blob: 4aefa6dc3091612eb8cbbb4fba0fdbd00a218428 [file] [log] [blame]
Jiri Bencf0706e82007-05-05 11:45:53 -07001/*
2 * BSS client mode implementation
Jouni Malinen5394af42009-01-08 13:31:59 +02003 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
Jiri Bencf0706e82007-05-05 11:45:53 -07004 * 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
Geert Uytterhoeven5b323ed2007-05-08 18:40:27 -070014#include <linux/delay.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070015#include <linux/if_ether.h>
16#include <linux/skbuff.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070017#include <linux/if_arp.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070018#include <linux/etherdevice.h>
Johannes Bergd0709a62008-02-25 16:27:46 +010019#include <linux/rtnetlink.h>
Johannes Berg10f644a2009-04-16 13:17:25 +020020#include <linux/pm_qos_params.h>
Johannes Bergd91f36d2009-04-16 13:17:26 +020021#include <linux/crc32.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090022#include <linux/slab.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070023#include <net/mac80211.h>
Johannes Berg472dbc42008-09-11 00:01:49 +020024#include <asm/unaligned.h>
Johannes Berg60f8b392008-09-08 17:44:22 +020025
Jiri Bencf0706e82007-05-05 11:45:53 -070026#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020027#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040028#include "rate.h"
29#include "led.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070030
Maxim Levitskya43abf22009-07-31 18:54:12 +030031#define IEEE80211_MAX_PROBE_TRIES 5
Johannes Bergb291ba12009-07-10 15:29:03 +020032
33/*
34 * beacon loss detection timeout
35 * XXX: should depend on beacon interval
36 */
37#define IEEE80211_BEACON_LOSS_TIME (2 * HZ)
38/*
39 * Time the connection can be idle before we probe
40 * it to see if we can still talk to the AP.
41 */
Maxim Levitskyd1c50912009-07-31 18:54:23 +030042#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
Johannes Bergb291ba12009-07-10 15:29:03 +020043/*
44 * Time we wait for a probe response after sending
45 * a probe request because of beacon loss or for
46 * checking the connection still works.
47 */
Maxim Levitskyd1c50912009-07-31 18:54:23 +030048#define IEEE80211_PROBE_WAIT (HZ / 2)
Jiri Bencf0706e82007-05-05 11:45:53 -070049
Johannes Berg5bb644a2009-05-17 11:40:42 +020050#define TMR_RUNNING_TIMER 0
51#define TMR_RUNNING_CHANSW 1
52
Johannes Berg77fdaa12009-07-07 03:45:17 +020053/*
54 * All cfg80211 functions have to be called outside a locked
55 * section so that they can acquire a lock themselves... This
56 * is much simpler than queuing up things in cfg80211, but we
57 * do need some indirection for that here.
58 */
59enum rx_mgmt_action {
60 /* no action required */
61 RX_MGMT_NONE,
62
63 /* caller must call cfg80211_send_rx_auth() */
64 RX_MGMT_CFG80211_AUTH,
65
66 /* caller must call cfg80211_send_rx_assoc() */
67 RX_MGMT_CFG80211_ASSOC,
68
69 /* caller must call cfg80211_send_deauth() */
70 RX_MGMT_CFG80211_DEAUTH,
71
72 /* caller must call cfg80211_send_disassoc() */
73 RX_MGMT_CFG80211_DISASSOC,
74
Johannes Berg5d1ec852009-12-02 12:43:43 +010075 /* caller must tell cfg80211 about internal error */
76 RX_MGMT_CFG80211_ASSOC_ERROR,
Johannes Berg77fdaa12009-07-07 03:45:17 +020077};
78
Johannes Berg5484e232008-09-08 17:44:27 +020079/* utils */
Johannes Berg77fdaa12009-07-07 03:45:17 +020080static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
81{
82 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
83}
84
Johannes Bergca386f32009-07-10 02:39:48 +020085/*
86 * We can have multiple work items (and connection probing)
87 * scheduling this timer, but we need to take care to only
88 * reschedule it when it should fire _earlier_ than it was
89 * asked for before, or if it's not pending right now. This
90 * function ensures that. Note that it then is required to
91 * run this function for all timeouts after the first one
92 * has happened -- the work that runs from this timer will
93 * do that.
94 */
95static void run_again(struct ieee80211_if_managed *ifmgd,
96 unsigned long timeout)
97{
98 ASSERT_MGD_MTX(ifmgd);
99
100 if (!timer_pending(&ifmgd->timer) ||
101 time_before(timeout, ifmgd->timer.expires))
102 mod_timer(&ifmgd->timer, timeout);
103}
104
Johannes Bergb291ba12009-07-10 15:29:03 +0200105static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
106{
107 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
108 return;
109
110 mod_timer(&sdata->u.mgd.bcn_mon_timer,
111 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
112}
113
Johannes Berg5484e232008-09-08 17:44:27 +0200114static int ecw2cw(int ecw)
Johannes Berg60f8b392008-09-08 17:44:22 +0200115{
Johannes Berg5484e232008-09-08 17:44:27 +0200116 return (1 << ecw) - 1;
Johannes Berg60f8b392008-09-08 17:44:22 +0200117}
118
Johannes Bergd5522e02009-03-30 13:23:35 +0200119/*
120 * ieee80211_enable_ht should be called only after the operating band
121 * has been determined as ht configuration depends on the hw's
122 * HT abilities for a specific band.
123 */
124static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
125 struct ieee80211_ht_info *hti,
Johannes Berg77fdaa12009-07-07 03:45:17 +0200126 const u8 *bssid, u16 ap_ht_cap_flags)
Johannes Bergd5522e02009-03-30 13:23:35 +0200127{
128 struct ieee80211_local *local = sdata->local;
129 struct ieee80211_supported_band *sband;
Johannes Bergd5522e02009-03-30 13:23:35 +0200130 struct sta_info *sta;
131 u32 changed = 0;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200132 u16 ht_opmode;
Johannes Bergd5522e02009-03-30 13:23:35 +0200133 bool enable_ht = true, ht_changed;
134 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
135
136 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
137
Johannes Bergd5522e02009-03-30 13:23:35 +0200138 /* HT is not supported */
139 if (!sband->ht_cap.ht_supported)
140 enable_ht = false;
141
142 /* check that channel matches the right operating channel */
143 if (local->hw.conf.channel->center_freq !=
144 ieee80211_channel_to_frequency(hti->control_chan))
145 enable_ht = false;
146
147 if (enable_ht) {
148 channel_type = NL80211_CHAN_HT20;
149
150 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
151 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
152 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
153 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
154 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
Luis R. Rodriguez768777e2009-05-02 00:37:19 -0400155 if (!(local->hw.conf.channel->flags &
156 IEEE80211_CHAN_NO_HT40PLUS))
157 channel_type = NL80211_CHAN_HT40PLUS;
Johannes Bergd5522e02009-03-30 13:23:35 +0200158 break;
159 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
Luis R. Rodriguez768777e2009-05-02 00:37:19 -0400160 if (!(local->hw.conf.channel->flags &
161 IEEE80211_CHAN_NO_HT40MINUS))
162 channel_type = NL80211_CHAN_HT40MINUS;
Johannes Bergd5522e02009-03-30 13:23:35 +0200163 break;
164 }
165 }
166 }
167
168 ht_changed = conf_is_ht(&local->hw.conf) != enable_ht ||
169 channel_type != local->hw.conf.channel_type;
170
Reinette Chatrefe6f2122010-04-19 10:46:31 -0700171 if (local->tmp_channel)
172 local->tmp_channel_type = channel_type;
Johannes Bergd5522e02009-03-30 13:23:35 +0200173 local->oper_channel_type = channel_type;
174
175 if (ht_changed) {
176 /* channel_type change automatically detected */
177 ieee80211_hw_config(local, 0);
178
179 rcu_read_lock();
Johannes Bergabe60632009-11-25 17:46:18 +0100180 sta = sta_info_get(sdata, bssid);
Johannes Bergd5522e02009-03-30 13:23:35 +0200181 if (sta)
182 rate_control_rate_update(local, sband, sta,
Sujith4fa00432010-03-01 14:42:57 +0530183 IEEE80211_RC_HT_CHANGED,
184 local->oper_channel_type);
Johannes Bergd5522e02009-03-30 13:23:35 +0200185 rcu_read_unlock();
Johannes Bergd5522e02009-03-30 13:23:35 +0200186 }
187
188 /* disable HT */
189 if (!enable_ht)
190 return 0;
191
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200192 ht_opmode = le16_to_cpu(hti->operation_mode);
Johannes Bergd5522e02009-03-30 13:23:35 +0200193
194 /* if bss configuration changed store the new one */
Johannes Berg413ad502009-05-08 21:21:06 +0200195 if (!sdata->ht_opmode_valid ||
196 sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
Johannes Bergd5522e02009-03-30 13:23:35 +0200197 changed |= BSS_CHANGED_HT;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200198 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
Johannes Berg413ad502009-05-08 21:21:06 +0200199 sdata->ht_opmode_valid = true;
Johannes Bergd5522e02009-03-30 13:23:35 +0200200 }
201
202 return changed;
203}
204
Johannes Berg9c6bd792008-09-11 00:01:52 +0200205/* frame sending functions */
206
Johannes Bergef422bc2008-09-09 10:58:25 +0200207static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503dd2009-07-07 03:56:11 +0200208 const u8 *bssid, u16 stype, u16 reason,
209 void *cookie)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200210{
211 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100212 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200213 struct sk_buff *skb;
214 struct ieee80211_mgmt *mgmt;
215
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200216 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
Johannes Berg9ac19a92008-09-09 10:57:09 +0200217 if (!skb) {
Johannes Bergef422bc2008-09-09 10:58:25 +0200218 printk(KERN_DEBUG "%s: failed to allocate buffer for "
Johannes Berg47846c92009-11-25 17:46:19 +0100219 "deauth/disassoc frame\n", sdata->name);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200220 return;
221 }
222 skb_reserve(skb, local->hw.extra_tx_headroom);
223
224 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
225 memset(mgmt, 0, 24);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200226 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100227 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200228 memcpy(mgmt->bssid, bssid, ETH_ALEN);
Johannes Bergef422bc2008-09-09 10:58:25 +0200229 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200230 skb_put(skb, 2);
Johannes Bergef422bc2008-09-09 10:58:25 +0200231 /* u.deauth.reason_code == u.disassoc.reason_code */
Johannes Berg9ac19a92008-09-09 10:57:09 +0200232 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
233
Jouni Malinen53b46b82009-03-27 20:53:56 +0200234 if (stype == IEEE80211_STYPE_DEAUTH)
Holger Schurigce470612009-10-13 13:28:13 +0200235 if (cookie)
236 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
237 else
238 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Jouni Malinen53b46b82009-03-27 20:53:56 +0200239 else
Holger Schurigce470612009-10-13 13:28:13 +0200240 if (cookie)
241 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
242 else
243 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg62ae67b2009-11-18 18:42:05 +0100244 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
245 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
246 ieee80211_tx_skb(sdata, skb);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200247}
248
Kalle Valo572e0012009-02-10 17:09:31 +0200249void ieee80211_send_pspoll(struct ieee80211_local *local,
250 struct ieee80211_sub_if_data *sdata)
251{
Kalle Valo572e0012009-02-10 17:09:31 +0200252 struct ieee80211_pspoll *pspoll;
253 struct sk_buff *skb;
Kalle Valo572e0012009-02-10 17:09:31 +0200254
Kalle Valod8cd1892010-01-05 20:16:26 +0200255 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
256 if (!skb)
Kalle Valo572e0012009-02-10 17:09:31 +0200257 return;
Kalle Valo572e0012009-02-10 17:09:31 +0200258
Kalle Valod8cd1892010-01-05 20:16:26 +0200259 pspoll = (struct ieee80211_pspoll *) skb->data;
260 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
Kalle Valo572e0012009-02-10 17:09:31 +0200261
Johannes Berg62ae67b2009-11-18 18:42:05 +0100262 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
263 ieee80211_tx_skb(sdata, skb);
Kalle Valo572e0012009-02-10 17:09:31 +0200264}
265
Johannes Berg965beda2009-04-16 13:17:24 +0200266void ieee80211_send_nullfunc(struct ieee80211_local *local,
267 struct ieee80211_sub_if_data *sdata,
268 int powersave)
269{
270 struct sk_buff *skb;
Kalle Valod8cd1892010-01-05 20:16:26 +0200271 struct ieee80211_hdr_3addr *nullfunc;
Johannes Berg965beda2009-04-16 13:17:24 +0200272
