blob: 6d29e40538ad7886cef285379da08a1458c69411 [file] [log] [blame]
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 */
Johannes Berg8a47cea2014-01-20 23:55:44 +010037const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
Johannes Bergc2d15602007-07-27 15:43:23 +020038
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)) {
Weilong Chenf359d3f2013-12-18 15:44:16 +080079 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,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200110 int rate, int erp, int short_preamble,
111 int shift)
Johannes Bergc2d15602007-07-27 15:43:23 +0200112{
113 int dur;
114
115 /* calculate duration (in microseconds, rounded up to next higher
116 * integer if it includes a fractional microsecond) to send frame of
117 * len bytes (does not include FCS) at the given rate. Duration will
118 * also include SIFS.
119 *
120 * rate is in 100 kbps, so divident is multiplied by 10 in the
121 * DIV_ROUND_UP() operations.
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200122 *
123 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
124 * is assumed to be 0 otherwise.
Johannes Bergc2d15602007-07-27 15:43:23 +0200125 */
126
Michal Kazior4ee73f32012-04-11 08:47:56 +0200127 if (band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200128 /*
129 * OFDM:
130 *
131 * N_DBPS = DATARATE x 4
132 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
133 * (16 = SIGNAL time, 6 = tail bits)
134 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
135 *
136 * T_SYM = 4 usec
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200137 * 802.11a - 18.5.2: aSIFSTime = 16 usec
Johannes Bergc2d15602007-07-27 15:43:23 +0200138 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
139 * signal ext = 6 usec
140 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200141 dur = 16; /* SIFS + signal ext */
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200142 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
143 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200144
145 /* IEEE 802.11-2012 18.3.2.4: all values above are:
146 * * times 4 for 5 MHz
147 * * times 2 for 10 MHz
148 */
149 dur *= 1 << shift;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200150
151 /* rates should already consider the channel bandwidth,
152 * don't apply divisor again.
153 */
154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
155 4 * rate); /* T_SYM x N_SYM */
Johannes Bergc2d15602007-07-27 15:43:23 +0200156 } else {
157 /*
158 * 802.11b or 802.11g with 802.11b compatibility:
159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
161 *
162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
163 * aSIFSTime = 10 usec
164 * aPreambleLength = 144 usec or 72 usec with short preamble
165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
166 */
167 dur = 10; /* aSIFSTime = 10 usec */
168 dur += short_preamble ? (72 + 24) : (144 + 48);
169
170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
171 }
172
173 return dur;
174}
175
176/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100177__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
178 struct ieee80211_vif *vif,
Michal Kazior4ee73f32012-04-11 08:47:56 +0200179 enum ieee80211_band band,
Johannes Berg8318d782008-01-24 19:38:38 +0100180 size_t frame_len,
181 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200182{
Johannes Berg25d834e2008-09-12 22:52:47 +0200183 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200184 u16 dur;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200185 int erp, shift = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200186 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200187
Johannes Berg8318d782008-01-24 19:38:38 +0100188 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200189 if (vif) {
190 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200191 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200192 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
193 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200194 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200195 }
Johannes Berg8318d782008-01-24 19:38:38 +0100196
Michal Kazior4ee73f32012-04-11 08:47:56 +0200197 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200198 short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200199
200 return cpu_to_le16(dur);
201}
202EXPORT_SYMBOL(ieee80211_generic_frame_duration);
203
Johannes Berg32bfd352007-12-19 01:31:26 +0100204__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
205 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200206 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200207{
208 struct ieee80211_local *local = hw_to_local(hw);
209 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200210 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100211 bool short_preamble;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200212 int erp, shift = 0, bitrate;
Johannes Bergc2d15602007-07-27 15:43:23 +0200213 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200214 struct ieee80211_supported_band *sband;
215
Michal Kazior4ee73f32012-04-11 08:47:56 +0200216 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200217
Johannes Berg25d834e2008-09-12 22:52:47 +0200218 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200219
Johannes Berge039fa42008-05-15 12:55:29 +0200220 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100221
222 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200223 if (vif) {
224 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200225 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200226 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
227 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200228 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200229 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200230
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200231 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
232
Johannes Bergc2d15602007-07-27 15:43:23 +0200233 /* CTS duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200234 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200235 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200236 /* Data frame duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200237 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200238 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200239 /* ACK duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200240 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200241 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200242
243 return cpu_to_le16(dur);
244}
245EXPORT_SYMBOL(ieee80211_rts_duration);
246
Johannes Berg32bfd352007-12-19 01:31:26 +0100247__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
248 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200249 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200250 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200251{
252 struct ieee80211_local *local = hw_to_local(hw);
253 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200254 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100255 bool short_preamble;
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200256 int erp, shift = 0, bitrate;
Johannes Bergc2d15602007-07-27 15:43:23 +0200257 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200258 struct ieee80211_supported_band *sband;
259
Michal Kazior4ee73f32012-04-11 08:47:56 +0200260 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200261
Johannes Berg25d834e2008-09-12 22:52:47 +0200262 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200263
Johannes Berge039fa42008-05-15 12:55:29 +0200264 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100265 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200266 if (vif) {
267 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200268 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200269 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
270 erp = rate->flags & IEEE80211_RATE_ERP_G;
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200271 shift = ieee80211_vif_get_shift(vif);
Johannes Berg25d834e2008-09-12 22:52:47 +0200272 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200273
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200274 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
275
Johannes Bergc2d15602007-07-27 15:43:23 +0200276 /* Data frame duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200277 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200278 erp, short_preamble, shift);
Johannes Berge039fa42008-05-15 12:55:29 +0200279 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200280 /* ACK duration */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200281 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200282 erp, short_preamble, shift);
Johannes Bergc2d15602007-07-27 15:43:23 +0200283 }
284
Johannes Bergc2d15602007-07-27 15:43:23 +0200285 return cpu_to_le16(dur);
286}
287EXPORT_SYMBOL(ieee80211_ctstoself_duration);
288
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200289void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
290{
291 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200292 int n_acs = IEEE80211_NUM_ACS;
293
294 if (local->hw.queues < IEEE80211_NUM_ACS)
295 n_acs = 1;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200296
297 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
298 int ac;
299
Johannes Bergf142c6b2012-06-18 20:07:15 +0200300 if (!sdata->dev)
301 continue;
302
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200303 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
304 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
305 continue;
306
Johannes Berga6f38ac2012-07-04 12:49:59 +0200307 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200308 int ac_queue = sdata->vif.hw_queue[ac];
309
310 if (ac_queue == queue ||
311 (sdata->vif.cab_queue == queue &&
312 local->queue_stop_reasons[ac_queue] == 0 &&
313 skb_queue_empty(&local->pending[ac_queue])))
314 netif_wake_subqueue(sdata->dev, ac);
315 }
316 }
317}
318
Kalle Valoce7c9112008-12-18 23:35:20 +0200319static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
320 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200321{
322 struct ieee80211_local *local = hw_to_local(hw);
323
Johannes Bergb5878a22010-04-07 16:48:40 +0200324 trace_wake_queue(local, queue, reason);
325
Johannes Berge4e72fb2009-03-23 17:28:42 +0100326 if (WARN_ON(queue >= hw->queues))
327 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200328
Johannes Bergada15122012-03-28 11:04:27 +0200329 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
330 return;
331
Johannes Berg96f5e662009-02-12 00:51:53 +0100332 __clear_bit(reason, &local->queue_stop_reasons[queue]);
333
334 if (local->queue_stop_reasons[queue] != 0)
335 /* someone still has this queue stopped */
336 return;
337
Johannes Berg7236fe22010-03-22 13:42:43 -0700338 if (skb_queue_empty(&local->pending[queue])) {
339 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200340 ieee80211_propagate_queue_wake(local, queue);
Johannes Berg7236fe22010-03-22 13:42:43 -0700341 rcu_read_unlock();
342 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200343 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200344}
Kalle Valoce7c9112008-12-18 23:35:20 +0200345
Johannes Berg96f5e662009-02-12 00:51:53 +0100346void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200348{
349 struct ieee80211_local *local = hw_to_local(hw);
350 unsigned long flags;
351
352 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
353 __ieee80211_wake_queue(hw, queue, reason);
354 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
355}
356
357void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
358{
359 ieee80211_wake_queue_by_reason(hw, queue,
360 IEEE80211_QUEUE_STOP_REASON_DRIVER);
361}
Johannes Bergc2d15602007-07-27 15:43:23 +0200362EXPORT_SYMBOL(ieee80211_wake_queue);
363
Kalle Valoce7c9112008-12-18 23:35:20 +0200364static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
365 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200366{
367 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100368 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200369 int n_acs = IEEE80211_NUM_ACS;
Johannes Bergc2d15602007-07-27 15:43:23 +0200370
Johannes Bergb5878a22010-04-07 16:48:40 +0200371 trace_stop_queue(local, queue, reason);
372
Johannes Berge4e72fb2009-03-23 17:28:42 +0100373 if (WARN_ON(queue >= hw->queues))
374 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100375
Johannes Bergada15122012-03-28 11:04:27 +0200376 if (test_bit(reason, &local->queue_stop_reasons[queue]))
377 return;
378
Johannes Berg2a577d92009-03-23 17:28:37 +0100379 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100380
Johannes Berga6f38ac2012-07-04 12:49:59 +0200381 if (local->hw.queues < IEEE80211_NUM_ACS)
382 n_acs = 1;
383
Johannes Bergcf0277e2010-01-05 18:00:58 +0100384 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200385 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
386 int ac;
387
Johannes Bergf142c6b2012-06-18 20:07:15 +0200388 if (!sdata->dev)
389 continue;
390
Johannes Berga6f38ac2012-07-04 12:49:59 +0200391 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200392 if (sdata->vif.hw_queue[ac] == queue ||
393 sdata->vif.cab_queue == queue)
394 netif_stop_subqueue(sdata->dev, ac);
395 }
396 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100397 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200398}
Kalle Valoce7c9112008-12-18 23:35:20 +0200399
Johannes Berg96f5e662009-02-12 00:51:53 +0100400void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
401 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200402{
403 struct ieee80211_local *local = hw_to_local(hw);
404 unsigned long flags;
405
406 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
407 __ieee80211_stop_queue(hw, queue, reason);
408 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
409}
410
411void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
412{
413 ieee80211_stop_queue_by_reason(hw, queue,
414 IEEE80211_QUEUE_STOP_REASON_DRIVER);
415}
Johannes Bergc2d15602007-07-27 15:43:23 +0200416EXPORT_SYMBOL(ieee80211_stop_queue);
417
Johannes Berg8f77f382009-06-07 21:58:37 +0200418void ieee80211_add_pending_skb(struct ieee80211_local *local,
419 struct sk_buff *skb)
420{
421 struct ieee80211_hw *hw = &local->hw;
422 unsigned long flags;
