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Johannes Bergc2d15602007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040016#include <linux/export.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020017#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
20#include <linux/etherdevice.h>
21#include <linux/if_arp.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020022#include <linux/bitmap.h>
Johannes Bergdd769862011-11-18 16:54:50 +010023#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020025#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010026#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020027
28#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020029#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040030#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010031#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020032#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020033#include "led.h"
Johannes Bergfffd0932009-07-08 14:22:54 +020034#include "wep.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020035
36/* privid for wiphys to determine whether they belong to us or not */
37void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
38
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080039struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
40{
41 struct ieee80211_local *local;
42 BUG_ON(!wiphy);
43
44 local = wiphy_priv(wiphy);
45 return &local->hw;
46}
47EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020048
Ron Rindjunsky71364712007-12-25 17:00:36 +020049u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020050 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020051{
Harvey Harrisona494bb12008-06-11 14:21:58 -070052 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020053
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020054 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
55 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020056 return NULL;
57
Harvey Harrisona494bb12008-06-11 14:21:58 -070058 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020059 if (len < 24) /* drop incorrect hdr len (data) */
60 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070061
62 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020063 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070064 if (ieee80211_has_tods(fc))
65 return hdr->addr1;
66 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020067 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070068
69 return hdr->addr3;
70 }
71
72 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020073 if (len < 24) /* drop incorrect hdr len (mgmt) */
74 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020075 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070076 }
77
78 if (ieee80211_is_ctl(fc)) {
79 if(ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020080 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070081
82 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020083 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020084 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020085 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020086 case NL80211_IFTYPE_AP:
87 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020088 return hdr->addr1;
89 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070090 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020091 }
92 }
Johannes Bergc2d15602007-07-27 15:43:23 +020093 }
94
95 return NULL;
96}
97
Johannes Berg5cf121c2008-02-25 16:27:43 +010098void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +020099{
Johannes Berg252b86c2011-11-16 15:28:55 +0100100 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100101 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200102
Johannes Berg252b86c2011-11-16 15:28:55 +0100103 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100104 hdr = (struct ieee80211_hdr *) skb->data;
105 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
Johannes Berg252b86c2011-11-16 15:28:55 +0100106 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200107}
108
109int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
110 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
Johannes Berg8318d782008-01-24 19:38:38 +0100123 if (local->hw.conf.channel->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,
Johannes Berg8318d782008-01-24 19:38:38 +0100165 size_t frame_len,
166 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200167{
168 struct ieee80211_local *local = hw_to_local(hw);
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
182 dur = ieee80211_frame_duration(local, 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
201 sband = local->hw.wiphy->bands[local->hw.conf.channel->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 */
Johannes Berg8318d782008-01-24 19:38:38 +0100216 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200217 erp, short_preamble);
218 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100219 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200220 erp, short_preamble);
221 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100222 dur += ieee80211_frame_duration(local, 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
242 sband = local->hw.wiphy->bands[local->hw.conf.channel->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 */
Johannes Berg8318d782008-01-24 19:38:38 +0100256 dur = ieee80211_frame_duration(local, 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 */
Johannes Berg8318d782008-01-24 19:38:38 +0100260 dur += ieee80211_frame_duration(local, 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
Kalle Valoce7c9112008-12-18 23:35:20 +0200268static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
269 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200270{
271 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100272 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200273
Johannes Bergb5878a22010-04-07 16:48:40 +0200274 trace_wake_queue(local, queue, reason);
275
Johannes Berge4e72fb2009-03-23 17:28:42 +0100276 if (WARN_ON(queue >= hw->queues))
277 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200278
Johannes Berg96f5e662009-02-12 00:51:53 +0100279 __clear_bit(reason, &local->queue_stop_reasons[queue]);
280
281 if (local->queue_stop_reasons[queue] != 0)
282 /* someone still has this queue stopped */
283 return;
284
Johannes Berg7236fe22010-03-22 13:42:43 -0700285 if (skb_queue_empty(&local->pending[queue])) {
286 rcu_read_lock();
Johannes Berg5b714c62010-08-27 13:45:28 +0200287 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
288 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
289 continue;
Johannes Berg2337db82010-08-27 13:36:49 +0200290 netif_wake_subqueue(sdata->dev, queue);
Johannes Berg5b714c62010-08-27 13:45:28 +0200291 }
Johannes Berg7236fe22010-03-22 13:42:43 -0700292 rcu_read_unlock();
293 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200294 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200295}
Kalle Valoce7c9112008-12-18 23:35:20 +0200296
Johannes Berg96f5e662009-02-12 00:51:53 +0100297void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
298 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200299{
300 struct ieee80211_local *local = hw_to_local(hw);
301 unsigned long flags;
302
303 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
304 __ieee80211_wake_queue(hw, queue, reason);
305 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
306}
307
308void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
309{
310 ieee80211_wake_queue_by_reason(hw, queue,
311 IEEE80211_QUEUE_STOP_REASON_DRIVER);
312}
Johannes Bergc2d15602007-07-27 15:43:23 +0200313EXPORT_SYMBOL(ieee80211_wake_queue);
314
Kalle Valoce7c9112008-12-18 23:35:20 +0200315static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
316 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200317{
318 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100319 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200320
Johannes Bergb5878a22010-04-07 16:48:40 +0200321 trace_stop_queue(local, queue, reason);
322
Johannes Berge4e72fb2009-03-23 17:28:42 +0100323 if (WARN_ON(queue >= hw->queues))
324 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100325
Johannes Berg2a577d92009-03-23 17:28:37 +0100326 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100327
328 rcu_read_lock();
329 list_for_each_entry_rcu(sdata, &local->interfaces, list)
Johannes Berg2337db82010-08-27 13:36:49 +0200330 netif_stop_subqueue(sdata->dev, queue);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100331 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200332}
