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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>
Michael Braunebceec82016-11-22 11:52:18 +010019#include <linux/if_vlan.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020020#include <linux/etherdevice.h>
21#include <linux/bitmap.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040022#include <linux/rcupdate.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040023#include <linux/export.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>
Michal Kazior5caa3282016-05-19 10:37:51 +020028#include <net/codel.h>
29#include <net/codel_impl.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020030#include <asm/unaligned.h>
Michal Kaziorfa962b92016-05-19 10:37:49 +020031#include <net/fq_impl.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020032
33#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020034#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040035#include "led.h"
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +010036#include "mesh.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020037#include "wep.h"
38#include "wpa.h"
39#include "wme.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040040#include "rate.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020041
Johannes Berge2ebc742007-07-27 15:43:22 +020042/* misc utils */
43
Johannes Berg5a490512015-04-22 17:10:38 +020044static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
45{
46 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
47
48 u64_stats_update_begin(&tstats->syncp);
49 tstats->tx_packets++;
50 tstats->tx_bytes += len;
51 u64_stats_update_end(&tstats->syncp);
52}
53
Johannes Berg252b86c2011-11-16 15:28:55 +010054static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
55 struct sk_buff *skb, int group_addr,
Johannes Berg03f93c32008-06-25 14:36:27 +030056 int next_frag_len)
Johannes Berge2ebc742007-07-27 15:43:22 +020057{
Simon Wunderlich2103dec2013-07-08 16:55:53 +020058 int rate, mrate, erp, dur, i, shift = 0;
Johannes Berg2e92e6f2008-05-15 12:55:27 +020059 struct ieee80211_rate *txrate;
Johannes Berge2ebc742007-07-27 15:43:22 +020060 struct ieee80211_local *local = tx->local;
Johannes Berg8318d782008-01-24 19:38:38 +010061 struct ieee80211_supported_band *sband;
Harvey Harrison358c8d92008-07-15 18:44:13 -070062 struct ieee80211_hdr *hdr;
Johannes Berg252b86c2011-11-16 15:28:55 +010063 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Simon Wunderlich2103dec2013-07-08 16:55:53 +020064 struct ieee80211_chanctx_conf *chanctx_conf;
65 u32 rate_flags = 0;
66
Felix Fietkau95cd4702016-12-14 20:46:57 +010067 /* assume HW handles this */
68 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
69 return 0;
70
Simon Wunderlich2103dec2013-07-08 16:55:53 +020071 rcu_read_lock();
72 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
73 if (chanctx_conf) {
74 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
75 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
76 }
77 rcu_read_unlock();
Johannes Berge6a98542008-10-21 12:40:02 +020078
Johannes Berge6a98542008-10-21 12:40:02 +020079 /* uh huh? */
Felix Fietkau0d528d82013-04-22 16:14:41 +020080 if (WARN_ON_ONCE(tx->rate.idx < 0))
Johannes Berge6a98542008-10-21 12:40:02 +020081 return 0;
Johannes Berge2ebc742007-07-27 15:43:22 +020082
Johannes Berg2d565772012-07-23 15:12:51 +020083 sband = local->hw.wiphy->bands[info->band];
Felix Fietkau0d528d82013-04-22 16:14:41 +020084 txrate = &sband->bitrates[tx->rate.idx];
Johannes Berg8318d782008-01-24 19:38:38 +010085
Johannes Berge6a98542008-10-21 12:40:02 +020086 erp = txrate->flags & IEEE80211_RATE_ERP_G;
Johannes Berge2ebc742007-07-27 15:43:22 +020087
88 /*
89 * data and mgmt (except PS Poll):
90 * - during CFP: 32768
91 * - during contention period:
92 * if addr1 is group address: 0
93 * if more fragments = 0 and addr1 is individual address: time to
94 * transmit one ACK plus SIFS
95 * if more fragments = 1 and addr1 is individual address: time to
96 * transmit next fragment plus 2 x ACK plus 3 x SIFS
97 *
98 * IEEE 802.11, 9.6:
99 * - control response frame (CTS or ACK) shall be transmitted using the
100 * same rate as the immediately previous frame in the frame exchange
101 * sequence, if this rate belongs to the PHY mandatory rates, or else
102 * at the highest possible rate belonging to the PHY rates in the
103 * BSSBasicRateSet
104 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100105 hdr = (struct ieee80211_hdr *)skb->data;
Harvey Harrison358c8d92008-07-15 18:44:13 -0700106 if (ieee80211_is_ctl(hdr->frame_control)) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200107 /* TODO: These control frames are not currently sent by
Johannes Bergccd7b362008-09-11 00:01:56 +0200108 * mac80211, but should they be implemented, this function
Johannes Berge2ebc742007-07-27 15:43:22 +0200109 * needs to be updated to support duration field calculation.
110 *
111 * RTS: time needed to transmit pending data/mgmt frame plus
112 * one CTS frame plus one ACK frame plus 3 x SIFS
113 * CTS: duration of immediately previous RTS minus time
114 * required to transmit CTS and its SIFS
115 * ACK: 0 if immediately previous directed data/mgmt had
116 * more=0, with more=1 duration in ACK frame is duration
117 * from previous frame minus time needed to transmit ACK
118 * and its SIFS
119 * PS Poll: BIT(15) | BIT(14) | aid
120 */
121 return 0;
122 }
123
124 /* data/mgmt */
125 if (0 /* FIX: data/mgmt during CFP */)
Johannes Berg03f93c32008-06-25 14:36:27 +0300126 return cpu_to_le16(32768);
Johannes Berge2ebc742007-07-27 15:43:22 +0200127
128 if (group_addr) /* Group address as the destination - no ACK */
129 return 0;
130
131 /* Individual destination address:
132 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
133 * CTS and ACK frames shall be transmitted using the highest rate in
134 * basic rate set that is less than or equal to the rate of the
135 * immediately previous frame and that is using the same modulation
136 * (CCK or OFDM). If no basic rate set matches with these requirements,
137 * the highest mandatory rate of the PHY that is less than or equal to
138 * the rate of the previous frame is used.
139 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
140 */
141 rate = -1;
Johannes Berg8318d782008-01-24 19:38:38 +0100142 /* use lowest available if everything fails */
143 mrate = sband->bitrates[0].bitrate;
144 for (i = 0; i < sband->n_bitrates; i++) {
145 struct ieee80211_rate *r = &sband->bitrates[i];
146
147 if (r->bitrate > txrate->bitrate)
Johannes Berge2ebc742007-07-27 15:43:22 +0200148 break;
149
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200150 if ((rate_flags & r->flags) != rate_flags)
151 continue;
152
Johannes Bergbda39332008-10-11 01:51:51 +0200153 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200154 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200155
Johannes Berg8318d782008-01-24 19:38:38 +0100156 switch (sband->band) {
Johannes Berg57fbcce2016-04-12 15:56:15 +0200157 case NL80211_BAND_2GHZ: {
Johannes Berg8318d782008-01-24 19:38:38 +0100158 u32 flag;
159 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
160 flag = IEEE80211_RATE_MANDATORY_G;
161 else
162 flag = IEEE80211_RATE_MANDATORY_B;
163 if (r->flags & flag)
164 mrate = r->bitrate;
165 break;
166 }
Johannes Berg57fbcce2016-04-12 15:56:15 +0200167 case NL80211_BAND_5GHZ:
Johannes Berg8318d782008-01-24 19:38:38 +0100168 if (r->flags & IEEE80211_RATE_MANDATORY_A)
169 mrate = r->bitrate;
170 break;
Johannes Berg57fbcce2016-04-12 15:56:15 +0200171 case NL80211_BAND_60GHZ:
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300172 /* TODO, for now fall through */
Johannes Berg57fbcce2016-04-12 15:56:15 +0200173 case NUM_NL80211_BANDS:
Johannes Berg8318d782008-01-24 19:38:38 +0100174 WARN_ON(1);
175 break;
176 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200177 }
178 if (rate == -1) {
179 /* No matching basic rate found; use highest suitable mandatory
180 * PHY rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200181 rate = DIV_ROUND_UP(mrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200182 }
183
Simon Wunderlich6674f212011-11-21 21:34:30 +0100184 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
185 if (ieee80211_is_data_qos(hdr->frame_control) &&
Claudio Pisac26a0e12012-05-28 13:06:25 +0100186 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
Simon Wunderlich6674f212011-11-21 21:34:30 +0100187 dur = 0;
188 else
189 /* Time needed to transmit ACK
190 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
191 * to closest integer */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200192 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200193 tx->sdata->vif.bss_conf.use_short_preamble,
194 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200195
196 if (next_frag_len) {
197 /* Frame is fragmented: duration increases with time needed to
198 * transmit next fragment plus ACK and 2 x SIFS. */
199 dur *= 2; /* ACK + SIFS */
200 /* next fragment */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200201 dur += ieee80211_frame_duration(sband->band, next_frag_len,
Johannes Berg8318d782008-01-24 19:38:38 +0100202 txrate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200203 tx->sdata->vif.bss_conf.use_short_preamble,
204 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200205 }
206
Johannes Berg03f93c32008-06-25 14:36:27 +0300207 return cpu_to_le16(dur);
Johannes Berge2ebc742007-07-27 15:43:22 +0200208}
209
Johannes Berge2ebc742007-07-27 15:43:22 +0200210/* tx handlers */
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200211static ieee80211_tx_result debug_noinline
212ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
213{
214 struct ieee80211_local *local = tx->local;
Kalle Valo0c742112010-01-12 10:42:53 +0200215 struct ieee80211_if_managed *ifmgd;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200216
217 /* driver doesn't support power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200218 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200219 return TX_CONTINUE;
220
221 /* hardware does dynamic power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200222 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200223 return TX_CONTINUE;
224
225 /* dynamic power save disabled */
226 if (local->hw.conf.dynamic_ps_timeout <= 0)
227 return TX_CONTINUE;
228
229 /* we are scanning, don't enable power save */
230 if (local->scanning)
231 return TX_CONTINUE;
232
233 if (!local->ps_sdata)
234 return TX_CONTINUE;
235
236 /* No point if we're going to suspend */
237 if (local->quiescing)
238 return TX_CONTINUE;
239
Kalle Valo0c742112010-01-12 10:42:53 +0200240 /* dynamic ps is supported only in managed mode */
241 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
242 return TX_CONTINUE;
243
244 ifmgd = &tx->sdata->u.mgd;
245
246 /*
247 * Don't wakeup from power save if u-apsd is enabled, voip ac has
248 * u-apsd enabled and the frame is in voip class. This effectively
249 * means that even if all access categories have u-apsd enabled, in
250 * practise u-apsd is only used with the voip ac. This is a
251 * workaround for the case when received voip class packets do not
252 * have correct qos tag for some reason, due the network or the
253 * peer application.
254 *
Eliad Pellerdc41e4d2012-03-14 16:15:03 +0200255 * Note: ifmgd->uapsd_queues access is racy here. If the value is
Kalle Valo0c742112010-01-12 10:42:53 +0200256 * changed via debugfs, user needs to reassociate manually to have
257 * everything in sync.
258 */
Johannes Berg4875d30d2012-03-27 14:18:37 +0200259 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
260 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
261 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
Kalle Valo0c742112010-01-12 10:42:53 +0200262 return TX_CONTINUE;
263
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200264 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
265 ieee80211_stop_queues_by_reason(&local->hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100266 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300267 IEEE80211_QUEUE_STOP_REASON_PS,
268 false);
Vivek Natarajandb285692011-02-18 17:18:03 +0530269 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200270 ieee80211_queue_work(&local->hw,
271 &local->dynamic_ps_disable_work);
272 }
273
Luciano Coelho5db1c072011-05-03 21:40:08 +0300274 /* Don't restart the timer if we're not disassociated */
275 if (!ifmgd->associated)
276 return TX_CONTINUE;
277
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200278 mod_timer(&local->dynamic_ps_timer, jiffies +
279 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
280
281 return TX_CONTINUE;
282}
Johannes Berge2ebc742007-07-27 15:43:22 +0200283
Johannes Bergd9e8a702008-06-30 15:10:44 +0200284static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100285ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200286{
Harvey Harrison358c8d92008-07-15 18:44:13 -0700287
Johannes Berge039fa42008-05-15 12:55:29 +0200288 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Berge039fa42008-05-15 12:55:29 +0200289 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200290 bool assoc = false;
Johannes Berge2ebc742007-07-27 15:43:22 +0200291
Johannes Berge039fa42008-05-15 12:55:29 +0200292 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100293 return TX_CONTINUE;
Johannes Berg58d41852007-09-26 17:53:18 +0200294
Ben Greearb23b0252011-02-04 11:54:17 -0800295 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
296 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
Kalle Valoa9a6fff2009-03-18 14:06:44 +0200297 !ieee80211_is_probe_req(hdr->frame_control) &&
298 !ieee80211_is_nullfunc(hdr->frame_control))
299 /*
300 * When software scanning only nullfunc frames (to notify
301 * the sleep state to the AP) and probe requests (for the
302 * active scan) are allowed, all other frames should not be
303 * sent and we should not get here, but if we do
304 * nonetheless, drop them to avoid sending them
305 * off-channel. See the link below and
306 * ieee80211_start_scan() for more.
307 *
308 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
309 */
Johannes Berg9ae54c82008-01-31 19:48:20 +0100310 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200311
Rostislav Lisovy239281f2014-11-03 10:33:19 +0100312 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
313 return TX_CONTINUE;
314
Bill Jordan1be7fe82010-10-01 11:20:41 -0400315 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
316 return TX_CONTINUE;
317
Johannes Berg5cf121c2008-02-25 16:27:43 +0100318 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
Johannes Berg9ae54c82008-01-31 19:48:20 +0100319 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200320
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200321 if (tx->sta)
322 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge2ebc742007-07-27 15:43:22 +0200323
Johannes Berg5cf121c2008-02-25 16:27:43 +0100324 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200325 if (unlikely(!assoc &&
Harvey Harrison358c8d92008-07-15 18:44:13 -0700326 ieee80211_is_data(hdr->frame_control))) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200327#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200328 sdata_info(tx->sdata,
329 "dropped data frame to not associated station %pM\n",
330 hdr->addr1);
331#endif
Johannes Berge2ebc742007-07-27 15:43:22 +0200332 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
Johannes Berg9ae54c82008-01-31 19:48:20 +0100333 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200334 }
Michael Braun72f15d52016-10-10 19:12:21 +0200335 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
336 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
Johannes Berg29623892011-12-14 12:20:31 +0100337 /*
338 * No associated STAs - no need to send multicast
339 * frames.
340 */
341 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200342 }
343
Johannes Berg9ae54c82008-01-31 19:48:20 +0100344 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200345}
346
Johannes Berge2ebc742007-07-27 15:43:22 +0200347/* This function is called whenever the AP is about to exceed the maximum limit
348 * of buffered frames for power saving STAs. This situation should not really
349 * happen often during normal operation, so dropping the oldest buffered packet
350 * from each queue should be OK to make some room for new frames. */
351static void purge_old_ps_buffers(struct ieee80211_local *local)
352{
353 int total = 0, purged = 0;
354 struct sk_buff *skb;
355 struct ieee80211_sub_if_data *sdata;
356 struct sta_info *sta;
357
Johannes Berg79010422007-09-18 17:29:21 -0400358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Marco Porschd012a602012-10-10 12:39:50 -0700359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700365 else
Johannes Berge2ebc742007-07-27 15:43:22 +0200366 continue;
Marco Porschd012a602012-10-10 12:39:50 -0700367
368 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200369 if (skb) {
370 purged++;
Felix Fietkau6b07d9c2016-08-02 11:13:41 +0200371 ieee80211_free_txskb(&local->hw, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +0200372 }
Marco Porschd012a602012-10-10 12:39:50 -0700373 total += skb_queue_len(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200374 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200375
Johannes Berg948d8872011-09-29 16:04:29 +0200376 /*
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
379 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
Johannes Berg948d8872011-09-29 16:04:29 +0200381 int ac;
382
383 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
384 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
385 total += skb_queue_len(&sta->ps_tx_buf[ac]);
386 if (skb) {
387 purged++;
Felix Fietkauc3e77242012-10-08 14:39:33 +0200388 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg948d8872011-09-29 16:04:29 +0200389 break;
390 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200391 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200392 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100393
Johannes Berge2ebc742007-07-27 15:43:22 +0200394 local->total_ps_buffered = total;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
Johannes Berge2ebc742007-07-27 15:43:22 +0200396}
397
Johannes Berg9ae54c82008-01-31 19:48:20 +0100398static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200400{
Johannes Berge039fa42008-05-15 12:55:29 +0200401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Marco Porschd012a602012-10-10 12:39:50 -0700403 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +0200404
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100405 /*
406 * broadcast/multicast frame
407 *
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100408 * If any of the associated/peer stations is in power save mode,
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
411 */
412
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
Marco Porschd012a602012-10-10 12:39:50 -0700414 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
415 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
416 if (!tx->sdata->bss)
417 return TX_CONTINUE;
418
419 ps = &tx->sdata->bss->ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700422 } else {
Johannes Berg3e122be2008-07-09 14:40:34 +0200423 return TX_CONTINUE;
Marco Porschd012a602012-10-10 12:39:50 -0700424 }
425
Johannes Berg3e122be2008-07-09 14:40:34 +0200426
427 /* no buffering for ordered frames */
Harvey Harrison358c8d92008-07-15 18:44:13 -0700428 if (ieee80211_has_order(hdr->frame_control))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100429 return TX_CONTINUE;
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100430
Johannes Berg08b99392014-07-07 12:01:11 +0200431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
Johannes Berg30686bf2015-06-02 21:39:54 +0200434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
Johannes Bergf4d57942013-05-28 17:24:15 +0200435 info->hw_queue = tx->sdata->vif.cab_queue;
436
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100437 /* no stations in PS mode */
Marco Porschd012a602012-10-10 12:39:50 -0700438 if (!atomic_read(&ps->num_sta_ps))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100439 return TX_CONTINUE;
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100440
Johannes Berg62b517c2009-10-29 12:19:21 +0100441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
Johannes Berg62b12082009-08-10 16:04:15 +0200442
Johannes Berg62b517c2009-10-29 12:19:21 +0100443 /* device releases frame after DTIM beacon */
Johannes Berg30686bf2015-06-02 21:39:54 +0200444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
Johannes Berg62b12082009-08-10 16:04:15 +0200445 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200446
Johannes Berg62b12082009-08-10 16:04:15 +0200447 /* buffered in mac80211 */
448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100450
Marco Porschd012a602012-10-10 12:39:50 -0700451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
Felix Fietkau6b07d9c2016-08-02 11:13:41 +0200454 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
Johannes Berg62b12082009-08-10 16:04:15 +0200455 } else
456 tx->local->total_ps_buffered++;
457
Marco Porschd012a602012-10-10 12:39:50 -0700458 skb_queue_tail(&ps->bc_buf, tx->skb);
Johannes Berg62b12082009-08-10 16:04:15 +0200459
460 return TX_QUEUED;
Johannes Berge2ebc742007-07-27 15:43:22 +0200461}
462
Jouni Malinenfb733332009-01-08 13:32:00 +0200463static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
464 struct sk_buff *skb)
465{
466 if (!ieee80211_is_mgmt(fc))
467 return 0;
468
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
Jouni Malinenfb733332009-01-08 13:32:00 +0200470 return 0;
471
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100472 if (!ieee80211_is_robust_mgmt_frame(skb))
Jouni Malinenfb733332009-01-08 13:32:00 +0200473 return 0;
474
475 return 1;
476}
477
Johannes Berg9ae54c82008-01-31 19:48:20 +0100478static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200480{
481 struct sta_info *sta = tx->sta;
Johannes Berge039fa42008-05-15 12:55:29 +0200482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg08b99392014-07-07 12:01:11 +0200483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300484 struct ieee80211_local *local = tx->local;
Johannes Berge2ebc742007-07-27 15:43:22 +0200485
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100486 if (unlikely(!sta))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100487 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200488
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
Johannes Berg5ac2e352014-05-27 16:32:27 +0200490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
Johannes Berg948d8872011-09-29 16:04:29 +0200493 int ac = skb_get_queue_mapping(tx->skb);
494
Johannes Berg08b99392014-07-07 12:01:11 +0200495 if (ieee80211_is_mgmt(hdr->frame_control) &&
496 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
497 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
498 return TX_CONTINUE;
499 }
500
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
Johannes Berge2ebc742007-07-27 15:43:22 +0200503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200505
506 /* sync with ieee80211_sta_ps_deliver_wakeup */
507 spin_lock(&sta->ps_lock);
508 /*
509 * STA woke up the meantime and all the frames on ps_tx_buf have
510 * been queued to pending queue. No reordering can happen, go
511 * ahead and Tx the packet.
512 */
513 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Berg5ac2e352014-05-27 16:32:27 +0200514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
Johannes Berg948d8872011-09-29 16:04:29 +0200520 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
521 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
Felix Fietkauc3e77242012-10-08 14:39:33 +0200525 ieee80211_free_txskb(&local->hw, old);
Johannes Berge2ebc742007-07-27 15:43:22 +0200526 } else
527 tx->local->total_ps_buffered++;
Johannes Berg004c8722008-02-20 11:21:35 +0100528
Johannes Berge039fa42008-05-15 12:55:29 +0200529 info->control.jiffies = jiffies;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200530 info->control.vif = &tx->sdata->vif;
Johannes Berg8f77f382009-06-07 21:58:37 +0200531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Johannes Berg03c8c062014-01-09 01:45:28 +0100532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berg948d8872011-09-29 16:04:29 +0200533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200534 spin_unlock(&sta->ps_lock);
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
Johannes Bergc868cb352011-09-29 16:04:27 +0200541 /*
542 * We queued up some frames, so the TIM bit might
543 * need to be set, recalculate it.
