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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,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100456 unsigned long queues,
457 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200458{
Kalle Valoce7c9112008-12-18 23:35:20 +0200459 struct ieee80211_local *local = hw_to_local(hw);
460 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200461 int i;
462
Kalle Valoce7c9112008-12-18 23:35:20 +0200463 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
464
Johannes Berg445ea4e2013-02-13 12:25:28 +0100465 for_each_set_bit(i, &queues, hw->queues)
Kalle Valoce7c9112008-12-18 23:35:20 +0200466 __ieee80211_stop_queue(hw, i, reason);
467
468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
469}
470
471void ieee80211_stop_queues(struct ieee80211_hw *hw)
472{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100473 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Kalle Valoce7c9112008-12-18 23:35:20 +0200474 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200475}
476EXPORT_SYMBOL(ieee80211_stop_queues);
477
Tomas Winkler92ab8532008-07-24 21:02:04 +0300478int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
479{
480 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200481 unsigned long flags;
482 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100483
Johannes Berge4e72fb2009-03-23 17:28:42 +0100484 if (WARN_ON(queue >= hw->queues))
485 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100486
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200487 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Thomas Pedersen2419ea12013-04-10 15:41:40 -0700488 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
489 &local->queue_stop_reasons[queue]);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200490 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
491 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300492}
493EXPORT_SYMBOL(ieee80211_queue_stopped);
494
Kalle Valoce7c9112008-12-18 23:35:20 +0200495void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100496 unsigned long queues,
Kalle Valoce7c9112008-12-18 23:35:20 +0200497 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200498{
Kalle Valoce7c9112008-12-18 23:35:20 +0200499 struct ieee80211_local *local = hw_to_local(hw);
500 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200501 int i;
502
Kalle Valoce7c9112008-12-18 23:35:20 +0200503 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
504
Johannes Berg445ea4e2013-02-13 12:25:28 +0100505 for_each_set_bit(i, &queues, hw->queues)
Kalle Valoce7c9112008-12-18 23:35:20 +0200506 __ieee80211_wake_queue(hw, i, reason);
507
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
509}
510
511void ieee80211_wake_queues(struct ieee80211_hw *hw)
512{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100513 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
514 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200515}
516EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100517
Johannes Berg39ecc012013-02-13 12:11:00 +0100518void ieee80211_flush_queues(struct ieee80211_local *local,
519 struct ieee80211_sub_if_data *sdata)
520{
521 u32 queues;
522
523 if (!local->ops->flush)
524 return;
525
526 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
527 int ac;
528
529 queues = 0;
530
531 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
532 queues |= BIT(sdata->vif.hw_queue[ac]);
533 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
534 queues |= BIT(sdata->vif.cab_queue);
535 } else {
536 /* all queues */
537 queues = BIT(local->hw.queues) - 1;
538 }
539
Johannes Berg445ea4e2013-02-13 12:25:28 +0100540 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
541 IEEE80211_QUEUE_STOP_REASON_FLUSH);
542
Johannes Berg39ecc012013-02-13 12:11:00 +0100543 drv_flush(local, queues, false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100544
545 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
546 IEEE80211_QUEUE_STOP_REASON_FLUSH);
Johannes Berg39ecc012013-02-13 12:11:00 +0100547}
548
Johannes Berg32bfd352007-12-19 01:31:26 +0100549void ieee80211_iterate_active_interfaces(
Johannes Berg8b2c9822012-11-06 20:23:30 +0100550 struct ieee80211_hw *hw, u32 iter_flags,
Johannes Berg32bfd352007-12-19 01:31:26 +0100551 void (*iterator)(void *data, u8 *mac,
552 struct ieee80211_vif *vif),
553 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100554{
555 struct ieee80211_local *local = hw_to_local(hw);
556 struct ieee80211_sub_if_data *sdata;
557
Johannes Bergc771c9d2009-01-23 22:54:03 +0100558 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200559
560 list_for_each_entry(sdata, &local->interfaces, list) {
561 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200562 case NL80211_IFTYPE_MONITOR:
563 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200564 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200565 default:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200566 break;
567 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100568 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
569 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
570 continue;
Johannes Berg9607e6b2009-12-23 13:15:31 +0100571 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100572 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200573 &sdata->vif);
574 }
575
Johannes Berg685fb722012-07-11 16:38:09 +0200576 sdata = rcu_dereference_protected(local->monitor_sdata,
577 lockdep_is_held(&local->iflist_mtx));
Johannes Berg8b2c9822012-11-06 20:23:30 +0100578 if (sdata &&
579 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
580 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200581 iterator(data, sdata->vif.addr, &sdata->vif);
582
Johannes Bergc771c9d2009-01-23 22:54:03 +0100583 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200584}
585EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
586
587void ieee80211_iterate_active_interfaces_atomic(
Johannes Berg8b2c9822012-11-06 20:23:30 +0100588 struct ieee80211_hw *hw, u32 iter_flags,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200589 void (*iterator)(void *data, u8 *mac,
590 struct ieee80211_vif *vif),
591 void *data)
592{
593 struct ieee80211_local *local = hw_to_local(hw);
594 struct ieee80211_sub_if_data *sdata;
595
Johannes Berge38bad42007-11-28 10:55:32 +0100596 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100597
Johannes Berge38bad42007-11-28 10:55:32 +0100598 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100599 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200600 case NL80211_IFTYPE_MONITOR:
601 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100602 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200603 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100604 break;
605 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100606 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
607 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
608 continue;
Johannes Berg9607e6b2009-12-23 13:15:31 +0100609 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100610 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100611 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100612 }
Johannes Berge38bad42007-11-28 10:55:32 +0100613
Johannes Berg685fb722012-07-11 16:38:09 +0200614 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg8b2c9822012-11-06 20:23:30 +0100615 if (sdata &&
616 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
617 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200618 iterator(data, sdata->vif.addr, &sdata->vif);
619
Johannes Berge38bad42007-11-28 10:55:32 +0100620 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100621}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200622EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200623
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400624/*
625 * Nothing should have been stuffed into the workqueue during
626 * the suspend->resume cycle. If this WARN is seen then there
627 * is a bug with either the driver suspend or something in
628 * mac80211 stuffing into the workqueue which we haven't yet
629 * cleared during mac80211's suspend cycle.
