blob: b6c163ac22da39fd3327a30f77478e27cb81756c [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
Jouni Malinen17e4ec12010-03-29 23:28:30 -070050/*
51 * Weight given to the latest Beacon frame when calculating average signal
52 * strength for Beacon frames received in the current BSS. This must be
53 * between 1 and 15.
54 */
55#define IEEE80211_SIGNAL_AVE_WEIGHT 3
56
Johannes Berg5bb644a2009-05-17 11:40:42 +020057#define TMR_RUNNING_TIMER 0
58#define TMR_RUNNING_CHANSW 1
59
Johannes Berg77fdaa12009-07-07 03:45:17 +020060/*
61 * All cfg80211 functions have to be called outside a locked
62 * section so that they can acquire a lock themselves... This
63 * is much simpler than queuing up things in cfg80211, but we
64 * do need some indirection for that here.
65 */
66enum rx_mgmt_action {
67 /* no action required */
68 RX_MGMT_NONE,
69
70 /* caller must call cfg80211_send_rx_auth() */
71 RX_MGMT_CFG80211_AUTH,
72
73 /* caller must call cfg80211_send_rx_assoc() */
74 RX_MGMT_CFG80211_ASSOC,
75
76 /* caller must call cfg80211_send_deauth() */
77 RX_MGMT_CFG80211_DEAUTH,
78
79 /* caller must call cfg80211_send_disassoc() */
80 RX_MGMT_CFG80211_DISASSOC,
81
Johannes Berg5d1ec852009-12-02 12:43:43 +010082 /* caller must tell cfg80211 about internal error */
83 RX_MGMT_CFG80211_ASSOC_ERROR,
Johannes Berg77fdaa12009-07-07 03:45:17 +020084};
85
Johannes Berg5484e232008-09-08 17:44:27 +020086/* utils */
Johannes Berg77fdaa12009-07-07 03:45:17 +020087static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
88{
89 WARN_ON(!mutex_is_locked(&ifmgd->mtx));
90}
91
Johannes Bergca386f32009-07-10 02:39:48 +020092/*
93 * We can have multiple work items (and connection probing)
94 * scheduling this timer, but we need to take care to only
95 * reschedule it when it should fire _earlier_ than it was
96 * asked for before, or if it's not pending right now. This
97 * function ensures that. Note that it then is required to
98 * run this function for all timeouts after the first one
99 * has happened -- the work that runs from this timer will
100 * do that.
101 */
102static void run_again(struct ieee80211_if_managed *ifmgd,
103 unsigned long timeout)
104{
105 ASSERT_MGD_MTX(ifmgd);
106
107 if (!timer_pending(&ifmgd->timer) ||
108 time_before(timeout, ifmgd->timer.expires))
109 mod_timer(&ifmgd->timer, timeout);
110}
111
Johannes Bergb291ba12009-07-10 15:29:03 +0200112static void mod_beacon_timer(struct ieee80211_sub_if_data *sdata)
113{
114 if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
115 return;
116
117 mod_timer(&sdata->u.mgd.bcn_mon_timer,
118 round_jiffies_up(jiffies + IEEE80211_BEACON_LOSS_TIME));
119}
120
Johannes Berg5484e232008-09-08 17:44:27 +0200121static int ecw2cw(int ecw)
Johannes Berg60f8b392008-09-08 17:44:22 +0200122{
Johannes Berg5484e232008-09-08 17:44:27 +0200123 return (1 << ecw) - 1;
Johannes Berg60f8b392008-09-08 17:44:22 +0200124}
125
Johannes Bergd5522e02009-03-30 13:23:35 +0200126/*
127 * ieee80211_enable_ht should be called only after the operating band
128 * has been determined as ht configuration depends on the hw's
129 * HT abilities for a specific band.
130 */
131static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
132 struct ieee80211_ht_info *hti,
Johannes Berg77fdaa12009-07-07 03:45:17 +0200133 const u8 *bssid, u16 ap_ht_cap_flags)
Johannes Bergd5522e02009-03-30 13:23:35 +0200134{
135 struct ieee80211_local *local = sdata->local;
136 struct ieee80211_supported_band *sband;
Johannes Bergd5522e02009-03-30 13:23:35 +0200137 struct sta_info *sta;
138 u32 changed = 0;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200139 u16 ht_opmode;
Johannes Berg0aaffa92010-05-05 15:28:27 +0200140 bool enable_ht = true;
141 enum nl80211_channel_type prev_chantype;
Johannes Bergd5522e02009-03-30 13:23:35 +0200142 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
143
144 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
145
Johannes Berg0aaffa92010-05-05 15:28:27 +0200146 prev_chantype = sdata->vif.bss_conf.channel_type;
147
Johannes Bergd5522e02009-03-30 13:23:35 +0200148 /* HT is not supported */
149 if (!sband->ht_cap.ht_supported)
150 enable_ht = false;
151
152 /* check that channel matches the right operating channel */
153 if (local->hw.conf.channel->center_freq !=
154 ieee80211_channel_to_frequency(hti->control_chan))
155 enable_ht = false;
156
157 if (enable_ht) {
158 channel_type = NL80211_CHAN_HT20;
159
160 if (!(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) &&
161 (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) &&
162 (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) {
163 switch(hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
164 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
Luis R. Rodriguez768777e2009-05-02 00:37:19 -0400165 if (!(local->hw.conf.channel->flags &
166 IEEE80211_CHAN_NO_HT40PLUS))
167 channel_type = NL80211_CHAN_HT40PLUS;
Johannes Bergd5522e02009-03-30 13:23:35 +0200168 break;
169 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
Luis R. Rodriguez768777e2009-05-02 00:37:19 -0400170 if (!(local->hw.conf.channel->flags &
171 IEEE80211_CHAN_NO_HT40MINUS))
172 channel_type = NL80211_CHAN_HT40MINUS;
Johannes Bergd5522e02009-03-30 13:23:35 +0200173 break;
174 }
175 }
176 }
177
Reinette Chatrefe6f2122010-04-19 10:46:31 -0700178 if (local->tmp_channel)
179 local->tmp_channel_type = channel_type;
Johannes Bergd5522e02009-03-30 13:23:35 +0200180
Johannes Berg0aaffa92010-05-05 15:28:27 +0200181 if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
182 /* can only fail due to HT40+/- mismatch */
183 channel_type = NL80211_CHAN_HT20;
184 WARN_ON(!ieee80211_set_channel_type(local, sdata, channel_type));
185 }
Johannes Bergd5522e02009-03-30 13:23:35 +0200186
Johannes Berg0aaffa92010-05-05 15:28:27 +0200187 /* channel_type change automatically detected */
188 ieee80211_hw_config(local, 0);
189
190 if (prev_chantype != channel_type) {
Johannes Bergd5522e02009-03-30 13:23:35 +0200191 rcu_read_lock();
Johannes Bergabe60632009-11-25 17:46:18 +0100192 sta = sta_info_get(sdata, bssid);
Johannes Bergd5522e02009-03-30 13:23:35 +0200193 if (sta)
194 rate_control_rate_update(local, sband, sta,
Sujith4fa00432010-03-01 14:42:57 +0530195 IEEE80211_RC_HT_CHANGED,
Johannes Berg0aaffa92010-05-05 15:28:27 +0200196 channel_type);
Johannes Bergd5522e02009-03-30 13:23:35 +0200197 rcu_read_unlock();
Johannes Berg0aaffa92010-05-05 15:28:27 +0200198 }
Johannes Bergd5522e02009-03-30 13:23:35 +0200199
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200200 ht_opmode = le16_to_cpu(hti->operation_mode);
Johannes Bergd5522e02009-03-30 13:23:35 +0200201
202 /* if bss configuration changed store the new one */
Johannes Berg0aaffa92010-05-05 15:28:27 +0200203 if (sdata->ht_opmode_valid != enable_ht ||
204 sdata->vif.bss_conf.ht_operation_mode != ht_opmode ||
205 prev_chantype != channel_type) {
Johannes Bergd5522e02009-03-30 13:23:35 +0200206 changed |= BSS_CHANGED_HT;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200207 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
Johannes Berg0aaffa92010-05-05 15:28:27 +0200208 sdata->ht_opmode_valid = enable_ht;
Johannes Bergd5522e02009-03-30 13:23:35 +0200209 }
210
211 return changed;
212}
213
Johannes Berg9c6bd792008-09-11 00:01:52 +0200214/* frame sending functions */
215
Johannes Bergef422bc2008-09-09 10:58:25 +0200216static void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503d2009-07-07 03:56:11 +0200217 const u8 *bssid, u16 stype, u16 reason,
Jouni Malinend5cdfac2010-04-04 09:37:19 +0300218 void *cookie, bool send_frame)
Johannes Berg9ac19a92008-09-09 10:57:09 +0200219{
220 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg9ac19a92008-09-09 10:57:09 +0200222 struct sk_buff *skb;
223 struct ieee80211_mgmt *mgmt;
224
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200225 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt));
Johannes Berg9ac19a92008-09-09 10:57:09 +0200226 if (!skb) {
Johannes Bergef422bc2008-09-09 10:58:25 +0200227 printk(KERN_DEBUG "%s: failed to allocate buffer for "
Johannes Berg47846c92009-11-25 17:46:19 +0100228 "deauth/disassoc frame\n", sdata->name);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200229 return;
230 }
231 skb_reserve(skb, local->hw.extra_tx_headroom);
232
233 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
234 memset(mgmt, 0, 24);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200235 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100236 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200237 memcpy(mgmt->bssid, bssid, ETH_ALEN);
Johannes Bergef422bc2008-09-09 10:58:25 +0200238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200239 skb_put(skb, 2);
Johannes Bergef422bc2008-09-09 10:58:25 +0200240 /* u.deauth.reason_code == u.disassoc.reason_code */
Johannes Berg9ac19a92008-09-09 10:57:09 +0200241 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
242
Jouni Malinen53b46b82009-03-27 20:53:56 +0200243 if (stype == IEEE80211_STYPE_DEAUTH)
Holger Schurigce470612009-10-13 13:28:13 +0200244 if (cookie)
245 __cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
246 else
247 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Jouni Malinen53b46b82009-03-27 20:53:56 +0200248 else
Holger Schurigce470612009-10-13 13:28:13 +0200249 if (cookie)
250 __cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
251 else
252 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg62ae67b2009-11-18 18:42:05 +0100253 if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
254 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Jouni Malinend5cdfac2010-04-04 09:37:19 +0300255
256 if (send_frame)
257 ieee80211_tx_skb(sdata, skb);
258 else
259 kfree_skb(skb);
Johannes Berg9ac19a92008-09-09 10:57:09 +0200260}
261
Kalle Valo572e0012009-02-10 17:09:31 +0200262void ieee80211_send_pspoll(struct ieee80211_local *local,
263 struct ieee80211_sub_if_data *sdata)
264{
Kalle Valo572e0012009-02-10 17:09:31 +0200265 struct ieee80211_pspoll *pspoll;
266 struct sk_buff *skb;
Kalle Valo572e0012009-02-10 17:09:31 +0200267
Kalle Valod8cd1892010-01-05 20:16:26 +0200268 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
269 if (!skb)
Kalle Valo572e0012009-02-10 17:09:31 +0200270 return;
Kalle Valo572e0012009-02-10 17:09:31 +0200271
Kalle Valod8cd1892010-01-05 20:16:26 +0200272 pspoll = (struct ieee80211_pspoll *) skb->data;
273 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
Kalle Valo572e0012009-02-10 17:09:31 +0200274
Johannes Berg62ae67b2009-11-18 18:42:05 +0100275 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
276 ieee80211_tx_skb(sdata, skb);
Kalle Valo572e0012009-02-10 17:09:31 +0200277}
278
Johannes Berg965beda2009-04-16 13:17:24 +0200279void ieee80211_send_nullfunc(struct ieee80211_local *local,
280 struct ieee80211_sub_if_data *sdata,
281 int powersave)
282{
283 struct sk_buff *skb;
Kalle Valod8cd1892010-01-05 20:16:26 +0200284 struct ieee80211_hdr_3addr *nullfunc;
Johannes Berg965beda2009-04-16 13:17:24 +0200285
Kalle Valod8cd1892010-01-05 20:16:26 +0200286 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
287 if (!skb)
Johannes Berg965beda2009-04-16 13:17:24 +0200288 return;
289
Kalle Valod8cd1892010-01-05 20:16:26 +0200290 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
Johannes Berg965beda2009-04-16 13:17:24 +0200291 if (powersave)
Kalle Valod8cd1892010-01-05 20:16:26 +0200292 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
Johannes Berg965beda2009-04-16 13:17:24 +0200293
Johannes Berg62ae67b2009-11-18 18:42:05 +0100294 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
295 ieee80211_tx_skb(sdata, skb);
Johannes Berg965beda2009-04-16 13:17:24 +0200296}
297
Felix Fietkaud5242152010-01-08 18:06:26 +0100298static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
299 struct ieee80211_sub_if_data *sdata)
300{
301 struct sk_buff *skb;
302 struct ieee80211_hdr *nullfunc;
303 __le16 fc;
304
305 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
306 return;
307
308 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
309 if (!skb) {
310 printk(KERN_DEBUG "%s: failed to allocate buffer for 4addr "
311 "nullfunc frame\n", sdata->name);
312 return;
313 }
314 skb_reserve(skb, local->hw.extra_tx_headroom);
315
316 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
317 memset(nullfunc, 0, 30);
318 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
319 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
320 nullfunc->frame_control = fc;
321 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
322 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
323 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
324 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
325
326 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
327 ieee80211_tx_skb(sdata, skb);
328}
329
Johannes Bergcc32abd2009-05-15 11:52:31 +0200330/* spectrum management related things */
331static void ieee80211_chswitch_work(struct work_struct *work)
332{
333 struct ieee80211_sub_if_data *sdata =
334 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200335 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
336
Johannes Berg9607e6b2009-12-23 13:15:31 +0100337 if (!ieee80211_sdata_running(sdata))
Johannes Bergcc32abd2009-05-15 11:52:31 +0200338 return;
339
Johannes Berg77fdaa12009-07-07 03:45:17 +0200340 mutex_lock(&ifmgd->mtx);
341 if (!ifmgd->associated)
342 goto out;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200343
344 sdata->local->oper_channel = sdata->local->csa_channel;
Johannes Berg5ce6e432010-05-11 16:20:57 +0200345 if (!sdata->local->ops->channel_switch) {
346 /* call "hw_config" only if doing sw channel switch */
347 ieee80211_hw_config(sdata->local,
348 IEEE80211_CONF_CHANGE_CHANNEL);
349 }
Johannes Bergcc32abd2009-05-15 11:52:31 +0200350
Johannes Berg77fdaa12009-07-07 03:45:17 +0200351 /* XXX: shouldn't really modify cfg80211-owned data! */
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100352 ifmgd->associated->channel = sdata->local->oper_channel;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200353
Johannes Bergcc32abd2009-05-15 11:52:31 +0200354 ieee80211_wake_queues_by_reason(&sdata->local->hw,
355 IEEE80211_QUEUE_STOP_REASON_CSA);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200356 out:
357 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
358 mutex_unlock(&ifmgd->mtx);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200359}
360
Johannes Berg5ce6e432010-05-11 16:20:57 +0200361void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
362{
363 struct ieee80211_sub_if_data *sdata;
364 struct ieee80211_if_managed *ifmgd;
365
366 sdata = vif_to_sdata(vif);
367 ifmgd = &sdata->u.mgd;
368
369 trace_api_chswitch_done(sdata, success);
370 if (!success) {
371 /*
372 * If the channel switch was not successful, stay
373 * around on the old channel. We currently lack
374 * good handling of this situation, possibly we
375 * should just drop the association.
