blob: 51a4a251623387c5c43c7d353ab295c7927ba922 [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 */
37void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080039struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020048
Ron Rindjunsky71364712007-12-25 17:00:36 +020049u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020050 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020051{
Harvey Harrisona494bb12008-06-11 14:21:58 -070052 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020053
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020054 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020056 return NULL;
57
Harvey Harrisona494bb12008-06-11 14:21:58 -070058 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020059 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070061
62 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020063 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070064 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020067 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070068
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020073 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020075 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070076 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if(ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020080 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070081
82 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020083 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020084 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020085 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020086 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020088 return hdr->addr1;
89 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070090 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020091 }
92 }
Johannes Bergc2d15602007-07-27 15:43:23 +020093 }
94
95 return NULL;
96}
97
Johannes Berg5cf121c2008-02-25 16:27:43 +010098void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +020099{
Johannes Berg252b86c2011-11-16 15:28:55 +0100100 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100101 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200102
Johannes Berg252b86c2011-11-16 15:28:55 +0100103 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
Johannes Berg252b86c2011-11-16 15:28:55 +0100106 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200107}
108
Michal Kazior4ee73f32012-04-11 08:47:56 +0200109int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
Johannes Bergc2d15602007-07-27 15:43:23 +0200110 int rate, int erp, int short_preamble)
111{
112 int dur;
113
114 /* calculate duration (in microseconds, rounded up to next higher
115 * integer if it includes a fractional microsecond) to send frame of
116 * len bytes (does not include FCS) at the given rate. Duration will
117 * also include SIFS.
118 *
119 * rate is in 100 kbps, so divident is multiplied by 10 in the
120 * DIV_ROUND_UP() operations.
121 */
122
Michal Kazior4ee73f32012-04-11 08:47:56 +0200123 if (band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200124 /*
125 * OFDM:
126 *
127 * N_DBPS = DATARATE x 4
128 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
129 * (16 = SIGNAL time, 6 = tail bits)
130 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
131 *
132 * T_SYM = 4 usec
133 * 802.11a - 17.5.2: aSIFSTime = 16 usec
134 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
135 * signal ext = 6 usec
136 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200137 dur = 16; /* SIFS + signal ext */
138 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
139 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
140 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
141 4 * rate); /* T_SYM x N_SYM */
142 } else {
143 /*
144 * 802.11b or 802.11g with 802.11b compatibility:
145 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
146 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
147 *
148 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
149 * aSIFSTime = 10 usec
150 * aPreambleLength = 144 usec or 72 usec with short preamble
151 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
152 */
153 dur = 10; /* aSIFSTime = 10 usec */
154 dur += short_preamble ? (72 + 24) : (144 + 48);
155
156 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
157 }
158
159 return dur;
160}
161
162/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100163__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
164 struct ieee80211_vif *vif,
Michal Kazior4ee73f32012-04-11 08:47:56 +0200165 enum ieee80211_band band,
Johannes Berg8318d782008-01-24 19:38:38 +0100166 size_t frame_len,
167 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200168{
Johannes Berg25d834e2008-09-12 22:52:47 +0200169 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200170 u16 dur;
171 int erp;
Johannes Berg25d834e2008-09-12 22:52:47 +0200172 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200173
Johannes Berg8318d782008-01-24 19:38:38 +0100174 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200175 if (vif) {
176 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200177 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200178 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
179 erp = rate->flags & IEEE80211_RATE_ERP_G;
180 }
Johannes Berg8318d782008-01-24 19:38:38 +0100181
Michal Kazior4ee73f32012-04-11 08:47:56 +0200182 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
Johannes Berg25d834e2008-09-12 22:52:47 +0200183 short_preamble);
Johannes Bergc2d15602007-07-27 15:43:23 +0200184
185 return cpu_to_le16(dur);
186}
187EXPORT_SYMBOL(ieee80211_generic_frame_duration);
188
Johannes Berg32bfd352007-12-19 01:31:26 +0100189__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
190 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200191 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200192{
193 struct ieee80211_local *local = hw_to_local(hw);
194 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200195 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100196 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200197 int erp;
198 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200199 struct ieee80211_supported_band *sband;
200
Michal Kazior4ee73f32012-04-11 08:47:56 +0200201 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200202
Johannes Berg25d834e2008-09-12 22:52:47 +0200203 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200204
Johannes Berge039fa42008-05-15 12:55:29 +0200205 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100206
207 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200208 if (vif) {
209 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200210 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200211 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
212 erp = rate->flags & IEEE80211_RATE_ERP_G;
213 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200214
215 /* CTS duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200216 dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200217 erp, short_preamble);
218 /* Data frame duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200219 dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200220 erp, short_preamble);
221 /* ACK duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200222 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200223 erp, short_preamble);
224
225 return cpu_to_le16(dur);
226}
227EXPORT_SYMBOL(ieee80211_rts_duration);
228
Johannes Berg32bfd352007-12-19 01:31:26 +0100229__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
230 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200231 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200232 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200233{
234 struct ieee80211_local *local = hw_to_local(hw);
235 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200236 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100237 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200238 int erp;
239 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200240 struct ieee80211_supported_band *sband;
241
Michal Kazior4ee73f32012-04-11 08:47:56 +0200242 sband = local->hw.wiphy->bands[frame_txctl->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200243
Johannes Berg25d834e2008-09-12 22:52:47 +0200244 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200245
Johannes Berge039fa42008-05-15 12:55:29 +0200246 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100247 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200248 if (vif) {
249 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200250 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200251 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
252 erp = rate->flags & IEEE80211_RATE_ERP_G;
253 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200254
255 /* Data frame duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200256 dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200257 erp, short_preamble);
Johannes Berge039fa42008-05-15 12:55:29 +0200258 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200259 /* ACK duration */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200260 dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200261 erp, short_preamble);
262 }
263
Johannes Bergc2d15602007-07-27 15:43:23 +0200264 return cpu_to_le16(dur);
265}
266EXPORT_SYMBOL(ieee80211_ctstoself_duration);
267
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200268void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
269{
270 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200271 int n_acs = IEEE80211_NUM_ACS;
272
273 if (local->hw.queues < IEEE80211_NUM_ACS)
274 n_acs = 1;
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200275
276 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
277 int ac;
278
Johannes Bergf142c6b2012-06-18 20:07:15 +0200279 if (!sdata->dev)
280 continue;
281
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200282 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
283 continue;
284
285 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
286 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
287 continue;
288
Johannes Berga6f38ac2012-07-04 12:49:59 +0200289 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200290 int ac_queue = sdata->vif.hw_queue[ac];
291
292 if (ac_queue == queue ||
293 (sdata->vif.cab_queue == queue &&
294 local->queue_stop_reasons[ac_queue] == 0 &&
295 skb_queue_empty(&local->pending[ac_queue])))
296 netif_wake_subqueue(sdata->dev, ac);
297 }
298 }
299}
300
Kalle Valoce7c9112008-12-18 23:35:20 +0200301static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
302 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200303{
304 struct ieee80211_local *local = hw_to_local(hw);
305
Johannes Bergb5878a22010-04-07 16:48:40 +0200306 trace_wake_queue(local, queue, reason);
307
Johannes Berge4e72fb2009-03-23 17:28:42 +0100308 if (WARN_ON(queue >= hw->queues))
309 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200310
Johannes Bergada15122012-03-28 11:04:27 +0200311 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
312 return;
313
Johannes Berg96f5e662009-02-12 00:51:53 +0100314 __clear_bit(reason, &local->queue_stop_reasons[queue]);
315
316 if (local->queue_stop_reasons[queue] != 0)
317 /* someone still has this queue stopped */
318 return;
319
