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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>
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 Berge4e72fb2009-03-23 17:28:42 +0100273 if (WARN_ON(queue >= hw->queues))
274 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200275
Johannes Berg96f5e662009-02-12 00:51:53 +0100276 __clear_bit(reason, &local->queue_stop_reasons[queue]);
277
278 if (local->queue_stop_reasons[queue] != 0)
279 /* someone still has this queue stopped */
280 return;
281
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200282 if (!skb_queue_empty(&local->pending[queue]))
283 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100284
285 rcu_read_lock();
286 list_for_each_entry_rcu(sdata, &local->interfaces, list)
287 netif_tx_wake_queue(netdev_get_tx_queue(sdata->dev, queue));
288 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200289}
Kalle Valoce7c9112008-12-18 23:35:20 +0200290
Johannes Berg96f5e662009-02-12 00:51:53 +0100291void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
292 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200293{
294 struct ieee80211_local *local = hw_to_local(hw);
295 unsigned long flags;
296
297 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
298 __ieee80211_wake_queue(hw, queue, reason);
299 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
300}
301
302void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
303{
304 ieee80211_wake_queue_by_reason(hw, queue,
305 IEEE80211_QUEUE_STOP_REASON_DRIVER);
306}
Johannes Bergc2d15602007-07-27 15:43:23 +0200307EXPORT_SYMBOL(ieee80211_wake_queue);
308
Kalle Valoce7c9112008-12-18 23:35:20 +0200309static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
310 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200311{
312 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100313 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200314
Johannes Berge4e72fb2009-03-23 17:28:42 +0100315 if (WARN_ON(queue >= hw->queues))
316 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100317
Johannes Berg2a577d92009-03-23 17:28:37 +0100318 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100319
320 rcu_read_lock();
321 list_for_each_entry_rcu(sdata, &local->interfaces, list)
322 netif_tx_stop_queue(netdev_get_tx_queue(sdata->dev, queue));
323 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200324}
Kalle Valoce7c9112008-12-18 23:35:20 +0200325
Johannes Berg96f5e662009-02-12 00:51:53 +0100326void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
327 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200328{
329 struct ieee80211_local *local = hw_to_local(hw);
330 unsigned long flags;
331
332 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
333 __ieee80211_stop_queue(hw, queue, reason);
334 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
335}
336
337void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
338{
339 ieee80211_stop_queue_by_reason(hw, queue,
340 IEEE80211_QUEUE_STOP_REASON_DRIVER);
341}
Johannes Bergc2d15602007-07-27 15:43:23 +0200342EXPORT_SYMBOL(ieee80211_stop_queue);
343
Johannes Berg8f77f382009-06-07 21:58:37 +0200344void ieee80211_add_pending_skb(struct ieee80211_local *local,
345 struct sk_buff *skb)
346{
347 struct ieee80211_hw *hw = &local->hw;
348 unsigned long flags;
349 int queue = skb_get_queue_mapping(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200350 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
351
352 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200353 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200354 return;
355 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200356
357 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
358 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200359 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200360 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
361 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
362}
363
364int ieee80211_add_pending_skbs(struct ieee80211_local *local,
365 struct sk_buff_head *skbs)
366{
367 struct ieee80211_hw *hw = &local->hw;
368 struct sk_buff *skb;
369 unsigned long flags;
370 int queue, ret = 0, i;
371
372 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
373 for (i = 0; i < hw->queues; i++)
374 __ieee80211_stop_queue(hw, i,
375 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
376
377 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200378 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
379
380 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200381 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200382 continue;
383 }
384
Johannes Berg8f77f382009-06-07 21:58:37 +0200385 ret++;
386 queue = skb_get_queue_mapping(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200387 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200388 }
389
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200390 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200391 __ieee80211_wake_queue(hw, i,
392 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg8f77f382009-06-07 21:58:37 +0200393 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
394
395 return ret;
396}
397
Kalle Valoce7c9112008-12-18 23:35:20 +0200398void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
399 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200400{
Kalle Valoce7c9112008-12-18 23:35:20 +0200401 struct ieee80211_local *local = hw_to_local(hw);
