]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/mac80211/ieee80211_sta.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
iwlwifi: eliminate conf_ht
[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 361 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
d43c7b37 362 bool use_short_preamble = (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
d43c7b37 378 if (use_short_preamble != 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,
d43c7b37 383 use_short_preamble ? "short" : "long",
0795af57 384 print_mac(mac, ifsta->bssid));
7e9ed188 385 }
d43c7b37 386 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 387 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 388 }
d9430a32 389
471b3efd 390 return changed;
5628221c
DD		 391}
392
c7153508
RR		 393int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
394 struct ieee80211_ht_info *ht_info)
395{
396
397 if (ht_info == NULL)
398 return -EINVAL;
399
400 memset(ht_info, 0, sizeof(*ht_info));
401
402 if (ht_cap_ie) {
403 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
404
405 ht_info->ht_supported = 1;
406 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
407 ht_info->ampdu_factor =
408 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
409 ht_info->ampdu_density =
410 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
411 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
412 } else
413 ht_info->ht_supported = 0;
414
415 return 0;
416}
417
418int ieee80211_ht_addt_info_ie_to_ht_bss_info(
419 struct ieee80211_ht_addt_info *ht_add_info_ie,
420 struct ieee80211_ht_bss_info *bss_info)
421{
422 if (bss_info == NULL)
423 return -EINVAL;
424
425 memset(bss_info, 0, sizeof(*bss_info));
426
427 if (ht_add_info_ie) {
428 u16 op_mode;
429 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
430
431 bss_info->primary_channel = ht_add_info_ie->control_chan;
432 bss_info->bss_cap = ht_add_info_ie->ht_param;
433 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
434 }
435
436 return 0;
437}
5628221c 438
f0706e82
JB		 439static void ieee80211_sta_send_associnfo(struct net_device *dev,
440 struct ieee80211_if_sta *ifsta)
441{
442 char *buf;
443 size_t len;
444 int i;
445 union iwreq_data wrqu;
446
447 if (!ifsta->assocreq_ies && !ifsta->assocresp_ies)
448 return;
449
450 buf = kmalloc(50 + 2 * (ifsta->assocreq_ies_len +
0ec0b7ac 451 ifsta->assocresp_ies_len), GFP_KERNEL);
f0706e82
JB		 452 if (!buf)
453 return;
454
455 len = sprintf(buf, "ASSOCINFO(");
456 if (ifsta->assocreq_ies) {
457 len += sprintf(buf + len, "ReqIEs=");
458 for (i = 0; i < ifsta->assocreq_ies_len; i++) {
459 len += sprintf(buf + len, "%02x",
460 ifsta->assocreq_ies[i]);
461 }
462 }
463 if (ifsta->assocresp_ies) {
464 if (ifsta->assocreq_ies)
465 len += sprintf(buf + len, " ");
466 len += sprintf(buf + len, "RespIEs=");
467 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
468 len += sprintf(buf + len, "%02x",
469 ifsta->assocresp_ies[i]);
470 }
471 }
472 len += sprintf(buf + len, ")");
473
474 if (len > IW_CUSTOM_MAX) {
475 len = sprintf(buf, "ASSOCRESPIE=");
476 for (i = 0; i < ifsta->assocresp_ies_len; i++) {
477 len += sprintf(buf + len, "%02x",
478 ifsta->assocresp_ies[i]);
479 }
480 }
481
482 memset(&wrqu, 0, sizeof(wrqu));
483 wrqu.data.length = len;
484 wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
485
486 kfree(buf);
487}
488
489
490static void ieee80211_set_associated(struct net_device *dev,
d6f2da5b 491 struct ieee80211_if_sta *ifsta,
47f0c502 492 bool assoc)
f0706e82 493{
471b3efd
JB		 494 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
495 struct ieee80211_local *local = sdata->local;
38668c05 496 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
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,
38668c05 509 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
38668c05
TW		 518 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
519 changed |= BSS_CHANGED_HT;
520 sdata->bss_conf.assoc_ht = 1;
521 sdata->bss_conf.ht_conf = &conf->ht_conf;
522 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
523 }
524
f0706e82 525 netif_carrier_on(dev);
d6f2da5b 526 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 527 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
528 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
529 ieee80211_sta_send_associnfo(dev, ifsta);
530 } else {
85249e5f 531 ieee80211_sta_tear_down_BA_sessions(dev, ifsta->bssid);
d6f2da5b 532 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
f0706e82 533 netif_carrier_off(dev);
d9430a32 534 ieee80211_reset_erp_info(dev);
38668c05
TW		 535
536 sdata->bss_conf.assoc_ht = 0;
537 sdata->bss_conf.ht_conf = NULL;
538 sdata->bss_conf.ht_bss_conf = NULL;
539
f0706e82
JB		 540 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
541 }
542 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
543 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
544 ifsta->last_probe = jiffies;
47f0c502 545 ieee80211_led_assoc(local, assoc);
471b3efd 546
b2205256 547 sdata->bss_conf.assoc = assoc;
471b3efd 548 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 549}
550
551static void ieee80211_set_disassoc(struct net_device *dev,
552 struct ieee80211_if_sta *ifsta, int deauth)
553{
554 if (deauth)
555 ifsta->auth_tries = 0;
556 ifsta->assoc_tries = 0;
557 ieee80211_set_associated(dev, ifsta, 0);
558}
559
ee385855
LCC		 560void ieee80211_sta_tx(struct net_device *dev, struct sk_buff *skb,
561 int encrypt)
f0706e82
JB		 562{
563 struct ieee80211_sub_if_data *sdata;
564 struct ieee80211_tx_packet_data *pkt_data;
565
566 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
567 skb->dev = sdata->local->mdev;
568 skb_set_mac_header(skb, 0);
569 skb_set_network_header(skb, 0);
570 skb_set_transport_header(skb, 0);
571
572 pkt_data = (struct ieee80211_tx_packet_data *) skb->cb;
573 memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data));
574 pkt_data->ifindex = sdata->dev->ifindex;
e8bf9649
JS		 575 if (!encrypt)
576 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
f0706e82
JB		 577
578 dev_queue_xmit(skb);
579}
580
581
582static void ieee80211_send_auth(struct net_device *dev,
583 struct ieee80211_if_sta *ifsta,
584 int transaction, u8 *extra, size_t extra_len,
585 int encrypt)
586{
587 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
588 struct sk_buff *skb;
589 struct ieee80211_mgmt *mgmt;
590
591 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
592 sizeof(*mgmt) + 6 + extra_len);
593 if (!skb) {
594 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
595 "frame\n", dev->name);
596 return;
597 }
598 skb_reserve(skb, local->hw.extra_tx_headroom);
599
600 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
601 memset(mgmt, 0, 24 + 6);
602 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
603 IEEE80211_STYPE_AUTH);
604 if (encrypt)
605 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
606 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
607 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
608 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
609 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
610 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
611 ifsta->auth_transaction = transaction + 1;
612 mgmt->u.auth.status_code = cpu_to_le16(0);
613 if (extra)
614 memcpy(skb_put(skb, extra_len), extra, extra_len);
615
616 ieee80211_sta_tx(dev, skb, encrypt);
617}
618
619
620static void ieee80211_authenticate(struct net_device *dev,
621 struct ieee80211_if_sta *ifsta)
622{
0795af57
JP		 623 DECLARE_MAC_BUF(mac);
624
f0706e82
JB		 625 ifsta->auth_tries++;
626 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 627 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 628 " timed out\n",
0795af57 629 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 630 ifsta->state = IEEE80211_DISABLED;
631 return;
632 }
633
634 ifsta->state = IEEE80211_AUTHENTICATE;
0795af57
JP		 635 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
636 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 637
638 ieee80211_send_auth(dev, ifsta, 1, NULL, 0, 0);
639
640 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
641}
642
643
644static void ieee80211_send_assoc(struct net_device *dev,
645 struct ieee80211_if_sta *ifsta)
646{
647 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82
JB		 648 struct sk_buff *skb;
649 struct ieee80211_mgmt *mgmt;
650 u8 *pos, *ies;
651 int i, len;
652 u16 capab;
653 struct ieee80211_sta_bss *bss;
654 int wmm = 0;
8318d78a 655 struct ieee80211_supported_band *sband;
f0706e82
JB		 656
657 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
658 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
659 ifsta->ssid_len);
660 if (!skb) {
661 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
662 "frame\n", dev->name);
663 return;
664 }
665 skb_reserve(skb, local->hw.extra_tx_headroom);
666
8318d78a
JB		 667 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
668
f0706e82 669 capab = ifsta->capab;
8318d78a
JB		 670
671 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
672 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
673 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
674 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
675 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 676 }
8318d78a
JB		 677
678 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
679 local->hw.conf.channel->center_freq,
cffdd30d 680 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 681 if (bss) {
682 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
683 capab |= WLAN_CAPABILITY_PRIVACY;
684 if (bss->wmm_ie) {
685 wmm = 1;
686 }
687 ieee80211_rx_bss_put(dev, bss);
688 }
689
690 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
691 memset(mgmt, 0, 24);
692 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
693 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
694 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
695
d6f2da5b 696 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82
JB		 697 skb_put(skb, 10);
698 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
699 IEEE80211_STYPE_REASSOC_REQ);
700 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
701 mgmt->u.reassoc_req.listen_interval = cpu_to_le16(1);
702 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
703 ETH_ALEN);
704 } else {
705 skb_put(skb, 4);
706 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
707 IEEE80211_STYPE_ASSOC_REQ);
708 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
709 mgmt->u.assoc_req.listen_interval = cpu_to_le16(1);
710 }
711
712 /* SSID */
713 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
714 *pos++ = WLAN_EID_SSID;
715 *pos++ = ifsta->ssid_len;
716 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
717
8318d78a 718 len = sband->n_bitrates;
f0706e82
JB		 719 if (len > 8)
720 len = 8;
721 pos = skb_put(skb, len + 2);
722 *pos++ = WLAN_EID_SUPP_RATES;
723 *pos++ = len;
724 for (i = 0; i < len; i++) {
8318d78a 725 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 726 *pos++ = (u8) (rate / 5);
727 }
728
8318d78a
JB		 729 if (sband->n_bitrates > len) {
730 pos = skb_put(skb, sband->n_bitrates - len + 2);
f0706e82 731 *pos++ = WLAN_EID_EXT_SUPP_RATES;
8318d78a
JB		 732 *pos++ = sband->n_bitrates - len;
733 for (i = len; i < sband->n_bitrates; i++) {
734 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 735 *pos++ = (u8) (rate / 5);
736 }
737 }
738
739 if (ifsta->extra_ie) {
740 pos = skb_put(skb, ifsta->extra_ie_len);
741 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
742 }
743
d6f2da5b 744 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 745 pos = skb_put(skb, 9);
746 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
747 *pos++ = 7; /* len */
748 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
749 *pos++ = 0x50;
750 *pos++ = 0xf2;
751 *pos++ = 2; /* WME */
752 *pos++ = 0; /* WME info */
753 *pos++ = 1; /* WME ver */
754 *pos++ = 0;
755 }
c7153508 756 /* wmm support is a must to HT */
8318d78a
JB		 757 if (wmm && sband->ht_info.ht_supported) {
758 __le16 tmp = cpu_to_le16(sband->ht_info.cap);
c7153508
RR		 759 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
760 *pos++ = WLAN_EID_HT_CAPABILITY;
761 *pos++ = sizeof(struct ieee80211_ht_cap);
762 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
763 memcpy(pos, &tmp, sizeof(u16));
764 pos += sizeof(u16);
8318d78a
JB		 765 /* TODO: needs a define here for << 2 */
766 *pos++ = sband->ht_info.ampdu_factor |
767 (sband->ht_info.ampdu_density << 2);
768 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 769 }
f0706e82
JB		 770
771 kfree(ifsta->assocreq_ies);
772 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 773 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 774 if (ifsta->assocreq_ies)
775 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
776
777 ieee80211_sta_tx(dev, skb, 0);
778}
779
780
781static void ieee80211_send_deauth(struct net_device *dev,
782 struct ieee80211_if_sta *ifsta, u16 reason)
783{
784 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
785 struct sk_buff *skb;
786 struct ieee80211_mgmt *mgmt;
787
788 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
789 if (!skb) {
790 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
791 "frame\n", dev->name);
792 return;
793 }
794 skb_reserve(skb, local->hw.extra_tx_headroom);
795
796 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
797 memset(mgmt, 0, 24);
798 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
799 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
800 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
801 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
802 IEEE80211_STYPE_DEAUTH);
803 skb_put(skb, 2);
804 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
805
806 ieee80211_sta_tx(dev, skb, 0);
807}
808
809
810static void ieee80211_send_disassoc(struct net_device *dev,
811 struct ieee80211_if_sta *ifsta, u16 reason)
812{
813 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
814 struct sk_buff *skb;
815 struct ieee80211_mgmt *mgmt;
816
817 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
818 if (!skb) {
819 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
820 "frame\n", dev->name);
821 return;
822 }
823 skb_reserve(skb, local->hw.extra_tx_headroom);
824
825 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
826 memset(mgmt, 0, 24);
827 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
828 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
829 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
830 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
831 IEEE80211_STYPE_DISASSOC);
832 skb_put(skb, 2);
833 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
834
835 ieee80211_sta_tx(dev, skb, 0);
836}
837
838
839static int ieee80211_privacy_mismatch(struct net_device *dev,
840 struct ieee80211_if_sta *ifsta)
841{
65c107ab 842 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f0706e82 843 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 844 int bss_privacy;
845 int wep_privacy;
846 int privacy_invoked;
f0706e82 847
5b98b1f7 848 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 849 return 0;
850
8318d78a
JB		 851 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
852 local->hw.conf.channel->center_freq,
cffdd30d 853 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 854 if (!bss)
855 return 0;
856
5b98b1f7
JB		 857 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
858 wep_privacy = !!ieee80211_sta_wep_configured(dev);
859 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82
JB		 860
861 ieee80211_rx_bss_put(dev, bss);
862
5b98b1f7
JB		 863 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
864 return 0;
865
866 return 1;
f0706e82
JB		 867}
868
869
870static void ieee80211_associate(struct net_device *dev,
871 struct ieee80211_if_sta *ifsta)
872{
0795af57
JP		 873 DECLARE_MAC_BUF(mac);
874
f0706e82
JB		 875 ifsta->assoc_tries++;
876 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 877 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 878 " timed out\n",
0795af57 879 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 880 ifsta->state = IEEE80211_DISABLED;
881 return;
882 }
883
884 ifsta->state = IEEE80211_ASSOCIATE;
0795af57
JP		 885 printk(KERN_DEBUG "%s: associate with AP %s\n",
886 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 887 if (ieee80211_privacy_mismatch(dev, ifsta)) {
888 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
889 "mixed-cell disabled - abort association\n", dev->name);
890 ifsta->state = IEEE80211_DISABLED;
891 return;
892 }
893
894 ieee80211_send_assoc(dev, ifsta);
895
896 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
897}
898
899
900static void ieee80211_associated(struct net_device *dev,
901 struct ieee80211_if_sta *ifsta)
902{
903 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
904 struct sta_info *sta;
905 int disassoc;
0795af57 906 DECLARE_MAC_BUF(mac);
f0706e82
JB		 907
908 /* TODO: start monitoring current AP signal quality and number of
909 * missed beacons. Scan other channels every now and then and search
910 * for better APs. */
911 /* TODO: remove expired BSSes */
912
913 ifsta->state = IEEE80211_ASSOCIATED;
914
d0709a65
JB		 915 rcu_read_lock();
916
f0706e82
JB		 917 sta = sta_info_get(local, ifsta->bssid);
918 if (!sta) {
0795af57
JP		 919 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
920 dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 921 disassoc = 1;
922 } else {
923 disassoc = 0;
924 if (time_after(jiffies,
925 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 926 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 927 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 928 "current AP %s - assume out of "
f0706e82 929 "range\n",
0795af57 930 dev->name, print_mac(mac, ifsta->bssid));
f0706e82 931 disassoc = 1;
d0709a65 932 sta_info_unlink(&sta);
d6f2da5b 933 } else
f0706e82
JB		 934 ieee80211_send_probe_req(dev, ifsta->bssid,
935 local->scan_ssid,
936 local->scan_ssid_len);
d6f2da5b 937 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 938 } else {
d6f2da5b 939 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 940 if (time_after(jiffies, ifsta->last_probe +
941 IEEE80211_PROBE_INTERVAL)) {
942 ifsta->last_probe = jiffies;
943 ieee80211_send_probe_req(dev, ifsta->bssid,
944 ifsta->ssid,
945 ifsta->ssid_len);
946 }
947 }
f0706e82 948 }
d0709a65
JB		 949
950 rcu_read_unlock();
951
952 if (disassoc && sta) {
d0709a65
JB		 953 rtnl_lock();
954 sta_info_destroy(sta);
955 rtnl_unlock();
956 }
957
f0706e82 958 if (disassoc) {
2d192d95
MW		 959 ifsta->state = IEEE80211_DISABLED;
960 ieee80211_set_associated(dev, ifsta, 0);
f0706e82
JB		 961 } else {
962 mod_timer(&ifsta->timer, jiffies +
963 IEEE80211_MONITORING_INTERVAL);
964 }
965}
966
967
968static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
969 u8 *ssid, size_t ssid_len)
970{
971 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
8318d78a 972 struct ieee80211_supported_band *sband;
f0706e82
JB		 973 struct sk_buff *skb;
974 struct ieee80211_mgmt *mgmt;
975 u8 *pos, *supp_rates, *esupp_rates = NULL;
976 int i;
977
978 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
979 if (!skb) {
980 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
981 "request\n", dev->name);
982 return;
983 }
984 skb_reserve(skb, local->hw.extra_tx_headroom);
985
986 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
987 memset(mgmt, 0, 24);
988 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
989 IEEE80211_STYPE_PROBE_REQ);
990 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
991 if (dst) {
