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mac80211: filter scan results on unusable channels
[linux-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>
d0709a65 27#include <linux/rtnetlink.h>
f0706e82
JB		 28#include <net/iw_handler.h>
29#include <asm/types.h>
f0706e82
JB		 30
31#include <net/mac80211.h>
32#include "ieee80211_i.h"
33#include "ieee80211_rate.h"
47f0c502 34#include "ieee80211_led.h"
f709fc69 35#include "mesh.h"
f0706e82
JB		 36
37#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
38#define IEEE80211_AUTH_MAX_TRIES 3
39#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
40#define IEEE80211_ASSOC_MAX_TRIES 3
41#define IEEE80211_MONITORING_INTERVAL (2 * HZ)
f709fc69 42#define IEEE80211_MESH_HOUSEKEEPING_INTERVAL (60 * HZ)
f0706e82
JB		 43#define IEEE80211_PROBE_INTERVAL (60 * HZ)
44#define IEEE80211_RETRY_AUTH_INTERVAL (1 * HZ)
45#define IEEE80211_SCAN_INTERVAL (2 * HZ)
46#define IEEE80211_SCAN_INTERVAL_SLOW (15 * HZ)
47#define IEEE80211_IBSS_JOIN_TIMEOUT (20 * HZ)
48
49#define IEEE80211_PROBE_DELAY (HZ / 33)
50#define IEEE80211_CHANNEL_TIME (HZ / 33)
51#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
52#define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
53#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
54#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 55#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 56
57#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
58
59
60#define IEEE80211_FC(type, stype) cpu_to_le16(type | stype)
61
62#define ERP_INFO_USE_PROTECTION BIT(1)
63
9f985b0e
RR		 64/* mgmt header + 1 byte action code */
65#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
66
67#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
68#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
69#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 70#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
71#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 72
07db2183
RR		 73/* next values represent the buffer size for A-MPDU frame.
74 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
75#define IEEE80211_MIN_AMPDU_BUF 0x8
76#define IEEE80211_MAX_AMPDU_BUF 0x40
77
f0706e82
JB		 78static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
79 u8 *ssid, size_t ssid_len);
80static struct ieee80211_sta_bss *
8318d78a 81ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 82 u8 *ssid, u8 ssid_len);
f0706e82
JB		 83static void ieee80211_rx_bss_put(struct net_device *dev,
84 struct ieee80211_sta_bss *bss);
85static int ieee80211_sta_find_ibss(struct net_device *dev,
86 struct ieee80211_if_sta *ifsta);
87static int ieee80211_sta_wep_configured(struct net_device *dev);
88static int ieee80211_sta_start_scan(struct net_device *dev,
89 u8 *ssid, size_t ssid_len);
90static int ieee80211_sta_config_auth(struct net_device *dev,
91 struct ieee80211_if_sta *ifsta);
92
93
ee385855
LCC		 94void ieee802_11_parse_elems(u8 *start, size_t len,
95 struct ieee802_11_elems *elems)
f0706e82
JB		 96{
97 size_t left = len;
98 u8 *pos = start;
f0706e82
JB		 99
100 memset(elems, 0, sizeof(*elems));
101
102 while (left >= 2) {
103 u8 id, elen;
104
105 id = *pos++;
106 elen = *pos++;
107 left -= 2;
108
67a4cce4
JL		 109 if (elen > left)
110 return;
f0706e82
JB		 111
112 switch (id) {
113 case WLAN_EID_SSID:
114 elems->ssid = pos;
115 elems->ssid_len = elen;
116 break;
117 case WLAN_EID_SUPP_RATES:
118 elems->supp_rates = pos;
119 elems->supp_rates_len = elen;
120 break;
121 case WLAN_EID_FH_PARAMS:
122 elems->fh_params = pos;
123 elems->fh_params_len = elen;
124 break;
125 case WLAN_EID_DS_PARAMS:
126 elems->ds_params = pos;
127 elems->ds_params_len = elen;
128 break;
129 case WLAN_EID_CF_PARAMS:
130 elems->cf_params = pos;
131 elems->cf_params_len = elen;
132 break;
133 case WLAN_EID_TIM:
134 elems->tim = pos;
135 elems->tim_len = elen;
136 break;
137 case WLAN_EID_IBSS_PARAMS:
138 elems->ibss_params = pos;
139 elems->ibss_params_len = elen;
140 break;
141 case WLAN_EID_CHALLENGE:
142 elems->challenge = pos;
143 elems->challenge_len = elen;
144 break;
145 case WLAN_EID_WPA:
146 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
147 pos[2] == 0xf2) {
148 /* Microsoft OUI (00:50:F2) */
149 if (pos[3] == 1) {
150 /* OUI Type 1 - WPA IE */
151 elems->wpa = pos;
152 elems->wpa_len = elen;
153 } else if (elen >= 5 && pos[3] == 2) {
154 if (pos[4] == 0) {
155 elems->wmm_info = pos;
156 elems->wmm_info_len = elen;
157 } else if (pos[4] == 1) {
158 elems->wmm_param = pos;
159 elems->wmm_param_len = elen;
160 }
161 }
162 }
163 break;
164 case WLAN_EID_RSN:
165 elems->rsn = pos;
166 elems->rsn_len = elen;
167 break;
168 case WLAN_EID_ERP_INFO:
169 elems->erp_info = pos;
170 elems->erp_info_len = elen;
171 break;
172 case WLAN_EID_EXT_SUPP_RATES:
173 elems->ext_supp_rates = pos;
174 elems->ext_supp_rates_len = elen;
175 break;
c7153508
RR		 176 case WLAN_EID_HT_CAPABILITY:
177 elems->ht_cap_elem = pos;
178 elems->ht_cap_elem_len = elen;
179 break;
180 case WLAN_EID_HT_EXTRA_INFO:
181 elems->ht_info_elem = pos;
182 elems->ht_info_elem_len = elen;
183 break;
ee385855
LCC		 184 case WLAN_EID_MESH_ID:
185 elems->mesh_id = pos;
186 elems->mesh_id_len = elen;
187 break;
188 case WLAN_EID_MESH_CONFIG:
189 elems->mesh_config = pos;
190 elems->mesh_config_len = elen;
191 break;
192 case WLAN_EID_PEER_LINK:
193 elems->peer_link = pos;
194 elems->peer_link_len = elen;
195 break;
196 case WLAN_EID_PREQ:
197 elems->preq = pos;
198 elems->preq_len = elen;
199 break;
200 case WLAN_EID_PREP:
201 elems->prep = pos;
202 elems->prep_len = elen;
203 break;
204 case WLAN_EID_PERR:
205 elems->perr = pos;
206 elems->perr_len = elen;
207 break;
f0706e82 208 default:
f0706e82
JB		 209 break;
210 }
211
212 left -= elen;
213 pos += elen;
214 }
f0706e82
JB		 215}
216
217
f0706e82
JB		 218static int ecw2cw(int ecw)
219{
ac2bf324 220 return (1 << ecw) - 1;
f0706e82
JB		 221}
222
f0706e82
JB		 223static void ieee80211_sta_wmm_params(struct net_device *dev,
224 struct ieee80211_if_sta *ifsta,
225 u8 *wmm_param, size_t wmm_param_len)
226{
227 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
228 struct ieee80211_tx_queue_params params;
229 size_t left;
230 int count;
231 u8 *pos;
232
233 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
234 return;
235 count = wmm_param[6] & 0x0f;
236 if (count == ifsta->wmm_last_param_set)
237 return;
238 ifsta->wmm_last_param_set = count;
239
240 pos = wmm_param + 8;
241 left = wmm_param_len - 8;
242
243 memset(&params, 0, sizeof(params));
244
245 if (!local->ops->conf_tx)
246 return;
247
248 local->wmm_acm = 0;
249 for (; left >= 4; left -= 4, pos += 4) {
250 int aci = (pos[0] >> 5) & 0x03;
251 int acm = (pos[0] >> 4) & 0x01;
252 int queue;
253
254 switch (aci) {
255 case 1:
256 queue = IEEE80211_TX_QUEUE_DATA3;
257 if (acm) {
258 local->wmm_acm |= BIT(0) | BIT(3);
259 }
260 break;
261 case 2:
262 queue = IEEE80211_TX_QUEUE_DATA1;
263 if (acm) {
264 local->wmm_acm |= BIT(4) | BIT(5);
265 }
266 break;
267 case 3:
268 queue = IEEE80211_TX_QUEUE_DATA0;
269 if (acm) {
270 local->wmm_acm |= BIT(6) | BIT(7);
271 }
272 break;
273 case 0:
274 default:
275 queue = IEEE80211_TX_QUEUE_DATA2;
276 if (acm) {
277 local->wmm_acm |= BIT(1) | BIT(2);
278 }
279 break;
280 }
281
282 params.aifs = pos[0] & 0x0f;
283 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
284 params.cw_min = ecw2cw(pos[1] & 0x0f);
3330d7be
JB		 285 params.txop = pos[2] | (pos[3] << 8);
286#ifdef CONFIG_MAC80211_DEBUG
f0706e82 287 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 288 "cWmin=%d cWmax=%d txop=%d\n",
f0706e82 289 dev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 290 params.cw_max, params.txop);
291#endif
f0706e82
JB		 292 /* TODO: handle ACM (block TX, fallback to next lowest allowed
293 * AC for now) */
294 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
295 printk(KERN_DEBUG "%s: failed to set TX queue "
296 "parameters for queue %d\n", dev->name, queue);
297 }
298 }
299}
300
301
471b3efd
JB		 302static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
303 u8 erp_value)
5628221c 304{
471b3efd 305 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
5628221c 306 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
471b3efd
JB		 307 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
308 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
0795af57 309 DECLARE_MAC_BUF(mac);
471b3efd 310 u32 changed = 0;
5628221c 311
471b3efd 312 if (use_protection != bss_conf->use_cts_prot) {
5628221c
DD		 313 if (net_ratelimit()) {
314 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 315 "%s)\n",
471b3efd 316 sdata->dev->name,
5628221c 317 use_protection ? "enabled" : "disabled",
0795af57 318 print_mac(mac, ifsta->bssid));
5628221c 319 }
471b3efd
JB		 320 bss_conf->use_cts_prot = use_protection;
321 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 322 }
7e9ed188 323
471b3efd 324 if (preamble_mode != bss_conf->use_short_preamble) {
7e9ed188
DD		 325 if (net_ratelimit()) {
326 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 327 " (BSSID=%s)\n",
471b3efd 328 sdata->dev->name,
7e9ed188
DD		 329 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
330 "short" : "long",
0795af57 331 print_mac(mac, ifsta->bssid));
7e9ed188 332 }
471b3efd
JB		 333 bss_conf->use_short_preamble = preamble_mode;
334 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 335 }
d9430a32 336
471b3efd 337 return changed;
5628221c
DD		 338}
339
c7153508
RR		 340int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
341 struct ieee80211_ht_info *ht_info)
342{
343
344 if (ht_info == NULL)
345 return -EINVAL;
346
347 memset(ht_info, 0, sizeof(*ht_info));
348
349 if (ht_cap_ie) {
350 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
351
352 ht_info->ht_supported = 1;
353 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
354 ht_info->ampdu_factor =
355 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
356 ht_info->ampdu_density =
357 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
358 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
359 } else
360 ht_info->ht_supported = 0;
361
362 return 0;
363}
364
365int ieee80211_ht_addt_info_ie_to_ht_bss_info(
366 struct ieee80211_ht_addt_info *ht_add_info_ie,
367 struct ieee80211_ht_bss_info *bss_info)
368{
369 if (bss_info == NULL)
370 return -EINVAL;
371
372 memset(bss_info, 0, sizeof(*bss_info));
373
374 if (ht_add_info_ie) {
375 u16 op_mode;
376 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
377
378 bss_info->primary_channel = ht_add_info_ie->control_chan;
379 bss_info->bss_cap = ht_add_info_ie->ht_param;
380 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
381 }
382
383 return 0;
384}
5628221c 385
f0706e82
JB		 386static void ieee80211_sta_send_associnfo(struct net_device *dev,
387 struct ieee80211_if_sta *ifsta)
388{
389 char *buf;
390 size_t len;
391 int i;
392 union iwreq_data wrqu;
393
394 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
395 return;
396
397 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 398 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 399 if (!buf)
400 return;
401
402 len = sprintf(buf, "ASSOCINFO(");
403 if (ifsta->assocreq_ies) {
404 len += sprintf(buf + len, "ReqIEs=");
405 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
406 len += sprintf(buf + len, "%02x",
407 ifsta->assocreq_ies[i]);
408 }
409 }
410 if (ifsta->assocresp_ies) {
411 if (ifsta->assocreq_ies)
412 len += sprintf(buf + len, " ");
413 len += sprintf(buf + len, "RespIEs=");
414 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
415 len += sprintf(buf + len, "%02x",
416 ifsta->assocresp_ies[i]);
417 }
418 }
419 len += sprintf(buf + len, ")");
420
421 if (len > IW_CUSTOM_MAX) {
422 len = sprintf(buf, "ASSOCRESPIE=");
423 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
424 len += sprintf(buf + len, "%02x",
425 ifsta->assocresp_ies[i]);
426 }
427 }
428
429 memset(&wrqu, 0, sizeof(wrqu));
430 wrqu.data.length = len;
431 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
432
433 kfree(buf);
434}
435
436
437static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 438 struct ieee80211_if_sta *ifsta,
47f0c502 439 bool assoc)
f0706e82 440{
471b3efd
JB		 441 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
442 struct ieee80211_local *local = sdata->local;
f0706e82 443 union iwreq_data wrqu;
471b3efd 444 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 445
f0706e82 446 if (assoc) {
5628221c 447 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 448
449 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
450
51fb61e7 451 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 452 return;
5628221c 453
65c107ab 454 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 455 local->hw.conf.channel->center_freq,
cffdd30d 456 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 457 if (bss) {
458 if (bss->has_erp_value)
471b3efd
JB		 459 changed |= ieee80211_handle_erp_ie(
460 sdata, bss->erp_value);
5628221c
DD		 461 ieee80211_rx_bss_put(dev, bss);
462 }
463
f0706e82 464 netif_carrier_on(dev);
d6f2da5b 465 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 466 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
467 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
468 ieee80211_sta_send_associnfo(dev, ifsta);
469 } else {
d6f2da5b
JS		 470 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
471
f0706e82 472 netif_carrier_off(dev);
d9430a32 473 ieee80211_reset_erp_info(dev);
f0706e82
JB		 474 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
475 }
476 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
477 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
478 ifsta->last_probe = jiffies;
47f0c502 479 ieee80211_led_assoc(local, assoc);
471b3efd 480
b2205256 481 sdata->bss_conf.assoc = assoc;
471b3efd 482 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 483}
484
485static void ieee80211_set_disassoc(struct net_device *dev,
486 struct ieee80211_if_sta *ifsta, int deauth)
487{
488 if (deauth)
489 ifsta->auth_tries = 0;
490 ifsta->assoc_tries = 0;
491 ieee80211_set_associated(dev, ifsta, 0);
492}
493
ee385855
LCC		 494void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
495 int encrypt)
f0706e82
JB		 496{
497 struct ieee80211_sub_if_data *sdata;
498 struct ieee80211_tx_packet_data *pkt_data;
499
500 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
501 skb->dev = sdata->local->mdev;
502 skb_set_mac_header(skb, 0);
503 skb_set_network_header(skb, 0);
504 skb_set_transport_header(skb, 0);
505
506 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
507 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
508 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 509 if (!encrypt)
510 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 511
512 dev_queue_xmit(skb);
513}
514
515
516static void ieee80211_send_auth(struct net_device *dev,
517 struct ieee80211_if_sta *ifsta,
518 int transaction, u8 *extra, size_t extra_len,
519 int encrypt)
520{
521 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
522 struct sk_buff *skb;
523 struct ieee80211_mgmt *mgmt;
524
525 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
526 sizeof(*mgmt) + 6 + extra_len);
527 if (!skb) {
528 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
529 "frame\n", dev->name);
530 return;
531 }
532 skb_reserve(skb, local->hw.extra_tx_headroom);
533
534 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
535 memset(mgmt, 0, 24 + 6);
536 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
537 IEEE80211_STYPE_AUTH);
538 if (encrypt)
539 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
540 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
541 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
542 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
543 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
544 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
545 ifsta->auth_transaction = transaction + 1;
546 mgmt->u.auth.status_code = cpu_to_le16(0);
547 if (extra)
548 memcpy(skb_put(skb, extra_len), extra, extra_len);
549
550 ieee80211_sta_tx(dev, skb, encrypt);
551}
552
553
554static void ieee80211_authenticate(struct net_device *dev,
555 struct ieee80211_if_sta *ifsta)
556{
0795af57
JP		 557 DECLARE_MAC_BUF(mac);
558
f0706e82
JB		 559 ifsta->auth_tries++;
560 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 561 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 562 " timed out\n",
0795af57 563 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 564 ifsta->state = IEEE80211_DISABLED;
565 return;
566 }
567
568 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 569 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
570 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 571
572 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
573
574 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
575}
576
577
578static void ieee80211_send_assoc(struct net_device *dev,
579 struct ieee80211_if_sta *ifsta)
580{
581 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 582 struct sk_buff *skb;
583 struct ieee80211_mgmt *mgmt;
584 u8 *pos, *ies;
585 int i, len;
586 u16 capab;
587 struct ieee80211_sta_bss *bss;
