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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;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800575 DECLARE_BITMAP(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100576
Paul Stewartfcff4f12012-02-23 17:59:53 -0800577 bitmap_zero(seen_elems, 256);
Johannes Bergdd769862011-11-18 16:54:50 +0100578 memset(elems, 0, sizeof(*elems));
579 elems->ie_start = start;
580 elems->total_len = len;
581
582 while (left >= 2) {
583 u8 id, elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800584 bool elem_parse_failed;
Johannes Bergdd769862011-11-18 16:54:50 +0100585
586 id = *pos++;
587 elen = *pos++;
588 left -= 2;
589
Paul Stewartfcff4f12012-02-23 17:59:53 -0800590 if (elen > left) {
591 elems->parse_error = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100592 break;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800593 }
594
595 if (id != WLAN_EID_VENDOR_SPECIFIC &&
596 id != WLAN_EID_QUIET &&
597 test_bit(id, seen_elems)) {
598 elems->parse_error = true;
599 left -= elen;
600 pos += elen;
601 continue;
602 }
Johannes Bergdd769862011-11-18 16:54:50 +0100603
604 if (calc_crc && id < 64 && (filter & (1ULL << id)))
605 crc = crc32_be(crc, pos - 2, elen + 2);
606
Paul Stewartfcff4f12012-02-23 17:59:53 -0800607 elem_parse_failed = false;
608
Johannes Bergdd769862011-11-18 16:54:50 +0100609 switch (id) {
610 case WLAN_EID_SSID:
611 elems->ssid = pos;
612 elems->ssid_len = elen;
613 break;
614 case WLAN_EID_SUPP_RATES:
615 elems->supp_rates = pos;
616 elems->supp_rates_len = elen;
617 break;
618 case WLAN_EID_FH_PARAMS:
619 elems->fh_params = pos;
620 elems->fh_params_len = elen;
621 break;
622 case WLAN_EID_DS_PARAMS:
623 elems->ds_params = pos;
624 elems->ds_params_len = elen;
625 break;
626 case WLAN_EID_CF_PARAMS:
627 elems->cf_params = pos;
628 elems->cf_params_len = elen;
629 break;
630 case WLAN_EID_TIM:
631 if (elen >= sizeof(struct ieee80211_tim_ie)) {
632 elems->tim = (void *)pos;
633 elems->tim_len = elen;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800634 } else
635 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100636 break;
637 case WLAN_EID_IBSS_PARAMS:
638 elems->ibss_params = pos;
639 elems->ibss_params_len = elen;
640 break;
641 case WLAN_EID_CHALLENGE:
642 elems->challenge = pos;
643 elems->challenge_len = elen;
644 break;
645 case WLAN_EID_VENDOR_SPECIFIC:
646 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
647 pos[2] == 0xf2) {
648 /* Microsoft OUI (00:50:F2) */
649
650 if (calc_crc)
651 crc = crc32_be(crc, pos - 2, elen + 2);
652
653 if (pos[3] == 1) {
654 /* OUI Type 1 - WPA IE */
655 elems->wpa = pos;
656 elems->wpa_len = elen;
657 } else if (elen >= 5 && pos[3] == 2) {
658 /* OUI Type 2 - WMM IE */
659 if (pos[4] == 0) {
660 elems->wmm_info = pos;
661 elems->wmm_info_len = elen;
662 } else if (pos[4] == 1) {
663 elems->wmm_param = pos;
664 elems->wmm_param_len = elen;
665 }
666 }
667 }
668 break;
669 case WLAN_EID_RSN:
670 elems->rsn = pos;
671 elems->rsn_len = elen;
672 break;
673 case WLAN_EID_ERP_INFO:
674 elems->erp_info = pos;
675 elems->erp_info_len = elen;
676 break;
677 case WLAN_EID_EXT_SUPP_RATES:
678 elems->ext_supp_rates = pos;
679 elems->ext_supp_rates_len = elen;
680 break;
681 case WLAN_EID_HT_CAPABILITY:
682 if (elen >= sizeof(struct ieee80211_ht_cap))
683 elems->ht_cap_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800684 else
685 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100686 break;
687 case WLAN_EID_HT_INFORMATION:
688 if (elen >= sizeof(struct ieee80211_ht_info))
689 elems->ht_info_elem = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800690 else
691 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100692 break;
693 case WLAN_EID_MESH_ID:
694 elems->mesh_id = pos;
695 elems->mesh_id_len = elen;
696 break;
697 case WLAN_EID_MESH_CONFIG:
698 if (elen >= sizeof(struct ieee80211_meshconf_ie))
699 elems->mesh_config = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800700 else
701 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100702 break;
703 case WLAN_EID_PEER_MGMT:
704 elems->peering = pos;
705 elems->peering_len = elen;
706 break;
707 case WLAN_EID_PREQ:
708 elems->preq = pos;
709 elems->preq_len = elen;
710 break;
711 case WLAN_EID_PREP:
712 elems->prep = pos;
713 elems->prep_len = elen;
714 break;
715 case WLAN_EID_PERR:
716 elems->perr = pos;
717 elems->perr_len = elen;
718 break;
719 case WLAN_EID_RANN:
720 if (elen >= sizeof(struct ieee80211_rann_ie))
721 elems->rann = (void *)pos;
Paul Stewartfcff4f12012-02-23 17:59:53 -0800722 else
723 elem_parse_failed = true;
Johannes Bergdd769862011-11-18 16:54:50 +0100724 break;
725 case WLAN_EID_CHANNEL_SWITCH:
726 elems->ch_switch_elem = pos;
727 elems->ch_switch_elem_len = elen;
728 break;
729 case WLAN_EID_QUIET:
730 if (!elems->quiet_elem) {
731 elems->quiet_elem = pos;
732 elems->quiet_elem_len = elen;
733 }
734 elems->num_of_quiet_elem++;
735 break;
736 case WLAN_EID_COUNTRY:
737 elems->country_elem = pos;
738 elems->country_elem_len = elen;
739 break;
740 case WLAN_EID_PWR_CONSTRAINT:
741 elems->pwr_constr_elem = pos;
742 elems->pwr_constr_elem_len = elen;
743 break;
744 case WLAN_EID_TIMEOUT_INTERVAL:
745 elems->timeout_int = pos;
746 elems->timeout_int_len = elen;
747 break;
748 default:
749 break;
