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Johannes Bergc2d15602007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040016#include <linux/export.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020017#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020022#include <linux/bitmap.h>
Johannes Bergdd769862011-11-18 16:54:50 +010023#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020025#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010026#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020027
28#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"
Luis Carlos Coboee385852008-02-23 15:17:11 +010031#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020032#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020033#include "led.h"
Johannes Bergfffd0932009-07-08 14:22:54 +020034#include "wep.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020035
36/* privid for wiphys to determine whether they belong to us or not */
37void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080039struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020048
Ron Rindjunsky71364712007-12-25 17:00:36 +020049u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020050 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020051{
Harvey Harrisona494bb12008-06-11 14:21:58 -070052 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020053
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020054 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020056 return NULL;
57
Harvey Harrisona494bb12008-06-11 14:21:58 -070058 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020059 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070061
62 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020063 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070064 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020067 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070068
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020073 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020075 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070076 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if(ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020080 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070081
82 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020083 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020084 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020085 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020086 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020088 return hdr->addr1;
89 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070090 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020091 }
92 }
Johannes Bergc2d15602007-07-27 15:43:23 +020093 }
94
95 return NULL;
96}
97
Johannes Berg5cf121c2008-02-25 16:27:43 +010098void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +020099{
Johannes Berg252b86c2011-11-16 15:28:55 +0100100 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100101 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200102
Johannes Berg252b86c2011-11-16 15:28:55 +0100103 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
Johannes Berg252b86c2011-11-16 15:28:55 +0100106 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200107}
108
Michal Kazior4ee73f32012-04-11 08:47:56 +0200109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
Johannes Bergc2d15602007-07-27 15:43:23 +0200110 int rate, int erp, int short_preamble)
111{
112 int dur;
113
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
117 * also include SIFS.
118 *
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
121 */
122
Michal Kazior4ee73f32012-04-11 08:47:56 +0200123 if (band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200124 /*
125 * OFDM:
126 *
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
131 *
132 * T_SYM = 4 usec
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
136 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200137 dur = 16; /* SIFS + signal ext */
138 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate); /* T_SYM x N_SYM */
142 } else {
143 /*
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
147 *
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
152 */
153 dur = 10; /* aSIFSTime = 10 usec */
154 dur += short_preamble ? (72 + 24) : (144 + 48);
155
156 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
157 }
158
159 return dur;
160}
161
162/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100163__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164 struct ieee80211_vif *vif,
Michal Kazior4ee73f32012-04-11 08:47:56 +0200165 enum ieee80211_band band,
Johannes Berg8318d782008-01-24 19:38:38 +0100166 size_t frame_len,
167 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200168{
Johannes Berg25d834e2008-09-12 22:52:47 +0200169 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200170 u16 dur;
171 int erp;
Johannes Berg25d834e2008-09-12 22:52:47 +0200172 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200173
Johannes Berg8318d782008-01-24 19:38:38 +0100174 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200175 if (vif) {
176 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
180 }
Johannes Berg8318d782008-01-24 19:38:38 +0100181
Michal Kazior4ee73f32012-04-11 08:47:56 +0200182 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
Johannes Berg25d834e2008-09-12 22:52:47 +0200183 short_preamble);
Johannes Bergc2d15602007-07-27 15:43:23 +0200184
185 return cpu_to_le16(dur);
186}
187EXPORT_SYMBOL(ieee80211_generic_frame_duration);
188
Johannes Berg32bfd352007-12-19 01:31:26 +0100189__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200191 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200192{
193 struct ieee80211_local *local = hw_to_local(hw);
194 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200195 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100196 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200197 int erp;
198 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200199 struct ieee80211_supported_band *sband;
200
Michal Kazior4ee73f32012-04-11 08:47:56 +0200201 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200202
Johannes Berg25d834e2008-09-12 22:52:47 +0200203 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200204
Johannes Berge039fa42008-05-15 12:55:29 +0200205 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100206
207 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200208 if (vif) {
209 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200210 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200211 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212 erp = rate->flags & IEEE80211_RATE_ERP_G;
213 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200214
215 /* CTS duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200216 dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200217 erp, short_preamble);
218 /* Data frame duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200219 dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200220 erp, short_preamble);
221 /* ACK duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200222 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200223 erp, short_preamble);
224
225 return cpu_to_le16(dur);
226}
227EXPORT_SYMBOL(ieee80211_rts_duration);
228
Johannes Berg32bfd352007-12-19 01:31:26 +0100229__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200231 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200232 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200233{
234 struct ieee80211_local *local = hw_to_local(hw);
235 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200236 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100237 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200238 int erp;
239 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200240 struct ieee80211_supported_band *sband;
241
Michal Kazior4ee73f32012-04-11 08:47:56 +0200242 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200243
Johannes Berg25d834e2008-09-12 22:52:47 +0200244 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200245
Johannes Berge039fa42008-05-15 12:55:29 +0200246 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100247 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200248 if (vif) {
249 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200250 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200251 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252 erp = rate->flags & IEEE80211_RATE_ERP_G;
253 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200254
255 /* Data frame duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200256 dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200257 erp, short_preamble);
Johannes Berge039fa42008-05-15 12:55:29 +0200258 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200259 /* ACK duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200260 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200261 erp, short_preamble);
262 }
263
Johannes Bergc2d15602007-07-27 15:43:23 +0200264 return cpu_to_le16(dur);
265}
266EXPORT_SYMBOL(ieee80211_ctstoself_duration);
267
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200268void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
269{
270 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200271 int n_acs = IEEE80211_NUM_ACS;
272
273 if (local->hw.queues < IEEE80211_NUM_ACS)
274 n_acs = 1;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200275
276 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
277 int ac;
278
Johannes Bergf142c6b2012-06-18 20:07:15 +0200279 if (!sdata->dev)
280 continue;
281
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200282 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
283 continue;
284
285 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
286 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
287 continue;
288
Johannes Berga6f38ac2012-07-04 12:49:59 +0200289 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200290 int ac_queue = sdata->vif.hw_queue[ac];
291
292 if (ac_queue == queue ||
293 (sdata->vif.cab_queue == queue &&
294 local->queue_stop_reasons[ac_queue] == 0 &&
295 skb_queue_empty(&local->pending[ac_queue])))
296 netif_wake_subqueue(sdata->dev, ac);
297 }
298 }
299}
300
Kalle Valoce7c9112008-12-18 23:35:20 +0200301static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
302 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200303{
304 struct ieee80211_local *local = hw_to_local(hw);
305
Johannes Bergb5878a22010-04-07 16:48:40 +0200306 trace_wake_queue(local, queue, reason);
307
Johannes Berge4e72fb2009-03-23 17:28:42 +0100308 if (WARN_ON(queue >= hw->queues))
309 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200310
Johannes Bergada15122012-03-28 11:04:27 +0200311 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
312 return;
313
Johannes Berg96f5e662009-02-12 00:51:53 +0100314 __clear_bit(reason, &local->queue_stop_reasons[queue]);
315
316 if (local->queue_stop_reasons[queue] != 0)
317 /* someone still has this queue stopped */
318 return;
319
Johannes Berg7236fe22010-03-22 13:42:43 -0700320 if (skb_queue_empty(&local->pending[queue])) {
321 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200322 ieee80211_propagate_queue_wake(local, queue);
Johannes Berg7236fe22010-03-22 13:42:43 -0700323 rcu_read_unlock();
324 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200325 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200326}
Kalle Valoce7c9112008-12-18 23:35:20 +0200327
