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mac80211: start moving scan code from mlme
[deliverable/linux.git] / net / mac80211 / mlme.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 28#include <net/iw_handler.h>
f0706e82 29#include <net/mac80211.h>
60f8b39c 30
f0706e82 31#include "ieee80211_i.h"
2c8dccc7
JB		 32#include "rate.h"
33#include "led.h"
f709fc69 34#include "mesh.h"
f0706e82 35
6042a3e3 36#define IEEE80211_ASSOC_SCANS_MAX_TRIES 2
f0706e82
JB		 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)
872ba533 47#define IEEE80211_IBSS_JOIN_TIMEOUT (7 * HZ)
f0706e82 48
f0706e82
JB		 49#define IEEE80211_IBSS_MERGE_INTERVAL (30 * HZ)
50#define IEEE80211_IBSS_INACTIVITY_LIMIT (60 * HZ)
f709fc69 51#define IEEE80211_MESH_PEER_INACTIVITY_LIMIT (1800 * HZ)
f0706e82
JB		 52
53#define IEEE80211_IBSS_MAX_STA_ENTRIES 128
54
55
9c80d3dc 56/* mgmt header + 1 byte category code */
9f985b0e
RR		 57#define IEEE80211_MIN_ACTION_SIZE (24 + 1)
58
59#define IEEE80211_ADDBA_PARAM_POLICY_MASK 0x0002
60#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
61#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
688b88a4
RR		 62#define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
63#define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
9f985b0e 64
07db2183
RR		 65/* next values represent the buffer size for A-MPDU frame.
66 * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
67#define IEEE80211_MIN_AMPDU_BUF 0x8
68#define IEEE80211_MAX_AMPDU_BUF 0x40
69
60f8b39c 70/* BSS handling */
f0706e82 71static struct ieee80211_sta_bss *
f698d856 72ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
60f8b39c
JB		 73 u8 *ssid, u8 ssid_len)
74{
75 struct ieee80211_sta_bss *bss;
76
77 spin_lock_bh(&local->sta_bss_lock);
78 bss = local->sta_bss_hash[STA_HASH(bssid)];
79 while (bss) {
80 if (!bss_mesh_cfg(bss) &&
81 !memcmp(bss->bssid, bssid, ETH_ALEN) &&
82 bss->freq == freq &&
83 bss->ssid_len == ssid_len &&
84 (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
85 atomic_inc(&bss->users);
86 break;
87 }
88 bss = bss->hnext;
89 }
90 spin_unlock_bh(&local->sta_bss_lock);
91 return bss;
92}
93
94/* Caller must hold local->sta_bss_lock */
95static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
96 struct ieee80211_sta_bss *bss)
97{
98 u8 hash_idx;
99
100 if (bss_mesh_cfg(bss))
101 hash_idx = mesh_id_hash(bss_mesh_id(bss),
102 bss_mesh_id_len(bss));
103 else
104 hash_idx = STA_HASH(bss->bssid);
105
106 bss->hnext = local->sta_bss_hash[hash_idx];
107 local->sta_bss_hash[hash_idx] = bss;
108}
109
110/* Caller must hold local->sta_bss_lock */
111static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
112 struct ieee80211_sta_bss *bss)
113{
114 struct ieee80211_sta_bss *b, *prev = NULL;
115 b = local->sta_bss_hash[STA_HASH(bss->bssid)];
116 while (b) {
117 if (b == bss) {
118 if (!prev)
119 local->sta_bss_hash[STA_HASH(bss->bssid)] =
120 bss->hnext;
121 else
122 prev->hnext = bss->hnext;
123 break;
124 }
125 prev = b;
126 b = b->hnext;
127 }
128}
129
130static struct ieee80211_sta_bss *
131ieee80211_rx_bss_add(struct ieee80211_sub_if_data *sdata, u8 *bssid, int freq,
132 u8 *ssid, u8 ssid_len)
133{
134 struct ieee80211_local *local = sdata->local;
135 struct ieee80211_sta_bss *bss;
136
137 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
138 if (!bss)
139 return NULL;
140 atomic_inc(&bss->users);
141 atomic_inc(&bss->users);
142 memcpy(bss->bssid, bssid, ETH_ALEN);
143 bss->freq = freq;
144 if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
145 memcpy(bss->ssid, ssid, ssid_len);
146 bss->ssid_len = ssid_len;
147 }
148
149 spin_lock_bh(&local->sta_bss_lock);
150 /* TODO: order by RSSI? */
151 list_add_tail(&bss->list, &local->sta_bss_list);
152 __ieee80211_rx_bss_hash_add(local, bss);
153 spin_unlock_bh(&local->sta_bss_lock);
154 return bss;
155}
156
157#ifdef CONFIG_MAC80211_MESH
158static struct ieee80211_sta_bss *
159ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
160 u8 *mesh_cfg, int freq)
161{
162 struct ieee80211_sta_bss *bss;
163
164 spin_lock_bh(&local->sta_bss_lock);
165 bss = local->sta_bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
166 while (bss) {
167 if (bss_mesh_cfg(bss) &&
168 !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
169 bss->freq == freq &&
170 mesh_id_len == bss->mesh_id_len &&
171 (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
172 mesh_id_len))) {
173 atomic_inc(&bss->users);
174 break;
175 }
176 bss = bss->hnext;
177 }
178 spin_unlock_bh(&local->sta_bss_lock);
179 return bss;
180}
181
182static struct ieee80211_sta_bss *
183ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
184 u8 *mesh_cfg, int mesh_config_len, int freq)
185{
186 struct ieee80211_sta_bss *bss;
187
188 if (mesh_config_len != MESH_CFG_LEN)
189 return NULL;
190
191 bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
192 if (!bss)
193 return NULL;
194
195 bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
196 if (!bss->mesh_cfg) {
197 kfree(bss);
198 return NULL;
199 }
200
201 if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
202 bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
203 if (!bss->mesh_id) {
204 kfree(bss->mesh_cfg);
205 kfree(bss);
206 return NULL;
207 }
208 memcpy(bss->mesh_id, mesh_id, mesh_id_len);
209 }
210
211 atomic_inc(&bss->users);
212 atomic_inc(&bss->users);
213 memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
214 bss->mesh_id_len = mesh_id_len;
215 bss->freq = freq;
216 spin_lock_bh(&local->sta_bss_lock);
217 /* TODO: order by RSSI? */
218 list_add_tail(&bss->list, &local->sta_bss_list);
219 __ieee80211_rx_bss_hash_add(local, bss);
220 spin_unlock_bh(&local->sta_bss_lock);
221 return bss;
222}
223#endif
224
225static void ieee80211_rx_bss_free(struct ieee80211_sta_bss *bss)
226{
227 kfree(bss->ies);
228 kfree(bss_mesh_id(bss));
229 kfree(bss_mesh_cfg(bss));
230 kfree(bss);
231}
232
3e122be0 233static void ieee80211_rx_bss_put(struct ieee80211_local *local,
60f8b39c
JB		 234 struct ieee80211_sta_bss *bss)
235{
236 local_bh_disable();
237 if (!atomic_dec_and_lock(&bss->users, &local->sta_bss_lock)) {
238 local_bh_enable();
239 return;
240 }
241
242 __ieee80211_rx_bss_hash_del(local, bss);
243 list_del(&bss->list);
244 spin_unlock_bh(&local->sta_bss_lock);
245 ieee80211_rx_bss_free(bss);
246}
f0706e82 247
60f8b39c
JB		 248void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
249{
250 spin_lock_init(&local->sta_bss_lock);
251 INIT_LIST_HEAD(&local->sta_bss_list);
252}
253
254void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
255{
256 struct ieee80211_sta_bss *bss, *tmp;
f0706e82 257
60f8b39c
JB		 258 list_for_each_entry_safe(bss, tmp, &local->sta_bss_list, list)
259 ieee80211_rx_bss_put(local, bss);
260}
261
262static u8 *ieee80211_bss_get_ie(struct ieee80211_sta_bss *bss, u8 ie)
43ac2ca3
JM		 263{
264 u8 *end, *pos;
265
266 pos = bss->ies;
267 if (pos == NULL)
268 return NULL;
269 end = pos + bss->ies_len;
270
271 while (pos + 1 < end) {
272 if (pos + 2 + pos[1] > end)
273 break;
274 if (pos[0] == ie)
275 return pos;
276 pos += 2 + pos[1];
277 }
278
279 return NULL;
280}
281
60f8b39c 282/* utils */
f0706e82
JB		 283static int ecw2cw(int ecw)
284{
ac2bf324 285 return (1 << ecw) - 1;
f0706e82
JB		 286}
287
60f8b39c
JB		 288/* frame sending functions */
289void ieee80211_sta_tx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
290 int encrypt)
291{
292 skb->dev = sdata->local->mdev;
293 skb_set_mac_header(skb, 0);
294 skb_set_network_header(skb, 0);
295 skb_set_transport_header(skb, 0);
e2839d8f 296
60f8b39c
JB		 297 skb->iif = sdata->dev->ifindex;
298 skb->do_not_encrypt = !encrypt;
299
300 dev_queue_xmit(skb);
301}
302
303static void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
304 struct ieee80211_if_sta *ifsta,
305 int transaction, u8 *extra, size_t extra_len,
306 int encrypt)
307{
308 struct ieee80211_local *local = sdata->local;
309 struct sk_buff *skb;
310 struct ieee80211_mgmt *mgmt;
311
312 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
313 sizeof(*mgmt) + 6 + extra_len);
314 if (!skb) {
315 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
316 "frame\n", sdata->dev->name);
317 return;
318 }
319 skb_reserve(skb, local->hw.extra_tx_headroom);
320
321 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
322 memset(mgmt, 0, 24 + 6);
323 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
324 IEEE80211_STYPE_AUTH);
325 if (encrypt)
326 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
327 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
328 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
329 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
330 mgmt->u.auth.auth_alg = cpu_to_le16(ifsta->auth_alg);
331 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
332 ifsta->auth_transaction = transaction + 1;
333 mgmt->u.auth.status_code = cpu_to_le16(0);
334 if (extra)
335 memcpy(skb_put(skb, extra_len), extra, extra_len);
336
337 ieee80211_sta_tx(sdata, skb, encrypt);
338}
339
0a51b27e
JB		 340void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
341 u8 *ssid, size_t ssid_len)
60f8b39c
JB		 342{
343 struct ieee80211_local *local = sdata->local;
344 struct ieee80211_supported_band *sband;
345 struct sk_buff *skb;
346 struct ieee80211_mgmt *mgmt;
347 u8 *pos, *supp_rates, *esupp_rates = NULL;
348 int i;
349
350 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200);
351 if (!skb) {
352 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
353 "request\n", sdata->dev->name);
354 return;
355 }
356 skb_reserve(skb, local->hw.extra_tx_headroom);
357
358 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
359 memset(mgmt, 0, 24);
360 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
361 IEEE80211_STYPE_PROBE_REQ);
362 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
363 if (dst) {
364 memcpy(mgmt->da, dst, ETH_ALEN);
365 memcpy(mgmt->bssid, dst, ETH_ALEN);
366 } else {
367 memset(mgmt->da, 0xff, ETH_ALEN);
368 memset(mgmt->bssid, 0xff, ETH_ALEN);
369 }
370 pos = skb_put(skb, 2 + ssid_len);
371 *pos++ = WLAN_EID_SSID;
372 *pos++ = ssid_len;
373 memcpy(pos, ssid, ssid_len);
374
375 supp_rates = skb_put(skb, 2);
376 supp_rates[0] = WLAN_EID_SUPP_RATES;
377 supp_rates[1] = 0;
378 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
379
380 for (i = 0; i < sband->n_bitrates; i++) {
381 struct ieee80211_rate *rate = &sband->bitrates[i];
382 if (esupp_rates) {
383 pos = skb_put(skb, 1);
384 esupp_rates[1]++;
385 } else if (supp_rates[1] == 8) {
386 esupp_rates = skb_put(skb, 3);
387 esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
388 esupp_rates[1] = 1;
389 pos = &esupp_rates[2];
390 } else {
391 pos = skb_put(skb, 1);
392 supp_rates[1]++;
393 }
394 *pos = rate->bitrate / 5;
395 }
396
397 ieee80211_sta_tx(sdata, skb, 0);
398}
399
400/* MLME */
f698d856 401static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
e2839d8f
VK		 402 struct ieee80211_sta_bss *bss,
403 int ibss)
404{
e2839d8f
VK		 405 struct ieee80211_local *local = sdata->local;
406 int i, have_higher_than_11mbit = 0;
407
408
409 /* cf. IEEE 802.11 9.2.12 */
410 for (i = 0; i < bss->supp_rates_len; i++)
411 if ((bss->supp_rates[i] & 0x7f) * 5 > 110)
412 have_higher_than_11mbit = 1;
413
414 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
415 have_higher_than_11mbit)
416 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
417 else
418 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
419
420
421 if (local->ops->conf_tx) {
422 struct ieee80211_tx_queue_params qparam;
e2839d8f
VK		 423
424 memset(&qparam, 0, sizeof(qparam));
425
426 qparam.aifs = 2;
427
428 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
429 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
430 qparam.cw_min = 31;
431 else
432 qparam.cw_min = 15;
433
434 qparam.cw_max = 1023;
435 qparam.txop = 0;
436
e100bb64
JB		 437 for (i = 0; i < local_to_hw(local)->queues; i++)
438 local->ops->conf_tx(local_to_hw(local), i, &qparam);
e2839d8f
VK		 439 }
440}
441
f698d856 442static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
f0706e82
JB		 443 struct ieee80211_if_sta *ifsta,
444 u8 *wmm_param, size_t wmm_param_len)
445{
f0706e82
JB		 446 struct ieee80211_tx_queue_params params;
447 size_t left;
448 int count;
449 u8 *pos;
450
3434fbd3
JB		 451 if (!(ifsta->flags & IEEE80211_STA_WMM_ENABLED))
452 return;
453
454 if (!wmm_param)
455 return;
456
f0706e82
JB		 457 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
458 return;
459 count = wmm_param[6] & 0x0f;
460 if (count == ifsta->wmm_last_param_set)
461 return;
462 ifsta->wmm_last_param_set = count;
463
464 pos = wmm_param + 8;
465 left = wmm_param_len - 8;
466
467 memset(&params, 0, sizeof(params));
468
469 if (!local->ops->conf_tx)
470 return;
471
472 local->wmm_acm = 0;
473 for (; left >= 4; left -= 4, pos += 4) {
474 int aci = (pos[0] >> 5) & 0x03;
475 int acm = (pos[0] >> 4) & 0x01;
476 int queue;
477
478 switch (aci) {
479 case 1:
e100bb64 480 queue = 3;
988c0f72 481 if (acm)
f0706e82 482 local->wmm_acm |= BIT(0) | BIT(3);
f0706e82
JB		 483 break;
484 case 2:
e100bb64 485 queue = 1;
988c0f72 486 if (acm)
f0706e82 487 local->wmm_acm |= BIT(4) | BIT(5);
f0706e82
JB		 488 break;
489 case 3:
e100bb64 490 queue = 0;
988c0f72 491 if (acm)
f0706e82 492 local->wmm_acm |= BIT(6) | BIT(7);
f0706e82
JB		 493 break;
494 case 0:
495 default:
e100bb64 496 queue = 2;
988c0f72 497 if (acm)
f0706e82 498 local->wmm_acm |= BIT(1) | BIT(2);
f0706e82
JB		 499 break;
500 }
501
502 params.aifs = pos[0] & 0x0f;
503 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
504 params.cw_min = ecw2cw(pos[1] & 0x0f);
f434b2d1 505 params.txop = get_unaligned_le16(pos + 2);
f4ea83dd 506#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
f0706e82 507 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
3330d7be 508 "cWmin=%d cWmax=%d txop=%d\n",
f698d856 509 local->mdev->name, queue, aci, acm, params.aifs, params.cw_min,
3330d7be
JB		 510 params.cw_max, params.txop);
511#endif
f0706e82
JB		 512 /* TODO: handle ACM (block TX, fallback to next lowest allowed
513 * AC for now) */
514 if (local->ops->conf_tx(local_to_hw(local), queue, &params)) {
515 printk(KERN_DEBUG "%s: failed to set TX queue "
f698d856 516 "parameters for queue %d\n", local->mdev->name, queue);
f0706e82
JB		 517 }
518 }
519}
520
50c4afb9
JL		 521static u32 ieee80211_handle_protect_preamb(struct ieee80211_sub_if_data *sdata,
522 bool use_protection,
523 bool use_short_preamble)
5628221c 524{
471b3efd 525 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
ebd74487 526#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c 527 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
0795af57 528 DECLARE_MAC_BUF(mac);
ebd74487 529#endif
471b3efd 530 u32 changed = 0;
5628221c 531
471b3efd 532 if (use_protection != bss_conf->use_cts_prot) {
f4ea83dd 533#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
5628221c
DD		 534 if (net_ratelimit()) {
535 printk(KERN_DEBUG "%s: CTS protection %s (BSSID="
0795af57 536 "%s)\n",
471b3efd 537 sdata->dev->name,
5628221c 538 use_protection ? "enabled" : "disabled",
0795af57 539 print_mac(mac, ifsta->bssid));
5628221c 540 }
f4ea83dd 541#endif
471b3efd
JB		 542 bss_conf->use_cts_prot = use_protection;
543 changed |= BSS_CHANGED_ERP_CTS_PROT;
5628221c 544 }
7e9ed188 545
d43c7b37 546 if (use_short_preamble != bss_conf->use_short_preamble) {
f4ea83dd 547#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
7e9ed188
DD		 548 if (net_ratelimit()) {
549 printk(KERN_DEBUG "%s: switched to %s barker preamble"
0795af57 550 " (BSSID=%s)\n",
471b3efd 551 sdata->dev->name,
d43c7b37 552 use_short_preamble ? "short" : "long",
0795af57 553 print_mac(mac, ifsta->bssid));
7e9ed188 554 }
f4ea83dd 555#endif
d43c7b37 556 bss_conf->use_short_preamble = use_short_preamble;
471b3efd 557 changed |= BSS_CHANGED_ERP_PREAMBLE;
7e9ed188 558 }
d9430a32 559
471b3efd 560 return changed;
5628221c
DD		 561}
562
50c4afb9
JL		 563static u32 ieee80211_handle_erp_ie(struct ieee80211_sub_if_data *sdata,
564 u8 erp_value)
565{
566 bool use_protection = (erp_value & WLAN_ERP_USE_PROTECTION) != 0;
567 bool use_short_preamble = (erp_value & WLAN_ERP_BARKER_PREAMBLE) == 0;
568
569 return ieee80211_handle_protect_preamb(sdata,
570 use_protection, use_short_preamble);
571}
572
573static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
574 struct ieee80211_sta_bss *bss)
575{
576 u32 changed = 0;
577
578 if (bss->has_erp_value)
579 changed |= ieee80211_handle_erp_ie(sdata, bss->erp_value);
580 else {
581 u16 capab = bss->capability;
582 changed |= ieee80211_handle_protect_preamb(sdata, false,
583 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
584 }
585
586 return changed;
587}
588
c7153508