376 */
377 sdata->local->csa_channel = sdata->local->oper_channel;
378 }
379
380 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
381}
382EXPORT_SYMBOL(ieee80211_chswitch_done);
383
Johannes Bergcc32abd2009-05-15 11:52:31 +0200384static void ieee80211_chswitch_timer(unsigned long data)
385{
386 struct ieee80211_sub_if_data *sdata =
387 (struct ieee80211_sub_if_data *) data;
388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
389
Johannes Berg5bb644a2009-05-17 11:40:42 +0200390 if (sdata->local->quiescing) {
391 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
392 return;
393 }
394
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400395 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200396}
397
398void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
399 struct ieee80211_channel_sw_ie *sw_elem,
Johannes Berg5ce6e432010-05-11 16:20:57 +0200400 struct ieee80211_bss *bss,
401 u64 timestamp)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200402{
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100403 struct cfg80211_bss *cbss =
404 container_of((void *)bss, struct cfg80211_bss, priv);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200405 struct ieee80211_channel *new_ch;
406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
407 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num);
408
Johannes Berg77fdaa12009-07-07 03:45:17 +0200409 ASSERT_MGD_MTX(ifmgd);
410
411 if (!ifmgd->associated)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200412 return;
413
Helmut Schaafbe9c422009-07-23 12:14:04 +0200414 if (sdata->local->scanning)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200415 return;
416
417 /* Disregard subsequent beacons if we are already running a timer
418 processing a CSA */
419
420 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
421 return;
422
423 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
424 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED)
425 return;
426
427 sdata->local->csa_channel = new_ch;
428
Johannes Berg5ce6e432010-05-11 16:20:57 +0200429 if (sdata->local->ops->channel_switch) {
430 /* use driver's channel switch callback */
431 struct ieee80211_channel_switch ch_switch;
432 memset(&ch_switch, 0, sizeof(ch_switch));
433 ch_switch.timestamp = timestamp;
434 if (sw_elem->mode) {
435 ch_switch.block_tx = true;
436 ieee80211_stop_queues_by_reason(&sdata->local->hw,
437 IEEE80211_QUEUE_STOP_REASON_CSA);
438 }
439 ch_switch.channel = new_ch;
440 ch_switch.count = sw_elem->count;
441 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
442 drv_channel_switch(sdata->local, &ch_switch);
443 return;
444 }
445
446 /* channel switch handled in software */
Johannes Bergcc32abd2009-05-15 11:52:31 +0200447 if (sw_elem->count <= 1) {
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400448 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200449 } else {
Wey-Yi Guy9feaddc2010-05-05 20:34:02 -0700450 if (sw_elem->mode)
451 ieee80211_stop_queues_by_reason(&sdata->local->hw,
Johannes Bergcc32abd2009-05-15 11:52:31 +0200452 IEEE80211_QUEUE_STOP_REASON_CSA);
453 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
454 mod_timer(&ifmgd->chswitch_timer,
455 jiffies +
456 msecs_to_jiffies(sw_elem->count *
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100457 cbss->beacon_interval));
Johannes Bergcc32abd2009-05-15 11:52:31 +0200458 }
459}
460
461static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
462 u16 capab_info, u8 *pwr_constr_elem,
463 u8 pwr_constr_elem_len)
464{
465 struct ieee80211_conf *conf = &sdata->local->hw.conf;
466
467 if (!(capab_info & WLAN_CAPABILITY_SPECTRUM_MGMT))
468 return;
469
470 /* Power constraint IE length should be 1 octet */
471 if (pwr_constr_elem_len != 1)
472 return;
473
474 if ((*pwr_constr_elem <= conf->channel->max_power) &&
475 (*pwr_constr_elem != sdata->local->power_constr_level)) {
476 sdata->local->power_constr_level = *pwr_constr_elem;
477 ieee80211_hw_config(sdata->local, 0);
478 }
479}
480
Juuso Oikarinenf90754c2010-06-21 08:59:39 +0300481void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
482{
483 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
484 struct ieee80211_local *local = sdata->local;
485 struct ieee80211_conf *conf = &local->hw.conf;
486
487 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
488 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
489 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
490
491 local->disable_dynamic_ps = false;
492 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
493}
494EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
495
496void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
497{
498 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
499 struct ieee80211_local *local = sdata->local;
500 struct ieee80211_conf *conf = &local->hw.conf;
501
502 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
503 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
504 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
505
506 local->disable_dynamic_ps = true;
507 conf->dynamic_ps_timeout = 0;
508 del_timer_sync(&local->dynamic_ps_timer);
509 ieee80211_queue_work(&local->hw,
510 &local->dynamic_ps_enable_work);
511}
512EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
513
Johannes Berg965beda2009-04-16 13:17:24 +0200514/* powersave */
515static void ieee80211_enable_ps(struct ieee80211_local *local,
516 struct ieee80211_sub_if_data *sdata)
517{
518 struct ieee80211_conf *conf = &local->hw.conf;
519
Johannes Bergd5edaed2009-04-22 23:02:51 +0200520 /*
521 * If we are scanning right now then the parameters will
522 * take effect when scan finishes.
523 */
Helmut Schaafbe9c422009-07-23 12:14:04 +0200524 if (local->scanning)
Johannes Bergd5edaed2009-04-22 23:02:51 +0200525 return;
526
Johannes Berg965beda2009-04-16 13:17:24 +0200527 if (conf->dynamic_ps_timeout > 0 &&
528 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
529 mod_timer(&local->dynamic_ps_timer, jiffies +
530 msecs_to_jiffies(conf->dynamic_ps_timeout));
531 } else {
532 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
533 ieee80211_send_nullfunc(local, sdata, 1);
Vivek Natarajan375177b2010-02-09 14:50:28 +0530534
Juuso Oikarinen2a130522010-03-09 14:25:02 +0200535 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
536 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
537 return;
538
539 conf->flags |= IEEE80211_CONF_PS;
540 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
Johannes Berg965beda2009-04-16 13:17:24 +0200541 }
542}
543
544static void ieee80211_change_ps(struct ieee80211_local *local)
545{
546 struct ieee80211_conf *conf = &local->hw.conf;
547
548 if (local->ps_sdata) {
Johannes Berg965beda2009-04-16 13:17:24 +0200549 ieee80211_enable_ps(local, local->ps_sdata);
550 } else if (conf->flags & IEEE80211_CONF_PS) {
551 conf->flags &= ~IEEE80211_CONF_PS;
552 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
553 del_timer_sync(&local->dynamic_ps_timer);
554 cancel_work_sync(&local->dynamic_ps_enable_work);
555 }
556}
557
558/* need to hold RTNL or interface lock */
Johannes Berg10f644a2009-04-16 13:17:25 +0200559void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
Johannes Berg965beda2009-04-16 13:17:24 +0200560{
561 struct ieee80211_sub_if_data *sdata, *found = NULL;
562 int count = 0;
Juuso Oikarinen195e2942010-04-27 12:47:40 +0300563 int timeout;
Johannes Berg965beda2009-04-16 13:17:24 +0200564
565 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
566 local->ps_sdata = NULL;
567 return;
568 }
569
Johannes Bergaf6b6372009-12-23 13:15:35 +0100570 if (!list_empty(&local->work_list)) {
571 local->ps_sdata = NULL;
572 goto change;
573 }
574
Johannes Berg965beda2009-04-16 13:17:24 +0200575 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg9607e6b2009-12-23 13:15:31 +0100576 if (!ieee80211_sdata_running(sdata))
Johannes Berg965beda2009-04-16 13:17:24 +0200577 continue;
578 if (sdata->vif.type != NL80211_IFTYPE_STATION)
579 continue;
580 found = sdata;
581 count++;
582 }
583
Luis R. Rodriguez43f78532009-06-10 15:16:15 +0200584 if (count == 1 && found->u.mgd.powersave &&
Johannes Bergaf6b6372009-12-23 13:15:35 +0100585 found->u.mgd.associated &&
Johannes Berg56007a02010-01-26 14:19:52 +0100586 found->u.mgd.associated->beacon_ies &&
Johannes Bergb291ba12009-07-10 15:29:03 +0200587 !(found->u.mgd.flags & (IEEE80211_STA_BEACON_POLL |
588 IEEE80211_STA_CONNECTION_POLL))) {
Juuso Oikarinenf90754c2010-06-21 08:59:39 +0300589 struct ieee80211_conf *conf = &local->hw.conf;
Johannes Berg10f644a2009-04-16 13:17:25 +0200590 s32 beaconint_us;
591
592 if (latency < 0)
Mark Grossed771342010-05-06 01:59:26 +0200593 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
Johannes Berg10f644a2009-04-16 13:17:25 +0200594
595 beaconint_us = ieee80211_tu_to_usec(
596 found->vif.bss_conf.beacon_int);
597
Juuso Oikarinenff616382010-06-09 09:51:52 +0300598 timeout = local->dynamic_ps_forced_timeout;
Juuso Oikarinen195e2942010-04-27 12:47:40 +0300599 if (timeout < 0) {
600 /*
Juuso Oikarinenff616382010-06-09 09:51:52 +0300601 * Go to full PSM if the user configures a very low
602 * latency requirement.
Juuso Oikarinen195e2942010-04-27 12:47:40 +0300603 * The 2 second value is there for compatibility until
604 * the PM_QOS_NETWORK_LATENCY is configured with real
605 * values.