Johannes Berg96f5e662009-02-12 00:51:53 +0100328void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
329 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200330{
331 struct ieee80211_local *local = hw_to_local(hw);
332 unsigned long flags;
333
334 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335 __ieee80211_wake_queue(hw, queue, reason);
336 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
337}
338
339void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
340{
341 ieee80211_wake_queue_by_reason(hw, queue,
342 IEEE80211_QUEUE_STOP_REASON_DRIVER);
343}
Johannes Bergc2d15602007-07-27 15:43:23 +0200344EXPORT_SYMBOL(ieee80211_wake_queue);
345
Kalle Valoce7c9112008-12-18 23:35:20 +0200346static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200348{
349 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100350 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200351 int n_acs = IEEE80211_NUM_ACS;
Johannes Bergc2d15602007-07-27 15:43:23 +0200352
Johannes Bergb5878a22010-04-07 16:48:40 +0200353 trace_stop_queue(local, queue, reason);
354
Johannes Berge4e72fb2009-03-23 17:28:42 +0100355 if (WARN_ON(queue >= hw->queues))
356 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100357
Johannes Bergada15122012-03-28 11:04:27 +0200358 if (test_bit(reason, &local->queue_stop_reasons[queue]))
359 return;
360
Johannes Berg2a577d92009-03-23 17:28:37 +0100361 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100362
Johannes Berga6f38ac2012-07-04 12:49:59 +0200363 if (local->hw.queues < IEEE80211_NUM_ACS)
364 n_acs = 1;
365
Johannes Bergcf0277e2010-01-05 18:00:58 +0100366 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200367 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
368 int ac;
369
Johannes Bergf142c6b2012-06-18 20:07:15 +0200370 if (!sdata->dev)
371 continue;
372
Johannes Berga6f38ac2012-07-04 12:49:59 +0200373 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200374 if (sdata->vif.hw_queue[ac] == queue ||
375 sdata->vif.cab_queue == queue)
376 netif_stop_subqueue(sdata->dev, ac);
377 }
378 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100379 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200380}
Kalle Valoce7c9112008-12-18 23:35:20 +0200381
Johannes Berg96f5e662009-02-12 00:51:53 +0100382void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
383 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200384{
385 struct ieee80211_local *local = hw_to_local(hw);
386 unsigned long flags;
387
388 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
389 __ieee80211_stop_queue(hw, queue, reason);
390 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
391}
392
393void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
394{
395 ieee80211_stop_queue_by_reason(hw, queue,
396 IEEE80211_QUEUE_STOP_REASON_DRIVER);
397}
Johannes Bergc2d15602007-07-27 15:43:23 +0200398EXPORT_SYMBOL(ieee80211_stop_queue);
399
Johannes Berg8f77f382009-06-07 21:58:37 +0200400void ieee80211_add_pending_skb(struct ieee80211_local *local,
401 struct sk_buff *skb)
402{
403 struct ieee80211_hw *hw = &local->hw;
404 unsigned long flags;
Johannes Berga7bc3762009-07-27 10:33:31 +0200405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200406 int queue = info->hw_queue;
Johannes Berga7bc3762009-07-27 10:33:31 +0200407
408 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200409 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200410 return;
411 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200412
413 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
414 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200415 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200416 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
417 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418}
419
Johannes Bergb0b97a82011-09-29 16:04:30 +0200420void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
421 struct sk_buff_head *skbs,
422 void (*fn)(void *data), void *data)
Johannes Berg8f77f382009-06-07 21:58:37 +0200423{
424 struct ieee80211_hw *hw = &local->hw;
425 struct sk_buff *skb;
426 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200427 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200428
429 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200430 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432
433 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200434 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200435 continue;
436 }
437
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200438 queue = info->hw_queue;
Johannes Berg4644ae82012-03-28 11:04:28 +0200439
440 __ieee80211_stop_queue(hw, queue,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
442
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200443 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200444 }
445
Johannes Berg50a94322010-11-16 11:50:28 -0800446 if (fn)
447 fn(data);
448
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200449 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200450 __ieee80211_wake_queue(hw, i,
451 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg8f77f382009-06-07 21:58:37 +0200452 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200453}
454
Kalle Valoce7c9112008-12-18 23:35:20 +0200455void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
456 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200457{
Kalle Valoce7c9112008-12-18 23:35:20 +0200458 struct ieee80211_local *local = hw_to_local(hw);
459 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200460 int i;
461
Kalle Valoce7c9112008-12-18 23:35:20 +0200462 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
463
Johannes Berg96f5e662009-02-12 00:51:53 +0100464 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200465 __ieee80211_stop_queue(hw, i, reason);
466
467 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
468}
469
470void ieee80211_stop_queues(struct ieee80211_hw *hw)
471{
472 ieee80211_stop_queues_by_reason(hw,
473 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200474}
475EXPORT_SYMBOL(ieee80211_stop_queues);
476
Tomas Winkler92ab8532008-07-24 21:02:04 +0300477int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
478{
479 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200480 unsigned long flags;
481 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100482
Johannes Berge4e72fb2009-03-23 17:28:42 +0100483 if (WARN_ON(queue >= hw->queues))
484 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100485
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 ret = !!local->queue_stop_reasons[queue];
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300490}
491EXPORT_SYMBOL(ieee80211_queue_stopped);
492
Kalle Valoce7c9112008-12-18 23:35:20 +0200493void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200495{
Kalle Valoce7c9112008-12-18 23:35:20 +0200496 struct ieee80211_local *local = hw_to_local(hw);
497 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200498 int i;
499
Kalle Valoce7c9112008-12-18 23:35:20 +0200500 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
501
Johannes Berge4e72fb2009-03-23 17:28:42 +0100502 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200503 __ieee80211_wake_queue(hw, i, reason);
504
505 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506}
507
508void ieee80211_wake_queues(struct ieee80211_hw *hw)
509{
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200511}
512EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100513
Johannes Berg32bfd352007-12-19 01:31:26 +0100514void ieee80211_iterate_active_interfaces(
Johannes Berg8b2c9822012-11-06 20:23:30 +0100515 struct ieee80211_hw *hw, u32 iter_flags,
Johannes Berg32bfd352007-12-19 01:31:26 +0100516 void (*iterator)(void *data, u8 *mac,
517 struct ieee80211_vif *vif),
518 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100519{
520 struct ieee80211_local *local = hw_to_local(hw);
521 struct ieee80211_sub_if_data *sdata;
522
Johannes Bergc771c9d2009-01-23 22:54:03 +0100523 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200524
525 list_for_each_entry(sdata, &local->interfaces, list) {
526 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200527 case NL80211_IFTYPE_MONITOR:
528 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200529 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200530 default:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200531 break;
532 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100533 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
534 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
535 continue;
Johannes Berg9607e6b2009-12-23 13:15:31 +0100536 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100537 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200538 &sdata->vif);
539 }
540
Johannes Berg685fb722012-07-11 16:38:09 +0200541 sdata = rcu_dereference_protected(local->monitor_sdata,
542 lockdep_is_held(&local->iflist_mtx));
Johannes Berg8b2c9822012-11-06 20:23:30 +0100543 if (sdata &&
544 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
545 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200546 iterator(data, sdata->vif.addr, &sdata->vif);
547
Johannes Bergc771c9d2009-01-23 22:54:03 +0100548 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200549}
550EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
551
552void ieee80211_iterate_active_interfaces_atomic(
Johannes Berg8b2c9822012-11-06 20:23:30 +0100553 struct ieee80211_hw *hw, u32 iter_flags,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200554 void (*iterator)(void *data, u8 *mac,
555 struct ieee80211_vif *vif),
556 void *data)
557{
558 struct ieee80211_local *local = hw_to_local(hw);
559 struct ieee80211_sub_if_data *sdata;
560
Johannes Berge38bad42007-11-28 10:55:32 +0100561 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100562
Johannes Berge38bad42007-11-28 10:55:32 +0100563 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100564 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200565 case NL80211_IFTYPE_MONITOR:
566 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100567 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200568 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100569 break;
570 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100571 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
572 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
573 continue;
Johannes Berg9607e6b2009-12-23 13:15:31 +0100574 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100575 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100576 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100577 }
Johannes Berge38bad42007-11-28 10:55:32 +0100578
Johannes Berg685fb722012-07-11 16:38:09 +0200579 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg8b2c9822012-11-06 20:23:30 +0100580 if (sdata &&
581 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
582 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200583 iterator(data, sdata->vif.addr, &sdata->vif);
584
Johannes Berge38bad42007-11-28 10:55:32 +0100585 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100586}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200587EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200588
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400589/*
590 * Nothing should have been stuffed into the workqueue during
591 * the suspend->resume cycle. If this WARN is seen then there
592 * is a bug with either the driver suspend or something in
593 * mac80211 stuffing into the workqueue which we haven't yet
594 * cleared during mac80211's suspend cycle.