544 */
545 sta_info_recalc_tim(sta);
546
Johannes Berg9ae54c82008-01-31 19:48:20 +0100547 return TX_QUEUED;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200548 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
549 ps_dbg(tx->sdata,
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 sta->sta.addr);
Johannes Berge2ebc742007-07-27 15:43:22 +0200552 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200553
Johannes Berg9ae54c82008-01-31 19:48:20 +0100554 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200555}
556
Johannes Bergd9e8a702008-06-30 15:10:44 +0200557static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200559{
Johannes Berg5cf121c2008-02-25 16:27:43 +0100560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100561 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200562
Johannes Berg5cf121c2008-02-25 16:27:43 +0100563 if (tx->flags & IEEE80211_TX_UNICAST)
Johannes Berge2ebc742007-07-27 15:43:22 +0200564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
Johannes Bergd9e8a702008-06-30 15:10:44 +0200569static ieee80211_tx_result debug_noinline
Johannes Berga621fa42010-08-27 14:26:54 +0300570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
Johannes Bergaf61a162013-07-02 18:09:12 +0200574 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
575 if (tx->sdata->control_port_no_encrypt)
576 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
577 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
Jouni Malinen9c1c98a2015-02-26 15:50:50 +0200578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
Johannes Bergaf61a162013-07-02 18:09:12 +0200579 }
Johannes Berga621fa42010-08-27 14:26:54 +0300580
581 return TX_CONTINUE;
582}
583
584static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200586{
Johannes Berg46e6de12012-07-04 18:10:07 +0200587 struct ieee80211_key *key;
Johannes Berge039fa42008-05-15 12:55:29 +0200588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergd4e46a32007-09-14 11:10:24 -0400590
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
Johannes Berge2ebc742007-07-27 15:43:22 +0200592 tx->key = NULL;
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400595 tx->key = key;
Masashi Honma46f6b062016-06-22 19:55:20 +0900596 else if (ieee80211_is_group_privacy_action(tx->skb) &&
597 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 tx->key = key;
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200599 else if (ieee80211_is_mgmt(hdr->frame_control) &&
Jouni Malinenecbcd322010-03-29 23:35:23 -0700600 is_multicast_ether_addr(hdr->addr1) &&
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100601 ieee80211_is_robust_mgmt_frame(tx->skb) &&
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200602 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 tx->key = key;
Johannes Bergf7e01042010-12-09 19:49:02 +0100604 else if (is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 tx->key = key;
607 else if (!is_multicast_ether_addr(hdr->addr1) &&
608 (key = rcu_dereference(tx->sdata->default_unicast_key)))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400609 tx->key = key;
Johannes Berge8f4fb72015-03-20 11:37:36 +0100610 else
Johannes Berg46e6de12012-07-04 18:10:07 +0200611 tx->key = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +0200612
613 if (tx->key) {
Johannes Berg813d7662010-01-17 01:47:58 +0100614 bool skip_hw = false;
615
Johannes Berg011bfcc2007-09-17 01:29:25 -0400616 /* TODO: add threshold stuff again */
Johannes Berg176e4f82007-12-18 15:27:47 +0100617
Johannes Berg97359d12010-08-10 09:46:38 +0200618 switch (tx->key->conf.cipher) {
619 case WLAN_CIPHER_SUITE_WEP40:
620 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berg97359d12010-08-10 09:46:38 +0200621 case WLAN_CIPHER_SUITE_TKIP:
Harvey Harrison358c8d92008-07-15 18:44:13 -0700622 if (!ieee80211_is_data_present(hdr->frame_control))
Johannes Berg176e4f82007-12-18 15:27:47 +0100623 tx->key = NULL;
624 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200625 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +0200626 case WLAN_CIPHER_SUITE_CCMP_256:
Jouni Malinen00b9cfa2015-01-24 19:52:06 +0200627 case WLAN_CIPHER_SUITE_GCMP:
628 case WLAN_CIPHER_SUITE_GCMP_256:
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,
Masashi Honma46f6b062016-06-22 19:55:20 +0900631 tx->skb) &&
632 !ieee80211_is_group_privacy_action(tx->skb))
Jouni Malinenfb733332009-01-08 13:32:00 +0200633 tx->key = NULL;
Kalle Valo3b43a182010-01-23 20:27:14 +0200634 else
635 skip_hw = (tx->key->conf.flags &
Johannes Berge548c492012-09-04 17:08:23 +0200636 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
Kalle Valo3b43a182010-01-23 20:27:14 +0200637 ieee80211_is_mgmt(hdr->frame_control);
Jouni Malinenfb733332009-01-08 13:32:00 +0200638 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200639 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen56c52da2015-01-24 19:52:08 +0200640 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
Jouni Malinen8ade5382015-01-24 19:52:09 +0200641 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200643 if (!ieee80211_is_mgmt(hdr->frame_control))
644 tx->key = NULL;
645 break;
Johannes Berg176e4f82007-12-18 15:27:47 +0100646 }
Johannes Berg813d7662010-01-17 01:47:58 +0100647
Johannes Berge54faf22013-01-29 11:41:38 +0100648 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
649 !ieee80211_is_deauth(hdr->frame_control)))
Johannes Berg95acac62011-07-12 12:30:59 +0200650 return TX_DROP;
651
Johannes Bergf12553e2010-01-22 22:07:59 +0100652 if (!skip_hw && tx->key &&
Johannes Berg382b1652010-01-25 11:36:16 +0100653 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
Johannes Berg813d7662010-01-17 01:47:58 +0100654 info->control.hw_key = &tx->key->conf;
Johannes Berge2ebc742007-07-27 15:43:22 +0200655 }
656
Johannes Berg9ae54c82008-01-31 19:48:20 +0100657 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200658}
659
Johannes Bergd9e8a702008-06-30 15:10:44 +0200660static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200662{
Johannes Berge039fa42008-05-15 12:55:29 +0200663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700666 u32 len;
Johannes Berge6a98542008-10-21 12:40:02 +0200667 struct ieee80211_tx_rate_control txrc;
Felix Fietkau0d528d82013-04-22 16:14:41 +0200668 struct ieee80211_sta_rates *ratetbl = NULL;
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200669 bool assoc = false;
Johannes Berge6a98542008-10-21 12:40:02 +0200670
671 memset(&txrc, 0, sizeof(txrc));
Johannes Berg8318d782008-01-24 19:38:38 +0100672
Johannes Berg2d565772012-07-23 15:12:51 +0200673 sband = tx->local->hw.wiphy->bands[info->band];
Johannes Berge2ebc742007-07-27 15:43:22 +0200674
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700675 len = min_t(u32, tx->skb->len + FCS_LEN,
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200676 tx->local->hw.wiphy->frag_threshold);
Johannes Berg58d41852007-09-26 17:53:18 +0200677
Johannes Berge6a98542008-10-21 12:40:02 +0200678 /* set up the tx rate control struct we give the RC algo */
Johannes Berg005e4722012-02-26 11:24:35 +0100679 txrc.hw = &tx->local->hw;
Johannes Berge6a98542008-10-21 12:40:02 +0200680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
Johannes Berg2d565772012-07-23 15:12:51 +0200684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
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 ||
Bertold Van den Bergh5765f9f2015-08-05 16:02:28 +0200692 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
693 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
Johannes Berg58d41852007-09-26 17:53:18 +0200694
Johannes Berge6a98542008-10-21 12:40:02 +0200695 /* set up RTS protection if desired */
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200696 if (len > tx->local->hw.wiphy->rts_threshold) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200697 txrc.rts = true;
Johannes Berge2ebc742007-07-27 15:43:22 +0200698 }
Johannes Berge6a98542008-10-21 12:40:02 +0200699
Felix Fietkau0d528d82013-04-22 16:14:41 +0200700 info->control.use_rts = txrc.rts;
Felix Fietkau991fec02013-04-16 13:38:43 +0200701 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
702
Johannes Berge6a98542008-10-21 12:40:02 +0200703 /*
704 * Use short preamble if the BSS can handle it, but not for
705 * management frames unless we know the receiver can handle
706 * that -- the management frame might be to a station that
707 * just wants a probe response.
708 */
709 if (tx->sdata->vif.bss_conf.use_short_preamble &&
710 (ieee80211_is_data(hdr->frame_control) ||
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200711 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
Felix Fietkau0d528d82013-04-22 16:14:41 +0200712 txrc.short_preamble = true;
713
714 info->control.short_preamble = txrc.short_preamble;
Johannes Berge6a98542008-10-21 12:40:02 +0200715
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +0100716 /* don't ask rate control when rate already injected via radiotap */
717 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
718 return TX_CONTINUE;
719
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200720 if (tx->sta)
721 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge6a98542008-10-21 12:40:02 +0200722
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700723 /*
724 * Lets not bother rate control if we're associated and cannot
725 * talk to the sta. This should not happen.
726 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200727 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700728 !rate_usable_index_exists(sband, &tx->sta->sta),
729 "%s: Dropped data frame as no usable bitrate found while "
730 "scanning and associated. Target station: "
731 "%pM on %d GHz band\n",
Johannes Berg47846c92009-11-25 17:46:19 +0100732 tx->sdata->name, hdr->addr1,
Johannes Berg2d565772012-07-23 15:12:51 +0200733 info->band ? 5 : 2))
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700734 return TX_DROP;
735
736 /*
737 * If we're associated with the sta at this point we know we can at
738 * least send the frame at the lowest bit rate.
739 */
Johannes Berge6a98542008-10-21 12:40:02 +0200740 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
741
Felix Fietkau0d528d82013-04-22 16:14:41 +0200742 if (tx->sta && !info->control.skip_table)
743 ratetbl = rcu_dereference(tx->sta->sta.rates);
744
745 if (unlikely(info->control.rates[0].idx < 0)) {
746 if (ratetbl) {
747 struct ieee80211_tx_rate rate = {
748 .idx = ratetbl->rate[0].idx,
749 .flags = ratetbl->rate[0].flags,
750 .count = ratetbl->rate[0].count
751 };
752
753 if (ratetbl->rate[0].idx < 0)
754 return TX_DROP;
755
756 tx->rate = rate;
757 } else {
758 return TX_DROP;
759 }
760 } else {
761 tx->rate = info->control.rates[0];
762 }
Johannes Berge6a98542008-10-21 12:40:02 +0200763
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100764 if (txrc.reported_rate.idx < 0) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200765 txrc.reported_rate = tx->rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100766 if (tx->sta && ieee80211_is_data(hdr->frame_control))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200767 tx->sta->tx_stats.last_rate = txrc.reported_rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100768 } else if (tx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200769 tx->sta->tx_stats.last_rate = txrc.reported_rate;
Johannes Berge6a98542008-10-21 12:40:02 +0200770
Felix Fietkau0d528d82013-04-22 16:14:41 +0200771 if (ratetbl)
772 return TX_CONTINUE;
773
Johannes Berge6a98542008-10-21 12:40:02 +0200774 if (unlikely(!info->control.rates[0].count))
775 info->control.rates[0].count = 1;
776
Gábor Stefanik99551512009-04-23 19:36:14 +0200777 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
778 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
779 info->control.rates[0].count = 1;
780
Johannes Berg9ae54c82008-01-31 19:48:20 +0100781 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200782}
783
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100784static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
785{
786 u16 *seq = &sta->tid_seq[tid];
787 __le16 ret = cpu_to_le16(*seq);
788
789 /* Increase the sequence number. */
790 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
791
792 return ret;
793}
794
Johannes Bergd9e8a702008-06-30 15:10:44 +0200795static ieee80211_tx_result debug_noinline
Johannes Bergf591fa52008-07-10 11:21:26 +0200796ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
797{
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergf591fa52008-07-10 11:21:26 +0200800 u8 *qc;
801 int tid;
802
Johannes Berg25d834e2008-09-12 22:52:47 +0200803 /*
804 * Packet injection may want to control the sequence
805 * number, if we have no matching interface then we
806 * neither assign one ourselves nor ask the driver to.
807 */
Johannes Berg5061b0c2009-07-14 00:33:34 +0200808 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
Johannes Berg25d834e2008-09-12 22:52:47 +0200809 return TX_CONTINUE;
810
Johannes Bergf591fa52008-07-10 11:21:26 +0200811 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
812 return TX_CONTINUE;
813
814 if (ieee80211_hdrlen(hdr->frame_control) < 24)
815 return TX_CONTINUE;
816
Johannes Berg49a59542011-09-29 16:04:41 +0200817 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
818 return TX_CONTINUE;
819
Johannes Berg94778282008-10-10 13:21:59 +0200820 /*
821 * Anything but QoS data that has a sequence number field
822 * (is long enough) gets a sequence number from the global
Bob Copelandc4c205f2013-08-23 09:35:38 -0400823 * counter. QoS data frames with a multicast destination
824 * also use the global counter (802.11-2012 9.3.2.10).
Johannes Berg94778282008-10-10 13:21:59 +0200825 */
Bob Copelandc4c205f2013-08-23 09:35:38 -0400826 if (!ieee80211_is_data_qos(hdr->frame_control) ||
827 is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg94778282008-10-10 13:21:59 +0200828 /* driver should assign sequence number */
Johannes Bergf591fa52008-07-10 11:21:26 +0200829 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
Johannes Berg94778282008-10-10 13:21:59 +0200830 /* for pure STA mode without beacons, we can do it */
831 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
832 tx->sdata->sequence_number += 0x10;
Johannes Berg79c892b2014-11-21 14:26:31 +0100833 if (tx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200834 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200835 return TX_CONTINUE;
836 }
837
838 /*
839 * This should be true for injected/management frames only, for
840 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
841 * above since they are not QoS-data frames.
842 */
843 if (!tx->sta)
844 return TX_CONTINUE;
845
846 /* include per-STA, per-TID sequence counter */
847
848 qc = ieee80211_get_qos_ctl(hdr);
849 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200850 tx->sta->tx_stats.msdu[tid]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200851
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +0200852 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
Johannes Bergf591fa52008-07-10 11:21:26 +0200853
854 return TX_CONTINUE;
855}
856
Johannes Berg252b86c2011-11-16 15:28:55 +0100857static int ieee80211_fragment(struct ieee80211_tx_data *tx,
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100858 struct sk_buff *skb, int hdrlen,
859 int frag_threshold)
860{
Johannes Berg252b86c2011-11-16 15:28:55 +0100861 struct ieee80211_local *local = tx->local;
Johannes Berga1a3fce2011-11-16 15:28:56 +0100862 struct ieee80211_tx_info *info;
Johannes Berg252b86c2011-11-16 15:28:55 +0100863 struct sk_buff *tmp;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
867
868 if (WARN_ON(rem < 0))
869 return -EINVAL;
870
Johannes Berg252b86c2011-11-16 15:28:55 +0100871 /* first fragment was already added to queue by caller */
872
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100873 while (rem) {
874 int fraglen = per_fragm;
875
876 if (fraglen > rem)
877 fraglen = rem;
878 rem -= fraglen;
879 tmp = dev_alloc_skb(local->tx_headroom +
880 frag_threshold +
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200881 tx->sdata->encrypt_headroom +
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100882 IEEE80211_ENCRYPT_TAILROOM);
883 if (!tmp)
884 return -ENOMEM;
Johannes Berg252b86c2011-11-16 15:28:55 +0100885
886 __skb_queue_tail(&tx->skbs, tmp);
887
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200888 skb_reserve(tmp,
889 local->tx_headroom + tx->sdata->encrypt_headroom);
890
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100891 /* copy control information */
892 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
Johannes Berga1a3fce2011-11-16 15:28:56 +0100893
894 info = IEEE80211_SKB_CB(tmp);
895 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
896 IEEE80211_TX_CTL_FIRST_FRAGMENT);
897
898 if (rem)
899 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
900
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100901 skb_copy_queue_mapping(tmp, skb);
902 tmp->priority = skb->priority;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100903 tmp->dev = skb->dev;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100904
905 /* copy header and data */
Johannes Berg59ae1d12017-06-16 14:29:20 +0200906 skb_put_data(tmp, skb->data, hdrlen);
907 skb_put_data(tmp, skb->data + pos, fraglen);
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100908
909 pos += fraglen;
910 }
911
Johannes Berg252b86c2011-11-16 15:28:55 +0100912 /* adjust first fragment's length */
Johannes Berg338f9772014-02-01 00:16:23 +0100913 skb_trim(skb, hdrlen + per_fragm);
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100914 return 0;
915}
916
Johannes Bergf591fa52008-07-10 11:21:26 +0200917static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +0200918ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
919{
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100920 struct sk_buff *skb = tx->skb;
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct ieee80211_hdr *hdr = (void *)skb->data;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200923 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100924 int hdrlen;
925 int fragnum;
Johannes Berge2454942008-05-15 12:55:28 +0200926
Johannes Berg252b86c2011-11-16 15:28:55 +0100927 /* no matter what happens, tx->skb moves to tx->skbs */
928 __skb_queue_tail(&tx->skbs, skb);
929 tx->skb = NULL;
930
Johannes Berga26eb272011-10-07 14:01:25 +0200931 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
932 return TX_CONTINUE;
933
Sara Sharonf3fe4e92016-10-18 23:12:11 +0300934 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
Johannes Berge2454942008-05-15 12:55:28 +0200935 return TX_CONTINUE;
936
Johannes Bergeefce912008-05-17 00:57:13 +0200937 /*
938 * Warn when submitting a fragmented A-MPDU frame and drop it.
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200939 * This scenario is handled in ieee80211_tx_prepare but extra
Ron Rindjunsky8d5e0d52008-06-12 15:42:29 +0300940 * caution taken here as fragmented ampdu may cause Tx stop.
Johannes Bergeefce912008-05-17 00:57:13 +0200941 */
Sujith8b30b1f2008-10-24 09:55:27 +0530942 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
Johannes Bergeefce912008-05-17 00:57:13 +0200943 return TX_DROP;
944
Harvey Harrison065e96052008-06-22 16:45:27 -0700945 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berge2454942008-05-15 12:55:28 +0200946
Johannes Berga26eb272011-10-07 14:01:25 +0200947 /* internal error, why isn't DONTFRAG set? */
Johannes Berg8ccd8f22009-04-29 23:35:56 +0200948 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100949 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200950
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100951 /*
952 * Now fragment the frame. This will allocate all the fragments and
953 * chain them (using skb as the first fragment) to skb->next.
954 * During transmission, we will remove the successfully transmitted
955 * fragments from this list. When the low-level driver rejects one
956 * of the fragments then we will simply pretend to accept the skb
957 * but store it away as pending.
958 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100959 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100960 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200961
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100962 /* update duration/seq/flags of fragments */
963 fragnum = 0;
Johannes Berg252b86c2011-11-16 15:28:55 +0100964
965 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100966 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
Johannes Berge2454942008-05-15 12:55:28 +0200967
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100968 hdr = (void *)skb->data;
969 info = IEEE80211_SKB_CB(skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200970
Johannes Berg252b86c2011-11-16 15:28:55 +0100971 if (!skb_queue_is_last(&tx->skbs, skb)) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100972 hdr->frame_control |= morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200973 /*
974 * No multi-rate retries for fragmented frames, that
975 * would completely throw off the NAV at other STAs.
976 */
977 info->control.rates[1].idx = -1;
978 info->control.rates[2].idx = -1;
979 info->control.rates[3].idx = -1;
Thomas Huehne3e1a0b2012-07-02 19:46:16 +0200980 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
Johannes Berge6a98542008-10-21 12:40:02 +0200981 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100982 } else {
983 hdr->frame_control &= ~morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200984 }
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100985 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
986 fragnum++;
Johannes Berg252b86c2011-11-16 15:28:55 +0100987 }
Johannes Berge2454942008-05-15 12:55:28 +0200988
989 return TX_CONTINUE;
Johannes Berge2454942008-05-15 12:55:28 +0200990}
991
Johannes Bergd9e8a702008-06-30 15:10:44 +0200992static ieee80211_tx_result debug_noinline
Johannes Bergfeff1f22009-08-10 16:01:54 +0200993ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
994{
Johannes Berg252b86c2011-11-16 15:28:55 +0100995 struct sk_buff *skb;
Johannes Berg560d2682013-02-05 10:55:21 +0100996 int ac = -1;
Johannes Bergfeff1f22009-08-10 16:01:54 +0200997
998 if (!tx->sta)
999 return TX_CONTINUE;
1000
Johannes Berg252b86c2011-11-16 15:28:55 +01001001 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg560d2682013-02-05 10:55:21 +01001002 ac = skb_get_queue_mapping(skb);
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001003 tx->sta->tx_stats.bytes[ac] += skb->len;
Johannes Berg252b86c2011-11-16 15:28:55 +01001004 }
Johannes Berg560d2682013-02-05 10:55:21 +01001005 if (ac >= 0)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001006 tx->sta->tx_stats.packets[ac]++;
Johannes Bergfeff1f22009-08-10 16:01:54 +02001007
1008 return TX_CONTINUE;
1009}
1010
1011static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +02001012ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1013{
1014 if (!tx->key)
1015 return TX_CONTINUE;
1016
Johannes Berg97359d12010-08-10 09:46:38 +02001017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berge2454942008-05-15 12:55:28 +02001020 return ieee80211_crypto_wep_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001021 case WLAN_CIPHER_SUITE_TKIP:
Johannes Berge2454942008-05-15 12:55:28 +02001022 return ieee80211_crypto_tkip_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001023 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02001024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_MIC_LEN);
1026 case WLAN_CIPHER_SUITE_CCMP_256:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_256_MIC_LEN);
Johannes Berg97359d12010-08-10 09:46:38 +02001029 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02001030 return ieee80211_crypto_aes_cmac_encrypt(tx);
Jouni Malinen56c52da2015-01-24 19:52:08 +02001031 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1032 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
Jouni Malinen8ade5382015-01-24 19:52:09 +02001033 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1034 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1035 return ieee80211_crypto_aes_gmac_encrypt(tx);
Jouni Malinen00b9cfa2015-01-24 19:52:06 +02001036 case WLAN_CIPHER_SUITE_GCMP:
1037 case WLAN_CIPHER_SUITE_GCMP_256:
1038 return ieee80211_crypto_gcmp_encrypt(tx);
Johannes Berg3ffc2a92010-08-27 14:26:52 +03001039 default:
Yoni Divinskyd32a1022012-01-16 15:18:59 +02001040 return ieee80211_crypto_hw_encrypt(tx);
Johannes Berge2454942008-05-15 12:55:28 +02001041 }
1042
Johannes Berge2454942008-05-15 12:55:28 +02001043 return TX_DROP;
1044}
1045
Johannes Bergd9e8a702008-06-30 15:10:44 +02001046static ieee80211_tx_result debug_noinline
Johannes Berg03f93c32008-06-25 14:36:27 +03001047ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1048{
Johannes Berg252b86c2011-11-16 15:28:55 +01001049 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001050 struct ieee80211_hdr *hdr;
1051 int next_len;
1052 bool group_addr;
Johannes Berg03f93c32008-06-25 14:36:27 +03001053
Johannes Berg252b86c2011-11-16 15:28:55 +01001054 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001055 hdr = (void *) skb->data;
Jouni Malinen7e0aae42009-05-19 19:25:58 +03001056 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1057 break; /* must not overwrite AID */
Johannes Berg252b86c2011-11-16 15:28:55 +01001058 if (!skb_queue_is_last(&tx->skbs, skb)) {
1059 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1060 next_len = next->len;
1061 } else
1062 next_len = 0;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001063 group_addr = is_multicast_ether_addr(hdr->addr1);
Johannes Berg03f93c32008-06-25 14:36:27 +03001064
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001065 hdr->duration_id =
Johannes Berg252b86c2011-11-16 15:28:55 +01001066 ieee80211_duration(tx, skb, group_addr, next_len);
1067 }
Johannes Berg03f93c32008-06-25 14:36:27 +03001068
1069 return TX_CONTINUE;
1070}
1071
Johannes Berge2ebc742007-07-27 15:43:22 +02001072/* actual transmit path */
1073
Johannes Berga622ab72010-06-10 10:21:39 +02001074static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1075 struct sk_buff *skb,
1076 struct ieee80211_tx_info *info,
1077 struct tid_ampdu_tx *tid_tx,
1078 int tid)
1079{
1080 bool queued = false;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001081 bool reset_agg_timer = false;
Helmut Schaaaa454582012-03-07 17:20:30 +01001082 struct sk_buff *purge_skb = NULL;
Johannes Berga622ab72010-06-10 10:21:39 +02001083
1084 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1085 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001086 reset_agg_timer = true;
Johannes Berg0ab33702010-06-10 10:21:42 +02001087 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1088 /*
1089 * nothing -- this aggregation session is being started
1090 * but that might still fail with the driver
1091 */
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001092 } else if (!tx->sta->sta.txq[tid]) {
Johannes Berga622ab72010-06-10 10:21:39 +02001093 spin_lock(&tx->sta->lock);
1094 /*
1095 * Need to re-check now, because we may get here
1096 *
1097 * 1) in the window during which the setup is actually
1098 * already done, but not marked yet because not all
1099 * packets are spliced over to the driver pending
1100 * queue yet -- if this happened we acquire the lock
1101 * either before or after the splice happens, but
1102 * need to recheck which of these cases happened.
1103 *
1104 * 2) during session teardown, if the OPERATIONAL bit
1105 * was cleared due to the teardown but the pointer
1106 * hasn't been assigned NULL yet (or we loaded it
1107 * before it was assigned) -- in this case it may
1108 * now be NULL which means we should just let the
1109 * packet pass through because splicing the frames
1110 * back is already done.