606 */
Juuso Oikarinenff616382010-06-09 09:51:52 +0300607 if (latency > 1900000000 && latency != 2000000000)
Juuso Oikarinen195e2942010-04-27 12:47:40 +0300608 timeout = 0;
Juuso Oikarinenff616382010-06-09 09:51:52 +0300609 else
610 timeout = 100;
Juuso Oikarinen195e2942010-04-27 12:47:40 +0300611 }
Juuso Oikarinenf90754c2010-06-21 08:59:39 +0300612 local->dynamic_ps_user_timeout = timeout;
613 if (!local->disable_dynamic_ps)
614 conf->dynamic_ps_timeout =
615 local->dynamic_ps_user_timeout;
Juuso Oikarinen195e2942010-04-27 12:47:40 +0300616
Johannes Berg04fe2032009-04-22 18:44:37 +0200617 if (beaconint_us > latency) {
Johannes Berg10f644a2009-04-16 13:17:25 +0200618 local->ps_sdata = NULL;
Johannes Berg04fe2032009-04-22 18:44:37 +0200619 } else {
Johannes Berg56007a02010-01-26 14:19:52 +0100620 struct ieee80211_bss *bss;
Johannes Berg04fe2032009-04-22 18:44:37 +0200621 int maxslp = 1;
Johannes Berg56007a02010-01-26 14:19:52 +0100622 u8 dtimper;
Johannes Berg04fe2032009-04-22 18:44:37 +0200623
Johannes Berg56007a02010-01-26 14:19:52 +0100624 bss = (void *)found->u.mgd.associated->priv;
625 dtimper = bss->dtim_period;
626
627 /* If the TIM IE is invalid, pretend the value is 1 */
628 if (!dtimper)
629 dtimper = 1;
630 else if (dtimper > 1)
Johannes Berg04fe2032009-04-22 18:44:37 +0200631 maxslp = min_t(int, dtimper,
632 latency / beaconint_us);
633
Johannes Berg9ccebe62009-04-23 10:32:36 +0200634 local->hw.conf.max_sleep_period = maxslp;
Johannes Berg56007a02010-01-26 14:19:52 +0100635 local->hw.conf.ps_dtim_period = dtimper;
Johannes Berg10f644a2009-04-16 13:17:25 +0200636 local->ps_sdata = found;
Johannes Berg04fe2032009-04-22 18:44:37 +0200637 }
Johannes Berg10f644a2009-04-16 13:17:25 +0200638 } else {
Johannes Berg965beda2009-04-16 13:17:24 +0200639 local->ps_sdata = NULL;
Johannes Berg10f644a2009-04-16 13:17:25 +0200640 }
Johannes Berg965beda2009-04-16 13:17:24 +0200641
Johannes Bergaf6b6372009-12-23 13:15:35 +0100642 change:
Johannes Berg965beda2009-04-16 13:17:24 +0200643 ieee80211_change_ps(local);
644}
645
646void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
647{
648 struct ieee80211_local *local =
649 container_of(work, struct ieee80211_local,
650 dynamic_ps_disable_work);
651
652 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
653 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
654 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
655 }
656
657 ieee80211_wake_queues_by_reason(&local->hw,
658 IEEE80211_QUEUE_STOP_REASON_PS);
659}
660
661void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
662{
663 struct ieee80211_local *local =
664 container_of(work, struct ieee80211_local,
665 dynamic_ps_enable_work);
666 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
Vivek Natarajan375177b2010-02-09 14:50:28 +0530667 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg965beda2009-04-16 13:17:24 +0200668
669 /* can only happen when PS was just disabled anyway */
670 if (!sdata)
671 return;
672
673 if (local->hw.conf.flags & IEEE80211_CONF_PS)
674 return;
675
Vivek Natarajan375177b2010-02-09 14:50:28 +0530676 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
677 (!(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)))
Johannes Berg965beda2009-04-16 13:17:24 +0200678 ieee80211_send_nullfunc(local, sdata, 1);
679
Juuso Oikarinen2a130522010-03-09 14:25:02 +0200680 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
681 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
Vivek Natarajan375177b2010-02-09 14:50:28 +0530682 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
683 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
684 local->hw.conf.flags |= IEEE80211_CONF_PS;
685 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
686 }
Johannes Berg965beda2009-04-16 13:17:24 +0200687}
688
689void ieee80211_dynamic_ps_timer(unsigned long data)
690{
691 struct ieee80211_local *local = (void *) data;
692
Luis R. Rodriguez78f1a8b2009-07-27 08:38:25 -0700693 if (local->quiescing || local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +0200694 return;
695
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400696 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
Johannes Berg965beda2009-04-16 13:17:24 +0200697}
698
Johannes Berg60f8b392008-09-08 17:44:22 +0200699/* MLME */
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200700static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
Johannes Berg4ced3f72010-07-19 16:39:04 +0200701 struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -0700702 u8 *wmm_param, size_t wmm_param_len)
703{
Jiri Bencf0706e82007-05-05 11:45:53 -0700704 struct ieee80211_tx_queue_params params;
Johannes Berg4ced3f72010-07-19 16:39:04 +0200705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -0700706 size_t left;
707 int count;
Kalle Valoab133152010-01-12 10:42:31 +0200708 u8 *pos, uapsd_queues = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -0700709
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200710 if (!local->ops->conf_tx)
711 return;
712
Johannes Bergaf6b6372009-12-23 13:15:35 +0100713 if (local->hw.queues < 4)
Johannes Berg3434fbd2008-05-03 00:59:37 +0200714 return;
715
716 if (!wmm_param)
717 return;
718
Jiri Bencf0706e82007-05-05 11:45:53 -0700719 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
720 return;
Kalle Valoab133152010-01-12 10:42:31 +0200721
722 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
Kalle Valo50ae0cf2010-01-12 10:42:39 +0200723 uapsd_queues = local->uapsd_queues;
Kalle Valoab133152010-01-12 10:42:31 +0200724
Jiri Bencf0706e82007-05-05 11:45:53 -0700725 count = wmm_param[6] & 0x0f;
Johannes Berg46900292009-02-15 12:44:28 +0100726 if (count == ifmgd->wmm_last_param_set)
Jiri Bencf0706e82007-05-05 11:45:53 -0700727 return;
Johannes Berg46900292009-02-15 12:44:28 +0100728 ifmgd->wmm_last_param_set = count;
Jiri Bencf0706e82007-05-05 11:45:53 -0700729
730 pos = wmm_param + 8;
731 left = wmm_param_len - 8;
732
733 memset(&params, 0, sizeof(params));
734
Jiri Bencf0706e82007-05-05 11:45:53 -0700735 local->wmm_acm = 0;
736 for (; left >= 4; left -= 4, pos += 4) {
737 int aci = (pos[0] >> 5) & 0x03;
738 int acm = (pos[0] >> 4) & 0x01;
Kalle Valoab133152010-01-12 10:42:31 +0200739 bool uapsd = false;
Jiri Bencf0706e82007-05-05 11:45:53 -0700740 int queue;
741
742 switch (aci) {
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200743 case 1: /* AC_BK */
Johannes Berge100bb62008-04-30 18:51:21 +0200744 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +0200745 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200746 local->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
Kalle Valoab133152010-01-12 10:42:31 +0200747 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
748 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700749 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200750 case 2: /* AC_VI */
Johannes Berge100bb62008-04-30 18:51:21 +0200751 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +0200752 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200753 local->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
Kalle Valoab133152010-01-12 10:42:31 +0200754 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
755 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700756 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200757 case 3: /* AC_VO */
Johannes Berge100bb62008-04-30 18:51:21 +0200758 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +0200759 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200760 local->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
Kalle Valoab133152010-01-12 10:42:31 +0200761 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
762 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700763 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200764 case 0: /* AC_BE */
Jiri Bencf0706e82007-05-05 11:45:53 -0700765 default:
Johannes Berge100bb62008-04-30 18:51:21 +0200766 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +0200767 if (acm)
Jouni Malinen0eeb59f2009-03-05 17:23:46 +0200768 local->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
Kalle Valoab133152010-01-12 10:42:31 +0200769 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
770 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -0700771 break;
772 }
773
774 params.aifs = pos[0] & 0x0f;
775 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
776 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +0200777 params.txop = get_unaligned_le16(pos + 2);
Kalle Valoab133152010-01-12 10:42:31 +0200778 params.uapsd = uapsd;
779
Johannes Bergf4ea83d2008-06-30 15:10:46 +0200780#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Jiri Bencf0706e82007-05-05 11:45:53 -0700781 printk(KERN_DEBUG "%s: WMM queue=%d aci=%d acm=%d aifs=%d "
Kalle Valoab133152010-01-12 10:42:31 +0200782 "cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
Johannes Berg0bffe402009-06-09 16:18:32 +0200783 wiphy_name(local->hw.wiphy), queue, aci, acm,
Kalle Valoab133152010-01-12 10:42:31 +0200784 params.aifs, params.cw_min, params.cw_max, params.txop,
785 params.uapsd);
Johannes Berg3330d7b2008-02-10 16:49:38 +0100786#endif
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200787 if (drv_conf_tx(local, queue, &params))
Jiri Bencf0706e82007-05-05 11:45:53 -0700788 printk(KERN_DEBUG "%s: failed to set TX queue "
Johannes Berg0bffe402009-06-09 16:18:32 +0200789 "parameters for queue %d\n",
790 wiphy_name(local->hw.wiphy), queue);
Jiri Bencf0706e82007-05-05 11:45:53 -0700791 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200792
793 /* enable WMM or activate new settings */
Johannes Berg4ced3f72010-07-19 16:39:04 +0200794 sdata->vif.bss_conf.qos = true;
795 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
Jiri Bencf0706e82007-05-05 11:45:53 -0700796}
797
Johannes Berg7a5158e2008-10-08 10:59:33 +0200798static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
799 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +0200800{
Johannes Bergbda39332008-10-11 01:51:51 +0200801 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100802 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +0200803 bool use_protection;
804 bool use_short_preamble;
805 bool use_short_slot;
806
807 if (erp_valid) {
808 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
809 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
810 } else {
811 use_protection = false;
812 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
813 }
814
815 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Felix Fietkau43d35342010-01-15 03:00:48 +0100816 if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
817 use_short_slot = true;
Daniel Drake56282212007-07-10 19:32:10 +0200818
Johannes Berg471b3ef2007-12-28 14:32:58 +0100819 if (use_protection != bss_conf->use_cts_prot) {
Johannes Berg471b3ef2007-12-28 14:32:58 +0100820 bss_conf->use_cts_prot = use_protection;
821 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +0200822 }
Daniel Drake7e9ed182007-07-27 15:43:24 +0200823
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200824 if (use_short_preamble != bss_conf->use_short_preamble) {
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +0200825 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100826 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200827 }
Daniel Draked9430a32007-07-27 15:43:24 +0200828
Johannes Berg7a5158e2008-10-08 10:59:33 +0200829 if (use_short_slot != bss_conf->use_short_slot) {
Johannes Berg7a5158e2008-10-08 10:59:33 +0200830 bss_conf->use_short_slot = use_short_slot;
831 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -0400832 }
833
834 return changed;
835}
836
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +1200837static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100838 struct cfg80211_bss *cbss,
Johannes Bergae5eb022008-10-14 16:58:37 +0200839 u32 bss_info_changed)
Jiri Bencf0706e82007-05-05 11:45:53 -0700840{
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100841 struct ieee80211_bss *bss = (void *)cbss->priv;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100842 struct ieee80211_local *local = sdata->local;
Juuso Oikarinen68542962010-06-09 13:43:26 +0300843 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400844
Johannes Bergae5eb022008-10-14 16:58:37 +0200845 bss_info_changed |= BSS_CHANGED_ASSOC;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200846 /* set timing information */
Juuso Oikarinen68542962010-06-09 13:43:26 +0300847 bss_conf->beacon_int = cbss->beacon_interval;
848 bss_conf->timestamp = cbss->tsf;
Jiri Slabyd6f2da52007-08-28 17:01:54 -0400849
Johannes Berg77fdaa12009-07-07 03:45:17 +0200850 bss_info_changed |= BSS_CHANGED_BEACON_INT;
851 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100852 cbss->capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -0700853
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100854 sdata->u.mgd.associated = cbss;
855 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
Johannes Berg471b3ef2007-12-28 14:32:58 +0100856
Jouni Malinen17e4ec12010-03-29 23:28:30 -0700857 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
858
Johannes Bergb291ba12009-07-10 15:29:03 +0200859 /* just to be sure */
860 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
861 IEEE80211_STA_BEACON_POLL);
862
Johannes Berg01838262009-12-17 16:16:53 +0100863 /*
864 * Always handle WMM once after association regardless
865 * of the first value the AP uses. Setting -1 here has
866 * that effect because the AP values is an unsigned
867 * 4-bit value.
868 */
869 sdata->u.mgd.wmm_last_param_set = -1;
870
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200871 ieee80211_led_assoc(local, 1);
872
Johannes Berge5b900d2010-07-29 16:08:55 +0200873 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
874 bss_conf->dtim_period = bss->dtim_period;
875 else
876 bss_conf->dtim_period = 0;
877
Juuso Oikarinen68542962010-06-09 13:43:26 +0300878 bss_conf->assoc = 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200879 /*
880 * For now just always ask the driver to update the basic rateset
881 * when we have associated, we aren't checking whether it actually
882 * changed or not.
883 */
Johannes Bergae5eb022008-10-14 16:58:37 +0200884 bss_info_changed |= BSS_CHANGED_BASIC_RATES;
Johannes Berg9cef8732009-05-14 13:10:14 +0200885
886 /* And the BSSID changed - we're associated now */
887 bss_info_changed |= BSS_CHANGED_BSSID;
888
Juuso Oikarinena97c13c2010-03-23 09:02:34 +0200889 /* Tell the driver to monitor connection quality (if supported) */
890 if ((local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI) &&
Juuso Oikarinen68542962010-06-09 13:43:26 +0300891 bss_conf->cqm_rssi_thold)
Juuso Oikarinena97c13c2010-03-23 09:02:34 +0200892 bss_info_changed |= BSS_CHANGED_CQM;
893
Juuso Oikarinen68542962010-06-09 13:43:26 +0300894 /* Enable ARP filtering */
895 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
896 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
897 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
898 }
899
Johannes Bergae5eb022008-10-14 16:58:37 +0200900 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +0300901
Johannes Berg056508d2009-07-30 21:43:55 +0200902 mutex_lock(&local->iflist_mtx);
903 ieee80211_recalc_ps(local, -1);
Johannes Berg0f782312009-12-01 13:37:02 +0100904 ieee80211_recalc_smps(local, sdata);
Johannes Berg056508d2009-07-30 21:43:55 +0200905 mutex_unlock(&local->iflist_mtx);
Kalle Valoe0cb6862008-12-18 23:35:13 +0200906
John W. Linville8a5b33f2010-01-06 15:39:39 -0500907 netif_tx_start_all_queues(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200908 netif_carrier_on(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -0700909}
910
Jouni Malinene69e95d2010-03-29 23:29:31 -0700911static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
912 bool remove_sta)
Tomas Winkleraa458d12008-09-09 00:32:12 +0300913{
Johannes Berg46900292009-02-15 12:44:28 +0100914 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Tomas Winkleraa458d12008-09-09 00:32:12 +0300915 struct ieee80211_local *local = sdata->local;
916 struct sta_info *sta;
Kalle Valoe0cb6862008-12-18 23:35:13 +0200917 u32 changed = 0, config_changed = 0;
Johannes Bergb291ba12009-07-10 15:29:03 +0200918 u8 bssid[ETH_ALEN];
Tomas Winkleraa458d12008-09-09 00:32:12 +0300919
Johannes Berg77fdaa12009-07-07 03:45:17 +0200920 ASSERT_MGD_MTX(ifmgd);
921
Johannes Bergb291ba12009-07-10 15:29:03 +0200922 if (WARN_ON(!ifmgd->associated))
923 return;
924
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100925 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
Johannes Bergb291ba12009-07-10 15:29:03 +0200926
Johannes Berg77fdaa12009-07-07 03:45:17 +0200927 ifmgd->associated = NULL;
928 memset(ifmgd->bssid, 0, ETH_ALEN);
929
930 /*
931 * we need to commit the associated = NULL change because the
932 * scan code uses that to determine whether this iface should
933 * go to/wake up from powersave or not -- and could otherwise
934 * wake the queues erroneously.
935 */
936 smp_mb();
937
938 /*
939 * Thus, we can only afterwards stop the queues -- to account
940 * for the case where another CPU is finishing a scan at this
941 * time -- we don't want the scan code to enable queues.