992 memcpy(mgmt->da, dst, ETH_ALEN);
993 memcpy(mgmt->bssid, dst, ETH_ALEN);
994 } else {
995 memset(mgmt->da, 0xff, ETH_ALEN);
996 memset(mgmt->bssid, 0xff, ETH_ALEN);
997 }
998 pos = skb_put(skb, 2 + ssid_len);
999 *pos++ = WLAN_EID_SSID;
1000 *pos++ = ssid_len;
1001 memcpy(pos, ssid, ssid_len);
1002
1003 supp_rates = skb_put(skb, 2);
1004 supp_rates[0] = WLAN_EID_SUPP_RATES;
1005 supp_rates[1] = 0;
8318d78a
JB		 1006 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1007
1008 for (i = 0; i < sband->n_bitrates; i++) {
1009 struct ieee80211_rate *rate = &sband->bitrates[i];
f0706e82
JB		 1010 if (esupp_rates) {
1011 pos = skb_put(skb, 1);
1012 esupp_rates[1]++;
1013 } else if (supp_rates[1] == 8) {
1014 esupp_rates = skb_put(skb, 3);
1015 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
1016 esupp_rates[1] = 1;
1017 pos = &esupp_rates[2];
1018 } else {
1019 pos = skb_put(skb, 1);
1020 supp_rates[1]++;
1021 }
8318d78a 1022 *pos = rate->bitrate / 5;
f0706e82
JB		 1023 }
1024
1025 ieee80211_sta_tx(dev, skb, 0);
1026}
1027
1028
1029static int ieee80211_sta_wep_configured(struct net_device *dev)
1030{
1031 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032 if (!sdata || !sdata->default_key ||
8f20fc24 1033 sdata->default_key->conf.alg != ALG_WEP)
f0706e82
JB		 1034 return 0;
1035 return 1;
1036}
1037
1038
1039static void ieee80211_auth_completed(struct net_device *dev,
1040 struct ieee80211_if_sta *ifsta)
1041{
1042 printk(KERN_DEBUG "%s: authenticated\n", dev->name);
d6f2da5b 1043 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1044 ieee80211_associate(dev, ifsta);
1045}
1046
1047
1048static void ieee80211_auth_challenge(struct net_device *dev,
1049 struct ieee80211_if_sta *ifsta,
1050 struct ieee80211_mgmt *mgmt,
1051 size_t len)
1052{
1053 u8 *pos;
1054 struct ieee802_11_elems elems;
1055
1056 printk(KERN_DEBUG "%s: replying to auth challenge\n", dev->name);
1057 pos = mgmt->u.auth.variable;
67a4cce4 1058 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1059 if (!elems.challenge) {
1060 printk(KERN_DEBUG "%s: no challenge IE in shared key auth "
1061 "frame\n", dev->name);
1062 return;
1063 }
1064 ieee80211_send_auth(dev, ifsta, 3, elems.challenge - 2,
1065 elems.challenge_len + 2, 1);
1066}
1067
9f985b0e
RR		 1068static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
1069 u8 dialog_token, u16 status, u16 policy,
1070 u16 buf_size, u16 timeout)
1071{
1072 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1073 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1074 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1075 struct sk_buff *skb;
1076 struct ieee80211_mgmt *mgmt;
1077 u16 capab;
1078
07db2183
RR		 1079 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1080 sizeof(mgmt->u.action.u.addba_resp));
9f985b0e
RR		 1081 if (!skb) {
1082 printk(KERN_DEBUG "%s: failed to allocate buffer "
1083 "for addba resp frame\n", dev->name);
1084 return;
1085 }
1086
1087 skb_reserve(skb, local->hw.extra_tx_headroom);
1088 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1089 memset(mgmt, 0, 24);
1090 memcpy(mgmt->da, da, ETH_ALEN);
1091 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1092 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
9f985b0e
RR		 1093 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1094 else
1095 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1096 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1097 IEEE80211_STYPE_ACTION);
1098
1099 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1100 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1101 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1102 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1103
1104 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1105 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1106 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1107
1108 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1109 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1110 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1111
1112 ieee80211_sta_tx(dev, skb, 0);
1113
1114 return;
1115}
1116
eadc8d9e
RR		 1117void ieee80211_send_addba_request(struct net_device *dev, const u8 *da,
1118 u16 tid, u8 dialog_token, u16 start_seq_num,
1119 u16 agg_size, u16 timeout)
1120{
1121 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1122 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1123 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1124 struct sk_buff *skb;
1125 struct ieee80211_mgmt *mgmt;
1126 u16 capab;
1127
1128 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1129 sizeof(mgmt->u.action.u.addba_req));
1130
1131
1132 if (!skb) {
1133 printk(KERN_ERR "%s: failed to allocate buffer "
1134 "for addba request frame\n", dev->name);
1135 return;
1136 }
1137 skb_reserve(skb, local->hw.extra_tx_headroom);
1138 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1139 memset(mgmt, 0, 24);
1140 memcpy(mgmt->da, da, ETH_ALEN);
1141 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1142 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
1143 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1144 else
1145 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1146
1147 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1148 IEEE80211_STYPE_ACTION);
1149
1150 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1151
1152 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1153 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1154
1155 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1156 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1157 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1158 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1159
1160 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1161
1162 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1163 mgmt->u.action.u.addba_req.start_seq_num =
1164 cpu_to_le16(start_seq_num << 4);
1165
1166 ieee80211_sta_tx(dev, skb, 0);
1167}
1168
9f985b0e
RR		 1169static void ieee80211_sta_process_addba_request(struct net_device *dev,
1170 struct ieee80211_mgmt *mgmt,
1171 size_t len)
1172{
1173 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
07db2183
RR		 1174 struct ieee80211_hw *hw = &local->hw;
1175 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1176 struct sta_info *sta;
07db2183
RR		 1177 struct tid_ampdu_rx *tid_agg_rx;
1178 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1179 u8 dialog_token;
07db2183
RR		 1180 int ret = -EOPNOTSUPP;
1181 DECLARE_MAC_BUF(mac);
9f985b0e 1182
d0709a65
JB		 1183 rcu_read_lock();
1184
9f985b0e 1185 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1186 if (!sta) {
1187 rcu_read_unlock();
9f985b0e 1188 return;
d0709a65 1189 }
9f985b0e
RR		 1190
1191 /* extract session parameters from addba request frame */
1192 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1193 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1194 start_seq_num =
1195 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1196
1197 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1198 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1199 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1200 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1201
9f985b0e
RR		 1202 status = WLAN_STATUS_REQUEST_DECLINED;
1203
07db2183
RR		 1204 /* sanity check for incoming parameters:
1205 * check if configuration can support the BA policy
1206 * and if buffer size does not exceeds max value */
1207 if (((ba_policy != 1)
1208 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1209 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1210 status = WLAN_STATUS_INVALID_QOS_PARAM;
1211#ifdef CONFIG_MAC80211_HT_DEBUG
1212 if (net_ratelimit())
7b9d44cd 1213 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1214 "%s on tid %u. policy %d, buffer size %d\n",
1215 print_mac(mac, mgmt->sa), tid, ba_policy,
1216 buf_size);
1217#endif /* CONFIG_MAC80211_HT_DEBUG */
1218 goto end_no_lock;
1219 }
1220 /* determine default buffer size */
1221 if (buf_size == 0) {
8318d78a
JB		 1222 struct ieee80211_supported_band *sband;
1223
1224 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1225 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1226 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1227 }
1228
07db2183
RR		 1229
1230 /* examine state machine */
1231 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
1232
cee24a3e 1233 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1234#ifdef CONFIG_MAC80211_HT_DEBUG
1235 if (net_ratelimit())
7b9d44cd 1236 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1237 "%s on tid %u\n",
1238 print_mac(mac, mgmt->sa), tid);
1239#endif /* CONFIG_MAC80211_HT_DEBUG */
1240 goto end;
1241 }
1242
cee24a3e
RR		 1243 /* prepare A-MPDU MLME for Rx aggregation */
1244 sta->ampdu_mlme.tid_rx[tid] =
1245 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1246 if (!sta->ampdu_mlme.tid_rx[tid]) {
1247 if (net_ratelimit())
1248 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1249 tid);
1250 goto end;
1251 }
1252 /* rx timer */
1253 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1254 sta_rx_agg_session_timer_expired;
1255 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1256 (unsigned long)&sta->timer_to_tid[tid];
1257 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1258
1259 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1260
07db2183
RR		 1261 /* prepare reordering buffer */
1262 tid_agg_rx->reorder_buf =
1263 kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
03147dfc
JB		 1264 if (!tid_agg_rx->reorder_buf) {
1265 if (net_ratelimit())
1266 printk(KERN_ERR "can not allocate reordering buffer "
1267 "to tid %d\n", tid);
cee24a3e 1268 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1269 goto end;
1270 }
1271 memset(tid_agg_rx->reorder_buf, 0,
1272 buf_size * sizeof(struct sk_buf *));
1273
1274 if (local->ops->ampdu_action)
1275 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1276 sta->addr, tid, &start_seq_num);
07db2183
RR		 1277#ifdef CONFIG_MAC80211_HT_DEBUG
1278 printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
1279#endif /* CONFIG_MAC80211_HT_DEBUG */
1280
1281 if (ret) {
1282 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1283 kfree(tid_agg_rx);
1284 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1285 goto end;
1286 }
1287
1288 /* change state and send addba resp */
cee24a3e 1289 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1290 tid_agg_rx->dialog_token = dialog_token;
1291 tid_agg_rx->ssn = start_seq_num;
1292 tid_agg_rx->head_seq_num = start_seq_num;
1293 tid_agg_rx->buf_size = buf_size;
1294 tid_agg_rx->timeout = timeout;
1295 tid_agg_rx->stored_mpdu_num = 0;
1296 status = WLAN_STATUS_SUCCESS;
1297end:
1298 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1299
1300end_no_lock:
d0709a65
JB		 1301 ieee80211_send_addba_resp(sta->sdata->dev, sta->addr, tid,
1302 dialog_token, status, 1, buf_size, timeout);
1303 rcu_read_unlock();
9f985b0e 1304}
f0706e82 1305
eadc8d9e
RR		 1306static void ieee80211_sta_process_addba_resp(struct net_device *dev,
1307 struct ieee80211_mgmt *mgmt,
1308 size_t len)
1309{
1310 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1311 struct ieee80211_hw *hw = &local->hw;
1312 struct sta_info *sta;
1313 u16 capab;
1314 u16 tid;
1315 u8 *state;
1316
d0709a65
JB		 1317 rcu_read_lock();
1318
eadc8d9e 1319 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1320 if (!sta) {
1321 rcu_read_unlock();
eadc8d9e 1322 return;
d0709a65 1323 }
eadc8d9e
RR		 1324
1325 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1326 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1327
cee24a3e 1328 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1329
1330 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1331
cee24a3e
RR		 1332 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1333 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1334 printk(KERN_DEBUG "state not HT_ADDBA_REQUESTED_MSK:"
1335 "%d\n", *state);
1336 goto addba_resp_exit;
1337 }
1338
eadc8d9e 1339 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1340 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
eadc8d9e
RR		 1341 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1342#ifdef CONFIG_MAC80211_HT_DEBUG
1343 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1344#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1345 goto addba_resp_exit;
eadc8d9e
RR		 1346 }
1347
cee24a3e 1348 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1349#ifdef CONFIG_MAC80211_HT_DEBUG
1350 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1351#endif /* CONFIG_MAC80211_HT_DEBUG */
1352 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1353 == WLAN_STATUS_SUCCESS) {
eadc8d9e
RR		 1354 if (*state & HT_ADDBA_RECEIVED_MSK)
1355 printk(KERN_DEBUG "double addBA response\n");
1356
1357 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1358 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e
RR		 1359
1360 if (*state == HT_AGG_STATE_OPERATIONAL) {
1361 printk(KERN_DEBUG "Aggregation on for tid %d \n", tid);
1362 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
1363 }
1364
1365 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1366 printk(KERN_DEBUG "recipient accepted agg: tid %d \n", tid);
1367 } else {
1368 printk(KERN_DEBUG "recipient rejected agg: tid %d \n", tid);
1369
cee24a3e 1370 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1371 /* this will allow the state check in stop_BA_session */
1372 *state = HT_AGG_STATE_OPERATIONAL;
1373 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1374 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1375 WLAN_BACK_INITIATOR);
1376 }
cee24a3e
RR		 1377
1378addba_resp_exit:
d0709a65 1379 rcu_read_unlock();
eadc8d9e
RR		 1380}
1381
1382void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
1383 u16 initiator, u16 reason_code)
07db2183
RR		 1384{
1385 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1386 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1387 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1388 struct sk_buff *skb;
1389 struct ieee80211_mgmt *mgmt;
1390 u16 params;
1391
1392 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
1393 sizeof(mgmt->u.action.u.delba));
1394
1395 if (!skb) {
1396 printk(KERN_ERR "%s: failed to allocate buffer "
1397 "for delba frame\n", dev->name);
1398 return;
1399 }
1400
1401 skb_reserve(skb, local->hw.extra_tx_headroom);
1402 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1403 memset(mgmt, 0, 24);
1404 memcpy(mgmt->da, da, ETH_ALEN);
1405 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
51fb61e7 1406 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
07db2183
RR		 1407 memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
1408 else
1409 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1410 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
1411 IEEE80211_STYPE_ACTION);
1412
1413 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1414
1415 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1416 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1417 params = (u16)(initiator << 11); /* bit 11 initiator */
1418 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1419
1420 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1421 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1422
1423 ieee80211_sta_tx(dev, skb, 0);
1424}
1425
1426void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
1427 u16 initiator, u16 reason)
1428{
1429 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1430 struct ieee80211_hw *hw = &local->hw;
1431 struct sta_info *sta;
b580781e 1432 int ret, i;
07db2183 1433
d0709a65
JB		 1434 rcu_read_lock();
1435
07db2183 1436 sta = sta_info_get(local, ra);
d0709a65
JB		 1437 if (!sta) {
1438 rcu_read_unlock();
07db2183 1439 return;
d0709a65 1440 }
07db2183
RR		 1441
1442 /* check if TID is in operational state */
1443 spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
cee24a3e 1444 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183
RR		 1445 != HT_AGG_STATE_OPERATIONAL) {
1446 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
d0709a65 1447 rcu_read_unlock();
07db2183
RR		 1448 return;
1449 }
cee24a3e 1450 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1451 HT_AGG_STATE_REQ_STOP_BA_MSK |
1452 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
1453 spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
1454
1455 /* stop HW Rx aggregation. ampdu_action existence
1456 * already verified in session init so we add the BUG_ON */
1457 BUG_ON(!local->ops->ampdu_action);
1458
1459 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1460 ra, tid, NULL);
07db2183
RR		 1461 if (ret)
1462 printk(KERN_DEBUG "HW problem - can not stop rx "
1463 "aggergation for tid %d\n", tid);
1464
1465 /* shutdown timer has not expired */
1466 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1467 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1468
1469 /* check if this is a self generated aggregation halt */
1470 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
1471 ieee80211_send_delba(dev, ra, tid, 0, reason);
1472
1473 /* free the reordering buffer */
cee24a3e
RR		 1474 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1475 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1476 /* release the reordered frames */
cee24a3e
RR		 1477 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1478 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1479 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1480 }
1481 }
cee24a3e
RR		 1482 /* free resources */
1483 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1484 kfree(sta->ampdu_mlme.tid_rx[tid]);
1485 sta->ampdu_mlme.tid_rx[tid] = NULL;
1486 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1487
d0709a65 1488 rcu_read_unlock();
07db2183
RR		 1489}
1490
eadc8d9e 1491
688b88a4
RR		 1492static void ieee80211_sta_process_delba(struct net_device *dev,
1493 struct ieee80211_mgmt *mgmt, size_t len)
1494{
1495 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1496 struct sta_info *sta;
1497 u16 tid, params;
1498 u16 initiator;
1499 DECLARE_MAC_BUF(mac);
1500
d0709a65
JB		 1501 rcu_read_lock();
1502
688b88a4 1503 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1504 if (!sta) {
1505 rcu_read_unlock();
688b88a4 1506 return;
d0709a65 1507 }
688b88a4
RR		 1508
1509 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1510 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1511 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1512
1513#ifdef CONFIG_MAC80211_HT_DEBUG
1514 if (net_ratelimit())
d92684e6
RR		 1515 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1516 print_mac(mac, mgmt->sa),
2e354ed7 1517 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1518 mgmt->u.action.u.delba.reason_code);
1519#endif /* CONFIG_MAC80211_HT_DEBUG */
1520
1521 if (initiator == WLAN_BACK_INITIATOR)
1522 ieee80211_sta_stop_rx_ba_session(dev, sta->addr, tid,
1523 WLAN_BACK_INITIATOR, 0);
d92684e6
RR		 1524 else { /* WLAN_BACK_RECIPIENT */
1525 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
cee24a3e 1526 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6
RR		 1527 HT_AGG_STATE_OPERATIONAL;
1528 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1529 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1530 WLAN_BACK_RECIPIENT);
1531 }
d0709a65 1532 rcu_read_unlock();
688b88a4
RR		 1533}
1534
eadc8d9e
RR		 1535/*
1536 * After sending add Block Ack request we activated a timer until
1537 * add Block Ack response will arrive from the recipient.
