blob: 502396694f4793ebf213ccc1a5b976c2496bfbeb [file] [log] [blame]
Johannes Berge2ebc742007-07-27 15:43:22 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
Johannes Bergd98ad832014-09-03 15:24:57 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Berge2ebc742007-07-27 15:43:22 +02007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 *
13 * Transmit and frame generation functions.
14 */
15
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/bitmap.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040021#include <linux/rcupdate.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040022#include <linux/export.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070023#include <net/net_namespace.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020024#include <net/ieee80211_radiotap.h>
25#include <net/cfg80211.h>
26#include <net/mac80211.h>
Michal Kazior5caa3282016-05-19 10:37:51 +020027#include <net/codel.h>
28#include <net/codel_impl.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020029#include <asm/unaligned.h>
Michal Kaziorfa962b92016-05-19 10:37:49 +020030#include <net/fq_impl.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020031
32#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020033#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040034#include "led.h"
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +010035#include "mesh.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020036#include "wep.h"
37#include "wpa.h"
38#include "wme.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040039#include "rate.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020040
Johannes Berge2ebc742007-07-27 15:43:22 +020041/* misc utils */
42
Johannes Berg5a490512015-04-22 17:10:38 +020043static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
44{
45 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
46
47 u64_stats_update_begin(&tstats->syncp);
48 tstats->tx_packets++;
49 tstats->tx_bytes += len;
50 u64_stats_update_end(&tstats->syncp);
51}
52
Johannes Berg252b86c2011-11-16 15:28:55 +010053static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
54 struct sk_buff *skb, int group_addr,
Johannes Berg03f93c32008-06-25 14:36:27 +030055 int next_frag_len)
Johannes Berge2ebc742007-07-27 15:43:22 +020056{
Simon Wunderlich2103dec2013-07-08 16:55:53 +020057 int rate, mrate, erp, dur, i, shift = 0;
Johannes Berg2e92e6f2008-05-15 12:55:27 +020058 struct ieee80211_rate *txrate;
Johannes Berge2ebc742007-07-27 15:43:22 +020059 struct ieee80211_local *local = tx->local;
Johannes Berg8318d782008-01-24 19:38:38 +010060 struct ieee80211_supported_band *sband;
Harvey Harrison358c8d92008-07-15 18:44:13 -070061 struct ieee80211_hdr *hdr;
Johannes Berg252b86c2011-11-16 15:28:55 +010062 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Simon Wunderlich2103dec2013-07-08 16:55:53 +020063 struct ieee80211_chanctx_conf *chanctx_conf;
64 u32 rate_flags = 0;
65
66 rcu_read_lock();
67 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
68 if (chanctx_conf) {
69 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
70 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
71 }
72 rcu_read_unlock();
Johannes Berge6a98542008-10-21 12:40:02 +020073
74 /* assume HW handles this */
Felix Fietkau336004e2014-11-21 23:29:14 +010075 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
Johannes Berge6a98542008-10-21 12:40:02 +020076 return 0;
77
78 /* uh huh? */
Felix Fietkau0d528d82013-04-22 16:14:41 +020079 if (WARN_ON_ONCE(tx->rate.idx < 0))
Johannes Berge6a98542008-10-21 12:40:02 +020080 return 0;
Johannes Berge2ebc742007-07-27 15:43:22 +020081
Johannes Berg2d565772012-07-23 15:12:51 +020082 sband = local->hw.wiphy->bands[info->band];
Felix Fietkau0d528d82013-04-22 16:14:41 +020083 txrate = &sband->bitrates[tx->rate.idx];
Johannes Berg8318d782008-01-24 19:38:38 +010084
Johannes Berge6a98542008-10-21 12:40:02 +020085 erp = txrate->flags & IEEE80211_RATE_ERP_G;
Johannes Berge2ebc742007-07-27 15:43:22 +020086
87 /*
88 * data and mgmt (except PS Poll):
89 * - during CFP: 32768
90 * - during contention period:
91 * if addr1 is group address: 0
92 * if more fragments = 0 and addr1 is individual address: time to
93 * transmit one ACK plus SIFS
94 * if more fragments = 1 and addr1 is individual address: time to
95 * transmit next fragment plus 2 x ACK plus 3 x SIFS
96 *
97 * IEEE 802.11, 9.6:
98 * - control response frame (CTS or ACK) shall be transmitted using the
99 * same rate as the immediately previous frame in the frame exchange
100 * sequence, if this rate belongs to the PHY mandatory rates, or else
101 * at the highest possible rate belonging to the PHY rates in the
102 * BSSBasicRateSet
103 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100104 hdr = (struct ieee80211_hdr *)skb->data;
Harvey Harrison358c8d92008-07-15 18:44:13 -0700105 if (ieee80211_is_ctl(hdr->frame_control)) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200106 /* TODO: These control frames are not currently sent by
Johannes Bergccd7b362008-09-11 00:01:56 +0200107 * mac80211, but should they be implemented, this function
Johannes Berge2ebc742007-07-27 15:43:22 +0200108 * needs to be updated to support duration field calculation.
109 *
110 * RTS: time needed to transmit pending data/mgmt frame plus
111 * one CTS frame plus one ACK frame plus 3 x SIFS
112 * CTS: duration of immediately previous RTS minus time
113 * required to transmit CTS and its SIFS
114 * ACK: 0 if immediately previous directed data/mgmt had
115 * more=0, with more=1 duration in ACK frame is duration
116 * from previous frame minus time needed to transmit ACK
117 * and its SIFS
118 * PS Poll: BIT(15) | BIT(14) | aid
119 */
120 return 0;
121 }
122
123 /* data/mgmt */
124 if (0 /* FIX: data/mgmt during CFP */)
Johannes Berg03f93c32008-06-25 14:36:27 +0300125 return cpu_to_le16(32768);
Johannes Berge2ebc742007-07-27 15:43:22 +0200126
127 if (group_addr) /* Group address as the destination - no ACK */
128 return 0;
129
130 /* Individual destination address:
131 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
132 * CTS and ACK frames shall be transmitted using the highest rate in
133 * basic rate set that is less than or equal to the rate of the
134 * immediately previous frame and that is using the same modulation
135 * (CCK or OFDM). If no basic rate set matches with these requirements,
136 * the highest mandatory rate of the PHY that is less than or equal to
137 * the rate of the previous frame is used.
138 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
139 */
140 rate = -1;
Johannes Berg8318d782008-01-24 19:38:38 +0100141 /* use lowest available if everything fails */
142 mrate = sband->bitrates[0].bitrate;
143 for (i = 0; i < sband->n_bitrates; i++) {
144 struct ieee80211_rate *r = &sband->bitrates[i];
145
146 if (r->bitrate > txrate->bitrate)
Johannes Berge2ebc742007-07-27 15:43:22 +0200147 break;
148
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200149 if ((rate_flags & r->flags) != rate_flags)
150 continue;
151
Johannes Bergbda39332008-10-11 01:51:51 +0200152 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200153 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200154
Johannes Berg8318d782008-01-24 19:38:38 +0100155 switch (sband->band) {
Johannes Berg57fbcce2016-04-12 15:56:15 +0200156 case NL80211_BAND_2GHZ: {
Johannes Berg8318d782008-01-24 19:38:38 +0100157 u32 flag;
158 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
159 flag = IEEE80211_RATE_MANDATORY_G;
160 else
161 flag = IEEE80211_RATE_MANDATORY_B;
162 if (r->flags & flag)
163 mrate = r->bitrate;
164 break;
165 }
Johannes Berg57fbcce2016-04-12 15:56:15 +0200166 case NL80211_BAND_5GHZ:
Johannes Berg8318d782008-01-24 19:38:38 +0100167 if (r->flags & IEEE80211_RATE_MANDATORY_A)
168 mrate = r->bitrate;
169 break;
Johannes Berg57fbcce2016-04-12 15:56:15 +0200170 case NL80211_BAND_60GHZ:
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300171 /* TODO, for now fall through */
Johannes Berg57fbcce2016-04-12 15:56:15 +0200172 case NUM_NL80211_BANDS:
Johannes Berg8318d782008-01-24 19:38:38 +0100173 WARN_ON(1);
174 break;
175 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200176 }
177 if (rate == -1) {
178 /* No matching basic rate found; use highest suitable mandatory
179 * PHY rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200180 rate = DIV_ROUND_UP(mrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200181 }
182
Simon Wunderlich6674f212011-11-21 21:34:30 +0100183 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
184 if (ieee80211_is_data_qos(hdr->frame_control) &&
Claudio Pisac26a0e12012-05-28 13:06:25 +0100185 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
Simon Wunderlich6674f212011-11-21 21:34:30 +0100186 dur = 0;
187 else
188 /* Time needed to transmit ACK
189 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
190 * to closest integer */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200191 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200192 tx->sdata->vif.bss_conf.use_short_preamble,
193 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200194
195 if (next_frag_len) {
196 /* Frame is fragmented: duration increases with time needed to
197 * transmit next fragment plus ACK and 2 x SIFS. */
198 dur *= 2; /* ACK + SIFS */
199 /* next fragment */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200200 dur += ieee80211_frame_duration(sband->band, next_frag_len,
Johannes Berg8318d782008-01-24 19:38:38 +0100201 txrate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200202 tx->sdata->vif.bss_conf.use_short_preamble,
203 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200204 }
205
Johannes Berg03f93c32008-06-25 14:36:27 +0300206 return cpu_to_le16(dur);
Johannes Berge2ebc742007-07-27 15:43:22 +0200207}
208
Johannes Berge2ebc742007-07-27 15:43:22 +0200209/* tx handlers */
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200210static ieee80211_tx_result debug_noinline
211ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
212{
213 struct ieee80211_local *local = tx->local;
Kalle Valo0c742112010-01-12 10:42:53 +0200214 struct ieee80211_if_managed *ifmgd;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200215
216 /* driver doesn't support power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200217 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200218 return TX_CONTINUE;
219
220 /* hardware does dynamic power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200221 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200222 return TX_CONTINUE;
223
224 /* dynamic power save disabled */
225 if (local->hw.conf.dynamic_ps_timeout <= 0)
226 return TX_CONTINUE;
227
228 /* we are scanning, don't enable power save */
229 if (local->scanning)
230 return TX_CONTINUE;
231
232 if (!local->ps_sdata)
233 return TX_CONTINUE;
234
235 /* No point if we're going to suspend */
236 if (local->quiescing)
237 return TX_CONTINUE;
238
Kalle Valo0c742112010-01-12 10:42:53 +0200239 /* dynamic ps is supported only in managed mode */
240 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
241 return TX_CONTINUE;
242
243 ifmgd = &tx->sdata->u.mgd;
244
245 /*
246 * Don't wakeup from power save if u-apsd is enabled, voip ac has
247 * u-apsd enabled and the frame is in voip class. This effectively
248 * means that even if all access categories have u-apsd enabled, in
249 * practise u-apsd is only used with the voip ac. This is a
250 * workaround for the case when received voip class packets do not
251 * have correct qos tag for some reason, due the network or the
252 * peer application.