630 */
631static bool ieee80211_can_queue_work(struct ieee80211_local *local)
632{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100633 if (WARN(local->suspended && !local->resuming,
634 "queueing ieee80211 work while going to suspend\n"))
635 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400636
637 return true;
638}
639
640void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
641{
642 struct ieee80211_local *local = hw_to_local(hw);
643
644 if (!ieee80211_can_queue_work(local))
645 return;
646
647 queue_work(local->workqueue, work);
648}
649EXPORT_SYMBOL(ieee80211_queue_work);
650
651void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
652 struct delayed_work *dwork,
653 unsigned long delay)
654{
655 struct ieee80211_local *local = hw_to_local(hw);
656
657 if (!ieee80211_can_queue_work(local))
658 return;
659
660 queue_delayed_work(local->workqueue, dwork, delay);
661}
662EXPORT_SYMBOL(ieee80211_queue_delayed_work);
663
Johannes Bergb2e506b2013-03-26 14:54:16 +0100664u32 ieee802_11_parse_elems_crc(u8 *start, size_t len, bool action,
Johannes Bergdd769862011-11-18 16:54:50 +0100665 struct ieee802_11_elems *elems,
666 u64 filter, u32 crc)
667{
668 size_t left = len;
669 u8 *pos = start;
670 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800671 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergb2e506b2013-03-26 14:54:16 +0100672 const u8 *ie;
Johannes Bergdd769862011-11-18 16:54:50 +0100673
Paul Stewartfcff4f12012-02-23 17:59:53 -0800674 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100675 memset(elems, 0, sizeof(*elems));
676 elems->ie_start = start;
677 elems->total_len = len;
678
679 while (left >= 2) {
680 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800681 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100682
683 id = *pos++;
684 elen = *pos++;
685 left -= 2;
686
Paul Stewartfcff4f12012-02-23 17:59:53 -0800687 if (elen > left) {
688 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100689 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800690 }
691
Johannes Berg9690fb12012-10-24 14:19:53 +0200692 switch (id) {
693 case WLAN_EID_SSID:
694 case WLAN_EID_SUPP_RATES:
695 case WLAN_EID_FH_PARAMS:
696 case WLAN_EID_DS_PARAMS:
697 case WLAN_EID_CF_PARAMS:
698 case WLAN_EID_TIM:
699 case WLAN_EID_IBSS_PARAMS:
700 case WLAN_EID_CHALLENGE:
701 case WLAN_EID_RSN:
702 case WLAN_EID_ERP_INFO:
703 case WLAN_EID_EXT_SUPP_RATES:
704 case WLAN_EID_HT_CAPABILITY:
705 case WLAN_EID_HT_OPERATION:
706 case WLAN_EID_VHT_CAPABILITY:
707 case WLAN_EID_VHT_OPERATION:
708 case WLAN_EID_MESH_ID:
709 case WLAN_EID_MESH_CONFIG:
710 case WLAN_EID_PEER_MGMT:
711 case WLAN_EID_PREQ:
712 case WLAN_EID_PREP:
713 case WLAN_EID_PERR:
714 case WLAN_EID_RANN:
715 case WLAN_EID_CHANNEL_SWITCH:
716 case WLAN_EID_EXT_CHANSWITCH_ANN:
717 case WLAN_EID_COUNTRY:
718 case WLAN_EID_PWR_CONSTRAINT:
719 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg85220d72013-03-25 18:29:27 +0100720 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100721 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
722 /*
723 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
724 * that if the content gets bigger it might be needed more than once
725 */
Johannes Berg9690fb12012-10-24 14:19:53 +0200726 if (test_bit(id, seen_elems)) {
727 elems->parse_error = true;
728 left -= elen;
729 pos += elen;
730 continue;
731 }
732 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800733 }
Johannes Bergdd769862011-11-18 16:54:50 +0100734
735 if (calc_crc && id < 64 && (filter & (1ULL << id)))
736 crc = crc32_be(crc, pos - 2, elen + 2);
737
Paul Stewartfcff4f12012-02-23 17:59:53 -0800738 elem_parse_failed = false;
739
Johannes Bergdd769862011-11-18 16:54:50 +0100740 switch (id) {
741 case WLAN_EID_SSID:
742 elems->ssid = pos;
743 elems->ssid_len = elen;
744 break;
745 case WLAN_EID_SUPP_RATES:
746 elems->supp_rates = pos;
747 elems->supp_rates_len = elen;
748 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100749 case WLAN_EID_DS_PARAMS:
Johannes Berg1cd8e882013-03-27 14:30:12 +0100750 if (elen >= 1)
751 elems->ds_params = pos;
752 else
753 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100754 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100755 case WLAN_EID_TIM:
756 if (elen >= sizeof(struct ieee80211_tim_ie)) {
757 elems->tim = (void *)pos;
758 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800759 } else
760 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100761 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100762 case WLAN_EID_CHALLENGE:
763 elems->challenge = pos;
764 elems->challenge_len = elen;
765 break;
766 case WLAN_EID_VENDOR_SPECIFIC:
767 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
768 pos[2] == 0xf2) {
769 /* Microsoft OUI (00:50:F2) */
770
771 if (calc_crc)
772 crc = crc32_be(crc, pos - 2, elen + 2);
773
Johannes Berg441a33b2013-02-12 16:27:04 +0100774 if (elen >= 5 && pos[3] == 2) {
Johannes Bergdd769862011-11-18 16:54:50 +0100775 /* OUI Type 2 - WMM IE */
776 if (pos[4] == 0) {
777 elems->wmm_info = pos;
778 elems->wmm_info_len = elen;
779 } else if (pos[4] == 1) {
780 elems->wmm_param = pos;
781 elems->wmm_param_len = elen;
782 }
783 }
784 }
785 break;
786 case WLAN_EID_RSN:
787 elems->rsn = pos;
788 elems->rsn_len = elen;
789 break;
790 case WLAN_EID_ERP_INFO:
Johannes Berg1946bed2013-03-27 14:31:53 +0100791 if (elen >= 1)
792 elems->erp_info = pos;
793 else
794 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100795 break;
796 case WLAN_EID_EXT_SUPP_RATES:
797 elems->ext_supp_rates = pos;
798 elems->ext_supp_rates_len = elen;
799 break;
800 case WLAN_EID_HT_CAPABILITY:
801 if (elen >= sizeof(struct ieee80211_ht_cap))
802 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800803 else
804 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100805 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100806 case WLAN_EID_HT_OPERATION:
807 if (elen >= sizeof(struct ieee80211_ht_operation))
808 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800809 else
810 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100811 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000812 case WLAN_EID_VHT_CAPABILITY:
813 if (elen >= sizeof(struct ieee80211_vht_cap))
814 elems->vht_cap_elem = (void *)pos;
815 else
816 elem_parse_failed = true;
817 break;
818 case WLAN_EID_VHT_OPERATION:
819 if (elen >= sizeof(struct ieee80211_vht_operation))
820 elems->vht_operation = (void *)pos;
821 else
822 elem_parse_failed = true;
823 break;
Johannes Bergbee7f582013-02-07 22:24:55 +0100824 case WLAN_EID_OPMODE_NOTIF:
825 if (elen > 0)
826 elems->opmode_notif = pos;
827 else
828 elem_parse_failed = true;
829 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100830 case WLAN_EID_MESH_ID:
831 elems->mesh_id = pos;
832 elems->mesh_id_len = elen;
833 break;
834 case WLAN_EID_MESH_CONFIG:
835 if (elen >= sizeof(struct ieee80211_meshconf_ie))
836 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800837 else
838 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100839 break;
840 case WLAN_EID_PEER_MGMT:
841 elems->peering = pos;
842 elems->peering_len = elen;
843 break;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100844 case WLAN_EID_MESH_AWAKE_WINDOW:
845 if (elen >= 2)
846 elems->awake_window = (void *)pos;
847 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100848 case WLAN_EID_PREQ:
849 elems->preq = pos;
850 elems->preq_len = elen;
851 break;
852 case WLAN_EID_PREP:
853 elems->prep = pos;
854 elems->prep_len = elen;
855 break;
856 case WLAN_EID_PERR:
857 elems->perr = pos;
858 elems->perr_len = elen;
859 break;
860 case WLAN_EID_RANN:
861 if (elen >= sizeof(struct ieee80211_rann_ie))
862 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800863 else
864 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100865 break;
866 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200867 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
868 elem_parse_failed = true;
869 break;
870 }
871 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100872 break;
Johannes Bergb4f286a12013-03-26 14:13:58 +0100873 case WLAN_EID_EXT_CHANSWITCH_ANN:
874 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
875 elem_parse_failed = true;
876 break;
877 }
878 elems->ext_chansw_ie = (void *)pos;
879 break;
Johannes Berg85220d72013-03-25 18:29:27 +0100880 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
881 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
882 elem_parse_failed = true;
883 break;
884 }
885 elems->sec_chan_offs = (void *)pos;
886 break;
Johannes Bergb2e506b2013-03-26 14:54:16 +0100887 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
888 if (!action ||
889 elen != sizeof(*elems->wide_bw_chansw_ie)) {
890 elem_parse_failed = true;
891 break;
892 }
893 elems->wide_bw_chansw_ie = (void *)pos;
894 break;
895 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
896 if (action) {
897 elem_parse_failed = true;
898 break;
899 }
900 /*
901 * This is a bit tricky, but as we only care about
902 * the wide bandwidth channel switch element, so
903 * just parse it out manually.