595 */
596static bool ieee80211_can_queue_work(struct ieee80211_local *local)
597{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100598 if (WARN(local->suspended && !local->resuming,
599 "queueing ieee80211 work while going to suspend\n"))
600 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400601
602 return true;
603}
604
605void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
606{
607 struct ieee80211_local *local = hw_to_local(hw);
608
609 if (!ieee80211_can_queue_work(local))
610 return;
611
612 queue_work(local->workqueue, work);
613}
614EXPORT_SYMBOL(ieee80211_queue_work);
615
616void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
617 struct delayed_work *dwork,
618 unsigned long delay)
619{
620 struct ieee80211_local *local = hw_to_local(hw);
621
622 if (!ieee80211_can_queue_work(local))
623 return;
624
625 queue_delayed_work(local->workqueue, dwork, delay);
626}
627EXPORT_SYMBOL(ieee80211_queue_delayed_work);
628
Johannes Bergdd769862011-11-18 16:54:50 +0100629u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
630 struct ieee802_11_elems *elems,
631 u64 filter, u32 crc)
632{
633 size_t left = len;
634 u8 *pos = start;
635 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800636 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100637
Paul Stewartfcff4f12012-02-23 17:59:53 -0800638 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100639 memset(elems, 0, sizeof(*elems));
640 elems->ie_start = start;
641 elems->total_len = len;
642
643 while (left >= 2) {
644 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800645 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100646
647 id = *pos++;
648 elen = *pos++;
649 left -= 2;
650
Paul Stewartfcff4f12012-02-23 17:59:53 -0800651 if (elen > left) {
652 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100653 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800654 }
655
Johannes Berg9690fb12012-10-24 14:19:53 +0200656 switch (id) {
657 case WLAN_EID_SSID:
658 case WLAN_EID_SUPP_RATES:
659 case WLAN_EID_FH_PARAMS:
660 case WLAN_EID_DS_PARAMS:
661 case WLAN_EID_CF_PARAMS:
662 case WLAN_EID_TIM:
663 case WLAN_EID_IBSS_PARAMS:
664 case WLAN_EID_CHALLENGE:
665 case WLAN_EID_RSN:
666 case WLAN_EID_ERP_INFO:
667 case WLAN_EID_EXT_SUPP_RATES:
668 case WLAN_EID_HT_CAPABILITY:
669 case WLAN_EID_HT_OPERATION:
670 case WLAN_EID_VHT_CAPABILITY:
671 case WLAN_EID_VHT_OPERATION:
672 case WLAN_EID_MESH_ID:
673 case WLAN_EID_MESH_CONFIG:
674 case WLAN_EID_PEER_MGMT:
675 case WLAN_EID_PREQ:
676 case WLAN_EID_PREP:
677 case WLAN_EID_PERR:
678 case WLAN_EID_RANN:
679 case WLAN_EID_CHANNEL_SWITCH:
680 case WLAN_EID_EXT_CHANSWITCH_ANN:
681 case WLAN_EID_COUNTRY:
682 case WLAN_EID_PWR_CONSTRAINT:
683 case WLAN_EID_TIMEOUT_INTERVAL:
684 if (test_bit(id, seen_elems)) {
685 elems->parse_error = true;
686 left -= elen;
687 pos += elen;
688 continue;
689 }
690 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800691 }
Johannes Bergdd769862011-11-18 16:54:50 +0100692
693 if (calc_crc && id < 64 && (filter & (1ULL << id)))
694 crc = crc32_be(crc, pos - 2, elen + 2);
695
Paul Stewartfcff4f12012-02-23 17:59:53 -0800696 elem_parse_failed = false;
697
Johannes Bergdd769862011-11-18 16:54:50 +0100698 switch (id) {
699 case WLAN_EID_SSID:
700 elems->ssid = pos;
701 elems->ssid_len = elen;
702 break;
703 case WLAN_EID_SUPP_RATES:
704 elems->supp_rates = pos;
705 elems->supp_rates_len = elen;
706 break;
707 case WLAN_EID_FH_PARAMS:
708 elems->fh_params = pos;
709 elems->fh_params_len = elen;
710 break;
711 case WLAN_EID_DS_PARAMS:
712 elems->ds_params = pos;
713 elems->ds_params_len = elen;
714 break;
715 case WLAN_EID_CF_PARAMS:
716 elems->cf_params = pos;
717 elems->cf_params_len = elen;
718 break;
719 case WLAN_EID_TIM:
720 if (elen >= sizeof(struct ieee80211_tim_ie)) {
721 elems->tim = (void *)pos;
722 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800723 } else
724 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100725 break;
726 case WLAN_EID_IBSS_PARAMS:
727 elems->ibss_params = pos;
728 elems->ibss_params_len = elen;
729 break;
730 case WLAN_EID_CHALLENGE:
731 elems->challenge = pos;
732 elems->challenge_len = elen;
733 break;
734 case WLAN_EID_VENDOR_SPECIFIC:
735 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
736 pos[2] == 0xf2) {
737 /* Microsoft OUI (00:50:F2) */
738
739 if (calc_crc)
740 crc = crc32_be(crc, pos - 2, elen + 2);
741
742 if (pos[3] == 1) {
743 /* OUI Type 1 - WPA IE */
744 elems->wpa = pos;
745 elems->wpa_len = elen;
746 } else if (elen >= 5 && pos[3] == 2) {
747 /* OUI Type 2 - WMM IE */
748 if (pos[4] == 0) {
749 elems->wmm_info = pos;
750 elems->wmm_info_len = elen;
751 } else if (pos[4] == 1) {
752 elems->wmm_param = pos;
753 elems->wmm_param_len = elen;
754 }
755 }
756 }
757 break;
758 case WLAN_EID_RSN:
759 elems->rsn = pos;
760 elems->rsn_len = elen;
761 break;
762 case WLAN_EID_ERP_INFO:
763 elems->erp_info = pos;
764 elems->erp_info_len = elen;
765 break;
766 case WLAN_EID_EXT_SUPP_RATES:
767 elems->ext_supp_rates = pos;
768 elems->ext_supp_rates_len = elen;
769 break;
770 case WLAN_EID_HT_CAPABILITY:
771 if (elen >= sizeof(struct ieee80211_ht_cap))
772 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800773 else
774 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100775 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100776 case WLAN_EID_HT_OPERATION:
777 if (elen >= sizeof(struct ieee80211_ht_operation))
778 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800779 else
780 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100781 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000782 case WLAN_EID_VHT_CAPABILITY:
783 if (elen >= sizeof(struct ieee80211_vht_cap))
784 elems->vht_cap_elem = (void *)pos;
785 else
786 elem_parse_failed = true;
787 break;
788 case WLAN_EID_VHT_OPERATION:
789 if (elen >= sizeof(struct ieee80211_vht_operation))
790 elems->vht_operation = (void *)pos;
791 else
792 elem_parse_failed = true;
793 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100794 case WLAN_EID_MESH_ID:
795 elems->mesh_id = pos;
796 elems->mesh_id_len = elen;
797 break;
798 case WLAN_EID_MESH_CONFIG:
799 if (elen >= sizeof(struct ieee80211_meshconf_ie))
800 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800801 else
802 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100803 break;
804 case WLAN_EID_PEER_MGMT:
805 elems->peering = pos;
806 elems->peering_len = elen;
807 break;
808 case WLAN_EID_PREQ:
809 elems->preq = pos;
810 elems->preq_len = elen;
811 break;
812 case WLAN_EID_PREP:
813 elems->prep = pos;
814 elems->prep_len = elen;
815 break;
816 case WLAN_EID_PERR:
817 elems->perr = pos;
818 elems->perr_len = elen;
819 break;
820 case WLAN_EID_RANN:
821 if (elen >= sizeof(struct ieee80211_rann_ie))
822 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800823 else
824 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100825 break;
826 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200827 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
828 elem_parse_failed = true;
829 break;
830 }
831 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100832 break;
833 case WLAN_EID_QUIET:
834 if (!elems->quiet_elem) {
835 elems->quiet_elem = pos;
836 elems->quiet_elem_len = elen;
837 }
838 elems->num_of_quiet_elem++;
839 break;
840 case WLAN_EID_COUNTRY:
841 elems->country_elem = pos;
842 elems->country_elem_len = elen;
843 break;
844 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +0200845 if (elen != 1) {
846 elem_parse_failed = true;
847 break;
848 }
Johannes Bergdd769862011-11-18 16:54:50 +0100849 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100850 break;
851 case WLAN_EID_TIMEOUT_INTERVAL:
852 elems->timeout_int = pos;
853 elems->timeout_int_len = elen;
854 break;
855 default:
856 break;
857 }
858
Paul Stewartfcff4f12012-02-23 17:59:53 -0800859 if (elem_parse_failed)
860 elems->parse_error = true;
861 else
Johannes Berg5df45692012-10-24 14:22:37 +0200862 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -0800863
Johannes Bergdd769862011-11-18 16:54:50 +0100864 left -= elen;
865 pos += elen;
866 }
867
Paul Stewartfcff4f12012-02-23 17:59:53 -0800868 if (left != 0)
869 elems->parse_error = true;
870
Johannes Bergdd769862011-11-18 16:54:50 +0100871 return crc;
872}
873
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200874void ieee802_11_parse_elems(u8 *start, size_t len,
875 struct ieee802_11_elems *elems)
876{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200877 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
878}
879
Johannes Berg3abead52012-03-02 15:56:59 +0100880void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
881 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200882{
883 struct ieee80211_local *local = sdata->local;
884 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +0200885 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +0200886 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200887 bool use_11b, enable_qos;
Johannes Bergaa837e12009-05-07 16:16:24 +0200888 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200889
890 if (!local->ops->conf_tx)
891 return;
892
Johannes Berg54bcbc62012-03-28 11:04:25 +0200893 if (local->hw.queues < IEEE80211_NUM_ACS)
894 return;
895
Johannes Berg5825fe102008-09-09 12:56:01 +0200896 memset(&qparam, 0, sizeof(qparam));
897
Johannes Berg55de9082012-07-26 17:24:39 +0200898 rcu_read_lock();
899 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
900 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +0100901 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +0200902 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +0200903 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +0200904
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200905 /*
906 * By default disable QoS in STA mode for old access points, which do
907 * not support 802.11e. New APs will provide proper queue parameters,
908 * that we will configure later.
