blob: 66ce96a69f318bab53cf88a8946c49b494f7b9ab [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>
21#include <linux/wireless.h>
22#include <linux/bitmap.h>
Johannes Bergd91f36d2009-04-16 13:17:26 +020023#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020025#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010026#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020027
28#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020029#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040030#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010031#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020032#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020033#include "led.h"
Johannes 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);
271
Johannes Berge4e72fb2009-03-23 17:28:42 +0100272 if (WARN_ON(queue >= hw->queues))
273 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200274
Johannes Berg96f5e662009-02-12 00:51:53 +0100275 __clear_bit(reason, &local->queue_stop_reasons[queue]);
276
Johannes Berg2a577d92009-03-23 17:28:37 +0100277 if (!skb_queue_empty(&local->pending[queue]) &&
278 local->queue_stop_reasons[queue] ==
279 BIT(IEEE80211_QUEUE_STOP_REASON_PENDING))
280 tasklet_schedule(&local->tx_pending_tasklet);
281
Johannes Berg96f5e662009-02-12 00:51:53 +0100282 if (local->queue_stop_reasons[queue] != 0)
283 /* someone still has this queue stopped */
284 return;
285
Johannes Berg2a577d92009-03-23 17:28:37 +0100286 netif_wake_subqueue(local->mdev, queue);
Johannes Bergc2d15602007-07-27 15:43:23 +0200287}
Kalle Valoce7c9112008-12-18 23:35:20 +0200288
Johannes Berg96f5e662009-02-12 00:51:53 +0100289void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
290 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200291{
292 struct ieee80211_local *local = hw_to_local(hw);
293 unsigned long flags;
294
295 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
296 __ieee80211_wake_queue(hw, queue, reason);
297 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
298}
299
300void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
301{
302 ieee80211_wake_queue_by_reason(hw, queue,
303 IEEE80211_QUEUE_STOP_REASON_DRIVER);
304}
Johannes Bergc2d15602007-07-27 15:43:23 +0200305EXPORT_SYMBOL(ieee80211_wake_queue);
306
Kalle Valoce7c9112008-12-18 23:35:20 +0200307static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
308 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200309{
310 struct ieee80211_local *local = hw_to_local(hw);
311
Johannes Berge4e72fb2009-03-23 17:28:42 +0100312 if (WARN_ON(queue >= hw->queues))
313 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100314
Johannes Berg2a577d92009-03-23 17:28:37 +0100315 /*
316 * Only stop if it was previously running, this is necessary
317 * for correct pending packets handling because there we may
318 * start (but not wake) the queue and rely on that.
319 */
320 if (!local->queue_stop_reasons[queue])
321 netif_stop_subqueue(local->mdev, queue);
Kalle Valoce7c9112008-12-18 23:35:20 +0200322
Johannes Berg2a577d92009-03-23 17:28:37 +0100323 __set_bit(reason, &local->queue_stop_reasons[queue]);
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);
350
351 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
352 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
353 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_PENDING);
354 skb_queue_tail(&local->pending[queue], skb);
355 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
356 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
357}
358
359int ieee80211_add_pending_skbs(struct ieee80211_local *local,
360 struct sk_buff_head *skbs)
361{
362 struct ieee80211_hw *hw = &local->hw;
363 struct sk_buff *skb;
364 unsigned long flags;
365 int queue, ret = 0, i;
366
367 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
