blob: ca440bce3de8c06d555e2e33aeec7ce1877036db [file] [log] [blame]
Johannes Bergc2d15602007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/if_arp.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020021#include <linux/bitmap.h>
Johannes Bergd91f36d2009-04-16 13:17:26 +020022#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070023#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020024#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010025#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020026
27#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020028#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040029#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010030#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020031#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020032#include "led.h"
Johannes Bergfffd0932009-07-08 14:22:54 +020033#include "wep.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020034
35/* privid for wiphys to determine whether they belong to us or not */
36void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
37
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080038struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
39{
40 struct ieee80211_local *local;
41 BUG_ON(!wiphy);
42
43 local = wiphy_priv(wiphy);
44 return &local->hw;
45}
46EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020047
Ron Rindjunsky71364712007-12-25 17:00:36 +020048u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020049 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020050{
Harvey Harrisona494bb12008-06-11 14:21:58 -070051 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020052
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020053 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
54 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020055 return NULL;
56
Harvey Harrisona494bb12008-06-11 14:21:58 -070057 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020058 if (len < 24) /* drop incorrect hdr len (data) */
59 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070060
61 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020062 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070063 if (ieee80211_has_tods(fc))
64 return hdr->addr1;
65 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020066 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070067
68 return hdr->addr3;
69 }
70
71 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020072 if (len < 24) /* drop incorrect hdr len (mgmt) */
73 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020074 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070075 }
76
77 if (ieee80211_is_ctl(fc)) {
78 if(ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020079 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070080
81 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020082 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020083 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020084 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020085 case NL80211_IFTYPE_AP:
86 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020087 return hdr->addr1;
88 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070089 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020090 }
91 }
Johannes Bergc2d15602007-07-27 15:43:23 +020092 }
93
94 return NULL;
95}
96
Johannes Berg5cf121c2008-02-25 16:27:43 +010097void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +020098{
Johannes Berg2de8e0d2009-03-23 17:28:35 +010099 struct sk_buff *skb = tx->skb;
100 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200101
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100102 do {
103 hdr = (struct ieee80211_hdr *) skb->data;
104 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
105 } while ((skb = skb->next));
Johannes Bergc2d15602007-07-27 15:43:23 +0200106}
107
108int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
109 int rate, int erp, int short_preamble)
110{
111 int dur;
112
113 /* calculate duration (in microseconds, rounded up to next higher
114 * integer if it includes a fractional microsecond) to send frame of
115 * len bytes (does not include FCS) at the given rate. Duration will
116 * also include SIFS.
117 *
118 * rate is in 100 kbps, so divident is multiplied by 10 in the
119 * DIV_ROUND_UP() operations.
120 */
121
Johannes Berg8318d782008-01-24 19:38:38 +0100122 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200123 /*
124 * OFDM:
125 *
126 * N_DBPS = DATARATE x 4
127 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
128 * (16 = SIGNAL time, 6 = tail bits)
129 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
130 *
131 * T_SYM = 4 usec
132 * 802.11a - 17.5.2: aSIFSTime = 16 usec
133 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
134 * signal ext = 6 usec
135 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200136 dur = 16; /* SIFS + signal ext */
137 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
138 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
139 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
140 4 * rate); /* T_SYM x N_SYM */
141 } else {
142 /*
143 * 802.11b or 802.11g with 802.11b compatibility:
144 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
145 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
146 *
147 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
148 * aSIFSTime = 10 usec
149 * aPreambleLength = 144 usec or 72 usec with short preamble
150 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
151 */
152 dur = 10; /* aSIFSTime = 10 usec */
153 dur += short_preamble ? (72 + 24) : (144 + 48);
154
155 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
156 }
157
158 return dur;
159}
160
161/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100162__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
163 struct ieee80211_vif *vif,
Johannes Berg8318d782008-01-24 19:38:38 +0100164 size_t frame_len,
165 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200166{
167 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg25d834e2008-09-12 22:52:47 +0200168 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200169 u16 dur;
170 int erp;
Johannes Berg25d834e2008-09-12 22:52:47 +0200171 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200172
Johannes Berg8318d782008-01-24 19:38:38 +0100173 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200174 if (vif) {
175 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200176 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
178 erp = rate->flags & IEEE80211_RATE_ERP_G;
179 }
Johannes Berg8318d782008-01-24 19:38:38 +0100180
181 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
Johannes Berg25d834e2008-09-12 22:52:47 +0200182 short_preamble);
Johannes Bergc2d15602007-07-27 15:43:23 +0200183
184 return cpu_to_le16(dur);
185}
186EXPORT_SYMBOL(ieee80211_generic_frame_duration);
187
Johannes Berg32bfd352007-12-19 01:31:26 +0100188__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
189 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200190 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200191{
192 struct ieee80211_local *local = hw_to_local(hw);
193 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200194 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100195 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200196 int erp;
197 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200198 struct ieee80211_supported_band *sband;
199
200 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200201
Johannes Berg25d834e2008-09-12 22:52:47 +0200202 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200203