Kalle Valod8cd1892010-01-05 20:16:26 +0200273 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
274 if (!skb)
Johannes Berg965beda2009-04-16 13:17:24 +0200275 return;
276
Kalle Valod8cd1892010-01-05 20:16:26 +0200277 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
Johannes Berg965beda2009-04-16 13:17:24 +0200278 if (powersave)
Kalle Valod8cd1892010-01-05 20:16:26 +0200279 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
Johannes Berg965beda2009-04-16 13:17:24 +0200280
Johannes Berg62ae67b2009-11-18 18:42:05 +0100281 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
282 ieee80211_tx_skb(sdata, skb);
Johannes Berg965beda2009-04-16 13:17:24 +0200283}
284
Felix Fietkaud5242152010-01-08 18:06:26 +0100285static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
286 struct ieee80211_sub_if_data *sdata)
287{
288 struct sk_buff *skb;
289 struct ieee80211_hdr *nullfunc;
290 __le16 fc;
291
292 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
293 return;
294
295 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
296 if (!skb) {
297 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
298 "nullfunc frame\n", sdata->name);
299 return;
300 }
301 skb_reserve(skb, local->hw.extra_tx_headroom);
302
303 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
304 memset(nullfunc, 0, 30);
305 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
306 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
307 nullfunc->frame_control = fc;
308 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
309 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
310 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
311 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
312
313 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
314 ieee80211_tx_skb(sdata, skb);
315}
316
Johannes Bergcc32abd2009-05-15 11:52:31 +0200317/* spectrum management related things */
318static void ieee80211_chswitch_work(struct work_struct *work)
319{
320 struct ieee80211_sub_if_data *sdata =
321 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200322 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
323
Johannes Berg9607e6b2009-12-23 13:15:31 +0100324 if (!ieee80211_sdata_running(sdata))
Johannes Bergcc32abd2009-05-15 11:52:31 +0200325 return;
326
Johannes Berg77fdaa12009-07-07 03:45:17 +0200327 mutex_lock(&ifmgd->mtx);
328 if (!ifmgd->associated)
329 goto out;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200330
331 sdata->local->oper_channel = sdata->local->csa_channel;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200332 ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200333
Johannes Berg77fdaa12009-07-07 03:45:17 +0200334 /* XXX: shouldn't really modify cfg80211-owned data! */
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100335 ifmgd->associated->channel = sdata->local->oper_channel;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200336
Johannes Bergcc32abd2009-05-15 11:52:31 +0200337 ieee80211_wake_queues_by_reason(&sdata->local->hw,
338 IEEE80211_QUEUE_STOP_REASON_CSA);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200339 out:
340 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
341 mutex_unlock(&ifmgd->mtx);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200342}
343
344static void ieee80211_chswitch_timer(unsigned long data)
345{
346 struct ieee80211_sub_if_data *sdata =
347 (struct ieee80211_sub_if_data *) data;
348 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
349
Johannes Berg5bb644a2009-05-17 11:40:42 +0200350 if (sdata->local->quiescing) {
351 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
352 return;
353 }
354
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400355 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200356}
357
358void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
359 struct ieee80211_channel_sw_ie *sw_elem,
360 struct ieee80211_bss *bss)
361{
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100362 struct cfg80211_bss *cbss =
363 container_of((void *)bss, struct cfg80211_bss, priv);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200364 struct ieee80211_channel *new_ch;
365 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
366 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
367
Johannes Berg77fdaa12009-07-07 03:45:17 +0200368 ASSERT_MGD_MTX(ifmgd);
369
370 if (!ifmgd->associated)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200371 return;
372
Helmut Schaafbe9c422009-07-23 12:14:04 +0200373 if (sdata->local->scanning)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200374 return;
375
376 /* Disregard subsequent beacons if we are already running a timer
377 processing a CSA */
378
379 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
380 return;
381
382 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
383 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
384 return;
385
386 sdata->local->csa_channel = new_ch;
387
388 if (sw_elem->count <= 1) {
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400389 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200390 } else {
391 ieee80211_stop_queues_by_reason(&sdata->local->hw,
392 IEEE80211_QUEUE_STOP_REASON_CSA);
393 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
394 mod_timer(&ifmgd->chswitch_timer,
395 jiffies +
396 msecs_to_jiffies(sw_elem->count *
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100397 cbss->beacon_interval));
Johannes Bergcc32abd2009-05-15 11:52:31 +0200398 }
399}
400
401static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
402 u16 capab_info, u8 *pwr_constr_elem,
403 u8 pwr_constr_elem_len)
404{
405 struct ieee80211_conf *conf = &sdata->local->hw.conf;
406
407 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
408 return;
409
410 /* Power constraint IE length should be 1 octet */
411 if (pwr_constr_elem_len != 1)
412 return;
413
414 if ((*pwr_constr_elem <= conf->channel->max_power) &&
415 (*pwr_constr_elem != sdata->local->power_constr_level)) {
416 sdata->local->power_constr_level = *pwr_constr_elem;
417 ieee80211_hw_config(sdata->local, 0);
418 }
419}
420
Johannes Berg965beda2009-04-16 13:17:24 +0200421/* powersave */
422static void ieee80211_enable_ps(struct ieee80211_local *local,
423 struct ieee80211_sub_if_data *sdata)
424{
425 struct ieee80211_conf *conf = &local->hw.conf;
426
Johannes Bergd5edaed2009-04-22 23:02:51 +0200427 /*
428 * If we are scanning right now then the parameters will
429 * take effect when scan finishes.
430 */
Helmut Schaafbe9c422009-07-23 12:14:04 +0200431 if (local->scanning)
Johannes Bergd5edaed2009-04-22 23:02:51 +0200432 return;
433
Johannes Berg965beda2009-04-16 13:17:24 +0200434 if (conf->dynamic_ps_timeout > 0 &&
435 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
436 mod_timer(&local->dynamic_ps_timer, jiffies +
437 msecs_to_jiffies(conf->dynamic_ps_timeout));
438 } else {
439 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
440 ieee80211_send_nullfunc(local, sdata, 1);
Vivek Natarajan375177b2010-02-09 14:50:28 +0530441
Juuso Oikarinen2a130522010-03-09 14:25:02 +0200442 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
443 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
444 return;
445
446 conf->flags |= IEEE80211_CONF_PS;
447 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
Johannes Berg965beda2009-04-16 13:17:24 +0200448 }
449}
450
451static void ieee80211_change_ps(struct ieee80211_local *local)
452{
453 struct ieee80211_conf *conf = &local->hw.conf;
454
455 if (local->ps_sdata) {
Johannes Berg965beda2009-04-16 13:17:24 +0200456 ieee80211_enable_ps(local, local->ps_sdata);
457 } else if (conf->flags & IEEE80211_CONF_PS) {
458 conf->flags &= ~IEEE80211_CONF_PS;
459 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
460 del_timer_sync(&local->dynamic_ps_timer);
461 cancel_work_sync(&local->dynamic_ps_enable_work);
462 }
463}
464
465/* need to hold RTNL or interface lock */
Johannes Berg10f644a2009-04-16 13:17:25 +0200466void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
Johannes Berg965beda2009-04-16 13:17:24 +0200467{
468 struct ieee80211_sub_if_data *sdata, *found = NULL;
469 int count = 0;
470
471 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
472 local->ps_sdata = NULL;
473 return;
474 }
475
Johannes Bergaf6b6372009-12-23 13:15:35 +0100476 if (!list_empty(&local->work_list)) {
477 local->ps_sdata = NULL;
478 goto change;
479 }
480
Johannes Berg965beda2009-04-16 13:17:24 +0200481 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg9607e6b2009-12-23 13:15:31 +0100482 if (!ieee80211_sdata_running(sdata))
Johannes Berg965beda2009-04-16 13:17:24 +0200483 continue;
484 if (sdata->vif.type != NL80211_IFTYPE_STATION)
485 continue;
486 found = sdata;
487 count++;
488 }
489
Luis R. Rodriguez43f78532009-06-10 15:16:15 +0200490 if (count == 1 && found->u.mgd.powersave &&
Johannes Bergaf6b6372009-12-23 13:15:35 +0100491 found->u.mgd.associated &&
Johannes Berg56007a02010-01-26 14:19:52 +0100492 found->u.mgd.associated->beacon_ies &&
Johannes Bergb291ba12009-07-10 15:29:03 +0200493 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
494 IEEE80211_STA_CONNECTION_POLL))) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200495 s32 beaconint_us;
496
497 if (latency < 0)
498 latency = pm_qos_requirement(PM_QOS_NETWORK_LATENCY);
499
500 beaconint_us = ieee80211_tu_to_usec(
501 found->vif.bss_conf.beacon_int);
502
Johannes Berg04fe2032009-04-22 18:44:37 +0200503 if (beaconint_us > latency) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200504 local->ps_sdata = NULL;
Johannes Berg04fe2032009-04-22 18:44:37 +0200505 } else {
Johannes Berg56007a02010-01-26 14:19:52 +0100506 struct ieee80211_bss *bss;
Johannes Berg04fe2032009-04-22 18:44:37 +0200507 int maxslp = 1;
Johannes Berg56007a02010-01-26 14:19:52 +0100508 u8 dtimper;
Johannes Berg04fe2032009-04-22 18:44:37 +0200509
Johannes Berg56007a02010-01-26 14:19:52 +0100510 bss = (void *)found->u.mgd.associated->priv;
511 dtimper = bss->dtim_period;
512
513 /* If the TIM IE is invalid, pretend the value is 1 */
514 if (!dtimper)
515 dtimper = 1;
516 else if (dtimper > 1)
Johannes Berg04fe2032009-04-22 18:44:37 +0200517 maxslp = min_t(int, dtimper,
518 latency / beaconint_us);
519
Johannes Berg9ccebe62009-04-23 10:32:36 +0200520 local->hw.conf.max_sleep_period = maxslp;
Johannes Berg56007a02010-01-26 14:19:52 +0100521 local->hw.conf.ps_dtim_period = dtimper;
Johannes Berg10f644a2009-04-16 13:17:25 +0200522 local->ps_sdata = found;
Johannes Berg04fe2032009-04-22 18:44:37 +0200523 }
Johannes Berg10f644a2009-04-16 13:17:25 +0200524 } else {
Johannes Berg965beda2009-04-16 13:17:24 +0200525 local->ps_sdata = NULL;
Johannes Berg10f644a2009-04-16 13:17:25 +0200526 }
Johannes Berg965beda2009-04-16 13:17:24 +0200527
Johannes Bergaf6b6372009-12-23 13:15:35 +0100528 change:
Johannes Berg965beda2009-04-16 13:17:24 +0200529 ieee80211_change_ps(local);
530}
531
532void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
533{
534 struct ieee80211_local *local =
535 container_of(work, struct ieee80211_local,
536 dynamic_ps_disable_work);
537
538 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
539 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
540 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
541 }
542
543 ieee80211_wake_queues_by_reason(&local->hw,
544 IEEE80211_QUEUE_STOP_REASON_PS);
545}
546
547void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
548{
549 struct ieee80211_local *local =
550 container_of(work, struct ieee80211_local,
551 dynamic_ps_enable_work);
552 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
Vivek Natarajan375177b2010-02-09 14:50:28 +0530553 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg965beda2009-04-16 13:17:24 +0200554
555 /* can only happen when PS was just disabled anyway */
556 if (!sdata)
557 return;
558
559 if (local->hw.conf.flags & IEEE80211_CONF_PS)
560 return;
561
Vivek Natarajan375177b2010-02-09 14:50:28 +0530562 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
563 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
Johannes Berg965beda2009-04-16 13:17:24 +0200564 ieee80211_send_nullfunc(local, sdata, 1);
565
Juuso Oikarinen2a130522010-03-09 14:25:02 +0200566 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
567 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