Johannes Berg7236fe22010-03-22 13:42:43 -0700320 if (skb_queue_empty(&local->pending[queue])) {
321 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200322 ieee80211_propagate_queue_wake(local, queue);
Johannes Berg7236fe22010-03-22 13:42:43 -0700323 rcu_read_unlock();
324 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200325 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200326}
Kalle Valoce7c9112008-12-18 23:35:20 +0200327
Johannes Berg96f5e662009-02-12 00:51:53 +0100328void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
329 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200330{
331 struct ieee80211_local *local = hw_to_local(hw);
332 unsigned long flags;
333
334 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335 __ieee80211_wake_queue(hw, queue, reason);
336 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
337}
338
339void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
340{
341 ieee80211_wake_queue_by_reason(hw, queue,
342 IEEE80211_QUEUE_STOP_REASON_DRIVER);
343}
Johannes Bergc2d15602007-07-27 15:43:23 +0200344EXPORT_SYMBOL(ieee80211_wake_queue);
345
Kalle Valoce7c9112008-12-18 23:35:20 +0200346static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
347 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200348{
349 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100350 struct ieee80211_sub_if_data *sdata;
Johannes Berga6f38ac2012-07-04 12:49:59 +0200351 int n_acs = IEEE80211_NUM_ACS;
Johannes Bergc2d15602007-07-27 15:43:23 +0200352
Johannes Bergb5878a22010-04-07 16:48:40 +0200353 trace_stop_queue(local, queue, reason);
354
Johannes Berge4e72fb2009-03-23 17:28:42 +0100355 if (WARN_ON(queue >= hw->queues))
356 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100357
Johannes Bergada15122012-03-28 11:04:27 +0200358 if (test_bit(reason, &local->queue_stop_reasons[queue]))
359 return;
360
Johannes Berg2a577d92009-03-23 17:28:37 +0100361 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100362
Johannes Berga6f38ac2012-07-04 12:49:59 +0200363 if (local->hw.queues < IEEE80211_NUM_ACS)
364 n_acs = 1;
365
Johannes Bergcf0277e2010-01-05 18:00:58 +0100366 rcu_read_lock();
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200367 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
368 int ac;
369
Johannes Bergf142c6b2012-06-18 20:07:15 +0200370 if (!sdata->dev)
371 continue;
372
Johannes Berga6f38ac2012-07-04 12:49:59 +0200373 for (ac = 0; ac < n_acs; ac++) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200374 if (sdata->vif.hw_queue[ac] == queue ||
375 sdata->vif.cab_queue == queue)
376 netif_stop_subqueue(sdata->dev, ac);
377 }
378 }
Johannes Bergcf0277e2010-01-05 18:00:58 +0100379 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200380}
Kalle Valoce7c9112008-12-18 23:35:20 +0200381
Johannes Berg96f5e662009-02-12 00:51:53 +0100382void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
383 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200384{
385 struct ieee80211_local *local = hw_to_local(hw);
386 unsigned long flags;
387
388 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
389 __ieee80211_stop_queue(hw, queue, reason);
390 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
391}
392
393void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
394{
395 ieee80211_stop_queue_by_reason(hw, queue,
396 IEEE80211_QUEUE_STOP_REASON_DRIVER);
397}
Johannes Bergc2d15602007-07-27 15:43:23 +0200398EXPORT_SYMBOL(ieee80211_stop_queue);
399
Johannes Berg8f77f382009-06-07 21:58:37 +0200400void ieee80211_add_pending_skb(struct ieee80211_local *local,
401 struct sk_buff *skb)
402{
403 struct ieee80211_hw *hw = &local->hw;
404 unsigned long flags;
Johannes Berga7bc3762009-07-27 10:33:31 +0200405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200406 int queue = info->hw_queue;
Johannes Berga7bc3762009-07-27 10:33:31 +0200407
408 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200409 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200410 return;
411 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200412
413 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
414 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200415 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200416 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
417 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418}
419
Johannes Bergb0b97a82011-09-29 16:04:30 +0200420void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
421 struct sk_buff_head *skbs,
422 void (*fn)(void *data), void *data)
Johannes Berg8f77f382009-06-07 21:58:37 +0200423{
424 struct ieee80211_hw *hw = &local->hw;
425 struct sk_buff *skb;
426 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200427 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200428
429 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200430 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200431 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
432
433 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200434 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200435 continue;
436 }
437
Johannes Berg3a25a8c2012-04-03 16:28:50 +0200438 queue = info->hw_queue;
Johannes Berg4644ae82012-03-28 11:04:28 +0200439
440 __ieee80211_stop_queue(hw, queue,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
442
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200443 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200444 }
445
Johannes Berg50a94322010-11-16 11:50:28 -0800446 if (fn)
447 fn(data);
448
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200449 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200450 __ieee80211_wake_queue(hw, i,
451 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg8f77f382009-06-07 21:58:37 +0200452 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200453}
454
Kalle Valoce7c9112008-12-18 23:35:20 +0200455void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
456 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200457{
Kalle Valoce7c9112008-12-18 23:35:20 +0200458 struct ieee80211_local *local = hw_to_local(hw);
459 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200460 int i;
461
Kalle Valoce7c9112008-12-18 23:35:20 +0200462 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
463
Johannes Berg96f5e662009-02-12 00:51:53 +0100464 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200465 __ieee80211_stop_queue(hw, i, reason);
466
467 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
468}
469
470void ieee80211_stop_queues(struct ieee80211_hw *hw)
471{
472 ieee80211_stop_queues_by_reason(hw,
473 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200474}
475EXPORT_SYMBOL(ieee80211_stop_queues);
476
Tomas Winkler92ab8532008-07-24 21:02:04 +0300477int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
478{
479 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200480 unsigned long flags;
481 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100482
Johannes Berge4e72fb2009-03-23 17:28:42 +0100483 if (WARN_ON(queue >= hw->queues))
484 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100485
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 ret = !!local->queue_stop_reasons[queue];
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
489 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300490}
491EXPORT_SYMBOL(ieee80211_queue_stopped);
492
Kalle Valoce7c9112008-12-18 23:35:20 +0200493void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
494 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200495{
Kalle Valoce7c9112008-12-18 23:35:20 +0200496 struct ieee80211_local *local = hw_to_local(hw);
497 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200498 int i;
499
Kalle Valoce7c9112008-12-18 23:35:20 +0200500 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
501
Johannes Berge4e72fb2009-03-23 17:28:42 +0100502 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200503 __ieee80211_wake_queue(hw, i, reason);
504
505 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
506}
507
508void ieee80211_wake_queues(struct ieee80211_hw *hw)
509{
510 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200511}
512EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100513
Johannes Berg32bfd352007-12-19 01:31:26 +0100514void ieee80211_iterate_active_interfaces(
515 struct ieee80211_hw *hw,
516 void (*iterator)(void *data, u8 *mac,
517 struct ieee80211_vif *vif),
518 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100519{
520 struct ieee80211_local *local = hw_to_local(hw);
521 struct ieee80211_sub_if_data *sdata;
522
Johannes Bergc771c9d2009-01-23 22:54:03 +0100523 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200524
525 list_for_each_entry(sdata, &local->interfaces, list) {
526 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200527 case NL80211_IFTYPE_MONITOR:
528 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200529 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200530 default:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200531 break;
532 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100533 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100534 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200535 &sdata->vif);
536 }
537
Johannes Berg685fb722012-07-11 16:38:09 +0200538 sdata = rcu_dereference_protected(local->monitor_sdata,
539 lockdep_is_held(&local->iflist_mtx));
540 if (sdata)
541 iterator(data, sdata->vif.addr, &sdata->vif);
542
Johannes Bergc771c9d2009-01-23 22:54:03 +0100543 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200544}
545EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
546
547void ieee80211_iterate_active_interfaces_atomic(
548 struct ieee80211_hw *hw,
549 void (*iterator)(void *data, u8 *mac,
550 struct ieee80211_vif *vif),
551 void *data)
552{
553 struct ieee80211_local *local = hw_to_local(hw);
554 struct ieee80211_sub_if_data *sdata;
555
Johannes Berge38bad42007-11-28 10:55:32 +0100556 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100557
Johannes Berge38bad42007-11-28 10:55:32 +0100558 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100559 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200560 case NL80211_IFTYPE_MONITOR:
561 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100562 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200563 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100564 break;
565 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100566 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100567 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100568 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100569 }
Johannes Berge38bad42007-11-28 10:55:32 +0100570
Johannes Berg685fb722012-07-11 16:38:09 +0200571 sdata = rcu_dereference(local->monitor_sdata);
572 if (sdata)
573 iterator(data, sdata->vif.addr, &sdata->vif);
574
Johannes Berge38bad42007-11-28 10:55:32 +0100575 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100576}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200577EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200578
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400579/*
580 * Nothing should have been stuffed into the workqueue during
581 * the suspend->resume cycle. If this WARN is seen then there
582 * is a bug with either the driver suspend or something in
583 * mac80211 stuffing into the workqueue which we haven't yet
584 * cleared during mac80211's suspend cycle.