Johannes Berga7bc3762009-07-27 10:33:31 +0200423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200424 int queue = info->hw_queue;
Johannes Berga7bc3762009-07-27 10:33:31 +0200425
426 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200427 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200428 return;
429 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200430
431 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
432 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200433 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200434 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
Johannes Berge3685e02014-02-20 11:19:58 +0100438void ieee80211_add_pending_skbs(struct ieee80211_local *local,
439 struct sk_buff_head *skbs)
Johannes Berg8f77f382009-06-07 21:58:37 +0200440{
441 struct ieee80211_hw *hw = &local->hw;
442 struct sk_buff *skb;
443 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200444 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200445
446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200447 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200448 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
449
450 if (WARN_ON(!info->control.vif)) {
Felix Fietkaud4fa14c2012-10-10 22:40:23 +0200451 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200452 continue;
453 }
454
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200455 queue = info->hw_queue;
Johannes Berg4644ae82012-03-28 11:04:28 +0200456
457 __ieee80211_stop_queue(hw, queue,
458 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
459
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200460 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200461 }
462
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200463 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200464 __ieee80211_wake_queue(hw, i,
465 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg8f77f382009-06-07 21:58:37 +0200466 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200467}
468
Kalle Valoce7c9112008-12-18 23:35:20 +0200469void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100470 unsigned long queues,
471 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200472{
Kalle Valoce7c9112008-12-18 23:35:20 +0200473 struct ieee80211_local *local = hw_to_local(hw);
474 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200475 int i;
476
Kalle Valoce7c9112008-12-18 23:35:20 +0200477 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
478
Johannes Berg445ea4e2013-02-13 12:25:28 +0100479 for_each_set_bit(i, &queues, hw->queues)
Kalle Valoce7c9112008-12-18 23:35:20 +0200480 __ieee80211_stop_queue(hw, i, reason);
481
482 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
483}
484
485void ieee80211_stop_queues(struct ieee80211_hw *hw)
486{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100487 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
Kalle Valoce7c9112008-12-18 23:35:20 +0200488 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200489}
490EXPORT_SYMBOL(ieee80211_stop_queues);
491
Tomas Winkler92ab8532008-07-24 21:02:04 +0300492int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
493{
494 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200495 unsigned long flags;
496 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100497
Johannes Berge4e72fb2009-03-23 17:28:42 +0100498 if (WARN_ON(queue >= hw->queues))
499 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100500
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Thomas Pedersen2419ea12013-04-10 15:41:40 -0700502 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 &local->queue_stop_reasons[queue]);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
505 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300506}
507EXPORT_SYMBOL(ieee80211_queue_stopped);
508
Kalle Valoce7c9112008-12-18 23:35:20 +0200509void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100510 unsigned long queues,
Kalle Valoce7c9112008-12-18 23:35:20 +0200511 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200512{
Kalle Valoce7c9112008-12-18 23:35:20 +0200513 struct ieee80211_local *local = hw_to_local(hw);
514 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200515 int i;
516
Kalle Valoce7c9112008-12-18 23:35:20 +0200517 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
518
Johannes Berg445ea4e2013-02-13 12:25:28 +0100519 for_each_set_bit(i, &queues, hw->queues)
Kalle Valoce7c9112008-12-18 23:35:20 +0200520 __ieee80211_wake_queue(hw, i, reason);
521
522 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
523}
524
525void ieee80211_wake_queues(struct ieee80211_hw *hw)
526{
Johannes Berg445ea4e2013-02-13 12:25:28 +0100527 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
528 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200529}
530EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100531
Johannes Berg39ecc012013-02-13 12:11:00 +0100532void ieee80211_flush_queues(struct ieee80211_local *local,
533 struct ieee80211_sub_if_data *sdata)
534{
535 u32 queues;
536
537 if (!local->ops->flush)
538 return;
539
540 if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
541 int ac;
542
543 queues = 0;
544
545 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
546 queues |= BIT(sdata->vif.hw_queue[ac]);
547 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
548 queues |= BIT(sdata->vif.cab_queue);
549 } else {
550 /* all queues */
551 queues = BIT(local->hw.queues) - 1;
552 }
553
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300554 ieee80211_stop_queues_by_reason(&local->hw, queues,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100555 IEEE80211_QUEUE_STOP_REASON_FLUSH);
556
Emmanuel Grumbach77be2c52014-03-27 11:30:29 +0200557 drv_flush(local, sdata, queues, false);
Johannes Berg445ea4e2013-02-13 12:25:28 +0100558
Luciano Coelho59f48fe2014-06-13 16:30:04 +0300559 ieee80211_wake_queues_by_reason(&local->hw, queues,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100560 IEEE80211_QUEUE_STOP_REASON_FLUSH);
Johannes Berg39ecc012013-02-13 12:11:00 +0100561}
562
Johannes Bergc7c71062013-08-21 22:07:20 +0200563static void __iterate_active_interfaces(struct ieee80211_local *local,
564 u32 iter_flags,
565 void (*iterator)(void *data, u8 *mac,
566 struct ieee80211_vif *vif),
567 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100568{
Johannes Bergdabeb342007-11-09 01:57:29 +0100569 struct ieee80211_sub_if_data *sdata;
570
Johannes Berge38bad42007-11-28 10:55:32 +0100571 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100572 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200573 case NL80211_IFTYPE_MONITOR:
Felix Fietkau31eba5b2013-05-28 13:01:53 +0200574 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
575 continue;
576 break;
Johannes Berg05c914f2008-09-11 00:01:58 +0200577 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100578 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200579 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100580 break;
581 }
Johannes Berg8b2c9822012-11-06 20:23:30 +0100582 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
583 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
584 continue;
Johannes Berg9607e6b2009-12-23 13:15:31 +0100585 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100586 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100587 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100588 }
Johannes Berge38bad42007-11-28 10:55:32 +0100589
Johannes Bergc7c71062013-08-21 22:07:20 +0200590 sdata = rcu_dereference_check(local->monitor_sdata,
591 lockdep_is_held(&local->iflist_mtx) ||
592 lockdep_rtnl_is_held());
Johannes Berg8b2c9822012-11-06 20:23:30 +0100593 if (sdata &&
594 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
595 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
Johannes Berg685fb722012-07-11 16:38:09 +0200596 iterator(data, sdata->vif.addr, &sdata->vif);
Johannes Bergc7c71062013-08-21 22:07:20 +0200597}
Johannes Berg685fb722012-07-11 16:38:09 +0200598
Johannes Bergc7c71062013-08-21 22:07:20 +0200599void ieee80211_iterate_active_interfaces(
600 struct ieee80211_hw *hw, u32 iter_flags,
601 void (*iterator)(void *data, u8 *mac,
602 struct ieee80211_vif *vif),
603 void *data)
604{
605 struct ieee80211_local *local = hw_to_local(hw);
606
607 mutex_lock(&local->iflist_mtx);
608 __iterate_active_interfaces(local, iter_flags, iterator, data);
609 mutex_unlock(&local->iflist_mtx);
610}
611EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
612
613void ieee80211_iterate_active_interfaces_atomic(
614 struct ieee80211_hw *hw, u32 iter_flags,
615 void (*iterator)(void *data, u8 *mac,
616 struct ieee80211_vif *vif),
617 void *data)
618{
619 struct ieee80211_local *local = hw_to_local(hw);
620
621 rcu_read_lock();
622 __iterate_active_interfaces(local, iter_flags, iterator, data);
Johannes Berge38bad42007-11-28 10:55:32 +0100623 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100624}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200625EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200626
Johannes Bergc7c71062013-08-21 22:07:20 +0200627void ieee80211_iterate_active_interfaces_rtnl(
628 struct ieee80211_hw *hw, u32 iter_flags,
629 void (*iterator)(void *data, u8 *mac,
630 struct ieee80211_vif *vif),
631 void *data)
632{
633 struct ieee80211_local *local = hw_to_local(hw);
634
635 ASSERT_RTNL();
636
637 __iterate_active_interfaces(local, iter_flags, iterator, data);
638}
639EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
640
Johannes Bergad7e7182013-11-13 13:37:47 +0100641struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
642{
643 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
644
645 if (!ieee80211_sdata_running(sdata) ||
646 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
647 return NULL;
648 return &sdata->vif;
649}
650EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
651
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400652/*
653 * Nothing should have been stuffed into the workqueue during
654 * the suspend->resume cycle. If this WARN is seen then there
655 * is a bug with either the driver suspend or something in
656 * mac80211 stuffing into the workqueue which we haven't yet
657 * cleared during mac80211's suspend cycle.
658 */
659static bool ieee80211_can_queue_work(struct ieee80211_local *local)
660{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100661 if (WARN(local->suspended && !local->resuming,
662 "queueing ieee80211 work while going to suspend\n"))
663 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400664
665 return true;
666}
667
668void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
669{
670 struct ieee80211_local *local = hw_to_local(hw);
671
672 if (!ieee80211_can_queue_work(local))
673 return;
674
675 queue_work(local->workqueue, work);
676}
677EXPORT_SYMBOL(ieee80211_queue_work);
678
679void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
680 struct delayed_work *dwork,
681 unsigned long delay)
682{
683 struct ieee80211_local *local = hw_to_local(hw);
684
685 if (!ieee80211_can_queue_work(local))
686 return;
687
688 queue_delayed_work(local->workqueue, dwork, delay);
689}
690EXPORT_SYMBOL(ieee80211_queue_delayed_work);
691
Johannes Berg35d865a2013-05-28 10:54:03 +0200692u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
Johannes Bergdd769862011-11-18 16:54:50 +0100693 struct ieee802_11_elems *elems,
694 u64 filter, u32 crc)
695{
696 size_t left = len;
Johannes Berg35d865a2013-05-28 10:54:03 +0200697 const u8 *pos = start;
Johannes Bergdd769862011-11-18 16:54:50 +0100698 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800699 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergb2e506b2013-03-26 14:54:16 +0100700 const u8 *ie;
Johannes Bergdd769862011-11-18 16:54:50 +0100701
Paul Stewartfcff4f12012-02-23 17:59:53 -0800702 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100703 memset(elems, 0, sizeof(*elems));
704 elems->ie_start = start;
705 elems->total_len = len;
706
707 while (left >= 2) {
708 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800709 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100710
711 id = *pos++;
712 elen = *pos++;
713 left -= 2;
714
Paul Stewartfcff4f12012-02-23 17:59:53 -0800715 if (elen > left) {
716 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100717 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800718 }
719
Johannes Berg9690fb12012-10-24 14:19:53 +0200720 switch (id) {
721 case WLAN_EID_SSID:
722 case WLAN_EID_SUPP_RATES:
723 case WLAN_EID_FH_PARAMS:
724 case WLAN_EID_DS_PARAMS:
725 case WLAN_EID_CF_PARAMS:
726 case WLAN_EID_TIM:
727 case WLAN_EID_IBSS_PARAMS:
728 case WLAN_EID_CHALLENGE:
729 case WLAN_EID_RSN:
730 case WLAN_EID_ERP_INFO:
731 case WLAN_EID_EXT_SUPP_RATES:
732 case WLAN_EID_HT_CAPABILITY:
733 case WLAN_EID_HT_OPERATION:
734 case WLAN_EID_VHT_CAPABILITY:
735 case WLAN_EID_VHT_OPERATION:
736 case WLAN_EID_MESH_ID:
737 case WLAN_EID_MESH_CONFIG:
738 case WLAN_EID_PEER_MGMT:
739 case WLAN_EID_PREQ:
740 case WLAN_EID_PREP:
741 case WLAN_EID_PERR:
742 case WLAN_EID_RANN:
743 case WLAN_EID_CHANNEL_SWITCH:
744 case WLAN_EID_EXT_CHANSWITCH_ANN:
745 case WLAN_EID_COUNTRY:
746 case WLAN_EID_PWR_CONSTRAINT:
747 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg85220d72013-03-25 18:29:27 +0100748 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100749 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -0700750 case WLAN_EID_CHAN_SWITCH_PARAM:
Johannes Bergb2e506b2013-03-26 14:54:16 +0100751 /*
752 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
753 * that if the content gets bigger it might be needed more than once
754 */
Johannes Berg9690fb12012-10-24 14:19:53 +0200755 if (test_bit(id, seen_elems)) {
756 elems->parse_error = true;
757 left -= elen;
758 pos += elen;
759 continue;
760 }
761 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800762 }
Johannes Bergdd769862011-11-18 16:54:50 +0100763
764 if (calc_crc && id < 64 && (filter & (1ULL << id)))
765 crc = crc32_be(crc, pos - 2, elen + 2);
766
Paul Stewartfcff4f12012-02-23 17:59:53 -0800767 elem_parse_failed = false;
768
Johannes Bergdd769862011-11-18 16:54:50 +0100769 switch (id) {
770 case WLAN_EID_SSID:
771 elems->ssid = pos;
772 elems->ssid_len = elen;
773 break;
774 case WLAN_EID_SUPP_RATES:
775 elems->supp_rates = pos;
776 elems->supp_rates_len = elen;
777 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100778 case WLAN_EID_DS_PARAMS:
Johannes Berg1cd8e882013-03-27 14:30:12 +0100779 if (elen >= 1)
780 elems->ds_params = pos;
781 else
782 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100783 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100784 case WLAN_EID_TIM:
785 if (elen >= sizeof(struct ieee80211_tim_ie)) {
786 elems->tim = (void *)pos;
787 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800788 } else
789 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100790 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100791 case WLAN_EID_CHALLENGE:
792 elems->challenge = pos;
793 elems->challenge_len = elen;
794 break;
795 case WLAN_EID_VENDOR_SPECIFIC:
796 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
797 pos[2] == 0xf2) {
798 /* Microsoft OUI (00:50:F2) */
799
800 if (calc_crc)
801 crc = crc32_be(crc, pos - 2, elen + 2);
802
Johannes Berg441a33b2013-02-12 16:27:04 +0100803 if (elen >= 5 && pos[3] == 2) {
Johannes Bergdd769862011-11-18 16:54:50 +0100804 /* OUI Type 2 - WMM IE */
805 if (pos[4] == 0) {
806 elems->wmm_info = pos;
807 elems->wmm_info_len = elen;
808 } else if (pos[4] == 1) {
809 elems->wmm_param = pos;
810 elems->wmm_param_len = elen;
811 }
812 }
813 }
814 break;
815 case WLAN_EID_RSN:
816 elems->rsn = pos;
817 elems->rsn_len = elen;
818 break;
819 case WLAN_EID_ERP_INFO:
Johannes Berg1946bed2013-03-27 14:31:53 +0100820 if (elen >= 1)
821 elems->erp_info = pos;
822 else
823 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100824 break;
825 case WLAN_EID_EXT_SUPP_RATES:
826 elems->ext_supp_rates = pos;
827 elems->ext_supp_rates_len = elen;
828 break;
829 case WLAN_EID_HT_CAPABILITY:
830 if (elen >= sizeof(struct ieee80211_ht_cap))
831 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800832 else
833 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100834 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100835 case WLAN_EID_HT_OPERATION:
836 if (elen >= sizeof(struct ieee80211_ht_operation))
837 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800838 else
839 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100840 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000841 case WLAN_EID_VHT_CAPABILITY:
842 if (elen >= sizeof(struct ieee80211_vht_cap))
843 elems->vht_cap_elem = (void *)pos;
844 else
845 elem_parse_failed = true;
846 break;
847 case WLAN_EID_VHT_OPERATION:
848 if (elen >= sizeof(struct ieee80211_vht_operation))
849 elems->vht_operation = (void *)pos;
850 else
851 elem_parse_failed = true;
852 break;
Johannes Bergbee7f582013-02-07 22:24:55 +0100853 case WLAN_EID_OPMODE_NOTIF:
854 if (elen > 0)
855 elems->opmode_notif = pos;
856 else
857 elem_parse_failed = true;
858 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100859 case WLAN_EID_MESH_ID:
860 elems->mesh_id = pos;
861 elems->mesh_id_len = elen;
862 break;
863 case WLAN_EID_MESH_CONFIG:
864 if (elen >= sizeof(struct ieee80211_meshconf_ie))
865 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800866 else
867 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100868 break;
869 case WLAN_EID_PEER_MGMT:
870 elems->peering = pos;
871 elems->peering_len = elen;
872 break;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100873 case WLAN_EID_MESH_AWAKE_WINDOW:
874 if (elen >= 2)
875 elems->awake_window = (void *)pos;
876 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100877 case WLAN_EID_PREQ:
878 elems->preq = pos;
879 elems->preq_len = elen;
880 break;
881 case WLAN_EID_PREP:
882 elems->prep = pos;
883 elems->prep_len = elen;
884 break;
885 case WLAN_EID_PERR:
886 elems->perr = pos;
887 elems->perr_len = elen;
888 break;
889 case WLAN_EID_RANN:
890 if (elen >= sizeof(struct ieee80211_rann_ie))
891 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800892 else
893 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100894 break;
895 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200896 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
897 elem_parse_failed = true;
898 break;
899 }
900 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100901 break;
Johannes Bergb4f286a12013-03-26 14:13:58 +0100902 case WLAN_EID_EXT_CHANSWITCH_ANN:
903 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
904 elem_parse_failed = true;
905 break;
906 }
907 elems->ext_chansw_ie = (void *)pos;
908 break;
Johannes Berg85220d72013-03-25 18:29:27 +0100909 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
910 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
911 elem_parse_failed = true;
912 break;
913 }
914 elems->sec_chan_offs = (void *)pos;
915 break;
Chun-Yeow Yeoh8f2535b2013-10-14 19:08:27 -0700916 case WLAN_EID_CHAN_SWITCH_PARAM:
917 if (elen !=
918 sizeof(*elems->mesh_chansw_params_ie)) {
919 elem_parse_failed = true;
920 break;
921 }
922 elems->mesh_chansw_params_ie = (void *)pos;
923 break;
Johannes Bergb2e506b2013-03-26 14:54:16 +0100924 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
925 if (!action ||
926 elen != sizeof(*elems->wide_bw_chansw_ie)) {
927 elem_parse_failed = true;
928 break;
929 }
930 elems->wide_bw_chansw_ie = (void *)pos;
931 break;
932 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
933 if (action) {
934 elem_parse_failed = true;
935 break;
936 }
937 /*
938 * This is a bit tricky, but as we only care about
939 * the wide bandwidth channel switch element, so
940 * just parse it out manually.
941 */
942 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
943 pos, elen);
944 if (ie) {
945 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
946 elems->wide_bw_chansw_ie =
947 (void *)(ie + 2);
948 else
949 elem_parse_failed = true;
950 }
951 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100952 case WLAN_EID_COUNTRY:
953 elems->country_elem = pos;
954 elems->country_elem_len = elen;
955 break;
956 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +0200957 if (elen != 1) {
958 elem_parse_failed = true;
959 break;
960 }
Johannes Bergdd769862011-11-18 16:54:50 +0100961 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100962 break;
963 case WLAN_EID_TIMEOUT_INTERVAL:
Johannes Berg79ba1d82013-03-27 14:38:07 +0100964 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
965 elems->timeout_int = (void *)pos;
966 else
967 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100968 break;
969 default:
970 break;
971 }
972
Paul Stewartfcff4f12012-02-23 17:59:53 -0800973 if (elem_parse_failed)
974 elems->parse_error = true;
975 else
Johannes Berg5df45692012-10-24 14:22:37 +0200976 __set_bit(id, seen_elems);
Paul Stewartfcff4f12012-02-23 17:59:53 -0800977
Johannes Bergdd769862011-11-18 16:54:50 +0100978 left -= elen;
979 pos += elen;
980 }
981
Paul Stewartfcff4f12012-02-23 17:59:53 -0800982 if (left != 0)
983 elems->parse_error = true;
984
Johannes Bergdd769862011-11-18 16:54:50 +0100985 return crc;
986}
987
Johannes Berg3abead52012-03-02 15:56:59 +0100988void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
989 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200990{
991 struct ieee80211_local *local = sdata->local;
992 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +0200993 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +0200994 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200995 bool use_11b, enable_qos;
Johannes Bergaa837e12009-05-07 16:16:24 +0200996 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200997
998 if (!local->ops->conf_tx)
999 return;
1000
Johannes Berg54bcbc62012-03-28 11:04:25 +02001001 if (local->hw.queues < IEEE80211_NUM_ACS)
1002 return;
1003
Johannes Berg5825fe102008-09-09 12:56:01 +02001004 memset(&qparam, 0, sizeof(qparam));
1005
Johannes Berg55de9082012-07-26 17:24:39 +02001006 rcu_read_lock();
1007 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1008 use_11b = (chanctx_conf &&
Johannes Berg4bf88532012-11-09 11:39:59 +01001009 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +02001010 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +02001011 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +02001012
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001013 /*
1014 * By default disable QoS in STA mode for old access points, which do
1015 * not support 802.11e. New APs will provide proper queue parameters,
1016 * that we will configure later.
1017 */
1018 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1019
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001020 /* Set defaults according to 802.11-2007 Table 7-37 */
1021 aCWmax = 1023;
1022 if (use_11b)
1023 aCWmin = 31;
1024 else
1025 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +02001026
Fred Zhou1f4ffde2013-09-09 23:03:41 +08001027 /* Confiure old 802.11b/g medium access rules. */
1028 qparam.cw_max = aCWmax;
1029 qparam.cw_min = aCWmin;
1030 qparam.txop = 0;
1031 qparam.aifs = 2;
1032
1033 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1034 /* Update if QoS is enabled. */
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001035 if (enable_qos) {
1036 switch (ac) {
1037 case IEEE80211_AC_BK:
1038 qparam.cw_max = aCWmax;
1039 qparam.cw_min = aCWmin;
1040 qparam.txop = 0;
1041 qparam.aifs = 7;
1042 break;
1043 /* never happens but let's not leave undefined */
1044 default:
1045 case IEEE80211_AC_BE:
1046 qparam.cw_max = aCWmax;
1047 qparam.cw_min = aCWmin;
1048 qparam.txop = 0;
1049 qparam.aifs = 3;
1050 break;
1051 case IEEE80211_AC_VI:
1052 qparam.cw_max = aCWmin;
1053 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1054 if (use_11b)
1055 qparam.txop = 6016/32;
1056 else
1057 qparam.txop = 3008/32;
1058 qparam.aifs = 2;
1059 break;
1060 case IEEE80211_AC_VO:
1061 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1062 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1063 if (use_11b)
1064 qparam.txop = 3264/32;
1065 else
1066 qparam.txop = 1504/32;
1067 qparam.aifs = 2;
1068 break;
1069 }
Johannes Bergaa837e12009-05-07 16:16:24 +02001070 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001071
Kalle Valoab133152010-01-12 10:42:31 +02001072 qparam.uapsd = false;
1073
Johannes Berg54bcbc62012-03-28 11:04:25 +02001074 sdata->tx_conf[ac] = qparam;
1075 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +02001076 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +02001077
Johannes Bergf142c6b2012-06-18 20:07:15 +02001078 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1079 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +02001080 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +01001081 if (bss_notify)
1082 ieee80211_bss_info_change_notify(sdata,
1083 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +05301084 }
Johannes Berg5825fe102008-09-09 12:56:01 +02001085}
Johannes Berge50db652008-09-09 15:07:09 +02001086
Johannes Berg46900292009-02-15 12:44:28 +01001087void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001088 u16 transaction, u16 auth_alg, u16 status,
Johannes Berg4a3cb702013-02-12 16:43:19 +01001089 const u8 *extra, size_t extra_len, const u8 *da,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001090 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1091 u32 tx_flags)
Johannes Berg46900292009-02-15 12:44:28 +01001092{
1093 struct ieee80211_local *local = sdata->local;
1094 struct sk_buff *skb;
1095 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001096 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001097
Fred Zhou15e230a2013-09-24 10:33:01 +08001098 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1099 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -07001100 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001101 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001102
Johannes Berg46900292009-02-15 12:44:28 +01001103 skb_reserve(skb, local->hw.extra_tx_headroom);
1104
1105 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1106 memset(mgmt, 0, 24 + 6);
1107 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1108 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001109 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001110 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001111 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1112 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1113 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001114 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001115 if (extra)
1116 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001117
Johannes Bergfffd0932009-07-08 14:22:54 +02001118 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1119 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1120 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1121 WARN_ON(err);
1122 }
1123
Johannes Berg1672c0e32013-01-29 15:02:27 +01001124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1125 tx_flags;
Johannes Berg62ae67b2009-11-18 18:42:05 +01001126 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001127}
1128
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001129void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1130 const u8 *bssid, u16 stype, u16 reason,
1131 bool send_frame, u8 *frame_buf)
1132{
1133 struct ieee80211_local *local = sdata->local;
1134 struct sk_buff *skb;
1135 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1136
1137 /* build frame */
1138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1139 mgmt->duration = 0; /* initialize only */
1140 mgmt->seq_ctrl = 0; /* initialize only */
1141 memcpy(mgmt->da, bssid, ETH_ALEN);
1142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1143 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1144 /* u.deauth.reason_code == u.disassoc.reason_code */
1145 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1146
1147 if (send_frame) {
1148 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1149 IEEE80211_DEAUTH_FRAME_LEN);
1150 if (!skb)
1151 return;
1152
1153 skb_reserve(skb, local->hw.extra_tx_headroom);
1154
1155 /* copy in frame */
1156 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1157 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1158
1159 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1160 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1161 IEEE80211_SKB_CB(skb)->flags |=
1162 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1163
1164 ieee80211_tx_skb(sdata, skb);
1165 }
1166}
1167
Johannes Bergde95a542009-04-01 11:58:36 +02001168int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Bergc604b9f2012-11-29 12:45:18 +01001169 size_t buffer_len, const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +03001170 enum ieee80211_band band, u32 rate_mask,