909 */
910 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
911
Johannes Berg54bcbc62012-03-28 11:04:25 +0200912 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
Johannes Bergaa837e12009-05-07 16:16:24 +0200913 /* Set defaults according to 802.11-2007 Table 7-37 */
914 aCWmax = 1023;
915 if (use_11b)
916 aCWmin = 31;
917 else
918 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200919
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200920 if (enable_qos) {
921 switch (ac) {
922 case IEEE80211_AC_BK:
923 qparam.cw_max = aCWmax;
924 qparam.cw_min = aCWmin;
925 qparam.txop = 0;
926 qparam.aifs = 7;
927 break;
928 /* never happens but let's not leave undefined */
929 default:
930 case IEEE80211_AC_BE:
931 qparam.cw_max = aCWmax;
932 qparam.cw_min = aCWmin;
933 qparam.txop = 0;
934 qparam.aifs = 3;
935 break;
936 case IEEE80211_AC_VI:
937 qparam.cw_max = aCWmin;
938 qparam.cw_min = (aCWmin + 1) / 2 - 1;
939 if (use_11b)
940 qparam.txop = 6016/32;
941 else
942 qparam.txop = 3008/32;
943 qparam.aifs = 2;
944 break;
945 case IEEE80211_AC_VO:
946 qparam.cw_max = (aCWmin + 1) / 2 - 1;
947 qparam.cw_min = (aCWmin + 1) / 4 - 1;
948 if (use_11b)
949 qparam.txop = 3264/32;
950 else
951 qparam.txop = 1504/32;
952 qparam.aifs = 2;
953 break;
954 }
955 } else {
956 /* Confiure old 802.11b/g medium access rules. */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200957 qparam.cw_max = aCWmax;
958 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200959 qparam.txop = 0;
Johannes Bergaa837e12009-05-07 16:16:24 +0200960 qparam.aifs = 2;
Johannes Bergaa837e12009-05-07 16:16:24 +0200961 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200962
Kalle Valoab133152010-01-12 10:42:31 +0200963 qparam.uapsd = false;
964
Johannes Berg54bcbc62012-03-28 11:04:25 +0200965 sdata->tx_conf[ac] = qparam;
966 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +0200967 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200968
Johannes Bergf142c6b2012-06-18 20:07:15 +0200969 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
970 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200971 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +0100972 if (bss_notify)
973 ieee80211_bss_info_change_notify(sdata,
974 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +0530975 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200976}
Johannes Berge50db652008-09-09 15:07:09 +0200977
Johannes Berg46900292009-02-15 12:44:28 +0100978void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
979 const size_t supp_rates_len,
980 const u8 *supp_rates)
981{
Johannes Berg55de9082012-07-26 17:24:39 +0200982 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg46900292009-02-15 12:44:28 +0100983 int i, have_higher_than_11mbit = 0;
984
985 /* cf. IEEE 802.11 9.2.12 */
986 for (i = 0; i < supp_rates_len; i++)
987 if ((supp_rates[i] & 0x7f) * 5 > 110)
988 have_higher_than_11mbit = 1;
989
Johannes Berg55de9082012-07-26 17:24:39 +0200990 rcu_read_lock();
991 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
992
993 if (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +0100994 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
Johannes Berg46900292009-02-15 12:44:28 +0100995 have_higher_than_11mbit)
996 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
997 else
998 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Johannes Berg55de9082012-07-26 17:24:39 +0200999 rcu_read_unlock();
Johannes Berg46900292009-02-15 12:44:28 +01001000
Johannes Berg3abead52012-03-02 15:56:59 +01001001 ieee80211_set_wmm_default(sdata, true);
Johannes Berg46900292009-02-15 12:44:28 +01001002}
1003
Johannes Berg881d9482009-01-21 15:13:48 +01001004u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +02001005 enum ieee80211_band band)
1006{
1007 struct ieee80211_supported_band *sband;
1008 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +01001009 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +02001010 enum ieee80211_rate_flags mandatory_flag;
1011 int i;
1012
1013 sband = local->hw.wiphy->bands[band];
Michal Kazior4ee73f32012-04-11 08:47:56 +02001014 if (WARN_ON(!sband))
1015 return 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +02001016
1017 if (band == IEEE80211_BAND_2GHZ)
1018 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
1019 else
1020 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
1021
1022 bitrates = sband->bitrates;
1023 mandatory_rates = 0;
1024 for (i = 0; i < sband->n_bitrates; i++)
1025 if (bitrates[i].flags & mandatory_flag)
1026 mandatory_rates |= BIT(i);
1027 return mandatory_rates;
1028}
Johannes Berg46900292009-02-15 12:44:28 +01001029
1030void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001031 u16 transaction, u16 auth_alg, u16 status,
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001032 u8 *extra, size_t extra_len, const u8 *da,
1033 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +01001034{
1035 struct ieee80211_local *local = sdata->local;
1036 struct sk_buff *skb;
1037 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001038 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001039
1040 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +02001041 sizeof(*mgmt) + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -07001042 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001043 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001044
Johannes Berg46900292009-02-15 12:44:28 +01001045 skb_reserve(skb, local->hw.extra_tx_headroom);
1046
1047 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1048 memset(mgmt, 0, 24 + 6);
1049 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1050 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001051 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001052 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001053 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1054 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1055 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001056 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001057 if (extra)
1058 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001059
Johannes Bergfffd0932009-07-08 14:22:54 +02001060 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1061 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1062 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1063 WARN_ON(err);
1064 }
1065
Johannes Berg62ae67b2009-11-18 18:42:05 +01001066 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1067 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001068}
1069
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001070void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1071 const u8 *bssid, u16 stype, u16 reason,
1072 bool send_frame, u8 *frame_buf)
1073{
1074 struct ieee80211_local *local = sdata->local;
1075 struct sk_buff *skb;
1076 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1077
1078 /* build frame */
1079 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1080 mgmt->duration = 0; /* initialize only */
1081 mgmt->seq_ctrl = 0; /* initialize only */
1082 memcpy(mgmt->da, bssid, ETH_ALEN);
1083 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1084 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1085 /* u.deauth.reason_code == u.disassoc.reason_code */
1086 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1087
1088 if (send_frame) {
1089 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1090 IEEE80211_DEAUTH_FRAME_LEN);
1091 if (!skb)
1092 return;
1093
1094 skb_reserve(skb, local->hw.extra_tx_headroom);
1095
1096 /* copy in frame */
1097 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1098 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1099
1100 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1101 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1102 IEEE80211_SKB_CB(skb)->flags |=
1103 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1104
1105 ieee80211_tx_skb(sdata, skb);
1106 }
1107}
1108
Johannes Bergde95a542009-04-01 11:58:36 +02001109int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Bergc604b9f2012-11-29 12:45:18 +01001110 size_t buffer_len, const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +03001111 enum ieee80211_band band, u32 rate_mask,
1112 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +02001113{
1114 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001115 u8 *pos = buffer, *end = buffer + buffer_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001116 size_t offset = 0, noffset;
1117 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001118 u8 rates[32];
1119 int num_rates;
1120 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001121
Johannes Berg4d36ec582009-10-27 20:59:55 +01001122 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001123 if (WARN_ON_ONCE(!sband))
1124 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001125
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001126 num_rates = 0;
1127 for (i = 0; i < sband->n_bitrates; i++) {
1128 if ((BIT(i) & rate_mask) == 0)
1129 continue; /* skip rate */
1130 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1131 }
1132
1133 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001134
Johannes Bergc604b9f2012-11-29 12:45:18 +01001135 if (end - pos < 2 + supp_rates_len)
1136 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001137 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001138 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001139 memcpy(pos, rates, supp_rates_len);
1140 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001141
Johannes Berg8e664fb2009-12-23 13:15:38 +01001142 /* insert "request information" if in custom IEs */
1143 if (ie && ie_len) {
