blob: 22ca35054dd065753b9e7d6c4f3e5ab990903e83 [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;
744 case WLAN_EID_MESH_ID:
745 elems->mesh_id = pos;
746 elems->mesh_id_len = elen;
747 break;
748 case WLAN_EID_MESH_CONFIG:
749 if (elen >= sizeof(struct ieee80211_meshconf_ie))
750 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800751 else
752 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100753 break;
754 case WLAN_EID_PEER_MGMT:
755 elems->peering = pos;
756 elems->peering_len = elen;
757 break;
758 case WLAN_EID_PREQ:
759 elems->preq = pos;
760 elems->preq_len = elen;
761 break;
762 case WLAN_EID_PREP:
763 elems->prep = pos;
764 elems->prep_len = elen;
765 break;
766 case WLAN_EID_PERR:
767 elems->perr = pos;
768 elems->perr_len = elen;
769 break;
770 case WLAN_EID_RANN:
771 if (elen >= sizeof(struct ieee80211_rann_ie))
772 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800773 else
774 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100775 break;
776 case WLAN_EID_CHANNEL_SWITCH:
Johannes Berg5bc14202012-08-01 16:13:02 +0200777 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
778 elem_parse_failed = true;
779 break;
780 }
781 elems->ch_switch_ie = (void *)pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100782 break;
783 case WLAN_EID_QUIET:
784 if (!elems->quiet_elem) {
785 elems->quiet_elem = pos;
786 elems->quiet_elem_len = elen;
787 }
788 elems->num_of_quiet_elem++;
789 break;
790 case WLAN_EID_COUNTRY:
791 elems->country_elem = pos;
792 elems->country_elem_len = elen;
793 break;
794 case WLAN_EID_PWR_CONSTRAINT:
Johannes Berg761a48d2012-09-05 13:07:00 +0200795 if (elen != 1) {
796 elem_parse_failed = true;
797 break;
798 }
Johannes Bergdd769862011-11-18 16:54:50 +0100799 elems->pwr_constr_elem = pos;
Johannes Bergdd769862011-11-18 16:54:50 +0100800 break;
801 case WLAN_EID_TIMEOUT_INTERVAL:
802 elems->timeout_int = pos;
803 elems->timeout_int_len = elen;
804 break;
805 default:
806 break;
807 }
808
Paul Stewartfcff4f12012-02-23 17:59:53 -0800809 if (elem_parse_failed)
810 elems->parse_error = true;
811 else
812 set_bit(id, seen_elems);
813
Johannes Bergdd769862011-11-18 16:54:50 +0100814 left -= elen;
815 pos += elen;
816 }
817
Paul Stewartfcff4f12012-02-23 17:59:53 -0800818 if (left != 0)
819 elems->parse_error = true;
820
Johannes Bergdd769862011-11-18 16:54:50 +0100821 return crc;
822}
823
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200824void ieee802_11_parse_elems(u8 *start, size_t len,
825 struct ieee802_11_elems *elems)
826{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200827 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
828}
829
Johannes Berg3abead52012-03-02 15:56:59 +0100830void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
831 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200832{
833 struct ieee80211_local *local = sdata->local;
834 struct ieee80211_tx_queue_params qparam;
Johannes Berg54bcbc62012-03-28 11:04:25 +0200835 int ac;
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200836 bool use_11b, enable_qos;
Johannes Bergaa837e12009-05-07 16:16:24 +0200837 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200838
839 if (!local->ops->conf_tx)
840 return;
841
Johannes Berg54bcbc62012-03-28 11:04:25 +0200842 if (local->hw.queues < IEEE80211_NUM_ACS)
843 return;
844
Johannes Berg5825fe102008-09-09 12:56:01 +0200845 memset(&qparam, 0, sizeof(qparam));
846
Johannes Berg679ef4e2012-07-23 14:29:21 +0200847 use_11b = (local->oper_channel->band == IEEE80211_BAND_2GHZ) &&
Johannes Bergaa837e12009-05-07 16:16:24 +0200848 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe102008-09-09 12:56:01 +0200849
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200850 /*
851 * By default disable QoS in STA mode for old access points, which do
852 * not support 802.11e. New APs will provide proper queue parameters,
853 * that we will configure later.