402 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200403 int i;
404
Kalle Valoce7c9112008-12-18 23:35:20 +0200405 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
406
Johannes Berg96f5e662009-02-12 00:51:53 +0100407 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200408 __ieee80211_stop_queue(hw, i, reason);
409
410 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
411}
412
413void ieee80211_stop_queues(struct ieee80211_hw *hw)
414{
415 ieee80211_stop_queues_by_reason(hw,
416 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200417}
418EXPORT_SYMBOL(ieee80211_stop_queues);
419
Tomas Winkler92ab8532008-07-24 21:02:04 +0300420int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
421{
422 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200423 unsigned long flags;
424 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100425
Johannes Berge4e72fb2009-03-23 17:28:42 +0100426 if (WARN_ON(queue >= hw->queues))
427 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100428
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200429 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
430 ret = !!local->queue_stop_reasons[queue];
431 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
432 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300433}
434EXPORT_SYMBOL(ieee80211_queue_stopped);
435
Kalle Valoce7c9112008-12-18 23:35:20 +0200436void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
437 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200438{
Kalle Valoce7c9112008-12-18 23:35:20 +0200439 struct ieee80211_local *local = hw_to_local(hw);
440 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200441 int i;
442
Kalle Valoce7c9112008-12-18 23:35:20 +0200443 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
444
Johannes Berge4e72fb2009-03-23 17:28:42 +0100445 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200446 __ieee80211_wake_queue(hw, i, reason);
447
448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
449}
450
451void ieee80211_wake_queues(struct ieee80211_hw *hw)
452{
453 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200454}
455EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100456
Johannes Berg32bfd352007-12-19 01:31:26 +0100457void ieee80211_iterate_active_interfaces(
458 struct ieee80211_hw *hw,
459 void (*iterator)(void *data, u8 *mac,
460 struct ieee80211_vif *vif),
461 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100462{
463 struct ieee80211_local *local = hw_to_local(hw);
464 struct ieee80211_sub_if_data *sdata;
465
Johannes Bergc771c9d2009-01-23 22:54:03 +0100466 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200467
468 list_for_each_entry(sdata, &local->interfaces, list) {
469 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200470 case __NL80211_IFTYPE_AFTER_LAST:
471 case NL80211_IFTYPE_UNSPECIFIED:
472 case NL80211_IFTYPE_MONITOR:
473 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200474 continue;
Johannes Berg05c914f2008-09-11 00:01:58 +0200475 case NL80211_IFTYPE_AP:
476 case NL80211_IFTYPE_STATION:
477 case NL80211_IFTYPE_ADHOC:
478 case NL80211_IFTYPE_WDS:
479 case NL80211_IFTYPE_MESH_POINT:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200480 break;
481 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100482 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100483 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200484 &sdata->vif);
485 }
486
Johannes Bergc771c9d2009-01-23 22:54:03 +0100487 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200488}
489EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
490
491void ieee80211_iterate_active_interfaces_atomic(
492 struct ieee80211_hw *hw,
493 void (*iterator)(void *data, u8 *mac,
494 struct ieee80211_vif *vif),
495 void *data)
496{
497 struct ieee80211_local *local = hw_to_local(hw);
498 struct ieee80211_sub_if_data *sdata;
499
Johannes Berge38bad42007-11-28 10:55:32 +0100500 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100501
Johannes Berge38bad42007-11-28 10:55:32 +0100502 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100503 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200504 case __NL80211_IFTYPE_AFTER_LAST:
505 case NL80211_IFTYPE_UNSPECIFIED:
506 case NL80211_IFTYPE_MONITOR:
507 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100508 continue;
Johannes Berg05c914f2008-09-11 00:01:58 +0200509 case NL80211_IFTYPE_AP:
510 case NL80211_IFTYPE_STATION:
511 case NL80211_IFTYPE_ADHOC:
512 case NL80211_IFTYPE_WDS:
513 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergdabeb342007-11-09 01:57:29 +0100514 break;
515 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100516 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100517 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100518 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100519 }
Johannes Berge38bad42007-11-28 10:55:32 +0100520
521 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100522}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200523EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200524
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400525/*
526 * Nothing should have been stuffed into the workqueue during
527 * the suspend->resume cycle. If this WARN is seen then there
528 * is a bug with either the driver suspend or something in
529 * mac80211 stuffing into the workqueue which we haven't yet
530 * cleared during mac80211's suspend cycle.
