blob: 058686a721a1de5e1145da56d3f176d1e08ed739 [file] [log] [blame]
Johannes Berge2ebc742007-07-27 15:43:22 +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>
Johannes Bergd98ad832014-09-03 15:24:57 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Berge2ebc742007-07-27 15:43:22 +02007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 *
13 * Transmit and frame generation functions.
14 */
15
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/bitmap.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040021#include <linux/rcupdate.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040022#include <linux/export.h>
Matti Gottliebad38bfc2013-11-18 19:06:45 +020023#include <linux/time.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070024#include <net/net_namespace.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020025#include <net/ieee80211_radiotap.h>
26#include <net/cfg80211.h>
27#include <net/mac80211.h>
28#include <asm/unaligned.h>
29
30#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020031#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040032#include "led.h"
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +010033#include "mesh.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020034#include "wep.h"
35#include "wpa.h"
36#include "wme.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040037#include "rate.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020038
Johannes Berge2ebc742007-07-27 15:43:22 +020039/* misc utils */
40
Johannes Berg252b86c2011-11-16 15:28:55 +010041static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
42 struct sk_buff *skb, int group_addr,
Johannes Berg03f93c32008-06-25 14:36:27 +030043 int next_frag_len)
Johannes Berge2ebc742007-07-27 15:43:22 +020044{
Simon Wunderlich2103dec2013-07-08 16:55:53 +020045 int rate, mrate, erp, dur, i, shift = 0;
Johannes Berg2e92e6f2008-05-15 12:55:27 +020046 struct ieee80211_rate *txrate;
Johannes Berge2ebc742007-07-27 15:43:22 +020047 struct ieee80211_local *local = tx->local;
Johannes Berg8318d782008-01-24 19:38:38 +010048 struct ieee80211_supported_band *sband;
Harvey Harrison358c8d92008-07-15 18:44:13 -070049 struct ieee80211_hdr *hdr;
Johannes Berg252b86c2011-11-16 15:28:55 +010050 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Simon Wunderlich2103dec2013-07-08 16:55:53 +020051 struct ieee80211_chanctx_conf *chanctx_conf;
52 u32 rate_flags = 0;
53
54 rcu_read_lock();
55 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
56 if (chanctx_conf) {
57 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
58 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
59 }
60 rcu_read_unlock();
Johannes Berge6a98542008-10-21 12:40:02 +020061
62 /* assume HW handles this */
Felix Fietkau336004e2014-11-21 23:29:14 +010063 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
Johannes Berge6a98542008-10-21 12:40:02 +020064 return 0;
65
66 /* uh huh? */
Felix Fietkau0d528d82013-04-22 16:14:41 +020067 if (WARN_ON_ONCE(tx->rate.idx < 0))
Johannes Berge6a98542008-10-21 12:40:02 +020068 return 0;
Johannes Berge2ebc742007-07-27 15:43:22 +020069
Johannes Berg2d565772012-07-23 15:12:51 +020070 sband = local->hw.wiphy->bands[info->band];
Felix Fietkau0d528d82013-04-22 16:14:41 +020071 txrate = &sband->bitrates[tx->rate.idx];
Johannes Berg8318d782008-01-24 19:38:38 +010072
Johannes Berge6a98542008-10-21 12:40:02 +020073 erp = txrate->flags & IEEE80211_RATE_ERP_G;
Johannes Berge2ebc742007-07-27 15:43:22 +020074
75 /*
76 * data and mgmt (except PS Poll):
77 * - during CFP: 32768
78 * - during contention period:
79 * if addr1 is group address: 0
80 * if more fragments = 0 and addr1 is individual address: time to
81 * transmit one ACK plus SIFS
82 * if more fragments = 1 and addr1 is individual address: time to
83 * transmit next fragment plus 2 x ACK plus 3 x SIFS
84 *
85 * IEEE 802.11, 9.6:
86 * - control response frame (CTS or ACK) shall be transmitted using the
87 * same rate as the immediately previous frame in the frame exchange
88 * sequence, if this rate belongs to the PHY mandatory rates, or else
89 * at the highest possible rate belonging to the PHY rates in the
90 * BSSBasicRateSet
91 */
Johannes Berg252b86c2011-11-16 15:28:55 +010092 hdr = (struct ieee80211_hdr *)skb->data;
Harvey Harrison358c8d92008-07-15 18:44:13 -070093 if (ieee80211_is_ctl(hdr->frame_control)) {
Johannes Berge2ebc742007-07-27 15:43:22 +020094 /* TODO: These control frames are not currently sent by
Johannes Bergccd7b362008-09-11 00:01:56 +020095 * mac80211, but should they be implemented, this function
Johannes Berge2ebc742007-07-27 15:43:22 +020096 * needs to be updated to support duration field calculation.
97 *
98 * RTS: time needed to transmit pending data/mgmt frame plus
99 * one CTS frame plus one ACK frame plus 3 x SIFS
100 * CTS: duration of immediately previous RTS minus time
101 * required to transmit CTS and its SIFS
102 * ACK: 0 if immediately previous directed data/mgmt had
103 * more=0, with more=1 duration in ACK frame is duration
104 * from previous frame minus time needed to transmit ACK
105 * and its SIFS
106 * PS Poll: BIT(15) | BIT(14) | aid
107 */
108 return 0;
109 }
110
111 /* data/mgmt */
112 if (0 /* FIX: data/mgmt during CFP */)
Johannes Berg03f93c32008-06-25 14:36:27 +0300113 return cpu_to_le16(32768);
Johannes Berge2ebc742007-07-27 15:43:22 +0200114
115 if (group_addr) /* Group address as the destination - no ACK */
116 return 0;
117
118 /* Individual destination address:
119 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
120 * CTS and ACK frames shall be transmitted using the highest rate in
121 * basic rate set that is less than or equal to the rate of the
122 * immediately previous frame and that is using the same modulation
123 * (CCK or OFDM). If no basic rate set matches with these requirements,
124 * the highest mandatory rate of the PHY that is less than or equal to
125 * the rate of the previous frame is used.
126 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
127 */
128 rate = -1;
Johannes Berg8318d782008-01-24 19:38:38 +0100129 /* use lowest available if everything fails */
130 mrate = sband->bitrates[0].bitrate;
131 for (i = 0; i < sband->n_bitrates; i++) {
132 struct ieee80211_rate *r = &sband->bitrates[i];
133
134 if (r->bitrate > txrate->bitrate)
Johannes Berge2ebc742007-07-27 15:43:22 +0200135 break;
136
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200137 if ((rate_flags & r->flags) != rate_flags)
138 continue;
139
Johannes Bergbda39332008-10-11 01:51:51 +0200140 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200141 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200142
Johannes Berg8318d782008-01-24 19:38:38 +0100143 switch (sband->band) {
144 case IEEE80211_BAND_2GHZ: {
145 u32 flag;
146 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 flag = IEEE80211_RATE_MANDATORY_G;
148 else
149 flag = IEEE80211_RATE_MANDATORY_B;
150 if (r->flags & flag)
151 mrate = r->bitrate;
152 break;
153 }
154 case IEEE80211_BAND_5GHZ:
155 if (r->flags & IEEE80211_RATE_MANDATORY_A)
156 mrate = r->bitrate;
157 break;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300158 case IEEE80211_BAND_60GHZ:
159 /* TODO, for now fall through */
Johannes Berg8318d782008-01-24 19:38:38 +0100160 case IEEE80211_NUM_BANDS:
161 WARN_ON(1);
162 break;
163 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200164 }
165 if (rate == -1) {
166 /* No matching basic rate found; use highest suitable mandatory
167 * PHY rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200168 rate = DIV_ROUND_UP(mrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200169 }
170
Simon Wunderlich6674f212011-11-21 21:34:30 +0100171 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
172 if (ieee80211_is_data_qos(hdr->frame_control) &&
Claudio Pisac26a0e12012-05-28 13:06:25 +0100173 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
Simon Wunderlich6674f212011-11-21 21:34:30 +0100174 dur = 0;
175 else
176 /* Time needed to transmit ACK
177 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
178 * to closest integer */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200179 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200180 tx->sdata->vif.bss_conf.use_short_preamble,
181 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200182
183 if (next_frag_len) {
184 /* Frame is fragmented: duration increases with time needed to
185 * transmit next fragment plus ACK and 2 x SIFS. */
186 dur *= 2; /* ACK + SIFS */
187 /* next fragment */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200188 dur += ieee80211_frame_duration(sband->band, next_frag_len,
Johannes Berg8318d782008-01-24 19:38:38 +0100189 txrate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200190 tx->sdata->vif.bss_conf.use_short_preamble,
191 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200192 }
193
Johannes Berg03f93c32008-06-25 14:36:27 +0300194 return cpu_to_le16(dur);
Johannes Berge2ebc742007-07-27 15:43:22 +0200195}
196
Johannes Berge2ebc742007-07-27 15:43:22 +0200197/* tx handlers */
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200198static ieee80211_tx_result debug_noinline
199ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
200{
201 struct ieee80211_local *local = tx->local;
Kalle Valo0c742112010-01-12 10:42:53 +0200202 struct ieee80211_if_managed *ifmgd;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200203
204 /* driver doesn't support power save */
205 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
206 return TX_CONTINUE;
207
208 /* hardware does dynamic power save */
209 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
210 return TX_CONTINUE;
211
212 /* dynamic power save disabled */
213 if (local->hw.conf.dynamic_ps_timeout <= 0)
214 return TX_CONTINUE;
215
216 /* we are scanning, don't enable power save */
217 if (local->scanning)
218 return TX_CONTINUE;
219
220 if (!local->ps_sdata)
221 return TX_CONTINUE;
222
223 /* No point if we're going to suspend */
224 if (local->quiescing)
225 return TX_CONTINUE;
226
Kalle Valo0c742112010-01-12 10:42:53 +0200227 /* dynamic ps is supported only in managed mode */
228 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
229 return TX_CONTINUE;
230
231 ifmgd = &tx->sdata->u.mgd;
232
233 /*
234 * Don't wakeup from power save if u-apsd is enabled, voip ac has
235 * u-apsd enabled and the frame is in voip class. This effectively
236 * means that even if all access categories have u-apsd enabled, in
237 * practise u-apsd is only used with the voip ac. This is a
238 * workaround for the case when received voip class packets do not
239 * have correct qos tag for some reason, due the network or the
240 * peer application.
241 *
Eliad Pellerdc41e4d2012-03-14 16:15:03 +0200242 * Note: ifmgd->uapsd_queues access is racy here. If the value is
Kalle Valo0c742112010-01-12 10:42:53 +0200243 * changed via debugfs, user needs to reassociate manually to have
244 * everything in sync.
245 */
Johannes Berg4875d30d2012-03-27 14:18:37 +0200246 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
247 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
248 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
Kalle Valo0c742112010-01-12 10:42:53 +0200249 return TX_CONTINUE;
250
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200251 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
252 ieee80211_stop_queues_by_reason(&local->hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100253 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300254 IEEE80211_QUEUE_STOP_REASON_PS,
255 false);
Vivek Natarajandb285692011-02-18 17:18:03 +0530256 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200257 ieee80211_queue_work(&local->hw,
258 &local->dynamic_ps_disable_work);
259 }
260
Luciano Coelho5db1c072011-05-03 21:40:08 +0300261 /* Don't restart the timer if we're not disassociated */
262 if (!ifmgd->associated)
263 return TX_CONTINUE;
264
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200265 mod_timer(&local->dynamic_ps_timer, jiffies +
266 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
267
268 return TX_CONTINUE;
269}
Johannes Berge2ebc742007-07-27 15:43:22 +0200270
Johannes Bergd9e8a702008-06-30 15:10:44 +0200271static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100272ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200273{
Harvey Harrison358c8d92008-07-15 18:44:13 -0700274
Johannes Berge039fa42008-05-15 12:55:29 +0200275 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Berge039fa42008-05-15 12:55:29 +0200276 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200277 bool assoc = false;
Johannes Berge2ebc742007-07-27 15:43:22 +0200278
Johannes Berge039fa42008-05-15 12:55:29 +0200279 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100280 return TX_CONTINUE;
Johannes Berg58d41852007-09-26 17:53:18 +0200281
Ben Greearb23b0252011-02-04 11:54:17 -0800282 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
283 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
Kalle Valoa9a6fff2009-03-18 14:06:44 +0200284 !ieee80211_is_probe_req(hdr->frame_control) &&
285 !ieee80211_is_nullfunc(hdr->frame_control))
286 /*
287 * When software scanning only nullfunc frames (to notify
288 * the sleep state to the AP) and probe requests (for the
289 * active scan) are allowed, all other frames should not be
290 * sent and we should not get here, but if we do
291 * nonetheless, drop them to avoid sending them
292 * off-channel. See the link below and
293 * ieee80211_start_scan() for more.
294 *
295 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
296 */
Johannes Berg9ae54c82008-01-31 19:48:20 +0100297 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200298
Rostislav Lisovy239281f2014-11-03 10:33:19 +0100299 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
300 return TX_CONTINUE;
301
Bill Jordan1be7fe82010-10-01 11:20:41 -0400302 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
303 return TX_CONTINUE;
304
Johannes Berg05c914f2008-09-11 00:01:58 +0200305 if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +0100306 return TX_CONTINUE;
307
Johannes Berg5cf121c2008-02-25 16:27:43 +0100308 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
Johannes Berg9ae54c82008-01-31 19:48:20 +0100309 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200310
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200311 if (tx->sta)
312 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge2ebc742007-07-27 15:43:22 +0200313
Johannes Berg5cf121c2008-02-25 16:27:43 +0100314 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200315 if (unlikely(!assoc &&
Harvey Harrison358c8d92008-07-15 18:44:13 -0700316 ieee80211_is_data(hdr->frame_control))) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200317#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200318 sdata_info(tx->sdata,
319 "dropped data frame to not associated station %pM\n",
320 hdr->addr1);
321#endif
Johannes Berge2ebc742007-07-27 15:43:22 +0200322 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
Johannes Berg9ae54c82008-01-31 19:48:20 +0100323 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200324 }
Johannes Berg29623892011-12-14 12:20:31 +0100325 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
326 ieee80211_is_data(hdr->frame_control) &&
Felix Fietkau030ef8f2012-04-23 19:49:02 +0200327 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
Johannes Berg29623892011-12-14 12:20:31 +0100328 /*
329 * No associated STAs - no need to send multicast
330 * frames.
331 */
332 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200333 }
334
Johannes Berg9ae54c82008-01-31 19:48:20 +0100335 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200336}
337
Johannes Berge2ebc742007-07-27 15:43:22 +0200338/* This function is called whenever the AP is about to exceed the maximum limit
339 * of buffered frames for power saving STAs. This situation should not really
340 * happen often during normal operation, so dropping the oldest buffered packet
341 * from each queue should be OK to make some room for new frames. */
342static void purge_old_ps_buffers(struct ieee80211_local *local)
343{
344 int total = 0, purged = 0;
345 struct sk_buff *skb;
346 struct ieee80211_sub_if_data *sdata;
347 struct sta_info *sta;
348
Johannes Berg79010422007-09-18 17:29:21 -0400349 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Marco Porschd012a602012-10-10 12:39:50 -0700350 struct ps_data *ps;
351
352 if (sdata->vif.type == NL80211_IFTYPE_AP)
353 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100354 else if (ieee80211_vif_is_mesh(&sdata->vif))
355 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700356 else
Johannes Berge2ebc742007-07-27 15:43:22 +0200357 continue;
Marco Porschd012a602012-10-10 12:39:50 -0700358
359 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200360 if (skb) {
361 purged++;
362 dev_kfree_skb(skb);
363 }
Marco Porschd012a602012-10-10 12:39:50 -0700364 total += skb_queue_len(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200365 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200366
Johannes Berg948d8872011-09-29 16:04:29 +0200367 /*
368 * Drop one frame from each station from the lowest-priority
369 * AC that has frames at all.
370 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100371 list_for_each_entry_rcu(sta, &local->sta_list, list) {
Johannes Berg948d8872011-09-29 16:04:29 +0200372 int ac;
373
374 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
375 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
376 total += skb_queue_len(&sta->ps_tx_buf[ac]);
377 if (skb) {
378 purged++;
Felix Fietkauc3e77242012-10-08 14:39:33 +0200379 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg948d8872011-09-29 16:04:29 +0200380 break;
381 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200382 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200383 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100384
Johannes Berge2ebc742007-07-27 15:43:22 +0200385 local->total_ps_buffered = total;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200386 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
Johannes Berge2ebc742007-07-27 15:43:22 +0200387}
388
Johannes Berg9ae54c82008-01-31 19:48:20 +0100389static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100390ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200391{
Johannes Berge039fa42008-05-15 12:55:29 +0200392 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700393 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Marco Porschd012a602012-10-10 12:39:50 -0700394 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +0200395
Johannes Berg7d54d0d2007-12-19 01:31:25 +0100396 /*
397 * broadcast/multicast frame
398 *
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100399 * If any of the associated/peer stations is in power save mode,
Johannes Berg7d54d0d2007-12-19 01:31:25 +0100400 * the frame is buffered to be sent after DTIM beacon frame.
401 * This is done either by the hardware or us.
