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mac80211: fix spinlock recursion on sta expiration
[mirror_ubuntu-bionic-kernel.git] / net / mac80211 / ieee80211_sta.c
CommitLineData
f0706e82
JB		 1/*
2 * BSS client mode implementation
3 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14/* TODO:
f0706e82
JB		 15 * order BSS list by RSSI(?) ("quality of AP")
16 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,
17 * SSID)
18 */
5b323edb 19#include <linux/delay.h>
f0706e82
JB		 20#include <linux/if_ether.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/wireless.h>
25#include <linux/random.h>
26#include <linux/etherdevice.h>
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
e2839d8f
VK		 223
224static void ieee80211_sta_def_wmm_params(struct net_device *dev,
225 struct ieee80211_sta_bss *bss,
226 int ibss)
227{
228 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
229 struct ieee80211_local *local = sdata->local;
230 int i, have_higher_than_11mbit = 0;
231
232
233 /* cf. IEEE 802.11 9.2.12 */
234 for (i = 0; i < bss->supp_rates_len; i++)
235 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
236 have_higher_than_11mbit = 1;
237
238 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
239 have_higher_than_11mbit)
240 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
241 else
242 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
243
244
245 if (local->ops->conf_tx) {
246 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 247
248 memset(&qparam, 0, sizeof(qparam));
249
250 qparam.aifs = 2;
251
252 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
253 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
254 qparam.cw_min = 31;
255 else
256 qparam.cw_min = 15;
257
258 qparam.cw_max = 1023;
259 qparam.txop = 0;
260
261 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
262 local->ops->conf_tx(local_to_hw(local),
263 i + IEEE80211_TX_QUEUE_DATA0,
264 &qparam);
265
266 if (ibss) {
267 /* IBSS uses different parameters for Beacon sending */
268 qparam.cw_min++;
269 qparam.cw_min *= 2;
270 qparam.cw_min--;
271 local->ops->conf_tx(local_to_hw(local),
272 IEEE80211_TX_QUEUE_BEACON, &qparam);
273 }
274 }
275}
276
f0706e82
JB		 277static void ieee80211_sta_wmm_params(struct net_device *dev,
278 struct ieee80211_if_sta *ifsta,
279 u8 *wmm_param, size_t wmm_param_len)
280{
281 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
282 struct ieee80211_tx_queue_params params;
283 size_t left;
284 int count;
285 u8 *pos;
286
287 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
288 return;
289 count = wmm_param[6] & 0x0f;
290 if (count == ifsta->wmm_last_param_set)
291 return;
292 ifsta->wmm_last_param_set = count;
293
294 pos = wmm_param + 8;
295 left = wmm_param_len - 8;
296
297 memset(&params, 0, sizeof(params));
298
299 if (!local->ops->conf_tx)
300 return;
301
302 local->wmm_acm = 0;
303 for (; left >= 4; left -= 4, pos += 4) {
304 int aci = (pos[0] >> 5) & 0x03;
305 int acm = (pos[0] >> 4) & 0x01;
306 int queue;
307
308 switch (aci) {
309 case 1:
310 queue = IEEE80211_TX_QUEUE_DATA3;
311 if (acm) {
312 local->wmm_acm |= BIT(0) | BIT(3);
313 }
314 break;
315 case 2:
316 queue = IEEE80211_TX_QUEUE_DATA1;
317 if (acm) {
318 local->wmm_acm |= BIT(4) | BIT(5);
319 }
320 break;
321 case 3:
322 queue = IEEE80211_TX_QUEUE_DATA0;
323 if (acm) {
324 local->wmm_acm |= BIT(6) | BIT(7);
325 }
326 break;
327 case 0:
328 default:
329 queue = IEEE80211_TX_QUEUE_DATA2;
330 if (acm) {
331 local->wmm_acm |= BIT(1) | BIT(2);
332 }
333 break;
334 }
335
336 params.aifs = pos[0] & 0x0f;
337 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
338 params.cw_min = ecw2cw(pos[1] & 0x0f);
3330d7be
JB		 339 params.txop = pos[2] | (pos[3] << 8);
340#ifdef CONFIG_MAC80211_DEBUG
f0706e82 341 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 342 "cWmin=%d cWmax=%d txop=%d\n",
f0706e82 343 dev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 344 params.cw_max, params.txop);
345#endif
f0706e82
JB		 346 /* TODO: handle ACM (block TX, fallback to next lowest allowed
347 * AC for now) */
348 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
349 printk(KERN_DEBUG "%s: failed to set TX queue "
350 "parameters for queue %d\n", dev->name, queue);
351 }
352 }
353}
354
355
471b3efd
JB		 356static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
357 u8 erp_value)
5628221c 358{
471b3efd 359 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
5628221c 360 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
471b3efd
JB		 361 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
362 bool preamble_mode = (erp_value & WLAN_ERP_BARKER_PREAMBLE) != 0;
0795af57 363 DECLARE_MAC_BUF(mac);
471b3efd 364 u32 changed = 0;
5628221c 365
471b3efd 366 if (use_protection != bss_conf->use_cts_prot) {
5628221c
DD		 367 if (net_ratelimit()) {
368 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 369 "%s)\n",
471b3efd 370 sdata->dev->name,
5628221c 371 use_protection ? "enabled" : "disabled",
0795af57 372 print_mac(mac, ifsta->bssid));
5628221c 373 }
471b3efd
JB		 374 bss_conf->use_cts_prot = use_protection;
375 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 376 }
7e9ed188 377
471b3efd 378 if (preamble_mode != bss_conf->use_short_preamble) {
7e9ed188
DD		 379 if (net_ratelimit()) {
380 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 381 " (BSSID=%s)\n",
471b3efd 382 sdata->dev->name,
7e9ed188
DD		 383 (preamble_mode == WLAN_ERP_PREAMBLE_SHORT) ?
384 "short" : "long",
0795af57 385 print_mac(mac, ifsta->bssid));
7e9ed188 386 }
471b3efd
JB		 387 bss_conf->use_short_preamble = preamble_mode;
388 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 389 }
d9430a32 390
471b3efd 391 return changed;
5628221c
DD		 392}
393
c7153508
RR		 394int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
395 struct ieee80211_ht_info *ht_info)
396{
397
398 if (ht_info == NULL)
399 return -EINVAL;
400
401 memset(ht_info, 0, sizeof(*ht_info));
402
403 if (ht_cap_ie) {
404 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
405
406 ht_info->ht_supported = 1;
407 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
408 ht_info->ampdu_factor =
409 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
410 ht_info->ampdu_density =
411 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
412 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
413 } else
414 ht_info->ht_supported = 0;
415
416 return 0;
417}
418
419int ieee80211_ht_addt_info_ie_to_ht_bss_info(
420 struct ieee80211_ht_addt_info *ht_add_info_ie,
421 struct ieee80211_ht_bss_info *bss_info)
422{
423 if (bss_info == NULL)
424 return -EINVAL;
425
426 memset(bss_info, 0, sizeof(*bss_info));
427
428 if (ht_add_info_ie) {
429 u16 op_mode;
430 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
431
432 bss_info->primary_channel = ht_add_info_ie->control_chan;
433 bss_info->bss_cap = ht_add_info_ie->ht_param;
434 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
435 }
436
437 return 0;
438}
5628221c 439
f0706e82
JB		 440static void ieee80211_sta_send_associnfo(struct net_device *dev,
441 struct ieee80211_if_sta *ifsta)
442{
443 char *buf;
444 size_t len;
445 int i;
446 union iwreq_data wrqu;
447
448 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
449 return;
450
451 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 452 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 453 if (!buf)
454 return;
455
456 len = sprintf(buf, "ASSOCINFO(");
457 if (ifsta->assocreq_ies) {
458 len += sprintf(buf + len, "ReqIEs=");
459 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
460 len += sprintf(buf + len, "%02x",
461 ifsta->assocreq_ies[i]);
462 }
463 }
464 if (ifsta->assocresp_ies) {
465 if (ifsta->assocreq_ies)
466 len += sprintf(buf + len, " ");
467 len += sprintf(buf + len, "RespIEs=");
468 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
469 len += sprintf(buf + len, "%02x",
470 ifsta->assocresp_ies[i]);
471 }
472 }
473 len += sprintf(buf + len, ")");
474
475 if (len > IW_CUSTOM_MAX) {
476 len = sprintf(buf, "ASSOCRESPIE=");
477 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
478 len += sprintf(buf + len, "%02x",
479 ifsta->assocresp_ies[i]);
480 }
481 }
482
483 memset(&wrqu, 0, sizeof(wrqu));
484 wrqu.data.length = len;
485 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
486
487 kfree(buf);
488}
489
490
491static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 492 struct ieee80211_if_sta *ifsta,
47f0c502 493 bool assoc)
f0706e82 494{
471b3efd
JB		 495 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
496 struct ieee80211_local *local = sdata->local;
f0706e82 497 union iwreq_data wrqu;
471b3efd 498 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 499
f0706e82 500 if (assoc) {
5628221c 501 struct ieee80211_sta_bss *bss;
d6f2da5b
JS		 502
503 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
504
51fb61e7 505 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82 506 return;
5628221c 507
65c107ab 508 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 509 local->hw.conf.channel->center_freq,
cffdd30d 510 ifsta->ssid, ifsta->ssid_len);
5628221c
DD		 511 if (bss) {
512 if (bss->has_erp_value)
471b3efd
JB		 513 changed |= ieee80211_handle_erp_ie(
514 sdata, bss->erp_value);
5628221c
DD		 515 ieee80211_rx_bss_put(dev, bss);
516 }
517
f0706e82 518 netif_carrier_on(dev);
d6f2da5b 519 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 520 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
521 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
522 ieee80211_sta_send_associnfo(dev, ifsta);
523 } else {
85249e5f 524 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
d6f2da5b 525 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
f0706e82 526 netif_carrier_off(dev);
d9430a32 527 ieee80211_reset_erp_info(dev);
f0706e82
JB		 528 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
529 }
530 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
531 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
532 ifsta->last_probe = jiffies;
47f0c502 533 ieee80211_led_assoc(local, assoc);
471b3efd 534
b2205256 535 sdata->bss_conf.assoc = assoc;
471b3efd 536 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 537}
538
539static void ieee80211_set_disassoc(struct net_device *dev,
540 struct ieee80211_if_sta *ifsta, int deauth)
541{
542 if (deauth)
543 ifsta->auth_tries = 0;
544 ifsta->assoc_tries = 0;
545 ieee80211_set_associated(dev, ifsta, 0);
546}
547
ee385855
LCC		 548void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
549 int encrypt)
f0706e82
JB		 550{
551 struct ieee80211_sub_if_data *sdata;
552 struct ieee80211_tx_packet_data *pkt_data;
553
554 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
555 skb->dev = sdata->local->mdev;
556 skb_set_mac_header(skb, 0);
557 skb_set_network_header(skb, 0);
558 skb_set_transport_header(skb, 0);
559
560 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
561 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
562 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 563 if (!encrypt)
564 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 565
566 dev_queue_xmit(skb);
567}
568
569
570static void ieee80211_send_auth(struct net_device *dev,
571 struct ieee80211_if_sta *ifsta,
572 int transaction, u8 *extra, size_t extra_len,
573 int encrypt)
574{
575 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
576 struct sk_buff *skb;
577 struct ieee80211_mgmt *mgmt;
578
579 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
580 sizeof(*mgmt) + 6 + extra_len);
581 if (!skb) {
582 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
583 "frame\n", dev->name);
584 return;
585 }
586 skb_reserve(skb, local->hw.extra_tx_headroom);
587
588 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
589 memset(mgmt, 0, 24 + 6);
590 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
591 IEEE80211_STYPE_AUTH);
592 if (encrypt)
593 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
594 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
595 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
596 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
597 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
598 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
599 ifsta->auth_transaction = transaction + 1;
600 mgmt->u.auth.status_code = cpu_to_le16(0);
601 if (extra)
602 memcpy(skb_put(skb, extra_len), extra, extra_len);
603
604 ieee80211_sta_tx(dev, skb, encrypt);
605}
606
607
608static void ieee80211_authenticate(struct net_device *dev,
609 struct ieee80211_if_sta *ifsta)
610{
0795af57
JP		 611 DECLARE_MAC_BUF(mac);
612
f0706e82
JB		 613 ifsta->auth_tries++;
614 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 615 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 616 " timed out\n",
0795af57 617 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 618 ifsta->state = IEEE80211_DISABLED;
619 return;
620 }
621
622 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 623 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
624 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 625
626 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
627
628 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
629}
630
631
632static void ieee80211_send_assoc(struct net_device *dev,
633 struct ieee80211_if_sta *ifsta)
634{
635 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 636 struct sk_buff *skb;
637 struct ieee80211_mgmt *mgmt;
638 u8 *pos, *ies;
639 int i, len;
640 u16 capab;
641 struct ieee80211_sta_bss *bss;
642 int wmm = 0;
8318d78a 643 struct ieee80211_supported_band *sband;
f0706e82
JB		 644
645 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
646 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
647 ifsta->ssid_len);
648 if (!skb) {
649 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
650 "frame\n", dev->name);
651 return;
652 }
653 skb_reserve(skb, local->hw.extra_tx_headroom);
654
8318d78a
JB		 655 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
656
f0706e82 657 capab = ifsta->capab;
8318d78a
JB		 658
659 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
660 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
661 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
662 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
663 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 664 }
8318d78a
JB		 665
666 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
667 local->hw.conf.channel->center_freq,
cffdd30d 668 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 669 if (bss) {
670 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
671 capab |= WLAN_CAPABILITY_PRIVACY;
672 if (bss->wmm_ie) {
673 wmm = 1;
674 }
675 ieee80211_rx_bss_put(dev, bss);
676 }
677
678 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
679 memset(mgmt, 0, 24);
680 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
681 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
682 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
683
d6f2da5b 684 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 685 skb_put(skb, 10);
686 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
687 IEEE80211_STYPE_REASSOC_REQ);
688 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
689 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
690 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
691 ETH_ALEN);
692 } else {
693 skb_put(skb, 4);
694 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
695 IEEE80211_STYPE_ASSOC_REQ);
696 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
697 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
698 }
699
700 /* SSID */
701 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
702 *pos++ = WLAN_EID_SSID;
703 *pos++ = ifsta->ssid_len;
704 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
705
8318d78a 706 len = sband->n_bitrates;
f0706e82
JB		 707 if (len > 8)
708 len = 8;
709 pos = skb_put(skb, len + 2);
710 *pos++ = WLAN_EID_SUPP_RATES;
711 *pos++ = len;
712 for (i = 0; i < len; i++) {
8318d78a 713 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 714 *pos++ = (u8) (rate / 5);
715 }
716
8318d78a
JB		 717 if (sband->n_bitrates > len) {
718 pos = skb_put(skb, sband->n_bitrates - len + 2);
f0706e82 719 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8318d78a
JB		 720 *pos++ = sband->n_bitrates - len;
721 for (i = len; i < sband->n_bitrates; i++) {
722 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 723 *pos++ = (u8) (rate / 5);
724 }
725 }
726
727 if (ifsta->extra_ie) {