368 for (i = 0; i < hw->queues; i++)
369 __ieee80211_stop_queue(hw, i,
370 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
371
372 while ((skb = skb_dequeue(skbs))) {
373 ret++;
374 queue = skb_get_queue_mapping(skb);
375 skb_queue_tail(&local->pending[queue], skb);
376 }
377
378 for (i = 0; i < hw->queues; i++) {
379 if (ret)
380 __ieee80211_stop_queue(hw, i,
381 IEEE80211_QUEUE_STOP_REASON_PENDING);
382 __ieee80211_wake_queue(hw, i,
383 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
384 }
385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
386
387 return ret;
388}
389
Kalle Valoce7c9112008-12-18 23:35:20 +0200390void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
391 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200392{
Kalle Valoce7c9112008-12-18 23:35:20 +0200393 struct ieee80211_local *local = hw_to_local(hw);
394 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200395 int i;
396
Kalle Valoce7c9112008-12-18 23:35:20 +0200397 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
398
Johannes Berg96f5e662009-02-12 00:51:53 +0100399 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200400 __ieee80211_stop_queue(hw, i, reason);
401
402 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
403}
404
405void ieee80211_stop_queues(struct ieee80211_hw *hw)
406{
407 ieee80211_stop_queues_by_reason(hw,
408 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200409}
410EXPORT_SYMBOL(ieee80211_stop_queues);
411
Tomas Winkler92ab8532008-07-24 21:02:04 +0300412int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
413{
414 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg96f5e662009-02-12 00:51:53 +0100415
Johannes Berge4e72fb2009-03-23 17:28:42 +0100416 if (WARN_ON(queue >= hw->queues))
417 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100418
Tomas Winkler92ab8532008-07-24 21:02:04 +0300419 return __netif_subqueue_stopped(local->mdev, queue);
420}
421EXPORT_SYMBOL(ieee80211_queue_stopped);
422
Kalle Valoce7c9112008-12-18 23:35:20 +0200423void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
424 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200425{
Kalle Valoce7c9112008-12-18 23:35:20 +0200426 struct ieee80211_local *local = hw_to_local(hw);
427 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200428 int i;
429
Kalle Valoce7c9112008-12-18 23:35:20 +0200430 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
431
Johannes Berge4e72fb2009-03-23 17:28:42 +0100432 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200433 __ieee80211_wake_queue(hw, i, reason);
434
435 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
436}
437
438void ieee80211_wake_queues(struct ieee80211_hw *hw)
439{
440 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200441}
442EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100443
Johannes Berg32bfd352007-12-19 01:31:26 +0100444void ieee80211_iterate_active_interfaces(
445 struct ieee80211_hw *hw,
446 void (*iterator)(void *data, u8 *mac,
447 struct ieee80211_vif *vif),
448 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100449{
450 struct ieee80211_local *local = hw_to_local(hw);
451 struct ieee80211_sub_if_data *sdata;
452
Johannes Bergc771c9d2009-01-23 22:54:03 +0100453 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200454
455 list_for_each_entry(sdata, &local->interfaces, list) {
456 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200457 case __NL80211_IFTYPE_AFTER_LAST:
458 case NL80211_IFTYPE_UNSPECIFIED:
459 case NL80211_IFTYPE_MONITOR:
460 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200461 continue;
Johannes Berg05c914f2008-09-11 00:01:58 +0200462 case NL80211_IFTYPE_AP:
463 case NL80211_IFTYPE_STATION:
464 case NL80211_IFTYPE_ADHOC:
465 case NL80211_IFTYPE_WDS:
466 case NL80211_IFTYPE_MESH_POINT:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200467 break;