402 */
403
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100404 /* powersaving STAs currently only in AP/VLAN/mesh mode */
Marco Porschd012a602012-10-10 12:39:50 -0700405 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
406 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
407 if (!tx->sdata->bss)
408 return TX_CONTINUE;
409
410 ps = &tx->sdata->bss->ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100411 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
412 ps = &tx->sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700413 } else {
Johannes Berg3e122be2008-07-09 14:40:34 +0200414 return TX_CONTINUE;
Marco Porschd012a602012-10-10 12:39:50 -0700415 }
416
Johannes Berg3e122be2008-07-09 14:40:34 +0200417
418 /* no buffering for ordered frames */
Harvey Harrison358c8d92008-07-15 18:44:13 -0700419 if (ieee80211_has_order(hdr->frame_control))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100420 return TX_CONTINUE;
Johannes Berg7d54d0d2007-12-19 01:31:25 +0100421
Johannes Berg08b99392014-07-07 12:01:11 +0200422 if (ieee80211_is_probe_req(hdr->frame_control))
423 return TX_CONTINUE;
424
Johannes Bergf4d57942013-05-28 17:24:15 +0200425 if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
426 info->hw_queue = tx->sdata->vif.cab_queue;
427
Johannes Berg7d54d0d2007-12-19 01:31:25 +0100428 /* no stations in PS mode */
Marco Porschd012a602012-10-10 12:39:50 -0700429 if (!atomic_read(&ps->num_sta_ps))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100430 return TX_CONTINUE;
Johannes Berg7d54d0d2007-12-19 01:31:25 +0100431
Johannes Berg62b517c2009-10-29 12:19:21 +0100432 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
Johannes Berg62b12082009-08-10 16:04:15 +0200433
Johannes Berg62b517c2009-10-29 12:19:21 +0100434 /* device releases frame after DTIM beacon */
435 if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING))
Johannes Berg62b12082009-08-10 16:04:15 +0200436 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200437
Johannes Berg62b12082009-08-10 16:04:15 +0200438 /* buffered in mac80211 */
439 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
440 purge_old_ps_buffers(tx->local);
Johannes Berg7d54d0d2007-12-19 01:31:25 +0100441
Marco Porschd012a602012-10-10 12:39:50 -0700442 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200443 ps_dbg(tx->sdata,
444 "BC TX buffer full - dropping the oldest frame\n");
Marco Porschd012a602012-10-10 12:39:50 -0700445 dev_kfree_skb(skb_dequeue(&ps->bc_buf));
Johannes Berg62b12082009-08-10 16:04:15 +0200446 } else
447 tx->local->total_ps_buffered++;
448
Marco Porschd012a602012-10-10 12:39:50 -0700449 skb_queue_tail(&ps->bc_buf, tx->skb);
Johannes Berg62b12082009-08-10 16:04:15 +0200450
451 return TX_QUEUED;
Johannes Berge2ebc742007-07-27 15:43:22 +0200452}
453
Jouni Malinenfb733332009-01-08 13:32:00 +0200454static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
455 struct sk_buff *skb)
456{
457 if (!ieee80211_is_mgmt(fc))
458 return 0;
459
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200460 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
Jouni Malinenfb733332009-01-08 13:32:00 +0200461 return 0;
462
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100463 if (!ieee80211_is_robust_mgmt_frame(skb))
Jouni Malinenfb733332009-01-08 13:32:00 +0200464 return 0;
465
466 return 1;
467}
468
Johannes Berg9ae54c82008-01-31 19:48:20 +0100469static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100470ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200471{
472 struct sta_info *sta = tx->sta;
Johannes Berge039fa42008-05-15 12:55:29 +0200473 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg08b99392014-07-07 12:01:11 +0200474 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300475 struct ieee80211_local *local = tx->local;
Johannes Berge2ebc742007-07-27 15:43:22 +0200476
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100477 if (unlikely(!sta))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100478 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200479
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200480 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
Johannes Berg5ac2e352014-05-27 16:32:27 +0200481 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
482 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100483 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
Johannes Berg948d8872011-09-29 16:04:29 +0200484 int ac = skb_get_queue_mapping(tx->skb);
485
Johannes Berg08b99392014-07-07 12:01:11 +0200486 if (ieee80211_is_mgmt(hdr->frame_control) &&
487 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
488 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
489 return TX_CONTINUE;
490 }
491
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200492 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
493 sta->sta.addr, sta->sta.aid, ac);
Johannes Berge2ebc742007-07-27 15:43:22 +0200494 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
495 purge_old_ps_buffers(tx->local);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200496
497 /* sync with ieee80211_sta_ps_deliver_wakeup */
498 spin_lock(&sta->ps_lock);
499 /*
500 * STA woke up the meantime and all the frames on ps_tx_buf have
501 * been queued to pending queue. No reordering can happen, go
502 * ahead and Tx the packet.
503 */
504 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Berg5ac2e352014-05-27 16:32:27 +0200505 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
506 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200507 spin_unlock(&sta->ps_lock);
508 return TX_CONTINUE;
509 }
510
Johannes Berg948d8872011-09-29 16:04:29 +0200511 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
512 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200513 ps_dbg(tx->sdata,
514 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
515 sta->sta.addr, ac);
Felix Fietkauc3e77242012-10-08 14:39:33 +0200516 ieee80211_free_txskb(&local->hw, old);
Johannes Berge2ebc742007-07-27 15:43:22 +0200517 } else
518 tx->local->total_ps_buffered++;
Johannes Berg004c8722008-02-20 11:21:35 +0100519
Johannes Berge039fa42008-05-15 12:55:29 +0200520 info->control.jiffies = jiffies;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200521 info->control.vif = &tx->sdata->vif;
Johannes Berg8f77f382009-06-07 21:58:37 +0200522 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Johannes Berg03c8c062014-01-09 01:45:28 +0100523 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berg948d8872011-09-29 16:04:29 +0200524 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200525 spin_unlock(&sta->ps_lock);
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300526
527 if (!timer_pending(&local->sta_cleanup))
528 mod_timer(&local->sta_cleanup,
529 round_jiffies(jiffies +
530 STA_INFO_CLEANUP_INTERVAL));
531
Johannes Bergc868cb352011-09-29 16:04:27 +0200532 /*
533 * We queued up some frames, so the TIM bit might
534 * need to be set, recalculate it.
535 */
536 sta_info_recalc_tim(sta);
537
Johannes Berg9ae54c82008-01-31 19:48:20 +0100538 return TX_QUEUED;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200539 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
540 ps_dbg(tx->sdata,
541 "STA %pM in PS mode, but polling/in SP -> send frame\n",
542 sta->sta.addr);
Johannes Berge2ebc742007-07-27 15:43:22 +0200543 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200544
Johannes Berg9ae54c82008-01-31 19:48:20 +0100545 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200546}
547
Johannes Bergd9e8a702008-06-30 15:10:44 +0200548static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100549ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200550{
Johannes Berg5cf121c2008-02-25 16:27:43 +0100551 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100552 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200553
Johannes Berg5cf121c2008-02-25 16:27:43 +0100554 if (tx->flags & IEEE80211_TX_UNICAST)
Johannes Berge2ebc742007-07-27 15:43:22 +0200555 return ieee80211_tx_h_unicast_ps_buf(tx);
556 else
557 return ieee80211_tx_h_multicast_ps_buf(tx);
558}
559
Johannes Bergd9e8a702008-06-30 15:10:44 +0200560static ieee80211_tx_result debug_noinline
Johannes Berga621fa42010-08-27 14:26:54 +0300561ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
562{
563 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
564
Johannes Bergaf61a162013-07-02 18:09:12 +0200565 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
566 if (tx->sdata->control_port_no_encrypt)
567 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
568 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
569 }
Johannes Berga621fa42010-08-27 14:26:54 +0300570
571 return TX_CONTINUE;
572}
573
574static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100575ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200576{
Johannes Berg46e6de12012-07-04 18:10:07 +0200577 struct ieee80211_key *key;
Johannes Berge039fa42008-05-15 12:55:29 +0200578 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700579 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergd4e46a32007-09-14 11:10:24 -0400580
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200581 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
Johannes Berge2ebc742007-07-27 15:43:22 +0200582 tx->key = NULL;
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200583 else if (tx->sta &&
584 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400585 tx->key = key;
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200586 else if (ieee80211_is_mgmt(hdr->frame_control) &&
Jouni Malinenecbcd322010-03-29 23:35:23 -0700587 is_multicast_ether_addr(hdr->addr1) &&
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100588 ieee80211_is_robust_mgmt_frame(tx->skb) &&
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200589 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
590 tx->key = key;
Johannes Bergf7e01042010-12-09 19:49:02 +0100591 else if (is_multicast_ether_addr(hdr->addr1) &&
592 (key = rcu_dereference(tx->sdata->default_multicast_key)))
593 tx->key = key;
594 else if (!is_multicast_ether_addr(hdr->addr1) &&
595 (key = rcu_dereference(tx->sdata->default_unicast_key)))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400596 tx->key = key;
Johannes Berg46e6de12012-07-04 18:10:07 +0200597 else if (info->flags & IEEE80211_TX_CTL_INJECTED)
598 tx->key = NULL;
599 else if (!tx->sdata->drop_unencrypted)
600 tx->key = NULL;
601 else if (tx->skb->protocol == tx->sdata->control_port_protocol)
602 tx->key = NULL;
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100603 else if (ieee80211_is_robust_mgmt_frame(tx->skb) &&
Johannes Berg46e6de12012-07-04 18:10:07 +0200604 !(ieee80211_is_action(hdr->frame_control) &&
605 tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP)))
606 tx->key = NULL;
Nicolas Cavallari4922f712012-07-04 18:10:08 +0200607 else if (ieee80211_is_mgmt(hdr->frame_control) &&
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100608 !ieee80211_is_robust_mgmt_frame(tx->skb))
Nicolas Cavallari4922f712012-07-04 18:10:08 +0200609 tx->key = NULL;
Johannes Berg46e6de12012-07-04 18:10:07 +0200610 else {
Johannes Berge2ebc742007-07-27 15:43:22 +0200611 I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
Johannes Berg9ae54c82008-01-31 19:48:20 +0100612 return TX_DROP;
Johannes Berg46e6de12012-07-04 18:10:07 +0200613 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200614
615 if (tx->key) {
Johannes Berg813d7662010-01-17 01:47:58 +0100616 bool skip_hw = false;
617
Johannes Berge2ebc742007-07-27 15:43:22 +0200618 tx->key->tx_rx_count++;
Johannes Berg011bfcc2007-09-17 01:29:25 -0400619 /* TODO: add threshold stuff again */
Johannes Berg176e4f82007-12-18 15:27:47 +0100620
Johannes Berg97359d12010-08-10 09:46:38 +0200621 switch (tx->key->conf.cipher) {
622 case WLAN_CIPHER_SUITE_WEP40:
623 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berg97359d12010-08-10 09:46:38 +0200624 case WLAN_CIPHER_SUITE_TKIP:
Harvey Harrison358c8d92008-07-15 18:44:13 -0700625 if (!ieee80211_is_data_present(hdr->frame_control))
Johannes Berg176e4f82007-12-18 15:27:47 +0100626 tx->key = NULL;
627 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200628 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinenfb733332009-01-08 13:32:00 +0200629 if (!ieee80211_is_data_present(hdr->frame_control) &&
630 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
631 tx->skb))
632 tx->key = NULL;
Kalle Valo3b43a182010-01-23 20:27:14 +0200633 else
634 skip_hw = (tx->key->conf.flags &
Johannes Berge548c492012-09-04 17:08:23 +0200635 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
Kalle Valo3b43a182010-01-23 20:27:14 +0200636 ieee80211_is_mgmt(hdr->frame_control);
Jouni Malinenfb733332009-01-08 13:32:00 +0200637 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200638 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200639 if (!ieee80211_is_mgmt(hdr->frame_control))
640 tx->key = NULL;
641 break;
Johannes Berg176e4f82007-12-18 15:27:47 +0100642 }
Johannes Berg813d7662010-01-17 01:47:58 +0100643
Johannes Berge54faf22013-01-29 11:41:38 +0100644 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
645 !ieee80211_is_deauth(hdr->frame_control)))
Johannes Berg95acac62011-07-12 12:30:59 +0200646 return TX_DROP;
647
Johannes Bergf12553e2010-01-22 22:07:59 +0100648 if (!skip_hw && tx->key &&
Johannes Berg382b1652010-01-25 11:36:16 +0100649 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
Johannes Berg813d7662010-01-17 01:47:58 +0100650 info->control.hw_key = &tx->key->conf;
Johannes Berge2ebc742007-07-27 15:43:22 +0200651 }
652
Johannes Berg9ae54c82008-01-31 19:48:20 +0100653 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200654}
655
Johannes Bergd9e8a702008-06-30 15:10:44 +0200656static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100657ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200658{
Johannes Berge039fa42008-05-15 12:55:29 +0200659 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200660 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
661 struct ieee80211_supported_band *sband;
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700662 u32 len;
Johannes Berge6a98542008-10-21 12:40:02 +0200663 struct ieee80211_tx_rate_control txrc;
Felix Fietkau0d528d82013-04-22 16:14:41 +0200664 struct ieee80211_sta_rates *ratetbl = NULL;
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200665 bool assoc = false;
Johannes Berge6a98542008-10-21 12:40:02 +0200666
667 memset(&txrc, 0, sizeof(txrc));
Johannes Berg8318d782008-01-24 19:38:38 +0100668
Johannes Berg2d565772012-07-23 15:12:51 +0200669 sband = tx->local->hw.wiphy->bands[info->band];
Johannes Berge2ebc742007-07-27 15:43:22 +0200670
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700671 len = min_t(u32, tx->skb->len + FCS_LEN,
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200672 tx->local->hw.wiphy->frag_threshold);
Johannes Berg58d41852007-09-26 17:53:18 +0200673
Johannes Berge6a98542008-10-21 12:40:02 +0200674 /* set up the tx rate control struct we give the RC algo */
Johannes Berg005e4722012-02-26 11:24:35 +0100675 txrc.hw = &tx->local->hw;
Johannes Berge6a98542008-10-21 12:40:02 +0200676 txrc.sband = sband;
677 txrc.bss_conf = &tx->sdata->vif.bss_conf;
678 txrc.skb = tx->skb;
679 txrc.reported_rate.idx = -1;
Johannes Berg2d565772012-07-23 15:12:51 +0200680 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
Jouni Malinen37eb0b12010-01-06 13:09:08 +0200681 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
682 txrc.max_rate_idx = -1;
683 else
684 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
Felix Fietkau2ffbe6d2013-04-16 13:38:42 +0200685
686 if (tx->sdata->rc_has_mcs_mask[info->band])
687 txrc.rate_idx_mcs_mask =
688 tx->sdata->rc_rateidx_mcs_mask[info->band];
689
Felix Fietkau8f0729b2010-11-11 15:07:23 +0100690 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
Chun-Yeow Yeoh4bb62342011-11-24 17:15:20 -0800691 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
Felix Fietkau8f0729b2010-11-11 15:07:23 +0100692 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC);
Johannes Berg58d41852007-09-26 17:53:18 +0200693
Johannes Berge6a98542008-10-21 12:40:02 +0200694 /* set up RTS protection if desired */
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200695 if (len > tx->local->hw.wiphy->rts_threshold) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200696 txrc.rts = true;
Johannes Berge2ebc742007-07-27 15:43:22 +0200697 }
Johannes Berge6a98542008-10-21 12:40:02 +0200698
Felix Fietkau0d528d82013-04-22 16:14:41 +0200699 info->control.use_rts = txrc.rts;
Felix Fietkau991fec02013-04-16 13:38:43 +0200700 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
701
Johannes Berge6a98542008-10-21 12:40:02 +0200702 /*
703 * Use short preamble if the BSS can handle it, but not for
704 * management frames unless we know the receiver can handle
705 * that -- the management frame might be to a station that
706 * just wants a probe response.
707 */
708 if (tx->sdata->vif.bss_conf.use_short_preamble &&
709 (ieee80211_is_data(hdr->frame_control) ||
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200710 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
Felix Fietkau0d528d82013-04-22 16:14:41 +0200711 txrc.short_preamble = true;
712
713 info->control.short_preamble = txrc.short_preamble;
Johannes Berge6a98542008-10-21 12:40:02 +0200714
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200715 if (tx->sta)
716 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge6a98542008-10-21 12:40:02 +0200717
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700718 /*
719 * Lets not bother rate control if we're associated and cannot
720 * talk to the sta. This should not happen.
721 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200722 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700723 !rate_usable_index_exists(sband, &tx->sta->sta),
724 "%s: Dropped data frame as no usable bitrate found while "
725 "scanning and associated. Target station: "
726 "%pM on %d GHz band\n",
Johannes Berg47846c92009-11-25 17:46:19 +0100727 tx->sdata->name, hdr->addr1,
Johannes Berg2d565772012-07-23 15:12:51 +0200728 info->band ? 5 : 2))
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700729 return TX_DROP;
730
731 /*
732 * If we're associated with the sta at this point we know we can at
733 * least send the frame at the lowest bit rate.
734 */
Johannes Berge6a98542008-10-21 12:40:02 +0200735 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
736
Felix Fietkau0d528d82013-04-22 16:14:41 +0200737 if (tx->sta && !info->control.skip_table)
738 ratetbl = rcu_dereference(tx->sta->sta.rates);
739
740 if (unlikely(info->control.rates[0].idx < 0)) {
741 if (ratetbl) {
742 struct ieee80211_tx_rate rate = {
743 .idx = ratetbl->rate[0].idx,
744 .flags = ratetbl->rate[0].flags,
745 .count = ratetbl->rate[0].count
746 };
747
748 if (ratetbl->rate[0].idx < 0)
749 return TX_DROP;
750
751 tx->rate = rate;
752 } else {
753 return TX_DROP;
754 }
755 } else {
756 tx->rate = info->control.rates[0];
757 }
Johannes Berge6a98542008-10-21 12:40:02 +0200758
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100759 if (txrc.reported_rate.idx < 0) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200760 txrc.reported_rate = tx->rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100761 if (tx->sta && ieee80211_is_data(hdr->frame_control))
762 tx->sta->last_tx_rate = txrc.reported_rate;
763 } else if (tx->sta)
Johannes Berge6a98542008-10-21 12:40:02 +0200764 tx->sta->last_tx_rate = txrc.reported_rate;
765
Felix Fietkau0d528d82013-04-22 16:14:41 +0200766 if (ratetbl)
767 return TX_CONTINUE;
768
Johannes Berge6a98542008-10-21 12:40:02 +0200769 if (unlikely(!info->control.rates[0].count))
770 info->control.rates[0].count = 1;
771
Gábor Stefanik99551512009-04-23 19:36:14 +0200772 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
773 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
774 info->control.rates[0].count = 1;
775
Johannes Berg9ae54c82008-01-31 19:48:20 +0100776 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200777}
778
Johannes Bergd9e8a702008-06-30 15:10:44 +0200779static ieee80211_tx_result debug_noinline
Johannes Bergf591fa52008-07-10 11:21:26 +0200780ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
781{
782 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
783 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
784 u16 *seq;
785 u8 *qc;
786 int tid;
787
Johannes Berg25d834e2008-09-12 22:52:47 +0200788 /*
789 * Packet injection may want to control the sequence
790 * number, if we have no matching interface then we
791 * neither assign one ourselves nor ask the driver to.