531 */
532static bool ieee80211_can_queue_work(struct ieee80211_local *local)
533{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100534 if (WARN(local->suspended && !local->resuming,
535 "queueing ieee80211 work while going to suspend\n"))
536 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400537
538 return true;
539}
540
541void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
542{
543 struct ieee80211_local *local = hw_to_local(hw);
544
545 if (!ieee80211_can_queue_work(local))
546 return;
547
548 queue_work(local->workqueue, work);
549}
550EXPORT_SYMBOL(ieee80211_queue_work);
551
552void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
553 struct delayed_work *dwork,
554 unsigned long delay)
555{
556 struct ieee80211_local *local = hw_to_local(hw);
557
558 if (!ieee80211_can_queue_work(local))
559 return;
560
561 queue_delayed_work(local->workqueue, dwork, delay);
562}
563EXPORT_SYMBOL(ieee80211_queue_delayed_work);
564
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200565void ieee802_11_parse_elems(u8 *start, size_t len,
566 struct ieee802_11_elems *elems)
567{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200568 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
569}
570
571u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
572 struct ieee802_11_elems *elems,
573 u64 filter, u32 crc)
574{
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200575 size_t left = len;
576 u8 *pos = start;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200577 bool calc_crc = filter != 0;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200578
579 memset(elems, 0, sizeof(*elems));
580 elems->ie_start = start;
581 elems->total_len = len;
582
583 while (left >= 2) {
584 u8 id, elen;
585
586 id = *pos++;
587 elen = *pos++;
588 left -= 2;
589
590 if (elen > left)
Johannes Bergd91f36d2009-04-16 13:17:26 +0200591 break;
592
Vasanthakumar Thiagarajan18140772009-12-04 17:41:34 +0530593 if (calc_crc && id < 64 && (filter & (1ULL << id)))
Johannes Bergd91f36d2009-04-16 13:17:26 +0200594 crc = crc32_be(crc, pos - 2, elen + 2);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200595
596 switch (id) {
597 case WLAN_EID_SSID:
598 elems->ssid = pos;
599 elems->ssid_len = elen;
600 break;
601 case WLAN_EID_SUPP_RATES:
602 elems->supp_rates = pos;
603 elems->supp_rates_len = elen;
604 break;
605 case WLAN_EID_FH_PARAMS:
606 elems->fh_params = pos;
607 elems->fh_params_len = elen;
608 break;
609 case WLAN_EID_DS_PARAMS:
610 elems->ds_params = pos;
611 elems->ds_params_len = elen;
612 break;
613 case WLAN_EID_CF_PARAMS:
614 elems->cf_params = pos;
615 elems->cf_params_len = elen;
616 break;
617 case WLAN_EID_TIM:
Johannes Berge7ec86f2009-04-18 17:33:24 +0200618 if (elen >= sizeof(struct ieee80211_tim_ie)) {
619 elems->tim = (void *)pos;
620 elems->tim_len = elen;
621 }
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200622 break;
623 case WLAN_EID_IBSS_PARAMS:
624 elems->ibss_params = pos;
625 elems->ibss_params_len = elen;
626 break;
627 case WLAN_EID_CHALLENGE:
628 elems->challenge = pos;
629 elems->challenge_len = elen;
630 break;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200631 case WLAN_EID_VENDOR_SPECIFIC:
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200632 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
633 pos[2] == 0xf2) {
634 /* Microsoft OUI (00:50:F2) */
Johannes Bergd91f36d2009-04-16 13:17:26 +0200635
636 if (calc_crc)
637 crc = crc32_be(crc, pos - 2, elen + 2);
638
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200639 if (pos[3] == 1) {
640 /* OUI Type 1 - WPA IE */
641 elems->wpa = pos;
642 elems->wpa_len = elen;
643 } else if (elen >= 5 && pos[3] == 2) {
Johannes Bergd91f36d2009-04-16 13:17:26 +0200644 /* OUI Type 2 - WMM IE */
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200645 if (pos[4] == 0) {
646 elems->wmm_info = pos;
647 elems->wmm_info_len = elen;
648 } else if (pos[4] == 1) {
649 elems->wmm_param = pos;
650 elems->wmm_param_len = elen;
651 }
652 }
653 }
654 break;
655 case WLAN_EID_RSN:
656 elems->rsn = pos;
657 elems->rsn_len = elen;
658 break;
659 case WLAN_EID_ERP_INFO:
660 elems->erp_info = pos;
661 elems->erp_info_len = elen;
662 break;
663 case WLAN_EID_EXT_SUPP_RATES:
664 elems->ext_supp_rates = pos;
665 elems->ext_supp_rates_len = elen;
666 break;
667 case WLAN_EID_HT_CAPABILITY:
Johannes Berg09914812008-10-07 19:31:17 +0200668 if (elen >= sizeof(struct ieee80211_ht_cap))
669 elems->ht_cap_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200670 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200671 case WLAN_EID_HT_INFORMATION:
672 if (elen >= sizeof(struct ieee80211_ht_info))
Johannes Berg09914812008-10-07 19:31:17 +0200673 elems->ht_info_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200674 break;
675 case WLAN_EID_MESH_ID:
676 elems->mesh_id = pos;
677 elems->mesh_id_len = elen;
678 break;
679 case WLAN_EID_MESH_CONFIG:
Rui Paulo136cfa22009-11-18 18:40:00 +0000680 if (elen >= sizeof(struct ieee80211_meshconf_ie))