904 */
905 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
906 pos, elen);
907 if (ie) {
908 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
909 elems->wide_bw_chansw_ie =
910 (void *)(ie + 2);
911 else
912 elem_parse_failed = true;
913 }
914 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100915 case WLAN_EID_COUNTRY:
916 elems->country_elem = pos;
917 elems->country_elem_len = elen;
918 break;
919 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +0200920 if (elen != 1) {
921 elem_parse_failed = true;
922 break;
923 }
Johannes Bergdd769862011-11-18 16:54:50 +0100924 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100925 break;
926 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg79ba1d82013-03-27 14:38:07 +0100927 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
928 elems->timeout_int = (void *)pos;
929 else
930 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100931 break;
932 default:
933 break;
934 }
935
Paul Stewartfcff4f12012-02-23 17:59:53 -0800936 if (elem_parse_failed)
937 elems->parse_error = true;
938 else
Johannes Berg5df45692012-10-24 14:22:37 +0200939 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -0800940
Johannes Bergdd769862011-11-18 16:54:50 +0100941 left -= elen;
942 pos += elen;
943 }
944
Paul Stewartfcff4f12012-02-23 17:59:53 -0800945 if (left != 0)
946 elems->parse_error = true;
947
Johannes Bergdd769862011-11-18 16:54:50 +0100948 return crc;
949}
950
Johannes Berg3abead52012-03-02 15:56:59 +0100951void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
952 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200953{
954 struct ieee80211_local *local = sdata->local;
955 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +0200956 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +0200957 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200958 bool use_11b, enable_qos;
Johannes Bergaa837e12009-05-07 16:16:24 +0200959 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200960
961 if (!local->ops->conf_tx)
962 return;
963
Johannes Berg54bcbc62012-03-28 11:04:25 +0200964 if (local->hw.queues < IEEE80211_NUM_ACS)
965 return;
966
Johannes Berg5825fe102008-09-09 12:56:01 +0200967 memset(&qparam, 0, sizeof(qparam));
968
Johannes Berg55de9082012-07-26 17:24:39 +0200969 rcu_read_lock();
970 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
971 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +0100972 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +0200973 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +0200974 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +0200975
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200976 /*
977 * By default disable QoS in STA mode for old access points, which do
978 * not support 802.11e. New APs will provide proper queue parameters,
979 * that we will configure later.
980 */
981 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
982
Johannes Berg54bcbc62012-03-28 11:04:25 +0200983 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
Johannes Bergaa837e12009-05-07 16:16:24 +0200984 /* Set defaults according to 802.11-2007 Table 7-37 */
985 aCWmax = 1023;
986 if (use_11b)
987 aCWmin = 31;
988 else
989 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200990
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200991 if (enable_qos) {
992 switch (ac) {
993 case IEEE80211_AC_BK:
994 qparam.cw_max = aCWmax;
995 qparam.cw_min = aCWmin;
996 qparam.txop = 0;
997 qparam.aifs = 7;
998 break;
999 /* never happens but let's not leave undefined */
1000 default:
1001 case IEEE80211_AC_BE:
1002 qparam.cw_max = aCWmax;
1003 qparam.cw_min = aCWmin;
1004 qparam.txop = 0;
1005 qparam.aifs = 3;
1006 break;
1007 case IEEE80211_AC_VI:
1008 qparam.cw_max = aCWmin;
1009 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1010 if (use_11b)
1011 qparam.txop = 6016/32;
1012 else
1013 qparam.txop = 3008/32;
1014 qparam.aifs = 2;
1015 break;
1016 case IEEE80211_AC_VO:
1017 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1018 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1019 if (use_11b)
1020 qparam.txop = 3264/32;
1021 else
1022 qparam.txop = 1504/32;
1023 qparam.aifs = 2;
1024 break;
1025 }
1026 } else {
1027 /* Confiure old 802.11b/g medium access rules. */
Johannes Berg7ba10a82009-05-27 09:41:06 +02001028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +02001030 qparam.txop = 0;
Johannes Bergaa837e12009-05-07 16:16:24 +02001031 qparam.aifs = 2;
Johannes Bergaa837e12009-05-07 16:16:24 +02001032 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001033
Kalle Valoab133152010-01-12 10:42:31 +02001034 qparam.uapsd = false;
1035
Johannes Berg54bcbc62012-03-28 11:04:25 +02001036 sdata->tx_conf[ac] = qparam;
1037 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +02001038 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001039
Johannes Bergf142c6b2012-06-18 20:07:15 +02001040 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1041 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001042 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +01001043 if (bss_notify)
1044 ieee80211_bss_info_change_notify(sdata,
1045 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +05301046 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001047}
Johannes Berge50db652008-09-09 15:07:09 +02001048
Johannes Berg46900292009-02-15 12:44:28 +01001049void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
1050 const size_t supp_rates_len,
1051 const u8 *supp_rates)
1052{
Johannes Berg55de9082012-07-26 17:24:39 +02001053 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg46900292009-02-15 12:44:28 +01001054 int i, have_higher_than_11mbit = 0;
1055
1056 /* cf. IEEE 802.11 9.2.12 */
1057 for (i = 0; i < supp_rates_len; i++)
1058 if ((supp_rates[i] & 0x7f) * 5 > 110)
1059 have_higher_than_11mbit = 1;
1060
Johannes Berg55de9082012-07-26 17:24:39 +02001061 rcu_read_lock();
1062 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1063
1064 if (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001065 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
Johannes Berg46900292009-02-15 12:44:28 +01001066 have_higher_than_11mbit)
1067 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
1068 else
1069 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Johannes Berg55de9082012-07-26 17:24:39 +02001070 rcu_read_unlock();
Johannes Berg46900292009-02-15 12:44:28 +01001071
Johannes Berg3abead52012-03-02 15:56:59 +01001072 ieee80211_set_wmm_default(sdata, true);
Johannes Berg46900292009-02-15 12:44:28 +01001073}
1074
Johannes Berg46900292009-02-15 12:44:28 +01001075void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001076 u16 transaction, u16 auth_alg, u16 status,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001077 const u8 *extra, size_t extra_len, const u8 *da,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001078 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1079 u32 tx_flags)
Johannes Berg46900292009-02-15 12:44:28 +01001080{
1081 struct ieee80211_local *local = sdata->local;
1082 struct sk_buff *skb;
1083 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001084 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001085
1086 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +02001087 sizeof(*mgmt) + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -07001088 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001089 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001090
Johannes Berg46900292009-02-15 12:44:28 +01001091 skb_reserve(skb, local->hw.extra_tx_headroom);
1092
1093 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1094 memset(mgmt, 0, 24 + 6);
1095 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1096 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001097 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001098 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001099 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1100 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1101 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001102 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001103 if (extra)
1104 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001105
