb(skb);
2536}
2537
2538
ece8eddd
ZY		 2539ieee80211_txrx_result
2540ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2541 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2542{
2543 struct ieee80211_mgmt *mgmt;
2544 u16 fc;
2545
ece8eddd
ZY		 2546 if (skb->len < 2)
2547 return TXRX_DROP;
f0706e82
JB		 2548
2549 mgmt = (struct ieee80211_mgmt *) skb->data;
2550 fc = le16_to_cpu(mgmt->frame_control);
2551
ece8eddd
ZY		 2552 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
2553 return TXRX_CONTINUE;
2554
2555 if (skb->len < 24)
2556 return TXRX_DROP;
2557
f0706e82
JB		 2558 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2559 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2560 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2561 skb->len, rx_status);
ece8eddd
ZY		 2562 dev_kfree_skb(skb);
2563 return TXRX_QUEUED;
f0706e82
JB		 2564 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2565 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2566 rx_status);
ece8eddd
ZY		 2567 dev_kfree_skb(skb);
2568 return TXRX_QUEUED;
f0706e82
JB		 2569 }
2570 }
ece8eddd 2571 return TXRX_CONTINUE;
f0706e82
JB		 2572}
2573
2574
2575static int ieee80211_sta_active_ibss(struct net_device *dev)
2576{
2577 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2578 int active = 0;
2579 struct sta_info *sta;
2580
be8755e1 2581 read_lock_bh(&local->sta_lock);
f0706e82
JB		 2582 list_for_each_entry(sta, &local->sta_list, list) {
2583 if (sta->dev == dev &&
2584 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2585 jiffies)) {
2586 active++;
2587 break;
2588 }
2589 }
be8755e1 2590 read_unlock_bh(&local->sta_lock);
f0706e82
JB		 2591
2592 return active;
2593}
2594
2595
2596static void ieee80211_sta_expire(struct net_device *dev)
2597{
2598 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2599 struct sta_info *sta, *tmp;
be8755e1 2600 LIST_HEAD(tmp_list);
0795af57 2601 DECLARE_MAC_BUF(mac);
f0706e82 2602
be8755e1 2603 write_lock_bh(&local->sta_lock);
f0706e82
JB		 2604 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
2605 if (time_after(jiffies, sta->last_rx +
2606 IEEE80211_IBSS_INACTIVITY_LIMIT)) {
0795af57
JP		 2607 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2608 dev->name, print_mac(mac, sta->addr));
be8755e1
MW		 2609 __sta_info_get(sta);
2610 sta_info_remove(sta);
2611 list_add(&sta->list, &tmp_list);
f0706e82 2612 }
be8755e1
MW		 2613 write_unlock_bh(&local->sta_lock);
2614
2615 list_for_each_entry_safe(sta, tmp, &tmp_list, list) {
2616 sta_info_free(sta);
2617 sta_info_put(sta);
2618 }
f0706e82
JB		 2619}
2620
2621
2622static void ieee80211_sta_merge_ibss(struct net_device *dev,
2623 struct ieee80211_if_sta *ifsta)
2624{
2625 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2626
2627 ieee80211_sta_expire(dev);
2628 if (ieee80211_sta_active_ibss(dev))
2629 return;
2630
2631 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
2632 "IBSS networks with same SSID (merge)\n", dev->name);
2633 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
2634}
2635
2636
2637void ieee80211_sta_timer(unsigned long data)
2638{
2639 struct ieee80211_sub_if_data *sdata =
2640 (struct ieee80211_sub_if_data *) data;
2641 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
2642 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
2643
2644 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2645 queue_work(local->hw.workqueue, &ifsta->work);
2646}
2647
2648
2649void ieee80211_sta_work(struct work_struct *work)
2650{
2651 struct ieee80211_sub_if_data *sdata =
2652 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
2653 struct net_device *dev = sdata->dev;
2654 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2655 struct ieee80211_if_sta *ifsta;
2656 struct sk_buff *skb;
2657
2658 if (!netif_running(dev))
2659 return;
2660
ece8eddd 2661 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 2662 return;
2663
51fb61e7
JB		 2664 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
2665 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 2666 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 2667 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 2668 return;
2669 }
2670 ifsta = &sdata->u.sta;
2671
2672 while ((skb = skb_dequeue(&ifsta->skb_queue)))
2673 ieee80211_sta_rx_queued_mgmt(dev, skb);
2674
2675 if (ifsta->state != IEEE80211_AUTHENTICATE &&
2676 ifsta->state != IEEE80211_ASSOCIATE &&
2677 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 2678 if (ifsta->scan_ssid_len)
2679 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
2680 else
2681 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 2682 return;
2683 }
2684
2685 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
2686 if (ieee80211_sta_config_auth(dev, ifsta))
2687 return;
2688 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
2689 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
2690 return;
2691
2692 switch (ifsta->state) {
2693 case IEEE80211_DISABLED:
2694 break;
2695 case IEEE80211_AUTHENTICATE:
2696 ieee80211_authenticate(dev, ifsta);
2697 break;