253 *
Eliad Pellerdc41e4d2012-03-14 16:15:03 +0200254 * Note: ifmgd->uapsd_queues access is racy here. If the value is
Kalle Valo0c742112010-01-12 10:42:53 +0200255 * changed via debugfs, user needs to reassociate manually to have
256 * everything in sync.
257 */
Johannes Berg4875d30d2012-03-27 14:18:37 +0200258 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
259 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
260 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
Kalle Valo0c742112010-01-12 10:42:53 +0200261 return TX_CONTINUE;
262
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200263 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
264 ieee80211_stop_queues_by_reason(&local->hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100265 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300266 IEEE80211_QUEUE_STOP_REASON_PS,
267 false);
Vivek Natarajandb285692011-02-18 17:18:03 +0530268 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200269 ieee80211_queue_work(&local->hw,
270 &local->dynamic_ps_disable_work);
271 }
272
Luciano Coelho5db1c072011-05-03 21:40:08 +0300273 /* Don't restart the timer if we're not disassociated */
274 if (!ifmgd->associated)
275 return TX_CONTINUE;
276
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200277 mod_timer(&local->dynamic_ps_timer, jiffies +
278 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
279
280 return TX_CONTINUE;
281}
Johannes Berge2ebc742007-07-27 15:43:22 +0200282
Johannes Bergd9e8a702008-06-30 15:10:44 +0200283static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100284ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200285{
Harvey Harrison358c8d92008-07-15 18:44:13 -0700286
Johannes Berge039fa42008-05-15 12:55:29 +0200287 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Berge039fa42008-05-15 12:55:29 +0200288 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200289 bool assoc = false;
Johannes Berge2ebc742007-07-27 15:43:22 +0200290
Johannes Berge039fa42008-05-15 12:55:29 +0200291 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100292 return TX_CONTINUE;
Johannes Berg58d41852007-09-26 17:53:18 +0200293
Ben Greearb23b0252011-02-04 11:54:17 -0800294 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
295 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
Kalle Valoa9a6fff2009-03-18 14:06:44 +0200296 !ieee80211_is_probe_req(hdr->frame_control) &&
297 !ieee80211_is_nullfunc(hdr->frame_control))
298 /*
299 * When software scanning only nullfunc frames (to notify
300 * the sleep state to the AP) and probe requests (for the
301 * active scan) are allowed, all other frames should not be
302 * sent and we should not get here, but if we do
303 * nonetheless, drop them to avoid sending them
304 * off-channel. See the link below and
305 * ieee80211_start_scan() for more.
306 *
307 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
308 */
Johannes Berg9ae54c82008-01-31 19:48:20 +0100309 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200310
Rostislav Lisovy239281f2014-11-03 10:33:19 +0100311 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
312 return TX_CONTINUE;
313
Bill Jordan1be7fe82010-10-01 11:20:41 -0400314 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
315 return TX_CONTINUE;
316
Johannes Berg5cf121c2008-02-25 16:27:43 +0100317 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
Johannes Berg9ae54c82008-01-31 19:48:20 +0100318 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200319
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200320 if (tx->sta)
321 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge2ebc742007-07-27 15:43:22 +0200322
Johannes Berg5cf121c2008-02-25 16:27:43 +0100323 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200324 if (unlikely(!assoc &&
Harvey Harrison358c8d92008-07-15 18:44:13 -0700325 ieee80211_is_data(hdr->frame_control))) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200326#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200327 sdata_info(tx->sdata,
328 "dropped data frame to not associated station %pM\n",
329 hdr->addr1);
330#endif
Johannes Berge2ebc742007-07-27 15:43:22 +0200331 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
Johannes Berg9ae54c82008-01-31 19:48:20 +0100332 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200333 }
Johannes Berg29623892011-12-14 12:20:31 +0100334 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
335 ieee80211_is_data(hdr->frame_control) &&
Felix Fietkau030ef8f2012-04-23 19:49:02 +0200336 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
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 Berg7d54d0d2007-12-19 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 Berg7d54d0d2007-12-19 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 Berg7d54d0d2007-12-19 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 Berg7d54d0d2007-12-19 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 Berg7d54d0d2007-12-19 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 Berg7d54d0d2007-12-19 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];
Jouni Malinen37eb0b12010-01-06 13:09:08 +0200685 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
686 txrc.max_rate_idx = -1;
687 else
688 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
Felix Fietkau2ffbe6d2013-04-16 13:38:42 +0200689
690 if (tx->sdata->rc_has_mcs_mask[info->band])
691 txrc.rate_idx_mcs_mask =
692 tx->sdata->rc_rateidx_mcs_mask[info->band];
693
Felix Fietkau8f0729b2010-11-11 15:07:23 +0100694 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
Chun-Yeow Yeoh4bb62342011-11-24 17:15:20 -0800695 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
Bertold Van den Bergh5765f9f2015-08-05 16:02:28 +0200696 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
697 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
Johannes Berg58d41852007-09-26 17:53:18 +0200698
Johannes Berge6a98542008-10-21 12:40:02 +0200699 /* set up RTS protection if desired */
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200700 if (len > tx->local->hw.wiphy->rts_threshold) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200701 txrc.rts = true;
Johannes Berge2ebc742007-07-27 15:43:22 +0200702 }
Johannes Berge6a98542008-10-21 12:40:02 +0200703
Felix Fietkau0d528d82013-04-22 16:14:41 +0200704 info->control.use_rts = txrc.rts;
Felix Fietkau991fec02013-04-16 13:38:43 +0200705 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
706
Johannes Berge6a98542008-10-21 12:40:02 +0200707 /*
708 * Use short preamble if the BSS can handle it, but not for
709 * management frames unless we know the receiver can handle
710 * that -- the management frame might be to a station that
711 * just wants a probe response.
712 */
713 if (tx->sdata->vif.bss_conf.use_short_preamble &&
714 (ieee80211_is_data(hdr->frame_control) ||
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200715 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
Felix Fietkau0d528d82013-04-22 16:14:41 +0200716 txrc.short_preamble = true;
717
718 info->control.short_preamble = txrc.short_preamble;
Johannes Berge6a98542008-10-21 12:40:02 +0200719
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +0100720 /* don't ask rate control when rate already injected via radiotap */
721 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
722 return TX_CONTINUE;
723
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200724 if (tx->sta)
725 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge6a98542008-10-21 12:40:02 +0200726
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700727 /*
728 * Lets not bother rate control if we're associated and cannot
729 * talk to the sta. This should not happen.
730 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200731 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700732 !rate_usable_index_exists(sband, &tx->sta->sta),
733 "%s: Dropped data frame as no usable bitrate found while "
734 "scanning and associated. Target station: "
735 "%pM on %d GHz band\n",
Johannes Berg47846c92009-11-25 17:46:19 +0100736 tx->sdata->name, hdr->addr1,
Johannes Berg2d565772012-07-23 15:12:51 +0200737 info->band ? 5 : 2))
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700738 return TX_DROP;
739
740 /*
741 * If we're associated with the sta at this point we know we can at
742 * least send the frame at the lowest bit rate.
