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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>
21#include <linux/wireless.h>
22#include <linux/bitmap.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 Berg2c8dccc2008-04-08 15:14:40 -040028#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010029#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020030#include "wme.h"
31
32/* privid for wiphys to determine whether they belong to us or not */
33void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
34
35/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
36/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
Senthil Balasubramanianc97c23e2008-05-28 23:15:32 +053037const unsigned char rfc1042_header[] __aligned(2) =
Johannes Bergc2d15602007-07-27 15:43:23 +020038 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
39
40/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
Senthil Balasubramanianc97c23e2008-05-28 23:15:32 +053041const unsigned char bridge_tunnel_header[] __aligned(2) =
Johannes Bergc2d15602007-07-27 15:43:23 +020042 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
43
Johannes Bergc2d15602007-07-27 15:43:23 +020044
Ron Rindjunsky71364712007-12-25 17:00:36 +020045u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020046 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020047{
Harvey Harrisona494bb12008-06-11 14:21:58 -070048 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020049
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020050 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
51 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020052 return NULL;
53
Harvey Harrisona494bb12008-06-11 14:21:58 -070054 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020055 if (len < 24) /* drop incorrect hdr len (data) */
56 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070057
58 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020059 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070060 if (ieee80211_has_tods(fc))
61 return hdr->addr1;
62 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020063 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070064
65 return hdr->addr3;
66 }
67
68 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020069 if (len < 24) /* drop incorrect hdr len (mgmt) */
70 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020071 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070072 }
73
74 if (ieee80211_is_ctl(fc)) {
75 if(ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020076 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070077
78 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020079 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020080 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020081 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020082 case NL80211_IFTYPE_AP:
83 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020084 return hdr->addr1;
85 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070086 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020087 }
88 }
Johannes Bergc2d15602007-07-27 15:43:23 +020089 }
90
91 return NULL;
92}
93
Harvey Harrison6693be72008-06-11 14:21:57 -070094unsigned int ieee80211_hdrlen(__le16 fc)
95{
96 unsigned int hdrlen = 24;
97
98 if (ieee80211_is_data(fc)) {
99 if (ieee80211_has_a4(fc))
100 hdrlen = 30;
101 if (ieee80211_is_data_qos(fc))
102 hdrlen += IEEE80211_QOS_CTL_LEN;
103 goto out;
104 }
105
106 if (ieee80211_is_ctl(fc)) {
107 /*
108 * ACK and CTS are 10 bytes, all others 16. To see how
109 * to get this condition consider
110 * subtype mask: 0b0000000011110000 (0x00F0)
111 * ACK subtype: 0b0000000011010000 (0x00D0)
112 * CTS subtype: 0b0000000011000000 (0x00C0)
113 * bits that matter: ^^^ (0x00E0)
114 * value of those: 0b0000000011000000 (0x00C0)
115 */
116 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
117 hdrlen = 10;
118 else
119 hdrlen = 16;
120 }
121out:
122 return hdrlen;
123}
124EXPORT_SYMBOL(ieee80211_hdrlen);
125
Harvey Harrisonc9c69502008-06-11 14:21:57 -0700126unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
Johannes Bergc2d15602007-07-27 15:43:23 +0200127{
Harvey Harrisonc9c69502008-06-11 14:21:57 -0700128 const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data;
129 unsigned int hdrlen;
Johannes Bergc2d15602007-07-27 15:43:23 +0200130
131 if (unlikely(skb->len < 10))
132 return 0;
Harvey Harrisonc9c69502008-06-11 14:21:57 -0700133 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Bergc2d15602007-07-27 15:43:23 +0200134 if (unlikely(hdrlen > skb->len))