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001171 struct cfg80211_chan_def *chandef)
Johannes Bergde95a542009-04-01 11:58:36 +02001172{
1173 struct ieee80211_supported_band *sband;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001174 u8 *pos = buffer, *end = buffer + buffer_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001175 size_t offset = 0, noffset;
1176 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001177 u8 rates[32];
1178 int num_rates;
1179 int ext_rates_len;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001180 int shift;
1181 u32 rate_flags;
Johannes Bergde95a542009-04-01 11:58:36 +02001182
Johannes Berg4d36ec52009-10-27 20:59:55 +01001183 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001184 if (WARN_ON_ONCE(!sband))
1185 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001186
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001187 rate_flags = ieee80211_chandef_rate_flags(chandef);
1188 shift = ieee80211_chandef_get_shift(chandef);
1189
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001190 num_rates = 0;
1191 for (i = 0; i < sband->n_bitrates; i++) {
1192 if ((BIT(i) & rate_mask) == 0)
1193 continue; /* skip rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001194 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1195 continue;
1196
1197 rates[num_rates++] =
1198 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1199 (1 << shift) * 5);
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001200 }
1201
1202 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001203
Johannes Bergc604b9f2012-11-29 12:45:18 +01001204 if (end - pos < 2 + supp_rates_len)
1205 goto out_err;
Johannes Bergde95a542009-04-01 11:58:36 +02001206 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001207 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001208 memcpy(pos, rates, supp_rates_len);
1209 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001210
Johannes Berg8e664fb2009-12-23 13:15:38 +01001211 /* insert "request information" if in custom IEs */
1212 if (ie && ie_len) {
1213 static const u8 before_extrates[] = {
1214 WLAN_EID_SSID,
1215 WLAN_EID_SUPP_RATES,
1216 WLAN_EID_REQUEST,
1217 };
1218 noffset = ieee80211_ie_split(ie, ie_len,
1219 before_extrates,
1220 ARRAY_SIZE(before_extrates),
1221 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001222 if (end - pos < noffset - offset)
1223 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001224 memcpy(pos, ie + offset, noffset - offset);
1225 pos += noffset - offset;
1226 offset = noffset;
1227 }
Johannes Bergde95a542009-04-01 11:58:36 +02001228
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001229 ext_rates_len = num_rates - supp_rates_len;
1230 if (ext_rates_len > 0) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001231 if (end - pos < 2 + ext_rates_len)
1232 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001233 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001234 *pos++ = ext_rates_len;
1235 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1236 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001237 }
1238
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001239 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
Johannes Bergc604b9f2012-11-29 12:45:18 +01001240 if (end - pos < 3)
1241 goto out_err;
Jouni Malinen651b5222010-08-28 19:37:51 +03001242 *pos++ = WLAN_EID_DS_PARAMS;
1243 *pos++ = 1;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001244 *pos++ = ieee80211_frequency_to_channel(
1245 chandef->chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001246 }
1247
Johannes Berg8e664fb2009-12-23 13:15:38 +01001248 /* insert custom IEs that go before HT */
1249 if (ie && ie_len) {
1250 static const u8 before_ht[] = {
1251 WLAN_EID_SSID,
1252 WLAN_EID_SUPP_RATES,
1253 WLAN_EID_REQUEST,
1254 WLAN_EID_EXT_SUPP_RATES,
1255 WLAN_EID_DS_PARAMS,
1256 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1257 };
1258 noffset = ieee80211_ie_split(ie, ie_len,
1259 before_ht, ARRAY_SIZE(before_ht),
1260 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001261 if (end - pos < noffset - offset)
1262 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001263 memcpy(pos, ie + offset, noffset - offset);
1264 pos += noffset - offset;
1265 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001266 }
1267
Johannes Bergc604b9f2012-11-29 12:45:18 +01001268 if (sband->ht_cap.ht_supported) {
1269 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1270 goto out_err;
Ben Greearef96a8422011-11-18 11:32:00 -08001271 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1272 sband->ht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001273 }
Johannes Berg5ef2d412009-03-31 12:12:07 +02001274
Johannes Bergde95a542009-04-01 11:58:36 +02001275 /*
1276 * If adding more here, adjust code in main.c
1277 * that calculates local->scan_ies_len.
1278 */
1279
Johannes Berg4d952302014-02-04 09:48:34 +01001280 /* insert custom IEs that go before VHT */
Johannes Berg8e664fb2009-12-23 13:15:38 +01001281 if (ie && ie_len) {
Johannes Berg4d952302014-02-04 09:48:34 +01001282 static const u8 before_vht[] = {
1283 WLAN_EID_SSID,
1284 WLAN_EID_SUPP_RATES,
1285 WLAN_EID_REQUEST,
1286 WLAN_EID_EXT_SUPP_RATES,
1287 WLAN_EID_DS_PARAMS,
1288 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1289 WLAN_EID_HT_CAPABILITY,
1290 WLAN_EID_BSS_COEX_2040,
1291 WLAN_EID_EXT_CAPABILITY,
1292 WLAN_EID_SSID_LIST,
1293 WLAN_EID_CHANNEL_USAGE,
1294 WLAN_EID_INTERWORKING,
1295 /* mesh ID can't happen here */
1296 /* 60 GHz can't happen here right now */
1297 };
1298 noffset = ieee80211_ie_split(ie, ie_len,
1299 before_vht, ARRAY_SIZE(before_vht),
1300 offset);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001301 if (end - pos < noffset - offset)
1302 goto out_err;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001303 memcpy(pos, ie + offset, noffset - offset);
1304 pos += noffset - offset;
Johannes Berg4d952302014-02-04 09:48:34 +01001305 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001306 }
1307
Johannes Bergc604b9f2012-11-29 12:45:18 +01001308 if (sband->vht_cap.vht_supported) {
1309 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1310 goto out_err;
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00001311 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1312 sband->vht_cap.cap);
Johannes Bergc604b9f2012-11-29 12:45:18 +01001313 }
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00001314
Johannes Berg4d952302014-02-04 09:48:34 +01001315 /* add any remaining custom IEs */
1316 if (ie && ie_len) {
1317 noffset = ie_len;
1318 if (end - pos < noffset - offset)
1319 goto out_err;
1320 memcpy(pos, ie + offset, noffset - offset);
1321 pos += noffset - offset;
1322 }
1323
Johannes Bergde95a542009-04-01 11:58:36 +02001324 return pos - buffer;
Johannes Bergc604b9f2012-11-29 12:45:18 +01001325 out_err:
1326 WARN_ONCE(1, "not enough space for preq IEs\n");
1327 return pos - buffer;
Johannes Bergde95a542009-04-01 11:58:36 +02001328}
1329
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001330struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001331 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001332 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001333 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001334 const u8 *ie, size_t ie_len,
1335 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001336{
1337 struct ieee80211_local *local = sdata->local;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001338 struct cfg80211_chan_def chandef;
Johannes Berg46900292009-02-15 12:44:28 +01001339 struct sk_buff *skb;
1340 struct ieee80211_mgmt *mgmt;
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001341 int ies_len;
Johannes Berg46900292009-02-15 12:44:28 +01001342
Paul Stewarta806c552011-06-23 09:00:11 -08001343 /*
1344 * Do not send DS Channel parameter for directed probe requests
1345 * in order to maximize the chance that we get a response. Some
1346 * badly-behaved APs don't respond when this parameter is included.
1347 */
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001348 chandef.width = sdata->vif.bss_conf.chandef.width;
Paul Stewarta806c552011-06-23 09:00:11 -08001349 if (directed)
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001350 chandef.chan = NULL;
Paul Stewarta806c552011-06-23 09:00:11 -08001351 else
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001352 chandef.chan = chan;
Jouni Malinen651b5222010-08-28 19:37:51 +03001353
Kalle Valo7c12ce82010-01-05 20:16:44 +02001354 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001355 ssid, ssid_len, 100 + ie_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001356 if (!skb)
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001357 return NULL;
1358
1359 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1360 skb_tailroom(skb),
Johannes Bergc604b9f2012-11-29 12:45:18 +01001361 ie, ie_len, chan->band,
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001362 ratemask, &chandef);
Johannes Bergb9a9ada2012-11-29 13:00:10 +01001363 skb_put(skb, ies_len);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001364
Johannes Berg46900292009-02-15 12:44:28 +01001365 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001366 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001367 memcpy(mgmt->da, dst, ETH_ALEN);
1368 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001369 }
Johannes Berg46900292009-02-15 12:44:28 +01001370
Johannes Berg62ae67b2009-11-18 18:42:05 +01001371 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001372
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001373 return skb;
1374}
1375
1376void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1377 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001378 const u8 *ie, size_t ie_len,
Johannes Berg1672c0e32013-01-29 15:02:27 +01001379 u32 ratemask, bool directed, u32 tx_flags,
Johannes Berg55de9082012-07-26 17:24:39 +02001380 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001381{
1382 struct sk_buff *skb;
1383
Johannes Bergfe94fe02012-07-30 12:26:34 +02001384 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001385 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001386 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301387 if (skb) {
Johannes Berg1672c0e32013-01-29 15:02:27 +01001388 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
Johannes Berg55de9082012-07-26 17:24:39 +02001389 if (scan)
1390 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1391 else
1392 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301393 }
Johannes Berg46900292009-02-15 12:44:28 +01001394}
1395
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001396u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
Johannes Berg46900292009-02-15 12:44:28 +01001397 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001398 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001399{
1400 struct ieee80211_supported_band *sband;
Johannes Berg46900292009-02-15 12:44:28 +01001401 size_t num_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001402 u32 supp_rates, rate_flags;
1403 int i, j, shift;
1404 sband = sdata->local->hw.wiphy->bands[band];
1405
1406 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1407 shift = ieee80211_vif_get_shift(&sdata->vif);
Johannes Berg46900292009-02-15 12:44:28 +01001408
Michal Kazior4ee73f32012-04-11 08:47:56 +02001409 if (WARN_ON(!sband))
1410 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001411
Johannes Berg46900292009-02-15 12:44:28 +01001412 num_rates = sband->n_bitrates;
1413 supp_rates = 0;
1414 for (i = 0; i < elems->supp_rates_len +
1415 elems->ext_supp_rates_len; i++) {
1416 u8 rate = 0;
1417 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001418 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001419 if (i < elems->supp_rates_len)
1420 rate = elems->supp_rates[i];
1421 else if (elems->ext_supp_rates)
1422 rate = elems->ext_supp_rates
1423 [i - elems->supp_rates_len];
1424 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001425 is_basic = !!(rate & 0x80);
1426
1427 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1428 continue;
1429
1430 for (j = 0; j < num_rates; j++) {
Simon Wunderlich2103dec2013-07-08 16:55:53 +02001431 int brate;
1432 if ((rate_flags & sband->bitrates[j].flags)
1433 != rate_flags)
1434 continue;
1435
1436 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1437 1 << shift);
1438
1439 if (brate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001440 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001441 if (basic_rates && is_basic)
1442 *basic_rates |= BIT(j);
1443 }
1444 }
Johannes Berg46900292009-02-15 12:44:28 +01001445 }
1446 return supp_rates;
1447}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001448
Johannes Berg84f6a012009-08-20 20:02:20 +02001449void ieee80211_stop_device(struct ieee80211_local *local)
1450{
1451 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001452 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001453
1454 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001455
1456 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001457 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001458}
1459
Johannes Bergf6837ba82014-04-30 14:19:04 +02001460static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1461{
1462 struct ieee80211_sub_if_data *sdata;
1463 struct ieee80211_chanctx *ctx;
1464
1465 /*
1466 * We get here if during resume the device can't be restarted properly.
1467 * We might also get here if this happens during HW reset, which is a
1468 * slightly different situation and we need to drop all connections in
1469 * the latter case.
1470 *
1471 * Ask cfg80211 to turn off all interfaces, this will result in more
1472 * warnings but at least we'll then get into a clean stopped state.
1473 */
1474
1475 local->resuming = false;
1476 local->suspended = false;
1477 local->started = false;
1478
1479 /* scheduled scan clearly can't be running any more, but tell
1480 * cfg80211 and clear local state
1481 */
1482 ieee80211_sched_scan_end(local);
1483
1484 list_for_each_entry(sdata, &local->interfaces, list)
1485 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1486
1487 /* Mark channel contexts as not being in the driver any more to avoid
1488 * removing them from the driver during the shutdown process...