792 */
Johannes Berg5061b0c2009-07-14 00:33:34 +0200793 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
Johannes Berg25d834e2008-09-12 22:52:47 +0200794 return TX_CONTINUE;
795
Johannes Bergf591fa52008-07-10 11:21:26 +0200796 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
797 return TX_CONTINUE;
798
799 if (ieee80211_hdrlen(hdr->frame_control) < 24)
800 return TX_CONTINUE;
801
Johannes Berg49a59542011-09-29 16:04:41 +0200802 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
803 return TX_CONTINUE;
804
Johannes Berg94778282008-10-10 13:21:59 +0200805 /*
806 * Anything but QoS data that has a sequence number field
807 * (is long enough) gets a sequence number from the global
Bob Copelandc4c205f2013-08-23 09:35:38 -0400808 * counter. QoS data frames with a multicast destination
809 * also use the global counter (802.11-2012 9.3.2.10).
Johannes Berg94778282008-10-10 13:21:59 +0200810 */
Bob Copelandc4c205f2013-08-23 09:35:38 -0400811 if (!ieee80211_is_data_qos(hdr->frame_control) ||
812 is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg94778282008-10-10 13:21:59 +0200813 /* driver should assign sequence number */
Johannes Bergf591fa52008-07-10 11:21:26 +0200814 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
Johannes Berg94778282008-10-10 13:21:59 +0200815 /* for pure STA mode without beacons, we can do it */
816 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
817 tx->sdata->sequence_number += 0x10;
Johannes Bergf591fa52008-07-10 11:21:26 +0200818 return TX_CONTINUE;
819 }
820
821 /*
822 * This should be true for injected/management frames only, for
823 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
824 * above since they are not QoS-data frames.
825 */
826 if (!tx->sta)
827 return TX_CONTINUE;
828
829 /* include per-STA, per-TID sequence counter */
830
831 qc = ieee80211_get_qos_ctl(hdr);
832 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
833 seq = &tx->sta->tid_seq[tid];
834
835 hdr->seq_ctrl = cpu_to_le16(*seq);
836
837 /* Increase the sequence number. */
838 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
839
840 return TX_CONTINUE;
841}
842
Johannes Berg252b86c2011-11-16 15:28:55 +0100843static int ieee80211_fragment(struct ieee80211_tx_data *tx,
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100844 struct sk_buff *skb, int hdrlen,
845 int frag_threshold)
846{
Johannes Berg252b86c2011-11-16 15:28:55 +0100847 struct ieee80211_local *local = tx->local;
Johannes Berga1a3fce2011-11-16 15:28:56 +0100848 struct ieee80211_tx_info *info;
Johannes Berg252b86c2011-11-16 15:28:55 +0100849 struct sk_buff *tmp;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100850 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
851 int pos = hdrlen + per_fragm;
852 int rem = skb->len - hdrlen - per_fragm;
853
854 if (WARN_ON(rem < 0))
855 return -EINVAL;
856
Johannes Berg252b86c2011-11-16 15:28:55 +0100857 /* first fragment was already added to queue by caller */
858
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100859 while (rem) {
860 int fraglen = per_fragm;
861
862 if (fraglen > rem)
863 fraglen = rem;
864 rem -= fraglen;
865 tmp = dev_alloc_skb(local->tx_headroom +
866 frag_threshold +
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200867 tx->sdata->encrypt_headroom +
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100868 IEEE80211_ENCRYPT_TAILROOM);
869 if (!tmp)
870 return -ENOMEM;
Johannes Berg252b86c2011-11-16 15:28:55 +0100871
872 __skb_queue_tail(&tx->skbs, tmp);
873
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200874 skb_reserve(tmp,
875 local->tx_headroom + tx->sdata->encrypt_headroom);
876
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100877 /* copy control information */
878 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
Johannes Berga1a3fce2011-11-16 15:28:56 +0100879
880 info = IEEE80211_SKB_CB(tmp);
881 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
882 IEEE80211_TX_CTL_FIRST_FRAGMENT);
883
884 if (rem)
885 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
886
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100887 skb_copy_queue_mapping(tmp, skb);
888 tmp->priority = skb->priority;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100889 tmp->dev = skb->dev;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100890
891 /* copy header and data */
892 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
893 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
894
895 pos += fraglen;
896 }
897
Johannes Berg252b86c2011-11-16 15:28:55 +0100898 /* adjust first fragment's length */
Johannes Berg338f9772014-02-01 00:16:23 +0100899 skb_trim(skb, hdrlen + per_fragm);
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100900 return 0;
901}
902
Johannes Bergf591fa52008-07-10 11:21:26 +0200903static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +0200904ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
905{
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100906 struct sk_buff *skb = tx->skb;
907 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
908 struct ieee80211_hdr *hdr = (void *)skb->data;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200909 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100910 int hdrlen;
911 int fragnum;
Johannes Berge2454942008-05-15 12:55:28 +0200912
Johannes Berg252b86c2011-11-16 15:28:55 +0100913 /* no matter what happens, tx->skb moves to tx->skbs */
914 __skb_queue_tail(&tx->skbs, skb);
915 tx->skb = NULL;
916
Johannes Berga26eb272011-10-07 14:01:25 +0200917 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
918 return TX_CONTINUE;
919
920 if (tx->local->ops->set_frag_threshold)
Johannes Berge2454942008-05-15 12:55:28 +0200921 return TX_CONTINUE;
922
Johannes Bergeefce912008-05-17 00:57:13 +0200923 /*
924 * Warn when submitting a fragmented A-MPDU frame and drop it.
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200925 * This scenario is handled in ieee80211_tx_prepare but extra
Ron Rindjunsky8d5e0d52008-06-12 15:42:29 +0300926 * caution taken here as fragmented ampdu may cause Tx stop.
Johannes Bergeefce912008-05-17 00:57:13 +0200927 */
Sujith8b30b1f2008-10-24 09:55:27 +0530928 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
Johannes Bergeefce912008-05-17 00:57:13 +0200929 return TX_DROP;
930
Harvey Harrison065e96052008-06-22 16:45:27 -0700931 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berge2454942008-05-15 12:55:28 +0200932
Johannes Berga26eb272011-10-07 14:01:25 +0200933 /* internal error, why isn't DONTFRAG set? */
Johannes Berg8ccd8f22009-04-29 23:35:56 +0200934 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100935 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200936
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100937 /*
938 * Now fragment the frame. This will allocate all the fragments and
939 * chain them (using skb as the first fragment) to skb->next.
940 * During transmission, we will remove the successfully transmitted
941 * fragments from this list. When the low-level driver rejects one
942 * of the fragments then we will simply pretend to accept the skb
943 * but store it away as pending.
944 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100945 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100946 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200947
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100948 /* update duration/seq/flags of fragments */
949 fragnum = 0;
Johannes Berg252b86c2011-11-16 15:28:55 +0100950
951 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100952 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
Johannes Berge2454942008-05-15 12:55:28 +0200953
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100954 hdr = (void *)skb->data;
955 info = IEEE80211_SKB_CB(skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200956
Johannes Berg252b86c2011-11-16 15:28:55 +0100957 if (!skb_queue_is_last(&tx->skbs, skb)) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100958 hdr->frame_control |= morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200959 /*
960 * No multi-rate retries for fragmented frames, that
961 * would completely throw off the NAV at other STAs.
962 */
963 info->control.rates[1].idx = -1;
964 info->control.rates[2].idx = -1;
965 info->control.rates[3].idx = -1;
Thomas Huehne3e1a0b2012-07-02 19:46:16 +0200966 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
Johannes Berge6a98542008-10-21 12:40:02 +0200967 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100968 } else {
969 hdr->frame_control &= ~morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200970 }
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100971 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
972 fragnum++;
Johannes Berg252b86c2011-11-16 15:28:55 +0100973 }
Johannes Berge2454942008-05-15 12:55:28 +0200974
975 return TX_CONTINUE;
Johannes Berge2454942008-05-15 12:55:28 +0200976}
977
Johannes Bergd9e8a702008-06-30 15:10:44 +0200978static ieee80211_tx_result debug_noinline
Johannes Bergfeff1f22009-08-10 16:01:54 +0200979ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
980{
Johannes Berg252b86c2011-11-16 15:28:55 +0100981 struct sk_buff *skb;
Johannes Berg560d2682013-02-05 10:55:21 +0100982 int ac = -1;
Johannes Bergfeff1f22009-08-10 16:01:54 +0200983
984 if (!tx->sta)
985 return TX_CONTINUE;
986
Johannes Berg252b86c2011-11-16 15:28:55 +0100987 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg560d2682013-02-05 10:55:21 +0100988 ac = skb_get_queue_mapping(skb);
Johannes Bergfeff1f22009-08-10 16:01:54 +0200989 tx->sta->tx_fragments++;
Johannes Berg560d2682013-02-05 10:55:21 +0100990 tx->sta->tx_bytes[ac] += skb->len;
Johannes Berg252b86c2011-11-16 15:28:55 +0100991 }
Johannes Berg560d2682013-02-05 10:55:21 +0100992 if (ac >= 0)
993 tx->sta->tx_packets[ac]++;
Johannes Bergfeff1f22009-08-10 16:01:54 +0200994
995 return TX_CONTINUE;
996}
997
998static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +0200999ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1000{
1001 if (!tx->key)
1002 return TX_CONTINUE;
1003
Johannes Berg97359d12010-08-10 09:46:38 +02001004 switch (tx->key->conf.cipher) {
1005 case WLAN_CIPHER_SUITE_WEP40:
1006 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berge2454942008-05-15 12:55:28 +02001007 return ieee80211_crypto_wep_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001008 case WLAN_CIPHER_SUITE_TKIP:
Johannes Berge2454942008-05-15 12:55:28 +02001009 return ieee80211_crypto_tkip_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001010 case WLAN_CIPHER_SUITE_CCMP:
Johannes Berge2454942008-05-15 12:55:28 +02001011 return ieee80211_crypto_ccmp_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001012 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02001013 return ieee80211_crypto_aes_cmac_encrypt(tx);
Johannes Berg3ffc2a92010-08-27 14:26:52 +03001014 default:
Yoni Divinskyd32a1022012-01-16 15:18:59 +02001015 return ieee80211_crypto_hw_encrypt(tx);
Johannes Berge2454942008-05-15 12:55:28 +02001016 }
1017
Johannes Berge2454942008-05-15 12:55:28 +02001018 return TX_DROP;
1019}
1020
Johannes Bergd9e8a702008-06-30 15:10:44 +02001021static ieee80211_tx_result debug_noinline
Johannes Berg03f93c32008-06-25 14:36:27 +03001022ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1023{
Johannes Berg252b86c2011-11-16 15:28:55 +01001024 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001025 struct ieee80211_hdr *hdr;
1026 int next_len;
1027 bool group_addr;
Johannes Berg03f93c32008-06-25 14:36:27 +03001028
Johannes Berg252b86c2011-11-16 15:28:55 +01001029 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001030 hdr = (void *) skb->data;
Jouni Malinen7e0aae42009-05-19 19:25:58 +03001031 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1032 break; /* must not overwrite AID */
Johannes Berg252b86c2011-11-16 15:28:55 +01001033 if (!skb_queue_is_last(&tx->skbs, skb)) {
1034 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1035 next_len = next->len;
1036 } else
1037 next_len = 0;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001038 group_addr = is_multicast_ether_addr(hdr->addr1);
Johannes Berg03f93c32008-06-25 14:36:27 +03001039
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001040 hdr->duration_id =
Johannes Berg252b86c2011-11-16 15:28:55 +01001041 ieee80211_duration(tx, skb, group_addr, next_len);
1042 }
Johannes Berg03f93c32008-06-25 14:36:27 +03001043
1044 return TX_CONTINUE;
1045}
1046
Johannes Berge2ebc742007-07-27 15:43:22 +02001047/* actual transmit path */
1048
Johannes Berga622ab72010-06-10 10:21:39 +02001049static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1050 struct sk_buff *skb,
1051 struct ieee80211_tx_info *info,
1052 struct tid_ampdu_tx *tid_tx,
1053 int tid)
1054{
1055 bool queued = false;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001056 bool reset_agg_timer = false;
Helmut Schaaaa454582012-03-07 17:20:30 +01001057 struct sk_buff *purge_skb = NULL;
Johannes Berga622ab72010-06-10 10:21:39 +02001058
1059 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1060 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001061 reset_agg_timer = true;
Johannes Berg0ab33702010-06-10 10:21:42 +02001062 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1063 /*
1064 * nothing -- this aggregation session is being started
1065 * but that might still fail with the driver
1066 */
Johannes Berga622ab72010-06-10 10:21:39 +02001067 } else {
1068 spin_lock(&tx->sta->lock);
1069 /*
1070 * Need to re-check now, because we may get here
1071 *
1072 * 1) in the window during which the setup is actually
1073 * already done, but not marked yet because not all
1074 * packets are spliced over to the driver pending
1075 * queue yet -- if this happened we acquire the lock
1076 * either before or after the splice happens, but
1077 * need to recheck which of these cases happened.
1078 *
1079 * 2) during session teardown, if the OPERATIONAL bit
1080 * was cleared due to the teardown but the pointer
1081 * hasn't been assigned NULL yet (or we loaded it
1082 * before it was assigned) -- in this case it may
1083 * now be NULL which means we should just let the
1084 * packet pass through because splicing the frames
1085 * back is already done.
1086 */
Johannes Berg40b275b2011-05-13 14:15:49 +02001087 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
Johannes Berga622ab72010-06-10 10:21:39 +02001088
1089 if (!tid_tx) {
1090 /* do nothing, let packet pass through */
1091 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1092 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001093 reset_agg_timer = true;
Johannes Berga622ab72010-06-10 10:21:39 +02001094 } else {
1095 queued = true;
1096 info->control.vif = &tx->sdata->vif;
1097 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Johannes Berg03c8c062014-01-09 01:45:28 +01001098 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berga622ab72010-06-10 10:21:39 +02001099 __skb_queue_tail(&tid_tx->pending, skb);
Helmut Schaaaa454582012-03-07 17:20:30 +01001100 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1101 purge_skb = __skb_dequeue(&tid_tx->pending);
Johannes Berga622ab72010-06-10 10:21:39 +02001102 }
1103 spin_unlock(&tx->sta->lock);
Helmut Schaaaa454582012-03-07 17:20:30 +01001104
1105 if (purge_skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001106 ieee80211_free_txskb(&tx->local->hw, purge_skb);
Johannes Berga622ab72010-06-10 10:21:39 +02001107 }
1108
Nikolay Martynov285fa692011-11-22 21:50:28 -05001109 /* reset session timer */
1110 if (reset_agg_timer && tid_tx->timeout)
Felix Fietkau12d3952f2012-03-18 22:58:06 +01001111 tid_tx->last_tx = jiffies;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001112
Johannes Berga622ab72010-06-10 10:21:39 +02001113 return queued;
1114}
1115
Johannes Berg58d41852007-09-26 17:53:18 +02001116/*
1117 * initialises @tx
1118 */
Johannes Berg9ae54c82008-01-31 19:48:20 +01001119static ieee80211_tx_result
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001120ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1121 struct ieee80211_tx_data *tx,
1122 struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001123{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001124 struct ieee80211_local *local = sdata->local;
Johannes Berg58d41852007-09-26 17:53:18 +02001125 struct ieee80211_hdr *hdr;
Johannes Berge039fa42008-05-15 12:55:29 +02001126 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg68f2b512011-10-07 14:01:24 +02001127 int tid;
Johannes Berga622ab72010-06-10 10:21:39 +02001128 u8 *qc;
Johannes Berge2ebc742007-07-27 15:43:22 +02001129
1130 memset(tx, 0, sizeof(*tx));
1131 tx->skb = skb;
Johannes Berge2ebc742007-07-27 15:43:22 +02001132 tx->local = local;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001133 tx->sdata = sdata;
Johannes Berg252b86c2011-11-16 15:28:55 +01001134 __skb_queue_head_init(&tx->skbs);
Johannes Berge2ebc742007-07-27 15:43:22 +02001135
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001136 /*
1137 * If this flag is set to true anywhere, and we get here,
1138 * we are doing the needed processing, so remove the flag
1139 * now.