681 elems->mesh_config = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200682 break;
683 case WLAN_EID_PEER_LINK:
684 elems->peer_link = pos;
685 elems->peer_link_len = elen;
686 break;
687 case WLAN_EID_PREQ:
688 elems->preq = pos;
689 elems->preq_len = elen;
690 break;
691 case WLAN_EID_PREP:
692 elems->prep = pos;
693 elems->prep_len = elen;
694 break;
695 case WLAN_EID_PERR:
696 elems->perr = pos;
697 elems->perr_len = elen;
698 break;
Rui Paulo90a5e162009-11-11 00:01:31 +0000699 case WLAN_EID_RANN:
700 if (elen >= sizeof(struct ieee80211_rann_ie))
701 elems->rann = (void *)pos;
702 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200703 case WLAN_EID_CHANNEL_SWITCH:
704 elems->ch_switch_elem = pos;
705 elems->ch_switch_elem_len = elen;
706 break;
707 case WLAN_EID_QUIET:
708 if (!elems->quiet_elem) {
709 elems->quiet_elem = pos;
710 elems->quiet_elem_len = elen;
711 }
712 elems->num_of_quiet_elem++;
713 break;
714 case WLAN_EID_COUNTRY:
715 elems->country_elem = pos;
716 elems->country_elem_len = elen;
717 break;
718 case WLAN_EID_PWR_CONSTRAINT:
719 elems->pwr_constr_elem = pos;
720 elems->pwr_constr_elem_len = elen;
721 break;
Jouni Malinenf797eb72009-01-19 18:48:46 +0200722 case WLAN_EID_TIMEOUT_INTERVAL:
723 elems->timeout_int = pos;
724 elems->timeout_int_len = elen;
Jouni Malinen63a5ab82009-01-08 13:32:09 +0200725 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200726 default:
727 break;
728 }
729
730 left -= elen;
731 pos += elen;
732 }
Johannes Bergd91f36d2009-04-16 13:17:26 +0200733
734 return crc;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200735}
Johannes Berg5825fe102008-09-09 12:56:01 +0200736
737void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
738{
739 struct ieee80211_local *local = sdata->local;
740 struct ieee80211_tx_queue_params qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200741 int queue;
742 bool use_11b;
743 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200744
745 if (!local->ops->conf_tx)
746 return;
747
748 memset(&qparam, 0, sizeof(qparam));
749
Johannes Bergaa837e12009-05-07 16:16:24 +0200750 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
751 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe102008-09-09 12:56:01 +0200752
Johannes Bergaa837e12009-05-07 16:16:24 +0200753 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
754 /* Set defaults according to 802.11-2007 Table 7-37 */
755 aCWmax = 1023;
756 if (use_11b)
757 aCWmin = 31;
758 else
759 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200760
Johannes Bergaa837e12009-05-07 16:16:24 +0200761 switch (queue) {
762 case 3: /* AC_BK */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200763 qparam.cw_max = aCWmax;
764 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200765 qparam.txop = 0;
766 qparam.aifs = 7;
767 break;
768 default: /* never happens but let's not leave undefined */
769 case 2: /* AC_BE */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200770 qparam.cw_max = aCWmax;
771 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200772 qparam.txop = 0;
773 qparam.aifs = 3;
774 break;
775 case 1: /* AC_VI */
776 qparam.cw_max = aCWmin;
777 qparam.cw_min = (aCWmin + 1) / 2 - 1;
778 if (use_11b)
779 qparam.txop = 6016/32;
780 else
781 qparam.txop = 3008/32;
782 qparam.aifs = 2;
783 break;
784 case 0: /* AC_VO */
785 qparam.cw_max = (aCWmin + 1) / 2 - 1;
786 qparam.cw_min = (aCWmin + 1) / 4 - 1;
787 if (use_11b)
788 qparam.txop = 3264/32;
789 else
790 qparam.txop = 1504/32;
791 qparam.aifs = 2;
792 break;
793 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200794
Kalle Valoab133152010-01-12 10:42:31 +0200795 qparam.uapsd = false;
796
Johannes Bergaa837e12009-05-07 16:16:24 +0200797 drv_conf_tx(local, queue, &qparam);
798 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200799}
Johannes Berge50db652008-09-09 15:07:09 +0200800
Johannes Berg46900292009-02-15 12:44:28 +0100801void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
802 const size_t supp_rates_len,
803 const u8 *supp_rates)
804{
805 struct ieee80211_local *local = sdata->local;
806 int i, have_higher_than_11mbit = 0;
807
808 /* cf. IEEE 802.11 9.2.12 */
809 for (i = 0; i < supp_rates_len; i++)
810 if ((supp_rates[i] & 0x7f) * 5 > 110)
811 have_higher_than_11mbit = 1;
812
813 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
814 have_higher_than_11mbit)
815 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
816 else
817 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
818
819 ieee80211_set_wmm_default(sdata);
820}
821
Johannes Berg881d9482009-01-21 15:13:48 +0100822u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200823 enum ieee80211_band band)
824{
825 struct ieee80211_supported_band *sband;
826 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100827 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200828 enum ieee80211_rate_flags mandatory_flag;
829 int i;
830
831 sband = local->hw.wiphy->bands[band];
832 if (!sband) {
833 WARN_ON(1);
834 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
835 }
836
837 if (band == IEEE80211_BAND_2GHZ)