RR		 589int ieee80211_ht_cap_ie_to_ht_info(struct ieee80211_ht_cap *ht_cap_ie,
590 struct ieee80211_ht_info *ht_info)
591{
592
593 if (ht_info == NULL)
594 return -EINVAL;
595
596 memset(ht_info, 0, sizeof(*ht_info));
597
598 if (ht_cap_ie) {
599 u8 ampdu_info = ht_cap_ie->ampdu_params_info;
600
601 ht_info->ht_supported = 1;
602 ht_info->cap = le16_to_cpu(ht_cap_ie->cap_info);
603 ht_info->ampdu_factor =
604 ampdu_info & IEEE80211_HT_CAP_AMPDU_FACTOR;
605 ht_info->ampdu_density =
606 (ampdu_info & IEEE80211_HT_CAP_AMPDU_DENSITY) >> 2;
607 memcpy(ht_info->supp_mcs_set, ht_cap_ie->supp_mcs_set, 16);
608 } else
609 ht_info->ht_supported = 0;
610
611 return 0;
612}
613
614int ieee80211_ht_addt_info_ie_to_ht_bss_info(
615 struct ieee80211_ht_addt_info *ht_add_info_ie,
616 struct ieee80211_ht_bss_info *bss_info)
617{
618 if (bss_info == NULL)
619 return -EINVAL;
620
621 memset(bss_info, 0, sizeof(*bss_info));
622
623 if (ht_add_info_ie) {
624 u16 op_mode;
625 op_mode = le16_to_cpu(ht_add_info_ie->operation_mode);
626
627 bss_info->primary_channel = ht_add_info_ie->control_chan;
628 bss_info->bss_cap = ht_add_info_ie->ht_param;
629 bss_info->bss_op_mode = (u8)(op_mode & 0xff);
630 }
631
632 return 0;
633}
5628221c 634
f5e5bf25
TW		 635static void ieee80211_sta_send_apinfo(struct ieee80211_sub_if_data *sdata,
636 struct ieee80211_if_sta *ifsta)
637{
638 union iwreq_data wrqu;
639 memset(&wrqu, 0, sizeof(wrqu));
640 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
641 memcpy(wrqu.ap_addr.sa_data, sdata->u.sta.bssid, ETH_ALEN);
642 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
643 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
644}
645
f698d856 646static void ieee80211_sta_send_associnfo(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 647 struct ieee80211_if_sta *ifsta)
648{
f0706e82
JB		 649 union iwreq_data wrqu;
650
f0706e82 651 if (ifsta->assocreq_ies) {
087d833e
JM		 652 memset(&wrqu, 0, sizeof(wrqu));
653 wrqu.data.length = ifsta->assocreq_ies_len;
b171e19e 654 wireless_send_event(sdata->dev, IWEVASSOCREQIE, &wrqu,
087d833e 655 ifsta->assocreq_ies);
f0706e82 656 }
087d833e
JM		 657 if (ifsta->assocresp_ies) {
658 memset(&wrqu, 0, sizeof(wrqu));
659 wrqu.data.length = ifsta->assocresp_ies_len;
b171e19e 660 wireless_send_event(sdata->dev, IWEVASSOCRESPIE, &wrqu,
087d833e 661 ifsta->assocresp_ies);
f0706e82 662 }
f0706e82
JB		 663}
664
665
f698d856 666static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
f5e5bf25 667 struct ieee80211_if_sta *ifsta)
f0706e82 668{
471b3efd 669 struct ieee80211_local *local = sdata->local;
38668c05 670 struct ieee80211_conf *conf = &local_to_hw(local)->conf;
471b3efd 671 u32 changed = BSS_CHANGED_ASSOC;
f0706e82 672
f5e5bf25 673 struct ieee80211_sta_bss *bss;
d6f2da5b 674
f5e5bf25 675 ifsta->flags |= IEEE80211_STA_ASSOCIATED;
5628221c 676
f5e5bf25
TW		 677 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
678 return;
21c0cbe7 679
f5e5bf25
TW		 680 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
681 conf->channel->center_freq,
682 ifsta->ssid, ifsta->ssid_len);
683 if (bss) {
684 /* set timing information */
685 sdata->bss_conf.beacon_int = bss->beacon_int;
686 sdata->bss_conf.timestamp = bss->timestamp;
687 sdata->bss_conf.dtim_period = bss->dtim_period;
21c0cbe7 688
f5e5bf25 689 changed |= ieee80211_handle_bss_capability(sdata, bss);
5628221c 690
f5e5bf25
TW		 691 ieee80211_rx_bss_put(local, bss);
692 }
38668c05 693
f5e5bf25
TW		 694 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
695 changed |= BSS_CHANGED_HT;
696 sdata->bss_conf.assoc_ht = 1;
697 sdata->bss_conf.ht_conf = &conf->ht_conf;
698 sdata->bss_conf.ht_bss_conf = &conf->ht_bss_conf;
699 }
38668c05 700
f5e5bf25
TW		 701 ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;
702 memcpy(ifsta->prev_bssid, sdata->u.sta.bssid, ETH_ALEN);
703 ieee80211_sta_send_associnfo(sdata, ifsta);
38668c05 704
f0706e82 705 ifsta->last_probe = jiffies;
f5e5bf25 706 ieee80211_led_assoc(local, 1);
471b3efd 707
f5e5bf25 708 sdata->bss_conf.assoc = 1;
471b3efd 709 ieee80211_bss_info_change_notify(sdata, changed);
8db9369f 710
24e64622 711 netif_tx_start_all_queues(sdata->dev);
f5e5bf25 712 netif_carrier_on(sdata->dev);
8db9369f 713
f5e5bf25 714 ieee80211_sta_send_apinfo(sdata, ifsta);
f0706e82
JB		 715}
716
9859b81e
RR		 717static void ieee80211_direct_probe(struct ieee80211_sub_if_data *sdata,
718 struct ieee80211_if_sta *ifsta)
719{
720 DECLARE_MAC_BUF(mac);
721
722 ifsta->direct_probe_tries++;
723 if (ifsta->direct_probe_tries > IEEE80211_AUTH_MAX_TRIES) {
724 printk(KERN_DEBUG "%s: direct probe to AP %s timed out\n",
725 sdata->dev->name, print_mac(mac, ifsta->bssid));
726 ifsta->state = IEEE80211_STA_MLME_DISABLED;
727 return;
728 }
729
730 printk(KERN_DEBUG "%s: direct probe to AP %s try %d\n",
731 sdata->dev->name, print_mac(mac, ifsta->bssid),
732 ifsta->direct_probe_tries);
733
734 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
735
736 set_bit(IEEE80211_STA_REQ_DIRECT_PROBE, &ifsta->request);
737
738 /* Direct probe is sent to broadcast address as some APs
739 * will not answer to direct packet in unassociated state.
740 */
741 ieee80211_send_probe_req(sdata, NULL,
742 ifsta->ssid, ifsta->ssid_len);
743
744 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
745}
746
f0706e82 747
f698d856 748static void ieee80211_authenticate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 749 struct ieee80211_if_sta *ifsta)
750{
0795af57
JP		 751 DECLARE_MAC_BUF(mac);
752
f0706e82
JB		 753 ifsta->auth_tries++;
754 if (ifsta->auth_tries > IEEE80211_AUTH_MAX_TRIES) {
0795af57 755 printk(KERN_DEBUG "%s: authentication with AP %s"
f0706e82 756 " timed out\n",
f698d856 757 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 758 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 759 return;
760 }
761
48c2fc59 762 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
0795af57 763 printk(KERN_DEBUG "%s: authenticate with AP %s\n",
f698d856 764 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 765
f698d856 766 ieee80211_send_auth(sdata, ifsta, 1, NULL, 0, 0);
f0706e82
JB		 767
768 mod_timer(&ifsta->timer, jiffies + IEEE80211_AUTH_TIMEOUT);
769}
770
36d16ae7
HS		 771static int ieee80211_compatible_rates(struct ieee80211_sta_bss *bss,
772 struct ieee80211_supported_band *sband,
773 u64 *rates)
774{
775 int i, j, count;
776 *rates = 0;
777 count = 0;
778 for (i = 0; i < bss->supp_rates_len; i++) {
779 int rate = (bss->supp_rates[i] & 0x7F) * 5;
780
781 for (j = 0; j < sband->n_bitrates; j++)
782 if (sband->bitrates[j].bitrate == rate) {
783 *rates |= BIT(j);
784 count++;
785 break;
786 }
787 }
788
789 return count;
790}
f0706e82 791
f698d856 792static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 793 struct ieee80211_if_sta *ifsta)
794{
f698d856 795 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 796 struct sk_buff *skb;
797 struct ieee80211_mgmt *mgmt;
43ac2ca3 798 u8 *pos, *ies, *ht_add_ie;
36d16ae7 799 int i, len, count, rates_len, supp_rates_len;
f0706e82
JB		 800 u16 capab;
801 struct ieee80211_sta_bss *bss;
802 int wmm = 0;
8318d78a 803 struct ieee80211_supported_band *sband;
36d16ae7 804 u64 rates = 0;
f0706e82
JB		 805
806 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
807 sizeof(*mgmt) + 200 + ifsta->extra_ie_len +
808 ifsta->ssid_len);
809 if (!skb) {
810 printk(KERN_DEBUG "%s: failed to allocate buffer for assoc "
f698d856 811 "frame\n", sdata->dev->name);
f0706e82
JB		 812 return;
813 }
814 skb_reserve(skb, local->hw.extra_tx_headroom);
815
8318d78a
JB		 816 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
817
f0706e82 818 capab = ifsta->capab;
8318d78a
JB		 819
820 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) {
821 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
822 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
823 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
824 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
f0706e82 825 }
8318d78a 826
f698d856 827 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 828 local->hw.conf.channel->center_freq,
cffdd30d 829 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 830 if (bss) {
831 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
832 capab |= WLAN_CAPABILITY_PRIVACY;
43ac2ca3 833 if (bss->wmm_used)
f0706e82 834 wmm = 1;
0d580a77
HS		 835
836 /* get all rates supported by the device and the AP as
837 * some APs don't like getting a superset of their rates
838 * in the association request (e.g. D-Link DAP 1353 in
839 * b-only mode) */
840 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
841
06ff47bc
TW		 842 if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
843 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
844 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
845
3e122be0 846 ieee80211_rx_bss_put(local, bss);
0d580a77
HS		 847 } else {
848 rates = ~0;
849 rates_len = sband->n_bitrates;
f0706e82
JB		 850 }
851
852 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
853 memset(mgmt, 0, 24);
854 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 855 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82
JB		 856 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
857
d6f2da5b 858 if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
f0706e82 859 skb_put(skb, 10);
e7827a70
HH		 860 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
861 IEEE80211_STYPE_REASSOC_REQ);
f0706e82 862 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 863 mgmt->u.reassoc_req.listen_interval =
864 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 865 memcpy(mgmt->u.reassoc_req.current_ap, ifsta->prev_bssid,
866 ETH_ALEN);
867 } else {
868 skb_put(skb, 4);
e7827a70
HH		 869 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
870 IEEE80211_STYPE_ASSOC_REQ);
f0706e82 871 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
ea95bba4
TW		 872 mgmt->u.reassoc_req.listen_interval =
873 cpu_to_le16(local->hw.conf.listen_interval);
f0706e82
JB		 874 }
875
876 /* SSID */
877 ies = pos = skb_put(skb, 2 + ifsta->ssid_len);
878 *pos++ = WLAN_EID_SSID;
879 *pos++ = ifsta->ssid_len;
880 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
881
0d580a77 882 /* add all rates which were marked to be used above */
36d16ae7
HS		 883 supp_rates_len = rates_len;
884 if (supp_rates_len > 8)
885 supp_rates_len = 8;
886
8318d78a 887 len = sband->n_bitrates;
36d16ae7 888 pos = skb_put(skb, supp_rates_len + 2);
f0706e82 889 *pos++ = WLAN_EID_SUPP_RATES;
36d16ae7 890 *pos++ = supp_rates_len;
f0706e82 891
36d16ae7
HS		 892 count = 0;
893 for (i = 0; i < sband->n_bitrates; i++) {
894 if (BIT(i) & rates) {
8318d78a 895 int rate = sband->bitrates[i].bitrate;
f0706e82 896 *pos++ = (u8) (rate / 5);
36d16ae7
HS		 897 if (++count == 8)
898 break;
899 }
900 }
901
8ab65b03 902 if (rates_len > count) {
36d16ae7
HS		 903 pos = skb_put(skb, rates_len - count + 2);
904 *pos++ = WLAN_EID_EXT_SUPP_RATES;
905 *pos++ = rates_len - count;
906
907 for (i++; i < sband->n_bitrates; i++) {
908 if (BIT(i) & rates) {
909 int rate = sband->bitrates[i].bitrate;
910 *pos++ = (u8) (rate / 5);
911 }
f0706e82
JB		 912 }
913 }
914
06ff47bc
TW		 915 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
916 /* 1. power capabilities */
917 pos = skb_put(skb, 4);
918 *pos++ = WLAN_EID_PWR_CAPABILITY;
919 *pos++ = 2;
920 *pos++ = 0; /* min tx power */
921 *pos++ = local->hw.conf.channel->max_power; /* max tx power */
922
923 /* 2. supported channels */
924 /* TODO: get this in reg domain format */
925 pos = skb_put(skb, 2 * sband->n_channels + 2);
926 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
927 *pos++ = 2 * sband->n_channels;
928 for (i = 0; i < sband->n_channels; i++) {
929 *pos++ = ieee80211_frequency_to_channel(
930 sband->channels[i].center_freq);
931 *pos++ = 1; /* one channel in the subband*/
932 }
933 }
934
f0706e82
JB		 935 if (ifsta->extra_ie) {
936 pos = skb_put(skb, ifsta->extra_ie_len);
937 memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);
938 }
939
d6f2da5b 940 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
f0706e82
JB		 941 pos = skb_put(skb, 9);
942 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
943 *pos++ = 7; /* len */
944 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
945 *pos++ = 0x50;
946 *pos++ = 0xf2;
947 *pos++ = 2; /* WME */
948 *pos++ = 0; /* WME info */
949 *pos++ = 1; /* WME ver */
950 *pos++ = 0;
951 }
3434fbd3 952
c7153508 953 /* wmm support is a must to HT */
3434fbd3 954 if (wmm && (ifsta->flags & IEEE80211_STA_WMM_ENABLED) &&
43ac2ca3
JM		 955 sband->ht_info.ht_supported &&
956 (ht_add_ie = ieee80211_bss_get_ie(bss, WLAN_EID_HT_EXTRA_INFO))) {
9306102e 957 struct ieee80211_ht_addt_info *ht_add_info =
43ac2ca3 958 (struct ieee80211_ht_addt_info *)ht_add_ie;
9306102e
EG		 959 u16 cap = sband->ht_info.cap;
960 __le16 tmp;
961 u32 flags = local->hw.conf.channel->flags;
962
963 switch (ht_add_info->ht_param & IEEE80211_HT_IE_CHA_SEC_OFFSET) {
964 case IEEE80211_HT_IE_CHA_SEC_ABOVE:
965 if (flags & IEEE80211_CHAN_NO_FAT_ABOVE) {
966 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
967 cap &= ~IEEE80211_HT_CAP_SGI_40;
968 }
969 break;
970 case IEEE80211_HT_IE_CHA_SEC_BELOW:
971 if (flags & IEEE80211_CHAN_NO_FAT_BELOW) {
972 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH;
973 cap &= ~IEEE80211_HT_CAP_SGI_40;
974 }
975 break;
976 }
977
978 tmp = cpu_to_le16(cap);
c7153508
RR		 979 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap)+2);
980 *pos++ = WLAN_EID_HT_CAPABILITY;
981 *pos++ = sizeof(struct ieee80211_ht_cap);
982 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
983 memcpy(pos, &tmp, sizeof(u16));
984 pos += sizeof(u16);
8318d78a
JB		 985 /* TODO: needs a define here for << 2 */
986 *pos++ = sband->ht_info.ampdu_factor |
987 (sband->ht_info.ampdu_density << 2);
988 memcpy(pos, sband->ht_info.supp_mcs_set, 16);
c7153508 989 }
f0706e82
JB		 990
991 kfree(ifsta->assocreq_ies);
992 ifsta->assocreq_ies_len = (skb->data + skb->len) - ies;
0ec0b7ac 993 ifsta->assocreq_ies = kmalloc(ifsta->assocreq_ies_len, GFP_KERNEL);
f0706e82
JB		 994 if (ifsta->assocreq_ies)
995 memcpy(ifsta->assocreq_ies, ies, ifsta->assocreq_ies_len);
996
f698d856 997 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 998}
999
1000
f698d856 1001static void ieee80211_send_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1002 struct ieee80211_if_sta *ifsta, u16 reason)
1003{
f698d856 1004 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1005 struct sk_buff *skb;
1006 struct ieee80211_mgmt *mgmt;
1007
1008 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
1009 if (!skb) {
1010 printk(KERN_DEBUG "%s: failed to allocate buffer for deauth "
f698d856 1011 "frame\n", sdata->dev->name);
f0706e82
JB		 1012 return;
1013 }
1014 skb_reserve(skb, local->hw.extra_tx_headroom);
1015
1016 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1017 memset(mgmt, 0, 24);
1018 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 1019 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 1020 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1021 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1022 IEEE80211_STYPE_DEAUTH);
f0706e82
JB		 1023 skb_put(skb, 2);
1024 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1025
f698d856 1026 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 1027}
1028
60f8b39c
JB		 1029static int ieee80211_sta_wep_configured(struct ieee80211_sub_if_data *sdata)
1030{
1031 if (!sdata || !sdata->default_key ||
1032 sdata->default_key->conf.alg != ALG_WEP)
1033 return 0;
1034 return 1;
1035}
f0706e82 1036
f698d856 1037static void ieee80211_send_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1038 struct ieee80211_if_sta *ifsta, u16 reason)
1039{
f698d856 1040 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1041 struct sk_buff *skb;
1042 struct ieee80211_mgmt *mgmt;
1043
1044 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
1045 if (!skb) {
1046 printk(KERN_DEBUG "%s: failed to allocate buffer for disassoc "
f698d856 1047 "frame\n", sdata->dev->name);
f0706e82
JB		 1048 return;
1049 }
1050 skb_reserve(skb, local->hw.extra_tx_headroom);
1051
1052 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1053 memset(mgmt, 0, 24);
1054 memcpy(mgmt->da, ifsta->bssid, ETH_ALEN);
f698d856 1055 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
f0706e82 1056 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1057 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1058 IEEE80211_STYPE_DISASSOC);
f0706e82
JB		 1059 skb_put(skb, 2);
1060 mgmt->u.disassoc.reason_code = cpu_to_le16(reason);
1061
f698d856 1062 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 1063}
1064
aa458d17
