blob: 09556303c7e191ebda9a19b78147752cc6838d64 [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>
Paul Gortmakerd9b93842011-09-18 13:21:27 -040019#include <linux/moduleparam.h>
Johannes Bergd0709a62008-02-25 16:27:46 +010020#include <linux/rtnetlink.h>
Jean Pihete8db0be2011-08-25 15:35:03 +020021#include <linux/pm_qos.h>
Johannes Bergd91f36d2009-04-16 13:17:26 +020022#include <linux/crc32.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040024#include <linux/export.h>
Jiri Bencf0706e82007-05-05 11:45:53 -070025#include <net/mac80211.h>
Johannes Berg472dbc42008-09-11 00:01:49 +020026#include <asm/unaligned.h>
Johannes Berg60f8b392008-09-08 17:44:22 +020027
Jiri Bencf0706e82007-05-05 11:45:53 -070028#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020029#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040030#include "rate.h"
31#include "led.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070032
Johannes Berg66e67e42012-01-20 13:55:27 +010033#define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34#define IEEE80211_AUTH_MAX_TRIES 3
35#define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
36#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
37#define IEEE80211_ASSOC_MAX_TRIES 3
38
Ben Greear180205b2011-02-04 15:30:24 -080039static int max_nullfunc_tries = 2;
40module_param(max_nullfunc_tries, int, 0644);
41MODULE_PARM_DESC(max_nullfunc_tries,
42 "Maximum nullfunc tx tries before disconnecting (reason 4).");
43
44static int max_probe_tries = 5;
45module_param(max_probe_tries, int, 0644);
46MODULE_PARM_DESC(max_probe_tries,
47 "Maximum probe tries before disconnecting (reason 4).");
Johannes Bergb291ba12009-07-10 15:29:03 +020048
49/*
Felix Fietkau7ccc8bd2010-11-19 22:55:38 +010050 * Beacon loss timeout is calculated as N frames times the
51 * advertised beacon interval. This may need to be somewhat
52 * higher than what hardware might detect to account for
53 * delays in the host processing frames. But since we also
54 * probe on beacon miss before declaring the connection lost
55 * default to what we want.
Johannes Bergb291ba12009-07-10 15:29:03 +020056 */
Felix Fietkau7ccc8bd2010-11-19 22:55:38 +010057#define IEEE80211_BEACON_LOSS_COUNT 7
58
Johannes Bergb291ba12009-07-10 15:29:03 +020059/*
60 * Time the connection can be idle before we probe
61 * it to see if we can still talk to the AP.
62 */
Maxim Levitskyd1c50912009-07-31 18:54:23 +030063#define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
Johannes Bergb291ba12009-07-10 15:29:03 +020064/*
65 * Time we wait for a probe response after sending
66 * a probe request because of beacon loss or for
67 * checking the connection still works.
68 */
Ben Greear180205b2011-02-04 15:30:24 -080069static int probe_wait_ms = 500;
70module_param(probe_wait_ms, int, 0644);
71MODULE_PARM_DESC(probe_wait_ms,
72 "Maximum time(ms) to wait for probe response"
73 " before disconnecting (reason 4).");
Jiri Bencf0706e82007-05-05 11:45:53 -070074
Jouni Malinen17e4ec12010-03-29 23:28:30 -070075/*
76 * Weight given to the latest Beacon frame when calculating average signal
77 * strength for Beacon frames received in the current BSS. This must be
78 * between 1 and 15.
79 */
80#define IEEE80211_SIGNAL_AVE_WEIGHT 3
81
Jouni Malinen391a2002010-08-27 22:22:00 +030082/*
83 * How many Beacon frames need to have been used in average signal strength
84 * before starting to indicate signal change events.
85 */
86#define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
87
Johannes Berg5bb644a2009-05-17 11:40:42 +020088#define TMR_RUNNING_TIMER 0
89#define TMR_RUNNING_CHANSW 1
90
Johannes Berg77fdaa12009-07-07 03:45:17 +020091/*
92 * All cfg80211 functions have to be called outside a locked
93 * section so that they can acquire a lock themselves... This
94 * is much simpler than queuing up things in cfg80211, but we
95 * do need some indirection for that here.
96 */
97enum rx_mgmt_action {
98 /* no action required */
99 RX_MGMT_NONE,
100
Johannes Berg77fdaa12009-07-07 03:45:17 +0200101 /* caller must call cfg80211_send_deauth() */
102 RX_MGMT_CFG80211_DEAUTH,
103
104 /* caller must call cfg80211_send_disassoc() */
105 RX_MGMT_CFG80211_DISASSOC,
Johannes Berg66e67e42012-01-20 13:55:27 +0100106
107 /* caller must call cfg80211_send_rx_auth() */
108 RX_MGMT_CFG80211_RX_AUTH,
109
110 /* caller must call cfg80211_send_rx_assoc() */
111 RX_MGMT_CFG80211_RX_ASSOC,
112
113 /* caller must call cfg80211_send_assoc_timeout() */
114 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
Johannes Berg77fdaa12009-07-07 03:45:17 +0200115};
116
Johannes Berg5484e232008-09-08 17:44:27 +0200117/* utils */
Johannes Berg77fdaa12009-07-07 03:45:17 +0200118static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
119{
Johannes Berg46a5eba2010-09-15 13:28:15 +0200120 lockdep_assert_held(&ifmgd->mtx);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200121}
122
Johannes Bergca386f32009-07-10 02:39:48 +0200123/*
124 * We can have multiple work items (and connection probing)
125 * scheduling this timer, but we need to take care to only
126 * reschedule it when it should fire _earlier_ than it was
127 * asked for before, or if it's not pending right now. This
128 * function ensures that. Note that it then is required to
129 * run this function for all timeouts after the first one
130 * has happened -- the work that runs from this timer will
131 * do that.
132 */
Johannes Berg66e67e42012-01-20 13:55:27 +0100133static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
Johannes Bergca386f32009-07-10 02:39:48 +0200134{
135 ASSERT_MGD_MTX(ifmgd);
136
137 if (!timer_pending(&ifmgd->timer) ||
138 time_before(timeout, ifmgd->timer.expires))
139 mod_timer(&ifmgd->timer, timeout);
140}
141
Luis R. Rodriguezd3a910a2010-09-16 15:12:32 -0400142void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
Johannes Bergb291ba12009-07-10 15:29:03 +0200143{
Johannes Bergc1288b12012-01-19 09:29:57 +0100144 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
Johannes Bergb291ba12009-07-10 15:29:03 +0200145 return;
146
Johannes Berg7eeff742012-07-18 10:27:27 +0200147 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
148 return;
149
Johannes Bergb291ba12009-07-10 15:29:03 +0200150 mod_timer(&sdata->u.mgd.bcn_mon_timer,
Felix Fietkau7ccc8bd2010-11-19 22:55:38 +0100151 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
Johannes Bergb291ba12009-07-10 15:29:03 +0200152}
153
Luis R. Rodriguezbe099e82010-09-16 15:12:29 -0400154void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
155{
Luis R. Rodriguez0c699c32010-09-16 15:12:30 -0400156 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
157
Stanislaw Gruszka86281722011-02-25 14:46:02 +0100158 if (unlikely(!sdata->u.mgd.associated))
159 return;
160
Luis R. Rodriguezbe099e82010-09-16 15:12:29 -0400161 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
162 return;
163
164 mod_timer(&sdata->u.mgd.conn_mon_timer,
165 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
Luis R. Rodriguez0c699c32010-09-16 15:12:30 -0400166
167 ifmgd->probe_send_count = 0;
Luis R. Rodriguezbe099e82010-09-16 15:12:29 -0400168}
169
Johannes Berg5484e232008-09-08 17:44:27 +0200170static int ecw2cw(int ecw)
Johannes Berg60f8b392008-09-08 17:44:22 +0200171{
Johannes Berg5484e232008-09-08 17:44:27 +0200172 return (1 << ecw) - 1;
Johannes Berg60f8b392008-09-08 17:44:22 +0200173}
174
Johannes Berg24398e32012-03-28 10:58:36 +0200175static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
176 struct ieee80211_ht_operation *ht_oper,
177 const u8 *bssid, bool reconfig)
Johannes Bergd5522e02009-03-30 13:23:35 +0200178{
179 struct ieee80211_local *local = sdata->local;
180 struct ieee80211_supported_band *sband;
Johannes Berg55de9082012-07-26 17:24:39 +0200181 struct ieee80211_chanctx_conf *chanctx_conf;
182 struct ieee80211_channel *chan;
Johannes Bergd5522e02009-03-30 13:23:35 +0200183 struct sta_info *sta;
184 u32 changed = 0;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200185 u16 ht_opmode;
Johannes Berg64f68e52012-03-28 10:58:37 +0200186 bool disable_40 = false;
Johannes Bergd5522e02009-03-30 13:23:35 +0200187
Johannes Berg55de9082012-07-26 17:24:39 +0200188 rcu_read_lock();
189 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
190 if (WARN_ON(!chanctx_conf)) {
191 rcu_read_unlock();
192 return 0;
193 }
Johannes Berg4bf88532012-11-09 11:39:59 +0100194 chan = chanctx_conf->def.chan;
Johannes Berg55de9082012-07-26 17:24:39 +0200195 rcu_read_unlock();
196 sband = local->hw.wiphy->bands[chan->band];
Johannes Berg0aaffa92010-05-05 15:28:27 +0200197
Johannes Berg4bf88532012-11-09 11:39:59 +0100198 switch (sdata->vif.bss_conf.chandef.width) {
199 case NL80211_CHAN_WIDTH_40:
200 if (sdata->vif.bss_conf.chandef.chan->center_freq >
201 sdata->vif.bss_conf.chandef.center_freq1 &&
202 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
Johannes Berg64f68e52012-03-28 10:58:37 +0200203 disable_40 = true;
Johannes Berg4bf88532012-11-09 11:39:59 +0100204 if (sdata->vif.bss_conf.chandef.chan->center_freq <
205 sdata->vif.bss_conf.chandef.center_freq1 &&
206 chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
Johannes Berg64f68e52012-03-28 10:58:37 +0200207 disable_40 = true;
208 break;
209 default:
210 break;
211 }
Johannes Bergd5522e02009-03-30 13:23:35 +0200212
Johannes Berg24398e32012-03-28 10:58:36 +0200213 /* This can change during the lifetime of the BSS */
214 if (!(ht_oper->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY))
Johannes Berg64f68e52012-03-28 10:58:37 +0200215 disable_40 = true;
Johannes Bergd5522e02009-03-30 13:23:35 +0200216
Johannes Berg64f68e52012-03-28 10:58:37 +0200217 mutex_lock(&local->sta_mtx);
218 sta = sta_info_get(sdata, bssid);
219
220 WARN_ON_ONCE(!sta);
221
222 if (sta && !sta->supports_40mhz)
223 disable_40 = true;
224
225 if (sta && (!reconfig ||
Rajkumar Manoharan91a00992012-04-25 20:24:24 +0530226 (disable_40 != !(sta->sta.ht_cap.cap &
Johannes Berg64f68e52012-03-28 10:58:37 +0200227 IEEE80211_HT_CAP_SUP_WIDTH_20_40)))) {
Rajkumar Manoharan7cc44ed2011-09-16 15:32:34 +0530228
Johannes Berg64f68e52012-03-28 10:58:37 +0200229 if (disable_40)
230 sta->sta.ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
231 else
232 sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
Rajkumar Manoharan7cc44ed2011-09-16 15:32:34 +0530233
Johannes Berg64f68e52012-03-28 10:58:37 +0200234 rate_control_rate_update(local, sband, sta,
Johannes Berg8f727ef2012-03-30 08:43:32 +0200235 IEEE80211_RC_BW_CHANGED);
Johannes Berg0aaffa92010-05-05 15:28:27 +0200236 }
Johannes Berg64f68e52012-03-28 10:58:37 +0200237 mutex_unlock(&local->sta_mtx);
Johannes Bergd5522e02009-03-30 13:23:35 +0200238
Johannes Berg074d46d2012-03-15 19:45:16 +0100239 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
Johannes Bergd5522e02009-03-30 13:23:35 +0200240
241 /* if bss configuration changed store the new one */
Johannes Berg24398e32012-03-28 10:58:36 +0200242 if (!reconfig || (sdata->vif.bss_conf.ht_operation_mode != ht_opmode)) {
Johannes Bergd5522e02009-03-30 13:23:35 +0200243 changed |= BSS_CHANGED_HT;
Johannes Berg9ed6bcc2009-05-08 20:47:39 +0200244 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
Johannes Bergd5522e02009-03-30 13:23:35 +0200245 }
246
247 return changed;
248}
249
Johannes Berg9c6bd792008-09-11 00:01:52 +0200250/* frame sending functions */
251
Johannes Berg66e67e42012-01-20 13:55:27 +0100252static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
253 struct ieee80211_supported_band *sband,
254 u32 *rates)
255{
256 int i, j, count;
257 *rates = 0;
258 count = 0;
259 for (i = 0; i < supp_rates_len; i++) {
260 int rate = (supp_rates[i] & 0x7F) * 5;
261
262 for (j = 0; j < sband->n_bitrates; j++)
263 if (sband->bitrates[j].bitrate == rate) {
264 *rates |= BIT(j);
265 count++;
266 break;
267 }
268 }
269
270 return count;
271}
272
273static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg9dde6422012-05-16 23:43:19 +0200274 struct sk_buff *skb, u8 ap_ht_param,
Johannes Berg66e67e42012-01-20 13:55:27 +0100275 struct ieee80211_supported_band *sband,
276 struct ieee80211_channel *channel,
277 enum ieee80211_smps_mode smps)
278{
Johannes Berg66e67e42012-01-20 13:55:27 +0100279 u8 *pos;
280 u32 flags = channel->flags;
281 u16 cap;
282 struct ieee80211_sta_ht_cap ht_cap;
283
284 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
285
Johannes Berg66e67e42012-01-20 13:55:27 +0100286 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
287 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
288
Johannes Berg66e67e42012-01-20 13:55:27 +0100289 /* determine capability flags */
290 cap = ht_cap.cap;
291
Johannes Berg9dde6422012-05-16 23:43:19 +0200292 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Johannes Berg66e67e42012-01-20 13:55:27 +0100293 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
294 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
295 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
296 cap &= ~IEEE80211_HT_CAP_SGI_40;
297 }
298 break;
299 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
300 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
301 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
302 cap &= ~IEEE80211_HT_CAP_SGI_40;
303 }
304 break;
305 }
306
Johannes Berg24398e32012-03-28 10:58:36 +0200307 /*
308 * If 40 MHz was disabled associate as though we weren't
309 * capable of 40 MHz -- some broken APs will never fall
310 * back to trying to transmit in 20 MHz.
311 */
312 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
313 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
314 cap &= ~IEEE80211_HT_CAP_SGI_40;
315 }
316
Johannes Berg66e67e42012-01-20 13:55:27 +0100317 /* set SM PS mode properly */
318 cap &= ~IEEE80211_HT_CAP_SM_PS;
319 switch (smps) {
320 case IEEE80211_SMPS_AUTOMATIC:
321 case IEEE80211_SMPS_NUM_MODES:
322 WARN_ON(1);
323 case IEEE80211_SMPS_OFF:
324 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
325 IEEE80211_HT_CAP_SM_PS_SHIFT;
326 break;
327 case IEEE80211_SMPS_STATIC:
328 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
329 IEEE80211_HT_CAP_SM_PS_SHIFT;
330 break;
331 case IEEE80211_SMPS_DYNAMIC:
332 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
333 IEEE80211_HT_CAP_SM_PS_SHIFT;
334 break;
335 }
336
337 /* reserve and fill IE */
338 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
339 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
340}
341
Mahesh Palivelad545dab2012-07-24 03:33:10 +0000342static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
343 struct sk_buff *skb,
344 struct ieee80211_supported_band *sband)
345{
346 u8 *pos;
347 u32 cap;
348 struct ieee80211_sta_vht_cap vht_cap;
349
350 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
351
352 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
353
354 /* determine capability flags */
355 cap = vht_cap.cap;
356
Johannes Bergf2d9d272012-11-22 14:11:39 +0100357 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
358 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
359 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
360 }
361
362 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
363 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
364 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
365 }
366
Mahesh Palivelad545dab2012-07-24 03:33:10 +0000367 /* reserve and fill IE */
Mahesh Palivelad4950282012-10-10 11:25:40 +0000368 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
Mahesh Palivelad545dab2012-07-24 03:33:10 +0000369 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
370}
371
Johannes Berg66e67e42012-01-20 13:55:27 +0100372static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
373{
374 struct ieee80211_local *local = sdata->local;
375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
376 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
377 struct sk_buff *skb;
378 struct ieee80211_mgmt *mgmt;
379 u8 *pos, qos_info;
380 size_t offset = 0, noffset;
381 int i, count, rates_len, supp_rates_len;
382 u16 capab;
383 struct ieee80211_supported_band *sband;
Johannes Berg55de9082012-07-26 17:24:39 +0200384 struct ieee80211_chanctx_conf *chanctx_conf;
385 struct ieee80211_channel *chan;
Johannes Berg66e67e42012-01-20 13:55:27 +0100386 u32 rates = 0;
Johannes Berg66e67e42012-01-20 13:55:27 +0100387
388 lockdep_assert_held(&ifmgd->mtx);
389
Johannes Berg55de9082012-07-26 17:24:39 +0200390 rcu_read_lock();
391 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
392 if (WARN_ON(!chanctx_conf)) {
393 rcu_read_unlock();
394 return;
395 }
Johannes Berg4bf88532012-11-09 11:39:59 +0100396 chan = chanctx_conf->def.chan;
Johannes Berg55de9082012-07-26 17:24:39 +0200397 rcu_read_unlock();
398 sband = local->hw.wiphy->bands[chan->band];
Johannes Berg66e67e42012-01-20 13:55:27 +0100399
400 if (assoc_data->supp_rates_len) {
401 /*
402 * Get all rates supported by the device and the AP as
403 * some APs don't like getting a superset of their rates
404 * in the association request (e.g. D-Link DAP 1353 in
405 * b-only mode)...
406 */
407 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
408 assoc_data->supp_rates_len,
409 sband, &rates);
410 } else {
411 /*
412 * In case AP not provide any supported rates information
413 * before association, we send information element(s) with
414 * all rates that we support.