854 */
855 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
856
Johannes Berg54bcbc62012-03-28 11:04:25 +0200857 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
Johannes Bergaa837e12009-05-07 16:16:24 +0200858 /* Set defaults according to 802.11-2007 Table 7-37 */
859 aCWmax = 1023;
860 if (use_11b)
861 aCWmin = 31;
862 else
863 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200864
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200865 if (enable_qos) {
866 switch (ac) {
867 case IEEE80211_AC_BK:
868 qparam.cw_max = aCWmax;
869 qparam.cw_min = aCWmin;
870 qparam.txop = 0;
871 qparam.aifs = 7;
872 break;
873 /* never happens but let's not leave undefined */
874 default:
875 case IEEE80211_AC_BE:
876 qparam.cw_max = aCWmax;
877 qparam.cw_min = aCWmin;
878 qparam.txop = 0;
879 qparam.aifs = 3;
880 break;
881 case IEEE80211_AC_VI:
882 qparam.cw_max = aCWmin;
883 qparam.cw_min = (aCWmin + 1) / 2 - 1;
884 if (use_11b)
885 qparam.txop = 6016/32;
886 else
887 qparam.txop = 3008/32;
888 qparam.aifs = 2;
889 break;
890 case IEEE80211_AC_VO:
891 qparam.cw_max = (aCWmin + 1) / 2 - 1;
892 qparam.cw_min = (aCWmin + 1) / 4 - 1;
893 if (use_11b)
894 qparam.txop = 3264/32;
895 else
896 qparam.txop = 1504/32;
897 qparam.aifs = 2;
898 break;
899 }
900 } else {
901 /* Confiure old 802.11b/g medium access rules. */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200902 qparam.cw_max = aCWmax;
903 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200904 qparam.txop = 0;
Johannes Bergaa837e12009-05-07 16:16:24 +0200905 qparam.aifs = 2;
Johannes Bergaa837e12009-05-07 16:16:24 +0200906 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200907
Kalle Valoab133152010-01-12 10:42:31 +0200908 qparam.uapsd = false;
909
Johannes Berg54bcbc62012-03-28 11:04:25 +0200910 sdata->tx_conf[ac] = qparam;
911 drv_conf_tx(local, sdata, ac, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +0200912 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200913
Johannes Bergf142c6b2012-06-18 20:07:15 +0200914 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
915 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
Stanislaw Gruszkaa8ce8542012-05-30 10:56:46 +0200916 sdata->vif.bss_conf.qos = enable_qos;
Johannes Berg3abead52012-03-02 15:56:59 +0100917 if (bss_notify)
918 ieee80211_bss_info_change_notify(sdata,
919 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +0530920 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200921}
Johannes Berge50db652008-09-09 15:07:09 +0200922
Johannes Berg46900292009-02-15 12:44:28 +0100923void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
924 const size_t supp_rates_len,
925 const u8 *supp_rates)
926{
927 struct ieee80211_local *local = sdata->local;
928 int i, have_higher_than_11mbit = 0;
929
930 /* cf. IEEE 802.11 9.2.12 */
931 for (i = 0; i < supp_rates_len; i++)
932 if ((supp_rates[i] & 0x7f) * 5 > 110)
933 have_higher_than_11mbit = 1;
934
Johannes Berg679ef4e2012-07-23 14:29:21 +0200935 if (local->oper_channel->band == IEEE80211_BAND_2GHZ &&
Johannes Berg46900292009-02-15 12:44:28 +0100936 have_higher_than_11mbit)
937 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
938 else
939 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
940
Johannes Berg3abead52012-03-02 15:56:59 +0100941 ieee80211_set_wmm_default(sdata, true);
Johannes Berg46900292009-02-15 12:44:28 +0100942}
943
Johannes Berg881d9482009-01-21 15:13:48 +0100944u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200945 enum ieee80211_band band)
946{
947 struct ieee80211_supported_band *sband;
948 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100949 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200950 enum ieee80211_rate_flags mandatory_flag;
951 int i;
952
953 sband = local->hw.wiphy->bands[band];
Michal Kazior4ee73f32012-04-11 08:47:56 +0200954 if (WARN_ON(!sband))
955 return 1;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200956
957 if (band == IEEE80211_BAND_2GHZ)
958 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
959 else
960 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
961
962 bitrates = sband->bitrates;
963 mandatory_rates = 0;
964 for (i = 0; i < sband->n_bitrates; i++)
965 if (bitrates[i].flags & mandatory_flag)
966 mandatory_rates |= BIT(i);
967 return mandatory_rates;
968}
Johannes Berg46900292009-02-15 12:44:28 +0100969
970void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
971 u16 transaction, u16 auth_alg,
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100972 u8 *extra, size_t extra_len, const u8 *da,
973 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100974{
975 struct ieee80211_local *local = sdata->local;
976 struct sk_buff *skb;
977 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +0200978 int err;
Johannes Berg46900292009-02-15 12:44:28 +0100979
980 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200981 sizeof(*mgmt) + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -0700982 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +0100983 return;
Joe Perchesd15b8452011-08-29 14:17:31 -0700984
Johannes Berg46900292009-02-15 12:44:28 +0100985 skb_reserve(skb, local->hw.extra_tx_headroom);
986
987 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
988 memset(mgmt, 0, 24 + 6);
989 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
990 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100991 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100992 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100993 memcpy(mgmt->bssid, bssid, ETH_ALEN);
994 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
995 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
996 mgmt->u.auth.status_code = cpu_to_le16(0);
997 if (extra)
998 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100999
Johannes Bergfffd0932009-07-08 14:22:54 +02001000 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1001 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1002 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1003 WARN_ON(err);
1004 }
1005
Johannes Berg62ae67b2009-11-18 18:42:05 +01001006 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1007 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001008}
1009
Antonio Quartulli6ae16772012-09-07 13:28:52 +02001010void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1011 const u8 *bssid, u16 stype, u16 reason,
1012 bool send_frame, u8 *frame_buf)
1013{
1014 struct ieee80211_local *local = sdata->local;
1015 struct sk_buff *skb;