2698 case IEEE80211_ASSOCIATE:
2699 ieee80211_associate(dev, ifsta);
2700 break;
2701 case IEEE80211_ASSOCIATED:
2702 ieee80211_associated(dev, ifsta);
2703 break;
2704 case IEEE80211_IBSS_SEARCH:
2705 ieee80211_sta_find_ibss(dev, ifsta);
2706 break;
2707 case IEEE80211_IBSS_JOINED:
2708 ieee80211_sta_merge_ibss(dev, ifsta);
2709 break;
2710 default:
2711 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
2712 ifsta->state);
2713 break;
2714 }
2715
2716 if (ieee80211_privacy_mismatch(dev, ifsta)) {
2717 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
2718 "mixed-cell disabled - disassociate\n", dev->name);
2719
2720 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
2721 ieee80211_set_disassoc(dev, ifsta, 0);
2722 }
2723}
2724
2725
2726static void ieee80211_sta_reset_auth(struct net_device *dev,
2727 struct ieee80211_if_sta *ifsta)
2728{
2729 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2730
2731 if (local->ops->reset_tsf) {
2732 /* Reset own TSF to allow time synchronization work. */
2733 local->ops->reset_tsf(local_to_hw(local));
2734 }
2735
2736 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
2737
2738
2739 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
2740 ifsta->auth_alg = WLAN_AUTH_OPEN;
2741 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
2742 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
2743 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
2744 ifsta->auth_alg = WLAN_AUTH_LEAP;
2745 else
2746 ifsta->auth_alg = WLAN_AUTH_OPEN;
2747 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
2748 ifsta->auth_alg);
2749 ifsta->auth_transaction = -1;
d6f2da5b
JS		 2750 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
2751 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 2752 netif_carrier_off(dev);
2753}
2754
2755
2756void ieee80211_sta_req_auth(struct net_device *dev,
2757 struct ieee80211_if_sta *ifsta)
2758{
2759 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2760 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2761
51fb61e7 2762 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2763 return;
2764
d6f2da5b
JS		 2765 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
2766 IEEE80211_STA_AUTO_BSSID_SEL)) &&
2767 (ifsta->flags & (IEEE80211_STA_SSID_SET |
2768 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 2769 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2770 queue_work(local->hw.workqueue, &ifsta->work);
2771 }
2772}
2773
2774static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
2775 const char *ssid, int ssid_len)
2776{
2777 int tmp, hidden_ssid;
2778
48225709
MW		 2779 if (ssid_len == ifsta->ssid_len &&
2780 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 2781 return 1;
2782
d6f2da5b 2783 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 2784 return 0;
2785
2786 hidden_ssid = 1;
2787 tmp = ssid_len;
2788 while (tmp--) {
2789 if (ssid[tmp] != '\0') {
2790 hidden_ssid = 0;
2791 break;
2792 }
2793 }
2794
2795 if (hidden_ssid && ifsta->ssid_len == ssid_len)
2796 return 1;
2797
2798 if (ssid_len == 1 && ssid[0] == ' ')
2799 return 1;
2800
2801 return 0;
2802}
2803
2804static int ieee80211_sta_config_auth(struct net_device *dev,
2805 struct ieee80211_if_sta *ifsta)
2806{
2807 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2808 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2809 struct ieee80211_sta_bss *bss, *selected = NULL;
2810 int top_rssi = 0, freq;
2811
d6f2da5b
JS		 2812 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
2813 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 2814 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2815 ieee80211_sta_reset_auth(dev, ifsta);
2816 return 0;
2817 }
2818
2819 spin_lock_bh(&local->sta_bss_lock);
2820 freq = local->oper_channel->freq;
2821 list_for_each_entry(bss, &local->sta_bss_list, list) {
2822 if (!(bss->capability & WLAN_CAPABILITY_ESS))
2823 continue;
2824
2825 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
2826 !!sdata->default_key)
2827 continue;
2828
d6f2da5b
JS		 2829 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
2830 bss->freq != freq)
f0706e82
JB		 2831 continue;
2832
d6f2da5b 2833 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 2834 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
2835 continue;
2836
d6f2da5b 2837 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 2838 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
2839 continue;
2840
2841 if (!selected || top_rssi < bss->rssi) {
2842 selected = bss;
2843 top_rssi = bss->rssi;
2844 }
2845 }
2846 if (selected)
2847 atomic_inc(&selected->users);
2848 spin_unlock_bh(&local->sta_bss_lock);
2849
2850 if (selected) {
2851 ieee80211_set_channel(local, -1, selected->freq);
d6f2da5b 2852 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 2853 ieee80211_sta_set_ssid(dev, selected->ssid,
2854 selected->ssid_len);
2855 ieee80211_sta_set_bssid(dev, selected->bssid);
2856 ieee80211_rx_bss_put(dev, selected);
2857 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 2858 ieee80211_sta_reset_auth(dev, ifsta);