Vivek Natarajan375177b2010-02-09 14:50:28 +0530568 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
569 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
570 local->hw.conf.flags |= IEEE80211_CONF_PS;
571 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
572 }
Johannes Berg965beda2009-04-16 13:17:24 +0200573}
574
575void ieee80211_dynamic_ps_timer(unsigned long data)
576{
577 struct ieee80211_local *local = (void *) data;
578
Luis R. Rodriguez78f1a8b2009-07-27 08:38:25 -0700579 if (local->quiescing || local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +0200580 return;
581
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400582 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
Johannes Berg965beda2009-04-16 13:17:24 +0200583}
584
Johannes Berg60f8b392008-09-08 17:44:22 +0200585/* MLME */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200586static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Johannes Berg46900292009-02-15 12:44:28 +0100587 struct ieee80211_if_managed *ifmgd,
Jiri Bencf0706e82007-05-05 11:45:53 -0700588 u8 *wmm_param, size_t wmm_param_len)
589{
Jiri Bencf0706e82007-05-05 11:45:53 -0700590 struct ieee80211_tx_queue_params params;
591 size_t left;
592 int count;
Kalle Valoab133152010-01-12 10:42:31 +0200593 u8 *pos, uapsd_queues = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700594
Johannes Bergaf6b6372009-12-23 13:15:35 +0100595 if (local->hw.queues < 4)
Johannes Berg3434fbd2008-05-03 00:59:37 +0200596 return;
597
598 if (!wmm_param)
599 return;
600
Jiri Bencf0706e82007-05-05 11:45:53 -0700601 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
602 return;
Kalle Valoab133152010-01-12 10:42:31 +0200603
604 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
Kalle Valo50ae0cf2010-01-12 10:42:39 +0200605 uapsd_queues = local->uapsd_queues;
Kalle Valoab133152010-01-12 10:42:31 +0200606
Jiri Bencf0706e82007-05-05 11:45:53 -0700607 count = wmm_param[6] & 0x0f;
Johannes Berg46900292009-02-15 12:44:28 +0100608 if (count == ifmgd->wmm_last_param_set)
Jiri Bencf0706e82007-05-05 11:45:53 -0700609 return;
Johannes Berg46900292009-02-15 12:44:28 +0100610 ifmgd->wmm_last_param_set = count;
Jiri Bencf0706e82007-05-05 11:45:53 -0700611
612 pos = wmm_param + 8;
613 left = wmm_param_len - 8;
614
615 memset(&params, 0, sizeof(params));
616
Jiri Bencf0706e82007-05-05 11:45:53 -0700617 local->wmm_acm = 0;
618 for (; left >= 4; left -= 4, pos += 4) {
619 int aci = (pos[0] >> 5) & 0x03;
620 int acm = (pos[0] >> 4) & 0x01;
Kalle Valoab133152010-01-12 10:42:31 +0200621 bool uapsd = false;
Jiri Bencf0706e82007-05-05 11:45:53 -0700622 int queue;
623
624 switch (aci) {
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200625 case 1: /* AC_BK */
Johannes Berge100bb62008-04-30 18:51:21 +0200626 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200627 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200628 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
Kalle Valoab133152010-01-12 10:42:31 +0200629 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
630 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700631 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200632 case 2: /* AC_VI */
Johannes Berge100bb62008-04-30 18:51:21 +0200633 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200634 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200635 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
Kalle Valoab133152010-01-12 10:42:31 +0200636 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
637 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700638 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200639 case 3: /* AC_VO */
Johannes Berge100bb62008-04-30 18:51:21 +0200640 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200641 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200642 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
Kalle Valoab133152010-01-12 10:42:31 +0200643 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
644 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700645 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200646 case 0: /* AC_BE */
Jiri Bencf0706e82007-05-05 11:45:53 -0700647 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200648 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200649 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200650 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
Kalle Valoab133152010-01-12 10:42:31 +0200651 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
652 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700653 break;
654 }
655
656 params.aifs = pos[0] & 0x0f;
657 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
658 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200659 params.txop = get_unaligned_le16(pos + 2);
Kalle Valoab133152010-01-12 10:42:31 +0200660 params.uapsd = uapsd;
661
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200662#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700663 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Kalle Valoab133152010-01-12 10:42:31 +0200664 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
Johannes Berg0bffe402009-06-09 16:18:32 +0200665 wiphy_name(local->hw.wiphy), queue, aci, acm,
Kalle Valoab133152010-01-12 10:42:31 +0200666 params.aifs, params.cw_min, params.cw_max, params.txop,
667 params.uapsd);
Johannes Berg3330d7b2008-02-10 16:49:38 +0100668#endif
Johannes Berg24487982009-04-23 18:52:52 +0200669 if (drv_conf_tx(local, queue, &params) && local->ops->conf_tx)
Jiri Bencf0706e82007-05-05 11:45:53 -0700670 printk(KERN_DEBUG "%s: failed to set TX queue "
Johannes Berg0bffe402009-06-09 16:18:32 +0200671 "parameters for queue %d\n",
672 wiphy_name(local->hw.wiphy), queue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700673 }
674}
675
Johannes Berg7a5158e2008-10-08 10:59:33 +0200676static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
677 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +0200678{
Johannes Bergbda39332008-10-11 01:51:51 +0200679 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100680 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200681 bool use_protection;
682 bool use_short_preamble;
683 bool use_short_slot;
684
685 if (erp_valid) {
686 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
687 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
688 } else {
689 use_protection = false;
690 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
691 }
692
693 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Felix Fietkau43d35342010-01-15 03:00:48 +0100694 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
695 use_short_slot = true;
Daniel Drake56282212007-07-10 19:32:10 +0200696
Johannes Berg471b3ef2007-12-28 14:32:58 +0100697 if (use_protection != bss_conf->use_cts_prot) {
Johannes Berg471b3ef2007-12-28 14:32:58 +0100698 bss_conf->use_cts_prot = use_protection;
699 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200700 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200701
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200702 if (use_short_preamble != bss_conf->use_short_preamble) {
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200703 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100704 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200705 }
Daniel Draked9430a32007-07-27 15:43:24 +0200706
Johannes Berg7a5158e2008-10-08 10:59:33 +0200707 if (use_short_slot != bss_conf->use_short_slot) {
Johannes Berg7a5158e2008-10-08 10:59:33 +0200708 bss_conf->use_short_slot = use_short_slot;
709 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -0400710 }
711
712 return changed;
713}
714
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200715static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100716 struct cfg80211_bss *cbss,
Johannes Bergae5eb022008-10-14 16:58:37 +0200717 u32 bss_info_changed)
Jiri Bencf0706e82007-05-05 11:45:53 -0700718{
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100719 struct ieee80211_bss *bss = (void *)cbss->priv;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100720 struct ieee80211_local *local = sdata->local;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400721
Johannes Bergae5eb022008-10-14 16:58:37 +0200722 bss_info_changed |= BSS_CHANGED_ASSOC;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200723 /* set timing information */
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100724 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
725 sdata->vif.bss_conf.timestamp = cbss->tsf;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400726
Johannes Berg77fdaa12009-07-07 03:45:17 +0200727 bss_info_changed |= BSS_CHANGED_BEACON_INT;
728 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100729 cbss->capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700730
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100731 sdata->u.mgd.associated = cbss;
732 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
Johannes Berg471b3ef2007-12-28 14:32:58 +0100733
Johannes Bergb291ba12009-07-10 15:29:03 +0200734 /* just to be sure */
735 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
736 IEEE80211_STA_BEACON_POLL);
737
Johannes Berg01838262009-12-17 16:16:53 +0100738 /*
739 * Always handle WMM once after association regardless
740 * of the first value the AP uses. Setting -1 here has
741 * that effect because the AP values is an unsigned
742 * 4-bit value.
743 */
744 sdata->u.mgd.wmm_last_param_set = -1;
745
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200746 ieee80211_led_assoc(local, 1);
747
Johannes Bergbda39332008-10-11 01:51:51 +0200748 sdata->vif.bss_conf.assoc = 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200749 /*
750 * For now just always ask the driver to update the basic rateset
751 * when we have associated, we aren't checking whether it actually
752 * changed or not.
753 */
Johannes Bergae5eb022008-10-14 16:58:37 +0200754 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
Johannes Berg9cef8732009-05-14 13:10:14 +0200755
756 /* And the BSSID changed - we're associated now */
757 bss_info_changed |= BSS_CHANGED_BSSID;
758
Johannes Bergae5eb022008-10-14 16:58:37 +0200759 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300760
Johannes Berg056508d2009-07-30 21:43:55 +0200761 mutex_lock(&local->iflist_mtx);
762 ieee80211_recalc_ps(local, -1);
Johannes Berg0f782312009-12-01 13:37:02 +0100763 ieee80211_recalc_smps(local, sdata);
Johannes Berg056508d2009-07-30 21:43:55 +0200764 mutex_unlock(&local->iflist_mtx);
Kalle Valoe0cb6862008-12-18 23:35:13 +0200765
John W. Linville8a5b33f2010-01-06 15:39:39 -0500766 netif_tx_start_all_queues(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200767 netif_carrier_on(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700768}
769
Johannes Berg63f170e2009-12-23 13:15:33 +0100770static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata)
Tomas Winkleraa458d12008-09-09 00:32:12 +0300771{
Johannes Berg46900292009-02-15 12:44:28 +0100772 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Tomas Winkleraa458d12008-09-09 00:32:12 +0300773 struct ieee80211_local *local = sdata->local;
774 struct sta_info *sta;
Kalle Valoe0cb6862008-12-18 23:35:13 +0200775 u32 changed = 0, config_changed = 0;
Johannes Bergb291ba12009-07-10 15:29:03 +0200776 u8 bssid[ETH_ALEN];
Tomas Winkleraa458d12008-09-09 00:32:12 +0300777
Johannes Berg77fdaa12009-07-07 03:45:17 +0200778 ASSERT_MGD_MTX(ifmgd);
779
Johannes Bergb291ba12009-07-10 15:29:03 +0200780 if (WARN_ON(!ifmgd->associated))
781 return;
782
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100783 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
Johannes Bergb291ba12009-07-10 15:29:03 +0200784
Johannes Berg77fdaa12009-07-07 03:45:17 +0200785 ifmgd->associated = NULL;
786 memset(ifmgd->bssid, 0, ETH_ALEN);
787
788 /*
789 * we need to commit the associated = NULL change because the
790 * scan code uses that to determine whether this iface should
791 * go to/wake up from powersave or not -- and could otherwise
792 * wake the queues erroneously.
793 */
794 smp_mb();
795
796 /*
797 * Thus, we can only afterwards stop the queues -- to account
798 * for the case where another CPU is finishing a scan at this
799 * time -- we don't want the scan code to enable queues.