468 }
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200469 if (netif_running(sdata->dev))
470 iterator(data, sdata->dev->dev_addr,
471 &sdata->vif);
472 }
473
Johannes Bergc771c9d2009-01-23 22:54:03 +0100474 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200475}
476EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
477
478void ieee80211_iterate_active_interfaces_atomic(
479 struct ieee80211_hw *hw,
480 void (*iterator)(void *data, u8 *mac,
481 struct ieee80211_vif *vif),
482 void *data)
483{
484 struct ieee80211_local *local = hw_to_local(hw);
485 struct ieee80211_sub_if_data *sdata;
486
Johannes Berge38bad42007-11-28 10:55:32 +0100487 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100488
Johannes Berge38bad42007-11-28 10:55:32 +0100489 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100490 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200491 case __NL80211_IFTYPE_AFTER_LAST:
492 case NL80211_IFTYPE_UNSPECIFIED:
493 case NL80211_IFTYPE_MONITOR:
494 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100495 continue;
Johannes Berg05c914f2008-09-11 00:01:58 +0200496 case NL80211_IFTYPE_AP:
497 case NL80211_IFTYPE_STATION:
498 case NL80211_IFTYPE_ADHOC:
499 case NL80211_IFTYPE_WDS:
500 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergdabeb342007-11-09 01:57:29 +0100501 break;
502 }
Johannes Bergdabeb342007-11-09 01:57:29 +0100503 if (netif_running(sdata->dev))
504 iterator(data, sdata->dev->dev_addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100505 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100506 }
Johannes Berge38bad42007-11-28 10:55:32 +0100507
508 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100509}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200510EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200511
512void ieee802_11_parse_elems(u8 *start, size_t len,
513 struct ieee802_11_elems *elems)
514{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200515 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
516}
517
518u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
519 struct ieee802_11_elems *elems,
520 u64 filter, u32 crc)
521{
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200522 size_t left = len;
523 u8 *pos = start;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200524 bool calc_crc = filter != 0;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200525
526 memset(elems, 0, sizeof(*elems));
527 elems->ie_start = start;
528 elems->total_len = len;
529
530 while (left >= 2) {
531 u8 id, elen;
532
533 id = *pos++;
534 elen = *pos++;
535 left -= 2;
536
537 if (elen > left)
Johannes Bergd91f36d2009-04-16 13:17:26 +0200538 break;
539
540 if (calc_crc && id < 64 && (filter & BIT(id)))
541 crc = crc32_be(crc, pos - 2, elen + 2);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200542
543 switch (id) {
544 case WLAN_EID_SSID:
545 elems->ssid = pos;
546 elems->ssid_len = elen;
547 break;
548 case WLAN_EID_SUPP_RATES:
549 elems->supp_rates = pos;
550 elems->supp_rates_len = elen;
551 break;
552 case WLAN_EID_FH_PARAMS:
553 elems->fh_params = pos;
554 elems->fh_params_len = elen;
555 break;
556 case WLAN_EID_DS_PARAMS:
557 elems->ds_params = pos;
558 elems->ds_params_len = elen;
559 break;
560 case WLAN_EID_CF_PARAMS:
561 elems->cf_params = pos;
562 elems->cf_params_len = elen;
563 break;
564 case WLAN_EID_TIM:
Johannes Berge7ec86f2009-04-18 17:33:24 +0200565 if (elen >= sizeof(struct ieee80211_tim_ie)) {
566 elems->tim = (void *)pos;
567 elems->tim_len = elen;
568 }
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200569 break;
570 case WLAN_EID_IBSS_PARAMS:
571 elems->ibss_params = pos;
572 elems->ibss_params_len = elen;
573 break;
574 case WLAN_EID_CHALLENGE:
575 elems->challenge = pos;