415 */
416 rates = ~0;
417 rates_len = sband->n_bitrates;
418 }
419
420 skb = alloc_skb(local->hw.extra_tx_headroom +
421 sizeof(*mgmt) + /* bit too much but doesn't matter */
422 2 + assoc_data->ssid_len + /* SSID */
423 4 + rates_len + /* (extended) rates */
424 4 + /* power capability */
425 2 + 2 * sband->n_channels + /* supported channels */
426 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
Mahesh Palivelad4950282012-10-10 11:25:40 +0000427 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
Johannes Berg66e67e42012-01-20 13:55:27 +0100428 assoc_data->ie_len + /* extra IEs */
429 9, /* WMM */
430 GFP_KERNEL);
431 if (!skb)
432 return;
433
434 skb_reserve(skb, local->hw.extra_tx_headroom);
435
436 capab = WLAN_CAPABILITY_ESS;
437
438 if (sband->band == IEEE80211_BAND_2GHZ) {
439 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
440 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
441 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
442 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
443 }
444
445 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
446 capab |= WLAN_CAPABILITY_PRIVACY;
447
448 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
449 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
450 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
451
452 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
453 memset(mgmt, 0, 24);
454 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
455 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
456 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
457
458 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
459 skb_put(skb, 10);
460 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
461 IEEE80211_STYPE_REASSOC_REQ);
462 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
463 mgmt->u.reassoc_req.listen_interval =
464 cpu_to_le16(local->hw.conf.listen_interval);
465 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
466 ETH_ALEN);
467 } else {
468 skb_put(skb, 4);
469 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
470 IEEE80211_STYPE_ASSOC_REQ);
471 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
472 mgmt->u.assoc_req.listen_interval =
473 cpu_to_le16(local->hw.conf.listen_interval);
474 }
475
476 /* SSID */
477 pos = skb_put(skb, 2 + assoc_data->ssid_len);
478 *pos++ = WLAN_EID_SSID;
479 *pos++ = assoc_data->ssid_len;
480 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
481
482 /* add all rates which were marked to be used above */
483 supp_rates_len = rates_len;
484 if (supp_rates_len > 8)
485 supp_rates_len = 8;
486
487 pos = skb_put(skb, supp_rates_len + 2);
488 *pos++ = WLAN_EID_SUPP_RATES;
489 *pos++ = supp_rates_len;
490
491 count = 0;
492 for (i = 0; i < sband->n_bitrates; i++) {
493 if (BIT(i) & rates) {
494 int rate = sband->bitrates[i].bitrate;
495 *pos++ = (u8) (rate / 5);
496 if (++count == 8)
497 break;
498 }
499 }
500
501 if (rates_len > count) {
502 pos = skb_put(skb, rates_len - count + 2);
503 *pos++ = WLAN_EID_EXT_SUPP_RATES;
504 *pos++ = rates_len - count;
505
506 for (i++; i < sband->n_bitrates; i++) {
507 if (BIT(i) & rates) {
508 int rate = sband->bitrates[i].bitrate;
509 *pos++ = (u8) (rate / 5);
510 }
511 }
512 }
513
514 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
515 /* 1. power capabilities */
516 pos = skb_put(skb, 4);
517 *pos++ = WLAN_EID_PWR_CAPABILITY;
518 *pos++ = 2;
519 *pos++ = 0; /* min tx power */
Johannes Berg55de9082012-07-26 17:24:39 +0200520 *pos++ = chan->max_power; /* max tx power */
Johannes Berg66e67e42012-01-20 13:55:27 +0100521
522 /* 2. supported channels */
523 /* TODO: get this in reg domain format */
524 pos = skb_put(skb, 2 * sband->n_channels + 2);
525 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
526 *pos++ = 2 * sband->n_channels;
527 for (i = 0; i < sband->n_channels; i++) {
528 *pos++ = ieee80211_frequency_to_channel(
529 sband->channels[i].center_freq);
530 *pos++ = 1; /* one channel in the subband*/
531 }
532 }
533
534 /* if present, add any custom IEs that go before HT */
535 if (assoc_data->ie_len && assoc_data->ie) {
536 static const u8 before_ht[] = {
537 WLAN_EID_SSID,
538 WLAN_EID_SUPP_RATES,
539 WLAN_EID_EXT_SUPP_RATES,
540 WLAN_EID_PWR_CAPABILITY,
541 WLAN_EID_SUPPORTED_CHANNELS,
542 WLAN_EID_RSN,
543 WLAN_EID_QOS_CAPA,
544 WLAN_EID_RRM_ENABLED_CAPABILITIES,
545 WLAN_EID_MOBILITY_DOMAIN,
546 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
547 };
548 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
549 before_ht, ARRAY_SIZE(before_ht),
550 offset);
551 pos = skb_put(skb, noffset - offset);
552 memcpy(pos, assoc_data->ie + offset, noffset - offset);
553 offset = noffset;
554 }
555
Johannes Bergf2d9d272012-11-22 14:11:39 +0100556 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
557 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
558 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
559
Johannes Berga8243b72012-11-22 14:32:09 +0100560 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
Johannes Berg9dde6422012-05-16 23:43:19 +0200561 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
Johannes Berg04ecd252012-09-11 14:34:12 +0200562 sband, chan, sdata->smps_mode);
Johannes Berg66e67e42012-01-20 13:55:27 +0100563
Mahesh Palivelad545dab2012-07-24 03:33:10 +0000564 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
565 ieee80211_add_vht_ie(sdata, skb, sband);
566
Johannes Berg66e67e42012-01-20 13:55:27 +0100567 /* if present, add any custom non-vendor IEs that go after HT */
568 if (assoc_data->ie_len && assoc_data->ie) {
569 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
570 assoc_data->ie_len,
571 offset);
572 pos = skb_put(skb, noffset - offset);
573 memcpy(pos, assoc_data->ie + offset, noffset - offset);
574 offset = noffset;
575 }
576
Johannes Berg76f03032012-03-08 15:02:05 +0100577 if (assoc_data->wmm) {
578 if (assoc_data->uapsd) {
Eliad Pellerdc41e4d2012-03-14 16:15:03 +0200579 qos_info = ifmgd->uapsd_queues;
580 qos_info |= (ifmgd->uapsd_max_sp_len <<
Johannes Berg66e67e42012-01-20 13:55:27 +0100581 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
582 } else {
583 qos_info = 0;
584 }
585
586 pos = skb_put(skb, 9);
587 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
588 *pos++ = 7; /* len */
589 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
590 *pos++ = 0x50;
591 *pos++ = 0xf2;
592 *pos++ = 2; /* WME */
593 *pos++ = 0; /* WME info */
594 *pos++ = 1; /* WME ver */
595 *pos++ = qos_info;
596 }
597
598 /* add any remaining custom (i.e. vendor specific here) IEs */
599 if (assoc_data->ie_len && assoc_data->ie) {
600 noffset = assoc_data->ie_len;
601 pos = skb_put(skb, noffset - offset);
602 memcpy(pos, assoc_data->ie + offset, noffset - offset);
603 }
604
Johannes Berga1845fc2012-06-27 13:18:36 +0200605 drv_mgd_prepare_tx(local, sdata);
606
Johannes Berg66e67e42012-01-20 13:55:27 +0100607 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
608 ieee80211_tx_skb(sdata, skb);
609}
610
Kalle Valo572e0012009-02-10 17:09:31 +0200611void ieee80211_send_pspoll(struct ieee80211_local *local,
612 struct ieee80211_sub_if_data *sdata)
613{
Kalle Valo572e0012009-02-10 17:09:31 +0200614 struct ieee80211_pspoll *pspoll;
615 struct sk_buff *skb;
Kalle Valo572e0012009-02-10 17:09:31 +0200616
Kalle Valod8cd1892010-01-05 20:16:26 +0200617 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
618 if (!skb)
Kalle Valo572e0012009-02-10 17:09:31 +0200619 return;
Kalle Valo572e0012009-02-10 17:09:31 +0200620
Kalle Valod8cd1892010-01-05 20:16:26 +0200621 pspoll = (struct ieee80211_pspoll *) skb->data;
622 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
Kalle Valo572e0012009-02-10 17:09:31 +0200623
Johannes Berg62ae67b2009-11-18 18:42:05 +0100624 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
625 ieee80211_tx_skb(sdata, skb);
Kalle Valo572e0012009-02-10 17:09:31 +0200626}
627
Johannes Berg965beda2009-04-16 13:17:24 +0200628void ieee80211_send_nullfunc(struct ieee80211_local *local,
629 struct ieee80211_sub_if_data *sdata,
630 int powersave)
631{
632 struct sk_buff *skb;
Kalle Valod8cd1892010-01-05 20:16:26 +0200633 struct ieee80211_hdr_3addr *nullfunc;
Rajkumar Manoharanb6f35302011-09-29 20:34:04 +0530634 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg965beda2009-04-16 13:17:24 +0200635
Kalle Valod8cd1892010-01-05 20:16:26 +0200636 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
637 if (!skb)
Johannes Berg965beda2009-04-16 13:17:24 +0200638 return;
639
Kalle Valod8cd1892010-01-05 20:16:26 +0200640 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
Johannes Berg965beda2009-04-16 13:17:24 +0200641 if (powersave)
Kalle Valod8cd1892010-01-05 20:16:26 +0200642 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
Johannes Berg965beda2009-04-16 13:17:24 +0200643
Johannes Berg62ae67b2009-11-18 18:42:05 +0100644 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Rajkumar Manoharanb6f35302011-09-29 20:34:04 +0530645 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
646 IEEE80211_STA_CONNECTION_POLL))
647 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
648
Johannes Berg62ae67b2009-11-18 18:42:05 +0100649 ieee80211_tx_skb(sdata, skb);
Johannes Berg965beda2009-04-16 13:17:24 +0200650}
651
Felix Fietkaud5242152010-01-08 18:06:26 +0100652static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
653 struct ieee80211_sub_if_data *sdata)
654{
655 struct sk_buff *skb;
656 struct ieee80211_hdr *nullfunc;
657 __le16 fc;
658
659 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
660 return;
661
662 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
Joe Perchesd15b8452011-08-29 14:17:31 -0700663 if (!skb)
Felix Fietkaud5242152010-01-08 18:06:26 +0100664 return;
Joe Perchesd15b8452011-08-29 14:17:31 -0700665
Felix Fietkaud5242152010-01-08 18:06:26 +0100666 skb_reserve(skb, local->hw.extra_tx_headroom);
667
668 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
669 memset(nullfunc, 0, 30);
670 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
671 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
672 nullfunc->frame_control = fc;
673 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
674 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
675 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
676 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
677
678 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
679 ieee80211_tx_skb(sdata, skb);
680}
681
Johannes Bergcc32abd2009-05-15 11:52:31 +0200682/* spectrum management related things */
683static void ieee80211_chswitch_work(struct work_struct *work)
684{
685 struct ieee80211_sub_if_data *sdata =
686 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200687 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
688
Johannes Berg9607e6b2009-12-23 13:15:31 +0100689 if (!ieee80211_sdata_running(sdata))
Johannes Bergcc32abd2009-05-15 11:52:31 +0200690 return;
691
Johannes Berg77fdaa12009-07-07 03:45:17 +0200692 mutex_lock(&ifmgd->mtx);
693 if (!ifmgd->associated)
694 goto out;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200695
Johannes Berg55de9082012-07-26 17:24:39 +0200696 sdata->local->_oper_channel = sdata->local->csa_channel;
Johannes Berg5ce6e432010-05-11 16:20:57 +0200697 if (!sdata->local->ops->channel_switch) {
698 /* call "hw_config" only if doing sw channel switch */
699 ieee80211_hw_config(sdata->local,
700 IEEE80211_CONF_CHANGE_CHANNEL);
Shahar Levi1ea57b12011-09-08 08:44:05 +0300701 } else {
702 /* update the device channel directly */
Johannes Berg55de9082012-07-26 17:24:39 +0200703 sdata->local->hw.conf.channel = sdata->local->_oper_channel;
Johannes Berg5ce6e432010-05-11 16:20:57 +0200704 }
Johannes Bergcc32abd2009-05-15 11:52:31 +0200705
Johannes Berg77fdaa12009-07-07 03:45:17 +0200706 /* XXX: shouldn't really modify cfg80211-owned data! */
Johannes Berg55de9082012-07-26 17:24:39 +0200707 ifmgd->associated->channel = sdata->local->_oper_channel;
Johannes Berg77fdaa12009-07-07 03:45:17 +0200708
Johannes Berg57eebdf2012-08-01 15:50:46 +0200709 /* XXX: wait for a beacon first? */
Johannes Bergcc32abd2009-05-15 11:52:31 +0200710 ieee80211_wake_queues_by_reason(&sdata->local->hw,
711 IEEE80211_QUEUE_STOP_REASON_CSA);
Johannes Berg77fdaa12009-07-07 03:45:17 +0200712 out:
713 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
714 mutex_unlock(&ifmgd->mtx);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200715}
716
Johannes Berg5ce6e432010-05-11 16:20:57 +0200717void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
718{
Johannes Berg55de9082012-07-26 17:24:39 +0200719 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg5ce6e432010-05-11 16:20:57 +0200721
722 trace_api_chswitch_done(sdata, success);
723 if (!success) {
Johannes Berg882a7c62012-08-01 22:32:45 +0200724 sdata_info(sdata,
725 "driver channel switch failed, disconnecting\n");
726 ieee80211_queue_work(&sdata->local->hw,
727 &ifmgd->csa_connection_drop_work);
728 } else {
729 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Berg5ce6e432010-05-11 16:20:57 +0200730 }
Johannes Berg5ce6e432010-05-11 16:20:57 +0200731}
732EXPORT_SYMBOL(ieee80211_chswitch_done);
733
Johannes Bergcc32abd2009-05-15 11:52:31 +0200734static void ieee80211_chswitch_timer(unsigned long data)
735{
736 struct ieee80211_sub_if_data *sdata =
737 (struct ieee80211_sub_if_data *) data;
738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
739
Johannes Berg5bb644a2009-05-17 11:40:42 +0200740 if (sdata->local->quiescing) {
741 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
742 return;
743 }
744
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400745 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200746}
747
748void ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
749 struct ieee80211_channel_sw_ie *sw_elem,
Johannes Berg5ce6e432010-05-11 16:20:57 +0200750 struct ieee80211_bss *bss,
751 u64 timestamp)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200752{
Johannes Berg0c1ad2c2009-12-23 13:15:39 +0100753 struct cfg80211_bss *cbss =
754 container_of((void *)bss, struct cfg80211_bss, priv);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200755 struct ieee80211_channel *new_ch;
756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Bruno Randolf59eb21a2011-01-17 13:37:28 +0900757 int new_freq = ieee80211_channel_to_frequency(sw_elem->new_ch_num,
758 cbss->channel->band);
Johannes Berg55de9082012-07-26 17:24:39 +0200759 struct ieee80211_chanctx *chanctx;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200760
Johannes Berg77fdaa12009-07-07 03:45:17 +0200761 ASSERT_MGD_MTX(ifmgd);
762
763 if (!ifmgd->associated)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200764 return;
765
Helmut Schaafbe9c422009-07-23 12:14:04 +0200766 if (sdata->local->scanning)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200767 return;
768
769 /* Disregard subsequent beacons if we are already running a timer
770 processing a CSA */
771
772 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
773 return;
774
775 new_ch = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
Johannes Berg882a7c62012-08-01 22:32:45 +0200776 if (!new_ch || new_ch->flags & IEEE80211_CHAN_DISABLED) {
777 sdata_info(sdata,
778 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
779 ifmgd->associated->bssid, new_freq);
780 ieee80211_queue_work(&sdata->local->hw,
781 &ifmgd->csa_connection_drop_work);
Johannes Bergcc32abd2009-05-15 11:52:31 +0200782 return;
Johannes Berg882a7c62012-08-01 22:32:45 +0200783 }
Johannes Bergcc32abd2009-05-15 11:52:31 +0200784
Johannes Berg57eebdf2012-08-01 15:50:46 +0200785 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
786
Johannes Berg55de9082012-07-26 17:24:39 +0200787 if (sdata->local->use_chanctx) {
788 sdata_info(sdata,
789 "not handling channel switch with channel contexts\n");
790 ieee80211_queue_work(&sdata->local->hw,
791 &ifmgd->csa_connection_drop_work);
Simon Wunderlich246dc3f2012-11-30 19:17:27 +0100792 return;
Johannes Berg55de9082012-07-26 17:24:39 +0200793 }
794
795 mutex_lock(&sdata->local->chanctx_mtx);
796 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
797 mutex_unlock(&sdata->local->chanctx_mtx);
798 return;
799 }
800 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
801 struct ieee80211_chanctx, conf);
802 if (chanctx->refcount > 1) {
803 sdata_info(sdata,
804 "channel switch with multiple interfaces on the same channel, disconnecting\n");
805 ieee80211_queue_work(&sdata->local->hw,
806 &ifmgd->csa_connection_drop_work);
807 mutex_unlock(&sdata->local->chanctx_mtx);
808 return;
809 }
810 mutex_unlock(&sdata->local->chanctx_mtx);
811
812 sdata->local->csa_channel = new_ch;
813
Johannes Berg57eebdf2012-08-01 15:50:46 +0200814 if (sw_elem->mode)
815 ieee80211_stop_queues_by_reason(&sdata->local->hw,
816 IEEE80211_QUEUE_STOP_REASON_CSA);
817
Johannes Berg5ce6e432010-05-11 16:20:57 +0200818 if (sdata->local->ops->channel_switch) {
819 /* use driver's channel switch callback */
Johannes Berg57eebdf2012-08-01 15:50:46 +0200820 struct ieee80211_channel_switch ch_switch = {
821 .timestamp = timestamp,
822 .block_tx = sw_elem->mode,
823 .channel = new_ch,
824 .count = sw_elem->count,
825 };
826
Johannes Berg5ce6e432010-05-11 16:20:57 +0200827 drv_channel_switch(sdata->local, &ch_switch);
828 return;
829 }
830
831 /* channel switch handled in software */
Johannes Berg57eebdf2012-08-01 15:50:46 +0200832 if (sw_elem->count <= 1)
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400833 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
Johannes Berg57eebdf2012-08-01 15:50:46 +0200834 else
Johannes Bergcc32abd2009-05-15 11:52:31 +0200835 mod_timer(&ifmgd->chswitch_timer,
Johannes Berg30490002012-08-01 15:53:45 +0200836 TU_TO_EXP_TIME(sw_elem->count *
837 cbss->beacon_interval));
Johannes Bergcc32abd2009-05-15 11:52:31 +0200838}
839
Johannes Berg1ea6f9c2012-10-24 10:59:25 +0200840static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
841 struct ieee80211_channel *channel,
842 const u8 *country_ie, u8 country_ie_len,
843 const u8 *pwr_constr_elem)
Johannes Bergcc32abd2009-05-15 11:52:31 +0200844{
Johannes Berg04b7b2f2012-09-05 13:41:37 +0200845 struct ieee80211_country_ie_triplet *triplet;
846 int chan = ieee80211_frequency_to_channel(channel->center_freq);
847 int i, chan_pwr, chan_increment, new_ap_level;
848 bool have_chan_pwr = false;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200849
Johannes Berg04b7b2f2012-09-05 13:41:37 +0200850 /* Invalid IE */
851 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
Johannes Berg1ea6f9c2012-10-24 10:59:25 +0200852 return 0;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200853
Johannes Berg04b7b2f2012-09-05 13:41:37 +0200854 triplet = (void *)(country_ie + 3);
855 country_ie_len -= 3;
856
857 switch (channel->band) {
858 default:
859 WARN_ON_ONCE(1);
860 /* fall through */
861 case IEEE80211_BAND_2GHZ:
862 case IEEE80211_BAND_60GHZ:
863 chan_increment = 1;
864 break;
865 case IEEE80211_BAND_5GHZ:
866 chan_increment = 4;
867 break;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200868 }
Johannes Berg04b7b2f2012-09-05 13:41:37 +0200869
870 /* find channel */
871 while (country_ie_len >= 3) {
872 u8 first_channel = triplet->chans.first_channel;
873
874 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
875 goto next;
876
877 for (i = 0; i < triplet->chans.num_channels; i++) {
878 if (first_channel + i * chan_increment == chan) {
879 have_chan_pwr = true;
880 chan_pwr = triplet->chans.max_power;
881 break;
882 }
883 }
884 if (have_chan_pwr)
885 break;
886
887 next:
888 triplet++;
889 country_ie_len -= 3;
890 }
891
892 if (!have_chan_pwr)
Johannes Berg1ea6f9c2012-10-24 10:59:25 +0200893 return 0;
Johannes Berg04b7b2f2012-09-05 13:41:37 +0200894
895 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
896
Johannes Berg1ea6f9c2012-10-24 10:59:25 +0200897 if (sdata->ap_power_level == new_ap_level)
898 return 0;
Johannes Berg04b7b2f2012-09-05 13:41:37 +0200899
900 sdata_info(sdata,
901 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
902 new_ap_level, chan_pwr, *pwr_constr_elem,
903 sdata->u.mgd.bssid);
Johannes Berg1ea6f9c2012-10-24 10:59:25 +0200904 sdata->ap_power_level = new_ap_level;
905 if (__ieee80211_recalc_txpower(sdata))
906 return BSS_CHANGED_TXPOWER;
907 return 0;
Johannes Bergcc32abd2009-05-15 11:52:31 +0200908}
909
Juuso Oikarinenf90754c2010-06-21 08:59:39 +0300910void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif)
911{
912 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
913 struct ieee80211_local *local = sdata->local;
914 struct ieee80211_conf *conf = &local->hw.conf;
915
916 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
917 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
918 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
919
920 local->disable_dynamic_ps = false;
921 conf->dynamic_ps_timeout = local->dynamic_ps_user_timeout;
922}
923EXPORT_SYMBOL(ieee80211_enable_dyn_ps);
924
925void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif)
926{
927 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
928 struct ieee80211_local *local = sdata->local;
929 struct ieee80211_conf *conf = &local->hw.conf;
930
931 WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION ||
932 !(local->hw.flags & IEEE80211_HW_SUPPORTS_PS) ||
933 (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS));
934
935 local->disable_dynamic_ps = true;
936 conf->dynamic_ps_timeout = 0;
937 del_timer_sync(&local->dynamic_ps_timer);
938 ieee80211_queue_work(&local->hw,
939 &local->dynamic_ps_enable_work);
940}
941EXPORT_SYMBOL(ieee80211_disable_dyn_ps);
942
Johannes Berg965beda2009-04-16 13:17:24 +0200943/* powersave */
944static void ieee80211_enable_ps(struct ieee80211_local *local,
945 struct ieee80211_sub_if_data *sdata)
946{
947 struct ieee80211_conf *conf = &local->hw.conf;
948
Johannes Bergd5edaed2009-04-22 23:02:51 +0200949 /*
950 * If we are scanning right now then the parameters will
951 * take effect when scan finishes.
952 */
Helmut Schaafbe9c422009-07-23 12:14:04 +0200953 if (local->scanning)
Johannes Bergd5edaed2009-04-22 23:02:51 +0200954 return;
955
Johannes Berg965beda2009-04-16 13:17:24 +0200956 if (conf->dynamic_ps_timeout > 0 &&
957 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
958 mod_timer(&local->dynamic_ps_timer, jiffies +
959 msecs_to_jiffies(conf->dynamic_ps_timeout));
960 } else {
961 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
962 ieee80211_send_nullfunc(local, sdata, 1);
Vivek Natarajan375177b2010-02-09 14:50:28 +0530963
Juuso Oikarinen2a130522010-03-09 14:25:02 +0200964 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
965 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
966 return;
967
968 conf->flags |= IEEE80211_CONF_PS;
969 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
Johannes Berg965beda2009-04-16 13:17:24 +0200970 }
971}
972
973static void ieee80211_change_ps(struct ieee80211_local *local)
974{
975 struct ieee80211_conf *conf = &local->hw.conf;
976
977 if (local->ps_sdata) {
Johannes Berg965beda2009-04-16 13:17:24 +0200978 ieee80211_enable_ps(local, local->ps_sdata);
979 } else if (conf->flags & IEEE80211_CONF_PS) {
980 conf->flags &= ~IEEE80211_CONF_PS;
981 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
982 del_timer_sync(&local->dynamic_ps_timer);
983 cancel_work_sync(&local->dynamic_ps_enable_work);
984 }
985}
986
Jason Young808118c2011-03-10 16:43:19 -0800987static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
988{
989 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
990 struct sta_info *sta = NULL;
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200991 bool authorized = false;
Jason Young808118c2011-03-10 16:43:19 -0800992
993 if (!mgd->powersave)
994 return false;
995
Johannes Berg05cb9102011-10-28 11:59:47 +0200996 if (mgd->broken_ap)
997 return false;
998
Jason Young808118c2011-03-10 16:43:19 -0800999 if (!mgd->associated)
1000 return false;
1001
Jason Young808118c2011-03-10 16:43:19 -08001002 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1003 IEEE80211_STA_CONNECTION_POLL))
1004 return false;
1005
1006 rcu_read_lock();
1007 sta = sta_info_get(sdata, mgd->bssid);
1008 if (sta)
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001009 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Jason Young808118c2011-03-10 16:43:19 -08001010 rcu_read_unlock();
1011
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001012 return authorized;
Jason Young808118c2011-03-10 16:43:19 -08001013}
1014
Johannes Berg965beda2009-04-16 13:17:24 +02001015/* need to hold RTNL or interface lock */
Johannes Berg10f644a2009-04-16 13:17:25 +02001016void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
Johannes Berg965beda2009-04-16 13:17:24 +02001017{
1018 struct ieee80211_sub_if_data *sdata, *found = NULL;
1019 int count = 0;
Juuso Oikarinen195e2942010-04-27 12:47:40 +03001020 int timeout;
Johannes Berg965beda2009-04-16 13:17:24 +02001021
1022 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1023 local->ps_sdata = NULL;
1024 return;
1025 }
1026
1027 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg9607e6b2009-12-23 13:15:31 +01001028 if (!ieee80211_sdata_running(sdata))
Johannes Berg965beda2009-04-16 13:17:24 +02001029 continue;
Rajkumar Manoharan8c7914d2011-02-01 00:28:59 +05301030 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1031 /* If an AP vif is found, then disable PS
1032 * by setting the count to zero thereby setting
1033 * ps_sdata to NULL.
1034 */
1035 count = 0;
1036 break;
1037 }
Johannes Berg965beda2009-04-16 13:17:24 +02001038 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1039 continue;
1040 found = sdata;
1041 count++;
1042 }
1043
Jason Young808118c2011-03-10 16:43:19 -08001044 if (count == 1 && ieee80211_powersave_allowed(found)) {
Juuso Oikarinenf90754c2010-06-21 08:59:39 +03001045 struct ieee80211_conf *conf = &local->hw.conf;
Johannes Berg10f644a2009-04-16 13:17:25 +02001046 s32 beaconint_us;
1047
1048 if (latency < 0)
Mark Grossed771342010-05-06 01:59:26 +02001049 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
Johannes Berg10f644a2009-04-16 13:17:25 +02001050
1051 beaconint_us = ieee80211_tu_to_usec(
1052 found->vif.bss_conf.beacon_int);
1053
Juuso Oikarinenff616382010-06-09 09:51:52 +03001054 timeout = local->dynamic_ps_forced_timeout;
Juuso Oikarinen195e2942010-04-27 12:47:40 +03001055 if (timeout < 0) {
1056 /*
Juuso Oikarinenff616382010-06-09 09:51:52 +03001057 * Go to full PSM if the user configures a very low
1058 * latency requirement.
Eliad Peller0ab82b02010-12-03 02:16:23 +02001059 * The 2000 second value is there for compatibility
1060 * until the PM_QOS_NETWORK_LATENCY is configured
1061 * with real values.