800 */
Tomas Winkleraa458d12008-09-09 00:32:12 +0300801
John W. Linville8a5b33f2010-01-06 15:39:39 -0500802 netif_tx_stop_all_queues(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300803 netif_carrier_off(sdata->dev);
804
Johannes Berg1fa6f4a2009-06-15 18:13:58 +0200805 rcu_read_lock();
Johannes Bergabe60632009-11-25 17:46:18 +0100806 sta = sta_info_get(sdata, bssid);
Sujith4cad6c72010-02-10 14:52:21 +0530807 if (sta) {
808 set_sta_flags(sta, WLAN_STA_DISASSOC);
Johannes Berg1fa6f4a2009-06-15 18:13:58 +0200809 ieee80211_sta_tear_down_BA_sessions(sta);
Sujith4cad6c72010-02-10 14:52:21 +0530810 }
Johannes Berg1fa6f4a2009-06-15 18:13:58 +0200811 rcu_read_unlock();
Tomas Winkleraa458d12008-09-09 00:32:12 +0300812
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200813 changed |= ieee80211_reset_erp_info(sdata);
814
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200815 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +0200816 changed |= BSS_CHANGED_ASSOC;
817 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200818
Johannes Bergaa837e12009-05-07 16:16:24 +0200819 ieee80211_set_wmm_default(sdata);
820
Johannes Berg47979382009-01-07 10:13:27 +0100821 /* channel(_type) changes are handled by ieee80211_hw_config */
Sujith094d05d2008-12-12 11:57:43 +0530822 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +0200823
Johannes Berg413ad502009-05-08 21:21:06 +0200824 /* on the next assoc, re-program HT parameters */
825 sdata->ht_opmode_valid = false;
826
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +0530827 local->power_constr_level = 0;
828
Kalle Valo520eb822008-12-18 23:35:27 +0200829 del_timer_sync(&local->dynamic_ps_timer);
830 cancel_work_sync(&local->dynamic_ps_enable_work);
831
Kalle Valoe0cb6862008-12-18 23:35:13 +0200832 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
833 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
834 config_changed |= IEEE80211_CONF_CHANGE_PS;
835 }
836
837 ieee80211_hw_config(local, config_changed);
Johannes Berg9cef8732009-05-14 13:10:14 +0200838
839 /* And the BSSID changed -- not very interesting here */
840 changed |= BSS_CHANGED_BSSID;
Johannes Bergae5eb022008-10-14 16:58:37 +0200841 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +0200842
Johannes Berg34e89502010-02-03 13:59:58 +0100843 sta_info_destroy_addr(sdata, bssid);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300844}
Jiri Bencf0706e82007-05-05 11:45:53 -0700845
Kalle Valo3cf335d2009-03-22 21:57:06 +0200846void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
847 struct ieee80211_hdr *hdr)
848{
849 /*
850 * We can postpone the mgd.timer whenever receiving unicast frames
851 * from AP because we know that the connection is working both ways
852 * at that time. But multicast frames (and hence also beacons) must
853 * be ignored here, because we need to trigger the timer during
Johannes Bergb291ba12009-07-10 15:29:03 +0200854 * data idle periods for sending the periodic probe request to the
855 * AP we're connected to.
Kalle Valo3cf335d2009-03-22 21:57:06 +0200856 */
Johannes Bergb291ba12009-07-10 15:29:03 +0200857 if (is_multicast_ether_addr(hdr->addr1))
858 return;
859
860 mod_timer(&sdata->u.mgd.conn_mon_timer,
861 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
Kalle Valo3cf335d2009-03-22 21:57:06 +0200862}
Jiri Bencf0706e82007-05-05 11:45:53 -0700863
Maxim Levitskya43abf22009-07-31 18:54:12 +0300864static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
865{
866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
867 const u8 *ssid;
868
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100869 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
870 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
Maxim Levitskya43abf22009-07-31 18:54:12 +0300871 ssid + 2, ssid[1], NULL, 0);
872
873 ifmgd->probe_send_count++;
874 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
875 run_again(ifmgd, ifmgd->probe_timeout);
876}
877
Johannes Bergb291ba12009-07-10 15:29:03 +0200878static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
879 bool beacon)
Kalle Valo04de8382009-03-22 21:57:35 +0200880{
Kalle Valo04de8382009-03-22 21:57:35 +0200881 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +0200882 bool already = false;
Johannes Berg34bfc412009-05-12 19:58:12 +0200883
Johannes Berg9607e6b2009-12-23 13:15:31 +0100884 if (!ieee80211_sdata_running(sdata))
Johannes Berg0e2b6282009-07-13 13:23:39 +0200885 return;
886
Luis R. Rodriguez91a3bd72009-07-23 16:37:47 -0700887 if (sdata->local->scanning)
888 return;
889
Johannes Bergb8bc4b02009-12-23 13:15:42 +0100890 if (sdata->local->tmp_channel)
891 return;
892
Johannes Berg77fdaa12009-07-07 03:45:17 +0200893 mutex_lock(&ifmgd->mtx);
894
895 if (!ifmgd->associated)
896 goto out;
897
Michael Buescha8604022009-04-15 14:41:22 -0400898#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergb291ba12009-07-10 15:29:03 +0200899 if (beacon && net_ratelimit())
900 printk(KERN_DEBUG "%s: detected beacon loss from AP "
Johannes Berg47846c92009-11-25 17:46:19 +0100901 "- sending probe request\n", sdata->name);
Michael Buescha8604022009-04-15 14:41:22 -0400902#endif
Kalle Valo04de8382009-03-22 21:57:35 +0200903
Johannes Bergb291ba12009-07-10 15:29:03 +0200904 /*
905 * The driver/our work has already reported this event or the
906 * connection monitoring has kicked in and we have already sent
907 * a probe request. Or maybe the AP died and the driver keeps
908 * reporting until we disassociate...
909 *
910 * In either case we have to ignore the current call to this
911 * function (except for setting the correct probe reason bit)
912 * because otherwise we would reset the timer every time and
913 * never check whether we received a probe response!
914 */
915 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
916 IEEE80211_STA_CONNECTION_POLL))
917 already = true;
918
919 if (beacon)
920 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
921 else
922 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
923
924 if (already)
925 goto out;
926
Johannes Berg4e751842009-06-10 15:16:52 +0200927 mutex_lock(&sdata->local->iflist_mtx);
928 ieee80211_recalc_ps(sdata->local, -1);
929 mutex_unlock(&sdata->local->iflist_mtx);
930
Maxim Levitskya43abf22009-07-31 18:54:12 +0300931 ifmgd->probe_send_count = 0;
932 ieee80211_mgd_probe_ap_send(sdata);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200933 out:
934 mutex_unlock(&ifmgd->mtx);
Kalle Valo04de8382009-03-22 21:57:35 +0200935}
936
Johannes Bergb291ba12009-07-10 15:29:03 +0200937void ieee80211_beacon_loss_work(struct work_struct *work)
938{
939 struct ieee80211_sub_if_data *sdata =
940 container_of(work, struct ieee80211_sub_if_data,
941 u.mgd.beacon_loss_work);
942
943 ieee80211_mgd_probe_ap(sdata, true);
944}
945
Kalle Valo04de8382009-03-22 21:57:35 +0200946void ieee80211_beacon_loss(struct ieee80211_vif *vif)
947{
948 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
949
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400950 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
Kalle Valo04de8382009-03-22 21:57:35 +0200951}
952EXPORT_SYMBOL(ieee80211_beacon_loss);
953
Johannes Berg77fdaa12009-07-07 03:45:17 +0200954static enum rx_mgmt_action __must_check
955ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +0200956 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -0700957{
Johannes Berg46900292009-02-15 12:44:28 +0100958 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200959 const u8 *bssid = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -0700960 u16 reason_code;
961
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200962 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +0200963 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -0700964
Johannes Berg77fdaa12009-07-07 03:45:17 +0200965 ASSERT_MGD_MTX(ifmgd);
966
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100967 bssid = ifmgd->associated->bssid;
Jiri Bencf0706e82007-05-05 11:45:53 -0700968
969 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
970
Johannes Berg77fdaa12009-07-07 03:45:17 +0200971 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
Johannes Berg47846c92009-11-25 17:46:19 +0100972 sdata->name, bssid, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -0700973
Johannes Berg63f170e2009-12-23 13:15:33 +0100974 ieee80211_set_disassoc(sdata);
975 ieee80211_recalc_idle(sdata->local);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200976
977 return RX_MGMT_CFG80211_DEAUTH;
Jiri Bencf0706e82007-05-05 11:45:53 -0700978}
979
980
Johannes Berg77fdaa12009-07-07 03:45:17 +0200981static enum rx_mgmt_action __must_check
982ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
983 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -0700984{
Johannes Berg46900292009-02-15 12:44:28 +0100985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -0700986 u16 reason_code;
987
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200988 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +0200989 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -0700990
Johannes Berg77fdaa12009-07-07 03:45:17 +0200991 ASSERT_MGD_MTX(ifmgd);
992
993 if (WARN_ON(!ifmgd->associated))
994 return RX_MGMT_NONE;
995
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100996 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
Johannes Berg77fdaa12009-07-07 03:45:17 +0200997 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -0700998
999 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1000
Johannes Berg0ff71612009-09-26 14:45:41 +02001001 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01001002 sdata->name, mgmt->sa, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001003
Johannes Berg63f170e2009-12-23 13:15:33 +01001004 ieee80211_set_disassoc(sdata);
Johannes Bergbc83b682009-11-29 12:19:06 +01001005 ieee80211_recalc_idle(sdata->local);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001006 return RX_MGMT_CFG80211_DISASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -07001007}
1008
1009
Johannes Bergaf6b6372009-12-23 13:15:35 +01001010static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1011 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001012{
Johannes Bergaf6b6372009-12-23 13:15:35 +01001013 struct ieee80211_sub_if_data *sdata = wk->sdata;
Johannes Berg46900292009-02-15 12:44:28 +01001014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001015 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001016 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07001017 struct sta_info *sta;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001018 struct cfg80211_bss *cbss = wk->assoc.bss;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001019 u8 *pos;
Johannes Berg881d9482009-01-21 15:13:48 +01001020 u32 rates, basic_rates;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001021 u16 capab_info, aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001022 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02001023 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Bergae5eb022008-10-14 16:58:37 +02001024 u32 changed = 0;
Johannes Berg5d1ec852009-12-02 12:43:43 +01001025 int i, j, err;
1026 bool have_higher_than_11mbit = false;
Johannes Bergae5eb022008-10-14 16:58:37 +02001027 u16 ap_ht_cap_flags;
Jiri Bencf0706e82007-05-05 11:45:53 -07001028
Johannes Bergaf6b6372009-12-23 13:15:35 +01001029 /* AssocResp and ReassocResp have identical structure */
Jiri Bencf0706e82007-05-05 11:45:53 -07001030
Jiri Bencf0706e82007-05-05 11:45:53 -07001031 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001032 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
Jiri Bencf0706e82007-05-05 11:45:53 -07001033
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001034 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1035 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Johannes Berg47846c92009-11-25 17:46:19 +01001036 "set\n", sdata->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001037 aid &= ~(BIT(15) | BIT(14));
1038
Johannes Bergaf6b6372009-12-23 13:15:35 +01001039 pos = mgmt->u.assoc_resp.variable;
1040 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1041
Jiri Bencf0706e82007-05-05 11:45:53 -07001042 if (!elems.supp_rates) {
1043 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Johannes Berg47846c92009-11-25 17:46:19 +01001044 sdata->name);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001045 return false;
Jiri Bencf0706e82007-05-05 11:45:53 -07001046 }
1047
Johannes Berg46900292009-02-15 12:44:28 +01001048 ifmgd->aid = aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001049
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001050 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001051 if (!sta) {
Johannes Berg5d1ec852009-12-02 12:43:43 +01001052 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1053 " the AP\n", sdata->name);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001054 return false;
Jiri Bencf0706e82007-05-05 11:45:53 -07001055 }
1056
Johannes Berg5d1ec852009-12-02 12:43:43 +01001057 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1058 WLAN_STA_ASSOC_AP);
1059 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1060 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1061
Jiri Bencf0706e82007-05-05 11:45:53 -07001062 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001063 basic_rates = 0;