838 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
839 else
840 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
841
842 bitrates = sband->bitrates;
843 mandatory_rates = 0;
844 for (i = 0; i < sband->n_bitrates; i++)
845 if (bitrates[i].flags & mandatory_flag)
846 mandatory_rates |= BIT(i);
847 return mandatory_rates;
848}
Johannes Berg46900292009-02-15 12:44:28 +0100849
850void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
851 u16 transaction, u16 auth_alg,
Johannes Bergfffd0932009-07-08 14:22:54 +0200852 u8 *extra, size_t extra_len, const u8 *bssid,
853 const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100854{
855 struct ieee80211_local *local = sdata->local;
856 struct sk_buff *skb;
857 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +0200858 int err;
Johannes Berg46900292009-02-15 12:44:28 +0100859
860 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200861 sizeof(*mgmt) + 6 + extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100862 if (!skb) {
863 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
Johannes Berg47846c92009-11-25 17:46:19 +0100864 "frame\n", sdata->name);
Johannes Berg46900292009-02-15 12:44:28 +0100865 return;
866 }
867 skb_reserve(skb, local->hw.extra_tx_headroom);
868
869 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
870 memset(mgmt, 0, 24 + 6);
871 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
872 IEEE80211_STYPE_AUTH);
Johannes Berg46900292009-02-15 12:44:28 +0100873 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100874 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100875 memcpy(mgmt->bssid, bssid, ETH_ALEN);
876 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
877 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
878 mgmt->u.auth.status_code = cpu_to_le16(0);
879 if (extra)
880 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100881
Johannes Bergfffd0932009-07-08 14:22:54 +0200882 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
883 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
884 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
885 WARN_ON(err);
886 }
887
Johannes Berg62ae67b2009-11-18 18:42:05 +0100888 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
889 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +0100890}
891
Johannes Bergde95a542009-04-01 11:58:36 +0200892int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec52009-10-27 20:59:55 +0100893 const u8 *ie, size_t ie_len,
894 enum ieee80211_band band)
Johannes Bergde95a542009-04-01 11:58:36 +0200895{
896 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100897 u8 *pos;
898 size_t offset = 0, noffset;
899 int supp_rates_len, i;
Johannes Bergde95a542009-04-01 11:58:36 +0200900
Johannes Berg4d36ec52009-10-27 20:59:55 +0100901 sband = local->hw.wiphy->bands[band];
Johannes Bergde95a542009-04-01 11:58:36 +0200902
903 pos = buffer;
904
Johannes Berg8e664fb2009-12-23 13:15:38 +0100905 supp_rates_len = min_t(int, sband->n_bitrates, 8);
906
Johannes Bergde95a542009-04-01 11:58:36 +0200907 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100908 *pos++ = supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200909
Johannes Berg8e664fb2009-12-23 13:15:38 +0100910 for (i = 0; i < supp_rates_len; i++) {
911 int rate = sband->bitrates[i].bitrate;
912 *pos++ = (u8) (rate / 5);
913 }
Johannes Bergde95a542009-04-01 11:58:36 +0200914
Johannes Berg8e664fb2009-12-23 13:15:38 +0100915 /* insert "request information" if in custom IEs */
916 if (ie && ie_len) {
917 static const u8 before_extrates[] = {
918 WLAN_EID_SSID,
919 WLAN_EID_SUPP_RATES,
920 WLAN_EID_REQUEST,
921 };
922 noffset = ieee80211_ie_split(ie, ie_len,
923 before_extrates,
924 ARRAY_SIZE(before_extrates),
925 offset);
926 memcpy(pos, ie + offset, noffset - offset);
927 pos += noffset - offset;
928 offset = noffset;
929 }
Johannes Bergde95a542009-04-01 11:58:36 +0200930
Johannes Berg8e664fb2009-12-23 13:15:38 +0100931 if (sband->n_bitrates > i) {
932 *pos++ = WLAN_EID_EXT_SUPP_RATES;
933 *pos++ = sband->n_bitrates - i;
934
935 for (; i < sband->n_bitrates; i++) {
936 int rate = sband->bitrates[i].bitrate;
937 *pos++ = (u8) (rate / 5);
938 }
939 }
940
941 /* insert custom IEs that go before HT */
942 if (ie && ie_len) {
943 static const u8 before_ht[] = {
944 WLAN_EID_SSID,
945 WLAN_EID_SUPP_RATES,
946 WLAN_EID_REQUEST,
947 WLAN_EID_EXT_SUPP_RATES,
948 WLAN_EID_DS_PARAMS,
949 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
950 };
951 noffset = ieee80211_ie_split(ie, ie_len,
952 before_ht, ARRAY_SIZE(before_ht),
953 offset);
954 memcpy(pos, ie + offset, noffset - offset);
955 pos += noffset - offset;
956 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +0200957 }
958
Johannes Berg5ef2d412009-03-31 12:12:07 +0200959 if (sband->ht_cap.ht_supported) {
Johannes Bergf38fd122009-12-01 18:29:42 +0100960 u16 cap = sband->ht_cap.cap;
961 __le16 tmp;
962
963 if (ieee80211_disable_40mhz_24ghz &&
964 sband->band == IEEE80211_BAND_2GHZ) {
965 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
966 cap &= ~IEEE80211_HT_CAP_SGI_40;