Juuso Oikarinen195e2942010-04-27 12:47:40 +03001062 */
Eliad Peller0ab82b02010-12-03 02:16:23 +02001063 if (latency > (1900 * USEC_PER_MSEC) &&
1064 latency != (2000 * USEC_PER_SEC))
Juuso Oikarinen195e2942010-04-27 12:47:40 +03001065 timeout = 0;
Juuso Oikarinenff616382010-06-09 09:51:52 +03001066 else
1067 timeout = 100;
Juuso Oikarinen195e2942010-04-27 12:47:40 +03001068 }
Juuso Oikarinenf90754c2010-06-21 08:59:39 +03001069 local->dynamic_ps_user_timeout = timeout;
1070 if (!local->disable_dynamic_ps)
1071 conf->dynamic_ps_timeout =
1072 local->dynamic_ps_user_timeout;
Juuso Oikarinen195e2942010-04-27 12:47:40 +03001073
Johannes Berg04fe2032009-04-22 18:44:37 +02001074 if (beaconint_us > latency) {
Johannes Berg10f644a2009-04-16 13:17:25 +02001075 local->ps_sdata = NULL;
Johannes Berg04fe2032009-04-22 18:44:37 +02001076 } else {
Johannes Berg56007a02010-01-26 14:19:52 +01001077 struct ieee80211_bss *bss;
Johannes Berg04fe2032009-04-22 18:44:37 +02001078 int maxslp = 1;
Johannes Berg56007a02010-01-26 14:19:52 +01001079 u8 dtimper;
Johannes Berg04fe2032009-04-22 18:44:37 +02001080
Johannes Berg56007a02010-01-26 14:19:52 +01001081 bss = (void *)found->u.mgd.associated->priv;
1082 dtimper = bss->dtim_period;
1083
1084 /* If the TIM IE is invalid, pretend the value is 1 */
1085 if (!dtimper)
1086 dtimper = 1;
1087 else if (dtimper > 1)
Johannes Berg04fe2032009-04-22 18:44:37 +02001088 maxslp = min_t(int, dtimper,
1089 latency / beaconint_us);
1090
Johannes Berg9ccebe62009-04-23 10:32:36 +02001091 local->hw.conf.max_sleep_period = maxslp;
Johannes Berg56007a02010-01-26 14:19:52 +01001092 local->hw.conf.ps_dtim_period = dtimper;
Johannes Berg10f644a2009-04-16 13:17:25 +02001093 local->ps_sdata = found;
Johannes Berg04fe2032009-04-22 18:44:37 +02001094 }
Johannes Berg10f644a2009-04-16 13:17:25 +02001095 } else {
Johannes Berg965beda2009-04-16 13:17:24 +02001096 local->ps_sdata = NULL;
Johannes Berg10f644a2009-04-16 13:17:25 +02001097 }
Johannes Berg965beda2009-04-16 13:17:24 +02001098
1099 ieee80211_change_ps(local);
1100}
1101
Eliad Pellerab095872012-07-27 12:33:22 +03001102void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1103{
1104 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1105
1106 if (sdata->vif.bss_conf.ps != ps_allowed) {
1107 sdata->vif.bss_conf.ps = ps_allowed;
1108 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1109 }
1110}
1111
Johannes Berg965beda2009-04-16 13:17:24 +02001112void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1113{
1114 struct ieee80211_local *local =
1115 container_of(work, struct ieee80211_local,
1116 dynamic_ps_disable_work);
1117
1118 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1119 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1120 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1121 }
1122
1123 ieee80211_wake_queues_by_reason(&local->hw,
1124 IEEE80211_QUEUE_STOP_REASON_PS);
1125}
1126
1127void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1128{
1129 struct ieee80211_local *local =
1130 container_of(work, struct ieee80211_local,
1131 dynamic_ps_enable_work);
1132 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
Christian Lamparter5e340692011-06-30 21:08:43 +02001133 struct ieee80211_if_managed *ifmgd;
Rajkumar Manoharan1ddc2862011-05-03 17:03:59 +05301134 unsigned long flags;
1135 int q;
Johannes Berg965beda2009-04-16 13:17:24 +02001136
1137 /* can only happen when PS was just disabled anyway */
1138 if (!sdata)
1139 return;
1140
Christian Lamparter5e340692011-06-30 21:08:43 +02001141 ifmgd = &sdata->u.mgd;
1142
Johannes Berg965beda2009-04-16 13:17:24 +02001143 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1144 return;
1145
Arik Nemtsov77b70232011-06-26 12:06:54 +03001146 if (!local->disable_dynamic_ps &&
1147 local->hw.conf.dynamic_ps_timeout > 0) {
1148 /* don't enter PS if TX frames are pending */
1149 if (drv_tx_frames_pending(local)) {
Rajkumar Manoharan1ddc2862011-05-03 17:03:59 +05301150 mod_timer(&local->dynamic_ps_timer, jiffies +
1151 msecs_to_jiffies(
1152 local->hw.conf.dynamic_ps_timeout));
1153 return;
1154 }
Arik Nemtsov77b70232011-06-26 12:06:54 +03001155
1156 /*
1157 * transmission can be stopped by others which leads to
1158 * dynamic_ps_timer expiry. Postpone the ps timer if it
1159 * is not the actual idle state.
1160 */
1161 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1162 for (q = 0; q < local->hw.queues; q++) {
1163 if (local->queue_stop_reasons[q]) {
1164 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1165 flags);
1166 mod_timer(&local->dynamic_ps_timer, jiffies +
1167 msecs_to_jiffies(
1168 local->hw.conf.dynamic_ps_timeout));
1169 return;
1170 }
1171 }
1172 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Rajkumar Manoharan1ddc2862011-05-03 17:03:59 +05301173 }
Rajkumar Manoharan1ddc2862011-05-03 17:03:59 +05301174
Vivek Natarajan375177b2010-02-09 14:50:28 +05301175 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
Mohammed Shafi Shajakhan9c38a8b2011-12-14 19:46:07 +05301176 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
Vivek Natarajanf3e85b92011-02-23 13:04:32 +05301177 netif_tx_stop_all_queues(sdata->dev);
Johannes Berg965beda2009-04-16 13:17:24 +02001178
Vivek Natarajane8306f92011-04-06 11:41:10 +05301179 if (drv_tx_frames_pending(local))
1180 mod_timer(&local->dynamic_ps_timer, jiffies +
1181 msecs_to_jiffies(
1182 local->hw.conf.dynamic_ps_timeout));
1183 else {
1184 ieee80211_send_nullfunc(local, sdata, 1);
1185 /* Flush to get the tx status of nullfunc frame */
1186 drv_flush(local, false);
1187 }
Vivek Natarajanf3e85b92011-02-23 13:04:32 +05301188 }
1189
Juuso Oikarinen2a130522010-03-09 14:25:02 +02001190 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1191 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
Vivek Natarajan375177b2010-02-09 14:50:28 +05301192 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1193 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1194 local->hw.conf.flags |= IEEE80211_CONF_PS;
1195 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1196 }
Vivek Natarajanf3e85b92011-02-23 13:04:32 +05301197
Arik Nemtsov77b70232011-06-26 12:06:54 +03001198 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1199 netif_tx_wake_all_queues(sdata->dev);
Johannes Berg965beda2009-04-16 13:17:24 +02001200}
1201
1202void ieee80211_dynamic_ps_timer(unsigned long data)
1203{
1204 struct ieee80211_local *local = (void *) data;
1205
Luis R. Rodriguez78f1a8b2009-07-27 08:38:25 -07001206 if (local->quiescing || local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001207 return;
1208
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001209 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
Johannes Berg965beda2009-04-16 13:17:24 +02001210}
1211
Johannes Berg60f8b392008-09-08 17:44:22 +02001212/* MLME */
Johannes Berg7d257452012-07-06 17:37:43 +02001213static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
Johannes Berg4ced3f72010-07-19 16:39:04 +02001214 struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07001215 u8 *wmm_param, size_t wmm_param_len)
1216{
Jiri Bencf0706e82007-05-05 11:45:53 -07001217 struct ieee80211_tx_queue_params params;
Johannes Berg4ced3f72010-07-19 16:39:04 +02001218 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07001219 size_t left;
1220 int count;
Kalle Valoab133152010-01-12 10:42:31 +02001221 u8 *pos, uapsd_queues = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001222
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001223 if (!local->ops->conf_tx)
Johannes Berg7d257452012-07-06 17:37:43 +02001224 return false;
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001225
Johannes Berg32c50572012-03-28 11:04:29 +02001226 if (local->hw.queues < IEEE80211_NUM_ACS)
Johannes Berg7d257452012-07-06 17:37:43 +02001227 return false;
Johannes Berg3434fbd2008-05-03 00:59:37 +02001228
1229 if (!wmm_param)
Johannes Berg7d257452012-07-06 17:37:43 +02001230 return false;
Johannes Berg3434fbd2008-05-03 00:59:37 +02001231
Jiri Bencf0706e82007-05-05 11:45:53 -07001232 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
Johannes Berg7d257452012-07-06 17:37:43 +02001233 return false;
Kalle Valoab133152010-01-12 10:42:31 +02001234
1235 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
Eliad Pellerdc41e4d2012-03-14 16:15:03 +02001236 uapsd_queues = ifmgd->uapsd_queues;
Kalle Valoab133152010-01-12 10:42:31 +02001237
Jiri Bencf0706e82007-05-05 11:45:53 -07001238 count = wmm_param[6] & 0x0f;
Johannes Berg46900292009-02-15 12:44:28 +01001239 if (count == ifmgd->wmm_last_param_set)
Johannes Berg7d257452012-07-06 17:37:43 +02001240 return false;
Johannes Berg46900292009-02-15 12:44:28 +01001241 ifmgd->wmm_last_param_set = count;
Jiri Bencf0706e82007-05-05 11:45:53 -07001242
1243 pos = wmm_param + 8;
1244 left = wmm_param_len - 8;
1245
1246 memset(&params, 0, sizeof(params));
1247
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001248 sdata->wmm_acm = 0;
Jiri Bencf0706e82007-05-05 11:45:53 -07001249 for (; left >= 4; left -= 4, pos += 4) {
1250 int aci = (pos[0] >> 5) & 0x03;
1251 int acm = (pos[0] >> 4) & 0x01;
Kalle Valoab133152010-01-12 10:42:31 +02001252 bool uapsd = false;
Jiri Bencf0706e82007-05-05 11:45:53 -07001253 int queue;
1254
1255 switch (aci) {
Jouni Malinen0eeb59f2009-03-05 17:23:46 +02001256 case 1: /* AC_BK */
Johannes Berge100bb62008-04-30 18:51:21 +02001257 queue = 3;
Johannes Berg988c0f72008-04-17 19:21:22 +02001258 if (acm)
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001259 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
Kalle Valoab133152010-01-12 10:42:31 +02001260 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1261 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001262 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +02001263 case 2: /* AC_VI */
Johannes Berge100bb62008-04-30 18:51:21 +02001264 queue = 1;
Johannes Berg988c0f72008-04-17 19:21:22 +02001265 if (acm)
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001266 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
Kalle Valoab133152010-01-12 10:42:31 +02001267 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1268 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001269 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +02001270 case 3: /* AC_VO */
Johannes Berge100bb62008-04-30 18:51:21 +02001271 queue = 0;
Johannes Berg988c0f72008-04-17 19:21:22 +02001272 if (acm)
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001273 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
Kalle Valoab133152010-01-12 10:42:31 +02001274 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1275 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001276 break;
Jouni Malinen0eeb59f2009-03-05 17:23:46 +02001277 case 0: /* AC_BE */
Jiri Bencf0706e82007-05-05 11:45:53 -07001278 default:
Johannes Berge100bb62008-04-30 18:51:21 +02001279 queue = 2;
Johannes Berg988c0f72008-04-17 19:21:22 +02001280 if (acm)
Yoni Divinsky00e96de2012-06-20 15:39:13 +03001281 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
Kalle Valoab133152010-01-12 10:42:31 +02001282 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1283 uapsd = true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001284 break;
1285 }
1286
1287 params.aifs = pos[0] & 0x0f;
1288 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1289 params.cw_min = ecw2cw(pos[1] & 0x0f);
Johannes Bergf434b2d2008-07-10 11:22:31 +02001290 params.txop = get_unaligned_le16(pos + 2);
Kalle Valoab133152010-01-12 10:42:31 +02001291 params.uapsd = uapsd;
1292
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001293 mlme_dbg(sdata,
1294 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1295 queue, aci, acm,
1296 params.aifs, params.cw_min, params.cw_max,
1297 params.txop, params.uapsd);
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001298 sdata->tx_conf[queue] = params;
1299 if (drv_conf_tx(local, sdata, queue, &params))
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001300 sdata_err(sdata,
1301 "failed to set TX queue parameters for queue %d\n",
1302 queue);
Jiri Bencf0706e82007-05-05 11:45:53 -07001303 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001304
1305 /* enable WMM or activate new settings */
Johannes Berg4ced3f72010-07-19 16:39:04 +02001306 sdata->vif.bss_conf.qos = true;
Johannes Berg7d257452012-07-06 17:37:43 +02001307 return true;
Jiri Bencf0706e82007-05-05 11:45:53 -07001308}
1309
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02001310static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1311{
1312 lockdep_assert_held(&sdata->local->mtx);
1313
1314 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1315 IEEE80211_STA_BEACON_POLL);
1316 ieee80211_run_deferred_scan(sdata->local);
1317}
1318
1319static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1320{
1321 mutex_lock(&sdata->local->mtx);
1322 __ieee80211_stop_poll(sdata);
1323 mutex_unlock(&sdata->local->mtx);
1324}
1325
Johannes Berg7a5158e2008-10-08 10:59:33 +02001326static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1327 u16 capab, bool erp_valid, u8 erp)
Daniel Drake56282212007-07-10 19:32:10 +02001328{
Johannes Bergbda39332008-10-11 01:51:51 +02001329 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001330 u32 changed = 0;
Johannes Berg7a5158e2008-10-08 10:59:33 +02001331 bool use_protection;
1332 bool use_short_preamble;
1333 bool use_short_slot;
1334
1335 if (erp_valid) {
1336 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1337 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1338 } else {
1339 use_protection = false;
1340 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1341 }
1342
1343 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
Johannes Berg55de9082012-07-26 17:24:39 +02001344 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
Felix Fietkau43d35342010-01-15 03:00:48 +01001345 use_short_slot = true;
Daniel Drake56282212007-07-10 19:32:10 +02001346
Johannes Berg471b3ef2007-12-28 14:32:58 +01001347 if (use_protection != bss_conf->use_cts_prot) {
Johannes Berg471b3ef2007-12-28 14:32:58 +01001348 bss_conf->use_cts_prot = use_protection;
1349 changed |= BSS_CHANGED_ERP_CTS_PROT;
Daniel Drake56282212007-07-10 19:32:10 +02001350 }
Daniel Drake7e9ed182007-07-27 15:43:24 +02001351
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +02001352 if (use_short_preamble != bss_conf->use_short_preamble) {
Vladimir Koutnyd43c7b32008-03-31 17:05:03 +02001353 bss_conf->use_short_preamble = use_short_preamble;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001354 changed |= BSS_CHANGED_ERP_PREAMBLE;
Daniel Drake7e9ed182007-07-27 15:43:24 +02001355 }
Daniel Draked9430a32007-07-27 15:43:24 +02001356
Johannes Berg7a5158e2008-10-08 10:59:33 +02001357 if (use_short_slot != bss_conf->use_short_slot) {
Johannes Berg7a5158e2008-10-08 10:59:33 +02001358 bss_conf->use_short_slot = use_short_slot;
1359 changed |= BSS_CHANGED_ERP_SLOT;
John W. Linville50c4afb2008-04-15 14:09:27 -04001360 }
1361
1362 return changed;
1363}
1364
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12001365static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001366 struct cfg80211_bss *cbss,
Johannes Bergae5eb022008-10-14 16:58:37 +02001367 u32 bss_info_changed)
Jiri Bencf0706e82007-05-05 11:45:53 -07001368{
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001369 struct ieee80211_bss *bss = (void *)cbss->priv;
Johannes Berg471b3ef2007-12-28 14:32:58 +01001370 struct ieee80211_local *local = sdata->local;
Juuso Oikarinen68542962010-06-09 13:43:26 +03001371 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Slabyd6f2da52007-08-28 17:01:54 -04001372
Johannes Bergae5eb022008-10-14 16:58:37 +02001373 bss_info_changed |= BSS_CHANGED_ASSOC;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001374 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
Luciano Coelho50ae34a2012-06-20 17:23:24 +03001375 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07001376
Felix Fietkau7ccc8bd2010-11-19 22:55:38 +01001377 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1378 IEEE80211_BEACON_LOSS_COUNT * bss_conf->beacon_int));
1379
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01001380 sdata->u.mgd.associated = cbss;
1381 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
Johannes Berg471b3ef2007-12-28 14:32:58 +01001382
Jouni Malinen17e4ec12010-03-29 23:28:30 -07001383 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1384
Johannes Berg488dd7b2012-10-29 20:08:01 +01001385 if (sdata->vif.p2p) {
Johannes Berg9caf0362012-11-29 01:25:20 +01001386 const struct cfg80211_bss_ies *ies;
Johannes Berg488dd7b2012-10-29 20:08:01 +01001387
Johannes Berg9caf0362012-11-29 01:25:20 +01001388 rcu_read_lock();
1389 ies = rcu_dereference(cbss->ies);
1390 if (ies) {
1391 u8 noa[2];
1392 int ret;
1393
1394 ret = cfg80211_get_p2p_attr(
1395 ies->data, ies->len,
1396 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1397 noa, sizeof(noa));
1398 if (ret >= 2) {
1399 bss_conf->p2p_oppps = noa[1] & 0x80;
1400 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
1401 bss_info_changed |= BSS_CHANGED_P2P_PS;
1402 sdata->u.mgd.p2p_noa_index = noa[0];
1403 }
Johannes Berg488dd7b2012-10-29 20:08:01 +01001404 }
Johannes Berg9caf0362012-11-29 01:25:20 +01001405 rcu_read_unlock();
Johannes Berg488dd7b2012-10-29 20:08:01 +01001406 }
1407
Johannes Bergb291ba12009-07-10 15:29:03 +02001408 /* just to be sure */
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02001409 ieee80211_stop_poll(sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02001410
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001411 ieee80211_led_assoc(local, 1);
1412
Johannes Berge5b900d2010-07-29 16:08:55 +02001413 if (local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD)
1414 bss_conf->dtim_period = bss->dtim_period;
1415 else
1416 bss_conf->dtim_period = 0;
1417
Juuso Oikarinen68542962010-06-09 13:43:26 +03001418 bss_conf->assoc = 1;
Johannes Berg9cef8732009-05-14 13:10:14 +02001419
Juuso Oikarinena97c13c2010-03-23 09:02:34 +02001420 /* Tell the driver to monitor connection quality (if supported) */
Johannes Bergea086352012-01-19 09:29:58 +01001421 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
Juuso Oikarinen68542962010-06-09 13:43:26 +03001422 bss_conf->cqm_rssi_thold)
Juuso Oikarinena97c13c2010-03-23 09:02:34 +02001423 bss_info_changed |= BSS_CHANGED_CQM;
1424
Juuso Oikarinen68542962010-06-09 13:43:26 +03001425 /* Enable ARP filtering */
1426 if (bss_conf->arp_filter_enabled != sdata->arp_filter_state) {
1427 bss_conf->arp_filter_enabled = sdata->arp_filter_state;
1428 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1429 }
1430
Johannes Bergae5eb022008-10-14 16:58:37 +02001431 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
Guy Cohen8db93692008-07-03 19:56:13 +03001432
Johannes Berg056508d2009-07-30 21:43:55 +02001433 mutex_lock(&local->iflist_mtx);
1434 ieee80211_recalc_ps(local, -1);
1435 mutex_unlock(&local->iflist_mtx);
Kalle Valoe0cb6862008-12-18 23:35:13 +02001436
Johannes Berg04ecd252012-09-11 14:34:12 +02001437 ieee80211_recalc_smps(sdata);
Eliad Pellerab095872012-07-27 12:33:22 +03001438 ieee80211_recalc_ps_vif(sdata);
1439
John W. Linville8a5b33f2010-01-06 15:39:39 -05001440 netif_tx_start_all_queues(sdata->dev);
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001441 netif_carrier_on(sdata->dev);
Jiri Bencf0706e82007-05-05 11:45:53 -07001442}
1443
Jouni Malinene69e95d2010-03-29 23:29:31 -07001444static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg37ad3882012-02-24 13:50:54 +01001445 u16 stype, u16 reason, bool tx,
1446 u8 *frame_buf)
Tomas Winkleraa458d12008-09-09 00:32:12 +03001447{
Johannes Berg46900292009-02-15 12:44:28 +01001448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Tomas Winkleraa458d12008-09-09 00:32:12 +03001449 struct ieee80211_local *local = sdata->local;
1450 struct sta_info *sta;
Johannes Berg3cc52402012-03-09 13:12:35 +01001451 u32 changed = 0;
Tomas Winkleraa458d12008-09-09 00:32:12 +03001452
Johannes Berg77fdaa12009-07-07 03:45:17 +02001453 ASSERT_MGD_MTX(ifmgd);
1454
Johannes Berg37ad3882012-02-24 13:50:54 +01001455 if (WARN_ON_ONCE(tx && !frame_buf))
1456 return;
1457
Johannes Bergb291ba12009-07-10 15:29:03 +02001458 if (WARN_ON(!ifmgd->associated))
1459 return;
1460
David Spinadel79543d82012-06-12 09:59:45 +03001461 ieee80211_stop_poll(sdata);
1462
Johannes Berg77fdaa12009-07-07 03:45:17 +02001463 ifmgd->associated = NULL;
Johannes Berg77fdaa12009-07-07 03:45:17 +02001464
1465 /*
1466 * we need to commit the associated = NULL change because the
1467 * scan code uses that to determine whether this iface should
1468 * go to/wake up from powersave or not -- and could otherwise
1469 * wake the queues erroneously.
1470 */
1471 smp_mb();
1472
1473 /*
1474 * Thus, we can only afterwards stop the queues -- to account
1475 * for the case where another CPU is finishing a scan at this
1476 * time -- we don't want the scan code to enable queues.
1477 */
Tomas Winkleraa458d12008-09-09 00:32:12 +03001478
John W. Linville8a5b33f2010-01-06 15:39:39 -05001479 netif_tx_stop_all_queues(sdata->dev);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001480 netif_carrier_off(sdata->dev);
1481
Johannes Berg2a419052010-06-10 10:21:29 +02001482 mutex_lock(&local->sta_mtx);
Eliad Peller88a9e312012-06-01 11:14:03 +03001483 sta = sta_info_get(sdata, ifmgd->bssid);
Sujith4cad6c72010-02-10 14:52:21 +05301484 if (sta) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001485 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
Johannes Berg7f161142012-07-18 12:53:34 +02001486 ieee80211_sta_tear_down_BA_sessions(sta, false);
Sujith4cad6c72010-02-10 14:52:21 +05301487 }
Johannes Berg2a419052010-06-10 10:21:29 +02001488 mutex_unlock(&local->sta_mtx);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001489
Eliad Peller88bc40e2012-07-12 17:35:33 +03001490 /*
1491 * if we want to get out of ps before disassoc (why?) we have
1492 * to do it before sending disassoc, as otherwise the null-packet
1493 * won't be valid.
1494 */
1495 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1496 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1497 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1498 }
1499 local->ps_sdata = NULL;
1500
Eliad Pellerab095872012-07-27 12:33:22 +03001501 /* disable per-vif ps */
1502 ieee80211_recalc_ps_vif(sdata);
1503
Eliad Pellerf8239812012-06-27 14:18:22 +03001504 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1505 if (tx)
1506 drv_flush(local, false);
1507
Johannes Berg37ad3882012-02-24 13:50:54 +01001508 /* deauthenticate/disassociate now */
1509 if (tx || frame_buf)
Eliad Peller88a9e312012-06-01 11:14:03 +03001510 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1511 reason, tx, frame_buf);
Johannes Berg37ad3882012-02-24 13:50:54 +01001512
1513 /* flush out frame */
1514 if (tx)
1515 drv_flush(local, false);
1516
Eliad Peller88a9e312012-06-01 11:14:03 +03001517 /* clear bssid only after building the needed mgmt frames */
1518 memset(ifmgd->bssid, 0, ETH_ALEN);
1519
Johannes Berg37ad3882012-02-24 13:50:54 +01001520 /* remove AP and TDLS peers */
1521 sta_info_flush(local, sdata);
1522
1523 /* finally reset all BSS / config parameters */
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001524 changed |= ieee80211_reset_erp_info(sdata);
1525
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001526 ieee80211_led_assoc(local, 0);
Johannes Bergae5eb022008-10-14 16:58:37 +02001527 changed |= BSS_CHANGED_ASSOC;
1528 sdata->vif.bss_conf.assoc = false;
Tomas Winklerf5e5bf22008-09-08 17:33:39 +02001529
Johannes Berg488dd7b2012-10-29 20:08:01 +01001530 sdata->vif.bss_conf.p2p_ctwindow = 0;
1531 sdata->vif.bss_conf.p2p_oppps = false;
1532
Johannes Berg413ad502009-05-08 21:21:06 +02001533 /* on the next assoc, re-program HT parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001534 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1535 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
Johannes Berg413ad502009-05-08 21:21:06 +02001536
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001537 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
Vasanthakumar Thiagarajana8302de2009-01-09 18:14:15 +05301538
Kalle Valo520eb822008-12-18 23:35:27 +02001539 del_timer_sync(&local->dynamic_ps_timer);
1540 cancel_work_sync(&local->dynamic_ps_enable_work);
1541
Juuso Oikarinen68542962010-06-09 13:43:26 +03001542 /* Disable ARP filtering */
1543 if (sdata->vif.bss_conf.arp_filter_enabled) {
1544 sdata->vif.bss_conf.arp_filter_enabled = false;
1545 changed |= BSS_CHANGED_ARP_FILTER;
1546 }
1547
Johannes Berg3abead52012-03-02 15:56:59 +01001548 sdata->vif.bss_conf.qos = false;
1549 changed |= BSS_CHANGED_QOS;
1550
Johannes Berg0aaffa92010-05-05 15:28:27 +02001551 /* The BSSID (not really interesting) and HT changed */
1552 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
Johannes Bergae5eb022008-10-14 16:58:37 +02001553 ieee80211_bss_info_change_notify(sdata, changed);
Tomas Winkler8e268e42008-11-25 13:05:44 +02001554
Johannes Berg3abead52012-03-02 15:56:59 +01001555 /* disassociated - set to defaults now */
1556 ieee80211_set_wmm_default(sdata, false);
1557
Johannes Bergb9dcf712010-08-27 12:35:54 +02001558 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1559 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1560 del_timer_sync(&sdata->u.mgd.timer);
1561 del_timer_sync(&sdata->u.mgd.chswitch_timer);
Johannes Berg2d9957c2012-08-01 20:54:52 +02001562
1563 sdata->u.mgd.timers_running = 0;
Johannes Berg028e8da02012-11-26 11:57:41 +01001564
1565 ifmgd->flags = 0;
1566 ieee80211_vif_release_channel(sdata);
Tomas Winkleraa458d12008-09-09 00:32:12 +03001567}
Jiri Bencf0706e82007-05-05 11:45:53 -07001568
Kalle Valo3cf335d2009-03-22 21:57:06 +02001569void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1570 struct ieee80211_hdr *hdr)
1571{
1572 /*
1573 * We can postpone the mgd.timer whenever receiving unicast frames
1574 * from AP because we know that the connection is working both ways
1575 * at that time. But multicast frames (and hence also beacons) must
1576 * be ignored here, because we need to trigger the timer during
Johannes Bergb291ba12009-07-10 15:29:03 +02001577 * data idle periods for sending the periodic probe request to the
1578 * AP we're connected to.