728 pos = skb_put(skb, ifsta->extra_ie_len);
729 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
730 }
731
d6f2da5b 732 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 733 pos = skb_put(skb, 9);
734 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
735 *pos++ = 7; /* len */
736 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
737 *pos++ = 0x50;
738 *pos++ = 0xf2;
739 *pos++ = 2; /* WME */
740 *pos++ = 0; /* WME info */
741 *pos++ = 1; /* WME ver */
742 *pos++ = 0;
743 }
c7153508 744 /* wmm support is a must to HT */
8318d78a
JB		 745 if (wmm && sband->ht_info.ht_supported) {
746 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
c7153508
RR		 747 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
748 *pos++ = WLAN_EID_HT_CAPABILITY;
749 *pos++ = sizeof(struct ieee80211_ht_cap);
750 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
751 memcpy(pos, &tmp, sizeof(u16));
752 pos += sizeof(u16);
8318d78a
JB		 753 /* TODO: needs a define here for << 2 */
754 *pos++ = sband->ht_info.ampdu_factor |
755 (sband->ht_info.ampdu_density << 2);
756 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 757 }
f0706e82
JB		 758
759 kfree(ifsta->assocreq_ies);
760 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 761 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 762 if (ifsta->assocreq_ies)
763 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
764
765 ieee80211_sta_tx(dev, skb, 0);
766}
767
768
769static void ieee80211_send_deauth(struct net_device *dev,
770 struct ieee80211_if_sta *ifsta, u16 reason)
771{
772 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
773 struct sk_buff *skb;
774 struct ieee80211_mgmt *mgmt;
775
776 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
777 if (!skb) {
778 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
779 "frame\n", dev->name);
780 return;
781 }
782 skb_reserve(skb, local->hw.extra_tx_headroom);
783
784 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
785 memset(mgmt, 0, 24);
786 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
787 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
788 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
789 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
790 IEEE80211_STYPE_DEAUTH);
791 skb_put(skb, 2);
792 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
793
794 ieee80211_sta_tx(dev, skb, 0);
795}
796
797
798static void ieee80211_send_disassoc(struct net_device *dev,
799 struct ieee80211_if_sta *ifsta, u16 reason)
800{
801 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
802 struct sk_buff *skb;
803 struct ieee80211_mgmt *mgmt;
804
805 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
806 if (!skb) {
807 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
808 "frame\n", dev->name);
809 return;
810 }
811 skb_reserve(skb, local->hw.extra_tx_headroom);
812
813 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
814 memset(mgmt, 0, 24);
815 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
816 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
817 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
818 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
819 IEEE80211_STYPE_DISASSOC);
820 skb_put(skb, 2);
821 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
822
823 ieee80211_sta_tx(dev, skb, 0);
824}
825
826
827static int ieee80211_privacy_mismatch(struct net_device *dev,
828 struct ieee80211_if_sta *ifsta)
829{
65c107ab 830 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 831 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 832 int bss_privacy;
833 int wep_privacy;
834 int privacy_invoked;
f0706e82 835
5b98b1f7 836 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 837 return 0;
838
8318d78a
JB		 839 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
840 local->hw.conf.channel->center_freq,
cffdd30d 841 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 842 if (!bss)
843 return 0;
844
5b98b1f7
JB		 845 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
846 wep_privacy = !!ieee80211_sta_wep_configured(dev);
847 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 848
849 ieee80211_rx_bss_put(dev, bss);
850
5b98b1f7
JB		 851 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
852 return 0;
853
854 return 1;
f0706e82
JB		 855}
856
857
858static void ieee80211_associate(struct net_device *dev,
859 struct ieee80211_if_sta *ifsta)
860{
0795af57
JP		 861 DECLARE_MAC_BUF(mac);
862
f0706e82
JB		 863 ifsta->assoc_tries++;
864 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 865 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 866 " timed out\n",
0795af57 867 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 868 ifsta->state = IEEE80211_DISABLED;
869 return;
870 }
871
872 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 873 printk(KERN_DEBUG "%s: associate with AP %s\n",
874 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 875 if (ieee80211_privacy_mismatch(dev, ifsta)) {
876 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
877 "mixed-cell disabled - abort association\n", dev->name);
878 ifsta->state = IEEE80211_DISABLED;
879 return;
880 }
881
882 ieee80211_send_assoc(dev, ifsta);
883
884 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
885}
886
887
888static void ieee80211_associated(struct net_device *dev,
889 struct ieee80211_if_sta *ifsta)
890{
891 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
892 struct sta_info *sta;
893 int disassoc;
0795af57 894 DECLARE_MAC_BUF(mac);
f0706e82
JB		 895
896 /* TODO: start monitoring current AP signal quality and number of
897 * missed beacons. Scan other channels every now and then and search
898 * for better APs. */
899 /* TODO: remove expired BSSes */
900
901 ifsta->state = IEEE80211_ASSOCIATED;
902
d0709a65
JB		 903 rcu_read_lock();
904
f0706e82
JB		 905 sta = sta_info_get(local, ifsta->bssid);
906 if (!sta) {
0795af57
JP		 907 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
908 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 909 disassoc = 1;
910 } else {
911 disassoc = 0;
912 if (time_after(jiffies,
913 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 914 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 915 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 916 "current AP %s - assume out of "
f0706e82 917 "range\n",
0795af57 918 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 919 disassoc = 1;
d0709a65 920 sta_info_unlink(&sta);
d6f2da5b 921 } else
f0706e82
JB		 922 ieee80211_send_probe_req(dev, ifsta->bssid,
923 local->scan_ssid,
924 local->scan_ssid_len);
d6f2da5b 925 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 926 } else {
d6f2da5b 927 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 928 if (time_after(jiffies, ifsta->last_probe +
929 IEEE80211_PROBE_INTERVAL)) {
930 ifsta->last_probe = jiffies;
931 ieee80211_send_probe_req(dev, ifsta->bssid,
932 ifsta->ssid,
933 ifsta->ssid_len);
934 }
935 }
f0706e82 936 }
d0709a65
JB		 937
938 rcu_read_unlock();
939
940 if (disassoc && sta) {
d0709a65
JB		 941 rtnl_lock();
942 sta_info_destroy(sta);
943 rtnl_unlock();
944 }
945
f0706e82 946 if (disassoc) {
2d192d95
MW		 947 ifsta->state = IEEE80211_DISABLED;
948 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 949 } else {
950 mod_timer(&ifsta->timer, jiffies +
951 IEEE80211_MONITORING_INTERVAL);
952 }
953}
954
955
956static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
957 u8 *ssid, size_t ssid_len)
958{
959 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 960 struct ieee80211_supported_band *sband;
f0706e82
JB		 961 struct sk_buff *skb;
962 struct ieee80211_mgmt *mgmt;
963 u8 *pos, *supp_rates, *esupp_rates = NULL;
964 int i;
965
966 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
967 if (!skb) {
968 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
969 "request\n", dev->name);
970 return;
971 }
972 skb_reserve(skb, local->hw.extra_tx_headroom);
973
974 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
975 memset(mgmt, 0, 24);
976 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
977 IEEE80211_STYPE_PROBE_REQ);
978 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
979 if (dst) {
980 memcpy(mgmt->da, dst, ETH_ALEN);
981 memcpy(mgmt->bssid, dst, ETH_ALEN);
982 } else {
983 memset(mgmt->da, 0xff, ETH_ALEN);
984 memset(mgmt->bssid, 0xff, ETH_ALEN);
985 }
986 pos = skb_put(skb, 2 + ssid_len);
987 *pos++ = WLAN_EID_SSID;
988 *pos++ = ssid_len;
989 memcpy(pos, ssid, ssid_len);
990
991 supp_rates = skb_put(skb, 2);
992 supp_rates[0] = WLAN_EID_SUPP_RATES;
993 supp_rates[1] = 0;
8318d78a
JB		 994 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
995
996 for (i = 0; i < sband->n_bitrates; i++) {
997 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 998 if (esupp_rates) {
999 pos = skb_put(skb, 1);
1000 esupp_rates[1]++;
1001 } else if (supp_rates[1] == 8) {
1002 esupp_rates = skb_put(skb, 3);
1003 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1004 esupp_rates[1] = 1;
1005 pos = &esupp_rates[2];
1006 } else {
1007 pos = skb_put(skb, 1);
1008 supp_rates[1]++;
1009 }
8318d78a 1010 *pos = rate->bitrate / 5;
f0706e82
JB		 1011 }
1012
1013 ieee80211_sta_tx(dev, skb, 0);
1014}
1015
1016
1017static int ieee80211_sta_wep_configured(struct net_device *dev)
1018{
1019 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1020 if (!sdata || !sdata->default_key ||
8f20fc24 1021 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 1022 return 0;
1023 return 1;
1024}
1025
1026
1027static void ieee80211_auth_completed(struct net_device *dev,
1028 struct ieee80211_if_sta *ifsta)
1029{
1030 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 1031 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1032 ieee80211_associate(dev, ifsta);
1033}
1034
1035
1036static void ieee80211_auth_challenge(struct net_device *dev,
1037 struct ieee80211_if_sta *ifsta,
1038 struct ieee80211_mgmt *mgmt,
1039 size_t len)
1040{
1041 u8 *pos;
1042 struct ieee802_11_elems elems;
1043
1044 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1045 pos = mgmt->u.auth.variable;
67a4cce4 1046 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1047 if (!elems.challenge) {
1048 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1049 "frame\n", dev->name);
1050 return;
1051 }
1052 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1053 elems.challenge_len + 2, 1);
1054}
1055
9f985b0e
RR		 1056static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1057 u8 dialog_token, u16 status, u16 policy,
1058 u16 buf_size, u16 timeout)
1059{
1060 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1061 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1062 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1063 struct sk_buff *skb;
1064 struct ieee80211_mgmt *mgmt;
1065 u16 capab;
1066
07db2183
RR		 1067 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1068 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1069 if (!skb) {
1070 printk(KERN_DEBUG "%s: failed to allocate buffer "
1071 "for addba resp frame\n", dev->name);
1072 return;
1073 }
1074
1075 skb_reserve(skb, local->hw.extra_tx_headroom);
1076 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1077 memset(mgmt, 0, 24);
1078 memcpy(mgmt->da, da, ETH_ALEN);
1079 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1080 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1081 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1082 else
1083 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1084 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1085 IEEE80211_STYPE_ACTION);
1086
1087 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1088 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1089 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1090 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1091
1092 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1093 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1094 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1095
1096 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1097 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1098 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1099
1100 ieee80211_sta_tx(dev, skb, 0);
1101
1102 return;
1103}
1104
eadc8d9e
RR		 1105void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1106 u16 tid, u8 dialog_token, u16 start_seq_num,
1107 u16 agg_size, u16 timeout)
1108{
1109 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1110 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1111 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1112 struct sk_buff *skb;
1113 struct ieee80211_mgmt *mgmt;
1114 u16 capab;
1115
1116 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1117 sizeof(mgmt->u.action.u.addba_req));
1118
1119
1120 if (!skb) {
1121 printk(KERN_ERR "%s: failed to allocate buffer "
1122 "for addba request frame\n", dev->name);
1123 return;
1124 }
1125 skb_reserve(skb, local->hw.extra_tx_headroom);
1126 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1127 memset(mgmt, 0, 24);
1128 memcpy(mgmt->da, da, ETH_ALEN);
1129 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1130 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1131 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1132 else
1133 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1134
1135 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1136 IEEE80211_STYPE_ACTION);
1137
1138 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1139
1140 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1141 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1142
1143 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1144 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1145 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1146 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1147
1148 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1149
1150 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1151 mgmt->u.action.u.addba_req.start_seq_num =
1152 cpu_to_le16(start_seq_num << 4);
1153
1154 ieee80211_sta_tx(dev, skb, 0);
1155}
1156
9f985b0e
RR		 1157static void ieee80211_sta_process_addba_request(struct net_device *dev,
1158 struct ieee80211_mgmt *mgmt,
1159 size_t len)
1160{
1161 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1162 struct ieee80211_hw *hw = &local->hw;
1163 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1164 struct sta_info *sta;
07db2183
RR		 1165 struct tid_ampdu_rx *tid_agg_rx;
1166 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1167 u8 dialog_token;
07db2183
RR		 1168 int ret = -EOPNOTSUPP;
1169 DECLARE_MAC_BUF(mac);
9f985b0e 1170
d0709a65
JB		 1171 rcu_read_lock();
1172
9f985b0e 1173 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1174 if (!sta) {
1175 rcu_read_unlock();
9f985b0e 1176 return;
d0709a65 1177 }
9f985b0e
RR		 1178
1179 /* extract session parameters from addba request frame */
1180 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1181 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1182 start_seq_num =
1183 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1184
1185 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1186 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1187 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1188 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1189
9f985b0e
RR		 1190 status = WLAN_STATUS_REQUEST_DECLINED;
1191
07db2183
RR		 1192 /* sanity check for incoming parameters:
1193 * check if configuration can support the BA policy
1194 * and if buffer size does not exceeds max value */
1195 if (((ba_policy != 1)
1196 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1197 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1198 status = WLAN_STATUS_INVALID_QOS_PARAM;
1199#ifdef CONFIG_MAC80211_HT_DEBUG
1200 if (net_ratelimit())
7b9d44cd 1201 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1202 "%s on tid %u. policy %d, buffer size %d\n",
1203 print_mac(mac, mgmt->sa), tid, ba_policy,
1204 buf_size);
1205#endif /* CONFIG_MAC80211_HT_DEBUG */
1206 goto end_no_lock;
1207 }
1208 /* determine default buffer size */
1209 if (buf_size == 0) {
8318d78a
JB		 1210 struct ieee80211_supported_band *sband;
1211
1212 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1213 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1214 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1215 }
1216
07db2183
RR		 1217
1218 /* examine state machine */
1219 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1220