1140 */
1141 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1142
Johannes Berg58d41852007-09-26 17:53:18 +02001143 hdr = (struct ieee80211_hdr *) skb->data;
1144
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001145 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001146 tx->sta = rcu_dereference(sdata->u.vlan.sta);
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001147 if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
1148 return TX_DROP;
Felix Fietkau03bb7f42013-09-29 21:39:33 +02001149 } else if (info->flags & (IEEE80211_TX_CTL_INJECTED |
1150 IEEE80211_TX_INTFL_NL80211_FRAME_TX) ||
Felix Fietkau66f2c992012-04-29 15:44:16 +02001151 tx->sdata->control_port_protocol == tx->skb->protocol) {
Felix Fietkaub4d57ad2010-01-31 23:25:24 +01001152 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001153 }
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001154 if (!tx->sta)
Johannes Bergabe60632009-11-25 17:46:18 +01001155 tx->sta = sta_info_get(sdata, hdr->addr1);
Johannes Berg58d41852007-09-26 17:53:18 +02001156
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001157 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
Johannes Berg49a59542011-09-29 16:04:41 +02001158 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
Arik Nemtsovedf6b782011-08-30 09:32:38 +03001159 (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) &&
1160 !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) {
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001161 struct tid_ampdu_tx *tid_tx;
1162
Sujith8b30b1f2008-10-24 09:55:27 +05301163 qc = ieee80211_get_qos_ctl(hdr);
1164 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1165
Johannes Berga622ab72010-06-10 10:21:39 +02001166 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1167 if (tid_tx) {
1168 bool queued;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001169
Johannes Berga622ab72010-06-10 10:21:39 +02001170 queued = ieee80211_tx_prep_agg(tx, skb, info,
1171 tid_tx, tid);
1172
1173 if (unlikely(queued))
1174 return TX_QUEUED;
1175 }
Sujith8b30b1f2008-10-24 09:55:27 +05301176 }
1177
Jiri Slabybadffb72007-08-28 17:01:54 -04001178 if (is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg5cf121c2008-02-25 16:27:43 +01001179 tx->flags &= ~IEEE80211_TX_UNICAST;
Johannes Berge039fa42008-05-15 12:55:29 +02001180 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Simon Wunderlich6fd67e92011-11-18 14:20:42 +01001181 } else
Johannes Berg5cf121c2008-02-25 16:27:43 +01001182 tx->flags |= IEEE80211_TX_UNICAST;
Johannes Berg58d41852007-09-26 17:53:18 +02001183
Johannes Berga26eb272011-10-07 14:01:25 +02001184 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1185 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1186 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1187 info->flags & IEEE80211_TX_CTL_AMPDU)
1188 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
Johannes Berg58d41852007-09-26 17:53:18 +02001189 }
1190
Johannes Berge2ebc742007-07-27 15:43:22 +02001191 if (!tx->sta)
Johannes Berge039fa42008-05-15 12:55:29 +02001192 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001193 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
Johannes Berge039fa42008-05-15 12:55:29 +02001194 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Johannes Berg58d41852007-09-26 17:53:18 +02001195
Johannes Berge039fa42008-05-15 12:55:29 +02001196 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge2ebc742007-07-27 15:43:22 +02001197
Johannes Berg9ae54c82008-01-31 19:48:20 +01001198 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +02001199}
1200
Johannes Berg11127e92011-11-16 16:02:47 +01001201static bool ieee80211_tx_frags(struct ieee80211_local *local,
1202 struct ieee80211_vif *vif,
1203 struct ieee80211_sta *sta,
1204 struct sk_buff_head *skbs,
1205 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001206{
Thomas Huehn36323f82012-07-23 21:33:42 +02001207 struct ieee80211_tx_control control;
Johannes Berg252b86c2011-11-16 15:28:55 +01001208 struct sk_buff *skb, *tmp;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001209 unsigned long flags;
Johannes Berge2ebc742007-07-27 15:43:22 +02001210
Johannes Berg252b86c2011-11-16 15:28:55 +01001211 skb_queue_walk_safe(skbs, skb, tmp) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001212 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1213 int q = info->hw_queue;
1214
1215#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1216 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1217 __skb_unlink(skb, skbs);
Felix Fietkauc3e77242012-10-08 14:39:33 +02001218 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001219 continue;
1220 }
1221#endif
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001222
1223 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001224 if (local->queue_stop_reasons[q] ||
Johannes Berg7bb45682011-02-24 14:42:06 +01001225 (!txpending && !skb_queue_empty(&local->pending[q]))) {
Seth Forshee6c17b772013-02-11 11:21:07 -06001226 if (unlikely(info->flags &
Seth Forsheea7679ed2013-02-25 14:58:05 -06001227 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1228 if (local->queue_stop_reasons[q] &
1229 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1230 /*
1231 * Drop off-channel frames if queues
1232 * are stopped for any reason other
1233 * than off-channel operation. Never
1234 * queue them.
1235 */
1236 spin_unlock_irqrestore(
1237 &local->queue_stop_reason_lock,
1238 flags);
1239 ieee80211_purge_tx_queue(&local->hw,
1240 skbs);
1241 return true;
1242 }
1243 } else {
1244
Seth Forshee6c17b772013-02-11 11:21:07 -06001245 /*
Seth Forsheea7679ed2013-02-25 14:58:05 -06001246 * Since queue is stopped, queue up frames for
1247 * later transmission from the tx-pending
1248 * tasklet when the queue is woken again.
Seth Forshee6c17b772013-02-11 11:21:07 -06001249 */
Seth Forsheea7679ed2013-02-25 14:58:05 -06001250 if (txpending)
1251 skb_queue_splice_init(skbs,
1252 &local->pending[q]);
1253 else
1254 skb_queue_splice_tail_init(skbs,
1255 &local->pending[q]);
1256
1257 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1258 flags);
1259 return false;
Seth Forshee6c17b772013-02-11 11:21:07 -06001260 }
Johannes Berg7bb45682011-02-24 14:42:06 +01001261 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001262 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Tomas Winklerf8e79dd2008-07-24 18:46:44 +03001263
Johannes Berg11127e92011-11-16 16:02:47 +01001264 info->control.vif = vif;
Thomas Huehn36323f82012-07-23 21:33:42 +02001265 control.sta = sta;
Johannes Bergec25acc2010-07-22 17:11:28 +02001266
Johannes Berg252b86c2011-11-16 15:28:55 +01001267 __skb_unlink(skb, skbs);
Thomas Huehn36323f82012-07-23 21:33:42 +02001268 drv_tx(local, &control, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001269 }
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001270
Johannes Berg11127e92011-11-16 16:02:47 +01001271 return true;
1272}
1273
1274/*
1275 * Returns false if the frame couldn't be transmitted but was queued instead.
1276 */
1277static bool __ieee80211_tx(struct ieee80211_local *local,
1278 struct sk_buff_head *skbs, int led_len,
1279 struct sta_info *sta, bool txpending)
1280{
1281 struct ieee80211_tx_info *info;
1282 struct ieee80211_sub_if_data *sdata;
1283 struct ieee80211_vif *vif;
1284 struct ieee80211_sta *pubsta;
1285 struct sk_buff *skb;
1286 bool result = true;
1287 __le16 fc;
1288
1289 if (WARN_ON(skb_queue_empty(skbs)))
1290 return true;
1291
1292 skb = skb_peek(skbs);
1293 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1294 info = IEEE80211_SKB_CB(skb);
1295 sdata = vif_to_sdata(info->control.vif);
1296 if (sta && !sta->uploaded)
1297 sta = NULL;
1298
1299 if (sta)
1300 pubsta = &sta->sta;
1301 else
1302 pubsta = NULL;
1303
1304 switch (sdata->vif.type) {
1305 case NL80211_IFTYPE_MONITOR:
Johannes Bergc82b5a72013-07-14 23:39:20 +03001306 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
1307 vif = &sdata->vif;
1308 break;
1309 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001310 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001311 if (sdata) {
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001312 vif = &sdata->vif;
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001313 info->hw_queue =
1314 vif->hw_queue[skb_get_queue_mapping(skb)];
1315 } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
1316 dev_kfree_skb(skb);
1317 return true;
1318 } else
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001319 vif = NULL;
Johannes Berg11127e92011-11-16 16:02:47 +01001320 break;
1321 case NL80211_IFTYPE_AP_VLAN:
1322 sdata = container_of(sdata->bss,
1323 struct ieee80211_sub_if_data, u.ap);
1324 /* fall through */
1325 default:
1326 vif = &sdata->vif;
1327 break;
1328 }
1329
Johannes Bergcb831b52012-07-02 15:40:18 +02001330 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1331 txpending);
Johannes Berg11127e92011-11-16 16:02:47 +01001332
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001333 ieee80211_tpt_led_trig_tx(local, fc, led_len);
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001334
Johannes Berg4db4e0a2011-11-24 14:47:36 +01001335 WARN_ON_ONCE(!skb_queue_empty(skbs));
Johannes Berg252b86c2011-11-16 15:28:55 +01001336
Johannes Berg11127e92011-11-16 16:02:47 +01001337 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001338}
1339
Johannes Berg97b045d2008-06-20 01:22:30 +02001340/*
1341 * Invoke TX handlers, return 0 on success and non-zero if the
1342 * frame was dropped or queued.
1343 */
1344static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1345{
Johannes Berg252b86c2011-11-16 15:28:55 +01001346 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg97b045d2008-06-20 01:22:30 +02001347 ieee80211_tx_result res = TX_DROP;
Johannes Berg97b045d2008-06-20 01:22:30 +02001348
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001349#define CALL_TXH(txh) \
1350 do { \
1351 res = txh(tx); \
1352 if (res != TX_CONTINUE) \
1353 goto txh_done; \
1354 } while (0)
Johannes Berg97b045d2008-06-20 01:22:30 +02001355
Kalle Valo5c1b98a2010-01-12 10:42:46 +02001356 CALL_TXH(ieee80211_tx_h_dynamic_ps);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001357 CALL_TXH(ieee80211_tx_h_check_assoc);
1358 CALL_TXH(ieee80211_tx_h_ps_buf);
Johannes Berga621fa42010-08-27 14:26:54 +03001359 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001360 CALL_TXH(ieee80211_tx_h_select_key);
Johannes Bergaf65cd962009-11-17 18:18:36 +01001361 if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
1362 CALL_TXH(ieee80211_tx_h_rate_ctrl);
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001363
Johannes Bergaa5b5492011-12-02 22:08:52 +01001364 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1365 __skb_queue_tail(&tx->skbs, tx->skb);
1366 tx->skb = NULL;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001367 goto txh_done;
Johannes Bergaa5b5492011-12-02 22:08:52 +01001368 }
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001369
1370 CALL_TXH(ieee80211_tx_h_michael_mic_add);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001371 CALL_TXH(ieee80211_tx_h_sequence);
1372 CALL_TXH(ieee80211_tx_h_fragment);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001373 /* handlers after fragment must be aware of tx info fragmentation! */
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001374 CALL_TXH(ieee80211_tx_h_stats);
1375 CALL_TXH(ieee80211_tx_h_encrypt);
Arik Nemtsov8fd369e2011-01-31 22:29:12 +02001376 if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
1377 CALL_TXH(ieee80211_tx_h_calculate_duration);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001378#undef CALL_TXH
1379
1380 txh_done:
Johannes Berg97b045d2008-06-20 01:22:30 +02001381 if (unlikely(res == TX_DROP)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001382 I802_DEBUG_INC(tx->local->tx_handlers_drop);
Johannes Berg252b86c2011-11-16 15:28:55 +01001383 if (tx->skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001384 ieee80211_free_txskb(&tx->local->hw, tx->skb);
Johannes Berg252b86c2011-11-16 15:28:55 +01001385 else
Felix Fietkau1f98ab72012-11-10 03:44:14 +01001386 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
Johannes Berg97b045d2008-06-20 01:22:30 +02001387 return -1;
1388 } else if (unlikely(res == TX_QUEUED)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001389 I802_DEBUG_INC(tx->local->tx_handlers_queued);
Johannes Berg97b045d2008-06-20 01:22:30 +02001390 return -1;
1391 }
1392
1393 return 0;
1394}
1395
Felix Fietkau06be6b12013-10-14 18:01:00 +02001396bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1397 struct ieee80211_vif *vif, struct sk_buff *skb,
1398 int band, struct ieee80211_sta **sta)
1399{
1400 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1402 struct ieee80211_tx_data tx;
1403
1404 if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP)
1405 return false;
1406
1407 info->band = band;
1408 info->control.vif = vif;
1409 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1410
1411 if (invoke_tx_handlers(&tx))
1412 return false;
1413
1414 if (sta) {
1415 if (tx.sta)
1416 *sta = &tx.sta->sta;
1417 else
1418 *sta = NULL;
1419 }
1420
1421 return true;
1422}
1423EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1424
Johannes Berg7bb45682011-02-24 14:42:06 +01001425/*
1426 * Returns false if the frame couldn't be transmitted but was queued instead.
1427 */
1428static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
Johannes Berg73c4e192014-11-09 18:50:09 +02001429 struct sk_buff *skb, bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001430{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001431 struct ieee80211_local *local = sdata->local;
Johannes Berg5cf121c2008-02-25 16:27:43 +01001432 struct ieee80211_tx_data tx;
Johannes Berg97b045d2008-06-20 01:22:30 +02001433 ieee80211_tx_result res_prepare;
Johannes Berge039fa42008-05-15 12:55:29 +02001434 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001435 bool result = true;
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001436 int led_len;
Johannes Berge2ebc742007-07-27 15:43:22 +02001437
Johannes Berge2ebc742007-07-27 15:43:22 +02001438 if (unlikely(skb->len < 10)) {
1439 dev_kfree_skb(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001440 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001441 }
1442
Johannes Berg58d41852007-09-26 17:53:18 +02001443 /* initialises tx */
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001444 led_len = skb->len;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001445 res_prepare = ieee80211_tx_prepare(sdata, &tx, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001446
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001447 if (unlikely(res_prepare == TX_DROP)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001448 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg55de9082012-07-26 17:24:39 +02001449 return true;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001450 } else if (unlikely(res_prepare == TX_QUEUED)) {
Johannes Berg55de9082012-07-26 17:24:39 +02001451 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001452 }
1453
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001454 /* set up hw_queue value early */
1455 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1456 !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
1457 info->hw_queue =
1458 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1459
Johannes Berg7bb45682011-02-24 14:42:06 +01001460 if (!invoke_tx_handlers(&tx))
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001461 result = __ieee80211_tx(local, &tx.skbs, led_len,
1462 tx.sta, txpending);
Johannes Berg55de9082012-07-26 17:24:39 +02001463
Johannes Berg7bb45682011-02-24 14:42:06 +01001464 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001465}
1466
1467/* device xmit handlers */
1468
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301469static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
Johannes Berg23c07522008-05-29 10:38:53 +02001470 struct sk_buff *skb,
1471 int head_need, bool may_encrypt)
1472{
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301473 struct ieee80211_local *local = sdata->local;
Johannes Berg23c07522008-05-29 10:38:53 +02001474 int tail_need = 0;
1475
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301476 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
Johannes Berg23c07522008-05-29 10:38:53 +02001477 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1478 tail_need -= skb_tailroom(skb);
1479 tail_need = max_t(int, tail_need, 0);
1480 }
1481
Ido Yarivc70f59a2014-07-29 15:39:14 +03001482 if (skb_cloned(skb) &&
1483 (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CLONED_SKBS) ||
1484 !skb_clone_writable(skb, ETH_HLEN) ||
1485 sdata->crypto_tx_tailroom_needed_cnt))
Johannes Berg23c07522008-05-29 10:38:53 +02001486 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001487 else if (head_need || tail_need)
Johannes Berg23c07522008-05-29 10:38:53 +02001488 I802_DEBUG_INC(local->tx_expand_skb_head);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001489 else
1490 return 0;
Johannes Berg23c07522008-05-29 10:38:53 +02001491
1492 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001493 wiphy_debug(local->hw.wiphy,
1494 "failed to reallocate TX buffer\n");
Johannes Berg23c07522008-05-29 10:38:53 +02001495 return -ENOMEM;
1496 }
1497
Johannes Berg23c07522008-05-29 10:38:53 +02001498 return 0;
1499}
1500
Johannes Berg73c4e192014-11-09 18:50:09 +02001501void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001502{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001503 struct ieee80211_local *local = sdata->local;
Johannes Berge039fa42008-05-15 12:55:29 +02001504 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02001505 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berge2ebc742007-07-27 15:43:22 +02001506 int headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001507 bool may_encrypt;
Johannes Berge2ebc742007-07-27 15:43:22 +02001508
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001509 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
Johannes Berg23c07522008-05-29 10:38:53 +02001510
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001511 headroom = local->tx_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001512 if (may_encrypt)
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001513 headroom += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001514 headroom -= skb_headroom(skb);
1515 headroom = max_t(int, 0, headroom);
1516
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301517 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001518 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001519 return;
Johannes Berge2ebc742007-07-27 15:43:22 +02001520 }
1521
Steve deRosier740c1aa2010-09-11 20:01:31 -07001522 hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berg5061b0c2009-07-14 00:33:34 +02001523 info->control.vif = &sdata->vif;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001524
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001525 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1526 if (ieee80211_is_data(hdr->frame_control) &&
1527 is_unicast_ether_addr(hdr->addr1)) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01001528 if (mesh_nexthop_resolve(sdata, skb))
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001529 return; /* skb queued: don't free */
1530 } else {
1531 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1532 }
Johannes Berg98aed9f2012-03-27 14:18:36 +02001533 }
Javier Cardonacca89492009-08-10 17:29:29 -07001534
Javier Cardona2154c812011-09-07 17:49:53 -07001535 ieee80211_set_qos_hdr(sdata, skb);
Johannes Berg73c4e192014-11-09 18:50:09 +02001536 ieee80211_tx(sdata, skb, false);
Johannes Berge2ebc742007-07-27 15:43:22 +02001537}
1538
Johannes Berg73b9f032011-10-07 14:01:26 +02001539static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb)
1540{
1541 struct ieee80211_radiotap_iterator iterator;
1542 struct ieee80211_radiotap_header *rthdr =
1543 (struct ieee80211_radiotap_header *) skb->data;
1544 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1545 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1546 NULL);
1547 u16 txflags;
1548
1549 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1550 IEEE80211_TX_CTL_DONTFRAG;
1551
1552 /*
1553 * for every radiotap entry that is present
1554 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1555 * entries present, or -EINVAL on error)
1556 */
1557
1558 while (!ret) {
1559 ret = ieee80211_radiotap_iterator_next(&iterator);
1560
1561 if (ret)
1562 continue;
1563
1564 /* see if this argument is something we can use */
1565 switch (iterator.this_arg_index) {
1566 /*
1567 * You must take care when dereferencing iterator.this_arg
1568 * for multibyte types... the pointer is not aligned. Use
1569 * get_unaligned((type *)iterator.this_arg) to dereference
1570 * iterator.this_arg for type "type" safely on all arches.