Johannes Bergfffd0932009-07-08 14:22:54 +02001106 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1107 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1108 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1109 WARN_ON(err);
1110 }
1111
Johannes Berg1672c0e32013-01-29 15:02:27 +01001112 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1113 tx_flags;
Johannes Berg62ae67b2009-11-18 18:42:05 +01001114 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001115}
1116
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001117void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1118 const u8 *bssid, u16 stype, u16 reason,
1119 bool send_frame, u8 *frame_buf)
1120{
1121 struct ieee80211_local *local = sdata->local;
1122 struct sk_buff *skb;
1123 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1124
1125 /* build frame */
1126 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1127 mgmt->duration = 0; /* initialize only */
1128 mgmt->seq_ctrl = 0; /* initialize only */
1129 memcpy(mgmt->da, bssid, ETH_ALEN);
1130 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1131 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1132 /* u.deauth.reason_code == u.disassoc.reason_code */
1133 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1134
1135 if (send_frame) {
1136 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1137 IEEE80211_DEAUTH_FRAME_LEN);
1138 if (!skb)
1139 return;
1140
1141 skb_reserve(skb, local->hw.extra_tx_headroom);
1142
1143 /* copy in frame */
1144 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1145 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1146
1147 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1148 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1149 IEEE80211_SKB_CB(skb)->flags |=
1150 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1151
1152 ieee80211_tx_skb(sdata, skb);
1153 }
1154}
1155
Johannes Bergde95a542009-04-01 11:58:36 +02001156int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Bergc604b9f2012-11-29 12:45:18 +01001157 size_t buffer_len, const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +03001158 enum ieee80211_band band, u32 rate_mask,
1159 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +02001160{
1161 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001162 u8 *pos = buffer, *end = buffer + buffer_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001163 size_t offset = 0, noffset;
1164 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001165 u8 rates[32];
1166 int num_rates;
1167 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001168
Johannes Berg4d36ec582009-10-27 20:59:55 +01001169 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001170 if (WARN_ON_ONCE(!sband))
1171 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001172
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001173 num_rates = 0;
1174 for (i = 0; i < sband->n_bitrates; i++) {
1175 if ((BIT(i) & rate_mask) == 0)
1176 continue; /* skip rate */
1177 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1178 }
1179
1180 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001181
Johannes Bergc604b9f2012-11-29 12:45:18 +01001182 if (end - pos < 2 + supp_rates_len)
1183 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001184 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001185 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001186 memcpy(pos, rates, supp_rates_len);
1187 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001188
Johannes Berg8e664fb2009-12-23 13:15:38 +01001189 /* insert "request information" if in custom IEs */
1190 if (ie && ie_len) {
1191 static const u8 before_extrates[] = {
1192 WLAN_EID_SSID,
1193 WLAN_EID_SUPP_RATES,
1194 WLAN_EID_REQUEST,
1195 };
1196 noffset = ieee80211_ie_split(ie, ie_len,
1197 before_extrates,
1198 ARRAY_SIZE(before_extrates),
1199 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001200 if (end - pos < noffset - offset)
1201 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001202 memcpy(pos, ie + offset, noffset - offset);
1203 pos += noffset - offset;
1204 offset = noffset;
1205 }
Johannes Bergde95a542009-04-01 11:58:36 +02001206
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001207 ext_rates_len = num_rates - supp_rates_len;
1208 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001209 if (end - pos < 2 + ext_rates_len)
1210 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001211 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001212 *pos++ = ext_rates_len;
1213 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1214 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001215 }
1216
Jouni Malinen651b5222010-08-28 19:37:51 +03001217 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001218 if (end - pos < 3)
1219 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001220 *pos++ = WLAN_EID_DS_PARAMS;
1221 *pos++ = 1;
1222 *pos++ = channel;
1223 }
1224
Johannes Berg8e664fb2009-12-23 13:15:38 +01001225 /* insert custom IEs that go before HT */
1226 if (ie && ie_len) {
1227 static const u8 before_ht[] = {
1228 WLAN_EID_SSID,
1229 WLAN_EID_SUPP_RATES,
1230 WLAN_EID_REQUEST,
1231 WLAN_EID_EXT_SUPP_RATES,
1232 WLAN_EID_DS_PARAMS,
1233 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1234 };
1235 noffset = ieee80211_ie_split(ie, ie_len,
1236 before_ht, ARRAY_SIZE(before_ht),
1237 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001238 if (end - pos < noffset - offset)
1239 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001240 memcpy(pos, ie + offset, noffset - offset);
1241 pos += noffset - offset;
1242 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001243 }
1244
Johannes Bergc604b9f2012-11-29 12:45:18 +01001245 if (sband->ht_cap.ht_supported) {
1246 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1247 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001248 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1249 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001250 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001251
Johannes Bergde95a542009-04-01 11:58:36 +02001252 /*
1253 * If adding more here, adjust code in main.c
1254 * that calculates local->scan_ies_len.
1255 */
1256
Johannes Berg8e664fb2009-12-23 13:15:38 +01001257 /* add any remaining custom IEs */
1258 if (ie && ie_len) {
1259 noffset = ie_len;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001260 if (end - pos < noffset - offset)
1261 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001262 memcpy(pos, ie + offset, noffset - offset);
1263 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001264 }
1265
Johannes Bergc604b9f2012-11-29 12:45:18 +01001266 if (sband->vht_cap.vht_supported) {
1267 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1268 goto out_err;
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001269 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1270 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001271 }
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001272
Johannes Bergde95a542009-04-01 11:58:36 +02001273 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001274 out_err:
1275 WARN_ONCE(1, "not enough space for preq IEs\n");
1276 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001277}
1278
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001279struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001280 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001281 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001282 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001283 const u8 *ie, size_t ie_len,
1284 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001285{
1286 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001287 struct sk_buff *skb;
1288 struct ieee80211_mgmt *mgmt;
Johannes Berg6b778632012-07-23 14:53:27 +02001289 u8 chan_no;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001290 int ies_len;
Johannes Berg46900292009-02-15 12:44:28 +01001291
Paul Stewarta806c552011-06-23 09:00:11 -08001292 /*
1293 * Do not send DS Channel parameter for directed probe requests
1294 * in order to maximize the chance that we get a response. Some
1295 * badly-behaved APs don't respond when this parameter is included.