cee24a3e 1221 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1222#ifdef CONFIG_MAC80211_HT_DEBUG
1223 if (net_ratelimit())
7b9d44cd 1224 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1225 "%s on tid %u\n",
1226 print_mac(mac, mgmt->sa), tid);
1227#endif /* CONFIG_MAC80211_HT_DEBUG */
1228 goto end;
1229 }
1230
cee24a3e
RR		 1231 /* prepare A-MPDU MLME for Rx aggregation */
1232 sta->ampdu_mlme.tid_rx[tid] =
1233 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1234 if (!sta->ampdu_mlme.tid_rx[tid]) {
1235 if (net_ratelimit())
1236 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1237 tid);
1238 goto end;
1239 }
1240 /* rx timer */
1241 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1242 sta_rx_agg_session_timer_expired;
1243 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1244 (unsigned long)&sta->timer_to_tid[tid];
1245 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1246
1247 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1248
07db2183
RR		 1249 /* prepare reordering buffer */
1250 tid_agg_rx->reorder_buf =
1251 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1252 if (!tid_agg_rx->reorder_buf) {
1253 if (net_ratelimit())
1254 printk(KERN_ERR "can not allocate reordering buffer "
1255 "to tid %d\n", tid);
cee24a3e 1256 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1257 goto end;
1258 }
1259 memset(tid_agg_rx->reorder_buf, 0,
1260 buf_size * sizeof(struct sk_buf *));
1261
1262 if (local->ops->ampdu_action)
1263 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1264 sta->addr, tid, &start_seq_num);
07db2183
RR		 1265#ifdef CONFIG_MAC80211_HT_DEBUG
1266 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1267#endif /* CONFIG_MAC80211_HT_DEBUG */
1268
1269 if (ret) {
1270 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1271 kfree(tid_agg_rx);
1272 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1273 goto end;
1274 }
1275
1276 /* change state and send addba resp */
cee24a3e 1277 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1278 tid_agg_rx->dialog_token = dialog_token;
1279 tid_agg_rx->ssn = start_seq_num;
1280 tid_agg_rx->head_seq_num = start_seq_num;
1281 tid_agg_rx->buf_size = buf_size;
1282 tid_agg_rx->timeout = timeout;
1283 tid_agg_rx->stored_mpdu_num = 0;
1284 status = WLAN_STATUS_SUCCESS;
1285end:
1286 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1287
1288end_no_lock:
d0709a65
JB		 1289 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1290 dialog_token, status, 1, buf_size, timeout);
1291 rcu_read_unlock();
9f985b0e 1292}
f0706e82 1293
eadc8d9e
RR		 1294static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1295 struct ieee80211_mgmt *mgmt,
1296 size_t len)
1297{
1298 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1299 struct ieee80211_hw *hw = &local->hw;
1300 struct sta_info *sta;
1301 u16 capab;
1302 u16 tid;
1303 u8 *state;
1304
d0709a65
JB		 1305 rcu_read_lock();
1306
eadc8d9e 1307 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1308 if (!sta) {
1309 rcu_read_unlock();
eadc8d9e 1310 return;
d0709a65 1311 }
eadc8d9e
RR		 1312
1313 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1314 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1315
cee24a3e 1316 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1317
1318 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1319
cee24a3e
RR		 1320 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1321 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1322 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1323 "%d\n", *state);
1324 goto addba_resp_exit;
1325 }
1326
eadc8d9e 1327 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1328 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
eadc8d9e
RR		 1329 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1330#ifdef CONFIG_MAC80211_HT_DEBUG
1331 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1332#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1333 goto addba_resp_exit;
eadc8d9e
RR		 1334 }
1335
cee24a3e 1336 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1337#ifdef CONFIG_MAC80211_HT_DEBUG
1338 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1339#endif /* CONFIG_MAC80211_HT_DEBUG */
1340 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1341 == WLAN_STATUS_SUCCESS) {
eadc8d9e
RR		 1342 if (*state & HT_ADDBA_RECEIVED_MSK)
1343 printk(KERN_DEBUG "double addBA response\n");
1344
1345 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1346 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e
RR		 1347
1348 if (*state == HT_AGG_STATE_OPERATIONAL) {
1349 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1350 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1351 }
1352
1353 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1354 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1355 } else {
1356 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1357
cee24a3e 1358 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1359 /* this will allow the state check in stop_BA_session */
1360 *state = HT_AGG_STATE_OPERATIONAL;
1361 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1362 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1363 WLAN_BACK_INITIATOR);
1364 }
cee24a3e
RR		 1365
1366addba_resp_exit:
d0709a65 1367 rcu_read_unlock();
eadc8d9e
RR		 1368}
1369
1370void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1371 u16 initiator, u16 reason_code)
07db2183
RR		 1372{
1373 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1374 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1375 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1376 struct sk_buff *skb;
1377 struct ieee80211_mgmt *mgmt;
1378 u16 params;
1379
1380 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1381 sizeof(mgmt->u.action.u.delba));
1382
1383 if (!skb) {
1384 printk(KERN_ERR "%s: failed to allocate buffer "
1385 "for delba frame\n", dev->name);
1386 return;
1387 }
1388
1389 skb_reserve(skb, local->hw.extra_tx_headroom);
1390 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1391 memset(mgmt, 0, 24);
1392 memcpy(mgmt->da, da, ETH_ALEN);
1393 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1394 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1395 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1396 else
1397 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1398 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1399 IEEE80211_STYPE_ACTION);
1400
1401 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1402
1403 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1404 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1405 params = (u16)(initiator << 11); /* bit 11 initiator */
1406 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1407
1408 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1409 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1410
1411 ieee80211_sta_tx(dev, skb, 0);
1412}
1413
1414void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1415 u16 initiator, u16 reason)
1416{
1417 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1418 struct ieee80211_hw *hw = &local->hw;
1419 struct sta_info *sta;
b580781e 1420 int ret, i;
07db2183 1421
d0709a65
JB		 1422 rcu_read_lock();
1423
07db2183 1424 sta = sta_info_get(local, ra);
d0709a65
JB		 1425 if (!sta) {
1426 rcu_read_unlock();
07db2183 1427 return;
d0709a65 1428 }
07db2183
RR		 1429
1430 /* check if TID is in operational state */
1431 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
cee24a3e 1432 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183
RR		 1433 != HT_AGG_STATE_OPERATIONAL) {
1434 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
d0709a65 1435 rcu_read_unlock();
07db2183
RR		 1436 return;
1437 }
cee24a3e 1438 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1439 HT_AGG_STATE_REQ_STOP_BA_MSK |
1440 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1441 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1442
1443 /* stop HW Rx aggregation. ampdu_action existence
1444 * already verified in session init so we add the BUG_ON */
1445 BUG_ON(!local->ops->ampdu_action);
1446
1447 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1448 ra, tid, NULL);
07db2183
RR		 1449 if (ret)
1450 printk(KERN_DEBUG "HW problem - can not stop rx "
1451 "aggergation for tid %d\n", tid);
1452
1453 /* shutdown timer has not expired */
1454 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1455 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1456
1457 /* check if this is a self generated aggregation halt */
1458 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1459 ieee80211_send_delba(dev, ra, tid, 0, reason);
1460
1461 /* free the reordering buffer */
cee24a3e
RR		 1462 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1463 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1464 /* release the reordered frames */
cee24a3e
RR		 1465 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1466 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1467 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1468 }
1469 }
cee24a3e
RR		 1470 /* free resources */
1471 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1472 kfree(sta->ampdu_mlme.tid_rx[tid]);
1473 sta->ampdu_mlme.tid_rx[tid] = NULL;
1474 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1475
d0709a65 1476 rcu_read_unlock();
07db2183
RR		 1477}
1478
eadc8d9e 1479
688b88a4
RR		 1480static void ieee80211_sta_process_delba(struct net_device *dev,
1481 struct ieee80211_mgmt *mgmt, size_t len)
1482{
1483 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1484 struct sta_info *sta;
1485 u16 tid, params;
1486 u16 initiator;
1487 DECLARE_MAC_BUF(mac);
1488
d0709a65
JB		 1489 rcu_read_lock();
1490
688b88a4 1491 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1492 if (!sta) {
1493 rcu_read_unlock();
688b88a4 1494 return;
d0709a65 1495 }
688b88a4
RR		 1496
1497 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1498 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1499 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1500
1501#ifdef CONFIG_MAC80211_HT_DEBUG
1502 if (net_ratelimit())
d92684e6
RR		 1503 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1504 print_mac(mac, mgmt->sa),
2e354ed7 1505 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1506 mgmt->u.action.u.delba.reason_code);
1507#endif /* CONFIG_MAC80211_HT_DEBUG */
1508
1509 if (initiator == WLAN_BACK_INITIATOR)
1510 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1511 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1512 else { /* WLAN_BACK_RECIPIENT */
1513 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
cee24a3e 1514 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6
RR		 1515 HT_AGG_STATE_OPERATIONAL;
1516 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1517 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1518 WLAN_BACK_RECIPIENT);
1519 }
d0709a65 1520 rcu_read_unlock();
688b88a4
RR		 1521}
1522
eadc8d9e
RR		 1523/*
1524 * After sending add Block Ack request we activated a timer until
1525 * add Block Ack response will arrive from the recipient.
1526 * If this timer expires sta_addba_resp_timer_expired will be executed.
1527 */
1528void sta_addba_resp_timer_expired(unsigned long data)
1529{
1530 /* not an elegant detour, but there is no choice as the timer passes
1531 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1532 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e
RR		 1533 * array gives the sta through container_of */
1534 u16 tid = *(int *)data;
1535 struct sta_info *temp_sta = container_of((void *)data,
1536 struct sta_info, timer_to_tid[tid]);
1537
1538 struct ieee80211_local *local = temp_sta->local;
1539 struct ieee80211_hw *hw = &local->hw;
1540 struct sta_info *sta;
1541 u8 *state;
1542
d0709a65
JB		 1543 rcu_read_lock();
1544
eadc8d9e 1545 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1546 if (!sta) {
1547 rcu_read_unlock();
eadc8d9e 1548 return;
d0709a65 1549 }
eadc8d9e 1550
cee24a3e 1551 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1552 /* check if the TID waits for addBA response */
1553 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1554 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1555 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1556 *state = HT_AGG_STATE_IDLE;
1557 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1558 "expecting addBA response there", tid);
1559 goto timer_expired_exit;
1560 }
1561
1562 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1563
1564 /* go through the state check in stop_BA_session */
1565 *state = HT_AGG_STATE_OPERATIONAL;
1566 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1567 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1568 WLAN_BACK_INITIATOR);
1569
1570timer_expired_exit:
d0709a65 1571 rcu_read_unlock();
eadc8d9e
RR		 1572}
1573
07db2183 1574/*
7b9d44cd
RR		 1575 * After accepting the AddBA Request we activated a timer,
1576 * resetting it after each frame that arrives from the originator.
07db2183
RR		 1577 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1578 */
1579void sta_rx_agg_session_timer_expired(unsigned long data)
1580{
1581 /* not an elegant detour, but there is no choice as the timer passes
1582 * only one argument, and verious sta_info are needed here, so init
73651ee6 1583 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1584 * array gives the sta through container_of */
1585 u8 *ptid = (u8 *)data;
1586 u8 *timer_to_id = ptid - *ptid;
1587 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1588 timer_to_tid[0]);
1589
1590 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
d0709a65
JB		 1591 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1592 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1593 WLAN_REASON_QSTA_TIMEOUT);
1594}
1595
85249e5f
RR		 1596void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1597{
1598 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1599 int i;
1600
1601 for (i = 0; i < STA_TID_NUM; i++) {
1602 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1603 WLAN_BACK_INITIATOR);
1604 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1605 WLAN_BACK_RECIPIENT,
1606 WLAN_REASON_QSTA_LEAVE_QBSS);
1607 }
1608}
07db2183 1609
f0706e82
JB		 1610static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1611 struct ieee80211_if_sta *ifsta,
1612 struct ieee80211_mgmt *mgmt,
1613 size_t len)
1614{
1615 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1616 u16 auth_alg, auth_transaction, status_code;
0795af57 1617 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1618
1619 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1620 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1621 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1622 "%s, but not in authenticate state - ignored\n",
1623 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1624 return;
1625 }
1626
1627 if (len < 24 + 6) {
1628 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1629 "received from %s - ignored\n",
1630 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1631 return;
1632 }
1633
51fb61e7 1634 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1635 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1636 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1637 "unknown AP (SA=%s BSSID=%s) - "
1638 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1639 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1640 return;
1641 }
1642
51fb61e7 1643 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1644 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1645 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1646 "unknown BSSID (SA=%s BSSID=%s) - "
1647 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1648 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1649 return;
1650 }
1651
1652 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1653 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1654 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1655
0795af57 1656 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1657 "transaction=%d status=%d)\n",
0795af57 1658 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1659 auth_transaction, status_code);
1660
51fb61e7 1661 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1662 /* IEEE 802.11 standard does not require authentication in IBSS
1663 * networks and most implementations do not seem to use it.
1664 * However, try to reply to authentication attempts if someone
1665 * has actually implemented this.