750 }
751
Paul Stewartfcff4f12012-02-23 17:59:53 -0800752 if (elem_parse_failed)
753 elems->parse_error = true;
754 else
755 set_bit(id, seen_elems);
756
Johannes Bergdd769862011-11-18 16:54:50 +0100757 left -= elen;
758 pos += elen;
759 }
760
Paul Stewartfcff4f12012-02-23 17:59:53 -0800761 if (left != 0)
762 elems->parse_error = true;
763
Johannes Bergdd769862011-11-18 16:54:50 +0100764 return crc;
765}
766
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200767void ieee802_11_parse_elems(u8 *start, size_t len,
768 struct ieee802_11_elems *elems)
769{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200770 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
771}
772
Johannes Berg3abead52012-03-02 15:56:59 +0100773void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
774 bool bss_notify)
Johannes Berg5825fe102008-09-09 12:56:01 +0200775{
776 struct ieee80211_local *local = sdata->local;
777 struct ieee80211_tx_queue_params qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200778 int queue;
779 bool use_11b;
780 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200781
782 if (!local->ops->conf_tx)
783 return;
784
785 memset(&qparam, 0, sizeof(qparam));
786
Johannes Bergaa837e12009-05-07 16:16:24 +0200787 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
788 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe102008-09-09 12:56:01 +0200789
Johannes Berg005e4722012-02-26 11:24:35 +0100790 for (queue = 0; queue < local->hw.queues; queue++) {
Johannes Bergaa837e12009-05-07 16:16:24 +0200791 /* Set defaults according to 802.11-2007 Table 7-37 */
792 aCWmax = 1023;
793 if (use_11b)
794 aCWmin = 31;
795 else
796 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200797
Johannes Bergaa837e12009-05-07 16:16:24 +0200798 switch (queue) {
799 case 3: /* AC_BK */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200800 qparam.cw_max = aCWmax;
801 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200802 qparam.txop = 0;
803 qparam.aifs = 7;
804 break;
805 default: /* never happens but let's not leave undefined */
806 case 2: /* AC_BE */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200807 qparam.cw_max = aCWmax;
808 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200809 qparam.txop = 0;
810 qparam.aifs = 3;
811 break;
812 case 1: /* AC_VI */
813 qparam.cw_max = aCWmin;
814 qparam.cw_min = (aCWmin + 1) / 2 - 1;
815 if (use_11b)
816 qparam.txop = 6016/32;
817 else
818 qparam.txop = 3008/32;
819 qparam.aifs = 2;
820 break;
821 case 0: /* AC_VO */
822 qparam.cw_max = (aCWmin + 1) / 2 - 1;
823 qparam.cw_min = (aCWmin + 1) / 4 - 1;
824 if (use_11b)
825 qparam.txop = 3264/32;
826 else
827 qparam.txop = 1504/32;
828 qparam.aifs = 2;
829 break;
830 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200831
Kalle Valoab133152010-01-12 10:42:31 +0200832 qparam.uapsd = false;
833
Eliad Pellerf6f3def2011-09-25 20:06:54 +0300834 sdata->tx_conf[queue] = qparam;
835 drv_conf_tx(local, sdata, queue, &qparam);
Johannes Bergaa837e12009-05-07 16:16:24 +0200836 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200837
838 /* after reinitialize QoS TX queues setting to default,
839 * disable QoS at all */
Sujithd9734972010-07-23 10:47:11 +0530840
841 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
842 sdata->vif.bss_conf.qos =
843 sdata->vif.type != NL80211_IFTYPE_STATION;
Johannes Berg3abead52012-03-02 15:56:59 +0100844 if (bss_notify)
845 ieee80211_bss_info_change_notify(sdata,
846 BSS_CHANGED_QOS);
Sujithd9734972010-07-23 10:47:11 +0530847 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200848}
Johannes Berge50db652008-09-09 15:07:09 +0200849
Johannes Berg46900292009-02-15 12:44:28 +0100850void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
851 const size_t supp_rates_len,
852 const u8 *supp_rates)
853{
854 struct ieee80211_local *local = sdata->local;
855 int i, have_higher_than_11mbit = 0;
856
857 /* cf. IEEE 802.11 9.2.12 */
858 for (i = 0; i < supp_rates_len; i++)
859 if ((supp_rates[i] & 0x7f) * 5 > 110)
860 have_higher_than_11mbit = 1;
861
862 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
863 have_higher_than_11mbit)
864 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
865 else
866 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
867
Johannes Berg3abead52012-03-02 15:56:59 +0100868 ieee80211_set_wmm_default(sdata, true);
Johannes Berg46900292009-02-15 12:44:28 +0100869}
870
Johannes Berg881d9482009-01-21 15:13:48 +0100871u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200872 enum ieee80211_band band)
873{
874 struct ieee80211_supported_band *sband;
875 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100876 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200877 enum ieee80211_rate_flags mandatory_flag;
878 int i;
879
880 sband = local->hw.wiphy->bands[band];
881 if (!sband) {
882 WARN_ON(1);
883 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
884 }
885
886 if (band == IEEE80211_BAND_2GHZ)
887 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
888 else
889 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
890
891 bitrates = sband->bitrates;
892 mandatory_rates = 0;
893 for (i = 0; i < sband->n_bitrates; i++)
894 if (bitrates[i].flags & mandatory_flag)
895 mandatory_rates |= BIT(i);
896 return mandatory_rates;
897}