135 return 0;
136 return hdrlen;
137}
138EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
139
Luis Carlos Coboee385852008-02-23 15:17:11 +0100140int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
141{
142 int ae = meshhdr->flags & IEEE80211S_FLAGS_AE;
143 /* 7.1.3.5a.2 */
144 switch (ae) {
145 case 0:
Luis Carlos Coboef269252008-05-05 12:02:35 -0700146 return 6;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100147 case 1:
Luis Carlos Coboef269252008-05-05 12:02:35 -0700148 return 12;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100149 case 2:
Luis Carlos Coboef269252008-05-05 12:02:35 -0700150 return 18;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100151 case 3:
Luis Carlos Coboef269252008-05-05 12:02:35 -0700152 return 24;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100153 default:
Luis Carlos Coboef269252008-05-05 12:02:35 -0700154 return 6;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100155 }
156}
Luis Carlos Coboee385852008-02-23 15:17:11 +0100157
Johannes Berg5cf121c2008-02-25 16:27:43 +0100158void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +0200159{
160 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
161
162 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
Johannes Berg5cf121c2008-02-25 16:27:43 +0100163 if (tx->extra_frag) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200164 struct ieee80211_hdr *fhdr;
165 int i;
Johannes Berg5cf121c2008-02-25 16:27:43 +0100166 for (i = 0; i < tx->num_extra_frag; i++) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200167 fhdr = (struct ieee80211_hdr *)
Johannes Berg5cf121c2008-02-25 16:27:43 +0100168 tx->extra_frag[i]->data;
Johannes Bergc2d15602007-07-27 15:43:23 +0200169 fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
170 }
171 }
172}
173
174int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
175 int rate, int erp, int short_preamble)
176{
177 int dur;
178
179 /* calculate duration (in microseconds, rounded up to next higher
180 * integer if it includes a fractional microsecond) to send frame of
181 * len bytes (does not include FCS) at the given rate. Duration will
182 * also include SIFS.
183 *
184 * rate is in 100 kbps, so divident is multiplied by 10 in the
185 * DIV_ROUND_UP() operations.
186 */
187
Johannes Berg8318d782008-01-24 19:38:38 +0100188 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200189 /*
190 * OFDM:
191 *
192 * N_DBPS = DATARATE x 4
193 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
194 * (16 = SIGNAL time, 6 = tail bits)
195 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
196 *
197 * T_SYM = 4 usec
198 * 802.11a - 17.5.2: aSIFSTime = 16 usec
199 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
200 * signal ext = 6 usec
201 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200202 dur = 16; /* SIFS + signal ext */
203 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
204 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
205 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
206 4 * rate); /* T_SYM x N_SYM */
207 } else {
208 /*
209 * 802.11b or 802.11g with 802.11b compatibility:
210 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
211 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
212 *
213 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
214 * aSIFSTime = 10 usec
215 * aPreambleLength = 144 usec or 72 usec with short preamble
216 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
217 */
218 dur = 10; /* aSIFSTime = 10 usec */
219 dur += short_preamble ? (72 + 24) : (144 + 48);
220
221 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
222 }
223
224 return dur;
225}
226
227/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100228__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
229 struct ieee80211_vif *vif,
Johannes Berg8318d782008-01-24 19:38:38 +0100230 size_t frame_len,
231 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200232{
233 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg25d834e2008-09-12 22:52:47 +0200234 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200235 u16 dur;
236 int erp;
Johannes Berg25d834e2008-09-12 22:52:47 +0200237 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200238
Johannes Berg8318d782008-01-24 19:38:38 +0100239 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200240 if (vif) {
241 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200242 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200243 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