1538 * If this timer expires sta_addba_resp_timer_expired will be executed.
1539 */
1540void sta_addba_resp_timer_expired(unsigned long data)
1541{
1542 /* not an elegant detour, but there is no choice as the timer passes
1543 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1544 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e
RR		 1545 * array gives the sta through container_of */
1546 u16 tid = *(int *)data;
1547 struct sta_info *temp_sta = container_of((void *)data,
1548 struct sta_info, timer_to_tid[tid]);
1549
1550 struct ieee80211_local *local = temp_sta->local;
1551 struct ieee80211_hw *hw = &local->hw;
1552 struct sta_info *sta;
1553 u8 *state;
1554
d0709a65
JB		 1555 rcu_read_lock();
1556
eadc8d9e 1557 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1558 if (!sta) {
1559 rcu_read_unlock();
eadc8d9e 1560 return;
d0709a65 1561 }
eadc8d9e 1562
cee24a3e 1563 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e
RR		 1564 /* check if the TID waits for addBA response */
1565 spin_lock_bh(&sta->ampdu_mlme.ampdu_tx);
1566 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
1567 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1568 *state = HT_AGG_STATE_IDLE;
1569 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1570 "expecting addBA response there", tid);
1571 goto timer_expired_exit;
1572 }
1573
1574 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
1575
1576 /* go through the state check in stop_BA_session */
1577 *state = HT_AGG_STATE_OPERATIONAL;
1578 spin_unlock_bh(&sta->ampdu_mlme.ampdu_tx);
1579 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1580 WLAN_BACK_INITIATOR);
1581
1582timer_expired_exit:
d0709a65 1583 rcu_read_unlock();
eadc8d9e
RR		 1584}
1585
07db2183 1586/*
7b9d44cd
RR		 1587 * After accepting the AddBA Request we activated a timer,
1588 * resetting it after each frame that arrives from the originator.
07db2183
RR		 1589 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1590 */
1591void sta_rx_agg_session_timer_expired(unsigned long data)
1592{
1593 /* not an elegant detour, but there is no choice as the timer passes
1594 * only one argument, and verious sta_info are needed here, so init
73651ee6 1595 * flow in sta_info_create gives the TID as data, while the timer_to_id
07db2183
RR		 1596 * array gives the sta through container_of */
1597 u8 *ptid = (u8 *)data;
1598 u8 *timer_to_id = ptid - *ptid;
1599 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1600 timer_to_tid[0]);
1601
1602 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
d0709a65
JB		 1603 ieee80211_sta_stop_rx_ba_session(sta->sdata->dev, sta->addr,
1604 (u16)*ptid, WLAN_BACK_TIMER,
07db2183
RR		 1605 WLAN_REASON_QSTA_TIMEOUT);
1606}
1607
85249e5f
RR		 1608void ieee80211_sta_tear_down_BA_sessions(struct net_device *dev, u8 *addr)
1609{
1610 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1611 int i;
1612
1613 for (i = 0; i < STA_TID_NUM; i++) {
1614 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1615 WLAN_BACK_INITIATOR);
1616 ieee80211_sta_stop_rx_ba_session(dev, addr, i,
1617 WLAN_BACK_RECIPIENT,
1618 WLAN_REASON_QSTA_LEAVE_QBSS);
1619 }
1620}
07db2183 1621
f0706e82
JB		 1622static void ieee80211_rx_mgmt_auth(struct net_device *dev,
1623 struct ieee80211_if_sta *ifsta,
1624 struct ieee80211_mgmt *mgmt,
1625 size_t len)
1626{
1627 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1628 u16 auth_alg, auth_transaction, status_code;
0795af57 1629 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1630
1631 if (ifsta->state != IEEE80211_AUTHENTICATE &&
51fb61e7 1632 sdata->vif.type != IEEE80211_IF_TYPE_IBSS) {
f0706e82 1633 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1634 "%s, but not in authenticate state - ignored\n",
1635 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1636 return;
1637 }
1638
1639 if (len < 24 + 6) {
1640 printk(KERN_DEBUG "%s: too short (%zd) authentication frame "
0795af57
JP		 1641 "received from %s - ignored\n",
1642 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1643 return;
1644 }
1645
51fb61e7 1646 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1647 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1648 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1649 "unknown AP (SA=%s BSSID=%s) - "
1650 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1651 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1652 return;
1653 }
1654
51fb61e7 1655 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f0706e82
JB		 1656 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0) {
1657 printk(KERN_DEBUG "%s: authentication frame received from "
0795af57
JP		 1658 "unknown BSSID (SA=%s BSSID=%s) - "
1659 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1660 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1661 return;
1662 }
1663
1664 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1665 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1666 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1667
0795af57 1668 printk(KERN_DEBUG "%s: RX authentication from %s (alg=%d "
f0706e82 1669 "transaction=%d status=%d)\n",
0795af57 1670 dev->name, print_mac(mac, mgmt->sa), auth_alg,
f0706e82
JB		 1671 auth_transaction, status_code);
1672
51fb61e7 1673 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82
JB		 1674 /* IEEE 802.11 standard does not require authentication in IBSS
1675 * networks and most implementations do not seem to use it.
1676 * However, try to reply to authentication attempts if someone
1677 * has actually implemented this.
1678 * TODO: Could implement shared key authentication. */
1679 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
1680 printk(KERN_DEBUG "%s: unexpected IBSS authentication "
1681 "frame (alg=%d transaction=%d)\n",
1682 dev->name, auth_alg, auth_transaction);
1683 return;
1684 }
1685 ieee80211_send_auth(dev, ifsta, 2, NULL, 0, 0);
1686 }
1687
1688 if (auth_alg != ifsta->auth_alg ||
1689 auth_transaction != ifsta->auth_transaction) {
1690 printk(KERN_DEBUG "%s: unexpected authentication frame "
1691 "(alg=%d transaction=%d)\n",
1692 dev->name, auth_alg, auth_transaction);
1693 return;
1694 }
1695
1696 if (status_code != WLAN_STATUS_SUCCESS) {
1697 printk(KERN_DEBUG "%s: AP denied authentication (auth_alg=%d "
1698 "code=%d)\n", dev->name, ifsta->auth_alg, status_code);
1699 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1700 u8 algs[3];
1701 const int num_algs = ARRAY_SIZE(algs);
1702 int i, pos;
1703 algs[0] = algs[1] = algs[2] = 0xff;
1704 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1705 algs[0] = WLAN_AUTH_OPEN;
1706 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1707 algs[1] = WLAN_AUTH_SHARED_KEY;
1708 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1709 algs[2] = WLAN_AUTH_LEAP;
1710 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1711 pos = 0;
1712 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1713 pos = 1;
1714 else
1715 pos = 2;
1716 for (i = 0; i < num_algs; i++) {
1717 pos++;
1718 if (pos >= num_algs)
1719 pos = 0;
1720 if (algs[pos] == ifsta->auth_alg ||
1721 algs[pos] == 0xff)
1722 continue;
1723 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
1724 !ieee80211_sta_wep_configured(dev))
1725 continue;
1726 ifsta->auth_alg = algs[pos];
1727 printk(KERN_DEBUG "%s: set auth_alg=%d for "
1728 "next try\n",
1729 dev->name, ifsta->auth_alg);
1730 break;
1731 }
1732 }
1733 return;
1734 }
1735
1736 switch (ifsta->auth_alg) {
1737 case WLAN_AUTH_OPEN:
1738 case WLAN_AUTH_LEAP:
1739 ieee80211_auth_completed(dev, ifsta);
1740 break;
1741 case WLAN_AUTH_SHARED_KEY:
1742 if (ifsta->auth_transaction == 4)
1743 ieee80211_auth_completed(dev, ifsta);
1744 else
1745 ieee80211_auth_challenge(dev, ifsta, mgmt, len);
1746 break;
1747 }
1748}
1749
1750
1751static void ieee80211_rx_mgmt_deauth(struct net_device *dev,
1752 struct ieee80211_if_sta *ifsta,
1753 struct ieee80211_mgmt *mgmt,
1754 size_t len)
1755{
1756 u16 reason_code;
0795af57 1757 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1758
1759 if (len < 24 + 2) {
1760 printk(KERN_DEBUG "%s: too short (%zd) deauthentication frame "
0795af57
JP		 1761 "received from %s - ignored\n",
1762 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1763 return;
1764 }
1765
1766 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1767 printk(KERN_DEBUG "%s: deauthentication frame received from "
0795af57
JP		 1768 "unknown AP (SA=%s BSSID=%s) - "
1769 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1770 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1771 return;
1772 }
1773
1774 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1775
0795af57 1776 printk(KERN_DEBUG "%s: RX deauthentication from %s"
f0706e82 1777 " (reason=%d)\n",
0795af57 1778 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1779
d6f2da5b 1780 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED) {
f0706e82
JB		 1781 printk(KERN_DEBUG "%s: deauthenticated\n", dev->name);
1782 }
1783
1784 if (ifsta->state == IEEE80211_AUTHENTICATE ||
1785 ifsta->state == IEEE80211_ASSOCIATE ||
1786 ifsta->state == IEEE80211_ASSOCIATED) {
1787 ifsta->state = IEEE80211_AUTHENTICATE;
1788 mod_timer(&ifsta->timer, jiffies +
1789 IEEE80211_RETRY_AUTH_INTERVAL);
1790 }
1791
1792 ieee80211_set_disassoc(dev, ifsta, 1);
d6f2da5b 1793 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 1794}
1795
1796
1797static void ieee80211_rx_mgmt_disassoc(struct net_device *dev,
1798 struct ieee80211_if_sta *ifsta,
1799 struct ieee80211_mgmt *mgmt,
1800 size_t len)
1801{
1802 u16 reason_code;
0795af57 1803 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1804
1805 if (len < 24 + 2) {
1806 printk(KERN_DEBUG "%s: too short (%zd) disassociation frame "
0795af57
JP		 1807 "received from %s - ignored\n",
1808 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1809 return;
1810 }
1811
1812 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1813 printk(KERN_DEBUG "%s: disassociation frame received from "
0795af57
JP		 1814 "unknown AP (SA=%s BSSID=%s) - "
1815 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1816 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1817 return;
1818 }
1819
1820 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1821
0795af57 1822 printk(KERN_DEBUG "%s: RX disassociation from %s"
f0706e82 1823 " (reason=%d)\n",
0795af57 1824 dev->name, print_mac(mac, mgmt->sa), reason_code);
f0706e82 1825
d6f2da5b 1826 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f0706e82
JB		 1827 printk(KERN_DEBUG "%s: disassociated\n", dev->name);
1828
1829 if (ifsta->state == IEEE80211_ASSOCIATED) {
1830 ifsta->state = IEEE80211_ASSOCIATE;
1831 mod_timer(&ifsta->timer, jiffies +
1832 IEEE80211_RETRY_AUTH_INTERVAL);
1833 }
1834
1835 ieee80211_set_disassoc(dev, ifsta, 0);
1836}
1837
1838
471b3efd 1839static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1840 struct ieee80211_if_sta *ifsta,
1841 struct ieee80211_mgmt *mgmt,
1842 size_t len,
1843 int reassoc)
1844{
471b3efd
JB		 1845 struct ieee80211_local *local = sdata->local;
1846 struct net_device *dev = sdata->dev;
8318d78a 1847 struct ieee80211_supported_band *sband;
f0706e82 1848 struct sta_info *sta;
8318d78a 1849 u64 rates, basic_rates;
f0706e82
JB		 1850 u16 capab_info, status_code, aid;
1851 struct ieee802_11_elems elems;
471b3efd 1852 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 1853 u8 *pos;
1854 int i, j;
0795af57 1855 DECLARE_MAC_BUF(mac);
8318d78a 1856 bool have_higher_than_11mbit = false;
f0706e82
JB		 1857
1858 /* AssocResp and ReassocResp have identical structure, so process both
1859 * of them in this function. */
1860
1861 if (ifsta->state != IEEE80211_ASSOCIATE) {
1862 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1863 "%s, but not in associate state - ignored\n",
1864 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 1865 return;
1866 }
1867
1868 if (len < 24 + 6) {
1869 printk(KERN_DEBUG "%s: too short (%zd) association frame "
0795af57
JP		 1870 "received from %s - ignored\n",
1871 dev->name, len, print_mac(mac, mgmt->sa));
f0706e82
JB		 1872 return;
1873 }
1874
1875 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0) {
1876 printk(KERN_DEBUG "%s: association frame received from "
0795af57
JP		 1877 "unknown AP (SA=%s BSSID=%s) - "
1878 "ignored\n", dev->name, print_mac(mac, mgmt->sa),
1879 print_mac(mac, mgmt->bssid));
f0706e82
JB		 1880 return;
1881 }
1882
1883 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
1884 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1885 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 1886
0795af57 1887 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 1888 "status=%d aid=%d)\n",
0795af57 1889 dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 1890 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 1891
1892 if (status_code != WLAN_STATUS_SUCCESS) {
1893 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
1894 dev->name, status_code);
8a69aa93
DD		 1895 /* if this was a reassociation, ensure we try a "full"
1896 * association next time. This works around some broken APs
1897 * which do not correctly reject reassociation requests. */
d6f2da5b 1898 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 1899 return;
1900 }
1901
1dd84aa2
JB		 1902 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1903 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
1904 "set\n", dev->name, aid);
1905 aid &= ~(BIT(15) | BIT(14));
1906
f0706e82 1907 pos = mgmt->u.assoc_resp.variable;
67a4cce4 1908 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 1909
1910 if (!elems.supp_rates) {
1911 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
1912 dev->name);
1913 return;
1914 }
1915
1916 printk(KERN_DEBUG "%s: associated\n", dev->name);
1917 ifsta->aid = aid;
1918 ifsta->ap_capab = capab_info;
1919
1920 kfree(ifsta->assocresp_ies);
1921 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 1922 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 1923 if (ifsta->assocresp_ies)
1924 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
1925
d0709a65
JB		 1926 rcu_read_lock();
1927
f0706e82
JB		 1928 /* Add STA entry for the AP */
1929 sta = sta_info_get(local, ifsta->bssid);
1930 if (!sta) {
1931 struct ieee80211_sta_bss *bss;
73651ee6 1932 int err;
d0709a65 1933
73651ee6
JB		 1934 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
1935 if (!sta) {
1936 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1937 " the AP\n", dev->name);
d0709a65 1938 rcu_read_unlock();
f0706e82
JB		 1939 return;
1940 }
65c107ab 1941 bss = ieee80211_rx_bss_get(dev, ifsta->bssid,
8318d78a 1942 local->hw.conf.channel->center_freq,
cffdd30d 1943 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1944 if (bss) {
1945 sta->last_rssi = bss->rssi;
1946 sta->last_signal = bss->signal;
1947 sta->last_noise = bss->noise;
1948 ieee80211_rx_bss_put(dev, bss);
1949 }
73651ee6
JB		 1950
1951 err = sta_info_insert(sta);
1952 if (err) {
1953 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1954 " the AP (error %d)\n", dev->name, err);
73651ee6
JB		 1955 rcu_read_unlock();
1956 return;
1957 }
f0706e82
JB		 1958 }
1959
73651ee6
JB		 1960 /*
1961 * FIXME: Do we really need to update the sta_info's information here?
1962 * We already know about the AP (we found it in our list) so it
1963 * should already be filled with the right info, no?
1964 * As is stands, all this is racy because typically we assume
1965 * the information that is filled in here (except flags) doesn't
1966 * change while a STA structure is alive. As such, it should move
1967 * to between the sta_info_alloc() and sta_info_insert() above.