1016 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1017
1018 /* build frame */
1019 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1020 mgmt->duration = 0; /* initialize only */
1021 mgmt->seq_ctrl = 0; /* initialize only */
1022 memcpy(mgmt->da, bssid, ETH_ALEN);
1023 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1024 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1025 /* u.deauth.reason_code == u.disassoc.reason_code */
1026 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1027
1028 if (send_frame) {
1029 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1030 IEEE80211_DEAUTH_FRAME_LEN);
1031 if (!skb)
1032 return;
1033
1034 skb_reserve(skb, local->hw.extra_tx_headroom);
1035
1036 /* copy in frame */
1037 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1038 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1039
1040 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1041 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1042 IEEE80211_SKB_CB(skb)->flags |=
1043 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1044
1045 ieee80211_tx_skb(sdata, skb);
1046 }
1047}
1048
Johannes Bergde95a542009-04-01 11:58:36 +02001049int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec582009-10-27 20:59:55 +01001050 const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +03001051 enum ieee80211_band band, u32 rate_mask,
1052 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +02001053{
1054 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001055 u8 *pos;
1056 size_t offset = 0, noffset;
1057 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001058 u8 rates[32];
1059 int num_rates;
1060 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001061
Johannes Berg4d36ec582009-10-27 20:59:55 +01001062 sband = local->hw.wiphy->bands[band];
Arik Nemtsovd811b3d2012-07-09 19:57:28 +03001063 if (WARN_ON_ONCE(!sband))
1064 return 0;
Johannes Bergde95a542009-04-01 11:58:36 +02001065
1066 pos = buffer;
1067
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001068 num_rates = 0;
1069 for (i = 0; i < sband->n_bitrates; i++) {
1070 if ((BIT(i) & rate_mask) == 0)
1071 continue; /* skip rate */
1072 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
1073 }
1074
1075 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +01001076
Johannes Bergde95a542009-04-01 11:58:36 +02001077 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001078 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001079 memcpy(pos, rates, supp_rates_len);
1080 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +02001081
Johannes Berg8e664fb2009-12-23 13:15:38 +01001082 /* insert "request information" if in custom IEs */
1083 if (ie && ie_len) {
1084 static const u8 before_extrates[] = {
1085 WLAN_EID_SSID,
1086 WLAN_EID_SUPP_RATES,
1087 WLAN_EID_REQUEST,
1088 };
1089 noffset = ieee80211_ie_split(ie, ie_len,
1090 before_extrates,
1091 ARRAY_SIZE(before_extrates),
1092 offset);
1093 memcpy(pos, ie + offset, noffset - offset);
1094 pos += noffset - offset;
1095 offset = noffset;
1096 }
Johannes Bergde95a542009-04-01 11:58:36 +02001097
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001098 ext_rates_len = num_rates - supp_rates_len;
1099 if (ext_rates_len > 0) {
Johannes Berg8e664fb2009-12-23 13:15:38 +01001100 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001101 *pos++ = ext_rates_len;
1102 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1103 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +01001104 }
1105
Jouni Malinen651b5222010-08-28 19:37:51 +03001106 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
1107 *pos++ = WLAN_EID_DS_PARAMS;
1108 *pos++ = 1;
1109 *pos++ = channel;
1110 }
1111
Johannes Berg8e664fb2009-12-23 13:15:38 +01001112 /* insert custom IEs that go before HT */
1113 if (ie && ie_len) {
1114 static const u8 before_ht[] = {
1115 WLAN_EID_SSID,
1116 WLAN_EID_SUPP_RATES,
1117 WLAN_EID_REQUEST,
1118 WLAN_EID_EXT_SUPP_RATES,
1119 WLAN_EID_DS_PARAMS,
1120 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1121 };
1122 noffset = ieee80211_ie_split(ie, ie_len,
1123 before_ht, ARRAY_SIZE(before_ht),
1124 offset);
1125 memcpy(pos, ie + offset, noffset - offset);
1126 pos += noffset - offset;
1127 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001128 }
1129
Alexander Simon42e7aa72011-10-26 14:47:26 -07001130 if (sband->ht_cap.ht_supported)
Ben Greearef96a8422011-11-18 11:32:00 -08001131 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1132 sband->ht_cap.cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +02001133
Johannes Bergde95a542009-04-01 11:58:36 +02001134 /*
1135 * If adding more here, adjust code in main.c
1136 * that calculates local->scan_ies_len.
1137 */
1138
Johannes Berg8e664fb2009-12-23 13:15:38 +01001139 /* add any remaining custom IEs */
1140 if (ie && ie_len) {
1141 noffset = ie_len;
1142 memcpy(pos, ie + offset, noffset - offset);
1143 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001144 }
1145
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001146 if (sband->vht_cap.vht_supported)
1147 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1148 sband->vht_cap.cap);
1149
Johannes Bergde95a542009-04-01 11:58:36 +02001150 return pos - buffer;
1151}
1152
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001153struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001154 u8 *dst, u32 ratemask,
Johannes Berg6b778632012-07-23 14:53:27 +02001155 struct ieee80211_channel *chan,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001156 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001157 const u8 *ie, size_t ie_len,
1158 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001159{
1160 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001161 struct sk_buff *skb;
1162 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001163 size_t buf_len;
1164 u8 *buf;
Johannes Berg6b778632012-07-23 14:53:27 +02001165 u8 chan_no;
Johannes Berg46900292009-02-15 12:44:28 +01001166
Kalle Valo7c12ce82010-01-05 20:16:44 +02001167 /* FIXME: come up with a proper value */
1168 buf = kmalloc(200 + ie_len, GFP_KERNEL);
Joe Perchesd15b8452011-08-29 14:17:31 -07001169 if (!buf)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001170 return NULL;
Johannes Berg46900292009-02-15 12:44:28 +01001171
Paul Stewarta806c552011-06-23 09:00:11 -08001172 /*
1173 * Do not send DS Channel parameter for directed probe requests
1174 * in order to maximize the chance that we get a response. Some
1175 * badly-behaved APs don't respond when this parameter is included.