585 */
586static bool ieee80211_can_queue_work(struct ieee80211_local *local)
587{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100588 if (WARN(local->suspended && !local->resuming,
589 "queueing ieee80211 work while going to suspend\n"))
590 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400591
592 return true;
593}
594
595void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
596{
597 struct ieee80211_local *local = hw_to_local(hw);
598
599 if (!ieee80211_can_queue_work(local))
600 return;
601
602 queue_work(local->workqueue, work);
603}
604EXPORT_SYMBOL(ieee80211_queue_work);
605
606void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
607 struct delayed_work *dwork,
608 unsigned long delay)
609{
610 struct ieee80211_local *local = hw_to_local(hw);
611
612 if (!ieee80211_can_queue_work(local))
613 return;
614
615 queue_delayed_work(local->workqueue, dwork, delay);
616}
617EXPORT_SYMBOL(ieee80211_queue_delayed_work);
618
Johannes Bergdd769862011-11-18 16:54:50 +0100619u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
620 struct ieee802_11_elems *elems,
621 u64 filter, u32 crc)
622{
623 size_t left = len;
624 u8 *pos = start;
625 bool calc_crc = filter != 0;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800626 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100627
Paul Stewartfcff4f12012-02-23 17:59:53 -0800628 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100629 memset(elems, 0, sizeof(*elems));
630 elems->ie_start = start;
631 elems->total_len = len;
632
633 while (left >= 2) {
634 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800635 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100636
637 id = *pos++;
638 elen = *pos++;
639 left -= 2;
640
Paul Stewartfcff4f12012-02-23 17:59:53 -0800641 if (elen > left) {
642 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100643 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800644 }
645
646 if (id != WLAN_EID_VENDOR_SPECIFIC &&
647 id != WLAN_EID_QUIET &&
648 test_bit(id, seen_elems)) {
649 elems->parse_error = true;
650 left -= elen;
651 pos += elen;
652 continue;
653 }
Johannes Bergdd769862011-11-18 16:54:50 +0100654
655 if (calc_crc && id < 64 && (filter & (1ULL << id)))
656 crc = crc32_be(crc, pos - 2, elen + 2);
657
Paul Stewartfcff4f12012-02-23 17:59:53 -0800658 elem_parse_failed = false;
659
Johannes Bergdd769862011-11-18 16:54:50 +0100660 switch (id) {
661 case WLAN_EID_SSID:
662 elems->ssid = pos;
663 elems->ssid_len = elen;
664 break;
665 case WLAN_EID_SUPP_RATES:
666 elems->supp_rates = pos;
667 elems->supp_rates_len = elen;
668 break;
669 case WLAN_EID_FH_PARAMS:
670 elems->fh_params = pos;
671 elems->fh_params_len = elen;
672 break;
673 case WLAN_EID_DS_PARAMS:
674 elems->ds_params = pos;
675 elems->ds_params_len = elen;
676 break;
677 case WLAN_EID_CF_PARAMS:
678 elems->cf_params = pos;
679 elems->cf_params_len = elen;
680 break;
681 case WLAN_EID_TIM:
682 if (elen >= sizeof(struct ieee80211_tim_ie)) {
683 elems->tim = (void *)pos;
684 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800685 } else
686 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100687 break;
688 case WLAN_EID_IBSS_PARAMS:
689 elems->ibss_params = pos;
690 elems->ibss_params_len = elen;
691 break;
692 case WLAN_EID_CHALLENGE:
693 elems->challenge = pos;
694 elems->challenge_len = elen;
695 break;
696 case WLAN_EID_VENDOR_SPECIFIC:
697 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
698 pos[2] == 0xf2) {
699 /* Microsoft OUI (00:50:F2) */
700
701 if (calc_crc)
702 crc = crc32_be(crc, pos - 2, elen + 2);
703
704 if (pos[3] == 1) {
705 /* OUI Type 1 - WPA IE */
706 elems->wpa = pos;
707 elems->wpa_len = elen;
708 } else if (elen >= 5 && pos[3] == 2) {
709 /* OUI Type 2 - WMM IE */
710 if (pos[4] == 0) {
711 elems->wmm_info = pos;
712 elems->wmm_info_len = elen;
713 } else if (pos[4] == 1) {
714 elems->wmm_param = pos;
715 elems->wmm_param_len = elen;
716 }
717 }
718 }
719 break;
720 case WLAN_EID_RSN:
721 elems->rsn = pos;
722 elems->rsn_len = elen;
723 break;
724 case WLAN_EID_ERP_INFO:
725 elems->erp_info = pos;
726 elems->erp_info_len = elen;
727 break;
728 case WLAN_EID_EXT_SUPP_RATES:
729 elems->ext_supp_rates = pos;
730 elems->ext_supp_rates_len = elen;
731 break;
732 case WLAN_EID_HT_CAPABILITY:
733 if (elen >= sizeof(struct ieee80211_ht_cap))
734 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800735 else
736 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100737 break;
Johannes Berg074d46d2012-03-15 19:45:16 +0100738 case WLAN_EID_HT_OPERATION:
739 if (elen >= sizeof(struct ieee80211_ht_operation))
740 elems->ht_operation = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800741 else
742 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100743 break;
Mahesh Palivela818255e2012-10-10 11:33:04 +0000744 case WLAN_EID_VHT_CAPABILITY:
745 if (elen >= sizeof(struct ieee80211_vht_cap))
746 elems->vht_cap_elem = (void *)pos;
747 else
748 elem_parse_failed = true;
749 break;
750 case WLAN_EID_VHT_OPERATION:
751 if (elen >= sizeof(struct ieee80211_vht_operation))
752 elems->vht_operation = (void *)pos;
753 else
754 elem_parse_failed = true;
755 break;
Johannes Bergdd769862011-11-18 16:54:50 +0100756 case WLAN_EID_MESH_ID:
757 elems->mesh_id = pos;
758 elems->mesh_id_len = elen;
759 break;
760 case WLAN_EID_MESH_CONFIG:
761 if (elen >= sizeof(struct ieee80211_meshconf_ie))
762 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800763 else
764 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100765 break;
766 case WLAN_EID_PEER_MGMT:
767 elems->peering = pos;
768 elems->peering_len = elen;
769 break;
770 case WLAN_EID_PREQ:
771 elems->preq = pos;
772 elems->preq_len = elen;
773 break;
774 case WLAN_EID_PREP:
775 elems->prep = pos;
776 elems->prep_len = elen;
777 break;
778 case WLAN_EID_PERR:
779 elems->perr = pos;
780 elems->perr_len = elen;
781 break;
782 case WLAN_EID_RANN:
783 if (elen >= sizeof(struct ieee80211_rann_ie))
784 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800785 else
786 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100787 break;
788 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200789 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
790 elem_parse_failed = true;
791 break;
792 }
793 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100794 break;
795 case WLAN_EID_QUIET:
796 if (!elems->quiet_elem) {
797 elems->quiet_elem = pos;
798 elems->quiet_elem_len = elen;
799 }
800 elems->num_of_quiet_elem++;
801 break;
802 case WLAN_EID_COUNTRY:
803 elems->country_elem = pos;
804 elems->country_elem_len = elen;
805 break;
806 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +0200807 if (elen != 1) {
808 elem_parse_failed = true;
809 break;
810 }
Johannes Bergdd769862011-11-18 16:54:50 +0100811 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100812 break;
813 case WLAN_EID_TIMEOUT_INTERVAL:
814 elems->timeout_int = pos;
815 elems->timeout_int_len = elen;
816 break;
817 default:
818 break;
819 }
820
Paul Stewartfcff4f12012-02-23 17:59:53 -0800821 if (elem_parse_failed)
822 elems->parse_error = true;
823 else
824 set_bit(id, seen_elems);
825
Johannes Bergdd769862011-11-18 16:54:50 +0100826 left -= elen;
827 pos += elen;
828 }
829
Paul Stewartfcff4f12012-02-23 17:59:53 -0800830 if (left != 0)
831 elems->parse_error = true;
832
Johannes Bergdd769862011-11-18 16:54:50 +0100833 return crc;
834}
835
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200836void ieee802_11_parse_elems(u8 *start, size_t len,