TW		 1065static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1066 struct ieee80211_if_sta *ifsta, bool deauth,
1067 bool self_disconnected, u16 reason)
1068{
1069 struct ieee80211_local *local = sdata->local;
1070 struct sta_info *sta;
f5e5bf25 1071 u32 changed = BSS_CHANGED_ASSOC;
aa458d17
TW		 1072
1073 rcu_read_lock();
1074
1075 sta = sta_info_get(local, ifsta->bssid);
1076 if (!sta) {
1077 rcu_read_unlock();
1078 return;
1079 }
1080
1081 if (deauth) {
1082 ifsta->direct_probe_tries = 0;
1083 ifsta->auth_tries = 0;
1084 }
1085 ifsta->assoc_scan_tries = 0;
1086 ifsta->assoc_tries = 0;
1087
24e64622 1088 netif_tx_stop_all_queues(sdata->dev);
aa458d17
TW		 1089 netif_carrier_off(sdata->dev);
1090
1091 ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
1092
1093 if (self_disconnected) {
1094 if (deauth)
1095 ieee80211_send_deauth(sdata, ifsta, reason);
1096 else
1097 ieee80211_send_disassoc(sdata, ifsta, reason);
1098 }
1099
f5e5bf25
TW		 1100 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
1101 changed |= ieee80211_reset_erp_info(sdata);
1102
1103 if (sdata->bss_conf.assoc_ht)
1104 changed |= BSS_CHANGED_HT;
1105
1106 sdata->bss_conf.assoc_ht = 0;
1107 sdata->bss_conf.ht_conf = NULL;
1108 sdata->bss_conf.ht_bss_conf = NULL;
1109
1110 ieee80211_led_assoc(local, 0);
1111 sdata->bss_conf.assoc = 0;
1112
1113 ieee80211_sta_send_apinfo(sdata, ifsta);
aa458d17
TW		 1114
1115 if (self_disconnected)
1116 ifsta->state = IEEE80211_STA_MLME_DISABLED;
1117
1118 sta_info_unlink(&sta);
1119
1120 rcu_read_unlock();
1121
1122 sta_info_destroy(sta);
1123}
f0706e82 1124
f698d856 1125static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1126 struct ieee80211_if_sta *ifsta)
1127{
f698d856 1128 struct ieee80211_local *local = sdata->local;
f0706e82 1129 struct ieee80211_sta_bss *bss;
5b98b1f7
JB		 1130 int bss_privacy;
1131 int wep_privacy;
1132 int privacy_invoked;
f0706e82 1133
5b98b1f7 1134 if (!ifsta || (ifsta->flags & IEEE80211_STA_MIXED_CELL))
f0706e82
JB		 1135 return 0;
1136
f698d856 1137 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
8318d78a 1138 local->hw.conf.channel->center_freq,
cffdd30d 1139 ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 1140 if (!bss)
1141 return 0;
1142
5b98b1f7 1143 bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
f698d856 1144 wep_privacy = !!ieee80211_sta_wep_configured(sdata);
5b98b1f7 1145 privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
f0706e82 1146
3e122be0 1147 ieee80211_rx_bss_put(local, bss);
f0706e82 1148
5b98b1f7
JB		 1149 if ((bss_privacy == wep_privacy) || (bss_privacy == privacy_invoked))
1150 return 0;
1151
1152 return 1;
f0706e82
JB		 1153}
1154
f698d856 1155static void ieee80211_associate(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1156 struct ieee80211_if_sta *ifsta)
1157{
0795af57
JP		 1158 DECLARE_MAC_BUF(mac);
1159
f0706e82
JB		 1160 ifsta->assoc_tries++;
1161 if (ifsta->assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
0795af57 1162 printk(KERN_DEBUG "%s: association with AP %s"
f0706e82 1163 " timed out\n",
f698d856 1164 sdata->dev->name, print_mac(mac, ifsta->bssid));
48c2fc59 1165 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1166 return;
1167 }
1168
48c2fc59 1169 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
0795af57 1170 printk(KERN_DEBUG "%s: associate with AP %s\n",
f698d856
JBG		 1171 sdata->dev->name, print_mac(mac, ifsta->bssid));
1172 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
f0706e82 1173 printk(KERN_DEBUG "%s: mismatch in privacy configuration and "
f698d856 1174 "mixed-cell disabled - abort association\n", sdata->dev->name);
48c2fc59 1175 ifsta->state = IEEE80211_STA_MLME_DISABLED;
f0706e82
JB		 1176 return;
1177 }
1178
f698d856 1179 ieee80211_send_assoc(sdata, ifsta);
f0706e82
JB		 1180
1181 mod_timer(&ifsta->timer, jiffies + IEEE80211_ASSOC_TIMEOUT);
1182}
1183
1184
f698d856 1185static void ieee80211_associated(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1186 struct ieee80211_if_sta *ifsta)
1187{
f698d856 1188 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 1189 struct sta_info *sta;
1190 int disassoc;
0795af57 1191 DECLARE_MAC_BUF(mac);
f0706e82
JB		 1192
1193 /* TODO: start monitoring current AP signal quality and number of
1194 * missed beacons. Scan other channels every now and then and search
1195 * for better APs. */
1196 /* TODO: remove expired BSSes */
1197
48c2fc59 1198 ifsta->state = IEEE80211_STA_MLME_ASSOCIATED;
f0706e82 1199
d0709a65
JB		 1200 rcu_read_lock();
1201
f0706e82
JB		 1202 sta = sta_info_get(local, ifsta->bssid);
1203 if (!sta) {
0795af57 1204 printk(KERN_DEBUG "%s: No STA entry for own AP %s\n",
f698d856 1205 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82
JB		 1206 disassoc = 1;
1207 } else {
1208 disassoc = 0;
1209 if (time_after(jiffies,
1210 sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
d6f2da5b 1211 if (ifsta->flags & IEEE80211_STA_PROBEREQ_POLL) {
f0706e82 1212 printk(KERN_DEBUG "%s: No ProbeResp from "
0795af57 1213 "current AP %s - assume out of "
f0706e82 1214 "range\n",
f698d856 1215 sdata->dev->name, print_mac(mac, ifsta->bssid));
f0706e82 1216 disassoc = 1;
d6f2da5b 1217 } else
f698d856 1218 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1219 local->scan_ssid,
1220 local->scan_ssid_len);
d6f2da5b 1221 ifsta->flags ^= IEEE80211_STA_PROBEREQ_POLL;
f0706e82 1222 } else {
d6f2da5b 1223 ifsta->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
f0706e82
JB		 1224 if (time_after(jiffies, ifsta->last_probe +
1225 IEEE80211_PROBE_INTERVAL)) {
1226 ifsta->last_probe = jiffies;
f698d856 1227 ieee80211_send_probe_req(sdata, ifsta->bssid,
f0706e82
JB		 1228 ifsta->ssid,
1229 ifsta->ssid_len);
1230 }
1231 }
f0706e82 1232 }
d0709a65
JB		 1233
1234 rcu_read_unlock();
1235
60f8b39c
JB		 1236 if (disassoc)
1237 ieee80211_set_disassoc(sdata, ifsta, true, true,
1238 WLAN_REASON_PREV_AUTH_NOT_VALID);
1239 else
1240 mod_timer(&ifsta->timer, jiffies +
1241 IEEE80211_MONITORING_INTERVAL);
f0706e82
JB		 1242}
1243
1244
f698d856 1245static void ieee80211_auth_completed(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1246 struct ieee80211_if_sta *ifsta)
1247{
f698d856 1248 printk(KERN_DEBUG "%s: authenticated\n", sdata->dev->name);
d6f2da5b 1249 ifsta->flags |= IEEE80211_STA_AUTHENTICATED;
f698d856 1250 ieee80211_associate(sdata, ifsta);
f0706e82
JB		 1251}
1252
1253
f698d856 1254static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1255 struct ieee80211_if_sta *ifsta,
1256 struct ieee80211_mgmt *mgmt,
1257 size_t len)
1258{
1259 u8 *pos;
1260 struct ieee802_11_elems elems;
1261
f0706e82 1262 pos = mgmt->u.auth.variable;
67a4cce4 1263 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f4ea83dd 1264 if (!elems.challenge)
f0706e82 1265 return;
f698d856 1266 ieee80211_send_auth(sdata, ifsta, 3, elems.challenge - 2,
f0706e82
JB		 1267 elems.challenge_len + 2, 1);
1268}
1269
f698d856 1270static void ieee80211_send_addba_resp(struct ieee80211_sub_if_data *sdata, u8 *da, u16 tid,
9f985b0e
RR		 1271 u8 dialog_token, u16 status, u16 policy,
1272 u16 buf_size, u16 timeout)
1273{
9f985b0e 1274 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
f698d856 1275 struct ieee80211_local *local = sdata->local;
9f985b0e
RR		 1276 struct sk_buff *skb;
1277 struct ieee80211_mgmt *mgmt;
1278 u16 capab;
1279
3acea5b6
EK		 1280 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
1281
9f985b0e
RR		 1282 if (!skb) {
1283 printk(KERN_DEBUG "%s: failed to allocate buffer "
f698d856 1284 "for addba resp frame\n", sdata->dev->name);
9f985b0e
RR		 1285 return;
1286 }
1287
1288 skb_reserve(skb, local->hw.extra_tx_headroom);
1289 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1290 memset(mgmt, 0, 24);
1291 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1292 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1293 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1294 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
9f985b0e
RR		 1295 else
1296 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1297 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1298 IEEE80211_STYPE_ACTION);
9f985b0e
RR		 1299
1300 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_resp));
1301 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1302 mgmt->u.action.u.addba_resp.action_code = WLAN_ACTION_ADDBA_RESP;
1303 mgmt->u.action.u.addba_resp.dialog_token = dialog_token;
1304
1305 capab = (u16)(policy << 1); /* bit 1 aggregation policy */
1306 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1307 capab |= (u16)(buf_size << 6); /* bit 15:6 max size of aggregation */
1308
1309 mgmt->u.action.u.addba_resp.capab = cpu_to_le16(capab);
1310 mgmt->u.action.u.addba_resp.timeout = cpu_to_le16(timeout);
1311 mgmt->u.action.u.addba_resp.status = cpu_to_le16(status);
1312
f698d856 1313 ieee80211_sta_tx(sdata, skb, 0);
9f985b0e
RR		 1314
1315 return;
1316}
1317
f698d856 1318void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da,
eadc8d9e
RR		 1319 u16 tid, u8 dialog_token, u16 start_seq_num,
1320 u16 agg_size, u16 timeout)
1321{
f698d856 1322 struct ieee80211_local *local = sdata->local;
eadc8d9e
RR		 1323 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1324 struct sk_buff *skb;
1325 struct ieee80211_mgmt *mgmt;
1326 u16 capab;
1327
3acea5b6 1328 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
eadc8d9e
RR		 1329
1330 if (!skb) {
1331 printk(KERN_ERR "%s: failed to allocate buffer "
f698d856 1332 "for addba request frame\n", sdata->dev->name);
eadc8d9e
RR		 1333 return;
1334 }
1335 skb_reserve(skb, local->hw.extra_tx_headroom);
1336 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1337 memset(mgmt, 0, 24);
1338 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1339 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
eadc8d9e 1340 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1341 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
eadc8d9e
RR		 1342 else
1343 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
1344
e7827a70
HH		 1345 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1346 IEEE80211_STYPE_ACTION);
eadc8d9e
RR		 1347
1348 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
1349
1350 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1351 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
1352
1353 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
1354 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
1355 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
1356 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
1357
1358 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
1359
1360 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
1361 mgmt->u.action.u.addba_req.start_seq_num =
1362 cpu_to_le16(start_seq_num << 4);
1363
f698d856 1364 ieee80211_sta_tx(sdata, skb, 0);
eadc8d9e
RR		 1365}
1366
60f8b39c
JB		 1367/*
1368 * After accepting the AddBA Request we activated a timer,
1369 * resetting it after each frame that arrives from the originator.
1370 * if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
1371 */
1372static void sta_rx_agg_session_timer_expired(unsigned long data)
1373{
1374 /* not an elegant detour, but there is no choice as the timer passes
1375 * only one argument, and various sta_info are needed here, so init
1376 * flow in sta_info_create gives the TID as data, while the timer_to_id
1377 * array gives the sta through container_of */
1378 u8 *ptid = (u8 *)data;
1379 u8 *timer_to_id = ptid - *ptid;
1380 struct sta_info *sta = container_of(timer_to_id, struct sta_info,
1381 timer_to_tid[0]);
1382
1383#ifdef CONFIG_MAC80211_HT_DEBUG
1384 printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
1385#endif
1386 ieee80211_sta_stop_rx_ba_session(sta->sdata, sta->addr,
1387 (u16)*ptid, WLAN_BACK_TIMER,
1388 WLAN_REASON_QSTA_TIMEOUT);
1389}
1390
f698d856 1391static void ieee80211_sta_process_addba_request(struct ieee80211_local *local,
9f985b0e
RR		 1392 struct ieee80211_mgmt *mgmt,
1393 size_t len)
1394{
07db2183
RR		 1395 struct ieee80211_hw *hw = &local->hw;
1396 struct ieee80211_conf *conf = &hw->conf;
9f985b0e 1397 struct sta_info *sta;
07db2183
RR		 1398 struct tid_ampdu_rx *tid_agg_rx;
1399 u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
9f985b0e 1400 u8 dialog_token;
07db2183
RR		 1401 int ret = -EOPNOTSUPP;
1402 DECLARE_MAC_BUF(mac);
9f985b0e 1403
d0709a65
JB		 1404 rcu_read_lock();
1405
9f985b0e 1406 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1407 if (!sta) {
1408 rcu_read_unlock();
9f985b0e 1409 return;
d0709a65 1410 }
9f985b0e
RR		 1411
1412 /* extract session parameters from addba request frame */
1413 dialog_token = mgmt->u.action.u.addba_req.dialog_token;
1414 timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
07db2183
RR		 1415 start_seq_num =
1416 le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
9f985b0e
RR		 1417
1418 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1419 ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
1420 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1421 buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
1422
9f985b0e
RR		 1423 status = WLAN_STATUS_REQUEST_DECLINED;
1424
07db2183
RR		 1425 /* sanity check for incoming parameters:
1426 * check if configuration can support the BA policy
1427 * and if buffer size does not exceeds max value */
1428 if (((ba_policy != 1)
1429 && (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
1430 || (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
1431 status = WLAN_STATUS_INVALID_QOS_PARAM;
1432#ifdef CONFIG_MAC80211_HT_DEBUG
1433 if (net_ratelimit())
7b9d44cd 1434 printk(KERN_DEBUG "AddBA Req with bad params from "
07db2183
RR		 1435 "%s on tid %u. policy %d, buffer size %d\n",
1436 print_mac(mac, mgmt->sa), tid, ba_policy,
1437 buf_size);
1438#endif /* CONFIG_MAC80211_HT_DEBUG */
1439 goto end_no_lock;
1440 }
1441 /* determine default buffer size */
1442 if (buf_size == 0) {
8318d78a
JB		 1443 struct ieee80211_supported_band *sband;
1444
1445 sband = local->hw.wiphy->bands[conf->channel->band];
07db2183 1446 buf_size = IEEE80211_MIN_AMPDU_BUF;
8318d78a 1447 buf_size = buf_size << sband->ht_info.ampdu_factor;
07db2183
RR		 1448 }
1449
07db2183
RR		 1450
1451 /* examine state machine */
07346f81 1452 spin_lock_bh(&sta->lock);
07db2183 1453
cee24a3e 1454 if (sta->ampdu_mlme.tid_state_rx[tid] != HT_AGG_STATE_IDLE) {
07db2183
RR		 1455#ifdef CONFIG_MAC80211_HT_DEBUG
1456 if (net_ratelimit())
7b9d44cd 1457 printk(KERN_DEBUG "unexpected AddBA Req from "
07db2183
RR		 1458 "%s on tid %u\n",
1459 print_mac(mac, mgmt->sa), tid);
1460#endif /* CONFIG_MAC80211_HT_DEBUG */
1461 goto end;
1462 }
1463
cee24a3e
RR		 1464 /* prepare A-MPDU MLME for Rx aggregation */
1465 sta->ampdu_mlme.tid_rx[tid] =
1466 kmalloc(sizeof(struct tid_ampdu_rx), GFP_ATOMIC);
1467 if (!sta->ampdu_mlme.tid_rx[tid]) {
f4ea83dd 1468#ifdef CONFIG_MAC80211_HT_DEBUG
cee24a3e
RR		 1469 if (net_ratelimit())
1470 printk(KERN_ERR "allocate rx mlme to tid %d failed\n",
1471 tid);
f4ea83dd 1472#endif
cee24a3e
RR		 1473 goto end;
1474 }
1475 /* rx timer */
1476 sta->ampdu_mlme.tid_rx[tid]->session_timer.function =
1477 sta_rx_agg_session_timer_expired;
1478 sta->ampdu_mlme.tid_rx[tid]->session_timer.data =
1479 (unsigned long)&sta->timer_to_tid[tid];
1480 init_timer(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
1481
1482 tid_agg_rx = sta->ampdu_mlme.tid_rx[tid];
1483
07db2183
RR		 1484 /* prepare reordering buffer */
1485 tid_agg_rx->reorder_buf =
c97c23e3 1486 kmalloc(buf_size * sizeof(struct sk_buff *), GFP_ATOMIC);
03147dfc 1487 if (!tid_agg_rx->reorder_buf) {
f4ea83dd 1488#ifdef CONFIG_MAC80211_HT_DEBUG
03147dfc
JB		 1489 if (net_ratelimit())
1490 printk(KERN_ERR "can not allocate reordering buffer "
1491 "to tid %d\n", tid);
f4ea83dd 1492#endif
cee24a3e 1493 kfree(sta->ampdu_mlme.tid_rx[tid]);
07db2183
RR		 1494 goto end;
1495 }
1496 memset(tid_agg_rx->reorder_buf, 0,
c97c23e3 1497 buf_size * sizeof(struct sk_buff *));
07db2183
RR		 1498
1499 if (local->ops->ampdu_action)
1500 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
0df3ef45 1501 sta->addr, tid, &start_seq_num);
07db2183 1502#ifdef CONFIG_MAC80211_HT_DEBUG
513a1025 1503 printk(KERN_DEBUG "Rx A-MPDU request on tid %d result %d\n", tid, ret);
07db2183
RR		 1504#endif /* CONFIG_MAC80211_HT_DEBUG */
1505
1506 if (ret) {
1507 kfree(tid_agg_rx->reorder_buf);
cee24a3e
RR		 1508 kfree(tid_agg_rx);
1509 sta->ampdu_mlme.tid_rx[tid] = NULL;
07db2183
RR		 1510 goto end;
1511 }
1512
1513 /* change state and send addba resp */
cee24a3e 1514 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_OPERATIONAL;
07db2183
RR		 1515 tid_agg_rx->dialog_token = dialog_token;
1516 tid_agg_rx->ssn = start_seq_num;