Kalle Valo3cf335d2009-03-22 21:57:06 +02001579 */
Johannes Bergb291ba12009-07-10 15:29:03 +02001580 if (is_multicast_ether_addr(hdr->addr1))
1581 return;
1582
Luis R. Rodriguezbe099e82010-09-16 15:12:29 -04001583 ieee80211_sta_reset_conn_monitor(sdata);
Kalle Valo3cf335d2009-03-22 21:57:06 +02001584}
Jiri Bencf0706e82007-05-05 11:45:53 -07001585
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001586static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1587{
1588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001589 struct ieee80211_local *local = sdata->local;
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001590
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001591 mutex_lock(&local->mtx);
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001592 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001593 IEEE80211_STA_CONNECTION_POLL))) {
1594 mutex_unlock(&local->mtx);
1595 return;
1596 }
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001597
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02001598 __ieee80211_stop_poll(sdata);
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001599
1600 mutex_lock(&local->iflist_mtx);
1601 ieee80211_recalc_ps(local, -1);
1602 mutex_unlock(&local->iflist_mtx);
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001603
1604 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001605 goto out;
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001606
1607 /*
1608 * We've received a probe response, but are not sure whether
1609 * we have or will be receiving any beacons or data, so let's
1610 * schedule the timers again, just in case.
1611 */
1612 ieee80211_sta_reset_beacon_monitor(sdata);
1613
1614 mod_timer(&ifmgd->conn_mon_timer,
1615 round_jiffies_up(jiffies +
1616 IEEE80211_CONNECTION_IDLE_TIME));
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001617out:
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001618 mutex_unlock(&local->mtx);
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001619}
1620
1621void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
Felix Fietkau04ac3c02010-12-02 21:01:08 +01001622 struct ieee80211_hdr *hdr, bool ack)
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001623{
Felix Fietkau75706d02010-12-02 21:01:07 +01001624 if (!ieee80211_is_data(hdr->frame_control))
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001625 return;
1626
Felix Fietkau04ac3c02010-12-02 21:01:08 +01001627 if (ack)
1628 ieee80211_sta_reset_conn_monitor(sdata);
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001629
1630 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1631 sdata->u.mgd.probe_send_count > 0) {
Felix Fietkau04ac3c02010-12-02 21:01:08 +01001632 if (ack)
1633 sdata->u.mgd.probe_send_count = 0;
1634 else
1635 sdata->u.mgd.nullfunc_failed = true;
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001636 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
1637 }
1638}
1639
Maxim Levitskya43abf22009-07-31 18:54:12 +03001640static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
1641{
1642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1643 const u8 *ssid;
Luis R. Rodriguezf01a0672010-09-16 15:12:34 -04001644 u8 *dst = ifmgd->associated->bssid;
Ben Greear180205b2011-02-04 15:30:24 -08001645 u8 unicast_limit = max(1, max_probe_tries - 3);
Luis R. Rodriguezf01a0672010-09-16 15:12:34 -04001646
1647 /*
1648 * Try sending broadcast probe requests for the last three
1649 * probe requests after the first ones failed since some
1650 * buggy APs only support broadcast probe requests.
1651 */
1652 if (ifmgd->probe_send_count >= unicast_limit)
1653 dst = NULL;
Maxim Levitskya43abf22009-07-31 18:54:12 +03001654
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001655 /*
1656 * When the hardware reports an accurate Tx ACK status, it's
1657 * better to send a nullfunc frame instead of a probe request,
1658 * as it will kick us off the AP quickly if we aren't associated
1659 * anymore. The timeout will be reset if the frame is ACKed by
1660 * the AP.
1661 */
Soumik Das992e68b2012-05-20 15:31:13 +05301662 ifmgd->probe_send_count++;
1663
Felix Fietkau04ac3c02010-12-02 21:01:08 +01001664 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
1665 ifmgd->nullfunc_failed = false;
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001666 ieee80211_send_nullfunc(sdata->local, sdata, 0);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01001667 } else {
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02001668 int ssid_len;
1669
Johannes Berg9caf0362012-11-29 01:25:20 +01001670 rcu_read_lock();
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001671 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02001672 if (WARN_ON_ONCE(ssid == NULL))
1673 ssid_len = 0;
1674 else
1675 ssid_len = ssid[1];
1676
1677 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
Johannes Bergfe94fe02012-07-30 12:26:34 +02001678 0, (u32) -1, true, false,
Johannes Berg55de9082012-07-26 17:24:39 +02001679 ifmgd->associated->channel, false);
Johannes Berg9caf0362012-11-29 01:25:20 +01001680 rcu_read_unlock();
Felix Fietkau4e5ff372010-11-23 03:10:31 +01001681 }
Maxim Levitskya43abf22009-07-31 18:54:12 +03001682
Ben Greear180205b2011-02-04 15:30:24 -08001683 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
Maxim Levitskya43abf22009-07-31 18:54:12 +03001684 run_again(ifmgd, ifmgd->probe_timeout);
Rajkumar Manoharanf69b9c72012-03-15 06:15:26 +05301685 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
1686 drv_flush(sdata->local, false);
Maxim Levitskya43abf22009-07-31 18:54:12 +03001687}
1688
Johannes Bergb291ba12009-07-10 15:29:03 +02001689static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
1690 bool beacon)
Kalle Valo04de8382009-03-22 21:57:35 +02001691{
Kalle Valo04de8382009-03-22 21:57:35 +02001692 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +02001693 bool already = false;
Johannes Berg34bfc412009-05-12 19:58:12 +02001694
Johannes Berg9607e6b2009-12-23 13:15:31 +01001695 if (!ieee80211_sdata_running(sdata))
Johannes Berg0e2b6282009-07-13 13:23:39 +02001696 return;
1697
Johannes Berg77fdaa12009-07-07 03:45:17 +02001698 mutex_lock(&ifmgd->mtx);
1699
1700 if (!ifmgd->associated)
1701 goto out;
1702
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001703 mutex_lock(&sdata->local->mtx);
1704
1705 if (sdata->local->tmp_channel || sdata->local->scanning) {
1706 mutex_unlock(&sdata->local->mtx);
1707 goto out;
1708 }
1709
Joe Perchese87cc472012-05-13 21:56:26 +00001710 if (beacon)
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001711 mlme_dbg_ratelimited(sdata,
1712 "detected beacon loss from AP - sending probe request\n");
1713
Holger Schurig6efb71b2012-05-15 15:38:59 +02001714 ieee80211_cqm_rssi_notify(&sdata->vif,
1715 NL80211_CQM_RSSI_BEACON_LOSS_EVENT, GFP_KERNEL);
Kalle Valo04de8382009-03-22 21:57:35 +02001716
Johannes Bergb291ba12009-07-10 15:29:03 +02001717 /*
1718 * The driver/our work has already reported this event or the
1719 * connection monitoring has kicked in and we have already sent
1720 * a probe request. Or maybe the AP died and the driver keeps
1721 * reporting until we disassociate...
1722 *
1723 * In either case we have to ignore the current call to this
1724 * function (except for setting the correct probe reason bit)
1725 * because otherwise we would reset the timer every time and
1726 * never check whether we received a probe response!
1727 */
1728 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1729 IEEE80211_STA_CONNECTION_POLL))
1730 already = true;
1731
1732 if (beacon)
1733 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
1734 else
1735 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
1736
Stanislaw Gruszka133d40f2012-03-28 16:01:19 +02001737 mutex_unlock(&sdata->local->mtx);
1738
Johannes Bergb291ba12009-07-10 15:29:03 +02001739 if (already)
1740 goto out;
1741
Johannes Berg4e751842009-06-10 15:16:52 +02001742 mutex_lock(&sdata->local->iflist_mtx);
1743 ieee80211_recalc_ps(sdata->local, -1);
1744 mutex_unlock(&sdata->local->iflist_mtx);
1745
Maxim Levitskya43abf22009-07-31 18:54:12 +03001746 ifmgd->probe_send_count = 0;
1747 ieee80211_mgd_probe_ap_send(sdata);
Johannes Berg77fdaa12009-07-07 03:45:17 +02001748 out:
1749 mutex_unlock(&ifmgd->mtx);
Kalle Valo04de8382009-03-22 21:57:35 +02001750}
1751
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001752struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
1753 struct ieee80211_vif *vif)
1754{
1755 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1756 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Eliad Pellerd9b3b282012-06-28 15:03:13 +03001757 struct cfg80211_bss *cbss;
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001758 struct sk_buff *skb;
1759 const u8 *ssid;
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02001760 int ssid_len;
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001761
1762 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1763 return NULL;
1764
1765 ASSERT_MGD_MTX(ifmgd);
1766
Eliad Pellerd9b3b282012-06-28 15:03:13 +03001767 if (ifmgd->associated)
1768 cbss = ifmgd->associated;
1769 else if (ifmgd->auth_data)
1770 cbss = ifmgd->auth_data->bss;
1771 else if (ifmgd->assoc_data)
1772 cbss = ifmgd->assoc_data->bss;
1773 else
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001774 return NULL;
1775
Johannes Berg9caf0362012-11-29 01:25:20 +01001776 rcu_read_lock();
Eliad Pellerd9b3b282012-06-28 15:03:13 +03001777 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02001778 if (WARN_ON_ONCE(ssid == NULL))
1779 ssid_len = 0;
1780 else
1781 ssid_len = ssid[1];
1782
Eliad Pellerd9b3b282012-06-28 15:03:13 +03001783 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
Johannes Berg55de9082012-07-26 17:24:39 +02001784 (u32) -1, cbss->channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001785 ssid + 2, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001786 NULL, 0, true);
Johannes Berg9caf0362012-11-29 01:25:20 +01001787 rcu_read_unlock();
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001788
1789 return skb;
1790}
1791EXPORT_SYMBOL(ieee80211_ap_probereq_get);
1792
Johannes Berg882a7c62012-08-01 22:32:45 +02001793static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata,
1794 bool transmit_frame)
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001795{
1796 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1797 struct ieee80211_local *local = sdata->local;
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001798 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001799
1800 mutex_lock(&ifmgd->mtx);
1801 if (!ifmgd->associated) {
1802 mutex_unlock(&ifmgd->mtx);
1803 return;
1804 }
1805
Johannes Berg37ad3882012-02-24 13:50:54 +01001806 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
1807 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
Johannes Berg882a7c62012-08-01 22:32:45 +02001808 transmit_frame, frame_buf);
1809 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001810 mutex_unlock(&ifmgd->mtx);
Johannes Berg7da7cc12010-08-05 17:02:38 +02001811
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001812 /*
1813 * must be outside lock due to cfg80211,
1814 * but that's not a problem.
1815 */
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001816 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
Felix Fietkaufcac4fb2011-11-16 13:34:55 +01001817
1818 mutex_lock(&local->mtx);
1819 ieee80211_recalc_idle(local);
1820 mutex_unlock(&local->mtx);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001821}
1822
Johannes Bergcc74c0c2012-08-01 16:49:34 +02001823static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
Johannes Bergb291ba12009-07-10 15:29:03 +02001824{
1825 struct ieee80211_sub_if_data *sdata =
1826 container_of(work, struct ieee80211_sub_if_data,
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001827 u.mgd.beacon_connection_loss_work);
Paul Stewarta85e1d52011-12-09 11:01:49 -08001828 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1829 struct sta_info *sta;
1830
1831 if (ifmgd->associated) {
Mohammed Shafi Shajakhan30fa9042011-12-27 18:54:07 +05301832 rcu_read_lock();
Paul Stewarta85e1d52011-12-09 11:01:49 -08001833 sta = sta_info_get(sdata, ifmgd->bssid);
1834 if (sta)
1835 sta->beacon_loss_count++;
Mohammed Shafi Shajakhan30fa9042011-12-27 18:54:07 +05301836 rcu_read_unlock();
Paul Stewarta85e1d52011-12-09 11:01:49 -08001837 }
Johannes Bergb291ba12009-07-10 15:29:03 +02001838
Johannes Berg882a7c62012-08-01 22:32:45 +02001839 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) {
1840 sdata_info(sdata, "Connection to AP %pM lost\n",
1841 ifmgd->bssid);
1842 __ieee80211_disconnect(sdata, false);
1843 } else {
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001844 ieee80211_mgd_probe_ap(sdata, true);
Johannes Berg882a7c62012-08-01 22:32:45 +02001845 }
1846}
1847
1848static void ieee80211_csa_connection_drop_work(struct work_struct *work)
1849{
1850 struct ieee80211_sub_if_data *sdata =
1851 container_of(work, struct ieee80211_sub_if_data,
1852 u.mgd.csa_connection_drop_work);
1853
1854 ieee80211_wake_queues_by_reason(&sdata->local->hw,
1855 IEEE80211_QUEUE_STOP_REASON_CSA);
1856 __ieee80211_disconnect(sdata, true);
Johannes Bergb291ba12009-07-10 15:29:03 +02001857}
1858
Kalle Valo04de8382009-03-22 21:57:35 +02001859void ieee80211_beacon_loss(struct ieee80211_vif *vif)
1860{
1861 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001862 struct ieee80211_hw *hw = &sdata->local->hw;
Kalle Valo04de8382009-03-22 21:57:35 +02001863
Johannes Bergb5878a22010-04-07 16:48:40 +02001864 trace_api_beacon_loss(sdata);
1865
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001866 WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
1867 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
Kalle Valo04de8382009-03-22 21:57:35 +02001868}
1869EXPORT_SYMBOL(ieee80211_beacon_loss);
1870
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001871void ieee80211_connection_loss(struct ieee80211_vif *vif)
1872{
1873 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1874 struct ieee80211_hw *hw = &sdata->local->hw;
1875
Johannes Bergb5878a22010-04-07 16:48:40 +02001876 trace_api_connection_loss(sdata);
1877
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02001878 WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
1879 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
1880}
1881EXPORT_SYMBOL(ieee80211_connection_loss);
1882
1883
Johannes Berg66e67e42012-01-20 13:55:27 +01001884static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
1885 bool assoc)
1886{
1887 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1888
1889 lockdep_assert_held(&sdata->u.mgd.mtx);
1890
Johannes Berg66e67e42012-01-20 13:55:27 +01001891 if (!assoc) {
1892 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
1893
1894 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
1895 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
Johannes Berg028e8da02012-11-26 11:57:41 +01001896 sdata->u.mgd.flags = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02001897 ieee80211_vif_release_channel(sdata);
Johannes Berg66e67e42012-01-20 13:55:27 +01001898 }
1899
1900 cfg80211_put_bss(auth_data->bss);
1901 kfree(auth_data);
1902 sdata->u.mgd.auth_data = NULL;
1903}
1904
1905static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
1906 struct ieee80211_mgmt *mgmt, size_t len)
1907{
1908 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
1909 u8 *pos;
1910 struct ieee802_11_elems elems;
1911
1912 pos = mgmt->u.auth.variable;
1913 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
1914 if (!elems.challenge)
1915 return;
1916 auth_data->expected_transaction = 4;
Johannes Berga1845fc2012-06-27 13:18:36 +02001917 drv_mgd_prepare_tx(sdata->local, sdata);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001918 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
Johannes Berg66e67e42012-01-20 13:55:27 +01001919 elems.challenge - 2, elems.challenge_len + 2,
1920 auth_data->bss->bssid, auth_data->bss->bssid,
1921 auth_data->key, auth_data->key_len,
1922 auth_data->key_idx);
1923}
1924
1925static enum rx_mgmt_action __must_check
1926ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
1927 struct ieee80211_mgmt *mgmt, size_t len)
1928{
1929 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1930 u8 bssid[ETH_ALEN];
1931 u16 auth_alg, auth_transaction, status_code;
1932 struct sta_info *sta;
1933
1934 lockdep_assert_held(&ifmgd->mtx);
1935
1936 if (len < 24 + 6)
1937 return RX_MGMT_NONE;
1938
1939 if (!ifmgd->auth_data || ifmgd->auth_data->done)
1940 return RX_MGMT_NONE;
1941
1942 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
1943
Joe Perchesb203ca32012-05-08 18:56:52 +00001944 if (!ether_addr_equal(bssid, mgmt->bssid))
Johannes Berg66e67e42012-01-20 13:55:27 +01001945 return RX_MGMT_NONE;
1946
1947 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
1948 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
1949 status_code = le16_to_cpu(mgmt->u.auth.status_code);
1950
1951 if (auth_alg != ifmgd->auth_data->algorithm ||
Jouni Malinen0f4126e2012-09-30 19:29:38 +03001952 auth_transaction != ifmgd->auth_data->expected_transaction) {
1953 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
1954 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
1955 auth_transaction,
1956 ifmgd->auth_data->expected_transaction);
Johannes Berg66e67e42012-01-20 13:55:27 +01001957 return RX_MGMT_NONE;
Jouni Malinen0f4126e2012-09-30 19:29:38 +03001958 }
Johannes Berg66e67e42012-01-20 13:55:27 +01001959
1960 if (status_code != WLAN_STATUS_SUCCESS) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001961 sdata_info(sdata, "%pM denied authentication (status %d)\n",
1962 mgmt->sa, status_code);
Eliad Pellerdac211e2012-05-13 18:07:04 +03001963 ieee80211_destroy_auth_data(sdata, false);
1964 return RX_MGMT_CFG80211_RX_AUTH;
Johannes Berg66e67e42012-01-20 13:55:27 +01001965 }
1966
1967 switch (ifmgd->auth_data->algorithm) {
1968 case WLAN_AUTH_OPEN:
1969 case WLAN_AUTH_LEAP:
1970 case WLAN_AUTH_FT:
Jouni Malinen6b8ece32012-09-30 19:29:40 +03001971 case WLAN_AUTH_SAE:
Johannes Berg66e67e42012-01-20 13:55:27 +01001972 break;
1973 case WLAN_AUTH_SHARED_KEY:
1974 if (ifmgd->auth_data->expected_transaction != 4) {
1975 ieee80211_auth_challenge(sdata, mgmt, len);
1976 /* need another frame */
1977 return RX_MGMT_NONE;
1978 }
1979 break;
1980 default:
1981 WARN_ONCE(1, "invalid auth alg %d",
1982 ifmgd->auth_data->algorithm);
1983 return RX_MGMT_NONE;
1984 }
1985
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02001986 sdata_info(sdata, "authenticated\n");
Johannes Berg66e67e42012-01-20 13:55:27 +01001987 ifmgd->auth_data->done = true;
1988 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
1989 run_again(ifmgd, ifmgd->auth_data->timeout);
1990
Jouni Malinen6b8ece32012-09-30 19:29:40 +03001991 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
1992 ifmgd->auth_data->expected_transaction != 2) {
1993 /*
1994 * Report auth frame to user space for processing since another
1995 * round of Authentication frames is still needed.
1996 */
1997 return RX_MGMT_CFG80211_RX_AUTH;
1998 }
1999
Johannes Berg66e67e42012-01-20 13:55:27 +01002000 /* move station state to auth */
2001 mutex_lock(&sdata->local->sta_mtx);
2002 sta = sta_info_get(sdata, bssid);
2003 if (!sta) {
2004 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2005 goto out_err;
2006 }
2007 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002008 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
Johannes Berg66e67e42012-01-20 13:55:27 +01002009 goto out_err;
2010 }
2011 mutex_unlock(&sdata->local->sta_mtx);
2012
2013 return RX_MGMT_CFG80211_RX_AUTH;
2014 out_err:
2015 mutex_unlock(&sdata->local->sta_mtx);
2016 /* ignore frame -- wait for timeout */
2017 return RX_MGMT_NONE;
2018}
2019
2020
Johannes Berg77fdaa12009-07-07 03:45:17 +02002021static enum rx_mgmt_action __must_check
2022ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg77fdaa12009-07-07 03:45:17 +02002023 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07002024{
Johannes Berg46900292009-02-15 12:44:28 +01002025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002026 const u8 *bssid = NULL;
Jiri Bencf0706e82007-05-05 11:45:53 -07002027 u16 reason_code;
2028
Johannes Berg66e67e42012-01-20 13:55:27 +01002029 lockdep_assert_held(&ifmgd->mtx);
2030
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002031 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002032 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07002033
Johannes Berg66e67e42012-01-20 13:55:27 +01002034 if (!ifmgd->associated ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002035 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
Johannes Berg66e67e42012-01-20 13:55:27 +01002036 return RX_MGMT_NONE;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002037
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002038 bssid = ifmgd->associated->bssid;
Jiri Bencf0706e82007-05-05 11:45:53 -07002039
2040 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2041
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002042 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2043 bssid, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07002044
Johannes Berg37ad3882012-02-24 13:50:54 +01002045 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2046
Johannes Berg7da7cc12010-08-05 17:02:38 +02002047 mutex_lock(&sdata->local->mtx);
Johannes Berg63f170e2009-12-23 13:15:33 +01002048 ieee80211_recalc_idle(sdata->local);
Johannes Berg7da7cc12010-08-05 17:02:38 +02002049 mutex_unlock(&sdata->local->mtx);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002050
2051 return RX_MGMT_CFG80211_DEAUTH;
Jiri Bencf0706e82007-05-05 11:45:53 -07002052}
2053
2054
Johannes Berg77fdaa12009-07-07 03:45:17 +02002055static enum rx_mgmt_action __must_check
2056ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2057 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07002058{
Johannes Berg46900292009-02-15 12:44:28 +01002059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07002060 u16 reason_code;
2061
Johannes Berg66e67e42012-01-20 13:55:27 +01002062 lockdep_assert_held(&ifmgd->mtx);
2063
Johannes Bergf4ea83d2008-06-30 15:10:46 +02002064 if (len < 24 + 2)
Johannes Berg77fdaa12009-07-07 03:45:17 +02002065 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07002066
Johannes Berg66e67e42012-01-20 13:55:27 +01002067 if (!ifmgd->associated ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002068 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
Johannes Berg77fdaa12009-07-07 03:45:17 +02002069 return RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07002070
2071 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2072
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002073 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2074 mgmt->sa, reason_code);
Jiri Bencf0706e82007-05-05 11:45:53 -07002075
Johannes Berg37ad3882012-02-24 13:50:54 +01002076 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2077
Johannes Berg7da7cc12010-08-05 17:02:38 +02002078 mutex_lock(&sdata->local->mtx);
Johannes Bergbc83b682009-11-29 12:19:06 +01002079 ieee80211_recalc_idle(sdata->local);
Johannes Berg7da7cc12010-08-05 17:02:38 +02002080 mutex_unlock(&sdata->local->mtx);
Johannes Berg37ad3882012-02-24 13:50:54 +01002081
Johannes Berg77fdaa12009-07-07 03:45:17 +02002082 return RX_MGMT_CFG80211_DISASSOC;
Jiri Bencf0706e82007-05-05 11:45:53 -07002083}
2084
Christian Lamparterc74d0842011-10-15 00:14:49 +02002085static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2086 u8 *supp_rates, unsigned int supp_rates_len,
2087 u32 *rates, u32 *basic_rates,
2088 bool *have_higher_than_11mbit,
2089 int *min_rate, int *min_rate_index)
2090{
2091 int i, j;
2092
2093 for (i = 0; i < supp_rates_len; i++) {
2094 int rate = (supp_rates[i] & 0x7f) * 5;
2095 bool is_basic = !!(supp_rates[i] & 0x80);
2096
2097 if (rate > 110)
2098 *have_higher_than_11mbit = true;
2099
2100 /*
2101 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2102 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2103 *
2104 * Note: Even through the membership selector and the basic
2105 * rate flag share the same bit, they are not exactly
2106 * the same.