1571 */
1572 case IEEE80211_RADIOTAP_FLAGS:
1573 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1574 /*
1575 * this indicates that the skb we have been
1576 * handed has the 32-bit FCS CRC at the end...
1577 * we should react to that by snipping it off
1578 * because it will be recomputed and added
1579 * on transmission
1580 */
1581 if (skb->len < (iterator._max_length + FCS_LEN))
1582 return false;
1583
1584 skb_trim(skb, skb->len - FCS_LEN);
1585 }
1586 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1587 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1588 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1589 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1590 break;
1591
1592 case IEEE80211_RADIOTAP_TX_FLAGS:
1593 txflags = get_unaligned_le16(iterator.this_arg);
1594 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1595 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1596 break;
1597
1598 /*
1599 * Please update the file
1600 * Documentation/networking/mac80211-injection.txt
1601 * when parsing new fields here.
1602 */
1603
1604 default:
1605 break;
1606 }
1607 }
1608
1609 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
1610 return false;
1611
1612 /*
1613 * remove the radiotap header
1614 * iterator->_max_length was sanity-checked against
1615 * skb->len by iterator init
1616 */
1617 skb_pull(skb, iterator._max_length);
1618
1619 return true;
1620}
1621
Stephen Hemmingerd0cf9c02009-08-31 19:50:57 +00001622netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1623 struct net_device *dev)
Johannes Berge2ebc742007-07-27 15:43:22 +02001624{
1625 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Johannes Berg55de9082012-07-26 17:24:39 +02001626 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02001627 struct ieee80211_radiotap_header *prthdr =
1628 (struct ieee80211_radiotap_header *)skb->data;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001629 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02001630 struct ieee80211_hdr *hdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001631 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001632 struct cfg80211_chan_def *chandef;
Andy Green9b8a74e2007-07-27 15:43:24 +02001633 u16 len_rthdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001634 int hdrlen;
Johannes Berge2ebc742007-07-27 15:43:22 +02001635
Andy Green9b8a74e2007-07-27 15:43:24 +02001636 /* check for not even having the fixed radiotap header part */
1637 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
1638 goto fail; /* too short to be possibly valid */
1639
1640 /* is it a header version we can trust to find length from? */
1641 if (unlikely(prthdr->it_version))
1642 goto fail; /* only version 0 is supported */
1643
1644 /* then there must be a radiotap header with a length we can use */
1645 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1646
1647 /* does the skb contain enough to deliver on the alleged length? */
1648 if (unlikely(skb->len < len_rthdr))
1649 goto fail; /* skb too short for claimed rt header extent */
Johannes Berge2ebc742007-07-27 15:43:22 +02001650
Johannes Berge2ebc742007-07-27 15:43:22 +02001651 /*
1652 * fix up the pointers accounting for the radiotap
1653 * header still being in there. We are being given
1654 * a precooked IEEE80211 header so no need for
1655 * normal processing
1656 */
Andy Green9b8a74e2007-07-27 15:43:24 +02001657 skb_set_mac_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02001658 /*
Andy Green9b8a74e2007-07-27 15:43:24 +02001659 * these are just fixed to the end of the rt area since we
1660 * don't have any better information and at this point, nobody cares
Johannes Berge2ebc742007-07-27 15:43:22 +02001661 */
Andy Green9b8a74e2007-07-27 15:43:24 +02001662 skb_set_network_header(skb, len_rthdr);
1663 skb_set_transport_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02001664
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001665 if (skb->len < len_rthdr + 2)
1666 goto fail;
1667
1668 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1669 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1670
1671 if (skb->len < len_rthdr + hdrlen)
1672 goto fail;
1673
Helmut Schaaf75f5c62011-08-01 11:32:52 +02001674 /*
1675 * Initialize skb->protocol if the injected frame is a data frame
1676 * carrying a rfc1042 header
1677 */
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001678 if (ieee80211_is_data(hdr->frame_control) &&
1679 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
1680 u8 *payload = (u8 *)hdr + hdrlen;
1681
Joe Perchesb203ca32012-05-08 18:56:52 +00001682 if (ether_addr_equal(payload, rfc1042_header))
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001683 skb->protocol = cpu_to_be16((payload[6] << 8) |
1684 payload[7]);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02001685 }
1686
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001687 memset(info, 0, sizeof(*info));
1688
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001689 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
Johannes Berg73b9f032011-10-07 14:01:26 +02001690 IEEE80211_TX_CTL_INJECTED;
1691
1692 /* process and remove the injection radiotap header */
1693 if (!ieee80211_parse_tx_radiotap(skb))
1694 goto fail;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001695
1696 rcu_read_lock();
1697
1698 /*
1699 * We process outgoing injected frames that have a local address
1700 * we handle as though they are non-injected frames.
1701 * This code here isn't entirely correct, the local MAC address
1702 * isn't always enough to find the interface to use; for proper
1703 * VLAN/WDS support we will need a different mechanism (which
1704 * likely isn't going to be monitor interfaces).
1705 */
1706 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1707
1708 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
1709 if (!ieee80211_sdata_running(tmp_sdata))
1710 continue;
1711 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1712 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1713 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
1714 continue;
Joe Perchesb203ca32012-05-08 18:56:52 +00001715 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001716 sdata = tmp_sdata;
1717 break;
1718 }
1719 }
Johannes Berg7351c6b2009-11-19 01:08:30 +01001720
Johannes Berg55de9082012-07-26 17:24:39 +02001721 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1722 if (!chanctx_conf) {
1723 tmp_sdata = rcu_dereference(local->monitor_sdata);
1724 if (tmp_sdata)
1725 chanctx_conf =
1726 rcu_dereference(tmp_sdata->vif.chanctx_conf);
1727 }
Johannes Berg55de9082012-07-26 17:24:39 +02001728
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01001729 if (chanctx_conf)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001730 chandef = &chanctx_conf->def;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01001731 else if (!local->use_chanctx)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001732 chandef = &local->_oper_chandef;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01001733 else
1734 goto fail_rcu;
Johannes Berg55de9082012-07-26 17:24:39 +02001735
1736 /*
1737 * Frame injection is not allowed if beaconing is not allowed
1738 * or if we need radar detection. Beaconing is usually not allowed when
1739 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1740 * Passive scan is also used in world regulatory domains where
1741 * your country is not known and as such it should be treated as
1742 * NO TX unless the channel is explicitly allowed in which case
1743 * your current regulatory domain would not have the passive scan
1744 * flag.
1745 *
1746 * Since AP mode uses monitor interfaces to inject/TX management
1747 * frames we can make AP mode the exception to this rule once it
1748 * supports radar detection as its implementation can deal with
1749 * radar detection by itself. We can do that later by adding a
1750 * monitor flag interfaces used for AP support.
1751 */
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001752 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
1753 sdata->vif.type))
Johannes Berg55de9082012-07-26 17:24:39 +02001754 goto fail_rcu;
1755
Johannes Berg73c4e192014-11-09 18:50:09 +02001756 info->band = chandef->chan->band;
1757 ieee80211_xmit(sdata, skb);
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001758 rcu_read_unlock();
1759
Johannes Berge2ebc742007-07-27 15:43:22 +02001760 return NETDEV_TX_OK;
Andy Green9b8a74e2007-07-27 15:43:24 +02001761
Johannes Berg55de9082012-07-26 17:24:39 +02001762fail_rcu:
1763 rcu_read_unlock();
Andy Green9b8a74e2007-07-27 15:43:24 +02001764fail:
1765 dev_kfree_skb(skb);
1766 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
Johannes Berge2ebc742007-07-27 15:43:22 +02001767}
1768
Matti Gottliebad38bfc2013-11-18 19:06:45 +02001769/*
1770 * Measure Tx frame arrival time for Tx latency statistics calculation
1771 * A single Tx frame latency should be measured from when it is entering the
1772 * Kernel until we receive Tx complete confirmation indication and the skb is
1773 * freed.
1774 */
1775static void ieee80211_tx_latency_start_msrmnt(struct ieee80211_local *local,
1776 struct sk_buff *skb)
1777{
Matti Gottliebad38bfc2013-11-18 19:06:45 +02001778 struct ieee80211_tx_latency_bin_ranges *tx_latency;
1779
1780 tx_latency = rcu_dereference(local->tx_latency);
1781 if (!tx_latency)
1782 return;
Thomas Gleixner8d7b70f2014-06-11 23:59:18 +00001783 skb->tstamp = ktime_get();
Matti Gottliebad38bfc2013-11-18 19:06:45 +02001784}
1785
Johannes Berge2ebc742007-07-27 15:43:22 +02001786/**
Johannes Berg4c9451e2014-11-09 18:50:10 +02001787 * ieee80211_build_hdr - build 802.11 header in the given frame
1788 * @sdata: virtual interface to build the header for
1789 * @skb: the skb to build the header in
Liad Kaufman24d342c2014-11-09 18:50:07 +02001790 * @info_flags: skb flags to set
Johannes Berge2ebc742007-07-27 15:43:22 +02001791 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02001792 * This function takes the skb with 802.3 header and reformats the header to
1793 * the appropriate IEEE 802.11 header based on which interface the packet is
1794 * being transmitted on.
Johannes Berge2ebc742007-07-27 15:43:22 +02001795 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02001796 * Note that this function also takes care of the TX status request and
1797 * potential unsharing of the SKB - this needs to be interleaved with the
1798 * header building.
1799 *
1800 * The function requires the read-side RCU lock held
1801 *
1802 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
Johannes Berge2ebc742007-07-27 15:43:22 +02001803 */
Johannes Berg4c9451e2014-11-09 18:50:10 +02001804static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
1805 struct sk_buff *skb, u32 info_flags)
Johannes Berge2ebc742007-07-27 15:43:22 +02001806{
Johannes Berg133b8222008-09-16 14:18:59 +02001807 struct ieee80211_local *local = sdata->local;
Felix Fietkau489ee912010-12-18 19:30:48 +01001808 struct ieee80211_tx_info *info;
Johannes Bergdcf33962012-07-30 15:11:56 +02001809 int head_need;
Harvey Harrison065e96052008-06-22 16:45:27 -07001810 u16 ethertype, hdrlen, meshhdrlen = 0;
1811 __le16 fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02001812 struct ieee80211_hdr hdr;
Wey-Yi Guyff67bb82010-08-21 07:23:29 -07001813 struct ieee80211s_hdr mesh_hdr __maybe_unused;
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08001814 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +02001815 const u8 *encaps_data;
1816 int encaps_len, skip_header_bytes;
Jiri Slabye8bf9642007-08-28 17:01:54 -04001817 int nh_pos, h_pos;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001818 struct sta_info *sta = NULL;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001819 bool wme_sta = false, authorized = false, tdls_auth = false;
Arik Nemtsov9deba042014-06-11 17:18:18 +03001820 bool tdls_peer = false, tdls_setup_frame = false;
Johannes Berga729cff2011-11-06 14:13:34 +01001821 bool multicast;
Johannes Berga729cff2011-11-06 14:13:34 +01001822 u16 info_id = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02001823 struct ieee80211_chanctx_conf *chanctx_conf;
1824 struct ieee80211_sub_if_data *ap_sdata;
1825 enum ieee80211_band band;
Johannes Berg4c9451e2014-11-09 18:50:10 +02001826 int ret;
Johannes Berge2ebc742007-07-27 15:43:22 +02001827
Johannes Berge2ebc742007-07-27 15:43:22 +02001828 /* convert Ethernet header to proper 802.11 header (based on
1829 * operation mode) */
1830 ethertype = (skb->data[12] << 8) | skb->data[13];
Harvey Harrison065e96052008-06-22 16:45:27 -07001831 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
Johannes Berge2ebc742007-07-27 15:43:22 +02001832
Johannes Berg51fb61e2007-12-19 01:31:27 +01001833 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +02001834 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg9bc383d2009-11-19 11:55:19 +01001835 sta = rcu_dereference(sdata->u.vlan.sta);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001836 if (sta) {
1837 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1838 /* RA TA DA SA */
1839 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001840 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001841 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1842 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1843 hdrlen = 30;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001844 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02001845 wme_sta = sta->sta.wme;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001846 }
Johannes Berg55de9082012-07-26 17:24:39 +02001847 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1848 u.ap);
1849 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02001850 if (!chanctx_conf) {
1851 ret = -ENOTCONN;
1852 goto free;
1853 }
Johannes Berg4bf88532012-11-09 11:39:59 +01001854 band = chanctx_conf->def.chan->band;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01001855 if (sta)
1856 break;
1857 /* fall through */
1858 case NL80211_IFTYPE_AP:
Arnd Bergmannfe801232013-01-25 14:14:33 +00001859 if (sdata->vif.type == NL80211_IFTYPE_AP)
1860 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02001861 if (!chanctx_conf) {
1862 ret = -ENOTCONN;
1863 goto free;
1864 }
Harvey Harrison065e96052008-06-22 16:45:27 -07001865 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
Johannes Berge2ebc742007-07-27 15:43:22 +02001866 /* DA BSSID SA */
1867 memcpy(hdr.addr1, skb->data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001868 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02001869 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
1870 hdrlen = 24;
Johannes Berg4bf88532012-11-09 11:39:59 +01001871 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04001872 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02001873 case NL80211_IFTYPE_WDS:
Harvey Harrison065e96052008-06-22 16:45:27 -07001874 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
Johannes Berge2ebc742007-07-27 15:43:22 +02001875 /* RA TA DA SA */
1876 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01001877 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02001878 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1879 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1880 hdrlen = 30;
Johannes Berg55de9082012-07-26 17:24:39 +02001881 /*
1882 * This is the exception! WDS style interfaces are prohibited
1883 * when channel contexts are in used so this must be valid
1884 */
Karl Beldan675a0b02013-03-25 16:26:57 +01001885 band = local->hw.conf.chandef.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04001886 break;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001887#ifdef CONFIG_MAC80211_MESH
Johannes Berg05c914f2008-09-11 00:01:58 +02001888 case NL80211_IFTYPE_MESH_POINT:
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08001889 if (!is_multicast_ether_addr(skb->data)) {
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08001890 struct sta_info *next_hop;
1891 bool mpp_lookup = true;
1892
Johannes Bergbf7cd942013-02-15 14:40:31 +01001893 mpath = mesh_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08001894 if (mpath) {
1895 mpp_lookup = false;
1896 next_hop = rcu_dereference(mpath->next_hop);
1897 if (!next_hop ||
1898 !(mpath->flags & (MESH_PATH_ACTIVE |
1899 MESH_PATH_RESOLVING)))
1900 mpp_lookup = true;
1901 }
1902
1903 if (mpp_lookup)
Johannes Bergbf7cd942013-02-15 14:40:31 +01001904 mppath = mpp_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08001905
1906 if (mppath && mpath)
1907 mesh_path_del(mpath->sdata, mpath->dst);
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08001908 }
YanBo79617de2008-09-22 13:30:32 +08001909
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06001910 /*
Joel A Fernandes9d525012011-01-10 00:44:23 -06001911 * Use address extension if it is a packet from
1912 * another interface or if we know the destination
1913 * is being proxied by a portal (i.e. portal address
1914 * differs from proxied address)
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06001915 */
Joe Perchesb203ca32012-05-08 18:56:52 +00001916 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
1917 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
Javier Cardona3c5772a2009-08-10 12:15:48 -07001918 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
1919 skb->data, skb->data + ETH_ALEN);
Johannes Bergbf7cd942013-02-15 14:40:31 +01001920 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
1921 NULL, NULL);
YanBo79617de2008-09-22 13:30:32 +08001922 } else {
Thomas Pedersen27f01122012-08-20 11:28:25 -07001923 /* DS -> MBSS (802.11-2012 13.11.3.3).
1924 * For unicast with unknown forwarding information,
1925 * destination might be in the MBSS or if that fails
1926 * forwarded to another mesh gate. In either case
1927 * resolution will be handled in ieee80211_xmit(), so
1928 * leave the original DA. This also works for mcast */
1929 const u8 *mesh_da = skb->data;
YanBo79617de2008-09-22 13:30:32 +08001930
Thomas Pedersen27f01122012-08-20 11:28:25 -07001931 if (mppath)
1932 mesh_da = mppath->mpp;
1933 else if (mpath)
1934 mesh_da = mpath->dst;
Thomas Pedersen27f01122012-08-20 11:28:25 -07001935
Javier Cardona3c5772a2009-08-10 12:15:48 -07001936 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
Johannes Berg47846c92009-11-25 17:46:19 +01001937 mesh_da, sdata->vif.addr);
Thomas Pedersen27f01122012-08-20 11:28:25 -07001938 if (is_multicast_ether_addr(mesh_da))
1939 /* DA TA mSA AE:SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01001940 meshhdrlen = ieee80211_new_mesh_header(
1941 sdata, &mesh_hdr,
1942 skb->data + ETH_ALEN, NULL);
Javier Cardona3c5772a2009-08-10 12:15:48 -07001943 else
Thomas Pedersen27f01122012-08-20 11:28:25 -07001944 /* RA TA mDA mSA AE:DA SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01001945 meshhdrlen = ieee80211_new_mesh_header(
1946 sdata, &mesh_hdr, skb->data,
1947 skb->data + ETH_ALEN);
YanBo79617de2008-09-22 13:30:32 +08001948
YanBo79617de2008-09-22 13:30:32 +08001949 }
Johannes Berg55de9082012-07-26 17:24:39 +02001950 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02001951 if (!chanctx_conf) {
1952 ret = -ENOTCONN;
1953 goto free;
1954 }
Johannes Berg4bf88532012-11-09 11:39:59 +01001955 band = chanctx_conf->def.chan->band;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01001956 break;
1957#endif
Johannes Berg05c914f2008-09-11 00:01:58 +02001958 case NL80211_IFTYPE_STATION:
Arik Nemtsov941c93c2011-09-28 14:12:54 +03001959 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
Arik Nemtsov941c93c2011-09-28 14:12:54 +03001960 sta = sta_info_get(sdata, skb->data);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001961 if (sta) {
1962 authorized = test_sta_flag(sta,
1963 WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02001964 wme_sta = sta->sta.wme;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001965 tdls_peer = test_sta_flag(sta,
Arik Nemtsov9deba042014-06-11 17:18:18 +03001966 WLAN_STA_TDLS_PEER);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001967 tdls_auth = test_sta_flag(sta,
1968 WLAN_STA_TDLS_PEER_AUTH);
1969 }
Arik Nemtsov941c93c2011-09-28 14:12:54 +03001970
Arik Nemtsov9deba042014-06-11 17:18:18 +03001971 if (tdls_peer)
1972 tdls_setup_frame =
1973 ethertype == ETH_P_TDLS &&
1974 skb->len > 14 &&
1975 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
Arik Nemtsov941c93c2011-09-28 14:12:54 +03001976 }
1977
Arik Nemtsov9deba042014-06-11 17:18:18 +03001978 /*
1979 * TDLS link during setup - throw out frames to peer. We allow
1980 * TDLS-setup frames to unauthorized peers for the special case
1981 * of a link teardown after a TDLS sta is removed due to being
1982 * unreachable.