2859 return 0;
2860 } else {
2861 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 2862 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 2863 ieee80211_sta_start_scan(dev, NULL, 0);
2864 else
2865 ieee80211_sta_start_scan(dev, ifsta->ssid,
2866 ifsta->ssid_len);
f0706e82
JB		 2867 ifsta->state = IEEE80211_AUTHENTICATE;
2868 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
2869 } else
2870 ifsta->state = IEEE80211_DISABLED;
2871 }
f0706e82
JB		 2872 return -1;
2873}
2874
2875static int ieee80211_sta_join_ibss(struct net_device *dev,
2876 struct ieee80211_if_sta *ifsta,
2877 struct ieee80211_sta_bss *bss)
2878{
2879 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2880 int res, rates, i, j;
2881 struct sk_buff *skb;
2882 struct ieee80211_mgmt *mgmt;
2883 struct ieee80211_tx_control control;
f0706e82 2884 struct ieee80211_hw_mode *mode;
1abbe498 2885 struct rate_selection ratesel;
f0706e82
JB		 2886 u8 *pos;
2887 struct ieee80211_sub_if_data *sdata;
2888
2889 /* Remove possible STA entries from other IBSS networks. */
2890 sta_info_flush(local, NULL);
2891
2892 if (local->ops->reset_tsf) {
2893 /* Reset own TSF to allow time synchronization work. */
2894 local->ops->reset_tsf(local_to_hw(local));
2895 }
2896 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2897 res = ieee80211_if_config(dev);
2898 if (res)
2899 return res;
2900
2901 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2902
2903 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2904 sdata->drop_unencrypted = bss->capability &
2905 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2906
2907 res = ieee80211_set_channel(local, -1, bss->freq);
2908
2909 if (!(local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)) {
2910 printk(KERN_DEBUG "%s: IBSS not allowed on channel %d "
2911 "(%d MHz)\n", dev->name, local->hw.conf.channel,
2912 local->hw.conf.freq);
2913 return -1;
2914 }
2915
2916 /* Set beacon template based on scan results */
2917 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2918 do {
2919 if (!skb)
2920 break;
2921
2922 skb_reserve(skb, local->hw.extra_tx_headroom);
2923
2924 mgmt = (struct ieee80211_mgmt *)
2925 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2926 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2927 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2928 IEEE80211_STYPE_BEACON);
2929 memset(mgmt->da, 0xff, ETH_ALEN);
2930 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2931 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2932 mgmt->u.beacon.beacon_int =
2933 cpu_to_le16(local->hw.conf.beacon_int);
2934 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2935
2936 pos = skb_put(skb, 2 + ifsta->ssid_len);
2937 *pos++ = WLAN_EID_SSID;
2938 *pos++ = ifsta->ssid_len;
2939 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2940
2941 rates = bss->supp_rates_len;
2942 if (rates > 8)
2943 rates = 8;
2944 pos = skb_put(skb, 2 + rates);
2945 *pos++ = WLAN_EID_SUPP_RATES;
2946 *pos++ = rates;
2947 memcpy(pos, bss->supp_rates, rates);
2948
2949 pos = skb_put(skb, 2 + 1);
2950 *pos++ = WLAN_EID_DS_PARAMS;
2951 *pos++ = 1;
2952 *pos++ = bss->channel;
2953
2954 pos = skb_put(skb, 2 + 2);
2955 *pos++ = WLAN_EID_IBSS_PARAMS;
2956 *pos++ = 2;
2957 /* FIX: set ATIM window based on scan results */
2958 *pos++ = 0;
2959 *pos++ = 0;
2960
2961 if (bss->supp_rates_len > 8) {
2962 rates = bss->supp_rates_len - 8;
2963 pos = skb_put(skb, 2 + rates);
2964 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2965 *pos++ = rates;
2966 memcpy(pos, &bss->supp_rates[8], rates);
2967 }
2968
2969 memset(&control, 0, sizeof(control));
1abbe498
MN		 2970 rate_control_get_rate(dev, local->oper_hw_mode, skb, &ratesel);
2971 if (!ratesel.rate) {
f0706e82
JB		 2972 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2973 "for IBSS beacon\n", dev->name);
2974 break;
2975 }
0f7054e3 2976 control.vif = &sdata->vif;
13262ffd 2977 control.tx_rate =
471b3efd 2978 (sdata->bss_conf.use_short_preamble &&
1abbe498
MN		 2979 (ratesel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2980 ratesel.rate->val2 : ratesel.rate->val;
f0706e82
JB		 2981 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2982 control.power_level = local->hw.conf.power_level;
2983 control.flags |= IEEE80211_TXCTL_NO_ACK;
2984 control.retry_limit = 1;
2985
2986 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2987 if (ifsta->probe_resp) {
2988 mgmt = (struct ieee80211_mgmt *)
2989 ifsta->probe_resp->data;
2990 mgmt->frame_control =
2991 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2992 IEEE80211_STYPE_PROBE_RESP);
2993 } else {
2994 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2995 "template for IBSS\n", dev->name);
2996 }
2997
2998 if (local->ops->beacon_update &&
2999 local->ops->beacon_update(local_to_hw(local),
3000 skb, &control) == 0) {
3001 printk(KERN_DEBUG "%s: Configured IBSS beacon "
3002 "template based on scan results\n", dev->name);
3003 skb = NULL;
3004 }
3005
3006 rates = 0;
3007 mode = local->oper_hw_mode;
3008 for (i = 0; i < bss->supp_rates_len; i++) {