1517 tid_agg_rx->head_seq_num = start_seq_num;
1518 tid_agg_rx->buf_size = buf_size;
1519 tid_agg_rx->timeout = timeout;
1520 tid_agg_rx->stored_mpdu_num = 0;
1521 status = WLAN_STATUS_SUCCESS;
1522end:
07346f81 1523 spin_unlock_bh(&sta->lock);
07db2183
RR		 1524
1525end_no_lock:
f698d856 1526 ieee80211_send_addba_resp(sta->sdata, sta->addr, tid,
d0709a65
JB		 1527 dialog_token, status, 1, buf_size, timeout);
1528 rcu_read_unlock();
9f985b0e 1529}
f0706e82 1530
f698d856 1531static void ieee80211_sta_process_addba_resp(struct ieee80211_local *local,
eadc8d9e
RR		 1532 struct ieee80211_mgmt *mgmt,
1533 size_t len)
1534{
eadc8d9e
RR		 1535 struct ieee80211_hw *hw = &local->hw;
1536 struct sta_info *sta;
1537 u16 capab;
1538 u16 tid;
1539 u8 *state;
1540
d0709a65
JB		 1541 rcu_read_lock();
1542
eadc8d9e 1543 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1544 if (!sta) {
1545 rcu_read_unlock();
eadc8d9e 1546 return;
d0709a65 1547 }
eadc8d9e
RR		 1548
1549 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
1550 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1551
cee24a3e 1552 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1553
07346f81 1554 spin_lock_bh(&sta->lock);
eadc8d9e 1555
cee24a3e 1556 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1557 spin_unlock_bh(&sta->lock);
cee24a3e
RR		 1558 goto addba_resp_exit;
1559 }
1560
eadc8d9e 1561 if (mgmt->u.action.u.addba_resp.dialog_token !=
cee24a3e 1562 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
07346f81 1563 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1564#ifdef CONFIG_MAC80211_HT_DEBUG
1565 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
1566#endif /* CONFIG_MAC80211_HT_DEBUG */
cee24a3e 1567 goto addba_resp_exit;
eadc8d9e
RR		 1568 }
1569
cee24a3e 1570 del_timer_sync(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
eadc8d9e
RR		 1571#ifdef CONFIG_MAC80211_HT_DEBUG
1572 printk(KERN_DEBUG "switched off addBA timer for tid %d \n", tid);
1573#endif /* CONFIG_MAC80211_HT_DEBUG */
1574 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
1575 == WLAN_STATUS_SUCCESS) {
eadc8d9e 1576 *state |= HT_ADDBA_RECEIVED_MSK;
cee24a3e 1577 sta->ampdu_mlme.addba_req_num[tid] = 0;
eadc8d9e 1578
f4ea83dd 1579 if (*state == HT_AGG_STATE_OPERATIONAL)
eadc8d9e 1580 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
eadc8d9e 1581
07346f81 1582 spin_unlock_bh(&sta->lock);
eadc8d9e 1583 } else {
cee24a3e 1584 sta->ampdu_mlme.addba_req_num[tid]++;
eadc8d9e
RR		 1585 /* this will allow the state check in stop_BA_session */
1586 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1587 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1588 ieee80211_stop_tx_ba_session(hw, sta->addr, tid,
1589 WLAN_BACK_INITIATOR);
1590 }
cee24a3e
RR		 1591
1592addba_resp_exit:
d0709a65 1593 rcu_read_unlock();
eadc8d9e
RR		 1594}
1595
f698d856 1596void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid,
eadc8d9e 1597 u16 initiator, u16 reason_code)
07db2183 1598{
f698d856 1599 struct ieee80211_local *local = sdata->local;
07db2183
RR		 1600 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
1601 struct sk_buff *skb;
1602 struct ieee80211_mgmt *mgmt;
1603 u16 params;
1604
3acea5b6 1605 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
07db2183
RR		 1606
1607 if (!skb) {
1608 printk(KERN_ERR "%s: failed to allocate buffer "
f698d856 1609 "for delba frame\n", sdata->dev->name);
07db2183
RR		 1610 return;
1611 }
1612
1613 skb_reserve(skb, local->hw.extra_tx_headroom);
1614 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
1615 memset(mgmt, 0, 24);
1616 memcpy(mgmt->da, da, ETH_ALEN);
f698d856 1617 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
51fb61e7 1618 if (sdata->vif.type == IEEE80211_IF_TYPE_AP)
f698d856 1619 memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN);
07db2183
RR		 1620 else
1621 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
e7827a70
HH		 1622 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1623 IEEE80211_STYPE_ACTION);
07db2183
RR		 1624
1625 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
1626
1627 mgmt->u.action.category = WLAN_CATEGORY_BACK;
1628 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
1629 params = (u16)(initiator << 11); /* bit 11 initiator */
1630 params |= (u16)(tid << 12); /* bit 15:12 TID number */
1631
1632 mgmt->u.action.u.delba.params = cpu_to_le16(params);
1633 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
1634
f698d856 1635 ieee80211_sta_tx(sdata, skb, 0);
07db2183
RR		 1636}
1637
f698d856 1638void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
429a3805 1639{
f698d856 1640 struct ieee80211_local *local = sdata->local;
429a3805
RR		 1641 struct sk_buff *skb;
1642 struct ieee80211_bar *bar;
1643 u16 bar_control = 0;
1644
1645 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
1646 if (!skb) {
1647 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1648 "bar frame\n", sdata->dev->name);
429a3805
RR		 1649 return;
1650 }
1651 skb_reserve(skb, local->hw.extra_tx_headroom);
1652 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
1653 memset(bar, 0, sizeof(*bar));
e7827a70
HH		 1654 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1655 IEEE80211_STYPE_BACK_REQ);
429a3805 1656 memcpy(bar->ra, ra, ETH_ALEN);
f698d856 1657 memcpy(bar->ta, sdata->dev->dev_addr, ETH_ALEN);
429a3805
RR		 1658 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
1659 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
1660 bar_control |= (u16)(tid << 12);
1661 bar->control = cpu_to_le16(bar_control);
1662 bar->start_seq_num = cpu_to_le16(ssn);
1663
f698d856 1664 ieee80211_sta_tx(sdata, skb, 0);
429a3805
RR		 1665}
1666
f698d856 1667void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid,
07db2183
RR		 1668 u16 initiator, u16 reason)
1669{
f698d856 1670 struct ieee80211_local *local = sdata->local;
07db2183
RR		 1671 struct ieee80211_hw *hw = &local->hw;
1672 struct sta_info *sta;
b580781e 1673 int ret, i;
513a1025 1674 DECLARE_MAC_BUF(mac);
07db2183 1675
d0709a65
JB		 1676 rcu_read_lock();
1677
07db2183 1678 sta = sta_info_get(local, ra);
d0709a65
JB		 1679 if (!sta) {
1680 rcu_read_unlock();
07db2183 1681 return;
d0709a65 1682 }
07db2183
RR		 1683
1684 /* check if TID is in operational state */
07346f81 1685 spin_lock_bh(&sta->lock);
cee24a3e 1686 if (sta->ampdu_mlme.tid_state_rx[tid]
07db2183 1687 != HT_AGG_STATE_OPERATIONAL) {
07346f81 1688 spin_unlock_bh(&sta->lock);
d0709a65 1689 rcu_read_unlock();
07db2183
RR		 1690 return;
1691 }
cee24a3e 1692 sta->ampdu_mlme.tid_state_rx[tid] =
07db2183
RR		 1693 HT_AGG_STATE_REQ_STOP_BA_MSK |
1694 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
07346f81 1695 spin_unlock_bh(&sta->lock);
07db2183
RR		 1696
1697 /* stop HW Rx aggregation. ampdu_action existence
1698 * already verified in session init so we add the BUG_ON */
1699 BUG_ON(!local->ops->ampdu_action);
1700
513a1025
RR		 1701#ifdef CONFIG_MAC80211_HT_DEBUG
1702 printk(KERN_DEBUG "Rx BA session stop requested for %s tid %u\n",
1703 print_mac(mac, ra), tid);
1704#endif /* CONFIG_MAC80211_HT_DEBUG */
1705
07db2183 1706 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
0df3ef45 1707 ra, tid, NULL);
07db2183
RR		 1708 if (ret)
1709 printk(KERN_DEBUG "HW problem - can not stop rx "
f4ea83dd 1710 "aggregation for tid %d\n", tid);
07db2183
RR		 1711
1712 /* shutdown timer has not expired */
1713 if (initiator != WLAN_BACK_TIMER)
cee24a3e 1714 del_timer_sync(&sta->ampdu_mlme.tid_rx[tid]->session_timer);
07db2183
RR		 1715
1716 /* check if this is a self generated aggregation halt */
1717 if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
f698d856 1718 ieee80211_send_delba(sdata, ra, tid, 0, reason);
07db2183
RR		 1719
1720 /* free the reordering buffer */
cee24a3e
RR		 1721 for (i = 0; i < sta->ampdu_mlme.tid_rx[tid]->buf_size; i++) {
1722 if (sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]) {
b580781e 1723 /* release the reordered frames */
cee24a3e
RR		 1724 dev_kfree_skb(sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i]);
1725 sta->ampdu_mlme.tid_rx[tid]->stored_mpdu_num--;
1726 sta->ampdu_mlme.tid_rx[tid]->reorder_buf[i] = NULL;
b580781e
RR		 1727 }
1728 }
cee24a3e
RR		 1729 /* free resources */
1730 kfree(sta->ampdu_mlme.tid_rx[tid]->reorder_buf);
1731 kfree(sta->ampdu_mlme.tid_rx[tid]);
1732 sta->ampdu_mlme.tid_rx[tid] = NULL;
1733 sta->ampdu_mlme.tid_state_rx[tid] = HT_AGG_STATE_IDLE;
07db2183 1734
d0709a65 1735 rcu_read_unlock();
07db2183
RR		 1736}
1737
eadc8d9e 1738
f698d856 1739static void ieee80211_sta_process_delba(struct ieee80211_sub_if_data *sdata,
688b88a4
RR		 1740 struct ieee80211_mgmt *mgmt, size_t len)
1741{
f698d856 1742 struct ieee80211_local *local = sdata->local;
688b88a4
RR		 1743 struct sta_info *sta;
1744 u16 tid, params;
1745 u16 initiator;
1746 DECLARE_MAC_BUF(mac);
1747
d0709a65
JB		 1748 rcu_read_lock();
1749
688b88a4 1750 sta = sta_info_get(local, mgmt->sa);
d0709a65
JB		 1751 if (!sta) {
1752 rcu_read_unlock();
688b88a4 1753 return;
d0709a65 1754 }
688b88a4
RR		 1755
1756 params = le16_to_cpu(mgmt->u.action.u.delba.params);
1757 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
1758 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
1759
1760#ifdef CONFIG_MAC80211_HT_DEBUG
1761 if (net_ratelimit())
d92684e6
RR		 1762 printk(KERN_DEBUG "delba from %s (%s) tid %d reason code %d\n",
1763 print_mac(mac, mgmt->sa),
2e354ed7 1764 initiator ? "initiator" : "recipient", tid,
688b88a4
RR		 1765 mgmt->u.action.u.delba.reason_code);
1766#endif /* CONFIG_MAC80211_HT_DEBUG */
1767
1768 if (initiator == WLAN_BACK_INITIATOR)
f698d856 1769 ieee80211_sta_stop_rx_ba_session(sdata, sta->addr, tid,
688b88a4 1770 WLAN_BACK_INITIATOR, 0);
d92684e6 1771 else { /* WLAN_BACK_RECIPIENT */
07346f81 1772 spin_lock_bh(&sta->lock);
cee24a3e 1773 sta->ampdu_mlme.tid_state_tx[tid] =
d92684e6 1774 HT_AGG_STATE_OPERATIONAL;
07346f81 1775 spin_unlock_bh(&sta->lock);
d92684e6
RR		 1776 ieee80211_stop_tx_ba_session(&local->hw, sta->addr, tid,
1777 WLAN_BACK_RECIPIENT);
1778 }
d0709a65 1779 rcu_read_unlock();
688b88a4
RR		 1780}
1781
eadc8d9e
RR		 1782/*
1783 * After sending add Block Ack request we activated a timer until
1784 * add Block Ack response will arrive from the recipient.
1785 * If this timer expires sta_addba_resp_timer_expired will be executed.
1786 */
1787void sta_addba_resp_timer_expired(unsigned long data)
1788{
1789 /* not an elegant detour, but there is no choice as the timer passes
1790 * only one argument, and both sta_info and TID are needed, so init
73651ee6 1791 * flow in sta_info_create gives the TID as data, while the timer_to_id
eadc8d9e 1792 * array gives the sta through container_of */
70d251b2 1793 u16 tid = *(u8 *)data;
eadc8d9e
RR		 1794 struct sta_info *temp_sta = container_of((void *)data,
1795 struct sta_info, timer_to_tid[tid]);
1796
1797 struct ieee80211_local *local = temp_sta->local;
1798 struct ieee80211_hw *hw = &local->hw;
1799 struct sta_info *sta;
1800 u8 *state;
1801
d0709a65
JB		 1802 rcu_read_lock();
1803
eadc8d9e 1804 sta = sta_info_get(local, temp_sta->addr);
d0709a65
JB		 1805 if (!sta) {
1806 rcu_read_unlock();
eadc8d9e 1807 return;
d0709a65 1808 }
eadc8d9e 1809
cee24a3e 1810 state = &sta->ampdu_mlme.tid_state_tx[tid];
eadc8d9e 1811 /* check if the TID waits for addBA response */
07346f81 1812 spin_lock_bh(&sta->lock);
eadc8d9e 1813 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
07346f81 1814 spin_unlock_bh(&sta->lock);
eadc8d9e 1815 *state = HT_AGG_STATE_IDLE;
f4ea83dd 1816#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e
RR		 1817 printk(KERN_DEBUG "timer expired on tid %d but we are not "
1818 "expecting addBA response there", tid);
f4ea83dd 1819#endif
eadc8d9e
RR		 1820 goto timer_expired_exit;
1821 }
1822
f4ea83dd 1823#ifdef CONFIG_MAC80211_HT_DEBUG
eadc8d9e 1824 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
f4ea83dd 1825#endif
eadc8d9e
RR		 1826
1827 /* go through the state check in stop_BA_session */
1828 *state = HT_AGG_STATE_OPERATIONAL;
07346f81 1829 spin_unlock_bh(&sta->lock);
eadc8d9e
RR		 1830 ieee80211_stop_tx_ba_session(hw, temp_sta->addr, tid,
1831 WLAN_BACK_INITIATOR);
1832
1833timer_expired_exit:
d0709a65 1834 rcu_read_unlock();
eadc8d9e
RR		 1835}
1836
f698d856 1837void ieee80211_sta_tear_down_BA_sessions(struct ieee80211_sub_if_data *sdata, u8 *addr)
85249e5f 1838{
f698d856 1839 struct ieee80211_local *local = sdata->local;
85249e5f
RR		 1840 int i;
1841
1842 for (i = 0; i < STA_TID_NUM; i++) {
1843 ieee80211_stop_tx_ba_session(&local->hw, addr, i,
1844 WLAN_BACK_INITIATOR);
f698d856 1845 ieee80211_sta_stop_rx_ba_session(sdata, addr, i,
85249e5f
RR		 1846 WLAN_BACK_RECIPIENT,
1847 WLAN_REASON_QSTA_LEAVE_QBSS);
1848 }
1849}
07db2183 1850
f698d856 1851static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1852 struct ieee80211_msrment_ie *request_ie,
1853 const u8 *da, const u8 *bssid,
1854 u8 dialog_token)
1855{
f698d856 1856 struct ieee80211_local *local = sdata->local;
b6623486
AK		 1857 struct sk_buff *skb;
1858 struct ieee80211_mgmt *msr_report;
1859
1860 skb = dev_alloc_skb(sizeof(*msr_report) + local->hw.extra_tx_headroom +
1861 sizeof(struct ieee80211_msrment_ie));
1862
1863 if (!skb) {
1864 printk(KERN_ERR "%s: failed to allocate buffer for "
f698d856 1865 "measurement report frame\n", sdata->dev->name);
b6623486
AK		 1866 return;
1867 }
1868
1869 skb_reserve(skb, local->hw.extra_tx_headroom);
1870 msr_report = (struct ieee80211_mgmt *)skb_put(skb, 24);
1871 memset(msr_report, 0, 24);
1872 memcpy(msr_report->da, da, ETH_ALEN);
f698d856 1873 memcpy(msr_report->sa, sdata->dev->dev_addr, ETH_ALEN);
b6623486 1874 memcpy(msr_report->bssid, bssid, ETH_ALEN);
e7827a70 1875 msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
b6623486
AK		 1876 IEEE80211_STYPE_ACTION);
1877
1878 skb_put(skb, 1 + sizeof(msr_report->u.action.u.measurement));
1879 msr_report->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
1880 msr_report->u.action.u.measurement.action_code =
1881 WLAN_ACTION_SPCT_MSR_RPRT;
1882 msr_report->u.action.u.measurement.dialog_token = dialog_token;
1883
1884 msr_report->u.action.u.measurement.element_id = WLAN_EID_MEASURE_REPORT;
1885 msr_report->u.action.u.measurement.length =
1886 sizeof(struct ieee80211_msrment_ie);
1887
1888 memset(&msr_report->u.action.u.measurement.msr_elem, 0,
1889 sizeof(struct ieee80211_msrment_ie));
1890 msr_report->u.action.u.measurement.msr_elem.token = request_ie->token;
1891 msr_report->u.action.u.measurement.msr_elem.mode |=
1892 IEEE80211_SPCT_MSR_RPRT_MODE_REFUSED;
1893 msr_report->u.action.u.measurement.msr_elem.type = request_ie->type;
1894
f698d856 1895 ieee80211_sta_tx(sdata, skb, 0);
b6623486
AK		 1896}
1897
f698d856 1898static void ieee80211_sta_process_measurement_req(struct ieee80211_sub_if_data *sdata,
b6623486
AK		 1899 struct ieee80211_mgmt *mgmt,
1900 size_t len)
1901{
1902 /*
1903 * Ignoring measurement request is spec violation.
1904 * Mandatory measurements must be reported optional
1905 * measurements might be refused or reported incapable
1906 * For now just refuse
1907 * TODO: Answer basic measurement as unmeasured
1908 */
f698d856 1909 ieee80211_send_refuse_measurement_request(sdata,
b6623486
AK		 1910 &mgmt->u.action.u.measurement.msr_elem,
1911 mgmt->sa, mgmt->bssid,
1912 mgmt->u.action.u.measurement.dialog_token);
1913}
1914
1915
f698d856 1916static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 1917 struct ieee80211_if_sta *ifsta,
1918 struct ieee80211_mgmt *mgmt,
1919 size_t len)
1920{
f0706e82 1921 u16 auth_alg, auth_transaction, status_code;
0795af57 1922 DECLARE_MAC_BUF(mac);
f0706e82 1923
48c2fc59 1924 if (ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
f4ea83dd 1925 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82 1926 return;
f0706e82 1927
f4ea83dd 1928 if (len < 24 + 6)
f0706e82 1929 return;
f0706e82 1930
51fb61e7 1931 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1932 memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 1933 return;
f0706e82 1934
51fb61e7 1935 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
f4ea83dd 1936 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
f0706e82 1937 return;
f0706e82
JB		 1938
1939 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1940 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1941 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1942
51fb61e7 1943 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
135a2110
JB		 1944 /*
1945 * IEEE 802.11 standard does not require authentication in IBSS
f0706e82
JB		 1946 * networks and most implementations do not seem to use it.
1947 * However, try to reply to authentication attempts if someone
1948 * has actually implemented this.