967 }
Johannes Berg5ef2d412009-03-31 12:12:07 +0200968
969 *pos++ = WLAN_EID_HT_CAPABILITY;
970 *pos++ = sizeof(struct ieee80211_ht_cap);
971 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
Johannes Bergf38fd122009-12-01 18:29:42 +0100972 tmp = cpu_to_le16(cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200973 memcpy(pos, &tmp, sizeof(u16));
974 pos += sizeof(u16);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200975 *pos++ = sband->ht_cap.ampdu_factor |
Johannes Bergf38fd122009-12-01 18:29:42 +0100976 (sband->ht_cap.ampdu_density <<
977 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200978 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
979 pos += sizeof(sband->ht_cap.mcs);
980 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
981 }
982
Johannes Bergde95a542009-04-01 11:58:36 +0200983 /*
984 * If adding more here, adjust code in main.c
985 * that calculates local->scan_ies_len.
986 */
987
Johannes Berg8e664fb2009-12-23 13:15:38 +0100988 /* add any remaining custom IEs */
989 if (ie && ie_len) {
990 noffset = ie_len;
991 memcpy(pos, ie + offset, noffset - offset);
992 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +0200993 }
994
995 return pos - buffer;
996}
997
Johannes Berg46900292009-02-15 12:44:28 +0100998void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
Johannes Bergde95a542009-04-01 11:58:36 +0200999 const u8 *ssid, size_t ssid_len,
1000 const u8 *ie, size_t ie_len)
Johannes Berg46900292009-02-15 12:44:28 +01001001{
1002 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001003 struct sk_buff *skb;
1004 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001005 size_t buf_len;
1006 u8 *buf;
Johannes Berg46900292009-02-15 12:44:28 +01001007
Kalle Valo7c12ce82010-01-05 20:16:44 +02001008 /* FIXME: come up with a proper value */
1009 buf = kmalloc(200 + ie_len, GFP_KERNEL);
1010 if (!buf) {
1011 printk(KERN_DEBUG "%s: failed to allocate temporary IE "
1012 "buffer\n", sdata->name);
Johannes Berg46900292009-02-15 12:44:28 +01001013 return;
1014 }
Johannes Berg46900292009-02-15 12:44:28 +01001015
Kalle Valo7c12ce82010-01-05 20:16:44 +02001016 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
1017 local->hw.conf.channel->band);
1018
1019 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1020 ssid, ssid_len,
1021 buf, buf_len);
1022
Johannes Berg46900292009-02-15 12:44:28 +01001023 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001024 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001025 memcpy(mgmt->da, dst, ETH_ALEN);
1026 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001027 }
Johannes Berg46900292009-02-15 12:44:28 +01001028
Johannes Berg62ae67b2009-11-18 18:42:05 +01001029 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1030 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +01001031}
1032
1033u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1034 struct ieee802_11_elems *elems,
1035 enum ieee80211_band band)
1036{
1037 struct ieee80211_supported_band *sband;
1038 struct ieee80211_rate *bitrates;
1039 size_t num_rates;
1040 u32 supp_rates;
1041 int i, j;
1042 sband = local->hw.wiphy->bands[band];
1043
1044 if (!sband) {
1045 WARN_ON(1);
1046 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1047 }
1048
1049 bitrates = sband->bitrates;
1050 num_rates = sband->n_bitrates;
1051 supp_rates = 0;
1052 for (i = 0; i < elems->supp_rates_len +
1053 elems->ext_supp_rates_len; i++) {
1054 u8 rate = 0;
1055 int own_rate;
1056 if (i < elems->supp_rates_len)
1057 rate = elems->supp_rates[i];
1058 else if (elems->ext_supp_rates)
1059 rate = elems->ext_supp_rates
1060 [i - elems->supp_rates_len];
1061 own_rate = 5 * (rate & 0x7f);
1062 for (j = 0; j < num_rates; j++)
1063 if (bitrates[j].bitrate == own_rate)
1064 supp_rates |= BIT(j);
1065 }
1066 return supp_rates;
1067}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001068
Johannes Berg84f6a012009-08-20 20:02:20 +02001069void ieee80211_stop_device(struct ieee80211_local *local)
1070{
1071 ieee80211_led_radio(local, false);
1072
1073 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001074
1075 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001076 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001077}
1078
Johannes Bergf2753dd2009-04-14 10:09:24 +02001079int ieee80211_reconfig(struct ieee80211_local *local)
1080{
1081 struct ieee80211_hw *hw = &local->hw;
1082 struct ieee80211_sub_if_data *sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001083 struct sta_info *sta;
1084 unsigned long flags;
1085 int res;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001086
Johannes Bergceb99fe2009-11-19 14:29:39 +01001087 if (local->suspended)
1088 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001089
1090 /* restart hardware */
1091 if (local->open_count) {
Luis R. Rodriguez24feda02009-12-24 15:38:22 -05001092 /*
1093 * Upon resume hardware can sometimes be goofy due to
1094 * various platform / driver / bus issues, so restarting
1095 * the device may at times not work immediately. Propagate
1096 * the error.