743 */
Johannes Berge6a98542008-10-21 12:40:02 +0200744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
745
Felix Fietkau0d528d82013-04-22 16:14:41 +0200746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
748
749 if (unlikely(info->control.rates[0].idx < 0)) {
750 if (ratetbl) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
755 };
756
757 if (ratetbl->rate[0].idx < 0)
758 return TX_DROP;
759
760 tx->rate = rate;
761 } else {
762 return TX_DROP;
763 }
764 } else {
765 tx->rate = info->control.rates[0];
766 }
Johannes Berge6a98542008-10-21 12:40:02 +0200767
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100768 if (txrc.reported_rate.idx < 0) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200769 txrc.reported_rate = tx->rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100770 if (tx->sta && ieee80211_is_data(hdr->frame_control))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200771 tx->sta->tx_stats.last_rate = txrc.reported_rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100772 } else if (tx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200773 tx->sta->tx_stats.last_rate = txrc.reported_rate;
Johannes Berge6a98542008-10-21 12:40:02 +0200774
Felix Fietkau0d528d82013-04-22 16:14:41 +0200775 if (ratetbl)
776 return TX_CONTINUE;
777
Johannes Berge6a98542008-10-21 12:40:02 +0200778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
780
Gábor Stefanik99551512009-04-23 19:36:14 +0200781 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
782 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
783 info->control.rates[0].count = 1;
784
Johannes Berg9ae54c82008-01-31 19:48:20 +0100785 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200786}
787
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100788static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
789{
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
792
793 /* Increase the sequence number. */
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
795
796 return ret;
797}
798
Johannes Bergd9e8a702008-06-30 15:10:44 +0200799static ieee80211_tx_result debug_noinline
Johannes Bergf591fa52008-07-10 11:21:26 +0200800ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
801{
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergf591fa52008-07-10 11:21:26 +0200804 u8 *qc;
805 int tid;
806
Johannes Berg25d834e2008-09-12 22:52:47 +0200807 /*
808 * Packet injection may want to control the sequence
809 * number, if we have no matching interface then we
810 * neither assign one ourselves nor ask the driver to.
811 */
Johannes Berg5061b0c2009-07-14 00:33:34 +0200812 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
Johannes Berg25d834e2008-09-12 22:52:47 +0200813 return TX_CONTINUE;
814
Johannes Bergf591fa52008-07-10 11:21:26 +0200815 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
816 return TX_CONTINUE;
817
818 if (ieee80211_hdrlen(hdr->frame_control) < 24)
819 return TX_CONTINUE;
820
Johannes Berg49a59542011-09-29 16:04:41 +0200821 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
822 return TX_CONTINUE;
823
Johannes Berg94778282008-10-10 13:21:59 +0200824 /*
825 * Anything but QoS data that has a sequence number field
826 * (is long enough) gets a sequence number from the global
Bob Copelandc4c205f2013-08-23 09:35:38 -0400827 * counter. QoS data frames with a multicast destination
828 * also use the global counter (802.11-2012 9.3.2.10).
Johannes Berg94778282008-10-10 13:21:59 +0200829 */
Bob Copelandc4c205f2013-08-23 09:35:38 -0400830 if (!ieee80211_is_data_qos(hdr->frame_control) ||
831 is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg94778282008-10-10 13:21:59 +0200832 /* driver should assign sequence number */
Johannes Bergf591fa52008-07-10 11:21:26 +0200833 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
Johannes Berg94778282008-10-10 13:21:59 +0200834 /* for pure STA mode without beacons, we can do it */
835 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
836 tx->sdata->sequence_number += 0x10;
Johannes Berg79c892b2014-11-21 14:26:31 +0100837 if (tx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200838 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200839 return TX_CONTINUE;
840 }
841
842 /*
843 * This should be true for injected/management frames only, for
844 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
845 * above since they are not QoS-data frames.
846 */
847 if (!tx->sta)
848 return TX_CONTINUE;
849
850 /* include per-STA, per-TID sequence counter */
851
852 qc = ieee80211_get_qos_ctl(hdr);
853 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200854 tx->sta->tx_stats.msdu[tid]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200855
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100856 if (!tx->sta->sta.txq[0])
857 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
Johannes Bergf591fa52008-07-10 11:21:26 +0200858
859 return TX_CONTINUE;
860}
861
Johannes Berg252b86c2011-11-16 15:28:55 +0100862static int ieee80211_fragment(struct ieee80211_tx_data *tx,
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100863 struct sk_buff *skb, int hdrlen,
864 int frag_threshold)
865{
Johannes Berg252b86c2011-11-16 15:28:55 +0100866 struct ieee80211_local *local = tx->local;
Johannes Berga1a3fce2011-11-16 15:28:56 +0100867 struct ieee80211_tx_info *info;
Johannes Berg252b86c2011-11-16 15:28:55 +0100868 struct sk_buff *tmp;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100869 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
870 int pos = hdrlen + per_fragm;
871 int rem = skb->len - hdrlen - per_fragm;
872
873 if (WARN_ON(rem < 0))
874 return -EINVAL;
875
Johannes Berg252b86c2011-11-16 15:28:55 +0100876 /* first fragment was already added to queue by caller */
877
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100878 while (rem) {
879 int fraglen = per_fragm;
880
881 if (fraglen > rem)
882 fraglen = rem;
883 rem -= fraglen;
884 tmp = dev_alloc_skb(local->tx_headroom +
885 frag_threshold +
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200886 tx->sdata->encrypt_headroom +
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100887 IEEE80211_ENCRYPT_TAILROOM);
888 if (!tmp)
889 return -ENOMEM;
Johannes Berg252b86c2011-11-16 15:28:55 +0100890
891 __skb_queue_tail(&tx->skbs, tmp);
892
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200893 skb_reserve(tmp,
894 local->tx_headroom + tx->sdata->encrypt_headroom);
895
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100896 /* copy control information */
897 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
Johannes Berga1a3fce2011-11-16 15:28:56 +0100898
899 info = IEEE80211_SKB_CB(tmp);
900 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
901 IEEE80211_TX_CTL_FIRST_FRAGMENT);
902
903 if (rem)
904 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
905
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100906 skb_copy_queue_mapping(tmp, skb);
907 tmp->priority = skb->priority;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100908 tmp->dev = skb->dev;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100909
910 /* copy header and data */
911 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
912 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
913
914 pos += fraglen;
915 }
916
Johannes Berg252b86c2011-11-16 15:28:55 +0100917 /* adjust first fragment's length */
Johannes Berg338f9772014-02-01 00:16:23 +0100918 skb_trim(skb, hdrlen + per_fragm);
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100919 return 0;
920}
921
Johannes Bergf591fa52008-07-10 11:21:26 +0200922static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +0200923ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
924{
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100925 struct sk_buff *skb = tx->skb;
926 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
927 struct ieee80211_hdr *hdr = (void *)skb->data;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200928 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100929 int hdrlen;
930 int fragnum;
Johannes Berge2454942008-05-15 12:55:28 +0200931
Johannes Berg252b86c2011-11-16 15:28:55 +0100932 /* no matter what happens, tx->skb moves to tx->skbs */
933 __skb_queue_tail(&tx->skbs, skb);
934 tx->skb = NULL;
935
Johannes Berga26eb272011-10-07 14:01:25 +0200936 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
937 return TX_CONTINUE;
938
939 if (tx->local->ops->set_frag_threshold)
Johannes Berge2454942008-05-15 12:55:28 +0200940 return TX_CONTINUE;
941
Johannes Bergeefce912008-05-17 00:57:13 +0200942 /*
943 * Warn when submitting a fragmented A-MPDU frame and drop it.
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200944 * This scenario is handled in ieee80211_tx_prepare but extra
Ron Rindjunsky8d5e0d52008-06-12 15:42:29 +0300945 * caution taken here as fragmented ampdu may cause Tx stop.
Johannes Bergeefce912008-05-17 00:57:13 +0200946 */
Sujith8b30b1f2008-10-24 09:55:27 +0530947 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
Johannes Bergeefce912008-05-17 00:57:13 +0200948 return TX_DROP;
949
Harvey Harrison065e96052008-06-22 16:45:27 -0700950 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berge2454942008-05-15 12:55:28 +0200951
Johannes Berga26eb272011-10-07 14:01:25 +0200952 /* internal error, why isn't DONTFRAG set? */
Johannes Berg8ccd8f22009-04-29 23:35:56 +0200953 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100954 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200955
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100956 /*
957 * Now fragment the frame. This will allocate all the fragments and
958 * chain them (using skb as the first fragment) to skb->next.
959 * During transmission, we will remove the successfully transmitted
960 * fragments from this list. When the low-level driver rejects one
961 * of the fragments then we will simply pretend to accept the skb
962 * but store it away as pending.
963 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100964 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100965 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200966
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100967 /* update duration/seq/flags of fragments */
968 fragnum = 0;
Johannes Berg252b86c2011-11-16 15:28:55 +0100969
970 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100971 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
Johannes Berge2454942008-05-15 12:55:28 +0200972
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100973 hdr = (void *)skb->data;
974 info = IEEE80211_SKB_CB(skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200975
Johannes Berg252b86c2011-11-16 15:28:55 +0100976 if (!skb_queue_is_last(&tx->skbs, skb)) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100977 hdr->frame_control |= morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200978 /*
979 * No multi-rate retries for fragmented frames, that
980 * would completely throw off the NAV at other STAs.