135a2110 1949 */
f4ea83dd 1950 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1)
f0706e82 1951 return;
f698d856 1952 ieee80211_send_auth(sdata, ifsta, 2, NULL, 0, 0);
f0706e82
JB		 1953 }
1954
1955 if (auth_alg != ifsta->auth_alg ||
f4ea83dd 1956 auth_transaction != ifsta->auth_transaction)
f0706e82 1957 return;
f0706e82
JB		 1958
1959 if (status_code != WLAN_STATUS_SUCCESS) {
f0706e82
JB		 1960 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
1961 u8 algs[3];
1962 const int num_algs = ARRAY_SIZE(algs);
1963 int i, pos;
1964 algs[0] = algs[1] = algs[2] = 0xff;
1965 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
1966 algs[0] = WLAN_AUTH_OPEN;
1967 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
1968 algs[1] = WLAN_AUTH_SHARED_KEY;
1969 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
1970 algs[2] = WLAN_AUTH_LEAP;
1971 if (ifsta->auth_alg == WLAN_AUTH_OPEN)
1972 pos = 0;
1973 else if (ifsta->auth_alg == WLAN_AUTH_SHARED_KEY)
1974 pos = 1;
1975 else
1976 pos = 2;
1977 for (i = 0; i < num_algs; i++) {
1978 pos++;
1979 if (pos >= num_algs)
1980 pos = 0;
1981 if (algs[pos] == ifsta->auth_alg ||
1982 algs[pos] == 0xff)
1983 continue;
1984 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
f698d856 1985 !ieee80211_sta_wep_configured(sdata))
f0706e82
JB		 1986 continue;
1987 ifsta->auth_alg = algs[pos];
f0706e82
JB		 1988 break;
1989 }
1990 }
1991 return;
1992 }
1993
1994 switch (ifsta->auth_alg) {
1995 case WLAN_AUTH_OPEN:
1996 case WLAN_AUTH_LEAP:
f698d856 1997 ieee80211_auth_completed(sdata, ifsta);
f0706e82
JB		 1998 break;
1999 case WLAN_AUTH_SHARED_KEY:
2000 if (ifsta->auth_transaction == 4)
f698d856 2001 ieee80211_auth_completed(sdata, ifsta);
f0706e82 2002 else
f698d856 2003 ieee80211_auth_challenge(sdata, ifsta, mgmt, len);
f0706e82
JB		 2004 break;
2005 }
2006}
2007
2008
f698d856 2009static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2010 struct ieee80211_if_sta *ifsta,
2011 struct ieee80211_mgmt *mgmt,
2012 size_t len)
2013{
2014 u16 reason_code;
0795af57 2015 DECLARE_MAC_BUF(mac);
f0706e82 2016
f4ea83dd 2017 if (len < 24 + 2)
f0706e82 2018 return;
f0706e82 2019
f4ea83dd 2020 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 2021 return;
f0706e82
JB		 2022
2023 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2024
988c0f72 2025 if (ifsta->flags & IEEE80211_STA_AUTHENTICATED)
f698d856 2026 printk(KERN_DEBUG "%s: deauthenticated\n", sdata->dev->name);
f0706e82 2027
48c2fc59
TW		 2028 if (ifsta->state == IEEE80211_STA_MLME_AUTHENTICATE ||
2029 ifsta->state == IEEE80211_STA_MLME_ASSOCIATE ||
2030 ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
9859b81e 2031 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
f0706e82
JB		 2032 mod_timer(&ifsta->timer, jiffies +
2033 IEEE80211_RETRY_AUTH_INTERVAL);
2034 }
2035
aa458d17 2036 ieee80211_set_disassoc(sdata, ifsta, true, false, 0);
d6f2da5b 2037 ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
f0706e82
JB		 2038}
2039
2040
f698d856 2041static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2042 struct ieee80211_if_sta *ifsta,
2043 struct ieee80211_mgmt *mgmt,
2044 size_t len)
2045{
2046 u16 reason_code;
0795af57 2047 DECLARE_MAC_BUF(mac);
f0706e82 2048
f4ea83dd 2049 if (len < 24 + 2)
f0706e82 2050 return;
f0706e82 2051
f4ea83dd 2052 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN))
f0706e82 2053 return;
f0706e82
JB		 2054
2055 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2056
d6f2da5b 2057 if (ifsta->flags & IEEE80211_STA_ASSOCIATED)
f698d856 2058 printk(KERN_DEBUG "%s: disassociated\n", sdata->dev->name);
f0706e82 2059
48c2fc59
TW		 2060 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED) {
2061 ifsta->state = IEEE80211_STA_MLME_ASSOCIATE;
f0706e82
JB		 2062 mod_timer(&ifsta->timer, jiffies +
2063 IEEE80211_RETRY_AUTH_INTERVAL);
2064 }
2065
aa458d17 2066 ieee80211_set_disassoc(sdata, ifsta, false, false, 0);
f0706e82
JB		 2067}
2068
2069
471b3efd 2070static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2071 struct ieee80211_if_sta *ifsta,
2072 struct ieee80211_mgmt *mgmt,
2073 size_t len,
2074 int reassoc)
2075{
471b3efd 2076 struct ieee80211_local *local = sdata->local;
8318d78a 2077 struct ieee80211_supported_band *sband;
f0706e82 2078 struct sta_info *sta;
8318d78a 2079 u64 rates, basic_rates;
f0706e82
JB		 2080 u16 capab_info, status_code, aid;
2081 struct ieee802_11_elems elems;
471b3efd 2082 struct ieee80211_bss_conf *bss_conf = &sdata->bss_conf;
f0706e82
JB		 2083 u8 *pos;
2084 int i, j;
0795af57 2085 DECLARE_MAC_BUF(mac);
8318d78a 2086 bool have_higher_than_11mbit = false;
f0706e82
JB		 2087
2088 /* AssocResp and ReassocResp have identical structure, so process both
2089 * of them in this function. */
2090
48c2fc59 2091 if (ifsta->state != IEEE80211_STA_MLME_ASSOCIATE)
f0706e82 2092 return;
f0706e82 2093
f4ea83dd 2094 if (len < 24 + 6)
f0706e82 2095 return;
f0706e82 2096
f4ea83dd 2097 if (memcmp(ifsta->bssid, mgmt->sa, ETH_ALEN) != 0)
f0706e82 2098 return;
f0706e82
JB		 2099
2100 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2101 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2102 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
f0706e82 2103
0795af57 2104 printk(KERN_DEBUG "%s: RX %sssocResp from %s (capab=0x%x "
f0706e82 2105 "status=%d aid=%d)\n",
f698d856 2106 sdata->dev->name, reassoc ? "Rea" : "A", print_mac(mac, mgmt->sa),
ddd68587 2107 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
f0706e82
JB		 2108
2109 if (status_code != WLAN_STATUS_SUCCESS) {
2110 printk(KERN_DEBUG "%s: AP denied association (code=%d)\n",
f698d856 2111 sdata->dev->name, status_code);
8a69aa93
DD		 2112 /* if this was a reassociation, ensure we try a "full"
2113 * association next time. This works around some broken APs
2114 * which do not correctly reject reassociation requests. */
d6f2da5b 2115 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
f0706e82
JB		 2116 return;
2117 }
2118
1dd84aa2
JB		 2119 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2120 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
f698d856 2121 "set\n", sdata->dev->name, aid);
1dd84aa2
JB		 2122 aid &= ~(BIT(15) | BIT(14));
2123
f0706e82 2124 pos = mgmt->u.assoc_resp.variable;
67a4cce4 2125 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
f0706e82
JB		 2126
2127 if (!elems.supp_rates) {
2128 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
f698d856 2129 sdata->dev->name);
f0706e82
JB		 2130 return;
2131 }
2132
f698d856 2133 printk(KERN_DEBUG "%s: associated\n", sdata->dev->name);
f0706e82
JB		 2134 ifsta->aid = aid;
2135 ifsta->ap_capab = capab_info;
2136
2137 kfree(ifsta->assocresp_ies);
2138 ifsta->assocresp_ies_len = len - (pos - (u8 *) mgmt);
0ec0b7ac 2139 ifsta->assocresp_ies = kmalloc(ifsta->assocresp_ies_len, GFP_KERNEL);
f0706e82
JB		 2140 if (ifsta->assocresp_ies)
2141 memcpy(ifsta->assocresp_ies, pos, ifsta->assocresp_ies_len);
2142
d0709a65
JB		 2143 rcu_read_lock();
2144
f0706e82
JB		 2145 /* Add STA entry for the AP */
2146 sta = sta_info_get(local, ifsta->bssid);
2147 if (!sta) {
2148 struct ieee80211_sta_bss *bss;
73651ee6 2149 int err;
d0709a65 2150
73651ee6
JB		 2151 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
2152 if (!sta) {
2153 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
f698d856 2154 " the AP\n", sdata->dev->name);
d0709a65 2155 rcu_read_unlock();
f0706e82
JB		 2156 return;
2157 }
60f8b39c
JB		 2158 bss = ieee80211_rx_bss_get(local, ifsta->bssid,
2159 local->hw.conf.channel->center_freq,
2160 ifsta->ssid, ifsta->ssid_len);
2161 if (bss) {
2162 sta->last_signal = bss->signal;
2163 sta->last_qual = bss->qual;
2164 sta->last_noise = bss->noise;
2165 ieee80211_rx_bss_put(local, bss);
2166 }
f709fc69 2167
60f8b39c
JB		 2168 err = sta_info_insert(sta);
2169 if (err) {
2170 printk(KERN_DEBUG "%s: failed to insert STA entry for"
2171 " the AP (error %d)\n", sdata->dev->name, err);
2172 rcu_read_unlock();
2173 return;
f709fc69 2174 }
60f8b39c
JB		 2175 /* update new sta with its last rx activity */
2176 sta->last_rx = jiffies;
f709fc69 2177 }
f709fc69 2178
60f8b39c
JB		 2179 /*
2180 * FIXME: Do we really need to update the sta_info's information here?
2181 * We already know about the AP (we found it in our list) so it
2182 * should already be filled with the right info, no?
2183 * As is stands, all this is racy because typically we assume
2184 * the information that is filled in here (except flags) doesn't
2185 * change while a STA structure is alive. As such, it should move
2186 * to between the sta_info_alloc() and sta_info_insert() above.
2187 */
f709fc69 2188
60f8b39c
JB		 2189 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC | WLAN_STA_ASSOC_AP |
2190 WLAN_STA_AUTHORIZED);
05e5e883 2191
60f8b39c
JB		 2192 rates = 0;
2193 basic_rates = 0;
2194 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
f709fc69 2195
60f8b39c
JB		 2196 for (i = 0; i < elems.supp_rates_len; i++) {
2197 int rate = (elems.supp_rates[i] & 0x7f) * 5;
f709fc69 2198
60f8b39c
JB		 2199 if (rate > 110)
2200 have_higher_than_11mbit = true;
2201
2202 for (j = 0; j < sband->n_bitrates; j++) {
2203 if (sband->bitrates[j].bitrate == rate)
2204 rates |= BIT(j);
2205 if (elems.supp_rates[i] & 0x80)
2206 basic_rates |= BIT(j);
f709fc69 2207 }
f709fc69
LCC		 2208 }
2209
60f8b39c
JB		 2210 for (i = 0; i < elems.ext_supp_rates_len; i++) {
2211 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
f0706e82 2212
60f8b39c
JB		 2213 if (rate > 110)
2214 have_higher_than_11mbit = true;
f0706e82 2215
60f8b39c
JB		 2216 for (j = 0; j < sband->n_bitrates; j++) {
2217 if (sband->bitrates[j].bitrate == rate)
2218 rates |= BIT(j);
2219 if (elems.ext_supp_rates[i] & 0x80)
2220 basic_rates |= BIT(j);
2221 }
1ebebea8 2222 }
f0706e82 2223
60f8b39c
JB		 2224 sta->supp_rates[local->hw.conf.channel->band] = rates;
2225 sdata->basic_rates = basic_rates;
2226
2227 /* cf. IEEE 802.11 9.2.12 */
2228 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
2229 have_higher_than_11mbit)
2230 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
2231 else
2232 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
f0706e82 2233
60f8b39c
JB		 2234 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
2235 (ifsta->flags & IEEE80211_STA_WMM_ENABLED)) {
2236 struct ieee80211_ht_bss_info bss_info;
2237 ieee80211_ht_cap_ie_to_ht_info(
2238 (struct ieee80211_ht_cap *)
2239 elems.ht_cap_elem, &sta->ht_info);
2240 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2241 (struct ieee80211_ht_addt_info *)
2242 elems.ht_info_elem, &bss_info);
2243 ieee80211_handle_ht(local, 1, &sta->ht_info, &bss_info);
2244 }
f0706e82 2245
60f8b39c 2246 rate_control_rate_init(sta, local);
f0706e82 2247
60f8b39c
JB		 2248 if (elems.wmm_param) {
2249 set_sta_flags(sta, WLAN_STA_WME);
2250 rcu_read_unlock();
2251 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2252 elems.wmm_param_len);
2253 } else
2254 rcu_read_unlock();
f0706e82 2255
60f8b39c
JB		 2256 /* set AID and assoc capability,
2257 * ieee80211_set_associated() will tell the driver */
2258 bss_conf->aid = aid;
2259 bss_conf->assoc_capability = capab_info;
2260 ieee80211_set_associated(sdata, ifsta);
f0706e82 2261
60f8b39c 2262 ieee80211_associated(sdata, ifsta);
f0706e82
JB		 2263}
2264
2265
f698d856 2266static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
a607268a
BR		 2267 struct ieee80211_if_sta *ifsta,
2268 struct ieee80211_sta_bss *bss)
2269{
f698d856 2270 struct ieee80211_local *local = sdata->local;
a607268a
BR		 2271 int res, rates, i, j;
2272 struct sk_buff *skb;
2273 struct ieee80211_mgmt *mgmt;
a607268a 2274 u8 *pos;
a607268a 2275 struct ieee80211_supported_band *sband;
507b06d0 2276 union iwreq_data wrqu;
a607268a
BR		 2277
2278 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2279
2280 /* Remove possible STA entries from other IBSS networks. */
dc6676b7 2281 sta_info_flush_delayed(sdata);
a607268a
BR		 2282
2283 if (local->ops->reset_tsf) {
2284 /* Reset own TSF to allow time synchronization work. */
2285 local->ops->reset_tsf(local_to_hw(local));
2286 }
2287 memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);
9d139c81 2288 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
a607268a
BR		 2289 if (res)
2290 return res;
2291
2292 local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2293
a607268a
BR		 2294 sdata->drop_unencrypted = bss->capability &
2295 WLAN_CAPABILITY_PRIVACY ? 1 : 0;
2296
f698d856 2297 res = ieee80211_set_freq(sdata, bss->freq);
a607268a 2298
be038b37
AK		 2299 if (res)
2300 return res;
a607268a 2301
9d139c81 2302 /* Build IBSS probe response */
a607268a 2303 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
9d139c81 2304 if (skb) {
a607268a
BR		 2305 skb_reserve(skb, local->hw.extra_tx_headroom);
2306
2307 mgmt = (struct ieee80211_mgmt *)
2308 skb_put(skb, 24 + sizeof(mgmt->u.beacon));
2309 memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
e7827a70
HH		 2310 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2311 IEEE80211_STYPE_PROBE_RESP);
a607268a 2312 memset(mgmt->da, 0xff, ETH_ALEN);
f698d856 2313 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
a607268a
BR		 2314 memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
2315 mgmt->u.beacon.beacon_int =
2316 cpu_to_le16(local->hw.conf.beacon_int);
4faeb860 2317 mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);
a607268a
BR		 2318 mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);
2319
2320 pos = skb_put(skb, 2 + ifsta->ssid_len);
2321 *pos++ = WLAN_EID_SSID;
2322 *pos++ = ifsta->ssid_len;
2323 memcpy(pos, ifsta->ssid, ifsta->ssid_len);
2324
2325 rates = bss->supp_rates_len;
2326 if (rates > 8)
2327 rates = 8;
2328 pos = skb_put(skb, 2 + rates);
2329 *pos++ = WLAN_EID_SUPP_RATES;
2330 *pos++ = rates;
2331 memcpy(pos, bss->supp_rates, rates);
2332
2333 if (bss->band == IEEE80211_BAND_2GHZ) {
2334 pos = skb_put(skb, 2 + 1);
2335 *pos++ = WLAN_EID_DS_PARAMS;
2336 *pos++ = 1;
2337 *pos++ = ieee80211_frequency_to_channel(bss->freq);
2338 }
2339
2340 pos = skb_put(skb, 2 + 2);
2341 *pos++ = WLAN_EID_IBSS_PARAMS;
2342 *pos++ = 2;
2343 /* FIX: set ATIM window based on scan results */
2344 *pos++ = 0;
2345 *pos++ = 0;
2346
2347 if (bss->supp_rates_len > 8) {
2348 rates = bss->supp_rates_len - 8;
2349 pos = skb_put(skb, 2 + rates);
2350 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2351 *pos++ = rates;
2352 memcpy(pos, &bss->supp_rates[8], rates);
2353 }
2354
9d139c81 2355 ifsta->probe_resp = skb;
e039fa4a 2356
9d139c81
JB		 2357 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
2358 }
a607268a 2359
9d139c81
JB		 2360 rates = 0;
2361 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2362 for (i = 0; i < bss->supp_rates_len; i++) {
2363 int bitrate = (bss->supp_rates[i] & 0x7f) * 5;
2364 for (j = 0; j < sband->n_bitrates; j++)
2365 if (sband->bitrates[j].bitrate == bitrate)
2366 rates |= BIT(j);
a607268a 2367 }
9d139c81
JB		 2368 ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;
2369
f698d856 2370 ieee80211_sta_def_wmm_params(sdata, bss, 1);
a607268a 2371
48c2fc59 2372 ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
a607268a
BR		 2373 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
2374
507b06d0
DW		 2375 memset(&wrqu, 0, sizeof(wrqu));
2376 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);
f698d856 2377 wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);
a607268a
BR		 2378
2379 return res;
2380}
2381
f709fc69
LCC		 2382u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
2383 struct ieee802_11_elems *elems,
2384 enum ieee80211_band band)
2385{
2386 struct ieee80211_supported_band *sband;
2387 struct ieee80211_rate *bitrates;
2388 size_t num_rates;
2389 u64 supp_rates;
2390 int i, j;
2391 sband = local->hw.wiphy->bands[band];
2392
2393 if (!sband) {
2394 WARN_ON(1);
2395 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2396 }
2397
2398 bitrates = sband->bitrates;
2399 num_rates = sband->n_bitrates;
2400 supp_rates = 0;
2401 for (i = 0; i < elems->supp_rates_len +
2402 elems->ext_supp_rates_len; i++) {
2403 u8 rate = 0;
2404 int own_rate;