3009 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
f0706e82
JB		 3010 for (j = 0; j < mode->num_rates; j++)
3011 if (mode->rates[j].rate == bitrate)
3012 rates |= BIT(j);
3013 }
3014 ifsta->supp_rates_bits = rates;
3015 } while (0);
3016
3017 if (skb) {
3018 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
3019 "template\n", dev->name);
3020 dev_kfree_skb(skb);
3021 }
3022
3023 ifsta->state = IEEE80211_IBSS_JOINED;
3024 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3025
3026 ieee80211_rx_bss_put(dev, bss);
3027
3028 return res;
3029}
3030
3031
3032static int ieee80211_sta_create_ibss(struct net_device *dev,
3033 struct ieee80211_if_sta *ifsta)
3034{
3035 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3036 struct ieee80211_sta_bss *bss;
cffdd30d 3037 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 3038 struct ieee80211_hw_mode *mode;
3039 u8 bssid[ETH_ALEN], *pos;
3040 int i;
0795af57 3041 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3042
3043#if 0
3044 /* Easier testing, use fixed BSSID. */
3045 memset(bssid, 0xfe, ETH_ALEN);
3046#else
3047 /* Generate random, not broadcast, locally administered BSSID. Mix in
3048 * own MAC address to make sure that devices that do not have proper
3049 * random number generator get different BSSID. */
3050 get_random_bytes(bssid, ETH_ALEN);
3051 for (i = 0; i < ETH_ALEN; i++)
3052 bssid[i] ^= dev->dev_addr[i];
3053 bssid[0] &= ~0x01;
3054 bssid[0] |= 0x02;
3055#endif
3056
0795af57
JP		 3057 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3058 dev->name, print_mac(mac, bssid));
f0706e82 3059
cffdd30d
JL		 3060 bss = ieee80211_rx_bss_add(dev, bssid, local->hw.conf.channel,
3061 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3062 if (!bss)
3063 return -ENOMEM;
3064
f0706e82
JB		 3065 mode = local->oper_hw_mode;
3066
3067 if (local->hw.conf.beacon_int == 0)
3068 local->hw.conf.beacon_int = 100;
3069 bss->beacon_int = local->hw.conf.beacon_int;
3070 bss->hw_mode = local->hw.conf.phymode;
f0706e82
JB		 3071 bss->freq = local->hw.conf.freq;
3072 bss->last_update = jiffies;
3073 bss->capability = WLAN_CAPABILITY_IBSS;
3074 if (sdata->default_key) {
3075 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3076 } else
3077 sdata->drop_unencrypted = 0;
3078 bss->supp_rates_len = mode->num_rates;
3079 pos = bss->supp_rates;
3080 for (i = 0; i < mode->num_rates; i++) {
3081 int rate = mode->rates[i].rate;
f0706e82
JB		 3082 *pos++ = (u8) (rate / 5);
3083 }
3084
3085 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3086}
3087
3088
3089static int ieee80211_sta_find_ibss(struct net_device *dev,
3090 struct ieee80211_if_sta *ifsta)
3091{
3092 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3093 struct ieee80211_sta_bss *bss;
3094 int found = 0;
3095 u8 bssid[ETH_ALEN];
3096 int active_ibss;
0795af57
JP		 3097 DECLARE_MAC_BUF(mac);
3098 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3099
3100 if (ifsta->ssid_len == 0)
3101 return -EINVAL;
3102
3103 active_ibss = ieee80211_sta_active_ibss(dev);
3104#ifdef CONFIG_MAC80211_IBSS_DEBUG
3105 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3106 dev->name, active_ibss);
3107#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3108 spin_lock_bh(&local->sta_bss_lock);
3109 list_for_each_entry(bss, &local->sta_bss_list, list) {
3110 if (ifsta->ssid_len != bss->ssid_len ||
3111 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3112 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3113 continue;
3114#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3115 printk(KERN_DEBUG " bssid=%s found\n",
3116 print_mac(mac, bss->bssid));
f0706e82
JB		 3117#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3118 memcpy(bssid, bss->bssid, ETH_ALEN);
3119 found = 1;
3120 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3121 break;
3122 }
3123 spin_unlock_bh(&local->sta_bss_lock);
3124
3125#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3126 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3127 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3128#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3129 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
cffdd30d
JL		 3130 (bss = ieee80211_rx_bss_get(dev, bssid, local->hw.conf.channel,
3131 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3132 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3133 " based on configured SSID\n",
0795af57 3134 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3135 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3136 }
3137#ifdef CONFIG_MAC80211_IBSS_DEBUG
3138 printk(KERN_DEBUG " did not try to join ibss\n");
3139#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3140
3141 /* Selected IBSS not found in current scan results - try to scan */
3142 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3143 !ieee80211_sta_active_ibss(dev)) {
3144 mod_timer(&ifsta->timer, jiffies +
3145 IEEE80211_IBSS_MERGE_INTERVAL);
3146 } else if (time_after(jiffies, local->last_scan_completed +
3147 IEEE80211_SCAN_INTERVAL)) {