Johannes Berge039fa42008-05-15 12:55:29 +0200204 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100205
206 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200207 if (vif) {
208 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200209 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200210 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
211 erp = rate->flags & IEEE80211_RATE_ERP_G;
212 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200213
214 /* CTS duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100215 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200216 erp, short_preamble);
217 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100218 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200219 erp, short_preamble);
220 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100221 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200222 erp, short_preamble);
223
224 return cpu_to_le16(dur);
225}
226EXPORT_SYMBOL(ieee80211_rts_duration);
227
Johannes Berg32bfd352007-12-19 01:31:26 +0100228__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
229 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200230 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200231 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200232{
233 struct ieee80211_local *local = hw_to_local(hw);
234 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200235 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100236 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200237 int erp;
238 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200239 struct ieee80211_supported_band *sband;
240
241 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200242
Johannes Berg25d834e2008-09-12 22:52:47 +0200243 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200244
Johannes Berge039fa42008-05-15 12:55:29 +0200245 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100246 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200247 if (vif) {
248 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200249 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200250 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
251 erp = rate->flags & IEEE80211_RATE_ERP_G;
252 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200253
254 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100255 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200256 erp, short_preamble);
Johannes Berge039fa42008-05-15 12:55:29 +0200257 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200258 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100259 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200260 erp, short_preamble);
261 }
262
Johannes Bergc2d15602007-07-27 15:43:23 +0200263 return cpu_to_le16(dur);
264}
265EXPORT_SYMBOL(ieee80211_ctstoself_duration);
266
Kalle Valoce7c9112008-12-18 23:35:20 +0200267static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
268 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200269{
270 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100271 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200272
Johannes Bergb5878a22010-04-07 16:48:40 +0200273 trace_wake_queue(local, queue, reason);
274
Johannes Berge4e72fb2009-03-23 17:28:42 +0100275 if (WARN_ON(queue >= hw->queues))
276 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200277
Johannes Berg96f5e662009-02-12 00:51:53 +0100278 __clear_bit(reason, &local->queue_stop_reasons[queue]);
279
280 if (local->queue_stop_reasons[queue] != 0)
281 /* someone still has this queue stopped */
282 return;
283
Johannes Berg7236fe22010-03-22 13:42:43 -0700284 if (skb_queue_empty(&local->pending[queue])) {
285 rcu_read_lock();
Johannes Berg5b714c62010-08-27 13:45:28 +0200286 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
287 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
288 continue;
Johannes Berg2337db82010-08-27 13:36:49 +0200289 netif_wake_subqueue(sdata->dev, queue);
Johannes Berg5b714c62010-08-27 13:45:28 +0200290 }
Johannes Berg7236fe22010-03-22 13:42:43 -0700291 rcu_read_unlock();
292 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200293 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200294}
Kalle Valoce7c9112008-12-18 23:35:20 +0200295
Johannes Berg96f5e662009-02-12 00:51:53 +0100296void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
297 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200298{
299 struct ieee80211_local *local = hw_to_local(hw);
300 unsigned long flags;
301
302 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
303 __ieee80211_wake_queue(hw, queue, reason);
304 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
305}
306
307void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
308{
309 ieee80211_wake_queue_by_reason(hw, queue,
310 IEEE80211_QUEUE_STOP_REASON_DRIVER);
311}
Johannes Bergc2d15602007-07-27 15:43:23 +0200312EXPORT_SYMBOL(ieee80211_wake_queue);
313
Kalle Valoce7c9112008-12-18 23:35:20 +0200314static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
315 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200316{
317 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100318 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200319
Johannes Bergb5878a22010-04-07 16:48:40 +0200320 trace_stop_queue(local, queue, reason);
321
Johannes Berge4e72fb2009-03-23 17:28:42 +0100322 if (WARN_ON(queue >= hw->queues))
323 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100324
Johannes Berg2a577d92009-03-23 17:28:37 +0100325 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100326
327 rcu_read_lock();
328 list_for_each_entry_rcu(sdata, &local->interfaces, list)
Johannes Berg2337db82010-08-27 13:36:49 +0200329 netif_stop_subqueue(sdata->dev, queue);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100330 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200331}
Kalle Valoce7c9112008-12-18 23:35:20 +0200332
Johannes Berg96f5e662009-02-12 00:51:53 +0100333void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200335{
336 struct ieee80211_local *local = hw_to_local(hw);
337 unsigned long flags;
338
339 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
340 __ieee80211_stop_queue(hw, queue, reason);
341 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
342}
343
344void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
345{
346 ieee80211_stop_queue_by_reason(hw, queue,
347 IEEE80211_QUEUE_STOP_REASON_DRIVER);
348}
Johannes Bergc2d15602007-07-27 15:43:23 +0200349EXPORT_SYMBOL(ieee80211_stop_queue);
350
Johannes Berg8f77f382009-06-07 21:58:37 +0200351void ieee80211_add_pending_skb(struct ieee80211_local *local,
352 struct sk_buff *skb)
353{
354 struct ieee80211_hw *hw = &local->hw;
355 unsigned long flags;
356 int queue = skb_get_queue_mapping(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200357 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
358
359 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200360 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200361 return;
362 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200363
364 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
365 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200366 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200367 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
369}
370
Johannes Berg50a94322010-11-16 11:50:28 -0800371int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
372 struct sk_buff_head *skbs,
373 void (*fn)(void *data), void *data)
Johannes Berg8f77f382009-06-07 21:58:37 +0200374{
375 struct ieee80211_hw *hw = &local->hw;
376 struct sk_buff *skb;
377 unsigned long flags;