1144 static const u8 before_extrates[] = {
1145 WLAN_EID_SSID,
1146 WLAN_EID_SUPP_RATES,
1147 WLAN_EID_REQUEST,
1148 };
1149 noffset = ieee80211_ie_split(ie, ie_len,
1150 before_extrates,
1151 ARRAY_SIZE(before_extrates),
1152 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001153 if (end - pos < noffset - offset)
1154 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001155 memcpy(pos, ie + offset, noffset - offset);
1156 pos += noffset - offset;
1157 offset = noffset;
1158 }
Johannes Bergde95a542009-04-01 11:58:36 +02001159
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001160 ext_rates_len = num_rates - supp_rates_len;
1161 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001162 if (end - pos < 2 + ext_rates_len)
1163 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001164 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001165 *pos++ = ext_rates_len;
1166 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1167 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001168 }
1169
Jouni Malinen651b5222010-08-28 19:37:51 +03001170 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001171 if (end - pos < 3)
1172 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001173 *pos++ = WLAN_EID_DS_PARAMS;
1174 *pos++ = 1;
1175 *pos++ = channel;
1176 }
1177
Johannes Berg8e664fb2009-12-23 13:15:38 +01001178 /* insert custom IEs that go before HT */
1179 if (ie && ie_len) {
1180 static const u8 before_ht[] = {
1181 WLAN_EID_SSID,
1182 WLAN_EID_SUPP_RATES,
1183 WLAN_EID_REQUEST,
1184 WLAN_EID_EXT_SUPP_RATES,
1185 WLAN_EID_DS_PARAMS,
1186 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1187 };
1188 noffset = ieee80211_ie_split(ie, ie_len,
1189 before_ht, ARRAY_SIZE(before_ht),
1190 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001191 if (end - pos < noffset - offset)
1192 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001193 memcpy(pos, ie + offset, noffset - offset);
1194 pos += noffset - offset;
1195 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001196 }
1197
Johannes Bergc604b9f2012-11-29 12:45:18 +01001198 if (sband->ht_cap.ht_supported) {
1199 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1200 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001201 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1202 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001203 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001204
Johannes Bergde95a542009-04-01 11:58:36 +02001205 /*
1206 * If adding more here, adjust code in main.c
1207 * that calculates local->scan_ies_len.
1208 */
1209
Johannes Berg8e664fb2009-12-23 13:15:38 +01001210 /* add any remaining custom IEs */
1211 if (ie && ie_len) {
1212 noffset = ie_len;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001213 if (end - pos < noffset - offset)
1214 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001215 memcpy(pos, ie + offset, noffset - offset);
1216 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001217 }
1218
Johannes Bergc604b9f2012-11-29 12:45:18 +01001219 if (sband->vht_cap.vht_supported) {
1220 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1221 goto out_err;
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001222 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1223 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001224 }
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001225
Johannes Bergde95a542009-04-01 11:58:36 +02001226 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001227 out_err:
1228 WARN_ONCE(1, "not enough space for preq IEs\n");
1229 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001230}
1231
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001232struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001233 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001234 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001235 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001236 const u8 *ie, size_t ie_len,
1237 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001238{
1239 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001240 struct sk_buff *skb;
1241 struct ieee80211_mgmt *mgmt;
Johannes Berg6b778632012-07-23 14:53:27 +02001242 u8 chan_no;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001243 int ies_len;
Johannes Berg46900292009-02-15 12:44:28 +01001244
Paul Stewarta806c552011-06-23 09:00:11 -08001245 /*
1246 * Do not send DS Channel parameter for directed probe requests
1247 * in order to maximize the chance that we get a response. Some
1248 * badly-behaved APs don't respond when this parameter is included.
1249 */
1250 if (directed)
Johannes Berg6b778632012-07-23 14:53:27 +02001251 chan_no = 0;
Paul Stewarta806c552011-06-23 09:00:11 -08001252 else
Johannes Berg6b778632012-07-23 14:53:27 +02001253 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001254
Kalle Valo7c12ce82010-01-05 20:16:44 +02001255 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001256 ssid, ssid_len, 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001257 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001258 return NULL;
1259
1260 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1261 skb_tailroom(skb),
Johannes Bergc604b9f2012-11-29 12:45:18 +01001262 ie, ie_len, chan->band,
Johannes Berg62ae67b2009-11-18 18:42:05 +01001263 ratemask, chan_no);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001264 skb_put(skb, ies_len);
Johannes Berg46900292009-02-15 12:44:28 +01001265
1266 if (dst) {
1267 mgmt = (struct ieee80211_mgmt *) skb->data;
1268 memcpy(mgmt->da, dst, ETH_ALEN);
1269 memcpy(mgmt->bssid, dst, ETH_ALEN);
1270 }
1271
1272 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001273
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001274 return skb;
1275}
1276
1277void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1278 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001279 const u8 *ie, size_t ie_len,
Johannes Bergfe94fe02012-07-30 12:26:34 +02001280 u32 ratemask, bool directed, bool no_cck,
Johannes Berg55de9082012-07-26 17:24:39 +02001281 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001282{
1283 struct sk_buff *skb;
1284
Johannes Bergfe94fe02012-07-30 12:26:34 +02001285 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001286 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001287 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301288 if (skb) {
1289 if (no_cck)
1290 IEEE80211_SKB_CB(skb)->flags |=
1291 IEEE80211_TX_CTL_NO_CCK_RATE;
Johannes Berg55de9082012-07-26 17:24:39 +02001292 if (scan)
1293 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1294 else
1295 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301296 }
Johannes Berg46900292009-02-15 12:44:28 +01001297}
1298
1299u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1300 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001301 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001302{
1303 struct ieee80211_supported_band *sband;
1304 struct ieee80211_rate *bitrates;
1305 size_t num_rates;
1306 u32 supp_rates;
1307 int i, j;
1308 sband = local->hw.wiphy->bands[band];
1309
Michal Kazior4ee73f32012-04-11 08:47:56 +02001310 if (WARN_ON(!sband))
1311 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001312
1313 bitrates = sband->bitrates;
1314 num_rates = sband->n_bitrates;
1315 supp_rates = 0;
1316 for (i = 0; i < elems->supp_rates_len +
1317 elems->ext_supp_rates_len; i++) {
1318 u8 rate = 0;
1319 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001320 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001321 if (i < elems->supp_rates_len)
1322 rate = elems->supp_rates[i];
1323 else if (elems->ext_supp_rates)
1324 rate = elems->ext_supp_rates
1325 [i - elems->supp_rates_len];
1326 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001327 is_basic = !!(rate & 0x80);
1328
1329 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1330 continue;
1331
1332 for (j = 0; j < num_rates; j++) {
1333 if (bitrates[j].bitrate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001334 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001335 if (basic_rates && is_basic)
1336 *basic_rates |= BIT(j);
1337 }
1338 }
Johannes Berg46900292009-02-15 12:44:28 +01001339 }
1340 return supp_rates;
1341}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001342
Johannes Berg84f6a012009-08-20 20:02:20 +02001343void ieee80211_stop_device(struct ieee80211_local *local)
1344{
1345 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001346 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001347
1348 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001349
1350 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001351 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001352}
1353
Johannes Bergf2753dd2009-04-14 10:09:24 +02001354int ieee80211_reconfig(struct ieee80211_local *local)
1355{
1356 struct ieee80211_hw *hw = &local->hw;
1357 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001358 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001359 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001360 int res, i;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001361
Johannes Bergeecc4802011-05-04 15:37:29 +02001362#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001363 if (local->suspended)
1364 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001365
Johannes Bergeecc4802011-05-04 15:37:29 +02001366 if (local->wowlan) {
1367 local->wowlan = false;
1368 res = drv_resume(local);
1369 if (res < 0) {
1370 local->resuming = false;
1371 return res;
1372 }
1373 if (res == 0)
1374 goto wake_up;
1375 WARN_ON(res > 1);
1376 /*
1377 * res is 1, which means the driver requested
1378 * to go through a regular reset on wakeup.