576 elems->challenge_len = elen;
577 break;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200578 case WLAN_EID_VENDOR_SPECIFIC:
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200579 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
580 pos[2] == 0xf2) {
581 /* Microsoft OUI (00:50:F2) */
Johannes Bergd91f36d2009-04-16 13:17:26 +0200582
583 if (calc_crc)
584 crc = crc32_be(crc, pos - 2, elen + 2);
585
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200586 if (pos[3] == 1) {
587 /* OUI Type 1 - WPA IE */
588 elems->wpa = pos;
589 elems->wpa_len = elen;
590 } else if (elen >= 5 && pos[3] == 2) {
Johannes Bergd91f36d2009-04-16 13:17:26 +0200591 /* OUI Type 2 - WMM IE */
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200592 if (pos[4] == 0) {
593 elems->wmm_info = pos;
594 elems->wmm_info_len = elen;
595 } else if (pos[4] == 1) {
596 elems->wmm_param = pos;
597 elems->wmm_param_len = elen;
598 }
599 }
600 }
601 break;
602 case WLAN_EID_RSN:
603 elems->rsn = pos;
604 elems->rsn_len = elen;
605 break;
606 case WLAN_EID_ERP_INFO:
607 elems->erp_info = pos;
608 elems->erp_info_len = elen;
609 break;
610 case WLAN_EID_EXT_SUPP_RATES:
611 elems->ext_supp_rates = pos;
612 elems->ext_supp_rates_len = elen;
613 break;
614 case WLAN_EID_HT_CAPABILITY:
Johannes Berg09914812008-10-07 19:31:17 +0200615 if (elen >= sizeof(struct ieee80211_ht_cap))
616 elems->ht_cap_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200617 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200618 case WLAN_EID_HT_INFORMATION:
619 if (elen >= sizeof(struct ieee80211_ht_info))
Johannes Berg09914812008-10-07 19:31:17 +0200620 elems->ht_info_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200621 break;
622 case WLAN_EID_MESH_ID:
623 elems->mesh_id = pos;
624 elems->mesh_id_len = elen;
625 break;
626 case WLAN_EID_MESH_CONFIG:
627 elems->mesh_config = pos;
628 elems->mesh_config_len = elen;
629 break;
630 case WLAN_EID_PEER_LINK:
631 elems->peer_link = pos;
632 elems->peer_link_len = elen;
633 break;
634 case WLAN_EID_PREQ:
635 elems->preq = pos;
636 elems->preq_len = elen;
637 break;
638 case WLAN_EID_PREP:
639 elems->prep = pos;
640 elems->prep_len = elen;
641 break;
642 case WLAN_EID_PERR:
643 elems->perr = pos;
644 elems->perr_len = elen;
645 break;
646 case WLAN_EID_CHANNEL_SWITCH:
647 elems->ch_switch_elem = pos;
648 elems->ch_switch_elem_len = elen;
649 break;
650 case WLAN_EID_QUIET:
651 if (!elems->quiet_elem) {
652 elems->quiet_elem = pos;
653 elems->quiet_elem_len = elen;
654 }
655 elems->num_of_quiet_elem++;
656 break;
657 case WLAN_EID_COUNTRY:
658 elems->country_elem = pos;
659 elems->country_elem_len = elen;
660 break;
661 case WLAN_EID_PWR_CONSTRAINT:
662 elems->pwr_constr_elem = pos;
663 elems->pwr_constr_elem_len = elen;
664 break;
Jouni Malinenf797eb72009-01-19 18:48:46 +0200665 case WLAN_EID_TIMEOUT_INTERVAL:
666 elems->timeout_int = pos;
667 elems->timeout_int_len = elen;
Jouni Malinen63a5ab82009-01-08 13:32:09 +0200668 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200669 default:
670 break;
671 }
672
673 left -= elen;
674 pos += elen;
675 }
Johannes Bergd91f36d2009-04-16 13:17:26 +0200676
677 return crc;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200678}
Johannes Berg5825fe102008-09-09 12:56:01 +0200679
680void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
681{
682 struct ieee80211_local *local = sdata->local;
683 struct ieee80211_tx_queue_params qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200684 int queue;
685 bool use_11b;
686 int aCWmin, aCWmax;
Johannes Berg5825fe102008-09-09 12:56:01 +0200687
688 if (!local->ops->conf_tx)
689 return;
690
691 memset(&qparam, 0, sizeof(qparam));
692
Johannes Bergaa837e12009-05-07 16:16:24 +0200693 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