1983 */
Johannes Berg4c9451e2014-11-09 18:50:10 +02001984 if (tdls_peer && !tdls_auth && !tdls_setup_frame) {
1985 ret = -EINVAL;
1986 goto free;
1987 }
Arik Nemtsov941c93c2011-09-28 14:12:54 +03001988
Arik Nemtsov9deba042014-06-11 17:18:18 +03001989 /* send direct packets to authorized TDLS peers */
1990 if (tdls_peer && tdls_auth) {
Arik Nemtsov941c93c2011-09-28 14:12:54 +03001991 /* DA SA BSSID */
1992 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1993 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1994 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
1995 hdrlen = 24;
1996 } else if (sdata->u.mgd.use_4addr &&
1997 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
1998 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
1999 IEEE80211_FCTL_TODS);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002000 /* RA TA DA SA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002001 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002002 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002003 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2004 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2005 hdrlen = 30;
2006 } else {
2007 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2008 /* BSSID SA DA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002009 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002010 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2011 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2012 hdrlen = 24;
2013 }
Johannes Berg55de9082012-07-26 17:24:39 +02002014 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002015 if (!chanctx_conf) {
2016 ret = -ENOTCONN;
2017 goto free;
2018 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002019 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002020 break;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002021 case NL80211_IFTYPE_OCB:
2022 /* DA SA BSSID */
2023 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2024 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2025 eth_broadcast_addr(hdr.addr3);
2026 hdrlen = 24;
2027 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002028 if (!chanctx_conf) {
2029 ret = -ENOTCONN;
2030 goto free;
2031 }
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002032 band = chanctx_conf->def.chan->band;
2033 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002034 case NL80211_IFTYPE_ADHOC:
Johannes Berge2ebc742007-07-27 15:43:22 +02002035 /* DA SA BSSID */
2036 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2037 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01002038 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002039 hdrlen = 24;
Johannes Berg55de9082012-07-26 17:24:39 +02002040 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002041 if (!chanctx_conf) {
2042 ret = -ENOTCONN;
2043 goto free;
2044 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002045 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002046 break;
2047 default:
Johannes Berg4c9451e2014-11-09 18:50:10 +02002048 ret = -EINVAL;
2049 goto free;
Johannes Berge2ebc742007-07-27 15:43:22 +02002050 }
2051
Johannes Berg7d185b82008-01-28 17:11:43 +01002052 /*
2053 * There's no need to try to look up the destination
2054 * if it is a multicast address (which can only happen
2055 * in AP mode)
2056 */
Johannes Berga729cff2011-11-06 14:13:34 +01002057 multicast = is_multicast_ether_addr(hdr.addr1);
2058 if (!multicast) {
Johannes Bergabe60632009-11-25 17:46:18 +01002059 sta = sta_info_get(sdata, hdr.addr1);
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002060 if (sta) {
2061 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02002062 wme_sta = sta->sta.wme;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002063 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002064 }
2065
Javier Cardona4777be42011-09-07 17:49:52 -07002066 /* For mesh, the use of the QoS header is mandatory */
2067 if (ieee80211_vif_is_mesh(&sdata->vif))
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002068 wme_sta = true;
Javier Cardona4777be42011-09-07 17:49:52 -07002069
Johannes Berg3434fbd2008-05-03 00:59:37 +02002070 /* receiver and we are QoS enabled, use a QoS type frame */
Johannes Berg32c50572012-03-28 11:04:29 +02002071 if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) {
Harvey Harrison065e96052008-06-22 16:45:27 -07002072 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002073 hdrlen += 2;
2074 }
2075
2076 /*
Johannes Berg238814f2008-01-28 17:19:37 +01002077 * Drop unicast frames to unauthorised stations unless they are
2078 * EAPOL frames from the local station.
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002079 */
Johannes Berg55182e42011-10-12 17:28:21 +02002080 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002081 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
Sergey Ryazanova6ececf2013-08-30 01:35:09 +04002082 !multicast && !authorized &&
Johannes Berg55182e42011-10-12 17:28:21 +02002083 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002084 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002085#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002086 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
Johannes Berg4c9451e2014-11-09 18:50:10 +02002087 sdata->name, hdr.addr1);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002088#endif
2089
2090 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2091
Johannes Berg4c9451e2014-11-09 18:50:10 +02002092 ret = -EPERM;
2093 goto free;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002094 }
2095
Johannes Berga729cff2011-11-06 14:13:34 +01002096 if (unlikely(!multicast && skb->sk &&
2097 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002098 struct sk_buff *ack_skb = skb_clone_sk(skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002099
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002100 if (ack_skb) {
Johannes Berga729cff2011-11-06 14:13:34 +01002101 unsigned long flags;
Tejun Heo9475af62013-02-27 17:04:59 -08002102 int id;
Johannes Berga729cff2011-11-06 14:13:34 +01002103
2104 spin_lock_irqsave(&local->ack_status_lock, flags);
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002105 id = idr_alloc(&local->ack_status_frames, ack_skb,
Tejun Heo9475af62013-02-27 17:04:59 -08002106 1, 0x10000, GFP_ATOMIC);
Johannes Berga729cff2011-11-06 14:13:34 +01002107 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2108
Tejun Heo9475af62013-02-27 17:04:59 -08002109 if (id >= 0) {
Johannes Berga729cff2011-11-06 14:13:34 +01002110 info_id = id;
2111 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
Johannes Berga729cff2011-11-06 14:13:34 +01002112 } else {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002113 kfree_skb(ack_skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002114 }
Johannes Berga729cff2011-11-06 14:13:34 +01002115 }
2116 }
2117
Helmut Schaa7e244702010-12-02 18:44:09 +01002118 /*
2119 * If the skb is shared we need to obtain our own copy.
2120 */
2121 if (skb_shared(skb)) {
Johannes Berga729cff2011-11-06 14:13:34 +01002122 struct sk_buff *tmp_skb = skb;
2123
2124 /* can't happen -- skb is a clone if info_id != 0 */
2125 WARN_ON(info_id);
2126
Felix Fietkauf8a0a782010-12-18 19:30:50 +01002127 skb = skb_clone(skb, GFP_ATOMIC);
Helmut Schaa7e244702010-12-02 18:44:09 +01002128 kfree_skb(tmp_skb);
2129
Johannes Berg4c9451e2014-11-09 18:50:10 +02002130 if (!skb) {
2131 ret = -ENOMEM;
2132 goto free;
2133 }
Helmut Schaa7e244702010-12-02 18:44:09 +01002134 }
2135
Harvey Harrison065e96052008-06-22 16:45:27 -07002136 hdr.frame_control = fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002137 hdr.duration_id = 0;
2138 hdr.seq_ctrl = 0;
2139
2140 skip_header_bytes = ETH_HLEN;
2141 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2142 encaps_data = bridge_tunnel_header;
2143 encaps_len = sizeof(bridge_tunnel_header);
2144 skip_header_bytes -= 2;
Simon Hormane5c5d222013-03-28 13:38:25 +09002145 } else if (ethertype >= ETH_P_802_3_MIN) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002146 encaps_data = rfc1042_header;
2147 encaps_len = sizeof(rfc1042_header);
2148 skip_header_bytes -= 2;
2149 } else {
2150 encaps_data = NULL;
2151 encaps_len = 0;
2152 }
2153
Helmut Schaa7e244702010-12-02 18:44:09 +01002154 nh_pos = skb_network_header(skb) - skb->data;
2155 h_pos = skb_transport_header(skb) - skb->data;
2156
Johannes Berge2ebc742007-07-27 15:43:22 +02002157 skb_pull(skb, skip_header_bytes);
2158 nh_pos -= skip_header_bytes;
2159 h_pos -= skip_header_bytes;
2160
Johannes Berg23c07522008-05-29 10:38:53 +02002161 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002162
Johannes Berg23c07522008-05-29 10:38:53 +02002163 /*
2164 * So we need to modify the skb header and hence need a copy of
2165 * that. The head_need variable above doesn't, so far, include
2166 * the needed header space that we don't need right away. If we
2167 * can, then we don't reallocate right now but only after the
2168 * frame arrives at the master device (if it does...)
2169 *
2170 * If we cannot, however, then we will reallocate to include all
2171 * the ever needed space. Also, if we need to reallocate it anyway,
2172 * make it big enough for everything we may ever need.
2173 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002174
David S. Miller3a5be7d2008-06-18 01:19:51 -07002175 if (head_need > 0 || skb_cloned(skb)) {
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002176 head_need += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02002177 head_need += local->tx_headroom;
2178 head_need = max_t(int, 0, head_need);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002179 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2180 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg1c963be2012-11-07 14:02:30 +01002181 skb = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002182 return ERR_PTR(-ENOMEM);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002183 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002184 }
2185
2186 if (encaps_data) {
2187 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2188 nh_pos += encaps_len;
2189 h_pos += encaps_len;
2190 }
Johannes Bergc29b9b92007-09-14 11:10:24 -04002191
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002192#ifdef CONFIG_MAC80211_MESH
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002193 if (meshhdrlen > 0) {
2194 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2195 nh_pos += meshhdrlen;
2196 h_pos += meshhdrlen;
2197 }
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002198#endif
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002199
Harvey Harrison065e96052008-06-22 16:45:27 -07002200 if (ieee80211_is_data_qos(fc)) {
Johannes Bergc29b9b92007-09-14 11:10:24 -04002201 __le16 *qos_control;
2202
Weilong Chenf359d3f2013-12-18 15:44:16 +08002203 qos_control = (__le16 *) skb_push(skb, 2);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002204 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2205 /*
2206 * Maybe we could actually set some fields here, for now just
2207 * initialise to zero to indicate no special operation.
2208 */
2209 *qos_control = 0;
2210 } else
2211 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2212
Johannes Berge2ebc742007-07-27 15:43:22 +02002213 nh_pos += hdrlen;
2214 h_pos += hdrlen;
2215
Johannes Berge2ebc742007-07-27 15:43:22 +02002216 /* Update skb pointers to various headers since this modified frame
2217 * is going to go through Linux networking code that may potentially
2218 * need things like pointer to IP header. */
2219 skb_set_mac_header(skb, 0);
2220 skb_set_network_header(skb, nh_pos);
2221 skb_set_transport_header(skb, h_pos);
2222
Felix Fietkau489ee912010-12-18 19:30:48 +01002223 info = IEEE80211_SKB_CB(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002224 memset(info, 0, sizeof(*info));
2225
Johannes Berga729cff2011-11-06 14:13:34 +01002226 info->flags = info_flags;
2227 info->ack_frame_id = info_id;
Johannes Berg73c4e192014-11-09 18:50:09 +02002228 info->band = band;
Johannes Berga729cff2011-11-06 14:13:34 +01002229
Johannes Berg4c9451e2014-11-09 18:50:10 +02002230 return skb;
2231 free:
2232 kfree_skb(skb);
2233 return ERR_PTR(ret);
Johannes Berge2ebc742007-07-27 15:43:22 +02002234}
2235
Johannes Berg4c9451e2014-11-09 18:50:10 +02002236void __ieee80211_subif_start_xmit(struct sk_buff *skb,
2237 struct net_device *dev,
2238 u32 info_flags)
2239{
2240 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2241 struct ieee80211_local *local = sdata->local;
2242
2243 if (unlikely(skb->len < ETH_HLEN)) {
2244 kfree_skb(skb);
2245 return;
2246 }
2247
2248 rcu_read_lock();
2249
2250 /* Measure frame arrival for Tx latency statistics calculation */
2251 ieee80211_tx_latency_start_msrmnt(local, skb);
2252
2253 skb = ieee80211_build_hdr(sdata, skb, info_flags);
2254 if (IS_ERR(skb))
2255 goto out;
2256
2257 dev->stats.tx_packets++;
2258 dev->stats.tx_bytes += skb->len;
2259 dev->trans_start = jiffies;
2260
2261 ieee80211_xmit(sdata, skb);
2262 out:
2263 rcu_read_unlock();
2264}
2265
2266/**
2267 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
2268 * @skb: packet to be sent
2269 * @dev: incoming interface
2270 *
2271 * On failure skb will be freed.
2272 */
Liad Kaufman24d342c2014-11-09 18:50:07 +02002273netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
2274 struct net_device *dev)
2275{
2276 __ieee80211_subif_start_xmit(skb, dev, 0);
2277 return NETDEV_TX_OK;
2278}
Johannes Berge2ebc742007-07-27 15:43:22 +02002279
Johannes Berg7528ec52014-11-09 18:50:11 +02002280struct sk_buff *
2281ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
2282 struct sk_buff *skb, u32 info_flags)
2283{
2284 struct ieee80211_hdr *hdr;
2285 struct ieee80211_tx_data tx = {
2286 .local = sdata->local,
2287 .sdata = sdata,
2288 };
2289
2290 rcu_read_lock();
2291
2292 skb = ieee80211_build_hdr(sdata, skb, info_flags);
2293 if (IS_ERR(skb))
2294 goto out;
2295
2296 hdr = (void *)skb->data;
2297 tx.sta = sta_info_get(sdata, hdr->addr1);
2298 tx.skb = skb;
2299
2300 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
2301 rcu_read_unlock();
2302 kfree_skb(skb);
2303 return ERR_PTR(-EINVAL);
2304 }
2305
2306out:
2307 rcu_read_unlock();
2308 return skb;
2309}
2310
Johannes Berge2530082008-05-17 00:57:14 +02002311/*
2312 * ieee80211_clear_tx_pending may not be called in a context where
2313 * it is possible that it packets could come in again.
2314 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002315void ieee80211_clear_tx_pending(struct ieee80211_local *local)
2316{
Felix Fietkau1f98ab72012-11-10 03:44:14 +01002317 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01002318 int i;
Johannes Berge2ebc742007-07-27 15:43:22 +02002319
Felix Fietkau1f98ab72012-11-10 03:44:14 +01002320 for (i = 0; i < local->hw.queues; i++) {
2321 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
2322 ieee80211_free_txskb(&local->hw, skb);
2323 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002324}
2325
Johannes Berg7bb45682011-02-24 14:42:06 +01002326/*
2327 * Returns false if the frame couldn't be transmitted but was queued instead,
2328 * which in this case means re-queued -- take as an indication to stop sending
2329 * more pending frames.
2330 */
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002331static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
2332 struct sk_buff *skb)
2333{
2334 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2335 struct ieee80211_sub_if_data *sdata;
2336 struct sta_info *sta;
2337 struct ieee80211_hdr *hdr;
Johannes Berg7bb45682011-02-24 14:42:06 +01002338 bool result;
Johannes Berg55de9082012-07-26 17:24:39 +02002339 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002340
Johannes Berg5061b0c2009-07-14 00:33:34 +02002341 sdata = vif_to_sdata(info->control.vif);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002342
2343 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
Johannes Berg55de9082012-07-26 17:24:39 +02002344 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2345 if (unlikely(!chanctx_conf)) {
2346 dev_kfree_skb(skb);
2347 return true;
2348 }
Johannes Berg73c4e192014-11-09 18:50:09 +02002349 info->band = chanctx_conf->def.chan->band;
2350 result = ieee80211_tx(sdata, skb, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002351 } else {
Johannes Berg252b86c2011-11-16 15:28:55 +01002352 struct sk_buff_head skbs;
2353
2354 __skb_queue_head_init(&skbs);
2355 __skb_queue_tail(&skbs, skb);
2356
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002357 hdr = (struct ieee80211_hdr *)skb->data;
Johannes Bergabe60632009-11-25 17:46:18 +01002358 sta = sta_info_get(sdata, hdr->addr1);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002359
Johannes Berg74e4dbf2011-11-16 15:28:57 +01002360 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002361 }
2362
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002363 return result;
2364}
2365
Johannes Berge2530082008-05-17 00:57:14 +02002366/*
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002367 * Transmit all pending packets. Called from tasklet.
Johannes Berge2530082008-05-17 00:57:14 +02002368 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002369void ieee80211_tx_pending(unsigned long data)
2370{
2371 struct ieee80211_local *local = (struct ieee80211_local *)data;
Johannes Berg2a577d92009-03-23 17:28:37 +01002372 unsigned long flags;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002373 int i;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002374 bool txok;
Johannes Berge2ebc742007-07-27 15:43:22 +02002375
Johannes Bergf0e72852009-03-23 17:28:36 +01002376 rcu_read_lock();
Johannes Berg2a577d92009-03-23 17:28:37 +01002377
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002378 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg176be722009-03-12 23:49:28 +01002379 for (i = 0; i < local->hw.queues; i++) {
Johannes Berg2a577d92009-03-23 17:28:37 +01002380 /*
2381 * If queue is stopped by something other than due to pending
2382 * frames, or we have no pending frames, proceed to next queue.