Johannes Berg46900292009-02-15 12:44:28 +0100898
899void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
900 u16 transaction, u16 auth_alg,
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100901 u8 *extra, size_t extra_len, const u8 *da,
902 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100903{
904 struct ieee80211_local *local = sdata->local;
905 struct sk_buff *skb;
906 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +0200907 int err;
Johannes Berg46900292009-02-15 12:44:28 +0100908
909 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200910 sizeof(*mgmt) + 6 + extra_len);
Joe Perchesd15b8452011-08-29 14:17:31 -0700911 if (!skb)
Johannes Berg46900292009-02-15 12:44:28 +0100912 return;
Joe Perchesd15b8452011-08-29 14:17:31 -0700913
Johannes Berg46900292009-02-15 12:44:28 +0100914 skb_reserve(skb, local->hw.extra_tx_headroom);
915
916 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
917 memset(mgmt, 0, 24 + 6);
918 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
919 IEEE80211_STYPE_AUTH);
Antonio Quartulliefa6a092012-01-09 19:43:06 +0100920 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100921 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100922 memcpy(mgmt->bssid, bssid, ETH_ALEN);
923 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
924 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
925 mgmt->u.auth.status_code = cpu_to_le16(0);
926 if (extra)
927 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100928
Johannes Bergfffd0932009-07-08 14:22:54 +0200929 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
930 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
931 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
932 WARN_ON(err);
933 }
934
Johannes Berg62ae67b2009-11-18 18:42:05 +0100935 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
936 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +0100937}
938
Johannes Bergde95a542009-04-01 11:58:36 +0200939int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec582009-10-27 20:59:55 +0100940 const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +0300941 enum ieee80211_band band, u32 rate_mask,
942 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +0200943{
944 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100945 u8 *pos;
946 size_t offset = 0, noffset;
947 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300948 u8 rates[32];
949 int num_rates;
950 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200951
Johannes Berg4d36ec582009-10-27 20:59:55 +0100952 sband = local->hw.wiphy->bands[band];
Johannes Bergde95a542009-04-01 11:58:36 +0200953
954 pos = buffer;
955
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300956 num_rates = 0;
957 for (i = 0; i < sband->n_bitrates; i++) {
958 if ((BIT(i) & rate_mask) == 0)
959 continue; /* skip rate */
960 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
961 }
962
963 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +0100964
Johannes Bergde95a542009-04-01 11:58:36 +0200965 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100966 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300967 memcpy(pos, rates, supp_rates_len);
968 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200969
Johannes Berg8e664fb2009-12-23 13:15:38 +0100970 /* insert "request information" if in custom IEs */
971 if (ie && ie_len) {
972 static const u8 before_extrates[] = {
973 WLAN_EID_SSID,
974 WLAN_EID_SUPP_RATES,
975 WLAN_EID_REQUEST,
976 };
977 noffset = ieee80211_ie_split(ie, ie_len,
978 before_extrates,
979 ARRAY_SIZE(before_extrates),
980 offset);
981 memcpy(pos, ie + offset, noffset - offset);
982 pos += noffset - offset;
983 offset = noffset;
984 }
Johannes Bergde95a542009-04-01 11:58:36 +0200985
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300986 ext_rates_len = num_rates - supp_rates_len;
987 if (ext_rates_len > 0) {
Johannes Berg8e664fb2009-12-23 13:15:38 +0100988 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300989 *pos++ = ext_rates_len;
990 memcpy(pos, rates + supp_rates_len, ext_rates_len);
991 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100992 }
993
Jouni Malinen651b5222010-08-28 19:37:51 +0300994 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
995 *pos++ = WLAN_EID_DS_PARAMS;
996 *pos++ = 1;
997 *pos++ = channel;
998 }
999
Johannes Berg8e664fb2009-12-23 13:15:38 +01001000 /* insert custom IEs that go before HT */
1001 if (ie && ie_len) {
1002 static const u8 before_ht[] = {
1003 WLAN_EID_SSID,
1004 WLAN_EID_SUPP_RATES,
1005 WLAN_EID_REQUEST,
1006 WLAN_EID_EXT_SUPP_RATES,
1007 WLAN_EID_DS_PARAMS,
1008 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1009 };
1010 noffset = ieee80211_ie_split(ie, ie_len,
1011 before_ht, ARRAY_SIZE(before_ht),
1012 offset);
1013 memcpy(pos, ie + offset, noffset - offset);
1014 pos += noffset - offset;
1015 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +02001016 }
1017
Alexander Simon42e7aa72011-10-26 14:47:26 -07001018 if (sband->ht_cap.ht_supported)
Ben Greearef96a8422011-11-18 11:32:00 -08001019 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1020 sband->ht_cap.cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +02001021
Johannes Bergde95a542009-04-01 11:58:36 +02001022 /*
1023 * If adding more here, adjust code in main.c
1024 * that calculates local->scan_ies_len.