837 struct ieee802_11_elems *elems)
838{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200839 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
840}
841
Johannes Berg3abead52012-03-02 15:56:59 +0100842void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
843 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200844{
845 struct ieee80211_local *local = sdata->local;
846 struct ieee80211_tx_queue_params qparam;
Johannes Berg55de9082012-07-26 17:24:39 +0200847 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg54bcbc62012-03-28 11:04:25 +0200848 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200849 bool use_11b, enable_qos;
Johannes Bergaa837e12009-05-07 16:16:24 +0200850 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200851
852 if (!local->ops->conf_tx)
853 return;
854
Johannes Berg54bcbc62012-03-28 11:04:25 +0200855 if (local->hw.queues < IEEE80211_NUM_ACS)
856 return;
857
Johannes Berg5825fe102008-09-09 12:56:01 +0200858 memset(&qparam, 0, sizeof(qparam));
859
Johannes Berg55de9082012-07-26 17:24:39 +0200860 rcu_read_lock();
861 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
862 use_11b = (chanctx_conf &&
863 chanctx_conf->channel->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +0200864 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg55de9082012-07-26 17:24:39 +0200865 rcu_read_unlock();
Johannes Berg5825fe102008-09-09 12:56:01 +0200866
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200867 /*
868 * By default disable QoS in STA mode for old access points, which do
869 * not support 802.11e. New APs will provide proper queue parameters,
870 * that we will configure later.
871 */
872 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
873
Johannes Berg54bcbc62012-03-28 11:04:25 +0200874 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
Johannes Bergaa837e12009-05-07 16:16:24 +0200875 /* Set defaults according to 802.11-2007 Table 7-37 */
876 aCWmax = 1023;
877 if (use_11b)
878 aCWmin = 31;
879 else
880 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200881
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200882 if (enable_qos) {
883 switch (ac) {
884 case IEEE80211_AC_BK:
885 qparam.cw_max = aCWmax;
886 qparam.cw_min = aCWmin;
887 qparam.txop = 0;
888 qparam.aifs = 7;
889 break;
890 /* never happens but let's not leave undefined */
891 default:
892 case IEEE80211_AC_BE:
893 qparam.cw_max = aCWmax;
894 qparam.cw_min = aCWmin;
895 qparam.txop = 0;
896 qparam.aifs = 3;
897 break;
898 case IEEE80211_AC_VI:
899 qparam.cw_max = aCWmin;
900 qparam.cw_min = (aCWmin + 1) / 2 - 1;
901 if (use_11b)
902 qparam.txop = 6016/32;
903 else
904 qparam.txop = 3008/32;
905 qparam.aifs = 2;
906 break;
907 case IEEE80211_AC_VO:
908 qparam.cw_max = (aCWmin + 1) / 2 - 1;
909 qparam.cw_min = (aCWmin + 1) / 4 - 1;
910 if (use_11b)
911 qparam.txop = 3264/32;
912 else
913 qparam.txop = 1504/32;
914 qparam.aifs = 2;
915 break;
916 }
917 } else {
918 /* Confiure old 802.11b/g medium access rules. */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200919 qparam.cw_max = aCWmax;
920 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200921 qparam.txop = 0;
Johannes Bergaa837e12009-05-07 16:16:24 +0200922 qparam.aifs = 2;
Johannes Bergaa837e12009-05-07 16:16:24 +0200923 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200924
Kalle Valoab133152010-01-12 10:42:31 +0200925 qparam.uapsd = false;
926
Johannes Berg54bcbc62012-03-28 11:04:25 +0200927 sdata->tx_conf[ac] = qparam;
928 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +0200929 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200930
Johannes Bergf142c6b2012-06-18 20:07:15 +0200931 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
932 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200933 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +0100934 if (bss_notify)
935 ieee80211_bss_info_change_notify(sdata,
936 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +0530937 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200938}
Johannes Berge50db652008-09-09 15:07:09 +0200939
Johannes Berg46900292009-02-15 12:44:28 +0100940void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
941 const size_t supp_rates_len,
942 const u8 *supp_rates)
943{
Johannes Berg55de9082012-07-26 17:24:39 +0200944 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berg46900292009-02-15 12:44:28 +0100945 int i, have_higher_than_11mbit = 0;
946
947 /* cf. IEEE 802.11 9.2.12 */
948 for (i = 0; i < supp_rates_len; i++)
949 if ((supp_rates[i] & 0x7f) * 5 > 110)
950 have_higher_than_11mbit = 1;
951
Johannes Berg55de9082012-07-26 17:24:39 +0200952 rcu_read_lock();
953 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
954
955 if (chanctx_conf &&
956 chanctx_conf->channel->band == IEEE80211_BAND_2GHZ &&
Johannes Berg46900292009-02-15 12:44:28 +0100957 have_higher_than_11mbit)
958 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
959 else
960 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
Johannes Berg55de9082012-07-26 17:24:39 +0200961 rcu_read_unlock();
Johannes Berg46900292009-02-15 12:44:28 +0100962
Johannes Berg3abead52012-03-02 15:56:59 +0100963 ieee80211_set_wmm_default(sdata, true);
Johannes Berg46900292009-02-15 12:44:28 +0100964}
965
Johannes Berg881d9482009-01-21 15:13:48 +0100966u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200967 enum ieee80211_band band)
968{
969 struct ieee80211_supported_band *sband;
970 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100971 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200972 enum ieee80211_rate_flags mandatory_flag;
973 int i;
974
975 sband = local->hw.wiphy->bands[band];
Michal Kazior4ee73f32012-04-11 08:47:56 +0200976 if (WARN_ON(!sband))
977 return 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200978
979 if (band == IEEE80211_BAND_2GHZ)
980 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
981 else
982 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
983
984 bitrates = sband->bitrates;
985 mandatory_rates = 0;
986 for (i = 0; i < sband->n_bitrates; i++)
987 if (bitrates[i].flags & mandatory_flag)
988 mandatory_rates |= BIT(i);
989 return mandatory_rates;
990}
Johannes Berg46900292009-02-15 12:44:28 +0100991
992void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
Jouni Malinen700e8ea2012-09-30 19:29:37 +0300993 u16 transaction, u16 auth_alg, u16 status,
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100994 u8 *extra, size_t extra_len, const u8 *da,
995 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100996{
997 struct ieee80211_local *local = sdata->local;
998 struct sk_buff *skb;
999 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +02001000 int err;
Johannes Berg46900292009-02-15 12:44:28 +01001001
1002 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +02001003 sizeof(*mgmt) + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -07001004 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +01001005 return;
Joe Perchesd15b8452011-08-29 14:17:31 -07001006
Johannes Berg46900292009-02-15 12:44:28 +01001007 skb_reserve(skb, local->hw.extra_tx_headroom);
1008
1009 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1010 memset(mgmt, 0, 24 + 6);
1011 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1012 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +01001013 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001014 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001015 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1016 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1017 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