1097 */
Johannes Berg24487982009-04-23 18:52:52 +02001098 res = drv_start(local);
Luis R. Rodriguez24feda02009-12-24 15:38:22 -05001099 if (res) {
1100 WARN(local->suspended, "Harware became unavailable "
1101 "upon resume. This is could be a software issue"
John W. Linvillee5eb8bd2010-01-04 15:58:03 -05001102 "prior to suspend or a hardware issue\n");
Luis R. Rodriguez24feda02009-12-24 15:38:22 -05001103 return res;
1104 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001105
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001106 ieee80211_led_radio(local, true);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001107 }
1108
1109 /* add interfaces */
1110 list_for_each_entry(sdata, &local->interfaces, list) {
1111 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1112 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001113 ieee80211_sdata_running(sdata))
1114 res = drv_add_interface(local, &sdata->vif);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001115 }
1116
1117 /* add STAs back */
1118 if (local->ops->sta_notify) {
1119 spin_lock_irqsave(&local->sta_lock, flags);
1120 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg5bb644a2009-05-17 11:40:42 +02001121 sdata = sta->sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001122 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1123 sdata = container_of(sdata->bss,
1124 struct ieee80211_sub_if_data,
1125 u.ap);
1126
Johannes Berg12375ef2009-11-25 20:30:31 +01001127 drv_sta_notify(local, sdata, STA_NOTIFY_ADD,
Johannes Berg24487982009-04-23 18:52:52 +02001128 &sta->sta);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001129 }
1130 spin_unlock_irqrestore(&local->sta_lock, flags);
1131 }
1132
1133 /* Clear Suspend state so that ADDBA requests can be processed */
1134
1135 rcu_read_lock();
1136
1137 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1138 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1139 clear_sta_flags(sta, WLAN_STA_SUSPEND);
1140 }
1141 }
1142
1143 rcu_read_unlock();
1144
1145 /* setup RTS threshold */
Johannes Berg24487982009-04-23 18:52:52 +02001146 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001147
1148 /* reconfigure hardware */
1149 ieee80211_hw_config(local, ~0);
1150
Johannes Bergf2753dd2009-04-14 10:09:24 +02001151 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001152
1153 /* Finally also reconfigure all the BSS information */
1154 list_for_each_entry(sdata, &local->interfaces, list) {
1155 u32 changed = ~0;
Johannes Berg9607e6b2009-12-23 13:15:31 +01001156 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001157 continue;
1158 switch (sdata->vif.type) {
1159 case NL80211_IFTYPE_STATION:
1160 /* disable beacon change bits */
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001161 changed &= ~(BSS_CHANGED_BEACON |
1162 BSS_CHANGED_BEACON_ENABLED);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001163 /* fall through */
1164 case NL80211_IFTYPE_ADHOC:
1165 case NL80211_IFTYPE_AP:
1166 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001167 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001168 break;
1169 case NL80211_IFTYPE_WDS:
1170 break;
1171 case NL80211_IFTYPE_AP_VLAN:
1172 case NL80211_IFTYPE_MONITOR:
1173 /* ignore virtual */
1174 break;
1175 case NL80211_IFTYPE_UNSPECIFIED:
1176 case __NL80211_IFTYPE_AFTER_LAST:
1177 WARN_ON(1);
1178 break;
1179 }
1180 }
1181
1182 /* add back keys */
1183 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg9607e6b2009-12-23 13:15:31 +01001184 if (ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001185 ieee80211_enable_keys(sdata);
1186
1187 ieee80211_wake_queues_by_reason(hw,
1188 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1189
Johannes Berg5bb644a2009-05-17 11:40:42 +02001190 /*
1191 * If this is for hw restart things are still running.
1192 * We may want to change that later, however.