1064 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1065
Jiri Bencf0706e82007-05-05 11:45:53 -07001066 for (i = 0; i < elems.supp_rates_len; i++) {
1067 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001068 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001069
1070 if (rate > 110)
1071 have_higher_than_11mbit = true;
1072
1073 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001074 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001075 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001076 if (is_basic)
1077 basic_rates |= BIT(j);
1078 break;
1079 }
Johannes Berg8318d782008-01-24 19:38:38 +01001080 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001081 }
Johannes Berg8318d782008-01-24 19:38:38 +01001082
Jiri Bencf0706e82007-05-05 11:45:53 -07001083 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1084 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Johannes Berg7e0986c2009-04-19 13:22:11 +02001085 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001086
1087 if (rate > 110)
1088 have_higher_than_11mbit = true;
1089
1090 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001091 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001092 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001093 if (is_basic)
1094 basic_rates |= BIT(j);
1095 break;
1096 }
Johannes Berg8318d782008-01-24 19:38:38 +01001097 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001098 }
Johannes Berg8318d782008-01-24 19:38:38 +01001099
Johannes Berg323ce792008-09-11 02:45:11 +02001100 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Johannes Bergbda39332008-10-11 01:51:51 +02001101 sdata->vif.bss_conf.basic_rates = basic_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01001102
1103 /* cf. IEEE 802.11 9.2.12 */
1104 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1105 have_higher_than_11mbit)
1106 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1107 else
1108 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001109
Johannes Bergab1faea2009-07-01 21:41:17 +02001110 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001111 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02001112 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02001113
1114 ap_ht_cap_flags = sta->sta.ht_cap.cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001115
Johannes Berg4b7679a2008-09-18 18:14:18 +02001116 rate_control_rate_init(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001117
Johannes Berg46900292009-02-15 12:44:28 +01001118 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
Jouni Malinen5394af42009-01-08 13:31:59 +02001119 set_sta_flags(sta, WLAN_STA_MFP);
1120
Johannes Bergddf4ac52008-10-22 11:41:38 +02001121 if (elems.wmm_param)
Johannes Berg07346f812008-05-03 01:02:02 +02001122 set_sta_flags(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02001123
Johannes Berg5d1ec852009-12-02 12:43:43 +01001124 err = sta_info_insert(sta);
1125 sta = NULL;
1126 if (err) {
1127 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1128 " the AP (error %d)\n", sdata->name, err);
Johannes Berg90be5612010-01-08 19:01:07 +01001129 return false;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001130 }
1131
Johannes Bergddf4ac52008-10-22 11:41:38 +02001132 if (elems.wmm_param)
Johannes Berg46900292009-02-15 12:44:28 +01001133 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07001134 elems.wmm_param_len);
Johannes Bergaa837e12009-05-07 16:16:24 +02001135 else
1136 ieee80211_set_wmm_default(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001137
Johannes Berge4da8c32009-12-23 13:15:43 +01001138 local->oper_channel = wk->chan;
1139
Johannes Bergae5eb022008-10-14 16:58:37 +02001140 if (elems.ht_info_elem && elems.wmm_param &&
Johannes Bergaf6b6372009-12-23 13:15:35 +01001141 (sdata->local->hw.queues >= 4) &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001142 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001143 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001144 cbss->bssid, ap_ht_cap_flags);
Johannes Bergae5eb022008-10-14 16:58:37 +02001145
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001146 /* set AID and assoc capability,
1147 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01001148 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001149 bss_conf->assoc_capability = capab_info;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001150 ieee80211_set_associated(sdata, cbss, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001151
Kalle Valo15b7b062009-03-22 21:57:14 +02001152 /*
Felix Fietkaud5242152010-01-08 18:06:26 +01001153 * If we're using 4-addr mode, let the AP know that we're
1154 * doing so, so that it can create the STA VLAN on its side
1155 */
1156 if (ifmgd->use_4addr)
1157 ieee80211_send_4addr_nullfunc(local, sdata);
1158
1159 /*
Johannes Bergb291ba12009-07-10 15:29:03 +02001160 * Start timer to probe the connection to the AP now.
1161 * Also start the timer that will detect beacon loss.
Kalle Valo15b7b062009-03-22 21:57:14 +02001162 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001163 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1164 mod_beacon_timer(sdata);
Kalle Valo15b7b062009-03-22 21:57:14 +02001165
Johannes Bergaf6b6372009-12-23 13:15:35 +01001166 return true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001167}
1168
1169
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001170static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001171 struct ieee80211_mgmt *mgmt,
1172 size_t len,
1173 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001174 struct ieee802_11_elems *elems,
1175 bool beacon)
Jiri Bencf0706e82007-05-05 11:45:53 -07001176{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001177 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001178 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02001179 struct ieee80211_bss *bss;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01001180 struct ieee80211_channel *channel;
Johannes Berg56007a02010-01-26 14:19:52 +01001181 bool need_ps = false;
1182
1183 if (sdata->u.mgd.associated) {
1184 bss = (void *)sdata->u.mgd.associated->priv;
1185 /* not previously set so we may need to recalc */
1186 need_ps = !bss->dtim_period;
1187 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001188
Johannes Berg5bda6172008-09-08 11:05:10 +02001189 if (elems->ds_params && elems->ds_params_len == 1)
1190 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1191 else
1192 freq = rx_status->freq;
1193
1194 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1195
1196 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1197 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001198
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001199 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
Johannes Berg2a519312009-02-10 21:25:55 +01001200 channel, beacon);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001201 if (bss)
1202 ieee80211_rx_bss_put(local, bss);
1203
1204 if (!sdata->u.mgd.associated)
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001205 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001206
Johannes Berg56007a02010-01-26 14:19:52 +01001207 if (need_ps) {
1208 mutex_lock(&local->iflist_mtx);
1209 ieee80211_recalc_ps(local, -1);
1210 mutex_unlock(&local->iflist_mtx);
1211 }
1212
Sujithc481ec92009-01-06 09:28:37 +05301213 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001214 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001215 ETH_ALEN) == 0)) {
Sujithc481ec92009-01-06 09:28:37 +05301216 struct ieee80211_channel_sw_ie *sw_elem =
1217 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
Johannes Bergcc32abd2009-05-15 11:52:31 +02001218 ieee80211_sta_process_chanswitch(sdata, sw_elem, bss);
Sujithc481ec92009-01-06 09:28:37 +05301219 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001220}
1221
1222
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001223static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Johannes Bergaf6b6372009-12-23 13:15:35 +01001224 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001225{
Johannes Bergaf6b6372009-12-23 13:15:35 +01001226 struct ieee80211_mgmt *mgmt = (void *)skb->data;
Kalle Valo15b7b062009-03-22 21:57:14 +02001227 struct ieee80211_if_managed *ifmgd;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001228 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1229 size_t baselen, len = skb->len;
Ester Kummerae6a44e2008-06-27 18:54:48 +03001230 struct ieee802_11_elems elems;
1231
Kalle Valo15b7b062009-03-22 21:57:14 +02001232 ifmgd = &sdata->u.mgd;
1233
Johannes Berg77fdaa12009-07-07 03:45:17 +02001234 ASSERT_MGD_MTX(ifmgd);
1235
Johannes Berg47846c92009-11-25 17:46:19 +01001236 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03001237 return; /* ignore ProbeResp to foreign address */
1238
Ester Kummerae6a44e2008-06-27 18:54:48 +03001239 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1240 if (baselen > len)
1241 return;
1242
1243 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1244 &elems);
1245
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001246 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001247
Johannes Berg77fdaa12009-07-07 03:45:17 +02001248 if (ifmgd->associated &&
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001249 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
Johannes Bergb291ba12009-07-10 15:29:03 +02001250 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1251 IEEE80211_STA_CONNECTION_POLL)) {
1252 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1253 IEEE80211_STA_BEACON_POLL);
Johannes Berg4e751842009-06-10 15:16:52 +02001254 mutex_lock(&sdata->local->iflist_mtx);
1255 ieee80211_recalc_ps(sdata->local, -1);
1256 mutex_unlock(&sdata->local->iflist_mtx);
Johannes Bergb291ba12009-07-10 15:29:03 +02001257 /*
1258 * We've received a probe response, but are not sure whether
1259 * we have or will be receiving any beacons or data, so let's
1260 * schedule the timers again, just in case.
1261 */
1262 mod_beacon_timer(sdata);
1263 mod_timer(&ifmgd->conn_mon_timer,
1264 round_jiffies_up(jiffies +
1265 IEEE80211_CONNECTION_IDLE_TIME));
Johannes Berg4e751842009-06-10 15:16:52 +02001266 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001267}
1268
Johannes Bergd91f36d2009-04-16 13:17:26 +02001269/*
1270 * This is the canonical list of information elements we care about,
1271 * the filter code also gives us all changes to the Microsoft OUI
1272 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1273 *
1274 * We implement beacon filtering in software since that means we can
1275 * avoid processing the frame here and in cfg80211, and userspace
1276 * will not be able to tell whether the hardware supports it or not.
1277 *
1278 * XXX: This list needs to be dynamic -- userspace needs to be able to
1279 * add items it requires. It also needs to be able to tell us to
1280 * look out for other vendor IEs.
1281 */
1282static const u64 care_about_ies =
Johannes Berg1d4df3a2009-04-22 11:25:43 +02001283 (1ULL << WLAN_EID_COUNTRY) |
1284 (1ULL << WLAN_EID_ERP_INFO) |
1285 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1286 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1287 (1ULL << WLAN_EID_HT_CAPABILITY) |
1288 (1ULL << WLAN_EID_HT_INFORMATION);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001289
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001290static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001291 struct ieee80211_mgmt *mgmt,
1292 size_t len,
1293 struct ieee80211_rx_status *rx_status)
1294{
Johannes Bergd91f36d2009-04-16 13:17:26 +02001295 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001296 size_t baselen;
1297 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001298 struct ieee80211_local *local = sdata->local;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001299 u32 changed = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001300 bool erp_valid, directed_tim = false;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001301 u8 erp_value = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001302 u32 ncrc;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001303 u8 *bssid;
1304
1305 ASSERT_MGD_MTX(ifmgd);
Jiri Bencf0706e82007-05-05 11:45:53 -07001306
Ester Kummerae6a44e2008-06-27 18:54:48 +03001307 /* Process beacon from the current BSS */
1308 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1309 if (baselen > len)
1310 return;
1311
Johannes Bergd91f36d2009-04-16 13:17:26 +02001312 if (rx_status->freq != local->hw.conf.channel->center_freq)
Jiri Bencf0706e82007-05-05 11:45:53 -07001313 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001314
Johannes Bergb291ba12009-07-10 15:29:03 +02001315 /*
1316 * We might have received a number of frames, among them a
1317 * disassoc frame and a beacon...
1318 */
1319 if (!ifmgd->associated)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001320 return;
1321
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001322 bssid = ifmgd->associated->bssid;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001323
Johannes Bergb291ba12009-07-10 15:29:03 +02001324 /*
1325 * And in theory even frames from a different AP we were just
1326 * associated to a split-second ago!