1176 */
1177 if (directed)
Johannes Berg6b778632012-07-23 14:53:27 +02001178 chan_no = 0;
Paul Stewarta806c552011-06-23 09:00:11 -08001179 else
Johannes Berg6b778632012-07-23 14:53:27 +02001180 chan_no = ieee80211_frequency_to_channel(chan->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001181
Johannes Berg6b778632012-07-23 14:53:27 +02001182 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len, chan->band,
1183 ratemask, chan_no);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001184
1185 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1186 ssid, ssid_len,
1187 buf, buf_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001188 if (!skb)
1189 goto out;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001190
Johannes Berg46900292009-02-15 12:44:28 +01001191 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001192 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001193 memcpy(mgmt->da, dst, ETH_ALEN);
1194 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001195 }
Johannes Berg46900292009-02-15 12:44:28 +01001196
Johannes Berg62ae67b2009-11-18 18:42:05 +01001197 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001198
1199 out:
Ming Lei145b6d12010-01-15 21:44:21 +08001200 kfree(buf);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001201
1202 return skb;
1203}
1204
1205void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1206 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001207 const u8 *ie, size_t ie_len,
Johannes Bergfe94fe02012-07-30 12:26:34 +02001208 u32 ratemask, bool directed, bool no_cck,
1209 struct ieee80211_channel *channel)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001210{
1211 struct sk_buff *skb;
1212
Johannes Bergfe94fe02012-07-30 12:26:34 +02001213 skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
Johannes Berg6b778632012-07-23 14:53:27 +02001214 ssid, ssid_len,
Johannes Berg85a237f2011-07-18 18:08:36 +02001215 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301216 if (skb) {
1217 if (no_cck)
1218 IEEE80211_SKB_CB(skb)->flags |=
1219 IEEE80211_TX_CTL_NO_CCK_RATE;
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001220 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301221 }
Johannes Berg46900292009-02-15 12:44:28 +01001222}
1223
1224u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1225 struct ieee802_11_elems *elems,
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001226 enum ieee80211_band band, u32 *basic_rates)
Johannes Berg46900292009-02-15 12:44:28 +01001227{
1228 struct ieee80211_supported_band *sband;
1229 struct ieee80211_rate *bitrates;
1230 size_t num_rates;
1231 u32 supp_rates;
1232 int i, j;
1233 sband = local->hw.wiphy->bands[band];
1234
Michal Kazior4ee73f32012-04-11 08:47:56 +02001235 if (WARN_ON(!sband))
1236 return 1;
Johannes Berg46900292009-02-15 12:44:28 +01001237
1238 bitrates = sband->bitrates;
1239 num_rates = sband->n_bitrates;
1240 supp_rates = 0;
1241 for (i = 0; i < elems->supp_rates_len +
1242 elems->ext_supp_rates_len; i++) {
1243 u8 rate = 0;
1244 int own_rate;
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001245 bool is_basic;
Johannes Berg46900292009-02-15 12:44:28 +01001246 if (i < elems->supp_rates_len)
1247 rate = elems->supp_rates[i];
1248 else if (elems->ext_supp_rates)
1249 rate = elems->ext_supp_rates
1250 [i - elems->supp_rates_len];
1251 own_rate = 5 * (rate & 0x7f);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001252 is_basic = !!(rate & 0x80);
1253
1254 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1255 continue;
1256
1257 for (j = 0; j < num_rates; j++) {
1258 if (bitrates[j].bitrate == own_rate) {
Johannes Berg46900292009-02-15 12:44:28 +01001259 supp_rates |= BIT(j);
Ashok Nagarajan9ebb61a2012-04-02 21:21:21 -07001260 if (basic_rates && is_basic)
1261 *basic_rates |= BIT(j);
1262 }
1263 }
Johannes Berg46900292009-02-15 12:44:28 +01001264 }
1265 return supp_rates;
1266}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001267
Johannes Berg84f6a012009-08-20 20:02:20 +02001268void ieee80211_stop_device(struct ieee80211_local *local)
1269{
1270 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001271 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001272
1273 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001274
1275 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001276 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001277}
1278
Johannes Bergf2753dd2009-04-14 10:09:24 +02001279int ieee80211_reconfig(struct ieee80211_local *local)
1280{
1281 struct ieee80211_hw *hw = &local->hw;
1282 struct ieee80211_sub_if_data *sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001283 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001284 int res, i;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001285
Johannes Bergeecc4802011-05-04 15:37:29 +02001286#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001287 if (local->suspended)
1288 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001289
Johannes Bergeecc4802011-05-04 15:37:29 +02001290 if (local->wowlan) {
1291 local->wowlan = false;
1292 res = drv_resume(local);
1293 if (res < 0) {
1294 local->resuming = false;
1295 return res;
1296 }
1297 if (res == 0)
1298 goto wake_up;
1299 WARN_ON(res > 1);
1300 /*
1301 * res is 1, which means the driver requested
1302 * to go through a regular reset on wakeup.
1303 */
1304 }
1305#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001306 /* everything else happens only if HW was up & running */
1307 if (!local->open_count)
1308 goto wake_up;
1309
1310 /*
1311 * Upon resume hardware can sometimes be goofy due to
1312 * various platform / driver / bus issues, so restarting
1313 * the device may at times not work immediately. Propagate
1314 * the error.