942 */
Tomas Winkleraa458d12008-09-09 00:32:12 +0300943
John W. Linville8a5b33f2010-01-06 15:39:39 -0500944 netif_tx_stop_all_queues(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300945 netif_carrier_off(sdata->dev);
946
Johannes Berg2a419052010-06-10 10:21:29 +0200947 mutex_lock(&local->sta_mtx);
Johannes Bergabe60632009-11-25 17:46:18 +0100948 sta = sta_info_get(sdata, bssid);
Sujith4cad6c72010-02-10 14:52:21 +0530949 if (sta) {
Johannes Berg2a419052010-06-10 10:21:29 +0200950 set_sta_flags(sta, WLAN_STA_BLOCK_BA);
Johannes Berg1fa6f4a2009-06-15 18:13:58 +0200951 ieee80211_sta_tear_down_BA_sessions(sta);
Sujith4cad6c72010-02-10 14:52:21 +0530952 }
Johannes Berg2a419052010-06-10 10:21:29 +0200953 mutex_unlock(&local->sta_mtx);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300954
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200955 changed |= ieee80211_reset_erp_info(sdata);
956
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200957 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +0200958 changed |= BSS_CHANGED_ASSOC;
959 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +0200960
Johannes Bergaa837e12009-05-07 16:16:24 +0200961 ieee80211_set_wmm_default(sdata);
962
Johannes Berg47979382009-01-07 10:13:27 +0100963 /* channel(_type) changes are handled by ieee80211_hw_config */
Johannes Berg0aaffa92010-05-05 15:28:27 +0200964 WARN_ON(!ieee80211_set_channel_type(local, sdata, NL80211_CHAN_NO_HT));
Johannes Bergae5eb022008-10-14 16:58:37 +0200965
Johannes Berg413ad502009-05-08 21:21:06 +0200966 /* on the next assoc, re-program HT parameters */
967 sdata->ht_opmode_valid = false;
968
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +0530969 local->power_constr_level = 0;
970
Kalle Valo520eb822008-12-18 23:35:27 +0200971 del_timer_sync(&local->dynamic_ps_timer);
972 cancel_work_sync(&local->dynamic_ps_enable_work);
973
Kalle Valoe0cb6862008-12-18 23:35:13 +0200974 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
975 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
976 config_changed |= IEEE80211_CONF_CHANGE_PS;
977 }
978
979 ieee80211_hw_config(local, config_changed);
Johannes Berg9cef8732009-05-14 13:10:14 +0200980
Juuso Oikarinen68542962010-06-09 13:43:26 +0300981 /* Disable ARP filtering */
982 if (sdata->vif.bss_conf.arp_filter_enabled) {
983 sdata->vif.bss_conf.arp_filter_enabled = false;
984 changed |= BSS_CHANGED_ARP_FILTER;
985 }
986
Johannes Berg0aaffa92010-05-05 15:28:27 +0200987 /* The BSSID (not really interesting) and HT changed */
988 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +0200989 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +0200990
Jouni Malinene69e95d2010-03-29 23:29:31 -0700991 if (remove_sta)
992 sta_info_destroy_addr(sdata, bssid);
Tomas Winkleraa458d12008-09-09 00:32:12 +0300993}
Jiri Bencf0706e82007-05-05 11:45:53 -0700994
Kalle Valo3cf335d2009-03-22 21:57:06 +0200995void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
996 struct ieee80211_hdr *hdr)
997{
998 /*
999 * We can postpone the mgd.timer whenever receiving unicast frames
1000 * from AP because we know that the connection is working both ways
1001 * at that time. But multicast frames (and hence also beacons) must
1002 * be ignored here, because we need to trigger the timer during
Johannes Bergb291ba12009-07-10 15:29:03 +02001003 * data idle periods for sending the periodic probe request to the
1004 * AP we're connected to.
Kalle Valo3cf335d2009-03-22 21:57:06 +02001005 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001006 if (is_multicast_ether_addr(hdr->addr1))
1007 return;
1008
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001009 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1010 return;
1011
Johannes Bergb291ba12009-07-10 15:29:03 +02001012 mod_timer(&sdata->u.mgd.conn_mon_timer,
1013 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
Kalle Valo3cf335d2009-03-22 21:57:06 +02001014}
Jiri Bencf0706e82007-05-05 11:45:53 -07001015
Maxim Levitskya43abf22009-07-31 18:54:12 +03001016static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1017{
1018 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1019 const u8 *ssid;
1020
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001021 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
1022 ieee80211_send_probe_req(sdata, ifmgd->associated->bssid,
Maxim Levitskya43abf22009-07-31 18:54:12 +03001023 ssid + 2, ssid[1], NULL, 0);
1024
1025 ifmgd->probe_send_count++;
1026 ifmgd->probe_timeout = jiffies + IEEE80211_PROBE_WAIT;
1027 run_again(ifmgd, ifmgd->probe_timeout);
1028}
1029
Johannes Bergb291ba12009-07-10 15:29:03 +02001030static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1031 bool beacon)
Kalle Valo04de8382009-03-22 21:57:35 +02001032{
Kalle Valo04de8382009-03-22 21:57:35 +02001033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +02001034 bool already = false;
Johannes Berg34bfc412009-05-12 19:58:12 +02001035
Johannes Berg9607e6b2009-12-23 13:15:31 +01001036 if (!ieee80211_sdata_running(sdata))
Johannes Berg0e2b6282009-07-13 13:23:39 +02001037 return;
1038
Luis R. Rodriguez91a3bd72009-07-23 16:37:47 -07001039 if (sdata->local->scanning)
1040 return;
1041
Johannes Bergb8bc4b02009-12-23 13:15:42 +01001042 if (sdata->local->tmp_channel)
1043 return;
1044
Johannes Berg77fdaa12009-07-07 03:45:17 +02001045 mutex_lock(&ifmgd->mtx);
1046
1047 if (!ifmgd->associated)
1048 goto out;
1049
Michael Buescha8604022009-04-15 14:41:22 -04001050#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergb291ba12009-07-10 15:29:03 +02001051 if (beacon && net_ratelimit())
1052 printk(KERN_DEBUG "%s: detected beacon loss from AP "
Johannes Berg47846c92009-11-25 17:46:19 +01001053 "- sending probe request\n", sdata->name);
Michael Buescha8604022009-04-15 14:41:22 -04001054#endif
Kalle Valo04de8382009-03-22 21:57:35 +02001055
Johannes Bergb291ba12009-07-10 15:29:03 +02001056 /*
1057 * The driver/our work has already reported this event or the
1058 * connection monitoring has kicked in and we have already sent
1059 * a probe request. Or maybe the AP died and the driver keeps
1060 * reporting until we disassociate...
1061 *
1062 * In either case we have to ignore the current call to this
1063 * function (except for setting the correct probe reason bit)
1064 * because otherwise we would reset the timer every time and
1065 * never check whether we received a probe response!
1066 */
1067 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1068 IEEE80211_STA_CONNECTION_POLL))
1069 already = true;
1070
1071 if (beacon)
1072 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1073 else
1074 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1075
1076 if (already)
1077 goto out;
1078
Johannes Berg4e751842009-06-10 15:16:52 +02001079 mutex_lock(&sdata->local->iflist_mtx);
1080 ieee80211_recalc_ps(sdata->local, -1);
1081 mutex_unlock(&sdata->local->iflist_mtx);
1082
Maxim Levitskya43abf22009-07-31 18:54:12 +03001083 ifmgd->probe_send_count = 0;
1084 ieee80211_mgd_probe_ap_send(sdata);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001085 out:
1086 mutex_unlock(&ifmgd->mtx);
Kalle Valo04de8382009-03-22 21:57:35 +02001087}
1088
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001089static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
1090{
1091 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1092 struct ieee80211_local *local = sdata->local;
1093 u8 bssid[ETH_ALEN];
1094
1095 mutex_lock(&ifmgd->mtx);
1096 if (!ifmgd->associated) {
1097 mutex_unlock(&ifmgd->mtx);
1098 return;
1099 }
1100
1101 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
1102
1103 printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
1104
Jouni Malinene69e95d2010-03-29 23:29:31 -07001105 ieee80211_set_disassoc(sdata, true);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001106 ieee80211_recalc_idle(local);
1107 mutex_unlock(&ifmgd->mtx);
1108 /*
1109 * must be outside lock due to cfg80211,
1110 * but that's not a problem.
1111 */
1112 ieee80211_send_deauth_disassoc(sdata, bssid,
1113 IEEE80211_STYPE_DEAUTH,
1114 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
Jouni Malinend5cdfac2010-04-04 09:37:19 +03001115 NULL, true);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001116}
1117
1118void ieee80211_beacon_connection_loss_work(struct work_struct *work)
Johannes Bergb291ba12009-07-10 15:29:03 +02001119{
1120 struct ieee80211_sub_if_data *sdata =
1121 container_of(work, struct ieee80211_sub_if_data,
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001122 u.mgd.beacon_connection_loss_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02001123
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001124 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1125 __ieee80211_connection_loss(sdata);
1126 else
1127 ieee80211_mgd_probe_ap(sdata, true);
Johannes Bergb291ba12009-07-10 15:29:03 +02001128}
1129
Kalle Valo04de8382009-03-22 21:57:35 +02001130void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1131{
1132 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001133 struct ieee80211_hw *hw = &sdata->local->hw;
Kalle Valo04de8382009-03-22 21:57:35 +02001134
Johannes Bergb5878a22010-04-07 16:48:40 +02001135 trace_api_beacon_loss(sdata);
1136
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001137 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1138 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
Kalle Valo04de8382009-03-22 21:57:35 +02001139}
1140EXPORT_SYMBOL(ieee80211_beacon_loss);
1141
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001142void ieee80211_connection_loss(struct ieee80211_vif *vif)
1143{
1144 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1145 struct ieee80211_hw *hw = &sdata->local->hw;
1146
Johannes Bergb5878a22010-04-07 16:48:40 +02001147 trace_api_connection_loss(sdata);
1148
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001149 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1150 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1151}
1152EXPORT_SYMBOL(ieee80211_connection_loss);
1153
1154
Johannes Berg77fdaa12009-07-07 03:45:17 +02001155static enum rx_mgmt_action __must_check
1156ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001157 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001158{
Johannes Berg46900292009-02-15 12:44:28 +01001159 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001160 const u8 *bssid = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07001161 u16 reason_code;
1162
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001163 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001164 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001165
Johannes Berg77fdaa12009-07-07 03:45:17 +02001166 ASSERT_MGD_MTX(ifmgd);
1167
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001168 bssid = ifmgd->associated->bssid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001169
1170 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
1171
Johannes Berg77fdaa12009-07-07 03:45:17 +02001172 printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01001173 sdata->name, bssid, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001174
Jouni Malinene69e95d2010-03-29 23:29:31 -07001175 ieee80211_set_disassoc(sdata, true);
Johannes Berg63f170e2009-12-23 13:15:33 +01001176 ieee80211_recalc_idle(sdata->local);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001177
1178 return RX_MGMT_CFG80211_DEAUTH;
Jiri Bencf0706e82007-05-05 11:45:53 -07001179}
1180
1181
Johannes Berg77fdaa12009-07-07 03:45:17 +02001182static enum rx_mgmt_action __must_check
1183ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
1184 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001185{
Johannes Berg46900292009-02-15 12:44:28 +01001186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001187 u16 reason_code;
1188
Johannes Bergf4ea83d2008-06-30 15:10:46 +02001189 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001190 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001191
Johannes Berg77fdaa12009-07-07 03:45:17 +02001192 ASSERT_MGD_MTX(ifmgd);
1193
1194 if (WARN_ON(!ifmgd->associated))
1195 return RX_MGMT_NONE;
1196
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001197 if (WARN_ON(memcmp(ifmgd->associated->bssid, mgmt->sa, ETH_ALEN)))
Johannes Berg77fdaa12009-07-07 03:45:17 +02001198 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001199
1200 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
1201
Johannes Berg0ff71612009-09-26 14:45:41 +02001202 printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01001203 sdata->name, mgmt->sa, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07001204
Jouni Malinene69e95d2010-03-29 23:29:31 -07001205 ieee80211_set_disassoc(sdata, true);
Johannes Bergbc83b682009-11-29 12:19:06 +01001206 ieee80211_recalc_idle(sdata->local);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001207 return RX_MGMT_CFG80211_DISASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -07001208}
1209
1210
Johannes Bergaf6b6372009-12-23 13:15:35 +01001211static bool ieee80211_assoc_success(struct ieee80211_work *wk,
1212 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07001213{
Johannes Bergaf6b6372009-12-23 13:15:35 +01001214 struct ieee80211_sub_if_data *sdata = wk->sdata;
Johannes Berg46900292009-02-15 12:44:28 +01001215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001216 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01001217 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07001218 struct sta_info *sta;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001219 struct cfg80211_bss *cbss = wk->assoc.bss;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001220 u8 *pos;
Johannes Berg881d9482009-01-21 15:13:48 +01001221 u32 rates, basic_rates;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001222 u16 capab_info, aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001223 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02001224 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Bergae5eb022008-10-14 16:58:37 +02001225 u32 changed = 0;
Johannes Berg5d1ec852009-12-02 12:43:43 +01001226 int i, j, err;
1227 bool have_higher_than_11mbit = false;
Johannes Bergae5eb022008-10-14 16:58:37 +02001228 u16 ap_ht_cap_flags;
Jiri Bencf0706e82007-05-05 11:45:53 -07001229
Johannes Bergaf6b6372009-12-23 13:15:35 +01001230 /* AssocResp and ReassocResp have identical structure */
Jiri Bencf0706e82007-05-05 11:45:53 -07001231
Jiri Bencf0706e82007-05-05 11:45:53 -07001232 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001233 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
Jiri Bencf0706e82007-05-05 11:45:53 -07001234
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001235 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1236 printk(KERN_DEBUG "%s: invalid aid value %d; bits 15:14 not "
Johannes Berg47846c92009-11-25 17:46:19 +01001237 "set\n", sdata->name, aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02001238 aid &= ~(BIT(15) | BIT(14));