2405 if (i < elems->supp_rates_len)
2406 rate = elems->supp_rates[i];
2407 else if (elems->ext_supp_rates)
2408 rate = elems->ext_supp_rates
2409 [i - elems->supp_rates_len];
2410 own_rate = 5 * (rate & 0x7f);
2411 for (j = 0; j < num_rates; j++)
2412 if (bitrates[j].bitrate == own_rate)
2413 supp_rates |= BIT(j);
2414 }
2415 return supp_rates;
2416}
2417
8e1535d5
EG		 2418static u64 ieee80211_sta_get_mandatory_rates(struct ieee80211_local *local,
2419 enum ieee80211_band band)
2420{
2421 struct ieee80211_supported_band *sband;
2422 struct ieee80211_rate *bitrates;
2423 u64 mandatory_rates;
2424 enum ieee80211_rate_flags mandatory_flag;
2425 int i;
2426
2427 sband = local->hw.wiphy->bands[band];
2428 if (!sband) {
2429 WARN_ON(1);
2430 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
2431 }
2432
2433 if (band == IEEE80211_BAND_2GHZ)
2434 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
2435 else
2436 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
2437
2438 bitrates = sband->bitrates;
2439 mandatory_rates = 0;
2440 for (i = 0; i < sband->n_bitrates; i++)
2441 if (bitrates[i].flags & mandatory_flag)
2442 mandatory_rates |= BIT(i);
2443 return mandatory_rates;
2444}
a607268a 2445
f698d856 2446static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2447 struct ieee80211_mgmt *mgmt,
2448 size_t len,
2449 struct ieee80211_rx_status *rx_status,
9859b81e 2450 struct ieee802_11_elems *elems)
f0706e82 2451{
f698d856 2452 struct ieee80211_local *local = sdata->local;
8318d78a 2453 int freq, clen;
f0706e82
JB		 2454 struct ieee80211_sta_bss *bss;
2455 struct sta_info *sta;
fab7d4a2 2456 struct ieee80211_channel *channel;
8e1535d5
EG		 2457 u64 beacon_timestamp, rx_timestamp;
2458 u64 supp_rates = 0;
9859b81e 2459 bool beacon = ieee80211_is_beacon(mgmt->frame_control);
8e1535d5 2460 enum ieee80211_band band = rx_status->band;
0795af57
JP		 2461 DECLARE_MAC_BUF(mac);
2462 DECLARE_MAC_BUF(mac2);
f0706e82 2463
5bda6175
JB		 2464 if (elems->ds_params && elems->ds_params_len == 1)
2465 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
2466 else
2467 freq = rx_status->freq;
2468
2469 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2470
2471 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2472 return;
f0706e82 2473
ae6a44e3 2474 if (ieee80211_vif_is_mesh(&sdata->vif) && elems->mesh_id &&
f698d856 2475 elems->mesh_config && mesh_matches_local(elems, sdata)) {
8e1535d5 2476 supp_rates = ieee80211_sta_get_rates(local, elems, band);
902acc78 2477
8e1535d5 2478 mesh_neighbour_update(mgmt->sa, supp_rates, sdata,
f698d856 2479 mesh_peer_accepts_plinks(elems));
902acc78 2480 }
f709fc69 2481
ae6a44e3 2482 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates &&
8e1535d5 2483 memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
8e1535d5
EG		 2484 supp_rates = ieee80211_sta_get_rates(local, elems, band);
2485
69e6c010
JB		 2486 rcu_read_lock();
2487
8e1535d5
EG		 2488 sta = sta_info_get(local, mgmt->sa);
2489 if (sta) {
2490 u64 prev_rates;
2491
2492 prev_rates = sta->supp_rates[band];
2493 /* make sure mandatory rates are always added */
2494 sta->supp_rates[band] = supp_rates |
2495 ieee80211_sta_get_mandatory_rates(local, band);
2496
2497#ifdef CONFIG_MAC80211_IBSS_DEBUG
2498 if (sta->supp_rates[band] != prev_rates)
2499 printk(KERN_DEBUG "%s: updated supp_rates set "
2500 "for %s based on beacon info (0x%llx | "
2501 "0x%llx -> 0x%llx)\n",
2502 sdata->dev->name, print_mac(mac, sta->addr),
2503 (unsigned long long) prev_rates,
2504 (unsigned long long) supp_rates,
2505 (unsigned long long) sta->supp_rates[band]);
2506#endif
2507 } else {
2508 ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid,
2509 mgmt->sa, supp_rates);
f0706e82 2510 }
f0706e82 2511
69e6c010
JB		 2512 rcu_read_unlock();
2513 }
d0709a65 2514
f709fc69 2515#ifdef CONFIG_MAC80211_MESH
ae6a44e3 2516 if (elems->mesh_config)
f698d856 2517 bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
ae6a44e3 2518 elems->mesh_id_len, elems->mesh_config, freq);
f709fc69
LCC		 2519 else
2520#endif
f698d856 2521 bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
ae6a44e3 2522 elems->ssid, elems->ssid_len);
f709fc69
LCC		 2523 if (!bss) {
2524#ifdef CONFIG_MAC80211_MESH
ae6a44e3 2525 if (elems->mesh_config)
f698d856 2526 bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
ae6a44e3
EK		 2527 elems->mesh_id_len, elems->mesh_config,
2528 elems->mesh_config_len, freq);
f709fc69
LCC		 2529 else
2530#endif
f698d856 2531 bss = ieee80211_rx_bss_add(sdata, mgmt->bssid, freq,
ae6a44e3 2532 elems->ssid, elems->ssid_len);
f0706e82
JB		 2533 if (!bss)
2534 return;
2535 } else {
2536#if 0
2537 /* TODO: order by RSSI? */
2538 spin_lock_bh(&local->sta_bss_lock);
2539 list_move_tail(&bss->list, &local->sta_bss_list);
2540 spin_unlock_bh(&local->sta_bss_lock);
2541#endif
2542 }
2543
5628221c 2544 /* save the ERP value so that it is available at association time */
ae6a44e3
EK		 2545 if (elems->erp_info && elems->erp_info_len >= 1) {
2546 bss->erp_value = elems->erp_info[0];
5628221c
DD		 2547 bss->has_erp_value = 1;
2548 }
2549
f0706e82
JB		 2550 bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
2551 bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
f0706e82 2552
98f7dfd8
EG		 2553 if (elems->tim) {
2554 struct ieee80211_tim_ie *tim_ie =
2555 (struct ieee80211_tim_ie *)elems->tim;
2556 bss->dtim_period = tim_ie->dtim_period;
2557 }
2558
2559 /* set default value for buggy APs */
2560 if (!elems->tim || bss->dtim_period == 0)
2561 bss->dtim_period = 1;
2562
f0706e82 2563 bss->supp_rates_len = 0;
ae6a44e3 2564 if (elems->supp_rates) {
f0706e82 2565 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
ae6a44e3
EK		 2566 if (clen > elems->supp_rates_len)
2567 clen = elems->supp_rates_len;
2568 memcpy(&bss->supp_rates[bss->supp_rates_len], elems->supp_rates,
f0706e82
JB		 2569 clen);
2570 bss->supp_rates_len += clen;
2571 }
ae6a44e3 2572 if (elems->ext_supp_rates) {
f0706e82 2573 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
ae6a44e3
EK		 2574 if (clen > elems->ext_supp_rates_len)
2575 clen = elems->ext_supp_rates_len;
f0706e82 2576 memcpy(&bss->supp_rates[bss->supp_rates_len],
ae6a44e3 2577 elems->ext_supp_rates, clen);
f0706e82
JB		 2578 bss->supp_rates_len += clen;
2579 }
2580
8e1535d5 2581 bss->band = band;
30b89b0f 2582
5bda6175
JB		 2583 beacon_timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
2584
30b89b0f
JB		 2585 bss->timestamp = beacon_timestamp;
2586 bss->last_update = jiffies;
30b89b0f
JB		 2587 bss->signal = rx_status->signal;
2588 bss->noise = rx_status->noise;
566bfe5a 2589 bss->qual = rx_status->qual;
9859b81e
RR		 2590 if (!beacon)
2591 bss->last_probe_resp = jiffies;
30b89b0f
JB		 2592 /*
2593 * In STA mode, the remaining parameters should not be overridden
2594 * by beacons because they're not necessarily accurate there.
2595 */
2596 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
9859b81e 2597 bss->last_probe_resp && beacon) {
3e122be0 2598 ieee80211_rx_bss_put(local, bss);
30b89b0f
JB		 2599 return;
2600 }
2601
43ac2ca3
JM		 2602 if (bss->ies == NULL || bss->ies_len < elems->total_len) {
2603 kfree(bss->ies);
2604 bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
f0706e82 2605 }
43ac2ca3
JM		 2606 if (bss->ies) {
2607 memcpy(bss->ies, elems->ie_start, elems->total_len);
2608 bss->ies_len = elems->total_len;
2609 } else
2610 bss->ies_len = 0;
f0706e82 2611
43ac2ca3 2612 bss->wmm_used = elems->wmm_param || elems->wmm_info;
9d9bf77d
BR		 2613
2614 /* check if we need to merge IBSS */
2615 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && beacon &&
2616 !local->sta_sw_scanning && !local->sta_hw_scanning &&
fba4a1e6 2617 bss->capability & WLAN_CAPABILITY_IBSS &&
9d9bf77d 2618 bss->freq == local->oper_channel->center_freq &&
ae6a44e3
EK		 2619 elems->ssid_len == sdata->u.sta.ssid_len &&
2620 memcmp(elems->ssid, sdata->u.sta.ssid,
2621 sdata->u.sta.ssid_len) == 0) {
9d9bf77d
BR		 2622 if (rx_status->flag & RX_FLAG_TSFT) {
2623 /* in order for correct IBSS merging we need mactime
2624 *
2625 * since mactime is defined as the time the first data
2626 * symbol of the frame hits the PHY, and the timestamp
2627 * of the beacon is defined as "the time that the data
2628 * symbol containing the first bit of the timestamp is
2629 * transmitted to the PHY plus the transmitting STA’s
2630 * delays through its local PHY from the MAC-PHY
2631 * interface to its interface with the WM"
2632 * (802.11 11.1.2) - equals the time this bit arrives at
2633 * the receiver - we have to take into account the
2634 * offset between the two.
2635 * e.g: at 1 MBit that means mactime is 192 usec earlier
2636 * (=24 bytes * 8 usecs/byte) than the beacon timestamp.
2637 */
8e1535d5 2638 int rate = local->hw.wiphy->bands[band]->
9d9bf77d
BR		 2639 bitrates[rx_status->rate_idx].bitrate;
2640 rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
2641 } else if (local && local->ops && local->ops->get_tsf)
2642 /* second best option: get current TSF */
2643 rx_timestamp = local->ops->get_tsf(local_to_hw(local));
2644 else
2645 /* can't merge without knowing the TSF */
2646 rx_timestamp = -1LLU;
2647#ifdef CONFIG_MAC80211_IBSS_DEBUG
2648 printk(KERN_DEBUG "RX beacon SA=%s BSSID="
2649 "%s TSF=0x%llx BCN=0x%llx diff=%lld @%lu\n",
2650 print_mac(mac, mgmt->sa),
2651 print_mac(mac2, mgmt->bssid),
2652 (unsigned long long)rx_timestamp,
2653 (unsigned long long)beacon_timestamp,
2654 (unsigned long long)(rx_timestamp - beacon_timestamp),
2655 jiffies);
2656#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2657 if (beacon_timestamp > rx_timestamp) {
576fdeae 2658#ifdef CONFIG_MAC80211_IBSS_DEBUG
f4ea83dd
JB		 2659 printk(KERN_DEBUG "%s: beacon TSF higher than "
2660 "local TSF - IBSS merge with BSSID %s\n",
f698d856 2661 sdata->dev->name, print_mac(mac, mgmt->bssid));
fba4a1e6 2662#endif
f698d856
JBG		 2663 ieee80211_sta_join_ibss(sdata, &sdata->u.sta, bss);
2664 ieee80211_ibss_add_sta(sdata, NULL,
87291c02 2665 mgmt->bssid, mgmt->sa,
8e1535d5 2666 supp_rates);
9d9bf77d
BR		 2667 }
2668 }
2669
3e122be0 2670 ieee80211_rx_bss_put(local, bss);
f0706e82
JB		 2671}
2672
2673
f698d856 2674static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2675 struct ieee80211_mgmt *mgmt,
2676 size_t len,
2677 struct ieee80211_rx_status *rx_status)
2678{
ae6a44e3
EK		 2679 size_t baselen;
2680 struct ieee802_11_elems elems;
9859b81e 2681 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
ae6a44e3 2682
8e7cdbb6
TW		 2683 if (memcmp(mgmt->da, sdata->dev->dev_addr, ETH_ALEN))
2684 return; /* ignore ProbeResp to foreign address */
2685
ae6a44e3
EK		 2686 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2687 if (baselen > len)
2688 return;
2689
2690 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2691 &elems);
2692
9859b81e
RR		 2693 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2694
2695 /* direct probe may be part of the association flow */
2696 if (test_and_clear_bit(IEEE80211_STA_REQ_DIRECT_PROBE,
2697 &ifsta->request)) {
2698 printk(KERN_DEBUG "%s direct probe responded\n",
2699 sdata->dev->name);
2700 ieee80211_authenticate(sdata, ifsta);
2701 }
f0706e82
JB		 2702}
2703
2704
f698d856 2705static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2706 struct ieee80211_mgmt *mgmt,
2707 size_t len,
2708 struct ieee80211_rx_status *rx_status)
2709{
f0706e82 2710 struct ieee80211_if_sta *ifsta;
f0706e82
JB		 2711 size_t baselen;
2712 struct ieee802_11_elems elems;
f698d856 2713 struct ieee80211_local *local = sdata->local;
d3c990fb 2714 struct ieee80211_conf *conf = &local->hw.conf;
471b3efd 2715 u32 changed = 0;
f0706e82 2716
ae6a44e3
EK		 2717 /* Process beacon from the current BSS */
2718 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2719 if (baselen > len)
2720 return;
2721
2722 ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen, &elems);
2723
9859b81e 2724 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
f0706e82 2725
51fb61e7 2726 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 2727 return;
2728 ifsta = &sdata->u.sta;
2729
d6f2da5b 2730 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED) ||
f0706e82
JB		 2731 memcmp(ifsta->bssid, mgmt->bssid, ETH_ALEN) != 0)
2732 return;
2733
d18ef29f 2734 /* Do not send changes to driver if we are scanning. This removes
fe3fa827
JB		 2735 * requirement that a driver's bss_info_changed/conf_tx functions
2736 * need to be atomic.
2737 * This is really ugly code, we should rewrite scanning and make
2738 * all this more understandable for humans.
2739 */
d18ef29f
RC		 2740 if (local->sta_sw_scanning || local->sta_hw_scanning)
2741 return;
2742
fe3fa827
JB		 2743 ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
2744 elems.wmm_param_len);
2745
5628221c 2746 if (elems.erp_info && elems.erp_info_len >= 1)
471b3efd 2747 changed |= ieee80211_handle_erp_ie(sdata, elems.erp_info[0]);
50c4afb9
JL		 2748 else {
2749 u16 capab = le16_to_cpu(mgmt->u.beacon.capab_info);
2750 changed |= ieee80211_handle_protect_preamb(sdata, false,
2751 (capab & WLAN_CAPABILITY_SHORT_PREAMBLE) != 0);
2752 }
f0706e82 2753
d3c990fb 2754 if (elems.ht_cap_elem && elems.ht_info_elem &&
38668c05 2755 elems.wmm_param && conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
d3c990fb
RR		 2756 struct ieee80211_ht_bss_info bss_info;
2757
2758 ieee80211_ht_addt_info_ie_to_ht_bss_info(
2759 (struct ieee80211_ht_addt_info *)
2760 elems.ht_info_elem, &bss_info);
38668c05
TW		 2761 changed |= ieee80211_handle_ht(local, 1, &conf->ht_conf,
2762 &bss_info);
d3c990fb
RR		 2763 }
2764
471b3efd 2765 ieee80211_bss_info_change_notify(sdata, changed);
f0706e82
JB		 2766}
2767
2768
f698d856 2769static void ieee80211_rx_mgmt_probe_req(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2770 struct ieee80211_if_sta *ifsta,
2771 struct ieee80211_mgmt *mgmt,
2772 size_t len,
2773 struct ieee80211_rx_status *rx_status)
2774{
f698d856 2775 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2776 int tx_last_beacon;
2777 struct sk_buff *skb;
2778 struct ieee80211_mgmt *resp;
2779 u8 *pos, *end;
0795af57
JP		 2780 DECLARE_MAC_BUF(mac);
2781#ifdef CONFIG_MAC80211_IBSS_DEBUG
2782 DECLARE_MAC_BUF(mac2);
2783 DECLARE_MAC_BUF(mac3);
2784#endif
f0706e82 2785
51fb61e7 2786 if (sdata->vif.type != IEEE80211_IF_TYPE_IBSS ||
48c2fc59 2787 ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED ||
f0706e82
JB		 2788 len < 24 + 2 || !ifsta->probe_resp)
2789 return;
2790
2791 if (local->ops->tx_last_beacon)
2792 tx_last_beacon = local->ops->tx_last_beacon(local_to_hw(local));
2793 else
2794 tx_last_beacon = 1;
2795
2796#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 2797 printk(KERN_DEBUG "%s: RX ProbeReq SA=%s DA=%s BSSID="
2798 "%s (tx_last_beacon=%d)\n",
f698d856 2799 sdata->dev->name, print_mac(mac, mgmt->sa), print_mac(mac2, mgmt->da),
0795af57 2800 print_mac(mac3, mgmt->bssid), tx_last_beacon);
f0706e82
JB		 2801#endif /* CONFIG_MAC80211_IBSS_DEBUG */
2802
2803 if (!tx_last_beacon)
2804 return;
2805
2806 if (memcmp(mgmt->bssid, ifsta->bssid, ETH_ALEN) != 0 &&
2807 memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2808 return;
2809
2810 end = ((u8 *) mgmt) + len;
2811 pos = mgmt->u.probe_req.variable;
2812 if (pos[0] != WLAN_EID_SSID ||
2813 pos + 2 + pos[1] > end) {
f4ea83dd
JB		 2814#ifdef CONFIG_MAC80211_IBSS_DEBUG
2815 printk(KERN_DEBUG "%s: Invalid SSID IE in ProbeReq "
2816 "from %s\n",
f698d856 2817 sdata->dev->name, print_mac(mac, mgmt->sa));
f4ea83dd 2818#endif
f0706e82
JB		 2819 return;
2820 }
2821 if (pos[1] != 0 &&
2822 (pos[1] != ifsta->ssid_len ||
2823 memcmp(pos + 2, ifsta->ssid, ifsta->ssid_len) != 0)) {
2824 /* Ignore ProbeReq for foreign SSID */
2825 return;
2826 }
2827
2828 /* Reply with ProbeResp */
0ec0b7ac 2829 skb = skb_copy(ifsta->probe_resp, GFP_KERNEL);
f0706e82
JB		 2830 if (!skb)
2831 return;
2832
2833 resp = (struct ieee80211_mgmt *) skb->data;
2834 memcpy(resp->da, mgmt->sa, ETH_ALEN);
2835#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 2836 printk(KERN_DEBUG "%s: Sending ProbeResp to %s\n",