1315 */
1316 res = drv_start(local);
1317 if (res) {
1318 WARN(local->suspended, "Hardware became unavailable "
1319 "upon resume. This could be a software issue "
1320 "prior to suspend or a hardware issue.\n");
1321 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001322 }
1323
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301324 /* setup fragmentation threshold */
1325 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1326
1327 /* setup RTS threshold */
1328 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1329
1330 /* reset coverage class */
1331 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1332
Johannes Berg94f9b972011-07-14 16:48:54 +02001333 ieee80211_led_radio(local, true);
1334 ieee80211_mod_tpt_led_trig(local,
1335 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1336
Johannes Bergf2753dd2009-04-14 10:09:24 +02001337 /* add interfaces */
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001338 sdata = rtnl_dereference(local->monitor_sdata);
1339 if (sdata) {
1340 res = drv_add_interface(local, sdata);
1341 if (WARN_ON(res)) {
1342 rcu_assign_pointer(local->monitor_sdata, NULL);
1343 synchronize_net();
1344 kfree(sdata);
1345 }
1346 }
1347
Johannes Bergf2753dd2009-04-14 10:09:24 +02001348 list_for_each_entry(sdata, &local->interfaces, list) {
1349 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1350 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001351 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001352 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001353 }
1354
1355 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001356 mutex_lock(&local->sta_mtx);
1357 list_for_each_entry(sta, &local->sta_list, list) {
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001358 enum ieee80211_sta_state state;
Johannes Bergf09603a2012-01-20 13:55:21 +01001359
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001360 if (!sta->uploaded)
1361 continue;
1362
1363 /* AP-mode stations will be added later */
1364 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1365 continue;
1366
1367 for (state = IEEE80211_STA_NOTEXIST;
1368 state < sta->sta_state; state++)
1369 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1370 state + 1));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001371 }
Johannes Berg34e89502010-02-03 13:59:58 +01001372 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001373
Eliad Peller2683d652011-07-14 20:29:42 +03001374 /* reconfigure tx conf */
Johannes Berg54bcbc62012-03-28 11:04:25 +02001375 if (hw->queues >= IEEE80211_NUM_ACS) {
1376 list_for_each_entry(sdata, &local->interfaces, list) {
1377 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1378 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1379 !ieee80211_sdata_running(sdata))
1380 continue;
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001381
Johannes Berg54bcbc62012-03-28 11:04:25 +02001382 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1383 drv_conf_tx(local, sdata, i,
1384 &sdata->tx_conf[i]);
1385 }
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001386 }
Eliad Peller2683d652011-07-14 20:29:42 +03001387
Johannes Bergf2753dd2009-04-14 10:09:24 +02001388 /* reconfigure hardware */
1389 ieee80211_hw_config(local, ~0);
1390
Johannes Bergf2753dd2009-04-14 10:09:24 +02001391 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001392
1393 /* Finally also reconfigure all the BSS information */
1394 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001395 u32 changed;
1396
Johannes Berg9607e6b2009-12-23 13:15:31 +01001397 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001398 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001399
1400 /* common change flags for all interface types */
1401 changed = BSS_CHANGED_ERP_CTS_PROT |
1402 BSS_CHANGED_ERP_PREAMBLE |
1403 BSS_CHANGED_ERP_SLOT |
1404 BSS_CHANGED_HT |
1405 BSS_CHANGED_BASIC_RATES |
1406 BSS_CHANGED_BEACON_INT |
1407 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001408 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001409 BSS_CHANGED_QOS |
1410 BSS_CHANGED_IDLE;
Johannes Bergac8dd502010-05-05 09:44:02 +02001411
Johannes Bergf2753dd2009-04-14 10:09:24 +02001412 switch (sdata->vif.type) {
1413 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001414 changed |= BSS_CHANGED_ASSOC |
Eliad Pellerab095872012-07-27 12:33:22 +03001415 BSS_CHANGED_ARP_FILTER |
1416 BSS_CHANGED_PS;
Eliad Pellera7b545f2011-02-08 18:43:19 +02001417 mutex_lock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001418 ieee80211_bss_info_change_notify(sdata, changed);
Eliad Pellera7b545f2011-02-08 18:43:19 +02001419 mutex_unlock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001420 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001421 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001422 changed |= BSS_CHANGED_IBSS;
1423 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001424 case NL80211_IFTYPE_AP:
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001425 changed |= BSS_CHANGED_SSID;
1426
1427 if (sdata->vif.type == NL80211_IFTYPE_AP)
1428 changed |= BSS_CHANGED_AP_PROBE_RESP;
1429
Arik Nemtsov78274932011-09-04 11:11:32 +03001430 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001431 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001432 changed |= BSS_CHANGED_BEACON |
1433 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001434 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001435 break;
1436 case NL80211_IFTYPE_WDS:
1437 break;
1438 case NL80211_IFTYPE_AP_VLAN:
1439 case NL80211_IFTYPE_MONITOR:
1440 /* ignore virtual */
1441 break;
Johannes Berg98104fde2012-06-16 00:19:54 +02001442 case NL80211_IFTYPE_P2P_DEVICE:
Johannes Bergf142c6b2012-06-18 20:07:15 +02001443 changed = BSS_CHANGED_IDLE;
1444 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001445 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001446 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001447 case NL80211_IFTYPE_P2P_CLIENT:
1448 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001449 WARN_ON(1);
1450 break;
1451 }
1452 }
1453
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001454 ieee80211_recalc_ps(local, -1);
1455
Johannes Berg2a419052010-06-10 10:21:29 +02001456 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001457 * The sta might be in psm against the ap (e.g. because
1458 * this was the state before a hw restart), so we
1459 * explicitly send a null packet in order to make sure
1460 * it'll sync against the ap (and get out of psm).