588 int wmm = 0;
8318d78a 589 struct ieee80211_supported_band *sband;
f0706e82
JB		 590
591 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
592 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
593 ifsta->ssid_len);
594 if (!skb) {
595 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
596 "frame\n", dev->name);
597 return;
598 }
599 skb_reserve(skb, local->hw.extra_tx_headroom);
600
8318d78a
JB		 601 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
602
f0706e82 603 capab = ifsta->capab;
8318d78a
JB		 604
605 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
606 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
607 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
608 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
609 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 610 }
8318d78a
JB		 611
612 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
613 local->hw.conf.channel->center_freq,
cffdd30d 614 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 615 if (bss) {
616 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
617 capab |= WLAN_CAPABILITY_PRIVACY;
618 if (bss->wmm_ie) {
619 wmm = 1;
620 }
621 ieee80211_rx_bss_put(dev, bss);
622 }
623
624 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
625 memset(mgmt, 0, 24);
626 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
627 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
628 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
629
d6f2da5b 630 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 631 skb_put(skb, 10);
632 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
633 IEEE80211_STYPE_REASSOC_REQ);
634 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
635 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
636 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
637 ETH_ALEN);
638 } else {
639 skb_put(skb, 4);
640 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
641 IEEE80211_STYPE_ASSOC_REQ);
642 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
643 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
644 }
645
646 /* SSID */
647 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
648 *pos++ = WLAN_EID_SSID;
649 *pos++ = ifsta->ssid_len;
650 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
651
8318d78a 652 len = sband->n_bitrates;
f0706e82
JB		 653 if (len > 8)
654 len = 8;
655 pos = skb_put(skb, len + 2);
656 *pos++ = WLAN_EID_SUPP_RATES;
657 *pos++ = len;
658 for (i = 0; i < len; i++) {
8318d78a 659 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 660 *pos++ = (u8) (rate / 5);
661 }
662
8318d78a
JB		 663 if (sband->n_bitrates > len) {
664 pos = skb_put(skb, sband->n_bitrates - len + 2);
f0706e82 665 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8318d78a
JB		 666 *pos++ = sband->n_bitrates - len;
667 for (i = len; i < sband->n_bitrates; i++) {
668 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 669 *pos++ = (u8) (rate / 5);
670 }
671 }
672
673 if (ifsta->extra_ie) {
674 pos = skb_put(skb, ifsta->extra_ie_len);
675 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
676 }
677
d6f2da5b 678 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 679 pos = skb_put(skb, 9);
680 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
681 *pos++ = 7; /* len */
682 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
683 *pos++ = 0x50;
684 *pos++ = 0xf2;
685 *pos++ = 2; /* WME */
686 *pos++ = 0; /* WME info */
687 *pos++ = 1; /* WME ver */
688 *pos++ = 0;
689 }
c7153508 690 /* wmm support is a must to HT */
8318d78a
JB		 691 if (wmm && sband->ht_info.ht_supported) {
692 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
c7153508
RR		 693 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
694 *pos++ = WLAN_EID_HT_CAPABILITY;
695 *pos++ = sizeof(struct ieee80211_ht_cap);
696 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
697 memcpy(pos, &tmp, sizeof(u16));
698 pos += sizeof(u16);
8318d78a
JB		 699 /* TODO: needs a define here for << 2 */
700 *pos++ = sband->ht_info.ampdu_factor |
701 (sband->ht_info.ampdu_density << 2);
702 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 703 }
f0706e82
JB		 704
705 kfree(ifsta->assocreq_ies);
706 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 707 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 708 if (ifsta->assocreq_ies)
709 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
710
711 ieee80211_sta_tx(dev, skb, 0);
712}
713
714
715static void ieee80211_send_deauth(struct net_device *dev,
716 struct ieee80211_if_sta *ifsta, u16 reason)
717{
718 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
719 struct sk_buff *skb;
720 struct ieee80211_mgmt *mgmt;
721
722 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
723 if (!skb) {
724 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
725 "frame\n", dev->name);
726 return;
727 }
728 skb_reserve(skb, local->hw.extra_tx_headroom);
729
730 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
731 memset(mgmt, 0, 24);
732 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
733 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
734 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
735 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
736 IEEE80211_STYPE_DEAUTH);
737 skb_put(skb, 2);
738 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
739
740 ieee80211_sta_tx(dev, skb, 0);
741}
742
743
744static void ieee80211_send_disassoc(struct net_device *dev,
745 struct ieee80211_if_sta *ifsta, u16 reason)
746{
747 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
748 struct sk_buff *skb;
749 struct ieee80211_mgmt *mgmt;
750
751 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
752 if (!skb) {
753 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
754 "frame\n", dev->name);
755 return;
756 }
757 skb_reserve(skb, local->hw.extra_tx_headroom);
758
759 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
760 memset(mgmt, 0, 24);
761 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
762 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
763 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
764 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
765 IEEE80211_STYPE_DISASSOC);
766 skb_put(skb, 2);
767 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
768
769 ieee80211_sta_tx(dev, skb, 0);
770}
771
772
773static int ieee80211_privacy_mismatch(struct net_device *dev,
774 struct ieee80211_if_sta *ifsta)
775{
65c107ab 776 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 777 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 778 int bss_privacy;
779 int wep_privacy;
780 int privacy_invoked;
f0706e82 781
5b98b1f7 782 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 783 return 0;
784
8318d78a
JB		 785 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
786 local->hw.conf.channel->center_freq,
cffdd30d 787 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 788 if (!bss)
789 return 0;
790
5b98b1f7
JB		 791 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
792 wep_privacy = !!ieee80211_sta_wep_configured(dev);
793 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 794
795 ieee80211_rx_bss_put(dev, bss);
796
5b98b1f7
JB		 797 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
798 return 0;
799
800 return 1;
f0706e82
JB		 801}
802
803
804static void ieee80211_associate(struct net_device *dev,
805 struct ieee80211_if_sta *ifsta)
806{
0795af57
JP		 807 DECLARE_MAC_BUF(mac);
808
f0706e82
JB		 809 ifsta->assoc_tries++;
810 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 811 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 812 " timed out\n",
0795af57 813 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 814 ifsta->state = IEEE80211_DISABLED;
815 return;
816 }
817
818 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 819 printk(KERN_DEBUG "%s: associate with AP %s\n",
820 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 821 if (ieee80211_privacy_mismatch(dev, ifsta)) {
822 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
823 "mixed-cell disabled - abort association\n", dev->name);
824 ifsta->state = IEEE80211_DISABLED;
825 return;
826 }
827
828 ieee80211_send_assoc(dev, ifsta);
829
830 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
831}
832
833
834static void ieee80211_associated(struct net_device *dev,
835 struct ieee80211_if_sta *ifsta)
836{
837 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
838 struct sta_info *sta;
839 int disassoc;
0795af57 840 DECLARE_MAC_BUF(mac);
f0706e82
JB		 841
842 /* TODO: start monitoring current AP signal quality and number of
843 * missed beacons. Scan other channels every now and then and search
844 * for better APs. */
845 /* TODO: remove expired BSSes */
846
847 ifsta->state = IEEE80211_ASSOCIATED;
848
d0709a65
JB		 849 rcu_read_lock();
850
f0706e82
JB		 851 sta = sta_info_get(local, ifsta->bssid);
852 if (!sta) {
0795af57
JP		 853 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
854 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 855 disassoc = 1;
856 } else {
857 disassoc = 0;
858 if (time_after(jiffies,
859 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 860 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 861 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 862 "current AP %s - assume out of "
f0706e82 863 "range\n",
0795af57 864 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 865 disassoc = 1;
d0709a65 866 sta_info_unlink(&sta);
d6f2da5b 867 } else
f0706e82
JB		 868 ieee80211_send_probe_req(dev, ifsta->bssid,
869 local->scan_ssid,
870 local->scan_ssid_len);
d6f2da5b 871 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 872 } else {
d6f2da5b 873 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 874 if (time_after(jiffies, ifsta->last_probe +
875 IEEE80211_PROBE_INTERVAL)) {
876 ifsta->last_probe = jiffies;
877 ieee80211_send_probe_req(dev, ifsta->bssid,
878 ifsta->ssid,
879 ifsta->ssid_len);
880 }
881 }
f0706e82 882 }
d0709a65
JB		 883
884 rcu_read_unlock();
885
886 if (disassoc && sta) {
887 synchronize_rcu();
888 rtnl_lock();
889 sta_info_destroy(sta);
890 rtnl_unlock();
891 }
892
f0706e82 893 if (disassoc) {
2d192d95
MW		 894 ifsta->state = IEEE80211_DISABLED;
895 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 896 } else {
897 mod_timer(&ifsta->timer, jiffies +
898 IEEE80211_MONITORING_INTERVAL);
899 }
900}
901
902
903static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
904 u8 *ssid, size_t ssid_len)
905{
906 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 907 struct ieee80211_supported_band *sband;
f0706e82
JB		 908 struct sk_buff *skb;
909 struct ieee80211_mgmt *mgmt;
910 u8 *pos, *supp_rates, *esupp_rates = NULL;
911 int i;
912
913 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
914 if (!skb) {
915 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
916 "request\n", dev->name);
917 return;
918 }
919 skb_reserve(skb, local->hw.extra_tx_headroom);
920
921 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
922 memset(mgmt, 0, 24);
923 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
924 IEEE80211_STYPE_PROBE_REQ);
925 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
926 if (dst) {
927 memcpy(mgmt->da, dst, ETH_ALEN);
928 memcpy(mgmt->bssid, dst, ETH_ALEN);
929 } else {
930 memset(mgmt->da, 0xff, ETH_ALEN);
931 memset(mgmt->bssid, 0xff, ETH_ALEN);
932 }
933 pos = skb_put(skb, 2 + ssid_len);
934 *pos++ = WLAN_EID_SSID;
935 *pos++ = ssid_len;
936 memcpy(pos, ssid, ssid_len);
937
938 supp_rates = skb_put(skb, 2);
939 supp_rates[0] = WLAN_EID_SUPP_RATES;
940 supp_rates[1] = 0;
8318d78a
JB		 941 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
942
943 for (i = 0; i < sband->n_bitrates; i++) {
944 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 945 if (esupp_rates) {
946 pos = skb_put(skb, 1);
947 esupp_rates[1]++;
948 } else if (supp_rates[1] == 8) {
949 esupp_rates = skb_put(skb, 3);
950 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
951 esupp_rates[1] = 1;
952 pos = &esupp_rates[2];
953 } else {
954 pos = skb_put(skb, 1);
955 supp_rates[1]++;
956 }
8318d78a 957 *pos = rate->bitrate / 5;
f0706e82
JB		 958 }
959
960 ieee80211_sta_tx(dev, skb, 0);
961}
962
963
964static int ieee80211_sta_wep_configured(struct net_device *dev)
965{
966 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
967 if (!sdata || !sdata->default_key ||
8f20fc24 968 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 969 return 0;
970 return 1;
971}
972
973
974static void ieee80211_auth_completed(struct net_device *dev,
975 struct ieee80211_if_sta *ifsta)
976{
977 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 978 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 979 ieee80211_associate(dev, ifsta);
980}
981
982
983static void ieee80211_auth_challenge(struct net_device *dev,
984 struct ieee80211_if_sta *ifsta,
985 struct ieee80211_mgmt *mgmt,
986 size_t len)
987{
988 u8 *pos;
989 struct ieee802_11_elems elems;
990
991 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
992 pos = mgmt->u.auth.variable;
67a4cce4 993 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 994 if (!elems.challenge) {
995 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
996 "frame\n", dev->name);
997 return;
998 }
999 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1000 elems.challenge_len + 2, 1);
1001}
1002
9f985b0e
RR		 1003static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1004 u8 dialog_token, u16 status, u16 policy,
1005 u16 buf_size, u16 timeout)
1006{
1007 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1008 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1009 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1010 struct sk_buff *skb;
1011 struct ieee80211_mgmt *mgmt;
1012 u16 capab;
1013
07db2183
RR		 1014 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1015 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1016 if (!skb) {
1017 printk(KERN_DEBUG "%s: failed to allocate buffer "
1018 "for addba resp frame\n", dev->name);
1019 return;
1020 }
1021
1022 skb_reserve(skb, local->hw.extra_tx_headroom);
1023 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1024 memset(mgmt, 0, 24);
1025 memcpy(mgmt->da, da, ETH_ALEN);
1026 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1027 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1028 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1029 else
1030 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1031 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1032 IEEE80211_STYPE_ACTION);
1033
1034 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1035 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1036 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1037 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1038
1039 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1040 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1041 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1042
1043 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1044 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1045 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1046
1047 ieee80211_sta_tx(dev, skb, 0);
1048
1049 return;
1050}
1051
eadc8d9e
RR		 1052void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1053 u16 tid, u8 dialog_token, u16 start_seq_num,
1054 u16 agg_size, u16 timeout)
1055{
1056 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1057 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1058 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1059 struct sk_buff *skb;
1060 struct ieee80211_mgmt *mgmt;
1061 u16 capab;
1062
1063 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1064 sizeof(mgmt->u.action.u.addba_req));
1065
1066
1067 if (!skb) {
1068 printk(KERN_ERR "%s: failed to allocate buffer "
1069 "for addba request frame\n", dev->name);
1070 return;
1071 }
1072 skb_reserve(skb, local->hw.extra_tx_headroom);
1073 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1074 memset(mgmt, 0, 24);
1075 memcpy(mgmt->da, da, ETH_ALEN);
1076 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1077 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1078 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1079 else
1080 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1081
1082 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1083 IEEE80211_STYPE_ACTION);
1084
1085 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1086
1087 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1088 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1089
1090 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1091 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1092 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1093 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1094
1095 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1096
1097 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1098 mgmt->u.action.u.addba_req.start_seq_num =
1099 cpu_to_le16(start_seq_num << 4);
1100
1101 ieee80211_sta_tx(dev, skb, 0);
1102}
1103
9f985b0e
RR		 1104static void ieee80211_sta_process_addba_request(struct net_device *dev,
1105 struct ieee80211_mgmt *mgmt,
1106 size_t len)
1107{