Kalle Valoce7c9112008-12-18 23:35:20 +0200333
Johannes Berg96f5e662009-02-12 00:51:53 +0100334void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
335 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200336{
337 struct ieee80211_local *local = hw_to_local(hw);
338 unsigned long flags;
339
340 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
341 __ieee80211_stop_queue(hw, queue, reason);
342 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
343}
344
345void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
346{
347 ieee80211_stop_queue_by_reason(hw, queue,
348 IEEE80211_QUEUE_STOP_REASON_DRIVER);
349}
Johannes Bergc2d15602007-07-27 15:43:23 +0200350EXPORT_SYMBOL(ieee80211_stop_queue);
351
Johannes Berg8f77f382009-06-07 21:58:37 +0200352void ieee80211_add_pending_skb(struct ieee80211_local *local,
353 struct sk_buff *skb)
354{
355 struct ieee80211_hw *hw = &local->hw;
356 unsigned long flags;
357 int queue = skb_get_queue_mapping(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200358 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
359
360 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200361 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200362 return;
363 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200364
365 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
366 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200367 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200368 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
369 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
370}
371
Johannes Bergb0b97a82011-09-29 16:04:30 +0200372void ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
373 struct sk_buff_head *skbs,
374 void (*fn)(void *data), void *data)
Johannes Berg8f77f382009-06-07 21:58:37 +0200375{
376 struct ieee80211_hw *hw = &local->hw;
377 struct sk_buff *skb;
378 unsigned long flags;
Johannes Bergb0b97a82011-09-29 16:04:30 +0200379 int queue, i;
Johannes Berg8f77f382009-06-07 21:58:37 +0200380
381 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
382 for (i = 0; i < hw->queues; i++)
383 __ieee80211_stop_queue(hw, i,
384 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
385
386 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200387 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
388
389 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200390 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200391 continue;
392 }
393
Johannes Berg8f77f382009-06-07 21:58:37 +0200394 queue = skb_get_queue_mapping(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200395 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200396 }
397
Johannes Berg50a94322010-11-16 11:50:28 -0800398 if (fn)
399 fn(data);
400
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200401 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200402 __ieee80211_wake_queue(hw, i,
403 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg8f77f382009-06-07 21:58:37 +0200404 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg8f77f382009-06-07 21:58:37 +0200405}
406
Johannes Bergb0b97a82011-09-29 16:04:30 +0200407void ieee80211_add_pending_skbs(struct ieee80211_local *local,
408 struct sk_buff_head *skbs)
Johannes Berg50a94322010-11-16 11:50:28 -0800409{
Johannes Bergb0b97a82011-09-29 16:04:30 +0200410 ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
Johannes Berg50a94322010-11-16 11:50:28 -0800411}
412
Kalle Valoce7c9112008-12-18 23:35:20 +0200413void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
414 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200415{
Kalle Valoce7c9112008-12-18 23:35:20 +0200416 struct ieee80211_local *local = hw_to_local(hw);
417 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200418 int i;
419
Kalle Valoce7c9112008-12-18 23:35:20 +0200420 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
421
Johannes Berg96f5e662009-02-12 00:51:53 +0100422 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200423 __ieee80211_stop_queue(hw, i, reason);
424
425 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
426}
427
428void ieee80211_stop_queues(struct ieee80211_hw *hw)
429{
430 ieee80211_stop_queues_by_reason(hw,
431 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200432}
433EXPORT_SYMBOL(ieee80211_stop_queues);
434
Tomas Winkler92ab8532008-07-24 21:02:04 +0300435int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
436{
437 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200438 unsigned long flags;
439 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100440
Johannes Berge4e72fb2009-03-23 17:28:42 +0100441 if (WARN_ON(queue >= hw->queues))
442 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100443
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200444 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
445 ret = !!local->queue_stop_reasons[queue];
446 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
447 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300448}
449EXPORT_SYMBOL(ieee80211_queue_stopped);
450
Kalle Valoce7c9112008-12-18 23:35:20 +0200451void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
452 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200453{
Kalle Valoce7c9112008-12-18 23:35:20 +0200454 struct ieee80211_local *local = hw_to_local(hw);
455 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200456 int i;
457
Kalle Valoce7c9112008-12-18 23:35:20 +0200458 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
459
Johannes Berge4e72fb2009-03-23 17:28:42 +0100460 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200461 __ieee80211_wake_queue(hw, i, reason);
462
463 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
464}
465
466void ieee80211_wake_queues(struct ieee80211_hw *hw)
467{
468 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200469}
470EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100471
Johannes Berg32bfd352007-12-19 01:31:26 +0100472void ieee80211_iterate_active_interfaces(
473 struct ieee80211_hw *hw,
474 void (*iterator)(void *data, u8 *mac,
475 struct ieee80211_vif *vif),
476 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100477{
478 struct ieee80211_local *local = hw_to_local(hw);
479 struct ieee80211_sub_if_data *sdata;
480
Johannes Bergc771c9d2009-01-23 22:54:03 +0100481 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200482
483 list_for_each_entry(sdata, &local->interfaces, list) {
484 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200485 case NL80211_IFTYPE_MONITOR:
486 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200487 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200488 default:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200489 break;
490 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100491 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100492 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200493 &sdata->vif);
494 }
495
Johannes Bergc771c9d2009-01-23 22:54:03 +0100496 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200497}
498EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
499
500void ieee80211_iterate_active_interfaces_atomic(
501 struct ieee80211_hw *hw,
502 void (*iterator)(void *data, u8 *mac,
503 struct ieee80211_vif *vif),
504 void *data)
505{
506 struct ieee80211_local *local = hw_to_local(hw);
507 struct ieee80211_sub_if_data *sdata;
508
Johannes Berge38bad42007-11-28 10:55:32 +0100509 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100510
Johannes Berge38bad42007-11-28 10:55:32 +0100511 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100512 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200513 case NL80211_IFTYPE_MONITOR:
514 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100515 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200516 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100517 break;
518 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100519 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100520 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100521 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100522 }
Johannes Berge38bad42007-11-28 10:55:32 +0100523
524 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100525}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200526EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200527
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400528/*
529 * Nothing should have been stuffed into the workqueue during
530 * the suspend->resume cycle. If this WARN is seen then there
531 * is a bug with either the driver suspend or something in
532 * mac80211 stuffing into the workqueue which we haven't yet
533 * cleared during mac80211's suspend cycle.