378 int queue, ret = 0, i;
379
380 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
381 for (i = 0; i < hw->queues; i++)
382 __ieee80211_stop_queue(hw, i,
383 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
384
385 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200386 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
387
388 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200389 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200390 continue;
391 }
392
Johannes Berg8f77f382009-06-07 21:58:37 +0200393 ret++;
394 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);
405
406 return ret;
407}
408
Johannes Berg50a94322010-11-16 11:50:28 -0800409int ieee80211_add_pending_skbs(struct ieee80211_local *local,
410 struct sk_buff_head *skbs)
411{
412 return ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
413}
414
Kalle Valoce7c9112008-12-18 23:35:20 +0200415void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
416 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200417{
Kalle Valoce7c9112008-12-18 23:35:20 +0200418 struct ieee80211_local *local = hw_to_local(hw);
419 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200420 int i;
421
Kalle Valoce7c9112008-12-18 23:35:20 +0200422 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
423
Johannes Berg96f5e662009-02-12 00:51:53 +0100424 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200425 __ieee80211_stop_queue(hw, i, reason);
426
427 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
428}
429
430void ieee80211_stop_queues(struct ieee80211_hw *hw)
431{
432 ieee80211_stop_queues_by_reason(hw,
433 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200434}
435EXPORT_SYMBOL(ieee80211_stop_queues);
436
Tomas Winkler92ab8532008-07-24 21:02:04 +0300437int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
438{
439 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200440 unsigned long flags;
441 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100442
Johannes Berge4e72fb2009-03-23 17:28:42 +0100443 if (WARN_ON(queue >= hw->queues))
444 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100445
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200446 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
447 ret = !!local->queue_stop_reasons[queue];
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300450}
451EXPORT_SYMBOL(ieee80211_queue_stopped);
452
Kalle Valoce7c9112008-12-18 23:35:20 +0200453void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
454 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200455{
Kalle Valoce7c9112008-12-18 23:35:20 +0200456 struct ieee80211_local *local = hw_to_local(hw);
457 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200458 int i;
459
Kalle Valoce7c9112008-12-18 23:35:20 +0200460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
461
Johannes Berge4e72fb2009-03-23 17:28:42 +0100462 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200463 __ieee80211_wake_queue(hw, i, reason);
464
465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
466}
467
468void ieee80211_wake_queues(struct ieee80211_hw *hw)
469{
470 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200471}
472EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100473
Johannes Berg32bfd352007-12-19 01:31:26 +0100474void ieee80211_iterate_active_interfaces(
475 struct ieee80211_hw *hw,
476 void (*iterator)(void *data, u8 *mac,
477 struct ieee80211_vif *vif),
478 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100479{
480 struct ieee80211_local *local = hw_to_local(hw);
481 struct ieee80211_sub_if_data *sdata;
482
Johannes Bergc771c9d2009-01-23 22:54:03 +0100483 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200484
485 list_for_each_entry(sdata, &local->interfaces, list) {
486 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200487 case NL80211_IFTYPE_MONITOR:
488 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200489 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200490 default:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200491 break;
492 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100493 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100494 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200495 &sdata->vif);
496 }
497
Johannes Bergc771c9d2009-01-23 22:54:03 +0100498 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200499}
500EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
501
502void ieee80211_iterate_active_interfaces_atomic(
503 struct ieee80211_hw *hw,
504 void (*iterator)(void *data, u8 *mac,
505 struct ieee80211_vif *vif),
506 void *data)
507{
508 struct ieee80211_local *local = hw_to_local(hw);
509 struct ieee80211_sub_if_data *sdata;
510
Johannes Berge38bad42007-11-28 10:55:32 +0100511 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100512
Johannes Berge38bad42007-11-28 10:55:32 +0100513 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100514 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200515 case NL80211_IFTYPE_MONITOR:
516 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100517 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200518 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100519 break;
520 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100521 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100522 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100523 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100524 }
Johannes Berge38bad42007-11-28 10:55:32 +0100525
526 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100527}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200528EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200529
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400530/*
531 * Nothing should have been stuffed into the workqueue during
532 * the suspend->resume cycle. If this WARN is seen then there
533 * is a bug with either the driver suspend or something in
534 * mac80211 stuffing into the workqueue which we haven't yet
535 * cleared during mac80211's suspend cycle.
536 */
537static bool ieee80211_can_queue_work(struct ieee80211_local *local)
538{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100539 if (WARN(local->suspended && !local->resuming,
540 "queueing ieee80211 work while going to suspend\n"))
541 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400542
543 return true;
544}
545
546void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
547{
548 struct ieee80211_local *local = hw_to_local(hw);
549
550 if (!ieee80211_can_queue_work(local))
551 return;
552
553 queue_work(local->workqueue, work);
554}
555EXPORT_SYMBOL(ieee80211_queue_work);
556
557void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
558 struct delayed_work *dwork,
559 unsigned long delay)
560{
561 struct ieee80211_local *local = hw_to_local(hw);
562
563 if (!ieee80211_can_queue_work(local))
564 return;
565
566 queue_delayed_work(local->workqueue, dwork, delay);
567}
568EXPORT_SYMBOL(ieee80211_queue_delayed_work);
569
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200570void ieee802_11_parse_elems(u8 *start, size_t len,
571 struct ieee802_11_elems *elems)
572{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200573 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
574}
575
576u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
577 struct ieee802_11_elems *elems,
578 u64 filter, u32 crc)
579{
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200580 size_t left = len;
581 u8 *pos = start;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200582 bool calc_crc = filter != 0;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200583