1239
Johannes Bergaf6b6372009-12-23 13:15:35 +01001240 pos = mgmt->u.assoc_resp.variable;
1241 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1242
Jiri Bencf0706e82007-05-05 11:45:53 -07001243 if (!elems.supp_rates) {
1244 printk(KERN_DEBUG "%s: no SuppRates element in AssocResp\n",
Johannes Berg47846c92009-11-25 17:46:19 +01001245 sdata->name);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001246 return false;
Jiri Bencf0706e82007-05-05 11:45:53 -07001247 }
1248
Johannes Berg46900292009-02-15 12:44:28 +01001249 ifmgd->aid = aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07001250
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001251 sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
Jiri Bencf0706e82007-05-05 11:45:53 -07001252 if (!sta) {
Johannes Berg5d1ec852009-12-02 12:43:43 +01001253 printk(KERN_DEBUG "%s: failed to alloc STA entry for"
1254 " the AP\n", sdata->name);
Johannes Bergaf6b6372009-12-23 13:15:35 +01001255 return false;
Jiri Bencf0706e82007-05-05 11:45:53 -07001256 }
1257
Johannes Berg5d1ec852009-12-02 12:43:43 +01001258 set_sta_flags(sta, WLAN_STA_AUTH | WLAN_STA_ASSOC |
1259 WLAN_STA_ASSOC_AP);
1260 if (!(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
1261 set_sta_flags(sta, WLAN_STA_AUTHORIZED);
1262
Jiri Bencf0706e82007-05-05 11:45:53 -07001263 rates = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01001264 basic_rates = 0;
1265 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1266
Jiri Bencf0706e82007-05-05 11:45:53 -07001267 for (i = 0; i < elems.supp_rates_len; i++) {
1268 int rate = (elems.supp_rates[i] & 0x7f) * 5;
Tomas Winklerd61272c2008-10-30 17:08:08 +02001269 bool is_basic = !!(elems.supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001270
1271 if (rate > 110)
1272 have_higher_than_11mbit = true;
1273
1274 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001275 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001276 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001277 if (is_basic)
1278 basic_rates |= BIT(j);
1279 break;
1280 }
Johannes Berg8318d782008-01-24 19:38:38 +01001281 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001282 }
Johannes Berg8318d782008-01-24 19:38:38 +01001283
Jiri Bencf0706e82007-05-05 11:45:53 -07001284 for (i = 0; i < elems.ext_supp_rates_len; i++) {
1285 int rate = (elems.ext_supp_rates[i] & 0x7f) * 5;
Johannes Berg7e0986c2009-04-19 13:22:11 +02001286 bool is_basic = !!(elems.ext_supp_rates[i] & 0x80);
Johannes Berg8318d782008-01-24 19:38:38 +01001287
1288 if (rate > 110)
1289 have_higher_than_11mbit = true;
1290
1291 for (j = 0; j < sband->n_bitrates; j++) {
Tomas Winklerd61272c2008-10-30 17:08:08 +02001292 if (sband->bitrates[j].bitrate == rate) {
Jiri Bencf0706e82007-05-05 11:45:53 -07001293 rates |= BIT(j);
Tomas Winklerd61272c2008-10-30 17:08:08 +02001294 if (is_basic)
1295 basic_rates |= BIT(j);
1296 break;
1297 }
Johannes Berg8318d782008-01-24 19:38:38 +01001298 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001299 }
Johannes Berg8318d782008-01-24 19:38:38 +01001300
Johannes Berg323ce792008-09-11 02:45:11 +02001301 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
Johannes Bergbda39332008-10-11 01:51:51 +02001302 sdata->vif.bss_conf.basic_rates = basic_rates;
Johannes Berg8318d782008-01-24 19:38:38 +01001303
1304 /* cf. IEEE 802.11 9.2.12 */
1305 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
1306 have_higher_than_11mbit)
1307 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1308 else
1309 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001310
Johannes Bergab1faea2009-07-01 21:41:17 +02001311 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001312 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02001313 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02001314
1315 ap_ht_cap_flags = sta->sta.ht_cap.cap;
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001316
Johannes Berg4b7679a2008-09-18 18:14:18 +02001317 rate_control_rate_init(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07001318
Johannes Berg46900292009-02-15 12:44:28 +01001319 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
Jouni Malinen5394af42009-01-08 13:31:59 +02001320 set_sta_flags(sta, WLAN_STA_MFP);
1321
Johannes Bergddf4ac52008-10-22 11:41:38 +02001322 if (elems.wmm_param)
Johannes Berg07346f812008-05-03 01:02:02 +02001323 set_sta_flags(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02001324
Johannes Berg5d1ec852009-12-02 12:43:43 +01001325 err = sta_info_insert(sta);
1326 sta = NULL;
1327 if (err) {
1328 printk(KERN_DEBUG "%s: failed to insert STA entry for"
1329 " the AP (error %d)\n", sdata->name, err);
Johannes Berg90be5612010-01-08 19:01:07 +01001330 return false;
Johannes Bergddf4ac52008-10-22 11:41:38 +02001331 }
1332
Johannes Bergddf4ac52008-10-22 11:41:38 +02001333 if (elems.wmm_param)
Johannes Berg4ced3f72010-07-19 16:39:04 +02001334 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07001335 elems.wmm_param_len);
Johannes Bergaa837e12009-05-07 16:16:24 +02001336 else
1337 ieee80211_set_wmm_default(sdata);
Jiri Bencf0706e82007-05-05 11:45:53 -07001338
Johannes Berge4da8c32009-12-23 13:15:43 +01001339 local->oper_channel = wk->chan;
1340
Johannes Bergae5eb022008-10-14 16:58:37 +02001341 if (elems.ht_info_elem && elems.wmm_param &&
Johannes Bergaf6b6372009-12-23 13:15:35 +01001342 (sdata->local->hw.queues >= 4) &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001343 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N))
Johannes Bergae5eb022008-10-14 16:58:37 +02001344 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001345 cbss->bssid, ap_ht_cap_flags);
Johannes Bergae5eb022008-10-14 16:58:37 +02001346
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001347 /* set AID and assoc capability,
1348 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01001349 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001350 bss_conf->assoc_capability = capab_info;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001351 ieee80211_set_associated(sdata, cbss, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001352
Kalle Valo15b7b062009-03-22 21:57:14 +02001353 /*
Felix Fietkaud5242152010-01-08 18:06:26 +01001354 * If we're using 4-addr mode, let the AP know that we're
1355 * doing so, so that it can create the STA VLAN on its side
1356 */
1357 if (ifmgd->use_4addr)
1358 ieee80211_send_4addr_nullfunc(local, sdata);
1359
1360 /*
Johannes Bergb291ba12009-07-10 15:29:03 +02001361 * Start timer to probe the connection to the AP now.
1362 * Also start the timer that will detect beacon loss.
Kalle Valo15b7b062009-03-22 21:57:14 +02001363 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001364 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
1365 mod_beacon_timer(sdata);
Kalle Valo15b7b062009-03-22 21:57:14 +02001366
Johannes Bergaf6b6372009-12-23 13:15:35 +01001367 return true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001368}
1369
1370
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001371static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001372 struct ieee80211_mgmt *mgmt,
1373 size_t len,
1374 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001375 struct ieee802_11_elems *elems,
1376 bool beacon)
Jiri Bencf0706e82007-05-05 11:45:53 -07001377{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001378 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001379 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02001380 struct ieee80211_bss *bss;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01001381 struct ieee80211_channel *channel;
Johannes Berg56007a02010-01-26 14:19:52 +01001382 bool need_ps = false;
1383
1384 if (sdata->u.mgd.associated) {
1385 bss = (void *)sdata->u.mgd.associated->priv;
1386 /* not previously set so we may need to recalc */
1387 need_ps = !bss->dtim_period;
1388 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001389
Johannes Berg5bda6172008-09-08 11:05:10 +02001390 if (elems->ds_params && elems->ds_params_len == 1)
1391 freq = ieee80211_channel_to_frequency(elems->ds_params[0]);
1392 else
1393 freq = rx_status->freq;
1394
1395 channel = ieee80211_get_channel(local->hw.wiphy, freq);
1396
1397 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
1398 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001399
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001400 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
Johannes Berg2a519312009-02-10 21:25:55 +01001401 channel, beacon);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001402 if (bss)
1403 ieee80211_rx_bss_put(local, bss);
1404
1405 if (!sdata->u.mgd.associated)
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001406 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001407
Johannes Berg56007a02010-01-26 14:19:52 +01001408 if (need_ps) {
1409 mutex_lock(&local->iflist_mtx);
1410 ieee80211_recalc_ps(local, -1);
1411 mutex_unlock(&local->iflist_mtx);
1412 }
1413
Sujithc481ec92009-01-06 09:28:37 +05301414 if (elems->ch_switch_elem && (elems->ch_switch_elem_len == 3) &&
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001415 (memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001416 ETH_ALEN) == 0)) {
Sujithc481ec92009-01-06 09:28:37 +05301417 struct ieee80211_channel_sw_ie *sw_elem =
1418 (struct ieee80211_channel_sw_ie *)elems->ch_switch_elem;
Johannes Berg5ce6e432010-05-11 16:20:57 +02001419 ieee80211_sta_process_chanswitch(sdata, sw_elem,
1420 bss, rx_status->mactime);
Sujithc481ec92009-01-06 09:28:37 +05301421 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001422}
1423
1424
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001425static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Johannes Bergaf6b6372009-12-23 13:15:35 +01001426 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001427{
Johannes Bergaf6b6372009-12-23 13:15:35 +01001428 struct ieee80211_mgmt *mgmt = (void *)skb->data;
Kalle Valo15b7b062009-03-22 21:57:14 +02001429 struct ieee80211_if_managed *ifmgd;
Johannes Bergaf6b6372009-12-23 13:15:35 +01001430 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
1431 size_t baselen, len = skb->len;
Ester Kummerae6a44e2008-06-27 18:54:48 +03001432 struct ieee802_11_elems elems;
1433
Kalle Valo15b7b062009-03-22 21:57:14 +02001434 ifmgd = &sdata->u.mgd;
1435
Johannes Berg77fdaa12009-07-07 03:45:17 +02001436 ASSERT_MGD_MTX(ifmgd);
1437
Johannes Berg47846c92009-11-25 17:46:19 +01001438 if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03001439 return; /* ignore ProbeResp to foreign address */
1440
Ester Kummerae6a44e2008-06-27 18:54:48 +03001441 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
1442 if (baselen > len)
1443 return;
1444
1445 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
1446 &elems);
1447
Johannes Berg98c8fcc2008-09-08 17:44:26 +02001448 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03001449
Johannes Berg77fdaa12009-07-07 03:45:17 +02001450 if (ifmgd->associated &&
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001451 memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0 &&
Johannes Bergb291ba12009-07-10 15:29:03 +02001452 ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1453 IEEE80211_STA_CONNECTION_POLL)) {
1454 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1455 IEEE80211_STA_BEACON_POLL);
Johannes Berg4e751842009-06-10 15:16:52 +02001456 mutex_lock(&sdata->local->iflist_mtx);
1457 ieee80211_recalc_ps(sdata->local, -1);
1458 mutex_unlock(&sdata->local->iflist_mtx);
Juuso Oikarinen7bdfcaa2010-04-20 13:15:56 +03001459
1460 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1461 return;
1462
Johannes Bergb291ba12009-07-10 15:29:03 +02001463 /*
1464 * We've received a probe response, but are not sure whether
1465 * we have or will be receiving any beacons or data, so let's
1466 * schedule the timers again, just in case.
1467 */
1468 mod_beacon_timer(sdata);
Juuso Oikarinen7bdfcaa2010-04-20 13:15:56 +03001469
Johannes Bergb291ba12009-07-10 15:29:03 +02001470 mod_timer(&ifmgd->conn_mon_timer,
1471 round_jiffies_up(jiffies +
1472 IEEE80211_CONNECTION_IDLE_TIME));
Johannes Berg4e751842009-06-10 15:16:52 +02001473 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001474}
1475
Johannes Bergd91f36d2009-04-16 13:17:26 +02001476/*
1477 * This is the canonical list of information elements we care about,
1478 * the filter code also gives us all changes to the Microsoft OUI
1479 * (00:50:F2) vendor IE which is used for WMM which we need to track.
1480 *
1481 * We implement beacon filtering in software since that means we can
1482 * avoid processing the frame here and in cfg80211, and userspace
1483 * will not be able to tell whether the hardware supports it or not.
1484 *
1485 * XXX: This list needs to be dynamic -- userspace needs to be able to
1486 * add items it requires. It also needs to be able to tell us to
1487 * look out for other vendor IEs.
1488 */
1489static const u64 care_about_ies =
Johannes Berg1d4df3a2009-04-22 11:25:43 +02001490 (1ULL << WLAN_EID_COUNTRY) |
1491 (1ULL << WLAN_EID_ERP_INFO) |
1492 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
1493 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
1494 (1ULL << WLAN_EID_HT_CAPABILITY) |
1495 (1ULL << WLAN_EID_HT_INFORMATION);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001496
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001497static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001498 struct ieee80211_mgmt *mgmt,
1499 size_t len,
1500 struct ieee80211_rx_status *rx_status)
1501{
Johannes Bergd91f36d2009-04-16 13:17:26 +02001502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jouni Malinen17e4ec12010-03-29 23:28:30 -07001503 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Bencf0706e82007-05-05 11:45:53 -07001504 size_t baselen;
1505 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001506 struct ieee80211_local *local = sdata->local;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001507 u32 changed = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001508 bool erp_valid, directed_tim = false;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001509 u8 erp_value = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02001510 u32 ncrc;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001511 u8 *bssid;
1512
1513 ASSERT_MGD_MTX(ifmgd);
Jiri Bencf0706e82007-05-05 11:45:53 -07001514
Ester Kummerae6a44e2008-06-27 18:54:48 +03001515 /* Process beacon from the current BSS */
1516 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1517 if (baselen > len)
1518 return;
1519
Johannes Bergd91f36d2009-04-16 13:17:26 +02001520 if (rx_status->freq != local->hw.conf.channel->center_freq)
Jiri Bencf0706e82007-05-05 11:45:53 -07001521 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07001522
Johannes Bergb291ba12009-07-10 15:29:03 +02001523 /*
1524 * We might have received a number of frames, among them a
1525 * disassoc frame and a beacon...