2107 */
2108 if (!!(supp_rates[i] & 0x80) &&
2109 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2110 continue;
2111
2112 for (j = 0; j < sband->n_bitrates; j++) {
2113 if (sband->bitrates[j].bitrate == rate) {
2114 *rates |= BIT(j);
2115 if (is_basic)
2116 *basic_rates |= BIT(j);
2117 if (rate < *min_rate) {
2118 *min_rate = rate;
2119 *min_rate_index = j;
2120 }
2121 break;
2122 }
2123 }
2124 }
2125}
Jiri Bencf0706e82007-05-05 11:45:53 -07002126
Johannes Berg66e67e42012-01-20 13:55:27 +01002127static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2128 bool assoc)
2129{
2130 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2131
2132 lockdep_assert_held(&sdata->u.mgd.mtx);
2133
Johannes Berg66e67e42012-01-20 13:55:27 +01002134 if (!assoc) {
2135 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2136
2137 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2138 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
Johannes Berg028e8da02012-11-26 11:57:41 +01002139 sdata->u.mgd.flags = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02002140 ieee80211_vif_release_channel(sdata);
Johannes Berg66e67e42012-01-20 13:55:27 +01002141 }
2142
2143 kfree(assoc_data);
2144 sdata->u.mgd.assoc_data = NULL;
2145}
2146
2147static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2148 struct cfg80211_bss *cbss,
Johannes Bergaf6b6372009-12-23 13:15:35 +01002149 struct ieee80211_mgmt *mgmt, size_t len)
Jiri Bencf0706e82007-05-05 11:45:53 -07002150{
Johannes Berg46900292009-02-15 12:44:28 +01002151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg471b3ef2007-12-28 14:32:58 +01002152 struct ieee80211_local *local = sdata->local;
Johannes Berg8318d782008-01-24 19:38:38 +01002153 struct ieee80211_supported_band *sband;
Jiri Bencf0706e82007-05-05 11:45:53 -07002154 struct sta_info *sta;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002155 u8 *pos;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002156 u16 capab_info, aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07002157 struct ieee802_11_elems elems;
Johannes Bergbda39332008-10-11 01:51:51 +02002158 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Johannes Bergae5eb022008-10-14 16:58:37 +02002159 u32 changed = 0;
Christian Lamparterc74d0842011-10-15 00:14:49 +02002160 int err;
Jiri Bencf0706e82007-05-05 11:45:53 -07002161
Johannes Bergaf6b6372009-12-23 13:15:35 +01002162 /* AssocResp and ReassocResp have identical structure */
Jiri Bencf0706e82007-05-05 11:45:53 -07002163
Jiri Bencf0706e82007-05-05 11:45:53 -07002164 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002165 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
Jiri Bencf0706e82007-05-05 11:45:53 -07002166
Johannes Berg1dd84aa2007-10-10 12:03:41 +02002167 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002168 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2169 aid);
Johannes Berg1dd84aa2007-10-10 12:03:41 +02002170 aid &= ~(BIT(15) | BIT(14));
2171
Johannes Berg05cb9102011-10-28 11:59:47 +02002172 ifmgd->broken_ap = false;
2173
2174 if (aid == 0 || aid > IEEE80211_MAX_AID) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002175 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2176 aid);
Johannes Berg05cb9102011-10-28 11:59:47 +02002177 aid = 0;
2178 ifmgd->broken_ap = true;
2179 }
2180
Johannes Bergaf6b6372009-12-23 13:15:35 +01002181 pos = mgmt->u.assoc_resp.variable;
2182 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2183
Jiri Bencf0706e82007-05-05 11:45:53 -07002184 if (!elems.supp_rates) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002185 sdata_info(sdata, "no SuppRates element in AssocResp\n");
Johannes Bergaf6b6372009-12-23 13:15:35 +01002186 return false;
Jiri Bencf0706e82007-05-05 11:45:53 -07002187 }
2188
Johannes Berg46900292009-02-15 12:44:28 +01002189 ifmgd->aid = aid;
Jiri Bencf0706e82007-05-05 11:45:53 -07002190
Guy Eilam2a33bee2011-08-17 15:18:15 +03002191 mutex_lock(&sdata->local->sta_mtx);
2192 /*
2193 * station info was already allocated and inserted before
2194 * the association and should be available to us
2195 */
Johannes Berg7852e362012-01-20 13:55:24 +01002196 sta = sta_info_get(sdata, cbss->bssid);
Guy Eilam2a33bee2011-08-17 15:18:15 +03002197 if (WARN_ON(!sta)) {
2198 mutex_unlock(&sdata->local->sta_mtx);
Johannes Bergaf6b6372009-12-23 13:15:35 +01002199 return false;
Jiri Bencf0706e82007-05-05 11:45:53 -07002200 }
2201
Johannes Berg55de9082012-07-26 17:24:39 +02002202 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
Johannes Berg8318d782008-01-24 19:38:38 +01002203
Johannes Berga8243b72012-11-22 14:32:09 +01002204 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
Ben Greearef96a8422011-11-18 11:32:00 -08002205 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
Johannes Bergd9fe60d2008-10-09 12:13:49 +02002206 elems.ht_cap_elem, &sta->sta.ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +02002207
Johannes Berg64f68e52012-03-28 10:58:37 +02002208 sta->supports_40mhz =
2209 sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2210
Mahesh Palivela818255e2012-10-10 11:33:04 +00002211 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2212 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2213 elems.vht_cap_elem,
2214 &sta->sta.vht_cap);
2215
Johannes Berg4b7679a2008-09-18 18:14:18 +02002216 rate_control_rate_init(sta);
Jiri Bencf0706e82007-05-05 11:45:53 -07002217
Johannes Berg46900292009-02-15 12:44:28 +01002218 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002219 set_sta_flag(sta, WLAN_STA_MFP);
Jouni Malinen5394af42009-01-08 13:31:59 +02002220
Johannes Bergddf4ac52008-10-22 11:41:38 +02002221 if (elems.wmm_param)
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002222 set_sta_flag(sta, WLAN_STA_WME);
Johannes Bergddf4ac52008-10-22 11:41:38 +02002223
Johannes Bergc8987872012-01-20 13:55:17 +01002224 err = sta_info_move_state(sta, IEEE80211_STA_AUTH);
2225 if (!err)
2226 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2227 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2228 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2229 if (err) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002230 sdata_info(sdata,
2231 "failed to move station %pM to desired state\n",
2232 sta->sta.addr);
Johannes Bergc8987872012-01-20 13:55:17 +01002233 WARN_ON(__sta_info_destroy(sta));
2234 mutex_unlock(&sdata->local->sta_mtx);
2235 return false;
2236 }
2237
Johannes Berg7852e362012-01-20 13:55:24 +01002238 mutex_unlock(&sdata->local->sta_mtx);
Johannes Bergddf4ac52008-10-22 11:41:38 +02002239
Juuso Oikarinenf2176d72010-09-28 14:39:32 +03002240 /*
2241 * Always handle WMM once after association regardless
2242 * of the first value the AP uses. Setting -1 here has
2243 * that effect because the AP values is an unsigned
2244 * 4-bit value.
2245 */
2246 ifmgd->wmm_last_param_set = -1;
2247
Johannes Bergddf4ac52008-10-22 11:41:38 +02002248 if (elems.wmm_param)
Johannes Berg4ced3f72010-07-19 16:39:04 +02002249 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
Jiri Bencf0706e82007-05-05 11:45:53 -07002250 elems.wmm_param_len);
Johannes Bergaa837e12009-05-07 16:16:24 +02002251 else
Johannes Berg3abead52012-03-02 15:56:59 +01002252 ieee80211_set_wmm_default(sdata, false);
2253 changed |= BSS_CHANGED_QOS;
Jiri Bencf0706e82007-05-05 11:45:53 -07002254
Johannes Berg074d46d2012-03-15 19:45:16 +01002255 if (elems.ht_operation && elems.wmm_param &&
Johannes Berga8243b72012-11-22 14:32:09 +01002256 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
Johannes Berg24398e32012-03-28 10:58:36 +02002257 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2258 cbss->bssid, false);
Johannes Bergae5eb022008-10-14 16:58:37 +02002259
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07002260 /* set AID and assoc capability,
2261 * ieee80211_set_associated() will tell the driver */
Johannes Berg8318d782008-01-24 19:38:38 +01002262 bss_conf->aid = aid;
Tomas Winkler21c0cbe2008-03-28 16:33:34 -07002263 bss_conf->assoc_capability = capab_info;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002264 ieee80211_set_associated(sdata, cbss, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07002265
Kalle Valo15b7b062009-03-22 21:57:14 +02002266 /*
Felix Fietkaud5242152010-01-08 18:06:26 +01002267 * If we're using 4-addr mode, let the AP know that we're
2268 * doing so, so that it can create the STA VLAN on its side
2269 */
2270 if (ifmgd->use_4addr)
2271 ieee80211_send_4addr_nullfunc(local, sdata);
2272
2273 /*
Johannes Bergb291ba12009-07-10 15:29:03 +02002274 * Start timer to probe the connection to the AP now.
2275 * Also start the timer that will detect beacon loss.
Kalle Valo15b7b062009-03-22 21:57:14 +02002276 */
Johannes Bergb291ba12009-07-10 15:29:03 +02002277 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
Luis R. Rodriguezd3a910a2010-09-16 15:12:32 -04002278 ieee80211_sta_reset_beacon_monitor(sdata);
Kalle Valo15b7b062009-03-22 21:57:14 +02002279
Johannes Bergaf6b6372009-12-23 13:15:35 +01002280 return true;
Jiri Bencf0706e82007-05-05 11:45:53 -07002281}
2282
Johannes Berg66e67e42012-01-20 13:55:27 +01002283static enum rx_mgmt_action __must_check
2284ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2285 struct ieee80211_mgmt *mgmt, size_t len,
2286 struct cfg80211_bss **bss)
2287{
2288 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2289 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2290 u16 capab_info, status_code, aid;
2291 struct ieee802_11_elems elems;
2292 u8 *pos;
2293 bool reassoc;
Jiri Bencf0706e82007-05-05 11:45:53 -07002294
Johannes Berg66e67e42012-01-20 13:55:27 +01002295 lockdep_assert_held(&ifmgd->mtx);
2296
2297 if (!assoc_data)
2298 return RX_MGMT_NONE;
Joe Perchesb203ca32012-05-08 18:56:52 +00002299 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
Johannes Berg66e67e42012-01-20 13:55:27 +01002300 return RX_MGMT_NONE;
2301
2302 /*
2303 * AssocResp and ReassocResp have identical structure, so process both
2304 * of them in this function.
2305 */
2306
2307 if (len < 24 + 6)
2308 return RX_MGMT_NONE;
2309
2310 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2311 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2312 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2313 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2314
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002315 sdata_info(sdata,
2316 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2317 reassoc ? "Rea" : "A", mgmt->sa,
2318 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
Johannes Berg66e67e42012-01-20 13:55:27 +01002319
2320 pos = mgmt->u.assoc_resp.variable;
2321 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems);
2322
2323 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2324 elems.timeout_int && elems.timeout_int_len == 5 &&
2325 elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2326 u32 tu, ms;
2327 tu = get_unaligned_le32(elems.timeout_int + 1);
2328 ms = tu * 1024 / 1000;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002329 sdata_info(sdata,
2330 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2331 mgmt->sa, tu, ms);
Johannes Berg66e67e42012-01-20 13:55:27 +01002332 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2333 if (ms > IEEE80211_ASSOC_TIMEOUT)
2334 run_again(ifmgd, assoc_data->timeout);
2335 return RX_MGMT_NONE;
2336 }
2337
2338 *bss = assoc_data->bss;
2339
2340 if (status_code != WLAN_STATUS_SUCCESS) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002341 sdata_info(sdata, "%pM denied association (code=%d)\n",
2342 mgmt->sa, status_code);
Johannes Berg66e67e42012-01-20 13:55:27 +01002343 ieee80211_destroy_assoc_data(sdata, false);
2344 } else {
Johannes Berg66e67e42012-01-20 13:55:27 +01002345 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2346 /* oops -- internal error -- send timeout for now */
Eliad Peller10a91092012-07-02 14:42:03 +03002347 ieee80211_destroy_assoc_data(sdata, false);
Johannes Berg66e67e42012-01-20 13:55:27 +01002348 cfg80211_put_bss(*bss);
2349 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2350 }
John W. Linville635d9992012-07-09 16:34:34 -04002351 sdata_info(sdata, "associated\n");
Johannes Berg79ebfb82012-02-20 14:19:58 +01002352
2353 /*
2354 * destroy assoc_data afterwards, as otherwise an idle
2355 * recalc after assoc_data is NULL but before associated
2356 * is set can cause the interface to go idle
2357 */
2358 ieee80211_destroy_assoc_data(sdata, true);
Johannes Berg66e67e42012-01-20 13:55:27 +01002359 }
2360
2361 return RX_MGMT_CFG80211_RX_ASSOC;
2362}
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002363static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002364 struct ieee80211_mgmt *mgmt,
2365 size_t len,
2366 struct ieee80211_rx_status *rx_status,
Johannes Berg98c8fcc2008-09-08 17:44:26 +02002367 struct ieee802_11_elems *elems,
2368 bool beacon)
Jiri Bencf0706e82007-05-05 11:45:53 -07002369{
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002370 struct ieee80211_local *local = sdata->local;
Johannes Berg98c8fcc2008-09-08 17:44:26 +02002371 int freq;
Johannes Bergc2b13452008-09-11 00:01:55 +02002372 struct ieee80211_bss *bss;
Johannes Bergfab7d4a2008-03-16 18:42:44 +01002373 struct ieee80211_channel *channel;
Johannes Berg56007a02010-01-26 14:19:52 +01002374 bool need_ps = false;
2375
Johannes Berg66e67e42012-01-20 13:55:27 +01002376 if (sdata->u.mgd.associated &&
Joe Perchesb203ca32012-05-08 18:56:52 +00002377 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) {
Johannes Berg56007a02010-01-26 14:19:52 +01002378 bss = (void *)sdata->u.mgd.associated->priv;
2379 /* not previously set so we may need to recalc */
2380 need_ps = !bss->dtim_period;
2381 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002382
Johannes Berg5bda6172008-09-08 11:05:10 +02002383 if (elems->ds_params && elems->ds_params_len == 1)
Bruno Randolf59eb21a2011-01-17 13:37:28 +09002384 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2385 rx_status->band);
Johannes Berg5bda6172008-09-08 11:05:10 +02002386 else
2387 freq = rx_status->freq;
2388
2389 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2390
2391 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2392 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002393
Johannes Berg98c8fcc2008-09-08 17:44:26 +02002394 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
Johannes Berg2a519312009-02-10 21:25:55 +01002395 channel, beacon);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002396 if (bss)
2397 ieee80211_rx_bss_put(local, bss);
2398
2399 if (!sdata->u.mgd.associated)
Johannes Berg98c8fcc2008-09-08 17:44:26 +02002400 return;
Jiri Bencf0706e82007-05-05 11:45:53 -07002401
Johannes Berg56007a02010-01-26 14:19:52 +01002402 if (need_ps) {
2403 mutex_lock(&local->iflist_mtx);
2404 ieee80211_recalc_ps(local, -1);
2405 mutex_unlock(&local->iflist_mtx);
2406 }
2407
Johannes Berg5bc14202012-08-01 16:13:02 +02002408 if (elems->ch_switch_ie &&
2409 memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid, ETH_ALEN) == 0)
2410 ieee80211_sta_process_chanswitch(sdata, elems->ch_switch_ie,
Johannes Berg5ce6e432010-05-11 16:20:57 +02002411 bss, rx_status->mactime);
Jiri Bencf0706e82007-05-05 11:45:53 -07002412}
2413
2414
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002415static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
Johannes Bergaf6b6372009-12-23 13:15:35 +01002416 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07002417{
Johannes Bergaf6b6372009-12-23 13:15:35 +01002418 struct ieee80211_mgmt *mgmt = (void *)skb->data;
Kalle Valo15b7b062009-03-22 21:57:14 +02002419 struct ieee80211_if_managed *ifmgd;
Johannes Bergaf6b6372009-12-23 13:15:35 +01002420 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2421 size_t baselen, len = skb->len;
Ester Kummerae6a44e2008-06-27 18:54:48 +03002422 struct ieee802_11_elems elems;
2423
Kalle Valo15b7b062009-03-22 21:57:14 +02002424 ifmgd = &sdata->u.mgd;
2425
Johannes Berg77fdaa12009-07-07 03:45:17 +02002426 ASSERT_MGD_MTX(ifmgd);
2427
Joe Perchesb203ca32012-05-08 18:56:52 +00002428 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
Tomas Winkler8e7cdbb2008-08-03 14:32:01 +03002429 return; /* ignore ProbeResp to foreign address */
2430
Ester Kummerae6a44e2008-06-27 18:54:48 +03002431 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2432 if (baselen > len)
2433 return;
2434
2435 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2436 &elems);
2437
Johannes Berg98c8fcc2008-09-08 17:44:26 +02002438 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
Ron Rindjunsky9859b812008-08-09 03:02:19 +03002439
Johannes Berg77fdaa12009-07-07 03:45:17 +02002440 if (ifmgd->associated &&
Joe Perchesb203ca32012-05-08 18:56:52 +00002441 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
Felix Fietkau4e5ff372010-11-23 03:10:31 +01002442 ieee80211_reset_ap_probe(sdata);
Johannes Berg66e67e42012-01-20 13:55:27 +01002443
2444 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
Joe Perchesb203ca32012-05-08 18:56:52 +00002445 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
Johannes Berg66e67e42012-01-20 13:55:27 +01002446 /* got probe response, continue with auth */
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002447 sdata_info(sdata, "direct probe responded\n");
Johannes Berg66e67e42012-01-20 13:55:27 +01002448 ifmgd->auth_data->tries = 0;
2449 ifmgd->auth_data->timeout = jiffies;
2450 run_again(ifmgd, ifmgd->auth_data->timeout);
2451 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002452}
2453
Johannes Bergd91f36d2009-04-16 13:17:26 +02002454/*
2455 * This is the canonical list of information elements we care about,
2456 * the filter code also gives us all changes to the Microsoft OUI
2457 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2458 *
2459 * We implement beacon filtering in software since that means we can
2460 * avoid processing the frame here and in cfg80211, and userspace
2461 * will not be able to tell whether the hardware supports it or not.
2462 *
2463 * XXX: This list needs to be dynamic -- userspace needs to be able to
2464 * add items it requires. It also needs to be able to tell us to
2465 * look out for other vendor IEs.
2466 */
2467static const u64 care_about_ies =
Johannes Berg1d4df3a2009-04-22 11:25:43 +02002468 (1ULL << WLAN_EID_COUNTRY) |
2469 (1ULL << WLAN_EID_ERP_INFO) |
2470 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2471 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2472 (1ULL << WLAN_EID_HT_CAPABILITY) |
Johannes Berg074d46d2012-03-15 19:45:16 +01002473 (1ULL << WLAN_EID_HT_OPERATION);
Johannes Bergd91f36d2009-04-16 13:17:26 +02002474
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002475static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
Jiri Bencf0706e82007-05-05 11:45:53 -07002476 struct ieee80211_mgmt *mgmt,
2477 size_t len,
2478 struct ieee80211_rx_status *rx_status)
2479{
Johannes Bergd91f36d2009-04-16 13:17:26 +02002480 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002481 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
Jiri Bencf0706e82007-05-05 11:45:53 -07002482 size_t baselen;
2483 struct ieee802_11_elems elems;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002484 struct ieee80211_local *local = sdata->local;
Johannes Berg55de9082012-07-26 17:24:39 +02002485 struct ieee80211_chanctx_conf *chanctx_conf;
2486 struct ieee80211_channel *chan;
Johannes Berg471b3ef2007-12-28 14:32:58 +01002487 u32 changed = 0;
Rami Rosenf87ad632012-10-25 10:16:23 +02002488 bool erp_valid;
Johannes Berg7a5158e2008-10-08 10:59:33 +02002489 u8 erp_value = 0;
Johannes Bergd91f36d2009-04-16 13:17:26 +02002490 u32 ncrc;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002491 u8 *bssid;
2492
Johannes Berg66e67e42012-01-20 13:55:27 +01002493 lockdep_assert_held(&ifmgd->mtx);
Jiri Bencf0706e82007-05-05 11:45:53 -07002494
Ester Kummerae6a44e2008-06-27 18:54:48 +03002495 /* Process beacon from the current BSS */
2496 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2497 if (baselen > len)
2498 return;
2499
Johannes Berg55de9082012-07-26 17:24:39 +02002500 rcu_read_lock();
2501 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2502 if (!chanctx_conf) {
2503 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07002504 return;
Johannes Berg55de9082012-07-26 17:24:39 +02002505 }
2506
Johannes Berg4bf88532012-11-09 11:39:59 +01002507 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
Johannes Berg55de9082012-07-26 17:24:39 +02002508 rcu_read_unlock();
2509 return;
2510 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002511 chan = chanctx_conf->def.chan;
Johannes Berg55de9082012-07-26 17:24:39 +02002512 rcu_read_unlock();
Jiri Bencf0706e82007-05-05 11:45:53 -07002513
Johannes Berg66e67e42012-01-20 13:55:27 +01002514 if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
Joe Perchesb203ca32012-05-08 18:56:52 +00002515 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
Johannes Berg66e67e42012-01-20 13:55:27 +01002516 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2517 len - baselen, &elems);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002518
Johannes Berg66e67e42012-01-20 13:55:27 +01002519 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2520 false);
2521 ifmgd->assoc_data->have_beacon = true;
2522 ifmgd->assoc_data->sent_assoc = false;
2523 /* continue assoc process */
2524 ifmgd->assoc_data->timeout = jiffies;
2525 run_again(ifmgd, ifmgd->assoc_data->timeout);
2526 return;
2527 }
2528
2529 if (!ifmgd->associated ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002530 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
Johannes Berg66e67e42012-01-20 13:55:27 +01002531 return;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002532 bssid = ifmgd->associated->bssid;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002533
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002534 /* Track average RSSI from the Beacon frames of the current AP */
2535 ifmgd->last_beacon_signal = rx_status->signal;
2536 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2537 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
Jouni Malinen3ba06c62010-08-27 22:21:13 +03002538 ifmgd->ave_beacon_signal = rx_status->signal * 16;
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002539 ifmgd->last_cqm_event_signal = 0;
Jouni Malinen391a2002010-08-27 22:22:00 +03002540 ifmgd->count_beacon_signal = 1;
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07002541 ifmgd->last_ave_beacon_signal = 0;
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002542 } else {
2543 ifmgd->ave_beacon_signal =
2544 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2545 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2546 ifmgd->ave_beacon_signal) / 16;
Jouni Malinen391a2002010-08-27 22:22:00 +03002547 ifmgd->count_beacon_signal++;
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002548 }
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07002549
2550 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2551 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2552 int sig = ifmgd->ave_beacon_signal;
2553 int last_sig = ifmgd->last_ave_beacon_signal;
2554
2555 /*
2556 * if signal crosses either of the boundaries, invoke callback
2557 * with appropriate parameters
2558 */
2559 if (sig > ifmgd->rssi_max_thold &&
2560 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2561 ifmgd->last_ave_beacon_signal = sig;
2562 drv_rssi_callback(local, RSSI_EVENT_HIGH);
2563 } else if (sig < ifmgd->rssi_min_thold &&
2564 (last_sig >= ifmgd->rssi_max_thold ||
2565 last_sig == 0)) {
2566 ifmgd->last_ave_beacon_signal = sig;
2567 drv_rssi_callback(local, RSSI_EVENT_LOW);
2568 }
2569 }
2570
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002571 if (bss_conf->cqm_rssi_thold &&
Jouni Malinen391a2002010-08-27 22:22:00 +03002572 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
Johannes Bergea086352012-01-19 09:29:58 +01002573 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
Jouni Malinen17e4ec12010-03-29 23:28:30 -07002574 int sig = ifmgd->ave_beacon_signal / 16;
2575 int last_event = ifmgd->last_cqm_event_signal;
2576 int thold = bss_conf->cqm_rssi_thold;
2577 int hyst = bss_conf->cqm_rssi_hyst;
2578 if (sig < thold &&
2579 (last_event == 0 || sig < last_event - hyst)) {
2580 ifmgd->last_cqm_event_signal = sig;
2581 ieee80211_cqm_rssi_notify(
2582 &sdata->vif,
2583 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
2584 GFP_KERNEL);
2585 } else if (sig > thold &&
2586 (last_event == 0 || sig > last_event + hyst)) {
2587 ifmgd->last_cqm_event_signal = sig;
2588 ieee80211_cqm_rssi_notify(
2589 &sdata->vif,
2590 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
2591 GFP_KERNEL);
2592 }
2593 }
2594
Johannes Bergb291ba12009-07-10 15:29:03 +02002595 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002596 mlme_dbg_ratelimited(sdata,
2597 "cancelling probereq poll due to a received beacon\n");
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02002598 mutex_lock(&local->mtx);
Johannes Bergb291ba12009-07-10 15:29:03 +02002599 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02002600 ieee80211_run_deferred_scan(local);
2601 mutex_unlock(&local->mtx);
2602
Johannes Berg4e751842009-06-10 15:16:52 +02002603 mutex_lock(&local->iflist_mtx);
2604 ieee80211_recalc_ps(local, -1);
2605 mutex_unlock(&local->iflist_mtx);
Jouni Malinen92778182009-05-14 21:15:36 +03002606 }
2607
Johannes Bergb291ba12009-07-10 15:29:03 +02002608 /*
2609 * Push the beacon loss detection into the future since
2610 * we are processing a beacon from the AP just now.