584 memset(elems, 0, sizeof(*elems));
585 elems->ie_start = start;
586 elems->total_len = len;
587
588 while (left >= 2) {
589 u8 id, elen;
590
591 id = *pos++;
592 elen = *pos++;
593 left -= 2;
594
595 if (elen > left)
Johannes Bergd91f36d2009-04-16 13:17:26 +0200596 break;
597
Vasanthakumar Thiagarajan18140772009-12-04 17:41:34 +0530598 if (calc_crc && id < 64 && (filter & (1ULL << id)))
Johannes Bergd91f36d2009-04-16 13:17:26 +0200599 crc = crc32_be(crc, pos - 2, elen + 2);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200600
601 switch (id) {
602 case WLAN_EID_SSID:
603 elems->ssid = pos;
604 elems->ssid_len = elen;
605 break;
606 case WLAN_EID_SUPP_RATES:
607 elems->supp_rates = pos;
608 elems->supp_rates_len = elen;
609 break;
610 case WLAN_EID_FH_PARAMS:
611 elems->fh_params = pos;
612 elems->fh_params_len = elen;
613 break;
614 case WLAN_EID_DS_PARAMS:
615 elems->ds_params = pos;
616 elems->ds_params_len = elen;
617 break;
618 case WLAN_EID_CF_PARAMS:
619 elems->cf_params = pos;
620 elems->cf_params_len = elen;
621 break;
622 case WLAN_EID_TIM:
Johannes Berge7ec86f2009-04-18 17:33:24 +0200623 if (elen >= sizeof(struct ieee80211_tim_ie)) {
624 elems->tim = (void *)pos;
625 elems->tim_len = elen;
626 }
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200627 break;
628 case WLAN_EID_IBSS_PARAMS:
629 elems->ibss_params = pos;
630 elems->ibss_params_len = elen;
631 break;
632 case WLAN_EID_CHALLENGE:
633 elems->challenge = pos;
634 elems->challenge_len = elen;
635 break;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200636 case WLAN_EID_VENDOR_SPECIFIC:
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200637 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
638 pos[2] == 0xf2) {
639 /* Microsoft OUI (00:50:F2) */
Johannes Bergd91f36d2009-04-16 13:17:26 +0200640
641 if (calc_crc)
642 crc = crc32_be(crc, pos - 2, elen + 2);
643
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200644 if (pos[3] == 1) {
645 /* OUI Type 1 - WPA IE */
646 elems->wpa = pos;
647 elems->wpa_len = elen;
648 } else if (elen >= 5 && pos[3] == 2) {
Johannes Bergd91f36d2009-04-16 13:17:26 +0200649 /* OUI Type 2 - WMM IE */
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200650 if (pos[4] == 0) {
651 elems->wmm_info = pos;
652 elems->wmm_info_len = elen;
653 } else if (pos[4] == 1) {
654 elems->wmm_param = pos;
655 elems->wmm_param_len = elen;
656 }
657 }
658 }
659 break;
660 case WLAN_EID_RSN:
661 elems->rsn = pos;
662 elems->rsn_len = elen;
663 break;
664 case WLAN_EID_ERP_INFO:
665 elems->erp_info = pos;
666 elems->erp_info_len = elen;
667 break;
668 case WLAN_EID_EXT_SUPP_RATES:
669 elems->ext_supp_rates = pos;
670 elems->ext_supp_rates_len = elen;
671 break;
672 case WLAN_EID_HT_CAPABILITY:
Johannes Berg09914812008-10-07 19:31:17 +0200673 if (elen >= sizeof(struct ieee80211_ht_cap))
674 elems->ht_cap_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200675 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200676 case WLAN_EID_HT_INFORMATION:
677 if (elen >= sizeof(struct ieee80211_ht_info))
Johannes Berg09914812008-10-07 19:31:17 +0200678 elems->ht_info_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200679 break;
680 case WLAN_EID_MESH_ID:
681 elems->mesh_id = pos;
682 elems->mesh_id_len = elen;
683 break;
684 case WLAN_EID_MESH_CONFIG:
Rui Paulo136cfa22009-11-18 18:40:00 +0000685 if (elen >= sizeof(struct ieee80211_meshconf_ie))
686 elems->mesh_config = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200687 break;
688 case WLAN_EID_PEER_LINK:
689 elems->peer_link = pos;
690 elems->peer_link_len = elen;
691 break;
692 case WLAN_EID_PREQ:
693 elems->preq = pos;
694 elems->preq_len = elen;
695 break;
696 case WLAN_EID_PREP:
697 elems->prep = pos;
698 elems->prep_len = elen;
699 break;
700 case WLAN_EID_PERR:
701 elems->perr = pos;
702 elems->perr_len = elen;
703 break;
Rui Paulo90a5e162009-11-11 00:01:31 +0000704 case WLAN_EID_RANN:
705 if (elen >= sizeof(struct ieee80211_rann_ie))
706 elems->rann = (void *)pos;
707 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200708 case WLAN_EID_CHANNEL_SWITCH:
709 elems->ch_switch_elem = pos;
710 elems->ch_switch_elem_len = elen;
711 break;
712 case WLAN_EID_QUIET:
713 if (!elems->quiet_elem) {
714 elems->quiet_elem = pos;
715 elems->quiet_elem_len = elen;
716 }
717 elems->num_of_quiet_elem++;
718 break;
719 case WLAN_EID_COUNTRY:
720 elems->country_elem = pos;
721 elems->country_elem_len = elen;
722 break;
723 case WLAN_EID_PWR_CONSTRAINT:
724 elems->pwr_constr_elem = pos;
725 elems->pwr_constr_elem_len = elen;
726 break;
Jouni Malinenf797eb72009-01-19 18:48:46 +0200727 case WLAN_EID_TIMEOUT_INTERVAL:
728 elems->timeout_int = pos;
729 elems->timeout_int_len = elen;
Jouni Malinen63a5ab82009-01-08 13:32:09 +0200730 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200731 default:
732 break;
733 }
734
735 left -= elen;
736 pos += elen;
737 }
Johannes Bergd91f36d2009-04-16 13:17:26 +0200738
739 return crc;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200740}
Johannes Berg5825fe102008-09-09 12:56:01 +0200741
742void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
743{
744 struct ieee80211_local *local = sdata->local;
745 struct ieee80211_tx_queue_params qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200746 int queue;
747 bool use_11b;
748 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200749
750 if (!local->ops->conf_tx)
751 return;
752
753 memset(&qparam, 0, sizeof(qparam));
754
Johannes Bergaa837e12009-05-07 16:16:24 +0200755 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
756 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe102008-09-09 12:56:01 +0200757
Johannes Bergaa837e12009-05-07 16:16:24 +0200758 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
759 /* Set defaults according to 802.11-2007 Table 7-37 */
760 aCWmax = 1023;
761 if (use_11b)
762 aCWmin = 31;
763 else
764 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200765
Johannes Bergaa837e12009-05-07 16:16:24 +0200766 switch (queue) {
767 case 3: /* AC_BK */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200768 qparam.cw_max = aCWmax;
769 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200770 qparam.txop = 0;
771 qparam.aifs = 7;
772 break;
773 default: /* never happens but let's not leave undefined */
774 case 2: /* AC_BE */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200775 qparam.cw_max = aCWmax;
776 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200777 qparam.txop = 0;
778 qparam.aifs = 3;
779 break;
780 case 1: /* AC_VI */
781 qparam.cw_max = aCWmin;
782 qparam.cw_min = (aCWmin + 1) / 2 - 1;
783 if (use_11b)
784 qparam.txop = 6016/32;
785 else
786 qparam.txop = 3008/32;
787 qparam.aifs = 2;
788 break;
789 case 0: /* AC_VO */
790 qparam.cw_max = (aCWmin + 1) / 2 - 1;
791 qparam.cw_min = (aCWmin + 1) / 4 - 1;
792 if (use_11b)
793 qparam.txop = 3264/32;
794 else
795 qparam.txop = 1504/32;
796 qparam.aifs = 2;
797 break;
798 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200799
Kalle Valoab133152010-01-12 10:42:31 +0200800 qparam.uapsd = false;
801
Eliad Peller2683d652011-07-14 20:29:42 +0300802 local->tx_conf[queue] = qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200803 drv_conf_tx(local, queue, &qparam);
804 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200805
806 /* after reinitialize QoS TX queues setting to default,
807 * disable QoS at all */
Sujithd9734972010-07-23 10:47:11 +0530808
809 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
810 sdata->vif.bss_conf.qos =
811 sdata->vif.type != NL80211_IFTYPE_STATION;
812 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