1111 */
Johannes Berg40b275b2011-05-13 14:15:49 +02001112 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
Johannes Berga622ab72010-06-10 10:21:39 +02001113
1114 if (!tid_tx) {
1115 /* do nothing, let packet pass through */
1116 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1117 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001118 reset_agg_timer = true;
Johannes Berga622ab72010-06-10 10:21:39 +02001119 } else {
1120 queued = true;
Emmanuel Grumbachf6d46712016-03-17 16:51:42 +02001121 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1122 clear_sta_flag(tx->sta, WLAN_STA_SP);
1123 ps_dbg(tx->sta->sdata,
1124 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1125 tx->sta->sta.addr, tx->sta->sta.aid);
1126 }
Johannes Berga622ab72010-06-10 10:21:39 +02001127 info->control.vif = &tx->sdata->vif;
1128 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Emmanuel Grumbachfacde7f2016-03-17 16:51:41 +02001129 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berga622ab72010-06-10 10:21:39 +02001130 __skb_queue_tail(&tid_tx->pending, skb);
Helmut Schaaaa454582012-03-07 17:20:30 +01001131 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1132 purge_skb = __skb_dequeue(&tid_tx->pending);
Johannes Berga622ab72010-06-10 10:21:39 +02001133 }
1134 spin_unlock(&tx->sta->lock);
Helmut Schaaaa454582012-03-07 17:20:30 +01001135
1136 if (purge_skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001137 ieee80211_free_txskb(&tx->local->hw, purge_skb);
Johannes Berga622ab72010-06-10 10:21:39 +02001138 }
1139
Nikolay Martynov285fa692011-11-22 21:50:28 -05001140 /* reset session timer */
1141 if (reset_agg_timer && tid_tx->timeout)
Felix Fietkau12d3952f2012-03-18 22:58:06 +01001142 tid_tx->last_tx = jiffies;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001143
Johannes Berga622ab72010-06-10 10:21:39 +02001144 return queued;
1145}
1146
Johannes Berg58d41852007-09-26 17:53:18 +02001147/*
1148 * initialises @tx
Johannes Berg7c107702015-03-20 14:18:27 +01001149 * pass %NULL for the station if unknown, a valid pointer if known
1150 * or an ERR_PTR() if the station is known not to exist
Johannes Berg58d41852007-09-26 17:53:18 +02001151 */
Johannes Berg9ae54c82008-01-31 19:48:20 +01001152static ieee80211_tx_result
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001153ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_tx_data *tx,
Johannes Berg7c107702015-03-20 14:18:27 +01001155 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001156{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001157 struct ieee80211_local *local = sdata->local;
Johannes Berg58d41852007-09-26 17:53:18 +02001158 struct ieee80211_hdr *hdr;
Johannes Berge039fa42008-05-15 12:55:29 +02001159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg68f2b512011-10-07 14:01:24 +02001160 int tid;
Johannes Berga622ab72010-06-10 10:21:39 +02001161 u8 *qc;
Johannes Berge2ebc742007-07-27 15:43:22 +02001162
1163 memset(tx, 0, sizeof(*tx));
1164 tx->skb = skb;
Johannes Berge2ebc742007-07-27 15:43:22 +02001165 tx->local = local;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001166 tx->sdata = sdata;
Johannes Berg252b86c2011-11-16 15:28:55 +01001167 __skb_queue_head_init(&tx->skbs);
Johannes Berge2ebc742007-07-27 15:43:22 +02001168
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001169 /*
1170 * If this flag is set to true anywhere, and we get here,
1171 * we are doing the needed processing, so remove the flag
1172 * now.
1173 */
1174 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1175
Johannes Berg58d41852007-09-26 17:53:18 +02001176 hdr = (struct ieee80211_hdr *) skb->data;
1177
Johannes Berg7c107702015-03-20 14:18:27 +01001178 if (likely(sta)) {
1179 if (!IS_ERR(sta))
1180 tx->sta = sta;
1181 } else {
1182 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1183 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1184 if (!tx->sta && sdata->wdev.use_4addr)
1185 return TX_DROP;
1186 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1187 IEEE80211_TX_CTL_INJECTED) ||
1188 tx->sdata->control_port_protocol == tx->skb->protocol) {
1189 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1190 }
1191 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1192 tx->sta = sta_info_get(sdata, hdr->addr1);
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001193 }
Johannes Berg58d41852007-09-26 17:53:18 +02001194
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001195 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
Johannes Berg49a59542011-09-29 16:04:41 +02001196 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001197 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1198 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001199 struct tid_ampdu_tx *tid_tx;
1200
Sujith8b30b1f2008-10-24 09:55:27 +05301201 qc = ieee80211_get_qos_ctl(hdr);
1202 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1203
Johannes Berga622ab72010-06-10 10:21:39 +02001204 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1205 if (tid_tx) {
1206 bool queued;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001207
Johannes Berga622ab72010-06-10 10:21:39 +02001208 queued = ieee80211_tx_prep_agg(tx, skb, info,
1209 tid_tx, tid);
1210
1211 if (unlikely(queued))
1212 return TX_QUEUED;
1213 }
Sujith8b30b1f2008-10-24 09:55:27 +05301214 }
1215
Jiri Slabybadffb72007-08-28 17:01:54 -04001216 if (is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg5cf121c2008-02-25 16:27:43 +01001217 tx->flags &= ~IEEE80211_TX_UNICAST;
Johannes Berge039fa42008-05-15 12:55:29 +02001218 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Simon Wunderlich6fd67e92011-11-18 14:20:42 +01001219 } else
Johannes Berg5cf121c2008-02-25 16:27:43 +01001220 tx->flags |= IEEE80211_TX_UNICAST;
Johannes Berg58d41852007-09-26 17:53:18 +02001221
Johannes Berga26eb272011-10-07 14:01:25 +02001222 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1223 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1224 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1225 info->flags & IEEE80211_TX_CTL_AMPDU)
1226 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
Johannes Berg58d41852007-09-26 17:53:18 +02001227 }
1228
Johannes Berge2ebc742007-07-27 15:43:22 +02001229 if (!tx->sta)
Johannes Berge039fa42008-05-15 12:55:29 +02001230 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Felix Fietkauf7418bc2015-09-24 14:59:49 +02001231 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
Johannes Berge039fa42008-05-15 12:55:29 +02001232 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Felix Fietkauf7418bc2015-09-24 14:59:49 +02001233 ieee80211_check_fast_xmit(tx->sta);
1234 }
Johannes Berg58d41852007-09-26 17:53:18 +02001235
Johannes Berge039fa42008-05-15 12:55:29 +02001236 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge2ebc742007-07-27 15:43:22 +02001237
Johannes Berg9ae54c82008-01-31 19:48:20 +01001238 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +02001239}
1240
Michal Kazior80a83cf2016-05-19 10:37:48 +02001241static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1242 struct ieee80211_vif *vif,
Michal Kaziordbef5362017-01-13 13:32:51 +01001243 struct sta_info *sta,
Michal Kazior80a83cf2016-05-19 10:37:48 +02001244 struct sk_buff *skb)
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001245{
1246 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001247 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001248 struct ieee80211_txq *txq = NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001249
Felix Fietkauc3732a72016-02-28 15:19:53 +01001250 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1251 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
Michal Kazior80a83cf2016-05-19 10:37:48 +02001252 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001253
1254 if (!ieee80211_is_data(hdr->frame_control))
Michal Kazior80a83cf2016-05-19 10:37:48 +02001255 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001256
Michal Kaziordbef5362017-01-13 13:32:51 +01001257 if (sta) {
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001258 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1259
Michal Kaziordbef5362017-01-13 13:32:51 +01001260 if (!sta->uploaded)
1261 return NULL;
1262
1263 txq = sta->sta.txq[tid];
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001264 } else if (vif) {
1265 txq = vif->txq;
1266 }
1267
1268 if (!txq)
Michal Kazior80a83cf2016-05-19 10:37:48 +02001269 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001270
Michal Kazior80a83cf2016-05-19 10:37:48 +02001271 return to_txq_info(txq);
1272}
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001273
Michal Kazior5caa3282016-05-19 10:37:51 +02001274static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1275{
1276 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1277}
1278
Michal Kazior5caa3282016-05-19 10:37:51 +02001279static u32 codel_skb_len_func(const struct sk_buff *skb)
1280{
1281 return skb->len;
1282}
1283
1284static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1285{
1286 const struct ieee80211_tx_info *info;
1287
1288 info = (const struct ieee80211_tx_info *)skb->cb;
1289 return info->control.enqueue_time;
1290}
1291
1292static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1293 void *ctx)
1294{
1295 struct ieee80211_local *local;
1296 struct txq_info *txqi;
1297 struct fq *fq;
1298 struct fq_flow *flow;
1299
1300 txqi = ctx;
1301 local = vif_to_sdata(txqi->txq.vif)->local;
1302 fq = &local->fq;
1303
1304 if (cvars == &txqi->def_cvars)
1305 flow = &txqi->def_flow;
1306 else
1307 flow = &fq->flows[cvars - local->cvars];
1308
1309 return fq_flow_dequeue(fq, flow);
1310}
1311
1312static void codel_drop_func(struct sk_buff *skb,
1313 void *ctx)
1314{
1315 struct ieee80211_local *local;
1316 struct ieee80211_hw *hw;
1317 struct txq_info *txqi;
1318
1319 txqi = ctx;
1320 local = vif_to_sdata(txqi->txq.vif)->local;
1321 hw = &local->hw;
1322
1323 ieee80211_free_txskb(hw, skb);
1324}
1325
Michal Kaziorfa962b92016-05-19 10:37:49 +02001326static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1327 struct fq_tin *tin,
1328 struct fq_flow *flow)
1329{
Michal Kazior5caa3282016-05-19 10:37:51 +02001330 struct ieee80211_local *local;
1331 struct txq_info *txqi;
1332 struct codel_vars *cvars;
1333 struct codel_params *cparams;
1334 struct codel_stats *cstats;
1335
1336 local = container_of(fq, struct ieee80211_local, fq);
1337 txqi = container_of(tin, struct txq_info, tin);
Toke Høiland-Jørgensen8d51dbb2016-09-12 15:55:43 +02001338 cstats = &txqi->cstats;
Michal Kazior5caa3282016-05-19 10:37:51 +02001339
Toke Høiland-Jørgensen484a54c2017-04-06 11:38:26 +02001340 if (txqi->txq.sta) {
1341 struct sta_info *sta = container_of(txqi->txq.sta,
1342 struct sta_info, sta);
1343 cparams = &sta->cparams;
1344 } else {
1345 cparams = &local->cparams;
1346 }
1347
Michal Kazior5caa3282016-05-19 10:37:51 +02001348 if (flow == &txqi->def_flow)
1349 cvars = &txqi->def_cvars;
1350 else
1351 cvars = &local->cvars[flow - fq->flows];
1352
1353 return codel_dequeue(txqi,
1354 &flow->backlog,
1355 cparams,
1356 cvars,
1357 cstats,
1358 codel_skb_len_func,
1359 codel_skb_time_func,
1360 codel_drop_func,
1361 codel_dequeue_func);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001362}
1363
1364static void fq_skb_free_func(struct fq *fq,
1365 struct fq_tin *tin,
1366 struct fq_flow *flow,
1367 struct sk_buff *skb)
1368{
1369 struct ieee80211_local *local;
1370
1371 local = container_of(fq, struct ieee80211_local, fq);
1372 ieee80211_free_txskb(&local->hw, skb);
1373}
1374
1375static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1376 struct fq_tin *tin,
1377 int idx,
1378 struct sk_buff *skb)
1379{
1380 struct txq_info *txqi;
1381
1382 txqi = container_of(tin, struct txq_info, tin);
1383 return &txqi->def_flow;
1384}
1385
Michal Kazior80a83cf2016-05-19 10:37:48 +02001386static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1387 struct txq_info *txqi,
1388 struct sk_buff *skb)
1389{
Michal Kaziorfa962b92016-05-19 10:37:49 +02001390 struct fq *fq = &local->fq;
1391 struct fq_tin *tin = &txqi->tin;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001392
Michal Kazior5caa3282016-05-19 10:37:51 +02001393 ieee80211_set_skb_enqueue_time(skb);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001394 fq_tin_enqueue(fq, tin, skb,
1395 fq_skb_free_func,
1396 fq_flow_get_default_func);
1397}
Michal Kazior80a83cf2016-05-19 10:37:48 +02001398
Johannes Berg2a9e2572017-10-06 11:53:33 +02001399static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1400 struct fq_flow *flow, struct sk_buff *skb,
1401 void *data)
1402{
1403 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1404
1405 return info->control.vif == data;
1406}
1407
1408void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1409 struct ieee80211_sub_if_data *sdata)
1410{
1411 struct fq *fq = &local->fq;
1412 struct txq_info *txqi;
1413 struct fq_tin *tin;
1414 struct ieee80211_sub_if_data *ap;
1415
1416 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1417 return;
1418
1419 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1420
1421 if (!ap->vif.txq)
1422 return;
1423
1424 txqi = to_txq_info(ap->vif.txq);
1425 tin = &txqi->tin;
1426
1427 spin_lock_bh(&fq->lock);
1428 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1429 fq_skb_free_func);
1430 spin_unlock_bh(&fq->lock);
1431}
1432
Michal Kaziorfa962b92016-05-19 10:37:49 +02001433void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1434 struct sta_info *sta,
1435 struct txq_info *txqi, int tid)
1436{
1437 fq_tin_init(&txqi->tin);
1438 fq_flow_init(&txqi->def_flow);
Michal Kazior5caa3282016-05-19 10:37:51 +02001439 codel_vars_init(&txqi->def_cvars);
Toke Høiland-Jørgensen8d51dbb2016-09-12 15:55:43 +02001440 codel_stats_init(&txqi->cstats);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001441 __skb_queue_head_init(&txqi->frags);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001442
1443 txqi->txq.vif = &sdata->vif;
1444
1445 if (sta) {
1446 txqi->txq.sta = &sta->sta;
1447 sta->sta.txq[tid] = &txqi->txq;
1448 txqi->txq.tid = tid;
Amadeusz Sławiński731977e2017-01-24 16:42:10 +01001449 txqi->txq.ac = ieee80211_ac_from_tid(tid);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001450 } else {
1451 sdata->vif.txq = &txqi->txq;
1452 txqi->txq.tid = 0;
1453 txqi->txq.ac = IEEE80211_AC_BE;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001454 }
Michal Kaziorfa962b92016-05-19 10:37:49 +02001455}
Michal Kazior80a83cf2016-05-19 10:37:48 +02001456
Michal Kaziorfa962b92016-05-19 10:37:49 +02001457void ieee80211_txq_purge(struct ieee80211_local *local,
1458 struct txq_info *txqi)
1459{
1460 struct fq *fq = &local->fq;
1461 struct fq_tin *tin = &txqi->tin;
1462
1463 fq_tin_reset(fq, tin, fq_skb_free_func);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001464 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001465}
1466
1467int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1468{
1469 struct fq *fq = &local->fq;
1470 int ret;
Michal Kazior5caa3282016-05-19 10:37:51 +02001471 int i;
Toke Høiland-Jørgensen3ff23cd2016-09-23 21:59:11 +02001472 bool supp_vht = false;
1473 enum nl80211_band band;
Michal Kaziorfa962b92016-05-19 10:37:49 +02001474
1475 if (!local->ops->wake_tx_queue)
1476 return 0;
1477
1478 ret = fq_init(fq, 4096);
1479 if (ret)
1480 return ret;
1481
Toke Høiland-Jørgensen3ff23cd2016-09-23 21:59:11 +02001482 /*
1483 * If the hardware doesn't support VHT, it is safe to limit the maximum
1484 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1485 */
1486 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1487 struct ieee80211_supported_band *sband;
1488
1489 sband = local->hw.wiphy->bands[band];
1490 if (!sband)
1491 continue;
1492
1493 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1494 }
1495
1496 if (!supp_vht)
1497 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1498
Michal Kazior5caa3282016-05-19 10:37:51 +02001499 codel_params_init(&local->cparams);
Michal Kazior5caa3282016-05-19 10:37:51 +02001500 local->cparams.interval = MS2TIME(100);
1501 local->cparams.target = MS2TIME(20);
1502 local->cparams.ecn = true;
1503
1504 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1505 GFP_KERNEL);
1506 if (!local->cvars) {
Michal Kazior59a7c822016-06-29 14:00:34 +02001507 spin_lock_bh(&fq->lock);
Michal Kazior5caa3282016-05-19 10:37:51 +02001508 fq_reset(fq, fq_skb_free_func);
Michal Kazior59a7c822016-06-29 14:00:34 +02001509 spin_unlock_bh(&fq->lock);
Michal Kazior5caa3282016-05-19 10:37:51 +02001510 return -ENOMEM;
1511 }
1512
1513 for (i = 0; i < fq->flows_cnt; i++)
1514 codel_vars_init(&local->cvars[i]);
1515
Michal Kaziorfa962b92016-05-19 10:37:49 +02001516 return 0;
1517}
1518
1519void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1520{
1521 struct fq *fq = &local->fq;
1522
1523 if (!local->ops->wake_tx_queue)
1524 return;
1525
Michal Kazior5caa3282016-05-19 10:37:51 +02001526 kfree(local->cvars);
1527 local->cvars = NULL;
1528
Michal Kazior59a7c822016-06-29 14:00:34 +02001529 spin_lock_bh(&fq->lock);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001530 fq_reset(fq, fq_skb_free_func);
Michal Kazior59a7c822016-06-29 14:00:34 +02001531 spin_unlock_bh(&fq->lock);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001532}
1533
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001534static bool ieee80211_queue_skb(struct ieee80211_local *local,
1535 struct ieee80211_sub_if_data *sdata,
1536 struct sta_info *sta,
1537 struct sk_buff *skb)
1538{
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001539 struct fq *fq = &local->fq;
1540 struct ieee80211_vif *vif;
1541 struct txq_info *txqi;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001542
1543 if (!local->ops->wake_tx_queue ||
1544 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1545 return false;
1546
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001547 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1548 sdata = container_of(sdata->bss,
1549 struct ieee80211_sub_if_data, u.ap);
1550
1551 vif = &sdata->vif;
Michal Kaziordbef5362017-01-13 13:32:51 +01001552 txqi = ieee80211_get_txq(local, vif, sta, skb);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001553
1554 if (!txqi)
1555 return false;
1556
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001557 spin_lock_bh(&fq->lock);
1558 ieee80211_txq_enqueue(local, txqi, skb);
1559 spin_unlock_bh(&fq->lock);
1560
Johannes Berge7881bd52017-12-19 10:11:54 +01001561 drv_wake_tx_queue(local, txqi);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001562
1563 return true;
1564}
1565
Johannes Berg11127e92011-11-16 16:02:47 +01001566static bool ieee80211_tx_frags(struct ieee80211_local *local,
1567 struct ieee80211_vif *vif,
1568 struct ieee80211_sta *sta,
1569 struct sk_buff_head *skbs,
1570 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001571{
Michal Kazior80a83cf2016-05-19 10:37:48 +02001572 struct ieee80211_tx_control control = {};
Johannes Berg252b86c2011-11-16 15:28:55 +01001573 struct sk_buff *skb, *tmp;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001574 unsigned long flags;
Johannes Berge2ebc742007-07-27 15:43:22 +02001575
Johannes Berg252b86c2011-11-16 15:28:55 +01001576 skb_queue_walk_safe(skbs, skb, tmp) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001577 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1578 int q = info->hw_queue;
1579
1580#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1581 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1582 __skb_unlink(skb, skbs);
Felix Fietkauc3e77242012-10-08 14:39:33 +02001583 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001584 continue;
1585 }
1586#endif
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001587
1588 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001589 if (local->queue_stop_reasons[q] ||
Johannes Berg7bb45682011-02-24 14:42:06 +01001590 (!txpending && !skb_queue_empty(&local->pending[q]))) {
Seth Forshee6c17b772013-02-11 11:21:07 -06001591 if (unlikely(info->flags &
Seth Forsheea7679ed2013-02-25 14:58:05 -06001592 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1593 if (local->queue_stop_reasons[q] &
1594 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1595 /*
1596 * Drop off-channel frames if queues
1597 * are stopped for any reason other
1598 * than off-channel operation. Never
1599 * queue them.
1600 */
1601 spin_unlock_irqrestore(
1602 &local->queue_stop_reason_lock,
1603 flags);
1604 ieee80211_purge_tx_queue(&local->hw,
1605 skbs);
1606 return true;
1607 }
1608 } else {
1609
Seth Forshee6c17b772013-02-11 11:21:07 -06001610 /*
Seth Forsheea7679ed2013-02-25 14:58:05 -06001611 * Since queue is stopped, queue up frames for
1612 * later transmission from the tx-pending
1613 * tasklet when the queue is woken again.
Seth Forshee6c17b772013-02-11 11:21:07 -06001614 */
Seth Forsheea7679ed2013-02-25 14:58:05 -06001615 if (txpending)
1616 skb_queue_splice_init(skbs,
1617 &local->pending[q]);
1618 else
1619 skb_queue_splice_tail_init(skbs,
1620 &local->pending[q]);
1621
1622 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1623 flags);
1624 return false;
Seth Forshee6c17b772013-02-11 11:21:07 -06001625 }
Johannes Berg7bb45682011-02-24 14:42:06 +01001626 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001627 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Tomas Winklerf8e79dd2008-07-24 18:46:44 +03001628
Johannes Berg11127e92011-11-16 16:02:47 +01001629 info->control.vif = vif;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001630 control.sta = sta;
Johannes Bergec25acc2010-07-22 17:11:28 +02001631
Johannes Berg252b86c2011-11-16 15:28:55 +01001632 __skb_unlink(skb, skbs);
Michal Kazior80a83cf2016-05-19 10:37:48 +02001633 drv_tx(local, &control, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001634 }
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001635
Johannes Berg11127e92011-11-16 16:02:47 +01001636 return true;
1637}
1638
1639/*
1640 * Returns false if the frame couldn't be transmitted but was queued instead.
1641 */
1642static bool __ieee80211_tx(struct ieee80211_local *local,
1643 struct sk_buff_head *skbs, int led_len,
1644 struct sta_info *sta, bool txpending)
1645{
1646 struct ieee80211_tx_info *info;
1647 struct ieee80211_sub_if_data *sdata;
1648 struct ieee80211_vif *vif;
1649 struct ieee80211_sta *pubsta;
1650 struct sk_buff *skb;
1651 bool result = true;
1652 __le16 fc;
1653
1654 if (WARN_ON(skb_queue_empty(skbs)))
1655 return true;
1656
1657 skb = skb_peek(skbs);
1658 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1659 info = IEEE80211_SKB_CB(skb);
1660 sdata = vif_to_sdata(info->control.vif);
1661 if (sta && !sta->uploaded)
1662 sta = NULL;
1663
1664 if (sta)
1665 pubsta = &sta->sta;
1666 else
1667 pubsta = NULL;
1668
1669 switch (sdata->vif.type) {
1670 case NL80211_IFTYPE_MONITOR:
Aviya Erenfeldd8212182016-08-29 23:25:15 +03001671 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
Johannes Bergc82b5a72013-07-14 23:39:20 +03001672 vif = &sdata->vif;
1673 break;
1674 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001675 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001676 if (sdata) {
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001677 vif = &sdata->vif;
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001678 info->hw_queue =
1679 vif->hw_queue[skb_get_queue_mapping(skb)];
Johannes Berg30686bf2015-06-02 21:39:54 +02001680 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
Johannes Berg63b4d8b2015-11-24 15:41:50 +01001681 ieee80211_purge_tx_queue(&local->hw, skbs);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001682 return true;
1683 } else
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001684 vif = NULL;
Johannes Berg11127e92011-11-16 16:02:47 +01001685 break;
1686 case NL80211_IFTYPE_AP_VLAN:
1687 sdata = container_of(sdata->bss,
1688 struct ieee80211_sub_if_data, u.ap);
1689 /* fall through */
1690 default:
1691 vif = &sdata->vif;
1692 break;
1693 }
1694
Johannes Bergcb831b52012-07-02 15:40:18 +02001695 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1696 txpending);
Johannes Berg11127e92011-11-16 16:02:47 +01001697
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001698 ieee80211_tpt_led_trig_tx(local, fc, led_len);
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001699
Johannes Berg4db4e0a2011-11-24 14:47:36 +01001700 WARN_ON_ONCE(!skb_queue_empty(skbs));
Johannes Berg252b86c2011-11-16 15:28:55 +01001701
Johannes Berg11127e92011-11-16 16:02:47 +01001702 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001703}
1704
Johannes Berg97b045d2008-06-20 01:22:30 +02001705/*
1706 * Invoke TX handlers, return 0 on success and non-zero if the
1707 * frame was dropped or queued.