1461 */
1462 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1463 list_for_each_entry(sdata, &local->interfaces, list) {
1464 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1465 continue;
1466
1467 ieee80211_send_nullfunc(local, sdata, 0);
1468 }
1469 }
1470
Arik Nemtsov2e8d3972012-06-03 23:31:56 +03001471 /* APs are now beaconing, add back stations */
1472 mutex_lock(&local->sta_mtx);
1473 list_for_each_entry(sta, &local->sta_list, list) {
1474 enum ieee80211_sta_state state;
1475
1476 if (!sta->uploaded)
1477 continue;
1478
1479 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1480 continue;
1481
1482 for (state = IEEE80211_STA_NOTEXIST;
1483 state < sta->sta_state; state++)
1484 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1485 state + 1));
1486 }
1487 mutex_unlock(&local->sta_mtx);
1488
Eyal Shapira7b21aea2012-05-29 02:00:22 -07001489 /* add back keys */
1490 list_for_each_entry(sdata, &local->interfaces, list)
1491 if (ieee80211_sdata_running(sdata))
1492 ieee80211_enable_keys(sdata);
1493
Eliad Pellerc6209482012-07-02 15:08:25 +03001494 wake_up:
Arik Nemtsov04800ad2012-06-06 11:25:02 +03001495 local->in_reconfig = false;
1496 barrier();
1497
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001498 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001499 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1500 * sessions can be established after a resume.
1501 *
1502 * Also tear down aggregation sessions since reconfiguring
1503 * them in a hardware restart scenario is not easily done
1504 * right now, and the hardware will have lost information
1505 * about the sessions, but we and the AP still think they
1506 * are active. This is really a workaround though.
1507 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001508 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001509 mutex_lock(&local->sta_mtx);
1510
1511 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg53f73c02010-10-05 19:37:40 +02001512 ieee80211_sta_tear_down_BA_sessions(sta, true);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001513 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001514 }
Johannes Berg2a419052010-06-10 10:21:29 +02001515
1516 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001517 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001518
Johannes Bergf2753dd2009-04-14 10:09:24 +02001519 ieee80211_wake_queues_by_reason(hw,
1520 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1521
Johannes Berg5bb644a2009-05-17 11:40:42 +02001522 /*
1523 * If this is for hw restart things are still running.
1524 * We may want to change that later, however.
1525 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001526 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001527 return 0;
1528
1529#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001530 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001531 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001532 mb();
1533 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001534
1535 list_for_each_entry(sdata, &local->interfaces, list) {
1536 switch(sdata->vif.type) {
1537 case NL80211_IFTYPE_STATION:
1538 ieee80211_sta_restart(sdata);
1539 break;
1540 case NL80211_IFTYPE_ADHOC:
1541 ieee80211_ibss_restart(sdata);
1542 break;
1543 case NL80211_IFTYPE_MESH_POINT:
1544 ieee80211_mesh_restart(sdata);
1545 break;
1546 default:
1547 break;
1548 }
1549 }
1550
Johannes Berg26d59532011-04-01 13:52:48 +02001551 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001552
Johannes Berg34e89502010-02-03 13:59:58 +01001553 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001554 list_for_each_entry(sta, &local->sta_list, list)
1555 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001556 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001557#else
1558 WARN_ON(1);
1559#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001560 return 0;
1561}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001562
Johannes Berg95acac62011-07-12 12:30:59 +02001563void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1564{
1565 struct ieee80211_sub_if_data *sdata;
1566 struct ieee80211_local *local;
1567 struct ieee80211_key *key;
1568
1569 if (WARN_ON(!vif))
1570 return;
1571
1572 sdata = vif_to_sdata(vif);
1573 local = sdata->local;
1574
1575 if (WARN_ON(!local->resuming))
1576 return;
1577
1578 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1579 return;
1580
1581 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1582
1583 mutex_lock(&local->key_mtx);
1584 list_for_each_entry(key, &sdata->key_list, list)
1585 key->flags |= KEY_FLAG_TAINTED;
1586 mutex_unlock(&local->key_mtx);
1587}
1588EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1589
Johannes Berg0f782312009-12-01 13:37:02 +01001590static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1591 enum ieee80211_smps_mode *smps_mode)
1592{
1593 if (ifmgd->associated) {
1594 *smps_mode = ifmgd->ap_smps;
1595
1596 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1597 if (ifmgd->powersave)
1598 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1599 else
1600 *smps_mode = IEEE80211_SMPS_OFF;
1601 }
1602
1603 return 1;
1604 }
1605
1606 return 0;
1607}
1608
Johannes Berg025e6be2010-10-05 10:41:47 +02001609void ieee80211_recalc_smps(struct ieee80211_local *local)
Johannes Berg0f782312009-12-01 13:37:02 +01001610{
1611 struct ieee80211_sub_if_data *sdata;
1612 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1613 int count = 0;
1614
Johannes Berg5d8e4232012-09-11 10:17:11 +02001615 mutex_lock(&local->iflist_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001616
1617 /*
1618 * This function could be improved to handle multiple
1619 * interfaces better, but right now it makes any
1620 * non-station interfaces force SM PS to be turned
1621 * off. If there are multiple station interfaces it
1622 * could also use the best possible mode, e.g. if
1623 * one is in static and the other in dynamic then
1624 * dynamic is ok.