813 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200814}
Johannes Berge50db652008-09-09 15:07:09 +0200815
Johannes Berg46900292009-02-15 12:44:28 +0100816void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
817 const size_t supp_rates_len,
818 const u8 *supp_rates)
819{
820 struct ieee80211_local *local = sdata->local;
821 int i, have_higher_than_11mbit = 0;
822
823 /* cf. IEEE 802.11 9.2.12 */
824 for (i = 0; i < supp_rates_len; i++)
825 if ((supp_rates[i] & 0x7f) * 5 > 110)
826 have_higher_than_11mbit = 1;
827
828 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
829 have_higher_than_11mbit)
830 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
831 else
832 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
833
834 ieee80211_set_wmm_default(sdata);
835}
836
Johannes Berg881d9482009-01-21 15:13:48 +0100837u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200838 enum ieee80211_band band)
839{
840 struct ieee80211_supported_band *sband;
841 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100842 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200843 enum ieee80211_rate_flags mandatory_flag;
844 int i;
845
846 sband = local->hw.wiphy->bands[band];
847 if (!sband) {
848 WARN_ON(1);
849 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
850 }
851
852 if (band == IEEE80211_BAND_2GHZ)
853 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
854 else
855 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
856
857 bitrates = sband->bitrates;
858 mandatory_rates = 0;
859 for (i = 0; i < sband->n_bitrates; i++)
860 if (bitrates[i].flags & mandatory_flag)
861 mandatory_rates |= BIT(i);
862 return mandatory_rates;
863}
Johannes Berg46900292009-02-15 12:44:28 +0100864
865void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
866 u16 transaction, u16 auth_alg,
Johannes Bergfffd0932009-07-08 14:22:54 +0200867 u8 *extra, size_t extra_len, const u8 *bssid,
868 const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100869{
870 struct ieee80211_local *local = sdata->local;
871 struct sk_buff *skb;
872 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +0200873 int err;
Johannes Berg46900292009-02-15 12:44:28 +0100874
875 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200876 sizeof(*mgmt) + 6 + extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100877 if (!skb) {
878 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
Johannes Berg47846c92009-11-25 17:46:19 +0100879 "frame\n", sdata->name);
Johannes Berg46900292009-02-15 12:44:28 +0100880 return;
881 }
882 skb_reserve(skb, local->hw.extra_tx_headroom);
883
884 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
885 memset(mgmt, 0, 24 + 6);
886 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
887 IEEE80211_STYPE_AUTH);
Johannes Berg46900292009-02-15 12:44:28 +0100888 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100890 memcpy(mgmt->bssid, bssid, ETH_ALEN);
891 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
892 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
893 mgmt->u.auth.status_code = cpu_to_le16(0);
894 if (extra)
895 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100896
Johannes Bergfffd0932009-07-08 14:22:54 +0200897 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
898 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
899 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
900 WARN_ON(err);
901 }
902
Johannes Berg62ae67b2009-11-18 18:42:05 +0100903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
904 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +0100905}
906
Johannes Bergde95a542009-04-01 11:58:36 +0200907int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec582009-10-27 20:59:55 +0100908 const u8 *ie, size_t ie_len,
Jouni Malinen651b5222010-08-28 19:37:51 +0300909 enum ieee80211_band band, u32 rate_mask,
910 u8 channel)
Johannes Bergde95a542009-04-01 11:58:36 +0200911{
912 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100913 u8 *pos;
914 size_t offset = 0, noffset;
915 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300916 u8 rates[32];
917 int num_rates;
918 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200919
Johannes Berg4d36ec582009-10-27 20:59:55 +0100920 sband = local->hw.wiphy->bands[band];
Johannes Bergde95a542009-04-01 11:58:36 +0200921
922 pos = buffer;
923
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300924 num_rates = 0;
925 for (i = 0; i < sband->n_bitrates; i++) {
926 if ((BIT(i) & rate_mask) == 0)
927 continue; /* skip rate */
928 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
929 }
930
931 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +0100932
Johannes Bergde95a542009-04-01 11:58:36 +0200933 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100934 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300935 memcpy(pos, rates, supp_rates_len);
936 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200937
Johannes Berg8e664fb2009-12-23 13:15:38 +0100938 /* insert "request information" if in custom IEs */
939 if (ie && ie_len) {
940 static const u8 before_extrates[] = {
941 WLAN_EID_SSID,
942 WLAN_EID_SUPP_RATES,
943 WLAN_EID_REQUEST,
944 };
945 noffset = ieee80211_ie_split(ie, ie_len,
946 before_extrates,
947 ARRAY_SIZE(before_extrates),
948 offset);
949 memcpy(pos, ie + offset, noffset - offset);
950 pos += noffset - offset;
951 offset = noffset;
952 }
Johannes Bergde95a542009-04-01 11:58:36 +0200953
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300954 ext_rates_len = num_rates - supp_rates_len;
955 if (ext_rates_len > 0) {
Johannes Berg8e664fb2009-12-23 13:15:38 +0100956 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300957 *pos++ = ext_rates_len;
958 memcpy(pos, rates + supp_rates_len, ext_rates_len);
959 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100960 }
961
Jouni Malinen651b5222010-08-28 19:37:51 +0300962 if (channel && sband->band == IEEE80211_BAND_2GHZ) {
963 *pos++ = WLAN_EID_DS_PARAMS;
964 *pos++ = 1;
965 *pos++ = channel;
966 }
967
Johannes Berg8e664fb2009-12-23 13:15:38 +0100968 /* insert custom IEs that go before HT */
969 if (ie && ie_len) {
970 static const u8 before_ht[] = {
971 WLAN_EID_SSID,
972 WLAN_EID_SUPP_RATES,
973 WLAN_EID_REQUEST,
974 WLAN_EID_EXT_SUPP_RATES,
975 WLAN_EID_DS_PARAMS,
976 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
977 };
978 noffset = ieee80211_ie_split(ie, ie_len,
979 before_ht, ARRAY_SIZE(before_ht),
980 offset);
981 memcpy(pos, ie + offset, noffset - offset);
982 pos += noffset - offset;
983 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +0200984 }
985
Johannes Berg5ef2d412009-03-31 12:12:07 +0200986 if (sband->ht_cap.ht_supported) {
Johannes Bergf38fd122009-12-01 18:29:42 +0100987 u16 cap = sband->ht_cap.cap;
988 __le16 tmp;
989
Johannes Berg5ef2d412009-03-31 12:12:07 +0200990 *pos++ = WLAN_EID_HT_CAPABILITY;
991 *pos++ = sizeof(struct ieee80211_ht_cap);
992 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
Johannes Bergf38fd122009-12-01 18:29:42 +0100993 tmp = cpu_to_le16(cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200994 memcpy(pos, &tmp, sizeof(u16));
995 pos += sizeof(u16);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200996 *pos++ = sband->ht_cap.ampdu_factor |
Johannes Bergf38fd122009-12-01 18:29:42 +0100997 (sband->ht_cap.ampdu_density <<
998 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200999 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
1000 pos += sizeof(sband->ht_cap.mcs);
1001 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
1002 }
1003
Johannes Bergde95a542009-04-01 11:58:36 +02001004 /*
1005 * If adding more here, adjust code in main.c
1006 * that calculates local->scan_ies_len.