1108 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1109 struct ieee80211_hw *hw = &local->hw;
1110 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1111 struct sta_info *sta;
07db2183
RR		 1112 struct tid_ampdu_rx *tid_agg_rx;
1113 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1114 u8 dialog_token;
07db2183
RR		 1115 int ret = -EOPNOTSUPP;
1116 DECLARE_MAC_BUF(mac);
9f985b0e 1117
d0709a65
JB		 1118 rcu_read_lock();
1119
9f985b0e 1120 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1121 if (!sta) {
1122 rcu_read_unlock();
9f985b0e 1123 return;
d0709a65 1124 }
9f985b0e
RR		 1125
1126 /* extract session parameters from addba request frame */
1127 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1128 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1129 start_seq_num =
1130 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1131
1132 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1133 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1134 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1135 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1136
9f985b0e
RR		 1137 status = WLAN_STATUS_REQUEST_DECLINED;
1138
07db2183
RR		 1139 /* sanity check for incoming parameters:
1140 * check if configuration can support the BA policy
1141 * and if buffer size does not exceeds max value */
1142 if (((ba_policy != 1)
1143 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1144 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1145 status = WLAN_STATUS_INVALID_QOS_PARAM;
1146#ifdef CONFIG_MAC80211_HT_DEBUG
1147 if (net_ratelimit())
1148 printk(KERN_DEBUG "Block Ack Req with bad params from "
1149 "%s on tid %u. policy %d, buffer size %d\n",
1150 print_mac(mac, mgmt->sa), tid, ba_policy,
1151 buf_size);
1152#endif /* CONFIG_MAC80211_HT_DEBUG */
1153 goto end_no_lock;
1154 }
1155 /* determine default buffer size */
1156 if (buf_size == 0) {
8318d78a
JB		 1157 struct ieee80211_supported_band *sband;
1158
1159 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1160 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1161 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1162 }
1163
1164 tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
1165
1166 /* examine state machine */
1167 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1168
1169 if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
1170#ifdef CONFIG_MAC80211_HT_DEBUG
1171 if (net_ratelimit())
1172 printk(KERN_DEBUG "unexpected Block Ack Req from "
1173 "%s on tid %u\n",
1174 print_mac(mac, mgmt->sa), tid);
1175#endif /* CONFIG_MAC80211_HT_DEBUG */
1176 goto end;
1177 }
1178
1179 /* prepare reordering buffer */
1180 tid_agg_rx->reorder_buf =
1181 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1182 if (!tid_agg_rx->reorder_buf) {
1183 if (net_ratelimit())
1184 printk(KERN_ERR "can not allocate reordering buffer "
1185 "to tid %d\n", tid);
07db2183
RR		 1186 goto end;
1187 }
1188 memset(tid_agg_rx->reorder_buf, 0,
1189 buf_size * sizeof(struct sk_buf *));
1190
1191 if (local->ops->ampdu_action)
1192 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1193 sta->addr, tid, &start_seq_num);
07db2183
RR		 1194#ifdef CONFIG_MAC80211_HT_DEBUG
1195 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1196#endif /* CONFIG_MAC80211_HT_DEBUG */
1197
1198 if (ret) {
1199 kfree(tid_agg_rx->reorder_buf);
1200 goto end;
1201 }
1202
1203 /* change state and send addba resp */
1204 tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
1205 tid_agg_rx->dialog_token = dialog_token;
1206 tid_agg_rx->ssn = start_seq_num;
1207 tid_agg_rx->head_seq_num = start_seq_num;
1208 tid_agg_rx->buf_size = buf_size;
1209 tid_agg_rx->timeout = timeout;
1210 tid_agg_rx->stored_mpdu_num = 0;
1211 status = WLAN_STATUS_SUCCESS;
1212end:
1213 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1214
1215end_no_lock:
d0709a65
JB		 1216 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1217 dialog_token, status, 1, buf_size, timeout);
1218 rcu_read_unlock();
9f985b0e 1219}
f0706e82 1220
eadc8d9e
RR		 1221static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1222 struct ieee80211_mgmt *mgmt,
1223 size_t len)
1224{
1225 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1226 struct ieee80211_hw *hw = &local->hw;
1227 struct sta_info *sta;
1228 u16 capab;
1229 u16 tid;
1230 u8 *state;
1231
d0709a65
JB		 1232 rcu_read_lock();
1233
eadc8d9e 1234 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1235 if (!sta) {
1236 rcu_read_unlock();
eadc8d9e 1237 return;
d0709a65 1238 }
eadc8d9e
RR		 1239
1240 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1241 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1242
1243 state = &sta->ampdu_mlme.tid_tx[tid].state;
1244
1245 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1246
1247 if (mgmt->u.action.u.addba_resp.dialog_token !=
1248 sta->ampdu_mlme.tid_tx[tid].dialog_token) {
1249 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1250#ifdef CONFIG_MAC80211_HT_DEBUG
1251 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1252#endif /* CONFIG_MAC80211_HT_DEBUG */
d0709a65 1253 rcu_read_unlock();
eadc8d9e
RR		 1254 return;
1255 }
1256
1257 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid].addba_resp_timer);
1258#ifdef CONFIG_MAC80211_HT_DEBUG
1259 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1260#endif /* CONFIG_MAC80211_HT_DEBUG */
1261 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1262 == WLAN_STATUS_SUCCESS) {
1263 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1264 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1265 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1266 "%d\n", *state);
d0709a65 1267 rcu_read_unlock();
eadc8d9e
RR		 1268 return;
1269 }
1270
1271 if (*state & HT_ADDBA_RECEIVED_MSK)
1272 printk(KERN_DEBUG "double addBA response\n");
1273
1274 *state |= HT_ADDBA_RECEIVED_MSK;
1275 sta->ampdu_mlme.tid_tx[tid].addba_req_num = 0;
1276
1277 if (*state == HT_AGG_STATE_OPERATIONAL) {
1278 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1279 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1280 }
1281
1282 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1283 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1284 } else {
1285 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1286
1287 sta->ampdu_mlme.tid_tx[tid].addba_req_num++;
1288 /* this will allow the state check in stop_BA_session */
1289 *state = HT_AGG_STATE_OPERATIONAL;
1290 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1291 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1292 WLAN_BACK_INITIATOR);
1293 }
d0709a65 1294 rcu_read_unlock();
eadc8d9e
RR		 1295}
1296
1297void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1298 u16 initiator, u16 reason_code)
07db2183
RR		 1299{
1300 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1301 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1302 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1303 struct sk_buff *skb;
1304 struct ieee80211_mgmt *mgmt;
1305 u16 params;
1306
1307 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1308 sizeof(mgmt->u.action.u.delba));
1309
1310 if (!skb) {
1311 printk(KERN_ERR "%s: failed to allocate buffer "
1312 "for delba frame\n", dev->name);
1313 return;
1314 }
1315
1316 skb_reserve(skb, local->hw.extra_tx_headroom);
1317 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1318 memset(mgmt, 0, 24);
1319 memcpy(mgmt->da, da, ETH_ALEN);
1320 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1321 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1322 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1323 else
1324 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1325 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1326 IEEE80211_STYPE_ACTION);
1327
1328 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1329
1330 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1331 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1332 params = (u16)(initiator << 11); /* bit 11 initiator */
1333 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1334
1335 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1336 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1337
1338 ieee80211_sta_tx(dev, skb, 0);
1339}
1340
1341void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1342 u16 initiator, u16 reason)
1343{
1344 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1345 struct ieee80211_hw *hw = &local->hw;
1346 struct sta_info *sta;
b580781e 1347 int ret, i;
07db2183 1348
d0709a65
JB		 1349 rcu_read_lock();
1350
07db2183 1351 sta = sta_info_get(local, ra);
d0709a65
JB		 1352 if (!sta) {
1353 rcu_read_unlock();
07db2183 1354 return;
d0709a65 1355 }
07db2183
RR		 1356
1357 /* check if TID is in operational state */
1358 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1359 if (sta->ampdu_mlme.tid_rx[tid].state
1360 != HT_AGG_STATE_OPERATIONAL) {
1361 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
d0709a65 1362 rcu_read_unlock();
07db2183
RR		 1363 return;
1364 }
1365 sta->ampdu_mlme.tid_rx[tid].state =
1366 HT_AGG_STATE_REQ_STOP_BA_MSK |
1367 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1368 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1369
1370 /* stop HW Rx aggregation. ampdu_action existence
1371 * already verified in session init so we add the BUG_ON */
1372 BUG_ON(!local->ops->ampdu_action);
1373
1374 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1375 ra, tid, NULL);
07db2183
RR		 1376 if (ret)
1377 printk(KERN_DEBUG "HW problem - can not stop rx "
1378 "aggergation for tid %d\n", tid);
1379
1380 /* shutdown timer has not expired */
1381 if (initiator != WLAN_BACK_TIMER)
1382 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
1383 session_timer);
1384
1385 /* check if this is a self generated aggregation halt */
1386 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1387 ieee80211_send_delba(dev, ra, tid, 0, reason);
1388
1389 /* free the reordering buffer */
b580781e
RR		 1390 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid].buf_size; i++) {
1391 if (sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]) {
1392 /* release the reordered frames */
1393 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid].reorder_buf[i]);
1394 sta->ampdu_mlme.tid_rx[tid].stored_mpdu_num--;
1395 sta->ampdu_mlme.tid_rx[tid].reorder_buf[i] = NULL;
1396 }
1397 }
07db2183
RR		 1398 kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
1399
1400 sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
d0709a65 1401 rcu_read_unlock();
07db2183
RR		 1402}
1403
eadc8d9e 1404
688b88a4
RR		 1405static void ieee80211_sta_process_delba(struct net_device *dev,
1406 struct ieee80211_mgmt *mgmt, size_t len)
1407{
1408 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1409 struct sta_info *sta;
1410 u16 tid, params;
1411 u16 initiator;
1412 DECLARE_MAC_BUF(mac);
1413
d0709a65
JB		 1414 rcu_read_lock();
1415
688b88a4 1416 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1417 if (!sta) {
1418 rcu_read_unlock();
688b88a4 1419 return;
d0709a65 1420 }
688b88a4
RR		 1421
1422 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1423 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1424 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1425
1426#ifdef CONFIG_MAC80211_HT_DEBUG
1427 if (net_ratelimit())
d92684e6
RR		 1428 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1429 print_mac(mac, mgmt->sa),
1430 initiator ? "recipient" : "initiator", tid,
688b88a4
RR		 1431 mgmt->u.action.u.delba.reason_code);
1432#endif /* CONFIG_MAC80211_HT_DEBUG */
1433
1434 if (initiator == WLAN_BACK_INITIATOR)
1435 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1436 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1437 else { /* WLAN_BACK_RECIPIENT */
1438 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1439 sta->ampdu_mlme.tid_tx[tid].state =
1440 HT_AGG_STATE_OPERATIONAL;
1441 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1442 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1443 WLAN_BACK_RECIPIENT);
1444 }
d0709a65 1445 rcu_read_unlock();
688b88a4
RR		 1446}
1447
eadc8d9e
RR		 1448/*
1449 * After sending add Block Ack request we activated a timer until
1450 * add Block Ack response will arrive from the recipient.
1451 * If this timer expires sta_addba_resp_timer_expired will be executed.
1452 */
1453void sta_addba_resp_timer_expired(unsigned long data)
1454{
1455 /* not an elegant detour, but there is no choice as the timer passes
1456 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1457 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e
RR		 1458 * array gives the sta through container_of */
1459 u16 tid = *(int *)data;
1460 struct sta_info *temp_sta = container_of((void *)data,
1461 struct sta_info, timer_to_tid[tid]);
1462
1463 struct ieee80211_local *local = temp_sta->local;
1464 struct ieee80211_hw *hw = &local->hw;
1465 struct sta_info *sta;
1466 u8 *state;
1467
d0709a65
JB		 1468 rcu_read_lock();
1469
eadc8d9e 1470 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1471 if (!sta) {
1472 rcu_read_unlock();
eadc8d9e 1473 return;
d0709a65 1474 }
eadc8d9e
RR		 1475
1476 state = &sta->ampdu_mlme.tid_tx[tid].state;
1477 /* check if the TID waits for addBA response */
1478 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1479 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1480 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1481 *state = HT_AGG_STATE_IDLE;
1482 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1483 "expecting addBA response there", tid);
1484 goto timer_expired_exit;
1485 }
1486
1487 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1488
1489 /* go through the state check in stop_BA_session */
1490 *state = HT_AGG_STATE_OPERATIONAL;
1491 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1492 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1493 WLAN_BACK_INITIATOR);
1494
1495timer_expired_exit:
d0709a65 1496 rcu_read_unlock();
eadc8d9e
RR		 1497}
1498
07db2183
RR		 1499/*
1500 * After receiving Block Ack Request (BAR) we activated a
1501 * timer after each frame arrives from the originator.
1502 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1503 */
1504void sta_rx_agg_session_timer_expired(unsigned long data)
1505{
1506 /* not an elegant detour, but there is no choice as the timer passes
1507 * only one argument, and verious sta_info are needed here, so init
73651ee6 1508 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1509 * array gives the sta through container_of */
1510 u8 *ptid = (u8 *)data;
1511 u8 *timer_to_id = ptid - *ptid;
1512 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1513 timer_to_tid[0]);
1514
1515 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
d0709a65
JB		 1516 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1517 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1518 WLAN_REASON_QSTA_TIMEOUT);
1519}
1520
1521
f0706e82
JB		 1522static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1523 struct ieee80211_if_sta *ifsta,
1524 struct ieee80211_mgmt *mgmt,
1525 size_t len)
1526{
1527 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1528 u16 auth_alg, auth_transaction, status_code;
0795af57 1529 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1530
1531 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1532 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1533 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1534 "%s, but not in authenticate state - ignored\n",
1535 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1536 return;
1537 }
1538
1539 if (len < 24 + 6) {
1540 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1541 "received from %s - ignored\n",
1542 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1543 return;
1544 }
1545
51fb61e7 1546 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1547 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1548 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1549 "unknown AP (SA=%s BSSID=%s) - "
1550 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1551 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1552 return;
1553 }
1554
51fb61e7 1555 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1556 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1557 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1558 "unknown BSSID (SA=%s BSSID=%s) - "
1559 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1560 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1561 return;
1562 }
1563
1564 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1565 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1566 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1567
0795af57 1568 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1569 "transaction=%d status=%d)\n",
0795af57 1570 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1571 auth_transaction, status_code);
1572
51fb61e7 1573 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1574 /* IEEE 802.11 standard does not require authentication in IBSS
1575 * networks and most implementations do not seem to use it.
1576 * However, try to reply to authentication attempts if someone
1577 * has actually implemented this.