1666 * TODO: Could implement shared key authentication. */
1667 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1668 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1669 "frame (alg=%d transaction=%d)\n",
1670 dev->name, auth_alg, auth_transaction);
1671 return;
1672 }
1673 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1674 }
1675
1676 if (auth_alg != ifsta->auth_alg ||
1677 auth_transaction != ifsta->auth_transaction) {
1678 printk(KERN_DEBUG "%s: unexpected authentication frame "
1679 "(alg=%d transaction=%d)\n",
1680 dev->name, auth_alg, auth_transaction);
1681 return;
1682 }
1683
1684 if (status_code != WLAN_STATUS_SUCCESS) {
1685 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1686 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1687 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1688 u8 algs[3];
1689 const int num_algs = ARRAY_SIZE(algs);
1690 int i, pos;
1691 algs[0] = algs[1] = algs[2] = 0xff;
1692 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1693 algs[0] = WLAN_AUTH_OPEN;
1694 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1695 algs[1] = WLAN_AUTH_SHARED_KEY;
1696 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1697 algs[2] = WLAN_AUTH_LEAP;
1698 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1699 pos = 0;
1700 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1701 pos = 1;
1702 else
1703 pos = 2;
1704 for (i = 0; i < num_algs; i++) {
1705 pos++;
1706 if (pos >= num_algs)
1707 pos = 0;
1708 if (algs[pos] == ifsta->auth_alg ||
1709 algs[pos] == 0xff)
1710 continue;
1711 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1712 !ieee80211_sta_wep_configured(dev))
1713 continue;
1714 ifsta->auth_alg = algs[pos];
1715 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1716 "next try\n",
1717 dev->name, ifsta->auth_alg);
1718 break;
1719 }
1720 }
1721 return;
1722 }
1723
1724 switch (ifsta->auth_alg) {
1725 case WLAN_AUTH_OPEN:
1726 case WLAN_AUTH_LEAP:
1727 ieee80211_auth_completed(dev, ifsta);
1728 break;
1729 case WLAN_AUTH_SHARED_KEY:
1730 if (ifsta->auth_transaction == 4)
1731 ieee80211_auth_completed(dev, ifsta);
1732 else
1733 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1734 break;
1735 }
1736}
1737
1738
1739static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1740 struct ieee80211_if_sta *ifsta,
1741 struct ieee80211_mgmt *mgmt,
1742 size_t len)
1743{
1744 u16 reason_code;
0795af57 1745 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1746
1747 if (len < 24 + 2) {
1748 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1749 "received from %s - ignored\n",
1750 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1751 return;
1752 }
1753
1754 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1755 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1756 "unknown AP (SA=%s BSSID=%s) - "
1757 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1758 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1759 return;
1760 }
1761
1762 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1763
0795af57 1764 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1765 " (reason=%d)\n",
0795af57 1766 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1767
d6f2da5b 1768 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1769 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1770 }
1771
1772 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1773 ifsta->state == IEEE80211_ASSOCIATE ||
1774 ifsta->state == IEEE80211_ASSOCIATED) {
1775 ifsta->state = IEEE80211_AUTHENTICATE;
1776 mod_timer(&ifsta->timer, jiffies +
1777 IEEE80211_RETRY_AUTH_INTERVAL);
1778 }
1779
1780 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1781 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1782}
1783
1784
1785static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1786 struct ieee80211_if_sta *ifsta,
1787 struct ieee80211_mgmt *mgmt,
1788 size_t len)
1789{
1790 u16 reason_code;
0795af57 1791 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1792
1793 if (len < 24 + 2) {
1794 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1795 "received from %s - ignored\n",
1796 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1797 return;
1798 }
1799
1800 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1801 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1802 "unknown AP (SA=%s BSSID=%s) - "
1803 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1804 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1805 return;
1806 }
1807
1808 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1809
0795af57 1810 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1811 " (reason=%d)\n",
0795af57 1812 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1813
d6f2da5b 1814 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1815 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1816
1817 if (ifsta->state == IEEE80211_ASSOCIATED) {
1818 ifsta->state = IEEE80211_ASSOCIATE;
1819 mod_timer(&ifsta->timer, jiffies +
1820 IEEE80211_RETRY_AUTH_INTERVAL);
1821 }
1822
1823 ieee80211_set_disassoc(dev, ifsta, 0);
1824}
1825
1826
471b3efd 1827static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1828 struct ieee80211_if_sta *ifsta,
1829 struct ieee80211_mgmt *mgmt,
1830 size_t len,
1831 int reassoc)
1832{
471b3efd
JB		 1833 struct ieee80211_local *local = sdata->local;
1834 struct net_device *dev = sdata->dev;
8318d78a 1835 struct ieee80211_supported_band *sband;
f0706e82 1836 struct sta_info *sta;
8318d78a 1837 u64 rates, basic_rates;
f0706e82
JB		 1838 u16 capab_info, status_code, aid;
1839 struct ieee802_11_elems elems;
471b3efd 1840 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1841 u8 *pos;
1842 int i, j;
0795af57 1843 DECLARE_MAC_BUF(mac);
8318d78a 1844 bool have_higher_than_11mbit = false;
f0706e82
JB		 1845
1846 /* AssocResp and ReassocResp have identical structure, so process both
1847 * of them in this function. */
1848
1849 if (ifsta->state != IEEE80211_ASSOCIATE) {
1850 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1851 "%s, but not in associate state - ignored\n",
1852 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1853 return;
1854 }
1855
1856 if (len < 24 + 6) {
1857 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1858 "received from %s - ignored\n",
1859 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1860 return;
1861 }
1862
1863 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1864 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1865 "unknown AP (SA=%s BSSID=%s) - "
1866 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1867 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1868 return;
1869 }
1870
1871 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1872 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1873 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1874
0795af57 1875 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1876 "status=%d aid=%d)\n",
0795af57 1877 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1878 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1879
1880 if (status_code != WLAN_STATUS_SUCCESS) {
1881 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1882 dev->name, status_code);
8a69aa93
DD		 1883 /* if this was a reassociation, ensure we try a "full"
1884 * association next time. This works around some broken APs
1885 * which do not correctly reject reassociation requests. */
d6f2da5b 1886 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1887 return;
1888 }
1889
1dd84aa2
JB		 1890 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1891 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1892 "set\n", dev->name, aid);
1893 aid &= ~(BIT(15) | BIT(14));
1894
f0706e82 1895 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1896 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1897
1898 if (!elems.supp_rates) {
1899 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1900 dev->name);
1901 return;
1902 }
1903
1904 printk(KERN_DEBUG "%s: associated\n", dev->name);
1905 ifsta->aid = aid;
1906 ifsta->ap_capab = capab_info;
1907
1908 kfree(ifsta->assocresp_ies);
1909 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1910 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1911 if (ifsta->assocresp_ies)
1912 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1913
d0709a65
JB		 1914 rcu_read_lock();
1915
f0706e82
JB		 1916 /* Add STA entry for the AP */
1917 sta = sta_info_get(local, ifsta->bssid);
1918 if (!sta) {
1919 struct ieee80211_sta_bss *bss;
73651ee6 1920 int err;
d0709a65 1921
73651ee6
JB		 1922 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1923 if (!sta) {
1924 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1925 " the AP\n", dev->name);
d0709a65 1926 rcu_read_unlock();
f0706e82
JB		 1927 return;
1928 }
65c107ab 1929 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 1930 local->hw.conf.channel->center_freq,
cffdd30d 1931 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1932 if (bss) {
1933 sta->last_rssi = bss->rssi;
1934 sta->last_signal = bss->signal;
1935 sta->last_noise = bss->noise;
1936 ieee80211_rx_bss_put(dev, bss);
1937 }
73651ee6
JB		 1938
1939 err = sta_info_insert(sta);
1940 if (err) {
1941 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1942 " the AP (error %d)\n", dev->name, err);
73651ee6
JB		 1943 rcu_read_unlock();
1944 return;
1945 }
f0706e82
JB		 1946 }
1947
73651ee6
JB		 1948 /*
1949 * FIXME: Do we really need to update the sta_info's information here?
1950 * We already know about the AP (we found it in our list) so it
1951 * should already be filled with the right info, no?
1952 * As is stands, all this is racy because typically we assume
1953 * the information that is filled in here (except flags) doesn't
1954 * change while a STA structure is alive. As such, it should move
1955 * to between the sta_info_alloc() and sta_info_insert() above.
1956 */
1957
238814fd
JB		 1958 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1959 WLAN_STA_AUTHORIZED;
f0706e82
JB		 1960
1961 rates = 0;
8318d78a
JB		 1962 basic_rates = 0;
1963 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1964
f0706e82
JB		 1965 for (i = 0; i < elems.supp_rates_len; i++) {
1966 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1967
1968 if (rate > 110)
1969 have_higher_than_11mbit = true;
1970
1971 for (j = 0; j < sband->n_bitrates; j++) {
1972 if (sband->bitrates[j].bitrate == rate)
f0706e82 1973 rates |= BIT(j);
8318d78a
JB		 1974 if (elems.supp_rates[i] & 0x80)
1975 basic_rates |= BIT(j);
1976 }
f0706e82 1977 }
8318d78a 1978
f0706e82
JB		 1979 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1980 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1981
1982 if (rate > 110)
1983 have_higher_than_11mbit = true;
1984
1985 for (j = 0; j < sband->n_bitrates; j++) {
1986 if (sband->bitrates[j].bitrate == rate)
f0706e82 1987 rates |= BIT(j);
8318d78a
JB		 1988 if (elems.ext_supp_rates[i] & 0x80)
1989 basic_rates |= BIT(j);
1990 }
f0706e82 1991 }
8318d78a
JB		 1992
1993 sta->supp_rates[local->hw.conf.channel->band] = rates;
1994 sdata->basic_rates = basic_rates;
1995
1996 /* cf. IEEE 802.11 9.2.12 */
1997 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1998 have_higher_than_11mbit)
1999 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2000 else
2001 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2002
d3c990fb
RR		 2003 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2004 local->ops->conf_ht) {
2005 struct ieee80211_ht_bss_info bss_info;
2006
2007 ieee80211_ht_cap_ie_to_ht_info(
2008 (struct ieee80211_ht_cap *)
2009 elems.ht_cap_elem, &sta->ht_info);
2010 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2011 (struct ieee80211_ht_addt_info *)
2012 elems.ht_info_elem, &bss_info);
2013 ieee80211_hw_config_ht(local, 1, &sta->ht_info, &bss_info);
2014 }
2015
f0706e82
JB		 2016 rate_control_rate_init(sta, local);
2017
d6f2da5b 2018 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82 2019 sta->flags |= WLAN_STA_WME;
e5f98f2d 2020 rcu_read_unlock();
f0706e82
JB		 2021 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2022 elems.wmm_param_len);
e5f98f2d
JB		 2023 } else
2024 rcu_read_unlock();
f0706e82 2025
8318d78a
JB		 2026 /* set AID, ieee80211_set_associated() will tell the driver */
2027 bss_conf->aid = aid;
2028 ieee80211_set_associated(dev, ifsta, 1);
f0706e82 2029
f0706e82
JB		 2030 ieee80211_associated(dev, ifsta);
2031}
2032
2033
2034/* Caller must hold local->sta_bss_lock */
2035static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2036 struct ieee80211_sta_bss *bss)
2037{
2038 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 2039 u8 hash_idx;
902acc78
JB		 2040
2041 if (bss_mesh_cfg(bss))
2042 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2043 bss_mesh_id_len(bss));
f709fc69 2044 else
f709fc69 2045 hash_idx = STA_HASH(bss->bssid);
902acc78 2046
f709fc69
LCC		 2047 bss->hnext = local->sta_bss_hash[hash_idx];
2048 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 2049}
2050
2051
2052/* Caller must hold local->sta_bss_lock */
2053static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2054 struct ieee80211_sta_bss *bss)
2055{
2056 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2057 struct ieee80211_sta_bss *b, *prev = NULL;
2058 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2059 while (b) {
2060 if (b == bss) {
2061 if (!prev)
2062 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2063 bss->hnext;
2064 else
2065 prev->hnext = bss->hnext;
2066 break;
2067 }
2068 prev = b;
2069 b = b->hnext;
2070 }
2071}
2072
2073
2074static struct ieee80211_sta_bss *
8318d78a 2075ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2076 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2077{
2078 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2079 struct ieee80211_sta_bss *bss;
2080
dd00cc48 2081 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 2082 if (!bss)
2083 return NULL;
f0706e82
JB		 2084 atomic_inc(&bss->users);
2085 atomic_inc(&bss->users);
2086 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2087 bss->freq = freq;
cffdd30d
JL		 2088 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2089 memcpy(bss->ssid, ssid, ssid_len);
2090 bss->ssid_len = ssid_len;
2091 }
f0706e82
JB		 2092
2093 spin_lock_bh(&local->sta_bss_lock);
2094 /* TODO: order by RSSI? */
2095 list_add_tail(&bss->list, &local->sta_bss_list);
2096 __ieee80211_rx_bss_hash_add(dev, bss);
2097 spin_unlock_bh(&local->sta_bss_lock);
2098 return bss;
2099}
2100
f0706e82 2101static struct ieee80211_sta_bss *
8318d78a 2102ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2103 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2104{
2105 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2106 struct ieee80211_sta_bss *bss;
2107
2108 spin_lock_bh(&local->sta_bss_lock);
2109 bss = local->sta_bss_hash[STA_HASH(bssid)];
2110 while (bss) {
902acc78
JB		 2111 if (!bss_mesh_cfg(bss) &&
2112 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2113 bss->freq == freq &&
cffdd30d
JL		 2114 bss->ssid_len == ssid_len &&
2115 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2116 atomic_inc(&bss->users);
2117 break;
2118 }
2119 bss = bss->hnext;
2120 }
2121 spin_unlock_bh(&local->sta_bss_lock);
2122 return bss;
2123}
2124
f709fc69
LCC		 2125#ifdef CONFIG_MAC80211_MESH
2126static struct ieee80211_sta_bss *
2127ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2128 u8 *mesh_cfg, int freq)
2129{
2130 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2131 struct ieee80211_sta_bss *bss;
2132
2133 spin_lock_bh(&local->sta_bss_lock);
2134 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2135 while (bss) {
902acc78
JB		 2136 if (bss_mesh_cfg(bss) &&
2137 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2138 bss->freq == freq &&
2139 mesh_id_len == bss->mesh_id_len &&
2140 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2141 mesh_id_len))) {
2142 atomic_inc(&bss->users);
2143 break;
2144 }
2145 bss = bss->hnext;
2146 }
2147 spin_unlock_bh(&local->sta_bss_lock);
2148 return bss;
2149}
2150
2151static struct ieee80211_sta_bss *
2152ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2153 u8 *mesh_cfg, int freq)
2154{
2155 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2156 struct ieee80211_sta_bss *bss;
2157
2158 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2159 if (!bss)
2160 return NULL;
2161
2162 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
2163 if (!bss->mesh_cfg) {
2164 kfree(bss);
2165 return NULL;
2166 }
2167
2168 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2169 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2170 if (!bss->mesh_id) {
2171 kfree(bss->mesh_cfg);
2172 kfree(bss);
2173 return NULL;
2174 }
2175 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2176 }
2177