981 */
982 info->control.rates[1].idx = -1;
983 info->control.rates[2].idx = -1;
984 info->control.rates[3].idx = -1;
Thomas Huehne3e1a0b2012-07-02 19:46:16 +0200985 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
Johannes Berge6a98542008-10-21 12:40:02 +0200986 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100987 } else {
988 hdr->frame_control &= ~morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200989 }
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100990 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
991 fragnum++;
Johannes Berg252b86c2011-11-16 15:28:55 +0100992 }
Johannes Berge2454942008-05-15 12:55:28 +0200993
994 return TX_CONTINUE;
Johannes Berge2454942008-05-15 12:55:28 +0200995}
996
Johannes Bergd9e8a702008-06-30 15:10:44 +0200997static ieee80211_tx_result debug_noinline
Johannes Bergfeff1f22009-08-10 16:01:54 +0200998ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
999{
Johannes Berg252b86c2011-11-16 15:28:55 +01001000 struct sk_buff *skb;
Johannes Berg560d2682013-02-05 10:55:21 +01001001 int ac = -1;
Johannes Bergfeff1f22009-08-10 16:01:54 +02001002
1003 if (!tx->sta)
1004 return TX_CONTINUE;
1005
Johannes Berg252b86c2011-11-16 15:28:55 +01001006 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg560d2682013-02-05 10:55:21 +01001007 ac = skb_get_queue_mapping(skb);
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001008 tx->sta->tx_stats.bytes[ac] += skb->len;
Johannes Berg252b86c2011-11-16 15:28:55 +01001009 }
Johannes Berg560d2682013-02-05 10:55:21 +01001010 if (ac >= 0)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001011 tx->sta->tx_stats.packets[ac]++;
Johannes Bergfeff1f22009-08-10 16:01:54 +02001012
1013 return TX_CONTINUE;
1014}
1015
1016static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +02001017ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1018{
1019 if (!tx->key)
1020 return TX_CONTINUE;
1021
Johannes Berg97359d12010-08-10 09:46:38 +02001022 switch (tx->key->conf.cipher) {
1023 case WLAN_CIPHER_SUITE_WEP40:
1024 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berge2454942008-05-15 12:55:28 +02001025 return ieee80211_crypto_wep_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001026 case WLAN_CIPHER_SUITE_TKIP:
Johannes Berge2454942008-05-15 12:55:28 +02001027 return ieee80211_crypto_tkip_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001028 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02001029 return ieee80211_crypto_ccmp_encrypt(
1030 tx, IEEE80211_CCMP_MIC_LEN);
1031 case WLAN_CIPHER_SUITE_CCMP_256:
1032 return ieee80211_crypto_ccmp_encrypt(
1033 tx, IEEE80211_CCMP_256_MIC_LEN);
Johannes Berg97359d12010-08-10 09:46:38 +02001034 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02001035 return ieee80211_crypto_aes_cmac_encrypt(tx);
Jouni Malinen56c52da2015-01-24 19:52:08 +02001036 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1037 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
Jouni Malinen8ade5382015-01-24 19:52:09 +02001038 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1039 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1040 return ieee80211_crypto_aes_gmac_encrypt(tx);
Jouni Malinen00b9cfa2015-01-24 19:52:06 +02001041 case WLAN_CIPHER_SUITE_GCMP:
1042 case WLAN_CIPHER_SUITE_GCMP_256:
1043 return ieee80211_crypto_gcmp_encrypt(tx);
Johannes Berg3ffc2a92010-08-27 14:26:52 +03001044 default:
Yoni Divinskyd32a1022012-01-16 15:18:59 +02001045 return ieee80211_crypto_hw_encrypt(tx);
Johannes Berge2454942008-05-15 12:55:28 +02001046 }
1047
Johannes Berge2454942008-05-15 12:55:28 +02001048 return TX_DROP;
1049}
1050
Johannes Bergd9e8a702008-06-30 15:10:44 +02001051static ieee80211_tx_result debug_noinline
Johannes Berg03f93c32008-06-25 14:36:27 +03001052ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1053{
Johannes Berg252b86c2011-11-16 15:28:55 +01001054 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001055 struct ieee80211_hdr *hdr;
1056 int next_len;
1057 bool group_addr;
Johannes Berg03f93c32008-06-25 14:36:27 +03001058
Johannes Berg252b86c2011-11-16 15:28:55 +01001059 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001060 hdr = (void *) skb->data;
Jouni Malinen7e0aae42009-05-19 19:25:58 +03001061 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1062 break; /* must not overwrite AID */
Johannes Berg252b86c2011-11-16 15:28:55 +01001063 if (!skb_queue_is_last(&tx->skbs, skb)) {
1064 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1065 next_len = next->len;
1066 } else
1067 next_len = 0;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001068 group_addr = is_multicast_ether_addr(hdr->addr1);
Johannes Berg03f93c32008-06-25 14:36:27 +03001069
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001070 hdr->duration_id =
Johannes Berg252b86c2011-11-16 15:28:55 +01001071 ieee80211_duration(tx, skb, group_addr, next_len);
1072 }
Johannes Berg03f93c32008-06-25 14:36:27 +03001073
1074 return TX_CONTINUE;
1075}
1076
Johannes Berge2ebc742007-07-27 15:43:22 +02001077/* actual transmit path */
1078
Johannes Berga622ab72010-06-10 10:21:39 +02001079static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1080 struct sk_buff *skb,
1081 struct ieee80211_tx_info *info,
1082 struct tid_ampdu_tx *tid_tx,
1083 int tid)
1084{
1085 bool queued = false;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001086 bool reset_agg_timer = false;
Helmut Schaaaa454582012-03-07 17:20:30 +01001087 struct sk_buff *purge_skb = NULL;
Johannes Berga622ab72010-06-10 10:21:39 +02001088
1089 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1090 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001091 reset_agg_timer = true;
Johannes Berg0ab33702010-06-10 10:21:42 +02001092 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1093 /*
1094 * nothing -- this aggregation session is being started
1095 * but that might still fail with the driver
1096 */
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001097 } else if (!tx->sta->sta.txq[tid]) {
Johannes Berga622ab72010-06-10 10:21:39 +02001098 spin_lock(&tx->sta->lock);
1099 /*
1100 * Need to re-check now, because we may get here
1101 *
1102 * 1) in the window during which the setup is actually
1103 * already done, but not marked yet because not all
1104 * packets are spliced over to the driver pending
1105 * queue yet -- if this happened we acquire the lock
1106 * either before or after the splice happens, but
1107 * need to recheck which of these cases happened.
1108 *
1109 * 2) during session teardown, if the OPERATIONAL bit
1110 * was cleared due to the teardown but the pointer
1111 * hasn't been assigned NULL yet (or we loaded it
1112 * before it was assigned) -- in this case it may
1113 * now be NULL which means we should just let the
1114 * packet pass through because splicing the frames
1115 * back is already done.
1116 */
Johannes Berg40b275b2011-05-13 14:15:49 +02001117 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
Johannes Berga622ab72010-06-10 10:21:39 +02001118
1119 if (!tid_tx) {
1120 /* do nothing, let packet pass through */
1121 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1122 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001123 reset_agg_timer = true;
Johannes Berga622ab72010-06-10 10:21:39 +02001124 } else {
1125 queued = true;
Emmanuel Grumbachf6d46712016-03-17 16:51:42 +02001126 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1127 clear_sta_flag(tx->sta, WLAN_STA_SP);
1128 ps_dbg(tx->sta->sdata,
1129 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1130 tx->sta->sta.addr, tx->sta->sta.aid);
1131 }
Johannes Berga622ab72010-06-10 10:21:39 +02001132 info->control.vif = &tx->sdata->vif;
1133 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Emmanuel Grumbachfacde7f2016-03-17 16:51:41 +02001134 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berga622ab72010-06-10 10:21:39 +02001135 __skb_queue_tail(&tid_tx->pending, skb);
Helmut Schaaaa454582012-03-07 17:20:30 +01001136 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1137 purge_skb = __skb_dequeue(&tid_tx->pending);
Johannes Berga622ab72010-06-10 10:21:39 +02001138 }
1139 spin_unlock(&tx->sta->lock);
Helmut Schaaaa454582012-03-07 17:20:30 +01001140
1141 if (purge_skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001142 ieee80211_free_txskb(&tx->local->hw, purge_skb);
Johannes Berga622ab72010-06-10 10:21:39 +02001143 }
1144
Nikolay Martynov285fa692011-11-22 21:50:28 -05001145 /* reset session timer */
1146 if (reset_agg_timer && tid_tx->timeout)
Felix Fietkau12d3952f2012-03-18 22:58:06 +01001147 tid_tx->last_tx = jiffies;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001148
Johannes Berga622ab72010-06-10 10:21:39 +02001149 return queued;
1150}
1151
Johannes Berg58d41852007-09-26 17:53:18 +02001152/*
1153 * initialises @tx
Johannes Berg7c107702015-03-20 14:18:27 +01001154 * pass %NULL for the station if unknown, a valid pointer if known
1155 * or an ERR_PTR() if the station is known not to exist
Johannes Berg58d41852007-09-26 17:53:18 +02001156 */
Johannes Berg9ae54c82008-01-31 19:48:20 +01001157static ieee80211_tx_result
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001158ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1159 struct ieee80211_tx_data *tx,
Johannes Berg7c107702015-03-20 14:18:27 +01001160 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001161{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001162 struct ieee80211_local *local = sdata->local;
Johannes Berg58d41852007-09-26 17:53:18 +02001163 struct ieee80211_hdr *hdr;
Johannes Berge039fa42008-05-15 12:55:29 +02001164 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg68f2b512011-10-07 14:01:24 +02001165 int tid;
Johannes Berga622ab72010-06-10 10:21:39 +02001166 u8 *qc;
Johannes Berge2ebc742007-07-27 15:43:22 +02001167
1168 memset(tx, 0, sizeof(*tx));
1169 tx->skb = skb;
Johannes Berge2ebc742007-07-27 15:43:22 +02001170 tx->local = local;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001171 tx->sdata = sdata;
Johannes Berg252b86c2011-11-16 15:28:55 +01001172 __skb_queue_head_init(&tx->skbs);
Johannes Berge2ebc742007-07-27 15:43:22 +02001173
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001174 /*
1175 * If this flag is set to true anywhere, and we get here,
1176 * we are doing the needed processing, so remove the flag
1177 * now.