1578 * TODO: Could implement shared key authentication. */
1579 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1580 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1581 "frame (alg=%d transaction=%d)\n",
1582 dev->name, auth_alg, auth_transaction);
1583 return;
1584 }
1585 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1586 }
1587
1588 if (auth_alg != ifsta->auth_alg ||
1589 auth_transaction != ifsta->auth_transaction) {
1590 printk(KERN_DEBUG "%s: unexpected authentication frame "
1591 "(alg=%d transaction=%d)\n",
1592 dev->name, auth_alg, auth_transaction);
1593 return;
1594 }
1595
1596 if (status_code != WLAN_STATUS_SUCCESS) {
1597 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1598 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1599 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1600 u8 algs[3];
1601 const int num_algs = ARRAY_SIZE(algs);
1602 int i, pos;
1603 algs[0] = algs[1] = algs[2] = 0xff;
1604 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1605 algs[0] = WLAN_AUTH_OPEN;
1606 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1607 algs[1] = WLAN_AUTH_SHARED_KEY;
1608 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1609 algs[2] = WLAN_AUTH_LEAP;
1610 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1611 pos = 0;
1612 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1613 pos = 1;
1614 else
1615 pos = 2;
1616 for (i = 0; i < num_algs; i++) {
1617 pos++;
1618 if (pos >= num_algs)
1619 pos = 0;
1620 if (algs[pos] == ifsta->auth_alg ||
1621 algs[pos] == 0xff)
1622 continue;
1623 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1624 !ieee80211_sta_wep_configured(dev))
1625 continue;
1626 ifsta->auth_alg = algs[pos];
1627 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1628 "next try\n",
1629 dev->name, ifsta->auth_alg);
1630 break;
1631 }
1632 }
1633 return;
1634 }
1635
1636 switch (ifsta->auth_alg) {
1637 case WLAN_AUTH_OPEN:
1638 case WLAN_AUTH_LEAP:
1639 ieee80211_auth_completed(dev, ifsta);
1640 break;
1641 case WLAN_AUTH_SHARED_KEY:
1642 if (ifsta->auth_transaction == 4)
1643 ieee80211_auth_completed(dev, ifsta);
1644 else
1645 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1646 break;
1647 }
1648}
1649
1650
1651static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1652 struct ieee80211_if_sta *ifsta,
1653 struct ieee80211_mgmt *mgmt,
1654 size_t len)
1655{
1656 u16 reason_code;
0795af57 1657 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1658
1659 if (len < 24 + 2) {
1660 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1661 "received from %s - ignored\n",
1662 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1663 return;
1664 }
1665
1666 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1667 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1668 "unknown AP (SA=%s BSSID=%s) - "
1669 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1670 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1671 return;
1672 }
1673
1674 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1675
0795af57 1676 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1677 " (reason=%d)\n",
0795af57 1678 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1679
d6f2da5b 1680 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1681 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1682 }
1683
1684 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1685 ifsta->state == IEEE80211_ASSOCIATE ||
1686 ifsta->state == IEEE80211_ASSOCIATED) {
1687 ifsta->state = IEEE80211_AUTHENTICATE;
1688 mod_timer(&ifsta->timer, jiffies +
1689 IEEE80211_RETRY_AUTH_INTERVAL);
1690 }
1691
1692 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1693 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1694}
1695
1696
1697static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1698 struct ieee80211_if_sta *ifsta,
1699 struct ieee80211_mgmt *mgmt,
1700 size_t len)
1701{
1702 u16 reason_code;
0795af57 1703 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1704
1705 if (len < 24 + 2) {
1706 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1707 "received from %s - ignored\n",
1708 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1709 return;
1710 }
1711
1712 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1713 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1714 "unknown AP (SA=%s BSSID=%s) - "
1715 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1716 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1717 return;
1718 }
1719
1720 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1721
0795af57 1722 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1723 " (reason=%d)\n",
0795af57 1724 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1725
d6f2da5b 1726 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1727 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1728
1729 if (ifsta->state == IEEE80211_ASSOCIATED) {
1730 ifsta->state = IEEE80211_ASSOCIATE;
1731 mod_timer(&ifsta->timer, jiffies +
1732 IEEE80211_RETRY_AUTH_INTERVAL);
1733 }
1734
1735 ieee80211_set_disassoc(dev, ifsta, 0);
1736}
1737
1738
471b3efd 1739static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1740 struct ieee80211_if_sta *ifsta,
1741 struct ieee80211_mgmt *mgmt,
1742 size_t len,
1743 int reassoc)
1744{
471b3efd
JB		 1745 struct ieee80211_local *local = sdata->local;
1746 struct net_device *dev = sdata->dev;
8318d78a 1747 struct ieee80211_supported_band *sband;
f0706e82 1748 struct sta_info *sta;
8318d78a 1749 u64 rates, basic_rates;
f0706e82
JB		 1750 u16 capab_info, status_code, aid;
1751 struct ieee802_11_elems elems;
471b3efd 1752 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1753 u8 *pos;
1754 int i, j;
0795af57 1755 DECLARE_MAC_BUF(mac);
8318d78a 1756 bool have_higher_than_11mbit = false;
f0706e82
JB		 1757
1758 /* AssocResp and ReassocResp have identical structure, so process both
1759 * of them in this function. */
1760
1761 if (ifsta->state != IEEE80211_ASSOCIATE) {
1762 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1763 "%s, but not in associate state - ignored\n",
1764 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1765 return;
1766 }
1767
1768 if (len < 24 + 6) {
1769 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1770 "received from %s - ignored\n",
1771 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1772 return;
1773 }
1774
1775 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1776 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1777 "unknown AP (SA=%s BSSID=%s) - "
1778 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1779 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1780 return;
1781 }
1782
1783 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1784 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1785 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1786
0795af57 1787 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1788 "status=%d aid=%d)\n",
0795af57 1789 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1790 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1791
1792 if (status_code != WLAN_STATUS_SUCCESS) {
1793 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1794 dev->name, status_code);
8a69aa93
DD		 1795 /* if this was a reassociation, ensure we try a "full"
1796 * association next time. This works around some broken APs
1797 * which do not correctly reject reassociation requests. */
d6f2da5b 1798 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1799 return;
1800 }
1801
1dd84aa2
JB		 1802 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1803 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1804 "set\n", dev->name, aid);
1805 aid &= ~(BIT(15) | BIT(14));
1806
f0706e82 1807 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1808 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1809
1810 if (!elems.supp_rates) {
1811 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1812 dev->name);
1813 return;
1814 }
1815
1816 printk(KERN_DEBUG "%s: associated\n", dev->name);
1817 ifsta->aid = aid;
1818 ifsta->ap_capab = capab_info;
1819
1820 kfree(ifsta->assocresp_ies);
1821 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1822 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1823 if (ifsta->assocresp_ies)
1824 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1825
d0709a65
JB		 1826 rcu_read_lock();
1827
f0706e82
JB		 1828 /* Add STA entry for the AP */
1829 sta = sta_info_get(local, ifsta->bssid);
1830 if (!sta) {
1831 struct ieee80211_sta_bss *bss;
73651ee6 1832 int err;
d0709a65 1833
73651ee6
JB		 1834 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1835 if (!sta) {
1836 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1837 " the AP\n", dev->name);
d0709a65 1838 rcu_read_unlock();
f0706e82
JB		 1839 return;
1840 }
65c107ab 1841 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 1842 local->hw.conf.channel->center_freq,
cffdd30d 1843 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1844 if (bss) {
1845 sta->last_rssi = bss->rssi;
1846 sta->last_signal = bss->signal;
1847 sta->last_noise = bss->noise;
1848 ieee80211_rx_bss_put(dev, bss);
1849 }
73651ee6
JB		 1850
1851 err = sta_info_insert(sta);
1852 if (err) {
1853 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1854 " the AP (error %d)\n", dev->name, err);
1855 sta_info_destroy(sta);
1856 rcu_read_unlock();
1857 return;
1858 }
f0706e82
JB		 1859 }
1860
73651ee6
JB		 1861 /*
1862 * FIXME: Do we really need to update the sta_info's information here?
1863 * We already know about the AP (we found it in our list) so it
1864 * should already be filled with the right info, no?
1865 * As is stands, all this is racy because typically we assume
1866 * the information that is filled in here (except flags) doesn't
1867 * change while a STA structure is alive. As such, it should move
1868 * to between the sta_info_alloc() and sta_info_insert() above.
1869 */
1870
238814fd
JB		 1871 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1872 WLAN_STA_AUTHORIZED;
f0706e82
JB		 1873
1874 rates = 0;
8318d78a
JB		 1875 basic_rates = 0;
1876 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1877
f0706e82
JB		 1878 for (i = 0; i < elems.supp_rates_len; i++) {
1879 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1880
1881 if (rate > 110)
1882 have_higher_than_11mbit = true;
1883
1884 for (j = 0; j < sband->n_bitrates; j++) {
1885 if (sband->bitrates[j].bitrate == rate)
f0706e82 1886 rates |= BIT(j);
8318d78a
JB		 1887 if (elems.supp_rates[i] & 0x80)
1888 basic_rates |= BIT(j);
1889 }
f0706e82 1890 }
8318d78a 1891
f0706e82
JB		 1892 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1893 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1894
1895 if (rate > 110)
1896 have_higher_than_11mbit = true;
1897
1898 for (j = 0; j < sband->n_bitrates; j++) {
1899 if (sband->bitrates[j].bitrate == rate)
f0706e82 1900 rates |= BIT(j);
8318d78a
JB		 1901 if (elems.ext_supp_rates[i] & 0x80)
1902 basic_rates |= BIT(j);
1903 }
f0706e82 1904 }
8318d78a
JB		 1905
1906 sta->supp_rates[local->hw.conf.channel->band] = rates;
1907 sdata->basic_rates = basic_rates;
1908
1909 /* cf. IEEE 802.11 9.2.12 */
1910 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1911 have_higher_than_11mbit)
1912 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1913 else
1914 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 1915
d3c990fb
RR		 1916 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
1917 local->ops->conf_ht) {
1918 struct ieee80211_ht_bss_info bss_info;
1919
1920 ieee80211_ht_cap_ie_to_ht_info(
1921 (struct ieee80211_ht_cap *)
1922 elems.ht_cap_elem, &sta->ht_info);
1923 ieee80211_ht_addt_info_ie_to_ht_bss_info(
1924 (struct ieee80211_ht_addt_info *)
1925 elems.ht_info_elem, &bss_info);
1926 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
1927 }
1928
f0706e82
JB		 1929 rate_control_rate_init(sta, local);
1930
d6f2da5b 1931 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82 1932 sta->flags |= WLAN_STA_WME;
e5f98f2d 1933 rcu_read_unlock();
f0706e82
JB		 1934 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
1935 elems.wmm_param_len);
e5f98f2d
JB		 1936 } else
1937 rcu_read_unlock();
f0706e82 1938
8318d78a
JB		 1939 /* set AID, ieee80211_set_associated() will tell the driver */
1940 bss_conf->aid = aid;
1941 ieee80211_set_associated(dev, ifsta, 1);
f0706e82 1942
f0706e82
JB		 1943 ieee80211_associated(dev, ifsta);
1944}
1945
1946
1947/* Caller must hold local->sta_bss_lock */
1948static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
1949 struct ieee80211_sta_bss *bss)
1950{
1951 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 1952 u8 hash_idx;
902acc78
JB		 1953
1954 if (bss_mesh_cfg(bss))
1955 hash_idx = mesh_id_hash(bss_mesh_id(bss),
1956 bss_mesh_id_len(bss));
f709fc69 1957 else
f709fc69 1958 hash_idx = STA_HASH(bss->bssid);
902acc78 1959
f709fc69
LCC		 1960 bss->hnext = local->sta_bss_hash[hash_idx];
1961 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 1962}
1963
1964
1965/* Caller must hold local->sta_bss_lock */
1966static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
1967 struct ieee80211_sta_bss *bss)
1968{
1969 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1970 struct ieee80211_sta_bss *b, *prev = NULL;
1971 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
1972 while (b) {
1973 if (b == bss) {
1974 if (!prev)
1975 local->sta_bss_hash[STA_HASH(bss->bssid)] =
1976 bss->hnext;
1977 else
1978 prev->hnext = bss->hnext;
1979 break;
1980 }
1981 prev = b;
1982 b = b->hnext;
1983 }
1984}
1985
1986
1987static struct ieee80211_sta_bss *
8318d78a 1988ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 1989 u8 *ssid, u8 ssid_len)
f0706e82
JB		 1990{
1991 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1992 struct ieee80211_sta_bss *bss;
1993
dd00cc48 1994 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 1995 if (!bss)
1996 return NULL;
f0706e82
JB		 1997 atomic_inc(&bss->users);
1998 atomic_inc(&bss->users);
1999 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2000 bss->freq = freq;
cffdd30d
JL		 2001 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2002 memcpy(bss->ssid, ssid, ssid_len);
2003 bss->ssid_len = ssid_len;
2004 }
f0706e82
JB		 2005
2006 spin_lock_bh(&local->sta_bss_lock);
2007 /* TODO: order by RSSI? */
2008 list_add_tail(&bss->list, &local->sta_bss_list);
2009 __ieee80211_rx_bss_hash_add(dev, bss);
2010 spin_unlock_bh(&local->sta_bss_lock);
2011 return bss;
2012}
2013
f0706e82 2014static struct ieee80211_sta_bss *
8318d78a 2015ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2016 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2017{
2018 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2019 struct ieee80211_sta_bss *bss;
2020
2021 spin_lock_bh(&local->sta_bss_lock);
2022 bss = local->sta_bss_hash[STA_HASH(bssid)];
2023 while (bss) {
902acc78
JB		 2024 if (!bss_mesh_cfg(bss) &&
2025 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2026 bss->freq == freq &&
cffdd30d
JL		 2027 bss->ssid_len == ssid_len &&
2028 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2029 atomic_inc(&bss->users);
2030 break;
2031 }
2032 bss = bss->hnext;
2033 }
2034 spin_unlock_bh(&local->sta_bss_lock);
2035 return bss;
2036}
2037
f709fc69
LCC		 2038#ifdef CONFIG_MAC80211_MESH
2039static struct ieee80211_sta_bss *
2040ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2041 u8 *mesh_cfg, int freq)
2042{
2043 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2044 struct ieee80211_sta_bss *bss;
2045
2046 spin_lock_bh(&local->sta_bss_lock);
2047 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2048 while (bss) {
902acc78
JB		 2049 if (bss_mesh_cfg(bss) &&
2050 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2051 bss->freq == freq &&
2052 mesh_id_len == bss->mesh_id_len &&
2053 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2054 mesh_id_len))) {
2055 atomic_inc(&bss->users);
2056 break;
2057 }
2058 bss = bss->hnext;
2059 }
2060 spin_unlock_bh(&local->sta_bss_lock);
2061 return bss;
2062}
2063
2064static struct ieee80211_sta_bss *
2065ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2066 u8 *mesh_cfg, int freq)
2067{
2068 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2069 struct ieee80211_sta_bss *bss;
2070
2071 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2072 if (!bss)
2073 return NULL;
2074
2075 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2076 if (!bss->mesh_cfg) {
2077 kfree(bss);
2078 return NULL;
2079 }
2080
2081 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2082 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2083 if (!bss->mesh_id) {
2084 kfree(bss->mesh_cfg);
2085 kfree(bss);
2086 return NULL;
2087 }