Jouni Malinen700e8ea2012-09-30 19:29:37 +03001018 mgmt->u.auth.status_code = cpu_to_le16(status);
Johannes Berg46900292009-02-15 12:44:28 +01001019 if (extra)
1020 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +01001021
Johannes Bergfffd0932009-07-08 14:22:54 +02001022 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1023 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1024 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1025 WARN_ON(err);
1026 }
1027
Johannes Berg62ae67b2009-11-18 18:42:05 +01001028 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1029 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001030}
1031
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001032void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1033 const u8 *bssid, u16 stype, u16 reason,
1034 bool send_frame, u8 *frame_buf)
1035{
1036 struct ieee80211_local *local = sdata->local;
1037 struct sk_buff *skb;
1038 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1039
1040 /* build frame */
1041 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1042 mgmt->duration = 0; /* initialize only */
1043 mgmt->seq_ctrl = 0; /* initialize only */
1044 memcpy(mgmt->da, bssid, ETH_ALEN);
1045 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1046 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1047 /* u.deauth.reason_code == u.disassoc.reason_code */
1048 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1049
1050 if (send_frame) {
1051 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1052 IEEE80211_DEAUTH_FRAME_LEN);
1053 if (!skb)
1054 return;
1055
1056 skb_reserve(skb, local->hw.extra_tx_headroom);
1057
1058 /* copy in frame */
1059 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1060 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1061
1062 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1063 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1064 IEEE80211_SKB_CB(skb)->flags |=
1065 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1066
1067 ieee80211_tx_skb(sdata, skb);
1068 }
1069}
1070
Johannes Bergde95a542009-04-01 11:58:36 +02001071int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec582009-10-27 20:59:55 +01001072 const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +03001073 enum ieee80211_band band, u32 rate_mask,
1074 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +02001075{
1076 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001077 u8 *pos;
1078 size_t offset = 0, noffset;
1079 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001080 u8 rates[32];
1081 int num_rates;
1082 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001083
Johannes Berg4d36ec582009-10-27 20:59:55 +01001084 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001085 if (WARN_ON_ONCE(!sband))
1086 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001087
1088 pos = buffer;
1089
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001090 num_rates = 0;
1091 for (i = 0; i < sband->n_bitrates; i++) {
1092 if ((BIT(i) & rate_mask) == 0)
1093 continue; /* skip rate */
1094 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1095 }
1096
1097 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001098
Johannes Bergde95a542009-04-01 11:58:36 +02001099 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001100 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001101 memcpy(pos, rates, supp_rates_len);
1102 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001103
Johannes Berg8e664fb2009-12-23 13:15:38 +01001104 /* insert "request information" if in custom IEs */
1105 if (ie && ie_len) {
1106 static const u8 before_extrates[] = {
1107 WLAN_EID_SSID,
1108 WLAN_EID_SUPP_RATES,
1109 WLAN_EID_REQUEST,
1110 };
1111 noffset = ieee80211_ie_split(ie, ie_len,
1112 before_extrates,
1113 ARRAY_SIZE(before_extrates),
1114 offset);
1115 memcpy(pos, ie + offset, noffset - offset);
1116 pos += noffset - offset;
1117 offset = noffset;
1118 }
Johannes Bergde95a542009-04-01 11:58:36 +02001119
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001120 ext_rates_len = num_rates - supp_rates_len;
1121 if (ext_rates_len > 0) {
Johannes Berg8e664fb2009-12-23 13:15:38 +01001122 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001123 *pos++ = ext_rates_len;
1124 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1125 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001126 }
1127
Jouni Malinen651b5222010-08-28 19:37:51 +03001128 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1129 *pos++ = WLAN_EID_DS_PARAMS;
1130 *pos++ = 1;
1131 *pos++ = channel;
1132 }
1133
Johannes Berg8e664fb2009-12-23 13:15:38 +01001134 /* insert custom IEs that go before HT */
1135 if (ie && ie_len) {
1136 static const u8 before_ht[] = {
1137 WLAN_EID_SSID,
1138 WLAN_EID_SUPP_RATES,
1139 WLAN_EID_REQUEST,
1140 WLAN_EID_EXT_SUPP_RATES,
1141 WLAN_EID_DS_PARAMS,
1142 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1143 };
1144 noffset = ieee80211_ie_split(ie, ie_len,
1145 before_ht, ARRAY_SIZE(before_ht),
1146 offset);
1147 memcpy(pos, ie + offset, noffset - offset);
1148 pos += noffset - offset;
1149 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001150 }
1151
Alexander Simon42e7aa72011-10-26 14:47:26 -07001152 if (sband->ht_cap.ht_supported)
Ben Greearef96a8422011-11-18 11:32:00 -08001153 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1154 sband->ht_cap.cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +02001155
Johannes Bergde95a542009-04-01 11:58:36 +02001156 /*
1157 * If adding more here, adjust code in main.c
1158 * that calculates local->scan_ies_len.
1159 */
1160
Johannes Berg8e664fb2009-12-23 13:15:38 +01001161 /* add any remaining custom IEs */
1162 if (ie && ie_len) {
1163 noffset = ie_len;
1164 memcpy(pos, ie + offset, noffset - offset);
1165 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001166 }
1167
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001168 if (sband->vht_cap.vht_supported)
1169 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1170 sband->vht_cap.cap);
1171
Johannes Bergde95a542009-04-01 11:58:36 +02001172 return pos - buffer;
1173}
1174
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001175struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001176 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001177 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001178 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001179 const u8 *ie, size_t ie_len,
1180 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001181{
1182 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001183 struct sk_buff *skb;
1184 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001185 size_t buf_len;
1186 u8 *buf;
Johannes Berg6b778632012-07-23 14:53:27 +02001187 u8 chan_no;
Johannes Berg46900292009-02-15 12:44:28 +01001188
Kalle Valo7c12ce82010-01-05 20:16:44 +02001189 /* FIXME: come up with a proper value */
1190 buf = kmalloc(200 + ie_len, GFP_KERNEL);
Joe Perchesd15b8452011-08-29 14:17:31 -07001191 if (!buf)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001192 return NULL;
Johannes Berg46900292009-02-15 12:44:28 +01001193
Paul Stewarta806c552011-06-23 09:00:11 -08001194 /*
1195 * Do not send DS Channel parameter for directed probe requests
1196 * in order to maximize the chance that we get a response. Some
1197 * badly-behaved APs don't respond when this parameter is included.