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001708 *
1709 * The handlers are split into an early and late part. The latter is everything
1710 * that can be sensitive to reordering, and will be deferred to after packets
1711 * are dequeued from the intermediate queues (when they are enabled).
Johannes Berg97b045d2008-06-20 01:22:30 +02001712 */
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001713static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
Johannes Berg97b045d2008-06-20 01:22:30 +02001714{
Johannes Berg97b045d2008-06-20 01:22:30 +02001715 ieee80211_tx_result res = TX_DROP;
Johannes Berg97b045d2008-06-20 01:22:30 +02001716
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001717#define CALL_TXH(txh) \
1718 do { \
1719 res = txh(tx); \
1720 if (res != TX_CONTINUE) \
1721 goto txh_done; \
1722 } while (0)
Johannes Berg97b045d2008-06-20 01:22:30 +02001723
Kalle Valo5c1b98a2010-01-12 10:42:46 +02001724 CALL_TXH(ieee80211_tx_h_dynamic_ps);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001725 CALL_TXH(ieee80211_tx_h_check_assoc);
1726 CALL_TXH(ieee80211_tx_h_ps_buf);
Johannes Berga621fa42010-08-27 14:26:54 +03001727 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001728 CALL_TXH(ieee80211_tx_h_select_key);
Johannes Berg30686bf2015-06-02 21:39:54 +02001729 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Johannes Bergaf65cd962009-11-17 18:18:36 +01001730 CALL_TXH(ieee80211_tx_h_rate_ctrl);
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001731
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001732 txh_done:
1733 if (unlikely(res == TX_DROP)) {
1734 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1735 if (tx->skb)
1736 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1737 else
1738 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1739 return -1;
1740 } else if (unlikely(res == TX_QUEUED)) {
1741 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1742 return -1;
1743 }
1744
1745 return 0;
1746}
1747
1748/*
1749 * Late handlers can be called while the sta lock is held. Handlers that can
1750 * cause packets to be generated will cause deadlock!
1751 */
1752static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1753{
1754 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1755 ieee80211_tx_result res = TX_CONTINUE;
1756
Johannes Bergaa5b5492011-12-02 22:08:52 +01001757 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1758 __skb_queue_tail(&tx->skbs, tx->skb);
1759 tx->skb = NULL;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001760 goto txh_done;
Johannes Bergaa5b5492011-12-02 22:08:52 +01001761 }
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001762
1763 CALL_TXH(ieee80211_tx_h_michael_mic_add);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001764 CALL_TXH(ieee80211_tx_h_sequence);
1765 CALL_TXH(ieee80211_tx_h_fragment);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001766 /* handlers after fragment must be aware of tx info fragmentation! */
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001767 CALL_TXH(ieee80211_tx_h_stats);
1768 CALL_TXH(ieee80211_tx_h_encrypt);
Johannes Berg30686bf2015-06-02 21:39:54 +02001769 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Arik Nemtsov8fd369e2011-01-31 22:29:12 +02001770 CALL_TXH(ieee80211_tx_h_calculate_duration);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001771#undef CALL_TXH
1772
1773 txh_done:
Johannes Berg97b045d2008-06-20 01:22:30 +02001774 if (unlikely(res == TX_DROP)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001775 I802_DEBUG_INC(tx->local->tx_handlers_drop);
Johannes Berg252b86c2011-11-16 15:28:55 +01001776 if (tx->skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001777 ieee80211_free_txskb(&tx->local->hw, tx->skb);
Johannes Berg252b86c2011-11-16 15:28:55 +01001778 else
Felix Fietkau1f98ab72012-11-10 03:44:14 +01001779 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
Johannes Berg97b045d2008-06-20 01:22:30 +02001780 return -1;
1781 } else if (unlikely(res == TX_QUEUED)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001782 I802_DEBUG_INC(tx->local->tx_handlers_queued);
Johannes Berg97b045d2008-06-20 01:22:30 +02001783 return -1;
1784 }
1785
1786 return 0;
1787}
1788
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001789static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1790{
1791 int r = invoke_tx_handlers_early(tx);
1792
1793 if (r)
1794 return r;
1795 return invoke_tx_handlers_late(tx);
1796}
1797
Felix Fietkau06be6b12013-10-14 18:01:00 +02001798bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1799 struct ieee80211_vif *vif, struct sk_buff *skb,
1800 int band, struct ieee80211_sta **sta)
1801{
1802 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1803 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1804 struct ieee80211_tx_data tx;
Johannes Berg88724a82015-03-01 09:10:12 +02001805 struct sk_buff *skb2;
Felix Fietkau06be6b12013-10-14 18:01:00 +02001806
Johannes Berg7c107702015-03-20 14:18:27 +01001807 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
Felix Fietkau06be6b12013-10-14 18:01:00 +02001808 return false;
1809
1810 info->band = band;
1811 info->control.vif = vif;
1812 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1813
1814 if (invoke_tx_handlers(&tx))
1815 return false;
1816
1817 if (sta) {
1818 if (tx.sta)
1819 *sta = &tx.sta->sta;
1820 else
1821 *sta = NULL;
1822 }
1823
Johannes Berg88724a82015-03-01 09:10:12 +02001824 /* this function isn't suitable for fragmented data frames */
1825 skb2 = __skb_dequeue(&tx.skbs);
1826 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1827 ieee80211_free_txskb(hw, skb2);
1828 ieee80211_purge_tx_queue(hw, &tx.skbs);
1829 return false;
1830 }
1831
Felix Fietkau06be6b12013-10-14 18:01:00 +02001832 return true;
1833}
1834EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1835
Johannes Berg7bb45682011-02-24 14:42:06 +01001836/*
1837 * Returns false if the frame couldn't be transmitted but was queued instead.
1838 */
1839static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01001840 struct sta_info *sta, struct sk_buff *skb,
1841 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001842{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001843 struct ieee80211_local *local = sdata->local;
Johannes Berg5cf121c2008-02-25 16:27:43 +01001844 struct ieee80211_tx_data tx;
Johannes Berg97b045d2008-06-20 01:22:30 +02001845 ieee80211_tx_result res_prepare;
Johannes Berge039fa42008-05-15 12:55:29 +02001846 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001847 bool result = true;
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001848 int led_len;
Johannes Berge2ebc742007-07-27 15:43:22 +02001849
Johannes Berge2ebc742007-07-27 15:43:22 +02001850 if (unlikely(skb->len < 10)) {
1851 dev_kfree_skb(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001852 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001853 }
1854
Johannes Berg58d41852007-09-26 17:53:18 +02001855 /* initialises tx */
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001856 led_len = skb->len;
Johannes Berg7c107702015-03-20 14:18:27 +01001857 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001858
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001859 if (unlikely(res_prepare == TX_DROP)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001860 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg55de9082012-07-26 17:24:39 +02001861 return true;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001862 } else if (unlikely(res_prepare == TX_QUEUED)) {
Johannes Berg55de9082012-07-26 17:24:39 +02001863 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001864 }
1865
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001866 /* set up hw_queue value early */
1867 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
Johannes Berg30686bf2015-06-02 21:39:54 +02001868 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001869 info->hw_queue =
1870 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1871
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001872 if (invoke_tx_handlers_early(&tx))
1873 return false;
1874
1875 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1876 return true;
1877
1878 if (!invoke_tx_handlers_late(&tx))
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001879 result = __ieee80211_tx(local, &tx.skbs, led_len,
1880 tx.sta, txpending);
Johannes Berg55de9082012-07-26 17:24:39 +02001881
Johannes Berg7bb45682011-02-24 14:42:06 +01001882 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001883}
1884
1885/* device xmit handlers */
1886
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301887static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
Johannes Berg23c07522008-05-29 10:38:53 +02001888 struct sk_buff *skb,
1889 int head_need, bool may_encrypt)
1890{
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301891 struct ieee80211_local *local = sdata->local;
Johannes Berg23c07522008-05-29 10:38:53 +02001892 int tail_need = 0;
1893
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301894 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
Johannes Berg23c07522008-05-29 10:38:53 +02001895 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1896 tail_need -= skb_tailroom(skb);
1897 tail_need = max_t(int, tail_need, 0);
1898 }
1899
Ido Yarivc70f59a2014-07-29 15:39:14 +03001900 if (skb_cloned(skb) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001901 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
Ido Yarivc70f59a2014-07-29 15:39:14 +03001902 !skb_clone_writable(skb, ETH_HLEN) ||
Johannes Berg17c18bf2015-03-21 15:25:43 +01001903 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
Johannes Berg23c07522008-05-29 10:38:53 +02001904 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001905 else if (head_need || tail_need)
Johannes Berg23c07522008-05-29 10:38:53 +02001906 I802_DEBUG_INC(local->tx_expand_skb_head);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001907 else
1908 return 0;
Johannes Berg23c07522008-05-29 10:38:53 +02001909
1910 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001911 wiphy_debug(local->hw.wiphy,
1912 "failed to reallocate TX buffer\n");
Johannes Berg23c07522008-05-29 10:38:53 +02001913 return -ENOMEM;
1914 }
1915
Johannes Berg23c07522008-05-29 10:38:53 +02001916 return 0;
1917}
1918
Johannes Berg7c107702015-03-20 14:18:27 +01001919void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1920 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001921{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001922 struct ieee80211_local *local = sdata->local;
Johannes Berge039fa42008-05-15 12:55:29 +02001923 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Colin Ian King11b05ba2018-02-02 16:31:42 +00001924 struct ieee80211_hdr *hdr;
Johannes Berge2ebc742007-07-27 15:43:22 +02001925 int headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001926 bool may_encrypt;
Johannes Berge2ebc742007-07-27 15:43:22 +02001927
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001928 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
Johannes Berg23c07522008-05-29 10:38:53 +02001929
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001930 headroom = local->tx_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001931 if (may_encrypt)
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001932 headroom += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001933 headroom -= skb_headroom(skb);
1934 headroom = max_t(int, 0, headroom);
1935
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301936 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001937 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001938 return;
Johannes Berge2ebc742007-07-27 15:43:22 +02001939 }
1940
Steve deRosier740c1aa2010-09-11 20:01:31 -07001941 hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berg5061b0c2009-07-14 00:33:34 +02001942 info->control.vif = &sdata->vif;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001943
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001944 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1945 if (ieee80211_is_data(hdr->frame_control) &&
1946 is_unicast_ether_addr(hdr->addr1)) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01001947 if (mesh_nexthop_resolve(sdata, skb))
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001948 return; /* skb queued: don't free */
1949 } else {
1950 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1951 }
Johannes Berg98aed9f2012-03-27 14:18:36 +02001952 }
Javier Cardonacca89492009-08-10 17:29:29 -07001953
Javier Cardona2154c812011-09-07 17:49:53 -07001954 ieee80211_set_qos_hdr(sdata, skb);
Johannes Berg7c107702015-03-20 14:18:27 +01001955 ieee80211_tx(sdata, sta, skb, false);
Johannes Berge2ebc742007-07-27 15:43:22 +02001956}
1957
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001958static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1959 struct sk_buff *skb)
Johannes Berg73b9f032011-10-07 14:01:26 +02001960{
1961 struct ieee80211_radiotap_iterator iterator;
1962 struct ieee80211_radiotap_header *rthdr =
1963 (struct ieee80211_radiotap_header *) skb->data;
1964 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001965 struct ieee80211_supported_band *sband =
1966 local->hw.wiphy->bands[info->band];
Johannes Berg73b9f032011-10-07 14:01:26 +02001967 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1968 NULL);
1969 u16 txflags;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001970 u16 rate = 0;
1971 bool rate_found = false;
1972 u8 rate_retries = 0;
1973 u16 rate_flags = 0;
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01001974 u8 mcs_known, mcs_flags, mcs_bw;
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01001975 u16 vht_known;
1976 u8 vht_mcs = 0, vht_nss = 0;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001977 int i;
Johannes Berg73b9f032011-10-07 14:01:26 +02001978
1979 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1980 IEEE80211_TX_CTL_DONTFRAG;
1981
1982 /*
1983 * for every radiotap entry that is present
1984 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1985 * entries present, or -EINVAL on error)
1986 */
1987
1988 while (!ret) {
1989 ret = ieee80211_radiotap_iterator_next(&iterator);
1990
1991 if (ret)
1992 continue;
1993
1994 /* see if this argument is something we can use */
1995 switch (iterator.this_arg_index) {
1996 /*
1997 * You must take care when dereferencing iterator.this_arg
1998 * for multibyte types... the pointer is not aligned. Use
1999 * get_unaligned((type *)iterator.this_arg) to dereference
2000 * iterator.this_arg for type "type" safely on all arches.
2001 */
2002 case IEEE80211_RADIOTAP_FLAGS:
2003 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2004 /*
2005 * this indicates that the skb we have been
2006 * handed has the 32-bit FCS CRC at the end...
2007 * we should react to that by snipping it off
2008 * because it will be recomputed and added
2009 * on transmission
2010 */
2011 if (skb->len < (iterator._max_length + FCS_LEN))
2012 return false;
2013
2014 skb_trim(skb, skb->len - FCS_LEN);
2015 }
2016 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2017 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2018 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2019 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2020 break;
2021
2022 case IEEE80211_RADIOTAP_TX_FLAGS:
2023 txflags = get_unaligned_le16(iterator.this_arg);
2024 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2025 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2026 break;
2027
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002028 case IEEE80211_RADIOTAP_RATE:
2029 rate = *iterator.this_arg;
2030 rate_flags = 0;
2031 rate_found = true;
2032 break;
2033
2034 case IEEE80211_RADIOTAP_DATA_RETRIES:
2035 rate_retries = *iterator.this_arg;
2036 break;
2037
2038 case IEEE80211_RADIOTAP_MCS:
2039 mcs_known = iterator.this_arg[0];
2040 mcs_flags = iterator.this_arg[1];
2041 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2042 break;
2043
2044 rate_found = true;
2045 rate = iterator.this_arg[2];
2046 rate_flags = IEEE80211_TX_RC_MCS;
2047
2048 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2049 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2050 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2051
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01002052 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002053 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01002054 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002055 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2056 break;
2057
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01002058 case IEEE80211_RADIOTAP_VHT:
2059 vht_known = get_unaligned_le16(iterator.this_arg);
2060 rate_found = true;
2061
2062 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2063 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2064 (iterator.this_arg[2] &
2065 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2066 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2067 if (vht_known &
2068 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2069 if (iterator.this_arg[3] == 1)
2070 rate_flags |=
2071 IEEE80211_TX_RC_40_MHZ_WIDTH;
2072 else if (iterator.this_arg[3] == 4)
2073 rate_flags |=
2074 IEEE80211_TX_RC_80_MHZ_WIDTH;
2075 else if (iterator.this_arg[3] == 11)
2076 rate_flags |=
2077 IEEE80211_TX_RC_160_MHZ_WIDTH;
2078 }
2079
2080 vht_mcs = iterator.this_arg[4] >> 4;
2081 vht_nss = iterator.this_arg[4] & 0xF;
2082 break;
2083
Johannes Berg73b9f032011-10-07 14:01:26 +02002084 /*
2085 * Please update the file
2086 * Documentation/networking/mac80211-injection.txt
2087 * when parsing new fields here.
2088 */
2089
2090 default:
2091 break;
2092 }
2093 }
2094
2095 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2096 return false;
2097
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002098 if (rate_found) {
2099 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2100
2101 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2102 info->control.rates[i].idx = -1;
2103 info->control.rates[i].flags = 0;
2104 info->control.rates[i].count = 0;
2105 }
2106
2107 if (rate_flags & IEEE80211_TX_RC_MCS) {
2108 info->control.rates[0].idx = rate;
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01002109 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2110 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2111 vht_nss);
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002112 } else {
2113 for (i = 0; i < sband->n_bitrates; i++) {
2114 if (rate * 5 != sband->bitrates[i].bitrate)
2115 continue;
2116
2117 info->control.rates[0].idx = i;
2118 break;
2119 }
2120 }
2121
Felix Fietkau07310a62016-03-02 15:54:51 +01002122 if (info->control.rates[0].idx < 0)
2123 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2124
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002125 info->control.rates[0].flags = rate_flags;
2126 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2127 local->hw.max_rate_tries);
2128 }
2129
Johannes Berg73b9f032011-10-07 14:01:26 +02002130 /*
2131 * remove the radiotap header
2132 * iterator->_max_length was sanity-checked against
2133 * skb->len by iterator init
2134 */
2135 skb_pull(skb, iterator._max_length);
2136
2137 return true;
2138}
2139
Stephen Hemmingerd0cf9c02009-08-31 19:50:57 +00002140netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2141 struct net_device *dev)
Johannes Berge2ebc742007-07-27 15:43:22 +02002142{
2143 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Johannes Berg55de9082012-07-26 17:24:39 +02002144 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02002145 struct ieee80211_radiotap_header *prthdr =
2146 (struct ieee80211_radiotap_header *)skb->data;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002147 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002148 struct ieee80211_hdr *hdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002149 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002150 struct cfg80211_chan_def *chandef;
Andy Green9b8a74e2007-07-27 15:43:24 +02002151 u16 len_rthdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002152 int hdrlen;
Johannes Berge2ebc742007-07-27 15:43:22 +02002153
Andy Green9b8a74e2007-07-27 15:43:24 +02002154 /* check for not even having the fixed radiotap header part */
2155 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2156 goto fail; /* too short to be possibly valid */
2157
2158 /* is it a header version we can trust to find length from? */
2159 if (unlikely(prthdr->it_version))
2160 goto fail; /* only version 0 is supported */
2161
2162 /* then there must be a radiotap header with a length we can use */
2163 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2164
2165 /* does the skb contain enough to deliver on the alleged length? */
2166 if (unlikely(skb->len < len_rthdr))
2167 goto fail; /* skb too short for claimed rt header extent */
Johannes Berge2ebc742007-07-27 15:43:22 +02002168
Johannes Berge2ebc742007-07-27 15:43:22 +02002169 /*
2170 * fix up the pointers accounting for the radiotap
2171 * header still being in there. We are being given
2172 * a precooked IEEE80211 header so no need for
2173 * normal processing
2174 */
Andy Green9b8a74e2007-07-27 15:43:24 +02002175 skb_set_mac_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02002176 /*
Andy Green9b8a74e2007-07-27 15:43:24 +02002177 * these are just fixed to the end of the rt area since we
2178 * don't have any better information and at this point, nobody cares
Johannes Berge2ebc742007-07-27 15:43:22 +02002179 */
Andy Green9b8a74e2007-07-27 15:43:24 +02002180 skb_set_network_header(skb, len_rthdr);
2181 skb_set_transport_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02002182
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002183 if (skb->len < len_rthdr + 2)
2184 goto fail;
2185
2186 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2187 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2188
2189 if (skb->len < len_rthdr + hdrlen)
2190 goto fail;
2191
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002192 /*
2193 * Initialize skb->protocol if the injected frame is a data frame
2194 * carrying a rfc1042 header
2195 */
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002196 if (ieee80211_is_data(hdr->frame_control) &&
2197 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2198 u8 *payload = (u8 *)hdr + hdrlen;
2199
Joe Perchesb203ca32012-05-08 18:56:52 +00002200 if (ether_addr_equal(payload, rfc1042_header))
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002201 skb->protocol = cpu_to_be16((payload[6] << 8) |
2202 payload[7]);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002203 }
2204
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002205 memset(info, 0, sizeof(*info));
2206
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002207 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
Johannes Berg73b9f032011-10-07 14:01:26 +02002208 IEEE80211_TX_CTL_INJECTED;
2209
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002210 rcu_read_lock();
2211
2212 /*
2213 * We process outgoing injected frames that have a local address
2214 * we handle as though they are non-injected frames.
2215 * This code here isn't entirely correct, the local MAC address
2216 * isn't always enough to find the interface to use; for proper
2217 * VLAN/WDS support we will need a different mechanism (which
2218 * likely isn't going to be monitor interfaces).
2219 */
2220 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2221
2222 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2223 if (!ieee80211_sdata_running(tmp_sdata))
2224 continue;
2225 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2226 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2227 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2228 continue;
Joe Perchesb203ca32012-05-08 18:56:52 +00002229 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002230 sdata = tmp_sdata;
2231 break;
2232 }
2233 }
Johannes Berg7351c6b2009-11-19 01:08:30 +01002234
Johannes Berg55de9082012-07-26 17:24:39 +02002235 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2236 if (!chanctx_conf) {
2237 tmp_sdata = rcu_dereference(local->monitor_sdata);
2238 if (tmp_sdata)
2239 chanctx_conf =
2240 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2241 }
Johannes Berg55de9082012-07-26 17:24:39 +02002242
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002243 if (chanctx_conf)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002244 chandef = &chanctx_conf->def;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002245 else if (!local->use_chanctx)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002246 chandef = &local->_oper_chandef;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002247 else
2248 goto fail_rcu;
Johannes Berg55de9082012-07-26 17:24:39 +02002249
2250 /*
2251 * Frame injection is not allowed if beaconing is not allowed
2252 * or if we need radar detection. Beaconing is usually not allowed when
2253 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2254 * Passive scan is also used in world regulatory domains where
2255 * your country is not known and as such it should be treated as
2256 * NO TX unless the channel is explicitly allowed in which case
2257 * your current regulatory domain would not have the passive scan
2258 * flag.
2259 *
2260 * Since AP mode uses monitor interfaces to inject/TX management
2261 * frames we can make AP mode the exception to this rule once it
2262 * supports radar detection as its implementation can deal with
2263 * radar detection by itself. We can do that later by adding a
2264 * monitor flag interfaces used for AP support.