f698d856 2837 sdata->dev->name, print_mac(mac, resp->da));
f0706e82 2838#endif /* CONFIG_MAC80211_IBSS_DEBUG */
f698d856 2839 ieee80211_sta_tx(sdata, skb, 0);
f0706e82
JB		 2840}
2841
f698d856 2842static void ieee80211_rx_mgmt_action(struct ieee80211_sub_if_data *sdata,
4e20cb29
JB		 2843 struct ieee80211_if_sta *ifsta,
2844 struct ieee80211_mgmt *mgmt,
f709fc69
LCC		 2845 size_t len,
2846 struct ieee80211_rx_status *rx_status)
9f985b0e 2847{
f698d856 2848 struct ieee80211_local *local = sdata->local;
f709fc69 2849
9c80d3dc
JB		 2850 /* all categories we currently handle have action_code */
2851 if (len < IEEE80211_MIN_ACTION_SIZE + 1)
9f985b0e
RR		 2852 return;
2853
2854 switch (mgmt->u.action.category) {
b6623486
AK		 2855 case WLAN_CATEGORY_SPECTRUM_MGMT:
2856 if (local->hw.conf.channel->band != IEEE80211_BAND_5GHZ)
2857 break;
5fd12d4d 2858 switch (mgmt->u.action.u.measurement.action_code) {
b6623486
AK		 2859 case WLAN_ACTION_SPCT_MSR_REQ:
2860 if (len < (IEEE80211_MIN_ACTION_SIZE +
2861 sizeof(mgmt->u.action.u.measurement)))
2862 break;
f698d856 2863 ieee80211_sta_process_measurement_req(sdata, mgmt, len);
b6623486
AK		 2864 break;
2865 }
2866 break;
9f985b0e
RR		 2867 case WLAN_CATEGORY_BACK:
2868 switch (mgmt->u.action.u.addba_req.action_code) {
2869 case WLAN_ACTION_ADDBA_REQ:
2870 if (len < (IEEE80211_MIN_ACTION_SIZE +
2871 sizeof(mgmt->u.action.u.addba_req)))
2872 break;
f698d856 2873 ieee80211_sta_process_addba_request(local, mgmt, len);
9f985b0e 2874 break;
eadc8d9e
RR		 2875 case WLAN_ACTION_ADDBA_RESP:
2876 if (len < (IEEE80211_MIN_ACTION_SIZE +
2877 sizeof(mgmt->u.action.u.addba_resp)))
2878 break;
f698d856 2879 ieee80211_sta_process_addba_resp(local, mgmt, len);
eadc8d9e 2880 break;
688b88a4
RR		 2881 case WLAN_ACTION_DELBA:
2882 if (len < (IEEE80211_MIN_ACTION_SIZE +
2883 sizeof(mgmt->u.action.u.delba)))
2884 break;
f698d856 2885 ieee80211_sta_process_delba(sdata, mgmt, len);
688b88a4 2886 break;
9f985b0e
RR		 2887 }
2888 break;
f709fc69 2889 case PLINK_CATEGORY:
902acc78 2890 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2891 mesh_rx_plink_frame(sdata, mgmt, len, rx_status);
f709fc69 2892 break;
f709fc69 2893 case MESH_PATH_SEL_CATEGORY:
902acc78 2894 if (ieee80211_vif_is_mesh(&sdata->vif))
f698d856 2895 mesh_rx_path_sel_frame(sdata, mgmt, len);
f709fc69 2896 break;
9f985b0e
RR		 2897 }
2898}
f0706e82 2899
f698d856 2900void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
f0706e82
JB		 2901 struct ieee80211_rx_status *rx_status)
2902{
f698d856 2903 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 2904 struct ieee80211_if_sta *ifsta;
2905 struct ieee80211_mgmt *mgmt;
2906 u16 fc;
2907
2908 if (skb->len < 24)
2909 goto fail;
2910
f0706e82
JB		 2911 ifsta = &sdata->u.sta;
2912
2913 mgmt = (struct ieee80211_mgmt *) skb->data;
2914 fc = le16_to_cpu(mgmt->frame_control);
2915
2916 switch (fc & IEEE80211_FCTL_STYPE) {
2917 case IEEE80211_STYPE_PROBE_REQ:
2918 case IEEE80211_STYPE_PROBE_RESP:
2919 case IEEE80211_STYPE_BEACON:
f709fc69 2920 case IEEE80211_STYPE_ACTION:
f0706e82
JB		 2921 memcpy(skb->cb, rx_status, sizeof(*rx_status));
2922 case IEEE80211_STYPE_AUTH:
2923 case IEEE80211_STYPE_ASSOC_RESP:
2924 case IEEE80211_STYPE_REASSOC_RESP:
2925 case IEEE80211_STYPE_DEAUTH:
2926 case IEEE80211_STYPE_DISASSOC:
2927 skb_queue_tail(&ifsta->skb_queue, skb);
2928 queue_work(local->hw.workqueue, &ifsta->work);
2929 return;
f0706e82
JB		 2930 }
2931
2932 fail:
2933 kfree_skb(skb);
2934}
2935
f698d856 2936static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 2937 struct sk_buff *skb)
2938{
2939 struct ieee80211_rx_status *rx_status;
f0706e82
JB		 2940 struct ieee80211_if_sta *ifsta;
2941 struct ieee80211_mgmt *mgmt;
2942 u16 fc;
2943
f0706e82
JB		 2944 ifsta = &sdata->u.sta;
2945
2946 rx_status = (struct ieee80211_rx_status *) skb->cb;
2947 mgmt = (struct ieee80211_mgmt *) skb->data;
2948 fc = le16_to_cpu(mgmt->frame_control);
2949
2950 switch (fc & IEEE80211_FCTL_STYPE) {
2951 case IEEE80211_STYPE_PROBE_REQ:
f698d856 2952 ieee80211_rx_mgmt_probe_req(sdata, ifsta, mgmt, skb->len,
f0706e82
JB		 2953 rx_status);
2954 break;
2955 case IEEE80211_STYPE_PROBE_RESP:
f698d856 2956 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2957 break;
2958 case IEEE80211_STYPE_BEACON:
f698d856 2959 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
f0706e82
JB		 2960 break;
2961 case IEEE80211_STYPE_AUTH:
f698d856 2962 ieee80211_rx_mgmt_auth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2963 break;
2964 case IEEE80211_STYPE_ASSOC_RESP:
471b3efd 2965 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 0);
f0706e82
JB		 2966 break;
2967 case IEEE80211_STYPE_REASSOC_RESP:
471b3efd 2968 ieee80211_rx_mgmt_assoc_resp(sdata, ifsta, mgmt, skb->len, 1);
f0706e82
JB		 2969 break;
2970 case IEEE80211_STYPE_DEAUTH:
f698d856 2971 ieee80211_rx_mgmt_deauth(sdata, ifsta, mgmt, skb->len);
f0706e82
JB		 2972 break;
2973 case IEEE80211_STYPE_DISASSOC:
f698d856 2974 ieee80211_rx_mgmt_disassoc(sdata, ifsta, mgmt, skb->len);
f0706e82 2975 break;
9f985b0e 2976 case IEEE80211_STYPE_ACTION:
f698d856 2977 ieee80211_rx_mgmt_action(sdata, ifsta, mgmt, skb->len, rx_status);
9f985b0e 2978 break;
f0706e82
JB		 2979 }
2980
2981 kfree_skb(skb);
2982}
2983
2984
9ae54c84 2985ieee80211_rx_result
f698d856 2986ieee80211_sta_rx_scan(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
ece8eddd 2987 struct ieee80211_rx_status *rx_status)
f0706e82
JB		 2988{
2989 struct ieee80211_mgmt *mgmt;
4e3996fe 2990 __le16 fc;
f0706e82 2991
ece8eddd 2992 if (skb->len < 2)
e4c26add 2993 return RX_DROP_UNUSABLE;
f0706e82
JB		 2994
2995 mgmt = (struct ieee80211_mgmt *) skb->data;
4e3996fe 2996 fc = mgmt->frame_control;
f0706e82 2997
4e3996fe 2998 if (ieee80211_is_ctl(fc))
9ae54c84 2999 return RX_CONTINUE;
ece8eddd
ZY		 3000
3001 if (skb->len < 24)
e4c26add 3002 return RX_DROP_MONITOR;
ece8eddd 3003
4e3996fe 3004 if (ieee80211_is_probe_resp(fc)) {
f698d856 3005 ieee80211_rx_mgmt_probe_resp(sdata, mgmt, skb->len, rx_status);
4e3996fe
HH		 3006 dev_kfree_skb(skb);
3007 return RX_QUEUED;
f0706e82 3008 }
4e3996fe
HH		 3009
3010 if (ieee80211_is_beacon(fc)) {
f698d856 3011 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
4e3996fe
HH		 3012 dev_kfree_skb(skb);
3013 return RX_QUEUED;
3014 }
3015
9ae54c84 3016 return RX_CONTINUE;
f0706e82
JB		 3017}
3018
3019
f698d856 3020static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata)
f0706e82 3021{
f698d856 3022 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3023 int active = 0;
3024 struct sta_info *sta;
3025
d0709a65
JB		 3026 rcu_read_lock();
3027
3028 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3029 if (sta->sdata == sdata &&
f0706e82
JB		 3030 time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
3031 jiffies)) {
3032 active++;
3033 break;
3034 }
3035 }
d0709a65
JB		 3036
3037 rcu_read_unlock();
f0706e82
JB		 3038
3039 return active;
3040}
3041
3042
f698d856 3043static void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time)
f0706e82 3044{
f698d856 3045 struct ieee80211_local *local = sdata->local;
f0706e82 3046 struct sta_info *sta, *tmp;
be8755e1 3047 LIST_HEAD(tmp_list);
0795af57 3048 DECLARE_MAC_BUF(mac);
d0709a65 3049 unsigned long flags;
f0706e82 3050
d0709a65 3051 spin_lock_irqsave(&local->sta_lock, flags);
f0706e82 3052 list_for_each_entry_safe(sta, tmp, &local->sta_list, list)
f709fc69 3053 if (time_after(jiffies, sta->last_rx + exp_time)) {
f4ea83dd 3054#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57 3055 printk(KERN_DEBUG "%s: expiring inactive STA %s\n",
f698d856 3056 sdata->dev->name, print_mac(mac, sta->addr));
f4ea83dd 3057#endif
cb585bcc 3058 __sta_info_unlink(&sta);
d0709a65
JB		 3059 if (sta)
3060 list_add(&sta->list, &tmp_list);
f0706e82 3061 }
d0709a65 3062 spin_unlock_irqrestore(&local->sta_lock, flags);
be8755e1 3063
d0709a65
JB		 3064 list_for_each_entry_safe(sta, tmp, &tmp_list, list)
3065 sta_info_destroy(sta);
f0706e82
JB		 3066}
3067
3068
f698d856 3069static void ieee80211_sta_merge_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3070 struct ieee80211_if_sta *ifsta)
3071{
3072 mod_timer(&ifsta->timer, jiffies + IEEE80211_IBSS_MERGE_INTERVAL);
3073
f698d856
JBG		 3074 ieee80211_sta_expire(sdata, IEEE80211_IBSS_INACTIVITY_LIMIT);
3075 if (ieee80211_sta_active_ibss(sdata))
f0706e82
JB		 3076 return;
3077
3078 printk(KERN_DEBUG "%s: No active IBSS STAs - trying to scan for other "
f698d856
JBG		 3079 "IBSS networks with same SSID (merge)\n", sdata->dev->name);
3080 ieee80211_sta_req_scan(sdata, ifsta->ssid, ifsta->ssid_len);
f0706e82
JB		 3081}
3082
3083
f709fc69 3084#ifdef CONFIG_MAC80211_MESH
f698d856 3085static void ieee80211_mesh_housekeeping(struct ieee80211_sub_if_data *sdata,
f709fc69
LCC		 3086 struct ieee80211_if_sta *ifsta)
3087{
f709fc69
LCC		 3088 bool free_plinks;
3089
f698d856
JBG		 3090 ieee80211_sta_expire(sdata, IEEE80211_MESH_PEER_INACTIVITY_LIMIT);
3091 mesh_path_expire(sdata);
f709fc69
LCC		 3092
3093 free_plinks = mesh_plink_availables(sdata);
3094 if (free_plinks != sdata->u.sta.accepting_plinks)
9d139c81 3095 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3096
3097 mod_timer(&ifsta->timer, jiffies +
3098 IEEE80211_MESH_HOUSEKEEPING_INTERVAL);
3099}
3100
3101
f698d856 3102void ieee80211_start_mesh(struct ieee80211_sub_if_data *sdata)
f709fc69
LCC		 3103{
3104 struct ieee80211_if_sta *ifsta;
f709fc69 3105 ifsta = &sdata->u.sta;
48c2fc59 3106 ifsta->state = IEEE80211_STA_MLME_MESH_UP;
f709fc69 3107 ieee80211_sta_timer((unsigned long)sdata);
56a6d13d 3108 ieee80211_if_config(sdata, IEEE80211_IFCC_BEACON);
f709fc69
LCC		 3109}
3110#endif
3111
3112
f0706e82
JB		 3113void ieee80211_sta_timer(unsigned long data)
3114{
60f8b39c
JB		 3115 struct ieee80211_sub_if_data *sdata =
3116 (struct ieee80211_sub_if_data *) data;
3117 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3118 struct ieee80211_local *local = sdata->local;
f0706e82 3119
60f8b39c
JB		 3120 set_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3121 queue_work(local->hw.workqueue, &ifsta->work);
f0706e82
JB		 3122}
3123
f698d856 3124static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3125 struct ieee80211_if_sta *ifsta)
3126{
f698d856 3127 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3128
3129 if (local->ops->reset_tsf) {
3130 /* Reset own TSF to allow time synchronization work. */
3131 local->ops->reset_tsf(local_to_hw(local));
3132 }
3133
3134 ifsta->wmm_last_param_set = -1; /* allow any WMM update */
3135
3136
3137 if (ifsta->auth_algs & IEEE80211_AUTH_ALG_OPEN)
3138 ifsta->auth_alg = WLAN_AUTH_OPEN;
3139 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_SHARED_KEY)
3140 ifsta->auth_alg = WLAN_AUTH_SHARED_KEY;
3141 else if (ifsta->auth_algs & IEEE80211_AUTH_ALG_LEAP)
3142 ifsta->auth_alg = WLAN_AUTH_LEAP;
3143 else
3144 ifsta->auth_alg = WLAN_AUTH_OPEN;
f0706e82 3145 ifsta->auth_transaction = -1;
d6f2da5b 3146 ifsta->flags &= ~IEEE80211_STA_ASSOCIATED;
6042a3e3 3147 ifsta->assoc_scan_tries = 0;
9859b81e 3148 ifsta->direct_probe_tries = 0;
6042a3e3
RR		 3149 ifsta->auth_tries = 0;
3150 ifsta->assoc_tries = 0;
24e64622 3151 netif_tx_stop_all_queues(sdata->dev);
f698d856 3152 netif_carrier_off(sdata->dev);
f0706e82
JB		 3153}
3154
3155
f698d856 3156void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3157 struct ieee80211_if_sta *ifsta)
3158{
f698d856 3159 struct ieee80211_local *local = sdata->local;
f0706e82 3160
51fb61e7 3161 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3162 return;
3163
d6f2da5b 3164 if ((ifsta->flags & (IEEE80211_STA_BSSID_SET |
3b7ee69d 3165 IEEE80211_STA_AUTO_BSSID_SEL)) &&
d6f2da5b 3166 (ifsta->flags & (IEEE80211_STA_SSID_SET |
3b7ee69d
TW		 3167 IEEE80211_STA_AUTO_SSID_SEL))) {
3168
3169 if (ifsta->state == IEEE80211_STA_MLME_ASSOCIATED)
3170 ieee80211_set_disassoc(sdata, ifsta, true, true,
3171 WLAN_REASON_DEAUTH_LEAVING);
3172
f0706e82
JB		 3173 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3174 queue_work(local->hw.workqueue, &ifsta->work);
3175 }
3176}
3177
3178static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
3179 const char *ssid, int ssid_len)
3180{
3181 int tmp, hidden_ssid;
3182
48225709
MW		 3183 if (ssid_len == ifsta->ssid_len &&
3184 !memcmp(ifsta->ssid, ssid, ssid_len))
f0706e82
JB		 3185 return 1;
3186
d6f2da5b 3187 if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
f0706e82
JB		 3188 return 0;
3189
3190 hidden_ssid = 1;
3191 tmp = ssid_len;
3192 while (tmp--) {
3193 if (ssid[tmp] != '\0') {
3194 hidden_ssid = 0;
3195 break;
3196 }
3197 }
3198
3199 if (hidden_ssid && ifsta->ssid_len == ssid_len)
3200 return 1;
3201
3202 if (ssid_len == 1 && ssid[0] == ' ')
3203 return 1;
3204
3205 return 0;
3206}
3207
f698d856 3208static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3209 struct ieee80211_if_sta *ifsta)
3210{
f698d856 3211 struct ieee80211_local *local = sdata->local;
f0706e82 3212 struct ieee80211_sta_bss *bss;
8318d78a 3213 struct ieee80211_supported_band *sband;
f0706e82
JB		 3214 u8 bssid[ETH_ALEN], *pos;
3215 int i;
167ad6f7 3216 int ret;
0795af57 3217 DECLARE_MAC_BUF(mac);
f0706e82
JB		 3218
3219#if 0
3220 /* Easier testing, use fixed BSSID. */
3221 memset(bssid, 0xfe, ETH_ALEN);
3222#else
3223 /* Generate random, not broadcast, locally administered BSSID. Mix in
3224 * own MAC address to make sure that devices that do not have proper
3225 * random number generator get different BSSID. */
3226 get_random_bytes(bssid, ETH_ALEN);
3227 for (i = 0; i < ETH_ALEN; i++)
f698d856 3228 bssid[i] ^= sdata->dev->dev_addr[i];
f0706e82
JB		 3229 bssid[0] &= ~0x01;
3230 bssid[0] |= 0x02;
3231#endif
3232
0795af57 3233 printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %s\n",
f698d856 3234 sdata->dev->name, print_mac(mac, bssid));
f0706e82 3235
f698d856 3236 bss = ieee80211_rx_bss_add(sdata, bssid,
8318d78a 3237 local->hw.conf.channel->center_freq,
cffdd30d 3238 sdata->u.sta.ssid, sdata->u.sta.ssid_len);
f0706e82
JB		 3239 if (!bss)
3240 return -ENOMEM;
3241
8318d78a
JB		 3242 bss->band = local->hw.conf.channel->band;
3243 sband = local->hw.wiphy->bands[bss->band];
f0706e82
JB		 3244
3245 if (local->hw.conf.beacon_int == 0)
dc0ae30c 3246 local->hw.conf.beacon_int = 100;
f0706e82 3247 bss->beacon_int = local->hw.conf.beacon_int;
f0706e82
JB		 3248 bss->last_update = jiffies;
3249 bss->capability = WLAN_CAPABILITY_IBSS;
988c0f72
JB		 3250
3251 if (sdata->default_key)
f0706e82 3252 bss->capability |= WLAN_CAPABILITY_PRIVACY;
988c0f72 3253 else
f0706e82 3254 sdata->drop_unencrypted = 0;
988c0f72 3255
8318d78a 3256 bss->supp_rates_len = sband->n_bitrates;
f0706e82 3257 pos = bss->supp_rates;
8318d78a
JB		 3258 for (i = 0; i < sband->n_bitrates; i++) {
3259 int rate = sband->bitrates[i].bitrate;
f0706e82
JB		 3260 *pos++ = (u8) (rate / 5);
3261 }
3262
f698d856 3263 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 3264 ieee80211_rx_bss_put(local, bss);
167ad6f7 3265 return ret;
f0706e82
JB		 3266}
3267
3268
f698d856 3269static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
f0706e82
JB		 3270 struct ieee80211_if_sta *ifsta)
3271{
f698d856 3272 struct ieee80211_local *local = sdata->local;
f0706e82
JB		 3273 struct ieee80211_sta_bss *bss;
3274 int found = 0;
3275 u8 bssid[ETH_ALEN];
3276 int active_ibss;
0795af57
JP		 3277 DECLARE_MAC_BUF(mac);
3278 DECLARE_MAC_BUF(mac2);
f0706e82
JB		 3279
3280 if (ifsta->ssid_len == 0)
3281 return -EINVAL;
3282
f698d856 3283 active_ibss = ieee80211_sta_active_ibss(sdata);
f0706e82
JB		 3284#ifdef CONFIG_MAC80211_IBSS_DEBUG
3285 printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
f698d856 3286 sdata->dev->name, active_ibss);
f0706e82
JB		 3287#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3288 spin_lock_bh(&local->sta_bss_lock);
3289 list_for_each_entry(bss, &local->sta_bss_list, list) {
3290 if (ifsta->ssid_len != bss->ssid_len ||
3291 memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
3292 || !(bss->capability & WLAN_CAPABILITY_IBSS))
3293 continue;
3294#ifdef CONFIG_MAC80211_IBSS_DEBUG
0795af57
JP		 3295 printk(KERN_DEBUG " bssid=%s found\n",