1296 */
1297 if (directed)
Johannes Berg6b778632012-07-23 14:53:27 +02001298 chan_no = 0;
Paul Stewarta806c552011-06-23 09:00:11 -08001299 else
Johannes Berg6b778632012-07-23 14:53:27 +02001300 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001301
Kalle Valo7c12ce82010-01-05 20:16:44 +02001302 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001303 ssid, ssid_len, 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001304 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001305 return NULL;
1306
1307 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1308 skb_tailroom(skb),
Johannes Bergc604b9f2012-11-29 12:45:18 +01001309 ie, ie_len, chan->band,
Johannes Berg62ae67b2009-11-18 18:42:05 +01001310 ratemask, chan_no);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001311 skb_put(skb, ies_len);
Johannes Berg46900292009-02-15 12:44:28 +01001312
1313 if (dst) {
1314 mgmt = (struct ieee80211_mgmt *) skb->data;
1315 memcpy(mgmt->da, dst, ETH_ALEN);
1316 memcpy(mgmt->bssid, dst, ETH_ALEN);
1317 }
1318
1319 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001320
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001321 return skb;
1322}
1323
1324void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1325 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001326 const u8 *ie, size_t ie_len,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001327 u32 ratemask, bool directed, u32 tx_flags,
Johannes Berg55de9082012-07-26 17:24:39 +02001328 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001329{
1330 struct sk_buff *skb;
1331
Johannes Bergfe94fe02012-07-30 12:26:34 +02001332 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001333 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001334 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301335 if (skb) {
Johannes Berg1672c0e32013-01-29 15:02:27 +01001336 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
Johannes Berg55de9082012-07-26 17:24:39 +02001337 if (scan)
1338 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1339 else
1340 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301341 }
Johannes Berg46900292009-02-15 12:44:28 +01001342}
1343
1344u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1345 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001346 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001347{
1348 struct ieee80211_supported_band *sband;
1349 struct ieee80211_rate *bitrates;
1350 size_t num_rates;
1351 u32 supp_rates;
1352 int i, j;
1353 sband = local->hw.wiphy->bands[band];
1354
Michal Kazior4ee73f32012-04-11 08:47:56 +02001355 if (WARN_ON(!sband))
1356 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001357
1358 bitrates = sband->bitrates;
1359 num_rates = sband->n_bitrates;
1360 supp_rates = 0;
1361 for (i = 0; i < elems->supp_rates_len +
1362 elems->ext_supp_rates_len; i++) {
1363 u8 rate = 0;
1364 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001365 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001366 if (i < elems->supp_rates_len)
1367 rate = elems->supp_rates[i];
1368 else if (elems->ext_supp_rates)
1369 rate = elems->ext_supp_rates
1370 [i - elems->supp_rates_len];
1371 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001372 is_basic = !!(rate & 0x80);
1373
1374 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1375 continue;
1376
1377 for (j = 0; j < num_rates; j++) {
1378 if (bitrates[j].bitrate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001379 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001380 if (basic_rates && is_basic)
1381 *basic_rates |= BIT(j);
1382 }
1383 }
Johannes Berg46900292009-02-15 12:44:28 +01001384 }
1385 return supp_rates;
1386}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001387
Johannes Berg84f6a012009-08-20 20:02:20 +02001388void ieee80211_stop_device(struct ieee80211_local *local)
1389{
1390 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001391 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001392
1393 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001394
1395 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001396 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001397}
1398
Stanislaw Gruszka153a5fc2013-02-28 10:55:30 +01001399static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1400 struct ieee80211_sub_if_data *sdata)
1401{
1402 struct ieee80211_chanctx_conf *conf;
1403 struct ieee80211_chanctx *ctx;
1404
1405 if (!local->use_chanctx)
1406 return;
1407
1408 mutex_lock(&local->chanctx_mtx);
1409 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1410 lockdep_is_held(&local->chanctx_mtx));
1411 if (conf) {
1412 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1413 drv_assign_vif_chanctx(local, sdata, ctx);
1414 }
1415 mutex_unlock(&local->chanctx_mtx);
1416}
1417
Johannes Bergf2753dd2009-04-14 10:09:24 +02001418int ieee80211_reconfig(struct ieee80211_local *local)
1419{
1420 struct ieee80211_hw *hw = &local->hw;
1421 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001422 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001423 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001424 int res, i;
Johannes Bergd8881302013-01-10 23:55:33 +01001425 bool reconfig_due_to_wowlan = false;
1426
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001427#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001428 if (local->suspended)
1429 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001430
Johannes Bergeecc4802011-05-04 15:37:29 +02001431 if (local->wowlan) {
1432 local->wowlan = false;
1433 res = drv_resume(local);
1434 if (res < 0) {
1435 local->resuming = false;
1436 return res;
1437 }
1438 if (res == 0)
1439 goto wake_up;
1440 WARN_ON(res > 1);
1441 /*
1442 * res is 1, which means the driver requested
1443 * to go through a regular reset on wakeup.
1444 */
Johannes Bergd8881302013-01-10 23:55:33 +01001445 reconfig_due_to_wowlan = true;
Johannes Bergeecc4802011-05-04 15:37:29 +02001446 }
1447#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001448 /* everything else happens only if HW was up & running */
1449 if (!local->open_count)
1450 goto wake_up;
1451
1452 /*
1453 * Upon resume hardware can sometimes be goofy due to
1454 * various platform / driver / bus issues, so restarting
1455 * the device may at times not work immediately. Propagate
1456 * the error.