1489 */
1490 mutex_lock(&local->chanctx_mtx);
1491 list_for_each_entry(ctx, &local->chanctx_list, list)
1492 ctx->driver_present = false;
1493 mutex_unlock(&local->chanctx_mtx);
1494
1495 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1496}
1497
Stanislaw Gruszka153a5fc2013-02-28 10:55:30 +01001498static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1499 struct ieee80211_sub_if_data *sdata)
1500{
1501 struct ieee80211_chanctx_conf *conf;
1502 struct ieee80211_chanctx *ctx;
1503
1504 if (!local->use_chanctx)
1505 return;
1506
1507 mutex_lock(&local->chanctx_mtx);
1508 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1509 lockdep_is_held(&local->chanctx_mtx));
1510 if (conf) {
1511 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1512 drv_assign_vif_chanctx(local, sdata, ctx);
1513 }
1514 mutex_unlock(&local->chanctx_mtx);
1515}
1516
Johannes Bergf2753dd2009-04-14 10:09:24 +02001517int ieee80211_reconfig(struct ieee80211_local *local)
1518{
1519 struct ieee80211_hw *hw = &local->hw;
1520 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001521 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001522 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001523 int res, i;
Johannes Bergd8881302013-01-10 23:55:33 +01001524 bool reconfig_due_to_wowlan = false;
David Spinadeld43c6b62013-12-08 21:48:57 +02001525 struct ieee80211_sub_if_data *sched_scan_sdata;
1526 bool sched_scan_stopped = false;
Johannes Bergd8881302013-01-10 23:55:33 +01001527
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001528#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001529 if (local->suspended)
1530 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001531
Johannes Bergeecc4802011-05-04 15:37:29 +02001532 if (local->wowlan) {
Johannes Bergeecc4802011-05-04 15:37:29 +02001533 res = drv_resume(local);
Johannes Berg27b3eb92013-08-07 20:11:55 +02001534 local->wowlan = false;
Johannes Bergeecc4802011-05-04 15:37:29 +02001535 if (res < 0) {
1536 local->resuming = false;
1537 return res;
1538 }
1539 if (res == 0)
1540 goto wake_up;
1541 WARN_ON(res > 1);
1542 /*
1543 * res is 1, which means the driver requested
1544 * to go through a regular reset on wakeup.
1545 */
Johannes Bergd8881302013-01-10 23:55:33 +01001546 reconfig_due_to_wowlan = true;
Johannes Bergeecc4802011-05-04 15:37:29 +02001547 }
1548#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001549 /* everything else happens only if HW was up & running */
1550 if (!local->open_count)
1551 goto wake_up;
1552
1553 /*
1554 * Upon resume hardware can sometimes be goofy due to
1555 * various platform / driver / bus issues, so restarting
1556 * the device may at times not work immediately. Propagate
1557 * the error.
1558 */
1559 res = drv_start(local);
1560 if (res) {
Johannes Bergf6837ba82014-04-30 14:19:04 +02001561 if (local->suspended)
1562 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1563 else
1564 WARN(1, "Hardware became unavailable during restart.\n");
1565 ieee80211_handle_reconfig_failure(local);
Johannes Berg94f9b972011-07-14 16:48:54 +02001566 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001567 }
1568
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301569 /* setup fragmentation threshold */
1570 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1571
1572 /* setup RTS threshold */
1573 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1574
1575 /* reset coverage class */
1576 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1577
Johannes Berg94f9b972011-07-14 16:48:54 +02001578 ieee80211_led_radio(local, true);
1579 ieee80211_mod_tpt_led_trig(local,
1580 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1581
Johannes Bergf2753dd2009-04-14 10:09:24 +02001582 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001583 sdata = rtnl_dereference(local->monitor_sdata);
1584 if (sdata) {
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001585 /* in HW restart it exists already */
1586 WARN_ON(local->resuming);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001587 res = drv_add_interface(local, sdata);
1588 if (WARN_ON(res)) {
Monam Agarwal0c2bef462014-03-24 00:51:43 +05301589 RCU_INIT_POINTER(local->monitor_sdata, NULL);
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001590 synchronize_net();
1591 kfree(sdata);
1592 }
1593 }
1594
Johannes Bergf2753dd2009-04-14 10:09:24 +02001595 list_for_each_entry(sdata, &local->interfaces, list) {
1596 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1597 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001598 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001599 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001600 }
1601
Johannes Berg55de9082012-07-26 17:24:39 +02001602 /* add channel contexts */
Arend van Sprielf0dea9c2012-11-19 12:01:05 +01001603 if (local->use_chanctx) {
1604 mutex_lock(&local->chanctx_mtx);
1605 list_for_each_entry(ctx, &local->chanctx_list, list)
1606 WARN_ON(drv_add_chanctx(local, ctx));
1607 mutex_unlock(&local->chanctx_mtx);
Johannes Berg55de9082012-07-26 17:24:39 +02001608
Zhao, Gang7df180f2014-04-26 09:43:40 +08001609 list_for_each_entry(sdata, &local->interfaces, list) {
1610 if (!ieee80211_sdata_running(sdata))
1611 continue;
1612 ieee80211_assign_chanctx(local, sdata);
1613 }
Johannes Berg6352c872012-11-07 12:40:41 +01001614
Zhao, Gang7df180f2014-04-26 09:43:40 +08001615 sdata = rtnl_dereference(local->monitor_sdata);
1616 if (sdata && ieee80211_sdata_running(sdata))
1617 ieee80211_assign_chanctx(local, sdata);
1618 }
Johannes Bergfe5f2552012-11-19 22:19:08 +01001619
Johannes Bergf2753dd2009-04-14 10:09:24 +02001620 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001621 mutex_lock(&local->sta_mtx);
1622 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001623 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001624
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001625 if (!sta->uploaded)
1626 continue;
1627
1628 /* AP-mode stations will be added later */
1629 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1630 continue;
1631
1632 for (state = IEEE80211_STA_NOTEXIST;
1633 state < sta->sta_state; state++)
1634 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1635 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001636 }
Johannes Berg34e89502010-02-03 13:59:58 +01001637 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001638
Eliad Peller2683d652011-07-14 20:29:42 +03001639 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001640 if (hw->queues >= IEEE80211_NUM_ACS) {
1641 list_for_each_entry(sdata, &local->interfaces, list) {
1642 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1643 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1644 !ieee80211_sdata_running(sdata))
1645 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001646
Johannes Berg54bcbc62012-03-28 11:04:25 +02001647 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1648 drv_conf_tx(local, sdata, i,
1649 &sdata->tx_conf[i]);
1650 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001651 }
Eliad Peller2683d652011-07-14 20:29:42 +03001652
Johannes Bergf2753dd2009-04-14 10:09:24 +02001653 /* reconfigure hardware */
1654 ieee80211_hw_config(local, ~0);
1655
Johannes Bergf2753dd2009-04-14 10:09:24 +02001656 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001657
1658 /* Finally also reconfigure all the BSS information */
1659 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001660 u32 changed;
1661
Johannes Berg9607e6b2009-12-23 13:15:31 +01001662 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001663 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001664
1665 /* common change flags for all interface types */
1666 changed = BSS_CHANGED_ERP_CTS_PROT |
1667 BSS_CHANGED_ERP_PREAMBLE |
1668 BSS_CHANGED_ERP_SLOT |
1669 BSS_CHANGED_HT |
1670 BSS_CHANGED_BASIC_RATES |
1671 BSS_CHANGED_BEACON_INT |
1672 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001673 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001674 BSS_CHANGED_QOS |
Johannes Berg1ea6f9c2012-10-24 10:59:25 +02001675 BSS_CHANGED_IDLE |
1676 BSS_CHANGED_TXPOWER;
Johannes Bergac8dd502010-05-05 09:44:02 +02001677
Johannes Bergf2753dd2009-04-14 10:09:24 +02001678 switch (sdata->vif.type) {
1679 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001680 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001681 BSS_CHANGED_ARP_FILTER |
1682 BSS_CHANGED_PS;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001683
Alexander Bondar989c6502013-05-16 17:34:17 +03001684 /* Re-send beacon info report to the driver */
1685 if (sdata->u.mgd.have_beacon)
1686 changed |= BSS_CHANGED_BEACON_INFO;
Emmanuel Grumbachc65dd142012-12-12 10:12:24 +02001687
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001688 sdata_lock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001689 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Berg8d61ffa2013-05-10 12:32:47 +02001690 sdata_unlock(sdata);
Johannes Bergac8dd502010-05-05 09:44:02 +02001691 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001692 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001693 changed |= BSS_CHANGED_IBSS;
1694 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001695 case NL80211_IFTYPE_AP:
Johannes Berg339afbf2012-11-14 15:21:17 +01001696 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001697
Johannes Berg10416382012-10-19 15:44:42 +02001698 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001699 changed |= BSS_CHANGED_AP_PROBE_RESP;
1700
Johannes Berg10416382012-10-19 15:44:42 +02001701 if (rcu_access_pointer(sdata->u.ap.beacon))
1702 drv_start_ap(local, sdata);
1703 }
1704
Arik Nemtsov78274932011-09-04 11:11:32 +03001705 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001706 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg8da34932012-12-14 14:17:26 +01001707 if (sdata->vif.bss_conf.enable_beacon) {
1708 changed |= BSS_CHANGED_BEACON |
1709 BSS_CHANGED_BEACON_ENABLED;
1710 ieee80211_bss_info_change_notify(sdata, changed);
1711 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001712 break;
1713 case NL80211_IFTYPE_WDS:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001714 case NL80211_IFTYPE_AP_VLAN:
1715 case NL80211_IFTYPE_MONITOR:
Johannes Berg98104fde2012-06-16 00:19:54 +02001716 case NL80211_IFTYPE_P2P_DEVICE:
Zhao, Gangb2057862014-04-26 09:43:41 +08001717 /* nothing to do */
Johannes Bergf142c6b2012-06-18 20:07:15 +02001718 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001719 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001720 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001721 case NL80211_IFTYPE_P2P_CLIENT:
1722 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001723 WARN_ON(1);
1724 break;
1725 }
1726 }
1727
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001728 ieee80211_recalc_ps(local, -1);
1729
Johannes Berg2a419052010-06-10 10:21:29 +02001730 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001731 * The sta might be in psm against the ap (e.g. because
1732 * this was the state before a hw restart), so we
1733 * explicitly send a null packet in order to make sure
1734 * it'll sync against the ap (and get out of psm).
1735 */
1736 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1737 list_for_each_entry(sdata, &local->interfaces, list) {
1738 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1739 continue;
Johannes Berg20f544e2012-11-08 14:06:28 +01001740 if (!sdata->u.mgd.associated)
1741 continue;
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001742
1743 ieee80211_send_nullfunc(local, sdata, 0);
1744 }
1745 }
1746
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001747 /* APs are now beaconing, add back stations */
1748 mutex_lock(&local->sta_mtx);
1749 list_for_each_entry(sta, &local->sta_list, list) {
1750 enum ieee80211_sta_state state;
1751
1752 if (!sta->uploaded)
1753 continue;
1754
1755 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1756 continue;
1757
1758 for (state = IEEE80211_STA_NOTEXIST;
1759 state < sta->sta_state; state++)
1760 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1761 state + 1));
1762 }
1763 mutex_unlock(&local->sta_mtx);
1764
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001765 /* add back keys */
1766 list_for_each_entry(sdata, &local->interfaces, list)
1767 if (ieee80211_sdata_running(sdata))
1768 ieee80211_enable_keys(sdata);
1769
Eliad Pellerc6209482012-07-02 15:08:25 +03001770 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001771 local->in_reconfig = false;
1772 barrier();
1773
Johannes Berg3c3e21e2013-03-27 23:20:27 +01001774 if (local->monitors == local->open_count && local->monitors > 0)
1775 ieee80211_add_virtual_monitor(local);
1776
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001777 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001778 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1779 * sessions can be established after a resume.
1780 *
1781 * Also tear down aggregation sessions since reconfiguring
1782 * them in a hardware restart scenario is not easily done
1783 * right now, and the hardware will have lost information
1784 * about the sessions, but we and the AP still think they
1785 * are active. This is really a workaround though.