1379 */
1380 }
1381#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001382 /* everything else happens only if HW was up & running */
1383 if (!local->open_count)
1384 goto wake_up;
1385
1386 /*
1387 * Upon resume hardware can sometimes be goofy due to
1388 * various platform / driver / bus issues, so restarting
1389 * the device may at times not work immediately. Propagate
1390 * the error.
1391 */
1392 res = drv_start(local);
1393 if (res) {
1394 WARN(local->suspended, "Hardware became unavailable "
1395 "upon resume. This could be a software issue "
1396 "prior to suspend or a hardware issue.\n");
1397 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001398 }
1399
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301400 /* setup fragmentation threshold */
1401 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1402
1403 /* setup RTS threshold */
1404 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1405
1406 /* reset coverage class */
1407 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1408
Johannes Berg94f9b972011-07-14 16:48:54 +02001409 ieee80211_led_radio(local, true);
1410 ieee80211_mod_tpt_led_trig(local,
1411 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1412
Johannes Bergf2753dd2009-04-14 10:09:24 +02001413 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001414 sdata = rtnl_dereference(local->monitor_sdata);
1415 if (sdata) {
1416 res = drv_add_interface(local, sdata);
1417 if (WARN_ON(res)) {
1418 rcu_assign_pointer(local->monitor_sdata, NULL);
1419 synchronize_net();
1420 kfree(sdata);
1421 }
1422 }
1423
Johannes Bergf2753dd2009-04-14 10:09:24 +02001424 list_for_each_entry(sdata, &local->interfaces, list) {
1425 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1426 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001427 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001428 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001429 }
1430
Johannes Berg55de9082012-07-26 17:24:39 +02001431 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001432 if (local->use_chanctx) {
1433 mutex_lock(&local->chanctx_mtx);
1434 list_for_each_entry(ctx, &local->chanctx_list, list)
1435 WARN_ON(drv_add_chanctx(local, ctx));
1436 mutex_unlock(&local->chanctx_mtx);
1437 }
Johannes Berg55de9082012-07-26 17:24:39 +02001438
Johannes Berg6352c872012-11-07 12:40:41 +01001439 list_for_each_entry(sdata, &local->interfaces, list) {
1440 struct ieee80211_chanctx_conf *ctx_conf;
1441
1442 if (!ieee80211_sdata_running(sdata))
1443 continue;
1444
1445 mutex_lock(&local->chanctx_mtx);
1446 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1447 lockdep_is_held(&local->chanctx_mtx));
1448 if (ctx_conf) {
1449 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1450 conf);
1451 drv_assign_vif_chanctx(local, sdata, ctx);
1452 }
1453 mutex_unlock(&local->chanctx_mtx);
1454 }
1455
Johannes Bergfe5f2552012-11-19 22:19:08 +01001456 sdata = rtnl_dereference(local->monitor_sdata);
1457 if (sdata && local->use_chanctx && ieee80211_sdata_running(sdata)) {
1458 struct ieee80211_chanctx_conf *ctx_conf;
1459
1460 mutex_lock(&local->chanctx_mtx);
1461 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1462 lockdep_is_held(&local->chanctx_mtx));
1463 if (ctx_conf) {
1464 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1465 conf);
1466 drv_assign_vif_chanctx(local, sdata, ctx);
1467 }
1468 mutex_unlock(&local->chanctx_mtx);
1469 }
1470
Johannes Bergf2753dd2009-04-14 10:09:24 +02001471 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001472 mutex_lock(&local->sta_mtx);
1473 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001474 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001475
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001476 if (!sta->uploaded)
1477 continue;
1478
1479 /* AP-mode stations will be added later */
1480 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1481 continue;
1482
1483 for (state = IEEE80211_STA_NOTEXIST;
1484 state < sta->sta_state; state++)
1485 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1486 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001487 }
Johannes Berg34e89502010-02-03 13:59:58 +01001488 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001489
Eliad Peller2683d652011-07-14 20:29:42 +03001490 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001491 if (hw->queues >= IEEE80211_NUM_ACS) {
1492 list_for_each_entry(sdata, &local->interfaces, list) {
1493 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1494 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1495 !ieee80211_sdata_running(sdata))
1496 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001497
Johannes Berg54bcbc62012-03-28 11:04:25 +02001498 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1499 drv_conf_tx(local, sdata, i,
1500 &sdata->tx_conf[i]);
1501 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001502 }
Eliad Peller2683d652011-07-14 20:29:42 +03001503
Johannes Bergf2753dd2009-04-14 10:09:24 +02001504 /* reconfigure hardware */
1505 ieee80211_hw_config(local, ~0);
1506
Johannes Bergf2753dd2009-04-14 10:09:24 +02001507 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001508
1509 /* Finally also reconfigure all the BSS information */
1510 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001511 u32 changed;
1512
Johannes Berg9607e6b2009-12-23 13:15:31 +01001513 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001514 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001515
1516 /* common change flags for all interface types */
1517 changed = BSS_CHANGED_ERP_CTS_PROT |
1518 BSS_CHANGED_ERP_PREAMBLE |
1519 BSS_CHANGED_ERP_SLOT |
1520 BSS_CHANGED_HT |
1521 BSS_CHANGED_BASIC_RATES |
1522 BSS_CHANGED_BEACON_INT |
1523 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001524 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001525 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001526 BSS_CHANGED_IDLE |
1527 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001528
Johannes Bergf2753dd2009-04-14 10:09:24 +02001529 switch (sdata->vif.type) {
1530 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001531 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001532 BSS_CHANGED_ARP_FILTER |
1533 BSS_CHANGED_PS;
Eliad Pellera7b545f2011-02-08 18:43:19 +02001534 mutex_lock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001535 ieee80211_bss_info_change_notify(sdata, changed);
Eliad Pellera7b545f2011-02-08 18:43:19 +02001536 mutex_unlock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001537 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001538 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001539 changed |= BSS_CHANGED_IBSS;
1540 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001541 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001542 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001543
Johannes Berg10416382012-10-19 15:44:42 +02001544 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001545 changed |= BSS_CHANGED_AP_PROBE_RESP;
1546
Johannes Berg10416382012-10-19 15:44:42 +02001547 if (rcu_access_pointer(sdata->u.ap.beacon))
1548 drv_start_ap(local, sdata);
1549 }
1550
Arik Nemtsov78274932011-09-04 11:11:32 +03001551 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001552 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001553 changed |= BSS_CHANGED_BEACON |
1554 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001555 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001556 break;
1557 case NL80211_IFTYPE_WDS:
1558 break;
1559 case NL80211_IFTYPE_AP_VLAN:
1560 case NL80211_IFTYPE_MONITOR:
1561 /* ignore virtual */
1562 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001563 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf142c6b2012-06-18 20:07:15 +02001564 changed = BSS_CHANGED_IDLE;
1565 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001566 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001567 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001568 case NL80211_IFTYPE_P2P_CLIENT:
1569 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001570 WARN_ON(1);
1571 break;
1572 }
1573 }
1574
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001575 ieee80211_recalc_ps(local, -1);
1576
Johannes Berg2a419052010-06-10 10:21:29 +02001577 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001578 * The sta might be in psm against the ap (e.g. because
1579 * this was the state before a hw restart), so we
1580 * explicitly send a null packet in order to make sure
1581 * it'll sync against the ap (and get out of psm).