1457 */
1458 res = drv_start(local);
1459 if (res) {
1460 WARN(local->suspended, "Hardware became unavailable "
1461 "upon resume. This could be a software issue "
1462 "prior to suspend or a hardware issue.\n");
1463 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001464 }
1465
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301466 /* setup fragmentation threshold */
1467 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1468
1469 /* setup RTS threshold */
1470 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1471
1472 /* reset coverage class */
1473 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1474
Johannes Berg94f9b972011-07-14 16:48:54 +02001475 ieee80211_led_radio(local, true);
1476 ieee80211_mod_tpt_led_trig(local,
1477 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1478
Johannes Bergf2753dd2009-04-14 10:09:24 +02001479 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001480 sdata = rtnl_dereference(local->monitor_sdata);
1481 if (sdata) {
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001482 /* in HW restart it exists already */
1483 WARN_ON(local->resuming);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001484 res = drv_add_interface(local, sdata);
1485 if (WARN_ON(res)) {
1486 rcu_assign_pointer(local->monitor_sdata, NULL);
1487 synchronize_net();
1488 kfree(sdata);
1489 }
1490 }
1491
Johannes Bergf2753dd2009-04-14 10:09:24 +02001492 list_for_each_entry(sdata, &local->interfaces, list) {
1493 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1494 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001495 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001496 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001497 }
1498
Johannes Berg55de9082012-07-26 17:24:39 +02001499 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001500 if (local->use_chanctx) {
1501 mutex_lock(&local->chanctx_mtx);
1502 list_for_each_entry(ctx, &local->chanctx_list, list)
1503 WARN_ON(drv_add_chanctx(local, ctx));
1504 mutex_unlock(&local->chanctx_mtx);
1505 }
Johannes Berg55de9082012-07-26 17:24:39 +02001506
Johannes Berg6352c872012-11-07 12:40:41 +01001507 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg6352c872012-11-07 12:40:41 +01001508 if (!ieee80211_sdata_running(sdata))
1509 continue;
Stanislaw Gruszka153a5fc2013-02-28 10:55:30 +01001510 ieee80211_assign_chanctx(local, sdata);
Johannes Berg6352c872012-11-07 12:40:41 +01001511 }
1512
Johannes Bergfe5f2552012-11-19 22:19:08 +01001513 sdata = rtnl_dereference(local->monitor_sdata);
Stanislaw Gruszka153a5fc2013-02-28 10:55:30 +01001514 if (sdata && ieee80211_sdata_running(sdata))
1515 ieee80211_assign_chanctx(local, sdata);
Johannes Bergfe5f2552012-11-19 22:19:08 +01001516
Johannes Bergf2753dd2009-04-14 10:09:24 +02001517 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001518 mutex_lock(&local->sta_mtx);
1519 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001520 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001521
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001522 if (!sta->uploaded)
1523 continue;
1524
1525 /* AP-mode stations will be added later */
1526 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1527 continue;
1528
1529 for (state = IEEE80211_STA_NOTEXIST;
1530 state < sta->sta_state; state++)
1531 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1532 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001533 }
Johannes Berg34e89502010-02-03 13:59:58 +01001534 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001535
Eliad Peller2683d652011-07-14 20:29:42 +03001536 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001537 if (hw->queues >= IEEE80211_NUM_ACS) {
1538 list_for_each_entry(sdata, &local->interfaces, list) {
1539 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1540 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1541 !ieee80211_sdata_running(sdata))
1542 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001543
Johannes Berg54bcbc62012-03-28 11:04:25 +02001544 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1545 drv_conf_tx(local, sdata, i,
1546 &sdata->tx_conf[i]);
1547 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001548 }
Eliad Peller2683d652011-07-14 20:29:42 +03001549
Johannes Bergf2753dd2009-04-14 10:09:24 +02001550 /* reconfigure hardware */
1551 ieee80211_hw_config(local, ~0);
1552
Johannes Bergf2753dd2009-04-14 10:09:24 +02001553 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001554
1555 /* Finally also reconfigure all the BSS information */
1556 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001557 u32 changed;
1558
Johannes Berg9607e6b2009-12-23 13:15:31 +01001559 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001560 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001561
1562 /* common change flags for all interface types */
1563 changed = BSS_CHANGED_ERP_CTS_PROT |
1564 BSS_CHANGED_ERP_PREAMBLE |
1565 BSS_CHANGED_ERP_SLOT |
1566 BSS_CHANGED_HT |
1567 BSS_CHANGED_BASIC_RATES |
1568 BSS_CHANGED_BEACON_INT |
1569 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001570 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001571 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001572 BSS_CHANGED_IDLE |
1573 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001574
Johannes Bergf2753dd2009-04-14 10:09:24 +02001575 switch (sdata->vif.type) {
1576 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001577 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001578 BSS_CHANGED_ARP_FILTER |
1579 BSS_CHANGED_PS;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001580
1581 if (sdata->u.mgd.dtim_period)
1582 changed |= BSS_CHANGED_DTIM_PERIOD;
1583
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001584 sdata_lock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001585 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001586 sdata_unlock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001587 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001588 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001589 changed |= BSS_CHANGED_IBSS;
1590 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001591 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001592 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001593
Johannes Berg10416382012-10-19 15:44:42 +02001594 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001595 changed |= BSS_CHANGED_AP_PROBE_RESP;
1596
Johannes Berg10416382012-10-19 15:44:42 +02001597 if (rcu_access_pointer(sdata->u.ap.beacon))
1598 drv_start_ap(local, sdata);
1599 }
1600
Arik Nemtsov78274932011-09-04 11:11:32 +03001601 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001602 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg8da34932012-12-14 14:17:26 +01001603 if (sdata->vif.bss_conf.enable_beacon) {
1604 changed |= BSS_CHANGED_BEACON |
1605 BSS_CHANGED_BEACON_ENABLED;
1606 ieee80211_bss_info_change_notify(sdata, changed);
1607 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001608 break;
1609 case NL80211_IFTYPE_WDS:
1610 break;
1611 case NL80211_IFTYPE_AP_VLAN:
1612 case NL80211_IFTYPE_MONITOR:
1613 /* ignore virtual */
1614 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001615 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf142c6b2012-06-18 20:07:15 +02001616 changed = BSS_CHANGED_IDLE;
1617 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001618 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001619 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001620 case NL80211_IFTYPE_P2P_CLIENT:
1621 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001622 WARN_ON(1);
1623 break;
1624 }
1625 }
1626
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001627 ieee80211_recalc_ps(local, -1);
1628
Johannes Berg2a419052010-06-10 10:21:29 +02001629 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001630 * The sta might be in psm against the ap (e.g. because
1631 * this was the state before a hw restart), so we
1632 * explicitly send a null packet in order to make sure
1633 * it'll sync against the ap (and get out of psm).
1634 */
1635 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1636 list_for_each_entry(sdata, &local->interfaces, list) {
1637 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1638 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001639 if (!sdata->u.mgd.associated)
1640 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001641
1642 ieee80211_send_nullfunc(local, sdata, 0);
1643 }
1644 }
1645
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001646 /* APs are now beaconing, add back stations */
1647 mutex_lock(&local->sta_mtx);
1648 list_for_each_entry(sta, &local->sta_list, list) {
1649 enum ieee80211_sta_state state;
1650
1651 if (!sta->uploaded)
1652 continue;
1653
1654 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1655 continue;
1656
1657 for (state = IEEE80211_STA_NOTEXIST;
1658 state < sta->sta_state; state++)
1659 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1660 state + 1));
1661 }
1662 mutex_unlock(&local->sta_mtx);
1663
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001664 /* add back keys */
1665 list_for_each_entry(sdata, &local->interfaces, list)
1666 if (ieee80211_sdata_running(sdata))
1667 ieee80211_enable_keys(sdata);
1668
Eliad Pellerc6209482012-07-02 15:08:25 +03001669 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001670 local->in_reconfig = false;
1671 barrier();
1672
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001673 if (local->monitors == local->open_count && local->monitors > 0)
1674 ieee80211_add_virtual_monitor(local);
1675
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001676 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001677 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1678 * sessions can be established after a resume.
1679 *
1680 * Also tear down aggregation sessions since reconfiguring
1681 * them in a hardware restart scenario is not easily done
1682 * right now, and the hardware will have lost information
1683 * about the sessions, but we and the AP still think they
1684 * are active. This is really a workaround though.
1685 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001686 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001687 mutex_lock(&local->sta_mtx);
1688
1689 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc82c4a82012-07-18 13:31:31 +02001690 ieee80211_sta_tear_down_BA_sessions(
1691 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001692 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001693 }
Johannes Berg2a419052010-06-10 10:21:29 +02001694
1695 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001696 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001697
Johannes Berg445ea4e2013-02-13 12:25:28 +01001698 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1699 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001700
Johannes Berg5bb644a2009-05-17 11:40:42 +02001701 /*
1702 * If this is for hw restart things are still running.
1703 * We may want to change that later, however.