694 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe102008-09-09 12:56:01 +0200695
Johannes Bergaa837e12009-05-07 16:16:24 +0200696 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
697 /* Set defaults according to 802.11-2007 Table 7-37 */
698 aCWmax = 1023;
699 if (use_11b)
700 aCWmin = 31;
701 else
702 aCWmin = 15;
Johannes Berg5825fe102008-09-09 12:56:01 +0200703
Johannes Bergaa837e12009-05-07 16:16:24 +0200704 switch (queue) {
705 case 3: /* AC_BK */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200706 qparam.cw_max = aCWmax;
707 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200708 qparam.txop = 0;
709 qparam.aifs = 7;
710 break;
711 default: /* never happens but let's not leave undefined */
712 case 2: /* AC_BE */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200713 qparam.cw_max = aCWmax;
714 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200715 qparam.txop = 0;
716 qparam.aifs = 3;
717 break;
718 case 1: /* AC_VI */
719 qparam.cw_max = aCWmin;
720 qparam.cw_min = (aCWmin + 1) / 2 - 1;
721 if (use_11b)
722 qparam.txop = 6016/32;
723 else
724 qparam.txop = 3008/32;
725 qparam.aifs = 2;
726 break;
727 case 0: /* AC_VO */
728 qparam.cw_max = (aCWmin + 1) / 2 - 1;
729 qparam.cw_min = (aCWmin + 1) / 4 - 1;
730 if (use_11b)
731 qparam.txop = 3264/32;
732 else
733 qparam.txop = 1504/32;
734 qparam.aifs = 2;
735 break;
736 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200737
Johannes Bergaa837e12009-05-07 16:16:24 +0200738 drv_conf_tx(local, queue, &qparam);
739 }
Johannes Berg5825fe102008-09-09 12:56:01 +0200740}
Johannes Berge50db652008-09-09 15:07:09 +0200741
Johannes Berg46900292009-02-15 12:44:28 +0100742void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
743 const size_t supp_rates_len,
744 const u8 *supp_rates)
745{
746 struct ieee80211_local *local = sdata->local;
747 int i, have_higher_than_11mbit = 0;
748
749 /* cf. IEEE 802.11 9.2.12 */
750 for (i = 0; i < supp_rates_len; i++)
751 if ((supp_rates[i] & 0x7f) * 5 > 110)
752 have_higher_than_11mbit = 1;
753
754 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
755 have_higher_than_11mbit)
756 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
757 else
758 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
759
760 ieee80211_set_wmm_default(sdata);
761}
762
Johannes Berge50db652008-09-09 15:07:09 +0200763void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
764 int encrypt)
765{
766 skb->dev = sdata->local->mdev;
767 skb_set_mac_header(skb, 0);
768 skb_set_network_header(skb, 0);
769 skb_set_transport_header(skb, 0);
770
771 skb->iif = sdata->dev->ifindex;
772 skb->do_not_encrypt = !encrypt;
773
774 dev_queue_xmit(skb);
775}
Johannes Berge16751c2008-09-11 00:01:53 +0200776
777int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
778{
779 int ret = -EINVAL;
780 struct ieee80211_channel *chan;
781 struct ieee80211_local *local = sdata->local;
782
783 chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
784
785 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200786 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
Johannes Bergd73782f2008-10-07 12:04:34 +0200787 chan->flags & IEEE80211_CHAN_NO_IBSS)
Johannes Berge16751c2008-09-11 00:01:53 +0200788 return ret;
Johannes Berge16751c2008-09-11 00:01:53 +0200789 local->oper_channel = chan;
Sujith094d05d2008-12-12 11:57:43 +0530790 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Berge16751c2008-09-11 00:01:53 +0200791
Johannes Bergc2b13452008-09-11 00:01:55 +0200792 if (local->sw_scanning || local->hw_scanning)
Johannes Berge16751c2008-09-11 00:01:53 +0200793 ret = 0;
794 else
Johannes Berge8975582008-10-09 12:18:51 +0200795 ret = ieee80211_hw_config(
796 local, IEEE80211_CONF_CHANGE_CHANNEL);
Johannes Berge16751c2008-09-11 00:01:53 +0200797 }
798
799 return ret;
800}
Johannes Berg96dd22a2008-09-11 00:01:57 +0200801