1007 */
1008
Johannes Berg8e664fb2009-12-23 13:15:38 +01001009 /* add any remaining custom IEs */
1010 if (ie && ie_len) {
1011 noffset = ie_len;
1012 memcpy(pos, ie + offset, noffset - offset);
1013 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001014 }
1015
1016 return pos - buffer;
1017}
1018
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001019struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1020 u8 *dst,
1021 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001022 const u8 *ie, size_t ie_len,
1023 bool directed)
Johannes Berg46900292009-02-15 12:44:28 +01001024{
1025 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001026 struct sk_buff *skb;
1027 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001028 size_t buf_len;
1029 u8 *buf;
Jouni Malinen651b5222010-08-28 19:37:51 +03001030 u8 chan;
Johannes Berg46900292009-02-15 12:44:28 +01001031
Kalle Valo7c12ce82010-01-05 20:16:44 +02001032 /* FIXME: come up with a proper value */
1033 buf = kmalloc(200 + ie_len, GFP_KERNEL);
1034 if (!buf) {
1035 printk(KERN_DEBUG "%s: failed to allocate temporary IE "
1036 "buffer\n", sdata->name);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001037 return NULL;
Johannes Berg46900292009-02-15 12:44:28 +01001038 }
Johannes Berg46900292009-02-15 12:44:28 +01001039
Paul Stewarta806c552011-06-23 09:00:11 -08001040 /*
1041 * Do not send DS Channel parameter for directed probe requests
1042 * in order to maximize the chance that we get a response. Some
1043 * badly-behaved APs don't respond when this parameter is included.
1044 */
1045 if (directed)
1046 chan = 0;
1047 else
1048 chan = ieee80211_frequency_to_channel(
1049 local->hw.conf.channel->center_freq);
Jouni Malinen651b5222010-08-28 19:37:51 +03001050
Kalle Valo7c12ce82010-01-05 20:16:44 +02001051 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001052 local->hw.conf.channel->band,
1053 sdata->rc_rateidx_mask
Jouni Malinen651b5222010-08-28 19:37:51 +03001054 [local->hw.conf.channel->band],
1055 chan);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001056
1057 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1058 ssid, ssid_len,
1059 buf, buf_len);
1060
Johannes Berg46900292009-02-15 12:44:28 +01001061 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001062 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001063 memcpy(mgmt->da, dst, ETH_ALEN);
1064 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001065 }
Johannes Berg46900292009-02-15 12:44:28 +01001066
Johannes Berg62ae67b2009-11-18 18:42:05 +01001067 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Ming Lei145b6d12010-01-15 21:44:21 +08001068 kfree(buf);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001069
1070 return skb;
1071}
1072
1073void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1074 const u8 *ssid, size_t ssid_len,
Paul Stewarta806c552011-06-23 09:00:11 -08001075 const u8 *ie, size_t ie_len,
1076 bool directed)
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001077{
1078 struct sk_buff *skb;
1079
Paul Stewarta806c552011-06-23 09:00:11 -08001080 skb = ieee80211_build_probe_req(sdata, dst, ssid, ssid_len, ie, ie_len,
1081 directed);
Juuso Oikarinena619a4c2010-11-11 08:50:18 +02001082 if (skb)
1083 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001084}
1085
1086u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1087 struct ieee802_11_elems *elems,
1088 enum ieee80211_band band)
1089{
1090 struct ieee80211_supported_band *sband;
1091 struct ieee80211_rate *bitrates;
1092 size_t num_rates;
1093 u32 supp_rates;
1094 int i, j;
1095 sband = local->hw.wiphy->bands[band];
1096
1097 if (!sband) {
1098 WARN_ON(1);
1099 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1100 }
1101
1102 bitrates = sband->bitrates;
1103 num_rates = sband->n_bitrates;
1104 supp_rates = 0;
1105 for (i = 0; i < elems->supp_rates_len +
1106 elems->ext_supp_rates_len; i++) {
1107 u8 rate = 0;
1108 int own_rate;
1109 if (i < elems->supp_rates_len)
1110 rate = elems->supp_rates[i];
1111 else if (elems->ext_supp_rates)
1112 rate = elems->ext_supp_rates
1113 [i - elems->supp_rates_len];
1114 own_rate = 5 * (rate & 0x7f);
1115 for (j = 0; j < num_rates; j++)
1116 if (bitrates[j].bitrate == own_rate)
1117 supp_rates |= BIT(j);
1118 }
1119 return supp_rates;
1120}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001121
Johannes Berg84f6a012009-08-20 20:02:20 +02001122void ieee80211_stop_device(struct ieee80211_local *local)
1123{
1124 ieee80211_led_radio(local, false);
Johannes Berg67408c82010-11-30 08:59:23 +01001125 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
Johannes Berg84f6a012009-08-20 20:02:20 +02001126
1127 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001128
1129 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001130 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001131}
1132
Johannes Bergf2753dd2009-04-14 10:09:24 +02001133int ieee80211_reconfig(struct ieee80211_local *local)
1134{
1135 struct ieee80211_hw *hw = &local->hw;
1136 struct ieee80211_sub_if_data *sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001137 struct sta_info *sta;
Eliad Peller2683d652011-07-14 20:29:42 +03001138 int res, i;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001139
Johannes Bergeecc4802011-05-04 15:37:29 +02001140#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001141 if (local->suspended)
1142 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001143
Johannes Bergeecc4802011-05-04 15:37:29 +02001144 if (local->wowlan) {
1145 local->wowlan = false;
1146 res = drv_resume(local);
1147 if (res < 0) {
1148 local->resuming = false;
1149 return res;
1150 }
1151 if (res == 0)
1152 goto wake_up;
1153 WARN_ON(res > 1);
1154 /*
1155 * res is 1, which means the driver requested
1156 * to go through a regular reset on wakeup.