1968 */
1969
238814fd
JB		 1970 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
1971 WLAN_STA_AUTHORIZED;
f0706e82
JB		 1972
1973 rates = 0;
8318d78a
JB		 1974 basic_rates = 0;
1975 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1976
f0706e82
JB		 1977 for (i = 0; i < elems.supp_rates_len; i++) {
1978 int rate = (elems.supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1979
1980 if (rate > 110)
1981 have_higher_than_11mbit = true;
1982
1983 for (j = 0; j < sband->n_bitrates; j++) {
1984 if (sband->bitrates[j].bitrate == rate)
f0706e82 1985 rates |= BIT(j);
8318d78a
JB		 1986 if (elems.supp_rates[i] & 0x80)
1987 basic_rates |= BIT(j);
1988 }
f0706e82 1989 }
8318d78a 1990
f0706e82
JB		 1991 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1992 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
8318d78a
JB		 1993
1994 if (rate > 110)
1995 have_higher_than_11mbit = true;
1996
1997 for (j = 0; j < sband->n_bitrates; j++) {
1998 if (sband->bitrates[j].bitrate == rate)
f0706e82 1999 rates |= BIT(j);
8318d78a
JB		 2000 if (elems.ext_supp_rates[i] & 0x80)
2001 basic_rates |= BIT(j);
2002 }
f0706e82 2003 }
8318d78a
JB		 2004
2005 sta->supp_rates[local->hw.conf.channel->band] = rates;
2006 sdata->basic_rates = basic_rates;
2007
2008 /* cf. IEEE 802.11 9.2.12 */
2009 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2010 have_higher_than_11mbit)
2011 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2012 else
2013 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2014
38668c05 2015 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param) {
d3c990fb 2016 struct ieee80211_ht_bss_info bss_info;
d3c990fb
RR		 2017 ieee80211_ht_cap_ie_to_ht_info(
2018 (struct ieee80211_ht_cap *)
2019 elems.ht_cap_elem, &sta->ht_info);
2020 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2021 (struct ieee80211_ht_addt_info *)
2022 elems.ht_info_elem, &bss_info);
38668c05 2023 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
d3c990fb
RR		 2024 }
2025
f0706e82
JB		 2026 rate_control_rate_init(sta, local);
2027
d6f2da5b 2028 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82 2029 sta->flags |= WLAN_STA_WME;
e5f98f2d 2030 rcu_read_unlock();
f0706e82
JB		 2031 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2032 elems.wmm_param_len);
e5f98f2d
JB		 2033 } else
2034 rcu_read_unlock();
f0706e82 2035
8318d78a
JB		 2036 /* set AID, ieee80211_set_associated() will tell the driver */
2037 bss_conf->aid = aid;
2038 ieee80211_set_associated(dev, ifsta, 1);
f0706e82 2039
f0706e82
JB		 2040 ieee80211_associated(dev, ifsta);
2041}
2042
2043
2044/* Caller must hold local->sta_bss_lock */
2045static void __ieee80211_rx_bss_hash_add(struct net_device *dev,
2046 struct ieee80211_sta_bss *bss)
2047{
2048 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
f709fc69 2049 u8 hash_idx;
902acc78
JB		 2050
2051 if (bss_mesh_cfg(bss))
2052 hash_idx = mesh_id_hash(bss_mesh_id(bss),
2053 bss_mesh_id_len(bss));
f709fc69 2054 else
f709fc69 2055 hash_idx = STA_HASH(bss->bssid);
902acc78 2056
f709fc69
LCC		 2057 bss->hnext = local->sta_bss_hash[hash_idx];
2058 local->sta_bss_hash[hash_idx] = bss;
f0706e82
JB		 2059}
2060
2061
2062/* Caller must hold local->sta_bss_lock */
2063static void __ieee80211_rx_bss_hash_del(struct net_device *dev,
2064 struct ieee80211_sta_bss *bss)
2065{
2066 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2067 struct ieee80211_sta_bss *b, *prev = NULL;
2068 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
2069 while (b) {
2070 if (b == bss) {
2071 if (!prev)
2072 local->sta_bss_hash[STA_HASH(bss->bssid)] =
2073 bss->hnext;
2074 else
2075 prev->hnext = bss->hnext;
2076 break;
2077 }
2078 prev = b;
2079 b = b->hnext;
2080 }
2081}
2082
2083
2084static struct ieee80211_sta_bss *
8318d78a 2085ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2086 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2087{
2088 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2089 struct ieee80211_sta_bss *bss;
2090
dd00cc48 2091 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
f0706e82
JB		 2092 if (!bss)
2093 return NULL;
f0706e82
JB		 2094 atomic_inc(&bss->users);
2095 atomic_inc(&bss->users);
2096 memcpy(bss->bssid, bssid, ETH_ALEN);
8318d78a 2097 bss->freq = freq;
cffdd30d
JL		 2098 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
2099 memcpy(bss->ssid, ssid, ssid_len);
2100 bss->ssid_len = ssid_len;
2101 }
f0706e82
JB		 2102
2103 spin_lock_bh(&local->sta_bss_lock);
2104 /* TODO: order by RSSI? */
2105 list_add_tail(&bss->list, &local->sta_bss_list);
2106 __ieee80211_rx_bss_hash_add(dev, bss);
2107 spin_unlock_bh(&local->sta_bss_lock);
2108 return bss;
2109}
2110
f0706e82 2111static struct ieee80211_sta_bss *
8318d78a 2112ieee80211_rx_bss_get(struct net_device *dev, u8 *bssid, int freq,
cffdd30d 2113 u8 *ssid, u8 ssid_len)
f0706e82
JB		 2114{
2115 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2116 struct ieee80211_sta_bss *bss;
2117
2118 spin_lock_bh(&local->sta_bss_lock);
2119 bss = local->sta_bss_hash[STA_HASH(bssid)];
2120 while (bss) {
902acc78
JB		 2121 if (!bss_mesh_cfg(bss) &&
2122 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
8318d78a 2123 bss->freq == freq &&
cffdd30d
JL		 2124 bss->ssid_len == ssid_len &&
2125 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
f0706e82
JB		 2126 atomic_inc(&bss->users);
2127 break;
2128 }
2129 bss = bss->hnext;
2130 }
2131 spin_unlock_bh(&local->sta_bss_lock);
2132 return bss;
2133}
2134
f709fc69
LCC		 2135#ifdef CONFIG_MAC80211_MESH
2136static struct ieee80211_sta_bss *
2137ieee80211_rx_mesh_bss_get(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
2138 u8 *mesh_cfg, int freq)
2139{
2140 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2141 struct ieee80211_sta_bss *bss;
2142
2143 spin_lock_bh(&local->sta_bss_lock);
2144 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
2145 while (bss) {
902acc78
JB		 2146 if (bss_mesh_cfg(bss) &&
2147 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
f709fc69
LCC		 2148 bss->freq == freq &&
2149 mesh_id_len == bss->mesh_id_len &&
2150 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
2151 mesh_id_len))) {
2152 atomic_inc(&bss->users);
2153 break;
2154 }
2155 bss = bss->hnext;
2156 }
2157 spin_unlock_bh(&local->sta_bss_lock);
2158 return bss;
2159}
2160
2161static struct ieee80211_sta_bss *
2162ieee80211_rx_mesh_bss_add(struct net_device *dev, u8 *mesh_id, int mesh_id_len,
05e5e883 2163 u8 *mesh_cfg, int mesh_config_len, int freq)
f709fc69
LCC		 2164{
2165 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2166 struct ieee80211_sta_bss *bss;
2167
05e5e883
LCC		 2168 if (mesh_config_len != MESH_CFG_LEN)
2169 return NULL;
2170
f709fc69
LCC		 2171 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
2172 if (!bss)
2173 return NULL;
2174
24736701 2175 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
f709fc69
LCC		 2176 if (!bss->mesh_cfg) {
2177 kfree(bss);
2178 return NULL;
2179 }
2180
2181 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
2182 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
2183 if (!bss->mesh_id) {
2184 kfree(bss->mesh_cfg);
2185 kfree(bss);
2186 return NULL;
2187 }
2188 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
2189 }
2190
2191 atomic_inc(&bss->users);
2192 atomic_inc(&bss->users);
24736701 2193 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
f709fc69
LCC		 2194 bss->mesh_id_len = mesh_id_len;
2195 bss->freq = freq;
2196 spin_lock_bh(&local->sta_bss_lock);
2197 /* TODO: order by RSSI? */
2198 list_add_tail(&bss->list, &local->sta_bss_list);
2199 __ieee80211_rx_bss_hash_add(dev, bss);
2200 spin_unlock_bh(&local->sta_bss_lock);
2201 return bss;
2202}
2203#endif
f0706e82
JB		 2204
2205static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
2206{
2207 kfree(bss->wpa_ie);
2208 kfree(bss->rsn_ie);
2209 kfree(bss->wmm_ie);
c7153508 2210 kfree(bss->ht_ie);
902acc78
JB		 2211 kfree(bss_mesh_id(bss));
2212 kfree(bss_mesh_cfg(bss));
f0706e82
JB		 2213 kfree(bss);
2214}
2215
2216
2217static void ieee80211_rx_bss_put(struct net_device *dev,
2218 struct ieee80211_sta_bss *bss)
2219{
2220 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2221 if (!atomic_dec_and_test(&bss->users))
2222 return;
2223
2224 spin_lock_bh(&local->sta_bss_lock);
2225 __ieee80211_rx_bss_hash_del(dev, bss);
2226 list_del(&bss->list);
2227 spin_unlock_bh(&local->sta_bss_lock);
2228 ieee80211_rx_bss_free(bss);
2229}
2230
2231
2232void ieee80211_rx_bss_list_init(struct net_device *dev)
2233{
2234 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2235 spin_lock_init(&local->sta_bss_lock);
2236 INIT_LIST_HEAD(&local->sta_bss_list);
2237}
2238
2239
2240void ieee80211_rx_bss_list_deinit(struct net_device *dev)
2241{
2242 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2243 struct ieee80211_sta_bss *bss, *tmp;
2244
2245 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
2246 ieee80211_rx_bss_put(dev, bss);
2247}
2248
2249
a607268a
BR		 2250static int ieee80211_sta_join_ibss(struct net_device *dev,
2251 struct ieee80211_if_sta *ifsta,
2252 struct ieee80211_sta_bss *bss)
2253{
2254 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2255 int res, rates, i, j;
2256 struct sk_buff *skb;
2257 struct ieee80211_mgmt *mgmt;
2258 struct ieee80211_tx_control control;
2259 struct rate_selection ratesel;
2260 u8 *pos;
2261 struct ieee80211_sub_if_data *sdata;
2262 struct ieee80211_supported_band *sband;
2263
2264 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2265
9dd6aed0
JB		 2266 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2267
a607268a 2268 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2269 sta_info_flush_delayed(sdata);
a607268a
BR		 2270
2271 if (local->ops->reset_tsf) {
2272 /* Reset own TSF to allow time synchronization work. */
2273 local->ops->reset_tsf(local_to_hw(local));
2274 }
2275 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
2276 res = ieee80211_if_config(dev);
2277 if (res)
2278 return res;
2279
2280 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2281
a607268a
BR		 2282 sdata->drop_unencrypted = bss->capability &
2283 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2284
2285 res = ieee80211_set_freq(local, bss->freq);
2286
2287 if (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS) {
2288 printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
2289 "%d MHz\n", dev->name, local->oper_channel->center_freq);
2290 return -1;
2291 }
2292
2293 /* Set beacon template */
2294 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
2295 do {
2296 if (!skb)
2297 break;
2298
2299 skb_reserve(skb, local->hw.extra_tx_headroom);
2300
2301 mgmt = (struct ieee80211_mgmt *)
2302 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2303 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2304 mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2305 IEEE80211_STYPE_BEACON);
2306 memset(mgmt->da, 0xff, ETH_ALEN);
2307 memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
2308 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2309 mgmt->u.beacon.beacon_int =
2310 cpu_to_le16(local->hw.conf.beacon_int);
2311 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2312
2313 pos = skb_put(skb, 2 + ifsta->ssid_len);
2314 *pos++ = WLAN_EID_SSID;
2315 *pos++ = ifsta->ssid_len;
2316 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2317
2318 rates = bss->supp_rates_len;
2319 if (rates > 8)
2320 rates = 8;
2321 pos = skb_put(skb, 2 + rates);
2322 *pos++ = WLAN_EID_SUPP_RATES;
2323 *pos++ = rates;
2324 memcpy(pos, bss->supp_rates, rates);
2325
2326 if (bss->band == IEEE80211_BAND_2GHZ) {
2327 pos = skb_put(skb, 2 + 1);
2328 *pos++ = WLAN_EID_DS_PARAMS;
2329 *pos++ = 1;
2330 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2331 }
2332
2333 pos = skb_put(skb, 2 + 2);
2334 *pos++ = WLAN_EID_IBSS_PARAMS;
2335 *pos++ = 2;
2336 /* FIX: set ATIM window based on scan results */
2337 *pos++ = 0;
2338 *pos++ = 0;
2339
2340 if (bss->supp_rates_len > 8) {
2341 rates = bss->supp_rates_len - 8;
2342 pos = skb_put(skb, 2 + rates);
2343 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2344 *pos++ = rates;
2345 memcpy(pos, &bss->supp_rates[8], rates);
2346 }
2347
2348 memset(&control, 0, sizeof(control));
2349 rate_control_get_rate(dev, sband, skb, &ratesel);
2350 if (!ratesel.rate) {
2351 printk(KERN_DEBUG "%s: Failed to determine TX rate "
2352 "for IBSS beacon\n", dev->name);
2353 break;
2354 }
2355 control.vif = &sdata->vif;
2356 control.tx_rate = ratesel.rate;
2357 if (sdata->bss_conf.use_short_preamble &&
2358 ratesel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
2359 control.flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
2360 control.antenna_sel_tx = local->hw.conf.antenna_sel_tx;
2361 control.flags |= IEEE80211_TXCTL_NO_ACK;
2362 control.retry_limit = 1;
2363
2364 ifsta->probe_resp = skb_copy(skb, GFP_ATOMIC);
2365 if (ifsta->probe_resp) {
2366 mgmt = (struct ieee80211_mgmt *)
2367 ifsta->probe_resp->data;
2368 mgmt->frame_control =
2369 IEEE80211_FC(IEEE80211_FTYPE_MGMT,
2370 IEEE80211_STYPE_PROBE_RESP);
2371 } else {
2372 printk(KERN_DEBUG "%s: Could not allocate ProbeResp "
2373 "template for IBSS\n", dev->name);
2374 }
2375
2376 if (local->ops->beacon_update &&
2377 local->ops->beacon_update(local_to_hw(local),
2378 skb, &control) == 0) {
2379 printk(KERN_DEBUG "%s: Configured IBSS beacon "
2380 "template\n", dev->name);
2381 skb = NULL;
2382 }
2383
2384 rates = 0;
2385 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2386 for (i = 0; i < bss->supp_rates_len; i++) {
2387 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2388 for (j = 0; j < sband->n_bitrates; j++)
2389 if (sband->bitrates[j].bitrate == bitrate)
2390 rates |= BIT(j);
2391 }
2392 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
e2839d8f
VK		 2393
2394 ieee80211_sta_def_wmm_params(dev, bss, 1);
a607268a
BR		 2395 } while (0);
2396
2397 if (skb) {
2398 printk(KERN_DEBUG "%s: Failed to configure IBSS beacon "
2399 "template\n", dev->name);
2400 dev_kfree_skb(skb);
2401 }
2402
2403 ifsta->state = IEEE80211_IBSS_JOINED;
2404 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2405
2406 ieee80211_rx_bss_put(dev, bss);
2407
2408 return res;
2409}
2410
f709fc69
LCC		 2411u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2412 struct ieee802_11_elems *elems,
2413 enum ieee80211_band band)
2414{
2415 struct ieee80211_supported_band *sband;
2416 struct ieee80211_rate *bitrates;
2417 size_t num_rates;
2418 u64 supp_rates;
2419 int i, j;
2420 sband = local->hw.wiphy->bands[band];
2421
2422 if (!sband) {
2423 WARN_ON(1);
2424 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2425 }
2426
2427 bitrates = sband->bitrates;
2428 num_rates = sband->n_bitrates;
2429 supp_rates = 0;
2430 for (i = 0; i < elems->supp_rates_len +
2431 elems->ext_supp_rates_len; i++) {
2432 u8 rate = 0;
2433 int own_rate;
2434 if (i < elems->supp_rates_len)
2435 rate = elems->supp_rates[i];
2436 else if (elems->ext_supp_rates)
2437 rate = elems->ext_supp_rates
2438 [i - elems->supp_rates_len];
2439 own_rate = 5 * (rate & 0x7f);
2440 for (j = 0; j < num_rates; j++)
2441 if (bitrates[j].bitrate == own_rate)
2442 supp_rates |= BIT(j);
2443 }
2444 return supp_rates;
2445}
2446
a607268a 2447
f0706e82
JB		 2448static void ieee80211_rx_bss_info(struct net_device *dev,
2449 struct ieee80211_mgmt *mgmt,
2450 size_t len,
2451 struct ieee80211_rx_status *rx_status,
2452 int beacon)
2453{
2454 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2455 struct ieee802_11_elems elems;
2456 size_t baselen;
8318d78a 2457 int freq, clen;
f0706e82
JB		 2458 struct ieee80211_sta_bss *bss;
2459 struct sta_info *sta;
2460 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
9d9bf77d 2461 u64 beacon_timestamp, rx_timestamp;
fab7d4a2 2462 struct ieee80211_channel *channel;
0795af57
JP		 2463 DECLARE_MAC_BUF(mac);
2464 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 2465
2466 if (!beacon && memcmp(mgmt->da, dev->dev_addr, ETH_ALEN))
2467 return; /* ignore ProbeResp to foreign address */
2468
2469#if 0
0795af57 2470 printk(KERN_DEBUG "%s: RX %s from %s to %s\n",
f0706e82 2471 dev->name, beacon ? "Beacon" : "Probe Response",
0795af57 2472 print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da));
f0706e82
JB		 2473#endif
2474
2475 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2476 if (baselen > len)
2477 return;
2478
9d9bf77d 2479 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
67a4cce4 2480 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2481
902acc78
JB		 2482 if (ieee80211_vif_is_mesh(&sdata->vif) && elems.mesh_id &&
2483 elems.mesh_config && mesh_matches_local(&elems, dev)) {
2484 u64 rates = ieee80211_sta_get_rates(local, &elems,
2485 rx_status->band);
2486
2487 mesh_neighbour_update(mgmt->sa, rates, dev,
2488 mesh_peer_accepts_plinks(&elems, dev));
2489 }
f709fc69 2490
d0709a65
JB		 2491 rcu_read_lock();
2492
51fb61e7 2493 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems.supp_rates &&
f0706e82
JB		 2494 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0 &&
2495 (sta = sta_info_get(local, mgmt->sa))) {
f709fc69
LCC		 2496 u64 prev_rates;
2497 u64 supp_rates = ieee80211_sta_get_rates(local, &elems,
2498 rx_status->band);
f0706e82 2499
8318d78a
JB		 2500 prev_rates = sta->supp_rates[rx_status->band];
2501 sta->supp_rates[rx_status->band] &= supp_rates;
2502 if (sta->supp_rates[rx_status->band] == 0) {
f0706e82
JB		 2503 /* No matching rates - this should not really happen.