244 erp = rate->flags & IEEE80211_RATE_ERP_G;
245 }
Johannes Berg8318d782008-01-24 19:38:38 +0100246
247 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
Johannes Berg25d834e2008-09-12 22:52:47 +0200248 short_preamble);
Johannes Bergc2d15602007-07-27 15:43:23 +0200249
250 return cpu_to_le16(dur);
251}
252EXPORT_SYMBOL(ieee80211_generic_frame_duration);
253
Johannes Berg32bfd352007-12-19 01:31:26 +0100254__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
255 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200256 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200257{
258 struct ieee80211_local *local = hw_to_local(hw);
259 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200260 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100261 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200262 int erp;
263 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200264 struct ieee80211_supported_band *sband;
265
266 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200267
Johannes Berg25d834e2008-09-12 22:52:47 +0200268 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200269
Johannes Berge039fa42008-05-15 12:55:29 +0200270 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100271
272 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200273 if (vif) {
274 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200275 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200276 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
277 erp = rate->flags & IEEE80211_RATE_ERP_G;
278 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200279
280 /* CTS duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100281 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200282 erp, short_preamble);
283 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100284 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200285 erp, short_preamble);
286 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100287 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200288 erp, short_preamble);
289
290 return cpu_to_le16(dur);
291}
292EXPORT_SYMBOL(ieee80211_rts_duration);
293
Johannes Berg32bfd352007-12-19 01:31:26 +0100294__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
295 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200296 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200297 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200298{
299 struct ieee80211_local *local = hw_to_local(hw);
300 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200301 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100302 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200303 int erp;
304 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200305 struct ieee80211_supported_band *sband;
306
307 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200308
Johannes Berg25d834e2008-09-12 22:52:47 +0200309 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200310
Johannes Berge039fa42008-05-15 12:55:29 +0200311 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100312 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200313 if (vif) {
314 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200315 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200316 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
317 erp = rate->flags & IEEE80211_RATE_ERP_G;
318 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200319
320 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100321 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200322 erp, short_preamble);
Johannes Berge039fa42008-05-15 12:55:29 +0200323 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200324 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100325 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200326 erp, short_preamble);
327 }
328
Johannes Bergc2d15602007-07-27 15:43:23 +0200329 return cpu_to_le16(dur);
330}
331EXPORT_SYMBOL(ieee80211_ctstoself_duration);
332
Kalle Valoce7c9112008-12-18 23:35:20 +0200333static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200335{
336 struct ieee80211_local *local = hw_to_local(hw);
337
Kalle Valoce7c9112008-12-18 23:35:20 +0200338 /* we don't need to track ampdu queues */
339 if (queue < ieee80211_num_regular_queues(hw)) {
340 __clear_bit(reason, &local->queue_stop_reasons[queue]);
341
342 if (local->queue_stop_reasons[queue] != 0)
343 /* someone still has this queue stopped */
344 return;
345 }
346
Johannes Berge2530082008-05-17 00:57:14 +0200347 if (test_bit(queue, local->queues_pending)) {