534 */
535static bool ieee80211_can_queue_work(struct ieee80211_local *local)
536{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100537 if (WARN(local->suspended && !local->resuming,
538 "queueing ieee80211 work while going to suspend\n"))
539 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400540
541 return true;
542}
543
544void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
545{
546 struct ieee80211_local *local = hw_to_local(hw);
547
548 if (!ieee80211_can_queue_work(local))
549 return;
550
551 queue_work(local->workqueue, work);
552}
553EXPORT_SYMBOL(ieee80211_queue_work);
554
555void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
556 struct delayed_work *dwork,
557 unsigned long delay)
558{
559 struct ieee80211_local *local = hw_to_local(hw);
560
561 if (!ieee80211_can_queue_work(local))
562 return;
563
564 queue_delayed_work(local->workqueue, dwork, delay);
565}
566EXPORT_SYMBOL(ieee80211_queue_delayed_work);
567
Johannes Bergdd769862011-11-18 16:54:50 +0100568u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
569 struct ieee802_11_elems *elems,
570 u64 filter, u32 crc)
571{
572 size_t left = len;
573 u8 *pos = start;
574 bool calc_crc = filter != 0;
575
576 memset(elems, 0, sizeof(*elems));
577 elems->ie_start = start;
578 elems->total_len = len;
579
580 while (left >= 2) {
581 u8 id, elen;
582
583 id = *pos++;
584 elen = *pos++;
585 left -= 2;
586
587 if (elen > left)
588 break;
589
590 if (calc_crc && id < 64 && (filter & (1ULL << id)))
591 crc = crc32_be(crc, pos - 2, elen + 2);
592
593 switch (id) {
594 case WLAN_EID_SSID:
595 elems->ssid = pos;
596 elems->ssid_len = elen;
597 break;
598 case WLAN_EID_SUPP_RATES:
599 elems->supp_rates = pos;
600 elems->supp_rates_len = elen;
601 break;
602 case WLAN_EID_FH_PARAMS:
603 elems->fh_params = pos;
604 elems->fh_params_len = elen;
605 break;
606 case WLAN_EID_DS_PARAMS:
607 elems->ds_params = pos;
608 elems->ds_params_len = elen;
609 break;
610 case WLAN_EID_CF_PARAMS:
611 elems->cf_params = pos;
612 elems->cf_params_len = elen;
613 break;
614 case WLAN_EID_TIM:
615 if (elen >= sizeof(struct ieee80211_tim_ie)) {
616 elems->tim = (void *)pos;
617 elems->tim_len = elen;
618 }
619 break;
620 case WLAN_EID_IBSS_PARAMS:
621 elems->ibss_params = pos;
622 elems->ibss_params_len = elen;
623 break;
624 case WLAN_EID_CHALLENGE:
625 elems->challenge = pos;
626 elems->challenge_len = elen;
627 break;
628 case WLAN_EID_VENDOR_SPECIFIC:
629 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
630 pos[2] == 0xf2) {
631 /* Microsoft OUI (00:50:F2) */
632
633 if (calc_crc)
634 crc = crc32_be(crc, pos - 2, elen + 2);
635
636 if (pos[3] == 1) {
637 /* OUI Type 1 - WPA IE */
638 elems->wpa = pos;
639 elems->wpa_len = elen;
640 } else if (elen >= 5 && pos[3] == 2) {
641 /* OUI Type 2 - WMM IE */
642 if (pos[4] == 0) {
643 elems->wmm_info = pos;
644 elems->wmm_info_len = elen;
645 } else if (pos[4] == 1) {
646 elems->wmm_param = pos;
647 elems->wmm_param_len = elen;
648 }
649 }
650 }
651 break;
652 case WLAN_EID_RSN:
653 elems->rsn = pos;
654 elems->rsn_len = elen;
655 break;
656 case WLAN_EID_ERP_INFO:
657 elems->erp_info = pos;
658 elems->erp_info_len = elen;
659 break;
660 case WLAN_EID_EXT_SUPP_RATES:
661 elems->ext_supp_rates = pos;
662 elems->ext_supp_rates_len = elen;
663 break;
664 case WLAN_EID_HT_CAPABILITY:
665 if (elen >= sizeof(struct ieee80211_ht_cap))
666 elems->ht_cap_elem = (void *)pos;
667 break;
668 case WLAN_EID_HT_INFORMATION:
669 if (elen >= sizeof(struct ieee80211_ht_info))
670 elems->ht_info_elem = (void *)pos;
671 break;
672 case WLAN_EID_MESH_ID:
673 elems->mesh_id = pos;
674 elems->mesh_id_len = elen;
675 break;
676 case WLAN_EID_MESH_CONFIG:
677 if (elen >= sizeof(struct ieee80211_meshconf_ie))
678 elems->mesh_config = (void *)pos;
679 break;
680 case WLAN_EID_PEER_MGMT:
681 elems->peering = pos;
682 elems->peering_len = elen;
683 break;
684 case WLAN_EID_PREQ:
685 elems->preq = pos;
686 elems->preq_len = elen;
687 break;
688 case WLAN_EID_PREP:
689 elems->prep = pos;
690 elems->prep_len = elen;
691 break;
692 case WLAN_EID_PERR:
693 elems->perr = pos;
694 elems->perr_len = elen;
695 break;
696 case WLAN_EID_RANN:
697 if (elen >= sizeof(struct ieee80211_rann_ie))
698 elems->rann = (void *)pos;
699 break;
700 case WLAN_EID_CHANNEL_SWITCH:
701 elems->ch_switch_elem = pos;
702 elems->ch_switch_elem_len = elen;
703 break;
704 case WLAN_EID_QUIET:
705 if (!elems->quiet_elem) {
706 elems->quiet_elem = pos;
707 elems->quiet_elem_len = elen;
708 }
709 elems->num_of_quiet_elem++;
710 break;
711 case WLAN_EID_COUNTRY:
712 elems->country_elem = pos;
713 elems->country_elem_len = elen;
714 break;
715 case WLAN_EID_PWR_CONSTRAINT:
716 elems->pwr_constr_elem = pos;
717 elems->pwr_constr_elem_len = elen;
718 break;
719 case WLAN_EID_TIMEOUT_INTERVAL:
720 elems->timeout_int = pos;
721 elems->timeout_int_len = elen;
722 break;
723 default:
724 break;
725 }
726
727 left -= elen;
728 pos += elen;
729 }
730
731 return crc;
732}
733
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200734void ieee802_11_parse_elems(u8 *start, size_t len,
735 struct ieee802_11_elems *elems)
736{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200737 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
738}
739
Johannes Berg3abead52012-03-02 15:56:59 +0100740void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
741 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200742{
743 struct ieee80211_local *local = sdata->local;
744 struct ieee80211_tx_queue_params qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200745 int queue;
746 bool use_11b;
747 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200748
749 if (!local->ops->conf_tx)
750 return;
751
752 memset(&qparam, 0, sizeof(qparam));
753
Johannes Bergaa837e12009-05-07 16:16:24 +0200754 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
755 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe102008-09-09 12:56:01 +0200756
Johannes Berg005e4722012-02-26 11:24:35 +0100757 for (queue = 0; queue < local->hw.queues; queue++) {
Johannes Bergaa837e12009-05-07 16:16:24 +0200758 /* Set defaults according to 802.11-2007 Table 7-37 */
759 aCWmax = 1023;
760 if (use_11b)
761 aCWmin = 31;
762 else
763 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200764
Johannes Bergaa837e12009-05-07 16:16:24 +0200765 switch (queue) {
766 case 3: /* AC_BK */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200767 qparam.cw_max = aCWmax;
768 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200769 qparam.txop = 0;
770 qparam.aifs = 7;
771 break;
772 default: /* never happens but let's not leave undefined */
773 case 2: /* AC_BE */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200774 qparam.cw_max = aCWmax;
775 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200776 qparam.txop = 0;
777 qparam.aifs = 3;
778 break;
779 case 1: /* AC_VI */
780 qparam.cw_max = aCWmin;
781 qparam.cw_min = (aCWmin + 1) / 2 - 1;
782 if (use_11b)
783 qparam.txop = 6016/32;
784 else
785 qparam.txop = 3008/32;
786 qparam.aifs = 2;