1786 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001787 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001788 mutex_lock(&local->sta_mtx);
1789
1790 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergc82c4a82012-07-18 13:31:31 +02001791 ieee80211_sta_tear_down_BA_sessions(
1792 sta, AGG_STOP_LOCAL_REQUEST);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001793 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001794 }
Johannes Berg2a419052010-06-10 10:21:29 +02001795
1796 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001797 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001798
Johannes Berg445ea4e2013-02-13 12:25:28 +01001799 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1800 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001801
Johannes Berg5bb644a2009-05-17 11:40:42 +02001802 /*
Arik Nemtsov32769812014-02-11 12:27:19 +02001803 * Reconfigure sched scan if it was interrupted by FW restart or
1804 * suspend.
1805 */
1806 mutex_lock(&local->mtx);
1807 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1808 lockdep_is_held(&local->mtx));
1809 if (sched_scan_sdata && local->sched_scan_req)
1810 /*
1811 * Sched scan stopped, but we don't want to report it. Instead,
1812 * we're trying to reschedule.
1813 */
1814 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1815 local->sched_scan_req))
1816 sched_scan_stopped = true;
1817 mutex_unlock(&local->mtx);
1818
1819 if (sched_scan_stopped)
Eliad Pellere669ba22014-04-30 16:14:24 +03001820 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
Arik Nemtsov32769812014-02-11 12:27:19 +02001821
1822 /*
Johannes Berg5bb644a2009-05-17 11:40:42 +02001823 * If this is for hw restart things are still running.
1824 * We may want to change that later, however.
1825 */
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001826 if (!local->suspended || reconfig_due_to_wowlan)
Johannes Berg9214ad72012-11-06 19:18:13 +01001827 drv_restart_complete(local);
Johannes Berg8f21b0a2013-01-11 00:28:01 +01001828
1829 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001830 return 0;
1831
1832#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001833 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001834 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001835 mb();
1836 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001837
Johannes Bergb8360ab2013-04-29 14:57:44 +02001838 list_for_each_entry(sdata, &local->interfaces, list) {
1839 if (!ieee80211_sdata_running(sdata))
1840 continue;
1841 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1842 ieee80211_sta_restart(sdata);
1843 }
1844
Johannes Berg26d59532011-04-01 13:52:48 +02001845 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001846#else
1847 WARN_ON(1);
1848#endif
David Spinadeld43c6b62013-12-08 21:48:57 +02001849
Johannes Bergf2753dd2009-04-14 10:09:24 +02001850 return 0;
1851}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001852
Johannes Berg95acac62011-07-12 12:30:59 +02001853void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1854{
1855 struct ieee80211_sub_if_data *sdata;
1856 struct ieee80211_local *local;
1857 struct ieee80211_key *key;
1858
1859 if (WARN_ON(!vif))
1860 return;
1861
1862 sdata = vif_to_sdata(vif);
1863 local = sdata->local;
1864
1865 if (WARN_ON(!local->resuming))
1866 return;
1867
1868 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1869 return;
1870
1871 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1872
1873 mutex_lock(&local->key_mtx);
1874 list_for_each_entry(key, &sdata->key_list, list)
1875 key->flags |= KEY_FLAG_TAINTED;
1876 mutex_unlock(&local->key_mtx);
1877}
1878EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1879
Johannes Berg04ecd252012-09-11 14:34:12 +02001880void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01001881{
Johannes Berg04ecd252012-09-11 14:34:12 +02001882 struct ieee80211_local *local = sdata->local;
1883 struct ieee80211_chanctx_conf *chanctx_conf;
1884 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01001885
Johannes Berg04ecd252012-09-11 14:34:12 +02001886 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001887
Johannes Berg04ecd252012-09-11 14:34:12 +02001888 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1889 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01001890
Johannes Berg04ecd252012-09-11 14:34:12 +02001891 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02001892 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01001893
Johannes Berg04ecd252012-09-11 14:34:12 +02001894 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1895 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02001896 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02001897 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001898}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001899
Eliad Peller21f659b2013-11-11 20:14:01 +02001900void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1901{
1902 struct ieee80211_local *local = sdata->local;
1903 struct ieee80211_chanctx_conf *chanctx_conf;
1904 struct ieee80211_chanctx *chanctx;
1905
1906 mutex_lock(&local->chanctx_mtx);
1907
1908 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1909 lockdep_is_held(&local->chanctx_mtx));
1910
1911 if (WARN_ON_ONCE(!chanctx_conf))
1912 goto unlock;
1913
1914 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1915 ieee80211_recalc_chanctx_min_def(local, chanctx);
1916 unlock:
1917 mutex_unlock(&local->chanctx_mtx);
1918}
1919
Johannes Berg8e664fb2009-12-23 13:15:38 +01001920static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1921{
1922 int i;
1923
1924 for (i = 0; i < n_ids; i++)
1925 if (ids[i] == id)
1926 return true;
1927 return false;
1928}
1929
1930/**
1931 * ieee80211_ie_split - split an IE buffer according to ordering
1932 *
1933 * @ies: the IE buffer
1934 * @ielen: the length of the IE buffer
1935 * @ids: an array with element IDs that are allowed before
1936 * the split
1937 * @n_ids: the size of the element ID array
1938 * @offset: offset where to start splitting in the buffer
1939 *
1940 * This function splits an IE buffer by updating the @offset
1941 * variable to point to the location where the buffer should be
1942 * split.
1943 *
1944 * It assumes that the given IE buffer is well-formed, this
1945 * has to be guaranteed by the caller!
1946 *
1947 * It also assumes that the IEs in the buffer are ordered
1948 * correctly, if not the result of using this function will not
1949 * be ordered correctly either, i.e. it does no reordering.
1950 *
1951 * The function returns the offset where the next part of the
1952 * buffer starts, which may be @ielen if the entire (remainder)
1953 * of the buffer should be used.
1954 */
1955size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1956 const u8 *ids, int n_ids, size_t offset)
1957{
1958 size_t pos = offset;
1959
1960 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1961 pos += 2 + ies[pos + 1];
1962
1963 return pos;
1964}
1965
1966size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1967{
1968 size_t pos = offset;
1969
1970 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1971 pos += 2 + ies[pos + 1];
1972
1973 return pos;
1974}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001975
1976static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1977 int rssi_min_thold,
1978 int rssi_max_thold)
1979{
1980 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1981
1982 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1983 return;
1984
1985 /*
1986 * Scale up threshold values before storing it, as the RSSI averaging
1987 * algorithm uses a scaled up value as well. Change this scaling
1988 * factor if the RSSI averaging algorithm changes.
1989 */
1990 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1991 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1992}
1993
1994void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1995 int rssi_min_thold,
1996 int rssi_max_thold)
1997{
1998 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1999
2000 WARN_ON(rssi_min_thold == rssi_max_thold ||
2001 rssi_min_thold > rssi_max_thold);
2002
2003 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2004 rssi_max_thold);
2005}
2006EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2007
2008void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2009{
2010 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2011
2012 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2013}
2014EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03002015
Ben Greearef96a8422011-11-18 11:32:00 -08002016u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07002017 u16 cap)
2018{
2019 __le16 tmp;
2020
2021 *pos++ = WLAN_EID_HT_CAPABILITY;
2022 *pos++ = sizeof(struct ieee80211_ht_cap);
2023 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2024
2025 /* capability flags */
2026 tmp = cpu_to_le16(cap);
2027 memcpy(pos, &tmp, sizeof(u16));
2028 pos += sizeof(u16);
2029
2030 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08002031 *pos++ = ht_cap->ampdu_factor |
2032 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07002033 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2034
2035 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08002036 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2037 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002038
2039 /* extended capabilities */
2040 pos += sizeof(__le16);
2041
2042 /* BF capabilities */
2043 pos += sizeof(__le32);
2044
2045 /* antenna selection */
2046 pos += sizeof(u8);
2047
2048 return pos;
2049}
2050
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002051u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
Johannes Bergcc3983d2012-12-07 12:45:06 +01002052 u32 cap)
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002053{
2054 __le32 tmp;
2055
2056 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00002057 *pos++ = sizeof(struct ieee80211_vht_cap);
2058 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa22012-07-02 11:25:12 +00002059
2060 /* capability flags */
2061 tmp = cpu_to_le32(cap);
2062 memcpy(pos, &tmp, sizeof(u32));
2063 pos += sizeof(u32);
2064
2065 /* VHT MCS set */
2066 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2067 pos += sizeof(vht_cap->vht_mcs);
2068
2069 return pos;
2070}
2071
Johannes Berg074d46d2012-03-15 19:45:16 +01002072u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Johannes Berg4bf88532012-11-09 11:39:59 +01002073 const struct cfg80211_chan_def *chandef,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002074 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002075{
Johannes Berg074d46d2012-03-15 19:45:16 +01002076 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002077 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01002078 *pos++ = WLAN_EID_HT_OPERATION;
2079 *pos++ = sizeof(struct ieee80211_ht_operation);
2080 ht_oper = (struct ieee80211_ht_operation *)pos;
Johannes Berg4bf88532012-11-09 11:39:59 +01002081 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2082 chandef->chan->center_freq);
2083 switch (chandef->width) {
2084 case NL80211_CHAN_WIDTH_160:
2085 case NL80211_CHAN_WIDTH_80P80:
2086 case NL80211_CHAN_WIDTH_80:
2087 case NL80211_CHAN_WIDTH_40:
2088 if (chandef->center_freq1 > chandef->chan->center_freq)
2089 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2090 else
2091 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002092 break;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002093 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01002094 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002095 break;
2096 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07002097 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
Johannes Berg4bf88532012-11-09 11:39:59 +01002098 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2099 chandef->width != NL80211_CHAN_WIDTH_20)
Johannes Berg074d46d2012-03-15 19:45:16 +01002100 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01002101
Ashok Nagarajan431e3152012-04-30 14:20:29 -07002102 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01002103 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07002104
2105 /* It seems that Basic MCS set and Supported MCS set
2106 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01002107 memset(&ht_oper->basic_set, 0, 16);
2108 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002109
Johannes Berg074d46d2012-03-15 19:45:16 +01002110 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002111}
2112
Johannes Berg4bf88532012-11-09 11:39:59 +01002113void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
Johannes Berg4a3cb702013-02-12 16:43:19 +01002114 const struct ieee80211_ht_operation *ht_oper,
Johannes Berg4bf88532012-11-09 11:39:59 +01002115 struct cfg80211_chan_def *chandef)
Alexander Simon42e7aa72011-10-26 14:47:26 -07002116{
2117 enum nl80211_channel_type channel_type;
2118
Johannes Berg4bf88532012-11-09 11:39:59 +01002119 if (!ht_oper) {
2120 cfg80211_chandef_create(chandef, control_chan,
2121 NL80211_CHAN_NO_HT);
2122 return;
2123 }
Alexander Simon42e7aa72011-10-26 14:47:26 -07002124
Johannes Berg074d46d2012-03-15 19:45:16 +01002125 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07002126 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2127 channel_type = NL80211_CHAN_HT20;
2128 break;
2129 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2130 channel_type = NL80211_CHAN_HT40PLUS;
2131 break;
2132 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2133 channel_type = NL80211_CHAN_HT40MINUS;