1025 */
1026
Johannes Berg8e664fb2009-12-23 13:15:38 +01001027 /* add any remaining custom IEs */
1028 if (ie && ie_len) {
1029 noffset = ie_len;
1030 memcpy(pos, ie + offset, noffset - offset);
1031 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001032 }
1033
1034 return pos - buffer;
1035}
1036
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001037struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
Johannes Berg85a237f2011-07-18 18:08:36 +02001038 u8 *dst, u32 ratemask,
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001039 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001040 const u8 *ie, size_t ie_len,
1041 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001042{
1043 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001044 struct sk_buff *skb;
1045 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001046 size_t buf_len;
1047 u8 *buf;
Jouni Malinen651b5222010-08-28 19:37:51 +03001048 u8 chan;
Johannes Berg46900292009-02-15 12:44:28 +01001049
Kalle Valo7c12ce82010-01-05 20:16:44 +02001050 /* FIXME: come up with a proper value */
1051 buf = kmalloc(200 + ie_len, GFP_KERNEL);
Joe Perchesd15b8452011-08-29 14:17:31 -07001052 if (!buf)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001053 return NULL;
Johannes Berg46900292009-02-15 12:44:28 +01001054
Paul Stewarta806c552011-06-23 09:00:11 -08001055 /*
1056 * Do not send DS Channel parameter for directed probe requests
1057 * in order to maximize the chance that we get a response. Some
1058 * badly-behaved APs don't respond when this parameter is included.
1059 */
1060 if (directed)
1061 chan = 0;
1062 else
1063 chan = ieee80211_frequency_to_channel(
1064 local->hw.conf.channel->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001065
Kalle Valo7c12ce82010-01-05 20:16:44 +02001066 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001067 local->hw.conf.channel->band,
Johannes Berg85a237f2011-07-18 18:08:36 +02001068 ratemask, chan);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001069
1070 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1071 ssid, ssid_len,
1072 buf, buf_len);
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001073 if (!skb)
1074 goto out;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001075
Johannes Berg46900292009-02-15 12:44:28 +01001076 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001077 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001078 memcpy(mgmt->da, dst, ETH_ALEN);
1079 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001080 }
Johannes Berg46900292009-02-15 12:44:28 +01001081
Johannes Berg62ae67b2009-11-18 18:42:05 +01001082 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Johannes Berg5b2bbf72011-11-08 13:04:41 +01001083
1084 out:
Ming Lei145b6d12010-01-15 21:44:21 +08001085 kfree(buf);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001086
1087 return skb;
1088}
1089
1090void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1091 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001092 const u8 *ie, size_t ie_len,
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301093 u32 ratemask, bool directed, bool no_cck)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001094{
1095 struct sk_buff *skb;
1096
Johannes Berg85a237f2011-07-18 18:08:36 +02001097 skb = ieee80211_build_probe_req(sdata, dst, ratemask, ssid, ssid_len,
1098 ie, ie_len, directed);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301099 if (skb) {
1100 if (no_cck)
1101 IEEE80211_SKB_CB(skb)->flags |=
1102 IEEE80211_TX_CTL_NO_CCK_RATE;
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001103 ieee80211_tx_skb(sdata, skb);
Rajkumar Manoharanaad14ce2011-09-25 14:53:31 +05301104 }
Johannes Berg46900292009-02-15 12:44:28 +01001105}
1106
1107u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1108 struct ieee802_11_elems *elems,
1109 enum ieee80211_band band)
1110{
1111 struct ieee80211_supported_band *sband;
1112 struct ieee80211_rate *bitrates;
1113 size_t num_rates;
1114 u32 supp_rates;
1115 int i, j;
1116 sband = local->hw.wiphy->bands[band];
1117
1118 if (!sband) {
1119 WARN_ON(1);
1120 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1121 }
1122
1123 bitrates = sband->bitrates;
1124 num_rates = sband->n_bitrates;
1125 supp_rates = 0;
1126 for (i = 0; i < elems->supp_rates_len +
1127 elems->ext_supp_rates_len; i++) {
1128 u8 rate = 0;
1129 int own_rate;
1130 if (i < elems->supp_rates_len)
1131 rate = elems->supp_rates[i];
1132 else if (elems->ext_supp_rates)
1133 rate = elems->ext_supp_rates
1134 [i - elems->supp_rates_len];
1135 own_rate = 5 * (rate & 0x7f);
1136 for (j = 0; j < num_rates; j++)
1137 if (bitrates[j].bitrate == own_rate)