787 break;
788 case 0: /* AC_VO */
789 qparam.cw_max = (aCWmin + 1) / 2 - 1;
790 qparam.cw_min = (aCWmin + 1) / 4 - 1;
791 if (use_11b)
792 qparam.txop = 3264/32;
793 else
794 qparam.txop = 1504/32;
795 qparam.aifs = 2;
796 break;
797 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200798
Kalle Valoab133152010-01-12 10:42:31 +0200799 qparam.uapsd = false;
800
Eliad Pellerf6f3def2011-09-25 20:06:54 +0300801 sdata->tx_conf[queue] = qparam;
802 drv_conf_tx(local, sdata, queue, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +0200803 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200804
805 /* after reinitialize QoS TX queues setting to default,
806 * disable QoS at all */
Sujithd9734972010-07-23 10:47:11 +0530807
808 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
809 sdata->vif.bss_conf.qos =
810 sdata->vif.type != NL80211_IFTYPE_STATION;
Johannes Berg3abead52012-03-02 15:56:59 +0100811 if (bss_notify)
812 ieee80211_bss_info_change_notify(sdata,
813 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +0530814 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200815}
Johannes Berge50db652008-09-09 15:07:09 +0200816
Johannes Berg46900292009-02-15 12:44:28 +0100817void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
818 const size_t supp_rates_len,
819 const u8 *supp_rates)
820{
821 struct ieee80211_local *local = sdata->local;
822 int i, have_higher_than_11mbit = 0;
823
824 /* cf. IEEE 802.11 9.2.12 */
825 for (i = 0; i < supp_rates_len; i++)
826 if ((supp_rates[i] & 0x7f) * 5 > 110)
827 have_higher_than_11mbit = 1;
828
829 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
830 have_higher_than_11mbit)
831 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
832 else
833 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
834
Johannes Berg3abead52012-03-02 15:56:59 +0100835 ieee80211_set_wmm_default(sdata, true);
Johannes Berg46900292009-02-15 12:44:28 +0100836}
837
Johannes Berg881d9482009-01-21 15:13:48 +0100838u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200839 enum ieee80211_band band)
840{
841 struct ieee80211_supported_band *sband;
842 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100843 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200844 enum ieee80211_rate_flags mandatory_flag;
845 int i;
846
847 sband = local->hw.wiphy->bands[band];
848 if (!sband) {
849 WARN_ON(1);
850 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
851 }
852
853 if (band == IEEE80211_BAND_2GHZ)
854 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
855 else
856 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
857
858 bitrates = sband->bitrates;
859 mandatory_rates = 0;
860 for (i = 0; i < sband->n_bitrates; i++)
861 if (bitrates[i].flags & mandatory_flag)
862 mandatory_rates |= BIT(i);
863 return mandatory_rates;
864}
Johannes Berg46900292009-02-15 12:44:28 +0100865
866void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
867 u16 transaction, u16 auth_alg,
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100868 u8 *extra, size_t extra_len, const u8 *da,
869 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100870{
871 struct ieee80211_local *local = sdata->local;
872 struct sk_buff *skb;
873 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +0200874 int err;
Johannes Berg46900292009-02-15 12:44:28 +0100875
876 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200877 sizeof(*mgmt) + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -0700878 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +0100879 return;
Joe Perchesd15b8452011-08-29 14:17:31 -0700880
Johannes Berg46900292009-02-15 12:44:28 +0100881 skb_reserve(skb, local->hw.extra_tx_headroom);
882
883 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
884 memset(mgmt, 0, 24 + 6);
885 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
886 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100887 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100888 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100889 memcpy(mgmt->bssid, bssid, ETH_ALEN);
890 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
891 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
892 mgmt->u.auth.status_code = cpu_to_le16(0);
893 if (extra)
894 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100895
Johannes Bergfffd0932009-07-08 14:22:54 +0200896 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
897 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
898 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
899 WARN_ON(err);
900 }
901
Johannes Berg62ae67b2009-11-18 18:42:05 +0100902 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
903 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +0100904}
905
Johannes Bergde95a542009-04-01 11:58:36 +0200906int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec582009-10-27 20:59:55 +0100907 const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +0300908 enum ieee80211_band band, u32 rate_mask,
909 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +0200910{
911 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100912 u8 *pos;
913 size_t offset = 0, noffset;
914 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300915 u8 rates[32];
916 int num_rates;
917 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200918
Johannes Berg4d36ec582009-10-27 20:59:55 +0100919 sband = local->hw.wiphy->bands[band];
Johannes Bergde95a542009-04-01 11:58:36 +0200920
921 pos = buffer;
922
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300923 num_rates = 0;
924 for (i = 0; i < sband->n_bitrates; i++) {
925 if ((BIT(i) & rate_mask) == 0)
926 continue; /* skip rate */
927 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
928 }
929
930 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +0100931
Johannes Bergde95a542009-04-01 11:58:36 +0200932 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100933 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300934 memcpy(pos, rates, supp_rates_len);
935 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200936
Johannes Berg8e664fb2009-12-23 13:15:38 +0100937 /* insert "request information" if in custom IEs */
938 if (ie && ie_len) {
939 static const u8 before_extrates[] = {
940 WLAN_EID_SSID,
941 WLAN_EID_SUPP_RATES,
942 WLAN_EID_REQUEST,
943 };
944 noffset = ieee80211_ie_split(ie, ie_len,
945 before_extrates,
946 ARRAY_SIZE(before_extrates),
947 offset);
948 memcpy(pos, ie + offset, noffset - offset);
949 pos += noffset - offset;
950 offset = noffset;
951 }
Johannes Bergde95a542009-04-01 11:58:36 +0200952
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300953 ext_rates_len = num_rates - supp_rates_len;
954 if (ext_rates_len > 0) {
Johannes Berg8e664fb2009-12-23 13:15:38 +0100955 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300956 *pos++ = ext_rates_len;
957 memcpy(pos, rates + supp_rates_len, ext_rates_len);
958 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100959 }
960
Jouni Malinen651b5222010-08-28 19:37:51 +0300961 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
962 *pos++ = WLAN_EID_DS_PARAMS;