1178 */
1179 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1180
Johannes Berg58d41852007-09-26 17:53:18 +02001181 hdr = (struct ieee80211_hdr *) skb->data;
1182
Johannes Berg7c107702015-03-20 14:18:27 +01001183 if (likely(sta)) {
1184 if (!IS_ERR(sta))
1185 tx->sta = sta;
1186 } else {
1187 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1188 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1189 if (!tx->sta && sdata->wdev.use_4addr)
1190 return TX_DROP;
1191 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1192 IEEE80211_TX_CTL_INJECTED) ||
1193 tx->sdata->control_port_protocol == tx->skb->protocol) {
1194 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1195 }
1196 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1197 tx->sta = sta_info_get(sdata, hdr->addr1);
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001198 }
Johannes Berg58d41852007-09-26 17:53:18 +02001199
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001200 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
Johannes Berg49a59542011-09-29 16:04:41 +02001201 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001202 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1203 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001204 struct tid_ampdu_tx *tid_tx;
1205
Sujith8b30b1f2008-10-24 09:55:27 +05301206 qc = ieee80211_get_qos_ctl(hdr);
1207 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1208
Johannes Berga622ab72010-06-10 10:21:39 +02001209 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1210 if (tid_tx) {
1211 bool queued;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001212
Johannes Berga622ab72010-06-10 10:21:39 +02001213 queued = ieee80211_tx_prep_agg(tx, skb, info,
1214 tid_tx, tid);
1215
1216 if (unlikely(queued))
1217 return TX_QUEUED;
1218 }
Sujith8b30b1f2008-10-24 09:55:27 +05301219 }
1220
Jiri Slabybadffb72007-08-28 17:01:54 -04001221 if (is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg5cf121c2008-02-25 16:27:43 +01001222 tx->flags &= ~IEEE80211_TX_UNICAST;
Johannes Berge039fa42008-05-15 12:55:29 +02001223 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Simon Wunderlich6fd67e92011-11-18 14:20:42 +01001224 } else
Johannes Berg5cf121c2008-02-25 16:27:43 +01001225 tx->flags |= IEEE80211_TX_UNICAST;
Johannes Berg58d41852007-09-26 17:53:18 +02001226
Johannes Berga26eb272011-10-07 14:01:25 +02001227 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1228 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1229 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1230 info->flags & IEEE80211_TX_CTL_AMPDU)
1231 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
Johannes Berg58d41852007-09-26 17:53:18 +02001232 }
1233
Johannes Berge2ebc742007-07-27 15:43:22 +02001234 if (!tx->sta)
Johannes Berge039fa42008-05-15 12:55:29 +02001235 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Felix Fietkauf7418bc2015-09-24 14:59:49 +02001236 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
Johannes Berge039fa42008-05-15 12:55:29 +02001237 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Felix Fietkauf7418bc2015-09-24 14:59:49 +02001238 ieee80211_check_fast_xmit(tx->sta);
1239 }
Johannes Berg58d41852007-09-26 17:53:18 +02001240
Johannes Berge039fa42008-05-15 12:55:29 +02001241 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge2ebc742007-07-27 15:43:22 +02001242
Johannes Berg9ae54c82008-01-31 19:48:20 +01001243 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +02001244}
1245
Michal Kazior80a83cf2016-05-19 10:37:48 +02001246static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1247 struct ieee80211_vif *vif,
1248 struct ieee80211_sta *pubsta,
1249 struct sk_buff *skb)
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001250{
1251 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001252 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001253 struct ieee80211_txq *txq = NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001254
Felix Fietkauc3732a72016-02-28 15:19:53 +01001255 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1256 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
Michal Kazior80a83cf2016-05-19 10:37:48 +02001257 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001258
1259 if (!ieee80211_is_data(hdr->frame_control))
Michal Kazior80a83cf2016-05-19 10:37:48 +02001260 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001261
1262 if (pubsta) {
1263 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1264
1265 txq = pubsta->txq[tid];
1266 } else if (vif) {
1267 txq = vif->txq;
1268 }
1269
1270 if (!txq)
Michal Kazior80a83cf2016-05-19 10:37:48 +02001271 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001272
Michal Kazior80a83cf2016-05-19 10:37:48 +02001273 return to_txq_info(txq);
1274}
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001275
Michal Kazior5caa3282016-05-19 10:37:51 +02001276static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1277{
1278 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1279}
1280
1281static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1282{
1283 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
1284}
1285
1286static u32 codel_skb_len_func(const struct sk_buff *skb)
1287{
1288 return skb->len;
1289}
1290
1291static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1292{
1293 const struct ieee80211_tx_info *info;
1294
1295 info = (const struct ieee80211_tx_info *)skb->cb;
1296 return info->control.enqueue_time;
1297}
1298
1299static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1300 void *ctx)
1301{
1302 struct ieee80211_local *local;
1303 struct txq_info *txqi;
1304 struct fq *fq;
1305 struct fq_flow *flow;
1306
1307 txqi = ctx;
1308 local = vif_to_sdata(txqi->txq.vif)->local;
1309 fq = &local->fq;
1310
1311 if (cvars == &txqi->def_cvars)
1312 flow = &txqi->def_flow;
1313 else
1314 flow = &fq->flows[cvars - local->cvars];
1315
1316 return fq_flow_dequeue(fq, flow);
1317}
1318
1319static void codel_drop_func(struct sk_buff *skb,
1320 void *ctx)
1321{
1322 struct ieee80211_local *local;
1323 struct ieee80211_hw *hw;
1324 struct txq_info *txqi;
1325
1326 txqi = ctx;
1327 local = vif_to_sdata(txqi->txq.vif)->local;
1328 hw = &local->hw;
1329
1330 ieee80211_free_txskb(hw, skb);
1331}
1332
Michal Kaziorfa962b92016-05-19 10:37:49 +02001333static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1334 struct fq_tin *tin,
1335 struct fq_flow *flow)
1336{
Michal Kazior5caa3282016-05-19 10:37:51 +02001337 struct ieee80211_local *local;
1338 struct txq_info *txqi;
1339 struct codel_vars *cvars;
1340 struct codel_params *cparams;
1341 struct codel_stats *cstats;
1342
1343 local = container_of(fq, struct ieee80211_local, fq);
1344 txqi = container_of(tin, struct txq_info, tin);
1345 cparams = &local->cparams;
1346 cstats = &local->cstats;
1347
1348 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
Michal Kaziorfa962b92016-05-19 10:37:49 +02001399void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1400 struct sta_info *sta,
1401 struct txq_info *txqi, int tid)
1402{
1403 fq_tin_init(&txqi->tin);
1404 fq_flow_init(&txqi->def_flow);
Michal Kazior5caa3282016-05-19 10:37:51 +02001405 codel_vars_init(&txqi->def_cvars);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001406
1407 txqi->txq.vif = &sdata->vif;
1408
1409 if (sta) {
1410 txqi->txq.sta = &sta->sta;
1411 sta->sta.txq[tid] = &txqi->txq;
1412 txqi->txq.tid = tid;
1413 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
1414 } else {
1415 sdata->vif.txq = &txqi->txq;
1416 txqi->txq.tid = 0;
1417 txqi->txq.ac = IEEE80211_AC_BE;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001418 }
Michal Kaziorfa962b92016-05-19 10:37:49 +02001419}
Michal Kazior80a83cf2016-05-19 10:37:48 +02001420
Michal Kaziorfa962b92016-05-19 10:37:49 +02001421void ieee80211_txq_purge(struct ieee80211_local *local,
1422 struct txq_info *txqi)
1423{
1424 struct fq *fq = &local->fq;
1425 struct fq_tin *tin = &txqi->tin;
1426
1427 fq_tin_reset(fq, tin, fq_skb_free_func);
1428}
1429
1430int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1431{
1432 struct fq *fq = &local->fq;
1433 int ret;
Michal Kazior5caa3282016-05-19 10:37:51 +02001434 int i;
Michal Kaziorfa962b92016-05-19 10:37:49 +02001435
1436 if (!local->ops->wake_tx_queue)
1437 return 0;
1438
1439 ret = fq_init(fq, 4096);
1440 if (ret)
1441 return ret;
1442
Michal Kazior5caa3282016-05-19 10:37:51 +02001443 codel_params_init(&local->cparams);
1444 codel_stats_init(&local->cstats);
1445 local->cparams.interval = MS2TIME(100);
1446 local->cparams.target = MS2TIME(20);
1447 local->cparams.ecn = true;
1448
1449 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1450 GFP_KERNEL);
1451 if (!local->cvars) {
Michal Kazior59a7c822016-06-29 14:00:34 +02001452 spin_lock_bh(&fq->lock);
Michal Kazior5caa3282016-05-19 10:37:51 +02001453 fq_reset(fq, fq_skb_free_func);
Michal Kazior59a7c822016-06-29 14:00:34 +02001454 spin_unlock_bh(&fq->lock);
Michal Kazior5caa3282016-05-19 10:37:51 +02001455 return -ENOMEM;
1456 }
1457
1458 for (i = 0; i < fq->flows_cnt; i++)
1459 codel_vars_init(&local->cvars[i]);
1460
Michal Kaziorfa962b92016-05-19 10:37:49 +02001461 return 0;
1462}
1463
1464void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1465{
1466 struct fq *fq = &local->fq;
1467