Tomas Winklerf8e79dd2008-07-24 18:46:44 +0300348 set_bit(queue, local->queues_pending_run);
Johannes Berge2530082008-05-17 00:57:14 +0200349 tasklet_schedule(&local->tx_pending_tasklet);
350 } else {
David S. Miller51cb6db2008-07-15 03:34:57 -0700351 netif_wake_subqueue(local->mdev, queue);
Johannes Bergc2d15602007-07-27 15:43:23 +0200352 }
353}
Kalle Valoce7c9112008-12-18 23:35:20 +0200354
355void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
356 enum queue_stop_reason reason)
357{
358 struct ieee80211_local *local = hw_to_local(hw);
359 unsigned long flags;
360
361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
362 __ieee80211_wake_queue(hw, queue, reason);
363 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
364}
365
366void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
367{
368 ieee80211_wake_queue_by_reason(hw, queue,
369 IEEE80211_QUEUE_STOP_REASON_DRIVER);
370}
Johannes Bergc2d15602007-07-27 15:43:23 +0200371EXPORT_SYMBOL(ieee80211_wake_queue);
372
Kalle Valoce7c9112008-12-18 23:35:20 +0200373static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
374 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200375{
376 struct ieee80211_local *local = hw_to_local(hw);
377
Kalle Valoce7c9112008-12-18 23:35:20 +0200378 /* we don't need to track ampdu queues */
379 if (queue < ieee80211_num_regular_queues(hw))
380 __set_bit(reason, &local->queue_stop_reasons[queue]);
381
David S. Miller51cb6db2008-07-15 03:34:57 -0700382 netif_stop_subqueue(local->mdev, queue);
Johannes Bergc2d15602007-07-27 15:43:23 +0200383}
Kalle Valoce7c9112008-12-18 23:35:20 +0200384
385void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
386 enum queue_stop_reason reason)
387{
388 struct ieee80211_local *local = hw_to_local(hw);
389 unsigned long flags;
390
391 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
392 __ieee80211_stop_queue(hw, queue, reason);
393 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
394}
395
396void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
397{
398 ieee80211_stop_queue_by_reason(hw, queue,
399 IEEE80211_QUEUE_STOP_REASON_DRIVER);
400}
Johannes Bergc2d15602007-07-27 15:43:23 +0200401EXPORT_SYMBOL(ieee80211_stop_queue);
402
Kalle Valoce7c9112008-12-18 23:35:20 +0200403void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
404 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200405{
Kalle Valoce7c9112008-12-18 23:35:20 +0200406 struct ieee80211_local *local = hw_to_local(hw);
407 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200408 int i;
409
Kalle Valoce7c9112008-12-18 23:35:20 +0200410 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
411
Johannes Berge2530082008-05-17 00:57:14 +0200412 for (i = 0; i < ieee80211_num_queues(hw); i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200413 __ieee80211_stop_queue(hw, i, reason);
414
415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
416}
417
418void ieee80211_stop_queues(struct ieee80211_hw *hw)
419{
420 ieee80211_stop_queues_by_reason(hw,
421 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200422}
423EXPORT_SYMBOL(ieee80211_stop_queues);
424
Tomas Winkler92ab8532008-07-24 21:02:04 +0300425int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
426{
427 struct ieee80211_local *local = hw_to_local(hw);
428 return __netif_subqueue_stopped(local->mdev, queue);
429}
430EXPORT_SYMBOL(ieee80211_queue_stopped);
431
Kalle Valoce7c9112008-12-18 23:35:20 +0200432void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
433 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200434{
Kalle Valoce7c9112008-12-18 23:35:20 +0200435 struct ieee80211_local *local = hw_to_local(hw);
436 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200437 int i;
438
Kalle Valoce7c9112008-12-18 23:35:20 +0200439 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
440
Johannes Bergc46804702008-05-15 12:55:25 +0200441 for (i = 0; i < hw->queues + hw->ampdu_queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200442 __ieee80211_wake_queue(hw, i, reason);
443
444 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
445}
446
447void ieee80211_wake_queues(struct ieee80211_hw *hw)
448{
449 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200450}
451EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100452
Johannes Berg32bfd352007-12-19 01:31:26 +0100453void ieee80211_iterate_active_interfaces(
454 struct ieee80211_hw *hw,
455 void (*iterator)(void *data, u8 *mac,
456 struct ieee80211_vif *vif),
457 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100458{