2178 atomic_inc(&bss->users);
2179 atomic_inc(&bss->users);
2180 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
2181 bss->mesh_id_len = mesh_id_len;
2182 bss->freq = freq;
2183 spin_lock_bh(&local->sta_bss_lock);
2184 /* TODO: order by RSSI? */
2185 list_add_tail(&bss->list, &local->sta_bss_list);
2186 __ieee80211_rx_bss_hash_add(dev, bss);
2187 spin_unlock_bh(&local->sta_bss_lock);
2188 return bss;
2189}
2190#endif
f0706e82
JB		 2191
2192static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2193{
2194 kfree(bss->wpa_ie);
2195 kfree(bss->rsn_ie);
2196 kfree(bss->wmm_ie);
c7153508 2197 kfree(bss->ht_ie);
902acc78
JB		 2198 kfree(bss_mesh_id(bss));
2199 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2200 kfree(bss);
2201}
2202
2203
2204static void ieee80211_rx_bss_put(struct net_device *dev,
2205 struct ieee80211_sta_bss *bss)
2206{
2207 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2208 if (!atomic_dec_and_test(&bss->users))
2209 return;
2210
2211 spin_lock_bh(&local->sta_bss_lock);
2212 __ieee80211_rx_bss_hash_del(dev, bss);
2213 list_del(&bss->list);
2214 spin_unlock_bh(&local->sta_bss_lock);
2215 ieee80211_rx_bss_free(bss);
2216}
2217
2218
2219void ieee80211_rx_bss_list_init(struct net_device *dev)
2220{
2221 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2222 spin_lock_init(&local->sta_bss_lock);
2223 INIT_LIST_HEAD(&local->sta_bss_list);
2224}
2225
2226
2227void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2228{
2229 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2230 struct ieee80211_sta_bss *bss, *tmp;
2231
2232 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2233 ieee80211_rx_bss_put(dev, bss);
2234}
2235
2236
a607268a
BR		 2237static int ieee80211_sta_join_ibss(struct net_device *dev,
2238 struct ieee80211_if_sta *ifsta,
2239 struct ieee80211_sta_bss *bss)
2240{
2241 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2242 int res, rates, i, j;
2243 struct sk_buff *skb;
2244 struct ieee80211_mgmt *mgmt;
2245 struct ieee80211_tx_control control;
2246 struct rate_selection ratesel;
2247 u8 *pos;
2248 struct ieee80211_sub_if_data *sdata;
2249 struct ieee80211_supported_band *sband;
2250
2251 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2252
9dd6aed0
JB		 2253 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2254
a607268a 2255 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2256 sta_info_flush_delayed(sdata);
a607268a
BR		 2257
2258 if (local->ops->reset_tsf) {
2259 /* Reset own TSF to allow time synchronization work. */
2260 local->ops->reset_tsf(local_to_hw(local));
2261 }
2262 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2263 res = ieee80211_if_config(dev);
2264 if (res)
2265 return res;
2266
2267 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2268
a607268a
BR		 2269 sdata->drop_unencrypted = bss->capability &
2270 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2271
2272 res = ieee80211_set_freq(local, bss->freq);
2273
2274 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2275 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2276 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2277 return -1;
2278 }
2279
2280 /* Set beacon template */
2281 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2282 do {
2283 if (!skb)
2284 break;
2285
2286 skb_reserve(skb, local->hw.extra_tx_headroom);
2287
2288 mgmt = (struct ieee80211_mgmt *)
2289 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2290 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2291 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2292 IEEE80211_STYPE_BEACON);
2293 memset(mgmt->da, 0xff, ETH_ALEN);
2294 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2295 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2296 mgmt->u.beacon.beacon_int =
2297 cpu_to_le16(local->hw.conf.beacon_int);
2298 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2299
2300 pos = skb_put(skb, 2 + ifsta->ssid_len);
2301 *pos++ = WLAN_EID_SSID;
2302 *pos++ = ifsta->ssid_len;
2303 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2304
2305 rates = bss->supp_rates_len;
2306 if (rates > 8)
2307 rates = 8;
2308 pos = skb_put(skb, 2 + rates);
2309 *pos++ = WLAN_EID_SUPP_RATES;
2310 *pos++ = rates;
2311 memcpy(pos, bss->supp_rates, rates);
2312
2313 if (bss->band == IEEE80211_BAND_2GHZ) {
2314 pos = skb_put(skb, 2 + 1);
2315 *pos++ = WLAN_EID_DS_PARAMS;
2316 *pos++ = 1;
2317 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2318 }
2319
2320 pos = skb_put(skb, 2 + 2);
2321 *pos++ = WLAN_EID_IBSS_PARAMS;
2322 *pos++ = 2;
2323 /* FIX: set ATIM window based on scan results */
2324 *pos++ = 0;
2325 *pos++ = 0;
2326
2327 if (bss->supp_rates_len > 8) {
2328 rates = bss->supp_rates_len - 8;
2329 pos = skb_put(skb, 2 + rates);
2330 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2331 *pos++ = rates;
2332 memcpy(pos, &bss->supp_rates[8], rates);
2333 }
2334
2335 memset(&control, 0, sizeof(control));
2336 rate_control_get_rate(dev, sband, skb, &ratesel);
2337 if (!ratesel.rate) {
2338 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2339 "for IBSS beacon\n", dev->name);
2340 break;
2341 }
2342 control.vif = &sdata->vif;
2343 control.tx_rate = ratesel.rate;
2344 if (sdata->bss_conf.use_short_preamble &&
2345 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2346 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2347 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2348 control.flags |= IEEE80211_TXCTL_NO_ACK;
2349 control.retry_limit = 1;
2350
2351 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2352 if (ifsta->probe_resp) {
2353 mgmt = (struct ieee80211_mgmt *)
2354 ifsta->probe_resp->data;
2355 mgmt->frame_control =
2356 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2357 IEEE80211_STYPE_PROBE_RESP);
2358 } else {
2359 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2360 "template for IBSS\n", dev->name);
2361 }
2362
2363 if (local->ops->beacon_update &&
2364 local->ops->beacon_update(local_to_hw(local),
2365 skb, &control) == 0) {
2366 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2367 "template\n", dev->name);
2368 skb = NULL;
2369 }
2370
2371 rates = 0;
2372 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2373 for (i = 0; i < bss->supp_rates_len; i++) {
2374 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2375 for (j = 0; j < sband->n_bitrates; j++)
2376 if (sband->bitrates[j].bitrate == bitrate)
2377 rates |= BIT(j);
2378 }
2379 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
e2839d8f
VK		 2380
2381 ieee80211_sta_def_wmm_params(dev, bss, 1);
a607268a
BR		 2382 } while (0);
2383
2384 if (skb) {
2385 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2386 "template\n", dev->name);
2387 dev_kfree_skb(skb);
2388 }
2389
2390 ifsta->state = IEEE80211_IBSS_JOINED;
2391 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2392
2393 ieee80211_rx_bss_put(dev, bss);
2394
2395 return res;
2396}
2397
f709fc69
LCC		 2398u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2399 struct ieee802_11_elems *elems,
2400 enum ieee80211_band band)
2401{
2402 struct ieee80211_supported_band *sband;
2403 struct ieee80211_rate *bitrates;
2404 size_t num_rates;
2405 u64 supp_rates;
2406 int i, j;
2407 sband = local->hw.wiphy->bands[band];
2408
2409 if (!sband) {
2410 WARN_ON(1);
2411 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2412 }
2413
2414 bitrates = sband->bitrates;
2415 num_rates = sband->n_bitrates;
2416 supp_rates = 0;
2417 for (i = 0; i < elems->supp_rates_len +
2418 elems->ext_supp_rates_len; i++) {
2419 u8 rate = 0;
2420 int own_rate;
2421 if (i < elems->supp_rates_len)
2422 rate = elems->supp_rates[i];
2423 else if (elems->ext_supp_rates)
2424 rate = elems->ext_supp_rates
2425 [i - elems->supp_rates_len];
2426 own_rate = 5 * (rate & 0x7f);
2427 for (j = 0; j < num_rates; j++)
2428 if (bitrates[j].bitrate == own_rate)
2429 supp_rates |= BIT(j);
2430 }
2431 return supp_rates;
2432}
2433
a607268a 2434
f0706e82
JB		 2435static void ieee80211_rx_bss_info(struct net_device *dev,
2436 struct ieee80211_mgmt *mgmt,
2437 size_t len,
2438 struct ieee80211_rx_status *rx_status,
2439 int beacon)
2440{
2441 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2442 struct ieee802_11_elems elems;
2443 size_t baselen;
8318d78a 2444 int freq, clen;
f0706e82
JB		 2445 struct ieee80211_sta_bss *bss;
2446 struct sta_info *sta;
2447 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2448 u64 beacon_timestamp, rx_timestamp;
fab7d4a2 2449 struct ieee80211_channel *channel;
0795af57
JP		 2450 DECLARE_MAC_BUF(mac);
2451 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2452
2453 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2454 return; /* ignore ProbeResp to foreign address */
2455
2456#if 0
0795af57 2457 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2458 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2459 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2460#endif
2461
2462 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2463 if (baselen > len)
2464 return;
2465
9d9bf77d 2466 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
67a4cce4 2467 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2468
902acc78
JB		 2469 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2470 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2471 u64 rates = ieee80211_sta_get_rates(local, &elems,
2472 rx_status->band);
2473
2474 mesh_neighbour_update(mgmt->sa, rates, dev,
2475 mesh_peer_accepts_plinks(&elems, dev));
2476 }
f709fc69 2477
d0709a65
JB		 2478 rcu_read_lock();
2479
51fb61e7 2480 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2481 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2482 (sta = sta_info_get(local, mgmt->sa))) {
f709fc69
LCC		 2483 u64 prev_rates;
2484 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2485 rx_status->band);
f0706e82 2486
8318d78a
JB		 2487 prev_rates = sta->supp_rates[rx_status->band];
2488 sta->supp_rates[rx_status->band] &= supp_rates;
2489 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2490 /* No matching rates - this should not really happen.
2491 * Make sure that at least one rate is marked
2492 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2493 sta->supp_rates[rx_status->band] =
2494 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2495 }
8318d78a 2496 if (sta->supp_rates[rx_status->band] != prev_rates) {
f0706e82 2497 printk(KERN_DEBUG "%s: updated supp_rates set for "
8318d78a
JB		 2498 "%s based on beacon info (0x%llx & 0x%llx -> "
2499 "0x%llx)\n",
2500 dev->name, print_mac(mac, sta->addr),
2501 (unsigned long long) prev_rates,
2502 (unsigned long long) supp_rates,
2503 (unsigned long long) sta->supp_rates[rx_status->band]);
f0706e82 2504 }
f0706e82
JB		 2505 }
2506
d0709a65
JB		 2507 rcu_read_unlock();
2508
f0706e82 2509 if (elems.ds_params && elems.ds_params_len == 1)
8318d78a 2510 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
f0706e82 2511 else
8318d78a 2512 freq = rx_status->freq;
f0706e82 2513
fab7d4a2
JB		 2514 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2515
2516 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2517 return;
2518
f709fc69
LCC		 2519#ifdef CONFIG_MAC80211_MESH
2520 if (elems.mesh_config)
2521 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2522 elems.mesh_id_len, elems.mesh_config, freq);
2523 else
2524#endif
2525 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
cffdd30d 2526 elems.ssid, elems.ssid_len);
f709fc69
LCC		 2527 if (!bss) {
2528#ifdef CONFIG_MAC80211_MESH
2529 if (elems.mesh_config)
2530 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
2531 elems.mesh_id_len, elems.mesh_config, freq);
2532 else
2533#endif
2534 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2535 elems.ssid, elems.ssid_len);
f0706e82
JB		 2536 if (!bss)
2537 return;
2538 } else {
2539#if 0
2540 /* TODO: order by RSSI? */
2541 spin_lock_bh(&local->sta_bss_lock);
2542 list_move_tail(&bss->list, &local->sta_bss_list);
2543 spin_unlock_bh(&local->sta_bss_lock);
2544#endif
2545 }
2546
8318d78a
JB		 2547 bss->band = rx_status->band;
2548
9d9bf77d
BR		 2549 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2550 bss->probe_resp && beacon) {
2551 /* STA mode:
2552 * Do not allow beacon to override data from Probe Response. */
f0706e82
JB		 2553 ieee80211_rx_bss_put(dev, bss);
2554 return;
2555 }
2556
5628221c
DD		 2557 /* save the ERP value so that it is available at association time */
2558 if (elems.erp_info && elems.erp_info_len >= 1) {
2559 bss->erp_value = elems.erp_info[0];
2560 bss->has_erp_value = 1;
2561 }
2562
f0706e82
JB		 2563 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2564 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2565
2566 bss->supp_rates_len = 0;
2567 if (elems.supp_rates) {
2568 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2569 if (clen > elems.supp_rates_len)
2570 clen = elems.supp_rates_len;
2571 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2572 clen);
2573 bss->supp_rates_len += clen;
2574 }
2575 if (elems.ext_supp_rates) {
2576 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2577 if (clen > elems.ext_supp_rates_len)
2578 clen = elems.ext_supp_rates_len;
2579 memcpy(&bss->supp_rates[bss->supp_rates_len],
2580 elems.ext_supp_rates, clen);
2581 bss->supp_rates_len += clen;
2582 }
2583
2584 if (elems.wpa &&
2585 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2586 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2587 kfree(bss->wpa_ie);
2588 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2589 if (bss->wpa_ie) {
2590 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2591 bss->wpa_ie_len = elems.wpa_len + 2;
2592 } else
2593 bss->wpa_ie_len = 0;
2594 } else if (!elems.wpa && bss->wpa_ie) {
2595 kfree(bss->wpa_ie);
2596 bss->wpa_ie = NULL;
2597 bss->wpa_ie_len = 0;
2598 }
2599
2600 if (elems.rsn &&
2601 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2602 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2603 kfree(bss->rsn_ie);
2604 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2605 if (bss->rsn_ie) {
2606 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2607 bss->rsn_ie_len = elems.rsn_len + 2;
2608 } else
2609 bss->rsn_ie_len = 0;
2610 } else if (!elems.rsn && bss->rsn_ie) {
2611 kfree(bss->rsn_ie);
2612 bss->rsn_ie = NULL;
2613 bss->rsn_ie_len = 0;
2614 }
2615
2616 if (elems.wmm_param &&
2617 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2618 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2619 kfree(bss->wmm_ie);
2620 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2621 if (bss->wmm_ie) {
2622 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2623 elems.wmm_param_len + 2);
2624 bss->wmm_ie_len = elems.wmm_param_len + 2;
2625 } else
2626 bss->wmm_ie_len = 0;
2627 } else if (!elems.wmm_param && bss->wmm_ie) {
2628 kfree(bss->wmm_ie);
2629 bss->wmm_ie = NULL;
2630 bss->wmm_ie_len = 0;
2631 }
c7153508
RR		 2632 if (elems.ht_cap_elem &&
2633 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2634 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2635 kfree(bss->ht_ie);
2636 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2637 if (bss->ht_ie) {
2638 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2639 elems.ht_cap_elem_len + 2);
2640 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2641 } else
2642 bss->ht_ie_len = 0;
2643 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2644 kfree(bss->ht_ie);
2645 bss->ht_ie = NULL;
2646 bss->ht_ie_len = 0;
2647 }
f0706e82 2648
9d9bf77d 2649 bss->timestamp = beacon_timestamp;
f0706e82
JB		 2650 bss->last_update = jiffies;
2651 bss->rssi = rx_status->ssi;
2652 bss->signal = rx_status->signal;
2653 bss->noise = rx_status->noise;
2654 if (!beacon)
2655 bss->probe_resp++;
9d9bf77d
BR		 2656
2657 /* check if we need to merge IBSS */
2658 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2659 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2660 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d
BR		 2661 bss->freq == local->oper_channel->center_freq &&
2662 elems.ssid_len == sdata->u.sta.ssid_len &&
2663 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2664 if (rx_status->flag & RX_FLAG_TSFT) {
2665 /* in order for correct IBSS merging we need mactime
2666 *
2667 * since mactime is defined as the time the first data
2668 * symbol of the frame hits the PHY, and the timestamp
2669 * of the beacon is defined as "the time that the data
2670 * symbol containing the first bit of the timestamp is
2671 * transmitted to the PHY plus the transmitting STA’s
2672 * delays through its local PHY from the MAC-PHY
2673 * interface to its interface with the WM"
2674 * (802.11 11.1.2) - equals the time this bit arrives at
2675 * the receiver - we have to take into account the
2676 * offset between the two.