2504 * Make sure that at least one rate is marked
2505 * supported to avoid issues with TX rate ctrl. */
8318d78a
JB		 2506 sta->supp_rates[rx_status->band] =
2507 sdata->u.sta.supp_rates_bits[rx_status->band];
f0706e82 2508 }
8318d78a 2509 if (sta->supp_rates[rx_status->band] != prev_rates) {
f0706e82 2510 printk(KERN_DEBUG "%s: updated supp_rates set for "
8318d78a
JB		 2511 "%s based on beacon info (0x%llx & 0x%llx -> "
2512 "0x%llx)\n",
2513 dev->name, print_mac(mac, sta->addr),
2514 (unsigned long long) prev_rates,
2515 (unsigned long long) supp_rates,
2516 (unsigned long long) sta->supp_rates[rx_status->band]);
f0706e82 2517 }
f0706e82
JB		 2518 }
2519
d0709a65
JB		 2520 rcu_read_unlock();
2521
f0706e82 2522 if (elems.ds_params && elems.ds_params_len == 1)
8318d78a 2523 freq = ieee80211_channel_to_frequency(elems.ds_params[0]);
f0706e82 2524 else
8318d78a 2525 freq = rx_status->freq;
f0706e82 2526
fab7d4a2
JB		 2527 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2528
2529 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2530 return;
2531
f709fc69
LCC		 2532#ifdef CONFIG_MAC80211_MESH
2533 if (elems.mesh_config)
2534 bss = ieee80211_rx_mesh_bss_get(dev, elems.mesh_id,
2535 elems.mesh_id_len, elems.mesh_config, freq);
2536 else
2537#endif
2538 bss = ieee80211_rx_bss_get(dev, mgmt->bssid, freq,
cffdd30d 2539 elems.ssid, elems.ssid_len);
f709fc69
LCC		 2540 if (!bss) {
2541#ifdef CONFIG_MAC80211_MESH
2542 if (elems.mesh_config)
2543 bss = ieee80211_rx_mesh_bss_add(dev, elems.mesh_id,
05e5e883
LCC		 2544 elems.mesh_id_len, elems.mesh_config,
2545 elems.mesh_config_len, freq);
f709fc69
LCC		 2546 else
2547#endif
2548 bss = ieee80211_rx_bss_add(dev, mgmt->bssid, freq,
2549 elems.ssid, elems.ssid_len);
f0706e82
JB		 2550 if (!bss)
2551 return;
2552 } else {
2553#if 0
2554 /* TODO: order by RSSI? */
2555 spin_lock_bh(&local->sta_bss_lock);
2556 list_move_tail(&bss->list, &local->sta_bss_list);
2557 spin_unlock_bh(&local->sta_bss_lock);
2558#endif
2559 }
2560
8318d78a
JB		 2561 bss->band = rx_status->band;
2562
9d9bf77d
BR		 2563 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
2564 bss->probe_resp && beacon) {
2565 /* STA mode:
2566 * Do not allow beacon to override data from Probe Response. */
f0706e82
JB		 2567 ieee80211_rx_bss_put(dev, bss);
2568 return;
2569 }
2570
5628221c
DD		 2571 /* save the ERP value so that it is available at association time */
2572 if (elems.erp_info && elems.erp_info_len >= 1) {
2573 bss->erp_value = elems.erp_info[0];
2574 bss->has_erp_value = 1;
2575 }
2576
f0706e82
JB		 2577 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2578 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82
JB		 2579
2580 bss->supp_rates_len = 0;
2581 if (elems.supp_rates) {
2582 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2583 if (clen > elems.supp_rates_len)
2584 clen = elems.supp_rates_len;
2585 memcpy(&bss->supp_rates[bss->supp_rates_len], elems.supp_rates,
2586 clen);
2587 bss->supp_rates_len += clen;
2588 }
2589 if (elems.ext_supp_rates) {
2590 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
2591 if (clen > elems.ext_supp_rates_len)
2592 clen = elems.ext_supp_rates_len;
2593 memcpy(&bss->supp_rates[bss->supp_rates_len],
2594 elems.ext_supp_rates, clen);
2595 bss->supp_rates_len += clen;
2596 }
2597
2598 if (elems.wpa &&
2599 (!bss->wpa_ie || bss->wpa_ie_len != elems.wpa_len ||
2600 memcmp(bss->wpa_ie, elems.wpa, elems.wpa_len))) {
2601 kfree(bss->wpa_ie);
2602 bss->wpa_ie = kmalloc(elems.wpa_len + 2, GFP_ATOMIC);
2603 if (bss->wpa_ie) {
2604 memcpy(bss->wpa_ie, elems.wpa - 2, elems.wpa_len + 2);
2605 bss->wpa_ie_len = elems.wpa_len + 2;
2606 } else
2607 bss->wpa_ie_len = 0;
2608 } else if (!elems.wpa && bss->wpa_ie) {
2609 kfree(bss->wpa_ie);
2610 bss->wpa_ie = NULL;
2611 bss->wpa_ie_len = 0;
2612 }
2613
2614 if (elems.rsn &&
2615 (!bss->rsn_ie || bss->rsn_ie_len != elems.rsn_len ||
2616 memcmp(bss->rsn_ie, elems.rsn, elems.rsn_len))) {
2617 kfree(bss->rsn_ie);
2618 bss->rsn_ie = kmalloc(elems.rsn_len + 2, GFP_ATOMIC);
2619 if (bss->rsn_ie) {
2620 memcpy(bss->rsn_ie, elems.rsn - 2, elems.rsn_len + 2);
2621 bss->rsn_ie_len = elems.rsn_len + 2;
2622 } else
2623 bss->rsn_ie_len = 0;
2624 } else if (!elems.rsn && bss->rsn_ie) {
2625 kfree(bss->rsn_ie);
2626 bss->rsn_ie = NULL;
2627 bss->rsn_ie_len = 0;
2628 }
2629
2630 if (elems.wmm_param &&
2631 (!bss->wmm_ie || bss->wmm_ie_len != elems.wmm_param_len ||
2632 memcmp(bss->wmm_ie, elems.wmm_param, elems.wmm_param_len))) {
2633 kfree(bss->wmm_ie);
2634 bss->wmm_ie = kmalloc(elems.wmm_param_len + 2, GFP_ATOMIC);
2635 if (bss->wmm_ie) {
2636 memcpy(bss->wmm_ie, elems.wmm_param - 2,
2637 elems.wmm_param_len + 2);
2638 bss->wmm_ie_len = elems.wmm_param_len + 2;
2639 } else
2640 bss->wmm_ie_len = 0;
2641 } else if (!elems.wmm_param && bss->wmm_ie) {
2642 kfree(bss->wmm_ie);
2643 bss->wmm_ie = NULL;
2644 bss->wmm_ie_len = 0;
2645 }
c7153508
RR		 2646 if (elems.ht_cap_elem &&
2647 (!bss->ht_ie || bss->ht_ie_len != elems.ht_cap_elem_len ||
2648 memcmp(bss->ht_ie, elems.ht_cap_elem, elems.ht_cap_elem_len))) {
2649 kfree(bss->ht_ie);
2650 bss->ht_ie = kmalloc(elems.ht_cap_elem_len + 2, GFP_ATOMIC);
2651 if (bss->ht_ie) {
2652 memcpy(bss->ht_ie, elems.ht_cap_elem - 2,
2653 elems.ht_cap_elem_len + 2);
2654 bss->ht_ie_len = elems.ht_cap_elem_len + 2;
2655 } else
2656 bss->ht_ie_len = 0;
2657 } else if (!elems.ht_cap_elem && bss->ht_ie) {
2658 kfree(bss->ht_ie);
2659 bss->ht_ie = NULL;
2660 bss->ht_ie_len = 0;
2661 }
f0706e82 2662
9d9bf77d 2663 bss->timestamp = beacon_timestamp;
f0706e82
JB		 2664 bss->last_update = jiffies;
2665 bss->rssi = rx_status->ssi;
2666 bss->signal = rx_status->signal;
2667 bss->noise = rx_status->noise;
2668 if (!beacon)
2669 bss->probe_resp++;
9d9bf77d
BR		 2670
2671 /* check if we need to merge IBSS */
2672 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2673 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2674 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d
BR		 2675 bss->freq == local->oper_channel->center_freq &&
2676 elems.ssid_len == sdata->u.sta.ssid_len &&
2677 memcmp(elems.ssid, sdata->u.sta.ssid, sdata->u.sta.ssid_len) == 0) {
2678 if (rx_status->flag & RX_FLAG_TSFT) {
2679 /* in order for correct IBSS merging we need mactime
2680 *
2681 * since mactime is defined as the time the first data
2682 * symbol of the frame hits the PHY, and the timestamp
2683 * of the beacon is defined as "the time that the data
2684 * symbol containing the first bit of the timestamp is
2685 * transmitted to the PHY plus the transmitting STA’s
2686 * delays through its local PHY from the MAC-PHY
2687 * interface to its interface with the WM"
2688 * (802.11 11.1.2) - equals the time this bit arrives at
2689 * the receiver - we have to take into account the
2690 * offset between the two.
2691 * e.g: at 1 MBit that means mactime is 192 usec earlier
2692 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2693 */
2694 int rate = local->hw.wiphy->bands[rx_status->band]->
2695 bitrates[rx_status->rate_idx].bitrate;
2696 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2697 } else if (local && local->ops && local->ops->get_tsf)
2698 /* second best option: get current TSF */
2699 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2700 else
2701 /* can't merge without knowing the TSF */
2702 rx_timestamp = -1LLU;
2703#ifdef CONFIG_MAC80211_IBSS_DEBUG
2704 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2705 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2706 print_mac(mac, mgmt->sa),
2707 print_mac(mac2, mgmt->bssid),
2708 (unsigned long long)rx_timestamp,
2709 (unsigned long long)beacon_timestamp,
2710 (unsigned long long)(rx_timestamp - beacon_timestamp),
2711 jiffies);
2712#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2713 if (beacon_timestamp > rx_timestamp) {
fba4a1e6 2714#ifndef CONFIG_MAC80211_IBSS_DEBUG
d97cf015 2715 if (net_ratelimit())
fba4a1e6 2716#endif
9d9bf77d
BR		 2717 printk(KERN_DEBUG "%s: beacon TSF higher than "
2718 "local TSF - IBSS merge with BSSID %s\n",
2719 dev->name, print_mac(mac, mgmt->bssid));
2720 ieee80211_sta_join_ibss(dev, &sdata->u.sta, bss);
2721 ieee80211_ibss_add_sta(dev, NULL,
2722 mgmt->bssid, mgmt->sa);
2723 }
2724 }
2725
f0706e82
JB		 2726 ieee80211_rx_bss_put(dev, bss);
2727}
2728
2729
2730static void ieee80211_rx_mgmt_probe_resp(struct net_device *dev,
2731 struct ieee80211_mgmt *mgmt,
2732 size_t len,
2733 struct ieee80211_rx_status *rx_status)
2734{
2735 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 0);
2736}
2737
2738
2739static void ieee80211_rx_mgmt_beacon(struct net_device *dev,
2740 struct ieee80211_mgmt *mgmt,
2741 size_t len,
2742 struct ieee80211_rx_status *rx_status)
2743{
f0706e82
JB		 2744 struct ieee80211_sub_if_data *sdata;
2745 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2746 size_t baselen;
2747 struct ieee802_11_elems elems;
d3c990fb
RR		 2748 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2749 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2750 u32 changed = 0;
f0706e82
JB		 2751
2752 ieee80211_rx_bss_info(dev, mgmt, len, rx_status, 1);
2753
2754 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 2755 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2756 return;
2757 ifsta = &sdata->u.sta;
2758
d6f2da5b 2759 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2760 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2761 return;
2762
2763 /* Process beacon from the current BSS */
2764 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2765 if (baselen > len)
2766 return;
2767
67a4cce4 2768 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
f0706e82 2769
5628221c 2770 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2771 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
f0706e82 2772
d3c990fb 2773 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2774 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2775 struct ieee80211_ht_bss_info bss_info;
2776
2777 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2778 (struct ieee80211_ht_addt_info *)
2779 elems.ht_info_elem, &bss_info);
38668c05
TW		 2780 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2781 &bss_info);
d3c990fb
RR		 2782 }
2783
d6f2da5b 2784 if (elems.wmm_param && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 2785 ieee80211_sta_wmm_params(dev, ifsta, elems.wmm_param,
2786 elems.wmm_param_len);
2787 }
471b3efd
JB		 2788
2789 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2790}
2791
2792
2793static void ieee80211_rx_mgmt_probe_req(struct net_device *dev,
2794 struct ieee80211_if_sta *ifsta,
2795 struct ieee80211_mgmt *mgmt,
2796 size_t len,
2797 struct ieee80211_rx_status *rx_status)
2798{
2799 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2800 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2801 int tx_last_beacon;
2802 struct sk_buff *skb;
2803 struct ieee80211_mgmt *resp;
2804 u8 *pos, *end;
0795af57
JP		 2805 DECLARE_MAC_BUF(mac);
2806#ifdef CONFIG_MAC80211_IBSS_DEBUG
2807 DECLARE_MAC_BUF(mac2);
2808 DECLARE_MAC_BUF(mac3);
2809#endif
f0706e82 2810
51fb61e7 2811 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
f0706e82
JB		 2812 ifsta->state != IEEE80211_IBSS_JOINED ||
2813 len < 24 + 2 || !ifsta->probe_resp)
2814 return;
2815
2816 if (local->ops->tx_last_beacon)
2817 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2818 else
2819 tx_last_beacon = 1;
2820
2821#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2822 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2823 "%s (tx_last_beacon=%d)\n",
2824 dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
2825 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2826#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2827
2828 if (!tx_last_beacon)
2829 return;
2830
2831 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2832 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2833 return;
2834
2835 end = ((u8 *) mgmt) + len;
2836 pos = mgmt->u.probe_req.variable;
2837 if (pos[0] != WLAN_EID_SSID ||
2838 pos + 2 + pos[1] > end) {
2839 if (net_ratelimit()) {
2840 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
0795af57
JP		 2841 "from %s\n",
2842 dev->name, print_mac(mac, mgmt->sa));
f0706e82
JB		 2843 }
2844 return;
2845 }
2846 if (pos[1] != 0 &&
2847 (pos[1] != ifsta->ssid_len ||
2848 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2849 /* Ignore ProbeReq for foreign SSID */
2850 return;
2851 }
2852
2853 /* Reply with ProbeResp */
0ec0b7ac 2854 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2855 if (!skb)
2856 return;
2857
2858 resp = (struct ieee80211_mgmt *) skb->data;
2859 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2860#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2861 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
2862 dev->name, print_mac(mac, resp->da));
f0706e82
JB		 2863#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2864 ieee80211_sta_tx(dev, skb, 0);
2865}
2866
4e20cb29
JB		 2867static void ieee80211_rx_mgmt_action(struct net_device *dev,
2868 struct ieee80211_if_sta *ifsta,
2869 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2870 size_t len,
2871 struct ieee80211_rx_status *rx_status)
9f985b0e 2872{
f709fc69 2873 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f709fc69 2874
9f985b0e
RR		 2875 if (len < IEEE80211_MIN_ACTION_SIZE)
2876 return;
2877
2878 switch (mgmt->u.action.category) {
2879 case WLAN_CATEGORY_BACK:
2880 switch (mgmt->u.action.u.addba_req.action_code) {
2881 case WLAN_ACTION_ADDBA_REQ:
2882 if (len < (IEEE80211_MIN_ACTION_SIZE +
2883 sizeof(mgmt->u.action.u.addba_req)))
2884 break;
2885 ieee80211_sta_process_addba_request(dev, mgmt, len);
2886 break;
eadc8d9e
RR		 2887 case WLAN_ACTION_ADDBA_RESP:
2888 if (len < (IEEE80211_MIN_ACTION_SIZE +
2889 sizeof(mgmt->u.action.u.addba_resp)))
2890 break;
2891 ieee80211_sta_process_addba_resp(dev, mgmt, len);
2892 break;
688b88a4
RR		 2893 case WLAN_ACTION_DELBA:
2894 if (len < (IEEE80211_MIN_ACTION_SIZE +
2895 sizeof(mgmt->u.action.u.delba)))
2896 break;
2897 ieee80211_sta_process_delba(dev, mgmt, len);
2898 break;
9f985b0e
RR		 2899 default:
2900 if (net_ratelimit())
688b88a4 2901 printk(KERN_DEBUG "%s: Rx unknown A-MPDU action\n",
9f985b0e
RR		 2902 dev->name);
2903 break;
2904 }
2905 break;
f709fc69 2906 case PLINK_CATEGORY:
902acc78 2907 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2908 mesh_rx_plink_frame(dev, mgmt, len, rx_status);
2909 break;
f709fc69 2910 case MESH_PATH_SEL_CATEGORY:
902acc78 2911 if (ieee80211_vif_is_mesh(&sdata->vif))
f709fc69
LCC		 2912 mesh_rx_path_sel_frame(dev, mgmt, len);
2913 break;
9f985b0e 2914 default:
f709fc69
LCC		 2915 if (net_ratelimit())
2916 printk(KERN_DEBUG "%s: Rx unknown action frame - "
2917 "category=%d\n", dev->name, mgmt->u.action.category);
9f985b0e
RR		 2918 break;
2919 }
2920}
f0706e82
JB		 2921