1468 if (!local->ops->wake_tx_queue)
1469 return;
1470
Michal Kazior5caa3282016-05-19 10:37:51 +02001471 kfree(local->cvars);
1472 local->cvars = NULL;
1473
Michal Kazior59a7c822016-06-29 14:00:34 +02001474 spin_lock_bh(&fq->lock);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001475 fq_reset(fq, fq_skb_free_func);
Michal Kazior59a7c822016-06-29 14:00:34 +02001476 spin_unlock_bh(&fq->lock);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001477}
1478
1479struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
1480 struct ieee80211_txq *txq)
1481{
1482 struct ieee80211_local *local = hw_to_local(hw);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001483 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
1484 struct ieee80211_hdr *hdr;
1485 struct sk_buff *skb = NULL;
Michal Kaziorfa962b92016-05-19 10:37:49 +02001486 struct fq *fq = &local->fq;
1487 struct fq_tin *tin = &txqi->tin;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001488
Michal Kaziorfa962b92016-05-19 10:37:49 +02001489 spin_lock_bh(&fq->lock);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001490
1491 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
1492 goto out;
1493
Michal Kaziorfa962b92016-05-19 10:37:49 +02001494 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001495 if (!skb)
1496 goto out;
1497
Michal Kazior5caa3282016-05-19 10:37:51 +02001498 ieee80211_set_skb_vif(skb, txqi);
1499
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001500 hdr = (struct ieee80211_hdr *)skb->data;
1501 if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) {
1502 struct sta_info *sta = container_of(txq->sta, struct sta_info,
1503 sta);
1504 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1505
1506 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, txq->tid);
1507 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
1508 info->flags |= IEEE80211_TX_CTL_AMPDU;
1509 else
1510 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1511 }
1512
1513out:
Michal Kaziorfa962b92016-05-19 10:37:49 +02001514 spin_unlock_bh(&fq->lock);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001515
Felix Fietkau6e0456b2016-03-03 22:59:00 +01001516 if (skb && skb_has_frag_list(skb) &&
1517 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST))
1518 skb_linearize(skb);
1519
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001520 return skb;
1521}
1522EXPORT_SYMBOL(ieee80211_tx_dequeue);
1523
Johannes Berg11127e92011-11-16 16:02:47 +01001524static bool ieee80211_tx_frags(struct ieee80211_local *local,
1525 struct ieee80211_vif *vif,
1526 struct ieee80211_sta *sta,
1527 struct sk_buff_head *skbs,
1528 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001529{
Michal Kazior80a83cf2016-05-19 10:37:48 +02001530 struct ieee80211_tx_control control = {};
Michal Kaziorfa962b92016-05-19 10:37:49 +02001531 struct fq *fq = &local->fq;
Johannes Berg252b86c2011-11-16 15:28:55 +01001532 struct sk_buff *skb, *tmp;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001533 struct txq_info *txqi;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001534 unsigned long flags;
Johannes Berge2ebc742007-07-27 15:43:22 +02001535
Johannes Berg252b86c2011-11-16 15:28:55 +01001536 skb_queue_walk_safe(skbs, skb, tmp) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001537 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1538 int q = info->hw_queue;
1539
1540#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1541 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1542 __skb_unlink(skb, skbs);
Felix Fietkauc3e77242012-10-08 14:39:33 +02001543 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001544 continue;
1545 }
1546#endif
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001547
Michal Kazior80a83cf2016-05-19 10:37:48 +02001548 txqi = ieee80211_get_txq(local, vif, sta, skb);
1549 if (txqi) {
1550 info->control.vif = vif;
1551
1552 __skb_unlink(skb, skbs);
1553
Michal Kaziorfa962b92016-05-19 10:37:49 +02001554 spin_lock_bh(&fq->lock);
Michal Kazior80a83cf2016-05-19 10:37:48 +02001555 ieee80211_txq_enqueue(local, txqi, skb);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001556 spin_unlock_bh(&fq->lock);
Michal Kazior80a83cf2016-05-19 10:37:48 +02001557
1558 drv_wake_tx_queue(local, txqi);
1559
1560 continue;
1561 }
1562
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001563 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001564 if (local->queue_stop_reasons[q] ||
Johannes Berg7bb45682011-02-24 14:42:06 +01001565 (!txpending && !skb_queue_empty(&local->pending[q]))) {
Seth Forshee6c17b772013-02-11 11:21:07 -06001566 if (unlikely(info->flags &
Seth Forsheea7679ed2013-02-25 14:58:05 -06001567 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1568 if (local->queue_stop_reasons[q] &
1569 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1570 /*
1571 * Drop off-channel frames if queues
1572 * are stopped for any reason other
1573 * than off-channel operation. Never
1574 * queue them.
1575 */
1576 spin_unlock_irqrestore(
1577 &local->queue_stop_reason_lock,
1578 flags);
1579 ieee80211_purge_tx_queue(&local->hw,
1580 skbs);
1581 return true;
1582 }
1583 } else {
1584
Seth Forshee6c17b772013-02-11 11:21:07 -06001585 /*
Seth Forsheea7679ed2013-02-25 14:58:05 -06001586 * Since queue is stopped, queue up frames for
1587 * later transmission from the tx-pending
1588 * tasklet when the queue is woken again.
Seth Forshee6c17b772013-02-11 11:21:07 -06001589 */
Seth Forsheea7679ed2013-02-25 14:58:05 -06001590 if (txpending)
1591 skb_queue_splice_init(skbs,
1592 &local->pending[q]);
1593 else
1594 skb_queue_splice_tail_init(skbs,
1595 &local->pending[q]);
1596
1597 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1598 flags);
1599 return false;
Seth Forshee6c17b772013-02-11 11:21:07 -06001600 }
Johannes Berg7bb45682011-02-24 14:42:06 +01001601 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001602 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Tomas Winklerf8e79dd2008-07-24 18:46:44 +03001603
Johannes Berg11127e92011-11-16 16:02:47 +01001604 info->control.vif = vif;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001605 control.sta = sta;
Johannes Bergec25acc2010-07-22 17:11:28 +02001606
Johannes Berg252b86c2011-11-16 15:28:55 +01001607 __skb_unlink(skb, skbs);
Michal Kazior80a83cf2016-05-19 10:37:48 +02001608 drv_tx(local, &control, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001609 }
Johannes Berg2de8e0d2009-03-23 17:28:35 +01001610
Johannes Berg11127e92011-11-16 16:02:47 +01001611 return true;
1612}
1613
1614/*
1615 * Returns false if the frame couldn't be transmitted but was queued instead.
1616 */
1617static bool __ieee80211_tx(struct ieee80211_local *local,
1618 struct sk_buff_head *skbs, int led_len,
1619 struct sta_info *sta, bool txpending)
1620{
1621 struct ieee80211_tx_info *info;
1622 struct ieee80211_sub_if_data *sdata;
1623 struct ieee80211_vif *vif;
1624 struct ieee80211_sta *pubsta;
1625 struct sk_buff *skb;
1626 bool result = true;
1627 __le16 fc;
1628
1629 if (WARN_ON(skb_queue_empty(skbs)))
1630 return true;
1631
1632 skb = skb_peek(skbs);
1633 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1634 info = IEEE80211_SKB_CB(skb);
1635 sdata = vif_to_sdata(info->control.vif);
1636 if (sta && !sta->uploaded)
1637 sta = NULL;
1638
1639 if (sta)
1640 pubsta = &sta->sta;
1641 else
1642 pubsta = NULL;
1643
1644 switch (sdata->vif.type) {
1645 case NL80211_IFTYPE_MONITOR:
Johannes Bergc82b5a72013-07-14 23:39:20 +03001646 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
1647 vif = &sdata->vif;
1648 break;
1649 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001650 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001651 if (sdata) {
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001652 vif = &sdata->vif;
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001653 info->hw_queue =
1654 vif->hw_queue[skb_get_queue_mapping(skb)];
Johannes Berg30686bf2015-06-02 21:39:54 +02001655 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
Johannes Berg63b4d8b2015-11-24 15:41:50 +01001656 ieee80211_purge_tx_queue(&local->hw, skbs);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001657 return true;
1658 } else
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001659 vif = NULL;
Johannes Berg11127e92011-11-16 16:02:47 +01001660 break;
1661 case NL80211_IFTYPE_AP_VLAN:
1662 sdata = container_of(sdata->bss,
1663 struct ieee80211_sub_if_data, u.ap);
1664 /* fall through */
1665 default:
1666 vif = &sdata->vif;
1667 break;
1668 }
1669
Johannes Bergcb831b52012-07-02 15:40:18 +02001670 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1671 txpending);
Johannes Berg11127e92011-11-16 16:02:47 +01001672
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001673 ieee80211_tpt_led_trig_tx(local, fc, led_len);
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001674
Johannes Berg4db4e0a2011-11-24 14:47:36 +01001675 WARN_ON_ONCE(!skb_queue_empty(skbs));
Johannes Berg252b86c2011-11-16 15:28:55 +01001676
Johannes Berg11127e92011-11-16 16:02:47 +01001677 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001678}
1679
Johannes Berg97b045d2008-06-20 01:22:30 +02001680/*
1681 * Invoke TX handlers, return 0 on success and non-zero if the
1682 * frame was dropped or queued.