1526 */
1527 if (!ifmgd->associated)
Johannes Berg77fdaa12009-07-07 03:45:17 +02001528 return;
1529
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001530 bssid = ifmgd->associated->bssid;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001531
Johannes Bergb291ba12009-07-10 15:29:03 +02001532 /*
1533 * And in theory even frames from a different AP we were just
1534 * associated to a split-second ago!
1535 */
1536 if (memcmp(bssid, mgmt->bssid, ETH_ALEN) != 0)
Jiri Bencf0706e82007-05-05 11:45:53 -07001537 return;
1538
Jouni Malinen17e4ec12010-03-29 23:28:30 -07001539 /* Track average RSSI from the Beacon frames of the current AP */
1540 ifmgd->last_beacon_signal = rx_status->signal;
1541 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
1542 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
1543 ifmgd->ave_beacon_signal = rx_status->signal;
1544 ifmgd->last_cqm_event_signal = 0;
1545 } else {
1546 ifmgd->ave_beacon_signal =
1547 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
1548 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
1549 ifmgd->ave_beacon_signal) / 16;
1550 }
1551 if (bss_conf->cqm_rssi_thold &&
1552 !(local->hw.flags & IEEE80211_HW_SUPPORTS_CQM_RSSI)) {
1553 int sig = ifmgd->ave_beacon_signal / 16;
1554 int last_event = ifmgd->last_cqm_event_signal;
1555 int thold = bss_conf->cqm_rssi_thold;
1556 int hyst = bss_conf->cqm_rssi_hyst;
1557 if (sig < thold &&
1558 (last_event == 0 || sig < last_event - hyst)) {
1559 ifmgd->last_cqm_event_signal = sig;
1560 ieee80211_cqm_rssi_notify(
1561 &sdata->vif,
1562 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
1563 GFP_KERNEL);
1564 } else if (sig > thold &&
1565 (last_event == 0 || sig > last_event + hyst)) {
1566 ifmgd->last_cqm_event_signal = sig;
1567 ieee80211_cqm_rssi_notify(
1568 &sdata->vif,
1569 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
1570 GFP_KERNEL);
1571 }
1572 }
1573
Johannes Bergb291ba12009-07-10 15:29:03 +02001574 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
Jouni Malinen92778182009-05-14 21:15:36 +03001575#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1576 if (net_ratelimit()) {
1577 printk(KERN_DEBUG "%s: cancelling probereq poll due "
Johannes Berg47846c92009-11-25 17:46:19 +01001578 "to a received beacon\n", sdata->name);
Jouni Malinen92778182009-05-14 21:15:36 +03001579 }
1580#endif
Johannes Bergb291ba12009-07-10 15:29:03 +02001581 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
Johannes Berg4e751842009-06-10 15:16:52 +02001582 mutex_lock(&local->iflist_mtx);
1583 ieee80211_recalc_ps(local, -1);
1584 mutex_unlock(&local->iflist_mtx);
Jouni Malinen92778182009-05-14 21:15:36 +03001585 }
1586
Johannes Bergb291ba12009-07-10 15:29:03 +02001587 /*
1588 * Push the beacon loss detection into the future since
1589 * we are processing a beacon from the AP just now.
1590 */
1591 mod_beacon_timer(sdata);
1592
Johannes Bergd91f36d2009-04-16 13:17:26 +02001593 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
1594 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
1595 len - baselen, &elems,
1596 care_about_ies, ncrc);
1597
1598 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
Johannes Berge7ec86f2009-04-18 17:33:24 +02001599 directed_tim = ieee80211_check_tim(elems.tim, elems.tim_len,
1600 ifmgd->aid);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001601
Jouni Malinen30196672009-05-19 17:01:43 +03001602 if (ncrc != ifmgd->beacon_crc) {
1603 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
1604 true);
Johannes Bergd91f36d2009-04-16 13:17:26 +02001605
Johannes Berg4ced3f72010-07-19 16:39:04 +02001606 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
Jouni Malinen30196672009-05-19 17:01:43 +03001607 elems.wmm_param_len);
1608 }
Johannes Bergfe3fa822008-09-08 11:05:09 +02001609
Vivek Natarajan25c9c872009-03-02 20:20:30 +05301610 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
Kalle Valo1fb36062009-02-10 17:09:24 +02001611 if (directed_tim) {
Kalle Valo572e0012009-02-10 17:09:31 +02001612 if (local->hw.conf.dynamic_ps_timeout > 0) {
1613 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1614 ieee80211_hw_config(local,
1615 IEEE80211_CONF_CHANGE_PS);
1616 ieee80211_send_nullfunc(local, sdata, 0);
1617 } else {
1618 local->pspolling = true;
1619
1620 /*
1621 * Here is assumed that the driver will be
1622 * able to send ps-poll frame and receive a
1623 * response even though power save mode is
1624 * enabled, but some drivers might require
1625 * to disable power save here. This needs
1626 * to be investigated.
1627 */
1628 ieee80211_send_pspoll(local, sdata);
1629 }
Vivek Natarajana97b77b2008-12-23 18:39:02 -08001630 }
1631 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001632
Jouni Malinen30196672009-05-19 17:01:43 +03001633 if (ncrc == ifmgd->beacon_crc)
1634 return;
1635 ifmgd->beacon_crc = ncrc;
1636
Johannes Berg7a5158e2008-10-08 10:59:33 +02001637 if (elems.erp_info && elems.erp_info_len >= 1) {
1638 erp_valid = true;
1639 erp_value = elems.erp_info[0];
1640 } else {
1641 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04001642 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02001643 changed |= ieee80211_handle_bss_capability(sdata,
1644 le16_to_cpu(mgmt->u.beacon.capab_info),
1645 erp_valid, erp_value);
Jiri Bencf0706e82007-05-05 11:45:53 -07001646
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001647
Vasanthakumar Thiagarajan53d6f81c2009-02-11 22:18:49 +05301648 if (elems.ht_cap_elem && elems.ht_info_elem && elems.wmm_param &&
Johannes Bergab1faea2009-07-01 21:41:17 +02001649 !(ifmgd->flags & IEEE80211_STA_DISABLE_11N)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001650 struct sta_info *sta;
1651 struct ieee80211_supported_band *sband;
1652 u16 ap_ht_cap_flags;
1653
1654 rcu_read_lock();
1655
Johannes Bergabe60632009-11-25 17:46:18 +01001656 sta = sta_info_get(sdata, bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001657 if (WARN_ON(!sta)) {
Johannes Bergae5eb022008-10-14 16:58:37 +02001658 rcu_read_unlock();
1659 return;
1660 }
1661
1662 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1663
1664 ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
1665 elems.ht_cap_elem, &sta->sta.ht_cap);
1666
1667 ap_ht_cap_flags = sta->sta.ht_cap.cap;
1668
1669 rcu_read_unlock();
1670
1671 changed |= ieee80211_enable_ht(sdata, elems.ht_info_elem,
Johannes Berg77fdaa12009-07-07 03:45:17 +02001672 bssid, ap_ht_cap_flags);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02001673 }
1674
Luis R. Rodriguez8b19e6c2009-07-30 17:38:09 -07001675 /* Note: country IE parsing is done for us by cfg80211 */
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001676 if (elems.country_elem) {
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301677 /* TODO: IBSS also needs this */
1678 if (elems.pwr_constr_elem)
1679 ieee80211_handle_pwr_constr(sdata,
1680 le16_to_cpu(mgmt->u.probe_resp.capab_info),
1681 elems.pwr_constr_elem,
1682 elems.pwr_constr_elem_len);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08001683 }
1684
Johannes Berg471b3ef2007-12-28 14:32:58 +01001685 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07001686}
1687
Johannes Berg1fa57d02010-06-10 10:21:32 +02001688void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1689 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07001690{
Johannes Berg77fdaa12009-07-07 03:45:17 +02001691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001692 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07001693 struct ieee80211_mgmt *mgmt;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001694 enum rx_mgmt_action rma = RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07001695 u16 fc;
1696
Jiri Bencf0706e82007-05-05 11:45:53 -07001697 rx_status = (struct ieee80211_rx_status *) skb->cb;
1698 mgmt = (struct ieee80211_mgmt *) skb->data;
1699 fc = le16_to_cpu(mgmt->frame_control);
1700
Johannes Berg77fdaa12009-07-07 03:45:17 +02001701 mutex_lock(&ifmgd->mtx);
1702
1703 if (ifmgd->associated &&
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001704 memcmp(ifmgd->associated->bssid, mgmt->bssid, ETH_ALEN) == 0) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02001705 switch (fc & IEEE80211_FCTL_STYPE) {
1706 case IEEE80211_STYPE_BEACON:
1707 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
1708 rx_status);
1709 break;
1710 case IEEE80211_STYPE_PROBE_RESP:
Johannes Bergaf6b6372009-12-23 13:15:35 +01001711 ieee80211_rx_mgmt_probe_resp(sdata, skb);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001712 break;
1713 case IEEE80211_STYPE_DEAUTH:
Johannes Berg63f170e2009-12-23 13:15:33 +01001714 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001715 break;
1716 case IEEE80211_STYPE_DISASSOC:
1717 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
1718 break;
1719 case IEEE80211_STYPE_ACTION:
Johannes Berg8b9a4e62010-05-28 15:22:58 +02001720 switch (mgmt->u.action.category) {
Johannes Berg8b9a4e62010-05-28 15:22:58 +02001721 case WLAN_CATEGORY_SPECTRUM_MGMT:
1722 ieee80211_sta_process_chanswitch(sdata,
1723 &mgmt->u.action.u.chan_switch.sw_elem,
1724 (void *)ifmgd->associated->priv,
1725 rx_status->mactime);
1726 break;
1727 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02001728 }
1729 mutex_unlock(&ifmgd->mtx);
1730
1731 switch (rma) {
1732 case RX_MGMT_NONE:
1733 /* no action */
1734 break;
1735 case RX_MGMT_CFG80211_DEAUTH:
Holger Schurigce470612009-10-13 13:28:13 +02001736 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001737 break;
1738 case RX_MGMT_CFG80211_DISASSOC:
Holger Schurigce470612009-10-13 13:28:13 +02001739 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001740 break;
1741 default:
1742 WARN(1, "unexpected: %d", rma);
1743 }
Johannes Berg36b3a622010-06-10 10:21:33 +02001744 return;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001745 }
1746
Johannes Berg77fdaa12009-07-07 03:45:17 +02001747 mutex_unlock(&ifmgd->mtx);
1748
Johannes Berg63f170e2009-12-23 13:15:33 +01001749 if (skb->len >= 24 + 2 /* mgmt + deauth reason */ &&
Johannes Bergb054b742010-06-07 21:50:07 +02001750 (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_DEAUTH) {
1751 struct ieee80211_local *local = sdata->local;
1752 struct ieee80211_work *wk;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001753
Johannes Bergb054b742010-06-07 21:50:07 +02001754 mutex_lock(&local->work_mtx);
1755 list_for_each_entry(wk, &local->work_list, list) {
1756 if (wk->sdata != sdata)
1757 continue;
1758
Johannes Berge5b900d2010-07-29 16:08:55 +02001759 if (wk->type != IEEE80211_WORK_ASSOC &&
1760 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
Johannes Bergb054b742010-06-07 21:50:07 +02001761 continue;
1762
1763 if (memcmp(mgmt->bssid, wk->filter_ta, ETH_ALEN))
1764 continue;
1765 if (memcmp(mgmt->sa, wk->filter_ta, ETH_ALEN))
1766 continue;
1767
1768 /*
1769 * Printing the message only here means we can't
1770 * spuriously print it, but it also means that it
1771 * won't be printed when the frame comes in before
1772 * we even tried to associate or in similar cases.
1773 *
1774 * Ultimately, I suspect cfg80211 should print the
1775 * messages instead.
1776 */
1777 printk(KERN_DEBUG
1778 "%s: deauthenticated from %pM (Reason: %u)\n",
1779 sdata->name, mgmt->bssid,
1780 le16_to_cpu(mgmt->u.deauth.reason_code));
1781
1782 list_del_rcu(&wk->list);
1783 free_work(wk);
1784 break;
1785 }
1786 mutex_unlock(&local->work_mtx);
1787
Johannes Berg77fdaa12009-07-07 03:45:17 +02001788 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Bergb054b742010-06-07 21:50:07 +02001789 }
Jiri Bencf0706e82007-05-05 11:45:53 -07001790}
1791
Johannes Berg9c6bd792008-09-11 00:01:52 +02001792static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e82007-05-05 11:45:53 -07001793{
1794 struct ieee80211_sub_if_data *sdata =
1795 (struct ieee80211_sub_if_data *) data;
Johannes Berg46900292009-02-15 12:44:28 +01001796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001797 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07001798
Johannes Berg5bb644a2009-05-17 11:40:42 +02001799 if (local->quiescing) {
1800 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1801 return;
1802 }
1803
Johannes Berg64592c82010-06-10 10:21:31 +02001804 ieee80211_queue_work(&local->hw, &sdata->work);
Jiri Bencf0706e82007-05-05 11:45:53 -07001805}
1806
Johannes Berg1fa57d02010-06-10 10:21:32 +02001807void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
Johannes Berg60f8b392008-09-08 17:44:22 +02001808{
Johannes Berg60f8b392008-09-08 17:44:22 +02001809 struct ieee80211_local *local = sdata->local;
Johannes Berg1fa57d02010-06-10 10:21:32 +02001810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02001811
Johannes Berg77fdaa12009-07-07 03:45:17 +02001812 /* then process the rest of the work */
1813 mutex_lock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02001814
Johannes Bergb291ba12009-07-10 15:29:03 +02001815 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1816 IEEE80211_STA_CONNECTION_POLL) &&
1817 ifmgd->associated) {
Maxim Levitskya43abf22009-07-31 18:54:12 +03001818 u8 bssid[ETH_ALEN];
1819
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001820 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
Johannes Bergb291ba12009-07-10 15:29:03 +02001821 if (time_is_after_jiffies(ifmgd->probe_timeout))
1822 run_again(ifmgd, ifmgd->probe_timeout);
Maxim Levitskya43abf22009-07-31 18:54:12 +03001823
1824 else if (ifmgd->probe_send_count < IEEE80211_MAX_PROBE_TRIES) {
1825#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1826 printk(KERN_DEBUG "No probe response from AP %pM"
1827 " after %dms, try %d\n", bssid,
1828 (1000 * IEEE80211_PROBE_WAIT)/HZ,
1829 ifmgd->probe_send_count);
1830#endif
1831 ieee80211_mgd_probe_ap_send(sdata);
1832 } else {
Johannes Bergb291ba12009-07-10 15:29:03 +02001833 /*
1834 * We actually lost the connection ... or did we?