Johannes Berg881d9482009-01-21 15:13:48 +0100802u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200803 enum ieee80211_band band)
804{
805 struct ieee80211_supported_band *sband;
806 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100807 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200808 enum ieee80211_rate_flags mandatory_flag;
809 int i;
810
811 sband = local->hw.wiphy->bands[band];
812 if (!sband) {
813 WARN_ON(1);
814 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
815 }
816
817 if (band == IEEE80211_BAND_2GHZ)
818 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
819 else
820 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
821
822 bitrates = sband->bitrates;
823 mandatory_rates = 0;
824 for (i = 0; i < sband->n_bitrates; i++)
825 if (bitrates[i].flags & mandatory_flag)
826 mandatory_rates |= BIT(i);
827 return mandatory_rates;
828}
Johannes Berg46900292009-02-15 12:44:28 +0100829
830void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
831 u16 transaction, u16 auth_alg,
832 u8 *extra, size_t extra_len,
833 const u8 *bssid, int encrypt)
834{
835 struct ieee80211_local *local = sdata->local;
836 struct sk_buff *skb;
837 struct ieee80211_mgmt *mgmt;
Johannes Berg46900292009-02-15 12:44:28 +0100838
839 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200840 sizeof(*mgmt) + 6 + extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100841 if (!skb) {
842 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
843 "frame\n", sdata->dev->name);
844 return;
845 }
846 skb_reserve(skb, local->hw.extra_tx_headroom);
847
848 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
849 memset(mgmt, 0, 24 + 6);
850 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
851 IEEE80211_STYPE_AUTH);
852 if (encrypt)
853 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
854 memcpy(mgmt->da, bssid, ETH_ALEN);
855 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
856 memcpy(mgmt->bssid, bssid, ETH_ALEN);
857 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
858 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
859 mgmt->u.auth.status_code = cpu_to_le16(0);
860 if (extra)
861 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100862
863 ieee80211_tx_skb(sdata, skb, encrypt);
864}
865
Johannes Bergde95a542009-04-01 11:58:36 +0200866int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
867 const u8 *ie, size_t ie_len)
868{
869 struct ieee80211_supported_band *sband;
870 u8 *pos, *supp_rates_len, *esupp_rates_len = NULL;
871 int i;
872
873 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
874
875 pos = buffer;
876
877 *pos++ = WLAN_EID_SUPP_RATES;
878 supp_rates_len = pos;
879 *pos++ = 0;
880
881 for (i = 0; i < sband->n_bitrates; i++) {
882 struct ieee80211_rate *rate = &sband->bitrates[i];
883
884 if (esupp_rates_len) {
885 *esupp_rates_len += 1;
886 } else if (*supp_rates_len == 8) {
887 *pos++ = WLAN_EID_EXT_SUPP_RATES;
888 esupp_rates_len = pos;
889 *pos++ = 1;
890 } else
891 *supp_rates_len += 1;
892
893 *pos++ = rate->bitrate / 5;
894 }
895
Johannes Berg5ef2d412009-03-31 12:12:07 +0200896 if (sband->ht_cap.ht_supported) {
897 __le16 tmp = cpu_to_le16(sband->ht_cap.cap);
898
899 *pos++ = WLAN_EID_HT_CAPABILITY;
900 *pos++ = sizeof(struct ieee80211_ht_cap);
901 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
902 memcpy(pos, &tmp, sizeof(u16));
903 pos += sizeof(u16);
904 /* TODO: needs a define here for << 2 */
905 *pos++ = sband->ht_cap.ampdu_factor |
906 (sband->ht_cap.ampdu_density << 2);
907 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
908 pos += sizeof(sband->ht_cap.mcs);
909 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
910 }
911
Johannes Bergde95a542009-04-01 11:58:36 +0200912 /*
913 * If adding more here, adjust code in main.c
914 * that calculates local->scan_ies_len.