2922void ieee80211_sta_rx_mgmt(struct net_device *dev, struct sk_buff *skb,
2923 struct ieee80211_rx_status *rx_status)
2924{
2925 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
2926 struct ieee80211_sub_if_data *sdata;
2927 struct ieee80211_if_sta *ifsta;
2928 struct ieee80211_mgmt *mgmt;
2929 u16 fc;
2930
2931 if (skb->len < 24)
2932 goto fail;
2933
2934 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2935 ifsta = &sdata->u.sta;
2936
2937 mgmt = (struct ieee80211_mgmt *) skb->data;
2938 fc = le16_to_cpu(mgmt->frame_control);
2939
2940 switch (fc & IEEE80211_FCTL_STYPE) {
2941 case IEEE80211_STYPE_PROBE_REQ:
2942 case IEEE80211_STYPE_PROBE_RESP:
2943 case IEEE80211_STYPE_BEACON:
f709fc69 2944 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2945 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2946 case IEEE80211_STYPE_AUTH:
2947 case IEEE80211_STYPE_ASSOC_RESP:
2948 case IEEE80211_STYPE_REASSOC_RESP:
2949 case IEEE80211_STYPE_DEAUTH:
2950 case IEEE80211_STYPE_DISASSOC:
2951 skb_queue_tail(&ifsta->skb_queue, skb);
2952 queue_work(local->hw.workqueue, &ifsta->work);
2953 return;
2954 default:
2955 printk(KERN_DEBUG "%s: received unknown management frame - "
2956 "stype=%d\n", dev->name,
2957 (fc & IEEE80211_FCTL_STYPE) >> 4);
2958 break;
2959 }
2960
2961 fail:
2962 kfree_skb(skb);
2963}
2964
2965
2966static void ieee80211_sta_rx_queued_mgmt(struct net_device *dev,
2967 struct sk_buff *skb)
2968{
2969 struct ieee80211_rx_status *rx_status;
2970 struct ieee80211_sub_if_data *sdata;
2971 struct ieee80211_if_sta *ifsta;
2972 struct ieee80211_mgmt *mgmt;
2973 u16 fc;
2974
2975 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2976 ifsta = &sdata->u.sta;
2977
2978 rx_status = (struct ieee80211_rx_status *) skb->cb;
2979 mgmt = (struct ieee80211_mgmt *) skb->data;
2980 fc = le16_to_cpu(mgmt->frame_control);
2981
2982 switch (fc & IEEE80211_FCTL_STYPE) {
2983 case IEEE80211_STYPE_PROBE_REQ:
2984 ieee80211_rx_mgmt_probe_req(dev, ifsta, mgmt, skb->len,
2985 rx_status);
2986 break;
2987 case IEEE80211_STYPE_PROBE_RESP:
2988 ieee80211_rx_mgmt_probe_resp(dev, mgmt, skb->len, rx_status);
2989 break;
2990 case IEEE80211_STYPE_BEACON:
2991 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len, rx_status);
2992 break;
2993 case IEEE80211_STYPE_AUTH:
2994 ieee80211_rx_mgmt_auth(dev, ifsta, mgmt, skb->len);
2995 break;
2996 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2997 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2998 break;
2999 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 3000 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 3001 break;
3002 case IEEE80211_STYPE_DEAUTH:
3003 ieee80211_rx_mgmt_deauth(dev, ifsta, mgmt, skb->len);
3004 break;
3005 case IEEE80211_STYPE_DISASSOC:
3006 ieee80211_rx_mgmt_disassoc(dev, ifsta, mgmt, skb->len);
3007 break;
9f985b0e 3008 case IEEE80211_STYPE_ACTION:
f709fc69 3009 ieee80211_rx_mgmt_action(dev, ifsta, mgmt, skb->len, rx_status);
9f985b0e 3010 break;
f0706e82
JB		 3011 }
3012
3013 kfree_skb(skb);
3014}
3015
3016
9ae54c84 3017ieee80211_rx_result
ece8eddd
ZY		 3018ieee80211_sta_rx_scan(struct net_device *dev, struct sk_buff *skb,
3019 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 3020{
3021 struct ieee80211_mgmt *mgmt;
3022 u16 fc;
3023
ece8eddd 3024 if (skb->len < 2)
e4c26add 3025 return RX_DROP_UNUSABLE;
f0706e82
JB		 3026
3027 mgmt = (struct ieee80211_mgmt *) skb->data;
3028 fc = le16_to_cpu(mgmt->frame_control);
3029
ece8eddd 3030 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL)
9ae54c84 3031 return RX_CONTINUE;
ece8eddd
ZY		 3032
3033 if (skb->len < 24)
e4c26add 3034 return RX_DROP_MONITOR;
ece8eddd 3035
f0706e82
JB		 3036 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
3037 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP) {
3038 ieee80211_rx_mgmt_probe_resp(dev, mgmt,
3039 skb->len, rx_status);
ece8eddd 3040 dev_kfree_skb(skb);
9ae54c84 3041 return RX_QUEUED;
f0706e82
JB		 3042 } else if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) {
3043 ieee80211_rx_mgmt_beacon(dev, mgmt, skb->len,
3044 rx_status);
ece8eddd 3045 dev_kfree_skb(skb);
9ae54c84 3046 return RX_QUEUED;
f0706e82
JB		 3047 }
3048 }
9ae54c84 3049 return RX_CONTINUE;
f0706e82
JB		 3050}
3051
3052
3053static int ieee80211_sta_active_ibss(struct net_device *dev)
3054{
3055 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3056 int active = 0;
3057 struct sta_info *sta;
d0709a65 3058 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3059
d0709a65
JB		 3060 rcu_read_lock();
3061
3062 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3063 if (sta->sdata == sdata &&
f0706e82
JB		 3064 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3065 jiffies)) {
3066 active++;
3067 break;
3068 }
3069 }
d0709a65
JB		 3070
3071 rcu_read_unlock();
f0706e82
JB		 3072
3073 return active;
3074}
3075
3076
f709fc69 3077static void ieee80211_sta_expire(struct net_device *dev, unsigned long exp_time)
f0706e82
JB		 3078{
3079 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3080 struct sta_info *sta, *tmp;
be8755e1 3081 LIST_HEAD(tmp_list);
0795af57 3082 DECLARE_MAC_BUF(mac);
d0709a65 3083 unsigned long flags;
f0706e82 3084
d0709a65 3085 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3086 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3087 if (time_after(jiffies, sta->last_rx + exp_time)) {
0795af57
JP		 3088 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
3089 dev->name, print_mac(mac, sta->addr));
cb585bcc 3090 __sta_info_unlink(&sta);
d0709a65
JB		 3091 if (sta)
3092 list_add(&sta->list, &tmp_list);
f0706e82 3093 }
d0709a65 3094 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3095
d0709a65
JB		 3096 synchronize_rcu();
3097
3098 rtnl_lock();
3099 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3100 sta_info_destroy(sta);
3101 rtnl_unlock();
f0706e82
JB		 3102}
3103
3104
3105static void ieee80211_sta_merge_ibss(struct net_device *dev,
3106 struct ieee80211_if_sta *ifsta)
3107{
3108 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3109
f709fc69 3110 ieee80211_sta_expire(dev, IEEE80211_IBSS_INACTIVITY_LIMIT);
f0706e82
JB		 3111 if (ieee80211_sta_active_ibss(dev))
3112 return;
3113
3114 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
3115 "IBSS networks with same SSID (merge)\n", dev->name);
3116 ieee80211_sta_req_scan(dev, ifsta->ssid, ifsta->ssid_len);
3117}
3118
3119
f709fc69
LCC		 3120#ifdef CONFIG_MAC80211_MESH
3121static void ieee80211_mesh_housekeeping(struct net_device *dev,
3122 struct ieee80211_if_sta *ifsta)
3123{
3124 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3125 bool free_plinks;
3126
3127 ieee80211_sta_expire(dev, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3128 mesh_path_expire(dev);
3129
3130 free_plinks = mesh_plink_availables(sdata);
3131 if (free_plinks != sdata->u.sta.accepting_plinks)
3132 ieee80211_if_config_beacon(dev);
3133
3134 mod_timer(&ifsta->timer, jiffies +
3135 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3136}
3137
3138
3139void ieee80211_start_mesh(struct net_device *dev)
3140{
3141 struct ieee80211_if_sta *ifsta;
3142 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3143 ifsta = &sdata->u.sta;
3144 ifsta->state = IEEE80211_MESH_UP;
3145 ieee80211_sta_timer((unsigned long)sdata);
3146}
3147#endif
3148
3149
f0706e82
JB		 3150void ieee80211_sta_timer(unsigned long data)
3151{
3152 struct ieee80211_sub_if_data *sdata =
3153 (struct ieee80211_sub_if_data *) data;
3154 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3155 struct ieee80211_local *local = wdev_priv(&sdata->wdev);
3156
3157 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3158 queue_work(local->hw.workqueue, &ifsta->work);
3159}
3160
f0706e82
JB		 3161void ieee80211_sta_work(struct work_struct *work)
3162{
3163 struct ieee80211_sub_if_data *sdata =
3164 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3165 struct net_device *dev = sdata->dev;
3166 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3167 struct ieee80211_if_sta *ifsta;
3168 struct sk_buff *skb;
3169
3170 if (!netif_running(dev))
3171 return;
3172
ece8eddd 3173 if (local->sta_sw_scanning || local->sta_hw_scanning)
f0706e82
JB		 3174 return;
3175
51fb61e7 3176 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
f709fc69
LCC		 3177 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3178 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT) {
f0706e82 3179 printk(KERN_DEBUG "%s: ieee80211_sta_work: non-STA interface "
51fb61e7 3180 "(type=%d)\n", dev->name, sdata->vif.type);
f0706e82
JB		 3181 return;
3182 }
3183 ifsta = &sdata->u.sta;
3184
3185 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3186 ieee80211_sta_rx_queued_mgmt(dev, skb);
3187
f709fc69 3188#ifdef CONFIG_MAC80211_MESH
902acc78
JB		 3189 if (ifsta->preq_queue_len &&
3190 time_after(jiffies,
3191 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
f709fc69
LCC		 3192 mesh_path_start_discovery(dev);
3193#endif
3194
f0706e82
JB		 3195 if (ifsta->state != IEEE80211_AUTHENTICATE &&
3196 ifsta->state != IEEE80211_ASSOCIATE &&
3197 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
a0af5f14
HS		 3198 if (ifsta->scan_ssid_len)
3199 ieee80211_sta_start_scan(dev, ifsta->scan_ssid, ifsta->scan_ssid_len);
3200 else
3201 ieee80211_sta_start_scan(dev, NULL, 0);
f0706e82
JB		 3202 return;
3203 }
3204
3205 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3206 if (ieee80211_sta_config_auth(dev, ifsta))
3207 return;
3208 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3209 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3210 return;
3211
3212 switch (ifsta->state) {
3213 case IEEE80211_DISABLED:
3214 break;
3215 case IEEE80211_AUTHENTICATE:
3216 ieee80211_authenticate(dev, ifsta);
3217 break;
3218 case IEEE80211_ASSOCIATE:
3219 ieee80211_associate(dev, ifsta);
3220 break;
3221 case IEEE80211_ASSOCIATED:
3222 ieee80211_associated(dev, ifsta);
3223 break;
3224 case IEEE80211_IBSS_SEARCH:
3225 ieee80211_sta_find_ibss(dev, ifsta);
3226 break;
3227 case IEEE80211_IBSS_JOINED:
3228 ieee80211_sta_merge_ibss(dev, ifsta);
3229 break;
f709fc69
LCC		 3230#ifdef CONFIG_MAC80211_MESH
3231 case IEEE80211_MESH_UP:
3232 ieee80211_mesh_housekeeping(dev, ifsta);
3233 break;
3234#endif
f0706e82
JB		 3235 default:
3236 printk(KERN_DEBUG "ieee80211_sta_work: Unknown state %d\n",
3237 ifsta->state);
3238 break;
3239 }
3240
3241 if (ieee80211_privacy_mismatch(dev, ifsta)) {
3242 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3243 "mixed-cell disabled - disassociate\n", dev->name);
3244
3245 ieee80211_send_disassoc(dev, ifsta, WLAN_REASON_UNSPECIFIED);
3246 ieee80211_set_disassoc(dev, ifsta, 0);
3247 }
3248}
3249
3250
3251static void ieee80211_sta_reset_auth(struct net_device *dev,
3252 struct ieee80211_if_sta *ifsta)
3253{
3254 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3255
3256 if (local->ops->reset_tsf) {
3257 /* Reset own TSF to allow time synchronization work. */
3258 local->ops->reset_tsf(local_to_hw(local));
3259 }
3260
3261 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3262
3263
3264 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3265 ifsta->auth_alg = WLAN_AUTH_OPEN;
3266 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3267 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3268 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3269 ifsta->auth_alg = WLAN_AUTH_LEAP;
3270 else
3271 ifsta->auth_alg = WLAN_AUTH_OPEN;
3272 printk(KERN_DEBUG "%s: Initial auth_alg=%d\n", dev->name,
3273 ifsta->auth_alg);
3274 ifsta->auth_transaction = -1;
d6f2da5b
JS		 3275 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
3276 ifsta->auth_tries = ifsta->assoc_tries = 0;
f0706e82
JB		 3277 netif_carrier_off(dev);
3278}
3279
3280
3281void ieee80211_sta_req_auth(struct net_device *dev,
3282 struct ieee80211_if_sta *ifsta)
3283{
3284 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3285 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3286
51fb61e7 3287 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3288 return;
3289
d6f2da5b
JS		 3290 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3291 IEEE80211_STA_AUTO_BSSID_SEL)) &&
3292 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3293 IEEE80211_STA_AUTO_SSID_SEL))) {
f0706e82
JB		 3294 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3295 queue_work(local->hw.workqueue, &ifsta->work);
3296 }
3297}
3298
3299static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3300 const char *ssid, int ssid_len)
3301{
3302 int tmp, hidden_ssid;
3303
48225709
MW		 3304 if (ssid_len == ifsta->ssid_len &&
3305 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3306 return 1;
3307
d6f2da5b 3308 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3309 return 0;
3310
3311 hidden_ssid = 1;
3312 tmp = ssid_len;
3313 while (tmp--) {
3314 if (ssid[tmp] != '\0') {
3315 hidden_ssid = 0;
3316 break;
3317 }
3318 }
3319
3320 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3321 return 1;
3322
3323 if (ssid_len == 1 && ssid[0] == ' ')
3324 return 1;
3325
3326 return 0;
3327}
3328
3329static int ieee80211_sta_config_auth(struct net_device *dev,
3330 struct ieee80211_if_sta *ifsta)
3331{
3332 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3333 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3334 struct ieee80211_sta_bss *bss, *selected = NULL;
3335 int top_rssi = 0, freq;
3336
d6f2da5b
JS		 3337 if (!(ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3338 IEEE80211_STA_AUTO_BSSID_SEL | IEEE80211_STA_AUTO_CHANNEL_SEL))) {
f0706e82 3339 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3340 ieee80211_sta_reset_auth(dev, ifsta);
3341 return 0;
3342 }
3343
3344 spin_lock_bh(&local->sta_bss_lock);
8318d78a 3345 freq = local->oper_channel->center_freq;
f0706e82
JB		 3346 list_for_each_entry(bss, &local->sta_bss_list, list) {
3347 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3348 continue;
3349
3350 if (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3351 !!sdata->default_key)
3352 continue;
3353
d6f2da5b
JS		 3354 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3355 bss->freq != freq)
f0706e82
JB		 3356 continue;
3357
d6f2da5b 3358 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
f0706e82
JB		 3359 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3360 continue;
3361
d6f2da5b 3362 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
f0706e82
JB		 3363 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3364 continue;
3365
3366 if (!selected || top_rssi < bss->rssi) {
3367 selected = bss;
3368 top_rssi = bss->rssi;
3369 }
3370 }
3371 if (selected)
3372 atomic_inc(&selected->users);
3373 spin_unlock_bh(&local->sta_bss_lock);
3374
3375 if (selected) {
8318d78a 3376 ieee80211_set_freq(local, selected->freq);
d6f2da5b 3377 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
f0706e82
JB		 3378 ieee80211_sta_set_ssid(dev, selected->ssid,