1327 */
1328 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001329 return;
1330
Johannes Bergb291ba12009-07-10 15:29:03 +02001331 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
Jouni Malinen92778182009-05-14 21:15:36 +03001332#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1333 if (net_ratelimit()) {
1334 printk(KERN_DEBUG "%s: cancelling probereq poll due "
Johannes Berg47846c92009-11-25 17:46:19 +01001335 "to a received beacon\n", sdata->name);
Jouni Malinen92778182009-05-14 21:15:36 +03001336 }
1337#endif
Johannes Bergb291ba12009-07-10 15:29:03 +02001338 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
Johannes Berg4e751842009-06-10 15:16:52 +02001339 mutex_lock(&local->iflist_mtx);
1340 ieee80211_recalc_ps(local, -1);
1341 mutex_unlock(&local->iflist_mtx);
Jouni Malinen92778182009-05-14 21:15:36 +03001342 }
1343
Johannes Bergb291ba12009-07-10 15:29:03 +02001344 /*
1345 * Push the beacon loss detection into the future since
1346 * we are processing a beacon from the AP just now.
1347 */
1348 mod_beacon_timer(sdata);
1349
Johannes Bergd91f36d2009-04-16 13:17:26 +02001350 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1351 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1352 len - baselen, &elems,
1353 care_about_ies, ncrc);
1354
1355 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
Johannes Berge7ec86f2009-04-18 17:33:24 +02001356 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1357 ifmgd->aid);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001358
Jouni Malinen30196672009-05-19 17:01:43 +03001359 if (ncrc != ifmgd->beacon_crc) {
1360 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1361 true);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001362
Jouni Malinen30196672009-05-19 17:01:43 +03001363 ieee80211_sta_wmm_params(local, ifmgd, elems.wmm_param,
1364 elems.wmm_param_len);
1365 }
Johannes Bergfe3fa822008-09-08 11:05:09 +02001366
Vivek Natarajan25c9c872009-03-02 20:20:30 +05301367 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
Kalle Valo1fb36062009-02-10 17:09:24 +02001368 if (directed_tim) {
Kalle Valo572e0012009-02-10 17:09:31 +02001369 if (local->hw.conf.dynamic_ps_timeout > 0) {
1370 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1371 ieee80211_hw_config(local,
1372 IEEE80211_CONF_CHANGE_PS);
1373 ieee80211_send_nullfunc(local, sdata, 0);
1374 } else {
1375 local->pspolling = true;
1376
1377 /*
1378 * Here is assumed that the driver will be
1379 * able to send ps-poll frame and receive a
1380 * response even though power save mode is
1381 * enabled, but some drivers might require
1382 * to disable power save here. This needs
1383 * to be investigated.
1384 */
1385 ieee80211_send_pspoll(local, sdata);
1386 }
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001387 }
1388 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001389
Jouni Malinen30196672009-05-19 17:01:43 +03001390 if (ncrc == ifmgd->beacon_crc)
1391 return;
1392 ifmgd->beacon_crc = ncrc;
1393
Johannes Berg7a5158e2008-10-08 10:59:33 +02001394 if (elems.erp_info && elems.erp_info_len >= 1) {
1395 erp_valid = true;
1396 erp_value = elems.erp_info[0];
1397 } else {
1398 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04001399 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001400 changed |= ieee80211_handle_bss_capability(sdata,
1401 le16_to_cpu(mgmt->u.beacon.capab_info),
1402 erp_valid, erp_value);
Jiri Bencf0706e82007-05-05 11:45:53 -07001403
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001404
Vasanthakumar Thiagarajan53d6f81c2009-02-11 22:18:49 +05301405 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001406 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001407 struct sta_info *sta;
1408 struct ieee80211_supported_band *sband;
1409 u16 ap_ht_cap_flags;
1410
1411 rcu_read_lock();
1412
Johannes Bergabe60632009-11-25 17:46:18 +01001413 sta = sta_info_get(sdata, bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001414 if (WARN_ON(!sta)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001415 rcu_read_unlock();
1416 return;
1417 }
1418
1419 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1420
1421 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1422 elems.ht_cap_elem, &sta->sta.ht_cap);
1423
1424 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1425
1426 rcu_read_unlock();
1427
1428 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001429 bssid, ap_ht_cap_flags);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001430 }
1431
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07001432 /* Note: country IE parsing is done for us by cfg80211 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001433 if (elems.country_elem) {
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301434 /* TODO: IBSS also needs this */
1435 if (elems.pwr_constr_elem)
1436 ieee80211_handle_pwr_constr(sdata,
1437 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1438 elems.pwr_constr_elem,
1439 elems.pwr_constr_elem_len);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001440 }
1441
Johannes Berg471b3ef2007-12-28 14:32:58 +01001442 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001443}
1444
Johannes Berg46900292009-02-15 12:44:28 +01001445ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
Johannes Bergf1d58c22009-06-17 13:13:00 +02001446 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001447{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001448 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001449 struct ieee80211_mgmt *mgmt;
1450 u16 fc;
1451
1452 if (skb->len < 24)
Johannes Berg46900292009-02-15 12:44:28 +01001453 return RX_DROP_MONITOR;
Jiri Bencf0706e82007-05-05 11:45:53 -07001454
1455 mgmt = (struct ieee80211_mgmt *) skb->data;
1456 fc = le16_to_cpu(mgmt->frame_control);
1457
1458 switch (fc & IEEE80211_FCTL_STYPE) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001459 case IEEE80211_STYPE_PROBE_RESP:
1460 case IEEE80211_STYPE_BEACON:
Jiri Bencf0706e82007-05-05 11:45:53 -07001461 case IEEE80211_STYPE_DEAUTH:
1462 case IEEE80211_STYPE_DISASSOC:
Johannes Berg77fdaa12009-07-07 03:45:17 +02001463 case IEEE80211_STYPE_ACTION:
Johannes Berg46900292009-02-15 12:44:28 +01001464 skb_queue_tail(&sdata->u.mgd.skb_queue, skb);
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001465 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
Johannes Berg46900292009-02-15 12:44:28 +01001466 return RX_QUEUED;
Jiri Bencf0706e82007-05-05 11:45:53 -07001467 }
1468
Johannes Berg46900292009-02-15 12:44:28 +01001469 return RX_DROP_MONITOR;
Jiri Bencf0706e82007-05-05 11:45:53 -07001470}
1471
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001472static void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001473 struct sk_buff *skb)
1474{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001475 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001476 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07001477 struct ieee80211_mgmt *mgmt;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001478 enum rx_mgmt_action rma = RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001479 u16 fc;
1480
Jiri Bencf0706e82007-05-05 11:45:53 -07001481 rx_status = (struct ieee80211_rx_status *) skb->cb;
1482 mgmt = (struct ieee80211_mgmt *) skb->data;
1483 fc = le16_to_cpu(mgmt->frame_control);
1484
Johannes Berg77fdaa12009-07-07 03:45:17 +02001485 mutex_lock(&ifmgd->mtx);
1486
1487 if (ifmgd->associated &&
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001488 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02001489 switch (fc & IEEE80211_FCTL_STYPE) {
1490 case IEEE80211_STYPE_BEACON:
1491 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1492 rx_status);
1493 break;
1494 case IEEE80211_STYPE_PROBE_RESP:
Johannes Bergaf6b6372009-12-23 13:15:35 +01001495 ieee80211_rx_mgmt_probe_resp(sdata, skb);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001496 break;
1497 case IEEE80211_STYPE_DEAUTH:
Johannes Berg63f170e2009-12-23 13:15:33 +01001498 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001499 break;
1500 case IEEE80211_STYPE_DISASSOC:
1501 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1502 break;
1503 case IEEE80211_STYPE_ACTION:
Felix Fietkaud7907442010-01-07 20:23:53 +01001504 if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
1505 break;
1506
Johannes Berg77fdaa12009-07-07 03:45:17 +02001507 ieee80211_sta_process_chanswitch(sdata,
1508 &mgmt->u.action.u.chan_switch.sw_elem,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001509 (void *)ifmgd->associated->priv);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001510 break;
1511 }
1512 mutex_unlock(&ifmgd->mtx);
1513
1514 switch (rma) {
1515 case RX_MGMT_NONE:
1516 /* no action */
1517 break;
1518 case RX_MGMT_CFG80211_DEAUTH:
Holger Schurigce470612009-10-13 13:28:13 +02001519 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001520 break;
1521 case RX_MGMT_CFG80211_DISASSOC:
Holger Schurigce470612009-10-13 13:28:13 +02001522 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001523 break;
1524 default:
1525 WARN(1, "unexpected: %d", rma);
1526 }
1527 goto out;
1528 }
1529
Johannes Berg77fdaa12009-07-07 03:45:17 +02001530 mutex_unlock(&ifmgd->mtx);
1531
Johannes Berg63f170e2009-12-23 13:15:33 +01001532 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
Johannes Bergaf6b6372009-12-23 13:15:35 +01001533 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH)
Holger Schurigce470612009-10-13 13:28:13 +02001534 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001535
1536 out:
Jiri Bencf0706e82007-05-05 11:45:53 -07001537 kfree_skb(skb);
1538}
1539
Johannes Berg9c6bd792008-09-11 00:01:52 +02001540static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e82007-05-05 11:45:53 -07001541{
1542 struct ieee80211_sub_if_data *sdata =
1543 (struct ieee80211_sub_if_data *) data;
Johannes Berg46900292009-02-15 12:44:28 +01001544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001545 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001546
Johannes Berg5bb644a2009-05-17 11:40:42 +02001547 if (local->quiescing) {
1548 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1549 return;
1550 }
1551
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001552 ieee80211_queue_work(&local->hw, &ifmgd->work);
Jiri Bencf0706e82007-05-05 11:45:53 -07001553}
1554
Johannes Berg9c6bd792008-09-11 00:01:52 +02001555static void ieee80211_sta_work(struct work_struct *work)
Johannes Berg60f8b392008-09-08 17:44:22 +02001556{
1557 struct ieee80211_sub_if_data *sdata =
Johannes Berg46900292009-02-15 12:44:28 +01001558 container_of(work, struct ieee80211_sub_if_data, u.mgd.work);
Johannes Berg60f8b392008-09-08 17:44:22 +02001559 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001560 struct ieee80211_if_managed *ifmgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02001561 struct sk_buff *skb;
1562
Johannes Berg9607e6b2009-12-23 13:15:31 +01001563 if (!ieee80211_sdata_running(sdata))
Johannes Berg60f8b392008-09-08 17:44:22 +02001564 return;
1565
Helmut Schaafbe9c422009-07-23 12:14:04 +02001566 if (local->scanning)
Johannes Berg60f8b392008-09-08 17:44:22 +02001567 return;
1568
Johannes Berg46900292009-02-15 12:44:28 +01001569 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
Johannes Berg60f8b392008-09-08 17:44:22 +02001570 return;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001571
1572 /*
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001573 * ieee80211_queue_work() should have picked up most cases,
1574 * here we'll pick the the rest.
Johannes Berg5bb644a2009-05-17 11:40:42 +02001575 */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001576 if (WARN(local->suspended, "STA MLME work scheduled while "
1577 "going to suspend\n"))
Johannes Berg5bb644a2009-05-17 11:40:42 +02001578 return;
1579
Johannes Berg46900292009-02-15 12:44:28 +01001580 ifmgd = &sdata->u.mgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02001581
Johannes Berg77fdaa12009-07-07 03:45:17 +02001582 /* first process frames to avoid timing out while a frame is pending */
Johannes Berg46900292009-02-15 12:44:28 +01001583 while ((skb = skb_dequeue(&ifmgd->skb_queue)))
Johannes Berg60f8b392008-09-08 17:44:22 +02001584 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1585
Johannes Berg77fdaa12009-07-07 03:45:17 +02001586 /* then process the rest of the work */
1587 mutex_lock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02001588
Johannes Bergb291ba12009-07-10 15:29:03 +02001589 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1590 IEEE80211_STA_CONNECTION_POLL) &&
1591 ifmgd->associated) {
Maxim Levitskya43abf22009-07-31 18:54:12 +03001592 u8 bssid[ETH_ALEN];
1593
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001594 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
Johannes Bergb291ba12009-07-10 15:29:03 +02001595 if (time_is_after_jiffies(ifmgd->probe_timeout))
1596 run_again(ifmgd, ifmgd->probe_timeout);
Maxim Levitskya43abf22009-07-31 18:54:12 +03001597
1598 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1599#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1600 printk(KERN_DEBUG "No probe response from AP %pM"
1601 " after %dms, try %d\n", bssid,
1602 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1603 ifmgd->probe_send_count);
1604#endif
1605 ieee80211_mgd_probe_ap_send(sdata);
1606 } else {
Johannes Bergb291ba12009-07-10 15:29:03 +02001607 /*
1608 * We actually lost the connection ... or did we?