2088 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2089 }
2090
2091 atomic_inc(&bss->users);
2092 atomic_inc(&bss->users);
2093 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2094 bss->mesh_id_len = mesh_id_len;
2095 bss->freq = freq;
2096 spin_lock_bh(&local->sta_bss_lock);
2097 /* TODO: order by RSSI? */
2098 list_add_tail(&bss->list, &local->sta_bss_list);
2099 __ieee80211_rx_bss_hash_add(dev, bss);
2100 spin_unlock_bh(&local->sta_bss_lock);
2101 return bss;
2102}
2103#endif
f0706e82
JB		 2104
2105static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2106{
2107 kfree(bss->wpa_ie);
2108 kfree(bss->rsn_ie);
2109 kfree(bss->wmm_ie);
c7153508 2110 kfree(bss->ht_ie);
902acc78
JB		 2111 kfree(bss_mesh_id(bss));
2112 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2113 kfree(bss);
2114}
2115
2116
2117static void ieee80211_rx_bss_put(struct net_device *dev,
2118 struct ieee80211_sta_bss *bss)
2119{
2120 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2121 if (!atomic_dec_and_test(&bss->users))
2122 return;
2123
2124 spin_lock_bh(&local->sta_bss_lock);
2125 __ieee80211_rx_bss_hash_del(dev, bss);
2126 list_del(&bss->list);
2127 spin_unlock_bh(&local->sta_bss_lock);
2128 ieee80211_rx_bss_free(bss);
2129}
2130
2131
2132void ieee80211_rx_bss_list_init(struct net_device *dev)
2133{
2134 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2135 spin_lock_init(&local->sta_bss_lock);
2136 INIT_LIST_HEAD(&local->sta_bss_list);
2137}
2138
2139
2140void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2141{
2142 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2143 struct ieee80211_sta_bss *bss, *tmp;
2144
2145 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2146 ieee80211_rx_bss_put(dev, bss);
2147}
2148
2149
a607268a
BR		 2150static int ieee80211_sta_join_ibss(struct net_device *dev,
2151 struct ieee80211_if_sta *ifsta,
2152 struct ieee80211_sta_bss *bss)
2153{
2154 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2155 int res, rates, i, j;
2156 struct sk_buff *skb;
2157 struct ieee80211_mgmt *mgmt;
2158 struct ieee80211_tx_control control;
2159 struct rate_selection ratesel;
2160 u8 *pos;
2161 struct ieee80211_sub_if_data *sdata;
2162 struct ieee80211_supported_band *sband;
2163
2164 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2165
2166 /* Remove possible STA entries from other IBSS networks. */
2167 sta_info_flush(local, NULL);
2168
2169 if (local->ops->reset_tsf) {
2170 /* Reset own TSF to allow time synchronization work. */
2171 local->ops->reset_tsf(local_to_hw(local));
2172 }
2173 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2174 res = ieee80211_if_config(dev);
2175 if (res)
2176 return res;
2177
2178 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2179
2180 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2181 sdata->drop_unencrypted = bss->capability &
2182 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2183
2184 res = ieee80211_set_freq(local, bss->freq);
2185
2186 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2187 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2188 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2189 return -1;
2190 }
2191
2192 /* Set beacon template */
2193 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2194 do {
2195 if (!skb)
2196 break;
2197
2198 skb_reserve(skb, local->hw.extra_tx_headroom);
2199
2200 mgmt = (struct ieee80211_mgmt *)
2201 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2202 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2203 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2204 IEEE80211_STYPE_BEACON);
2205 memset(mgmt->da, 0xff, ETH_ALEN);
2206 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2207 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2208 mgmt->u.beacon.beacon_int =
2209 cpu_to_le16(local->hw.conf.beacon_int);
2210 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2211
2212 pos = skb_put(skb, 2 + ifsta->ssid_len);
2213 *pos++ = WLAN_EID_SSID;
2214 *pos++ = ifsta->ssid_len;
2215 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2216
2217 rates = bss->supp_rates_len;
2218 if (rates > 8)
2219 rates = 8;
2220 pos = skb_put(skb, 2 + rates);
2221 *pos++ = WLAN_EID_SUPP_RATES;
2222 *pos++ = rates;
2223 memcpy(pos, bss->supp_rates, rates);
2224
2225 if (bss->band == IEEE80211_BAND_2GHZ) {
2226 pos = skb_put(skb, 2 + 1);
2227 *pos++ = WLAN_EID_DS_PARAMS;
2228 *pos++ = 1;
2229 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2230 }
2231
2232 pos = skb_put(skb, 2 + 2);
2233 *pos++ = WLAN_EID_IBSS_PARAMS;
2234 *pos++ = 2;
2235 /* FIX: set ATIM window based on scan results */
2236 *pos++ = 0;
2237 *pos++ = 0;
2238
2239 if (bss->supp_rates_len > 8) {
2240 rates = bss->supp_rates_len - 8;
2241 pos = skb_put(skb, 2 + rates);
2242 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2243 *pos++ = rates;
2244 memcpy(pos, &bss->supp_rates[8], rates);
2245 }
2246
2247 memset(&control, 0, sizeof(control));
2248 rate_control_get_rate(dev, sband, skb, &ratesel);
2249 if (!ratesel.rate) {
2250 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2251 "for IBSS beacon\n", dev->name);
2252 break;
2253 }
2254 control.vif = &sdata->vif;
2255 control.tx_rate = ratesel.rate;
2256 if (sdata->bss_conf.use_short_preamble &&
2257 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2258 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2259 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2260 control.flags |= IEEE80211_TXCTL_NO_ACK;
2261 control.retry_limit = 1;
2262
2263 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2264 if (ifsta->probe_resp) {
2265 mgmt = (struct ieee80211_mgmt *)
2266 ifsta->probe_resp->data;
2267 mgmt->frame_control =
2268 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2269 IEEE80211_STYPE_PROBE_RESP);
2270 } else {
2271 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2272 "template for IBSS\n", dev->name);
2273 }
2274
2275 if (local->ops->beacon_update &&
2276 local->ops->beacon_update(local_to_hw(local),
2277 skb, &control) == 0) {
2278 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2279 "template\n", dev->name);
2280 skb = NULL;
2281 }
2282
2283 rates = 0;
2284 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2285 for (i = 0; i < bss->supp_rates_len; i++) {
2286 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2287 for (j = 0; j < sband->n_bitrates; j++)
2288 if (sband->bitrates[j].bitrate == bitrate)
2289 rates |= BIT(j);
2290 }
2291 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2292 } while (0);
2293
2294 if (skb) {
2295 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2296 "template\n", dev->name);
2297 dev_kfree_skb(skb);
2298 }
2299
2300 ifsta->state = IEEE80211_IBSS_JOINED;
2301 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2302
2303 ieee80211_rx_bss_put(dev, bss);
2304
2305 return res;
2306}
2307
f709fc69
LCC		 2308u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2309 struct ieee802_11_elems *elems,
2310 enum ieee80211_band band)
2311{
2312 struct ieee80211_supported_band *sband;
2313 struct ieee80211_rate *bitrates;
2314 size_t num_rates;
2315 u64 supp_rates;
2316 int i, j;
2317 sband = local->hw.wiphy->bands[band];
2318
2319 if (!sband) {
2320 WARN_ON(1);
2321 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2322 }
2323
2324 bitrates = sband->bitrates;
2325 num_rates = sband->n_bitrates;
2326 supp_rates = 0;
2327 for (i = 0; i < elems->supp_rates_len +
2328 elems->ext_supp_rates_len; i++) {
2329 u8 rate = 0;
2330 int own_rate;
2331 if (i < elems->supp_rates_len)
2332 rate = elems->supp_rates[i];
2333 else if (elems->ext_supp_rates)
2334 rate = elems->ext_supp_rates
2335 [i - elems->supp_rates_len];
2336 own_rate = 5 * (rate & 0x7f);
2337 for (j = 0; j < num_rates; j++)
2338 if (bitrates[j].bitrate == own_rate)
2339 supp_rates |= BIT(j);
2340 }
2341 return supp_rates;
2342}
2343
a607268a 2344
f0706e82
JB		 2345static void ieee80211_rx_bss_info(struct net_device *dev,
2346 struct ieee80211_mgmt *mgmt,
2347 size_t len,
2348 struct ieee80211_rx_status *rx_status,
2349 int beacon)
2350{
2351 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2352 struct ieee802_11_elems elems;
2353 size_t baselen;
8318d78a 2354 int freq, clen;
f0706e82
JB		 2355 struct ieee80211_sta_bss *bss;
2356 struct sta_info *sta;
2357 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2358 u64 beacon_timestamp, rx_timestamp;
fab7d4a2 2359 struct ieee80211_channel *channel;
0795af57
JP		 2360 DECLARE_MAC_BUF(mac);
2361 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2362
2363 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2364 return; /* ignore ProbeResp to foreign address */
2365
2366#if 0
0795af57 2367 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2368 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2369 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2370#endif
2371
2372 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2373 if (baselen > len)
2374 return;
2375
9d9bf77d 2376 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
67a4cce4 2377 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2378
902acc78
JB		 2379 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2380 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2381 u64 rates = ieee80211_sta_get_rates(local, &elems,
2382 rx_status->band);
2383
2384 mesh_neighbour_update(mgmt->sa, rates, dev,
2385 mesh_peer_accepts_plinks(&elems, dev));
2386 }
f709fc69 2387
d0709a65
JB		 2388 rcu_read_lock();
2389
51fb61e7 2390 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2391 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2392 (sta = sta_info_get(local, mgmt->sa))) {
f709fc69
LCC		 2393 u64 prev_rates;
2394 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2395 rx_status->band);
f0706e82 2396
8318d78a
JB		 2397 prev_rates = sta->supp_rates[rx_status->band];
2398 sta->supp_rates[rx_status->band] &= supp_rates;
2399 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2400 /* No matching rates - this should not really happen.
2401 * Make sure that at least one rate is marked
2402 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2403 sta->supp_rates[rx_status->band] =
2404 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2405 }
8318d78a 2406 if (sta->supp_rates[rx_status->band] != prev_rates) {
f0706e82 2407 printk(KERN_DEBUG "%s: updated supp_rates set for "
8318d78a
JB		 2408 "%s based on beacon info (0x%llx & 0x%llx -> "
2409 "0x%llx)\n",
2410 dev->name, print_mac(mac, sta->addr),
2411 (unsigned long long) prev_rates,
2412 (unsigned long long) supp_rates,
2413 (unsigned long long) sta->supp_rates[rx_status->band]);
f0706e82 2414 }
f0706e82
JB		 2415 }
2416
d0709a65
JB		 2417 rcu_read_unlock();
2418
f0706e82 2419 if (elems.ds_params && elems.ds_params_len == 1)
8318d78a 2420 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
f0706e82 2421 else
8318d78a 2422 freq = rx_status->freq;
f0706e82 2423
fab7d4a2
JB		 2424 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2425
2426 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2427 return;
2428
f709fc69
LCC		 2429#ifdef CONFIG_MAC80211_MESH
2430 if (elems.mesh_config)
2431 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2432 elems.mesh_id_len, elems.mesh_config, freq);
2433 else
2434#endif
2435 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
cffdd30d 2436 elems.ssid, elems.ssid_len);
f709fc69
LCC		 2437 if (!bss) {
2438#ifdef CONFIG_MAC80211_MESH
2439 if (elems.mesh_config)
2440 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2441 elems.mesh_id_len, elems.mesh_config, freq);
2442 else
2443#endif
2444 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2445 elems.ssid, elems.ssid_len);
f0706e82
JB		 2446 if (!bss)
2447 return;
2448 } else {
2449#if 0
2450 /* TODO: order by RSSI? */
2451 spin_lock_bh(&local->sta_bss_lock);
2452 list_move_tail(&bss->list, &local->sta_bss_list);
2453 spin_unlock_bh(&local->sta_bss_lock);
2454#endif
2455 }
2456
8318d78a
JB		 2457 bss->band = rx_status->band;
2458
9d9bf77d
BR		 2459 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2460 bss->probe_resp && beacon) {
2461 /* STA mode:
2462 * Do not allow beacon to override data from Probe Response. */
f0706e82
JB		 2463 ieee80211_rx_bss_put(dev, bss);
2464 return;
2465 }
2466
5628221c
DD		 2467 /* save the ERP value so that it is available at association time */
2468 if (elems.erp_info && elems.erp_info_len >= 1) {
2469 bss->erp_value = elems.erp_info[0];
2470 bss->has_erp_value = 1;
2471 }
2472
f0706e82
JB		 2473 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2474 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2475
2476 bss->supp_rates_len = 0;
2477 if (elems.supp_rates) {
2478 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2479 if (clen > elems.supp_rates_len)
2480 clen = elems.supp_rates_len;
2481 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2482 clen);
2483 bss->supp_rates_len += clen;
2484 }
2485 if (elems.ext_supp_rates) {
2486 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2487 if (clen > elems.ext_supp_rates_len)
2488 clen = elems.ext_supp_rates_len;
2489 memcpy(&bss->supp_rates[bss->supp_rates_len],
2490 elems.ext_supp_rates, clen);
2491 bss->supp_rates_len += clen;
2492 }
2493
2494 if (elems.wpa &&
2495 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2496 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2497 kfree(bss->wpa_ie);
2498 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2499 if (bss->wpa_ie) {
2500 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2501 bss->wpa_ie_len = elems.wpa_len + 2;
2502 } else
2503 bss->wpa_ie_len = 0;
2504 } else if (!elems.wpa && bss->wpa_ie) {
2505 kfree(bss->wpa_ie);
2506 bss->wpa_ie = NULL;
2507 bss->wpa_ie_len = 0;
2508 }
2509
2510 if (elems.rsn &&
2511 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2512 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2513 kfree(bss->rsn_ie);
2514 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2515 if (bss->rsn_ie) {
2516 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2517 bss->rsn_ie_len = elems.rsn_len + 2;
2518 } else
2519 bss->rsn_ie_len = 0;
2520 } else if (!elems.rsn && bss->rsn_ie) {
2521 kfree(bss->rsn_ie);
2522 bss->rsn_ie = NULL;
2523 bss->rsn_ie_len = 0;
2524 }
2525
2526 if (elems.wmm_param &&
2527 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2528 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2529 kfree(bss->wmm_ie);
2530 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2531 if (bss->wmm_ie) {
2532 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2533 elems.wmm_param_len + 2);
2534 bss->wmm_ie_len = elems.wmm_param_len + 2;
2535 } else
2536 bss->wmm_ie_len = 0;
2537 } else if (!elems.wmm_param && bss->wmm_ie) {
2538 kfree(bss->wmm_ie);
2539 bss->wmm_ie = NULL;
2540 bss->wmm_ie_len = 0;
2541 }
c7153508
RR		 2542 if (elems.ht_cap_elem &&
2543 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2544 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2545 kfree(bss->ht_ie);
2546 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2547 if (bss->ht_ie) {
2548 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2549 elems.ht_cap_elem_len + 2);
2550 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2551 } else
2552 bss->ht_ie_len = 0;
2553 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2554 kfree(bss->ht_ie);
2555 bss->ht_ie = NULL;
2556 bss->ht_ie_len = 0;
2557 }
f0706e82 2558
9d9bf77d 2559 bss->timestamp = beacon_timestamp;
f0706e82
JB		 2560 bss->last_update = jiffies;
2561 bss->rssi = rx_status->ssi;
2562 bss->signal = rx_status->signal;
2563 bss->noise = rx_status->noise;
2564 if (!beacon)
2565 bss->probe_resp++;
9d9bf77d
BR		 2566
2567 /* check if we need to merge IBSS */
2568 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2569 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2570 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d
BR		 2571 bss->freq == local->oper_channel->center_freq &&
2572 elems.ssid_len == sdata->u.sta.ssid_len &&
2573 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2574 if (rx_status->flag & RX_FLAG_TSFT) {
2575 /* in order for correct IBSS merging we need mactime
2576 *
2577 * since mactime is defined as the time the first data
2578 * symbol of the frame hits the PHY, and the timestamp
2579 * of the beacon is defined as "the time that the data
2580 * symbol containing the first bit of the timestamp is
2581 * transmitted to the PHY plus the transmitting STA’s
2582 * delays through its local PHY from the MAC-PHY
2583 * interface to its interface with the WM"
2584 * (802.11 11.1.2) - equals the time this bit arrives at
2585 * the receiver - we have to take into account the
2586 * offset between the two.