1835 * Let's make sure!
1836 */
1837 ifmgd->flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1838 IEEE80211_STA_BEACON_POLL);
Johannes Bergb291ba12009-07-10 15:29:03 +02001839 printk(KERN_DEBUG "No probe response from AP %pM"
1840 " after %dms, disconnecting.\n",
1841 bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
Jouni Malinene69e95d2010-03-29 23:29:31 -07001842 ieee80211_set_disassoc(sdata, true);
Johannes Bergbc83b682009-11-29 12:19:06 +01001843 ieee80211_recalc_idle(local);
Johannes Bergb291ba12009-07-10 15:29:03 +02001844 mutex_unlock(&ifmgd->mtx);
1845 /*
1846 * must be outside lock due to cfg80211,
1847 * but that's not a problem.
1848 */
1849 ieee80211_send_deauth_disassoc(sdata, bssid,
1850 IEEE80211_STYPE_DEAUTH,
1851 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
Jouni Malinend5cdfac2010-04-04 09:37:19 +03001852 NULL, true);
Johannes Bergb291ba12009-07-10 15:29:03 +02001853 mutex_lock(&ifmgd->mtx);
1854 }
1855 }
1856
Johannes Berg77fdaa12009-07-07 03:45:17 +02001857 mutex_unlock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02001858}
Johannes Berg0a51b272008-09-08 17:44:25 +02001859
Johannes Bergb291ba12009-07-10 15:29:03 +02001860static void ieee80211_sta_bcn_mon_timer(unsigned long data)
1861{
1862 struct ieee80211_sub_if_data *sdata =
1863 (struct ieee80211_sub_if_data *) data;
1864 struct ieee80211_local *local = sdata->local;
1865
1866 if (local->quiescing)
1867 return;
1868
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001869 ieee80211_queue_work(&sdata->local->hw,
1870 &sdata->u.mgd.beacon_connection_loss_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02001871}
1872
1873static void ieee80211_sta_conn_mon_timer(unsigned long data)
1874{
1875 struct ieee80211_sub_if_data *sdata =
1876 (struct ieee80211_sub_if_data *) data;
1877 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1878 struct ieee80211_local *local = sdata->local;
1879
1880 if (local->quiescing)
1881 return;
1882
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001883 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02001884}
1885
1886static void ieee80211_sta_monitor_work(struct work_struct *work)
1887{
1888 struct ieee80211_sub_if_data *sdata =
1889 container_of(work, struct ieee80211_sub_if_data,
1890 u.mgd.monitor_work);
1891
1892 ieee80211_mgd_probe_ap(sdata, false);
1893}
1894
Johannes Berga1678f82008-09-11 00:01:47 +02001895static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
1896{
Kalle Vaload935682009-04-19 08:47:19 +03001897 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
Johannes Bergb291ba12009-07-10 15:29:03 +02001898 sdata->u.mgd.flags &= ~(IEEE80211_STA_BEACON_POLL |
1899 IEEE80211_STA_CONNECTION_POLL);
Kalle Vaload935682009-04-19 08:47:19 +03001900
Johannes Bergb291ba12009-07-10 15:29:03 +02001901 /* let's probe the connection once */
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001902 ieee80211_queue_work(&sdata->local->hw,
Johannes Bergb291ba12009-07-10 15:29:03 +02001903 &sdata->u.mgd.monitor_work);
1904 /* and do all the other regular work too */
Johannes Berg64592c82010-06-10 10:21:31 +02001905 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
Kalle Vaload935682009-04-19 08:47:19 +03001906 }
Johannes Berga1678f82008-09-11 00:01:47 +02001907}
1908
Johannes Berg5bb644a2009-05-17 11:40:42 +02001909#ifdef CONFIG_PM
1910void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
1911{
1912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1913
1914 /*
1915 * we need to use atomic bitops for the running bits
1916 * only because both timers might fire at the same
1917 * time -- the code here is properly synchronised.
1918 */
1919
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001920 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001921 if (del_timer_sync(&ifmgd->timer))
1922 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
1923
1924 cancel_work_sync(&ifmgd->chswitch_work);
1925 if (del_timer_sync(&ifmgd->chswitch_timer))
1926 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
Johannes Bergb291ba12009-07-10 15:29:03 +02001927
1928 cancel_work_sync(&ifmgd->monitor_work);
1929 /* these will just be re-established on connection */
1930 del_timer_sync(&ifmgd->conn_mon_timer);
1931 del_timer_sync(&ifmgd->bcn_mon_timer);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001932}
1933
1934void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
1935{
1936 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1937
1938 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
1939 add_timer(&ifmgd->timer);
1940 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
1941 add_timer(&ifmgd->chswitch_timer);
1942}
1943#endif
1944
Johannes Berg9c6bd792008-09-11 00:01:52 +02001945/* interface setup */
1946void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
1947{
Johannes Berg46900292009-02-15 12:44:28 +01001948 struct ieee80211_if_managed *ifmgd;
Johannes Berg9c6bd792008-09-11 00:01:52 +02001949
Johannes Berg46900292009-02-15 12:44:28 +01001950 ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +02001951 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
Johannes Berg46900292009-02-15 12:44:28 +01001952 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001953 INIT_WORK(&ifmgd->beacon_connection_loss_work,
1954 ieee80211_beacon_connection_loss_work);
Johannes Berg46900292009-02-15 12:44:28 +01001955 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
Johannes Berg9c6bd792008-09-11 00:01:52 +02001956 (unsigned long) sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02001957 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
1958 (unsigned long) sdata);
1959 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
1960 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01001961 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
Sujithc481ec92009-01-06 09:28:37 +05301962 (unsigned long) sdata);
Johannes Berg9c6bd792008-09-11 00:01:52 +02001963
Johannes Bergab1faea2009-07-01 21:41:17 +02001964 ifmgd->flags = 0;
Johannes Bergbbbdff92009-04-16 13:27:42 +02001965
Johannes Berg77fdaa12009-07-07 03:45:17 +02001966 mutex_init(&ifmgd->mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001967
1968 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
1969 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
1970 else
1971 ifmgd->req_smps = IEEE80211_SMPS_OFF;
Johannes Berg9c6bd792008-09-11 00:01:52 +02001972}
1973
1974/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02001975void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
1976{
1977 struct ieee80211_sub_if_data *sdata = local->scan_sdata;
Johannes Berga1678f82008-09-11 00:01:47 +02001978
1979 /* Restart STA timers */
1980 rcu_read_lock();
1981 list_for_each_entry_rcu(sdata, &local->interfaces, list)
1982 ieee80211_restart_sta_timer(sdata);
1983 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02001984}
Johannes Berg10f644a2009-04-16 13:17:25 +02001985
1986int ieee80211_max_network_latency(struct notifier_block *nb,
1987 unsigned long data, void *dummy)
1988{
1989 s32 latency_usec = (s32) data;
1990 struct ieee80211_local *local =
1991 container_of(nb, struct ieee80211_local,
1992 network_latency_notifier);
1993
1994 mutex_lock(&local->iflist_mtx);
1995 ieee80211_recalc_ps(local, latency_usec);
1996 mutex_unlock(&local->iflist_mtx);
1997
1998 return 0;
1999}
Johannes Berg77fdaa12009-07-07 03:45:17 +02002000
2001/* config hooks */
Johannes Bergaf6b6372009-12-23 13:15:35 +01002002static enum work_done_result
2003ieee80211_probe_auth_done(struct ieee80211_work *wk,
2004 struct sk_buff *skb)
2005{
2006 if (!skb) {
2007 cfg80211_send_auth_timeout(wk->sdata->dev, wk->filter_ta);
2008 return WORK_DONE_DESTROY;
2009 }
2010
2011 if (wk->type == IEEE80211_WORK_AUTH) {
2012 cfg80211_send_rx_auth(wk->sdata->dev, skb->data, skb->len);
2013 return WORK_DONE_DESTROY;
2014 }
2015
2016 mutex_lock(&wk->sdata->u.mgd.mtx);
2017 ieee80211_rx_mgmt_probe_resp(wk->sdata, skb);
2018 mutex_unlock(&wk->sdata->u.mgd.mtx);
2019
2020 wk->type = IEEE80211_WORK_AUTH;
2021 wk->probe_auth.tries = 0;
2022 return WORK_DONE_REQUEUE;
2023}
2024
Johannes Berg77fdaa12009-07-07 03:45:17 +02002025int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
2026 struct cfg80211_auth_request *req)
2027{
Johannes Berg77fdaa12009-07-07 03:45:17 +02002028 const u8 *ssid;
Johannes Bergf679f652009-12-23 13:15:34 +01002029 struct ieee80211_work *wk;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002030 u16 auth_alg;
2031
Jouni Malinend5cdfac2010-04-04 09:37:19 +03002032 if (req->local_state_change)
2033 return 0; /* no need to update mac80211 state */
2034
Johannes Berg77fdaa12009-07-07 03:45:17 +02002035 switch (req->auth_type) {
2036 case NL80211_AUTHTYPE_OPEN_SYSTEM:
2037 auth_alg = WLAN_AUTH_OPEN;
2038 break;
2039 case NL80211_AUTHTYPE_SHARED_KEY:
Johannes Berg9dca9c42010-07-21 10:09:25 +02002040 if (IS_ERR(sdata->local->wep_tx_tfm))
2041 return -EOPNOTSUPP;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002042 auth_alg = WLAN_AUTH_SHARED_KEY;
2043 break;
2044 case NL80211_AUTHTYPE_FT:
2045 auth_alg = WLAN_AUTH_FT;
2046 break;
2047 case NL80211_AUTHTYPE_NETWORK_EAP:
2048 auth_alg = WLAN_AUTH_LEAP;
2049 break;
2050 default:
2051 return -EOPNOTSUPP;
2052 }
2053
2054 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
2055 if (!wk)
2056 return -ENOMEM;
2057
Joe Perches5e124bd2010-01-08 22:33:38 -08002058 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002059
2060 if (req->ie && req->ie_len) {
2061 memcpy(wk->ie, req->ie, req->ie_len);
2062 wk->ie_len = req->ie_len;
2063 }
2064
Johannes Bergfffd0932009-07-08 14:22:54 +02002065 if (req->key && req->key_len) {
Johannes Bergaf6b6372009-12-23 13:15:35 +01002066 wk->probe_auth.key_len = req->key_len;
2067 wk->probe_auth.key_idx = req->key_idx;
2068 memcpy(wk->probe_auth.key, req->key, req->key_len);
Johannes Bergfffd0932009-07-08 14:22:54 +02002069 }
2070
Johannes Berg77fdaa12009-07-07 03:45:17 +02002071 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002072 memcpy(wk->probe_auth.ssid, ssid + 2, ssid[1]);
2073 wk->probe_auth.ssid_len = ssid[1];
Johannes Berg77fdaa12009-07-07 03:45:17 +02002074
Johannes Bergaf6b6372009-12-23 13:15:35 +01002075 wk->probe_auth.algorithm = auth_alg;
2076 wk->probe_auth.privacy = req->bss->capability & WLAN_CAPABILITY_PRIVACY;
Johannes Bergf679f652009-12-23 13:15:34 +01002077
Johannes Berg070bb542010-02-03 13:57:46 +01002078 /* if we already have a probe, don't probe again */
2079 if (req->bss->proberesp_ies)
2080 wk->type = IEEE80211_WORK_AUTH;
2081 else
2082 wk->type = IEEE80211_WORK_DIRECT_PROBE;
Johannes Bergf679f652009-12-23 13:15:34 +01002083 wk->chan = req->bss->channel;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002084 wk->sdata = sdata;
2085 wk->done = ieee80211_probe_auth_done;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002086
Johannes Bergaf6b6372009-12-23 13:15:35 +01002087 ieee80211_add_work(wk);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002088 return 0;
2089}
2090
Johannes Bergaf6b6372009-12-23 13:15:35 +01002091static enum work_done_result ieee80211_assoc_done(struct ieee80211_work *wk,
2092 struct sk_buff *skb)
2093{
2094 struct ieee80211_mgmt *mgmt;
Johannes Berge5b900d2010-07-29 16:08:55 +02002095 struct ieee80211_rx_status *rx_status;
2096 struct ieee802_11_elems elems;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002097 u16 status;
2098
2099 if (!skb) {
2100 cfg80211_send_assoc_timeout(wk->sdata->dev, wk->filter_ta);
2101 return WORK_DONE_DESTROY;
2102 }
2103
Johannes Berge5b900d2010-07-29 16:08:55 +02002104 if (wk->type == IEEE80211_WORK_ASSOC_BEACON_WAIT) {
2105 mutex_lock(&wk->sdata->u.mgd.mtx);
2106 rx_status = (void *) skb->cb;
2107 ieee802_11_parse_elems(skb->data + 24 + 12, skb->len - 24 - 12, &elems);
2108 ieee80211_rx_bss_info(wk->sdata, (void *)skb->data, skb->len, rx_status,
2109 &elems, true);
2110 mutex_unlock(&wk->sdata->u.mgd.mtx);
2111
2112 wk->type = IEEE80211_WORK_ASSOC;
2113 /* not really done yet */
2114 return WORK_DONE_REQUEUE;
2115 }
2116
Johannes Bergaf6b6372009-12-23 13:15:35 +01002117 mgmt = (void *)skb->data;
2118 status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2119
2120 if (status == WLAN_STATUS_SUCCESS) {
2121 mutex_lock(&wk->sdata->u.mgd.mtx);
2122 if (!ieee80211_assoc_success(wk, mgmt, skb->len)) {
2123 mutex_unlock(&wk->sdata->u.mgd.mtx);
2124 /* oops -- internal error -- send timeout for now */
2125 cfg80211_send_assoc_timeout(wk->sdata->dev,
2126 wk->filter_ta);
2127 return WORK_DONE_DESTROY;
2128 }
Juuso Oikarinen68542962010-06-09 13:43:26 +03002129
2130 mutex_unlock(&wk->sdata->u.mgd.mtx);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002131 }
2132
2133 cfg80211_send_rx_assoc(wk->sdata->dev, skb->data, skb->len);
2134 return WORK_DONE_DESTROY;
2135}
2136
Johannes Berg77fdaa12009-07-07 03:45:17 +02002137int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
2138 struct cfg80211_assoc_request *req)
2139{
2140 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002141 struct ieee80211_bss *bss = (void *)req->bss->priv;
Johannes Bergf679f652009-12-23 13:15:34 +01002142 struct ieee80211_work *wk;
Johannes Berg63f170e2009-12-23 13:15:33 +01002143 const u8 *ssid;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002144 int i;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002145
2146 mutex_lock(&ifmgd->mtx);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002147 if (ifmgd->associated) {
Jouni Malinen9c87ba62010-02-28 12:13:46 +02002148 if (!req->prev_bssid ||
2149 memcmp(req->prev_bssid, ifmgd->associated->bssid,
2150 ETH_ALEN)) {
2151 /*
2152 * We are already associated and the request was not a
2153 * reassociation request from the current BSS, so
2154 * reject it.