3296 print_mac(mac, bss->bssid));
f0706e82
JB		 3297#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3298 memcpy(bssid, bss->bssid, ETH_ALEN);
3299 found = 1;
3300 if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
3301 break;
3302 }
3303 spin_unlock_bh(&local->sta_bss_lock);
3304
3305#ifdef CONFIG_MAC80211_IBSS_DEBUG
6e43829b
VK		 3306 if (found)
3307 printk(KERN_DEBUG " sta_find_ibss: selected %s current "
3308 "%s\n", print_mac(mac, bssid),
3309 print_mac(mac2, ifsta->bssid));
f0706e82 3310#endif /* CONFIG_MAC80211_IBSS_DEBUG */
80693ceb
DD		 3311
3312 if (found && memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
167ad6f7 3313 int ret;
80693ceb
DD		 3314 int search_freq;
3315
3316 if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
3317 search_freq = bss->freq;
3318 else
3319 search_freq = local->hw.conf.channel->center_freq;
3320
f698d856 3321 bss = ieee80211_rx_bss_get(local, bssid, search_freq,
80693ceb
DD		 3322 ifsta->ssid, ifsta->ssid_len);
3323 if (!bss)
3324 goto dont_join;
3325
0795af57 3326 printk(KERN_DEBUG "%s: Selected IBSS BSSID %s"
f0706e82 3327 " based on configured SSID\n",
f698d856
JBG		 3328 sdata->dev->name, print_mac(mac, bssid));
3329 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
3e122be0 3330 ieee80211_rx_bss_put(local, bss);
167ad6f7 3331 return ret;
f0706e82 3332 }
80693ceb
DD		 3333
3334dont_join:
f0706e82
JB		 3335#ifdef CONFIG_MAC80211_IBSS_DEBUG
3336 printk(KERN_DEBUG " did not try to join ibss\n");
3337#endif /* CONFIG_MAC80211_IBSS_DEBUG */
3338
3339 /* Selected IBSS not found in current scan results - try to scan */
48c2fc59 3340 if (ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED &&
f698d856 3341 !ieee80211_sta_active_ibss(sdata)) {
f0706e82
JB		 3342 mod_timer(&ifsta->timer, jiffies +
3343 IEEE80211_IBSS_MERGE_INTERVAL);
3344 } else if (time_after(jiffies, local->last_scan_completed +
3345 IEEE80211_SCAN_INTERVAL)) {
3346 printk(KERN_DEBUG "%s: Trigger new scan to find an IBSS to "
f698d856
JBG		 3347 "join\n", sdata->dev->name);
3348 return ieee80211_sta_req_scan(sdata, ifsta->ssid,
f0706e82 3349 ifsta->ssid_len);
48c2fc59 3350 } else if (ifsta->state != IEEE80211_STA_MLME_IBSS_JOINED) {
f0706e82
JB		 3351 int interval = IEEE80211_SCAN_INTERVAL;
3352
3353 if (time_after(jiffies, ifsta->ibss_join_req +
3354 IEEE80211_IBSS_JOIN_TIMEOUT)) {
d6f2da5b 3355 if ((ifsta->flags & IEEE80211_STA_CREATE_IBSS) &&
8318d78a
JB		 3356 (!(local->oper_channel->flags &
3357 IEEE80211_CHAN_NO_IBSS)))
f698d856 3358 return ieee80211_sta_create_ibss(sdata, ifsta);
d6f2da5b 3359 if (ifsta->flags & IEEE80211_STA_CREATE_IBSS) {
8318d78a 3360 printk(KERN_DEBUG "%s: IBSS not allowed on"
f698d856 3361 " %d MHz\n", sdata->dev->name,
8318d78a 3362 local->hw.conf.channel->center_freq);
f0706e82
JB		 3363 }
3364
3365 /* No IBSS found - decrease scan interval and continue
3366 * scanning. */
3367 interval = IEEE80211_SCAN_INTERVAL_SLOW;
3368 }
3369
48c2fc59 3370 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f0706e82
JB		 3371 mod_timer(&ifsta->timer, jiffies + interval);
3372 return 0;
3373 }
3374
3375 return 0;
3376}
3377
3378
f698d856 3379int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len)
f0706e82 3380{
f0706e82 3381 struct ieee80211_if_sta *ifsta;
9d139c81 3382 int res;
f0706e82
JB		 3383
3384 if (len > IEEE80211_MAX_SSID_LEN)
3385 return -EINVAL;
3386
f0706e82
JB		 3387 ifsta = &sdata->u.sta;
3388
9d139c81
JB		 3389 if (ifsta->ssid_len != len || memcmp(ifsta->ssid, ssid, len) != 0) {
3390 memset(ifsta->ssid, 0, sizeof(ifsta->ssid));
3391 memcpy(ifsta->ssid, ssid, len);
3392 ifsta->ssid_len = len;
d6f2da5b 3393 ifsta->flags &= ~IEEE80211_STA_PREV_BSSID_SET;
9d139c81
JB		 3394
3395 res = 0;
3396 /*
3397 * Hack! MLME code needs to be cleaned up to have different
3398 * entry points for configuration and internal selection change
3399 */
3400 if (netif_running(sdata->dev))
3401 res = ieee80211_if_config(sdata, IEEE80211_IFCC_SSID);
3402 if (res) {
3403 printk(KERN_DEBUG "%s: Failed to config new SSID to "
f698d856 3404 "the low-level driver\n", sdata->dev->name);
9d139c81
JB		 3405 return res;
3406 }
3407 }
f0706e82 3408
d6f2da5b
JS		 3409 if (len)
3410 ifsta->flags |= IEEE80211_STA_SSID_SET;
3411 else
3412 ifsta->flags &= ~IEEE80211_STA_SSID_SET;
9d139c81 3413
51fb61e7 3414 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS &&
d6f2da5b 3415 !(ifsta->flags & IEEE80211_STA_BSSID_SET)) {
f0706e82 3416 ifsta->ibss_join_req = jiffies;
48c2fc59 3417 ifsta->state = IEEE80211_STA_MLME_IBSS_SEARCH;
f698d856 3418 return ieee80211_sta_find_ibss(sdata, ifsta);
f0706e82 3419 }
9d139c81 3420
f0706e82
JB		 3421 return 0;
3422}
3423
3424
f698d856 3425int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len)
f0706e82 3426{
f0706e82
JB		 3427 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3428 memcpy(ssid, ifsta->ssid, ifsta->ssid_len);
3429 *len = ifsta->ssid_len;
3430 return 0;
3431}
3432
3433
f698d856 3434int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid)
f0706e82 3435{
f0706e82
JB		 3436 struct ieee80211_if_sta *ifsta;
3437 int res;
3438
f0706e82
JB		 3439 ifsta = &sdata->u.sta;
3440
3441 if (memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0) {
3442 memcpy(ifsta->bssid, bssid, ETH_ALEN);
9d139c81
JB		 3443 res = 0;
3444 /*
3445 * Hack! See also ieee80211_sta_set_ssid.
3446 */
3447 if (netif_running(sdata->dev))
3448 res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);
f0706e82
JB		 3449 if (res) {
3450 printk(KERN_DEBUG "%s: Failed to config new BSSID to "
f698d856 3451 "the low-level driver\n", sdata->dev->name);
f0706e82
JB		 3452 return res;
3453 }
3454 }
3455
d6f2da5b
JS		 3456 if (is_valid_ether_addr(bssid))
3457 ifsta->flags |= IEEE80211_STA_BSSID_SET;
f0706e82 3458 else
d6f2da5b
JS		 3459 ifsta->flags &= ~IEEE80211_STA_BSSID_SET;
3460
f0706e82
JB		 3461 return 0;
3462}
3463
3464
f698d856 3465int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata, char *ie, size_t len)
f0706e82 3466{
f0706e82 3467 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
988c0f72 3468
f0706e82
JB		 3469 kfree(ifsta->extra_ie);
3470 if (len == 0) {
3471 ifsta->extra_ie = NULL;
3472 ifsta->extra_ie_len = 0;
3473 return 0;
3474 }
3475 ifsta->extra_ie = kmalloc(len, GFP_KERNEL);
3476 if (!ifsta->extra_ie) {
3477 ifsta->extra_ie_len = 0;
3478 return -ENOMEM;
3479 }
3480 memcpy(ifsta->extra_ie, ie, len);
3481 ifsta->extra_ie_len = len;
3482 return 0;
3483}
3484
3485
f698d856 3486struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
988c0f72 3487 struct sk_buff *skb, u8 *bssid,
87291c02 3488 u8 *addr, u64 supp_rates)
f0706e82 3489{
f698d856 3490 struct ieee80211_local *local = sdata->local;
f0706e82 3491 struct sta_info *sta;
0795af57 3492 DECLARE_MAC_BUF(mac);
87291c02 3493 int band = local->hw.conf.channel->band;
f0706e82
JB		 3494
3495 /* TODO: Could consider removing the least recently used entry and
3496 * allow new one to be added. */
3497 if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
3498 if (net_ratelimit()) {
3499 printk(KERN_DEBUG "%s: No room for a new IBSS STA "
f698d856 3500 "entry %s\n", sdata->dev->name, print_mac(mac, addr));
f0706e82
JB		 3501 }
3502 return NULL;
3503 }
3504
1e188637 3505 if (compare_ether_addr(bssid, sdata->u.sta.bssid))
87291c02
VK		 3506 return NULL;
3507
f4ea83dd 3508#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
0795af57 3509 printk(KERN_DEBUG "%s: Adding new IBSS station %s (dev=%s)\n",
f698d856 3510 wiphy_name(local->hw.wiphy), print_mac(mac, addr), sdata->dev->name);
f4ea83dd 3511#endif
f0706e82 3512
73651ee6
JB		 3513 sta = sta_info_alloc(sdata, addr, GFP_ATOMIC);
3514 if (!sta)
f0706e82
JB		 3515 return NULL;
3516
07346f81 3517 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
238814fd 3518
8e1535d5
EG		 3519 /* make sure mandatory rates are always added */
3520 sta->supp_rates[band] = supp_rates |
3521 ieee80211_sta_get_mandatory_rates(local, band);
f0706e82
JB		 3522
3523 rate_control_rate_init(sta, local);
3524
93e5deb1 3525 if (sta_info_insert(sta))
73651ee6 3526 return NULL;
73651ee6 3527
d0709a65 3528 return sta;
f0706e82
JB		 3529}
3530
3531
60f8b39c
JB		 3532static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
3533 struct ieee80211_if_sta *ifsta)
3534{
3535 struct ieee80211_local *local = sdata->local;
3536 struct ieee80211_sta_bss *bss, *selected = NULL;
3537 int top_rssi = 0, freq;
3538
3539 spin_lock_bh(&local->sta_bss_lock);
3540 freq = local->oper_channel->center_freq;
3541 list_for_each_entry(bss, &local->sta_bss_list, list) {
3542 if (!(bss->capability & WLAN_CAPABILITY_ESS))
3543 continue;
3544
3545 if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
3546 IEEE80211_STA_AUTO_BSSID_SEL |
3547 IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
3548 (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
3549 !!sdata->default_key))
3550 continue;
3551
3552 if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
3553 bss->freq != freq)
3554 continue;
3555
3556 if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
3557 memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
3558 continue;
3559
3560 if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
3561 !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
3562 continue;
3563
3564 if (!selected || top_rssi < bss->signal) {
3565 selected = bss;
3566 top_rssi = bss->signal;
3567 }
3568 }
3569 if (selected)
3570 atomic_inc(&selected->users);
3571 spin_unlock_bh(&local->sta_bss_lock);
3572
3573 if (selected) {
3574 ieee80211_set_freq(sdata, selected->freq);
3575 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
3576 ieee80211_sta_set_ssid(sdata, selected->ssid,
3577 selected->ssid_len);
3578 ieee80211_sta_set_bssid(sdata, selected->bssid);
3579 ieee80211_sta_def_wmm_params(sdata, selected, 0);
3580
3581 /* Send out direct probe if no probe resp was received or
3582 * the one we have is outdated
3583 */
3584 if (!selected->last_probe_resp ||
3585 time_after(jiffies, selected->last_probe_resp
3586 + IEEE80211_SCAN_RESULT_EXPIRE))
3587 ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
3588 else
3589 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3590
3591 ieee80211_rx_bss_put(local, selected);
3592 ieee80211_sta_reset_auth(sdata, ifsta);
3593 return 0;
3594 } else {
3595 if (ifsta->assoc_scan_tries < IEEE80211_ASSOC_SCANS_MAX_TRIES) {
3596 ifsta->assoc_scan_tries++;
3597 if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL)
3598 ieee80211_sta_start_scan(sdata, NULL, 0);
3599 else
3600 ieee80211_sta_start_scan(sdata, ifsta->ssid,
3601 ifsta->ssid_len);
3602 ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
3603 set_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request);
3604 } else
3605 ifsta->state = IEEE80211_STA_MLME_DISABLED;
3606 }
3607 return -1;
3608}
3609
3610
f698d856 3611int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 3612{
f0706e82
JB		 3613 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3614
f4ea83dd 3615 printk(KERN_DEBUG "%s: deauthenticating by local choice (reason=%d)\n",
f698d856 3616 sdata->dev->name, reason);
f0706e82 3617
51fb61e7
JB		 3618 if (sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3619 sdata->vif.type != IEEE80211_IF_TYPE_IBSS)
f0706e82
JB		 3620 return -EINVAL;
3621
aa458d17 3622 ieee80211_set_disassoc(sdata, ifsta, true, true, reason);
f0706e82
JB		 3623 return 0;
3624}
3625
3626
f698d856 3627int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason)
f0706e82 3628{
f0706e82
JB		 3629 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
3630
f4ea83dd 3631 printk(KERN_DEBUG "%s: disassociating by local choice (reason=%d)\n",
f698d856 3632 sdata->dev->name, reason);
f0706e82 3633
51fb61e7 3634 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
f0706e82
JB		 3635 return -EINVAL;
3636
d6f2da5b 3637 if (!(ifsta->flags & IEEE80211_STA_ASSOCIATED))
f0706e82
JB		 3638 return -1;
3639
aa458d17 3640 ieee80211_set_disassoc(sdata, ifsta, false, true, reason);
f0706e82
JB		 3641 return 0;
3642}
84363e6e
MA		 3643
3644void ieee80211_notify_mac(struct ieee80211_hw *hw,
3645 enum ieee80211_notification_types notif_type)
3646{
3647 struct ieee80211_local *local = hw_to_local(hw);
3648 struct ieee80211_sub_if_data *sdata;
3649
3650 switch (notif_type) {
3651 case IEEE80211_NOTIFY_RE_ASSOC:
3652 rcu_read_lock();
3653 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3e122be0
JB		 3654 if (sdata->vif.type != IEEE80211_IF_TYPE_STA)
3655 continue;
84363e6e 3656
f698d856 3657 ieee80211_sta_req_auth(sdata, &sdata->u.sta);
84363e6e
MA		 3658 }
3659 rcu_read_unlock();
3660 break;
3661 }
3662}
3663EXPORT_SYMBOL(ieee80211_notify_mac);
60f8b39c
JB		 3664
3665void ieee80211_sta_work(struct work_struct *work)
3666{
3667 struct ieee80211_sub_if_data *sdata =
3668 container_of(work, struct ieee80211_sub_if_data, u.sta.work);
3669 struct ieee80211_local *local = sdata->local;
3670 struct ieee80211_if_sta *ifsta;
3671 struct sk_buff *skb;
3672
3673 if (!netif_running(sdata->dev))
3674 return;
3675
3676 if (local->sta_sw_scanning || local->sta_hw_scanning)
3677 return;
3678
3679 if (WARN_ON(sdata->vif.type != IEEE80211_IF_TYPE_STA &&
3680 sdata->vif.type != IEEE80211_IF_TYPE_IBSS &&
3681 sdata->vif.type != IEEE80211_IF_TYPE_MESH_POINT))
3682 return;
3683 ifsta = &sdata->u.sta;
3684
3685 while ((skb = skb_dequeue(&ifsta->skb_queue)))
3686 ieee80211_sta_rx_queued_mgmt(sdata, skb);
3687
3688#ifdef CONFIG_MAC80211_MESH
3689 if (ifsta->preq_queue_len &&
3690 time_after(jiffies,
3691 ifsta->last_preq + msecs_to_jiffies(ifsta->mshcfg.dot11MeshHWMPpreqMinInterval)))
3692 mesh_path_start_discovery(sdata);
3693#endif
3694
3695 if (ifsta->state != IEEE80211_STA_MLME_DIRECT_PROBE &&
3696 ifsta->state != IEEE80211_STA_MLME_AUTHENTICATE &&
3697 ifsta->state != IEEE80211_STA_MLME_ASSOCIATE &&
3698 test_and_clear_bit(IEEE80211_STA_REQ_SCAN, &ifsta->request)) {
3699 if (ifsta->scan_ssid_len)
3700 ieee80211_sta_start_scan(sdata, ifsta->scan_ssid, ifsta->scan_ssid_len);
3701 else
3702 ieee80211_sta_start_scan(sdata, NULL, 0);
3703 return;
3704 }
3705
3706 if (test_and_clear_bit(IEEE80211_STA_REQ_AUTH, &ifsta->request)) {
3707 if (ieee80211_sta_config_auth(sdata, ifsta))
3708 return;
3709 clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request);
3710 } else if (!test_and_clear_bit(IEEE80211_STA_REQ_RUN, &ifsta->request))
3711 return;
3712
3713 switch (ifsta->state) {
3714 case IEEE80211_STA_MLME_DISABLED:
3715 break;
3716 case IEEE80211_STA_MLME_DIRECT_PROBE:
3717 ieee80211_direct_probe(sdata, ifsta);
3718 break;
3719 case IEEE80211_STA_MLME_AUTHENTICATE:
3720 ieee80211_authenticate(sdata, ifsta);
3721 break;
3722 case IEEE80211_STA_MLME_ASSOCIATE:
3723 ieee80211_associate(sdata, ifsta);
3724 break;
3725 case IEEE80211_STA_MLME_ASSOCIATED:
3726 ieee80211_associated(sdata, ifsta);
3727 break;
3728 case IEEE80211_STA_MLME_IBSS_SEARCH:
3729 ieee80211_sta_find_ibss(sdata, ifsta);
3730 break;
3731 case IEEE80211_STA_MLME_IBSS_JOINED:
3732 ieee80211_sta_merge_ibss(sdata, ifsta);
3733 break;
3734#ifdef CONFIG_MAC80211_MESH
3735 case IEEE80211_STA_MLME_MESH_UP:
3736 ieee80211_mesh_housekeeping(sdata, ifsta);
3737 break;
3738#endif
3739 default:
3740 WARN_ON(1);
3741 break;
3742 }
3743
3744 if (ieee80211_privacy_mismatch(sdata, ifsta)) {
3745 printk(KERN_DEBUG "%s: privacy configuration mismatch and "
3746 "mixed-cell disabled - disassociate\n", sdata->dev->name);
3747
3748 ieee80211_set_disassoc(sdata, ifsta, false, true,
3749 WLAN_REASON_UNSPECIFIED);
3750 }
3751}
0a51b27e
JB		 3752
3753void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3754{
3755 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
3756 struct ieee80211_if_sta *ifsta;
3757
3758 if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
3759 ifsta = &sdata->u.sta;
3760 if (!(ifsta->flags & IEEE80211_STA_BSSID_SET) ||
3761 (!(ifsta->state == IEEE80211_STA_MLME_IBSS_JOINED) &&
3762 !ieee80211_sta_active_ibss(sdata)))
3763 ieee80211_sta_find_ibss(sdata, ifsta);
3764 }
3765}
Linux kernel - Deliverables
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