2265 */
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002266 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2267 sdata->vif.type))
Johannes Berg55de9082012-07-26 17:24:39 +02002268 goto fail_rcu;
2269
Johannes Berg73c4e192014-11-09 18:50:09 +02002270 info->band = chandef->chan->band;
Lorenzo Bianconi109843b02016-02-19 12:18:01 +01002271
2272 /* process and remove the injection radiotap header */
2273 if (!ieee80211_parse_tx_radiotap(local, skb))
2274 goto fail_rcu;
2275
Johannes Berg7c107702015-03-20 14:18:27 +01002276 ieee80211_xmit(sdata, NULL, skb);
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002277 rcu_read_unlock();
2278
Johannes Berge2ebc742007-07-27 15:43:22 +02002279 return NETDEV_TX_OK;
Andy Green9b8a74e2007-07-27 15:43:24 +02002280
Johannes Berg55de9082012-07-26 17:24:39 +02002281fail_rcu:
2282 rcu_read_unlock();
Andy Green9b8a74e2007-07-27 15:43:24 +02002283fail:
2284 dev_kfree_skb(skb);
2285 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
Johannes Berge2ebc742007-07-27 15:43:22 +02002286}
2287
Johannes Berg97ffe752015-03-21 09:13:45 +01002288static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002289{
Johannes Berg97ffe752015-03-21 09:13:45 +01002290 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002291
Johannes Berg97ffe752015-03-21 09:13:45 +01002292 return ethertype == ETH_P_TDLS &&
2293 skb->len > 14 &&
2294 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2295}
2296
2297static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2298 struct sk_buff *skb,
2299 struct sta_info **sta_out)
2300{
2301 struct sta_info *sta;
2302
2303 switch (sdata->vif.type) {
2304 case NL80211_IFTYPE_AP_VLAN:
2305 sta = rcu_dereference(sdata->u.vlan.sta);
2306 if (sta) {
2307 *sta_out = sta;
2308 return 0;
2309 } else if (sdata->wdev.use_4addr) {
2310 return -ENOLINK;
2311 }
2312 /* fall through */
2313 case NL80211_IFTYPE_AP:
2314 case NL80211_IFTYPE_OCB:
2315 case NL80211_IFTYPE_ADHOC:
2316 if (is_multicast_ether_addr(skb->data)) {
2317 *sta_out = ERR_PTR(-ENOENT);
2318 return 0;
2319 }
2320 sta = sta_info_get_bss(sdata, skb->data);
2321 break;
2322 case NL80211_IFTYPE_WDS:
2323 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2324 break;
2325#ifdef CONFIG_MAC80211_MESH
2326 case NL80211_IFTYPE_MESH_POINT:
2327 /* determined much later */
2328 *sta_out = NULL;
2329 return 0;
2330#endif
2331 case NL80211_IFTYPE_STATION:
2332 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2333 sta = sta_info_get(sdata, skb->data);
Johannes Berg11d62ca2016-09-13 08:28:22 +02002334 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2335 if (test_sta_flag(sta,
2336 WLAN_STA_TDLS_PEER_AUTH)) {
Johannes Berg97ffe752015-03-21 09:13:45 +01002337 *sta_out = sta;
2338 return 0;
2339 }
2340
2341 /*
2342 * TDLS link during setup - throw out frames to
2343 * peer. Allow TDLS-setup frames to unauthorized
2344 * peers for the special case of a link teardown
2345 * after a TDLS sta is removed due to being
2346 * unreachable.
2347 */
Johannes Berg11d62ca2016-09-13 08:28:22 +02002348 if (!ieee80211_is_tdls_setup(skb))
Johannes Berg97ffe752015-03-21 09:13:45 +01002349 return -EINVAL;
2350 }
2351
2352 }
2353
2354 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2355 if (!sta)
2356 return -ENOLINK;
2357 break;
2358 default:
2359 return -EINVAL;
2360 }
2361
2362 *sta_out = sta ?: ERR_PTR(-ENOENT);
2363 return 0;
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002364}
2365
Johannes Berge2ebc742007-07-27 15:43:22 +02002366/**
Johannes Berg4c9451e2014-11-09 18:50:10 +02002367 * ieee80211_build_hdr - build 802.11 header in the given frame
2368 * @sdata: virtual interface to build the header for
2369 * @skb: the skb to build the header in
Liad Kaufman24d342c2014-11-09 18:50:07 +02002370 * @info_flags: skb flags to set
Johannes Berge2ebc742007-07-27 15:43:22 +02002371 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02002372 * This function takes the skb with 802.3 header and reformats the header to
2373 * the appropriate IEEE 802.11 header based on which interface the packet is
2374 * being transmitted on.
Johannes Berge2ebc742007-07-27 15:43:22 +02002375 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02002376 * Note that this function also takes care of the TX status request and
2377 * potential unsharing of the SKB - this needs to be interleaved with the
2378 * header building.
2379 *
2380 * The function requires the read-side RCU lock held
2381 *
2382 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
Johannes Berge2ebc742007-07-27 15:43:22 +02002383 */
Johannes Berg4c9451e2014-11-09 18:50:10 +02002384static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01002385 struct sk_buff *skb, u32 info_flags,
Johannes Berg97ffe752015-03-21 09:13:45 +01002386 struct sta_info *sta)
Johannes Berge2ebc742007-07-27 15:43:22 +02002387{
Johannes Berg133b8222008-09-16 14:18:59 +02002388 struct ieee80211_local *local = sdata->local;
Felix Fietkau489ee912010-12-18 19:30:48 +01002389 struct ieee80211_tx_info *info;
Johannes Bergdcf33962012-07-30 15:11:56 +02002390 int head_need;
Harvey Harrison065e96052008-06-22 16:45:27 -07002391 u16 ethertype, hdrlen, meshhdrlen = 0;
2392 __le16 fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002393 struct ieee80211_hdr hdr;
Wey-Yi Guyff67bb82010-08-21 07:23:29 -07002394 struct ieee80211s_hdr mesh_hdr __maybe_unused;
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002395 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +02002396 const u8 *encaps_data;
2397 int encaps_len, skip_header_bytes;
Johannes Berg97ffe752015-03-21 09:13:45 +01002398 bool wme_sta = false, authorized = false;
2399 bool tdls_peer;
Johannes Berga729cff2011-11-06 14:13:34 +01002400 bool multicast;
Johannes Berga729cff2011-11-06 14:13:34 +01002401 u16 info_id = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02002402 struct ieee80211_chanctx_conf *chanctx_conf;
2403 struct ieee80211_sub_if_data *ap_sdata;
Johannes Berg57fbcce2016-04-12 15:56:15 +02002404 enum nl80211_band band;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002405 int ret;
Johannes Berge2ebc742007-07-27 15:43:22 +02002406
Johannes Berg97ffe752015-03-21 09:13:45 +01002407 if (IS_ERR(sta))
2408 sta = NULL;
2409
Johannes Berge2ebc742007-07-27 15:43:22 +02002410 /* convert Ethernet header to proper 802.11 header (based on
2411 * operation mode) */
2412 ethertype = (skb->data[12] << 8) | skb->data[13];
Harvey Harrison065e96052008-06-22 16:45:27 -07002413 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
Johannes Berge2ebc742007-07-27 15:43:22 +02002414
Johannes Berg51fb61e2007-12-19 01:31:27 +01002415 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +02002416 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg97ffe752015-03-21 09:13:45 +01002417 if (sdata->wdev.use_4addr) {
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002418 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2419 /* RA TA DA SA */
2420 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002421 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002422 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2423 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2424 hdrlen = 30;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002425 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02002426 wme_sta = sta->sta.wme;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002427 }
Johannes Berg55de9082012-07-26 17:24:39 +02002428 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2429 u.ap);
2430 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002431 if (!chanctx_conf) {
2432 ret = -ENOTCONN;
2433 goto free;
2434 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002435 band = chanctx_conf->def.chan->band;
Johannes Berg97ffe752015-03-21 09:13:45 +01002436 if (sdata->wdev.use_4addr)
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002437 break;
2438 /* fall through */
2439 case NL80211_IFTYPE_AP:
Arnd Bergmannfe801232013-01-25 14:14:33 +00002440 if (sdata->vif.type == NL80211_IFTYPE_AP)
2441 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002442 if (!chanctx_conf) {
2443 ret = -ENOTCONN;
2444 goto free;
2445 }
Harvey Harrison065e96052008-06-22 16:45:27 -07002446 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002447 /* DA BSSID SA */
2448 memcpy(hdr.addr1, skb->data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002449 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002450 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2451 hdrlen = 24;
Johannes Berg4bf88532012-11-09 11:39:59 +01002452 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002453 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002454 case NL80211_IFTYPE_WDS:
Harvey Harrison065e96052008-06-22 16:45:27 -07002455 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002456 /* RA TA DA SA */
2457 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002458 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002459 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2460 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2461 hdrlen = 30;
Johannes Berg55de9082012-07-26 17:24:39 +02002462 /*
2463 * This is the exception! WDS style interfaces are prohibited
2464 * when channel contexts are in used so this must be valid
2465 */
Karl Beldan675a0b02013-03-25 16:26:57 +01002466 band = local->hw.conf.chandef.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002467 break;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002468#ifdef CONFIG_MAC80211_MESH
Johannes Berg05c914f2008-09-11 00:01:58 +02002469 case NL80211_IFTYPE_MESH_POINT:
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002470 if (!is_multicast_ether_addr(skb->data)) {
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002471 struct sta_info *next_hop;
2472 bool mpp_lookup = true;
2473
Johannes Bergbf7cd942013-02-15 14:40:31 +01002474 mpath = mesh_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002475 if (mpath) {
2476 mpp_lookup = false;
2477 next_hop = rcu_dereference(mpath->next_hop);
2478 if (!next_hop ||
2479 !(mpath->flags & (MESH_PATH_ACTIVE |
2480 MESH_PATH_RESOLVING)))
2481 mpp_lookup = true;
2482 }
2483
Henning Roggeab1c7902016-02-03 13:58:37 +01002484 if (mpp_lookup) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01002485 mppath = mpp_path_lookup(sdata, skb->data);
Henning Roggeab1c7902016-02-03 13:58:37 +01002486 if (mppath)
2487 mppath->exp_time = jiffies;
2488 }
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002489
2490 if (mppath && mpath)
Bob Copeland2bdaf382016-02-28 20:03:56 -05002491 mesh_path_del(sdata, mpath->dst);
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002492 }
YanBo79617de2008-09-22 13:30:32 +08002493
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002494 /*
Joel A Fernandes9d525012011-01-10 00:44:23 -06002495 * Use address extension if it is a packet from
2496 * another interface or if we know the destination
2497 * is being proxied by a portal (i.e. portal address
2498 * differs from proxied address)
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002499 */
Joe Perchesb203ca32012-05-08 18:56:52 +00002500 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2501 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
Javier Cardona3c5772a2009-08-10 12:15:48 -07002502 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2503 skb->data, skb->data + ETH_ALEN);
Johannes Bergbf7cd942013-02-15 14:40:31 +01002504 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2505 NULL, NULL);
YanBo79617de2008-09-22 13:30:32 +08002506 } else {
Thomas Pedersen27f01122012-08-20 11:28:25 -07002507 /* DS -> MBSS (802.11-2012 13.11.3.3).
2508 * For unicast with unknown forwarding information,
2509 * destination might be in the MBSS or if that fails
2510 * forwarded to another mesh gate. In either case
2511 * resolution will be handled in ieee80211_xmit(), so
2512 * leave the original DA. This also works for mcast */
2513 const u8 *mesh_da = skb->data;
YanBo79617de2008-09-22 13:30:32 +08002514
Thomas Pedersen27f01122012-08-20 11:28:25 -07002515 if (mppath)
2516 mesh_da = mppath->mpp;
2517 else if (mpath)
2518 mesh_da = mpath->dst;
Thomas Pedersen27f01122012-08-20 11:28:25 -07002519
Javier Cardona3c5772a2009-08-10 12:15:48 -07002520 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
Johannes Berg47846c92009-11-25 17:46:19 +01002521 mesh_da, sdata->vif.addr);
Thomas Pedersen27f01122012-08-20 11:28:25 -07002522 if (is_multicast_ether_addr(mesh_da))
2523 /* DA TA mSA AE:SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002524 meshhdrlen = ieee80211_new_mesh_header(
2525 sdata, &mesh_hdr,
2526 skb->data + ETH_ALEN, NULL);
Javier Cardona3c5772a2009-08-10 12:15:48 -07002527 else
Thomas Pedersen27f01122012-08-20 11:28:25 -07002528 /* RA TA mDA mSA AE:DA SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002529 meshhdrlen = ieee80211_new_mesh_header(
2530 sdata, &mesh_hdr, skb->data,
2531 skb->data + ETH_ALEN);
YanBo79617de2008-09-22 13:30:32 +08002532
YanBo79617de2008-09-22 13:30:32 +08002533 }
Johannes Berg55de9082012-07-26 17:24:39 +02002534 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002535 if (!chanctx_conf) {
2536 ret = -ENOTCONN;
2537 goto free;
2538 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002539 band = chanctx_conf->def.chan->band;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002540 break;
2541#endif
Johannes Berg05c914f2008-09-11 00:01:58 +02002542 case NL80211_IFTYPE_STATION:
Johannes Berg97ffe752015-03-21 09:13:45 +01002543 /* we already did checks when looking up the RA STA */
2544 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002545
Johannes Berg97ffe752015-03-21 09:13:45 +01002546 if (tdls_peer) {
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002547 /* DA SA BSSID */
2548 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2549 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2550 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2551 hdrlen = 24;
2552 } else if (sdata->u.mgd.use_4addr &&
2553 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2554 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2555 IEEE80211_FCTL_TODS);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002556 /* RA TA DA SA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002557 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002558 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002559 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2560 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2561 hdrlen = 30;
2562 } else {
2563 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2564 /* BSSID SA DA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002565 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002566 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2567 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2568 hdrlen = 24;
2569 }
Johannes Berg55de9082012-07-26 17:24:39 +02002570 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002571 if (!chanctx_conf) {
2572 ret = -ENOTCONN;
2573 goto free;
2574 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002575 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002576 break;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002577 case NL80211_IFTYPE_OCB:
2578 /* DA SA BSSID */
2579 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2580 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2581 eth_broadcast_addr(hdr.addr3);
2582 hdrlen = 24;
2583 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002584 if (!chanctx_conf) {
2585 ret = -ENOTCONN;
2586 goto free;
2587 }
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002588 band = chanctx_conf->def.chan->band;
2589 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002590 case NL80211_IFTYPE_ADHOC:
Johannes Berge2ebc742007-07-27 15:43:22 +02002591 /* DA SA BSSID */
2592 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2593 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01002594 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002595 hdrlen = 24;
Johannes Berg55de9082012-07-26 17:24:39 +02002596 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002597 if (!chanctx_conf) {
2598 ret = -ENOTCONN;
2599 goto free;
2600 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002601 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002602 break;
2603 default:
Johannes Berg4c9451e2014-11-09 18:50:10 +02002604 ret = -EINVAL;
2605 goto free;
Johannes Berge2ebc742007-07-27 15:43:22 +02002606 }
2607
Johannes Berga729cff2011-11-06 14:13:34 +01002608 multicast = is_multicast_ether_addr(hdr.addr1);
Johannes Berge2ebc742007-07-27 15:43:22 +02002609
Johannes Berg97ffe752015-03-21 09:13:45 +01002610 /* sta is always NULL for mesh */
2611 if (sta) {
2612 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2613 wme_sta = sta->sta.wme;
2614 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2615 /* For mesh, the use of the QoS header is mandatory */
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002616 wme_sta = true;
Johannes Berge2ebc742007-07-27 15:43:22 +02002617 }
2618
Johannes Berg527871d2015-03-21 08:09:55 +01002619 /* receiver does QoS (which also means we do) use it */
2620 if (wme_sta) {
Harvey Harrison065e96052008-06-22 16:45:27 -07002621 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002622 hdrlen += 2;
2623 }
2624
2625 /*
Johannes Berg238814f2008-01-28 17:19:37 +01002626 * Drop unicast frames to unauthorised stations unless they are
2627 * EAPOL frames from the local station.
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002628 */
Johannes Berg55182e42011-10-12 17:28:21 +02002629 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002630 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
Sergey Ryazanova6ececf2013-08-30 01:35:09 +04002631 !multicast && !authorized &&
Johannes Berg55182e42011-10-12 17:28:21 +02002632 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002633 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002634#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002635 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
Johannes Berg4c9451e2014-11-09 18:50:10 +02002636 sdata->name, hdr.addr1);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002637#endif
2638
2639 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2640
Johannes Berg4c9451e2014-11-09 18:50:10 +02002641 ret = -EPERM;
2642 goto free;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002643 }
2644
Johannes Berga729cff2011-11-06 14:13:34 +01002645 if (unlikely(!multicast && skb->sk &&
2646 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002647 struct sk_buff *ack_skb = skb_clone_sk(skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002648
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002649 if (ack_skb) {
Johannes Berga729cff2011-11-06 14:13:34 +01002650 unsigned long flags;
Tejun Heo9475af62013-02-27 17:04:59 -08002651 int id;
Johannes Berga729cff2011-11-06 14:13:34 +01002652
2653 spin_lock_irqsave(&local->ack_status_lock, flags);
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002654 id = idr_alloc(&local->ack_status_frames, ack_skb,
Tejun Heo9475af62013-02-27 17:04:59 -08002655 1, 0x10000, GFP_ATOMIC);
Johannes Berga729cff2011-11-06 14:13:34 +01002656 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2657
Tejun Heo9475af62013-02-27 17:04:59 -08002658 if (id >= 0) {
Johannes Berga729cff2011-11-06 14:13:34 +01002659 info_id = id;
2660 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
Johannes Berga729cff2011-11-06 14:13:34 +01002661 } else {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002662 kfree_skb(ack_skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002663 }
Johannes Berga729cff2011-11-06 14:13:34 +01002664 }
2665 }
2666
Helmut Schaa7e244702010-12-02 18:44:09 +01002667 /*
2668 * If the skb is shared we need to obtain our own copy.
2669 */
2670 if (skb_shared(skb)) {
Johannes Berga729cff2011-11-06 14:13:34 +01002671 struct sk_buff *tmp_skb = skb;
2672
2673 /* can't happen -- skb is a clone if info_id != 0 */
2674 WARN_ON(info_id);
2675
Felix Fietkauf8a0a782010-12-18 19:30:50 +01002676 skb = skb_clone(skb, GFP_ATOMIC);
Helmut Schaa7e244702010-12-02 18:44:09 +01002677 kfree_skb(tmp_skb);
2678
Johannes Berg4c9451e2014-11-09 18:50:10 +02002679 if (!skb) {
2680 ret = -ENOMEM;
2681 goto free;
2682 }
Helmut Schaa7e244702010-12-02 18:44:09 +01002683 }
2684
Harvey Harrison065e96052008-06-22 16:45:27 -07002685 hdr.frame_control = fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002686 hdr.duration_id = 0;
2687 hdr.seq_ctrl = 0;
2688
2689 skip_header_bytes = ETH_HLEN;
2690 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2691 encaps_data = bridge_tunnel_header;
2692 encaps_len = sizeof(bridge_tunnel_header);
2693 skip_header_bytes -= 2;
Simon Hormane5c5d222013-03-28 13:38:25 +09002694 } else if (ethertype >= ETH_P_802_3_MIN) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002695 encaps_data = rfc1042_header;
2696 encaps_len = sizeof(rfc1042_header);
2697 skip_header_bytes -= 2;
2698 } else {
2699 encaps_data = NULL;
2700 encaps_len = 0;
2701 }
2702
2703 skb_pull(skb, skip_header_bytes);
Johannes Berg23c07522008-05-29 10:38:53 +02002704 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002705
Johannes Berg23c07522008-05-29 10:38:53 +02002706 /*
2707 * So we need to modify the skb header and hence need a copy of
2708 * that. The head_need variable above doesn't, so far, include
2709 * the needed header space that we don't need right away. If we
2710 * can, then we don't reallocate right now but only after the
2711 * frame arrives at the master device (if it does...)
2712 *
2713 * If we cannot, however, then we will reallocate to include all
2714 * the ever needed space. Also, if we need to reallocate it anyway,
2715 * make it big enough for everything we may ever need.
2716 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002717
David S. Miller3a5be7d2008-06-18 01:19:51 -07002718 if (head_need > 0 || skb_cloned(skb)) {
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002719 head_need += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02002720 head_need += local->tx_headroom;
2721 head_need = max_t(int, 0, head_need);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002722 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2723 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg1c963be2012-11-07 14:02:30 +01002724 skb = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002725 return ERR_PTR(-ENOMEM);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002726 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002727 }
2728
Felix Fietkaueae44302016-07-13 11:00:02 +02002729 if (encaps_data)
Johannes Berge2ebc742007-07-27 15:43:22 +02002730 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002731
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002732#ifdef CONFIG_MAC80211_MESH
Felix Fietkaueae44302016-07-13 11:00:02 +02002733 if (meshhdrlen > 0)
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002734 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002735#endif
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002736
Harvey Harrison065e96052008-06-22 16:45:27 -07002737 if (ieee80211_is_data_qos(fc)) {
Johannes Bergc29b9b92007-09-14 11:10:24 -04002738 __le16 *qos_control;
2739
Johannes Bergd58ff352017-06-16 14:29:23 +02002740 qos_control = skb_push(skb, 2);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002741 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2742 /*
2743 * Maybe we could actually set some fields here, for now just
2744 * initialise to zero to indicate no special operation.
2745 */
2746 *qos_control = 0;
2747 } else
2748 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2749
Zhang Shengjud57a5442016-03-03 01:16:56 +00002750 skb_reset_mac_header(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002751
Felix Fietkau489ee912010-12-18 19:30:48 +01002752 info = IEEE80211_SKB_CB(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002753 memset(info, 0, sizeof(*info));
2754
Johannes Berga729cff2011-11-06 14:13:34 +01002755 info->flags = info_flags;
2756 info->ack_frame_id = info_id;
Johannes Berg73c4e192014-11-09 18:50:09 +02002757 info->band = band;
Johannes Berga729cff2011-11-06 14:13:34 +01002758
Johannes Berg4c9451e2014-11-09 18:50:10 +02002759 return skb;
2760 free:
2761 kfree_skb(skb);
2762 return ERR_PTR(ret);
Johannes Berge2ebc742007-07-27 15:43:22 +02002763}
2764
Johannes Berg17c18bf2015-03-21 15:25:43 +01002765/*
2766 * fast-xmit overview
2767 *
2768 * The core idea of this fast-xmit is to remove per-packet checks by checking
2769 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2770 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2771 * much less work can be done per packet. For example, fragmentation must be
2772 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2773 * in the code here.
2774 *
2775 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2776 * header and other data to aid packet processing in ieee80211_xmit_fast().
2777 *
2778 * The most difficult part of this is that when any of these assumptions
2779 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2780 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2781 * since the per-packet code no longer checks the conditions. This is reflected
2782 * by the calls to these functions throughout the rest of the code, and must be
2783 * maintained if any of the TX path checks change.
2784 */
2785
2786void ieee80211_check_fast_xmit(struct sta_info *sta)
2787{
2788 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2789 struct ieee80211_local *local = sta->local;
2790 struct ieee80211_sub_if_data *sdata = sta->sdata;
2791 struct ieee80211_hdr *hdr = (void *)build.hdr;
2792 struct ieee80211_chanctx_conf *chanctx_conf;
2793 __le16 fc;
2794
Johannes Berg30686bf2015-06-02 21:39:54 +02002795 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002796 return;
2797
2798 /* Locking here protects both the pointer itself, and against concurrent
2799 * invocations winning data access races to, e.g., the key pointer that
2800 * is used.
2801 * Without it, the invocation of this function right after the key
2802 * pointer changes wouldn't be sufficient, as another CPU could access
2803 * the pointer, then stall, and then do the cache update after the CPU
2804 * that invalidated the key.
2805 * With the locking, such scenarios cannot happen as the check for the
2806 * key and the fast-tx assignment are done atomically, so the CPU that
2807 * modifies the key will either wait or other one will see the key
2808 * cleared/changed already.