1625 */
1626
1627 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg26a58452010-08-27 12:35:55 +02001628 if (!ieee80211_sdata_running(sdata))
Johannes Berg0f782312009-12-01 13:37:02 +01001629 continue;
Johannes Bergf142c6b2012-06-18 20:07:15 +02001630 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
1631 continue;
Johannes Berg0f782312009-12-01 13:37:02 +01001632 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1633 goto set;
Johannes Berg025e6be2010-10-05 10:41:47 +02001634
1635 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
Johannes Berg0f782312009-12-01 13:37:02 +01001636
1637 if (count > 1) {
1638 smps_mode = IEEE80211_SMPS_OFF;
1639 break;
1640 }
1641 }
1642
1643 if (smps_mode == local->smps_mode)
Johannes Berg5d8e4232012-09-11 10:17:11 +02001644 goto unlock;
Johannes Berg0f782312009-12-01 13:37:02 +01001645
1646 set:
1647 local->smps_mode = smps_mode;
1648 /* changed flag is auto-detected for this */
1649 ieee80211_hw_config(local, 0);
Johannes Berg5d8e4232012-09-11 10:17:11 +02001650 unlock:
1651 mutex_unlock(&local->iflist_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001652}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001653
1654static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1655{
1656 int i;
1657
1658 for (i = 0; i < n_ids; i++)
1659 if (ids[i] == id)
1660 return true;
1661 return false;
1662}
1663
1664/**
1665 * ieee80211_ie_split - split an IE buffer according to ordering
1666 *
1667 * @ies: the IE buffer
1668 * @ielen: the length of the IE buffer
1669 * @ids: an array with element IDs that are allowed before
1670 * the split
1671 * @n_ids: the size of the element ID array
1672 * @offset: offset where to start splitting in the buffer
1673 *
1674 * This function splits an IE buffer by updating the @offset
1675 * variable to point to the location where the buffer should be
1676 * split.
1677 *
1678 * It assumes that the given IE buffer is well-formed, this
1679 * has to be guaranteed by the caller!
1680 *
1681 * It also assumes that the IEs in the buffer are ordered
1682 * correctly, if not the result of using this function will not
1683 * be ordered correctly either, i.e. it does no reordering.
1684 *
1685 * The function returns the offset where the next part of the
1686 * buffer starts, which may be @ielen if the entire (remainder)
1687 * of the buffer should be used.
1688 */
1689size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1690 const u8 *ids, int n_ids, size_t offset)
1691{
1692 size_t pos = offset;
1693
1694 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1695 pos += 2 + ies[pos + 1];
1696
1697 return pos;
1698}
1699
1700size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1701{
1702 size_t pos = offset;
1703
1704 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1705 pos += 2 + ies[pos + 1];
1706
1707 return pos;
1708}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001709
1710static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1711 int rssi_min_thold,
1712 int rssi_max_thold)
1713{
1714 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1715
1716 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1717 return;
1718
1719 /*
1720 * Scale up threshold values before storing it, as the RSSI averaging
1721 * algorithm uses a scaled up value as well. Change this scaling
1722 * factor if the RSSI averaging algorithm changes.
1723 */
1724 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1725 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1726}
1727
1728void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1729 int rssi_min_thold,
1730 int rssi_max_thold)
1731{
1732 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1733
1734 WARN_ON(rssi_min_thold == rssi_max_thold ||
1735 rssi_min_thold > rssi_max_thold);
1736
1737 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1738 rssi_max_thold);
1739}
1740EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1741
1742void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1743{
1744 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1745
1746 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1747}
1748EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03001749
Ben Greearef96a8422011-11-18 11:32:00 -08001750u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001751 u16 cap)
1752{
1753 __le16 tmp;
1754
1755 *pos++ = WLAN_EID_HT_CAPABILITY;
1756 *pos++ = sizeof(struct ieee80211_ht_cap);
1757 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1758
1759 /* capability flags */
1760 tmp = cpu_to_le16(cap);
1761 memcpy(pos, &tmp, sizeof(u16));
1762 pos += sizeof(u16);
1763
1764 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001765 *pos++ = ht_cap->ampdu_factor |
1766 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07001767 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1768
1769 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08001770 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1771 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001772
1773 /* extended capabilities */
1774 pos += sizeof(__le16);
1775
1776 /* BF capabilities */
1777 pos += sizeof(__le32);
1778
1779 /* antenna selection */
1780 pos += sizeof(u8);
1781
1782 return pos;
1783}
1784
Mahesh Palivelaba0afa2f2012-07-02 11:25:12 +00001785u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
1786 u32 cap)
1787{
1788 __le32 tmp;
1789
1790 *pos++ = WLAN_EID_VHT_CAPABILITY;
1791 *pos++ = sizeof(struct ieee80211_vht_capabilities);
1792 memset(pos, 0, sizeof(struct ieee80211_vht_capabilities));
1793
1794 /* capability flags */
1795 tmp = cpu_to_le32(cap);
1796 memcpy(pos, &tmp, sizeof(u32));
1797 pos += sizeof(u32);
1798
1799 /* VHT MCS set */
1800 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
1801 pos += sizeof(vht_cap->vht_mcs);
1802
1803 return pos;
1804}
1805
Johannes Berg074d46d2012-03-15 19:45:16 +01001806u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001807 struct ieee80211_channel *channel,
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001808 enum nl80211_channel_type channel_type,
1809 u16 prot_mode)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001810{