3148 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3149 "join\n", dev->name);
3150 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3151 ifsta->ssid_len);
3152 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3153 int interval = IEEE80211_SCAN_INTERVAL;
3154
3155 if (time_after(jiffies, ifsta->ibss_join_req +
3156 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3157 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
f0706e82
JB		 3158 local->oper_channel->flag & IEEE80211_CHAN_W_IBSS)
3159 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3160 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
f0706e82
JB		 3161 printk(KERN_DEBUG "%s: IBSS not allowed on the"
3162 " configured channel %d (%d MHz)\n",
3163 dev->name, local->hw.conf.channel,
3164 local->hw.conf.freq);
3165 }
3166
3167 /* No IBSS found - decrease scan interval and continue
3168 * scanning. */
3169 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3170 }
3171
3172 ifsta->state = IEEE80211_IBSS_SEARCH;
3173 mod_timer(&ifsta->timer, jiffies + interval);
3174 return 0;
3175 }
3176
3177 return 0;
3178}
3179
3180
3181int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3182{
3183 struct ieee80211_sub_if_data *sdata;
3184 struct ieee80211_if_sta *ifsta;
3185 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3186
3187 if (len > IEEE80211_MAX_SSID_LEN)
3188 return -EINVAL;
3189
3190 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3191 * not defined. */
3192 if (local->ops->conf_tx) {
3193 struct ieee80211_tx_queue_params qparam;
3194 int i;
3195
3196 memset(&qparam, 0, sizeof(qparam));
3197 /* TODO: are these ok defaults for all hw_modes? */
3198 qparam.aifs = 2;
3199 qparam.cw_min =
3200 local->hw.conf.phymode == MODE_IEEE80211B ? 31 : 15;
3201 qparam.cw_max = 1023;
3202 qparam.burst_time = 0;
3203 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
3204 {
3205 local->ops->conf_tx(local_to_hw(local),
3206 i + IEEE80211_TX_QUEUE_DATA0,
3207 &qparam);
3208 }
3209 /* IBSS uses different parameters for Beacon sending */
3210 qparam.cw_min++;
3211 qparam.cw_min *= 2;
3212 qparam.cw_min--;
3213 local->ops->conf_tx(local_to_hw(local),
3214 IEEE80211_TX_QUEUE_BEACON, &qparam);
3215 }
3216
3217 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3218 ifsta = &sdata->u.sta;
3219
3220 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3221 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3222 memcpy(ifsta->ssid, ssid, len);
3223 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3224 ifsta->ssid_len = len;
3225
d6f2da5b
JS		 3226 if (len)
3227 ifsta->flags |= IEEE80211_STA_SSID_SET;
3228 else
3229 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3230 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3231 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3232 ifsta->ibss_join_req = jiffies;
3233 ifsta->state = IEEE80211_IBSS_SEARCH;
3234 return ieee80211_sta_find_ibss(dev, ifsta);
3235 }
3236 return 0;
3237}
3238
3239
3240int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3241{
3242 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3243 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3244 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3245 *len = ifsta->ssid_len;
3246 return 0;
3247}
3248
3249
3250int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3251{
3252 struct ieee80211_sub_if_data *sdata;
3253 struct ieee80211_if_sta *ifsta;
3254 int res;
3255
3256 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3257 ifsta = &sdata->u.sta;
3258
3259 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3260 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3261 res = ieee80211_if_config(dev);
3262 if (res) {
3263 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3264 "the low-level driver\n", dev->name);
3265 return res;
3266 }
3267 }
3268
d6f2da5b
JS		 3269 if (is_valid_ether_addr(bssid))
3270 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3271 else
d6f2da5b
JS		 3272 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3273
f0706e82
JB		 3274 return 0;
3275}
3276
3277
3278static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3279 struct ieee80211_sub_if_data *sdata,
3280 int powersave)
3281{
3282 struct sk_buff *skb;
3283 struct ieee80211_hdr *nullfunc;
3284 u16 fc;
3285
3286 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3287 if (!skb) {
3288 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3289 "frame\n", sdata->dev->name);
3290 return;
3291 }
3292 skb_reserve(skb, local->hw.extra_tx_headroom);
3293
3294 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3295 memset(nullfunc, 0, 24);
3296 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3297 IEEE80211_FCTL_TODS;
3298 if (powersave)
3299 fc |= IEEE80211_FCTL_PM;
3300 nullfunc->frame_control = cpu_to_le16(fc);
3301 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3302 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3303 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3304
3305 ieee80211_sta_tx(sdata->dev, skb, 0);
3306}
3307
3308
3309void ieee80211_scan_completed(struct ieee80211_hw *hw)