2677 * e.g: at 1 MBit that means mactime is 192 usec earlier
2678 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2679 */
2680 int rate = local->hw.wiphy->bands[rx_status->band]->
2681 bitrates[rx_status->rate_idx].bitrate;
2682 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2683 } else if (local && local->ops && local->ops->get_tsf)
2684 /* second best option: get current TSF */
2685 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2686 else
2687 /* can't merge without knowing the TSF */
2688 rx_timestamp = -1LLU;
2689#ifdef CONFIG_MAC80211_IBSS_DEBUG
2690 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2691 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2692 print_mac(mac, mgmt->sa),
2693 print_mac(mac2, mgmt->bssid),
2694 (unsigned long long)rx_timestamp,
2695 (unsigned long long)beacon_timestamp,
2696 (unsigned long long)(rx_timestamp - beacon_timestamp),
2697 jiffies);
2698#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2699 if (beacon_timestamp > rx_timestamp) {
fba4a1e6 2700#ifndef CONFIG_MAC80211_IBSS_DEBUG
d97cf015 2701 if (net_ratelimit())
fba4a1e6 2702#endif
9d9bf77d
BR		 2703 printk(KERN_DEBUG "%s: beacon TSF higher than "
2704 "local TSF - IBSS merge with BSSID %s\n",
2705 dev->name, print_mac(mac, mgmt->bssid));
2706 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2707 ieee80211_ibss_add_sta(dev, NULL,
2708 mgmt->bssid, mgmt->sa);
2709 }
2710 }
2711
f0706e82
JB		 2712 ieee80211_rx_bss_put(dev, bss);
2713}
2714
2715
2716static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2717 struct ieee80211_mgmt *mgmt,
2718 size_t len,
2719 struct ieee80211_rx_status *rx_status)
2720{
2721 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2722}
2723
2724
2725static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2726 struct ieee80211_mgmt *mgmt,
2727 size_t len,
2728 struct ieee80211_rx_status *rx_status)
2729{
f0706e82
JB		 2730 struct ieee80211_sub_if_data *sdata;
2731 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2732 size_t baselen;
2733 struct ieee802_11_elems elems;
d3c990fb
RR		 2734 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2735 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2736 u32 changed = 0;
f0706e82
JB		 2737
2738 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2739
2740 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2741 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2742 return;
2743 ifsta = &sdata->u.sta;
2744
d6f2da5b 2745 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2746 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2747 return;
2748
2749 /* Process beacon from the current BSS */
2750 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2751 if (baselen > len)
2752 return;
2753
67a4cce4 2754 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2755
5628221c 2756 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2757 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
f0706e82 2758
d3c990fb
RR		 2759 if (elems.ht_cap_elem && elems.ht_info_elem &&
2760 elems.wmm_param && local->ops->conf_ht &&
2761 conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
2762 struct ieee80211_ht_bss_info bss_info;
2763
2764 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2765 (struct ieee80211_ht_addt_info *)
2766 elems.ht_info_elem, &bss_info);
2767 /* check if AP changed bss inforamation */
2768 if ((conf->ht_bss_conf.primary_channel !=
2769 bss_info.primary_channel) ||
2770 (conf->ht_bss_conf.bss_cap != bss_info.bss_cap) ||
2771 (conf->ht_bss_conf.bss_op_mode != bss_info.bss_op_mode))
2772 ieee80211_hw_config_ht(local, 1, &conf->ht_conf,
2773 &bss_info);
2774 }
2775
d6f2da5b 2776 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2777 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2778 elems.wmm_param_len);
2779 }
471b3efd
JB		 2780
2781 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2782}
2783
2784
2785static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2786 struct ieee80211_if_sta *ifsta,
2787 struct ieee80211_mgmt *mgmt,
2788 size_t len,
2789 struct ieee80211_rx_status *rx_status)
2790{
2791 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2792 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2793 int tx_last_beacon;
2794 struct sk_buff *skb;
2795 struct ieee80211_mgmt *resp;
2796 u8 *pos, *end;
0795af57
JP		 2797 DECLARE_MAC_BUF(mac);
2798#ifdef CONFIG_MAC80211_IBSS_DEBUG
2799 DECLARE_MAC_BUF(mac2);
2800 DECLARE_MAC_BUF(mac3);
2801#endif
f0706e82 2802
51fb61e7 2803 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2804 ifsta->state != IEEE80211_IBSS_JOINED ||
2805 len < 24 + 2 || !ifsta->probe_resp)
2806 return;
2807
2808 if (local->ops->tx_last_beacon)
2809 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2810 else
2811 tx_last_beacon = 1;
2812
2813#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2814 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2815 "%s (tx_last_beacon=%d)\n",
2816 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2817 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2818#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2819
2820 if (!tx_last_beacon)
2821 return;
2822
2823 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2824 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2825 return;
2826
2827 end = ((u8 *) mgmt) + len;
2828 pos = mgmt->u.probe_req.variable;
2829 if (pos[0] != WLAN_EID_SSID ||
2830 pos + 2 + pos[1] > end) {
2831 if (net_ratelimit()) {
2832 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2833 "from %s\n",
2834 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2835 }
2836 return;
2837 }
2838 if (pos[1] != 0 &&
2839 (pos[1] != ifsta->ssid_len ||
2840 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2841 /* Ignore ProbeReq for foreign SSID */
2842 return;
2843 }
2844
2845 /* Reply with ProbeResp */
0ec0b7ac 2846 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2847 if (!skb)
2848 return;
2849
2850 resp = (struct ieee80211_mgmt *) skb->data;
2851 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2852#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2853 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2854 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2855#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2856 ieee80211_sta_tx(dev, skb, 0);
2857}
2858
4e20cb29
JB		 2859static void ieee80211_rx_mgmt_action(struct net_device *dev,
2860 struct ieee80211_if_sta *ifsta,
2861 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2862 size_t len,
2863 struct ieee80211_rx_status *rx_status)
9f985b0e 2864{
f709fc69 2865 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f709fc69 2866
9f985b0e
RR		 2867 if (len < IEEE80211_MIN_ACTION_SIZE)
2868 return;
2869
2870 switch (mgmt->u.action.category) {
2871 case WLAN_CATEGORY_BACK:
2872 switch (mgmt->u.action.u.addba_req.action_code) {
2873 case WLAN_ACTION_ADDBA_REQ:
2874 if (len < (IEEE80211_MIN_ACTION_SIZE +
2875 sizeof(mgmt->u.action.u.addba_req)))
2876 break;
2877 ieee80211_sta_process_addba_request(dev, mgmt, len);
2878 break;
eadc8d9e
RR		 2879 case WLAN_ACTION_ADDBA_RESP:
2880 if (len < (IEEE80211_MIN_ACTION_SIZE +
2881 sizeof(mgmt->u.action.u.addba_resp)))
2882 break;
2883 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2884 break;
688b88a4
RR		 2885 case WLAN_ACTION_DELBA:
2886 if (len < (IEEE80211_MIN_ACTION_SIZE +
2887 sizeof(mgmt->u.action.u.delba)))
2888 break;
2889 ieee80211_sta_process_delba(dev, mgmt, len);
2890 break;
9f985b0e
RR		 2891 default:
2892 if (net_ratelimit())
688b88a4 2893 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2894 dev->name);
2895 break;
2896 }
2897 break;
f709fc69 2898 case PLINK_CATEGORY:
902acc78 2899 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2900 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2901 break;
f709fc69 2902 case MESH_PATH_SEL_CATEGORY:
902acc78 2903 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2904 mesh_rx_path_sel_frame(dev, mgmt, len);
2905 break;
9f985b0e 2906 default:
f709fc69
LCC		 2907 if (net_ratelimit())
2908 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2909 "category=%d\n", dev->name, mgmt->u.action.category);
9f985b0e
RR		 2910 break;
2911 }
2912}
f0706e82
JB		 2913
2914void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2915 struct ieee80211_rx_status *rx_status)
2916{
2917 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2918 struct ieee80211_sub_if_data *sdata;
2919 struct ieee80211_if_sta *ifsta;
2920 struct ieee80211_mgmt *mgmt;
2921 u16 fc;
2922
2923 if (skb->len < 24)
2924 goto fail;
2925
2926 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2927 ifsta = &sdata->u.sta;
2928
2929 mgmt = (struct ieee80211_mgmt *) skb->data;
2930 fc = le16_to_cpu(mgmt->frame_control);
2931
2932 switch (fc & IEEE80211_FCTL_STYPE) {
2933 case IEEE80211_STYPE_PROBE_REQ:
2934 case IEEE80211_STYPE_PROBE_RESP:
2935 case IEEE80211_STYPE_BEACON:
f709fc69 2936 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2937 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2938 case IEEE80211_STYPE_AUTH:
2939 case IEEE80211_STYPE_ASSOC_RESP:
2940 case IEEE80211_STYPE_REASSOC_RESP:
2941 case IEEE80211_STYPE_DEAUTH:
2942 case IEEE80211_STYPE_DISASSOC:
2943 skb_queue_tail(&ifsta->skb_queue, skb);
2944 queue_work(local->hw.workqueue, &ifsta->work);
2945 return;
2946 default:
2947 printk(KERN_DEBUG "%s: received unknown management frame - "
2948 "stype=%d\n", dev->name,
2949 (fc & IEEE80211_FCTL_STYPE) >> 4);
2950 break;
2951 }
2952
2953 fail:
2954 kfree_skb(skb);
2955}
2956
2957
2958static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2959 struct sk_buff *skb)
2960{
2961 struct ieee80211_rx_status *rx_status;
2962 struct ieee80211_sub_if_data *sdata;
2963 struct ieee80211_if_sta *ifsta;
2964 struct ieee80211_mgmt *mgmt;
2965 u16 fc;
2966
2967 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2968 ifsta = &sdata->u.sta;
2969
2970 rx_status = (struct ieee80211_rx_status *) skb->cb;
2971 mgmt = (struct ieee80211_mgmt *) skb->data;
2972 fc = le16_to_cpu(mgmt->frame_control);
2973
2974 switch (fc & IEEE80211_FCTL_STYPE) {
2975 case IEEE80211_STYPE_PROBE_REQ:
2976 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2977 rx_status);
2978 break;
2979 case IEEE80211_STYPE_PROBE_RESP:
2980 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2981 break;
2982 case IEEE80211_STYPE_BEACON:
2983 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2984 break;
2985 case IEEE80211_STYPE_AUTH:
2986 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2987 break;
2988 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2989 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2990 break;
2991 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2992 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2993 break;
2994 case IEEE80211_STYPE_DEAUTH:
2995 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
2996 break;
2997 case IEEE80211_STYPE_DISASSOC:
2998 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
2999 break;
9f985b0e 3000 case IEEE80211_STYPE_ACTION:
f709fc69 3001 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
9f985b0e 3002 break;
f0706e82
JB		 3003 }
3004
3005 kfree_skb(skb);
3006}
3007
3008
9ae54c84 3009ieee80211_rx_result
ece8eddd
ZY		 3010ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3011 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 3012{
3013 struct ieee80211_mgmt *mgmt;
3014 u16 fc;
3015
ece8eddd 3016 if (skb->len < 2)
e4c26add 3017 return RX_DROP_UNUSABLE;
f0706e82
JB		 3018
3019 mgmt = (struct ieee80211_mgmt *) skb->data;
3020 fc = le16_to_cpu(mgmt->frame_control);
3021
ece8eddd 3022 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
9ae54c84 3023 return RX_CONTINUE;
ece8eddd
ZY		 3024
3025 if (skb->len < 24)
e4c26add 3026 return RX_DROP_MONITOR;
ece8eddd 3027
f0706e82
JB		 3028 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3029 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3030 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3031 skb->len, rx_status);
ece8eddd 3032 dev_kfree_skb(skb);
9ae54c84 3033 return RX_QUEUED;
f0706e82
JB		 3034 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3035 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3036 rx_status);
ece8eddd 3037 dev_kfree_skb(skb);
9ae54c84 3038 return RX_QUEUED;
f0706e82
JB		 3039 }
3040 }
9ae54c84 3041 return RX_CONTINUE;
f0706e82
JB		 3042}
3043
3044
3045static int ieee80211_sta_active_ibss(struct net_device *dev)
3046{
3047 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3048 int active = 0;
3049 struct sta_info *sta;
d0709a65 3050 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3051
d0709a65
JB		 3052 rcu_read_lock();
3053
3054 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3055 if (sta->sdata == sdata &&
f0706e82
JB		 3056 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3057 jiffies)) {
3058 active++;
3059 break;
3060 }
3061 }
d0709a65
JB		 3062
3063 rcu_read_unlock();
f0706e82
JB		 3064
3065 return active;
3066}
3067
3068
f709fc69 3069static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
f0706e82
JB		 3070{
3071 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3072 struct sta_info *sta, *tmp;
be8755e1 3073 LIST_HEAD(tmp_list);
0795af57 3074 DECLARE_MAC_BUF(mac);
d0709a65 3075 unsigned long flags;
f0706e82 3076
d0709a65 3077 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3078 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3079 if (time_after(jiffies, sta->last_rx + exp_time)) {
0795af57
JP		 3080 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3081 dev->name, print_mac(mac, sta->addr));
cb585bcc 3082 __sta_info_unlink(&sta);
d0709a65
JB		 3083 if (sta)
3084 list_add(&sta->list, &tmp_list);
f0706e82 3085 }
d0709a65 3086 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3087
d0709a65
JB		 3088 synchronize_rcu();
3089
3090 rtnl_lock();
3091 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3092 sta_info_destroy(sta);
3093 rtnl_unlock();
f0706e82
JB		 3094}
3095
3096
3097static void ieee80211_sta_merge_ibss(struct net_device *dev,
3098 struct ieee80211_if_sta *ifsta)
3099{
3100 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3101
f709fc69 3102 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
f0706e82
JB		 3103 if (ieee80211_sta_active_ibss(dev))
3104 return;
3105
3106 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3107 "IBSS networks with same SSID (merge)\n", dev->name);
3108 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3109}
3110
3111
f709fc69
LCC		 3112#ifdef CONFIG_MAC80211_MESH
3113static void ieee80211_mesh_housekeeping(struct net_device *dev,
3114 struct ieee80211_if_sta *ifsta)
3115{
3116 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3117 bool free_plinks;
3118
3119 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3120 mesh_path_expire(dev);
3121
3122 free_plinks = mesh_plink_availables(sdata);
3123 if (free_plinks != sdata->u.sta.accepting_plinks)
3124 ieee80211_if_config_beacon(dev);
3125
3126 mod_timer(&ifsta->timer, jiffies +
3127 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3128}
3129
3130
3131void ieee80211_start_mesh(struct net_device *dev)
3132{
3133 struct ieee80211_if_sta *ifsta;
3134 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3135 ifsta = &sdata->u.sta;
3136 ifsta->state = IEEE80211_MESH_UP;
3137 ieee80211_sta_timer((unsigned long)sdata);
3138}
3139#endif
3140
3141
f0706e82
JB		 3142void ieee80211_sta_timer(unsigned long data)
3143{
3144 struct ieee80211_sub_if_data *sdata =
3145 (struct ieee80211_sub_if_data *) data;
3146 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3147 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3148
3149 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3150 queue_work(local->hw.workqueue, &ifsta->work);
3151}
3152
f0706e82
JB		 3153void ieee80211_sta_work(struct work_struct *work)
3154{
3155 struct ieee80211_sub_if_data *sdata =
3156 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3157 struct net_device *dev = sdata->dev;
3158 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3159 struct ieee80211_if_sta *ifsta;
3160 struct sk_buff *skb;
3161
3162 if (!netif_running(dev))
3163 return;
3164
ece8eddd 3165 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3166 return;
3167
51fb61e7 3168 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
f709fc69
LCC		 3169 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3170 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
f0706e82 3171 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 3172 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 3173 return;
3174 }
3175 ifsta = &sdata->u.sta;
3176
3177 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3178 ieee80211_sta_rx_queued_mgmt(dev, skb);
3179
f709fc69 3180#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3181 if (ifsta->preq_queue_len &&
3182 time_after(jiffies,
3183 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f709fc69
LCC		 3184 mesh_path_start_discovery(dev);
3185#endif
3186
f0706e82
JB		 3187 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3188 ifsta->state != IEEE80211_ASSOCIATE &&
3189 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 3190 if (ifsta->scan_ssid_len)
3191 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3192 else
3193 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 3194 return;
3195 }
3196
3197 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3198 if (ieee80211_sta_config_auth(dev, ifsta))
3199 return;
3200 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3201 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3202 return;
3203
3204 switch (ifsta->state) {
3205 case IEEE80211_DISABLED:
3206 break;
3207 case IEEE80211_AUTHENTICATE:
3208 ieee80211_authenticate(dev, ifsta);
3209 break;
3210 case IEEE80211_ASSOCIATE:
3211 ieee80211_associate(dev, ifsta);
3212 break;
3213 case IEEE80211_ASSOCIATED:
3214 ieee80211_associated(dev, ifsta);
3215 break;
3216 case IEEE80211_IBSS_SEARCH:
3217 ieee80211_sta_find_ibss(dev, ifsta);
3218 break;
3219 case IEEE80211_IBSS_JOINED:
3220 ieee80211_sta_merge_ibss(dev, ifsta);
3221 break;
f709fc69
LCC		 3222#ifdef CONFIG_MAC80211_MESH
3223 case IEEE80211_MESH_UP:
3224 ieee80211_mesh_housekeeping(dev, ifsta);
3225 break;
3226#endif
f0706e82
JB		 3227 default:
3228 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3229 ifsta->state);
3230 break;
3231 }
3232
3233 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3234 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3235 "mixed-cell disabled - disassociate\n", dev->name);
3236
3237 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3238 ieee80211_set_disassoc(dev, ifsta, 0);
3239 }
3240}
3241
3242
3243static void ieee80211_sta_reset_auth(struct net_device *dev,
3244 struct ieee80211_if_sta *ifsta)
3245{
3246 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3247
3248 if (local->ops->reset_tsf) {
3249 /* Reset own TSF to allow time synchronization work. */
3250 local->ops->reset_tsf(local_to_hw(local));
3251 }
3252
3253 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3254
3255
3256 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3257 ifsta->auth_alg = WLAN_AUTH_OPEN;
3258 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3259 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3260 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3261 ifsta->auth_alg = WLAN_AUTH_LEAP;
3262 else
3263 ifsta->auth_alg = WLAN_AUTH_OPEN;
3264 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3265 ifsta->auth_alg);
3266 ifsta->auth_transaction = -1;
d6f2da5b
JS		 3267 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3268 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 3269 netif_carrier_off(dev);
3270}
3271
3272
3273void ieee80211_sta_req_auth(struct net_device *dev,
3274 struct ieee80211_if_sta *ifsta)
3275{
3276 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3277 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3278
51fb61e7 3279 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3280 return;
3281
d6f2da5b
JS		 3282 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3283 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3284 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3285 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3286 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3287 queue_work(local->hw.workqueue, &ifsta->work);
3288 }
3289}
3290
3291static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3292 const char *ssid, int ssid_len)
3293{
3294 int tmp, hidden_ssid;
3295
48225709
MW		 3296 if (ssid_len == ifsta->ssid_len &&
3297 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3298 return 1;
3299
d6f2da5b 3300 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3301 return 0;
3302
3303 hidden_ssid = 1;
3304 tmp = ssid_len;
3305 while (tmp--) {
3306 if (ssid[tmp] != '\0') {
3307 hidden_ssid = 0;
3308 break;
3309 }
3310 }
3311
3312 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3313 return 1;
3314
3315 if (ssid_len == 1 && ssid[0] == ' ')
3316 return 1;
3317
3318 return 0;
3319}
3320
3321static int ieee80211_sta_config_auth(struct net_device *dev,
3322 struct ieee80211_if_sta *ifsta)
3323{
3324 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3325 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3326 struct ieee80211_sta_bss *bss, *selected = NULL;
3327 int top_rssi = 0, freq;
3328
d6f2da5b
JS		 3329 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3330 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 3331 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3332 ieee80211_sta_reset_auth(dev, ifsta);
3333 return 0;
3334 }
3335
3336 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3337 freq = local->oper_channel->center_freq;
f0706e82
JB		 3338 list_for_each_entry(bss, &local->sta_bss_list, list) {
3339 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3340 continue;
3341
3342 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3343 !!sdata->default_key)
3344 continue;
3345
d6f2da5b
JS		 3346 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3347 bss->freq != freq)
f0706e82
JB		 3348 continue;
3349
d6f2da5b 3350 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3351 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3352 continue;
3353
d6f2da5b 3354 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3355 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3356 continue;
3357
3358 if (!selected || top_rssi < bss->rssi) {
3359 selected = bss;
3360 top_rssi = bss->rssi;
3361 }
3362 }
3363 if (selected)
3364 atomic_inc(&selected->users);
3365 spin_unlock_bh(&local->sta_bss_lock);
3366
3367 if (selected) {
8318d78a 3368 ieee80211_set_freq(local, selected->freq);
d6f2da5b 3369 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3370 ieee80211_sta_set_ssid(dev, selected->ssid,
3371 selected->ssid_len);
3372 ieee80211_sta_set_bssid(dev, selected->bssid);
e2839d8f 3373 ieee80211_sta_def_wmm_params(dev, selected, 0);
f0706e82
JB		 3374 ieee80211_rx_bss_put(dev, selected);
3375 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3376 ieee80211_sta_reset_auth(dev, ifsta);
3377 return 0;
3378 } else {
3379 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3380 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3381 ieee80211_sta_start_scan(dev, NULL, 0);
3382 else
3383 ieee80211_sta_start_scan(dev, ifsta->ssid,
3384 ifsta->ssid_len);
f0706e82
JB		 3385 ifsta->state = IEEE80211_AUTHENTICATE;
3386 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3387 } else
3388 ifsta->state = IEEE80211_DISABLED;
3389 }
f0706e82
JB		 3390 return -1;
3391}
3392
f0706e82
JB		 3393
3394static int ieee80211_sta_create_ibss(struct net_device *dev,
3395 struct ieee80211_if_sta *ifsta)
3396{
3397 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3398 struct ieee80211_sta_bss *bss;
cffdd30d 3399 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3400 struct ieee80211_supported_band *sband;
f0706e82
JB		 3401 u8 bssid[ETH_ALEN], *pos;
3402 int i;
0795af57 3403 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3404
3405#if 0
3406 /* Easier testing, use fixed BSSID. */
3407 memset(bssid, 0xfe, ETH_ALEN);
3408#else
3409 /* Generate random, not broadcast, locally administered BSSID. Mix in
3410 * own MAC address to make sure that devices that do not have proper
3411 * random number generator get different BSSID. */
3412 get_random_bytes(bssid, ETH_ALEN);
3413 for (i = 0; i < ETH_ALEN; i++)
3414 bssid[i] ^= dev->dev_addr[i];
3415 bssid[0] &= ~0x01;
3416 bssid[0] |= 0x02;
3417#endif
3418
0795af57
JP		 3419 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3420 dev->name, print_mac(mac, bssid));
f0706e82 3421
8318d78a
JB		 3422 bss = ieee80211_rx_bss_add(dev, bssid,
3423 local->hw.conf.channel->center_freq,
cffdd30d 3424 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3425 if (!bss)
3426 return -ENOMEM;
3427
8318d78a
JB		 3428 bss->band = local->hw.conf.channel->band;
3429 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3430
3431 if (local->hw.conf.beacon_int == 0)
f709fc69 3432 local->hw.conf.beacon_int = 10000;
f0706e82 3433 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3434 bss->last_update = jiffies;
3435 bss->capability = WLAN_CAPABILITY_IBSS;
3436 if (sdata->default_key) {
3437 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3438 } else
3439 sdata->drop_unencrypted = 0;
8318d78a 3440 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3441 pos = bss->supp_rates;
8318d78a
JB		 3442 for (i = 0; i < sband->n_bitrates; i++) {
3443 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3444 *pos++ = (u8) (rate / 5);
3445 }
3446
3447 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3448}
3449
3450
3451static int ieee80211_sta_find_ibss(struct net_device *dev,
3452 struct ieee80211_if_sta *ifsta)
3453{
3454 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3455 struct ieee80211_sta_bss *bss;
3456 int found = 0;
3457 u8 bssid[ETH_ALEN];
3458 int active_ibss;
0795af57
JP		 3459 DECLARE_MAC_BUF(mac);
3460 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3461
3462 if (ifsta->ssid_len == 0)
3463 return -EINVAL;
3464
3465 active_ibss = ieee80211_sta_active_ibss(dev);
3466#ifdef CONFIG_MAC80211_IBSS_DEBUG
3467 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3468 dev->name, active_ibss);
3469#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3470 spin_lock_bh(&local->sta_bss_lock);
3471 list_for_each_entry(bss, &local->sta_bss_list, list) {
3472 if (ifsta->ssid_len != bss->ssid_len ||
3473 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3474 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3475 continue;
3476#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3477 printk(KERN_DEBUG " bssid=%s found\n",
3478 print_mac(mac, bss->bssid));
f0706e82
JB		 3479#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3480 memcpy(bssid, bss->bssid, ETH_ALEN);
3481 found = 1;
3482 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3483 break;
3484 }
3485 spin_unlock_bh(&local->sta_bss_lock);
3486
3487#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3488 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3489 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3490#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3491 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3492 (bss = ieee80211_rx_bss_get(dev, bssid,
3493 local->hw.conf.channel->center_freq,
cffdd30d 3494 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3495 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3496 " based on configured SSID\n",
0795af57 3497 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3498 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3499 }
3500#ifdef CONFIG_MAC80211_IBSS_DEBUG
3501 printk(KERN_DEBUG " did not try to join ibss\n");
3502#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3503
3504 /* Selected IBSS not found in current scan results - try to scan */
3505 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3506 !ieee80211_sta_active_ibss(dev)) {
3507 mod_timer(&ifsta->timer, jiffies +
3508 IEEE80211_IBSS_MERGE_INTERVAL);
3509 } else if (time_after(jiffies, local->last_scan_completed +
3510 IEEE80211_SCAN_INTERVAL)) {
3511 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3512 "join\n", dev->name);
3513 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3514 ifsta->ssid_len);
3515 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3516 int interval = IEEE80211_SCAN_INTERVAL;
3517
3518 if (time_after(jiffies, ifsta->ibss_join_req +
3519 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3520 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3521 (!(local->oper_channel->flags &
3522 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3523 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3524 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3525 printk(KERN_DEBUG "%s: IBSS not allowed on"
3526 " %d MHz\n", dev->name,
3527 local->hw.conf.channel->center_freq);
f0706e82
JB		 3528 }
3529
3530 /* No IBSS found - decrease scan interval and continue
3531 * scanning. */
3532 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3533 }
3534
3535 ifsta->state = IEEE80211_IBSS_SEARCH;
3536 mod_timer(&ifsta->timer, jiffies + interval);
3537 return 0;
3538 }
3539
3540 return 0;
3541}
3542
3543
3544int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3545{
8318d78a 3546 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3547 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 3548
3549 if (len > IEEE80211_MAX_SSID_LEN)
3550 return -EINVAL;
3551
f0706e82
JB		 3552 ifsta = &sdata->u.sta;
3553
3554 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3555 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3556 memcpy(ifsta->ssid, ssid, len);
3557 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3558 ifsta->ssid_len = len;
3559
d6f2da5b
JS		 3560 if (len)
3561 ifsta->flags |= IEEE80211_STA_SSID_SET;
3562 else
3563 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3564 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3565 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3566 ifsta->ibss_join_req = jiffies;
3567 ifsta->state = IEEE80211_IBSS_SEARCH;
3568 return ieee80211_sta_find_ibss(dev, ifsta);
3569 }
3570 return 0;
3571}
3572
3573
3574int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3575{
3576 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3577 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3578 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3579 *len = ifsta->ssid_len;
3580 return 0;
3581}
3582
3583
3584int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3585{
3586 struct ieee80211_sub_if_data *sdata;
3587 struct ieee80211_if_sta *ifsta;
3588 int res;
3589
3590 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3591 ifsta = &sdata->u.sta;
3592
3593 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3594 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3595 res = ieee80211_if_config(dev);
3596 if (res) {
3597 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3598 "the low-level driver\n", dev->name);
3599 return res;
3600 }
3601 }
3602
d6f2da5b
JS		 3603 if (is_valid_ether_addr(bssid))
3604 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3605 else
d6f2da5b
JS		 3606 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3607
f0706e82
JB		 3608 return 0;
3609}
3610
3611
3612static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3613 struct ieee80211_sub_if_data *sdata,
3614 int powersave)
3615{
3616 struct sk_buff *skb;
3617 struct ieee80211_hdr *nullfunc;
3618 u16 fc;
3619
3620 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3621 if (!skb) {
3622 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3623 "frame\n", sdata->dev->name);
3624 return;
3625 }
3626 skb_reserve(skb, local->hw.extra_tx_headroom);
3627
3628 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3629 memset(nullfunc, 0, 24);
3630 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3631 IEEE80211_FCTL_TODS;
3632 if (powersave)
3633 fc |= IEEE80211_FCTL_PM;
3634 nullfunc->frame_control = cpu_to_le16(fc);
3635 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3636 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3637 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3638
3639 ieee80211_sta_tx(sdata->dev, skb, 0);
3640}
3641
3642
69d3b6f4
JB		 3643static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3644{
3645 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3646 ieee80211_vif_is_mesh(&sdata->vif))
3647 ieee80211_sta_timer((unsigned long)sdata);
3648}
3649
f0706e82
JB		 3650void ieee80211_scan_completed(struct ieee80211_hw *hw)
3651{
3652 struct ieee80211_local *local = hw_to_local(hw);
3653 struct net_device *dev = local->scan_dev;
3654 struct ieee80211_sub_if_data *sdata;
3655 union iwreq_data wrqu;
3656
3657 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3658 memset(&wrqu, 0, sizeof(wrqu));
3659 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3660
ece8eddd
ZY		 3661 if (local->sta_hw_scanning) {
3662 local->sta_hw_scanning = 0;
675ef586
MA		 3663 if (ieee80211_hw_config(local))
3664 printk(KERN_DEBUG "%s: failed to restore operational "
3665 "channel after scan\n", dev->name);
69d3b6f4
JB		 3666 /* Restart STA timer for HW scan case */
3667 rcu_read_lock();
3668 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3669 ieee80211_restart_sta_timer(sdata);
3670 rcu_read_unlock();
3671
ece8eddd
ZY		 3672 goto done;
3673 }
3674
3675 local->sta_sw_scanning = 0;
f0706e82 3676 if (ieee80211_hw_config(local))
4b50e388 3677 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3678 "channel after scan\n", dev->name);
3679
4150c572
JB		 3680
3681 netif_tx_lock_bh(local->mdev);
3682 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3683 local->ops->configure_filter(local_to_hw(local),
3684 FIF_BCN_PRBRESP_PROMISC,
3685 &local->filter_flags,
3686 local->mdev->mc_count,
3687 local->mdev->mc_list);
3688
3689 netif_tx_unlock_bh(local->mdev);
f0706e82 3690
79010420
JB		 3691 rcu_read_lock();
3692 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3693
3694 /* No need to wake the master device. */
3695 if (sdata->dev == local->mdev)
3696 continue;
3697
69d3b6f4
JB		 3698 /* Tell AP we're back */
3699 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3700 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3701 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3702
69d3b6f4 3703 ieee80211_restart_sta_timer(sdata);
f709fc69 3704
f0706e82
JB		 3705 netif_wake_queue(sdata->dev);
3706 }
79010420 3707 rcu_read_unlock();
f0706e82 3708
ece8eddd 3709done:
f0706e82 3710 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3711 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3712 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3713 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3714 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3715 !ieee80211_sta_active_ibss(dev)))
3716 ieee80211_sta_find_ibss(dev, ifsta);
3717 }
3718}
3719EXPORT_SYMBOL(ieee80211_scan_completed);
3720
3721void ieee80211_sta_scan_work(struct work_struct *work)
3722{
3723 struct ieee80211_local *local =
3724 container_of(work, struct ieee80211_local, scan_work.work);
3725 struct net_device *dev = local->scan_dev;
3726 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3727 struct ieee80211_supported_band *sband;
f0706e82
JB		 3728 struct ieee80211_channel *chan;
3729 int skip;
3730 unsigned long next_delay = 0;
3731
ece8eddd 3732 if (!local->sta_sw_scanning)
f0706e82
JB		 3733 return;
3734
3735 switch (local->scan_state) {
3736 case SCAN_SET_CHANNEL:
69d464d5
JB		 3737 /*
3738 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3739 * after we successfully scanned the last channel of the last
3740 * band (and the last band is supported by the hw)
3741 */
8318d78a
JB		 3742 if (local->scan_band < IEEE80211_NUM_BANDS)
3743 sband = local->hw.wiphy->bands[local->scan_band];
3744 else
3745 sband = NULL;
3746
69d464d5
JB		 3747 /*
3748 * If we are at an unsupported band and have more bands
3749 * left to scan, advance to the next supported one.