1138 supp_rates |= BIT(j);
1139 }
1140 return supp_rates;
1141}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001142
Johannes Berg84f6a012009-08-20 20:02:20 +02001143void ieee80211_stop_device(struct ieee80211_local *local)
1144{
1145 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001146 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001147
1148 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001149
1150 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001151 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001152}
1153
Johannes Bergf2753dd2009-04-14 10:09:24 +02001154int ieee80211_reconfig(struct ieee80211_local *local)
1155{
1156 struct ieee80211_hw *hw = &local->hw;
1157 struct ieee80211_sub_if_data *sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001158 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001159 int res, i;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001160
Johannes Bergeecc4802011-05-04 15:37:29 +02001161#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001162 if (local->suspended)
1163 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001164
Johannes Bergeecc4802011-05-04 15:37:29 +02001165 if (local->wowlan) {
1166 local->wowlan = false;
1167 res = drv_resume(local);
1168 if (res < 0) {
1169 local->resuming = false;
1170 return res;
1171 }
1172 if (res == 0)
1173 goto wake_up;
1174 WARN_ON(res > 1);
1175 /*
1176 * res is 1, which means the driver requested
1177 * to go through a regular reset on wakeup.
1178 */
1179 }
1180#endif
Johannes Berg94f9b972011-07-14 16:48:54 +02001181 /* everything else happens only if HW was up & running */
1182 if (!local->open_count)
1183 goto wake_up;
1184
1185 /*
1186 * Upon resume hardware can sometimes be goofy due to
1187 * various platform / driver / bus issues, so restarting
1188 * the device may at times not work immediately. Propagate
1189 * the error.
1190 */
1191 res = drv_start(local);
1192 if (res) {
1193 WARN(local->suspended, "Hardware became unavailable "
1194 "upon resume. This could be a software issue "
1195 "prior to suspend or a hardware issue.\n");
1196 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001197 }
1198
Yogesh Ashok Powar7f281972011-12-30 16:34:25 +05301199 /* setup fragmentation threshold */
1200 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1201
1202 /* setup RTS threshold */
1203 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1204
1205 /* reset coverage class */
1206 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1207
Johannes Berg94f9b972011-07-14 16:48:54 +02001208 ieee80211_led_radio(local, true);
1209 ieee80211_mod_tpt_led_trig(local,
1210 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1211
Johannes Bergf2753dd2009-04-14 10:09:24 +02001212 /* add interfaces */
1213 list_for_each_entry(sdata, &local->interfaces, list) {
1214 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1215 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001216 ieee80211_sdata_running(sdata))
Johannes Berg7b7eab62011-11-03 14:41:13 +01001217 res = drv_add_interface(local, sdata);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001218 }
1219
1220 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001221 mutex_lock(&local->sta_mtx);
1222 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Bergf09603a2012-01-20 13:55:21 +01001223 if (sta->uploaded) {
1224 enum ieee80211_sta_state state;
1225
Johannes Bergf09603a2012-01-20 13:55:21 +01001226 for (state = IEEE80211_STA_NOTEXIST;
1227 state < sta->sta_state - 1; state++)
1228 WARN_ON(drv_sta_state(local, sta->sdata, sta,
1229 state, state + 1));
1230 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001231 }
Johannes Berg34e89502010-02-03 13:59:58 +01001232 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001233
Eliad Peller2683d652011-07-14 20:29:42 +03001234 /* reconfigure tx conf */
Eliad Pellerf6f3def2011-09-25 20:06:54 +03001235 list_for_each_entry(sdata, &local->interfaces, list) {
1236 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1237 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1238 !ieee80211_sdata_running(sdata))
1239 continue;
1240
1241 for (i = 0; i < hw->queues; i++)
1242 drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]);
1243 }
Eliad Peller2683d652011-07-14 20:29:42 +03001244
Johannes Bergf2753dd2009-04-14 10:09:24 +02001245 /* reconfigure hardware */
1246 ieee80211_hw_config(local, ~0);
1247
Johannes Bergf2753dd2009-04-14 10:09:24 +02001248 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001249
1250 /* Finally also reconfigure all the BSS information */
1251 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001252 u32 changed;
1253