1683 */
1684static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1685{
Johannes Berg252b86c2011-11-16 15:28:55 +01001686 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg97b045d2008-06-20 01:22:30 +02001687 ieee80211_tx_result res = TX_DROP;
Johannes Berg97b045d2008-06-20 01:22:30 +02001688
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001689#define CALL_TXH(txh) \
1690 do { \
1691 res = txh(tx); \
1692 if (res != TX_CONTINUE) \
1693 goto txh_done; \
1694 } while (0)
Johannes Berg97b045d2008-06-20 01:22:30 +02001695
Kalle Valo5c1b98a2010-01-12 10:42:46 +02001696 CALL_TXH(ieee80211_tx_h_dynamic_ps);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001697 CALL_TXH(ieee80211_tx_h_check_assoc);
1698 CALL_TXH(ieee80211_tx_h_ps_buf);
Johannes Berga621fa42010-08-27 14:26:54 +03001699 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001700 CALL_TXH(ieee80211_tx_h_select_key);
Johannes Berg30686bf2015-06-02 21:39:54 +02001701 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Johannes Bergaf65cd962009-11-17 18:18:36 +01001702 CALL_TXH(ieee80211_tx_h_rate_ctrl);
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001703
Johannes Bergaa5b5492011-12-02 22:08:52 +01001704 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1705 __skb_queue_tail(&tx->skbs, tx->skb);
1706 tx->skb = NULL;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001707 goto txh_done;
Johannes Bergaa5b5492011-12-02 22:08:52 +01001708 }
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001709
1710 CALL_TXH(ieee80211_tx_h_michael_mic_add);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001711 CALL_TXH(ieee80211_tx_h_sequence);
1712 CALL_TXH(ieee80211_tx_h_fragment);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001713 /* handlers after fragment must be aware of tx info fragmentation! */
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001714 CALL_TXH(ieee80211_tx_h_stats);
1715 CALL_TXH(ieee80211_tx_h_encrypt);
Johannes Berg30686bf2015-06-02 21:39:54 +02001716 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Arik Nemtsov8fd369e2011-01-31 22:29:12 +02001717 CALL_TXH(ieee80211_tx_h_calculate_duration);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001718#undef CALL_TXH
1719
1720 txh_done:
Johannes Berg97b045d2008-06-20 01:22:30 +02001721 if (unlikely(res == TX_DROP)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001722 I802_DEBUG_INC(tx->local->tx_handlers_drop);
Johannes Berg252b86c2011-11-16 15:28:55 +01001723 if (tx->skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001724 ieee80211_free_txskb(&tx->local->hw, tx->skb);
Johannes Berg252b86c2011-11-16 15:28:55 +01001725 else
Felix Fietkau1f98ab72012-11-10 03:44:14 +01001726 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
Johannes Berg97b045d2008-06-20 01:22:30 +02001727 return -1;
1728 } else if (unlikely(res == TX_QUEUED)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001729 I802_DEBUG_INC(tx->local->tx_handlers_queued);
Johannes Berg97b045d2008-06-20 01:22:30 +02001730 return -1;
1731 }
1732
1733 return 0;
1734}
1735
Felix Fietkau06be6b12013-10-14 18:01:00 +02001736bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1737 struct ieee80211_vif *vif, struct sk_buff *skb,
1738 int band, struct ieee80211_sta **sta)
1739{
1740 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1741 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1742 struct ieee80211_tx_data tx;
Johannes Berg88724a82015-03-01 09:10:12 +02001743 struct sk_buff *skb2;
Felix Fietkau06be6b12013-10-14 18:01:00 +02001744
Johannes Berg7c107702015-03-20 14:18:27 +01001745 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
Felix Fietkau06be6b12013-10-14 18:01:00 +02001746 return false;
1747
1748 info->band = band;
1749 info->control.vif = vif;
1750 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1751
1752 if (invoke_tx_handlers(&tx))
1753 return false;
1754
1755 if (sta) {
1756 if (tx.sta)
1757 *sta = &tx.sta->sta;
1758 else
1759 *sta = NULL;
1760 }
1761
Johannes Berg88724a82015-03-01 09:10:12 +02001762 /* this function isn't suitable for fragmented data frames */
1763 skb2 = __skb_dequeue(&tx.skbs);
1764 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1765 ieee80211_free_txskb(hw, skb2);
1766 ieee80211_purge_tx_queue(hw, &tx.skbs);
1767 return false;
1768 }
1769
Felix Fietkau06be6b12013-10-14 18:01:00 +02001770 return true;
1771}
1772EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1773
Johannes Berg7bb45682011-02-24 14:42:06 +01001774/*
1775 * Returns false if the frame couldn't be transmitted but was queued instead.
1776 */
1777static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01001778 struct sta_info *sta, struct sk_buff *skb,
1779 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001780{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001781 struct ieee80211_local *local = sdata->local;
Johannes Berg5cf121c2008-02-25 16:27:43 +01001782 struct ieee80211_tx_data tx;
Johannes Berg97b045d2008-06-20 01:22:30 +02001783 ieee80211_tx_result res_prepare;
Johannes Berge039fa42008-05-15 12:55:29 +02001784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001785 bool result = true;
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001786 int led_len;
Johannes Berge2ebc742007-07-27 15:43:22 +02001787
Johannes Berge2ebc742007-07-27 15:43:22 +02001788 if (unlikely(skb->len < 10)) {
1789 dev_kfree_skb(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001790 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001791 }
1792
Johannes Berg58d41852007-09-26 17:53:18 +02001793 /* initialises tx */
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001794 led_len = skb->len;
Johannes Berg7c107702015-03-20 14:18:27 +01001795 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001796
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001797 if (unlikely(res_prepare == TX_DROP)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001798 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg55de9082012-07-26 17:24:39 +02001799 return true;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001800 } else if (unlikely(res_prepare == TX_QUEUED)) {
Johannes Berg55de9082012-07-26 17:24:39 +02001801 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001802 }
1803
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001804 /* set up hw_queue value early */
1805 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
Johannes Berg30686bf2015-06-02 21:39:54 +02001806 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001807 info->hw_queue =
1808 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1809
Johannes Berg7bb45682011-02-24 14:42:06 +01001810 if (!invoke_tx_handlers(&tx))
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001811 result = __ieee80211_tx(local, &tx.skbs, led_len,
1812 tx.sta, txpending);
Johannes Berg55de9082012-07-26 17:24:39 +02001813
Johannes Berg7bb45682011-02-24 14:42:06 +01001814 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001815}
1816
1817/* device xmit handlers */
1818
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301819static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
Johannes Berg23c07522008-05-29 10:38:53 +02001820 struct sk_buff *skb,
1821 int head_need, bool may_encrypt)
1822{
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301823 struct ieee80211_local *local = sdata->local;
Johannes Berg23c07522008-05-29 10:38:53 +02001824 int tail_need = 0;
1825
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301826 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
Johannes Berg23c07522008-05-29 10:38:53 +02001827 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1828 tail_need -= skb_tailroom(skb);
1829 tail_need = max_t(int, tail_need, 0);
1830 }
1831
Ido Yarivc70f59a2014-07-29 15:39:14 +03001832 if (skb_cloned(skb) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001833 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
Ido Yarivc70f59a2014-07-29 15:39:14 +03001834 !skb_clone_writable(skb, ETH_HLEN) ||
Johannes Berg17c18bf2015-03-21 15:25:43 +01001835 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
Johannes Berg23c07522008-05-29 10:38:53 +02001836 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001837 else if (head_need || tail_need)
Johannes Berg23c07522008-05-29 10:38:53 +02001838 I802_DEBUG_INC(local->tx_expand_skb_head);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001839 else
1840 return 0;
Johannes Berg23c07522008-05-29 10:38:53 +02001841
1842 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001843 wiphy_debug(local->hw.wiphy,
1844 "failed to reallocate TX buffer\n");
Johannes Berg23c07522008-05-29 10:38:53 +02001845 return -ENOMEM;
1846 }
1847
Johannes Berg23c07522008-05-29 10:38:53 +02001848 return 0;
1849}
1850
Johannes Berg7c107702015-03-20 14:18:27 +01001851void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1852 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001853{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001854 struct ieee80211_local *local = sdata->local;
Johannes Berge039fa42008-05-15 12:55:29 +02001855 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02001856 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berge2ebc742007-07-27 15:43:22 +02001857 int headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001858 bool may_encrypt;
Johannes Berge2ebc742007-07-27 15:43:22 +02001859
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001860 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
Johannes Berg23c07522008-05-29 10:38:53 +02001861
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001862 headroom = local->tx_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001863 if (may_encrypt)
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001864 headroom += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001865 headroom -= skb_headroom(skb);
1866 headroom = max_t(int, 0, headroom);
1867
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301868 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001869 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001870 return;
Johannes Berge2ebc742007-07-27 15:43:22 +02001871 }
1872
Steve deRosier740c1aa2010-09-11 20:01:31 -07001873 hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berg5061b0c2009-07-14 00:33:34 +02001874 info->control.vif = &sdata->vif;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001875
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001876 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1877 if (ieee80211_is_data(hdr->frame_control) &&
1878 is_unicast_ether_addr(hdr->addr1)) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01001879 if (mesh_nexthop_resolve(sdata, skb))
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001880 return; /* skb queued: don't free */
1881 } else {
1882 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1883 }
Johannes Berg98aed9f2012-03-27 14:18:36 +02001884 }
Javier Cardonacca89492009-08-10 17:29:29 -07001885
Javier Cardona2154c812011-09-07 17:49:53 -07001886 ieee80211_set_qos_hdr(sdata, skb);
Johannes Berg7c107702015-03-20 14:18:27 +01001887 ieee80211_tx(sdata, sta, skb, false);
Johannes Berge2ebc742007-07-27 15:43:22 +02001888}
1889
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001890static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1891 struct sk_buff *skb)
Johannes Berg73b9f032011-10-07 14:01:26 +02001892{
1893 struct ieee80211_radiotap_iterator iterator;
1894 struct ieee80211_radiotap_header *rthdr =
1895 (struct ieee80211_radiotap_header *) skb->data;
1896 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001897 struct ieee80211_supported_band *sband =
1898 local->hw.wiphy->bands[info->band];
Johannes Berg73b9f032011-10-07 14:01:26 +02001899 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1900 NULL);
1901 u16 txflags;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001902 u16 rate = 0;
1903 bool rate_found = false;
1904 u8 rate_retries = 0;
1905 u16 rate_flags = 0;
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01001906 u8 mcs_known, mcs_flags, mcs_bw;
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01001907 u16 vht_known;
1908 u8 vht_mcs = 0, vht_nss = 0;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001909 int i;
Johannes Berg73b9f032011-10-07 14:01:26 +02001910
1911 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1912 IEEE80211_TX_CTL_DONTFRAG;
1913
1914 /*
1915 * for every radiotap entry that is present
1916 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1917 * entries present, or -EINVAL on error)
1918 */
1919
1920 while (!ret) {
1921 ret = ieee80211_radiotap_iterator_next(&iterator);
1922
1923 if (ret)
1924 continue;
1925
1926 /* see if this argument is something we can use */
1927 switch (iterator.this_arg_index) {
1928 /*
1929 * You must take care when dereferencing iterator.this_arg
1930 * for multibyte types... the pointer is not aligned. Use
1931 * get_unaligned((type *)iterator.this_arg) to dereference
1932 * iterator.this_arg for type "type" safely on all arches.