1704 */
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001705 if (!local->suspended || reconfig_due_to_wowlan)
Johannes Berg9214ad72012-11-06 19:18:13 +01001706 drv_restart_complete(local);
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001707
1708 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001709 return 0;
1710
1711#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001712 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001713 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001714 mb();
1715 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001716
Johannes Bergb8360ab2013-04-29 14:57:44 +02001717 list_for_each_entry(sdata, &local->interfaces, list) {
1718 if (!ieee80211_sdata_running(sdata))
1719 continue;
1720 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1721 ieee80211_sta_restart(sdata);
1722 }
1723
Johannes Berg26d59532011-04-01 13:52:48 +02001724 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001725#else
1726 WARN_ON(1);
1727#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001728 return 0;
1729}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001730
Johannes Berg95acac62011-07-12 12:30:59 +02001731void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1732{
1733 struct ieee80211_sub_if_data *sdata;
1734 struct ieee80211_local *local;
1735 struct ieee80211_key *key;
1736
1737 if (WARN_ON(!vif))
1738 return;
1739
1740 sdata = vif_to_sdata(vif);
1741 local = sdata->local;
1742
1743 if (WARN_ON(!local->resuming))
1744 return;
1745
1746 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1747 return;
1748
1749 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1750
1751 mutex_lock(&local->key_mtx);
1752 list_for_each_entry(key, &sdata->key_list, list)
1753 key->flags |= KEY_FLAG_TAINTED;
1754 mutex_unlock(&local->key_mtx);
1755}
1756EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1757
Johannes Berg04ecd252012-09-11 14:34:12 +02001758void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01001759{
Johannes Berg04ecd252012-09-11 14:34:12 +02001760 struct ieee80211_local *local = sdata->local;
1761 struct ieee80211_chanctx_conf *chanctx_conf;
1762 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01001763
Johannes Berg04ecd252012-09-11 14:34:12 +02001764 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001765
Johannes Berg04ecd252012-09-11 14:34:12 +02001766 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1767 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01001768
Johannes Berg04ecd252012-09-11 14:34:12 +02001769 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02001770 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01001771
Johannes Berg04ecd252012-09-11 14:34:12 +02001772 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1773 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02001774 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02001775 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001776}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001777
1778static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1779{
1780 int i;
1781
1782 for (i = 0; i < n_ids; i++)
1783 if (ids[i] == id)
1784 return true;
1785 return false;
1786}
1787
1788/**
1789 * ieee80211_ie_split - split an IE buffer according to ordering
1790 *
1791 * @ies: the IE buffer
1792 * @ielen: the length of the IE buffer
1793 * @ids: an array with element IDs that are allowed before
1794 * the split
1795 * @n_ids: the size of the element ID array
1796 * @offset: offset where to start splitting in the buffer
1797 *
1798 * This function splits an IE buffer by updating the @offset
1799 * variable to point to the location where the buffer should be
1800 * split.
1801 *
1802 * It assumes that the given IE buffer is well-formed, this
1803 * has to be guaranteed by the caller!
1804 *
1805 * It also assumes that the IEs in the buffer are ordered
1806 * correctly, if not the result of using this function will not
1807 * be ordered correctly either, i.e. it does no reordering.
1808 *
1809 * The function returns the offset where the next part of the
1810 * buffer starts, which may be @ielen if the entire (remainder)
1811 * of the buffer should be used.
1812 */
1813size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1814 const u8 *ids, int n_ids, size_t offset)
1815{
1816 size_t pos = offset;
1817
1818 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1819 pos += 2 + ies[pos + 1];
1820
1821 return pos;
1822}
1823
1824size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1825{
1826 size_t pos = offset;
1827
1828 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1829 pos += 2 + ies[pos + 1];
1830
1831 return pos;
1832}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001833
1834static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1835 int rssi_min_thold,
1836 int rssi_max_thold)
1837{
1838 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1839
1840 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1841 return;
1842
1843 /*
1844 * Scale up threshold values before storing it, as the RSSI averaging
1845 * algorithm uses a scaled up value as well. Change this scaling
1846 * factor if the RSSI averaging algorithm changes.
1847 */
1848 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1849 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1850}
1851
1852void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1853 int rssi_min_thold,
1854 int rssi_max_thold)
1855{
1856 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1857
1858 WARN_ON(rssi_min_thold == rssi_max_thold ||
1859 rssi_min_thold > rssi_max_thold);
1860
1861 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1862 rssi_max_thold);
1863}
1864EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1865
1866void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1867{
1868 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1869
1870 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1871}
1872EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03001873
Ben Greearef96a8422011-11-18 11:32:00 -08001874u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001875 u16 cap)
1876{
1877 __le16 tmp;
1878
1879 *pos++ = WLAN_EID_HT_CAPABILITY;
1880 *pos++ = sizeof(struct ieee80211_ht_cap);
1881 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1882
1883 /* capability flags */
1884 tmp = cpu_to_le16(cap);
1885 memcpy(pos, &tmp, sizeof(u16));
1886 pos += sizeof(u16);
1887
1888 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001889 *pos++ = ht_cap->ampdu_factor |
1890 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07001891 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1892
1893 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08001894 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1895 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001896
1897 /* extended capabilities */
1898 pos += sizeof(__le16);
1899
1900 /* BF capabilities */
1901 pos += sizeof(__le32);
1902
1903 /* antenna selection */
1904 pos += sizeof(u8);
1905
1906 return pos;
1907}
1908
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001909u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
Johannes Bergcc3983d2012-12-07 12:45:06 +01001910 u32 cap)
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001911{
1912 __le32 tmp;
1913
1914 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00001915 *pos++ = sizeof(struct ieee80211_vht_cap);
1916 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001917
1918 /* capability flags */
1919 tmp = cpu_to_le32(cap);
1920 memcpy(pos, &tmp, sizeof(u32));
1921 pos += sizeof(u32);
1922
1923 /* VHT MCS set */
1924 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1925 pos += sizeof(vht_cap->vht_mcs);
1926
1927 return pos;
1928}
1929
Johannes Berg074d46d2012-03-15 19:45:16 +01001930u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01001931 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001932 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001933{
Johannes Berg074d46d2012-03-15 19:45:16 +01001934 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001935 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01001936 *pos++ = WLAN_EID_HT_OPERATION;
1937 *pos++ = sizeof(struct ieee80211_ht_operation);
1938 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01001939 ht_oper->primary_chan = ieee80211_frequency_to_channel(
1940 chandef->chan->center_freq);
1941 switch (chandef->width) {
1942 case NL80211_CHAN_WIDTH_160:
1943 case NL80211_CHAN_WIDTH_80P80:
1944 case NL80211_CHAN_WIDTH_80:
1945 case NL80211_CHAN_WIDTH_40:
1946 if (chandef->center_freq1 > chandef->chan->center_freq)
1947 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1948 else
1949 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001950 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001951 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01001952 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001953 break;