963 *pos++ = 1;
964 *pos++ = channel;
965 }
966
Johannes Berg8e664fb2009-12-23 13:15:38 +0100967 /* insert custom IEs that go before HT */
968 if (ie && ie_len) {
969 static const u8 before_ht[] = {
970 WLAN_EID_SSID,
971 WLAN_EID_SUPP_RATES,
972 WLAN_EID_REQUEST,
973 WLAN_EID_EXT_SUPP_RATES,
974 WLAN_EID_DS_PARAMS,
975 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
976 };
977 noffset = ieee80211_ie_split(ie, ie_len,
978 before_ht, ARRAY_SIZE(before_ht),
979 offset);
980 memcpy(pos, ie + offset, noffset - offset);
981 pos += noffset - offset;
982 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +0200983 }
984
Alexander Simon42e7aa72011-10-26 14:47:26 -0700985 if (sband->ht_cap.ht_supported)
Ben Greearef96a8422011-11-18 11:32:00 -0800986 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
987 sband->ht_cap.cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200988
Johannes Bergde95a542009-04-01 11:58:36 +0200989 /*
990 * If adding more here, adjust code in main.c
991 * that calculates local->scan_ies_len.
992 */
993
Johannes Berg8e664fb2009-12-23 13:15:38 +0100994 /* add any remaining custom IEs */
995 if (ie && ie_len) {
996 noffset = ie_len;
997 memcpy(pos, ie + offset, noffset - offset);
998 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +0200999 }
1000
1001 return pos - buffer;
1002}
1003
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001004struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001005 u8 *dst, u32 ratemask,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001006 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001007 const u8 *ie, size_t ie_len,
1008 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001009{
1010 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001011 struct sk_buff *skb;
1012 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001013 size_t buf_len;
1014 u8 *buf;
Jouni Malinen651b5222010-08-28 19:37:51 +03001015 u8 chan;
Johannes Berg46900292009-02-15 12:44:28 +01001016
Kalle Valo7c12ce82010-01-05 20:16:44 +02001017 /* FIXME: come up with a proper value */
1018 buf = kmalloc(200 + ie_len, GFP_KERNEL);
Joe Perchesd15b8452011-08-29 14:17:31 -07001019 if (!buf)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001020 return NULL;
Johannes Berg46900292009-02-15 12:44:28 +01001021
Paul Stewarta806c552011-06-23 09:00:11 -08001022 /*
1023 * Do not send DS Channel parameter for directed probe requests
1024 * in order to maximize the chance that we get a response. Some
1025 * badly-behaved APs don't respond when this parameter is included.
1026 */
1027 if (directed)
1028 chan = 0;
1029 else
1030 chan = ieee80211_frequency_to_channel(
1031 local->hw.conf.channel->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001032
Kalle Valo7c12ce82010-01-05 20:16:44 +02001033 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001034 local->hw.conf.channel->band,
Johannes Berg85a237f2011-07-18 18:08:36 +02001035 ratemask, chan);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001036
1037 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1038 ssid, ssid_len,
1039 buf, buf_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001040 if (!skb)
1041 goto out;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001042
Johannes Berg46900292009-02-15 12:44:28 +01001043 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001044 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001045 memcpy(mgmt->da, dst, ETH_ALEN);
1046 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001047 }
Johannes Berg46900292009-02-15 12:44:28 +01001048
Johannes Berg62ae67b2009-11-18 18:42:05 +01001049 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001050
1051 out:
Ming Lei145b6d12010-01-15 21:44:21 +08001052 kfree(buf);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001053
1054 return skb;
1055}
1056
1057void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1058 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001059 const u8 *ie, size_t ie_len,
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301060 u32 ratemask, bool directed, bool no_cck)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001061{
1062 struct sk_buff *skb;
1063
Johannes Berg85a237f2011-07-18 18:08:36 +02001064 skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
1065 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301066 if (skb) {
1067 if (no_cck)
1068 IEEE80211_SKB_CB(skb)->flags |=
1069 IEEE80211_TX_CTL_NO_CCK_RATE;
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001070 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301071 }
Johannes Berg46900292009-02-15 12:44:28 +01001072}
1073
1074u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1075 struct ieee802_11_elems *elems,
1076 enum ieee80211_band band)
1077{
1078 struct ieee80211_supported_band *sband;
1079 struct ieee80211_rate *bitrates;
1080 size_t num_rates;
1081 u32 supp_rates;
1082 int i, j;
1083 sband = local->hw.wiphy->bands[band];
1084
1085 if (!sband) {
1086 WARN_ON(1);
1087 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1088 }
1089
1090 bitrates = sband->bitrates;
1091 num_rates = sband->n_bitrates;
1092 supp_rates = 0;
1093 for (i = 0; i < elems->supp_rates_len +
1094 elems->ext_supp_rates_len; i++) {
1095 u8 rate = 0;
1096 int own_rate;
1097 if (i < elems->supp_rates_len)
1098 rate = elems->supp_rates[i];
1099 else if (elems->ext_supp_rates)
1100 rate = elems->ext_supp_rates
1101 [i - elems->supp_rates_len];
1102 own_rate = 5 * (rate & 0x7f);
1103 for (j = 0; j < num_rates; j++)
1104 if (bitrates[j].bitrate == own_rate)
1105 supp_rates |= BIT(j);
1106 }
1107 return supp_rates;
1108}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001109
Johannes Berg84f6a012009-08-20 20:02:20 +02001110void ieee80211_stop_device(struct ieee80211_local *local)
1111{
1112 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001113 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001114
1115 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001116
1117 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001118 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001119}
1120
Johannes Bergf2753dd2009-04-14 10:09:24 +02001121int ieee80211_reconfig(struct ieee80211_local *local)
1122{
1123 struct ieee80211_hw *hw = &local->hw;
1124 struct ieee80211_sub_if_data *sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001125 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001126 int res, i;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001127
Johannes Bergeecc4802011-05-04 15:37:29 +02001128#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001129 if (local->suspended)
1130 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001131
Johannes Bergeecc4802011-05-04 15:37:29 +02001132 if (local->wowlan) {
1133 local->wowlan = false;
1134 res = drv_resume(local);
1135 if (res < 0) {
1136 local->resuming = false;
1137 return res;
1138 }
1139 if (res == 0)
1140 goto wake_up;
1141 WARN_ON(res > 1);
1142 /*
1143 * res is 1, which means the driver requested
1144 * to go through a regular reset on wakeup.