1198 */
1199 if (directed)
Johannes Berg6b778632012-07-23 14:53:27 +02001200 chan_no = 0;
Paul Stewarta806c552011-06-23 09:00:11 -08001201 else
Johannes Berg6b778632012-07-23 14:53:27 +02001202 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001203
Johannes Berg6b778632012-07-23 14:53:27 +02001204 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band,
1205 ratemask, chan_no);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001206
1207 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1208 ssid, ssid_len,
1209 buf, buf_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001210 if (!skb)
1211 goto out;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001212
Johannes Berg46900292009-02-15 12:44:28 +01001213 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001214 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001215 memcpy(mgmt->da, dst, ETH_ALEN);
1216 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001217 }
Johannes Berg46900292009-02-15 12:44:28 +01001218
Johannes Berg62ae67b2009-11-18 18:42:05 +01001219 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001220
1221 out:
Ming Lei145b6d12010-01-15 21:44:21 +08001222 kfree(buf);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001223
1224 return skb;
1225}
1226
1227void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1228 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001229 const u8 *ie, size_t ie_len,
Johannes Bergfe94fe02012-07-30 12:26:34 +02001230 u32 ratemask, bool directed, bool no_cck,
Johannes Berg55de9082012-07-26 17:24:39 +02001231 struct ieee80211_channel *channel, bool scan)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001232{
1233 struct sk_buff *skb;
1234
Johannes Bergfe94fe02012-07-30 12:26:34 +02001235 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001236 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001237 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301238 if (skb) {
1239 if (no_cck)
1240 IEEE80211_SKB_CB(skb)->flags |=
1241 IEEE80211_TX_CTL_NO_CCK_RATE;
Johannes Berg55de9082012-07-26 17:24:39 +02001242 if (scan)
1243 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1244 else
1245 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301246 }
Johannes Berg46900292009-02-15 12:44:28 +01001247}
1248
1249u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1250 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001251 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001252{
1253 struct ieee80211_supported_band *sband;
1254 struct ieee80211_rate *bitrates;
1255 size_t num_rates;
1256 u32 supp_rates;
1257 int i, j;
1258 sband = local->hw.wiphy->bands[band];
1259
Michal Kazior4ee73f32012-04-11 08:47:56 +02001260 if (WARN_ON(!sband))
1261 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001262
1263 bitrates = sband->bitrates;
1264 num_rates = sband->n_bitrates;
1265 supp_rates = 0;
1266 for (i = 0; i < elems->supp_rates_len +
1267 elems->ext_supp_rates_len; i++) {
1268 u8 rate = 0;
1269 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001270 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001271 if (i < elems->supp_rates_len)
1272 rate = elems->supp_rates[i];
1273 else if (elems->ext_supp_rates)
1274 rate = elems->ext_supp_rates
1275 [i - elems->supp_rates_len];
1276 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001277 is_basic = !!(rate & 0x80);
1278
1279 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1280 continue;
1281
1282 for (j = 0; j < num_rates; j++) {
1283 if (bitrates[j].bitrate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001284 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001285 if (basic_rates && is_basic)
1286 *basic_rates |= BIT(j);
1287 }
1288 }
Johannes Berg46900292009-02-15 12:44:28 +01001289 }
1290 return supp_rates;
1291}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001292
Johannes Berg84f6a012009-08-20 20:02:20 +02001293void ieee80211_stop_device(struct ieee80211_local *local)
1294{
1295 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001296 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001297
1298 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001299
1300 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001301 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001302}
1303
Johannes Bergf2753dd2009-04-14 10:09:24 +02001304int ieee80211_reconfig(struct ieee80211_local *local)
1305{
1306 struct ieee80211_hw *hw = &local->hw;
1307 struct ieee80211_sub_if_data *sdata;
Johannes Berg55de9082012-07-26 17:24:39 +02001308 struct ieee80211_chanctx *ctx;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001309 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001310 int res, i;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001311
Johannes Bergeecc4802011-05-04 15:37:29 +02001312#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001313 if (local->suspended)
1314 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001315
Johannes Bergeecc4802011-05-04 15:37:29 +02001316 if (local->wowlan) {
1317 local->wowlan = false;
1318 res = drv_resume(local);
1319 if (res < 0) {
1320 local->resuming = false;
1321 return res;
1322 }
1323 if (res == 0)
1324 goto wake_up;
1325 WARN_ON(res > 1);
1326 /*
1327 * res is 1, which means the driver requested
1328 * to go through a regular reset on wakeup.
1329 */
1330 }
1331#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001332 /* everything else happens only if HW was up & running */
1333 if (!local->open_count)
1334 goto wake_up;
1335
1336 /*
1337 * Upon resume hardware can sometimes be goofy due to
1338 * various platform / driver / bus issues, so restarting
1339 * the device may at times not work immediately. Propagate
1340 * the error.
1341 */
1342 res = drv_start(local);
1343 if (res) {
1344 WARN(local->suspended, "Hardware became unavailable "
1345 "upon resume. This could be a software issue "
1346 "prior to suspend or a hardware issue.\n");
1347 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001348 }
1349
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301350 /* setup fragmentation threshold */
1351 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1352
1353 /* setup RTS threshold */
1354 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1355
1356 /* reset coverage class */
1357 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1358
Johannes Berg94f9b972011-07-14 16:48:54 +02001359 ieee80211_led_radio(local, true);
1360 ieee80211_mod_tpt_led_trig(local,
1361 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1362
Johannes Bergf2753dd2009-04-14 10:09:24 +02001363 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001364 sdata = rtnl_dereference(local->monitor_sdata);
1365 if (sdata) {
1366 res = drv_add_interface(local, sdata);
1367 if (WARN_ON(res)) {
1368 rcu_assign_pointer(local->monitor_sdata, NULL);
1369 synchronize_net();
1370 kfree(sdata);
1371 }
1372 }
1373
Johannes Bergf2753dd2009-04-14 10:09:24 +02001374 list_for_each_entry(sdata, &local->interfaces, list) {
1375 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1376 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001377 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001378 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001379 }
1380
Johannes Berg55de9082012-07-26 17:24:39 +02001381 /* add channel contexts */
1382 mutex_lock(&local->chanctx_mtx);
1383 list_for_each_entry(ctx, &local->chanctx_list, list)
1384 WARN_ON(drv_add_chanctx(local, ctx));
1385 mutex_unlock(&local->chanctx_mtx);
1386
Johannes Bergf2753dd2009-04-14 10:09:24 +02001387 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001388 mutex_lock(&local->sta_mtx);
1389 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001390 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001391
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001392 if (!sta->uploaded)
1393 continue;
1394
1395 /* AP-mode stations will be added later */
1396 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1397 continue;
1398
1399 for (state = IEEE80211_STA_NOTEXIST;
1400 state < sta->sta_state; state++)
1401 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1402 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001403 }
Johannes Berg34e89502010-02-03 13:59:58 +01001404 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001405
Eliad Peller2683d652011-07-14 20:29:42 +03001406 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001407 if (hw->queues >= IEEE80211_NUM_ACS) {
1408 list_for_each_entry(sdata, &local->interfaces, list) {
1409 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1410 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1411 !ieee80211_sdata_running(sdata))
1412 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001413
Johannes Berg54bcbc62012-03-28 11:04:25 +02001414 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1415 drv_conf_tx(local, sdata, i,
1416 &sdata->tx_conf[i]);
1417 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001418 }
Eliad Peller2683d652011-07-14 20:29:42 +03001419
Johannes Bergf2753dd2009-04-14 10:09:24 +02001420 /* reconfigure hardware */
1421 ieee80211_hw_config(local, ~0);
1422
Johannes Bergf2753dd2009-04-14 10:09:24 +02001423 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001424
1425 /* Finally also reconfigure all the BSS information */
1426 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg55de9082012-07-26 17:24:39 +02001427 struct ieee80211_chanctx_conf *ctx_conf;
Johannes Bergac8dd502010-05-05 09:44:02 +02001428 u32 changed;
1429
Johannes Berg9607e6b2009-12-23 13:15:31 +01001430 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001431 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001432
Johannes Berg55de9082012-07-26 17:24:39 +02001433 mutex_lock(&local->chanctx_mtx);
1434 ctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1435 lockdep_is_held(&local->chanctx_mtx));
1436 if (ctx_conf) {
1437 ctx = container_of(ctx_conf, struct ieee80211_chanctx,
1438 conf);
1439 drv_assign_vif_chanctx(local, sdata, ctx);
1440 }
1441 mutex_unlock(&local->chanctx_mtx);
1442
Johannes Bergac8dd502010-05-05 09:44:02 +02001443 /* common change flags for all interface types */
1444 changed = BSS_CHANGED_ERP_CTS_PROT |
1445 BSS_CHANGED_ERP_PREAMBLE |
1446 BSS_CHANGED_ERP_SLOT |
1447 BSS_CHANGED_HT |
1448 BSS_CHANGED_BASIC_RATES |
1449 BSS_CHANGED_BEACON_INT |
1450 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001451 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001452 BSS_CHANGED_QOS |
1453 BSS_CHANGED_IDLE;
Johannes Bergac8dd502010-05-05 09:44:02 +02001454
Johannes Bergf2753dd2009-04-14 10:09:24 +02001455 switch (sdata->vif.type) {
1456 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001457 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001458 BSS_CHANGED_ARP_FILTER |
1459 BSS_CHANGED_PS;
Eliad Pellera7b545f2011-02-08 18:43:19 +02001460 mutex_lock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001461 ieee80211_bss_info_change_notify(sdata, changed);
Eliad Pellera7b545f2011-02-08 18:43:19 +02001462 mutex_unlock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001463 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001464 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001465 changed |= BSS_CHANGED_IBSS;
1466 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001467 case NL80211_IFTYPE_AP:
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001468 changed |= BSS_CHANGED_SSID;
1469
1470 if (sdata->vif.type == NL80211_IFTYPE_AP)
1471 changed |= BSS_CHANGED_AP_PROBE_RESP;
1472
Arik Nemtsov78274932011-09-04 11:11:32 +03001473 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001474 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001475 changed |= BSS_CHANGED_BEACON |
1476 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001477 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001478 break;
1479 case NL80211_IFTYPE_WDS:
1480 break;
1481 case NL80211_IFTYPE_AP_VLAN:
1482 case NL80211_IFTYPE_MONITOR:
1483 /* ignore virtual */
1484 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001485 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf142c6b2012-06-18 20:07:15 +02001486 changed = BSS_CHANGED_IDLE;
1487 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001488 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001489 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001490 case NL80211_IFTYPE_P2P_CLIENT:
1491 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001492 WARN_ON(1);
1493 break;
1494 }
1495 }
1496
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001497 ieee80211_recalc_ps(local, -1);
1498
Johannes Berg2a419052010-06-10 10:21:29 +02001499 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001500 * The sta might be in psm against the ap (e.g. because
1501 * this was the state before a hw restart), so we
1502 * explicitly send a null packet in order to make sure
1503 * it'll sync against the ap (and get out of psm).