Johannes Berg9607e6b2009-12-23 13:15:31 +01001254 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001255 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001256
1257 /* common change flags for all interface types */
1258 changed = BSS_CHANGED_ERP_CTS_PROT |
1259 BSS_CHANGED_ERP_PREAMBLE |
1260 BSS_CHANGED_ERP_SLOT |
1261 BSS_CHANGED_HT |
1262 BSS_CHANGED_BASIC_RATES |
1263 BSS_CHANGED_BEACON_INT |
1264 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001265 BSS_CHANGED_CQM |
Eliad Peller55de47f2011-11-01 15:16:55 +02001266 BSS_CHANGED_QOS |
1267 BSS_CHANGED_IDLE;
Johannes Bergac8dd502010-05-05 09:44:02 +02001268
Johannes Bergf2753dd2009-04-14 10:09:24 +02001269 switch (sdata->vif.type) {
1270 case NL80211_IFTYPE_STATION:
Eliad Peller0d392e92011-12-12 14:10:49 +02001271 changed |= BSS_CHANGED_ASSOC |
1272 BSS_CHANGED_ARP_FILTER;
Eliad Pellera7b545f2011-02-08 18:43:19 +02001273 mutex_lock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001274 ieee80211_bss_info_change_notify(sdata, changed);
Eliad Pellera7b545f2011-02-08 18:43:19 +02001275 mutex_unlock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001276 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001277 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001278 changed |= BSS_CHANGED_IBSS;
1279 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001280 case NL80211_IFTYPE_AP:
Arik Nemtsove7979ac2011-11-22 19:33:18 +02001281 changed |= BSS_CHANGED_SSID;
1282
1283 if (sdata->vif.type == NL80211_IFTYPE_AP)
1284 changed |= BSS_CHANGED_AP_PROBE_RESP;
1285
Arik Nemtsov78274932011-09-04 11:11:32 +03001286 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001287 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001288 changed |= BSS_CHANGED_BEACON |
1289 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001290 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001291 break;
1292 case NL80211_IFTYPE_WDS:
1293 break;
1294 case NL80211_IFTYPE_AP_VLAN:
1295 case NL80211_IFTYPE_MONITOR:
1296 /* ignore virtual */
1297 break;
1298 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001299 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001300 case NL80211_IFTYPE_P2P_CLIENT:
1301 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001302 WARN_ON(1);
1303 break;
1304 }
1305 }
1306
Eyal Shapira8e1b23b2011-11-09 12:29:06 +02001307 ieee80211_recalc_ps(local, -1);
1308
Johannes Berg2a419052010-06-10 10:21:29 +02001309 /*
Eliad Peller6e1b1b22012-01-26 13:36:05 +02001310 * The sta might be in psm against the ap (e.g. because
1311 * this was the state before a hw restart), so we
1312 * explicitly send a null packet in order to make sure
1313 * it'll sync against the ap (and get out of psm).
1314 */
1315 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1316 list_for_each_entry(sdata, &local->interfaces, list) {
1317 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1318 continue;
1319
1320 ieee80211_send_nullfunc(local, sdata, 0);
1321 }
1322 }
1323
1324 /*
Johannes Berg2a419052010-06-10 10:21:29 +02001325 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1326 * sessions can be established after a resume.
1327 *
1328 * Also tear down aggregation sessions since reconfiguring
1329 * them in a hardware restart scenario is not easily done
1330 * right now, and the hardware will have lost information
1331 * about the sessions, but we and the AP still think they
1332 * are active. This is really a workaround though.
1333 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001334 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001335 mutex_lock(&local->sta_mtx);
1336
1337 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg53f73c02010-10-05 19:37:40 +02001338 ieee80211_sta_tear_down_BA_sessions(sta, true);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001339 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001340 }
Johannes Berg2a419052010-06-10 10:21:29 +02001341
1342 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001343 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001344
Johannes Bergf2753dd2009-04-14 10:09:24 +02001345 /* add back keys */
1346 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg9607e6b2009-12-23 13:15:31 +01001347 if (ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001348 ieee80211_enable_keys(sdata);
1349
Johannes Bergeecc4802011-05-04 15:37:29 +02001350 wake_up:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001351 ieee80211_wake_queues_by_reason(hw,
1352 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1353
Johannes Berg5bb644a2009-05-17 11:40:42 +02001354 /*
1355 * If this is for hw restart things are still running.
1356 * We may want to change that later, however.