459 struct ieee80211_local *local = hw_to_local(hw);
460 struct ieee80211_sub_if_data *sdata;
461
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200462 rtnl_lock();
463
464 list_for_each_entry(sdata, &local->interfaces, list) {
465 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200466 case __NL80211_IFTYPE_AFTER_LAST:
467 case NL80211_IFTYPE_UNSPECIFIED:
468 case NL80211_IFTYPE_MONITOR:
469 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200470 continue;
Johannes Berg05c914f2008-09-11 00:01:58 +0200471 case NL80211_IFTYPE_AP:
472 case NL80211_IFTYPE_STATION:
473 case NL80211_IFTYPE_ADHOC:
474 case NL80211_IFTYPE_WDS:
475 case NL80211_IFTYPE_MESH_POINT:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200476 break;
477 }
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200478 if (netif_running(sdata->dev))
479 iterator(data, sdata->dev->dev_addr,
480 &sdata->vif);
481 }
482
483 rtnl_unlock();
484}
485EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
486
487void ieee80211_iterate_active_interfaces_atomic(
488 struct ieee80211_hw *hw,
489 void (*iterator)(void *data, u8 *mac,
490 struct ieee80211_vif *vif),
491 void *data)
492{
493 struct ieee80211_local *local = hw_to_local(hw);
494 struct ieee80211_sub_if_data *sdata;
495
Johannes Berge38bad42007-11-28 10:55:32 +0100496 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100497
Johannes Berge38bad42007-11-28 10:55:32 +0100498 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100499 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200500 case __NL80211_IFTYPE_AFTER_LAST:
501 case NL80211_IFTYPE_UNSPECIFIED:
502 case NL80211_IFTYPE_MONITOR:
503 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100504 continue;
Johannes Berg05c914f2008-09-11 00:01:58 +0200505 case NL80211_IFTYPE_AP:
506 case NL80211_IFTYPE_STATION:
507 case NL80211_IFTYPE_ADHOC:
508 case NL80211_IFTYPE_WDS:
509 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergdabeb342007-11-09 01:57:29 +0100510 break;
511 }
Johannes Bergdabeb342007-11-09 01:57:29 +0100512 if (netif_running(sdata->dev))
513 iterator(data, sdata->dev->dev_addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100514 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100515 }
Johannes Berge38bad42007-11-28 10:55:32 +0100516
517 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100518}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200519EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200520
521void ieee802_11_parse_elems(u8 *start, size_t len,
522 struct ieee802_11_elems *elems)
523{
524 size_t left = len;
525 u8 *pos = start;
526
527 memset(elems, 0, sizeof(*elems));
528 elems->ie_start = start;
529 elems->total_len = len;
530
531 while (left >= 2) {
532 u8 id, elen;
533
534 id = *pos++;
535 elen = *pos++;
536 left -= 2;
537
538 if (elen > left)
539 return;
540
541 switch (id) {
542 case WLAN_EID_SSID:
543 elems->ssid = pos;
544 elems->ssid_len = elen;
545 break;
546 case WLAN_EID_SUPP_RATES:
547 elems->supp_rates = pos;
548 elems->supp_rates_len = elen;
549 break;
550 case WLAN_EID_FH_PARAMS:
551 elems->fh_params = pos;
552 elems->fh_params_len = elen;
553 break;
554 case WLAN_EID_DS_PARAMS:
555 elems->ds_params = pos;
556 elems->ds_params_len = elen;
557 break;
558 case WLAN_EID_CF_PARAMS:
559 elems->cf_params = pos;
560 elems->cf_params_len = elen;
561 break;
562 case WLAN_EID_TIM:
563 elems->tim = pos;
564 elems->tim_len = elen;
565 break;
566 case WLAN_EID_IBSS_PARAMS:
567 elems->ibss_params = pos;
568 elems->ibss_params_len = elen;
569 break;
570 case WLAN_EID_CHALLENGE:
571 elems->challenge = pos;
572 elems->challenge_len = elen;
573 break;
574 case WLAN_EID_WPA:
575 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
576 pos[2] == 0xf2) {
577 /* Microsoft OUI (00:50:F2) */
578 if (pos[3] == 1) {
579 /* OUI Type 1 - WPA IE */
580 elems->wpa = pos;
581 elems->wpa_len = elen;
582 } else if (elen >= 5 && pos[3] == 2) {
583 if (pos[4] == 0) {
584 elems->wmm_info = pos;
585 elems->wmm_info_len = elen;
586 } else if (pos[4] == 1) {
587 elems->wmm_param = pos;
588 elems->wmm_param_len = elen;
589 }
590 }
591 }
592 break;
593 case WLAN_EID_RSN:
594 elems->rsn = pos;
595 elems->rsn_len = elen;
596 break;
597 case WLAN_EID_ERP_INFO:
598 elems->erp_info = pos;
599 elems->erp_info_len = elen;
600 break;
601 case WLAN_EID_EXT_SUPP_RATES:
602 elems->ext_supp_rates = pos;
603 elems->ext_supp_rates_len = elen;
604 break;
605 case WLAN_EID_HT_CAPABILITY:
Johannes Berg09914812008-10-07 19:31:17 +0200606 if (elen >= sizeof(struct ieee80211_ht_cap))