1582 */
1583 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1584 list_for_each_entry(sdata, &local->interfaces, list) {
1585 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1586 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001587 if (!sdata->u.mgd.associated)
1588 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001589
1590 ieee80211_send_nullfunc(local, sdata, 0);
1591 }
1592 }
1593
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001594 /* APs are now beaconing, add back stations */
1595 mutex_lock(&local->sta_mtx);
1596 list_for_each_entry(sta, &local->sta_list, list) {
1597 enum ieee80211_sta_state state;
1598
1599 if (!sta->uploaded)
1600 continue;
1601
1602 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1603 continue;
1604
1605 for (state = IEEE80211_STA_NOTEXIST;
1606 state < sta->sta_state; state++)
1607 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1608 state + 1));
1609 }
1610 mutex_unlock(&local->sta_mtx);
1611
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001612 /* add back keys */
1613 list_for_each_entry(sdata, &local->interfaces, list)
1614 if (ieee80211_sdata_running(sdata))
1615 ieee80211_enable_keys(sdata);
1616
Eliad Pellerc6209482012-07-02 15:08:25 +03001617 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001618 local->in_reconfig = false;
1619 barrier();
1620
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001621 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001622 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1623 * sessions can be established after a resume.
1624 *
1625 * Also tear down aggregation sessions since reconfiguring
1626 * them in a hardware restart scenario is not easily done
1627 * right now, and the hardware will have lost information
1628 * about the sessions, but we and the AP still think they
1629 * are active. This is really a workaround though.
1630 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001631 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001632 mutex_lock(&local->sta_mtx);
1633
1634 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg53f73c02010-10-05 19:37:40 +02001635 ieee80211_sta_tear_down_BA_sessions(sta, true);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001636 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001637 }
Johannes Berg2a419052010-06-10 10:21:29 +02001638
1639 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001640 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001641
Johannes Bergf2753dd2009-04-14 10:09:24 +02001642 ieee80211_wake_queues_by_reason(hw,
1643 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1644
Johannes Berg5bb644a2009-05-17 11:40:42 +02001645 /*
1646 * If this is for hw restart things are still running.
1647 * We may want to change that later, however.
1648 */
Johannes Berg9214ad72012-11-06 19:18:13 +01001649 if (!local->suspended) {
1650 drv_restart_complete(local);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001651 return 0;
Johannes Berg9214ad72012-11-06 19:18:13 +01001652 }
Johannes Berg5bb644a2009-05-17 11:40:42 +02001653
1654#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001655 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001656 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001657 mb();
1658 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001659
1660 list_for_each_entry(sdata, &local->interfaces, list) {
1661 switch(sdata->vif.type) {
1662 case NL80211_IFTYPE_STATION:
1663 ieee80211_sta_restart(sdata);
1664 break;
1665 case NL80211_IFTYPE_ADHOC:
1666 ieee80211_ibss_restart(sdata);
1667 break;
1668 case NL80211_IFTYPE_MESH_POINT:
1669 ieee80211_mesh_restart(sdata);
1670 break;
1671 default:
1672 break;
1673 }
1674 }
1675
Johannes Berg26d59532011-04-01 13:52:48 +02001676 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001677
Johannes Berg34e89502010-02-03 13:59:58 +01001678 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001679 list_for_each_entry(sta, &local->sta_list, list)
1680 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001681 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001682#else
1683 WARN_ON(1);
1684#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001685 return 0;
1686}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001687
Johannes Berg95acac62011-07-12 12:30:59 +02001688void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1689{
1690 struct ieee80211_sub_if_data *sdata;
1691 struct ieee80211_local *local;
1692 struct ieee80211_key *key;
1693
1694 if (WARN_ON(!vif))
1695 return;
1696
1697 sdata = vif_to_sdata(vif);
1698 local = sdata->local;
1699
1700 if (WARN_ON(!local->resuming))
1701 return;
1702
1703 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1704 return;
1705
1706 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1707
1708 mutex_lock(&local->key_mtx);
1709 list_for_each_entry(key, &sdata->key_list, list)
1710 key->flags |= KEY_FLAG_TAINTED;
1711 mutex_unlock(&local->key_mtx);
1712}
1713EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1714
Johannes Berg04ecd252012-09-11 14:34:12 +02001715void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01001716{
Johannes Berg04ecd252012-09-11 14:34:12 +02001717 struct ieee80211_local *local = sdata->local;
1718 struct ieee80211_chanctx_conf *chanctx_conf;
1719 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01001720
Johannes Berg04ecd252012-09-11 14:34:12 +02001721 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001722
Johannes Berg04ecd252012-09-11 14:34:12 +02001723 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1724 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01001725
Johannes Berg04ecd252012-09-11 14:34:12 +02001726 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02001727 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01001728
Johannes Berg04ecd252012-09-11 14:34:12 +02001729 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1730 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02001731 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02001732 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001733}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001734
1735static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1736{
1737 int i;
1738
1739 for (i = 0; i < n_ids; i++)
1740 if (ids[i] == id)
1741 return true;
1742 return false;
1743}
1744
1745/**
1746 * ieee80211_ie_split - split an IE buffer according to ordering
1747 *
1748 * @ies: the IE buffer
1749 * @ielen: the length of the IE buffer
1750 * @ids: an array with element IDs that are allowed before
1751 * the split
1752 * @n_ids: the size of the element ID array
1753 * @offset: offset where to start splitting in the buffer
1754 *
1755 * This function splits an IE buffer by updating the @offset
1756 * variable to point to the location where the buffer should be
1757 * split.
1758 *
1759 * It assumes that the given IE buffer is well-formed, this
1760 * has to be guaranteed by the caller!
1761 *
1762 * It also assumes that the IEs in the buffer are ordered
1763 * correctly, if not the result of using this function will not
1764 * be ordered correctly either, i.e. it does no reordering.
1765 *
1766 * The function returns the offset where the next part of the
1767 * buffer starts, which may be @ielen if the entire (remainder)
1768 * of the buffer should be used.
1769 */
1770size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1771 const u8 *ids, int n_ids, size_t offset)
1772{
1773 size_t pos = offset;
1774
1775 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1776 pos += 2 + ies[pos + 1];
1777
1778 return pos;
1779}
1780
1781size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1782{
1783 size_t pos = offset;
1784
1785 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1786 pos += 2 + ies[pos + 1];
1787
1788 return pos;
1789}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001790
1791static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1792 int rssi_min_thold,
1793 int rssi_max_thold)
1794{
1795 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1796
1797 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1798 return;
1799
1800 /*
1801 * Scale up threshold values before storing it, as the RSSI averaging
1802 * algorithm uses a scaled up value as well. Change this scaling
1803 * factor if the RSSI averaging algorithm changes.