1157 */
1158 }
1159#endif
1160
Johannes Berg94f9b972011-07-14 16:48:54 +02001161 /* setup fragmentation threshold */
1162 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001163
Johannes Berg94f9b972011-07-14 16:48:54 +02001164 /* setup RTS threshold */
1165 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1166
1167 /* reset coverage class */
1168 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1169
1170 /* everything else happens only if HW was up & running */
1171 if (!local->open_count)
1172 goto wake_up;
1173
1174 /*
1175 * Upon resume hardware can sometimes be goofy due to
1176 * various platform / driver / bus issues, so restarting
1177 * the device may at times not work immediately. Propagate
1178 * the error.
1179 */
1180 res = drv_start(local);
1181 if (res) {
1182 WARN(local->suspended, "Hardware became unavailable "
1183 "upon resume. This could be a software issue "
1184 "prior to suspend or a hardware issue.\n");
1185 return res;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001186 }
1187
Johannes Berg94f9b972011-07-14 16:48:54 +02001188 ieee80211_led_radio(local, true);
1189 ieee80211_mod_tpt_led_trig(local,
1190 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1191
Johannes Bergf2753dd2009-04-14 10:09:24 +02001192 /* add interfaces */
1193 list_for_each_entry(sdata, &local->interfaces, list) {
1194 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1195 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001196 ieee80211_sdata_running(sdata))
1197 res = drv_add_interface(local, &sdata->vif);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001198 }
1199
1200 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001201 mutex_lock(&local->sta_mtx);
1202 list_for_each_entry(sta, &local->sta_list, list) {
1203 if (sta->uploaded) {
Johannes Berg5bb644a2009-05-17 11:40:42 +02001204 sdata = sta->sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001205 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1206 sdata = container_of(sdata->bss,
1207 struct ieee80211_sub_if_data,
1208 u.ap);
1209
Johannes Berg34e89502010-02-03 13:59:58 +01001210 WARN_ON(drv_sta_add(local, sdata, &sta->sta));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001211 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001212 }
Johannes Berg34e89502010-02-03 13:59:58 +01001213 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001214
Eliad Peller2683d652011-07-14 20:29:42 +03001215 /* reconfigure tx conf */
1216 for (i = 0; i < hw->queues; i++)
1217 drv_conf_tx(local, i, &local->tx_conf[i]);
1218
Johannes Bergf2753dd2009-04-14 10:09:24 +02001219 /* reconfigure hardware */
1220 ieee80211_hw_config(local, ~0);
1221
Johannes Bergf2753dd2009-04-14 10:09:24 +02001222 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001223
1224 /* Finally also reconfigure all the BSS information */
1225 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001226 u32 changed;
1227
Johannes Berg9607e6b2009-12-23 13:15:31 +01001228 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001229 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001230
1231 /* common change flags for all interface types */
1232 changed = BSS_CHANGED_ERP_CTS_PROT |
1233 BSS_CHANGED_ERP_PREAMBLE |
1234 BSS_CHANGED_ERP_SLOT |
1235 BSS_CHANGED_HT |
1236 BSS_CHANGED_BASIC_RATES |
1237 BSS_CHANGED_BEACON_INT |
1238 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001239 BSS_CHANGED_CQM |
1240 BSS_CHANGED_QOS;
Johannes Bergac8dd502010-05-05 09:44:02 +02001241
Johannes Bergf2753dd2009-04-14 10:09:24 +02001242 switch (sdata->vif.type) {
1243 case NL80211_IFTYPE_STATION:
Johannes Bergac8dd502010-05-05 09:44:02 +02001244 changed |= BSS_CHANGED_ASSOC;
Eliad Pellera7b545f2011-02-08 18:43:19 +02001245 mutex_lock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001246 ieee80211_bss_info_change_notify(sdata, changed);
Eliad Pellera7b545f2011-02-08 18:43:19 +02001247 mutex_unlock(&sdata->u.mgd.mtx);
Johannes Bergac8dd502010-05-05 09:44:02 +02001248 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001249 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001250 changed |= BSS_CHANGED_IBSS;
1251 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001252 case NL80211_IFTYPE_AP:
1253 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001254 changed |= BSS_CHANGED_BEACON |
1255 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001256 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001257 break;
1258 case NL80211_IFTYPE_WDS:
1259 break;
1260 case NL80211_IFTYPE_AP_VLAN:
1261 case NL80211_IFTYPE_MONITOR:
1262 /* ignore virtual */
1263 break;
1264 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001265 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001266 case NL80211_IFTYPE_P2P_CLIENT:
1267 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001268 WARN_ON(1);
1269 break;
1270 }
1271 }
1272
Johannes Berg2a419052010-06-10 10:21:29 +02001273 /*
1274 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1275 * sessions can be established after a resume.
1276 *
1277 * Also tear down aggregation sessions since reconfiguring
1278 * them in a hardware restart scenario is not easily done
1279 * right now, and the hardware will have lost information
1280 * about the sessions, but we and the AP still think they
1281 * are active. This is really a workaround though.
1282 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001283 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001284 mutex_lock(&local->sta_mtx);
1285
1286 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg53f73c02010-10-05 19:37:40 +02001287 ieee80211_sta_tear_down_BA_sessions(sta, true);
Johannes Berg2a419052010-06-10 10:21:29 +02001288 clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001289 }
Johannes Berg2a419052010-06-10 10:21:29 +02001290
1291 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001292 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001293
Johannes Bergf2753dd2009-04-14 10:09:24 +02001294 /* add back keys */
1295 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg9607e6b2009-12-23 13:15:31 +01001296 if (ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001297 ieee80211_enable_keys(sdata);
1298
Johannes Bergeecc4802011-05-04 15:37:29 +02001299 wake_up:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001300 ieee80211_wake_queues_by_reason(hw,
1301 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1302
Johannes Berg5bb644a2009-05-17 11:40:42 +02001303 /*
1304 * If this is for hw restart things are still running.
1305 * We may want to change that later, however.