607 elems->ht_cap_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200608 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200609 case WLAN_EID_HT_INFORMATION:
610 if (elen >= sizeof(struct ieee80211_ht_info))
Johannes Berg09914812008-10-07 19:31:17 +0200611 elems->ht_info_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200612 break;
613 case WLAN_EID_MESH_ID:
614 elems->mesh_id = pos;
615 elems->mesh_id_len = elen;
616 break;
617 case WLAN_EID_MESH_CONFIG:
618 elems->mesh_config = pos;
619 elems->mesh_config_len = elen;
620 break;
621 case WLAN_EID_PEER_LINK:
622 elems->peer_link = pos;
623 elems->peer_link_len = elen;
624 break;
625 case WLAN_EID_PREQ:
626 elems->preq = pos;
627 elems->preq_len = elen;
628 break;
629 case WLAN_EID_PREP:
630 elems->prep = pos;
631 elems->prep_len = elen;
632 break;
633 case WLAN_EID_PERR:
634 elems->perr = pos;
635 elems->perr_len = elen;
636 break;
637 case WLAN_EID_CHANNEL_SWITCH:
638 elems->ch_switch_elem = pos;
639 elems->ch_switch_elem_len = elen;
640 break;
641 case WLAN_EID_QUIET:
642 if (!elems->quiet_elem) {
643 elems->quiet_elem = pos;
644 elems->quiet_elem_len = elen;
645 }
646 elems->num_of_quiet_elem++;
647 break;
648 case WLAN_EID_COUNTRY:
649 elems->country_elem = pos;
650 elems->country_elem_len = elen;
651 break;
652 case WLAN_EID_PWR_CONSTRAINT:
653 elems->pwr_constr_elem = pos;
654 elems->pwr_constr_elem_len = elen;
655 break;
656 default:
657 break;
658 }
659
660 left -= elen;
661 pos += elen;
662 }
663}
Johannes Berg5825fe102008-09-09 12:56:01 +0200664
665void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
666{
667 struct ieee80211_local *local = sdata->local;
668 struct ieee80211_tx_queue_params qparam;
669 int i;
670
671 if (!local->ops->conf_tx)
672 return;
673
674 memset(&qparam, 0, sizeof(qparam));
675
676 qparam.aifs = 2;
677
678 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
679 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
680 qparam.cw_min = 31;
681 else
682 qparam.cw_min = 15;
683
684 qparam.cw_max = 1023;
685 qparam.txop = 0;
686
687 for (i = 0; i < local_to_hw(local)->queues; i++)
688 local->ops->conf_tx(local_to_hw(local), i, &qparam);
689}
Johannes Berge50db652008-09-09 15:07:09 +0200690
691void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
692 int encrypt)
693{
694 skb->dev = sdata->local->mdev;
695 skb_set_mac_header(skb, 0);
696 skb_set_network_header(skb, 0);
697 skb_set_transport_header(skb, 0);
698
699 skb->iif = sdata->dev->ifindex;
700 skb->do_not_encrypt = !encrypt;
701
702 dev_queue_xmit(skb);
703}
Johannes Berge16751c2008-09-11 00:01:53 +0200704
705int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
706{
707 int ret = -EINVAL;
708 struct ieee80211_channel *chan;
709 struct ieee80211_local *local = sdata->local;
710
711 chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);
712
713 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200714 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
Johannes Bergd73782f2008-10-07 12:04:34 +0200715 chan->flags & IEEE80211_CHAN_NO_IBSS)
Johannes Berge16751c2008-09-11 00:01:53 +0200716 return ret;
Johannes Berge16751c2008-09-11 00:01:53 +0200717 local->oper_channel = chan;
Sujith094d05d2008-12-12 11:57:43 +0530718 local->oper_channel_type = NL80211_CHAN_NO_HT;
Johannes Berge16751c2008-09-11 00:01:53 +0200719
Johannes Bergc2b13452008-09-11 00:01:55 +0200720 if (local->sw_scanning || local->hw_scanning)
Johannes Berge16751c2008-09-11 00:01:53 +0200721 ret = 0;
722 else
Johannes Berge8975582008-10-09 12:18:51 +0200723 ret = ieee80211_hw_config(
724 local, IEEE80211_CONF_CHANGE_CHANNEL);
Johannes Berge16751c2008-09-11 00:01:53 +0200725 }
726
727 return ret;
728}
Johannes Berg96dd22a2008-09-11 00:01:57 +0200729
730u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
731 enum ieee80211_band band)
732{
733 struct ieee80211_supported_band *sband;
734 struct ieee80211_rate *bitrates;
735 u64 mandatory_rates;
736 enum ieee80211_rate_flags mandatory_flag;
737 int i;
738
739 sband = local->hw.wiphy->bands[band];
740 if (!sband) {
741 WARN_ON(1);
742 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
743 }
744
745 if (band == IEEE80211_BAND_2GHZ)
746 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
747 else
748 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
749
750 bitrates = sband->bitrates;
751 mandatory_rates = 0;
752 for (i = 0; i < sband->n_bitrates; i++)
753 if (bitrates[i].flags & mandatory_flag)
754 mandatory_rates |= BIT(i);
755 return mandatory_rates;
756}