2809 */
2810 spin_lock_bh(&sta->lock);
Johannes Berg30686bf2015-06-02 21:39:54 +02002811 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2812 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
Johannes Berg17c18bf2015-03-21 15:25:43 +01002813 sdata->vif.type == NL80211_IFTYPE_STATION)
2814 goto out;
2815
2816 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2817 goto out;
2818
2819 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2820 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
Felix Fietkauf7418bc2015-09-24 14:59:49 +02002821 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2822 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002823 goto out;
2824
2825 if (sdata->noack_map)
2826 goto out;
2827
2828 /* fast-xmit doesn't handle fragmentation at all */
Johannes Berg725b8122015-04-10 14:02:08 +02002829 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
Sara Sharonf3fe4e92016-10-18 23:12:11 +03002830 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002831 goto out;
2832
2833 rcu_read_lock();
2834 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2835 if (!chanctx_conf) {
2836 rcu_read_unlock();
2837 goto out;
2838 }
2839 build.band = chanctx_conf->def.chan->band;
2840 rcu_read_unlock();
2841
2842 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2843
2844 switch (sdata->vif.type) {
Johannes Berg3ffd8842015-04-14 10:28:37 +02002845 case NL80211_IFTYPE_ADHOC:
2846 /* DA SA BSSID */
2847 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2848 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2849 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2850 build.hdr_len = 24;
2851 break;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002852 case NL80211_IFTYPE_STATION:
2853 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2854 /* DA SA BSSID */
2855 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2856 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2857 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2858 build.hdr_len = 24;
2859 break;
2860 }
2861
2862 if (sdata->u.mgd.use_4addr) {
2863 /* non-regular ethertype cannot use the fastpath */
2864 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2865 IEEE80211_FCTL_TODS);
2866 /* RA TA DA SA */
2867 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2868 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2869 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2870 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2871 build.hdr_len = 30;
2872 break;
2873 }
2874 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2875 /* BSSID SA DA */
2876 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2877 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2878 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2879 build.hdr_len = 24;
2880 break;
2881 case NL80211_IFTYPE_AP_VLAN:
2882 if (sdata->wdev.use_4addr) {
2883 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2884 IEEE80211_FCTL_TODS);
2885 /* RA TA DA SA */
2886 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2887 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2888 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2889 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2890 build.hdr_len = 30;
2891 break;
2892 }
2893 /* fall through */
2894 case NL80211_IFTYPE_AP:
2895 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2896 /* DA BSSID SA */
2897 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2898 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2899 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2900 build.hdr_len = 24;
2901 break;
2902 default:
2903 /* not handled on fast-xmit */
2904 goto out;
2905 }
2906
2907 if (sta->sta.wme) {
2908 build.hdr_len += 2;
2909 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2910 }
2911
2912 /* We store the key here so there's no point in using rcu_dereference()
2913 * but that's fine because the code that changes the pointers will call
2914 * this function after doing so. For a single CPU that would be enough,
2915 * for multiple see the comment above.
2916 */
2917 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2918 if (!build.key)
2919 build.key = rcu_access_pointer(sdata->default_unicast_key);
2920 if (build.key) {
Johannes Berge495c242015-04-10 14:03:17 +02002921 bool gen_iv, iv_spc, mmic;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002922
2923 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2924 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
David Spinadel9de18d82017-12-01 13:50:52 +02002925 mmic = build.key->conf.flags &
2926 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
2927 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002928
2929 /* don't handle software crypto */
2930 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2931 goto out;
2932
2933 switch (build.key->conf.cipher) {
2934 case WLAN_CIPHER_SUITE_CCMP:
2935 case WLAN_CIPHER_SUITE_CCMP_256:
2936 /* add fixed key ID */
2937 if (gen_iv) {
2938 (build.hdr + build.hdr_len)[3] =
2939 0x20 | (build.key->conf.keyidx << 6);
2940 build.pn_offs = build.hdr_len;
2941 }
2942 if (gen_iv || iv_spc)
2943 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2944 break;
2945 case WLAN_CIPHER_SUITE_GCMP:
2946 case WLAN_CIPHER_SUITE_GCMP_256:
2947 /* add fixed key ID */
2948 if (gen_iv) {
2949 (build.hdr + build.hdr_len)[3] =
2950 0x20 | (build.key->conf.keyidx << 6);
2951 build.pn_offs = build.hdr_len;
2952 }
2953 if (gen_iv || iv_spc)
2954 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2955 break;
Johannes Berge495c242015-04-10 14:03:17 +02002956 case WLAN_CIPHER_SUITE_TKIP:
2957 /* cannot handle MMIC or IV generation in xmit-fast */
2958 if (mmic || gen_iv)
2959 goto out;
2960 if (iv_spc)
2961 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2962 break;
2963 case WLAN_CIPHER_SUITE_WEP40:
2964 case WLAN_CIPHER_SUITE_WEP104:
2965 /* cannot handle IV generation in fast-xmit */
2966 if (gen_iv)
2967 goto out;
2968 if (iv_spc)
2969 build.hdr_len += IEEE80211_WEP_IV_LEN;
2970 break;
2971 case WLAN_CIPHER_SUITE_AES_CMAC:
2972 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2973 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2974 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2975 WARN(1,
2976 "management cipher suite 0x%x enabled for data\n",
2977 build.key->conf.cipher);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002978 goto out;
Johannes Berge495c242015-04-10 14:03:17 +02002979 default:
2980 /* we don't know how to generate IVs for this at all */
2981 if (WARN_ON(gen_iv))
2982 goto out;
2983 /* pure hardware keys are OK, of course */
2984 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2985 break;
2986 /* cipher scheme might require space allocation */
2987 if (iv_spc &&
2988 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2989 goto out;
2990 if (iv_spc)
2991 build.hdr_len += build.key->conf.iv_len;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002992 }
2993
2994 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2995 }
2996
2997 hdr->frame_control = fc;
2998
2999 memcpy(build.hdr + build.hdr_len,
3000 rfc1042_header, sizeof(rfc1042_header));
3001 build.hdr_len += sizeof(rfc1042_header);
3002
3003 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3004 /* if the kmemdup fails, continue w/o fast_tx */
3005 if (!fast_tx)
3006 goto out;
3007
3008 out:
3009 /* we might have raced against another call to this function */
3010 old = rcu_dereference_protected(sta->fast_tx,
3011 lockdep_is_held(&sta->lock));
3012 rcu_assign_pointer(sta->fast_tx, fast_tx);
3013 if (old)
3014 kfree_rcu(old, rcu_head);
3015 spin_unlock_bh(&sta->lock);
3016}
3017
3018void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3019{
3020 struct sta_info *sta;
3021
3022 rcu_read_lock();
3023 list_for_each_entry_rcu(sta, &local->sta_list, list)
3024 ieee80211_check_fast_xmit(sta);
3025 rcu_read_unlock();
3026}
3027
3028void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3029{
3030 struct ieee80211_local *local = sdata->local;
3031 struct sta_info *sta;
3032
3033 rcu_read_lock();
3034
3035 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3036 if (sdata != sta->sdata &&
3037 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3038 continue;
3039 ieee80211_check_fast_xmit(sta);
3040 }
3041
3042 rcu_read_unlock();
3043}
3044
3045void ieee80211_clear_fast_xmit(struct sta_info *sta)
3046{
3047 struct ieee80211_fast_tx *fast_tx;
3048
3049 spin_lock_bh(&sta->lock);
3050 fast_tx = rcu_dereference_protected(sta->fast_tx,
3051 lockdep_is_held(&sta->lock));
3052 RCU_INIT_POINTER(sta->fast_tx, NULL);
3053 spin_unlock_bh(&sta->lock);
3054
3055 if (fast_tx)
3056 kfree_rcu(fast_tx, rcu_head);
3057}
3058
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003059static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3060 struct sk_buff *skb, int headroom,
3061 int *subframe_len)
3062{
3063 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3064 int padding = (4 - amsdu_len) & 3;
3065
3066 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3067 I802_DEBUG_INC(local->tx_expand_skb_head);
3068
3069 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3070 wiphy_debug(local->hw.wiphy,
3071 "failed to reallocate TX buffer\n");
3072 return false;
3073 }
3074 }
3075
3076 if (padding) {
3077 *subframe_len += padding;
Johannes Bergb080db52017-06-16 14:29:19 +02003078 skb_put_zero(skb, padding);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003079 }
3080
3081 return true;
3082}
3083
3084static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3085 struct ieee80211_fast_tx *fast_tx,
3086 struct sk_buff *skb)
3087{
3088 struct ieee80211_local *local = sdata->local;
3089 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3090 struct ieee80211_hdr *hdr;
Michael Braun06f2bb12016-10-15 13:28:18 +02003091 struct ethhdr *amsdu_hdr;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003092 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3093 int subframe_len = skb->len - hdr_len;
3094 void *data;
Michael Braun06f2bb12016-10-15 13:28:18 +02003095 u8 *qc, *h_80211_src, *h_80211_dst;
Michael Brauna3e2f4b2016-10-15 13:28:19 +02003096 const u8 *bssid;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003097
3098 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3099 return false;
3100
3101 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3102 return true;
3103
Michael Braun06f2bb12016-10-15 13:28:18 +02003104 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr),
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003105 &subframe_len))
3106 return false;
3107
Michael Braun06f2bb12016-10-15 13:28:18 +02003108 data = skb_push(skb, sizeof(*amsdu_hdr));
3109 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003110 hdr = data;
Michael Braun06f2bb12016-10-15 13:28:18 +02003111 amsdu_hdr = data + hdr_len;
3112 /* h_80211_src/dst is addr* field within hdr */
3113 h_80211_src = data + fast_tx->sa_offs;
3114 h_80211_dst = data + fast_tx->da_offs;
3115
3116 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3117 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3118 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3119
Michael Brauna3e2f4b2016-10-15 13:28:19 +02003120 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3121 * fields needs to be changed to BSSID for A-MSDU frames depending
3122 * on FromDS/ToDS values.
3123 */
3124 switch (sdata->vif.type) {
3125 case NL80211_IFTYPE_STATION:
3126 bssid = sdata->u.mgd.bssid;
3127 break;
3128 case NL80211_IFTYPE_AP:
3129 case NL80211_IFTYPE_AP_VLAN:
3130 bssid = sdata->vif.addr;
3131 break;
3132 default:
3133 bssid = NULL;
3134 }
3135
3136 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3137 ether_addr_copy(h_80211_src, bssid);
3138
3139 if (bssid && ieee80211_has_tods(hdr->frame_control))
3140 ether_addr_copy(h_80211_dst, bssid);
3141
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003142 qc = ieee80211_get_qos_ctl(hdr);
3143 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3144
3145 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3146
3147 return true;
3148}
3149
3150static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3151 struct sta_info *sta,
3152 struct ieee80211_fast_tx *fast_tx,
3153 struct sk_buff *skb)
3154{
3155 struct ieee80211_local *local = sdata->local;
Michal Kaziorfa962b92016-05-19 10:37:49 +02003156 struct fq *fq = &local->fq;
3157 struct fq_tin *tin;
3158 struct fq_flow *flow;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003159 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3160 struct ieee80211_txq *txq = sta->sta.txq[tid];
3161 struct txq_info *txqi;
3162 struct sk_buff **frag_tail, *head;
3163 int subframe_len = skb->len - ETH_ALEN;
3164 u8 max_subframes = sta->sta.max_amsdu_subframes;
3165 int max_frags = local->hw.max_tx_fragments;
3166 int max_amsdu_len = sta->sta.max_amsdu_len;
3167 __be16 len;
3168 void *data;
3169 bool ret = false;
Michal Kaziorfa962b92016-05-19 10:37:49 +02003170 unsigned int orig_len;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003171 int n = 1, nfrags;
3172
3173 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3174 return false;
3175
3176 if (!txq)
3177 return false;
3178
3179 txqi = to_txq_info(txq);
3180 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3181 return false;
3182
3183 if (sta->sta.max_rc_amsdu_len)
3184 max_amsdu_len = min_t(int, max_amsdu_len,
3185 sta->sta.max_rc_amsdu_len);
3186
Michal Kaziorfa962b92016-05-19 10:37:49 +02003187 spin_lock_bh(&fq->lock);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003188
Michal Kaziorfa962b92016-05-19 10:37:49 +02003189 /* TODO: Ideally aggregation should be done on dequeue to remain
3190 * responsive to environment changes.
3191 */
3192
3193 tin = &txqi->tin;
3194 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3195 head = skb_peek_tail(&flow->queue);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003196 if (!head)
3197 goto out;
3198
Michal Kaziorfa962b92016-05-19 10:37:49 +02003199 orig_len = head->len;
3200
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003201 if (skb->len + head->len > max_amsdu_len)
3202 goto out;
3203
3204 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3205 goto out;
3206
3207 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3208 nfrags += 1 + skb_shinfo(head)->nr_frags;
3209 frag_tail = &skb_shinfo(head)->frag_list;
3210 while (*frag_tail) {
3211 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3212 frag_tail = &(*frag_tail)->next;
3213 n++;
3214 }
3215
3216 if (max_subframes && n > max_subframes)
3217 goto out;
3218
3219 if (max_frags && nfrags > max_frags)
3220 goto out;
3221
3222 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3223 &subframe_len))
3224 goto out;
3225
3226 ret = true;
3227 data = skb_push(skb, ETH_ALEN + 2);
3228 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3229
3230 data += 2 * ETH_ALEN;
3231 len = cpu_to_be16(subframe_len);
3232 memcpy(data, &len, 2);
3233 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3234
3235 head->len += skb->len;
3236 head->data_len += skb->len;
3237 *frag_tail = skb;
3238
Michal Kaziorfa962b92016-05-19 10:37:49 +02003239 flow->backlog += head->len - orig_len;
3240 tin->backlog_bytes += head->len - orig_len;
3241
3242 fq_recalc_backlog(fq, tin, flow);
3243
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003244out:
Michal Kaziorfa962b92016-05-19 10:37:49 +02003245 spin_unlock_bh(&fq->lock);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003246
3247 return ret;
3248}
3249
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003250/*
3251 * Can be called while the sta lock is held. Anything that can cause packets to
3252 * be generated will cause deadlock!
3253 */
3254static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3255 struct sta_info *sta, u8 pn_offs,
3256 struct ieee80211_key *key,
3257 struct sk_buff *skb)
3258{
3259 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3260 struct ieee80211_hdr *hdr = (void *)skb->data;
3261 u8 tid = IEEE80211_NUM_TIDS;
3262
3263 if (key)
3264 info->control.hw_key = &key->conf;
3265
3266 ieee80211_tx_stats(skb->dev, skb->len);
3267
3268 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3269 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003270 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3271 } else {
3272 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3273 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3274 sdata->sequence_number += 0x10;
3275 }
3276
3277 if (skb_shinfo(skb)->gso_size)
3278 sta->tx_stats.msdu[tid] +=
3279 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3280 else
3281 sta->tx_stats.msdu[tid]++;
3282
3283 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3284
3285 /* statistics normally done by ieee80211_tx_h_stats (but that
3286 * has to consider fragmentation, so is more complex)
3287 */
3288 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3289 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3290
3291 if (pn_offs) {
3292 u64 pn;
3293 u8 *crypto_hdr = skb->data + pn_offs;
3294
3295 switch (key->conf.cipher) {
3296 case WLAN_CIPHER_SUITE_CCMP:
3297 case WLAN_CIPHER_SUITE_CCMP_256:
3298 case WLAN_CIPHER_SUITE_GCMP:
3299 case WLAN_CIPHER_SUITE_GCMP_256:
3300 pn = atomic64_inc_return(&key->conf.tx_pn);
3301 crypto_hdr[0] = pn;
3302 crypto_hdr[1] = pn >> 8;
3303 crypto_hdr[4] = pn >> 16;
3304 crypto_hdr[5] = pn >> 24;
3305 crypto_hdr[6] = pn >> 32;
3306 crypto_hdr[7] = pn >> 40;
3307 break;
3308 }
3309 }
3310}
3311
Johannes Berg17c18bf2015-03-21 15:25:43 +01003312static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003313 struct sta_info *sta,
Johannes Berg17c18bf2015-03-21 15:25:43 +01003314 struct ieee80211_fast_tx *fast_tx,
3315 struct sk_buff *skb)
3316{
3317 struct ieee80211_local *local = sdata->local;
3318 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3319 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3320 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3321 struct ethhdr eth;
Johannes Berg35f432a2017-01-02 11:19:29 +01003322 struct ieee80211_tx_info *info;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003323 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3324 struct ieee80211_tx_data tx;
3325 ieee80211_tx_result r;
3326 struct tid_ampdu_tx *tid_tx = NULL;
3327 u8 tid = IEEE80211_NUM_TIDS;
3328
3329 /* control port protocol needs a lot of special handling */
3330 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3331 return false;
3332
3333 /* only RFC 1042 SNAP */
3334 if (ethertype < ETH_P_802_3_MIN)
3335 return false;
3336
3337 /* don't handle TX status request here either */
3338 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3339 return false;
3340
3341 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3342 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3343 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
Johannes Berg472be002015-06-09 16:45:08 +02003344 if (tid_tx) {
3345 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3346 return false;
3347 if (tid_tx->timeout)
3348 tid_tx->last_tx = jiffies;
3349 }
Johannes Berg17c18bf2015-03-21 15:25:43 +01003350 }
3351
3352 /* after this point (skb is modified) we cannot return false */
3353
3354 if (skb_shared(skb)) {
3355 struct sk_buff *tmp_skb = skb;
3356
3357 skb = skb_clone(skb, GFP_ATOMIC);
3358 kfree_skb(tmp_skb);
3359
3360 if (!skb)
3361 return true;
3362 }
3363
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003364 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3365 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3366 return true;
3367
Johannes Berg17c18bf2015-03-21 15:25:43 +01003368 /* will not be crypto-handled beyond what we do here, so use false
3369 * as the may-encrypt argument for the resize to not account for
3370 * more room than we already have in 'extra_head'
3371 */
3372 if (unlikely(ieee80211_skb_resize(sdata, skb,
3373 max_t(int, extra_head + hw_headroom -
3374 skb_headroom(skb), 0),
3375 false))) {
3376 kfree_skb(skb);
3377 return true;
3378 }
3379
3380 memcpy(&eth, skb->data, ETH_HLEN - 2);
Johannes Bergd58ff352017-06-16 14:29:23 +02003381 hdr = skb_push(skb, extra_head);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003382 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3383 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3384 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3385
Johannes Berg35f432a2017-01-02 11:19:29 +01003386 info = IEEE80211_SKB_CB(skb);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003387 memset(info, 0, sizeof(*info));
3388 info->band = fast_tx->band;
3389 info->control.vif = &sdata->vif;
3390 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3391 IEEE80211_TX_CTL_DONTFRAG |
3392 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003393 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003394
Felix Fietkaua786f962016-11-04 10:27:54 +01003395 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3396 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3397 *ieee80211_get_qos_ctl(hdr) = tid;
3398 }
3399
Johannes Berg17c18bf2015-03-21 15:25:43 +01003400 __skb_queue_head_init(&tx.skbs);
3401
3402 tx.flags = IEEE80211_TX_UNICAST;
3403 tx.local = local;
3404 tx.sdata = sdata;
3405 tx.sta = sta;
3406 tx.key = fast_tx->key;
3407
Johannes Berg30686bf2015-06-02 21:39:54 +02003408 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
Johannes Berg17c18bf2015-03-21 15:25:43 +01003409 tx.skb = skb;
3410 r = ieee80211_tx_h_rate_ctrl(&tx);
3411 skb = tx.skb;
3412 tx.skb = NULL;
3413
3414 if (r != TX_CONTINUE) {
3415 if (r != TX_QUEUED)
3416 kfree_skb(skb);
3417 return true;
3418 }
3419 }
3420
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003421 if (ieee80211_queue_skb(local, sdata, sta, skb))
3422 return true;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003423
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003424 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3425 fast_tx->key, skb);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003426
3427 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3428 sdata = container_of(sdata->bss,
3429 struct ieee80211_sub_if_data, u.ap);
3430
3431 __skb_queue_tail(&tx.skbs, skb);
3432 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3433 return true;
3434}
3435
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003436struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3437 struct ieee80211_txq *txq)
3438{
3439 struct ieee80211_local *local = hw_to_local(hw);
3440 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3441 struct ieee80211_hdr *hdr;
3442 struct sk_buff *skb = NULL;
3443 struct fq *fq = &local->fq;
3444 struct fq_tin *tin = &txqi->tin;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003445 struct ieee80211_tx_info *info;
3446 struct ieee80211_tx_data tx;
3447 ieee80211_tx_result r;
Johannes Berg53168212017-06-22 12:20:30 +02003448 struct ieee80211_vif *vif;
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003449
3450 spin_lock_bh(&fq->lock);
3451
3452 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3453 goto out;
3454
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003455 /* Make sure fragments stay together. */
3456 skb = __skb_dequeue(&txqi->frags);
3457 if (skb)
3458 goto out;
3459
3460begin:
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003461 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3462 if (!skb)
3463 goto out;
3464
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003465 hdr = (struct ieee80211_hdr *)skb->data;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003466 info = IEEE80211_SKB_CB(skb);
3467
3468 memset(&tx, 0, sizeof(tx));
3469 __skb_queue_head_init(&tx.skbs);
3470 tx.local = local;
3471 tx.skb = skb;
3472 tx.sdata = vif_to_sdata(info->control.vif);
3473
3474 if (txq->sta)
3475 tx.sta = container_of(txq->sta, struct sta_info, sta);
3476
3477 /*
3478 * The key can be removed while the packet was queued, so need to call
3479 * this here to get the current key.
3480 */
3481 r = ieee80211_tx_h_select_key(&tx);
3482 if (r != TX_CONTINUE) {
3483 ieee80211_free_txskb(&local->hw, skb);
3484 goto begin;
3485 }
3486
Felix Fietkauc1f4c9e2016-11-04 10:27:52 +01003487 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3488 info->flags |= IEEE80211_TX_CTL_AMPDU;
3489 else
3490 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3491
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003492 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003493 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3494 sta);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003495 u8 pn_offs = 0;
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003496
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003497 if (tx.key &&
3498 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3499 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3500
3501 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3502 tx.key, skb);
3503 } else {
3504 if (invoke_tx_handlers_late(&tx))
3505 goto begin;
3506
3507 skb = __skb_dequeue(&tx.skbs);
3508
3509 if (!skb_queue_empty(&tx.skbs))
3510 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003511 }
3512
Johannes Berg1e1430d2016-10-04 09:22:19 +02003513 if (skb && skb_has_frag_list(skb) &&
3514 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3515 if (skb_linearize(skb)) {
3516 ieee80211_free_txskb(&local->hw, skb);
3517 goto begin;
3518 }
3519 }
3520
Johannes Berg53168212017-06-22 12:20:30 +02003521 switch (tx.sdata->vif.type) {
3522 case NL80211_IFTYPE_MONITOR:
3523 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3524 vif = &tx.sdata->vif;
3525 break;
3526 }
3527 tx.sdata = rcu_dereference(local->monitor_sdata);
3528 if (tx.sdata) {
3529 vif = &tx.sdata->vif;
3530 info->hw_queue =
3531 vif->hw_queue[skb_get_queue_mapping(skb)];
3532 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3533 ieee80211_free_txskb(&local->hw, skb);
3534 goto begin;
3535 } else {
3536 vif = NULL;
3537 }
3538 break;
3539 case NL80211_IFTYPE_AP_VLAN:
3540 tx.sdata = container_of(tx.sdata->bss,
3541 struct ieee80211_sub_if_data, u.ap);
3542 /* fall through */
3543 default:
3544 vif = &tx.sdata->vif;
3545 break;
3546 }
3547
3548 IEEE80211_SKB_CB(skb)->control.vif = vif;
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003549out:
3550 spin_unlock_bh(&fq->lock);
3551
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003552 return skb;
3553}
3554EXPORT_SYMBOL(ieee80211_tx_dequeue);
3555
Johannes Berg4c9451e2014-11-09 18:50:10 +02003556void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3557 struct net_device *dev,
3558 u32 info_flags)
3559{
3560 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg97ffe752015-03-21 09:13:45 +01003561 struct sta_info *sta;
Johannes Berg80616c02015-04-14 14:50:41 +02003562 struct sk_buff *next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003563
3564 if (unlikely(skb->len < ETH_HLEN)) {
3565 kfree_skb(skb);
3566 return;
3567 }
3568
3569 rcu_read_lock();
3570
Johannes Berg2d981fd2015-04-10 14:10:10 +02003571 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3572 goto out_free;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003573
Johannes Berg17c18bf2015-03-21 15:25:43 +01003574 if (!IS_ERR_OR_NULL(sta)) {
3575 struct ieee80211_fast_tx *fast_tx;
3576
3577 fast_tx = rcu_dereference(sta->fast_tx);
3578
3579 if (fast_tx &&
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003580 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
Johannes Berg17c18bf2015-03-21 15:25:43 +01003581 goto out;
3582 }
3583
Johannes Berg80616c02015-04-14 14:50:41 +02003584 if (skb_is_gso(skb)) {
3585 struct sk_buff *segs;
Johannes Berg680a0da2015-04-13 16:58:25 +02003586
Johannes Berg80616c02015-04-14 14:50:41 +02003587 segs = skb_gso_segment(skb, 0);
3588 if (IS_ERR(segs)) {
Johannes Berg2d981fd2015-04-10 14:10:10 +02003589 goto out_free;
Johannes Berg80616c02015-04-14 14:50:41 +02003590 } else if (segs) {
3591 consume_skb(skb);
3592 skb = segs;
3593 }
3594 } else {
3595 /* we cannot process non-linear frames on this path */
3596 if (skb_linearize(skb)) {
3597 kfree_skb(skb);
3598 goto out;
3599 }
3600
3601 /* the frame could be fragmented, software-encrypted, and other
3602 * things so we cannot really handle checksum offload with it -
3603 * fix it up in software before we handle anything else.