1306 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001307 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001308 return 0;
1309
1310#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001311 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001312 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001313 mb();
1314 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001315
1316 list_for_each_entry(sdata, &local->interfaces, list) {
1317 switch(sdata->vif.type) {
1318 case NL80211_IFTYPE_STATION:
1319 ieee80211_sta_restart(sdata);
1320 break;
1321 case NL80211_IFTYPE_ADHOC:
1322 ieee80211_ibss_restart(sdata);
1323 break;
1324 case NL80211_IFTYPE_MESH_POINT:
1325 ieee80211_mesh_restart(sdata);
1326 break;
1327 default:
1328 break;
1329 }
1330 }
1331
Johannes Berg26d59532011-04-01 13:52:48 +02001332 mod_timer(&local->sta_cleanup, jiffies + 1);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001333
Johannes Berg34e89502010-02-03 13:59:58 +01001334 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001335 list_for_each_entry(sta, &local->sta_list, list)
1336 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001337 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001338#else
1339 WARN_ON(1);
1340#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001341 return 0;
1342}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001343
Johannes Berg95acac62011-07-12 12:30:59 +02001344void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1345{
1346 struct ieee80211_sub_if_data *sdata;
1347 struct ieee80211_local *local;
1348 struct ieee80211_key *key;
1349
1350 if (WARN_ON(!vif))
1351 return;
1352
1353 sdata = vif_to_sdata(vif);
1354 local = sdata->local;
1355
1356 if (WARN_ON(!local->resuming))
1357 return;
1358
1359 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1360 return;
1361
1362 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1363
1364 mutex_lock(&local->key_mtx);
1365 list_for_each_entry(key, &sdata->key_list, list)
1366 key->flags |= KEY_FLAG_TAINTED;
1367 mutex_unlock(&local->key_mtx);
1368}
1369EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1370
Johannes Berg0f782312009-12-01 13:37:02 +01001371static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1372 enum ieee80211_smps_mode *smps_mode)
1373{
1374 if (ifmgd->associated) {
1375 *smps_mode = ifmgd->ap_smps;
1376
1377 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1378 if (ifmgd->powersave)
1379 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1380 else
1381 *smps_mode = IEEE80211_SMPS_OFF;
1382 }
1383
1384 return 1;
1385 }
1386
1387 return 0;
1388}
1389
1390/* must hold iflist_mtx */
Johannes Berg025e6be2010-10-05 10:41:47 +02001391void ieee80211_recalc_smps(struct ieee80211_local *local)
Johannes Berg0f782312009-12-01 13:37:02 +01001392{
1393 struct ieee80211_sub_if_data *sdata;
1394 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1395 int count = 0;
1396
Johannes Berg46a5eba2010-09-15 13:28:15 +02001397 lockdep_assert_held(&local->iflist_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001398
1399 /*
1400 * This function could be improved to handle multiple
1401 * interfaces better, but right now it makes any
1402 * non-station interfaces force SM PS to be turned
1403 * off. If there are multiple station interfaces it
1404 * could also use the best possible mode, e.g. if
1405 * one is in static and the other in dynamic then
1406 * dynamic is ok.
1407 */
1408
1409 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg26a58452010-08-27 12:35:55 +02001410 if (!ieee80211_sdata_running(sdata))
Johannes Berg0f782312009-12-01 13:37:02 +01001411 continue;
1412 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1413 goto set;
Johannes Berg025e6be2010-10-05 10:41:47 +02001414
1415 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
Johannes Berg0f782312009-12-01 13:37:02 +01001416
1417 if (count > 1) {
1418 smps_mode = IEEE80211_SMPS_OFF;
1419 break;
1420 }
1421 }
1422
1423 if (smps_mode == local->smps_mode)
1424 return;
1425
1426 set:
1427 local->smps_mode = smps_mode;
1428 /* changed flag is auto-detected for this */
1429 ieee80211_hw_config(local, 0);
1430}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001431
1432static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1433{
1434 int i;
1435
1436 for (i = 0; i < n_ids; i++)
1437 if (ids[i] == id)
1438 return true;
1439 return false;
1440}
1441
1442/**
1443 * ieee80211_ie_split - split an IE buffer according to ordering
1444 *
1445 * @ies: the IE buffer
1446 * @ielen: the length of the IE buffer
1447 * @ids: an array with element IDs that are allowed before
1448 * the split
1449 * @n_ids: the size of the element ID array
1450 * @offset: offset where to start splitting in the buffer
1451 *
1452 * This function splits an IE buffer by updating the @offset
1453 * variable to point to the location where the buffer should be
1454 * split.
1455 *
1456 * It assumes that the given IE buffer is well-formed, this
1457 * has to be guaranteed by the caller!
1458 *
1459 * It also assumes that the IEs in the buffer are ordered
1460 * correctly, if not the result of using this function will not
1461 * be ordered correctly either, i.e. it does no reordering.
1462 *
1463 * The function returns the offset where the next part of the
1464 * buffer starts, which may be @ielen if the entire (remainder)
1465 * of the buffer should be used.
1466 */
1467size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1468 const u8 *ids, int n_ids, size_t offset)
1469{
1470 size_t pos = offset;
1471
1472 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1473 pos += 2 + ies[pos + 1];
1474
1475 return pos;
1476}
1477
1478size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1479{
1480 size_t pos = offset;
1481
1482 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1483 pos += 2 + ies[pos + 1];
1484
1485 return pos;
1486}
Meenakshi Venkataraman615f7b92011-07-08 08:46:22 -07001487
1488static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
1489 int rssi_min_thold,
1490 int rssi_max_thold)
1491{
1492 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
1493
1494 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
1495 return;
1496
1497 /*
1498 * Scale up threshold values before storing it, as the RSSI averaging
1499 * algorithm uses a scaled up value as well. Change this scaling
1500 * factor if the RSSI averaging algorithm changes.
1501 */
1502 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
1503 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
1504}
1505
1506void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
1507 int rssi_min_thold,
1508 int rssi_max_thold)
1509{
1510 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1511
1512 WARN_ON(rssi_min_thold == rssi_max_thold ||
1513 rssi_min_thold > rssi_max_thold);
1514
1515 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
1516 rssi_max_thold);
1517}
1518EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
1519
1520void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
1521{
1522 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1523
1524 _ieee80211_enable_rssi_reports(sdata, 0, 0);
1525}
1526EXPORT_SYMBOL(ieee80211_disable_rssi_reports);