2587 * e.g: at 1 MBit that means mactime is 192 usec earlier
2588 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2589 */
2590 int rate = local->hw.wiphy->bands[rx_status->band]->
2591 bitrates[rx_status->rate_idx].bitrate;
2592 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2593 } else if (local && local->ops && local->ops->get_tsf)
2594 /* second best option: get current TSF */
2595 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2596 else
2597 /* can't merge without knowing the TSF */
2598 rx_timestamp = -1LLU;
2599#ifdef CONFIG_MAC80211_IBSS_DEBUG
2600 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2601 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2602 print_mac(mac, mgmt->sa),
2603 print_mac(mac2, mgmt->bssid),
2604 (unsigned long long)rx_timestamp,
2605 (unsigned long long)beacon_timestamp,
2606 (unsigned long long)(rx_timestamp - beacon_timestamp),
2607 jiffies);
2608#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2609 if (beacon_timestamp > rx_timestamp) {
fba4a1e6 2610#ifndef CONFIG_MAC80211_IBSS_DEBUG
d97cf015 2611 if (net_ratelimit())
fba4a1e6 2612#endif
9d9bf77d
BR		 2613 printk(KERN_DEBUG "%s: beacon TSF higher than "
2614 "local TSF - IBSS merge with BSSID %s\n",
2615 dev->name, print_mac(mac, mgmt->bssid));
2616 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2617 ieee80211_ibss_add_sta(dev, NULL,
2618 mgmt->bssid, mgmt->sa);
2619 }
2620 }
2621
f0706e82
JB		 2622 ieee80211_rx_bss_put(dev, bss);
2623}
2624
2625
2626static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2627 struct ieee80211_mgmt *mgmt,
2628 size_t len,
2629 struct ieee80211_rx_status *rx_status)
2630{
2631 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2632}
2633
2634
2635static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2636 struct ieee80211_mgmt *mgmt,
2637 size_t len,
2638 struct ieee80211_rx_status *rx_status)
2639{
f0706e82
JB		 2640 struct ieee80211_sub_if_data *sdata;
2641 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2642 size_t baselen;
2643 struct ieee802_11_elems elems;
d3c990fb
RR		 2644 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2645 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2646 u32 changed = 0;
f0706e82
JB		 2647
2648 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2649
2650 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2651 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2652 return;
2653 ifsta = &sdata->u.sta;
2654
d6f2da5b 2655 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2656 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2657 return;
2658
2659 /* Process beacon from the current BSS */
2660 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2661 if (baselen > len)
2662 return;
2663
67a4cce4 2664 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2665
5628221c 2666 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2667 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
f0706e82 2668
d3c990fb
RR		 2669 if (elems.ht_cap_elem && elems.ht_info_elem &&
2670 elems.wmm_param && local->ops->conf_ht &&
2671 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2672 struct ieee80211_ht_bss_info bss_info;
2673
2674 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2675 (struct ieee80211_ht_addt_info *)
2676 elems.ht_info_elem, &bss_info);
2677 /* check if AP changed bss inforamation */
2678 if ((conf->ht_bss_conf.primary_channel !=
2679 bss_info.primary_channel) ||
2680 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2681 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2682 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2683 &bss_info);
2684 }
2685
d6f2da5b 2686 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2687 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2688 elems.wmm_param_len);
2689 }
471b3efd
JB		 2690
2691 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2692}
2693
2694
2695static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2696 struct ieee80211_if_sta *ifsta,
2697 struct ieee80211_mgmt *mgmt,
2698 size_t len,
2699 struct ieee80211_rx_status *rx_status)
2700{
2701 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2702 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2703 int tx_last_beacon;
2704 struct sk_buff *skb;
2705 struct ieee80211_mgmt *resp;
2706 u8 *pos, *end;
0795af57
JP		 2707 DECLARE_MAC_BUF(mac);
2708#ifdef CONFIG_MAC80211_IBSS_DEBUG
2709 DECLARE_MAC_BUF(mac2);
2710 DECLARE_MAC_BUF(mac3);
2711#endif
f0706e82 2712
51fb61e7 2713 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2714 ifsta->state != IEEE80211_IBSS_JOINED ||
2715 len < 24 + 2 || !ifsta->probe_resp)
2716 return;
2717
2718 if (local->ops->tx_last_beacon)
2719 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2720 else
2721 tx_last_beacon = 1;
2722
2723#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2724 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2725 "%s (tx_last_beacon=%d)\n",
2726 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2727 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2728#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2729
2730 if (!tx_last_beacon)
2731 return;
2732
2733 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2734 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2735 return;
2736
2737 end = ((u8 *) mgmt) + len;
2738 pos = mgmt->u.probe_req.variable;
2739 if (pos[0] != WLAN_EID_SSID ||
2740 pos + 2 + pos[1] > end) {
2741 if (net_ratelimit()) {
2742 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2743 "from %s\n",
2744 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2745 }
2746 return;
2747 }
2748 if (pos[1] != 0 &&
2749 (pos[1] != ifsta->ssid_len ||
2750 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2751 /* Ignore ProbeReq for foreign SSID */
2752 return;
2753 }
2754
2755 /* Reply with ProbeResp */
0ec0b7ac 2756 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2757 if (!skb)
2758 return;
2759
2760 resp = (struct ieee80211_mgmt *) skb->data;
2761 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2762#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2763 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2764 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2765#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2766 ieee80211_sta_tx(dev, skb, 0);
2767}
2768
4e20cb29
JB		 2769static void ieee80211_rx_mgmt_action(struct net_device *dev,
2770 struct ieee80211_if_sta *ifsta,
2771 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2772 size_t len,
2773 struct ieee80211_rx_status *rx_status)
9f985b0e 2774{
f709fc69 2775 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f709fc69 2776
9f985b0e
RR		 2777 if (len < IEEE80211_MIN_ACTION_SIZE)
2778 return;
2779
2780 switch (mgmt->u.action.category) {
2781 case WLAN_CATEGORY_BACK:
2782 switch (mgmt->u.action.u.addba_req.action_code) {
2783 case WLAN_ACTION_ADDBA_REQ:
2784 if (len < (IEEE80211_MIN_ACTION_SIZE +
2785 sizeof(mgmt->u.action.u.addba_req)))
2786 break;
2787 ieee80211_sta_process_addba_request(dev, mgmt, len);
2788 break;
eadc8d9e
RR		 2789 case WLAN_ACTION_ADDBA_RESP:
2790 if (len < (IEEE80211_MIN_ACTION_SIZE +
2791 sizeof(mgmt->u.action.u.addba_resp)))
2792 break;
2793 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2794 break;
688b88a4
RR		 2795 case WLAN_ACTION_DELBA:
2796 if (len < (IEEE80211_MIN_ACTION_SIZE +
2797 sizeof(mgmt->u.action.u.delba)))
2798 break;
2799 ieee80211_sta_process_delba(dev, mgmt, len);
2800 break;
9f985b0e
RR		 2801 default:
2802 if (net_ratelimit())
688b88a4 2803 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2804 dev->name);
2805 break;
2806 }
2807 break;
f709fc69 2808 case PLINK_CATEGORY:
902acc78 2809 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2810 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2811 break;
f709fc69 2812 case MESH_PATH_SEL_CATEGORY:
902acc78 2813 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2814 mesh_rx_path_sel_frame(dev, mgmt, len);
2815 break;
9f985b0e 2816 default:
f709fc69
LCC		 2817 if (net_ratelimit())
2818 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2819 "category=%d\n", dev->name, mgmt->u.action.category);
9f985b0e
RR		 2820 break;
2821 }
2822}
f0706e82
JB		 2823
2824void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2825 struct ieee80211_rx_status *rx_status)
2826{
2827 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2828 struct ieee80211_sub_if_data *sdata;
2829 struct ieee80211_if_sta *ifsta;
2830 struct ieee80211_mgmt *mgmt;
2831 u16 fc;
2832
2833 if (skb->len < 24)
2834 goto fail;
2835
2836 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2837 ifsta = &sdata->u.sta;
2838
2839 mgmt = (struct ieee80211_mgmt *) skb->data;
2840 fc = le16_to_cpu(mgmt->frame_control);
2841
2842 switch (fc & IEEE80211_FCTL_STYPE) {
2843 case IEEE80211_STYPE_PROBE_REQ:
2844 case IEEE80211_STYPE_PROBE_RESP:
2845 case IEEE80211_STYPE_BEACON:
f709fc69 2846 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2847 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2848 case IEEE80211_STYPE_AUTH:
2849 case IEEE80211_STYPE_ASSOC_RESP:
2850 case IEEE80211_STYPE_REASSOC_RESP:
2851 case IEEE80211_STYPE_DEAUTH:
2852 case IEEE80211_STYPE_DISASSOC:
2853 skb_queue_tail(&ifsta->skb_queue, skb);
2854 queue_work(local->hw.workqueue, &ifsta->work);
2855 return;
2856 default:
2857 printk(KERN_DEBUG "%s: received unknown management frame - "
2858 "stype=%d\n", dev->name,
2859 (fc & IEEE80211_FCTL_STYPE) >> 4);
2860 break;
2861 }
2862
2863 fail:
2864 kfree_skb(skb);
2865}
2866
2867
2868static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2869 struct sk_buff *skb)
2870{
2871 struct ieee80211_rx_status *rx_status;
2872 struct ieee80211_sub_if_data *sdata;
2873 struct ieee80211_if_sta *ifsta;
2874 struct ieee80211_mgmt *mgmt;
2875 u16 fc;
2876
2877 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2878 ifsta = &sdata->u.sta;
2879
2880 rx_status = (struct ieee80211_rx_status *) skb->cb;
2881 mgmt = (struct ieee80211_mgmt *) skb->data;
2882 fc = le16_to_cpu(mgmt->frame_control);
2883
2884 switch (fc & IEEE80211_FCTL_STYPE) {
2885 case IEEE80211_STYPE_PROBE_REQ:
2886 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2887 rx_status);
2888 break;
2889 case IEEE80211_STYPE_PROBE_RESP:
2890 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2891 break;
2892 case IEEE80211_STYPE_BEACON:
2893 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2894 break;
2895 case IEEE80211_STYPE_AUTH:
2896 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2897 break;
2898 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2899 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2900 break;
2901 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2902 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2903 break;
2904 case IEEE80211_STYPE_DEAUTH:
2905 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2906 break;
2907 case IEEE80211_STYPE_DISASSOC:
2908 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2909 break;
9f985b0e 2910 case IEEE80211_STYPE_ACTION:
f709fc69 2911 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
9f985b0e 2912 break;
f0706e82
JB		 2913 }
2914
2915 kfree_skb(skb);
2916}
2917
2918
9ae54c84 2919ieee80211_rx_result
ece8eddd
ZY		 2920ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
2921 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2922{
2923 struct ieee80211_mgmt *mgmt;
2924 u16 fc;
2925
ece8eddd 2926 if (skb->len < 2)
e4c26add 2927 return RX_DROP_UNUSABLE;
f0706e82
JB		 2928
2929 mgmt = (struct ieee80211_mgmt *) skb->data;
2930 fc = le16_to_cpu(mgmt->frame_control);
2931
ece8eddd 2932 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
9ae54c84 2933 return RX_CONTINUE;
ece8eddd
ZY		 2934
2935 if (skb->len < 24)
e4c26add 2936 return RX_DROP_MONITOR;
ece8eddd 2937
f0706e82
JB		 2938 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2939 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
2940 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
2941 skb->len, rx_status);
ece8eddd 2942 dev_kfree_skb(skb);
9ae54c84 2943 return RX_QUEUED;
f0706e82
JB		 2944 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
2945 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
2946 rx_status);
ece8eddd 2947 dev_kfree_skb(skb);
9ae54c84 2948 return RX_QUEUED;
f0706e82
JB		 2949 }
2950 }
9ae54c84 2951 return RX_CONTINUE;
f0706e82
JB		 2952}
2953
2954
2955static int ieee80211_sta_active_ibss(struct net_device *dev)
2956{
2957 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2958 int active = 0;
2959 struct sta_info *sta;
d0709a65 2960 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 2961
d0709a65
JB		 2962 rcu_read_lock();
2963
2964 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2965 if (sta->sdata == sdata &&
f0706e82
JB		 2966 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2967 jiffies)) {
2968 active++;
2969 break;
2970 }
2971 }
d0709a65
JB		 2972
2973 rcu_read_unlock();
f0706e82
JB		 2974
2975 return active;
2976}
2977
2978
f709fc69 2979static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
f0706e82
JB		 2980{
2981 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2982 struct sta_info *sta, *tmp;
be8755e1 2983 LIST_HEAD(tmp_list);
0795af57 2984 DECLARE_MAC_BUF(mac);
d0709a65 2985 unsigned long flags;
f0706e82 2986
d0709a65 2987 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 2988 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 2989 if (time_after(jiffies, sta->last_rx + exp_time)) {
0795af57
JP		 2990 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
2991 dev->name, print_mac(mac, sta->addr));
d0709a65
JB		 2992 sta_info_unlink(&sta);
2993 if (sta)
2994 list_add(&sta->list, &tmp_list);
f0706e82 2995 }
d0709a65 2996 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 2997
d0709a65
JB		 2998 synchronize_rcu();
2999
3000 rtnl_lock();
3001 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3002 sta_info_destroy(sta);
3003 rtnl_unlock();
f0706e82
JB		 3004}
3005
3006
3007static void ieee80211_sta_merge_ibss(struct net_device *dev,
3008 struct ieee80211_if_sta *ifsta)
3009{
3010 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3011
f709fc69 3012 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
f0706e82
JB		 3013 if (ieee80211_sta_active_ibss(dev))
3014 return;
3015
3016 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3017 "IBSS networks with same SSID (merge)\n", dev->name);
3018 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3019}
3020
3021
f709fc69
LCC		 3022#ifdef CONFIG_MAC80211_MESH
3023static void ieee80211_mesh_housekeeping(struct net_device *dev,
3024 struct ieee80211_if_sta *ifsta)
3025{
3026 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3027 bool free_plinks;
3028
3029 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3030 mesh_path_expire(dev);
3031
3032 free_plinks = mesh_plink_availables(sdata);
3033 if (free_plinks != sdata->u.sta.accepting_plinks)
3034 ieee80211_if_config_beacon(dev);
3035
3036 mod_timer(&ifsta->timer, jiffies +
3037 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3038}
3039
3040
3041void ieee80211_start_mesh(struct net_device *dev)
3042{
3043 struct ieee80211_if_sta *ifsta;
3044 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3045 ifsta = &sdata->u.sta;
3046 ifsta->state = IEEE80211_MESH_UP;
3047 ieee80211_sta_timer((unsigned long)sdata);
3048}
3049#endif
3050
3051
f0706e82
JB		 3052void ieee80211_sta_timer(unsigned long data)
3053{
3054 struct ieee80211_sub_if_data *sdata =
3055 (struct ieee80211_sub_if_data *) data;
3056 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3057 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3058
3059 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3060 queue_work(local->hw.workqueue, &ifsta->work);
3061}
3062
f0706e82
JB		 3063void ieee80211_sta_work(struct work_struct *work)
3064{
3065 struct ieee80211_sub_if_data *sdata =
3066 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3067 struct net_device *dev = sdata->dev;
3068 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3069 struct ieee80211_if_sta *ifsta;
3070 struct sk_buff *skb;
3071
3072 if (!netif_running(dev))
3073 return;
3074
ece8eddd 3075 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3076 return;
3077
51fb61e7 3078 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
f709fc69
LCC		 3079 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3080 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
f0706e82 3081 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 3082 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 3083 return;
3084 }
3085 ifsta = &sdata->u.sta;
3086
3087 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3088 ieee80211_sta_rx_queued_mgmt(dev, skb);
3089
f709fc69 3090#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3091 if (ifsta->preq_queue_len &&
3092 time_after(jiffies,
3093 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f709fc69
LCC		 3094 mesh_path_start_discovery(dev);
3095#endif
3096
f0706e82
JB		 3097 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3098 ifsta->state != IEEE80211_ASSOCIATE &&
3099 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 3100 if (ifsta->scan_ssid_len)
3101 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3102 else
3103 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 3104 return;
3105 }
3106
3107 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3108 if (ieee80211_sta_config_auth(dev, ifsta))
3109 return;
3110 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3111 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3112 return;
3113
3114 switch (ifsta->state) {
3115 case IEEE80211_DISABLED:
3116 break;
3117 case IEEE80211_AUTHENTICATE:
3118 ieee80211_authenticate(dev, ifsta);
3119 break;
3120 case IEEE80211_ASSOCIATE:
3121 ieee80211_associate(dev, ifsta);
3122 break;
3123 case IEEE80211_ASSOCIATED:
3124 ieee80211_associated(dev, ifsta);
3125 break;
3126 case IEEE80211_IBSS_SEARCH:
3127 ieee80211_sta_find_ibss(dev, ifsta);
3128 break;
3129 case IEEE80211_IBSS_JOINED:
3130 ieee80211_sta_merge_ibss(dev, ifsta);
3131 break;
f709fc69
LCC		 3132#ifdef CONFIG_MAC80211_MESH
3133 case IEEE80211_MESH_UP:
3134 ieee80211_mesh_housekeeping(dev, ifsta);
3135 break;
3136#endif
f0706e82
JB		 3137 default:
3138 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3139 ifsta->state);
3140 break;
3141 }
3142
3143 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3144 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3145 "mixed-cell disabled - disassociate\n", dev->name);