2611 */
Luis R. Rodriguezd3a910a2010-09-16 15:12:32 -04002612 ieee80211_sta_reset_beacon_monitor(sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02002613
Johannes Bergd91f36d2009-04-16 13:17:26 +02002614 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
2615 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
2616 len - baselen, &elems,
2617 care_about_ies, ncrc);
2618
Vivek Natarajan25c9c872009-03-02 20:20:30 +05302619 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
Rami Rosenf87ad632012-10-25 10:16:23 +02002620 bool directed_tim = ieee80211_check_tim(elems.tim,
2621 elems.tim_len,
2622 ifmgd->aid);
Kalle Valo1fb36062009-02-10 17:09:24 +02002623 if (directed_tim) {
Kalle Valo572e0012009-02-10 17:09:31 +02002624 if (local->hw.conf.dynamic_ps_timeout > 0) {
Ronald Wahl70b12f22012-03-19 14:37:20 +01002625 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
2626 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
2627 ieee80211_hw_config(local,
2628 IEEE80211_CONF_CHANGE_PS);
2629 }
Kalle Valo572e0012009-02-10 17:09:31 +02002630 ieee80211_send_nullfunc(local, sdata, 0);
Rajkumar Manoharan6f0756a2012-03-15 05:50:36 +05302631 } else if (!local->pspolling && sdata->u.mgd.powersave) {
Kalle Valo572e0012009-02-10 17:09:31 +02002632 local->pspolling = true;
2633
2634 /*
2635 * Here is assumed that the driver will be
2636 * able to send ps-poll frame and receive a
2637 * response even though power save mode is
2638 * enabled, but some drivers might require
2639 * to disable power save here. This needs
2640 * to be investigated.
2641 */
2642 ieee80211_send_pspoll(local, sdata);
2643 }
Vivek Natarajana97b77b2008-12-23 18:39:02 -08002644 }
2645 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02002646
Johannes Berg488dd7b2012-10-29 20:08:01 +01002647 if (sdata->vif.p2p) {
2648 u8 noa[2];
2649 int ret;
2650
2651 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
2652 len - baselen,
2653 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
2654 noa, sizeof(noa));
2655 if (ret >= 2 && sdata->u.mgd.p2p_noa_index != noa[0]) {
2656 bss_conf->p2p_oppps = noa[1] & 0x80;
2657 bss_conf->p2p_ctwindow = noa[1] & 0x7f;
2658 changed |= BSS_CHANGED_P2P_PS;
2659 sdata->u.mgd.p2p_noa_index = noa[0];
2660 /*
2661 * make sure we update all information, the CRC
2662 * mechanism doesn't look at P2P attributes.
2663 */
2664 ifmgd->beacon_crc_valid = false;
2665 }
2666 }
2667
Juuso Oikarinend8ec4432010-10-01 16:02:31 +03002668 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
Jouni Malinen30196672009-05-19 17:01:43 +03002669 return;
2670 ifmgd->beacon_crc = ncrc;
Juuso Oikarinend8ec4432010-10-01 16:02:31 +03002671 ifmgd->beacon_crc_valid = true;
Jouni Malinen30196672009-05-19 17:01:43 +03002672
Johannes Berg7d257452012-07-06 17:37:43 +02002673 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems,
2674 true);
2675
2676 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2677 elems.wmm_param_len))
2678 changed |= BSS_CHANGED_QOS;
2679
Johannes Berg7a5158e2008-10-08 10:59:33 +02002680 if (elems.erp_info && elems.erp_info_len >= 1) {
2681 erp_valid = true;
2682 erp_value = elems.erp_info[0];
2683 } else {
2684 erp_valid = false;
John W. Linville50c4afb2008-04-15 14:09:27 -04002685 }
Johannes Berg7a5158e2008-10-08 10:59:33 +02002686 changed |= ieee80211_handle_bss_capability(sdata,
2687 le16_to_cpu(mgmt->u.beacon.capab_info),
2688 erp_valid, erp_value);
Jiri Bencf0706e82007-05-05 11:45:53 -07002689
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002690
Johannes Berg074d46d2012-03-15 19:45:16 +01002691 if (elems.ht_cap_elem && elems.ht_operation && elems.wmm_param &&
Johannes Berga8243b72012-11-22 14:32:09 +01002692 !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
Johannes Berg24398e32012-03-28 10:58:36 +02002693 changed |= ieee80211_config_ht_tx(sdata, elems.ht_operation,
2694 bssid, true);
Ron Rindjunskyd3c990f2007-11-26 16:14:34 +02002695
Johannes Berg04b7b2f2012-09-05 13:41:37 +02002696 if (elems.country_elem && elems.pwr_constr_elem &&
2697 mgmt->u.probe_resp.capab_info &
2698 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02002699 changed |= ieee80211_handle_pwr_constr(sdata, chan,
2700 elems.country_elem,
2701 elems.country_elem_len,
2702 elems.pwr_constr_elem);
Luis R. Rodriguez3f2355c2008-11-12 14:22:02 -08002703
Johannes Berg471b3ef2007-12-28 14:32:58 +01002704 ieee80211_bss_info_change_notify(sdata, changed);
Jiri Bencf0706e82007-05-05 11:45:53 -07002705}
2706
Johannes Berg1fa57d02010-06-10 10:21:32 +02002707void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
2708 struct sk_buff *skb)
Jiri Bencf0706e82007-05-05 11:45:53 -07002709{
Johannes Berg77fdaa12009-07-07 03:45:17 +02002710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jiri Bencf0706e82007-05-05 11:45:53 -07002711 struct ieee80211_rx_status *rx_status;
Jiri Bencf0706e82007-05-05 11:45:53 -07002712 struct ieee80211_mgmt *mgmt;
Johannes Berg66e67e42012-01-20 13:55:27 +01002713 struct cfg80211_bss *bss = NULL;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002714 enum rx_mgmt_action rma = RX_MGMT_NONE;
Jiri Bencf0706e82007-05-05 11:45:53 -07002715 u16 fc;
2716
Jiri Bencf0706e82007-05-05 11:45:53 -07002717 rx_status = (struct ieee80211_rx_status *) skb->cb;
2718 mgmt = (struct ieee80211_mgmt *) skb->data;
2719 fc = le16_to_cpu(mgmt->frame_control);
2720
Johannes Berg77fdaa12009-07-07 03:45:17 +02002721 mutex_lock(&ifmgd->mtx);
2722
Johannes Berg66e67e42012-01-20 13:55:27 +01002723 switch (fc & IEEE80211_FCTL_STYPE) {
2724 case IEEE80211_STYPE_BEACON:
2725 ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
2726 break;
2727 case IEEE80211_STYPE_PROBE_RESP:
2728 ieee80211_rx_mgmt_probe_resp(sdata, skb);
2729 break;
2730 case IEEE80211_STYPE_AUTH:
2731 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
2732 break;
2733 case IEEE80211_STYPE_DEAUTH:
2734 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
2735 break;
2736 case IEEE80211_STYPE_DISASSOC:
2737 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
2738 break;
2739 case IEEE80211_STYPE_ASSOC_RESP:
2740 case IEEE80211_STYPE_REASSOC_RESP:
2741 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
2742 break;
2743 case IEEE80211_STYPE_ACTION:
2744 switch (mgmt->u.action.category) {
2745 case WLAN_CATEGORY_SPECTRUM_MGMT:
2746 ieee80211_sta_process_chanswitch(sdata,
2747 &mgmt->u.action.u.chan_switch.sw_elem,
2748 (void *)ifmgd->associated->priv,
2749 rx_status->mactime);
Johannes Berg77fdaa12009-07-07 03:45:17 +02002750 break;
Johannes Berg77fdaa12009-07-07 03:45:17 +02002751 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02002752 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02002753 mutex_unlock(&ifmgd->mtx);
2754
Johannes Berg66e67e42012-01-20 13:55:27 +01002755 switch (rma) {
2756 case RX_MGMT_NONE:
2757 /* no action */
2758 break;
2759 case RX_MGMT_CFG80211_DEAUTH:
Holger Schurigce470612009-10-13 13:28:13 +02002760 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
Johannes Berg66e67e42012-01-20 13:55:27 +01002761 break;
2762 case RX_MGMT_CFG80211_DISASSOC:
2763 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
2764 break;
2765 case RX_MGMT_CFG80211_RX_AUTH:
2766 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
2767 break;
2768 case RX_MGMT_CFG80211_RX_ASSOC:
2769 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
2770 break;
2771 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
2772 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
2773 break;
2774 default:
2775 WARN(1, "unexpected: %d", rma);
Johannes Bergb054b742010-06-07 21:50:07 +02002776 }
Jiri Bencf0706e82007-05-05 11:45:53 -07002777}
2778
Johannes Berg9c6bd792008-09-11 00:01:52 +02002779static void ieee80211_sta_timer(unsigned long data)
Jiri Bencf0706e82007-05-05 11:45:53 -07002780{
2781 struct ieee80211_sub_if_data *sdata =
2782 (struct ieee80211_sub_if_data *) data;
Johannes Berg46900292009-02-15 12:44:28 +01002783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jasper Bryant-Greenef698d852008-08-03 12:04:37 +12002784 struct ieee80211_local *local = sdata->local;
Jiri Bencf0706e82007-05-05 11:45:53 -07002785
Johannes Berg5bb644a2009-05-17 11:40:42 +02002786 if (local->quiescing) {
2787 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
2788 return;
2789 }
2790
Johannes Berg64592c82010-06-10 10:21:31 +02002791 ieee80211_queue_work(&local->hw, &sdata->work);
Jiri Bencf0706e82007-05-05 11:45:53 -07002792}
2793
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002794static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
Johannes Berg95acac62011-07-12 12:30:59 +02002795 u8 *bssid, u8 reason)
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002796{
2797 struct ieee80211_local *local = sdata->local;
2798 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Antonio Quartulli6ae16772012-09-07 13:28:52 +02002799 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002800
Johannes Berg37ad3882012-02-24 13:50:54 +01002801 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
2802 false, frame_buf);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002803 mutex_unlock(&ifmgd->mtx);
Johannes Berg37ad3882012-02-24 13:50:54 +01002804
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002805 /*
2806 * must be outside lock due to cfg80211,
2807 * but that's not a problem.
2808 */
Antonio Quartulli6ae16772012-09-07 13:28:52 +02002809 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
Felix Fietkaufcac4fb2011-11-16 13:34:55 +01002810
2811 mutex_lock(&local->mtx);
2812 ieee80211_recalc_idle(local);
2813 mutex_unlock(&local->mtx);
2814
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002815 mutex_lock(&ifmgd->mtx);
2816}
2817
Johannes Berg66e67e42012-01-20 13:55:27 +01002818static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
2819{
2820 struct ieee80211_local *local = sdata->local;
2821 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2822 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
2823
2824 lockdep_assert_held(&ifmgd->mtx);
2825
2826 if (WARN_ON_ONCE(!auth_data))
2827 return -EINVAL;
2828
Johannes Berg66e67e42012-01-20 13:55:27 +01002829 auth_data->tries++;
2830
2831 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002832 sdata_info(sdata, "authentication with %pM timed out\n",
2833 auth_data->bss->bssid);
Johannes Berg66e67e42012-01-20 13:55:27 +01002834
2835 /*
2836 * Most likely AP is not in the range so remove the
2837 * bss struct for that AP.
2838 */
2839 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
2840
2841 return -ETIMEDOUT;
2842 }
2843
Johannes Berga1845fc2012-06-27 13:18:36 +02002844 drv_mgd_prepare_tx(local, sdata);
2845
Johannes Berg66e67e42012-01-20 13:55:27 +01002846 if (auth_data->bss->proberesp_ies) {
Jouni Malinen6b8ece32012-09-30 19:29:40 +03002847 u16 trans = 1;
2848 u16 status = 0;
2849
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002850 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
2851 auth_data->bss->bssid, auth_data->tries,
2852 IEEE80211_AUTH_MAX_TRIES);
Johannes Berg66e67e42012-01-20 13:55:27 +01002853
2854 auth_data->expected_transaction = 2;
Jouni Malinen6b8ece32012-09-30 19:29:40 +03002855
2856 if (auth_data->algorithm == WLAN_AUTH_SAE) {
2857 trans = auth_data->sae_trans;
2858 status = auth_data->sae_status;
2859 auth_data->expected_transaction = trans;
2860 }
2861
2862 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
2863 auth_data->data, auth_data->data_len,
Johannes Berg66e67e42012-01-20 13:55:27 +01002864 auth_data->bss->bssid,
2865 auth_data->bss->bssid, NULL, 0, 0);
2866 } else {
2867 const u8 *ssidie;
2868
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002869 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
2870 auth_data->bss->bssid, auth_data->tries,
2871 IEEE80211_AUTH_MAX_TRIES);
Johannes Berg66e67e42012-01-20 13:55:27 +01002872
Johannes Berg9caf0362012-11-29 01:25:20 +01002873 rcu_read_lock();
Johannes Berg66e67e42012-01-20 13:55:27 +01002874 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
Johannes Berg9caf0362012-11-29 01:25:20 +01002875 if (!ssidie) {
2876 rcu_read_unlock();
Johannes Berg66e67e42012-01-20 13:55:27 +01002877 return -EINVAL;
Johannes Berg9caf0362012-11-29 01:25:20 +01002878 }
Johannes Berg66e67e42012-01-20 13:55:27 +01002879 /*
2880 * Direct probe is sent to broadcast address as some APs
2881 * will not answer to direct packet in unassociated state.
2882 */
2883 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
Johannes Bergfe94fe02012-07-30 12:26:34 +02002884 NULL, 0, (u32) -1, true, false,
Johannes Berg55de9082012-07-26 17:24:39 +02002885 auth_data->bss->channel, false);
Johannes Berg9caf0362012-11-29 01:25:20 +01002886 rcu_read_unlock();
Johannes Berg66e67e42012-01-20 13:55:27 +01002887 }
2888
2889 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
2890 run_again(ifmgd, auth_data->timeout);
2891
2892 return 0;
2893}
2894
2895static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
2896{
2897 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2898 struct ieee80211_local *local = sdata->local;
2899
2900 lockdep_assert_held(&sdata->u.mgd.mtx);
2901
Johannes Berg66e67e42012-01-20 13:55:27 +01002902 assoc_data->tries++;
2903 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002904 sdata_info(sdata, "association with %pM timed out\n",
2905 assoc_data->bss->bssid);
Johannes Berg66e67e42012-01-20 13:55:27 +01002906
2907 /*
2908 * Most likely AP is not in the range so remove the
2909 * bss struct for that AP.
2910 */
2911 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
2912
2913 return -ETIMEDOUT;
2914 }
2915
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002916 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
2917 assoc_data->bss->bssid, assoc_data->tries,
2918 IEEE80211_ASSOC_MAX_TRIES);
Johannes Berg66e67e42012-01-20 13:55:27 +01002919 ieee80211_send_assoc(sdata);
2920
2921 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
2922 run_again(&sdata->u.mgd, assoc_data->timeout);
2923
2924 return 0;
2925}
2926
Johannes Berg1fa57d02010-06-10 10:21:32 +02002927void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
Johannes Berg60f8b392008-09-08 17:44:22 +02002928{
Johannes Berg60f8b392008-09-08 17:44:22 +02002929 struct ieee80211_local *local = sdata->local;
Johannes Berg1fa57d02010-06-10 10:21:32 +02002930 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg60f8b392008-09-08 17:44:22 +02002931
Johannes Berg77fdaa12009-07-07 03:45:17 +02002932 mutex_lock(&ifmgd->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02002933
Johannes Berg66e67e42012-01-20 13:55:27 +01002934 if (ifmgd->auth_data &&
2935 time_after(jiffies, ifmgd->auth_data->timeout)) {
2936 if (ifmgd->auth_data->done) {
2937 /*
2938 * ok ... we waited for assoc but userspace didn't,
2939 * so let's just kill the auth data
2940 */
2941 ieee80211_destroy_auth_data(sdata, false);
2942 } else if (ieee80211_probe_auth(sdata)) {
2943 u8 bssid[ETH_ALEN];
2944
2945 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2946
2947 ieee80211_destroy_auth_data(sdata, false);
2948
2949 mutex_unlock(&ifmgd->mtx);
2950 cfg80211_send_auth_timeout(sdata->dev, bssid);
2951 mutex_lock(&ifmgd->mtx);
2952 }
2953 } else if (ifmgd->auth_data)
2954 run_again(ifmgd, ifmgd->auth_data->timeout);
2955
2956 if (ifmgd->assoc_data &&
2957 time_after(jiffies, ifmgd->assoc_data->timeout)) {
2958 if (!ifmgd->assoc_data->have_beacon ||
2959 ieee80211_do_assoc(sdata)) {
2960 u8 bssid[ETH_ALEN];
2961
2962 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
2963
2964 ieee80211_destroy_assoc_data(sdata, false);
2965
2966 mutex_unlock(&ifmgd->mtx);
2967 cfg80211_send_assoc_timeout(sdata->dev, bssid);
2968 mutex_lock(&ifmgd->mtx);
2969 }
2970 } else if (ifmgd->assoc_data)
2971 run_again(ifmgd, ifmgd->assoc_data->timeout);
2972
Johannes Bergb291ba12009-07-10 15:29:03 +02002973 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2974 IEEE80211_STA_CONNECTION_POLL) &&
2975 ifmgd->associated) {
Maxim Levitskya43abf22009-07-31 18:54:12 +03002976 u8 bssid[ETH_ALEN];
Felix Fietkau72a8a3e2010-11-23 03:10:32 +01002977 int max_tries;
Maxim Levitskya43abf22009-07-31 18:54:12 +03002978
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01002979 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
Felix Fietkau4e5ff372010-11-23 03:10:31 +01002980
Felix Fietkau72a8a3e2010-11-23 03:10:32 +01002981 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
Ben Greear180205b2011-02-04 15:30:24 -08002982 max_tries = max_nullfunc_tries;
Felix Fietkau72a8a3e2010-11-23 03:10:32 +01002983 else
Ben Greear180205b2011-02-04 15:30:24 -08002984 max_tries = max_probe_tries;
Felix Fietkau72a8a3e2010-11-23 03:10:32 +01002985
Felix Fietkau4e5ff372010-11-23 03:10:31 +01002986 /* ACK received for nullfunc probing frame */
2987 if (!ifmgd->probe_send_count)
2988 ieee80211_reset_ap_probe(sdata);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002989 else if (ifmgd->nullfunc_failed) {
2990 if (ifmgd->probe_send_count < max_tries) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002991 mlme_dbg(sdata,
2992 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
2993 bssid, ifmgd->probe_send_count,
2994 max_tries);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01002995 ieee80211_mgd_probe_ap_send(sdata);
2996 } else {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002997 mlme_dbg(sdata,
2998 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
2999 bssid);
Johannes Berg95acac62011-07-12 12:30:59 +02003000 ieee80211_sta_connection_lost(sdata, bssid,
3001 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01003002 }
3003 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
Johannes Bergb291ba12009-07-10 15:29:03 +02003004 run_again(ifmgd, ifmgd->probe_timeout);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01003005 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003006 mlme_dbg(sdata,
3007 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3008 bssid, probe_wait_ms);
Johannes Berg95acac62011-07-12 12:30:59 +02003009 ieee80211_sta_connection_lost(sdata, bssid,
3010 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01003011 } else if (ifmgd->probe_send_count < max_tries) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003012 mlme_dbg(sdata,
3013 "No probe response from AP %pM after %dms, try %d/%i\n",
3014 bssid, probe_wait_ms,
3015 ifmgd->probe_send_count, max_tries);
Maxim Levitskya43abf22009-07-31 18:54:12 +03003016 ieee80211_mgd_probe_ap_send(sdata);
3017 } else {
Johannes Bergb291ba12009-07-10 15:29:03 +02003018 /*
3019 * We actually lost the connection ... or did we?
3020 * Let's make sure!