3604 */
3605 if (skb->ip_summed == CHECKSUM_PARTIAL) {
Johannes Bergf603f1f2015-05-05 15:25:33 +02003606 skb_set_transport_header(skb,
3607 skb_checksum_start_offset(skb));
Johannes Berg80616c02015-04-14 14:50:41 +02003608 if (skb_checksum_help(skb))
3609 goto out_free;
3610 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02003611 }
3612
Johannes Berg80616c02015-04-14 14:50:41 +02003613 next = skb;
3614 while (next) {
3615 skb = next;
3616 next = skb->next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003617
Johannes Berg80616c02015-04-14 14:50:41 +02003618 skb->prev = NULL;
3619 skb->next = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003620
Johannes Berg80616c02015-04-14 14:50:41 +02003621 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3622 if (IS_ERR(skb))
3623 goto out;
3624
Johannes Berg5a490512015-04-22 17:10:38 +02003625 ieee80211_tx_stats(dev, skb->len);
Johannes Berg80616c02015-04-14 14:50:41 +02003626
3627 ieee80211_xmit(sdata, sta, skb);
3628 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02003629 goto out;
3630 out_free:
3631 kfree_skb(skb);
Johannes Berg4c9451e2014-11-09 18:50:10 +02003632 out:
3633 rcu_read_unlock();
3634}
3635
Michael Braunebceec82016-11-22 11:52:18 +01003636static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3637{
3638 struct ethhdr *eth;
3639 int err;
3640
3641 err = skb_ensure_writable(skb, ETH_HLEN);
3642 if (unlikely(err))
3643 return err;
3644
3645 eth = (void *)skb->data;
3646 ether_addr_copy(eth->h_dest, sta->sta.addr);
3647
3648 return 0;
3649}
3650
3651static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3652 struct net_device *dev)
3653{
3654 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3655 const struct ethhdr *eth = (void *)skb->data;
3656 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3657 __be16 ethertype;
3658
3659 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3660 return false;
3661
3662 switch (sdata->vif.type) {
3663 case NL80211_IFTYPE_AP_VLAN:
3664 if (sdata->u.vlan.sta)
3665 return false;
3666 if (sdata->wdev.use_4addr)
3667 return false;
3668 /* fall through */
3669 case NL80211_IFTYPE_AP:
3670 /* check runtime toggle for this bss */
3671 if (!sdata->bss->multicast_to_unicast)
3672 return false;
3673 break;
3674 default:
3675 return false;
3676 }
3677
3678 /* multicast to unicast conversion only for some payload */
3679 ethertype = eth->h_proto;
3680 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3681 ethertype = ethvlan->h_vlan_encapsulated_proto;
3682 switch (ethertype) {
3683 case htons(ETH_P_ARP):
3684 case htons(ETH_P_IP):
3685 case htons(ETH_P_IPV6):
3686 break;
3687 default:
3688 return false;
3689 }
3690
3691 return true;
3692}
3693
3694static void
3695ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3696 struct sk_buff_head *queue)
3697{
3698 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3699 struct ieee80211_local *local = sdata->local;
3700 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3701 struct sta_info *sta, *first = NULL;
3702 struct sk_buff *cloned_skb;
3703
3704 rcu_read_lock();
3705
3706 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3707 if (sdata != sta->sdata)
3708 /* AP-VLAN mismatch */
3709 continue;
3710 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3711 /* do not send back to source */
3712 continue;
3713 if (!first) {
3714 first = sta;
3715 continue;
3716 }
3717 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3718 if (!cloned_skb)
3719 goto multicast;
3720 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3721 dev_kfree_skb(cloned_skb);
3722 goto multicast;
3723 }
3724 __skb_queue_tail(queue, cloned_skb);
3725 }
3726
3727 if (likely(first)) {
3728 if (unlikely(ieee80211_change_da(skb, first)))
3729 goto multicast;
3730 __skb_queue_tail(queue, skb);
3731 } else {
3732 /* no STA connected, drop */
3733 kfree_skb(skb);
3734 skb = NULL;
3735 }
3736
3737 goto out;
3738multicast:
3739 __skb_queue_purge(queue);
3740 __skb_queue_tail(queue, skb);
3741out:
3742 rcu_read_unlock();
3743}
3744
Johannes Berg4c9451e2014-11-09 18:50:10 +02003745/**
3746 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3747 * @skb: packet to be sent
3748 * @dev: incoming interface
3749 *
3750 * On failure skb will be freed.
3751 */
Liad Kaufman24d342c2014-11-09 18:50:07 +02003752netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3753 struct net_device *dev)
3754{
Michael Braunebceec82016-11-22 11:52:18 +01003755 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
3756 struct sk_buff_head queue;
3757
3758 __skb_queue_head_init(&queue);
3759 ieee80211_convert_to_unicast(skb, dev, &queue);
3760 while ((skb = __skb_dequeue(&queue)))
3761 __ieee80211_subif_start_xmit(skb, dev, 0);
3762 } else {
3763 __ieee80211_subif_start_xmit(skb, dev, 0);
3764 }
3765
Liad Kaufman24d342c2014-11-09 18:50:07 +02003766 return NETDEV_TX_OK;
3767}
Johannes Berge2ebc742007-07-27 15:43:22 +02003768
Johannes Berg7528ec52014-11-09 18:50:11 +02003769struct sk_buff *
3770ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3771 struct sk_buff *skb, u32 info_flags)
3772{
3773 struct ieee80211_hdr *hdr;
3774 struct ieee80211_tx_data tx = {
3775 .local = sdata->local,
3776 .sdata = sdata,
3777 };
Johannes Berg97ffe752015-03-21 09:13:45 +01003778 struct sta_info *sta;
Johannes Berg7528ec52014-11-09 18:50:11 +02003779
3780 rcu_read_lock();
3781
Johannes Berg97ffe752015-03-21 09:13:45 +01003782 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3783 kfree_skb(skb);
3784 skb = ERR_PTR(-EINVAL);
3785 goto out;
3786 }
3787
3788 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
Johannes Berg7528ec52014-11-09 18:50:11 +02003789 if (IS_ERR(skb))
3790 goto out;
3791
3792 hdr = (void *)skb->data;
3793 tx.sta = sta_info_get(sdata, hdr->addr1);
3794 tx.skb = skb;
3795
3796 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3797 rcu_read_unlock();
3798 kfree_skb(skb);
3799 return ERR_PTR(-EINVAL);
3800 }
3801
3802out:
3803 rcu_read_unlock();
3804 return skb;
3805}
3806
Johannes Berge2530082008-05-17 00:57:14 +02003807/*
3808 * ieee80211_clear_tx_pending may not be called in a context where
3809 * it is possible that it packets could come in again.
3810 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003811void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3812{
Felix Fietkau1f98ab72012-11-10 03:44:14 +01003813 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01003814 int i;
Johannes Berge2ebc742007-07-27 15:43:22 +02003815
Felix Fietkau1f98ab72012-11-10 03:44:14 +01003816 for (i = 0; i < local->hw.queues; i++) {
3817 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3818 ieee80211_free_txskb(&local->hw, skb);
3819 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003820}
3821
Johannes Berg7bb45682011-02-24 14:42:06 +01003822/*
3823 * Returns false if the frame couldn't be transmitted but was queued instead,
3824 * which in this case means re-queued -- take as an indication to stop sending
3825 * more pending frames.
3826 */
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003827static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3828 struct sk_buff *skb)
3829{
3830 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3831 struct ieee80211_sub_if_data *sdata;
3832 struct sta_info *sta;
3833 struct ieee80211_hdr *hdr;
Johannes Berg7bb45682011-02-24 14:42:06 +01003834 bool result;
Johannes Berg55de9082012-07-26 17:24:39 +02003835 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003836
Johannes Berg5061b0c2009-07-14 00:33:34 +02003837 sdata = vif_to_sdata(info->control.vif);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003838
3839 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
Johannes Berg55de9082012-07-26 17:24:39 +02003840 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3841 if (unlikely(!chanctx_conf)) {
3842 dev_kfree_skb(skb);
3843 return true;
3844 }
Johannes Berg73c4e192014-11-09 18:50:09 +02003845 info->band = chanctx_conf->def.chan->band;
Johannes Berg7c107702015-03-20 14:18:27 +01003846 result = ieee80211_tx(sdata, NULL, skb, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003847 } else {
Johannes Berg252b86c2011-11-16 15:28:55 +01003848 struct sk_buff_head skbs;
3849
3850 __skb_queue_head_init(&skbs);
3851 __skb_queue_tail(&skbs, skb);
3852
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003853 hdr = (struct ieee80211_hdr *)skb->data;
Johannes Bergabe60632009-11-25 17:46:18 +01003854 sta = sta_info_get(sdata, hdr->addr1);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003855
Johannes Berg74e4dbf2011-11-16 15:28:57 +01003856 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003857 }
3858
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003859 return result;
3860}
3861
Johannes Berge2530082008-05-17 00:57:14 +02003862/*
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003863 * Transmit all pending packets. Called from tasklet.
Johannes Berge2530082008-05-17 00:57:14 +02003864 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003865void ieee80211_tx_pending(unsigned long data)
3866{
3867 struct ieee80211_local *local = (struct ieee80211_local *)data;
Johannes Berg2a577d92009-03-23 17:28:37 +01003868 unsigned long flags;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003869 int i;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003870 bool txok;
Johannes Berge2ebc742007-07-27 15:43:22 +02003871
Johannes Bergf0e72852009-03-23 17:28:36 +01003872 rcu_read_lock();
Johannes Berg2a577d92009-03-23 17:28:37 +01003873
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003874 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg176be722009-03-12 23:49:28 +01003875 for (i = 0; i < local->hw.queues; i++) {
Johannes Berg2a577d92009-03-23 17:28:37 +01003876 /*
3877 * If queue is stopped by something other than due to pending
3878 * frames, or we have no pending frames, proceed to next queue.
3879 */
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003880 if (local->queue_stop_reasons[i] ||
Johannes Berg2a577d92009-03-23 17:28:37 +01003881 skb_queue_empty(&local->pending[i]))
Johannes Berge2ebc742007-07-27 15:43:22 +02003882 continue;
Johannes Berge2530082008-05-17 00:57:14 +02003883
Johannes Berg2a577d92009-03-23 17:28:37 +01003884 while (!skb_queue_empty(&local->pending[i])) {
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003885 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003886 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003887
Johannes Berga7bc3762009-07-27 10:33:31 +02003888 if (WARN_ON(!info->control.vif)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02003889 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +02003890 continue;
3891 }
3892
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003893 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3894 flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003895
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003896 txok = ieee80211_tx_pending_skb(local, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003897 spin_lock_irqsave(&local->queue_stop_reason_lock,
3898 flags);
3899 if (!txok)
Johannes Berg2a577d92009-03-23 17:28:37 +01003900 break;
Johannes Berge2ebc742007-07-27 15:43:22 +02003901 }
Johannes Berg7236fe22010-03-22 13:42:43 -07003902
3903 if (skb_queue_empty(&local->pending[i]))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003904 ieee80211_propagate_queue_wake(local, i);
Johannes Berge2ebc742007-07-27 15:43:22 +02003905 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003906 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003907
Johannes Bergf0e72852009-03-23 17:28:36 +01003908 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003909}
3910
3911/* functions for drivers to get certain frames */
3912
Marco Porscheac70c12013-01-07 16:04:50 +01003913static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003914 struct ps_data *ps, struct sk_buff *skb,
3915 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02003916{
3917 u8 *pos, *tim;
3918 int aid0 = 0;
3919 int i, have_bits = 0, n1, n2;
3920
3921 /* Generate bitmap for TIM only if there are any STAs in power save
3922 * mode. */
Marco Porschd012a602012-10-10 12:39:50 -07003923 if (atomic_read(&ps->num_sta_ps) > 0)
Johannes Berge2ebc742007-07-27 15:43:22 +02003924 /* in the hope that this is faster than
3925 * checking byte-for-byte */
Weilong Chenf359d3f2013-12-18 15:44:16 +08003926 have_bits = !bitmap_empty((unsigned long *)ps->tim,
Johannes Berge2ebc742007-07-27 15:43:22 +02003927 IEEE80211_MAX_AID+1);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003928 if (!is_template) {
3929 if (ps->dtim_count == 0)
3930 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3931 else
3932 ps->dtim_count--;
3933 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003934
Johannes Berg4df864c2017-06-16 14:29:21 +02003935 tim = pos = skb_put(skb, 6);
Johannes Berge2ebc742007-07-27 15:43:22 +02003936 *pos++ = WLAN_EID_TIM;
3937 *pos++ = 4;
Marco Porschd012a602012-10-10 12:39:50 -07003938 *pos++ = ps->dtim_count;
Johannes Berg88600202012-02-13 15:17:18 +01003939 *pos++ = sdata->vif.bss_conf.dtim_period;
Johannes Berge2ebc742007-07-27 15:43:22 +02003940
Marco Porschd012a602012-10-10 12:39:50 -07003941 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
Johannes Berge2ebc742007-07-27 15:43:22 +02003942 aid0 = 1;
3943
Marco Porschd012a602012-10-10 12:39:50 -07003944 ps->dtim_bc_mc = aid0 == 1;
Christian Lamparter512119b2011-01-31 20:48:44 +02003945
Johannes Berge2ebc742007-07-27 15:43:22 +02003946 if (have_bits) {
3947 /* Find largest even number N1 so that bits numbered 1 through
3948 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3949 * (N2 + 1) x 8 through 2007 are 0. */
3950 n1 = 0;
3951 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
Marco Porschd012a602012-10-10 12:39:50 -07003952 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003953 n1 = i & 0xfe;
3954 break;
3955 }
3956 }
3957 n2 = n1;
3958 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
Marco Porschd012a602012-10-10 12:39:50 -07003959 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003960 n2 = i;
3961 break;
3962 }
3963 }
3964
3965 /* Bitmap control */
3966 *pos++ = n1 | aid0;
3967 /* Part Virt Bitmap */
Eliad Peller5220da32011-11-24 16:50:00 +02003968 skb_put(skb, n2 - n1);
Marco Porschd012a602012-10-10 12:39:50 -07003969 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
Johannes Berge2ebc742007-07-27 15:43:22 +02003970
3971 tim[1] = n2 - n1 + 4;
Johannes Berge2ebc742007-07-27 15:43:22 +02003972 } else {
3973 *pos++ = aid0; /* Bitmap control */
3974 *pos++ = 0; /* Part Virt Bitmap */
3975 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003976}
3977
Marco Porscheac70c12013-01-07 16:04:50 +01003978static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003979 struct ps_data *ps, struct sk_buff *skb,
3980 bool is_template)
Marco Porscheac70c12013-01-07 16:04:50 +01003981{
3982 struct ieee80211_local *local = sdata->local;
3983
3984 /*
3985 * Not very nice, but we want to allow the driver to call
3986 * ieee80211_beacon_get() as a response to the set_tim()
3987 * callback. That, however, is already invoked under the
3988 * sta_lock to guarantee consistent and race-free update
3989 * of the tim bitmap in mac80211 and the driver.
3990 */
3991 if (local->tim_in_locked_section) {
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003992 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Marco Porscheac70c12013-01-07 16:04:50 +01003993 } else {
Johannes Berg1b917312013-02-22 12:55:01 +01003994 spin_lock_bh(&local->tim_lock);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003995 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Johannes Berg1b917312013-02-22 12:55:01 +01003996 spin_unlock_bh(&local->tim_lock);
Marco Porscheac70c12013-01-07 16:04:50 +01003997 }
3998
3999 return 0;
4000}
4001
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004002static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4003 struct beacon_data *beacon)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004004{
4005 struct probe_resp *resp;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004006 u8 *beacon_data;
4007 size_t beacon_data_len;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004008 int i;
Michal Kazioraf296bd2014-06-05 14:21:36 +02004009 u8 count = beacon->csa_current_counter;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004010
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004011 switch (sdata->vif.type) {
4012 case NL80211_IFTYPE_AP:
4013 beacon_data = beacon->tail;
4014 beacon_data_len = beacon->tail_len;
4015 break;
4016 case NL80211_IFTYPE_ADHOC:
4017 beacon_data = beacon->head;
4018 beacon_data_len = beacon->head_len;
4019 break;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07004020 case NL80211_IFTYPE_MESH_POINT:
4021 beacon_data = beacon->head;
4022 beacon_data_len = beacon->head_len;
4023 break;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004024 default:
4025 return;
4026 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004027
Michal Kazioraf296bd2014-06-05 14:21:36 +02004028 rcu_read_lock();
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004029 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02004030 resp = rcu_dereference(sdata->u.ap.probe_resp);
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004031
Michal Kazioraf296bd2014-06-05 14:21:36 +02004032 if (beacon->csa_counter_offsets[i]) {
4033 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4034 beacon_data_len)) {
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004035 rcu_read_unlock();
4036 return;
4037 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02004038
4039 beacon_data[beacon->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004040 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02004041
4042 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4043 resp->data[resp->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004044 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02004045 rcu_read_unlock();
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004046}
4047
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004048static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4049{
4050 beacon->csa_current_counter--;
4051
4052 /* the counter should never reach 0 */
4053 WARN_ON_ONCE(!beacon->csa_current_counter);
4054
4055 return beacon->csa_current_counter;
4056}
4057
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004058u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4059{
4060 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Michal Kazioraf296bd2014-06-05 14:21:36 +02004061 struct beacon_data *beacon = NULL;
4062 u8 count = 0;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004063
Michal Kazioraf296bd2014-06-05 14:21:36 +02004064 rcu_read_lock();
4065
4066 if (sdata->vif.type == NL80211_IFTYPE_AP)
4067 beacon = rcu_dereference(sdata->u.ap.beacon);
4068 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4069 beacon = rcu_dereference(sdata->u.ibss.presp);
4070 else if (ieee80211_vif_is_mesh(&sdata->vif))
4071 beacon = rcu_dereference(sdata->u.mesh.beacon);
4072
4073 if (!beacon)
4074 goto unlock;
4075
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004076 count = __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004077
Michal Kazioraf296bd2014-06-05 14:21:36 +02004078unlock:
4079 rcu_read_unlock();
4080 return count;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004081}
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004082EXPORT_SYMBOL(ieee80211_csa_update_counter);
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004083
4084bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4085{
4086 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4087 struct beacon_data *beacon = NULL;
4088 u8 *beacon_data;
4089 size_t beacon_data_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004090 int ret = false;
4091
4092 if (!ieee80211_sdata_running(sdata))
4093 return false;
4094
4095 rcu_read_lock();
4096 if (vif->type == NL80211_IFTYPE_AP) {
4097 struct ieee80211_if_ap *ap = &sdata->u.ap;
4098
4099 beacon = rcu_dereference(ap->beacon);
4100 if (WARN_ON(!beacon || !beacon->tail))
4101 goto out;
4102 beacon_data = beacon->tail;
4103 beacon_data_len = beacon->tail_len;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004104 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4105 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4106
4107 beacon = rcu_dereference(ifibss->presp);
4108 if (!beacon)
4109 goto out;
4110
4111 beacon_data = beacon->head;
4112 beacon_data_len = beacon->head_len;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07004113 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4114 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4115
4116 beacon = rcu_dereference(ifmsh->beacon);
4117 if (!beacon)
4118 goto out;
4119
4120 beacon_data = beacon->head;
4121 beacon_data_len = beacon->head_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004122 } else {
4123 WARN_ON(1);
4124 goto out;
4125 }
4126
Michal Kazior10d78f22014-06-05 14:21:37 +02004127 if (!beacon->csa_counter_offsets[0])
4128 goto out;
4129
Michal Kazioraf296bd2014-06-05 14:21:36 +02004130 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004131 goto out;
4132
Michal Kazioraf296bd2014-06-05 14:21:36 +02004133 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004134 ret = true;
4135 out:
4136 rcu_read_unlock();
4137
4138 return ret;
4139}
4140EXPORT_SYMBOL(ieee80211_csa_is_complete);
4141
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004142static struct sk_buff *
4143__ieee80211_beacon_get(struct ieee80211_hw *hw,
4144 struct ieee80211_vif *vif,
4145 struct ieee80211_mutable_offsets *offs,
4146 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02004147{
4148 struct ieee80211_local *local = hw_to_local(hw);
Michal Kazioraf296bd2014-06-05 14:21:36 +02004149 struct beacon_data *beacon = NULL;
Johannes Berg9d139c82008-07-09 14:40:37 +02004150 struct sk_buff *skb = NULL;
Johannes Berge039fa42008-05-15 12:55:29 +02004151 struct ieee80211_tx_info *info;
Johannes Berge2ebc742007-07-27 15:43:22 +02004152 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg57fbcce2016-04-12 15:56:15 +02004153 enum nl80211_band band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004154 struct ieee80211_tx_rate_control txrc;
Johannes Berg55de9082012-07-26 17:24:39 +02004155 struct ieee80211_chanctx_conf *chanctx_conf;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004156 int csa_off_base = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01004157
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004158 rcu_read_lock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004159
Johannes Berg32bfd352007-12-19 01:31:26 +01004160 sdata = vif_to_sdata(vif);
Johannes Berg55de9082012-07-26 17:24:39 +02004161 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berge2ebc742007-07-27 15:43:22 +02004162
Johannes Berg55de9082012-07-26 17:24:39 +02004163 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
Felix Fietkaueb3e5542011-01-24 19:28:49 +01004164 goto out;
4165
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004166 if (offs)
4167 memset(offs, 0, sizeof(*offs));
Johannes Bergeddcbb942009-10-29 08:30:35 +01004168
Johannes Berg05c914f2008-09-11 00:01:58 +02004169 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Marco Porschd012a602012-10-10 12:39:50 -07004170 struct ieee80211_if_ap *ap = &sdata->u.ap;
Marco Porschd012a602012-10-10 12:39:50 -07004171
Michal Kazioraf296bd2014-06-05 14:21:36 +02004172 beacon = rcu_dereference(ap->beacon);
Dan Carpenter3ad97fb2011-02-07 22:03:35 +03004173 if (beacon) {
Michal Kazior10d78f22014-06-05 14:21:37 +02004174 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004175 if (!is_template)
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004176 __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004177
4178 ieee80211_set_csa(sdata, beacon);
4179 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004180
Johannes Berg902acc72008-02-23 15:17:19 +01004181 /*
4182 * headroom, head length,
4183 * tail length and maximum TIM length
4184 */
4185 skb = dev_alloc_skb(local->tx_headroom +
4186 beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01004187 beacon->tail_len + 256 +
4188 local->hw.extra_beacon_tailroom);
Johannes Berg902acc72008-02-23 15:17:19 +01004189 if (!skb)
4190 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004191
Johannes Berg902acc72008-02-23 15:17:19 +01004192 skb_reserve(skb, local->tx_headroom);
Johannes Berg59ae1d12017-06-16 14:29:20 +02004193 skb_put_data(skb, beacon->head, beacon->head_len);
Johannes Berg902acc72008-02-23 15:17:19 +01004194
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004195 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4196 is_template);
Johannes Berg902acc72008-02-23 15:17:19 +01004197
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004198 if (offs) {
4199 offs->tim_offset = beacon->head_len;
4200 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004201
4202 /* for AP the csa offsets are from tail */
4203 csa_off_base = skb->len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004204 }
Johannes Bergeddcbb942009-10-29 08:30:35 +01004205
Johannes Berg902acc72008-02-23 15:17:19 +01004206 if (beacon->tail)
Johannes Berg59ae1d12017-06-16 14:29:20 +02004207 skb_put_data(skb, beacon->tail,
4208 beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02004209 } else
4210 goto out;
Johannes Berg05c914f2008-09-11 00:01:58 +02004211 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg46900292009-02-15 12:44:28 +01004212 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
Johannes Berg9d139c82008-07-09 14:40:37 +02004213 struct ieee80211_hdr *hdr;
Johannes Berg902acc72008-02-23 15:17:19 +01004214
Michal Kazioraf296bd2014-06-05 14:21:36 +02004215 beacon = rcu_dereference(ifibss->presp);
4216 if (!beacon)
Johannes Berg9d139c82008-07-09 14:40:37 +02004217 goto out;
4218
Michal Kazior10d78f22014-06-05 14:21:37 +02004219 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004220 if (!is_template)
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004221 __ieee80211_csa_update_counter(beacon);
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004222
Michal Kazioraf296bd2014-06-05 14:21:36 +02004223 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004224 }
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004225
Michal Kazioraf296bd2014-06-05 14:21:36 +02004226 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01004227 local->hw.extra_beacon_tailroom);
Johannes Berg9d139c82008-07-09 14:40:37 +02004228 if (!skb)
4229 goto out;
Johannes Bergc3ffeab2013-03-07 20:54:29 +01004230 skb_reserve(skb, local->tx_headroom);
Johannes Berg59ae1d12017-06-16 14:29:20 +02004231 skb_put_data(skb, beacon->head, beacon->head_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02004232
4233 hdr = (struct ieee80211_hdr *) skb->data;
Harvey Harrisone7827a72008-07-15 18:44:13 -07004234 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4235 IEEE80211_STYPE_BEACON);
Johannes Berg902acc72008-02-23 15:17:19 +01004236 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
Javier Cardonadbf498f2012-03-31 11:31:32 -07004237 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Johannes Berg472dbc42008-09-11 00:01:49 +02004238
Michal Kazioraf296bd2014-06-05 14:21:36 +02004239 beacon = rcu_dereference(ifmsh->beacon);
4240 if (!beacon)
Johannes Bergac1bd842011-01-18 13:45:32 +01004241 goto out;
Johannes Bergac1bd842011-01-18 13:45:32 +01004242
Michal Kazior10d78f22014-06-05 14:21:37 +02004243 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004244 if (!is_template)
4245 /* TODO: For mesh csa_counter is in TU, so
4246 * decrementing it by one isn't correct, but
4247 * for now we leave it consistent with overall
4248 * mac80211's behavior.