1357 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001358 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001359 return 0;
1360
1361#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001362 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001363 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001364 mb();
1365 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001366
1367 list_for_each_entry(sdata, &local->interfaces, list) {
1368 switch(sdata->vif.type) {
1369 case NL80211_IFTYPE_STATION:
1370 ieee80211_sta_restart(sdata);
1371 break;
1372 case NL80211_IFTYPE_ADHOC:
1373 ieee80211_ibss_restart(sdata);
1374 break;
1375 case NL80211_IFTYPE_MESH_POINT:
1376 ieee80211_mesh_restart(sdata);
1377 break;
1378 default:
1379 break;
1380 }
1381 }
1382
Johannes Berg26d59532011-04-01 13:52:48 +02001383 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001384
Johannes Berg34e89502010-02-03 13:59:58 +01001385 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001386 list_for_each_entry(sta, &local->sta_list, list)
1387 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001388 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001389#else
1390 WARN_ON(1);
1391#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001392 return 0;
1393}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001394
Johannes Berg95acac62011-07-12 12:30:59 +02001395void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1396{
1397 struct ieee80211_sub_if_data *sdata;
1398 struct ieee80211_local *local;
1399 struct ieee80211_key *key;
1400
1401 if (WARN_ON(!vif))
1402 return;
1403
1404 sdata = vif_to_sdata(vif);
1405 local = sdata->local;
1406
1407 if (WARN_ON(!local->resuming))
1408 return;
1409
1410 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1411 return;
1412
1413 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1414
1415 mutex_lock(&local->key_mtx);
1416 list_for_each_entry(key, &sdata->key_list, list)
1417 key->flags |= KEY_FLAG_TAINTED;
1418 mutex_unlock(&local->key_mtx);
1419}
1420EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1421
Johannes Berg0f782312009-12-01 13:37:02 +01001422static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1423 enum ieee80211_smps_mode *smps_mode)
1424{
1425 if (ifmgd->associated) {
1426 *smps_mode = ifmgd->ap_smps;
1427
1428 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1429 if (ifmgd->powersave)
1430 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1431 else
1432 *smps_mode = IEEE80211_SMPS_OFF;
1433 }
1434
1435 return 1;
1436 }
1437
1438 return 0;
1439}
1440
1441/* must hold iflist_mtx */
Johannes Berg025e6be2010-10-05 10:41:47 +02001442void ieee80211_recalc_smps(struct ieee80211_local *local)
Johannes Berg0f782312009-12-01 13:37:02 +01001443{
1444 struct ieee80211_sub_if_data *sdata;
1445 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1446 int count = 0;
1447
Johannes Berg46a5eba2010-09-15 13:28:15 +02001448 lockdep_assert_held(&local->iflist_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001449
1450 /*
1451 * This function could be improved to handle multiple
1452 * interfaces better, but right now it makes any
1453 * non-station interfaces force SM PS to be turned
1454 * off. If there are multiple station interfaces it
1455 * could also use the best possible mode, e.g. if
1456 * one is in static and the other in dynamic then
1457 * dynamic is ok.
1458 */
1459
1460 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg26a58452010-08-27 12:35:55 +02001461 if (!ieee80211_sdata_running(sdata))
Johannes Berg0f782312009-12-01 13:37:02 +01001462 continue;
1463 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1464 goto set;
Johannes Berg025e6be2010-10-05 10:41:47 +02001465
1466 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
Johannes Berg0f782312009-12-01 13:37:02 +01001467
1468 if (count > 1) {
1469 smps_mode = IEEE80211_SMPS_OFF;
1470 break;
1471 }
1472 }
1473
1474 if (smps_mode == local->smps_mode)
1475 return;
1476
1477 set:
1478 local->smps_mode = smps_mode;
1479 /* changed flag is auto-detected for this */
1480 ieee80211_hw_config(local, 0);
1481}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001482
1483static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1484{
1485 int i;
1486
1487 for (i = 0; i < n_ids; i++)
1488 if (ids[i] == id)
1489 return true;
1490 return false;
1491}
1492
1493/**
1494 * ieee80211_ie_split - split an IE buffer according to ordering
1495 *
1496 * @ies: the IE buffer
1497 * @ielen: the length of the IE buffer
1498 * @ids: an array with element IDs that are allowed before
1499 * the split
1500 * @n_ids: the size of the element ID array
1501 * @offset: offset where to start splitting in the buffer
1502 *
1503 * This function splits an IE buffer by updating the @offset
1504 * variable to point to the location where the buffer should be
1505 * split.
1506 *
1507 * It assumes that the given IE buffer is well-formed, this
1508 * has to be guaranteed by the caller!
1509 *
1510 * It also assumes that the IEs in the buffer are ordered
1511 * correctly, if not the result of using this function will not
1512 * be ordered correctly either, i.e. it does no reordering.
1513 *
1514 * The function returns the offset where the next part of the
1515 * buffer starts, which may be @ielen if the entire (remainder)
1516 * of the buffer should be used.
1517 */
1518size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1519 const u8 *ids, int n_ids, size_t offset)
1520{
1521 size_t pos = offset;
1522
1523 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1524 pos += 2 + ies[pos + 1];
1525
1526 return pos;
1527}
1528
1529size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1530{
1531 size_t pos = offset;
1532
1533 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1534 pos += 2 + ies[pos + 1];
1535
1536 return pos;
1537}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001538
1539static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1540 int rssi_min_thold,
1541 int rssi_max_thold)
1542{
1543 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1544
1545 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1546 return;
1547
1548 /*
1549 * Scale up threshold values before storing it, as the RSSI averaging
1550 * algorithm uses a scaled up value as well. Change this scaling
1551 * factor if the RSSI averaging algorithm changes.