1804 */
1805 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1806 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1807}
1808
1809void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1810 int rssi_min_thold,
1811 int rssi_max_thold)
1812{
1813 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1814
1815 WARN_ON(rssi_min_thold == rssi_max_thold ||
1816 rssi_min_thold > rssi_max_thold);
1817
1818 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1819 rssi_max_thold);
1820}
1821EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1822
1823void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1824{
1825 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1826
1827 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1828}
1829EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03001830
Ben Greearef96a8422011-11-18 11:32:00 -08001831u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001832 u16 cap)
1833{
1834 __le16 tmp;
1835
1836 *pos++ = WLAN_EID_HT_CAPABILITY;
1837 *pos++ = sizeof(struct ieee80211_ht_cap);
1838 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1839
1840 /* capability flags */
1841 tmp = cpu_to_le16(cap);
1842 memcpy(pos, &tmp, sizeof(u16));
1843 pos += sizeof(u16);
1844
1845 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001846 *pos++ = ht_cap->ampdu_factor |
1847 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07001848 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1849
1850 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08001851 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1852 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001853
1854 /* extended capabilities */
1855 pos += sizeof(__le16);
1856
1857 /* BF capabilities */
1858 pos += sizeof(__le32);
1859
1860 /* antenna selection */
1861 pos += sizeof(u8);
1862
1863 return pos;
1864}
1865
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001866u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1867 u32 cap)
1868{
1869 __le32 tmp;
1870
1871 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00001872 *pos++ = sizeof(struct ieee80211_vht_cap);
1873 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001874
1875 /* capability flags */
1876 tmp = cpu_to_le32(cap);
1877 memcpy(pos, &tmp, sizeof(u32));
1878 pos += sizeof(u32);
1879
1880 /* VHT MCS set */
1881 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1882 pos += sizeof(vht_cap->vht_mcs);
1883
1884 return pos;
1885}
1886
Johannes Berg074d46d2012-03-15 19:45:16 +01001887u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01001888 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001889 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001890{
Johannes Berg074d46d2012-03-15 19:45:16 +01001891 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001892 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01001893 *pos++ = WLAN_EID_HT_OPERATION;
1894 *pos++ = sizeof(struct ieee80211_ht_operation);
1895 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01001896 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1897 chandef->chan->center_freq);
1898 switch (chandef->width) {
1899 case NL80211_CHAN_WIDTH_160:
1900 case NL80211_CHAN_WIDTH_80P80:
1901 case NL80211_CHAN_WIDTH_80:
1902 case NL80211_CHAN_WIDTH_40:
1903 if (chandef->center_freq1 > chandef->chan->center_freq)
1904 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1905 else
1906 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001907 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001908 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01001909 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001910 break;
1911 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07001912 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001913 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1914 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01001915 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01001916
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001917 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01001918 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001919
1920 /* It seems that Basic MCS set and Supported MCS set
1921 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01001922 memset(&ht_oper->basic_set, 0, 16);
1923 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001924
Johannes Berg074d46d2012-03-15 19:45:16 +01001925 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001926}
1927
Johannes Berg4bf88532012-11-09 11:39:59 +01001928void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
1929 struct ieee80211_ht_operation *ht_oper,
1930 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001931{
1932 enum nl80211_channel_type channel_type;
1933
Johannes Berg4bf88532012-11-09 11:39:59 +01001934 if (!ht_oper) {
1935 cfg80211_chandef_create(chandef, control_chan,
1936 NL80211_CHAN_NO_HT);
1937 return;
1938 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07001939
Johannes Berg074d46d2012-03-15 19:45:16 +01001940 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07001941 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1942 channel_type = NL80211_CHAN_HT20;
1943 break;
1944 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1945 channel_type = NL80211_CHAN_HT40PLUS;
1946 break;
1947 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1948 channel_type = NL80211_CHAN_HT40MINUS;
1949 break;
1950 default:
1951 channel_type = NL80211_CHAN_NO_HT;
1952 }
1953
Johannes Berg4bf88532012-11-09 11:39:59 +01001954 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001955}
1956
Johannes Bergfc8a7322012-06-28 10:33:25 +02001957int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02001958 struct sk_buff *skb, bool need_basic,
1959 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03001960{
Arik Nemtsov768db342011-09-28 14:12:51 +03001961 struct ieee80211_local *local = sdata->local;
1962 struct ieee80211_supported_band *sband;
1963 int rate;
1964 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02001965 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03001966
Johannes Berg6b778632012-07-23 14:53:27 +02001967 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03001968 rates = sband->n_bitrates;
1969 if (rates > 8)
1970 rates = 8;
1971
1972 if (skb_tailroom(skb) < rates + 2)
1973 return -ENOMEM;
1974
1975 pos = skb_put(skb, rates + 2);
1976 *pos++ = WLAN_EID_SUPP_RATES;
1977 *pos++ = rates;
1978 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001979 u8 basic = 0;
1980 if (need_basic && basic_rates & BIT(i))
1981 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03001982 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001983 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03001984 }
1985
1986 return 0;
1987}
1988
Johannes Bergfc8a7322012-06-28 10:33:25 +02001989int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02001990 struct sk_buff *skb, bool need_basic,
1991 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03001992{
Arik Nemtsov768db342011-09-28 14:12:51 +03001993 struct ieee80211_local *local = sdata->local;
1994 struct ieee80211_supported_band *sband;
1995 int rate;
1996 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02001997 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03001998
Johannes Berg6b778632012-07-23 14:53:27 +02001999 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03002000 exrates = sband->n_bitrates;
2001 if (exrates > 8)
2002 exrates -= 8;
2003 else
2004 exrates = 0;
2005
2006 if (skb_tailroom(skb) < exrates + 2)
2007 return -ENOMEM;
2008
2009 if (exrates) {
2010 pos = skb_put(skb, exrates + 2);
2011 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2012 *pos++ = exrates;
2013 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002014 u8 basic = 0;
2015 if (need_basic && basic_rates & BIT(i))
2016 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03002017 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002018 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03002019 }
2020 }
2021 return 0;
2022}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002023
2024int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2025{
2026 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2028
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002029 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2030 /* non-managed type inferfaces */
2031 return 0;
2032 }
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002033 return ifmgd->ave_beacon_signal;
2034}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002035EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002036
2037u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2038{
2039 if (!mcs)
2040 return 1;
2041
2042 /* TODO: consider rx_highest */
2043
2044 if (mcs->rx_mask[3])
2045 return 4;
2046 if (mcs->rx_mask[2])
2047 return 3;
2048 if (mcs->rx_mask[1])
2049 return 2;
2050 return 1;
2051}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002052
2053/**
2054 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2055 * @local: mac80211 hw info struct
2056 * @status: RX status
2057 * @mpdu_len: total MPDU length (including FCS)
2058 * @mpdu_offset: offset into MPDU to calculate timestamp at
2059 *
2060 * This function calculates the RX timestamp at the given MPDU offset, taking
2061 * into account what the RX timestamp was. An offset of 0 will just normalize
2062 * the timestamp to TSF at beginning of MPDU reception.
2063 */
2064u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2065 struct ieee80211_rx_status *status,
2066 unsigned int mpdu_len,
2067 unsigned int mpdu_offset)
2068{
2069 u64 ts = status->mactime;
2070 struct rate_info ri;
2071 u16 rate;
2072
2073 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2074 return 0;
2075
2076 memset(&ri, 0, sizeof(ri));
2077
2078 /* Fill cfg80211 rate info */
2079 if (status->flag & RX_FLAG_HT) {
2080 ri.mcs = status->rate_idx;
2081 ri.flags |= RATE_INFO_FLAGS_MCS;
2082 if (status->flag & RX_FLAG_40MHZ)
2083 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2084 if (status->flag & RX_FLAG_SHORT_GI)
2085 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002086 } else if (status->flag & RX_FLAG_VHT) {
2087 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2088 ri.mcs = status->rate_idx;
2089 ri.nss = status->vht_nss;
2090 if (status->flag & RX_FLAG_40MHZ)
2091 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2092 if (status->flag & RX_FLAG_80MHZ)
2093 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2094 if (status->flag & RX_FLAG_80P80MHZ)
2095 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2096 if (status->flag & RX_FLAG_160MHZ)
2097 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2098 if (status->flag & RX_FLAG_SHORT_GI)
2099 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002100 } else {
2101 struct ieee80211_supported_band *sband;
2102
2103 sband = local->hw.wiphy->bands[status->band];
2104 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2105 }
2106
2107 rate = cfg80211_calculate_bitrate(&ri);
2108
2109 /* rewind from end of MPDU */
2110 if (status->flag & RX_FLAG_MACTIME_END)
2111 ts -= mpdu_len * 8 * 10 / rate;
2112
2113 ts += mpdu_offset * 8 * 10 / rate;
2114
2115 return ts;
2116}