4249 */
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004250 __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004251
Michal Kazioraf296bd2014-06-05 14:21:36 +02004252 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004253 }
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07004254
Javier Cardonadbf498f2012-03-31 11:31:32 -07004255 if (ifmsh->sync_ops)
Masashi Honma445cd452016-12-08 10:15:51 +09004256 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
Javier Cardonadbf498f2012-03-31 11:31:32 -07004257
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -07004258 skb = dev_alloc_skb(local->tx_headroom +
Michal Kazioraf296bd2014-06-05 14:21:36 +02004259 beacon->head_len +
Marco Porsch3f52b7e2013-01-30 18:14:08 +01004260 256 + /* TIM IE */
Michal Kazioraf296bd2014-06-05 14:21:36 +02004261 beacon->tail_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01004262 local->hw.extra_beacon_tailroom);
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01004263 if (!skb)
4264 goto out;
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08004265 skb_reserve(skb, local->tx_headroom);
Johannes Berg59ae1d12017-06-16 14:29:20 +02004266 skb_put_data(skb, beacon->head, beacon->head_len);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004267 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4268
4269 if (offs) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02004270 offs->tim_offset = beacon->head_len;
4271 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004272 }
4273
Johannes Berg59ae1d12017-06-16 14:29:20 +02004274 skb_put_data(skb, beacon->tail, beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02004275 } else {
4276 WARN_ON(1);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004277 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02004278 }
4279
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004280 /* CSA offsets */
Michal Kazioraf296bd2014-06-05 14:21:36 +02004281 if (offs && beacon) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004282 int i;
4283
4284 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02004285 u16 csa_off = beacon->csa_counter_offsets[i];
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004286
4287 if (!csa_off)
4288 continue;
4289
4290 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4291 }
4292 }
4293
Johannes Berg4bf88532012-11-09 11:39:59 +01004294 band = chanctx_conf->def.chan->band;
Johannes Berg55de9082012-07-26 17:24:39 +02004295
Johannes Berge039fa42008-05-15 12:55:29 +02004296 info = IEEE80211_SKB_CB(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02004297
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004298 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004299 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Berge039fa42008-05-15 12:55:29 +02004300 info->band = band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004301
4302 memset(&txrc, 0, sizeof(txrc));
4303 txrc.hw = hw;
Johannes Berge31583c2012-07-26 14:07:46 +02004304 txrc.sband = local->hw.wiphy->bands[band];
Jouni Malinene00cfce2009-12-29 12:59:19 +02004305 txrc.bss_conf = &sdata->vif.bss_conf;
4306 txrc.skb = skb;
4307 txrc.reported_rate.idx = -1;
Jouni Malinen37eb0b12010-01-06 13:09:08 +02004308 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
Felix Fietkau8f0729b2010-11-11 15:07:23 +01004309 txrc.bss = true;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004310 rate_control_get_rate(sdata, NULL, &txrc);
Johannes Berge039fa42008-05-15 12:55:29 +02004311
4312 info->control.vif = vif;
Johannes Bergf591fa52008-07-10 11:21:26 +02004313
John W. Linvillea472e712010-05-06 14:45:17 -04004314 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4315 IEEE80211_TX_CTL_ASSIGN_SEQ |
4316 IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge6a98542008-10-21 12:40:02 +02004317 out:
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004318 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004319 return skb;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004320
4321}
4322
4323struct sk_buff *
4324ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4325 struct ieee80211_vif *vif,
4326 struct ieee80211_mutable_offsets *offs)
4327{
4328 return __ieee80211_beacon_get(hw, vif, offs, true);
4329}
4330EXPORT_SYMBOL(ieee80211_beacon_get_template);
4331
4332struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4333 struct ieee80211_vif *vif,
4334 u16 *tim_offset, u16 *tim_length)
4335{
4336 struct ieee80211_mutable_offsets offs = {};
4337 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
Helmut Schaa35afa582015-09-09 09:46:32 +02004338 struct sk_buff *copy;
4339 struct ieee80211_supported_band *sband;
4340 int shift;
4341
4342 if (!bcn)
4343 return bcn;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004344
4345 if (tim_offset)
4346 *tim_offset = offs.tim_offset;
4347
4348 if (tim_length)
4349 *tim_length = offs.tim_length;
4350
Helmut Schaa35afa582015-09-09 09:46:32 +02004351 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4352 !hw_to_local(hw)->monitors)
4353 return bcn;
4354
4355 /* send a copy to monitor interfaces */
4356 copy = skb_copy(bcn, GFP_ATOMIC);
4357 if (!copy)
4358 return bcn;
4359
4360 shift = ieee80211_vif_get_shift(vif);
Mohammed Shafi Shajakhan21a8e9d2017-04-27 12:45:38 +05304361 sband = ieee80211_get_sband(vif_to_sdata(vif));
4362 if (!sband)
4363 return bcn;
4364
Helmut Schaa35afa582015-09-09 09:46:32 +02004365 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4366
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004367 return bcn;
Johannes Berge2ebc742007-07-27 15:43:22 +02004368}
Johannes Bergeddcbb942009-10-29 08:30:35 +01004369EXPORT_SYMBOL(ieee80211_beacon_get_tim);
Johannes Berge2ebc742007-07-27 15:43:22 +02004370
Arik Nemtsov02945822011-11-10 11:28:57 +02004371struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4372 struct ieee80211_vif *vif)
4373{
4374 struct ieee80211_if_ap *ap = NULL;
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004375 struct sk_buff *skb = NULL;
4376 struct probe_resp *presp = NULL;
Arik Nemtsov02945822011-11-10 11:28:57 +02004377 struct ieee80211_hdr *hdr;
4378 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4379
4380 if (sdata->vif.type != NL80211_IFTYPE_AP)
4381 return NULL;
4382
4383 rcu_read_lock();
4384
4385 ap = &sdata->u.ap;
4386 presp = rcu_dereference(ap->probe_resp);
4387 if (!presp)
4388 goto out;
4389
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004390 skb = dev_alloc_skb(presp->len);
Arik Nemtsov02945822011-11-10 11:28:57 +02004391 if (!skb)
4392 goto out;
4393
Johannes Berg59ae1d12017-06-16 14:29:20 +02004394 skb_put_data(skb, presp->data, presp->len);
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004395
Arik Nemtsov02945822011-11-10 11:28:57 +02004396 hdr = (struct ieee80211_hdr *) skb->data;
4397 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4398
4399out:
4400 rcu_read_unlock();
4401 return skb;
4402}
4403EXPORT_SYMBOL(ieee80211_proberesp_get);
4404
Kalle Valo7044cc52010-01-05 20:16:19 +02004405struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4406 struct ieee80211_vif *vif)
4407{
4408 struct ieee80211_sub_if_data *sdata;
4409 struct ieee80211_if_managed *ifmgd;
4410 struct ieee80211_pspoll *pspoll;
4411 struct ieee80211_local *local;
4412 struct sk_buff *skb;
4413
4414 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4415 return NULL;
4416
4417 sdata = vif_to_sdata(vif);
4418 ifmgd = &sdata->u.mgd;
4419 local = sdata->local;
4420
4421 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
Joe Perchesd15b8452011-08-29 14:17:31 -07004422 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02004423 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07004424
Kalle Valo7044cc52010-01-05 20:16:19 +02004425 skb_reserve(skb, local->hw.extra_tx_headroom);
4426
Johannes Bergb080db52017-06-16 14:29:19 +02004427 pspoll = skb_put_zero(skb, sizeof(*pspoll));
Kalle Valo7044cc52010-01-05 20:16:19 +02004428 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4429 IEEE80211_STYPE_PSPOLL);
4430 pspoll->aid = cpu_to_le16(ifmgd->aid);
4431
4432 /* aid in PS-Poll has its two MSBs each set to 1 */
4433 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4434
4435 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4436 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4437
4438 return skb;
4439}
4440EXPORT_SYMBOL(ieee80211_pspoll_get);
4441
4442struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004443 struct ieee80211_vif *vif,
4444 bool qos_ok)
Kalle Valo7044cc52010-01-05 20:16:19 +02004445{
4446 struct ieee80211_hdr_3addr *nullfunc;
4447 struct ieee80211_sub_if_data *sdata;
4448 struct ieee80211_if_managed *ifmgd;
4449 struct ieee80211_local *local;
4450 struct sk_buff *skb;
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004451 bool qos = false;
Kalle Valo7044cc52010-01-05 20:16:19 +02004452
4453 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4454 return NULL;
4455
4456 sdata = vif_to_sdata(vif);
4457 ifmgd = &sdata->u.mgd;
4458 local = sdata->local;
4459
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004460 if (qos_ok) {
4461 struct sta_info *sta;
4462
4463 rcu_read_lock();
4464 sta = sta_info_get(sdata, ifmgd->bssid);
4465 qos = sta && sta->sta.wme;
4466 rcu_read_unlock();
4467 }
4468
4469 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4470 sizeof(*nullfunc) + 2);
Joe Perchesd15b8452011-08-29 14:17:31 -07004471 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02004472 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07004473
Kalle Valo7044cc52010-01-05 20:16:19 +02004474 skb_reserve(skb, local->hw.extra_tx_headroom);
4475
Johannes Bergb080db52017-06-16 14:29:19 +02004476 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
Kalle Valo7044cc52010-01-05 20:16:19 +02004477 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4478 IEEE80211_STYPE_NULLFUNC |
4479 IEEE80211_FCTL_TODS);
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004480 if (qos) {
4481 __le16 qos = cpu_to_le16(7);
4482
4483 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4484 IEEE80211_STYPE_NULLFUNC) !=
4485 IEEE80211_STYPE_QOS_NULLFUNC);
4486 nullfunc->frame_control |=
4487 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4488 skb->priority = 7;
4489 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
4490 skb_put_data(skb, &qos, sizeof(qos));
4491 }
4492
Kalle Valo7044cc52010-01-05 20:16:19 +02004493 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4494 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4495 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4496
4497 return skb;
4498}
4499EXPORT_SYMBOL(ieee80211_nullfunc_get);
4500
Kalle Valo05e54ea2010-01-05 20:16:38 +02004501struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
Johannes Berga344d672014-06-12 22:24:31 +02004502 const u8 *src_addr,
Kalle Valo05e54ea2010-01-05 20:16:38 +02004503 const u8 *ssid, size_t ssid_len,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01004504 size_t tailroom)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004505{
Johannes Berga344d672014-06-12 22:24:31 +02004506 struct ieee80211_local *local = hw_to_local(hw);
Kalle Valo05e54ea2010-01-05 20:16:38 +02004507 struct ieee80211_hdr_3addr *hdr;
4508 struct sk_buff *skb;
4509 size_t ie_ssid_len;
4510 u8 *pos;
4511
Kalle Valo05e54ea2010-01-05 20:16:38 +02004512 ie_ssid_len = 2 + ssid_len;
4513
4514 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
Johannes Bergb9a9ada2012-11-29 13:00:10 +01004515 ie_ssid_len + tailroom);
Joe Perchesd15b8452011-08-29 14:17:31 -07004516 if (!skb)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004517 return NULL;
Kalle Valo05e54ea2010-01-05 20:16:38 +02004518
4519 skb_reserve(skb, local->hw.extra_tx_headroom);
4520
Johannes Bergb080db52017-06-16 14:29:19 +02004521 hdr = skb_put_zero(skb, sizeof(*hdr));
Kalle Valo05e54ea2010-01-05 20:16:38 +02004522 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4523 IEEE80211_STYPE_PROBE_REQ);
Johannes Berge83e6542012-07-13 16:23:07 +02004524 eth_broadcast_addr(hdr->addr1);
Johannes Berga344d672014-06-12 22:24:31 +02004525 memcpy(hdr->addr2, src_addr, ETH_ALEN);
Johannes Berge83e6542012-07-13 16:23:07 +02004526 eth_broadcast_addr(hdr->addr3);
Kalle Valo05e54ea2010-01-05 20:16:38 +02004527
4528 pos = skb_put(skb, ie_ssid_len);
4529 *pos++ = WLAN_EID_SSID;
4530 *pos++ = ssid_len;
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02004531 if (ssid_len)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004532 memcpy(pos, ssid, ssid_len);
4533 pos += ssid_len;
4534
Kalle Valo05e54ea2010-01-05 20:16:38 +02004535 return skb;
4536}
4537EXPORT_SYMBOL(ieee80211_probereq_get);
4538
Johannes Berg32bfd352007-12-19 01:31:26 +01004539void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02004540 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02004541 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02004542 struct ieee80211_rts *rts)
4543{
4544 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02004545
Harvey Harrison065e96052008-06-22 16:45:27 -07004546 rts->frame_control =
4547 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01004548 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4549 frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02004550 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4551 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4552}
4553EXPORT_SYMBOL(ieee80211_rts_get);
4554
Johannes Berg32bfd352007-12-19 01:31:26 +01004555void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02004556 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02004557 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02004558 struct ieee80211_cts *cts)
4559{
4560 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02004561
Harvey Harrison065e96052008-06-22 16:45:27 -07004562 cts->frame_control =
4563 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01004564 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4565 frame_len, frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02004566 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4567}
4568EXPORT_SYMBOL(ieee80211_ctstoself_get);
4569
4570struct sk_buff *
Johannes Berg32bfd352007-12-19 01:31:26 +01004571ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +02004572 struct ieee80211_vif *vif)
Johannes Berge2ebc742007-07-27 15:43:22 +02004573{
4574 struct ieee80211_local *local = hw_to_local(hw);
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004575 struct sk_buff *skb = NULL;
Johannes Berg5cf121c2008-02-25 16:27:43 +01004576 struct ieee80211_tx_data tx;
Johannes Berge2ebc742007-07-27 15:43:22 +02004577 struct ieee80211_sub_if_data *sdata;
Marco Porschd012a602012-10-10 12:39:50 -07004578 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +02004579 struct ieee80211_tx_info *info;
Johannes Berg55de9082012-07-26 17:24:39 +02004580 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02004581
Johannes Berg32bfd352007-12-19 01:31:26 +01004582 sdata = vif_to_sdata(vif);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004583
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004584 rcu_read_lock();
Johannes Berg55de9082012-07-26 17:24:39 +02004585 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004586
Marco Porschd012a602012-10-10 12:39:50 -07004587 if (!chanctx_conf)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004588 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004589
Marco Porschd012a602012-10-10 12:39:50 -07004590 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4591 struct beacon_data *beacon =
4592 rcu_dereference(sdata->u.ap.beacon);
4593
4594 if (!beacon || !beacon->head)
4595 goto out;
4596
4597 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +01004598 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4599 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -07004600 } else {
4601 goto out;
4602 }
4603
4604 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004605 goto out; /* send buffered bc/mc only after DTIM beacon */
Johannes Berge039fa42008-05-15 12:55:29 +02004606
Johannes Berge2ebc742007-07-27 15:43:22 +02004607 while (1) {
Marco Porschd012a602012-10-10 12:39:50 -07004608 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +02004609 if (!skb)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004610 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02004611 local->total_ps_buffered--;
4612
Marco Porschd012a602012-10-10 12:39:50 -07004613 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
Johannes Berge2ebc742007-07-27 15:43:22 +02004614 struct ieee80211_hdr *hdr =
4615 (struct ieee80211_hdr *) skb->data;
4616 /* more buffered multicast/broadcast frames ==> set
4617 * MoreData flag in IEEE 802.11 header to inform PS
4618 * STAs */
4619 hdr->frame_control |=
4620 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4621 }
4622
Michael Braun112c44b2014-03-06 15:08:43 +01004623 if (sdata->vif.type == NL80211_IFTYPE_AP)
Marco Porsch7cbf9d02013-03-01 16:01:18 +01004624 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
Johannes Berg7c107702015-03-20 14:18:27 +01004625 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
Johannes Berge2ebc742007-07-27 15:43:22 +02004626 break;
Felix Fietkau6b07d9c2016-08-02 11:13:41 +02004627 ieee80211_free_txskb(hw, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02004628 }
Johannes Berge039fa42008-05-15 12:55:29 +02004629
4630 info = IEEE80211_SKB_CB(skb);
4631
Johannes Berg5cf121c2008-02-25 16:27:43 +01004632 tx.flags |= IEEE80211_TX_PS_BUFFERED;
Johannes Berg4bf88532012-11-09 11:39:59 +01004633 info->band = chanctx_conf->def.chan->band;
Johannes Berge2ebc742007-07-27 15:43:22 +02004634
Johannes Berg97b045d2008-06-20 01:22:30 +02004635 if (invoke_tx_handlers(&tx))
Johannes Berge2ebc742007-07-27 15:43:22 +02004636 skb = NULL;
Johannes Berg97b045d2008-06-20 01:22:30 +02004637 out:
Johannes Bergd0709a62008-02-25 16:27:46 +01004638 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004639
4640 return skb;
4641}
4642EXPORT_SYMBOL(ieee80211_get_buffered_bc);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004643
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004644int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4645{
4646 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4647 struct ieee80211_sub_if_data *sdata = sta->sdata;
4648 struct ieee80211_local *local = sdata->local;
4649 int ret;
4650 u32 queues;
4651
4652 lockdep_assert_held(&local->sta_mtx);
4653
4654 /* only some cases are supported right now */
4655 switch (sdata->vif.type) {
4656 case NL80211_IFTYPE_STATION:
4657 case NL80211_IFTYPE_AP:
4658 case NL80211_IFTYPE_AP_VLAN:
4659 break;
4660 default:
4661 WARN_ON(1);
4662 return -EINVAL;
4663 }
4664
4665 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4666 return -EINVAL;
4667
4668 if (sta->reserved_tid == tid) {
4669 ret = 0;
4670 goto out;
4671 }
4672
4673 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4674 sdata_err(sdata, "TID reservation already active\n");
4675 ret = -EALREADY;
4676 goto out;
4677 }
4678
4679 ieee80211_stop_vif_queues(sdata->local, sdata,
4680 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4681
4682 synchronize_net();
4683
4684 /* Tear down BA sessions so we stop aggregating on this TID */
Johannes Berg30686bf2015-06-02 21:39:54 +02004685 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004686 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4687 __ieee80211_stop_tx_ba_session(sta, tid,
4688 AGG_STOP_LOCAL_REQUEST);
4689 }
4690
4691 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +02004692 __ieee80211_flush_queues(local, sdata, queues, false);
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004693
4694 sta->reserved_tid = tid;
4695
4696 ieee80211_wake_vif_queues(local, sdata,
4697 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4698
Johannes Berg30686bf2015-06-02 21:39:54 +02004699 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004700 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4701
4702 ret = 0;
4703 out:
4704 return ret;
4705}
4706EXPORT_SYMBOL(ieee80211_reserve_tid);
4707
4708void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4709{
4710 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4711 struct ieee80211_sub_if_data *sdata = sta->sdata;
4712
4713 lockdep_assert_held(&sdata->local->sta_mtx);
4714
4715 /* only some cases are supported right now */
4716 switch (sdata->vif.type) {
4717 case NL80211_IFTYPE_STATION:
4718 case NL80211_IFTYPE_AP:
4719 case NL80211_IFTYPE_AP_VLAN:
4720 break;
4721 default:
4722 WARN_ON(1);
4723 return;
4724 }
4725
4726 if (tid != sta->reserved_tid) {
4727 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4728 return;
4729 }
4730
4731 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4732}
4733EXPORT_SYMBOL(ieee80211_unreserve_tid);
4734
Johannes Berg55de9082012-07-26 17:24:39 +02004735void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4736 struct sk_buff *skb, int tid,
Johannes Berg57fbcce2016-04-12 15:56:15 +02004737 enum nl80211_band band)
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004738{
Amadeusz Sławiński731977e2017-01-24 16:42:10 +01004739 int ac = ieee80211_ac_from_tid(tid);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02004740
Zhang Shengjud57a5442016-03-03 01:16:56 +00004741 skb_reset_mac_header(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02004742 skb_set_queue_mapping(skb, ac);
Helmut Schaacf6bb792011-12-15 10:18:34 +01004743 skb->priority = tid;
Johannes Bergcf0277e2010-01-05 18:00:58 +01004744
Johannes Berg89afe612013-02-13 15:39:57 +01004745 skb->dev = sdata->dev;
4746
Johannes Berg3d34deb2009-06-18 17:25:11 +02004747 /*
4748 * The other path calling ieee80211_xmit is from the tasklet,
4749 * and while we can handle concurrent transmissions locking
4750 * requirements are that we do not come into tx with bhs on.
4751 */
4752 local_bh_disable();
Johannes Berg73c4e192014-11-09 18:50:09 +02004753 IEEE80211_SKB_CB(skb)->band = band;
Johannes Berg7c107702015-03-20 14:18:27 +01004754 ieee80211_xmit(sdata, NULL, skb);
Johannes Berg3d34deb2009-06-18 17:25:11 +02004755 local_bh_enable();
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004756}