2134 break;
2135 default:
2136 channel_type = NL80211_CHAN_NO_HT;
2137 }
2138
Johannes Berg4bf88532012-11-09 11:39:59 +01002139 cfg80211_chandef_create(chandef, control_chan, channel_type);
Alexander Simon42e7aa72011-10-26 14:47:26 -07002140}
2141
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002142int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2143 const struct ieee80211_supported_band *sband,
2144 const u8 *srates, int srates_len, u32 *rates)
2145{
2146 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2147 int shift = ieee80211_chandef_get_shift(chandef);
2148 struct ieee80211_rate *br;
2149 int brate, rate, i, j, count = 0;
2150
2151 *rates = 0;
2152
2153 for (i = 0; i < srates_len; i++) {
2154 rate = srates[i] & 0x7f;
2155
2156 for (j = 0; j < sband->n_bitrates; j++) {
2157 br = &sband->bitrates[j];
2158 if ((rate_flags & br->flags) != rate_flags)
2159 continue;
2160
2161 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2162 if (brate == rate) {
2163 *rates |= BIT(j);
2164 count++;
2165 break;
2166 }
2167 }
2168 }
2169 return count;
2170}
2171
Johannes Bergfc8a7322012-06-28 10:33:25 +02002172int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002173 struct sk_buff *skb, bool need_basic,
2174 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002175{
Arik Nemtsov768db342011-09-28 14:12:51 +03002176 struct ieee80211_local *local = sdata->local;
2177 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002178 int rate, shift;
Arik Nemtsov768db342011-09-28 14:12:51 +03002179 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002180 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002181 u32 rate_flags;
Arik Nemtsov768db342011-09-28 14:12:51 +03002182
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002183 shift = ieee80211_vif_get_shift(&sdata->vif);
2184 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
Johannes Berg6b778632012-07-23 14:53:27 +02002185 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002186 rates = 0;
2187 for (i = 0; i < sband->n_bitrates; i++) {
2188 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2189 continue;
2190 rates++;
2191 }
Arik Nemtsov768db342011-09-28 14:12:51 +03002192 if (rates > 8)
2193 rates = 8;
2194
2195 if (skb_tailroom(skb) < rates + 2)
2196 return -ENOMEM;
2197
2198 pos = skb_put(skb, rates + 2);
2199 *pos++ = WLAN_EID_SUPP_RATES;
2200 *pos++ = rates;
2201 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002202 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002203 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2204 continue;
2205
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002206 if (need_basic && basic_rates & BIT(i))
2207 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03002208 rate = sband->bitrates[i].bitrate;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002209 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2210 5 * (1 << shift));
2211 *pos++ = basic | (u8) rate;
Arik Nemtsov768db342011-09-28 14:12:51 +03002212 }
2213
2214 return 0;
2215}
2216
Johannes Bergfc8a7322012-06-28 10:33:25 +02002217int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02002218 struct sk_buff *skb, bool need_basic,
2219 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03002220{
Arik Nemtsov768db342011-09-28 14:12:51 +03002221 struct ieee80211_local *local = sdata->local;
2222 struct ieee80211_supported_band *sband;
Chun-Yeow Yeohcc63ec72013-09-07 23:40:44 -07002223 int rate, shift;
Arik Nemtsov768db342011-09-28 14:12:51 +03002224 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02002225 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002226 u32 rate_flags;
2227
2228 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2229 shift = ieee80211_vif_get_shift(&sdata->vif);
Arik Nemtsov768db342011-09-28 14:12:51 +03002230
Johannes Berg6b778632012-07-23 14:53:27 +02002231 sband = local->hw.wiphy->bands[band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002232 exrates = 0;
2233 for (i = 0; i < sband->n_bitrates; i++) {
2234 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2235 continue;
2236 exrates++;
2237 }
2238
Arik Nemtsov768db342011-09-28 14:12:51 +03002239 if (exrates > 8)
2240 exrates -= 8;
2241 else
2242 exrates = 0;
2243
2244 if (skb_tailroom(skb) < exrates + 2)
2245 return -ENOMEM;
2246
2247 if (exrates) {
2248 pos = skb_put(skb, exrates + 2);
2249 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2250 *pos++ = exrates;
2251 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002252 u8 basic = 0;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002253 if ((rate_flags & sband->bitrates[i].flags)
2254 != rate_flags)
2255 continue;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07002256 if (need_basic && basic_rates & BIT(i))
2257 basic = 0x80;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002258 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2259 5 * (1 << shift));
2260 *pos++ = basic | (u8) rate;
Arik Nemtsov768db342011-09-28 14:12:51 +03002261 }
2262 }
2263 return 0;
2264}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002265
2266int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2267{
2268 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2269 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2270
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07002271 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2272 /* non-managed type inferfaces */
2273 return 0;
2274 }
Emmanuel Grumbach3a7bba62013-03-20 17:05:45 +02002275 return ifmgd->ave_beacon_signal / 16;
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07002276}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07002277EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02002278
2279u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2280{
2281 if (!mcs)
2282 return 1;
2283
2284 /* TODO: consider rx_highest */
2285
2286 if (mcs->rx_mask[3])
2287 return 4;
2288 if (mcs->rx_mask[2])
2289 return 3;
2290 if (mcs->rx_mask[1])
2291 return 2;
2292 return 1;
2293}
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002294
2295/**
2296 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2297 * @local: mac80211 hw info struct
2298 * @status: RX status
2299 * @mpdu_len: total MPDU length (including FCS)
2300 * @mpdu_offset: offset into MPDU to calculate timestamp at
2301 *
2302 * This function calculates the RX timestamp at the given MPDU offset, taking
2303 * into account what the RX timestamp was. An offset of 0 will just normalize
2304 * the timestamp to TSF at beginning of MPDU reception.
2305 */
2306u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2307 struct ieee80211_rx_status *status,
2308 unsigned int mpdu_len,
2309 unsigned int mpdu_offset)
2310{
2311 u64 ts = status->mactime;
2312 struct rate_info ri;
2313 u16 rate;
2314
2315 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2316 return 0;
2317
2318 memset(&ri, 0, sizeof(ri));
2319
2320 /* Fill cfg80211 rate info */
2321 if (status->flag & RX_FLAG_HT) {
2322 ri.mcs = status->rate_idx;
2323 ri.flags |= RATE_INFO_FLAGS_MCS;
2324 if (status->flag & RX_FLAG_40MHZ)
2325 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2326 if (status->flag & RX_FLAG_SHORT_GI)
2327 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Johannes Berg56146182012-11-09 15:07:02 +01002328 } else if (status->flag & RX_FLAG_VHT) {
2329 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2330 ri.mcs = status->rate_idx;
2331 ri.nss = status->vht_nss;
2332 if (status->flag & RX_FLAG_40MHZ)
2333 ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002334 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002335 ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002336 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002337 ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
Emmanuel Grumbach1b8d2422014-02-05 16:37:11 +02002338 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
Johannes Berg56146182012-11-09 15:07:02 +01002339 ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2340 if (status->flag & RX_FLAG_SHORT_GI)
2341 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002342 } else {
2343 struct ieee80211_supported_band *sband;
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002344 int shift = 0;
2345 int bitrate;
2346
2347 if (status->flag & RX_FLAG_10MHZ)
2348 shift = 1;
2349 if (status->flag & RX_FLAG_5MHZ)
2350 shift = 2;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002351
2352 sband = local->hw.wiphy->bands[status->band];
Simon Wunderlich2103dec2013-07-08 16:55:53 +02002353 bitrate = sband->bitrates[status->rate_idx].bitrate;
2354 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002355 }
2356
2357 rate = cfg80211_calculate_bitrate(&ri);
Johannes Bergd86aa4f2013-10-11 15:47:06 +02002358 if (WARN_ONCE(!rate,
2359 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2360 status->flag, status->rate_idx, status->vht_nss))
2361 return 0;
Thomas Pedersenf4bda332012-11-13 10:46:27 -08002362
2363 /* rewind from end of MPDU */
2364 if (status->flag & RX_FLAG_MACTIME_END)
2365 ts -= mpdu_len * 8 * 10 / rate;
2366
2367 ts += mpdu_offset * 8 * 10 / rate;
2368
2369 return ts;
2370}
Simon Wunderlich164eb022013-02-08 18:16:20 +01002371
2372void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2373{
2374 struct ieee80211_sub_if_data *sdata;
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002375 struct cfg80211_chan_def chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002376
Johannes Berg34a37402013-12-18 09:43:33 +01002377 mutex_lock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002378 mutex_lock(&local->iflist_mtx);
2379 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg34a37402013-12-18 09:43:33 +01002380 /* it might be waiting for the local->mtx, but then
2381 * by the time it gets it, sdata->wdev.cac_started
2382 * will no longer be true
2383 */
2384 cancel_delayed_work(&sdata->dfs_cac_timer_work);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002385
2386 if (sdata->wdev.cac_started) {
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002387 chandef = sdata->vif.bss_conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002388 ieee80211_vif_release_channel(sdata);
2389 cfg80211_cac_event(sdata->dev,
Janusz Dziedzicd2859df2013-11-06 13:55:51 +01002390 &chandef,
Simon Wunderlich164eb022013-02-08 18:16:20 +01002391 NL80211_RADAR_CAC_ABORTED,
2392 GFP_KERNEL);
2393 }
2394 }
2395 mutex_unlock(&local->iflist_mtx);
Johannes Berg34a37402013-12-18 09:43:33 +01002396 mutex_unlock(&local->mtx);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002397}
2398
2399void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2400{
2401 struct ieee80211_local *local =
2402 container_of(work, struct ieee80211_local, radar_detected_work);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002403 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
Simon Wunderlich164eb022013-02-08 18:16:20 +01002404
2405 ieee80211_dfs_cac_cancel(local);
2406
2407 if (local->use_chanctx)
2408 /* currently not handled */
2409 WARN_ON(1);
Janusz Dziedzic84a3d1c2013-11-05 14:48:46 +01002410 else
Simon Wunderlich164eb022013-02-08 18:16:20 +01002411 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
Simon Wunderlich164eb022013-02-08 18:16:20 +01002412}
2413
2414void ieee80211_radar_detected(struct ieee80211_hw *hw)
2415{
2416 struct ieee80211_local *local = hw_to_local(hw);
2417
2418 trace_api_radar_detected(local);
2419
2420 ieee80211_queue_work(hw, &local->radar_detected_work);
2421}
2422EXPORT_SYMBOL(ieee80211_radar_detected);
Simon Wunderliche6b7cde2013-08-28 13:41:29 +02002423
2424u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2425{
2426 u32 ret;
2427 int tmp;
2428
2429 switch (c->width) {
2430 case NL80211_CHAN_WIDTH_20:
2431 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2432 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2433 break;
2434 case NL80211_CHAN_WIDTH_40:
2435 c->width = NL80211_CHAN_WIDTH_20;
2436 c->center_freq1 = c->chan->center_freq;
2437 ret = IEEE80211_STA_DISABLE_40MHZ |
2438 IEEE80211_STA_DISABLE_VHT;
2439 break;
2440 case NL80211_CHAN_WIDTH_80:
2441 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2442 /* n_P40 */
2443 tmp /= 2;
2444 /* freq_P40 */
2445 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2446 c->width = NL80211_CHAN_WIDTH_40;
2447 ret = IEEE80211_STA_DISABLE_VHT;
2448 break;
2449 case NL80211_CHAN_WIDTH_80P80:
2450 c->center_freq2 = 0;
2451 c->width = NL80211_CHAN_WIDTH_80;
2452 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2453 IEEE80211_STA_DISABLE_160MHZ;
2454 break;
2455 case NL80211_CHAN_WIDTH_160:
2456 /* n_P20 */
2457 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2458 /* n_P80 */
2459 tmp /= 4;
2460 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2461 c->width = NL80211_CHAN_WIDTH_80;
2462 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2463 IEEE80211_STA_DISABLE_160MHZ;
2464 break;
2465 default:
2466 case NL80211_CHAN_WIDTH_20_NOHT:
2467 WARN_ON_ONCE(1);
2468 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2469 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2470 break;
2471 case NL80211_CHAN_WIDTH_5:
2472 case NL80211_CHAN_WIDTH_10:
2473 WARN_ON_ONCE(1);
2474 /* keep c->width */
2475 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2476 break;
2477 }
2478
2479 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2480
2481 return ret;
2482}
Emmanuel Grumbach687da132013-10-01 16:45:43 +03002483
2484/*
2485 * Returns true if smps_mode_new is strictly more restrictive than
2486 * smps_mode_old.