1954 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07001955 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001956 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
1957 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01001958 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01001959
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001960 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01001961 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001962
1963 /* It seems that Basic MCS set and Supported MCS set
1964 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01001965 memset(&ht_oper->basic_set, 0, 16);
1966 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001967
Johannes Berg074d46d2012-03-15 19:45:16 +01001968 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001969}
1970
Johannes Berg4bf88532012-11-09 11:39:59 +01001971void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001972 const struct ieee80211_ht_operation *ht_oper,
Johannes Berg4bf88532012-11-09 11:39:59 +01001973 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001974{
1975 enum nl80211_channel_type channel_type;
1976
Johannes Berg4bf88532012-11-09 11:39:59 +01001977 if (!ht_oper) {
1978 cfg80211_chandef_create(chandef, control_chan,
1979 NL80211_CHAN_NO_HT);
1980 return;
1981 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07001982
Johannes Berg074d46d2012-03-15 19:45:16 +01001983 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07001984 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1985 channel_type = NL80211_CHAN_HT20;
1986 break;
1987 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1988 channel_type = NL80211_CHAN_HT40PLUS;
1989 break;
1990 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1991 channel_type = NL80211_CHAN_HT40MINUS;
1992 break;
1993 default:
1994 channel_type = NL80211_CHAN_NO_HT;
1995 }
1996
Johannes Berg4bf88532012-11-09 11:39:59 +01001997 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001998}
1999
Johannes Bergfc8a7322012-06-28 10:33:25 +02002000int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002001 struct sk_buff *skb, bool need_basic,
2002 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002003{
Arik Nemtsov768db342011-09-28 14:12:51 +03002004 struct ieee80211_local *local = sdata->local;
2005 struct ieee80211_supported_band *sband;
2006 int rate;
2007 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002008 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03002009
Johannes Berg6b778632012-07-23 14:53:27 +02002010 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03002011 rates = sband->n_bitrates;
2012 if (rates > 8)
2013 rates = 8;
2014
2015 if (skb_tailroom(skb) < rates + 2)
2016 return -ENOMEM;
2017
2018 pos = skb_put(skb, rates + 2);
2019 *pos++ = WLAN_EID_SUPP_RATES;
2020 *pos++ = rates;
2021 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002022 u8 basic = 0;
2023 if (need_basic && basic_rates & BIT(i))
2024 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03002025 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002026 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03002027 }
2028
2029 return 0;
2030}
2031
Johannes Bergfc8a7322012-06-28 10:33:25 +02002032int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002033 struct sk_buff *skb, bool need_basic,
2034 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002035{
Arik Nemtsov768db342011-09-28 14:12:51 +03002036 struct ieee80211_local *local = sdata->local;
2037 struct ieee80211_supported_band *sband;
2038 int rate;
2039 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002040 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03002041
Johannes Berg6b778632012-07-23 14:53:27 +02002042 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03002043 exrates = sband->n_bitrates;
2044 if (exrates > 8)
2045 exrates -= 8;
2046 else
2047 exrates = 0;
2048
2049 if (skb_tailroom(skb) < exrates + 2)
2050 return -ENOMEM;
2051
2052 if (exrates) {
2053 pos = skb_put(skb, exrates + 2);
2054 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2055 *pos++ = exrates;
2056 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002057 u8 basic = 0;
2058 if (need_basic && basic_rates & BIT(i))
2059 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03002060 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002061 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03002062 }
2063 }
2064 return 0;
2065}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002066
2067int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2068{
2069 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2070 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2071
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002072 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2073 /* non-managed type inferfaces */
2074 return 0;
2075 }
Emmanuel Grumbach3a7bba62013-03-20 17:05:45 +02002076 return ifmgd->ave_beacon_signal / 16;
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002077}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002078EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002079
2080u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2081{
2082 if (!mcs)
2083 return 1;
2084
2085 /* TODO: consider rx_highest */
2086
2087 if (mcs->rx_mask[3])
2088 return 4;
2089 if (mcs->rx_mask[2])
2090 return 3;
2091 if (mcs->rx_mask[1])
2092 return 2;
2093 return 1;
2094}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002095
2096/**
2097 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2098 * @local: mac80211 hw info struct
2099 * @status: RX status
2100 * @mpdu_len: total MPDU length (including FCS)
2101 * @mpdu_offset: offset into MPDU to calculate timestamp at
2102 *
2103 * This function calculates the RX timestamp at the given MPDU offset, taking
2104 * into account what the RX timestamp was. An offset of 0 will just normalize
2105 * the timestamp to TSF at beginning of MPDU reception.
2106 */
2107u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2108 struct ieee80211_rx_status *status,
2109 unsigned int mpdu_len,
2110 unsigned int mpdu_offset)
2111{
2112 u64 ts = status->mactime;
2113 struct rate_info ri;
2114 u16 rate;
2115
2116 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2117 return 0;
2118
2119 memset(&ri, 0, sizeof(ri));
2120
2121 /* Fill cfg80211 rate info */
2122 if (status->flag & RX_FLAG_HT) {
2123 ri.mcs = status->rate_idx;
2124 ri.flags |= RATE_INFO_FLAGS_MCS;
2125 if (status->flag & RX_FLAG_40MHZ)
2126 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2127 if (status->flag & RX_FLAG_SHORT_GI)
2128 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002129 } else if (status->flag & RX_FLAG_VHT) {
2130 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2131 ri.mcs = status->rate_idx;
2132 ri.nss = status->vht_nss;
2133 if (status->flag & RX_FLAG_40MHZ)
2134 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2135 if (status->flag & RX_FLAG_80MHZ)
2136 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2137 if (status->flag & RX_FLAG_80P80MHZ)
2138 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2139 if (status->flag & RX_FLAG_160MHZ)
2140 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2141 if (status->flag & RX_FLAG_SHORT_GI)
2142 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002143 } else {
2144 struct ieee80211_supported_band *sband;
2145
2146 sband = local->hw.wiphy->bands[status->band];
2147 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
2148 }
2149
2150 rate = cfg80211_calculate_bitrate(&ri);
2151
2152 /* rewind from end of MPDU */
2153 if (status->flag & RX_FLAG_MACTIME_END)
2154 ts -= mpdu_len * 8 * 10 / rate;
2155
2156 ts += mpdu_offset * 8 * 10 / rate;
2157
2158 return ts;
2159}
Simon Wunderlich164eb022013-02-08 18:16:20 +01002160
2161void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2162{
2163 struct ieee80211_sub_if_data *sdata;
2164
2165 mutex_lock(&local->iflist_mtx);
2166 list_for_each_entry(sdata, &local->interfaces, list) {
2167 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
2168
2169 if (sdata->wdev.cac_started) {
2170 ieee80211_vif_release_channel(sdata);
2171 cfg80211_cac_event(sdata->dev,
2172 NL80211_RADAR_CAC_ABORTED,
2173 GFP_KERNEL);
2174 }
2175 }
2176 mutex_unlock(&local->iflist_mtx);
2177}
2178
2179void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2180{
2181 struct ieee80211_local *local =
2182 container_of(work, struct ieee80211_local, radar_detected_work);
2183 struct cfg80211_chan_def chandef;
2184
2185 ieee80211_dfs_cac_cancel(local);
2186
2187 if (local->use_chanctx)
2188 /* currently not handled */
2189 WARN_ON(1);
2190 else {
Karl Beldan675a0b02013-03-25 16:26:57 +01002191 chandef = local->hw.conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002192 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2193 }
2194}
2195
2196void ieee80211_radar_detected(struct ieee80211_hw *hw)
2197{
2198 struct ieee80211_local *local = hw_to_local(hw);
2199
2200 trace_api_radar_detected(local);
2201
2202 ieee80211_queue_work(hw, &local->radar_detected_work);
2203}
2204EXPORT_SYMBOL(ieee80211_radar_detected);