2383 */
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002384 if (local->queue_stop_reasons[i] ||
Johannes Berg2a577d92009-03-23 17:28:37 +01002385 skb_queue_empty(&local->pending[i]))
Johannes Berge2ebc742007-07-27 15:43:22 +02002386 continue;
Johannes Berge2530082008-05-17 00:57:14 +02002387
Johannes Berg2a577d92009-03-23 17:28:37 +01002388 while (!skb_queue_empty(&local->pending[i])) {
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002389 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
Johannes Berg5061b0c2009-07-14 00:33:34 +02002390 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +02002391
Johannes Berga7bc3762009-07-27 10:33:31 +02002392 if (WARN_ON(!info->control.vif)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02002393 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +02002394 continue;
2395 }
2396
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002397 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2398 flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01002399
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002400 txok = ieee80211_tx_pending_skb(local, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002401 spin_lock_irqsave(&local->queue_stop_reason_lock,
2402 flags);
2403 if (!txok)
Johannes Berg2a577d92009-03-23 17:28:37 +01002404 break;
Johannes Berge2ebc742007-07-27 15:43:22 +02002405 }
Johannes Berg7236fe22010-03-22 13:42:43 -07002406
2407 if (skb_queue_empty(&local->pending[i]))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02002408 ieee80211_propagate_queue_wake(local, i);
Johannes Berge2ebc742007-07-27 15:43:22 +02002409 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002410 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01002411
Johannes Bergf0e72852009-03-23 17:28:36 +01002412 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02002413}
2414
2415/* functions for drivers to get certain frames */
2416
Marco Porscheac70c12013-01-07 16:04:50 +01002417static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002418 struct ps_data *ps, struct sk_buff *skb,
2419 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02002420{
2421 u8 *pos, *tim;
2422 int aid0 = 0;
2423 int i, have_bits = 0, n1, n2;
2424
2425 /* Generate bitmap for TIM only if there are any STAs in power save
2426 * mode. */
Marco Porschd012a602012-10-10 12:39:50 -07002427 if (atomic_read(&ps->num_sta_ps) > 0)
Johannes Berge2ebc742007-07-27 15:43:22 +02002428 /* in the hope that this is faster than
2429 * checking byte-for-byte */
Weilong Chenf359d3f2013-12-18 15:44:16 +08002430 have_bits = !bitmap_empty((unsigned long *)ps->tim,
Johannes Berge2ebc742007-07-27 15:43:22 +02002431 IEEE80211_MAX_AID+1);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002432 if (!is_template) {
2433 if (ps->dtim_count == 0)
2434 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
2435 else
2436 ps->dtim_count--;
2437 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002438
2439 tim = pos = (u8 *) skb_put(skb, 6);
2440 *pos++ = WLAN_EID_TIM;
2441 *pos++ = 4;
Marco Porschd012a602012-10-10 12:39:50 -07002442 *pos++ = ps->dtim_count;
Johannes Berg88600202012-02-13 15:17:18 +01002443 *pos++ = sdata->vif.bss_conf.dtim_period;
Johannes Berge2ebc742007-07-27 15:43:22 +02002444
Marco Porschd012a602012-10-10 12:39:50 -07002445 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
Johannes Berge2ebc742007-07-27 15:43:22 +02002446 aid0 = 1;
2447
Marco Porschd012a602012-10-10 12:39:50 -07002448 ps->dtim_bc_mc = aid0 == 1;
Christian Lamparter512119b2011-01-31 20:48:44 +02002449
Johannes Berge2ebc742007-07-27 15:43:22 +02002450 if (have_bits) {
2451 /* Find largest even number N1 so that bits numbered 1 through
2452 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2453 * (N2 + 1) x 8 through 2007 are 0. */
2454 n1 = 0;
2455 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
Marco Porschd012a602012-10-10 12:39:50 -07002456 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002457 n1 = i & 0xfe;
2458 break;
2459 }
2460 }
2461 n2 = n1;
2462 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
Marco Porschd012a602012-10-10 12:39:50 -07002463 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002464 n2 = i;
2465 break;
2466 }
2467 }
2468
2469 /* Bitmap control */
2470 *pos++ = n1 | aid0;
2471 /* Part Virt Bitmap */
Eliad Peller5220da32011-11-24 16:50:00 +02002472 skb_put(skb, n2 - n1);
Marco Porschd012a602012-10-10 12:39:50 -07002473 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
Johannes Berge2ebc742007-07-27 15:43:22 +02002474
2475 tim[1] = n2 - n1 + 4;
Johannes Berge2ebc742007-07-27 15:43:22 +02002476 } else {
2477 *pos++ = aid0; /* Bitmap control */
2478 *pos++ = 0; /* Part Virt Bitmap */
2479 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002480}
2481
Marco Porscheac70c12013-01-07 16:04:50 +01002482static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002483 struct ps_data *ps, struct sk_buff *skb,
2484 bool is_template)
Marco Porscheac70c12013-01-07 16:04:50 +01002485{
2486 struct ieee80211_local *local = sdata->local;
2487
2488 /*
2489 * Not very nice, but we want to allow the driver to call
2490 * ieee80211_beacon_get() as a response to the set_tim()
2491 * callback. That, however, is already invoked under the
2492 * sta_lock to guarantee consistent and race-free update
2493 * of the tim bitmap in mac80211 and the driver.
2494 */
2495 if (local->tim_in_locked_section) {
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002496 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Marco Porscheac70c12013-01-07 16:04:50 +01002497 } else {
Johannes Berg1b917312013-02-22 12:55:01 +01002498 spin_lock_bh(&local->tim_lock);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002499 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Johannes Berg1b917312013-02-22 12:55:01 +01002500 spin_unlock_bh(&local->tim_lock);
Marco Porscheac70c12013-01-07 16:04:50 +01002501 }
2502
2503 return 0;
2504}
2505
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002506static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
2507 struct beacon_data *beacon)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002508{
2509 struct probe_resp *resp;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02002510 u8 *beacon_data;
2511 size_t beacon_data_len;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03002512 int i;
Michal Kazioraf296bd2014-06-05 14:21:36 +02002513 u8 count = beacon->csa_current_counter;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002514
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02002515 switch (sdata->vif.type) {
2516 case NL80211_IFTYPE_AP:
2517 beacon_data = beacon->tail;
2518 beacon_data_len = beacon->tail_len;
2519 break;
2520 case NL80211_IFTYPE_ADHOC:
2521 beacon_data = beacon->head;
2522 beacon_data_len = beacon->head_len;
2523 break;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07002524 case NL80211_IFTYPE_MESH_POINT:
2525 beacon_data = beacon->head;
2526 beacon_data_len = beacon->head_len;
2527 break;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02002528 default:
2529 return;
2530 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002531
Michal Kazioraf296bd2014-06-05 14:21:36 +02002532 rcu_read_lock();
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03002533 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02002534 resp = rcu_dereference(sdata->u.ap.probe_resp);
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03002535
Michal Kazioraf296bd2014-06-05 14:21:36 +02002536 if (beacon->csa_counter_offsets[i]) {
2537 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
2538 beacon_data_len)) {
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03002539 rcu_read_unlock();
2540 return;
2541 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02002542
2543 beacon_data[beacon->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03002544 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02002545
2546 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
2547 resp->data[resp->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03002548 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02002549 rcu_read_unlock();
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002550}
2551
2552u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
2553{
2554 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Michal Kazioraf296bd2014-06-05 14:21:36 +02002555 struct beacon_data *beacon = NULL;
2556 u8 count = 0;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002557
Michal Kazioraf296bd2014-06-05 14:21:36 +02002558 rcu_read_lock();
2559
2560 if (sdata->vif.type == NL80211_IFTYPE_AP)
2561 beacon = rcu_dereference(sdata->u.ap.beacon);
2562 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
2563 beacon = rcu_dereference(sdata->u.ibss.presp);
2564 else if (ieee80211_vif_is_mesh(&sdata->vif))
2565 beacon = rcu_dereference(sdata->u.mesh.beacon);
2566
2567 if (!beacon)
2568 goto unlock;
2569
2570 beacon->csa_current_counter--;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002571
2572 /* the counter should never reach 0 */
Michal Kazioraf296bd2014-06-05 14:21:36 +02002573 WARN_ON_ONCE(!beacon->csa_current_counter);
2574 count = beacon->csa_current_counter;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002575
Michal Kazioraf296bd2014-06-05 14:21:36 +02002576unlock:
2577 rcu_read_unlock();
2578 return count;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002579}
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002580EXPORT_SYMBOL(ieee80211_csa_update_counter);
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002581
2582bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
2583{
2584 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2585 struct beacon_data *beacon = NULL;
2586 u8 *beacon_data;
2587 size_t beacon_data_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002588 int ret = false;
2589
2590 if (!ieee80211_sdata_running(sdata))
2591 return false;
2592
2593 rcu_read_lock();
2594 if (vif->type == NL80211_IFTYPE_AP) {
2595 struct ieee80211_if_ap *ap = &sdata->u.ap;
2596
2597 beacon = rcu_dereference(ap->beacon);
2598 if (WARN_ON(!beacon || !beacon->tail))
2599 goto out;
2600 beacon_data = beacon->tail;
2601 beacon_data_len = beacon->tail_len;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02002602 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
2603 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2604
2605 beacon = rcu_dereference(ifibss->presp);
2606 if (!beacon)
2607 goto out;
2608
2609 beacon_data = beacon->head;
2610 beacon_data_len = beacon->head_len;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07002611 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
2612 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2613
2614 beacon = rcu_dereference(ifmsh->beacon);
2615 if (!beacon)
2616 goto out;
2617
2618 beacon_data = beacon->head;
2619 beacon_data_len = beacon->head_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002620 } else {
2621 WARN_ON(1);
2622 goto out;
2623 }
2624
Michal Kazior10d78f22014-06-05 14:21:37 +02002625 if (!beacon->csa_counter_offsets[0])
2626 goto out;
2627
Michal Kazioraf296bd2014-06-05 14:21:36 +02002628 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002629 goto out;
2630
Michal Kazioraf296bd2014-06-05 14:21:36 +02002631 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002632 ret = true;
2633 out:
2634 rcu_read_unlock();
2635
2636 return ret;
2637}
2638EXPORT_SYMBOL(ieee80211_csa_is_complete);
2639
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002640static struct sk_buff *
2641__ieee80211_beacon_get(struct ieee80211_hw *hw,
2642 struct ieee80211_vif *vif,
2643 struct ieee80211_mutable_offsets *offs,
2644 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02002645{
2646 struct ieee80211_local *local = hw_to_local(hw);
Michal Kazioraf296bd2014-06-05 14:21:36 +02002647 struct beacon_data *beacon = NULL;
Johannes Berg9d139c82008-07-09 14:40:37 +02002648 struct sk_buff *skb = NULL;
Johannes Berge039fa42008-05-15 12:55:29 +02002649 struct ieee80211_tx_info *info;
Johannes Berge2ebc742007-07-27 15:43:22 +02002650 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg55de9082012-07-26 17:24:39 +02002651 enum ieee80211_band band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02002652 struct ieee80211_tx_rate_control txrc;
Johannes Berg55de9082012-07-26 17:24:39 +02002653 struct ieee80211_chanctx_conf *chanctx_conf;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002654 int csa_off_base = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01002655
Johannes Berg5dfdaf52007-12-19 02:03:33 +01002656 rcu_read_lock();
Johannes Berge2ebc742007-07-27 15:43:22 +02002657
Johannes Berg32bfd352007-12-19 01:31:26 +01002658 sdata = vif_to_sdata(vif);
Johannes Berg55de9082012-07-26 17:24:39 +02002659 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berge2ebc742007-07-27 15:43:22 +02002660
Johannes Berg55de9082012-07-26 17:24:39 +02002661 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
Felix Fietkaueb3e5542011-01-24 19:28:49 +01002662 goto out;
2663
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002664 if (offs)
2665 memset(offs, 0, sizeof(*offs));
Johannes Bergeddcbb92009-10-29 08:30:35 +01002666
Johannes Berg05c914f2008-09-11 00:01:58 +02002667 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Marco Porschd012a602012-10-10 12:39:50 -07002668 struct ieee80211_if_ap *ap = &sdata->u.ap;
Marco Porschd012a602012-10-10 12:39:50 -07002669
Michal Kazioraf296bd2014-06-05 14:21:36 +02002670 beacon = rcu_dereference(ap->beacon);
Dan Carpenter3ad97fb2011-02-07 22:03:35 +03002671 if (beacon) {
Michal Kazior10d78f22014-06-05 14:21:37 +02002672 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002673 if (!is_template)
2674 ieee80211_csa_update_counter(vif);
2675
2676 ieee80211_set_csa(sdata, beacon);
2677 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02002678
Johannes Berg902acc72008-02-23 15:17:19 +01002679 /*
2680 * headroom, head length,
2681 * tail length and maximum TIM length
2682 */
2683 skb = dev_alloc_skb(local->tx_headroom +
2684 beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01002685 beacon->tail_len + 256 +
2686 local->hw.extra_beacon_tailroom);
Johannes Berg902acc72008-02-23 15:17:19 +01002687 if (!skb)
2688 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01002689
Johannes Berg902acc72008-02-23 15:17:19 +01002690 skb_reserve(skb, local->tx_headroom);
2691 memcpy(skb_put(skb, beacon->head_len), beacon->head,
2692 beacon->head_len);
2693
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002694 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
2695 is_template);
Johannes Berg902acc72008-02-23 15:17:19 +01002696
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002697 if (offs) {
2698 offs->tim_offset = beacon->head_len;
2699 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002700
2701 /* for AP the csa offsets are from tail */
2702 csa_off_base = skb->len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002703 }
Johannes Bergeddcbb92009-10-29 08:30:35 +01002704
Johannes Berg902acc72008-02-23 15:17:19 +01002705 if (beacon->tail)
2706 memcpy(skb_put(skb, beacon->tail_len),
2707 beacon->tail, beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02002708 } else
2709 goto out;
Johannes Berg05c914f2008-09-11 00:01:58 +02002710 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg46900292009-02-15 12:44:28 +01002711 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
Johannes Berg9d139c82008-07-09 14:40:37 +02002712 struct ieee80211_hdr *hdr;
Johannes Berg902acc72008-02-23 15:17:19 +01002713
Michal Kazioraf296bd2014-06-05 14:21:36 +02002714 beacon = rcu_dereference(ifibss->presp);
2715 if (!beacon)
Johannes Berg9d139c82008-07-09 14:40:37 +02002716 goto out;
2717
Michal Kazior10d78f22014-06-05 14:21:37 +02002718 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002719 if (!is_template)
2720 ieee80211_csa_update_counter(vif);
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02002721
Michal Kazioraf296bd2014-06-05 14:21:36 +02002722 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002723 }
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02002724
Michal Kazioraf296bd2014-06-05 14:21:36 +02002725 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01002726 local->hw.extra_beacon_tailroom);
Johannes Berg9d139c82008-07-09 14:40:37 +02002727 if (!skb)
2728 goto out;
Johannes Bergc3ffeab2013-03-07 20:54:29 +01002729 skb_reserve(skb, local->tx_headroom);
Michal Kazioraf296bd2014-06-05 14:21:36 +02002730 memcpy(skb_put(skb, beacon->head_len), beacon->head,
2731 beacon->head_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02002732
2733 hdr = (struct ieee80211_hdr *) skb->data;
Harvey Harrisone7827a72008-07-15 18:44:13 -07002734 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2735 IEEE80211_STYPE_BEACON);
Johannes Berg902acc72008-02-23 15:17:19 +01002736 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
Javier Cardonadbf498f2012-03-31 11:31:32 -07002737 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Johannes Berg472dbc42008-09-11 00:01:49 +02002738
Michal Kazioraf296bd2014-06-05 14:21:36 +02002739 beacon = rcu_dereference(ifmsh->beacon);
2740 if (!beacon)
Johannes Bergac1bd842011-01-18 13:45:32 +01002741 goto out;
Johannes Bergac1bd842011-01-18 13:45:32 +01002742
Michal Kazior10d78f22014-06-05 14:21:37 +02002743 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002744 if (!is_template)
2745 /* TODO: For mesh csa_counter is in TU, so
2746 * decrementing it by one isn't correct, but
2747 * for now we leave it consistent with overall
2748 * mac80211's behavior.