2487 */
2488bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2489 enum ieee80211_smps_mode smps_mode_new)
2490{
2491 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2492 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2493 return false;
2494
2495 switch (smps_mode_old) {
2496 case IEEE80211_SMPS_STATIC:
2497 return false;
2498 case IEEE80211_SMPS_DYNAMIC:
2499 return smps_mode_new == IEEE80211_SMPS_STATIC;
2500 case IEEE80211_SMPS_OFF:
2501 return smps_mode_new != IEEE80211_SMPS_OFF;
2502 default:
2503 WARN_ON(1);
2504 }
2505
2506 return false;
2507}
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002508
2509int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2510 struct cfg80211_csa_settings *csa_settings)
2511{
2512 struct sk_buff *skb;
2513 struct ieee80211_mgmt *mgmt;
2514 struct ieee80211_local *local = sdata->local;
2515 int freq;
2516 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2517 sizeof(mgmt->u.action.u.chan_switch);
2518 u8 *pos;
2519
2520 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2521 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2522 return -EOPNOTSUPP;
2523
2524 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2525 5 + /* channel switch announcement element */
2526 3 + /* secondary channel offset element */
2527 8); /* mesh channel switch parameters element */
2528 if (!skb)
2529 return -ENOMEM;
2530
2531 skb_reserve(skb, local->tx_headroom);
2532 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2533 memset(mgmt, 0, hdr_len);
2534 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2535 IEEE80211_STYPE_ACTION);
2536
2537 eth_broadcast_addr(mgmt->da);
2538 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2539 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2540 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2541 } else {
2542 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2543 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2544 }
2545 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2546 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2547 pos = skb_put(skb, 5);
2548 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2549 *pos++ = 3; /* IE length */
2550 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2551 freq = csa_settings->chandef.chan->center_freq;
2552 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2553 *pos++ = csa_settings->count; /* count */
2554
2555 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2556 enum nl80211_channel_type ch_type;
2557
2558 skb_put(skb, 3);
2559 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2560 *pos++ = 1; /* IE length */
2561 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2562 if (ch_type == NL80211_CHAN_HT40PLUS)
2563 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2564 else
2565 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2566 }
2567
2568 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2569 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002570
2571 skb_put(skb, 8);
2572 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2573 *pos++ = 6; /* IE length */
2574 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2575 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2576 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2577 *pos++ |= csa_settings->block_tx ?
2578 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2579 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2580 pos += 2;
Chun-Yeow Yeohca91dc92013-11-12 10:31:48 +08002581 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002582 pos += 2;
Chun-Yeow Yeohc6da6742013-10-14 19:08:28 -07002583 }
2584
2585 ieee80211_tx_skb(sdata, skb);
2586 return 0;
2587}
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002588
2589bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2590{
2591 return !(cs == NULL || cs->cipher == 0 ||
2592 cs->hdr_len < cs->pn_len + cs->pn_off ||
2593 cs->hdr_len <= cs->key_idx_off ||
2594 cs->key_idx_shift > 7 ||
2595 cs->key_idx_mask == 0);
2596}
2597
2598bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2599{
2600 int i;
2601
2602 /* Ensure we have enough iftype bitmap space for all iftype values */
2603 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2604
2605 for (i = 0; i < n; i++)
2606 if (!ieee80211_cs_valid(&cs[i]))
2607 return false;
2608
2609 return true;
2610}
2611
2612const struct ieee80211_cipher_scheme *
2613ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2614 enum nl80211_iftype iftype)
2615{
2616 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2617 int n = local->hw.n_cipher_schemes;
2618 int i;
2619 const struct ieee80211_cipher_scheme *cs = NULL;
2620
2621 for (i = 0; i < n; i++) {
2622 if (l[i].cipher == cipher) {
2623 cs = &l[i];
2624 break;
2625 }
2626 }
2627
2628 if (!cs || !(cs->iftype & BIT(iftype)))
2629 return NULL;
2630
2631 return cs;
2632}
2633
2634int ieee80211_cs_headroom(struct ieee80211_local *local,
2635 struct cfg80211_crypto_settings *crypto,
2636 enum nl80211_iftype iftype)
2637{
2638 const struct ieee80211_cipher_scheme *cs;
2639 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2640 int i;
2641
2642 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2643 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2644 iftype);
2645
2646 if (cs && headroom < cs->hdr_len)
2647 headroom = cs->hdr_len;
2648 }
2649
2650 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2651 if (cs && headroom < cs->hdr_len)
2652 headroom = cs->hdr_len;
2653
2654 return headroom;
2655}
Felix Fietkaua7022e62013-12-16 21:49:14 +01002656
2657static bool
2658ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2659{
2660 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2661 int skip;
2662
2663 if (end > 0)
2664 return false;
2665
2666 /* End time is in the past, check for repetitions */
2667 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2668 if (data->count[i] < 255) {
2669 if (data->count[i] <= skip) {
2670 data->count[i] = 0;
2671 return false;
2672 }
2673
2674 data->count[i] -= skip;
2675 }
2676
2677 data->desc[i].start += skip * data->desc[i].interval;
2678
2679 return true;
2680}
2681
2682static bool
2683ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2684 s32 *offset)
2685{
2686 bool ret = false;
2687 int i;
2688
2689 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2690 s32 cur;
2691
2692 if (!data->count[i])
2693 continue;
2694
2695 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2696 ret = true;
2697
2698 cur = data->desc[i].start - tsf;
2699 if (cur > *offset)
2700 continue;
2701
2702 cur = data->desc[i].start + data->desc[i].duration - tsf;
2703 if (cur > *offset)
2704 *offset = cur;
2705 }
2706
2707 return ret;
2708}
2709
2710static u32
2711ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2712{
2713 s32 offset = 0;
2714 int tries = 0;
2715 /*
2716 * arbitrary limit, used to avoid infinite loops when combined NoA
2717 * descriptors cover the full time period.
2718 */
2719 int max_tries = 5;
2720
2721 ieee80211_extend_absent_time(data, tsf, &offset);
2722 do {
2723 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2724 break;
2725
2726 tries++;
2727 } while (tries < max_tries);
2728
2729 return offset;
2730}
2731
2732void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2733{
2734 u32 next_offset = BIT(31) - 1;
2735 int i;
2736
2737 data->absent = 0;
2738 data->has_next_tsf = false;
2739 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2740 s32 start;
2741
2742 if (!data->count[i])
2743 continue;
2744
2745 ieee80211_extend_noa_desc(data, tsf, i);
2746 start = data->desc[i].start - tsf;
2747 if (start <= 0)
2748 data->absent |= BIT(i);
2749
2750 if (next_offset > start)
2751 next_offset = start;
2752
2753 data->has_next_tsf = true;
2754 }
2755
2756 if (data->absent)
2757 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2758
2759 data->next_tsf = tsf + next_offset;
2760}
2761EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2762
2763int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2764 struct ieee80211_noa_data *data, u32 tsf)
2765{
2766 int ret = 0;
2767 int i;
2768
2769 memset(data, 0, sizeof(*data));
2770
2771 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2772 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2773
2774 if (!desc->count || !desc->duration)
2775 continue;
2776
2777 data->count[i] = desc->count;
2778 data->desc[i].start = le32_to_cpu(desc->start_time);
2779 data->desc[i].duration = le32_to_cpu(desc->duration);
2780 data->desc[i].interval = le32_to_cpu(desc->interval);
2781
2782 if (data->count[i] > 1 &&
2783 data->desc[i].interval < data->desc[i].duration)
2784 continue;
2785
2786 ieee80211_extend_noa_desc(data, tsf, i);
2787 ret++;
2788 }
2789
2790 if (ret)
2791 ieee80211_update_p2p_noa(data, tsf);
2792
2793 return ret;
2794}
2795EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
Thomas Pedersen057d5f42013-12-19 10:25:15 -08002796
2797void ieee80211_recalc_dtim(struct ieee80211_local *local,
2798 struct ieee80211_sub_if_data *sdata)
2799{
2800 u64 tsf = drv_get_tsf(local, sdata);
2801 u64 dtim_count = 0;
2802 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2803 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2804 struct ps_data *ps;
2805 u8 bcns_from_dtim;
2806
2807 if (tsf == -1ULL || !beacon_int || !dtim_period)
2808 return;
2809
2810 if (sdata->vif.type == NL80211_IFTYPE_AP ||
2811 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2812 if (!sdata->bss)
2813 return;
2814
2815 ps = &sdata->bss->ps;
2816 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2817 ps = &sdata->u.mesh.ps;
2818 } else {
2819 return;
2820 }
2821
2822 /*
2823 * actually finds last dtim_count, mac80211 will update in
2824 * __beacon_add_tim().
2825 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2826 */
2827 do_div(tsf, beacon_int);
2828 bcns_from_dtim = do_div(tsf, dtim_period);
2829 /* just had a DTIM */
2830 if (!bcns_from_dtim)
2831 dtim_count = 0;
2832 else
2833 dtim_count = dtim_period - bcns_from_dtim;
2834
2835 ps->dtim_count = dtim_count;
2836}
Luciano Coelho73de86a2014-02-13 11:31:59 +02002837
2838int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2839 const struct cfg80211_chan_def *chandef,
2840 enum ieee80211_chanctx_mode chanmode,
2841 u8 radar_detect)
2842{
2843 struct ieee80211_local *local = sdata->local;
2844 struct ieee80211_sub_if_data *sdata_iter;
2845 enum nl80211_iftype iftype = sdata->wdev.iftype;
2846 int num[NUM_NL80211_IFTYPES];
2847 struct ieee80211_chanctx *ctx;
Luciano Coelhob6a55012014-02-27 11:07:21 +02002848 int num_different_channels = 0;
Luciano Coelho73de86a2014-02-13 11:31:59 +02002849 int total = 1;
2850
2851 lockdep_assert_held(&local->chanctx_mtx);
2852
2853 if (WARN_ON(hweight32(radar_detect) > 1))
2854 return -EINVAL;
2855
Luciano Coelhob6a55012014-02-27 11:07:21 +02002856 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2857 !chandef->chan))
Luciano Coelho73de86a2014-02-13 11:31:59 +02002858 return -EINVAL;
2859
Luciano Coelhob6a55012014-02-27 11:07:21 +02002860 if (chandef)
2861 num_different_channels = 1;
2862
Luciano Coelho73de86a2014-02-13 11:31:59 +02002863 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
2864 return -EINVAL;
2865
2866 /* Always allow software iftypes */
2867 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
2868 if (radar_detect)
2869 return -EINVAL;
2870 return 0;
2871 }
2872
2873 memset(num, 0, sizeof(num));
2874
2875 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
2876 num[iftype] = 1;
2877
2878 list_for_each_entry(ctx, &local->chanctx_list, list) {
2879 if (ctx->conf.radar_enabled)
2880 radar_detect |= BIT(ctx->conf.def.width);
2881 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
2882 num_different_channels++;
2883 continue;
2884 }
Luciano Coelhob6a55012014-02-27 11:07:21 +02002885 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
Luciano Coelho73de86a2014-02-13 11:31:59 +02002886 cfg80211_chandef_compatible(chandef,
2887 &ctx->conf.def))
2888 continue;
2889 num_different_channels++;
2890 }
2891
2892 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
2893 struct wireless_dev *wdev_iter;
2894
2895 wdev_iter = &sdata_iter->wdev;
2896
2897 if (sdata_iter == sdata ||
2898 rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
2899 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
2900 continue;
2901
2902 num[wdev_iter->iftype]++;
2903 total++;
2904 }
2905
2906 if (total == 1 && !radar_detect)
2907 return 0;
2908
2909 return cfg80211_check_combinations(local->hw.wiphy,
2910 num_different_channels,
2911 radar_detect, num);
2912}
Michal Kazior6fa001b2014-04-09 15:29:23 +02002913
2914static void
2915ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
2916 void *data)
2917{
2918 u32 *max_num_different_channels = data;
2919
2920 *max_num_different_channels = max(*max_num_different_channels,
2921 c->num_different_channels);
2922}
2923
2924int ieee80211_max_num_channels(struct ieee80211_local *local)
2925{
2926 struct ieee80211_sub_if_data *sdata;
2927 int num[NUM_NL80211_IFTYPES] = {};
2928 struct ieee80211_chanctx *ctx;
2929 int num_different_channels = 0;
2930 u8 radar_detect = 0;
2931 u32 max_num_different_channels = 1;
2932 int err;
2933
2934 lockdep_assert_held(&local->chanctx_mtx);
2935
2936 list_for_each_entry(ctx, &local->chanctx_list, list) {
2937 num_different_channels++;
2938
2939 if (ctx->conf.radar_enabled)
2940 radar_detect |= BIT(ctx->conf.def.width);
2941 }
2942
2943 list_for_each_entry_rcu(sdata, &local->interfaces, list)
2944 num[sdata->wdev.iftype]++;
2945
2946 err = cfg80211_iter_combinations(local->hw.wiphy,
2947 num_different_channels, radar_detect,
2948 num, ieee80211_iter_max_chans,
2949 &max_num_different_channels);
2950 if (err < 0)
2951 return err;
2952
2953 return max_num_different_channels;
2954}