1193 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001194 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001195 return 0;
1196
1197#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001198 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001199 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001200 mb();
1201 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001202
1203 list_for_each_entry(sdata, &local->interfaces, list) {
1204 switch(sdata->vif.type) {
1205 case NL80211_IFTYPE_STATION:
1206 ieee80211_sta_restart(sdata);
1207 break;
1208 case NL80211_IFTYPE_ADHOC:
1209 ieee80211_ibss_restart(sdata);
1210 break;
1211 case NL80211_IFTYPE_MESH_POINT:
1212 ieee80211_mesh_restart(sdata);
1213 break;
1214 default:
1215 break;
1216 }
1217 }
1218
1219 add_timer(&local->sta_cleanup);
1220
1221 spin_lock_irqsave(&local->sta_lock, flags);
1222 list_for_each_entry(sta, &local->sta_list, list)
1223 mesh_plink_restart(sta);
1224 spin_unlock_irqrestore(&local->sta_lock, flags);
1225#else
1226 WARN_ON(1);
1227#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001228 return 0;
1229}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001230
Johannes Berg0f782312009-12-01 13:37:02 +01001231static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1232 enum ieee80211_smps_mode *smps_mode)
1233{
1234 if (ifmgd->associated) {
1235 *smps_mode = ifmgd->ap_smps;
1236
1237 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1238 if (ifmgd->powersave)
1239 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1240 else
1241 *smps_mode = IEEE80211_SMPS_OFF;
1242 }
1243
1244 return 1;
1245 }
1246
1247 return 0;
1248}
1249
1250/* must hold iflist_mtx */
1251void ieee80211_recalc_smps(struct ieee80211_local *local,
1252 struct ieee80211_sub_if_data *forsdata)
1253{
1254 struct ieee80211_sub_if_data *sdata;
1255 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1256 int count = 0;
1257
1258 if (forsdata)
1259 WARN_ON(!mutex_is_locked(&forsdata->u.mgd.mtx));
1260
1261 WARN_ON(!mutex_is_locked(&local->iflist_mtx));
1262
1263 /*
1264 * This function could be improved to handle multiple
1265 * interfaces better, but right now it makes any
1266 * non-station interfaces force SM PS to be turned
1267 * off. If there are multiple station interfaces it
1268 * could also use the best possible mode, e.g. if
1269 * one is in static and the other in dynamic then
1270 * dynamic is ok.
1271 */
1272
1273 list_for_each_entry(sdata, &local->interfaces, list) {
1274 if (!netif_running(sdata->dev))
1275 continue;
1276 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1277 goto set;
1278 if (sdata != forsdata) {
1279 /*
1280 * This nested is ok -- we are holding the iflist_mtx
1281 * so can't get here twice or so. But it's required
1282 * since normally we acquire it first and then the
1283 * iflist_mtx.
1284 */
1285 mutex_lock_nested(&sdata->u.mgd.mtx, SINGLE_DEPTH_NESTING);
1286 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1287 mutex_unlock(&sdata->u.mgd.mtx);
1288 } else
1289 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1290
1291 if (count > 1) {
1292 smps_mode = IEEE80211_SMPS_OFF;
1293 break;
1294 }
1295 }
1296
1297 if (smps_mode == local->smps_mode)
1298 return;
1299
1300 set:
1301 local->smps_mode = smps_mode;
1302 /* changed flag is auto-detected for this */
1303 ieee80211_hw_config(local, 0);
1304}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001305
1306static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1307{
1308 int i;
1309
1310 for (i = 0; i < n_ids; i++)
1311 if (ids[i] == id)
1312 return true;
1313 return false;
1314}
1315
1316/**
1317 * ieee80211_ie_split - split an IE buffer according to ordering
1318 *
1319 * @ies: the IE buffer
1320 * @ielen: the length of the IE buffer
1321 * @ids: an array with element IDs that are allowed before
1322 * the split
1323 * @n_ids: the size of the element ID array
1324 * @offset: offset where to start splitting in the buffer
1325 *
1326 * This function splits an IE buffer by updating the @offset
1327 * variable to point to the location where the buffer should be
1328 * split.
1329 *
1330 * It assumes that the given IE buffer is well-formed, this
1331 * has to be guaranteed by the caller!
1332 *
1333 * It also assumes that the IEs in the buffer are ordered
1334 * correctly, if not the result of using this function will not
1335 * be ordered correctly either, i.e. it does no reordering.
1336 *
1337 * The function returns the offset where the next part of the
1338 * buffer starts, which may be @ielen if the entire (remainder)
1339 * of the buffer should be used.
1340 */
1341size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1342 const u8 *ids, int n_ids, size_t offset)
1343{
1344 size_t pos = offset;
1345
1346 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1347 pos += 2 + ies[pos + 1];
1348
1349 return pos;
1350}
1351
1352size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1353{
1354 size_t pos = offset;
1355
1356 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1357 pos += 2 + ies[pos + 1];
1358
1359 return pos;
1360}