Johannes Berg074d46d2012-03-15 19:45:16 +01001811 struct ieee80211_ht_operation *ht_oper;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001812 /* Build HT Information */
Johannes Berg074d46d2012-03-15 19:45:16 +01001813 *pos++ = WLAN_EID_HT_OPERATION;
1814 *pos++ = sizeof(struct ieee80211_ht_operation);
1815 ht_oper = (struct ieee80211_ht_operation *)pos;
1816 ht_oper->primary_chan =
Alexander Simon42e7aa72011-10-26 14:47:26 -07001817 ieee80211_frequency_to_channel(channel->center_freq);
1818 switch (channel_type) {
1819 case NL80211_CHAN_HT40MINUS:
Johannes Berg074d46d2012-03-15 19:45:16 +01001820 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001821 break;
1822 case NL80211_CHAN_HT40PLUS:
Johannes Berg074d46d2012-03-15 19:45:16 +01001823 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001824 break;
1825 case NL80211_CHAN_HT20:
1826 default:
Johannes Berg074d46d2012-03-15 19:45:16 +01001827 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001828 break;
1829 }
Thomas Pedersenaee286c2012-04-18 19:24:14 -07001830 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
1831 channel_type != NL80211_CHAN_NO_HT &&
1832 channel_type != NL80211_CHAN_HT20)
Johannes Berg074d46d2012-03-15 19:45:16 +01001833 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01001834
Ashok Nagarajan431e3152012-04-30 14:20:29 -07001835 ht_oper->operation_mode = cpu_to_le16(prot_mode);
Johannes Berg074d46d2012-03-15 19:45:16 +01001836 ht_oper->stbc_param = 0x0000;
Alexander Simon42e7aa72011-10-26 14:47:26 -07001837
1838 /* It seems that Basic MCS set and Supported MCS set
1839 are identical for the first 10 bytes */
Johannes Berg074d46d2012-03-15 19:45:16 +01001840 memset(&ht_oper->basic_set, 0, 16);
1841 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001842
Johannes Berg074d46d2012-03-15 19:45:16 +01001843 return pos + sizeof(struct ieee80211_ht_operation);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001844}
1845
1846enum nl80211_channel_type
Johannes Berg074d46d2012-03-15 19:45:16 +01001847ieee80211_ht_oper_to_channel_type(struct ieee80211_ht_operation *ht_oper)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001848{
1849 enum nl80211_channel_type channel_type;
1850
Johannes Berg074d46d2012-03-15 19:45:16 +01001851 if (!ht_oper)
Alexander Simon42e7aa72011-10-26 14:47:26 -07001852 return NL80211_CHAN_NO_HT;
1853
Johannes Berg074d46d2012-03-15 19:45:16 +01001854 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
Alexander Simon42e7aa72011-10-26 14:47:26 -07001855 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1856 channel_type = NL80211_CHAN_HT20;
1857 break;
1858 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1859 channel_type = NL80211_CHAN_HT40PLUS;
1860 break;
1861 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1862 channel_type = NL80211_CHAN_HT40MINUS;
1863 break;
1864 default:
1865 channel_type = NL80211_CHAN_NO_HT;
1866 }
1867
1868 return channel_type;
1869}
1870
Johannes Bergfc8a7322012-06-28 10:33:25 +02001871int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02001872 struct sk_buff *skb, bool need_basic,
1873 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03001874{
Arik Nemtsov768db342011-09-28 14:12:51 +03001875 struct ieee80211_local *local = sdata->local;
1876 struct ieee80211_supported_band *sband;
1877 int rate;
1878 u8 i, rates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02001879 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03001880
Johannes Berg6b778632012-07-23 14:53:27 +02001881 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03001882 rates = sband->n_bitrates;
1883 if (rates > 8)
1884 rates = 8;
1885
1886 if (skb_tailroom(skb) < rates + 2)
1887 return -ENOMEM;
1888
1889 pos = skb_put(skb, rates + 2);
1890 *pos++ = WLAN_EID_SUPP_RATES;
1891 *pos++ = rates;
1892 for (i = 0; i < rates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001893 u8 basic = 0;
1894 if (need_basic && basic_rates & BIT(i))
1895 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03001896 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001897 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03001898 }
1899
1900 return 0;
1901}
1902
Johannes Bergfc8a7322012-06-28 10:33:25 +02001903int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
Johannes Berg6b778632012-07-23 14:53:27 +02001904 struct sk_buff *skb, bool need_basic,
1905 enum ieee80211_band band)
Arik Nemtsov768db342011-09-28 14:12:51 +03001906{
Arik Nemtsov768db342011-09-28 14:12:51 +03001907 struct ieee80211_local *local = sdata->local;
1908 struct ieee80211_supported_band *sband;
1909 int rate;
1910 u8 i, exrates, *pos;
Johannes Bergfc8a7322012-06-28 10:33:25 +02001911 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
Arik Nemtsov768db342011-09-28 14:12:51 +03001912
Johannes Berg6b778632012-07-23 14:53:27 +02001913 sband = local->hw.wiphy->bands[band];
Arik Nemtsov768db342011-09-28 14:12:51 +03001914 exrates = sband->n_bitrates;
1915 if (exrates > 8)
1916 exrates -= 8;
1917 else
1918 exrates = 0;
1919
1920 if (skb_tailroom(skb) < exrates + 2)
1921 return -ENOMEM;
1922
1923 if (exrates) {
1924 pos = skb_put(skb, exrates + 2);
1925 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1926 *pos++ = exrates;
1927 for (i = 8; i < sband->n_bitrates; i++) {
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001928 u8 basic = 0;
1929 if (need_basic && basic_rates & BIT(i))
1930 basic = 0x80;
Arik Nemtsov768db342011-09-28 14:12:51 +03001931 rate = sband->bitrates[i].bitrate;
Ashok Nagarajan657c3e02012-04-02 21:21:20 -07001932 *pos++ = basic | (u8) (rate / 5);
Arik Nemtsov768db342011-09-28 14:12:51 +03001933 }
1934 }
1935 return 0;
1936}
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07001937
1938int ieee80211_ave_rssi(struct ieee80211_vif *vif)
1939{
1940 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1941 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1942
Wey-Yi Guybe6bcab2012-04-23 09:30:32 -07001943 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
1944 /* non-managed type inferfaces */
1945 return 0;
1946 }
Wey-Yi Guy1dae27f2012-04-13 12:02:57 -07001947 return ifmgd->ave_beacon_signal;
1948}
Wey-Yi Guy0d8a0a12012-04-20 11:57:00 -07001949EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);