2155 */
2156 mutex_unlock(&ifmgd->mtx);
2157 return -EALREADY;
2158 }
2159
2160 /* Trying to reassociate - clear previous association state */
Jouni Malinene69e95d2010-03-29 23:29:31 -07002161 ieee80211_set_disassoc(sdata, true);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002162 }
2163 mutex_unlock(&ifmgd->mtx);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002164
Johannes Berg63f170e2009-12-23 13:15:33 +01002165 wk = kzalloc(sizeof(*wk) + req->ie_len, GFP_KERNEL);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002166 if (!wk)
2167 return -ENOMEM;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002168
Johannes Berg77fdaa12009-07-07 03:45:17 +02002169 ifmgd->flags &= ~IEEE80211_STA_DISABLE_11N;
Vivek Natarajan375177b2010-02-09 14:50:28 +05302170 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002171
2172 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
2173 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
2174 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
2175 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
2176 ifmgd->flags |= IEEE80211_STA_DISABLE_11N;
2177
Johannes Berg77fdaa12009-07-07 03:45:17 +02002178
2179 if (req->ie && req->ie_len) {
2180 memcpy(wk->ie, req->ie, req->ie_len);
2181 wk->ie_len = req->ie_len;
2182 } else
2183 wk->ie_len = 0;
2184
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002185 wk->assoc.bss = req->bss;
Johannes Bergf679f652009-12-23 13:15:34 +01002186
Johannes Bergaf6b6372009-12-23 13:15:35 +01002187 memcpy(wk->filter_ta, req->bss->bssid, ETH_ALEN);
Johannes Bergf679f652009-12-23 13:15:34 +01002188
Johannes Bergaf6b6372009-12-23 13:15:35 +01002189 /* new association always uses requested smps mode */
2190 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
2191 if (ifmgd->powersave)
2192 ifmgd->ap_smps = IEEE80211_SMPS_DYNAMIC;
2193 else
2194 ifmgd->ap_smps = IEEE80211_SMPS_OFF;
2195 } else
2196 ifmgd->ap_smps = ifmgd->req_smps;
2197
2198 wk->assoc.smps = ifmgd->ap_smps;
Johannes Berg77c81442009-12-23 13:15:37 +01002199 /*
2200 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
2201 * We still associate in non-HT mode (11a/b/g) if any one of these
2202 * ciphers is configured as pairwise.
2203 * We can set this to true for non-11n hardware, that'll be checked
2204 * separately along with the peer capabilities.
2205 */
Johannes Bergaf6b6372009-12-23 13:15:35 +01002206 wk->assoc.use_11n = !(ifmgd->flags & IEEE80211_STA_DISABLE_11N);
Johannes Bergf679f652009-12-23 13:15:34 +01002207 wk->assoc.capability = req->bss->capability;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002208 wk->assoc.wmm_used = bss->wmm_used;
2209 wk->assoc.supp_rates = bss->supp_rates;
2210 wk->assoc.supp_rates_len = bss->supp_rates_len;
Johannes Bergf679f652009-12-23 13:15:34 +01002211 wk->assoc.ht_information_ie =
2212 ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_INFORMATION);
Johannes Berg63f170e2009-12-23 13:15:33 +01002213
Kalle Valoab133152010-01-12 10:42:31 +02002214 if (bss->wmm_used && bss->uapsd_supported &&
2215 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
2216 wk->assoc.uapsd_used = true;
2217 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
2218 } else {
2219 wk->assoc.uapsd_used = false;
2220 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
2221 }
2222
Johannes Berg63f170e2009-12-23 13:15:33 +01002223 ssid = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
Johannes Bergf679f652009-12-23 13:15:34 +01002224 memcpy(wk->assoc.ssid, ssid + 2, ssid[1]);
2225 wk->assoc.ssid_len = ssid[1];
Johannes Berg63f170e2009-12-23 13:15:33 +01002226
Johannes Berg77fdaa12009-07-07 03:45:17 +02002227 if (req->prev_bssid)
Johannes Bergf679f652009-12-23 13:15:34 +01002228 memcpy(wk->assoc.prev_bssid, req->prev_bssid, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002229
Johannes Bergf679f652009-12-23 13:15:34 +01002230 wk->chan = req->bss->channel;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002231 wk->sdata = sdata;
2232 wk->done = ieee80211_assoc_done;
Johannes Berge5b900d2010-07-29 16:08:55 +02002233 if (!bss->dtim_period &&
2234 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
2235 wk->type = IEEE80211_WORK_ASSOC_BEACON_WAIT;
2236 else
2237 wk->type = IEEE80211_WORK_ASSOC;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002238
2239 if (req->use_mfp) {
2240 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
2241 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
2242 } else {
2243 ifmgd->mfp = IEEE80211_MFP_DISABLED;
2244 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
2245 }
2246
2247 if (req->crypto.control_port)
2248 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
2249 else
2250 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
2251
Johannes Bergaf6b6372009-12-23 13:15:35 +01002252 ieee80211_add_work(wk);
2253 return 0;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002254}
2255
2256int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503d2009-07-07 03:56:11 +02002257 struct cfg80211_deauth_request *req,
2258 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002259{
Johannes Bergaf6b6372009-12-23 13:15:35 +01002260 struct ieee80211_local *local = sdata->local;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002261 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergf679f652009-12-23 13:15:34 +01002262 struct ieee80211_work *wk;
Jouni Malinen05e48e82010-06-14 11:55:56 -07002263 u8 bssid[ETH_ALEN];
2264 bool assoc_bss = false;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002265
Johannes Berg77fdaa12009-07-07 03:45:17 +02002266 mutex_lock(&ifmgd->mtx);
2267
Jouni Malinen05e48e82010-06-14 11:55:56 -07002268 memcpy(bssid, req->bss->bssid, ETH_ALEN);
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002269 if (ifmgd->associated == req->bss) {
Jouni Malinen05e48e82010-06-14 11:55:56 -07002270 ieee80211_set_disassoc(sdata, false);
Johannes Berga58ce432009-11-19 12:45:42 +01002271 mutex_unlock(&ifmgd->mtx);
Jouni Malinen05e48e82010-06-14 11:55:56 -07002272 assoc_bss = true;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002273 } else {
2274 bool not_auth_yet = false;
Johannes Berga58ce432009-11-19 12:45:42 +01002275
Johannes Bergaf6b6372009-12-23 13:15:35 +01002276 mutex_unlock(&ifmgd->mtx);
2277
2278 mutex_lock(&local->work_mtx);
2279 list_for_each_entry(wk, &local->work_list, list) {
Johannes Berg29165e42010-02-06 15:20:13 +01002280 if (wk->sdata != sdata)
Johannes Bergaf6b6372009-12-23 13:15:35 +01002281 continue;
Johannes Berg29165e42010-02-06 15:20:13 +01002282
2283 if (wk->type != IEEE80211_WORK_DIRECT_PROBE &&
Reinette Chatre79733a82010-05-04 16:04:49 -07002284 wk->type != IEEE80211_WORK_AUTH &&
Johannes Berge5b900d2010-07-29 16:08:55 +02002285 wk->type != IEEE80211_WORK_ASSOC &&
2286 wk->type != IEEE80211_WORK_ASSOC_BEACON_WAIT)
Johannes Berg29165e42010-02-06 15:20:13 +01002287 continue;
2288
Johannes Bergaf6b6372009-12-23 13:15:35 +01002289 if (memcmp(req->bss->bssid, wk->filter_ta, ETH_ALEN))
2290 continue;
Johannes Berg29165e42010-02-06 15:20:13 +01002291
2292 not_auth_yet = wk->type == IEEE80211_WORK_DIRECT_PROBE;
2293 list_del_rcu(&wk->list);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002294 free_work(wk);
2295 break;
2296 }
2297 mutex_unlock(&local->work_mtx);
2298
2299 /*
2300 * If somebody requests authentication and we haven't
2301 * sent out an auth frame yet there's no need to send
2302 * out a deauth frame either. If the state was PROBE,
2303 * then this is the case. If it's AUTH we have sent a
2304 * frame, and if it's IDLE we have completed the auth
2305 * process already.
2306 */
2307 if (not_auth_yet) {
2308 __cfg80211_auth_canceled(sdata->dev, bssid);
2309 return 0;
2310 }
2311 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02002312
Johannes Berg0ff71612009-09-26 14:45:41 +02002313 printk(KERN_DEBUG "%s: deauthenticating from %pM by local choice (reason=%d)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01002314 sdata->name, bssid, req->reason_code);
Johannes Berg0ff71612009-09-26 14:45:41 +02002315
Jouni Malinend5cdfac2010-04-04 09:37:19 +03002316 ieee80211_send_deauth_disassoc(sdata, bssid, IEEE80211_STYPE_DEAUTH,
2317 req->reason_code, cookie,
2318 !req->local_state_change);
Jouni Malinen05e48e82010-06-14 11:55:56 -07002319 if (assoc_bss)
2320 sta_info_destroy_addr(sdata, bssid);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002321
Johannes Bergbc83b682009-11-29 12:19:06 +01002322 ieee80211_recalc_idle(sdata->local);
2323
Johannes Berg77fdaa12009-07-07 03:45:17 +02002324 return 0;
2325}
2326
2327int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg667503d2009-07-07 03:56:11 +02002328 struct cfg80211_disassoc_request *req,
2329 void *cookie)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002330{
2331 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jouni Malinene69e95d2010-03-29 23:29:31 -07002332 u8 bssid[ETH_ALEN];
Johannes Berg77fdaa12009-07-07 03:45:17 +02002333
Johannes Berg77fdaa12009-07-07 03:45:17 +02002334 mutex_lock(&ifmgd->mtx);
2335
Johannes Berg8d8b2612009-07-25 11:58:36 +02002336 /*
2337 * cfg80211 should catch this ... but it's racy since
2338 * we can receive a disassoc frame, process it, hand it
2339 * to cfg80211 while that's in a locked section already
2340 * trying to tell us that the user wants to disconnect.
2341 */
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002342 if (ifmgd->associated != req->bss) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02002343 mutex_unlock(&ifmgd->mtx);
2344 return -ENOLINK;
2345 }
2346
Johannes Berg0ff71612009-09-26 14:45:41 +02002347 printk(KERN_DEBUG "%s: disassociating from %pM by local choice (reason=%d)\n",
Johannes Berg47846c92009-11-25 17:46:19 +01002348 sdata->name, req->bss->bssid, req->reason_code);
Johannes Berg0ff71612009-09-26 14:45:41 +02002349
Jouni Malinene69e95d2010-03-29 23:29:31 -07002350 memcpy(bssid, req->bss->bssid, ETH_ALEN);
2351 ieee80211_set_disassoc(sdata, false);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002352
2353 mutex_unlock(&ifmgd->mtx);
2354
2355 ieee80211_send_deauth_disassoc(sdata, req->bss->bssid,
Johannes Berg667503d2009-07-07 03:56:11 +02002356 IEEE80211_STYPE_DISASSOC, req->reason_code,
Jouni Malinend5cdfac2010-04-04 09:37:19 +03002357 cookie, !req->local_state_change);
Jouni Malinene69e95d2010-03-29 23:29:31 -07002358 sta_info_destroy_addr(sdata, bssid);
Johannes Bergbc83b682009-11-29 12:19:06 +01002359
2360 ieee80211_recalc_idle(sdata->local);
2361
Johannes Berg77fdaa12009-07-07 03:45:17 +02002362 return 0;
2363}
Jouni Malinen026331c2010-02-15 12:53:10 +02002364
Juuso Oikarinena97c13c2010-03-23 09:02:34 +02002365void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
2366 enum nl80211_cqm_rssi_threshold_event rssi_event,
2367 gfp_t gfp)
2368{
2369 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2370
Johannes Bergb5878a22010-04-07 16:48:40 +02002371 trace_api_cqm_rssi_notify(sdata, rssi_event);
2372
Juuso Oikarinena97c13c2010-03-23 09:02:34 +02002373 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
2374}
2375EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);