3750 */
3751 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3752 local->scan_band++;
3753 sband = local->hw.wiphy->bands[local->scan_band];
3754 local->scan_channel_idx = 0;
3755 }
3756
69d464d5
JB		 3757 /* if no more bands/channels left, complete scan */
3758 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3759 ieee80211_scan_completed(local_to_hw(local));
3760 return;
3761 }
8318d78a
JB		 3762 skip = 0;
3763 chan = &sband->channels[local->scan_channel_idx];
3764
3765 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3766 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3767 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3768 skip = 1;
3769
3770 if (!skip) {
f0706e82
JB		 3771 local->scan_channel = chan;
3772 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3773 printk(KERN_DEBUG "%s: failed to set freq to "
3774 "%d MHz for scan\n", dev->name,
3775 chan->center_freq);
f0706e82
JB		 3776 skip = 1;
3777 }
3778 }
3779
69d464d5 3780 /* advance state machine to next channel/band */
f0706e82 3781 local->scan_channel_idx++;
8318d78a 3782 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3783 /*
3784 * scan_band may end up == IEEE80211_NUM_BANDS, but
3785 * we'll catch that case above and complete the scan
3786 * if that is the case.
3787 */
8318d78a
JB		 3788 local->scan_band++;
3789 local->scan_channel_idx = 0;
f0706e82
JB		 3790 }
3791
3792 if (skip)
3793 break;
3794
3795 next_delay = IEEE80211_PROBE_DELAY +
3796 usecs_to_jiffies(local->hw.channel_change_time);
3797 local->scan_state = SCAN_SEND_PROBE;
3798 break;
3799 case SCAN_SEND_PROBE:
8318d78a 3800 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3801 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3802
3803 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3804 break;
3805 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3806 local->scan_ssid_len);
3807 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3808 break;
3809 }
3810
ece8eddd 3811 if (local->sta_sw_scanning)
f0706e82
JB		 3812 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3813 next_delay);
3814}
3815
3816
3817static int ieee80211_sta_start_scan(struct net_device *dev,
3818 u8 *ssid, size_t ssid_len)
3819{
3820 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3821 struct ieee80211_sub_if_data *sdata;
3822
3823 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3824 return -EINVAL;
3825
3826 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3827 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3828 * BSSID: MACAddress
3829 * SSID
3830 * ScanType: ACTIVE, PASSIVE
3831 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3832 * a Probe frame during active scanning
3833 * ChannelList
3834 * MinChannelTime (>= ProbeDelay), in TU
3835 * MaxChannelTime: (>= MinChannelTime), in TU
3836 */
3837
3838 /* MLME-SCAN.confirm
3839 * BSSDescriptionSet
3840 * ResultCode: SUCCESS, INVALID_PARAMETERS
3841 */
3842
ece8eddd 3843 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3844 if (local->scan_dev == dev)
3845 return 0;
3846 return -EBUSY;
3847 }
3848
3849 if (local->ops->hw_scan) {
3850 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3851 ssid, ssid_len);
f0706e82 3852 if (!rc) {
ece8eddd 3853 local->sta_hw_scanning = 1;
f0706e82
JB		 3854 local->scan_dev = dev;
3855 }
3856 return rc;
3857 }
3858
ece8eddd 3859 local->sta_sw_scanning = 1;
f0706e82 3860
79010420
JB		 3861 rcu_read_lock();
3862 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3863
3864 /* Don't stop the master interface, otherwise we can't transmit
3865 * probes! */
3866 if (sdata->dev == local->mdev)
3867 continue;
3868
f0706e82 3869 netif_stop_queue(sdata->dev);
51fb61e7 3870 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3871 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3872 ieee80211_send_nullfunc(local, sdata, 1);
3873 }
79010420 3874 rcu_read_unlock();
f0706e82
JB		 3875
3876 if (ssid) {
3877 local->scan_ssid_len = ssid_len;
3878 memcpy(local->scan_ssid, ssid, ssid_len);
3879 } else
3880 local->scan_ssid_len = 0;
3881 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3882 local->scan_channel_idx = 0;
8318d78a 3883 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 3884 local->scan_dev = dev;
3885
4150c572
JB		 3886 netif_tx_lock_bh(local->mdev);
3887 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3888 local->ops->configure_filter(local_to_hw(local),
3889 FIF_BCN_PRBRESP_PROMISC,
3890 &local->filter_flags,
3891 local->mdev->mc_count,
3892 local->mdev->mc_list);
3893 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3894
3895 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3896 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3897 IEEE80211_CHANNEL_TIME);
3898
3899 return 0;
3900}
3901
3902
3903int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3904{
3905 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3906 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3907 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3908
51fb61e7 3909 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3910 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3911
ece8eddd 3912 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3913 if (local->scan_dev == dev)
3914 return 0;
3915 return -EBUSY;
3916 }
3917
a0af5f14
HS		 3918 ifsta->scan_ssid_len = ssid_len;
3919 if (ssid_len)
3920 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3921 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3922 queue_work(local->hw.workqueue, &ifsta->work);
3923 return 0;
3924}
3925
3926static char *
3927ieee80211_sta_scan_result(struct net_device *dev,
3928 struct ieee80211_sta_bss *bss,
3929 char *current_ev, char *end_buf)
3930{
3931 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3932 struct iw_event iwe;
3933
3934 if (time_after(jiffies,
3935 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3936 return current_ev;
3937
f0706e82
JB		 3938 memset(&iwe, 0, sizeof(iwe));
3939 iwe.cmd = SIOCGIWAP;
3940 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3941 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3942 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3943 IW_EV_ADDR_LEN);
3944
3945 memset(&iwe, 0, sizeof(iwe));
3946 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 3947 if (bss_mesh_cfg(bss)) {
3948 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69
LCC		 3949 iwe.u.data.flags = 1;
3950 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
902acc78 3951 bss_mesh_id(bss));
f709fc69
LCC		 3952 } else {
3953 iwe.u.data.length = bss->ssid_len;
3954 iwe.u.data.flags = 1;
3955 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3956 bss->ssid);
3957 }
f0706e82 3958
1d1b5359
LCC		 3959 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3960 || bss_mesh_cfg(bss)) {
f0706e82
JB		 3961 memset(&iwe, 0, sizeof(iwe));
3962 iwe.cmd = SIOCGIWMODE;
902acc78 3963 if (bss_mesh_cfg(bss))
f709fc69
LCC		 3964 iwe.u.mode = IW_MODE_MESH;
3965 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 3966 iwe.u.mode = IW_MODE_MASTER;
3967 else
3968 iwe.u.mode = IW_MODE_ADHOC;
3969 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3970 IW_EV_UINT_LEN);
3971 }
3972
3973 memset(&iwe, 0, sizeof(iwe));
3974 iwe.cmd = SIOCGIWFREQ;
8318d78a
JB		 3975 iwe.u.freq.m = bss->freq;
3976 iwe.u.freq.e = 6;
f0706e82
JB		 3977 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3978 IW_EV_FREQ_LEN);
8318d78a
JB		 3979
3980 memset(&iwe, 0, sizeof(iwe));
3981 iwe.cmd = SIOCGIWFREQ;
3982 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3983 iwe.u.freq.e = 0;
f0706e82
JB		 3984 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3985 IW_EV_FREQ_LEN);
3986
3987 memset(&iwe, 0, sizeof(iwe));
3988 iwe.cmd = IWEVQUAL;
3989 iwe.u.qual.qual = bss->signal;
3990 iwe.u.qual.level = bss->rssi;
3991 iwe.u.qual.noise = bss->noise;
3992 iwe.u.qual.updated = local->wstats_flags;
3993 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3994 IW_EV_QUAL_LEN);
3995
3996 memset(&iwe, 0, sizeof(iwe));
3997 iwe.cmd = SIOCGIWENCODE;
3998 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
3999 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4000 else
4001 iwe.u.data.flags = IW_ENCODE_DISABLED;
4002 iwe.u.data.length = 0;
4003 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4004
4005 if (bss && bss->wpa_ie) {
4006 memset(&iwe, 0, sizeof(iwe));
4007 iwe.cmd = IWEVGENIE;
4008 iwe.u.data.length = bss->wpa_ie_len;
4009 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4010 bss->wpa_ie);
4011 }
4012
4013 if (bss && bss->rsn_ie) {
4014 memset(&iwe, 0, sizeof(iwe));
4015 iwe.cmd = IWEVGENIE;
4016 iwe.u.data.length = bss->rsn_ie_len;
4017 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4018 bss->rsn_ie);
4019 }
4020
4021 if (bss && bss->supp_rates_len > 0) {
4022 /* display all supported rates in readable format */
4023 char *p = current_ev + IW_EV_LCP_LEN;
4024 int i;
4025
4026 memset(&iwe, 0, sizeof(iwe));
4027 iwe.cmd = SIOCGIWRATE;
4028 /* Those two flags are ignored... */
4029 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4030
4031 for (i = 0; i < bss->supp_rates_len; i++) {
4032 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4033 0x7f) * 500000);
4034 p = iwe_stream_add_value(current_ev, p,
4035 end_buf, &iwe, IW_EV_PARAM_LEN);
4036 }
4037 current_ev = p;
4038 }
4039
4040 if (bss) {
4041 char *buf;
4042 buf = kmalloc(30, GFP_ATOMIC);
4043 if (buf) {
4044 memset(&iwe, 0, sizeof(iwe));
4045 iwe.cmd = IWEVCUSTOM;
4046 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4047 iwe.u.data.length = strlen(buf);
4048 current_ev = iwe_stream_add_point(current_ev, end_buf,
4049 &iwe, buf);
4050 kfree(buf);
4051 }
4052 }
4053
902acc78 4054 if (bss_mesh_cfg(bss)) {
f709fc69 4055 char *buf;
902acc78 4056 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 4057 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 4058 if (buf) {
4059 memset(&iwe, 0, sizeof(iwe));
4060 iwe.cmd = IWEVCUSTOM;
4f5d4c4d
LCC		 4061 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4062 iwe.u.data.length = strlen(buf);
4063 current_ev = iwe_stream_add_point(current_ev, end_buf,
4064 &iwe, buf);
4065 sprintf(buf, "Path Selection Protocol ID: "
4066 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4067 cfg[4]);
4068 iwe.u.data.length = strlen(buf);
4069 current_ev = iwe_stream_add_point(current_ev, end_buf,
4070 &iwe, buf);
4071 sprintf(buf, "Path Selection Metric ID: "
4072 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4073 cfg[8]);
4074 iwe.u.data.length = strlen(buf);
4075 current_ev = iwe_stream_add_point(current_ev, end_buf,
4076 &iwe, buf);
4077 sprintf(buf, "Congestion Control Mode ID: "
4078 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4079 cfg[11], cfg[12]);
4080 iwe.u.data.length = strlen(buf);
4081 current_ev = iwe_stream_add_point(current_ev, end_buf,
4082 &iwe, buf);
4083 sprintf(buf, "Channel Precedence: "
4084 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4085 cfg[15], cfg[16]);
f709fc69
LCC		 4086 iwe.u.data.length = strlen(buf);
4087 current_ev = iwe_stream_add_point(current_ev, end_buf,
4088 &iwe, buf);
4089 kfree(buf);
4090 }
4091 }
4092
f0706e82
JB		 4093 return current_ev;
4094}
4095
4096
4097int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4098{
4099 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4100 char *current_ev = buf;
4101 char *end_buf = buf + len;
4102 struct ieee80211_sta_bss *bss;
4103
4104 spin_lock_bh(&local->sta_bss_lock);
4105 list_for_each_entry(bss, &local->sta_bss_list, list) {
4106 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4107 spin_unlock_bh(&local->sta_bss_lock);
4108 return -E2BIG;
4109 }
4110 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4111 end_buf);
4112 }
4113 spin_unlock_bh(&local->sta_bss_lock);
4114 return current_ev - buf;
4115}
4116
4117
4118int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4119{
4120 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4121 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4122 kfree(ifsta->extra_ie);
4123 if (len == 0) {
4124 ifsta->extra_ie = NULL;
4125 ifsta->extra_ie_len = 0;
4126 return 0;
4127 }
4128 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4129 if (!ifsta->extra_ie) {
4130 ifsta->extra_ie_len = 0;
4131 return -ENOMEM;
4132 }
4133 memcpy(ifsta->extra_ie, ie, len);
4134 ifsta->extra_ie_len = len;
4135 return 0;
4136}
4137
4138
4139struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4140 struct sk_buff *skb, u8 *bssid,
4141 u8 *addr)
4142{
4143 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4144 struct sta_info *sta;
91fa558b 4145 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 4146 DECLARE_MAC_BUF(mac);
f0706e82
JB		 4147
4148 /* TODO: Could consider removing the least recently used entry and
4149 * allow new one to be added. */
4150 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4151 if (net_ratelimit()) {
4152 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 4153 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 4154 }
4155 return NULL;
4156 }
4157
0795af57 4158 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 4159 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82 4160
73651ee6
JB		 4161 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4162 if (!sta)
f0706e82
JB		 4163 return NULL;
4164
238814fd
JB		 4165 sta->flags |= WLAN_STA_AUTHORIZED;
4166
8318d78a
JB		 4167 sta->supp_rates[local->hw.conf.channel->band] =
4168 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
f0706e82
JB		 4169
4170 rate_control_rate_init(sta, local);
4171
93e5deb1 4172 if (sta_info_insert(sta))
73651ee6 4173 return NULL;
73651ee6 4174
d0709a65 4175 return sta;
f0706e82
JB		 4176}
4177
4178
4179int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4180{
4181 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4182 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4183
4184 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4185 dev->name, reason);
4186
51fb61e7
JB		 4187 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4188 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4189 return -EINVAL;
4190
4191 ieee80211_send_deauth(dev, ifsta, reason);
4192 ieee80211_set_disassoc(dev, ifsta, 1);
4193 return 0;
4194}
4195
4196
4197int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4198{
4199 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4200 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4201
4202 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4203 dev->name, reason);
4204
51fb61e7 4205 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4206 return -EINVAL;
4207
d6f2da5b 4208 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4209 return -1;
4210
4211 ieee80211_send_disassoc(dev, ifsta, reason);
4212 ieee80211_set_disassoc(dev, ifsta, 0);
4213 return 0;
4214}
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