915 */
916
917 if (ie) {
918 memcpy(pos, ie, ie_len);
919 pos += ie_len;
920 }
921
922 return pos - buffer;
923}
924
Johannes Berg46900292009-02-15 12:44:28 +0100925void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
Johannes Bergde95a542009-04-01 11:58:36 +0200926 const u8 *ssid, size_t ssid_len,
927 const u8 *ie, size_t ie_len)
Johannes Berg46900292009-02-15 12:44:28 +0100928{
929 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +0100930 struct sk_buff *skb;
931 struct ieee80211_mgmt *mgmt;
Johannes Bergde95a542009-04-01 11:58:36 +0200932 u8 *pos;
Johannes Berg46900292009-02-15 12:44:28 +0100933
934 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*mgmt) + 200 +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200935 ie_len);
Johannes Berg46900292009-02-15 12:44:28 +0100936 if (!skb) {
937 printk(KERN_DEBUG "%s: failed to allocate buffer for probe "
938 "request\n", sdata->dev->name);
939 return;
940 }
941 skb_reserve(skb, local->hw.extra_tx_headroom);
942
943 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
944 memset(mgmt, 0, 24);
945 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
946 IEEE80211_STYPE_PROBE_REQ);
947 memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN);
948 if (dst) {
949 memcpy(mgmt->da, dst, ETH_ALEN);
950 memcpy(mgmt->bssid, dst, ETH_ALEN);
951 } else {
952 memset(mgmt->da, 0xff, ETH_ALEN);
953 memset(mgmt->bssid, 0xff, ETH_ALEN);
954 }
955 pos = skb_put(skb, 2 + ssid_len);
956 *pos++ = WLAN_EID_SSID;
957 *pos++ = ssid_len;
958 memcpy(pos, ssid, ssid_len);
Johannes Bergde95a542009-04-01 11:58:36 +0200959 pos += ssid_len;
Johannes Berg46900292009-02-15 12:44:28 +0100960
Johannes Bergde95a542009-04-01 11:58:36 +0200961 skb_put(skb, ieee80211_build_preq_ies(local, pos, ie, ie_len));
Johannes Berg46900292009-02-15 12:44:28 +0100962
963 ieee80211_tx_skb(sdata, skb, 0);
964}
965
966u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
967 struct ieee802_11_elems *elems,
968 enum ieee80211_band band)
969{
970 struct ieee80211_supported_band *sband;
971 struct ieee80211_rate *bitrates;
972 size_t num_rates;
973 u32 supp_rates;
974 int i, j;
975 sband = local->hw.wiphy->bands[band];
976
977 if (!sband) {
978 WARN_ON(1);
979 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
980 }
981
982 bitrates = sband->bitrates;
983 num_rates = sband->n_bitrates;
984 supp_rates = 0;
985 for (i = 0; i < elems->supp_rates_len +
986 elems->ext_supp_rates_len; i++) {
987 u8 rate = 0;
988 int own_rate;
989 if (i < elems->supp_rates_len)
990 rate = elems->supp_rates[i];
991 else if (elems->ext_supp_rates)
992 rate = elems->ext_supp_rates
993 [i - elems->supp_rates_len];
994 own_rate = 5 * (rate & 0x7f);
995 for (j = 0; j < num_rates; j++)
996 if (bitrates[j].bitrate == own_rate)
997 supp_rates |= BIT(j);
998 }
999 return supp_rates;
1000}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001001
1002int ieee80211_reconfig(struct ieee80211_local *local)
1003{
1004 struct ieee80211_hw *hw = &local->hw;
1005 struct ieee80211_sub_if_data *sdata;
1006 struct ieee80211_if_init_conf conf;
1007 struct sta_info *sta;
1008 unsigned long flags;
1009 int res;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001010 bool from_suspend = local->suspended;
1011
1012 /*
1013 * We're going to start the hardware, at that point
1014 * we are no longer suspended and can RX frames.