1145 */
1146 }
1147#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001148 /* everything else happens only if HW was up & running */
1149 if (!local->open_count)
1150 goto wake_up;
1151
1152 /*
1153 * Upon resume hardware can sometimes be goofy due to
1154 * various platform / driver / bus issues, so restarting
1155 * the device may at times not work immediately. Propagate
1156 * the error.
1157 */
1158 res = drv_start(local);
1159 if (res) {
1160 WARN(local->suspended, "Hardware became unavailable "
1161 "upon resume. This could be a software issue "
1162 "prior to suspend or a hardware issue.\n");
1163 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001164 }
1165
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301166 /* setup fragmentation threshold */
1167 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1168
1169 /* setup RTS threshold */
1170 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1171
1172 /* reset coverage class */
1173 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1174
Johannes Berg94f9b972011-07-14 16:48:54 +02001175 ieee80211_led_radio(local, true);
1176 ieee80211_mod_tpt_led_trig(local,
1177 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1178
Johannes Bergf2753dd2009-04-14 10:09:24 +02001179 /* add interfaces */
1180 list_for_each_entry(sdata, &local->interfaces, list) {
1181 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1182 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001183 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001184 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001185 }
1186
1187 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001188 mutex_lock(&local->sta_mtx);
1189 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergf09603a2012-01-20 13:55:21 +01001190 if (sta->uploaded) {
1191 enum ieee80211_sta_state state;
1192
Johannes Bergf09603a2012-01-20 13:55:21 +01001193 for (state = IEEE80211_STA_NOTEXIST;
1194 state < sta->sta_state - 1; state++)
1195 WARN_ON(drv_sta_state(local, sta->sdata, sta,
1196 state, state + 1));
1197 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001198 }
Johannes Berg34e89502010-02-03 13:59:58 +01001199 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001200
Eliad Peller2683d652011-07-14 20:29:42 +03001201 /* reconfigure tx conf */
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001202 list_for_each_entry(sdata, &local->interfaces, list) {
1203 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1204 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1205 !ieee80211_sdata_running(sdata))
1206 continue;
1207
1208 for (i = 0; i < hw->queues; i++)
1209 drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]);
1210 }
Eliad Peller2683d652011-07-14 20:29:42 +03001211
Johannes Bergf2753dd2009-04-14 10:09:24 +02001212 /* reconfigure hardware */
1213 ieee80211_hw_config(local, ~0);
1214
Johannes Bergf2753dd2009-04-14 10:09:24 +02001215 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001216
1217 /* Finally also reconfigure all the BSS information */
1218 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001219 u32 changed;
1220
Johannes Berg9607e6b2009-12-23 13:15:31 +01001221 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001222 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001223
1224 /* common change flags for all interface types */
1225 changed = BSS_CHANGED_ERP_CTS_PROT |
1226 BSS_CHANGED_ERP_PREAMBLE |
1227 BSS_CHANGED_ERP_SLOT |
1228 BSS_CHANGED_HT |
1229 BSS_CHANGED_BASIC_RATES |
1230 BSS_CHANGED_BEACON_INT |
1231 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001232 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001233 BSS_CHANGED_QOS |
1234 BSS_CHANGED_IDLE;
Johannes Bergac8dd502010-05-05 09:44:02 +02001235
Johannes Bergf2753dd2009-04-14 10:09:24 +02001236 switch (sdata->vif.type) {
1237 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001238 changed |= BSS_CHANGED_ASSOC |
1239 BSS_CHANGED_ARP_FILTER;
Eliad Pellera7b545f2011-02-08 18:43:19 +02001240 mutex_lock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001241 ieee80211_bss_info_change_notify(sdata, changed);
Eliad Pellera7b545f2011-02-08 18:43:19 +02001242 mutex_unlock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001243 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001244 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001245 changed |= BSS_CHANGED_IBSS;
1246 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001247 case NL80211_IFTYPE_AP:
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001248 changed |= BSS_CHANGED_SSID;
1249
1250 if (sdata->vif.type == NL80211_IFTYPE_AP)
1251 changed |= BSS_CHANGED_AP_PROBE_RESP;
1252
Arik Nemtsov78274932011-09-04 11:11:32 +03001253 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001254 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001255 changed |= BSS_CHANGED_BEACON |
1256 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001257 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001258 break;
1259 case NL80211_IFTYPE_WDS:
1260 break;
1261 case NL80211_IFTYPE_AP_VLAN:
1262 case NL80211_IFTYPE_MONITOR:
1263 /* ignore virtual */
1264 break;
1265 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001266 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001267 case NL80211_IFTYPE_P2P_CLIENT:
1268 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001269 WARN_ON(1);
1270 break;
1271 }
1272 }
1273
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001274 ieee80211_recalc_ps(local, -1);
1275
Johannes Berg2a419052010-06-10 10:21:29 +02001276 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001277 * The sta might be in psm against the ap (e.g. because
1278 * this was the state before a hw restart), so we
1279 * explicitly send a null packet in order to make sure
1280 * it'll sync against the ap (and get out of psm).