1504 */
1505 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1506 list_for_each_entry(sdata, &local->interfaces, list) {
1507 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1508 continue;
1509
1510 ieee80211_send_nullfunc(local, sdata, 0);
1511 }
1512 }
1513
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001514 /* APs are now beaconing, add back stations */
1515 mutex_lock(&local->sta_mtx);
1516 list_for_each_entry(sta, &local->sta_list, list) {
1517 enum ieee80211_sta_state state;
1518
1519 if (!sta->uploaded)
1520 continue;
1521
1522 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1523 continue;
1524
1525 for (state = IEEE80211_STA_NOTEXIST;
1526 state < sta->sta_state; state++)
1527 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1528 state + 1));
1529 }
1530 mutex_unlock(&local->sta_mtx);
1531
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001532 /* add back keys */
1533 list_for_each_entry(sdata, &local->interfaces, list)
1534 if (ieee80211_sdata_running(sdata))
1535 ieee80211_enable_keys(sdata);
1536
Eliad Pellerc6209482012-07-02 15:08:25 +03001537 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001538 local->in_reconfig = false;
1539 barrier();
1540
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001541 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001542 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1543 * sessions can be established after a resume.
1544 *
1545 * Also tear down aggregation sessions since reconfiguring
1546 * them in a hardware restart scenario is not easily done
1547 * right now, and the hardware will have lost information
1548 * about the sessions, but we and the AP still think they
1549 * are active. This is really a workaround though.
1550 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001551 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001552 mutex_lock(&local->sta_mtx);
1553
1554 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg53f73c02010-10-05 19:37:40 +02001555 ieee80211_sta_tear_down_BA_sessions(sta, true);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001556 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001557 }
Johannes Berg2a419052010-06-10 10:21:29 +02001558
1559 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001560 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001561
Johannes Bergf2753dd2009-04-14 10:09:24 +02001562 ieee80211_wake_queues_by_reason(hw,
1563 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1564
Johannes Berg5bb644a2009-05-17 11:40:42 +02001565 /*
1566 * If this is for hw restart things are still running.
1567 * We may want to change that later, however.
1568 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001569 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001570 return 0;
1571
1572#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001573 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001574 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001575 mb();
1576 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001577
1578 list_for_each_entry(sdata, &local->interfaces, list) {
1579 switch(sdata->vif.type) {
1580 case NL80211_IFTYPE_STATION:
1581 ieee80211_sta_restart(sdata);
1582 break;
1583 case NL80211_IFTYPE_ADHOC:
1584 ieee80211_ibss_restart(sdata);
1585 break;
1586 case NL80211_IFTYPE_MESH_POINT:
1587 ieee80211_mesh_restart(sdata);
1588 break;
1589 default:
1590 break;
1591 }
1592 }
1593
Johannes Berg26d59532011-04-01 13:52:48 +02001594 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001595
Johannes Berg34e89502010-02-03 13:59:58 +01001596 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001597 list_for_each_entry(sta, &local->sta_list, list)
1598 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001599 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001600#else
1601 WARN_ON(1);
1602#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001603 return 0;
1604}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001605
Johannes Berg95acac62011-07-12 12:30:59 +02001606void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1607{
1608 struct ieee80211_sub_if_data *sdata;
1609 struct ieee80211_local *local;
1610 struct ieee80211_key *key;
1611
1612 if (WARN_ON(!vif))
1613 return;
1614
1615 sdata = vif_to_sdata(vif);
1616 local = sdata->local;
1617
1618 if (WARN_ON(!local->resuming))
1619 return;
1620
1621 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1622 return;
1623
1624 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1625
1626 mutex_lock(&local->key_mtx);
1627 list_for_each_entry(key, &sdata->key_list, list)
1628 key->flags |= KEY_FLAG_TAINTED;
1629 mutex_unlock(&local->key_mtx);
1630}
1631EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1632
Johannes Berg04ecd252012-09-11 14:34:12 +02001633void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
Johannes Berg0f782312009-12-01 13:37:02 +01001634{
Johannes Berg04ecd252012-09-11 14:34:12 +02001635 struct ieee80211_local *local = sdata->local;
1636 struct ieee80211_chanctx_conf *chanctx_conf;
1637 struct ieee80211_chanctx *chanctx;
Johannes Berg0f782312009-12-01 13:37:02 +01001638
Johannes Berg04ecd252012-09-11 14:34:12 +02001639 mutex_lock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001640
Johannes Berg04ecd252012-09-11 14:34:12 +02001641 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1642 lockdep_is_held(&local->chanctx_mtx));
Johannes Berg0f782312009-12-01 13:37:02 +01001643
Johannes Berg04ecd252012-09-11 14:34:12 +02001644 if (WARN_ON_ONCE(!chanctx_conf))
Johannes Berg5d8e4232012-09-11 10:17:11 +02001645 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01001646
Johannes Berg04ecd252012-09-11 14:34:12 +02001647 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1648 ieee80211_recalc_smps_chanctx(local, chanctx);
Johannes Berg5d8e4232012-09-11 10:17:11 +02001649 unlock:
Johannes Berg04ecd252012-09-11 14:34:12 +02001650 mutex_unlock(&local->chanctx_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001651}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001652
1653static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1654{
1655 int i;
1656
1657 for (i = 0; i < n_ids; i++)
1658 if (ids[i] == id)
1659 return true;
1660 return false;
1661}
1662
1663/**
1664 * ieee80211_ie_split - split an IE buffer according to ordering
1665 *
1666 * @ies: the IE buffer
1667 * @ielen: the length of the IE buffer
1668 * @ids: an array with element IDs that are allowed before
1669 * the split
1670 * @n_ids: the size of the element ID array
1671 * @offset: offset where to start splitting in the buffer
1672 *
1673 * This function splits an IE buffer by updating the @offset
1674 * variable to point to the location where the buffer should be
1675 * split.
1676 *
1677 * It assumes that the given IE buffer is well-formed, this
1678 * has to be guaranteed by the caller!
1679 *
1680 * It also assumes that the IEs in the buffer are ordered
1681 * correctly, if not the result of using this function will not
1682 * be ordered correctly either, i.e. it does no reordering.
1683 *
1684 * The function returns the offset where the next part of the
1685 * buffer starts, which may be @ielen if the entire (remainder)
1686 * of the buffer should be used.