3146
3147 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3148 ieee80211_set_disassoc(dev, ifsta, 0);
3149 }
3150}
3151
3152
3153static void ieee80211_sta_reset_auth(struct net_device *dev,
3154 struct ieee80211_if_sta *ifsta)
3155{
3156 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3157
3158 if (local->ops->reset_tsf) {
3159 /* Reset own TSF to allow time synchronization work. */
3160 local->ops->reset_tsf(local_to_hw(local));
3161 }
3162
3163 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3164
3165
3166 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3167 ifsta->auth_alg = WLAN_AUTH_OPEN;
3168 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3169 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3170 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3171 ifsta->auth_alg = WLAN_AUTH_LEAP;
3172 else
3173 ifsta->auth_alg = WLAN_AUTH_OPEN;
3174 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3175 ifsta->auth_alg);
3176 ifsta->auth_transaction = -1;
d6f2da5b
JS		 3177 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3178 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 3179 netif_carrier_off(dev);
3180}
3181
3182
3183void ieee80211_sta_req_auth(struct net_device *dev,
3184 struct ieee80211_if_sta *ifsta)
3185{
3186 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3187 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3188
51fb61e7 3189 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3190 return;
3191
d6f2da5b
JS		 3192 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3193 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3194 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3195 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3196 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3197 queue_work(local->hw.workqueue, &ifsta->work);
3198 }
3199}
3200
3201static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3202 const char *ssid, int ssid_len)
3203{
3204 int tmp, hidden_ssid;
3205
48225709
MW		 3206 if (ssid_len == ifsta->ssid_len &&
3207 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3208 return 1;
3209
d6f2da5b 3210 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3211 return 0;
3212
3213 hidden_ssid = 1;
3214 tmp = ssid_len;
3215 while (tmp--) {
3216 if (ssid[tmp] != '\0') {
3217 hidden_ssid = 0;
3218 break;
3219 }
3220 }
3221
3222 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3223 return 1;
3224
3225 if (ssid_len == 1 && ssid[0] == ' ')
3226 return 1;
3227
3228 return 0;
3229}
3230
3231static int ieee80211_sta_config_auth(struct net_device *dev,
3232 struct ieee80211_if_sta *ifsta)
3233{
3234 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3235 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3236 struct ieee80211_sta_bss *bss, *selected = NULL;
3237 int top_rssi = 0, freq;
3238
d6f2da5b
JS		 3239 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3240 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 3241 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3242 ieee80211_sta_reset_auth(dev, ifsta);
3243 return 0;
3244 }
3245
3246 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3247 freq = local->oper_channel->center_freq;
f0706e82
JB		 3248 list_for_each_entry(bss, &local->sta_bss_list, list) {
3249 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3250 continue;
3251
3252 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3253 !!sdata->default_key)
3254 continue;
3255
d6f2da5b
JS		 3256 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3257 bss->freq != freq)
f0706e82
JB		 3258 continue;
3259
d6f2da5b 3260 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3261 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3262 continue;
3263
d6f2da5b 3264 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3265 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3266 continue;
3267
3268 if (!selected || top_rssi < bss->rssi) {
3269 selected = bss;
3270 top_rssi = bss->rssi;
3271 }
3272 }
3273 if (selected)
3274 atomic_inc(&selected->users);
3275 spin_unlock_bh(&local->sta_bss_lock);
3276
3277 if (selected) {
8318d78a 3278 ieee80211_set_freq(local, selected->freq);
d6f2da5b 3279 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3280 ieee80211_sta_set_ssid(dev, selected->ssid,
3281 selected->ssid_len);
3282 ieee80211_sta_set_bssid(dev, selected->bssid);
3283 ieee80211_rx_bss_put(dev, selected);
3284 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3285 ieee80211_sta_reset_auth(dev, ifsta);
3286 return 0;
3287 } else {
3288 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3289 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3290 ieee80211_sta_start_scan(dev, NULL, 0);
3291 else
3292 ieee80211_sta_start_scan(dev, ifsta->ssid,
3293 ifsta->ssid_len);
f0706e82
JB		 3294 ifsta->state = IEEE80211_AUTHENTICATE;
3295 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3296 } else
3297 ifsta->state = IEEE80211_DISABLED;
3298 }
f0706e82
JB		 3299 return -1;
3300}
3301
f0706e82
JB		 3302
3303static int ieee80211_sta_create_ibss(struct net_device *dev,
3304 struct ieee80211_if_sta *ifsta)
3305{
3306 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3307 struct ieee80211_sta_bss *bss;
cffdd30d 3308 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3309 struct ieee80211_supported_band *sband;
f0706e82
JB		 3310 u8 bssid[ETH_ALEN], *pos;
3311 int i;
0795af57 3312 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3313
3314#if 0
3315 /* Easier testing, use fixed BSSID. */
3316 memset(bssid, 0xfe, ETH_ALEN);
3317#else
3318 /* Generate random, not broadcast, locally administered BSSID. Mix in
3319 * own MAC address to make sure that devices that do not have proper
3320 * random number generator get different BSSID. */
3321 get_random_bytes(bssid, ETH_ALEN);
3322 for (i = 0; i < ETH_ALEN; i++)
3323 bssid[i] ^= dev->dev_addr[i];
3324 bssid[0] &= ~0x01;
3325 bssid[0] |= 0x02;
3326#endif
3327
0795af57
JP		 3328 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3329 dev->name, print_mac(mac, bssid));
f0706e82 3330
8318d78a
JB		 3331 bss = ieee80211_rx_bss_add(dev, bssid,
3332 local->hw.conf.channel->center_freq,
cffdd30d 3333 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3334 if (!bss)
3335 return -ENOMEM;
3336
8318d78a
JB		 3337 bss->band = local->hw.conf.channel->band;
3338 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3339
3340 if (local->hw.conf.beacon_int == 0)
f709fc69 3341 local->hw.conf.beacon_int = 10000;
f0706e82 3342 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3343 bss->last_update = jiffies;
3344 bss->capability = WLAN_CAPABILITY_IBSS;
3345 if (sdata->default_key) {
3346 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3347 } else
3348 sdata->drop_unencrypted = 0;
8318d78a 3349 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3350 pos = bss->supp_rates;
8318d78a
JB		 3351 for (i = 0; i < sband->n_bitrates; i++) {
3352 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3353 *pos++ = (u8) (rate / 5);
3354 }
3355
3356 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3357}
3358
3359
3360static int ieee80211_sta_find_ibss(struct net_device *dev,
3361 struct ieee80211_if_sta *ifsta)
3362{
3363 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3364 struct ieee80211_sta_bss *bss;
3365 int found = 0;
3366 u8 bssid[ETH_ALEN];
3367 int active_ibss;
0795af57
JP		 3368 DECLARE_MAC_BUF(mac);
3369 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3370
3371 if (ifsta->ssid_len == 0)
3372 return -EINVAL;
3373
3374 active_ibss = ieee80211_sta_active_ibss(dev);
3375#ifdef CONFIG_MAC80211_IBSS_DEBUG
3376 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3377 dev->name, active_ibss);
3378#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3379 spin_lock_bh(&local->sta_bss_lock);
3380 list_for_each_entry(bss, &local->sta_bss_list, list) {
3381 if (ifsta->ssid_len != bss->ssid_len ||
3382 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3383 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3384 continue;
3385#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3386 printk(KERN_DEBUG " bssid=%s found\n",
3387 print_mac(mac, bss->bssid));
f0706e82
JB		 3388#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3389 memcpy(bssid, bss->bssid, ETH_ALEN);
3390 found = 1;
3391 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3392 break;
3393 }
3394 spin_unlock_bh(&local->sta_bss_lock);
3395
3396#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3397 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3398 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3399#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3400 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3401 (bss = ieee80211_rx_bss_get(dev, bssid,
3402 local->hw.conf.channel->center_freq,
cffdd30d 3403 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3404 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3405 " based on configured SSID\n",
0795af57 3406 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3407 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3408 }
3409#ifdef CONFIG_MAC80211_IBSS_DEBUG
3410 printk(KERN_DEBUG " did not try to join ibss\n");
3411#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3412
3413 /* Selected IBSS not found in current scan results - try to scan */
3414 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3415 !ieee80211_sta_active_ibss(dev)) {
3416 mod_timer(&ifsta->timer, jiffies +
3417 IEEE80211_IBSS_MERGE_INTERVAL);
3418 } else if (time_after(jiffies, local->last_scan_completed +
3419 IEEE80211_SCAN_INTERVAL)) {
3420 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3421 "join\n", dev->name);
3422 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3423 ifsta->ssid_len);
3424 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3425 int interval = IEEE80211_SCAN_INTERVAL;
3426
3427 if (time_after(jiffies, ifsta->ibss_join_req +
3428 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3429 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3430 (!(local->oper_channel->flags &
3431 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3432 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3433 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3434 printk(KERN_DEBUG "%s: IBSS not allowed on"
3435 " %d MHz\n", dev->name,
3436 local->hw.conf.channel->center_freq);
f0706e82
JB		 3437 }
3438
3439 /* No IBSS found - decrease scan interval and continue
3440 * scanning. */
3441 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3442 }
3443
3444 ifsta->state = IEEE80211_IBSS_SEARCH;
3445 mod_timer(&ifsta->timer, jiffies + interval);
3446 return 0;
3447 }
3448
3449 return 0;
3450}
3451
3452
3453int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3454{
8318d78a 3455 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82
JB		 3456 struct ieee80211_if_sta *ifsta;
3457 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3458
3459 if (len > IEEE80211_MAX_SSID_LEN)
3460 return -EINVAL;
3461
3462 /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
3463 * not defined. */
3464 if (local->ops->conf_tx) {
3465 struct ieee80211_tx_queue_params qparam;
3466 int i;
3467
3468 memset(&qparam, 0, sizeof(qparam));
8318d78a 3469
f0706e82 3470 qparam.aifs = 2;
8318d78a
JB		 3471
3472 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
3473 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
3474 qparam.cw_min = 31;
3475 else
3476 qparam.cw_min = 15;
3477
f0706e82 3478 qparam.cw_max = 1023;
3330d7be 3479 qparam.txop = 0;
8318d78a 3480
f0706e82 3481 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
f0706e82
JB		 3482 local->ops->conf_tx(local_to_hw(local),
3483 i + IEEE80211_TX_QUEUE_DATA0,
3484 &qparam);
8318d78a 3485
f0706e82
JB		 3486 /* IBSS uses different parameters for Beacon sending */
3487 qparam.cw_min++;
3488 qparam.cw_min *= 2;
3489 qparam.cw_min--;
3490 local->ops->conf_tx(local_to_hw(local),
3491 IEEE80211_TX_QUEUE_BEACON, &qparam);
3492 }
3493
f0706e82
JB		 3494 ifsta = &sdata->u.sta;
3495
3496 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3497 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3498 memcpy(ifsta->ssid, ssid, len);
3499 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3500 ifsta->ssid_len = len;
3501
d6f2da5b
JS		 3502 if (len)
3503 ifsta->flags |= IEEE80211_STA_SSID_SET;
3504 else
3505 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3506 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3507 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3508 ifsta->ibss_join_req = jiffies;
3509 ifsta->state = IEEE80211_IBSS_SEARCH;
3510 return ieee80211_sta_find_ibss(dev, ifsta);
3511 }
3512 return 0;
3513}
3514
3515
3516int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3517{
3518 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3519 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3520 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3521 *len = ifsta->ssid_len;
3522 return 0;
3523}
3524
3525
3526int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3527{
3528 struct ieee80211_sub_if_data *sdata;
3529 struct ieee80211_if_sta *ifsta;
3530 int res;
3531
3532 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3533 ifsta = &sdata->u.sta;
3534
3535 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3536 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3537 res = ieee80211_if_config(dev);
3538 if (res) {
3539 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3540 "the low-level driver\n", dev->name);
3541 return res;
3542 }
3543 }
3544
d6f2da5b
JS		 3545 if (is_valid_ether_addr(bssid))
3546 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3547 else
d6f2da5b
JS		 3548 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3549
f0706e82
JB		 3550 return 0;
3551}
3552
3553
3554static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3555 struct ieee80211_sub_if_data *sdata,
3556 int powersave)
3557{
3558 struct sk_buff *skb;
3559 struct ieee80211_hdr *nullfunc;
3560 u16 fc;
3561
3562 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3563 if (!skb) {
3564 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3565 "frame\n", sdata->dev->name);
3566 return;
3567 }
3568 skb_reserve(skb, local->hw.extra_tx_headroom);
3569
3570 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3571 memset(nullfunc, 0, 24);
3572 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3573 IEEE80211_FCTL_TODS;
3574 if (powersave)
3575 fc |= IEEE80211_FCTL_PM;
3576 nullfunc->frame_control = cpu_to_le16(fc);
3577 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3578 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3579 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3580
3581 ieee80211_sta_tx(sdata->dev, skb, 0);
3582}
3583
3584
69d3b6f4
JB		 3585static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3586{
3587 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3588 ieee80211_vif_is_mesh(&sdata->vif))
3589 ieee80211_sta_timer((unsigned long)sdata);
3590}
3591
f0706e82
JB		 3592void ieee80211_scan_completed(struct ieee80211_hw *hw)
3593{
3594 struct ieee80211_local *local = hw_to_local(hw);
3595 struct net_device *dev = local->scan_dev;
3596 struct ieee80211_sub_if_data *sdata;
3597 union iwreq_data wrqu;
3598
3599 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3600 memset(&wrqu, 0, sizeof(wrqu));
3601 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3602
ece8eddd
ZY		 3603 if (local->sta_hw_scanning) {
3604 local->sta_hw_scanning = 0;
69d3b6f4
JB		 3605 /* Restart STA timer for HW scan case */
3606 rcu_read_lock();
3607 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3608 ieee80211_restart_sta_timer(sdata);
3609 rcu_read_unlock();
3610
ece8eddd
ZY		 3611 goto done;
3612 }
3613
3614 local->sta_sw_scanning = 0;
f0706e82 3615 if (ieee80211_hw_config(local))
4b50e388 3616 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3617 "channel after scan\n", dev->name);
3618
4150c572
JB		 3619
3620 netif_tx_lock_bh(local->mdev);
3621 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3622 local->ops->configure_filter(local_to_hw(local),
3623 FIF_BCN_PRBRESP_PROMISC,
3624 &local->filter_flags,
3625 local->mdev->mc_count,
3626 local->mdev->mc_list);
3627
3628 netif_tx_unlock_bh(local->mdev);
f0706e82 3629
79010420
JB		 3630 rcu_read_lock();
3631 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3632
3633 /* No need to wake the master device. */
3634 if (sdata->dev == local->mdev)
3635 continue;
3636
69d3b6f4
JB		 3637 /* Tell AP we're back */
3638 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3639 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3640 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3641
69d3b6f4 3642 ieee80211_restart_sta_timer(sdata);
f709fc69 3643
f0706e82
JB		 3644 netif_wake_queue(sdata->dev);
3645 }
79010420 3646 rcu_read_unlock();
f0706e82 3647
ece8eddd 3648done:
f0706e82 3649 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3650 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3651 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3652 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3653 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3654 !ieee80211_sta_active_ibss(dev)))
3655 ieee80211_sta_find_ibss(dev, ifsta);
3656 }
3657}
3658EXPORT_SYMBOL(ieee80211_scan_completed);
3659
3660void ieee80211_sta_scan_work(struct work_struct *work)
3661{
3662 struct ieee80211_local *local =
3663 container_of(work, struct ieee80211_local, scan_work.work);
3664 struct net_device *dev = local->scan_dev;
3665 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3666 struct ieee80211_supported_band *sband;
f0706e82
JB		 3667 struct ieee80211_channel *chan;
3668 int skip;
3669 unsigned long next_delay = 0;
3670
ece8eddd 3671 if (!local->sta_sw_scanning)
f0706e82
JB		 3672 return;
3673
3674 switch (local->scan_state) {
3675 case SCAN_SET_CHANNEL:
69d464d5
JB		 3676 /*
3677 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3678 * after we successfully scanned the last channel of the last
3679 * band (and the last band is supported by the hw)
3680 */
8318d78a
JB		 3681 if (local->scan_band < IEEE80211_NUM_BANDS)
3682 sband = local->hw.wiphy->bands[local->scan_band];
3683 else
3684 sband = NULL;
3685
69d464d5
JB		 3686 /*
3687 * If we are at an unsupported band and have more bands
3688 * left to scan, advance to the next supported one.