1609 * Let's make sure!
1610 */
1611 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1612 IEEE80211_STA_BEACON_POLL);
Johannes Bergb291ba12009-07-10 15:29:03 +02001613 printk(KERN_DEBUG "No probe response from AP %pM"
1614 " after %dms, disconnecting.\n",
1615 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
Johannes Berg63f170e2009-12-23 13:15:33 +01001616 ieee80211_set_disassoc(sdata);
Johannes Bergbc83b682009-11-29 12:19:06 +01001617 ieee80211_recalc_idle(local);
Johannes Bergb291ba12009-07-10 15:29:03 +02001618 mutex_unlock(&ifmgd->mtx);
1619 /*
1620 * must be outside lock due to cfg80211,
1621 * but that's not a problem.
1622 */
1623 ieee80211_send_deauth_disassoc(sdata, bssid,
1624 IEEE80211_STYPE_DEAUTH,
1625 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
1626 NULL);
1627 mutex_lock(&ifmgd->mtx);
1628 }
1629 }
1630
Johannes Berg77fdaa12009-07-07 03:45:17 +02001631 mutex_unlock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02001632}
Johannes Berg0a51b272008-09-08 17:44:25 +02001633
Johannes Bergb291ba12009-07-10 15:29:03 +02001634static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1635{
1636 struct ieee80211_sub_if_data *sdata =
1637 (struct ieee80211_sub_if_data *) data;
1638 struct ieee80211_local *local = sdata->local;
1639
1640 if (local->quiescing)
1641 return;
1642
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001643 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_loss_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02001644}
1645
1646static void ieee80211_sta_conn_mon_timer(unsigned long data)
1647{
1648 struct ieee80211_sub_if_data *sdata =
1649 (struct ieee80211_sub_if_data *) data;
1650 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1651 struct ieee80211_local *local = sdata->local;
1652
1653 if (local->quiescing)
1654 return;
1655
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001656 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02001657}
1658
1659static void ieee80211_sta_monitor_work(struct work_struct *work)
1660{
1661 struct ieee80211_sub_if_data *sdata =
1662 container_of(work, struct ieee80211_sub_if_data,
1663 u.mgd.monitor_work);
1664
1665 ieee80211_mgd_probe_ap(sdata, false);
1666}
1667
Johannes Berga1678f82008-09-11 00:01:47 +02001668static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1669{
Kalle Vaload935682009-04-19 08:47:19 +03001670 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
Johannes Bergb291ba12009-07-10 15:29:03 +02001671 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1672 IEEE80211_STA_CONNECTION_POLL);
Kalle Vaload935682009-04-19 08:47:19 +03001673
Johannes Bergb291ba12009-07-10 15:29:03 +02001674 /* let's probe the connection once */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001675 ieee80211_queue_work(&sdata->local->hw,
Johannes Bergb291ba12009-07-10 15:29:03 +02001676 &sdata->u.mgd.monitor_work);
1677 /* and do all the other regular work too */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001678 ieee80211_queue_work(&sdata->local->hw,
Johannes Berg46900292009-02-15 12:44:28 +01001679 &sdata->u.mgd.work);
Kalle Vaload935682009-04-19 08:47:19 +03001680 }
Johannes Berga1678f82008-09-11 00:01:47 +02001681}
1682
Johannes Berg5bb644a2009-05-17 11:40:42 +02001683#ifdef CONFIG_PM
1684void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1685{
1686 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1687
1688 /*
1689 * we need to use atomic bitops for the running bits
1690 * only because both timers might fire at the same
1691 * time -- the code here is properly synchronised.
1692 */
1693
1694 cancel_work_sync(&ifmgd->work);
1695 cancel_work_sync(&ifmgd->beacon_loss_work);
1696 if (del_timer_sync(&ifmgd->timer))
1697 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1698
1699 cancel_work_sync(&ifmgd->chswitch_work);
1700 if (del_timer_sync(&ifmgd->chswitch_timer))
1701 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
Johannes Bergb291ba12009-07-10 15:29:03 +02001702
1703 cancel_work_sync(&ifmgd->monitor_work);
1704 /* these will just be re-established on connection */
1705 del_timer_sync(&ifmgd->conn_mon_timer);
1706 del_timer_sync(&ifmgd->bcn_mon_timer);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001707}
1708
1709void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1710{
1711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1712
1713 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1714 add_timer(&ifmgd->timer);
1715 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1716 add_timer(&ifmgd->chswitch_timer);
1717}
1718#endif
1719
Johannes Berg9c6bd792008-09-11 00:01:52 +02001720/* interface setup */
1721void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1722{
Johannes Berg46900292009-02-15 12:44:28 +01001723 struct ieee80211_if_managed *ifmgd;
Johannes Berg9c6bd792008-09-11 00:01:52 +02001724
Johannes Berg46900292009-02-15 12:44:28 +01001725 ifmgd = &sdata->u.mgd;
1726 INIT_WORK(&ifmgd->work, ieee80211_sta_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02001727 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
Johannes Berg46900292009-02-15 12:44:28 +01001728 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
Kalle Valo04de8382009-03-22 21:57:35 +02001729 INIT_WORK(&ifmgd->beacon_loss_work, ieee80211_beacon_loss_work);
Johannes Berg46900292009-02-15 12:44:28 +01001730 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
Johannes Berg9c6bd792008-09-11 00:01:52 +02001731 (unsigned long) sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02001732 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1733 (unsigned long) sdata);
1734 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1735 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01001736 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
Sujithc481ec92009-01-06 09:28:37 +05301737 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01001738 skb_queue_head_init(&ifmgd->skb_queue);
Johannes Berg9c6bd792008-09-11 00:01:52 +02001739
Johannes Bergab1faea2009-07-01 21:41:17 +02001740 ifmgd->flags = 0;
Johannes Bergbbbdff92009-04-16 13:27:42 +02001741
Johannes Berg77fdaa12009-07-07 03:45:17 +02001742 mutex_init(&ifmgd->mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001743
1744 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1745 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1746 else
1747 ifmgd->req_smps = IEEE80211_SMPS_OFF;
Johannes Berg9c6bd792008-09-11 00:01:52 +02001748}
1749
1750/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02001751void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1752{
1753 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
Johannes Berga1678f82008-09-11 00:01:47 +02001754
1755 /* Restart STA timers */
1756 rcu_read_lock();
1757 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1758 ieee80211_restart_sta_timer(sdata);
1759 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02001760}
Johannes Berg10f644a2009-04-16 13:17:25 +02001761
1762int ieee80211_max_network_latency(struct notifier_block *nb,
1763 unsigned long data, void *dummy)
1764{
1765 s32 latency_usec = (s32) data;
1766 struct ieee80211_local *local =
1767 container_of(nb, struct ieee80211_local,
1768 network_latency_notifier);
1769
1770 mutex_lock(&local->iflist_mtx);
1771 ieee80211_recalc_ps(local, latency_usec);
1772 mutex_unlock(&local->iflist_mtx);
1773
1774 return 0;
1775}
Johannes Berg77fdaa12009-07-07 03:45:17 +02001776
1777/* config hooks */
Johannes Bergaf6b6372009-12-23 13:15:35 +01001778static enum work_done_result
1779ieee80211_probe_auth_done(struct ieee80211_work *wk,
1780 struct sk_buff *skb)
1781{
1782 if (!skb) {
1783 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
1784 return WORK_DONE_DESTROY;
1785 }
1786
1787 if (wk->type == IEEE80211_WORK_AUTH) {
1788 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
1789 return WORK_DONE_DESTROY;
1790 }
1791
1792 mutex_lock(&wk->sdata->u.mgd.mtx);
1793 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
1794 mutex_unlock(&wk->sdata->u.mgd.mtx);
1795
1796 wk->type = IEEE80211_WORK_AUTH;
1797 wk->probe_auth.tries = 0;
1798 return WORK_DONE_REQUEUE;
1799}
1800
Johannes Berg77fdaa12009-07-07 03:45:17 +02001801int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1802 struct cfg80211_auth_request *req)
1803{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001804 const u8 *ssid;
Johannes Bergf679f652009-12-23 13:15:34 +01001805 struct ieee80211_work *wk;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001806 u16 auth_alg;
1807
1808 switch (req->auth_type) {
1809 case NL80211_AUTHTYPE_OPEN_SYSTEM:
1810 auth_alg = WLAN_AUTH_OPEN;
1811 break;
1812 case NL80211_AUTHTYPE_SHARED_KEY:
1813 auth_alg = WLAN_AUTH_SHARED_KEY;
1814 break;
1815 case NL80211_AUTHTYPE_FT:
1816 auth_alg = WLAN_AUTH_FT;
1817 break;
1818 case NL80211_AUTHTYPE_NETWORK_EAP:
1819 auth_alg = WLAN_AUTH_LEAP;
1820 break;
1821 default:
1822 return -EOPNOTSUPP;
1823 }
1824
1825 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
1826 if (!wk)
1827 return -ENOMEM;
1828
Joe Perches5e124bd2010-01-08 22:33:38 -08001829 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001830
1831 if (req->ie && req->ie_len) {
1832 memcpy(wk->ie, req->ie, req->ie_len);
1833 wk->ie_len = req->ie_len;
1834 }
1835
Johannes Bergfffd0932009-07-08 14:22:54 +02001836 if (req->key && req->key_len) {
Johannes Bergaf6b6372009-12-23 13:15:35 +01001837 wk->probe_auth.key_len = req->key_len;
1838 wk->probe_auth.key_idx = req->key_idx;
1839 memcpy(wk->probe_auth.key, req->key, req->key_len);
Johannes Bergfffd0932009-07-08 14:22:54 +02001840 }
1841
Johannes Berg77fdaa12009-07-07 03:45:17 +02001842 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001843 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
1844 wk->probe_auth.ssid_len = ssid[1];
Johannes Berg77fdaa12009-07-07 03:45:17 +02001845
Johannes Bergaf6b6372009-12-23 13:15:35 +01001846 wk->probe_auth.algorithm = auth_alg;
1847 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
Johannes Bergf679f652009-12-23 13:15:34 +01001848
Johannes Berg070bb542010-02-03 13:57:46 +01001849 /* if we already have a probe, don't probe again */
1850 if (req->bss->proberesp_ies)
1851 wk->type = IEEE80211_WORK_AUTH;
1852 else
1853 wk->type = IEEE80211_WORK_DIRECT_PROBE;
Johannes Bergf679f652009-12-23 13:15:34 +01001854 wk->chan = req->bss->channel;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001855 wk->sdata = sdata;
1856 wk->done = ieee80211_probe_auth_done;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001857
Johannes Bergaf6b6372009-12-23 13:15:35 +01001858 ieee80211_add_work(wk);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001859 return 0;
1860}
1861
Johannes Bergaf6b6372009-12-23 13:15:35 +01001862static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
1863 struct sk_buff *skb)
1864{
1865 struct ieee80211_mgmt *mgmt;
1866 u16 status;
1867
1868 if (!skb) {
1869 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
1870 return WORK_DONE_DESTROY;
1871 }
1872
1873 mgmt = (void *)skb->data;
1874 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
1875
1876 if (status == WLAN_STATUS_SUCCESS) {
1877 mutex_lock(&wk->sdata->u.mgd.mtx);
1878 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
1879 mutex_unlock(&wk->sdata->u.mgd.mtx);
1880 /* oops -- internal error -- send timeout for now */
1881 cfg80211_send_assoc_timeout(wk->sdata->dev,
1882 wk->filter_ta);
1883 return WORK_DONE_DESTROY;
1884 }
1885 mutex_unlock(&wk->sdata->u.mgd.mtx);
1886 }
1887
1888 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
1889 return WORK_DONE_DESTROY;
1890}
1891
Johannes Berg77fdaa12009-07-07 03:45:17 +02001892int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1893 struct cfg80211_assoc_request *req)
1894{
1895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001896 struct ieee80211_bss *bss = (void *)req->bss->priv;
Johannes Bergf679f652009-12-23 13:15:34 +01001897 struct ieee80211_work *wk;
Johannes Berg63f170e2009-12-23 13:15:33 +01001898 const u8 *ssid;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001899 int i;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001900
1901 mutex_lock(&ifmgd->mtx);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001902 if (ifmgd->associated) {
Jouni Malinen9c87ba62010-02-28 12:13:46 +02001903 if (!req->prev_bssid ||
1904 memcmp(req->prev_bssid, ifmgd->associated->bssid,
1905 ETH_ALEN)) {
1906 /*
1907 * We are already associated and the request was not a
1908 * reassociation request from the current BSS, so
1909 * reject it.