2749 */
2750 ieee80211_csa_update_counter(vif);
2751
Michal Kazioraf296bd2014-06-05 14:21:36 +02002752 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002753 }
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07002754
Javier Cardonadbf498f2012-03-31 11:31:32 -07002755 if (ifmsh->sync_ops)
Michal Kazioraf296bd2014-06-05 14:21:36 +02002756 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
Javier Cardonadbf498f2012-03-31 11:31:32 -07002757
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -07002758 skb = dev_alloc_skb(local->tx_headroom +
Michal Kazioraf296bd2014-06-05 14:21:36 +02002759 beacon->head_len +
Marco Porsch3f52b7e2013-01-30 18:14:08 +01002760 256 + /* TIM IE */
Michal Kazioraf296bd2014-06-05 14:21:36 +02002761 beacon->tail_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01002762 local->hw.extra_beacon_tailroom);
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002763 if (!skb)
2764 goto out;
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08002765 skb_reserve(skb, local->tx_headroom);
Michal Kazioraf296bd2014-06-05 14:21:36 +02002766 memcpy(skb_put(skb, beacon->head_len), beacon->head,
2767 beacon->head_len);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002768 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
2769
2770 if (offs) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02002771 offs->tim_offset = beacon->head_len;
2772 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002773 }
2774
Michal Kazioraf296bd2014-06-05 14:21:36 +02002775 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
2776 beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02002777 } else {
2778 WARN_ON(1);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01002779 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02002780 }
2781
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002782 /* CSA offsets */
Michal Kazioraf296bd2014-06-05 14:21:36 +02002783 if (offs && beacon) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002784 int i;
2785
2786 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02002787 u16 csa_off = beacon->csa_counter_offsets[i];
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03002788
2789 if (!csa_off)
2790 continue;
2791
2792 offs->csa_counter_offs[i] = csa_off_base + csa_off;
2793 }
2794 }
2795
Johannes Berg4bf88532012-11-09 11:39:59 +01002796 band = chanctx_conf->def.chan->band;
Johannes Berg55de9082012-07-26 17:24:39 +02002797
Johannes Berge039fa42008-05-15 12:55:29 +02002798 info = IEEE80211_SKB_CB(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002799
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002800 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Jouni Malinene00cfce2009-12-29 12:59:19 +02002801 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Berge039fa42008-05-15 12:55:29 +02002802 info->band = band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02002803
2804 memset(&txrc, 0, sizeof(txrc));
2805 txrc.hw = hw;
Johannes Berge31583c2012-07-26 14:07:46 +02002806 txrc.sband = local->hw.wiphy->bands[band];
Jouni Malinene00cfce2009-12-29 12:59:19 +02002807 txrc.bss_conf = &sdata->vif.bss_conf;
2808 txrc.skb = skb;
2809 txrc.reported_rate.idx = -1;
Jouni Malinen37eb0b12010-01-06 13:09:08 +02002810 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
Johannes Berge31583c2012-07-26 14:07:46 +02002811 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
Jouni Malinen37eb0b12010-01-06 13:09:08 +02002812 txrc.max_rate_idx = -1;
2813 else
2814 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
Felix Fietkau8f0729b2010-11-11 15:07:23 +01002815 txrc.bss = true;
Jouni Malinene00cfce2009-12-29 12:59:19 +02002816 rate_control_get_rate(sdata, NULL, &txrc);
Johannes Berge039fa42008-05-15 12:55:29 +02002817
2818 info->control.vif = vif;
Johannes Bergf591fa52008-07-10 11:21:26 +02002819
John W. Linvillea472e712010-05-06 14:45:17 -04002820 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
2821 IEEE80211_TX_CTL_ASSIGN_SEQ |
2822 IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge6a98542008-10-21 12:40:02 +02002823 out:
Johannes Berg5dfdaf52007-12-19 02:03:33 +01002824 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02002825 return skb;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03002826
2827}
2828
2829struct sk_buff *
2830ieee80211_beacon_get_template(struct ieee80211_hw *hw,
2831 struct ieee80211_vif *vif,
2832 struct ieee80211_mutable_offsets *offs)
2833{
2834 return __ieee80211_beacon_get(hw, vif, offs, true);
2835}
2836EXPORT_SYMBOL(ieee80211_beacon_get_template);
2837
2838struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
2839 struct ieee80211_vif *vif,
2840 u16 *tim_offset, u16 *tim_length)
2841{
2842 struct ieee80211_mutable_offsets offs = {};
2843 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
2844
2845 if (tim_offset)
2846 *tim_offset = offs.tim_offset;
2847
2848 if (tim_length)
2849 *tim_length = offs.tim_length;
2850
2851 return bcn;
Johannes Berge2ebc742007-07-27 15:43:22 +02002852}
Johannes Bergeddcbb92009-10-29 08:30:35 +01002853EXPORT_SYMBOL(ieee80211_beacon_get_tim);
Johannes Berge2ebc742007-07-27 15:43:22 +02002854
Arik Nemtsov02945822011-11-10 11:28:57 +02002855struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
2856 struct ieee80211_vif *vif)
2857{
2858 struct ieee80211_if_ap *ap = NULL;
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03002859 struct sk_buff *skb = NULL;
2860 struct probe_resp *presp = NULL;
Arik Nemtsov02945822011-11-10 11:28:57 +02002861 struct ieee80211_hdr *hdr;
2862 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2863
2864 if (sdata->vif.type != NL80211_IFTYPE_AP)
2865 return NULL;
2866
2867 rcu_read_lock();
2868
2869 ap = &sdata->u.ap;
2870 presp = rcu_dereference(ap->probe_resp);
2871 if (!presp)
2872 goto out;
2873
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03002874 skb = dev_alloc_skb(presp->len);
Arik Nemtsov02945822011-11-10 11:28:57 +02002875 if (!skb)
2876 goto out;
2877
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03002878 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
2879
Arik Nemtsov02945822011-11-10 11:28:57 +02002880 hdr = (struct ieee80211_hdr *) skb->data;
2881 memset(hdr->addr1, 0, sizeof(hdr->addr1));
2882
2883out:
2884 rcu_read_unlock();
2885 return skb;
2886}
2887EXPORT_SYMBOL(ieee80211_proberesp_get);
2888
Kalle Valo7044cc52010-01-05 20:16:19 +02002889struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
2890 struct ieee80211_vif *vif)
2891{
2892 struct ieee80211_sub_if_data *sdata;
2893 struct ieee80211_if_managed *ifmgd;
2894 struct ieee80211_pspoll *pspoll;
2895 struct ieee80211_local *local;
2896 struct sk_buff *skb;
2897
2898 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2899 return NULL;
2900
2901 sdata = vif_to_sdata(vif);
2902 ifmgd = &sdata->u.mgd;
2903 local = sdata->local;
2904
2905 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
Joe Perchesd15b8452011-08-29 14:17:31 -07002906 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02002907 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07002908
Kalle Valo7044cc52010-01-05 20:16:19 +02002909 skb_reserve(skb, local->hw.extra_tx_headroom);
2910
2911 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
2912 memset(pspoll, 0, sizeof(*pspoll));
2913 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
2914 IEEE80211_STYPE_PSPOLL);
2915 pspoll->aid = cpu_to_le16(ifmgd->aid);
2916
2917 /* aid in PS-Poll has its two MSBs each set to 1 */
2918 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
2919
2920 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
2921 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
2922
2923 return skb;
2924}
2925EXPORT_SYMBOL(ieee80211_pspoll_get);
2926
2927struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
2928 struct ieee80211_vif *vif)
2929{
2930 struct ieee80211_hdr_3addr *nullfunc;
2931 struct ieee80211_sub_if_data *sdata;
2932 struct ieee80211_if_managed *ifmgd;
2933 struct ieee80211_local *local;
2934 struct sk_buff *skb;
2935
2936 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2937 return NULL;
2938
2939 sdata = vif_to_sdata(vif);
2940 ifmgd = &sdata->u.mgd;
2941 local = sdata->local;
2942
2943 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
Joe Perchesd15b8452011-08-29 14:17:31 -07002944 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02002945 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07002946
Kalle Valo7044cc52010-01-05 20:16:19 +02002947 skb_reserve(skb, local->hw.extra_tx_headroom);
2948
2949 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
2950 sizeof(*nullfunc));
2951 memset(nullfunc, 0, sizeof(*nullfunc));
2952 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
2953 IEEE80211_STYPE_NULLFUNC |
2954 IEEE80211_FCTL_TODS);
2955 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
2956 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
2957 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
2958
2959 return skb;
2960}
2961EXPORT_SYMBOL(ieee80211_nullfunc_get);
2962
Kalle Valo05e54ea2010-01-05 20:16:38 +02002963struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
Johannes Berga344d672014-06-12 22:24:31 +02002964 const u8 *src_addr,
Kalle Valo05e54ea2010-01-05 20:16:38 +02002965 const u8 *ssid, size_t ssid_len,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01002966 size_t tailroom)
Kalle Valo05e54ea2010-01-05 20:16:38 +02002967{
Johannes Berga344d672014-06-12 22:24:31 +02002968 struct ieee80211_local *local = hw_to_local(hw);
Kalle Valo05e54ea2010-01-05 20:16:38 +02002969 struct ieee80211_hdr_3addr *hdr;
2970 struct sk_buff *skb;
2971 size_t ie_ssid_len;
2972 u8 *pos;
2973
Kalle Valo05e54ea2010-01-05 20:16:38 +02002974 ie_ssid_len = 2 + ssid_len;
2975
2976 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
Johannes Bergb9a9ada2012-11-29 13:00:10 +01002977 ie_ssid_len + tailroom);
Joe Perchesd15b8452011-08-29 14:17:31 -07002978 if (!skb)
Kalle Valo05e54ea2010-01-05 20:16:38 +02002979 return NULL;
Kalle Valo05e54ea2010-01-05 20:16:38 +02002980
2981 skb_reserve(skb, local->hw.extra_tx_headroom);
2982
2983 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
2984 memset(hdr, 0, sizeof(*hdr));
2985 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2986 IEEE80211_STYPE_PROBE_REQ);
Johannes Berge83e6542012-07-13 16:23:07 +02002987 eth_broadcast_addr(hdr->addr1);
Johannes Berga344d672014-06-12 22:24:31 +02002988 memcpy(hdr->addr2, src_addr, ETH_ALEN);
Johannes Berge83e6542012-07-13 16:23:07 +02002989 eth_broadcast_addr(hdr->addr3);
Kalle Valo05e54ea2010-01-05 20:16:38 +02002990
2991 pos = skb_put(skb, ie_ssid_len);
2992 *pos++ = WLAN_EID_SSID;
2993 *pos++ = ssid_len;
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02002994 if (ssid_len)
Kalle Valo05e54ea2010-01-05 20:16:38 +02002995 memcpy(pos, ssid, ssid_len);
2996 pos += ssid_len;
2997
Kalle Valo05e54ea2010-01-05 20:16:38 +02002998 return skb;
2999}
3000EXPORT_SYMBOL(ieee80211_probereq_get);
3001
Johannes Berg32bfd352007-12-19 01:31:26 +01003002void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02003003 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02003004 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02003005 struct ieee80211_rts *rts)
3006{
3007 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02003008
Harvey Harrison065e96052008-06-22 16:45:27 -07003009 rts->frame_control =
3010 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01003011 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
3012 frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02003013 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
3014 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
3015}
3016EXPORT_SYMBOL(ieee80211_rts_get);
3017
Johannes Berg32bfd352007-12-19 01:31:26 +01003018void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02003019 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02003020 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02003021 struct ieee80211_cts *cts)
3022{
3023 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02003024
Harvey Harrison065e96052008-06-22 16:45:27 -07003025 cts->frame_control =
3026 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01003027 cts->duration = ieee80211_ctstoself_duration(hw, vif,
3028 frame_len, frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02003029 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
3030}
3031EXPORT_SYMBOL(ieee80211_ctstoself_get);
3032
3033struct sk_buff *
Johannes Berg32bfd352007-12-19 01:31:26 +01003034ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +02003035 struct ieee80211_vif *vif)
Johannes Berge2ebc742007-07-27 15:43:22 +02003036{
3037 struct ieee80211_local *local = hw_to_local(hw);
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003038 struct sk_buff *skb = NULL;
Johannes Berg5cf121c2008-02-25 16:27:43 +01003039 struct ieee80211_tx_data tx;
Johannes Berge2ebc742007-07-27 15:43:22 +02003040 struct ieee80211_sub_if_data *sdata;
Marco Porschd012a602012-10-10 12:39:50 -07003041 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +02003042 struct ieee80211_tx_info *info;
Johannes Berg55de9082012-07-26 17:24:39 +02003043 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02003044
Johannes Berg32bfd352007-12-19 01:31:26 +01003045 sdata = vif_to_sdata(vif);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003046
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003047 rcu_read_lock();
Johannes Berg55de9082012-07-26 17:24:39 +02003048 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003049
Marco Porschd012a602012-10-10 12:39:50 -07003050 if (!chanctx_conf)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003051 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003052
Marco Porschd012a602012-10-10 12:39:50 -07003053 if (sdata->vif.type == NL80211_IFTYPE_AP) {
3054 struct beacon_data *beacon =
3055 rcu_dereference(sdata->u.ap.beacon);
3056
3057 if (!beacon || !beacon->head)
3058 goto out;
3059
3060 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +01003061 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3062 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -07003063 } else {
3064 goto out;
3065 }
3066
3067 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003068 goto out; /* send buffered bc/mc only after DTIM beacon */
Johannes Berge039fa42008-05-15 12:55:29 +02003069
Johannes Berge2ebc742007-07-27 15:43:22 +02003070 while (1) {
Marco Porschd012a602012-10-10 12:39:50 -07003071 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +02003072 if (!skb)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003073 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02003074 local->total_ps_buffered--;
3075
Marco Porschd012a602012-10-10 12:39:50 -07003076 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003077 struct ieee80211_hdr *hdr =
3078 (struct ieee80211_hdr *) skb->data;
3079 /* more buffered multicast/broadcast frames ==> set
3080 * MoreData flag in IEEE 802.11 header to inform PS
3081 * STAs */
3082 hdr->frame_control |=
3083 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
3084 }
3085
Michael Braun112c44b2014-03-06 15:08:43 +01003086 if (sdata->vif.type == NL80211_IFTYPE_AP)
Marco Porsch7cbf9d02013-03-01 16:01:18 +01003087 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003088 if (!ieee80211_tx_prepare(sdata, &tx, skb))
Johannes Berge2ebc742007-07-27 15:43:22 +02003089 break;
3090 dev_kfree_skb_any(skb);
3091 }
Johannes Berge039fa42008-05-15 12:55:29 +02003092
3093 info = IEEE80211_SKB_CB(skb);
3094
Johannes Berg5cf121c2008-02-25 16:27:43 +01003095 tx.flags |= IEEE80211_TX_PS_BUFFERED;
Johannes Berg4bf88532012-11-09 11:39:59 +01003096 info->band = chanctx_conf->def.chan->band;
Johannes Berge2ebc742007-07-27 15:43:22 +02003097
Johannes Berg97b045d2008-06-20 01:22:30 +02003098 if (invoke_tx_handlers(&tx))
Johannes Berge2ebc742007-07-27 15:43:22 +02003099 skb = NULL;
Johannes Berg97b045d2008-06-20 01:22:30 +02003100 out:
Johannes Bergd0709a62008-02-25 16:27:46 +01003101 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003102
3103 return skb;
3104}
3105EXPORT_SYMBOL(ieee80211_get_buffered_bc);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003106
Liad Kaufmanb6da9112014-11-19 13:47:38 +02003107int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
3108{
3109 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
3110 struct ieee80211_sub_if_data *sdata = sta->sdata;
3111 struct ieee80211_local *local = sdata->local;
3112 int ret;
3113 u32 queues;
3114
3115 lockdep_assert_held(&local->sta_mtx);
3116
3117 /* only some cases are supported right now */
3118 switch (sdata->vif.type) {
3119 case NL80211_IFTYPE_STATION:
3120 case NL80211_IFTYPE_AP:
3121 case NL80211_IFTYPE_AP_VLAN:
3122 break;
3123 default:
3124 WARN_ON(1);
3125 return -EINVAL;
3126 }
3127
3128 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
3129 return -EINVAL;
3130
3131 if (sta->reserved_tid == tid) {
3132 ret = 0;
3133 goto out;
3134 }
3135
3136 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
3137 sdata_err(sdata, "TID reservation already active\n");
3138 ret = -EALREADY;
3139 goto out;
3140 }
3141
3142 ieee80211_stop_vif_queues(sdata->local, sdata,
3143 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
3144
3145 synchronize_net();
3146
3147 /* Tear down BA sessions so we stop aggregating on this TID */
3148 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) {
3149 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
3150 __ieee80211_stop_tx_ba_session(sta, tid,
3151 AGG_STOP_LOCAL_REQUEST);
3152 }
3153
3154 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3155 __ieee80211_flush_queues(local, sdata, queues);
3156
3157 sta->reserved_tid = tid;
3158
3159 ieee80211_wake_vif_queues(local, sdata,
3160 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
3161
3162 if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
3163 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
3164
3165 ret = 0;
3166 out:
3167 return ret;
3168}
3169EXPORT_SYMBOL(ieee80211_reserve_tid);
3170
3171void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
3172{
3173 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
3174 struct ieee80211_sub_if_data *sdata = sta->sdata;
3175
3176 lockdep_assert_held(&sdata->local->sta_mtx);
3177
3178 /* only some cases are supported right now */
3179 switch (sdata->vif.type) {
3180 case NL80211_IFTYPE_STATION:
3181 case NL80211_IFTYPE_AP:
3182 case NL80211_IFTYPE_AP_VLAN:
3183 break;
3184 default:
3185 WARN_ON(1);
3186 return;
3187 }
3188
3189 if (tid != sta->reserved_tid) {
3190 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
3191 return;
3192 }
3193
3194 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
3195}
3196EXPORT_SYMBOL(ieee80211_unreserve_tid);
3197
Johannes Berg55de9082012-07-26 17:24:39 +02003198void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
3199 struct sk_buff *skb, int tid,
3200 enum ieee80211_band band)
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003201{
Christian Lamparter353d09c2012-07-07 15:07:13 +02003202 int ac = ieee802_1d_to_ac[tid & 7];
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003203
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003204 skb_set_mac_header(skb, 0);
3205 skb_set_network_header(skb, 0);
3206 skb_set_transport_header(skb, 0);
3207
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003208 skb_set_queue_mapping(skb, ac);
Helmut Schaacf6bb792011-12-15 10:18:34 +01003209 skb->priority = tid;
Johannes Bergcf0277e2010-01-05 18:00:58 +01003210
Johannes Berg89afe612013-02-13 15:39:57 +01003211 skb->dev = sdata->dev;
3212
Johannes Berg3d34deb2009-06-18 17:25:11 +02003213 /*
3214 * The other path calling ieee80211_xmit is from the tasklet,
3215 * and while we can handle concurrent transmissions locking
3216 * requirements are that we do not come into tx with bhs on.
3217 */
3218 local_bh_disable();
Johannes Berg73c4e192014-11-09 18:50:09 +02003219 IEEE80211_SKB_CB(skb)->band = band;
3220 ieee80211_xmit(sdata, skb);
Johannes Berg3d34deb2009-06-18 17:25:11 +02003221 local_bh_enable();
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003222}