3689 */
3690 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3691 local->scan_band++;
3692 sband = local->hw.wiphy->bands[local->scan_band];
3693 local->scan_channel_idx = 0;
3694 }
3695
69d464d5
JB		 3696 /* if no more bands/channels left, complete scan */
3697 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3698 ieee80211_scan_completed(local_to_hw(local));
3699 return;
3700 }
8318d78a
JB		 3701 skip = 0;
3702 chan = &sband->channels[local->scan_channel_idx];
3703
3704 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3705 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3706 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3707 skip = 1;
3708
3709 if (!skip) {
f0706e82
JB		 3710 local->scan_channel = chan;
3711 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3712 printk(KERN_DEBUG "%s: failed to set freq to "
3713 "%d MHz for scan\n", dev->name,
3714 chan->center_freq);
f0706e82
JB		 3715 skip = 1;
3716 }
3717 }
3718
69d464d5 3719 /* advance state machine to next channel/band */
f0706e82 3720 local->scan_channel_idx++;
8318d78a 3721 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3722 /*
3723 * scan_band may end up == IEEE80211_NUM_BANDS, but
3724 * we'll catch that case above and complete the scan
3725 * if that is the case.
3726 */
8318d78a
JB		 3727 local->scan_band++;
3728 local->scan_channel_idx = 0;
f0706e82
JB		 3729 }
3730
3731 if (skip)
3732 break;
3733
3734 next_delay = IEEE80211_PROBE_DELAY +
3735 usecs_to_jiffies(local->hw.channel_change_time);
3736 local->scan_state = SCAN_SEND_PROBE;
3737 break;
3738 case SCAN_SEND_PROBE:
8318d78a 3739 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3740 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3741
3742 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3743 break;
3744 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3745 local->scan_ssid_len);
3746 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3747 break;
3748 }
3749
ece8eddd 3750 if (local->sta_sw_scanning)
f0706e82
JB		 3751 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3752 next_delay);
3753}
3754
3755
3756static int ieee80211_sta_start_scan(struct net_device *dev,
3757 u8 *ssid, size_t ssid_len)
3758{
3759 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3760 struct ieee80211_sub_if_data *sdata;
3761
3762 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3763 return -EINVAL;
3764
3765 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3766 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3767 * BSSID: MACAddress
3768 * SSID
3769 * ScanType: ACTIVE, PASSIVE
3770 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3771 * a Probe frame during active scanning
3772 * ChannelList
3773 * MinChannelTime (>= ProbeDelay), in TU
3774 * MaxChannelTime: (>= MinChannelTime), in TU
3775 */
3776
3777 /* MLME-SCAN.confirm
3778 * BSSDescriptionSet
3779 * ResultCode: SUCCESS, INVALID_PARAMETERS
3780 */
3781
ece8eddd 3782 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3783 if (local->scan_dev == dev)
3784 return 0;
3785 return -EBUSY;
3786 }
3787
3788 if (local->ops->hw_scan) {
3789 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3790 ssid, ssid_len);
f0706e82 3791 if (!rc) {
ece8eddd 3792 local->sta_hw_scanning = 1;
f0706e82
JB		 3793 local->scan_dev = dev;
3794 }
3795 return rc;
3796 }
3797
ece8eddd 3798 local->sta_sw_scanning = 1;
f0706e82 3799
79010420
JB		 3800 rcu_read_lock();
3801 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3802
3803 /* Don't stop the master interface, otherwise we can't transmit
3804 * probes! */
3805 if (sdata->dev == local->mdev)
3806 continue;
3807
f0706e82 3808 netif_stop_queue(sdata->dev);
51fb61e7 3809 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3810 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3811 ieee80211_send_nullfunc(local, sdata, 1);
3812 }
79010420 3813 rcu_read_unlock();
f0706e82
JB		 3814
3815 if (ssid) {
3816 local->scan_ssid_len = ssid_len;
3817 memcpy(local->scan_ssid, ssid, ssid_len);
3818 } else
3819 local->scan_ssid_len = 0;
3820 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3821 local->scan_channel_idx = 0;
8318d78a 3822 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 3823 local->scan_dev = dev;
3824
4150c572
JB		 3825 netif_tx_lock_bh(local->mdev);
3826 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3827 local->ops->configure_filter(local_to_hw(local),
3828 FIF_BCN_PRBRESP_PROMISC,
3829 &local->filter_flags,
3830 local->mdev->mc_count,
3831 local->mdev->mc_list);
3832 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3833
3834 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3835 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3836 IEEE80211_CHANNEL_TIME);
3837
3838 return 0;
3839}
3840
3841
3842int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3843{
3844 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3845 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3846 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3847
51fb61e7 3848 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3849 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3850
ece8eddd 3851 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3852 if (local->scan_dev == dev)
3853 return 0;
3854 return -EBUSY;
3855 }
3856
a0af5f14
HS		 3857 ifsta->scan_ssid_len = ssid_len;
3858 if (ssid_len)
3859 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3860 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3861 queue_work(local->hw.workqueue, &ifsta->work);
3862 return 0;
3863}
3864
3865static char *
3866ieee80211_sta_scan_result(struct net_device *dev,
3867 struct ieee80211_sta_bss *bss,
3868 char *current_ev, char *end_buf)
3869{
3870 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3871 struct iw_event iwe;
3872
3873 if (time_after(jiffies,
3874 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3875 return current_ev;
3876
f0706e82
JB		 3877 memset(&iwe, 0, sizeof(iwe));
3878 iwe.cmd = SIOCGIWAP;
3879 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3880 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3881 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3882 IW_EV_ADDR_LEN);
3883
3884 memset(&iwe, 0, sizeof(iwe));
3885 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 3886 if (bss_mesh_cfg(bss)) {
3887 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69
LCC		 3888 iwe.u.data.flags = 1;
3889 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
902acc78 3890 bss_mesh_id(bss));
f709fc69
LCC		 3891 } else {
3892 iwe.u.data.length = bss->ssid_len;
3893 iwe.u.data.flags = 1;
3894 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3895 bss->ssid);
3896 }
f0706e82 3897
1d1b5359
LCC		 3898 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3899 || bss_mesh_cfg(bss)) {
f0706e82
JB		 3900 memset(&iwe, 0, sizeof(iwe));
3901 iwe.cmd = SIOCGIWMODE;
902acc78 3902 if (bss_mesh_cfg(bss))
f709fc69
LCC		 3903 iwe.u.mode = IW_MODE_MESH;
3904 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 3905 iwe.u.mode = IW_MODE_MASTER;
3906 else
3907 iwe.u.mode = IW_MODE_ADHOC;
3908 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3909 IW_EV_UINT_LEN);
3910 }
3911
3912 memset(&iwe, 0, sizeof(iwe));
3913 iwe.cmd = SIOCGIWFREQ;
8318d78a
JB		 3914 iwe.u.freq.m = bss->freq;
3915 iwe.u.freq.e = 6;
f0706e82
JB		 3916 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3917 IW_EV_FREQ_LEN);
8318d78a
JB		 3918
3919 memset(&iwe, 0, sizeof(iwe));
3920 iwe.cmd = SIOCGIWFREQ;
3921 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3922 iwe.u.freq.e = 0;
f0706e82
JB		 3923 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3924 IW_EV_FREQ_LEN);
3925
3926 memset(&iwe, 0, sizeof(iwe));
3927 iwe.cmd = IWEVQUAL;
3928 iwe.u.qual.qual = bss->signal;
3929 iwe.u.qual.level = bss->rssi;
3930 iwe.u.qual.noise = bss->noise;
3931 iwe.u.qual.updated = local->wstats_flags;
3932 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3933 IW_EV_QUAL_LEN);
3934
3935 memset(&iwe, 0, sizeof(iwe));
3936 iwe.cmd = SIOCGIWENCODE;
3937 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3938 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
3939 else
3940 iwe.u.data.flags = IW_ENCODE_DISABLED;
3941 iwe.u.data.length = 0;
3942 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
3943
3944 if (bss && bss->wpa_ie) {
3945 memset(&iwe, 0, sizeof(iwe));
3946 iwe.cmd = IWEVGENIE;
3947 iwe.u.data.length = bss->wpa_ie_len;
3948 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3949 bss->wpa_ie);
3950 }
3951
3952 if (bss && bss->rsn_ie) {
3953 memset(&iwe, 0, sizeof(iwe));
3954 iwe.cmd = IWEVGENIE;
3955 iwe.u.data.length = bss->rsn_ie_len;
3956 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3957 bss->rsn_ie);
3958 }
3959
3960 if (bss && bss->supp_rates_len > 0) {
3961 /* display all supported rates in readable format */
3962 char *p = current_ev + IW_EV_LCP_LEN;
3963 int i;
3964
3965 memset(&iwe, 0, sizeof(iwe));
3966 iwe.cmd = SIOCGIWRATE;
3967 /* Those two flags are ignored... */
3968 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
3969
3970 for (i = 0; i < bss->supp_rates_len; i++) {
3971 iwe.u.bitrate.value = ((bss->supp_rates[i] &
3972 0x7f) * 500000);
3973 p = iwe_stream_add_value(current_ev, p,
3974 end_buf, &iwe, IW_EV_PARAM_LEN);
3975 }
3976 current_ev = p;
3977 }
3978
3979 if (bss) {
3980 char *buf;
3981 buf = kmalloc(30, GFP_ATOMIC);
3982 if (buf) {
3983 memset(&iwe, 0, sizeof(iwe));
3984 iwe.cmd = IWEVCUSTOM;
3985 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
3986 iwe.u.data.length = strlen(buf);
3987 current_ev = iwe_stream_add_point(current_ev, end_buf,
3988 &iwe, buf);
3989 kfree(buf);
3990 }
3991 }
3992
902acc78 3993 if (bss_mesh_cfg(bss)) {
f709fc69 3994 char *buf;
902acc78 3995 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 3996 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 3997 if (buf) {
3998 memset(&iwe, 0, sizeof(iwe));
3999 iwe.cmd = IWEVCUSTOM;
4f5d4c4d
LCC		 4000 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4001 iwe.u.data.length = strlen(buf);
4002 current_ev = iwe_stream_add_point(current_ev, end_buf,
4003 &iwe, buf);
4004 sprintf(buf, "Path Selection Protocol ID: "
4005 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4006 cfg[4]);
4007 iwe.u.data.length = strlen(buf);
4008 current_ev = iwe_stream_add_point(current_ev, end_buf,
4009 &iwe, buf);
4010 sprintf(buf, "Path Selection Metric ID: "
4011 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4012 cfg[8]);
4013 iwe.u.data.length = strlen(buf);
4014 current_ev = iwe_stream_add_point(current_ev, end_buf,
4015 &iwe, buf);
4016 sprintf(buf, "Congestion Control Mode ID: "
4017 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4018 cfg[11], cfg[12]);
4019 iwe.u.data.length = strlen(buf);
4020 current_ev = iwe_stream_add_point(current_ev, end_buf,
4021 &iwe, buf);
4022 sprintf(buf, "Channel Precedence: "
4023 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4024 cfg[15], cfg[16]);
f709fc69
LCC		 4025 iwe.u.data.length = strlen(buf);
4026 current_ev = iwe_stream_add_point(current_ev, end_buf,
4027 &iwe, buf);
4028 kfree(buf);
4029 }
4030 }
4031
f0706e82
JB		 4032 return current_ev;
4033}
4034
4035
4036int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4037{
4038 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4039 char *current_ev = buf;
4040 char *end_buf = buf + len;
4041 struct ieee80211_sta_bss *bss;
4042
4043 spin_lock_bh(&local->sta_bss_lock);
4044 list_for_each_entry(bss, &local->sta_bss_list, list) {
4045 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4046 spin_unlock_bh(&local->sta_bss_lock);
4047 return -E2BIG;
4048 }
4049 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4050 end_buf);
4051 }
4052 spin_unlock_bh(&local->sta_bss_lock);
4053 return current_ev - buf;
4054}
4055
4056
4057int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4058{
4059 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4060 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4061 kfree(ifsta->extra_ie);
4062 if (len == 0) {
4063 ifsta->extra_ie = NULL;
4064 ifsta->extra_ie_len = 0;
4065 return 0;
4066 }
4067 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4068 if (!ifsta->extra_ie) {
4069 ifsta->extra_ie_len = 0;
4070 return -ENOMEM;
4071 }
4072 memcpy(ifsta->extra_ie, ie, len);
4073 ifsta->extra_ie_len = len;
4074 return 0;
4075}
4076
4077
4078struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4079 struct sk_buff *skb, u8 *bssid,
4080 u8 *addr)
4081{
4082 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4083 struct sta_info *sta;
91fa558b 4084 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 4085 DECLARE_MAC_BUF(mac);
f0706e82
JB		 4086
4087 /* TODO: Could consider removing the least recently used entry and
4088 * allow new one to be added. */
4089 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4090 if (net_ratelimit()) {
4091 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 4092 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 4093 }
4094 return NULL;
4095 }
4096
0795af57 4097 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 4098 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82 4099
73651ee6
JB		 4100 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4101 if (!sta)
f0706e82
JB		 4102 return NULL;
4103
238814fd
JB		 4104 sta->flags |= WLAN_STA_AUTHORIZED;
4105
8318d78a
JB		 4106 sta->supp_rates[local->hw.conf.channel->band] =
4107 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
f0706e82
JB		 4108
4109 rate_control_rate_init(sta, local);
4110
73651ee6
JB		 4111 if (sta_info_insert(sta)) {
4112 sta_info_destroy(sta);
4113 return NULL;
4114 }
4115
d0709a65 4116 return sta;
f0706e82
JB		 4117}
4118
4119
4120int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4121{
4122 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4123 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4124
4125 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4126 dev->name, reason);
4127
51fb61e7
JB		 4128 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4129 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4130 return -EINVAL;
4131
4132 ieee80211_send_deauth(dev, ifsta, reason);
4133 ieee80211_set_disassoc(dev, ifsta, 1);
4134 return 0;
4135}
4136
4137
4138int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4139{
4140 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4141 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4142
4143 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4144 dev->name, reason);
4145
51fb61e7 4146 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4147 return -EINVAL;
4148
d6f2da5b 4149 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4150 return -1;
4151
4152 ieee80211_send_disassoc(dev, ifsta, reason);
4153 ieee80211_set_disassoc(dev, ifsta, 0);
4154 return 0;
4155}
Linux 6.x block layer and io_uring tree(s)