3021 */
Ben Greearb38afa82010-10-07 16:12:06 -07003022 wiphy_debug(local->hw.wiphy,
3023 "%s: No probe response from AP %pM"
3024 " after %dms, disconnecting.\n",
3025 sdata->name,
Ben Greear180205b2011-02-04 15:30:24 -08003026 bssid, probe_wait_ms);
Felix Fietkau04ac3c02010-12-02 21:01:08 +01003027
Johannes Berg95acac62011-07-12 12:30:59 +02003028 ieee80211_sta_connection_lost(sdata, bssid,
3029 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
Johannes Bergb291ba12009-07-10 15:29:03 +02003030 }
3031 }
3032
Johannes Berg77fdaa12009-07-07 03:45:17 +02003033 mutex_unlock(&ifmgd->mtx);
Johannes Berg66e67e42012-01-20 13:55:27 +01003034
3035 mutex_lock(&local->mtx);
3036 ieee80211_recalc_idle(local);
3037 mutex_unlock(&local->mtx);
Johannes Berg60f8b392008-09-08 17:44:22 +02003038}
Johannes Berg0a51b272008-09-08 17:44:25 +02003039
Johannes Bergb291ba12009-07-10 15:29:03 +02003040static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3041{
3042 struct ieee80211_sub_if_data *sdata =
3043 (struct ieee80211_sub_if_data *) data;
3044 struct ieee80211_local *local = sdata->local;
3045
3046 if (local->quiescing)
3047 return;
3048
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02003049 ieee80211_queue_work(&sdata->local->hw,
3050 &sdata->u.mgd.beacon_connection_loss_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02003051}
3052
3053static void ieee80211_sta_conn_mon_timer(unsigned long data)
3054{
3055 struct ieee80211_sub_if_data *sdata =
3056 (struct ieee80211_sub_if_data *) data;
3057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3058 struct ieee80211_local *local = sdata->local;
3059
3060 if (local->quiescing)
3061 return;
3062
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04003063 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02003064}
3065
3066static void ieee80211_sta_monitor_work(struct work_struct *work)
3067{
3068 struct ieee80211_sub_if_data *sdata =
3069 container_of(work, struct ieee80211_sub_if_data,
3070 u.mgd.monitor_work);
3071
3072 ieee80211_mgd_probe_ap(sdata, false);
3073}
3074
Johannes Berga1678f82008-09-11 00:01:47 +02003075static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3076{
Eliad Peller494f1fe2012-02-19 15:26:09 +02003077 u32 flags;
3078
Kalle Vaload935682009-04-19 08:47:19 +03003079 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02003080 __ieee80211_stop_poll(sdata);
Kalle Vaload935682009-04-19 08:47:19 +03003081
Johannes Bergb291ba12009-07-10 15:29:03 +02003082 /* let's probe the connection once */
Eliad Peller494f1fe2012-02-19 15:26:09 +02003083 flags = sdata->local->hw.flags;
3084 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3085 ieee80211_queue_work(&sdata->local->hw,
3086 &sdata->u.mgd.monitor_work);
Johannes Bergb291ba12009-07-10 15:29:03 +02003087 /* and do all the other regular work too */
Johannes Berg64592c82010-06-10 10:21:31 +02003088 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
Kalle Vaload935682009-04-19 08:47:19 +03003089 }
Johannes Berga1678f82008-09-11 00:01:47 +02003090}
3091
Johannes Berg5bb644a2009-05-17 11:40:42 +02003092#ifdef CONFIG_PM
3093void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
3094{
3095 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3096
3097 /*
3098 * we need to use atomic bitops for the running bits
3099 * only because both timers might fire at the same
3100 * time -- the code here is properly synchronised.
3101 */
3102
Johannes Bergd1f5b7a2010-08-05 17:05:55 +02003103 cancel_work_sync(&ifmgd->request_smps_work);
3104
Johannes Berg0ecfe8062011-11-09 12:14:16 +01003105 cancel_work_sync(&ifmgd->monitor_work);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02003106 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
Johannes Berg882a7c62012-08-01 22:32:45 +02003107 cancel_work_sync(&ifmgd->csa_connection_drop_work);
Johannes Berg5bb644a2009-05-17 11:40:42 +02003108 if (del_timer_sync(&ifmgd->timer))
3109 set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
3110
3111 cancel_work_sync(&ifmgd->chswitch_work);
3112 if (del_timer_sync(&ifmgd->chswitch_timer))
3113 set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
Johannes Bergb291ba12009-07-10 15:29:03 +02003114
Johannes Bergb291ba12009-07-10 15:29:03 +02003115 /* these will just be re-established on connection */
3116 del_timer_sync(&ifmgd->conn_mon_timer);
3117 del_timer_sync(&ifmgd->bcn_mon_timer);
Johannes Berg5bb644a2009-05-17 11:40:42 +02003118}
3119
3120void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3121{
3122 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3123
Rajkumar Manoharan676b58c2011-07-07 23:33:39 +05303124 if (!ifmgd->associated)
3125 return;
3126
Johannes Berg95acac62011-07-12 12:30:59 +02003127 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3128 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3129 mutex_lock(&ifmgd->mtx);
3130 if (ifmgd->associated) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003131 mlme_dbg(sdata,
3132 "driver requested disconnect after resume\n");
Johannes Berg95acac62011-07-12 12:30:59 +02003133 ieee80211_sta_connection_lost(sdata,
3134 ifmgd->associated->bssid,
3135 WLAN_REASON_UNSPECIFIED);
3136 mutex_unlock(&ifmgd->mtx);
3137 return;
3138 }
3139 mutex_unlock(&ifmgd->mtx);
3140 }
3141
Johannes Berg5bb644a2009-05-17 11:40:42 +02003142 if (test_and_clear_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running))
3143 add_timer(&ifmgd->timer);
3144 if (test_and_clear_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running))
3145 add_timer(&ifmgd->chswitch_timer);
Felix Fietkauc8a79722010-11-19 22:55:37 +01003146 ieee80211_sta_reset_beacon_monitor(sdata);
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02003147
3148 mutex_lock(&sdata->local->mtx);
Felix Fietkau46090972010-11-23 20:28:03 +01003149 ieee80211_restart_sta_timer(sdata);
Stanislaw Gruszka925e64c2012-05-16 15:27:20 +02003150 mutex_unlock(&sdata->local->mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02003151}
3152#endif
3153
Johannes Berg9c6bd792008-09-11 00:01:52 +02003154/* interface setup */
3155void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3156{
Johannes Berg46900292009-02-15 12:44:28 +01003157 struct ieee80211_if_managed *ifmgd;
Johannes Berg9c6bd792008-09-11 00:01:52 +02003158
Johannes Berg46900292009-02-15 12:44:28 +01003159 ifmgd = &sdata->u.mgd;
Johannes Bergb291ba12009-07-10 15:29:03 +02003160 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
Johannes Berg46900292009-02-15 12:44:28 +01003161 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
Juuso Oikarinen1e4dcd02010-03-19 07:14:53 +02003162 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3163 ieee80211_beacon_connection_loss_work);
Johannes Berg882a7c62012-08-01 22:32:45 +02003164 INIT_WORK(&ifmgd->csa_connection_drop_work,
3165 ieee80211_csa_connection_drop_work);
Johannes Bergd1f5b7a2010-08-05 17:05:55 +02003166 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
Johannes Berg46900292009-02-15 12:44:28 +01003167 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
Johannes Berg9c6bd792008-09-11 00:01:52 +02003168 (unsigned long) sdata);
Johannes Bergb291ba12009-07-10 15:29:03 +02003169 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3170 (unsigned long) sdata);
3171 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3172 (unsigned long) sdata);
Johannes Berg46900292009-02-15 12:44:28 +01003173 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
Sujithc481ec92009-01-06 09:28:37 +05303174 (unsigned long) sdata);
Johannes Berg9c6bd792008-09-11 00:01:52 +02003175
Johannes Bergab1faea2009-07-01 21:41:17 +02003176 ifmgd->flags = 0;
Mohammed Shafi Shajakhan1478acb2011-12-14 19:46:08 +05303177 ifmgd->powersave = sdata->wdev.ps;
Eliad Pellerdc41e4d2012-03-14 16:15:03 +02003178 ifmgd->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
3179 ifmgd->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
Johannes Bergbbbdff92009-04-16 13:27:42 +02003180
Johannes Berg77fdaa12009-07-07 03:45:17 +02003181 mutex_init(&ifmgd->mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01003182
3183 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3184 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3185 else
3186 ifmgd->req_smps = IEEE80211_SMPS_OFF;
Johannes Berg9c6bd792008-09-11 00:01:52 +02003187}
3188
3189/* scan finished notification */
Johannes Berg0a51b272008-09-08 17:44:25 +02003190void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3191{
Johannes Berg31ee67a2012-07-06 21:18:24 +02003192 struct ieee80211_sub_if_data *sdata;
Johannes Berga1678f82008-09-11 00:01:47 +02003193
3194 /* Restart STA timers */
3195 rcu_read_lock();
3196 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3197 ieee80211_restart_sta_timer(sdata);
3198 rcu_read_unlock();
Johannes Berg0a51b272008-09-08 17:44:25 +02003199}
Johannes Berg10f644a2009-04-16 13:17:25 +02003200
3201int ieee80211_max_network_latency(struct notifier_block *nb,
3202 unsigned long data, void *dummy)
3203{
3204 s32 latency_usec = (s32) data;
3205 struct ieee80211_local *local =
3206 container_of(nb, struct ieee80211_local,
3207 network_latency_notifier);
3208
3209 mutex_lock(&local->iflist_mtx);
3210 ieee80211_recalc_ps(local, latency_usec);
3211 mutex_unlock(&local->iflist_mtx);
3212
3213 return 0;
3214}
Johannes Berg77fdaa12009-07-07 03:45:17 +02003215
Johannes Bergf2d9d272012-11-22 14:11:39 +01003216static u32 chandef_downgrade(struct cfg80211_chan_def *c)
3217{
3218 u32 ret;
3219 int tmp;
3220
3221 switch (c->width) {
3222 case NL80211_CHAN_WIDTH_20:
3223 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3224 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3225 break;
3226 case NL80211_CHAN_WIDTH_40:
3227 c->width = NL80211_CHAN_WIDTH_20;
3228 c->center_freq1 = c->chan->center_freq;
3229 ret = IEEE80211_STA_DISABLE_40MHZ |
3230 IEEE80211_STA_DISABLE_VHT;
3231 break;
3232 case NL80211_CHAN_WIDTH_80:
3233 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3234 /* n_P40 */
3235 tmp /= 2;
3236 /* freq_P40 */
3237 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3238 c->width = NL80211_CHAN_WIDTH_40;
3239 ret = IEEE80211_STA_DISABLE_VHT;
3240 break;
3241 case NL80211_CHAN_WIDTH_80P80:
3242 c->center_freq2 = 0;
3243 c->width = NL80211_CHAN_WIDTH_80;
3244 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3245 IEEE80211_STA_DISABLE_160MHZ;
3246 break;
3247 case NL80211_CHAN_WIDTH_160:
3248 /* n_P20 */
3249 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3250 /* n_P80 */
3251 tmp /= 4;
3252 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3253 c->width = NL80211_CHAN_WIDTH_80;
3254 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3255 IEEE80211_STA_DISABLE_160MHZ;
3256 break;
3257 default:
3258 case NL80211_CHAN_WIDTH_20_NOHT:
3259 WARN_ON_ONCE(1);
3260 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3261 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3262 break;
3263 }
3264
3265 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3266
3267 return ret;
3268}
3269
3270static u32
3271ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
3272 struct ieee80211_supported_band *sband,
3273 struct ieee80211_channel *channel,
3274 const struct ieee80211_ht_operation *ht_oper,
3275 const struct ieee80211_vht_operation *vht_oper,
3276 struct cfg80211_chan_def *chandef)
3277{
3278 struct cfg80211_chan_def vht_chandef;
3279 u32 ht_cfreq, ret;
3280
3281 chandef->chan = channel;
3282 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
3283 chandef->center_freq1 = channel->center_freq;
3284 chandef->center_freq2 = 0;
3285
3286 if (!ht_oper || !sband->ht_cap.ht_supported) {
3287 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3288 goto out;
3289 }
3290
3291 chandef->width = NL80211_CHAN_WIDTH_20;
3292
3293 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
3294 channel->band);
3295 /* check that channel matches the right operating channel */
3296 if (channel->center_freq != ht_cfreq) {
3297 /*
3298 * It's possible that some APs are confused here;
3299 * Netgear WNDR3700 sometimes reports 4 higher than
3300 * the actual channel in association responses, but
3301 * since we look at probe response/beacon data here
3302 * it should be OK.
3303 */
3304 sdata_info(sdata,
3305 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
3306 channel->center_freq, ht_cfreq,
3307 ht_oper->primary_chan, channel->band);
3308 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3309 goto out;
3310 }
3311
3312 /* check 40 MHz support, if we have it */
3313 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
3314 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3315 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3316 chandef->width = NL80211_CHAN_WIDTH_40;
3317 chandef->center_freq1 += 10;
3318 break;
3319 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3320 chandef->width = NL80211_CHAN_WIDTH_40;
3321 chandef->center_freq1 -= 10;
3322 break;
3323 }
3324 } else {
3325 /* 40 MHz (and 80 MHz) must be supported for VHT */
3326 ret = IEEE80211_STA_DISABLE_VHT;
3327 goto out;
3328 }
3329
3330 if (!vht_oper || !sband->vht_cap.vht_supported) {
3331 ret = IEEE80211_STA_DISABLE_VHT;
3332 goto out;
3333 }
3334
3335 vht_chandef.chan = channel;
3336 vht_chandef.center_freq1 =
3337 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
3338 channel->band);
3339 vht_chandef.center_freq2 = 0;
3340
3341 if (vht_oper->center_freq_seg2_idx)
3342 vht_chandef.center_freq2 =
3343 ieee80211_channel_to_frequency(
3344 vht_oper->center_freq_seg2_idx,
3345 channel->band);
3346
3347 switch (vht_oper->chan_width) {
3348 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3349 vht_chandef.width = chandef->width;
3350 break;
3351 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3352 vht_chandef.width = NL80211_CHAN_WIDTH_80;
3353 break;
3354 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3355 vht_chandef.width = NL80211_CHAN_WIDTH_160;
3356 break;
3357 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3358 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
3359 break;
3360 default:
3361 sdata_info(sdata,
3362 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
3363 vht_oper->chan_width);
3364 ret = IEEE80211_STA_DISABLE_VHT;
3365 goto out;
3366 }
3367
3368 if (!cfg80211_chandef_valid(&vht_chandef)) {
3369 sdata_info(sdata,
3370 "AP VHT information is invalid, disable VHT\n");
3371 ret = IEEE80211_STA_DISABLE_VHT;
3372 goto out;
3373 }
3374
3375 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
3376 ret = 0;
3377 goto out;
3378 }
3379
3380 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
3381 sdata_info(sdata,
3382 "AP VHT information doesn't match HT, disable VHT\n");
3383 ret = IEEE80211_STA_DISABLE_VHT;
3384 goto out;
3385 }
3386
3387 *chandef = vht_chandef;
3388
3389 ret = 0;
3390
3391 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
3392 IEEE80211_CHAN_DISABLED)) {
3393 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
3394 ret = IEEE80211_STA_DISABLE_HT |
3395 IEEE80211_STA_DISABLE_VHT;
3396 goto out;
3397 }
3398
3399 ret = chandef_downgrade(chandef);
3400 }
3401
3402 if (chandef->width != vht_chandef.width)
3403 sdata_info(sdata,
3404 "local regulatory prevented using AP HT/VHT configuration, downgraded\n");
3405
3406out:
3407 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
3408 return ret;
3409}
3410
3411static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3412 struct cfg80211_bss *cbss)
3413{
3414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3415 const u8 *ht_cap_ie, *vht_cap_ie;
3416 const struct ieee80211_ht_cap *ht_cap;
3417 const struct ieee80211_vht_cap *vht_cap;
3418 u8 chains = 1;
3419
3420 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3421 return chains;
3422
Johannes Berg9caf0362012-11-29 01:25:20 +01003423 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
Johannes Bergf2d9d272012-11-22 14:11:39 +01003424 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3425 ht_cap = (void *)(ht_cap_ie + 2);
3426 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3427 /*
3428 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3429 * "Tx Unequal Modulation Supported" fields.
3430 */
3431 }
3432
3433 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3434 return chains;
3435
Johannes Berg9caf0362012-11-29 01:25:20 +01003436 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
Johannes Bergf2d9d272012-11-22 14:11:39 +01003437 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3438 u8 nss;
3439 u16 tx_mcs_map;
3440
3441 vht_cap = (void *)(vht_cap_ie + 2);
3442 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3443 for (nss = 8; nss > 0; nss--) {
3444 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3445 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3446 break;
3447 }
3448 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3449 chains = max(chains, nss);
3450 }
3451
3452 return chains;
3453}
3454
Johannes Bergb17166a2012-07-27 11:41:27 +02003455static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3456 struct cfg80211_bss *cbss)
Johannes Berga1cf7752012-03-08 15:02:07 +01003457{
3458 struct ieee80211_local *local = sdata->local;
3459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg24398e32012-03-28 10:58:36 +02003460 const struct ieee80211_ht_operation *ht_oper = NULL;
Johannes Bergf2d9d272012-11-22 14:11:39 +01003461 const struct ieee80211_vht_operation *vht_oper = NULL;
Johannes Berg24398e32012-03-28 10:58:36 +02003462 struct ieee80211_supported_band *sband;
Johannes Berg4bf88532012-11-09 11:39:59 +01003463 struct cfg80211_chan_def chandef;
Johannes Bergf2d9d272012-11-22 14:11:39 +01003464 int ret;
Johannes Berga1cf7752012-03-08 15:02:07 +01003465
Johannes Berg24398e32012-03-28 10:58:36 +02003466 sband = local->hw.wiphy->bands[cbss->channel->band];
3467
Johannes Bergf2d9d272012-11-22 14:11:39 +01003468 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3469 IEEE80211_STA_DISABLE_80P80MHZ |
3470 IEEE80211_STA_DISABLE_160MHZ);
Johannes Berg24398e32012-03-28 10:58:36 +02003471
Johannes Berg9caf0362012-11-29 01:25:20 +01003472 rcu_read_lock();
3473
Johannes Bergf2d9d272012-11-22 14:11:39 +01003474 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3475 sband->ht_cap.ht_supported) {
3476 const u8 *ht_oper_ie;
3477
Johannes Berg9caf0362012-11-29 01:25:20 +01003478 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
Johannes Berg24398e32012-03-28 10:58:36 +02003479 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3480 ht_oper = (void *)(ht_oper_ie + 2);
3481 }
3482
Johannes Bergf2d9d272012-11-22 14:11:39 +01003483 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3484 sband->vht_cap.vht_supported) {
3485 const u8 *vht_oper_ie;
3486
Johannes Berg9caf0362012-11-29 01:25:20 +01003487 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3488 WLAN_EID_VHT_OPERATION);
Johannes Bergf2d9d272012-11-22 14:11:39 +01003489 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3490 vht_oper = (void *)(vht_oper_ie + 2);
3491 if (vht_oper && !ht_oper) {
3492 vht_oper = NULL;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003493 sdata_info(sdata,
Johannes Bergf2d9d272012-11-22 14:11:39 +01003494 "AP advertised VHT without HT, disabling both\n");
3495 sdata->flags |= IEEE80211_STA_DISABLE_HT;
3496 sdata->flags |= IEEE80211_STA_DISABLE_VHT;
Johannes Berg24398e32012-03-28 10:58:36 +02003497 }
3498 }
3499
Johannes Bergf2d9d272012-11-22 14:11:39 +01003500 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3501 cbss->channel,
3502 ht_oper, vht_oper,
3503 &chandef);
Johannes Berg04ecd252012-09-11 14:34:12 +02003504
Johannes Bergf2d9d272012-11-22 14:11:39 +01003505 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3506 local->rx_chains);
Johannes Berg24398e32012-03-28 10:58:36 +02003507
Johannes Berg9caf0362012-11-29 01:25:20 +01003508 rcu_read_unlock();
3509
Johannes Berg04ecd252012-09-11 14:34:12 +02003510 /* will change later if needed */
3511 sdata->smps_mode = IEEE80211_SMPS_OFF;
3512
Johannes Bergf2d9d272012-11-22 14:11:39 +01003513 /*
3514 * If this fails (possibly due to channel context sharing
3515 * on incompatible channels, e.g. 80+80 and 160 sharing the
3516 * same control channel) try to use a smaller bandwidth.
3517 */
3518 ret = ieee80211_vif_use_channel(sdata, &chandef,
3519 IEEE80211_CHANCTX_SHARED);
3520 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
3521 ifmgd->flags |= chandef_downgrade(&chandef);
3522 return ret;
Johannes Bergb17166a2012-07-27 11:41:27 +02003523}
3524
3525static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3526 struct cfg80211_bss *cbss, bool assoc)
3527{
3528 struct ieee80211_local *local = sdata->local;
3529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3530 struct ieee80211_bss *bss = (void *)cbss->priv;
3531 struct sta_info *new_sta = NULL;
3532 bool have_sta = false;
3533 int err;
3534
3535 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3536 return -EINVAL;
3537
3538 if (assoc) {
3539 rcu_read_lock();
3540 have_sta = sta_info_get(sdata, cbss->bssid);
3541 rcu_read_unlock();
3542 }
3543
3544 if (!have_sta) {
3545 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3546 if (!new_sta)
3547 return -ENOMEM;
3548 }
3549
3550 mutex_lock(&local->mtx);
3551 ieee80211_recalc_idle(sdata->local);
3552 mutex_unlock(&local->mtx);
3553
Johannes Berg13e0c8e2012-07-27 10:43:16 +02003554 if (new_sta) {
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003555 u32 rates = 0, basic_rates = 0;
3556 bool have_higher_than_11mbit;
3557 int min_rate = INT_MAX, min_rate_index = -1;
Johannes Bergb17166a2012-07-27 11:41:27 +02003558 struct ieee80211_supported_band *sband;
3559
3560 sband = local->hw.wiphy->bands[cbss->channel->band];
3561
3562 err = ieee80211_prep_channel(sdata, cbss);
3563 if (err) {
3564 sta_info_free(local, new_sta);
3565 return err;
3566 }
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003567
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003568 ieee80211_get_rates(sband, bss->supp_rates,
3569 bss->supp_rates_len,
3570 &rates, &basic_rates,
3571 &have_higher_than_11mbit,
3572 &min_rate, &min_rate_index);
3573
3574 /*
3575 * This used to be a workaround for basic rates missing
3576 * in the association response frame. Now that we no
3577 * longer use the basic rates from there, it probably
3578 * doesn't happen any more, but keep the workaround so
3579 * in case some *other* APs are buggy in different ways
3580 * we can connect -- with a warning.