1910 */
1911 mutex_unlock(&ifmgd->mtx);
1912 return -EALREADY;
1913 }
1914
1915 /* Trying to reassociate - clear previous association state */
1916 ieee80211_set_disassoc(sdata);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001917 }
1918 mutex_unlock(&ifmgd->mtx);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001919
Johannes Berg63f170e2009-12-23 13:15:33 +01001920 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001921 if (!wk)
1922 return -ENOMEM;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001923
Johannes Berg77fdaa12009-07-07 03:45:17 +02001924 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
Vivek Natarajan375177b2010-02-09 14:50:28 +05301925 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001926
1927 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
1928 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
1929 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
1930 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
1931 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
1932
Johannes Berg77fdaa12009-07-07 03:45:17 +02001933
1934 if (req->ie && req->ie_len) {
1935 memcpy(wk->ie, req->ie, req->ie_len);
1936 wk->ie_len = req->ie_len;
1937 } else
1938 wk->ie_len = 0;
1939
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001940 wk->assoc.bss = req->bss;
Johannes Bergf679f652009-12-23 13:15:34 +01001941
Johannes Bergaf6b6372009-12-23 13:15:35 +01001942 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
Johannes Bergf679f652009-12-23 13:15:34 +01001943
Johannes Bergaf6b6372009-12-23 13:15:35 +01001944 /* new association always uses requested smps mode */
1945 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
1946 if (ifmgd->powersave)
1947 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
1948 else
1949 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
1950 } else
1951 ifmgd->ap_smps = ifmgd->req_smps;
1952
1953 wk->assoc.smps = ifmgd->ap_smps;
Johannes Berg77c81442009-12-23 13:15:37 +01001954 /*
1955 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
1956 * We still associate in non-HT mode (11a/b/g) if any one of these
1957 * ciphers is configured as pairwise.
1958 * We can set this to true for non-11n hardware, that'll be checked
1959 * separately along with the peer capabilities.
1960 */
Johannes Bergaf6b6372009-12-23 13:15:35 +01001961 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
Johannes Bergf679f652009-12-23 13:15:34 +01001962 wk->assoc.capability = req->bss->capability;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001963 wk->assoc.wmm_used = bss->wmm_used;
1964 wk->assoc.supp_rates = bss->supp_rates;
1965 wk->assoc.supp_rates_len = bss->supp_rates_len;
Johannes Bergf679f652009-12-23 13:15:34 +01001966 wk->assoc.ht_information_ie =
1967 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
Johannes Berg63f170e2009-12-23 13:15:33 +01001968
Kalle Valoab133152010-01-12 10:42:31 +02001969 if (bss->wmm_used && bss->uapsd_supported &&
1970 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
1971 wk->assoc.uapsd_used = true;
1972 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
1973 } else {
1974 wk->assoc.uapsd_used = false;
1975 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
1976 }
1977
Johannes Berg63f170e2009-12-23 13:15:33 +01001978 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
Johannes Bergf679f652009-12-23 13:15:34 +01001979 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
1980 wk->assoc.ssid_len = ssid[1];
Johannes Berg63f170e2009-12-23 13:15:33 +01001981
Johannes Berg77fdaa12009-07-07 03:45:17 +02001982 if (req->prev_bssid)
Johannes Bergf679f652009-12-23 13:15:34 +01001983 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001984
Johannes Bergf679f652009-12-23 13:15:34 +01001985 wk->type = IEEE80211_WORK_ASSOC;
Johannes Bergf679f652009-12-23 13:15:34 +01001986 wk->chan = req->bss->channel;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001987 wk->sdata = sdata;
1988 wk->done = ieee80211_assoc_done;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001989
1990 if (req->use_mfp) {
1991 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
1992 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
1993 } else {
1994 ifmgd->mfp = IEEE80211_MFP_DISABLED;
1995 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
1996 }
1997
1998 if (req->crypto.control_port)
1999 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2000 else
2001 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2002
Johannes Bergaf6b6372009-12-23 13:15:35 +01002003 ieee80211_add_work(wk);
2004 return 0;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002005}
2006
2007int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503dd2009-07-07 03:56:11 +02002008 struct cfg80211_deauth_request *req,
2009 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002010{
Johannes Bergaf6b6372009-12-23 13:15:35 +01002011 struct ieee80211_local *local = sdata->local;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergf679f652009-12-23 13:15:34 +01002013 struct ieee80211_work *wk;
Johannes Berg63f170e2009-12-23 13:15:33 +01002014 const u8 *bssid = req->bss->bssid;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002015
Johannes Berg77fdaa12009-07-07 03:45:17 +02002016 mutex_lock(&ifmgd->mtx);
2017
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002018 if (ifmgd->associated == req->bss) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002019 bssid = req->bss->bssid;
Johannes Berg63f170e2009-12-23 13:15:33 +01002020 ieee80211_set_disassoc(sdata);
Johannes Berga58ce432009-11-19 12:45:42 +01002021 mutex_unlock(&ifmgd->mtx);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002022 } else {
2023 bool not_auth_yet = false;
Johannes Berga58ce432009-11-19 12:45:42 +01002024
Johannes Bergaf6b6372009-12-23 13:15:35 +01002025 mutex_unlock(&ifmgd->mtx);
2026
2027 mutex_lock(&local->work_mtx);
2028 list_for_each_entry(wk, &local->work_list, list) {
Johannes Berg29165e42010-02-06 15:20:13 +01002029 if (wk->sdata != sdata)
Johannes Bergaf6b6372009-12-23 13:15:35 +01002030 continue;
Johannes Berg29165e42010-02-06 15:20:13 +01002031
2032 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
2033 wk->type != IEEE80211_WORK_AUTH)
2034 continue;
2035
Johannes Bergaf6b6372009-12-23 13:15:35 +01002036 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2037 continue;
Johannes Berg29165e42010-02-06 15:20:13 +01002038
2039 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2040 list_del_rcu(&wk->list);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002041 free_work(wk);
2042 break;
2043 }
2044 mutex_unlock(&local->work_mtx);
2045
2046 /*
2047 * If somebody requests authentication and we haven't
2048 * sent out an auth frame yet there's no need to send
2049 * out a deauth frame either. If the state was PROBE,
2050 * then this is the case. If it's AUTH we have sent a
2051 * frame, and if it's IDLE we have completed the auth
2052 * process already.
2053 */
2054 if (not_auth_yet) {
2055 __cfg80211_auth_canceled(sdata->dev, bssid);
2056 return 0;
2057 }
2058 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02002059
Johannes Berg0ff71612009-09-26 14:45:41 +02002060 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01002061 sdata->name, bssid, req->reason_code);
Johannes Berg0ff71612009-09-26 14:45:41 +02002062
Johannes Berg77fdaa12009-07-07 03:45:17 +02002063 ieee80211_send_deauth_disassoc(sdata, bssid,
Johannes Berg667503dd2009-07-07 03:56:11 +02002064 IEEE80211_STYPE_DEAUTH, req->reason_code,
2065 cookie);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002066
Johannes Bergbc83b682009-11-29 12:19:06 +01002067 ieee80211_recalc_idle(sdata->local);
2068
Johannes Berg77fdaa12009-07-07 03:45:17 +02002069 return 0;
2070}
2071
2072int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503dd2009-07-07 03:56:11 +02002073 struct cfg80211_disassoc_request *req,
2074 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002075{
2076 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2077
Johannes Berg77fdaa12009-07-07 03:45:17 +02002078 mutex_lock(&ifmgd->mtx);
2079
Johannes Berg8d8b2612009-07-25 11:58:36 +02002080 /*
2081 * cfg80211 should catch this ... but it's racy since
2082 * we can receive a disassoc frame, process it, hand it
2083 * to cfg80211 while that's in a locked section already
2084 * trying to tell us that the user wants to disconnect.
2085 */
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002086 if (ifmgd->associated != req->bss) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002087 mutex_unlock(&ifmgd->mtx);
2088 return -ENOLINK;
2089 }
2090
Johannes Berg0ff71612009-09-26 14:45:41 +02002091 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01002092 sdata->name, req->bss->bssid, req->reason_code);
Johannes Berg0ff71612009-09-26 14:45:41 +02002093
Johannes Berg63f170e2009-12-23 13:15:33 +01002094 ieee80211_set_disassoc(sdata);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002095
2096 mutex_unlock(&ifmgd->mtx);
2097
2098 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
Johannes Berg667503dd2009-07-07 03:56:11 +02002099 IEEE80211_STYPE_DISASSOC, req->reason_code,
2100 cookie);
Johannes Bergbc83b682009-11-29 12:19:06 +01002101
2102 ieee80211_recalc_idle(sdata->local);
2103
Johannes Berg77fdaa12009-07-07 03:45:17 +02002104 return 0;
2105}
Jouni Malinen026331c2010-02-15 12:53:10 +02002106
2107int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
2108 struct ieee80211_channel *chan,
2109 enum nl80211_channel_type channel_type,
2110 const u8 *buf, size_t len, u64 *cookie)
2111{
2112 struct ieee80211_local *local = sdata->local;
2113 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2114 struct sk_buff *skb;
2115
2116 /* Check that we are on the requested channel for transmission */
2117 if ((chan != local->tmp_channel ||
2118 channel_type != local->tmp_channel_type) &&
2119 (chan != local->oper_channel ||
2120 channel_type != local->oper_channel_type))
2121 return -EBUSY;
2122
2123 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
2124 if (!skb)
2125 return -ENOMEM;
2126 skb_reserve(skb, local->hw.extra_tx_headroom);
2127
2128 memcpy(skb_put(skb, len), buf, len);
2129
2130 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
2131 IEEE80211_SKB_CB(skb)->flags |=
2132 IEEE80211_TX_INTFL_DONT_ENCRYPT;
2133 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
2134 IEEE80211_TX_CTL_REQ_TX_STATUS;
2135 skb->dev = sdata->dev;
2136 ieee80211_tx_skb(sdata, skb);
2137
2138 *cookie = (unsigned long) skb;
2139 return 0;
2140}