1552 */
1553 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1554 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1555}
1556
1557void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1558 int rssi_min_thold,
1559 int rssi_max_thold)
1560{
1561 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1562
1563 WARN_ON(rssi_min_thold == rssi_max_thold ||
1564 rssi_min_thold > rssi_max_thold);
1565
1566 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1567 rssi_max_thold);
1568}
1569EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1570
1571void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1572{
1573 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1574
1575 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1576}
1577EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
Arik Nemtsov768db342011-09-28 14:12:51 +03001578
Ben Greearef96a8422011-11-18 11:32:00 -08001579u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
Alexander Simon42e7aa72011-10-26 14:47:26 -07001580 u16 cap)
1581{
1582 __le16 tmp;
1583
1584 *pos++ = WLAN_EID_HT_CAPABILITY;
1585 *pos++ = sizeof(struct ieee80211_ht_cap);
1586 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
1587
1588 /* capability flags */
1589 tmp = cpu_to_le16(cap);
1590 memcpy(pos, &tmp, sizeof(u16));
1591 pos += sizeof(u16);
1592
1593 /* AMPDU parameters */
Ben Greearef96a8422011-11-18 11:32:00 -08001594 *pos++ = ht_cap->ampdu_factor |
1595 (ht_cap->ampdu_density <<
Alexander Simon42e7aa72011-10-26 14:47:26 -07001596 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
1597
1598 /* MCS set */
Ben Greearef96a8422011-11-18 11:32:00 -08001599 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
1600 pos += sizeof(ht_cap->mcs);
Alexander Simon42e7aa72011-10-26 14:47:26 -07001601
1602 /* extended capabilities */
1603 pos += sizeof(__le16);
1604
1605 /* BF capabilities */
1606 pos += sizeof(__le32);
1607
1608 /* antenna selection */
1609 pos += sizeof(u8);
1610
1611 return pos;
1612}
1613
1614u8 *ieee80211_ie_build_ht_info(u8 *pos,
1615 struct ieee80211_sta_ht_cap *ht_cap,
1616 struct ieee80211_channel *channel,
1617 enum nl80211_channel_type channel_type)
1618{
1619 struct ieee80211_ht_info *ht_info;
1620 /* Build HT Information */
1621 *pos++ = WLAN_EID_HT_INFORMATION;
1622 *pos++ = sizeof(struct ieee80211_ht_info);
1623 ht_info = (struct ieee80211_ht_info *)pos;
1624 ht_info->control_chan =
1625 ieee80211_frequency_to_channel(channel->center_freq);
1626 switch (channel_type) {
1627 case NL80211_CHAN_HT40MINUS:
1628 ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1629 break;
1630 case NL80211_CHAN_HT40PLUS:
1631 ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1632 break;
1633 case NL80211_CHAN_HT20:
1634 default:
1635 ht_info->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1636 break;
1637 }
1638 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)
1639 ht_info->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
Simon Wunderlichff3cc5f2011-11-30 16:56:33 +01001640
1641 /*
1642 * Note: According to 802.11n-2009 9.13.3.1, HT Protection field and
1643 * RIFS Mode are reserved in IBSS mode, therefore keep them at 0
1644 */
Alexander Simon42e7aa72011-10-26 14:47:26 -07001645 ht_info->operation_mode = 0x0000;
1646 ht_info->stbc_param = 0x0000;
1647
1648 /* It seems that Basic MCS set and Supported MCS set
1649 are identical for the first 10 bytes */
1650 memset(&ht_info->basic_set, 0, 16);
1651 memcpy(&ht_info->basic_set, &ht_cap->mcs, 10);
1652
1653 return pos + sizeof(struct ieee80211_ht_info);
1654}
1655
1656enum nl80211_channel_type
1657ieee80211_ht_info_to_channel_type(struct ieee80211_ht_info *ht_info)
1658{
1659 enum nl80211_channel_type channel_type;
1660
1661 if (!ht_info)
1662 return NL80211_CHAN_NO_HT;
1663
1664 switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
1665 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1666 channel_type = NL80211_CHAN_HT20;
1667 break;
1668 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1669 channel_type = NL80211_CHAN_HT40PLUS;
1670 break;
1671 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1672 channel_type = NL80211_CHAN_HT40MINUS;
1673 break;
1674 default:
1675 channel_type = NL80211_CHAN_NO_HT;
1676 }
1677
1678 return channel_type;
1679}
1680
Arik Nemtsov768db342011-09-28 14:12:51 +03001681int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
1682{
1683 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1684 struct ieee80211_local *local = sdata->local;
1685 struct ieee80211_supported_band *sband;
1686 int rate;
1687 u8 i, rates, *pos;
1688
1689 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1690 rates = sband->n_bitrates;
1691 if (rates > 8)
1692 rates = 8;
1693
1694 if (skb_tailroom(skb) < rates + 2)
1695 return -ENOMEM;
1696
1697 pos = skb_put(skb, rates + 2);
1698 *pos++ = WLAN_EID_SUPP_RATES;
1699 *pos++ = rates;
1700 for (i = 0; i < rates; i++) {
1701 rate = sband->bitrates[i].bitrate;
1702 *pos++ = (u8) (rate / 5);
1703 }
1704
1705 return 0;
1706}
1707
1708int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb)
1709{
1710 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1711 struct ieee80211_local *local = sdata->local;
1712 struct ieee80211_supported_band *sband;
1713 int rate;
1714 u8 i, exrates, *pos;
1715
1716 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1717 exrates = sband->n_bitrates;
1718 if (exrates > 8)
1719 exrates -= 8;
1720 else
1721 exrates = 0;
1722
1723 if (skb_tailroom(skb) < exrates + 2)
1724 return -ENOMEM;
1725
1726 if (exrates) {
1727 pos = skb_put(skb, exrates + 2);
1728 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1729 *pos++ = exrates;
1730 for (i = 8; i < sband->n_bitrates; i++) {
1731 rate = sband->bitrates[i].bitrate;
1732 *pos++ = (u8) (rate / 5);
1733 }
1734 }
1735 return 0;
1736}