3310{
3311 struct ieee80211_local *local = hw_to_local(hw);
3312 struct net_device *dev = local->scan_dev;
3313 struct ieee80211_sub_if_data *sdata;
3314 union iwreq_data wrqu;
3315
3316 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3317 memset(&wrqu, 0, sizeof(wrqu));
3318 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3319
ece8eddd
ZY		 3320 if (local->sta_hw_scanning) {
3321 local->sta_hw_scanning = 0;
3322 goto done;
3323 }
3324
3325 local->sta_sw_scanning = 0;
f0706e82 3326 if (ieee80211_hw_config(local))
4b50e388 3327 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3328 "channel after scan\n", dev->name);
3329
4150c572
JB		 3330
3331 netif_tx_lock_bh(local->mdev);
3332 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3333 local->ops->configure_filter(local_to_hw(local),
3334 FIF_BCN_PRBRESP_PROMISC,
3335 &local->filter_flags,
3336 local->mdev->mc_count,
3337 local->mdev->mc_list);
3338
3339 netif_tx_unlock_bh(local->mdev);
f0706e82 3340
79010420
JB		 3341 rcu_read_lock();
3342 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3343
3344 /* No need to wake the master device. */
3345 if (sdata->dev == local->mdev)
3346 continue;
3347
51fb61e7 3348 if (sdata->vif.type == IEEE80211_IF_TYPE_STA) {
d6f2da5b 3349 if (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 3350 ieee80211_send_nullfunc(local, sdata, 0);
3351 ieee80211_sta_timer((unsigned long)sdata);
3352 }
14042cbe 3353
f0706e82
JB		 3354 netif_wake_queue(sdata->dev);
3355 }
79010420 3356 rcu_read_unlock();
f0706e82 3357
ece8eddd 3358done:
f0706e82 3359 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3360 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3361 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3362 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3363 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3364 !ieee80211_sta_active_ibss(dev)))
3365 ieee80211_sta_find_ibss(dev, ifsta);
3366 }
3367}
3368EXPORT_SYMBOL(ieee80211_scan_completed);
3369
3370void ieee80211_sta_scan_work(struct work_struct *work)
3371{
3372 struct ieee80211_local *local =
3373 container_of(work, struct ieee80211_local, scan_work.work);
3374 struct net_device *dev = local->scan_dev;
3375 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3376 struct ieee80211_hw_mode *mode;
3377 struct ieee80211_channel *chan;
3378 int skip;
3379 unsigned long next_delay = 0;
3380
ece8eddd 3381 if (!local->sta_sw_scanning)
f0706e82
JB		 3382 return;
3383
3384 switch (local->scan_state) {
3385 case SCAN_SET_CHANNEL:
3386 mode = local->scan_hw_mode;
3387 if (local->scan_hw_mode->list.next == &local->modes_list &&
3388 local->scan_channel_idx >= mode->num_channels) {
3389 ieee80211_scan_completed(local_to_hw(local));
3390 return;
3391 }
3392 skip = !(local->enabled_modes & (1 << mode->mode));
3393 chan = &mode->channels[local->scan_channel_idx];
3394 if (!(chan->flag & IEEE80211_CHAN_W_SCAN) ||
51fb61e7 3395 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 3396 !(chan->flag & IEEE80211_CHAN_W_IBSS)) ||
3397 (local->hw_modes & local->enabled_modes &
3398 (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
3399 skip = 1;
3400
3401 if (!skip) {
3402#if 0
3403 printk(KERN_DEBUG "%s: scan channel %d (%d MHz)\n",
3404 dev->name, chan->chan, chan->freq);
3405#endif
3406
3407 local->scan_channel = chan;
3408 if (ieee80211_hw_config(local)) {
3409 printk(KERN_DEBUG "%s: failed to set channel "
3410 "%d (%d MHz) for scan\n", dev->name,
3411 chan->chan, chan->freq);
3412 skip = 1;
3413 }
3414 }
3415
3416 local->scan_channel_idx++;
3417 if (local->scan_channel_idx >= local->scan_hw_mode->num_channels) {
3418 if (local->scan_hw_mode->list.next != &local->modes_list) {
3419 local->scan_hw_mode = list_entry(local->scan_hw_mode->list.next,
3420 struct ieee80211_hw_mode,
3421 list);
3422 local->scan_channel_idx = 0;
3423 }
3424 }
3425
3426 if (skip)
3427 break;
3428
3429 next_delay = IEEE80211_PROBE_DELAY +
3430 usecs_to_jiffies(local->hw.channel_change_time);
3431 local->scan_state = SCAN_SEND_PROBE;
3432 break;
3433 case SCAN_SEND_PROBE:
3434 if (local->scan_channel->flag & IEEE80211_CHAN_W_ACTIVE_SCAN) {
3435 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3436 local->scan_ssid_len);
3437 next_delay = IEEE80211_CHANNEL_TIME;
3438 } else
3439 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
3440 local->scan_state = SCAN_SET_CHANNEL;
3441 break;
3442 }
3443
ece8eddd 3444 if (local->sta_sw_scanning)
f0706e82
JB		 3445 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3446 next_delay);
3447}
3448
3449
3450static int ieee80211_sta_start_scan(struct net_device *dev,
3451 u8 *ssid, size_t ssid_len)
3452{
3453 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3454 struct ieee80211_sub_if_data *sdata;
3455
3456 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3457 return -EINVAL;
3458
3459 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3460 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3461 * BSSID: MACAddress
3462 * SSID
3463 * ScanType: ACTIVE, PASSIVE