1281 */
1282 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1283 list_for_each_entry(sdata, &local->interfaces, list) {
1284 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1285 continue;
1286
1287 ieee80211_send_nullfunc(local, sdata, 0);
1288 }
1289 }
1290
1291 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001292 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1293 * sessions can be established after a resume.
1294 *
1295 * Also tear down aggregation sessions since reconfiguring
1296 * them in a hardware restart scenario is not easily done
1297 * right now, and the hardware will have lost information
1298 * about the sessions, but we and the AP still think they
1299 * are active. This is really a workaround though.
1300 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001301 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001302 mutex_lock(&local->sta_mtx);
1303
1304 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg53f73c02010-10-05 19:37:40 +02001305 ieee80211_sta_tear_down_BA_sessions(sta, true);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001306 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001307 }
Johannes Berg2a419052010-06-10 10:21:29 +02001308
1309 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001310 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001311
Johannes Bergf2753dd2009-04-14 10:09:24 +02001312 /* add back keys */
1313 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg9607e6b2009-12-23 13:15:31 +01001314 if (ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001315 ieee80211_enable_keys(sdata);
1316
Johannes Bergeecc4802011-05-04 15:37:29 +02001317 wake_up:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001318 ieee80211_wake_queues_by_reason(hw,
1319 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1320
Johannes Berg5bb644a2009-05-17 11:40:42 +02001321 /*
1322 * If this is for hw restart things are still running.
1323 * We may want to change that later, however.
1324 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001325 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001326 return 0;
1327
1328#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001329 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001330 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001331 mb();
1332 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001333
1334 list_for_each_entry(sdata, &local->interfaces, list) {
1335 switch(sdata->vif.type) {
1336 case NL80211_IFTYPE_STATION:
1337 ieee80211_sta_restart(sdata);
1338 break;
1339 case NL80211_IFTYPE_ADHOC:
1340 ieee80211_ibss_restart(sdata);
1341 break;
1342 case NL80211_IFTYPE_MESH_POINT:
1343 ieee80211_mesh_restart(sdata);
1344 break;
1345 default:
1346 break;
1347 }
1348 }
1349
Johannes Berg26d59532011-04-01 13:52:48 +02001350 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001351
Johannes Berg34e89502010-02-03 13:59:58 +01001352 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001353 list_for_each_entry(sta, &local->sta_list, list)
1354 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001355 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001356#else
1357 WARN_ON(1);
1358#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001359 return 0;
1360}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001361
Johannes Berg95acac62011-07-12 12:30:59 +02001362void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1363{
1364 struct ieee80211_sub_if_data *sdata;
1365 struct ieee80211_local *local;
1366 struct ieee80211_key *key;
1367
1368 if (WARN_ON(!vif))
1369 return;
1370
1371 sdata = vif_to_sdata(vif);
1372 local = sdata->local;
1373
1374 if (WARN_ON(!local->resuming))
1375 return;
1376
1377 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1378 return;
1379
1380 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1381
1382 mutex_lock(&local->key_mtx);
1383 list_for_each_entry(key, &sdata->key_list, list)
1384 key->flags |= KEY_FLAG_TAINTED;
1385 mutex_unlock(&local->key_mtx);
1386}
1387EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1388
Johannes Berg0f782312009-12-01 13:37:02 +01001389static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1390 enum ieee80211_smps_mode *smps_mode)
1391{
1392 if (ifmgd->associated) {
1393 *smps_mode = ifmgd->ap_smps;
1394
1395 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1396 if (ifmgd->powersave)
1397 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1398 else
1399 *smps_mode = IEEE80211_SMPS_OFF;
1400 }
1401
1402 return 1;
1403 }
1404
1405 return 0;
1406}
1407
1408/* must hold iflist_mtx */
Johannes Berg025e6be2010-10-05 10:41:47 +02001409void ieee80211_recalc_smps(struct ieee80211_local *local)
Johannes Berg0f782312009-12-01 13:37:02 +01001410{
1411 struct ieee80211_sub_if_data *sdata;
1412 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1413 int count = 0;
1414
Johannes Berg46a5eba2010-09-15 13:28:15 +02001415 lockdep_assert_held(&local->iflist_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001416
1417 /*
1418 * This function could be improved to handle multiple
1419 * interfaces better, but right now it makes any
1420 * non-station interfaces force SM PS to be turned
1421 * off. If there are multiple station interfaces it
1422 * could also use the best possible mode, e.g. if
1423 * one is in static and the other in dynamic then
1424 * dynamic is ok.
1425 */
1426
1427 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg26a58452010-08-27 12:35:55 +02001428 if (!ieee80211_sdata_running(sdata))
Johannes Berg0f782312009-12-01 13:37:02 +01001429 continue;
1430 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1431 goto set;
Johannes Berg025e6be2010-10-05 10:41:47 +02001432
1433 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
Johannes Berg0f782312009-12-01 13:37:02 +01001434
1435 if (count > 1) {
1436 smps_mode = IEEE80211_SMPS_OFF;
1437 break;
1438 }
1439 }
1440
1441 if (smps_mode == local->smps_mode)
1442 return;
1443
1444 set:
1445 local->smps_mode = smps_mode;
1446 /* changed flag is auto-detected for this */
1447 ieee80211_hw_config(local, 0);
1448}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001449
1450static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1451{
1452 int i;
1453
1454 for (i = 0; i < n_ids; i++)
1455 if (ids[i] == id)
1456 return true;
1457 return false;
1458}
1459
1460/**
1461 * ieee80211_ie_split - split an IE buffer according to ordering
1462 *
1463 * @ies: the IE buffer
1464 * @ielen: the length of the IE buffer
1465 * @ids: an array with element IDs that are allowed before
1466 * the split
1467 * @n_ids: the size of the element ID array
1468 * @offset: offset where to start splitting in the buffer
1469 *
1470 * This function splits an IE buffer by updating the @offset
1471 * variable to point to the location where the buffer should be
1472 * split.
1473 *
1474 * It assumes that the given IE buffer is well-formed, this
1475 * has to be guaranteed by the caller!