3379 selected->ssid_len);
3380 ieee80211_sta_set_bssid(dev, selected->bssid);
e2839d8f 3381 ieee80211_sta_def_wmm_params(dev, selected, 0);
f0706e82
JB		 3382 ieee80211_rx_bss_put(dev, selected);
3383 ifsta->state = IEEE80211_AUTHENTICATE;
f0706e82
JB		 3384 ieee80211_sta_reset_auth(dev, ifsta);
3385 return 0;
3386 } else {
3387 if (ifsta->state != IEEE80211_AUTHENTICATE) {
d6f2da5b 3388 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
b9bf1e60
JL		 3389 ieee80211_sta_start_scan(dev, NULL, 0);
3390 else
3391 ieee80211_sta_start_scan(dev, ifsta->ssid,
3392 ifsta->ssid_len);
f0706e82
JB		 3393 ifsta->state = IEEE80211_AUTHENTICATE;
3394 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3395 } else
3396 ifsta->state = IEEE80211_DISABLED;
3397 }
f0706e82
JB		 3398 return -1;
3399}
3400
f0706e82
JB		 3401
3402static int ieee80211_sta_create_ibss(struct net_device *dev,
3403 struct ieee80211_if_sta *ifsta)
3404{
3405 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3406 struct ieee80211_sta_bss *bss;
cffdd30d 3407 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3408 struct ieee80211_supported_band *sband;
f0706e82
JB		 3409 u8 bssid[ETH_ALEN], *pos;
3410 int i;
0795af57 3411 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3412
3413#if 0
3414 /* Easier testing, use fixed BSSID. */
3415 memset(bssid, 0xfe, ETH_ALEN);
3416#else
3417 /* Generate random, not broadcast, locally administered BSSID. Mix in
3418 * own MAC address to make sure that devices that do not have proper
3419 * random number generator get different BSSID. */
3420 get_random_bytes(bssid, ETH_ALEN);
3421 for (i = 0; i < ETH_ALEN; i++)
3422 bssid[i] ^= dev->dev_addr[i];
3423 bssid[0] &= ~0x01;
3424 bssid[0] |= 0x02;
3425#endif
3426
0795af57
JP		 3427 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
3428 dev->name, print_mac(mac, bssid));
f0706e82 3429
8318d78a
JB		 3430 bss = ieee80211_rx_bss_add(dev, bssid,
3431 local->hw.conf.channel->center_freq,
cffdd30d 3432 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3433 if (!bss)
3434 return -ENOMEM;
3435
8318d78a
JB		 3436 bss->band = local->hw.conf.channel->band;
3437 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3438
3439 if (local->hw.conf.beacon_int == 0)
f709fc69 3440 local->hw.conf.beacon_int = 10000;
f0706e82 3441 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3442 bss->last_update = jiffies;
3443 bss->capability = WLAN_CAPABILITY_IBSS;
3444 if (sdata->default_key) {
3445 bss->capability |= WLAN_CAPABILITY_PRIVACY;
3446 } else
3447 sdata->drop_unencrypted = 0;
8318d78a 3448 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3449 pos = bss->supp_rates;
8318d78a
JB		 3450 for (i = 0; i < sband->n_bitrates; i++) {
3451 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3452 *pos++ = (u8) (rate / 5);
3453 }
3454
3455 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3456}
3457
3458
3459static int ieee80211_sta_find_ibss(struct net_device *dev,
3460 struct ieee80211_if_sta *ifsta)
3461{
3462 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3463 struct ieee80211_sta_bss *bss;
3464 int found = 0;
3465 u8 bssid[ETH_ALEN];
3466 int active_ibss;
0795af57
JP		 3467 DECLARE_MAC_BUF(mac);
3468 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3469
3470 if (ifsta->ssid_len == 0)
3471 return -EINVAL;
3472
3473 active_ibss = ieee80211_sta_active_ibss(dev);
3474#ifdef CONFIG_MAC80211_IBSS_DEBUG
3475 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
3476 dev->name, active_ibss);
3477#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3478 spin_lock_bh(&local->sta_bss_lock);
3479 list_for_each_entry(bss, &local->sta_bss_list, list) {
3480 if (ifsta->ssid_len != bss->ssid_len ||
3481 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3482 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3483 continue;
3484#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3485 printk(KERN_DEBUG " bssid=%s found\n",
3486 print_mac(mac, bss->bssid));
f0706e82
JB		 3487#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3488 memcpy(bssid, bss->bssid, ETH_ALEN);
3489 found = 1;
3490 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3491 break;
3492 }
3493 spin_unlock_bh(&local->sta_bss_lock);
3494
3495#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3496 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3497 "%s\n", print_mac(mac, bssid), print_mac(mac2, ifsta->bssid));
f0706e82
JB		 3498#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3499 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0 &&
8318d78a
JB		 3500 (bss = ieee80211_rx_bss_get(dev, bssid,
3501 local->hw.conf.channel->center_freq,
cffdd30d 3502 ifsta->ssid, ifsta->ssid_len))) {
0795af57 3503 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3504 " based on configured SSID\n",
0795af57 3505 dev->name, print_mac(mac, bssid));
f0706e82
JB		 3506 return ieee80211_sta_join_ibss(dev, ifsta, bss);
3507 }
3508#ifdef CONFIG_MAC80211_IBSS_DEBUG
3509 printk(KERN_DEBUG " did not try to join ibss\n");
3510#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3511
3512 /* Selected IBSS not found in current scan results - try to scan */
3513 if (ifsta->state == IEEE80211_IBSS_JOINED &&
3514 !ieee80211_sta_active_ibss(dev)) {
3515 mod_timer(&ifsta->timer, jiffies +
3516 IEEE80211_IBSS_MERGE_INTERVAL);
3517 } else if (time_after(jiffies, local->last_scan_completed +
3518 IEEE80211_SCAN_INTERVAL)) {
3519 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
3520 "join\n", dev->name);
3521 return ieee80211_sta_req_scan(dev, ifsta->ssid,
3522 ifsta->ssid_len);
3523 } else if (ifsta->state != IEEE80211_IBSS_JOINED) {
3524 int interval = IEEE80211_SCAN_INTERVAL;
3525
3526 if (time_after(jiffies, ifsta->ibss_join_req +
3527 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3528 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3529 (!(local->oper_channel->flags &
3530 IEEE80211_CHAN_NO_IBSS)))
f0706e82 3531 return ieee80211_sta_create_ibss(dev, ifsta);
d6f2da5b 3532 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a
JB		 3533 printk(KERN_DEBUG "%s: IBSS not allowed on"
3534 " %d MHz\n", dev->name,
3535 local->hw.conf.channel->center_freq);
f0706e82
JB		 3536 }
3537
3538 /* No IBSS found - decrease scan interval and continue
3539 * scanning. */
3540 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3541 }
3542
3543 ifsta->state = IEEE80211_IBSS_SEARCH;
3544 mod_timer(&ifsta->timer, jiffies + interval);
3545 return 0;
3546 }
3547
3548 return 0;
3549}
3550
3551
3552int ieee80211_sta_set_ssid(struct net_device *dev, char *ssid, size_t len)
3553{
8318d78a 3554 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
f0706e82 3555 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 3556
3557 if (len > IEEE80211_MAX_SSID_LEN)
3558 return -EINVAL;
3559
f0706e82
JB		 3560 ifsta = &sdata->u.sta;
3561
3562 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0)
d6f2da5b 3563 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 3564 memcpy(ifsta->ssid, ssid, len);
3565 memset(ifsta->ssid + len, 0, IEEE80211_MAX_SSID_LEN - len);
3566 ifsta->ssid_len = len;
3567
d6f2da5b
JS		 3568 if (len)
3569 ifsta->flags |= IEEE80211_STA_SSID_SET;
3570 else
3571 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
51fb61e7 3572 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3573 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82
JB		 3574 ifsta->ibss_join_req = jiffies;
3575 ifsta->state = IEEE80211_IBSS_SEARCH;
3576 return ieee80211_sta_find_ibss(dev, ifsta);
3577 }
3578 return 0;
3579}
3580
3581
3582int ieee80211_sta_get_ssid(struct net_device *dev, char *ssid, size_t *len)
3583{
3584 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3585 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3586 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3587 *len = ifsta->ssid_len;
3588 return 0;
3589}
3590
3591
3592int ieee80211_sta_set_bssid(struct net_device *dev, u8 *bssid)
3593{
3594 struct ieee80211_sub_if_data *sdata;
3595 struct ieee80211_if_sta *ifsta;
3596 int res;
3597
3598 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3599 ifsta = &sdata->u.sta;
3600
3601 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3602 memcpy(ifsta->bssid, bssid, ETH_ALEN);
3603 res = ieee80211_if_config(dev);
3604 if (res) {
3605 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
3606 "the low-level driver\n", dev->name);
3607 return res;
3608 }
3609 }
3610
d6f2da5b
JS		 3611 if (is_valid_ether_addr(bssid))
3612 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3613 else
d6f2da5b
JS		 3614 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3615
f0706e82
JB		 3616 return 0;
3617}
3618
3619
3620static void ieee80211_send_nullfunc(struct ieee80211_local *local,
3621 struct ieee80211_sub_if_data *sdata,
3622 int powersave)
3623{
3624 struct sk_buff *skb;
3625 struct ieee80211_hdr *nullfunc;
3626 u16 fc;
3627
3628 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24);
3629 if (!skb) {
3630 printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc "
3631 "frame\n", sdata->dev->name);
3632 return;
3633 }
3634 skb_reserve(skb, local->hw.extra_tx_headroom);
3635
3636 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 24);
3637 memset(nullfunc, 0, 24);
3638 fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
3639 IEEE80211_FCTL_TODS;
3640 if (powersave)
3641 fc |= IEEE80211_FCTL_PM;
3642 nullfunc->frame_control = cpu_to_le16(fc);
3643 memcpy(nullfunc->addr1, sdata->u.sta.bssid, ETH_ALEN);
3644 memcpy(nullfunc->addr2, sdata->dev->dev_addr, ETH_ALEN);
3645 memcpy(nullfunc->addr3, sdata->u.sta.bssid, ETH_ALEN);
3646
3647 ieee80211_sta_tx(sdata->dev, skb, 0);
3648}
3649
3650
69d3b6f4
JB		 3651static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3652{
3653 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
3654 ieee80211_vif_is_mesh(&sdata->vif))
3655 ieee80211_sta_timer((unsigned long)sdata);
3656}
3657
f0706e82
JB		 3658void ieee80211_scan_completed(struct ieee80211_hw *hw)
3659{
3660 struct ieee80211_local *local = hw_to_local(hw);
3661 struct net_device *dev = local->scan_dev;
3662 struct ieee80211_sub_if_data *sdata;
3663 union iwreq_data wrqu;
3664
3665 local->last_scan_completed = jiffies;
ece8eddd
ZY		 3666 memset(&wrqu, 0, sizeof(wrqu));
3667 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
f0706e82 3668
ece8eddd
ZY		 3669 if (local->sta_hw_scanning) {
3670 local->sta_hw_scanning = 0;
675ef586
MA		 3671 if (ieee80211_hw_config(local))
3672 printk(KERN_DEBUG "%s: failed to restore operational "
3673 "channel after scan\n", dev->name);
69d3b6f4
JB		 3674 /* Restart STA timer for HW scan case */
3675 rcu_read_lock();
3676 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3677 ieee80211_restart_sta_timer(sdata);
3678 rcu_read_unlock();
3679
ece8eddd
ZY		 3680 goto done;
3681 }
3682
3683 local->sta_sw_scanning = 0;
f0706e82 3684 if (ieee80211_hw_config(local))
4b50e388 3685 printk(KERN_DEBUG "%s: failed to restore operational "
f0706e82
JB		 3686 "channel after scan\n", dev->name);
3687
4150c572
JB		 3688
3689 netif_tx_lock_bh(local->mdev);
3690 local->filter_flags &= ~FIF_BCN_PRBRESP_PROMISC;
3691 local->ops->configure_filter(local_to_hw(local),
3692 FIF_BCN_PRBRESP_PROMISC,
3693 &local->filter_flags,
3694 local->mdev->mc_count,
3695 local->mdev->mc_list);
3696
3697 netif_tx_unlock_bh(local->mdev);
f0706e82 3698
79010420
JB		 3699 rcu_read_lock();
3700 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3701
3702 /* No need to wake the master device. */
3703 if (sdata->dev == local->mdev)
3704 continue;
3705
69d3b6f4
JB		 3706 /* Tell AP we're back */
3707 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
3708 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED)
3709 ieee80211_send_nullfunc(local, sdata, 0);
14042cbe 3710
69d3b6f4 3711 ieee80211_restart_sta_timer(sdata);
f709fc69 3712
f0706e82
JB		 3713 netif_wake_queue(sdata->dev);
3714 }
79010420 3715 rcu_read_unlock();
f0706e82 3716
ece8eddd 3717done:
f0706e82 3718 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
51fb61e7 3719 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
f0706e82 3720 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
d6f2da5b 3721 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
f0706e82
JB		 3722 (!ifsta->state == IEEE80211_IBSS_JOINED &&
3723 !ieee80211_sta_active_ibss(dev)))
3724 ieee80211_sta_find_ibss(dev, ifsta);
3725 }
3726}
3727EXPORT_SYMBOL(ieee80211_scan_completed);
3728
3729void ieee80211_sta_scan_work(struct work_struct *work)
3730{
3731 struct ieee80211_local *local =
3732 container_of(work, struct ieee80211_local, scan_work.work);
3733 struct net_device *dev = local->scan_dev;
3734 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
8318d78a 3735 struct ieee80211_supported_band *sband;
f0706e82
JB		 3736 struct ieee80211_channel *chan;
3737 int skip;
3738 unsigned long next_delay = 0;
3739
ece8eddd 3740 if (!local->sta_sw_scanning)
f0706e82
JB		 3741 return;
3742
3743 switch (local->scan_state) {
3744 case SCAN_SET_CHANNEL:
69d464d5
JB		 3745 /*
3746 * Get current scan band. scan_band may be IEEE80211_NUM_BANDS
3747 * after we successfully scanned the last channel of the last
3748 * band (and the last band is supported by the hw)
3749 */
8318d78a
JB		 3750 if (local->scan_band < IEEE80211_NUM_BANDS)
3751 sband = local->hw.wiphy->bands[local->scan_band];
3752 else
3753 sband = NULL;
3754
69d464d5
JB		 3755 /*
3756 * If we are at an unsupported band and have more bands
3757 * left to scan, advance to the next supported one.
3758 */
3759 while (!sband && local->scan_band < IEEE80211_NUM_BANDS - 1) {
8318d78a
JB		 3760 local->scan_band++;
3761 sband = local->hw.wiphy->bands[local->scan_band];
3762 local->scan_channel_idx = 0;
3763 }
3764
69d464d5
JB		 3765 /* if no more bands/channels left, complete scan */
3766 if (!sband || local->scan_channel_idx >= sband->n_channels) {
f0706e82
JB		 3767 ieee80211_scan_completed(local_to_hw(local));
3768 return;
3769 }
8318d78a
JB		 3770 skip = 0;
3771 chan = &sband->channels[local->scan_channel_idx];
3772
3773 if (chan->flags & IEEE80211_CHAN_DISABLED ||
51fb61e7 3774 (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
8318d78a 3775 chan->flags & IEEE80211_CHAN_NO_IBSS))
f0706e82
JB		 3776 skip = 1;
3777
3778 if (!skip) {
f0706e82
JB		 3779 local->scan_channel = chan;
3780 if (ieee80211_hw_config(local)) {
8318d78a
JB		 3781 printk(KERN_DEBUG "%s: failed to set freq to "
3782 "%d MHz for scan\n", dev->name,
3783 chan->center_freq);
f0706e82
JB		 3784 skip = 1;
3785 }
3786 }
3787
69d464d5 3788 /* advance state machine to next channel/band */
f0706e82 3789 local->scan_channel_idx++;
8318d78a 3790 if (local->scan_channel_idx >= sband->n_channels) {
69d464d5
JB		 3791 /*
3792 * scan_band may end up == IEEE80211_NUM_BANDS, but
3793 * we'll catch that case above and complete the scan
3794 * if that is the case.