3464 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3465 * a Probe frame during active scanning
3466 * ChannelList
3467 * MinChannelTime (>= ProbeDelay), in TU
3468 * MaxChannelTime: (>= MinChannelTime), in TU
3469 */
3470
3471 /* MLME-SCAN.confirm
3472 * BSSDescriptionSet
3473 * ResultCode: SUCCESS, INVALID_PARAMETERS
3474 */
3475
ece8eddd 3476 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3477 if (local->scan_dev == dev)
3478 return 0;
3479 return -EBUSY;
3480 }
3481
3482 if (local->ops->hw_scan) {
3483 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3484 ssid, ssid_len);
f0706e82 3485 if (!rc) {
ece8eddd 3486 local->sta_hw_scanning = 1;
f0706e82
JB		 3487 local->scan_dev = dev;
3488 }
3489 return rc;
3490 }
3491
ece8eddd 3492 local->sta_sw_scanning = 1;
f0706e82 3493
79010420
JB		 3494 rcu_read_lock();
3495 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3496
3497 /* Don't stop the master interface, otherwise we can't transmit
3498 * probes! */
3499 if (sdata->dev == local->mdev)
3500 continue;
3501
f0706e82 3502 netif_stop_queue(sdata->dev);
51fb61e7 3503 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3504 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3505 ieee80211_send_nullfunc(local, sdata, 1);
3506 }
79010420 3507 rcu_read_unlock();
f0706e82
JB		 3508
3509 if (ssid) {
3510 local->scan_ssid_len = ssid_len;
3511 memcpy(local->scan_ssid, ssid, ssid_len);
3512 } else
3513 local->scan_ssid_len = 0;
3514 local->scan_state = SCAN_SET_CHANNEL;
3515 local->scan_hw_mode = list_entry(local->modes_list.next,
3516 struct ieee80211_hw_mode,
3517 list);
3518 local->scan_channel_idx = 0;
3519 local->scan_dev = dev;
3520
4150c572
JB		 3521 netif_tx_lock_bh(local->mdev);
3522 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3523 local->ops->configure_filter(local_to_hw(local),
3524 FIF_BCN_PRBRESP_PROMISC,
3525 &local->filter_flags,
3526 local->mdev->mc_count,
3527 local->mdev->mc_list);
3528 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3529
3530 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3531 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3532 IEEE80211_CHANNEL_TIME);
3533
3534 return 0;
3535}
3536
3537
3538int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3539{
3540 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3541 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3542 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3543
51fb61e7 3544 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3545 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3546
ece8eddd 3547 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3548 if (local->scan_dev == dev)
3549 return 0;
3550 return -EBUSY;
3551 }
3552
a0af5f14
HS		 3553 ifsta->scan_ssid_len = ssid_len;
3554 if (ssid_len)
3555 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3556 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3557 queue_work(local->hw.workqueue, &ifsta->work);
3558 return 0;
3559}
3560
3561static char *
3562ieee80211_sta_scan_result(struct net_device *dev,
3563 struct ieee80211_sta_bss *bss,
3564 char *current_ev, char *end_buf)
3565{
3566 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3567 struct iw_event iwe;
3568
3569 if (time_after(jiffies,
3570 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3571 return current_ev;
3572
3573 if (!(local->enabled_modes & (1 << bss->hw_mode)))
3574 return current_ev;
3575
f0706e82
JB		 3576 memset(&iwe, 0, sizeof(iwe));
3577 iwe.cmd = SIOCGIWAP;
3578 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3579 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3580 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3581 IW_EV_ADDR_LEN);
3582
3583 memset(&iwe, 0, sizeof(iwe));
3584 iwe.cmd = SIOCGIWESSID;
3585 iwe.u.data.length = bss->ssid_len;
3586 iwe.u.data.flags = 1;
3587 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3588 bss->ssid);
3589
3590 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)) {
3591 memset(&iwe, 0, sizeof(iwe));
3592 iwe.cmd = SIOCGIWMODE;
3593 if (bss->capability & WLAN_CAPABILITY_ESS)
3594 iwe.u.mode = IW_MODE_MASTER;
3595 else
3596 iwe.u.mode = IW_MODE_ADHOC;
3597 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3598 IW_EV_UINT_LEN);
3599 }
3600
3601 memset(&iwe, 0, sizeof(iwe));
3602 iwe.cmd = SIOCGIWFREQ;
3603 iwe.u.freq.m = bss->channel;
3604 iwe.u.freq.e = 0;
3605 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3606 IW_EV_FREQ_LEN);
3607 iwe.u.freq.m = bss->freq * 100000;
3608 iwe.u.freq.e = 1;
3609 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3610 IW_EV_FREQ_LEN);
3611
3612 memset(&iwe, 0, sizeof(iwe));
3613 iwe.cmd = IWEVQUAL;
3614 iwe.u.qual.qual = bss->signal;
3615 iwe.u.qual.level = bss->rssi;
3616 iwe.u.qual.noise = bss->noise;
3617 iwe.u.qual.updated = local->wstats_flags;
3618 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3619 IW_EV_QUAL_LEN);
3620
3621 memset(&iwe, 0, sizeof(iwe));
3622 iwe.cmd = SIOCGIWENCODE;
3623 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3624 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3625 else