1687 */
1688size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1689 const u8 *ids, int n_ids, size_t offset)
1690{
1691 size_t pos = offset;
1692
1693 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1694 pos += 2 + ies[pos + 1];
1695
1696 return pos;
1697}
1698
1699size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1700{
1701 size_t pos = offset;
1702
1703 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1704 pos += 2 + ies[pos + 1];
1705
1706 return pos;
1707}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001708
1709static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1710 int rssi_min_thold,
1711 int rssi_max_thold)
1712{
1713 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1714
1715 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1716 return;
1717
1718 /*
1719 * Scale up threshold values before storing it, as the RSSI averaging
1720 * algorithm uses a scaled up value as well. Change this scaling
1721 * factor if the RSSI averaging algorithm changes.
1722 */
1723 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1724 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1725}
1726
1727void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1728 int rssi_min_thold,
1729 int rssi_max_thold)
1730{
1731 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1732
1733 WARN_ON(rssi_min_thold == rssi_max_thold ||
1734 rssi_min_thold > rssi_max_thold);
1735
1736 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1737 rssi_max_thold);
1738}
1739EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1740
1741void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1742{
1743 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1744
1745 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1746}
1747EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03001748
Ben Greearef96a8422011-11-18 11:32:00 -08001749u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001750 u16 cap)
1751{
1752 __le16 tmp;
1753
1754 *pos++ = WLAN_EID_HT_CAPABILITY;
1755 *pos++ = sizeof(struct ieee80211_ht_cap);
1756 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1757
1758 /* capability flags */
1759 tmp = cpu_to_le16(cap);
1760 memcpy(pos, &tmp, sizeof(u16));
1761 pos += sizeof(u16);
1762
1763 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001764 *pos++ = ht_cap->ampdu_factor |
1765 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07001766 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1767
1768 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08001769 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1770 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001771
1772 /* extended capabilities */
1773 pos += sizeof(__le16);
1774
1775 /* BF capabilities */
1776 pos += sizeof(__le32);
1777
1778 /* antenna selection */
1779 pos += sizeof(u8);
1780
1781 return pos;
1782}
1783
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001784u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1785 u32 cap)
1786{
1787 __le32 tmp;
1788
1789 *pos++ = WLAN_EID_VHT_CAPABILITY;
Mahesh Palivelad4950282012-10-10 11:25:40 +00001790 *pos++ = sizeof(struct ieee80211_vht_cap);
1791 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001792
1793 /* capability flags */
1794 tmp = cpu_to_le32(cap);
1795 memcpy(pos, &tmp, sizeof(u32));
1796 pos += sizeof(u32);
1797
1798 /* VHT MCS set */
1799 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1800 pos += sizeof(vht_cap->vht_mcs);
1801
1802 return pos;
1803}
1804
Johannes Berg074d46d2012-03-15 19:45:16 +01001805u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001806 struct ieee80211_channel *channel,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001807 enum nl80211_channel_type channel_type,
1808 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001809{
Johannes Berg074d46d2012-03-15 19:45:16 +01001810 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001811 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01001812 *pos++ = WLAN_EID_HT_OPERATION;
1813 *pos++ = sizeof(struct ieee80211_ht_operation);
1814 ht_oper = (struct ieee80211_ht_operation *)pos;
1815 ht_oper->primary_chan =
Alexander Simon42e7aa72011-10-26 14:47:26 -07001816 ieee80211_frequency_to_channel(channel->center_freq);
1817 switch (channel_type) {
1818 case NL80211_CHAN_HT40MINUS:
Johannes Berg074d46d2012-03-15 19:45:16 +01001819 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001820 break;
1821 case NL80211_CHAN_HT40PLUS:
Johannes Berg074d46d2012-03-15 19:45:16 +01001822 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001823 break;
1824 case NL80211_CHAN_HT20:
1825 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01001826 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001827 break;
1828 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07001829 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1830 channel_type != NL80211_CHAN_NO_HT &&
1831 channel_type != NL80211_CHAN_HT20)
Johannes Berg074d46d2012-03-15 19:45:16 +01001832 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01001833
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001834 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01001835 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001836
1837 /* It seems that Basic MCS set and Supported MCS set
1838 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01001839 memset(&ht_oper->basic_set, 0, 16);
1840 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001841
Johannes Berg074d46d2012-03-15 19:45:16 +01001842 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001843}
1844
1845enum nl80211_channel_type
Johannes Berg074d46d2012-03-15 19:45:16 +01001846ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001847{
1848 enum nl80211_channel_type channel_type;
1849
Johannes Berg074d46d2012-03-15 19:45:16 +01001850 if (!ht_oper)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001851 return NL80211_CHAN_NO_HT;
1852
Johannes Berg074d46d2012-03-15 19:45:16 +01001853 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07001854 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1855 channel_type = NL80211_CHAN_HT20;
1856 break;
1857 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1858 channel_type = NL80211_CHAN_HT40PLUS;
1859 break;
1860 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1861 channel_type = NL80211_CHAN_HT40MINUS;
1862 break;
1863 default:
1864 channel_type = NL80211_CHAN_NO_HT;
1865 }
1866
1867 return channel_type;
1868}
1869
Johannes Bergfc8a7322012-06-28 10:33:25 +02001870int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02001871 struct sk_buff *skb, bool need_basic,
1872 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03001873{
Arik Nemtsov768db342011-09-28 14:12:51 +03001874 struct ieee80211_local *local = sdata->local;
1875 struct ieee80211_supported_band *sband;
1876 int rate;
1877 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02001878 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03001879
Johannes Berg6b778632012-07-23 14:53:27 +02001880 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03001881 rates = sband->n_bitrates;
1882 if (rates > 8)
1883 rates = 8;
1884
1885 if (skb_tailroom(skb) < rates + 2)
1886 return -ENOMEM;
1887
1888 pos = skb_put(skb, rates + 2);
1889 *pos++ = WLAN_EID_SUPP_RATES;
1890 *pos++ = rates;
1891 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001892 u8 basic = 0;
1893 if (need_basic && basic_rates & BIT(i))
1894 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03001895 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001896 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03001897 }
1898
1899 return 0;
1900}
1901
Johannes Bergfc8a7322012-06-28 10:33:25 +02001902int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02001903 struct sk_buff *skb, bool need_basic,
1904 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03001905{
Arik Nemtsov768db342011-09-28 14:12:51 +03001906 struct ieee80211_local *local = sdata->local;
1907 struct ieee80211_supported_band *sband;
1908 int rate;
1909 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02001910 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03001911
Johannes Berg6b778632012-07-23 14:53:27 +02001912 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03001913 exrates = sband->n_bitrates;
1914 if (exrates > 8)
1915 exrates -= 8;
1916 else
1917 exrates = 0;
1918
1919 if (skb_tailroom(skb) < exrates + 2)
1920 return -ENOMEM;
1921
1922 if (exrates) {
1923 pos = skb_put(skb, exrates + 2);
1924 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1925 *pos++ = exrates;
1926 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001927 u8 basic = 0;
1928 if (need_basic && basic_rates & BIT(i))
1929 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03001930 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001931 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03001932 }
1933 }
1934 return 0;
1935}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07001936
1937int ieee80211_ave_rssi(struct ieee80211_vif *vif)
1938{
1939 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1940 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1941
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07001942 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
1943 /* non-managed type inferfaces */
1944 return 0;
1945 }
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07001946 return ifmgd->ave_beacon_signal;
1947}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07001948EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
Johannes Berg04ecd252012-09-11 14:34:12 +02001949
1950u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
1951{
1952 if (!mcs)
1953 return 1;
1954
1955 /* TODO: consider rx_highest */
1956
1957 if (mcs->rx_mask[3])
1958 return 4;
1959 if (mcs->rx_mask[2])
1960 return 3;
1961 if (mcs->rx_mask[1])
1962 return 2;
1963 return 1;
1964}