3795 */
8318d78a
JB		 3796 local->scan_band++;
3797 local->scan_channel_idx = 0;
f0706e82
JB		 3798 }
3799
3800 if (skip)
3801 break;
3802
3803 next_delay = IEEE80211_PROBE_DELAY +
3804 usecs_to_jiffies(local->hw.channel_change_time);
3805 local->scan_state = SCAN_SEND_PROBE;
3806 break;
3807 case SCAN_SEND_PROBE:
8318d78a 3808 next_delay = IEEE80211_PASSIVE_CHANNEL_TIME;
f0706e82 3809 local->scan_state = SCAN_SET_CHANNEL;
8318d78a
JB		 3810
3811 if (local->scan_channel->flags & IEEE80211_CHAN_PASSIVE_SCAN)
3812 break;
3813 ieee80211_send_probe_req(dev, NULL, local->scan_ssid,
3814 local->scan_ssid_len);
3815 next_delay = IEEE80211_CHANNEL_TIME;
f0706e82
JB		 3816 break;
3817 }
3818
ece8eddd 3819 if (local->sta_sw_scanning)
f0706e82
JB		 3820 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3821 next_delay);
3822}
3823
3824
3825static int ieee80211_sta_start_scan(struct net_device *dev,
3826 u8 *ssid, size_t ssid_len)
3827{
3828 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3829 struct ieee80211_sub_if_data *sdata;
3830
3831 if (ssid_len > IEEE80211_MAX_SSID_LEN)
3832 return -EINVAL;
3833
3834 /* MLME-SCAN.request (page 118) page 144 (11.1.3.1)
3835 * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
3836 * BSSID: MACAddress
3837 * SSID
3838 * ScanType: ACTIVE, PASSIVE
3839 * ProbeDelay: delay (in microseconds) to be used prior to transmitting
3840 * a Probe frame during active scanning
3841 * ChannelList
3842 * MinChannelTime (>= ProbeDelay), in TU
3843 * MaxChannelTime: (>= MinChannelTime), in TU
3844 */
3845
3846 /* MLME-SCAN.confirm
3847 * BSSDescriptionSet
3848 * ResultCode: SUCCESS, INVALID_PARAMETERS
3849 */
3850
ece8eddd 3851 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3852 if (local->scan_dev == dev)
3853 return 0;
3854 return -EBUSY;
3855 }
3856
3857 if (local->ops->hw_scan) {
3858 int rc = local->ops->hw_scan(local_to_hw(local),
ece8eddd 3859 ssid, ssid_len);
f0706e82 3860 if (!rc) {
ece8eddd 3861 local->sta_hw_scanning = 1;
f0706e82
JB		 3862 local->scan_dev = dev;
3863 }
3864 return rc;
3865 }
3866
ece8eddd 3867 local->sta_sw_scanning = 1;
f0706e82 3868
79010420
JB		 3869 rcu_read_lock();
3870 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
14042cbe
MN		 3871
3872 /* Don't stop the master interface, otherwise we can't transmit
3873 * probes! */
3874 if (sdata->dev == local->mdev)
3875 continue;
3876
f0706e82 3877 netif_stop_queue(sdata->dev);
51fb61e7 3878 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
d6f2da5b 3879 (sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3880 ieee80211_send_nullfunc(local, sdata, 1);
3881 }
79010420 3882 rcu_read_unlock();
f0706e82
JB		 3883
3884 if (ssid) {
3885 local->scan_ssid_len = ssid_len;
3886 memcpy(local->scan_ssid, ssid, ssid_len);
3887 } else
3888 local->scan_ssid_len = 0;
3889 local->scan_state = SCAN_SET_CHANNEL;
f0706e82 3890 local->scan_channel_idx = 0;
8318d78a 3891 local->scan_band = IEEE80211_BAND_2GHZ;
f0706e82
JB		 3892 local->scan_dev = dev;
3893
4150c572
JB		 3894 netif_tx_lock_bh(local->mdev);
3895 local->filter_flags |= FIF_BCN_PRBRESP_PROMISC;
3896 local->ops->configure_filter(local_to_hw(local),
3897 FIF_BCN_PRBRESP_PROMISC,
3898 &local->filter_flags,
3899 local->mdev->mc_count,
3900 local->mdev->mc_list);
3901 netif_tx_unlock_bh(local->mdev);
f0706e82
JB		 3902
3903 /* TODO: start scan as soon as all nullfunc frames are ACKed */
3904 queue_delayed_work(local->hw.workqueue, &local->scan_work,
3905 IEEE80211_CHANNEL_TIME);
3906
3907 return 0;
3908}
3909
3910
3911int ieee80211_sta_req_scan(struct net_device *dev, u8 *ssid, size_t ssid_len)
3912{
3913 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3914 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3915 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3916
51fb61e7 3917 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3918 return ieee80211_sta_start_scan(dev, ssid, ssid_len);
3919
ece8eddd 3920 if (local->sta_sw_scanning || local->sta_hw_scanning) {
f0706e82
JB		 3921 if (local->scan_dev == dev)
3922 return 0;
3923 return -EBUSY;
3924 }
3925
a0af5f14
HS		 3926 ifsta->scan_ssid_len = ssid_len;
3927 if (ssid_len)
3928 memcpy(ifsta->scan_ssid, ssid, ssid_len);
f0706e82
JB		 3929 set_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request);
3930 queue_work(local->hw.workqueue, &ifsta->work);
3931 return 0;
3932}
3933
3934static char *
3935ieee80211_sta_scan_result(struct net_device *dev,
3936 struct ieee80211_sta_bss *bss,
3937 char *current_ev, char *end_buf)
3938{
3939 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
3940 struct iw_event iwe;
3941
3942 if (time_after(jiffies,
3943 bss->last_update + IEEE80211_SCAN_RESULT_EXPIRE))
3944 return current_ev;
3945
f0706e82
JB		 3946 memset(&iwe, 0, sizeof(iwe));
3947 iwe.cmd = SIOCGIWAP;
3948 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
3949 memcpy(iwe.u.ap_addr.sa_data, bss->bssid, ETH_ALEN);
3950 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3951 IW_EV_ADDR_LEN);
3952
3953 memset(&iwe, 0, sizeof(iwe));
3954 iwe.cmd = SIOCGIWESSID;
902acc78
JB		 3955 if (bss_mesh_cfg(bss)) {
3956 iwe.u.data.length = bss_mesh_id_len(bss);
f709fc69
LCC		 3957 iwe.u.data.flags = 1;
3958 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
902acc78 3959 bss_mesh_id(bss));
f709fc69
LCC		 3960 } else {
3961 iwe.u.data.length = bss->ssid_len;
3962 iwe.u.data.flags = 1;
3963 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
3964 bss->ssid);
3965 }
f0706e82 3966
1d1b5359
LCC		 3967 if (bss->capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS)
3968 || bss_mesh_cfg(bss)) {
f0706e82
JB		 3969 memset(&iwe, 0, sizeof(iwe));
3970 iwe.cmd = SIOCGIWMODE;
902acc78 3971 if (bss_mesh_cfg(bss))
f709fc69
LCC		 3972 iwe.u.mode = IW_MODE_MESH;
3973 else if (bss->capability & WLAN_CAPABILITY_ESS)
f0706e82
JB		 3974 iwe.u.mode = IW_MODE_MASTER;
3975 else
3976 iwe.u.mode = IW_MODE_ADHOC;
3977 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3978 IW_EV_UINT_LEN);
3979 }
3980
3981 memset(&iwe, 0, sizeof(iwe));
3982 iwe.cmd = SIOCGIWFREQ;
8318d78a
JB		 3983 iwe.u.freq.m = bss->freq;
3984 iwe.u.freq.e = 6;
f0706e82
JB		 3985 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3986 IW_EV_FREQ_LEN);
8318d78a
JB		 3987
3988 memset(&iwe, 0, sizeof(iwe));
3989 iwe.cmd = SIOCGIWFREQ;
3990 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->freq);
3991 iwe.u.freq.e = 0;
f0706e82
JB		 3992 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
3993 IW_EV_FREQ_LEN);
3994
3995 memset(&iwe, 0, sizeof(iwe));
3996 iwe.cmd = IWEVQUAL;
3997 iwe.u.qual.qual = bss->signal;
3998 iwe.u.qual.level = bss->rssi;
3999 iwe.u.qual.noise = bss->noise;
4000 iwe.u.qual.updated = local->wstats_flags;
4001 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe,
4002 IW_EV_QUAL_LEN);
4003
4004 memset(&iwe, 0, sizeof(iwe));
4005 iwe.cmd = SIOCGIWENCODE;
4006 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
4007 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
4008 else
4009 iwe.u.data.flags = IW_ENCODE_DISABLED;
4010 iwe.u.data.length = 0;
4011 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, "");
4012
4013 if (bss && bss->wpa_ie) {
4014 memset(&iwe, 0, sizeof(iwe));
4015 iwe.cmd = IWEVGENIE;
4016 iwe.u.data.length = bss->wpa_ie_len;
4017 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4018 bss->wpa_ie);
4019 }
4020
4021 if (bss && bss->rsn_ie) {
4022 memset(&iwe, 0, sizeof(iwe));
4023 iwe.cmd = IWEVGENIE;
4024 iwe.u.data.length = bss->rsn_ie_len;
4025 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
4026 bss->rsn_ie);
4027 }
4028
4029 if (bss && bss->supp_rates_len > 0) {
4030 /* display all supported rates in readable format */
4031 char *p = current_ev + IW_EV_LCP_LEN;
4032 int i;
4033
4034 memset(&iwe, 0, sizeof(iwe));
4035 iwe.cmd = SIOCGIWRATE;
4036 /* Those two flags are ignored... */
4037 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
4038
4039 for (i = 0; i < bss->supp_rates_len; i++) {
4040 iwe.u.bitrate.value = ((bss->supp_rates[i] &
4041 0x7f) * 500000);
4042 p = iwe_stream_add_value(current_ev, p,
4043 end_buf, &iwe, IW_EV_PARAM_LEN);
4044 }
4045 current_ev = p;
4046 }
4047
4048 if (bss) {
4049 char *buf;
4050 buf = kmalloc(30, GFP_ATOMIC);
4051 if (buf) {
4052 memset(&iwe, 0, sizeof(iwe));
4053 iwe.cmd = IWEVCUSTOM;
4054 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->timestamp));
4055 iwe.u.data.length = strlen(buf);
4056 current_ev = iwe_stream_add_point(current_ev, end_buf,
4057 &iwe, buf);
4058 kfree(buf);
4059 }
4060 }
4061
902acc78 4062 if (bss_mesh_cfg(bss)) {
f709fc69 4063 char *buf;
24736701 4064 u8 *cfg = bss_mesh_cfg(bss);
4f5d4c4d 4065 buf = kmalloc(50, GFP_ATOMIC);
f709fc69
LCC		 4066 if (buf) {
4067 memset(&iwe, 0, sizeof(iwe));
4068 iwe.cmd = IWEVCUSTOM;
24736701 4069 sprintf(buf, "Mesh network (version %d)", cfg[0]);
4f5d4c4d
LCC		 4070 iwe.u.data.length = strlen(buf);
4071 current_ev = iwe_stream_add_point(current_ev, end_buf,
4072 &iwe, buf);
4073 sprintf(buf, "Path Selection Protocol ID: "
24736701
JL		 4074 "0x%02X%02X%02X%02X", cfg[1], cfg[2], cfg[3],
4075 cfg[4]);
4f5d4c4d
LCC		 4076 iwe.u.data.length = strlen(buf);
4077 current_ev = iwe_stream_add_point(current_ev, end_buf,
4078 &iwe, buf);
4079 sprintf(buf, "Path Selection Metric ID: "
24736701
JL		 4080 "0x%02X%02X%02X%02X", cfg[5], cfg[6], cfg[7],
4081 cfg[8]);
4f5d4c4d
LCC		 4082 iwe.u.data.length = strlen(buf);
4083 current_ev = iwe_stream_add_point(current_ev, end_buf,
4084 &iwe, buf);
4085 sprintf(buf, "Congestion Control Mode ID: "
24736701
JL		 4086 "0x%02X%02X%02X%02X", cfg[9], cfg[10],
4087 cfg[11], cfg[12]);
4f5d4c4d
LCC		 4088 iwe.u.data.length = strlen(buf);
4089 current_ev = iwe_stream_add_point(current_ev, end_buf,
4090 &iwe, buf);
4091 sprintf(buf, "Channel Precedence: "
24736701
JL		 4092 "0x%02X%02X%02X%02X", cfg[13], cfg[14],
4093 cfg[15], cfg[16]);
f709fc69
LCC		 4094 iwe.u.data.length = strlen(buf);
4095 current_ev = iwe_stream_add_point(current_ev, end_buf,
4096 &iwe, buf);
4097 kfree(buf);
4098 }
4099 }
4100
f0706e82
JB		 4101 return current_ev;
4102}
4103
4104
4105int ieee80211_sta_scan_results(struct net_device *dev, char *buf, size_t len)
4106{
4107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4108 char *current_ev = buf;
4109 char *end_buf = buf + len;
4110 struct ieee80211_sta_bss *bss;
4111
4112 spin_lock_bh(&local->sta_bss_lock);
4113 list_for_each_entry(bss, &local->sta_bss_list, list) {
4114 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
4115 spin_unlock_bh(&local->sta_bss_lock);
4116 return -E2BIG;
4117 }
4118 current_ev = ieee80211_sta_scan_result(dev, bss, current_ev,
4119 end_buf);
4120 }
4121 spin_unlock_bh(&local->sta_bss_lock);
4122 return current_ev - buf;
4123}
4124
4125
4126int ieee80211_sta_set_extra_ie(struct net_device *dev, char *ie, size_t len)
4127{
4128 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4129 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4130 kfree(ifsta->extra_ie);
4131 if (len == 0) {
4132 ifsta->extra_ie = NULL;
4133 ifsta->extra_ie_len = 0;
4134 return 0;
4135 }
4136 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
4137 if (!ifsta->extra_ie) {
4138 ifsta->extra_ie_len = 0;
4139 return -ENOMEM;
4140 }
4141 memcpy(ifsta->extra_ie, ie, len);
4142 ifsta->extra_ie_len = len;
4143 return 0;
4144}
4145
4146
4147struct sta_info * ieee80211_ibss_add_sta(struct net_device *dev,
4148 struct sk_buff *skb, u8 *bssid,
4149 u8 *addr)
4150{
4151 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
4152 struct sta_info *sta;
91fa558b 4153 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
0795af57 4154 DECLARE_MAC_BUF(mac);
f0706e82
JB		 4155
4156 /* TODO: Could consider removing the least recently used entry and
4157 * allow new one to be added. */
4158 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
4159 if (net_ratelimit()) {
4160 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
0795af57 4161 "entry %s\n", dev->name, print_mac(mac, addr));
f0706e82
JB		 4162 }
4163 return NULL;
4164 }
4165
0795af57 4166 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
dd1cd4c6 4167 wiphy_name(local->hw.wiphy), print_mac(mac, addr), dev->name);
f0706e82 4168
73651ee6
JB		 4169 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
4170 if (!sta)
f0706e82
JB		 4171 return NULL;
4172
238814fd
JB		 4173 sta->flags |= WLAN_STA_AUTHORIZED;
4174
8318d78a
JB		 4175 sta->supp_rates[local->hw.conf.channel->band] =
4176 sdata->u.sta.supp_rates_bits[local->hw.conf.channel->band];
f0706e82
JB		 4177
4178 rate_control_rate_init(sta, local);
4179
93e5deb1 4180 if (sta_info_insert(sta))
73651ee6 4181 return NULL;
73651ee6 4182
d0709a65 4183 return sta;
f0706e82
JB		 4184}
4185
4186
4187int ieee80211_sta_deauthenticate(struct net_device *dev, u16 reason)
4188{
4189 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4190 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4191
4192 printk(KERN_DEBUG "%s: deauthenticate(reason=%d)\n",
4193 dev->name, reason);
4194
51fb61e7
JB		 4195 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
4196 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 4197 return -EINVAL;
4198
4199 ieee80211_send_deauth(dev, ifsta, reason);
4200 ieee80211_set_disassoc(dev, ifsta, 1);
4201 return 0;
4202}
4203
4204
4205int ieee80211_sta_disassociate(struct net_device *dev, u16 reason)
4206{
4207 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4208 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
4209
4210 printk(KERN_DEBUG "%s: disassociate(reason=%d)\n",
4211 dev->name, reason);
4212
51fb61e7 4213 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 4214 return -EINVAL;
4215
d6f2da5b 4216 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 4217 return -1;
4218
4219 ieee80211_send_disassoc(dev, ifsta, reason);
4220 ieee80211_set_disassoc(dev, ifsta, 0);
4221 return 0;
4222}
ubuntu-bionic-kernel mirror