3626 iwe.u.data.flags = IW_ENCODE_DISABLED;
3627 iwe.u.data.length = 0;
3628 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3629
3630 if (bss && bss->wpa_ie) {
3631 memset(&iwe, 0, sizeof(iwe));
3632 iwe.cmd = IWEVGENIE;
3633 iwe.u.data.length = bss->wpa_ie_len;
3634 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3635 bss->wpa_ie);
3636 }
3637
3638 if (bss && bss->rsn_ie) {
3639 memset(&iwe, 0, sizeof(iwe));
3640 iwe.cmd = IWEVGENIE;
3641 iwe.u.data.length = bss->rsn_ie_len;
3642 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3643 bss->rsn_ie);
3644 }
3645
3646 if (bss && bss->supp_rates_len > 0) {
3647 /* display all supported rates in readable format */
3648 char *p = current_ev + IW_EV_LCP_LEN;
3649 int i;
3650
3651 memset(&iwe, 0, sizeof(iwe));
3652 iwe.cmd = SIOCGIWRATE;
3653 /* Those two flags are ignored... */
3654 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3655
3656 for (i = 0; i < bss->supp_rates_len; i++) {
3657 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3658 0x7f) * 500000);
3659 p = iwe_stream_add_value(current_ev, p,
3660 end_buf, &iwe, IW_EV_PARAM_LEN);
3661 }
3662 current_ev = p;
3663 }
3664
3665 if (bss) {
3666 char *buf;
3667 buf = kmalloc(30, GFP_ATOMIC);
3668 if (buf) {
3669 memset(&iwe, 0, sizeof(iwe));
3670 iwe.cmd = IWEVCUSTOM;
3671 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3672 iwe.u.data.length = strlen(buf);
3673 current_ev = iwe_stream_add_point(current_ev, end_buf,
3674 &iwe, buf);
3675 kfree(buf);
3676 }
3677 }
3678
f0706e82
JB		 3679 return current_ev;
3680}
3681
3682
3683int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
3684{
3685 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3686 char *current_ev = buf;
3687 char *end_buf = buf + len;
3688 struct ieee80211_sta_bss *bss;
3689
3690 spin_lock_bh(&local->sta_bss_lock);
3691 list_for_each_entry(bss, &local->sta_bss_list, list) {
3692 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
3693 spin_unlock_bh(&local->sta_bss_lock);
3694 return -E2BIG;
3695 }
3696 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
3697 end_buf);
3698 }
3699 spin_unlock_bh(&local->sta_bss_lock);
3700 return current_ev - buf;
3701}
3702
3703
3704int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
3705{
3706 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3707 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3708 kfree(ifsta->extra_ie);
3709 if (len == 0) {
3710 ifsta->extra_ie = NULL;
3711 ifsta->extra_ie_len = 0;
3712 return 0;
3713 }
3714 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3715 if (!ifsta->extra_ie) {
3716 ifsta->extra_ie_len = 0;
3717 return -ENOMEM;
3718 }
3719 memcpy(ifsta->extra_ie, ie, len);
3720 ifsta->extra_ie_len = len;
3721 return 0;
3722}
3723
3724
3725struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
3726 struct sk_buff *skb, u8 *bssid,
3727 u8 *addr)
3728{
3729 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3730 struct sta_info *sta;
91fa558b 3731 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 3732 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3733
3734 /* TODO: Could consider removing the least recently used entry and
3735 * allow new one to be added. */
3736 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3737 if (net_ratelimit()) {
3738 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 3739 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 3740 }
3741 return NULL;
3742 }
3743
0795af57 3744 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 3745 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82
JB		 3746
3747 sta = sta_info_add(local, dev, addr, GFP_ATOMIC);
3748 if (!sta)
3749 return NULL;
3750
3751 sta->supp_rates = sdata->u.sta.supp_rates_bits;
3752
3753 rate_control_rate_init(sta, local);
3754
3755 return sta; /* caller will call sta_info_put() */
3756}
3757
3758
3759int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
3760{
3761 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3762 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3763
3764 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
3765 dev->name, reason);
3766
51fb61e7
JB		 3767 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3768 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 3769 return -EINVAL;
3770
3771 ieee80211_send_deauth(dev, ifsta, reason);
3772 ieee80211_set_disassoc(dev, ifsta, 1);
3773 return 0;
3774}
3775
3776
3777int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
3778{
3779 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3780 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3781
3782 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
3783 dev->name, reason);
3784
51fb61e7 3785 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3786 return -EINVAL;
3787
d6f2da5b 3788 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3789 return -1;
3790
3791 ieee80211_send_disassoc(dev, ifsta, reason);
3792 ieee80211_set_disassoc(dev, ifsta, 0);
3793 return 0;
3794}
Linux 6.x block layer and io_uring tree(s)