1476 *
1477 * It also assumes that the IEs in the buffer are ordered
1478 * correctly, if not the result of using this function will not
1479 * be ordered correctly either, i.e. it does no reordering.
1480 *
1481 * The function returns the offset where the next part of the
1482 * buffer starts, which may be @ielen if the entire (remainder)
1483 * of the buffer should be used.
1484 */
1485size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1486 const u8 *ids, int n_ids, size_t offset)
1487{
1488 size_t pos = offset;
1489
1490 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1491 pos += 2 + ies[pos + 1];
1492
1493 return pos;
1494}
1495
1496size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1497{
1498 size_t pos = offset;
1499
1500 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1501 pos += 2 + ies[pos + 1];
1502
1503 return pos;
1504}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001505
1506static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1507 int rssi_min_thold,
1508 int rssi_max_thold)
1509{
1510 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1511
1512 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1513 return;
1514
1515 /*
1516 * Scale up threshold values before storing it, as the RSSI averaging
1517 * algorithm uses a scaled up value as well. Change this scaling
1518 * factor if the RSSI averaging algorithm changes.
1519 */
1520 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1521 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1522}
1523
1524void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1525 int rssi_min_thold,
1526 int rssi_max_thold)
1527{
1528 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1529
1530 WARN_ON(rssi_min_thold == rssi_max_thold ||
1531 rssi_min_thold > rssi_max_thold);
1532
1533 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1534 rssi_max_thold);
1535}
1536EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1537
1538void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1539{
1540 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1541
1542 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1543}
1544EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03001545
Ben Greearef96a8422011-11-18 11:32:00 -08001546u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001547 u16 cap)
1548{
1549 __le16 tmp;
1550
1551 *pos++ = WLAN_EID_HT_CAPABILITY;
1552 *pos++ = sizeof(struct ieee80211_ht_cap);
1553 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1554
1555 /* capability flags */
1556 tmp = cpu_to_le16(cap);
1557 memcpy(pos, &tmp, sizeof(u16));
1558 pos += sizeof(u16);
1559
1560 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001561 *pos++ = ht_cap->ampdu_factor |
1562 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07001563 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1564
1565 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08001566 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1567 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001568
1569 /* extended capabilities */
1570 pos += sizeof(__le16);
1571
1572 /* BF capabilities */
1573 pos += sizeof(__le32);
1574
1575 /* antenna selection */
1576 pos += sizeof(u8);
1577
1578 return pos;
1579}
1580
1581u8 *ieee80211_ie_build_ht_info(u8 *pos,
1582 struct ieee80211_sta_ht_cap *ht_cap,
1583 struct ieee80211_channel *channel,
1584 enum nl80211_channel_type channel_type)
1585{
1586 struct ieee80211_ht_info *ht_info;
1587 /* Build HT Information */
1588 *pos++ = WLAN_EID_HT_INFORMATION;
1589 *pos++ = sizeof(struct ieee80211_ht_info);
1590 ht_info = (struct ieee80211_ht_info *)pos;
1591 ht_info->control_chan =
1592 ieee80211_frequency_to_channel(channel->center_freq);
1593 switch (channel_type) {
1594 case NL80211_CHAN_HT40MINUS:
1595 ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1596 break;
1597 case NL80211_CHAN_HT40PLUS:
1598 ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1599 break;
1600 case NL80211_CHAN_HT20:
1601 default:
1602 ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1603 break;
1604 }
1605 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
1606 ht_info->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01001607
1608 /*
1609 * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
1610 * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
1611 */
Alexander Simon42e7aa72011-10-26 14:47:26 -07001612 ht_info->operation_mode = 0x0000;
1613 ht_info->stbc_param = 0x0000;
1614
1615 /* It seems that Basic MCS set and Supported MCS set
1616 are identical for the first 10 bytes */
1617 memset(&ht_info->basic_set, 0, 16);
1618 memcpy(&ht_info->basic_set, &ht_cap->mcs, 10);
1619
1620 return pos + sizeof(struct ieee80211_ht_info);
1621}
1622
1623enum nl80211_channel_type
1624ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info)
1625{
1626 enum nl80211_channel_type channel_type;
1627
1628 if (!ht_info)
1629 return NL80211_CHAN_NO_HT;
1630
1631 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1632 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1633 channel_type = NL80211_CHAN_HT20;
1634 break;
1635 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1636 channel_type = NL80211_CHAN_HT40PLUS;
1637 break;
1638 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1639 channel_type = NL80211_CHAN_HT40MINUS;
1640 break;
1641 default:
1642 channel_type = NL80211_CHAN_NO_HT;
1643 }
1644
1645 return channel_type;
1646}
1647
Arik Nemtsov768db342011-09-28 14:12:51 +03001648int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
1649{
1650 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1651 struct ieee80211_local *local = sdata->local;
1652 struct ieee80211_supported_band *sband;
1653 int rate;
1654 u8 i, rates, *pos;
1655
1656 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1657 rates = sband->n_bitrates;
1658 if (rates > 8)
1659 rates = 8;
1660
1661 if (skb_tailroom(skb) < rates + 2)
1662 return -ENOMEM;
1663
1664 pos = skb_put(skb, rates + 2);
1665 *pos++ = WLAN_EID_SUPP_RATES;
1666 *pos++ = rates;
1667 for (i = 0; i < rates; i++) {
1668 rate = sband->bitrates[i].bitrate;
1669 *pos++ = (u8) (rate / 5);
1670 }
1671
1672 return 0;
1673}
1674
1675int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
1676{
1677 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1678 struct ieee80211_local *local = sdata->local;
1679 struct ieee80211_supported_band *sband;
1680 int rate;
1681 u8 i, exrates, *pos;
1682
1683 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1684 exrates = sband->n_bitrates;
1685 if (exrates > 8)
1686 exrates -= 8;
1687 else
1688 exrates = 0;
1689
1690 if (skb_tailroom(skb) < exrates + 2)
1691 return -ENOMEM;
1692
1693 if (exrates) {
1694 pos = skb_put(skb, exrates + 2);
1695 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1696 *pos++ = exrates;
1697 for (i = 8; i < sband->n_bitrates; i++) {
1698 rate = sband->bitrates[i].bitrate;
1699 *pos++ = (u8) (rate / 5);
1700 }
1701 }
1702 return 0;
1703}