1015 */
1016 local->suspended = false;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001017
1018 /* restart hardware */
1019 if (local->open_count) {
Johannes Berg24487982009-04-23 18:52:52 +02001020 res = drv_start(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001021
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001022 ieee80211_led_radio(local, true);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001023 }
1024
1025 /* add interfaces */
1026 list_for_each_entry(sdata, &local->interfaces, list) {
1027 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1028 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1029 netif_running(sdata->dev)) {
1030 conf.vif = &sdata->vif;
1031 conf.type = sdata->vif.type;
1032 conf.mac_addr = sdata->dev->dev_addr;
Johannes Berg24487982009-04-23 18:52:52 +02001033 res = drv_add_interface(local, &conf);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001034 }
1035 }
1036
1037 /* add STAs back */
1038 if (local->ops->sta_notify) {
1039 spin_lock_irqsave(&local->sta_lock, flags);
1040 list_for_each_entry(sta, &local->sta_list, list) {
Johannes Berg5bb644a2009-05-17 11:40:42 +02001041 sdata = sta->sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001042 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1043 sdata = container_of(sdata->bss,
1044 struct ieee80211_sub_if_data,
1045 u.ap);
1046
Johannes Berg24487982009-04-23 18:52:52 +02001047 drv_sta_notify(local, &sdata->vif, STA_NOTIFY_ADD,
1048 &sta->sta);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001049 }
1050 spin_unlock_irqrestore(&local->sta_lock, flags);
1051 }
1052
1053 /* Clear Suspend state so that ADDBA requests can be processed */
1054
1055 rcu_read_lock();
1056
1057 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1058 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1059 clear_sta_flags(sta, WLAN_STA_SUSPEND);
1060 }
1061 }
1062
1063 rcu_read_unlock();
1064
1065 /* setup RTS threshold */
Johannes Berg24487982009-04-23 18:52:52 +02001066 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001067
1068 /* reconfigure hardware */
1069 ieee80211_hw_config(local, ~0);
1070
1071 netif_addr_lock_bh(local->mdev);
1072 ieee80211_configure_filter(local);
1073 netif_addr_unlock_bh(local->mdev);
1074
1075 /* Finally also reconfigure all the BSS information */
1076 list_for_each_entry(sdata, &local->interfaces, list) {
1077 u32 changed = ~0;
1078 if (!netif_running(sdata->dev))
1079 continue;
1080 switch (sdata->vif.type) {
1081 case NL80211_IFTYPE_STATION:
1082 /* disable beacon change bits */
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001083 changed &= ~(BSS_CHANGED_BEACON |
1084 BSS_CHANGED_BEACON_ENABLED);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001085 /* fall through */
1086 case NL80211_IFTYPE_ADHOC:
1087 case NL80211_IFTYPE_AP:
1088 case NL80211_IFTYPE_MESH_POINT:
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001089 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001090 break;
1091 case NL80211_IFTYPE_WDS:
1092 break;
1093 case NL80211_IFTYPE_AP_VLAN:
1094 case NL80211_IFTYPE_MONITOR:
1095 /* ignore virtual */
1096 break;
1097 case NL80211_IFTYPE_UNSPECIFIED:
1098 case __NL80211_IFTYPE_AFTER_LAST:
1099 WARN_ON(1);
1100 break;
1101 }
1102 }
1103
1104 /* add back keys */
1105 list_for_each_entry(sdata, &local->interfaces, list)
1106 if (netif_running(sdata->dev))
1107 ieee80211_enable_keys(sdata);
1108
1109 ieee80211_wake_queues_by_reason(hw,
1110 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1111
Johannes Berg5bb644a2009-05-17 11:40:42 +02001112 /*
1113 * If this is for hw restart things are still running.
1114 * We may want to change that later, however.
1115 */
1116 if (!from_suspend)
1117 return 0;
1118
1119#ifdef CONFIG_PM
1120 local->suspended = false;
1121
1122 list_for_each_entry(sdata, &local->interfaces, list) {
1123 switch(sdata->vif.type) {
1124 case NL80211_IFTYPE_STATION:
1125 ieee80211_sta_restart(sdata);
1126 break;
1127 case NL80211_IFTYPE_ADHOC:
1128 ieee80211_ibss_restart(sdata);
1129 break;
1130 case NL80211_IFTYPE_MESH_POINT:
1131 ieee80211_mesh_restart(sdata);
1132 break;
1133 default:
1134 break;
1135 }
1136 }
1137
1138 add_timer(&local->sta_cleanup);
1139
1140 spin_lock_irqsave(&local->sta_lock, flags);
1141 list_for_each_entry(sta, &local->sta_list, list)
1142 mesh_plink_restart(sta);
1143 spin_unlock_irqrestore(&local->sta_lock, flags);
1144#else
1145 WARN_ON(1);
1146#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001147 return 0;
1148}