3581 */
3582 if (!basic_rates && min_rate_index >= 0) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003583 sdata_info(sdata,
3584 "No basic rates, using min rate instead\n");
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003585 basic_rates = BIT(min_rate_index);
3586 }
3587
Johannes Berg13e0c8e2012-07-27 10:43:16 +02003588 new_sta->sta.supp_rates[cbss->channel->band] = rates;
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003589 sdata->vif.bss_conf.basic_rates = basic_rates;
3590
3591 /* cf. IEEE 802.11 9.2.12 */
Johannes Berg55de9082012-07-26 17:24:39 +02003592 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003593 have_higher_than_11mbit)
3594 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3595 else
3596 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3597
3598 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3599
Johannes Berg8c358bc2012-05-22 22:13:05 +02003600 /* set timing information */
3601 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3602 sdata->vif.bss_conf.sync_tsf = cbss->tsf;
3603 sdata->vif.bss_conf.sync_device_ts = bss->device_ts;
3604
3605 /* tell driver about BSSID, basic rates and timing */
Johannes Berg5d6a1b02012-03-08 15:02:08 +01003606 ieee80211_bss_info_change_notify(sdata,
Johannes Berg8c358bc2012-05-22 22:13:05 +02003607 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3608 BSS_CHANGED_BEACON_INT);
Johannes Berga1cf7752012-03-08 15:02:07 +01003609
3610 if (assoc)
Johannes Berg13e0c8e2012-07-27 10:43:16 +02003611 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
Johannes Berga1cf7752012-03-08 15:02:07 +01003612
Johannes Berg13e0c8e2012-07-27 10:43:16 +02003613 err = sta_info_insert(new_sta);
3614 new_sta = NULL;
Johannes Berga1cf7752012-03-08 15:02:07 +01003615 if (err) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003616 sdata_info(sdata,
3617 "failed to insert STA entry for the AP (error %d)\n",
3618 err);
Johannes Berga1cf7752012-03-08 15:02:07 +01003619 return err;
3620 }
3621 } else
Joe Perchesb203ca32012-05-08 18:56:52 +00003622 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
Johannes Berga1cf7752012-03-08 15:02:07 +01003623
3624 return 0;
3625}
3626
Johannes Berg77fdaa12009-07-07 03:45:17 +02003627/* config hooks */
3628int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3629 struct cfg80211_auth_request *req)
3630{
Johannes Berg66e67e42012-01-20 13:55:27 +01003631 struct ieee80211_local *local = sdata->local;
3632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3633 struct ieee80211_mgd_auth_data *auth_data;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003634 u16 auth_alg;
Johannes Berg66e67e42012-01-20 13:55:27 +01003635 int err;
3636
3637 /* prepare auth data structure */
Johannes Berg77fdaa12009-07-07 03:45:17 +02003638
3639 switch (req->auth_type) {
3640 case NL80211_AUTHTYPE_OPEN_SYSTEM:
3641 auth_alg = WLAN_AUTH_OPEN;
3642 break;
3643 case NL80211_AUTHTYPE_SHARED_KEY:
Johannes Berg66e67e42012-01-20 13:55:27 +01003644 if (IS_ERR(local->wep_tx_tfm))
Johannes Berg9dca9c42010-07-21 10:09:25 +02003645 return -EOPNOTSUPP;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003646 auth_alg = WLAN_AUTH_SHARED_KEY;
3647 break;
3648 case NL80211_AUTHTYPE_FT:
3649 auth_alg = WLAN_AUTH_FT;
3650 break;
3651 case NL80211_AUTHTYPE_NETWORK_EAP:
3652 auth_alg = WLAN_AUTH_LEAP;
3653 break;
Jouni Malinen6b8ece32012-09-30 19:29:40 +03003654 case NL80211_AUTHTYPE_SAE:
3655 auth_alg = WLAN_AUTH_SAE;
3656 break;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003657 default:
3658 return -EOPNOTSUPP;
3659 }
3660
Jouni Malinen6b8ece32012-09-30 19:29:40 +03003661 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
3662 req->ie_len, GFP_KERNEL);
Johannes Berg66e67e42012-01-20 13:55:27 +01003663 if (!auth_data)
Johannes Berg77fdaa12009-07-07 03:45:17 +02003664 return -ENOMEM;
3665
Johannes Berg66e67e42012-01-20 13:55:27 +01003666 auth_data->bss = req->bss;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003667
Jouni Malinen6b8ece32012-09-30 19:29:40 +03003668 if (req->sae_data_len >= 4) {
3669 __le16 *pos = (__le16 *) req->sae_data;
3670 auth_data->sae_trans = le16_to_cpu(pos[0]);
3671 auth_data->sae_status = le16_to_cpu(pos[1]);
3672 memcpy(auth_data->data, req->sae_data + 4,
3673 req->sae_data_len - 4);
3674 auth_data->data_len += req->sae_data_len - 4;
3675 }
3676
Johannes Berg77fdaa12009-07-07 03:45:17 +02003677 if (req->ie && req->ie_len) {
Jouni Malinen6b8ece32012-09-30 19:29:40 +03003678 memcpy(&auth_data->data[auth_data->data_len],
3679 req->ie, req->ie_len);
3680 auth_data->data_len += req->ie_len;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003681 }
3682
Johannes Bergfffd0932009-07-08 14:22:54 +02003683 if (req->key && req->key_len) {
Johannes Berg66e67e42012-01-20 13:55:27 +01003684 auth_data->key_len = req->key_len;
3685 auth_data->key_idx = req->key_idx;
3686 memcpy(auth_data->key, req->key, req->key_len);
Johannes Bergfffd0932009-07-08 14:22:54 +02003687 }
3688
Johannes Berg66e67e42012-01-20 13:55:27 +01003689 auth_data->algorithm = auth_alg;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003690
Johannes Berg66e67e42012-01-20 13:55:27 +01003691 /* try to authenticate/probe */
Johannes Bergf679f652009-12-23 13:15:34 +01003692
Johannes Berg66e67e42012-01-20 13:55:27 +01003693 mutex_lock(&ifmgd->mtx);
Johannes Berg77fdaa12009-07-07 03:45:17 +02003694
Johannes Berg66e67e42012-01-20 13:55:27 +01003695 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
3696 ifmgd->assoc_data) {
3697 err = -EBUSY;
3698 goto err_free;
3699 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02003700
Johannes Berg66e67e42012-01-20 13:55:27 +01003701 if (ifmgd->auth_data)
3702 ieee80211_destroy_auth_data(sdata, false);
Guy Eilam2a33bee2011-08-17 15:18:15 +03003703
Johannes Berg66e67e42012-01-20 13:55:27 +01003704 /* prep auth_data so we don't go into idle on disassoc */
3705 ifmgd->auth_data = auth_data;
3706
3707 if (ifmgd->associated)
Johannes Berg37ad3882012-02-24 13:50:54 +01003708 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
Johannes Berg66e67e42012-01-20 13:55:27 +01003709
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003710 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
Johannes Berg66e67e42012-01-20 13:55:27 +01003711
Johannes Berga1cf7752012-03-08 15:02:07 +01003712 err = ieee80211_prep_connection(sdata, req->bss, false);
3713 if (err)
Johannes Berg66e67e42012-01-20 13:55:27 +01003714 goto err_clear;
Guy Eilam2a33bee2011-08-17 15:18:15 +03003715
Johannes Berg66e67e42012-01-20 13:55:27 +01003716 err = ieee80211_probe_auth(sdata);
3717 if (err) {
Johannes Berg66e67e42012-01-20 13:55:27 +01003718 sta_info_destroy_addr(sdata, req->bss->bssid);
3719 goto err_clear;
Johannes Bergaf6b6372009-12-23 13:15:35 +01003720 }
3721
Johannes Berg66e67e42012-01-20 13:55:27 +01003722 /* hold our own reference */
3723 cfg80211_ref_bss(auth_data->bss);
3724 err = 0;
3725 goto out_unlock;
Johannes Berge5b900d2010-07-29 16:08:55 +02003726
Johannes Berg66e67e42012-01-20 13:55:27 +01003727 err_clear:
Eliad Peller3d2abdf2012-09-04 17:44:45 +03003728 memset(ifmgd->bssid, 0, ETH_ALEN);
3729 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
Johannes Berg66e67e42012-01-20 13:55:27 +01003730 ifmgd->auth_data = NULL;
3731 err_free:
3732 kfree(auth_data);
3733 out_unlock:
3734 mutex_unlock(&ifmgd->mtx);
Johannes Berge5b900d2010-07-29 16:08:55 +02003735
Johannes Berg66e67e42012-01-20 13:55:27 +01003736 return err;
Johannes Bergaf6b6372009-12-23 13:15:35 +01003737}
3738
Johannes Berg77fdaa12009-07-07 03:45:17 +02003739int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
3740 struct cfg80211_assoc_request *req)
3741{
Johannes Berg66e67e42012-01-20 13:55:27 +01003742 struct ieee80211_local *local = sdata->local;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003743 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01003744 struct ieee80211_bss *bss = (void *)req->bss->priv;
Johannes Berg66e67e42012-01-20 13:55:27 +01003745 struct ieee80211_mgd_assoc_data *assoc_data;
Johannes Berg4e74bfd2012-03-08 15:02:04 +01003746 struct ieee80211_supported_band *sband;
Johannes Berg9dde6422012-05-16 23:43:19 +02003747 const u8 *ssidie, *ht_ie;
Guy Eilam2a33bee2011-08-17 15:18:15 +03003748 int i, err;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003749
Johannes Berg66e67e42012-01-20 13:55:27 +01003750 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
3751 if (!assoc_data)
Johannes Bergaf6b6372009-12-23 13:15:35 +01003752 return -ENOMEM;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003753
Johannes Berg9caf0362012-11-29 01:25:20 +01003754 rcu_read_lock();
3755 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
3756 if (!ssidie) {
3757 rcu_read_unlock();
3758 kfree(assoc_data);
3759 return -EINVAL;
3760 }
3761 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
3762 assoc_data->ssid_len = ssidie[1];
3763 rcu_read_unlock();
3764
Johannes Berg66e67e42012-01-20 13:55:27 +01003765 mutex_lock(&ifmgd->mtx);
3766
3767 if (ifmgd->associated)
Johannes Berg37ad3882012-02-24 13:50:54 +01003768 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
Johannes Berg66e67e42012-01-20 13:55:27 +01003769
3770 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
3771 err = -EBUSY;
3772 goto err_free;
Guy Eilam2a33bee2011-08-17 15:18:15 +03003773 }
3774
Johannes Berg66e67e42012-01-20 13:55:27 +01003775 if (ifmgd->assoc_data) {
3776 err = -EBUSY;
3777 goto err_free;
3778 }
3779
3780 if (ifmgd->auth_data) {
3781 bool match;
3782
3783 /* keep sta info, bssid if matching */
Joe Perchesb203ca32012-05-08 18:56:52 +00003784 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
Johannes Berg66e67e42012-01-20 13:55:27 +01003785 ieee80211_destroy_auth_data(sdata, match);
3786 }
3787
3788 /* prepare assoc data */
Johannes Berg19c3b832012-08-01 20:13:36 +02003789
Juuso Oikarinend8ec4432010-10-01 16:02:31 +03003790 ifmgd->beacon_crc_valid = false;
3791
Johannes Bergde5036a2012-03-08 15:02:03 +01003792 /*
3793 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
3794 * We still associate in non-HT mode (11a/b/g) if any one of these
3795 * ciphers is configured as pairwise.
3796 * We can set this to true for non-11n hardware, that'll be checked
3797 * separately along with the peer capabilities.
3798 */
Johannes Berg1c4cb922012-05-30 15:57:00 +02003799 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02003800 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
3801 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
Johannes Berg1c4cb922012-05-30 15:57:00 +02003802 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
Johannes Berga8243b72012-11-22 14:32:09 +01003803 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
Mahesh Palivelad545dab2012-07-24 03:33:10 +00003804 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
Johannes Berg1c4cb922012-05-30 15:57:00 +02003805 netdev_info(sdata->dev,
Mahesh Palivelad545dab2012-07-24 03:33:10 +00003806 "disabling HT/VHT due to WEP/TKIP use\n");
Johannes Berg1c4cb922012-05-30 15:57:00 +02003807 }
3808 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02003809
Mahesh Palivelad545dab2012-07-24 03:33:10 +00003810 if (req->flags & ASSOC_REQ_DISABLE_HT) {
Johannes Berga8243b72012-11-22 14:32:09 +01003811 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
Mahesh Palivelad545dab2012-07-24 03:33:10 +00003812 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3813 }
Ben Greearef96a8422011-11-18 11:32:00 -08003814
Johannes Berg4e74bfd2012-03-08 15:02:04 +01003815 /* Also disable HT if we don't support it or the AP doesn't use WMM */
3816 sband = local->hw.wiphy->bands[req->bss->channel->band];
3817 if (!sband->ht_cap.ht_supported ||
Johannes Berg1c4cb922012-05-30 15:57:00 +02003818 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
Johannes Berga8243b72012-11-22 14:32:09 +01003819 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
Johannes Berg1b49de22012-07-27 10:29:14 +02003820 if (!bss->wmm_used)
3821 netdev_info(sdata->dev,
3822 "disabling HT as WMM/QoS is not supported by the AP\n");
Johannes Berg1c4cb922012-05-30 15:57:00 +02003823 }
Johannes Berg4e74bfd2012-03-08 15:02:04 +01003824
Mahesh Palivelad545dab2012-07-24 03:33:10 +00003825 /* disable VHT if we don't support it or the AP doesn't use WMM */
3826 if (!sband->vht_cap.vht_supported ||
3827 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
3828 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
Johannes Berg1b49de22012-07-27 10:29:14 +02003829 if (!bss->wmm_used)
3830 netdev_info(sdata->dev,
3831 "disabling VHT as WMM/QoS is not supported by the AP\n");
Mahesh Palivelad545dab2012-07-24 03:33:10 +00003832 }
3833
Ben Greearef96a8422011-11-18 11:32:00 -08003834 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
3835 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
3836 sizeof(ifmgd->ht_capa_mask));
3837
Johannes Berg77fdaa12009-07-07 03:45:17 +02003838 if (req->ie && req->ie_len) {
Johannes Berg66e67e42012-01-20 13:55:27 +01003839 memcpy(assoc_data->ie, req->ie, req->ie_len);
3840 assoc_data->ie_len = req->ie_len;
3841 }
Johannes Berg77fdaa12009-07-07 03:45:17 +02003842
Johannes Berg66e67e42012-01-20 13:55:27 +01003843 assoc_data->bss = req->bss;
Johannes Bergf679f652009-12-23 13:15:34 +01003844
Johannes Bergaf6b6372009-12-23 13:15:35 +01003845 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
3846 if (ifmgd->powersave)
Johannes Berg04ecd252012-09-11 14:34:12 +02003847 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
Johannes Bergaf6b6372009-12-23 13:15:35 +01003848 else
Johannes Berg04ecd252012-09-11 14:34:12 +02003849 sdata->smps_mode = IEEE80211_SMPS_OFF;
Johannes Bergaf6b6372009-12-23 13:15:35 +01003850 } else
Johannes Berg04ecd252012-09-11 14:34:12 +02003851 sdata->smps_mode = ifmgd->req_smps;
Johannes Bergaf6b6372009-12-23 13:15:35 +01003852
Johannes Berg66e67e42012-01-20 13:55:27 +01003853 assoc_data->capability = req->bss->capability;
Johannes Berg32c50572012-03-28 11:04:29 +02003854 assoc_data->wmm = bss->wmm_used &&
3855 (local->hw.queues >= IEEE80211_NUM_ACS);
Johannes Berg66e67e42012-01-20 13:55:27 +01003856 assoc_data->supp_rates = bss->supp_rates;
3857 assoc_data->supp_rates_len = bss->supp_rates_len;
Johannes Berg9dde6422012-05-16 23:43:19 +02003858
Johannes Berg9caf0362012-11-29 01:25:20 +01003859 rcu_read_lock();
Johannes Berg9dde6422012-05-16 23:43:19 +02003860 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
3861 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
3862 assoc_data->ap_ht_param =
3863 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
3864 else
Johannes Berga8243b72012-11-22 14:32:09 +01003865 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
Johannes Berg9caf0362012-11-29 01:25:20 +01003866 rcu_read_unlock();
Johannes Berg63f170e2009-12-23 13:15:33 +01003867
Kalle Valoab133152010-01-12 10:42:31 +02003868 if (bss->wmm_used && bss->uapsd_supported &&
3869 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)) {
Johannes Berg76f03032012-03-08 15:02:05 +01003870 assoc_data->uapsd = true;
Kalle Valoab133152010-01-12 10:42:31 +02003871 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
3872 } else {
Johannes Berg76f03032012-03-08 15:02:05 +01003873 assoc_data->uapsd = false;
Kalle Valoab133152010-01-12 10:42:31 +02003874 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
3875 }
3876
Johannes Berg77fdaa12009-07-07 03:45:17 +02003877 if (req->prev_bssid)
Johannes Berg66e67e42012-01-20 13:55:27 +01003878 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
Johannes Berg77fdaa12009-07-07 03:45:17 +02003879
3880 if (req->use_mfp) {
3881 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
3882 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
3883 } else {
3884 ifmgd->mfp = IEEE80211_MFP_DISABLED;
3885 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
3886 }
3887
3888 if (req->crypto.control_port)
3889 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
3890 else
3891 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
3892
Johannes Berga621fa42010-08-27 14:26:54 +03003893 sdata->control_port_protocol = req->crypto.control_port_ethertype;
3894 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
3895
Johannes Berg66e67e42012-01-20 13:55:27 +01003896 /* kick off associate process */
3897
3898 ifmgd->assoc_data = assoc_data;
3899
Johannes Berga1cf7752012-03-08 15:02:07 +01003900 err = ieee80211_prep_connection(sdata, req->bss, true);
3901 if (err)
3902 goto err_clear;
Johannes Berg66e67e42012-01-20 13:55:27 +01003903
3904 if (!bss->dtim_period &&
3905 sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
3906 /*
3907 * Wait up to one beacon interval ...
3908 * should this be more if we miss one?
3909 */
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003910 sdata_info(sdata, "waiting for beacon from %pM\n",
3911 ifmgd->bssid);
Johannes Berg3f9768a2012-03-28 21:02:46 +02003912 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
Johannes Berg66e67e42012-01-20 13:55:27 +01003913 } else {
3914 assoc_data->have_beacon = true;
3915 assoc_data->sent_assoc = false;
3916 assoc_data->timeout = jiffies;
3917 }
3918 run_again(ifmgd, assoc_data->timeout);
3919
Paul Stewartfcff4f12012-02-23 17:59:53 -08003920 if (bss->corrupt_data) {
3921 char *corrupt_type = "data";
3922 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
3923 if (bss->corrupt_data &
3924 IEEE80211_BSS_CORRUPT_PROBE_RESP)
3925 corrupt_type = "beacon and probe response";
3926 else
3927 corrupt_type = "beacon";
3928 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
3929 corrupt_type = "probe response";
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003930 sdata_info(sdata, "associating with AP with corrupt %s\n",
3931 corrupt_type);
Paul Stewartfcff4f12012-02-23 17:59:53 -08003932 }
3933
Johannes Berg66e67e42012-01-20 13:55:27 +01003934 err = 0;
3935 goto out;
3936 err_clear:
Eliad Peller3d2abdf2012-09-04 17:44:45 +03003937 memset(ifmgd->bssid, 0, ETH_ALEN);
3938 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
Johannes Berg66e67e42012-01-20 13:55:27 +01003939 ifmgd->assoc_data = NULL;
3940 err_free:
3941 kfree(assoc_data);
3942 out:
3943 mutex_unlock(&ifmgd->mtx);
3944
3945 return err;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003946}
3947
3948int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
Johannes Berg63c9c5e2012-02-24 13:50:51 +01003949 struct cfg80211_deauth_request *req)
Johannes Berg77fdaa12009-07-07 03:45:17 +02003950{
3951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Antonio Quartulli6ae16772012-09-07 13:28:52 +02003952 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
Stanislaw Gruszka68632552012-10-15 14:52:41 +02003953 bool tx = !req->local_state_change;
Johannes Berg86552012012-10-29 09:46:31 +01003954 bool sent_frame = false;
Johannes Berg77fdaa12009-07-07 03:45:17 +02003955
Johannes Berg77fdaa12009-07-07 03:45:17 +02003956 mutex_lock(&ifmgd->mtx);
3957
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02003958 sdata_info(sdata,
3959 "deauthenticating from %pM by local choice (reason=%d)\n",
3960 req->bssid, req->reason_code);
Johannes Berg0ff71612009-09-26 14:45:41 +02003961
Johannes Berg86552012012-10-29 09:46:31 +01003962 if (ifmgd->auth_data) {
Emmanuel Grumbach8c7d8572012-07-25 01:42:36 +03003963 drv_mgd_prepare_tx(sdata->local, sdata);
Johannes Berg37ad3882012-02-24 13:50:54 +01003964 ieee80211_send_deauth_disassoc(sdata, req->bssid,
3965 IEEE80211_STYPE_DEAUTH,
Stanislaw Gruszka68632552012-10-15 14:52:41 +02003966 req->reason_code, tx,
Johannes Berg37ad3882012-02-24 13:50:54 +01003967 frame_buf);
Johannes Berg86552012012-10-29 09:46:31 +01003968 ieee80211_destroy_auth_data(sdata, false);
3969 mutex_unlock(&ifmgd->mtx);
3970
3971 sent_frame = tx;
3972 goto out;
Emmanuel Grumbach8c7d8572012-07-25 01:42:36 +03003973 }
3974
Johannes Berg86552012012-10-29 09:46:31 +01003975 if (ifmgd->associated &&
3976 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
3977 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3978 req->reason_code, tx, frame_buf);
3979 sent_frame = tx;
3980 }
Johannes Berg37ad3882012-02-24 13:50:54 +01003981 mutex_unlock(&ifmgd->mtx);
3982
Johannes Berg86552012012-10-29 09:46:31 +01003983 out:
Johannes Berg7da7cc12010-08-05 17:02:38 +02003984 mutex_lock(&sdata->local->mtx);
Johannes Bergbc83b682009-11-29 12:19:06 +01003985 ieee80211_recalc_idle(sdata->local);
Johannes Berg7da7cc12010-08-05 17:02:38 +02003986 mutex_unlock(&sdata->local->mtx);
Johannes Bergbc83b682009-11-29 12:19:06 +01003987
Johannes Berg86552012012-10-29 09:46:31 +01003988 if (sent_frame)
3989 __cfg80211_send_deauth(sdata->dev, frame_buf,
3990 IEEE80211_DEAUTH_FRAME_LEN);
3991
Johannes Berg77fdaa12009-07-07 03:45:17 +02003992 return 0;
3993}
3994
3995int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
Johannes Berg63c9c5e2012-02-24 13:50:51 +01003996 struct cfg80211_disassoc_request *req)
Johannes Berg77fdaa12009-07-07 03:45:17 +02003997{
3998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
Jouni Malinene69e95d2010-03-29 23:29:31 -07003999 u8 bssid[ETH_ALEN];
Antonio Quartulli6ae16772012-09-07 13:28:52 +02004000 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
Johannes Berg77fdaa12009-07-07 03:45:17 +02004001
Johannes Berg77fdaa12009-07-07 03:45:17 +02004002 mutex_lock(&ifmgd->mtx);
4003
Johannes Berg8d8b2612009-07-25 11:58:36 +02004004 /*
4005 * cfg80211 should catch this ... but it's racy since
4006 * we can receive a disassoc frame, process it, hand it
4007 * to cfg80211 while that's in a locked section already
4008 * trying to tell us that the user wants to disconnect.
4009 */
Johannes Berg0c1ad2c2009-12-23 13:15:39 +01004010 if (ifmgd->associated != req->bss) {
Johannes Berg77fdaa12009-07-07 03:45:17 +02004011 mutex_unlock(&ifmgd->mtx);
4012 return -ENOLINK;
4013 }
4014
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02004015 sdata_info(sdata,
4016 "disassociating from %pM by local choice (reason=%d)\n",
4017 req->bss->bssid, req->reason_code);
Johannes Berg0ff71612009-09-26 14:45:41 +02004018
Jouni Malinene69e95d2010-03-29 23:29:31 -07004019 memcpy(bssid, req->bss->bssid, ETH_ALEN);
Johannes Berg37ad3882012-02-24 13:50:54 +01004020 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4021 req->reason_code, !req->local_state_change,
4022 frame_buf);
Johannes Berg77fdaa12009-07-07 03:45:17 +02004023 mutex_unlock(&ifmgd->mtx);
4024
Antonio Quartulli6ae16772012-09-07 13:28:52 +02004025 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4026 IEEE80211_DEAUTH_FRAME_LEN);
Johannes Bergbc83b682009-11-29 12:19:06 +01004027
Johannes Berg7da7cc12010-08-05 17:02:38 +02004028 mutex_lock(&sdata->local->mtx);
Johannes Bergbc83b682009-11-29 12:19:06 +01004029 ieee80211_recalc_idle(sdata->local);
Johannes Berg7da7cc12010-08-05 17:02:38 +02004030 mutex_unlock(&sdata->local->mtx);
Johannes Bergbc83b682009-11-29 12:19:06 +01004031
Johannes Berg77fdaa12009-07-07 03:45:17 +02004032 return 0;
4033}
Jouni Malinen026331c2010-02-15 12:53:10 +02004034
Eliad Pellerafa762f2012-04-23 14:45:15 +03004035void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
Johannes Berg54e4ffb2012-02-25 21:48:08 +01004036{
4037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4038
4039 mutex_lock(&ifmgd->mtx);
4040 if (ifmgd->assoc_data)
4041 ieee80211_destroy_assoc_data(sdata, false);
4042 if (ifmgd->auth_data)
4043 ieee80211_destroy_auth_data(sdata, false);
4044 del_timer_sync(&ifmgd->timer);
4045 mutex_unlock(&ifmgd->mtx);
4046}
4047
Juuso Oikarinena97c13c2010-03-23 09:02:34 +02004048void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4049 enum nl80211_cqm_rssi_threshold_event rssi_event,
4050 gfp_t gfp)
4051{
4052 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4053
Johannes Bergb5878a22010-04-07 16:48:40 +02004054 trace_api_cqm_rssi_notify(sdata, rssi_event);
4055
Juuso Oikarinena97c13c2010-03-23 09:02:34 +02004056 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4057}
4058EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);