1933 */
1934 case IEEE80211_RADIOTAP_FLAGS:
1935 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1936 /*
1937 * this indicates that the skb we have been
1938 * handed has the 32-bit FCS CRC at the end...
1939 * we should react to that by snipping it off
1940 * because it will be recomputed and added
1941 * on transmission
1942 */
1943 if (skb->len < (iterator._max_length + FCS_LEN))
1944 return false;
1945
1946 skb_trim(skb, skb->len - FCS_LEN);
1947 }
1948 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1949 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1950 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1951 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1952 break;
1953
1954 case IEEE80211_RADIOTAP_TX_FLAGS:
1955 txflags = get_unaligned_le16(iterator.this_arg);
1956 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1957 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1958 break;
1959
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001960 case IEEE80211_RADIOTAP_RATE:
1961 rate = *iterator.this_arg;
1962 rate_flags = 0;
1963 rate_found = true;
1964 break;
1965
1966 case IEEE80211_RADIOTAP_DATA_RETRIES:
1967 rate_retries = *iterator.this_arg;
1968 break;
1969
1970 case IEEE80211_RADIOTAP_MCS:
1971 mcs_known = iterator.this_arg[0];
1972 mcs_flags = iterator.this_arg[1];
1973 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
1974 break;
1975
1976 rate_found = true;
1977 rate = iterator.this_arg[2];
1978 rate_flags = IEEE80211_TX_RC_MCS;
1979
1980 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
1981 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
1982 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
1983
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01001984 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001985 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01001986 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001987 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1988 break;
1989
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01001990 case IEEE80211_RADIOTAP_VHT:
1991 vht_known = get_unaligned_le16(iterator.this_arg);
1992 rate_found = true;
1993
1994 rate_flags = IEEE80211_TX_RC_VHT_MCS;
1995 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
1996 (iterator.this_arg[2] &
1997 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
1998 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
1999 if (vht_known &
2000 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2001 if (iterator.this_arg[3] == 1)
2002 rate_flags |=
2003 IEEE80211_TX_RC_40_MHZ_WIDTH;
2004 else if (iterator.this_arg[3] == 4)
2005 rate_flags |=
2006 IEEE80211_TX_RC_80_MHZ_WIDTH;
2007 else if (iterator.this_arg[3] == 11)
2008 rate_flags |=
2009 IEEE80211_TX_RC_160_MHZ_WIDTH;
2010 }
2011
2012 vht_mcs = iterator.this_arg[4] >> 4;
2013 vht_nss = iterator.this_arg[4] & 0xF;
2014 break;
2015
Johannes Berg73b9f032011-10-07 14:01:26 +02002016 /*
2017 * Please update the file
2018 * Documentation/networking/mac80211-injection.txt
2019 * when parsing new fields here.
2020 */
2021
2022 default:
2023 break;
2024 }
2025 }
2026
2027 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2028 return false;
2029
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002030 if (rate_found) {
2031 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2032
2033 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2034 info->control.rates[i].idx = -1;
2035 info->control.rates[i].flags = 0;
2036 info->control.rates[i].count = 0;
2037 }
2038
2039 if (rate_flags & IEEE80211_TX_RC_MCS) {
2040 info->control.rates[0].idx = rate;
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01002041 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2042 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2043 vht_nss);
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002044 } else {
2045 for (i = 0; i < sband->n_bitrates; i++) {
2046 if (rate * 5 != sband->bitrates[i].bitrate)
2047 continue;
2048
2049 info->control.rates[0].idx = i;
2050 break;
2051 }
2052 }
2053
Felix Fietkau07310a62016-03-02 15:54:51 +01002054 if (info->control.rates[0].idx < 0)
2055 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2056
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002057 info->control.rates[0].flags = rate_flags;
2058 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2059 local->hw.max_rate_tries);
2060 }
2061
Johannes Berg73b9f032011-10-07 14:01:26 +02002062 /*
2063 * remove the radiotap header
2064 * iterator->_max_length was sanity-checked against
2065 * skb->len by iterator init
2066 */
2067 skb_pull(skb, iterator._max_length);
2068
2069 return true;
2070}
2071
Stephen Hemmingerd0cf9c02009-08-31 19:50:57 +00002072netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2073 struct net_device *dev)
Johannes Berge2ebc742007-07-27 15:43:22 +02002074{
2075 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Johannes Berg55de9082012-07-26 17:24:39 +02002076 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02002077 struct ieee80211_radiotap_header *prthdr =
2078 (struct ieee80211_radiotap_header *)skb->data;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002079 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002080 struct ieee80211_hdr *hdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002081 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002082 struct cfg80211_chan_def *chandef;
Andy Green9b8a74e2007-07-27 15:43:24 +02002083 u16 len_rthdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002084 int hdrlen;
Johannes Berge2ebc742007-07-27 15:43:22 +02002085
Andy Green9b8a74e2007-07-27 15:43:24 +02002086 /* check for not even having the fixed radiotap header part */
2087 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2088 goto fail; /* too short to be possibly valid */
2089
2090 /* is it a header version we can trust to find length from? */
2091 if (unlikely(prthdr->it_version))
2092 goto fail; /* only version 0 is supported */
2093
2094 /* then there must be a radiotap header with a length we can use */
2095 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2096
2097 /* does the skb contain enough to deliver on the alleged length? */
2098 if (unlikely(skb->len < len_rthdr))
2099 goto fail; /* skb too short for claimed rt header extent */
Johannes Berge2ebc742007-07-27 15:43:22 +02002100
Johannes Berge2ebc742007-07-27 15:43:22 +02002101 /*
2102 * fix up the pointers accounting for the radiotap
2103 * header still being in there. We are being given
2104 * a precooked IEEE80211 header so no need for
2105 * normal processing
2106 */
Andy Green9b8a74e2007-07-27 15:43:24 +02002107 skb_set_mac_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02002108 /*
Andy Green9b8a74e2007-07-27 15:43:24 +02002109 * these are just fixed to the end of the rt area since we
2110 * don't have any better information and at this point, nobody cares
Johannes Berge2ebc742007-07-27 15:43:22 +02002111 */
Andy Green9b8a74e2007-07-27 15:43:24 +02002112 skb_set_network_header(skb, len_rthdr);
2113 skb_set_transport_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02002114
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002115 if (skb->len < len_rthdr + 2)
2116 goto fail;
2117
2118 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2119 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2120
2121 if (skb->len < len_rthdr + hdrlen)
2122 goto fail;
2123
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002124 /*
2125 * Initialize skb->protocol if the injected frame is a data frame
2126 * carrying a rfc1042 header
2127 */
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002128 if (ieee80211_is_data(hdr->frame_control) &&
2129 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2130 u8 *payload = (u8 *)hdr + hdrlen;
2131
Joe Perchesb203ca32012-05-08 18:56:52 +00002132 if (ether_addr_equal(payload, rfc1042_header))
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002133 skb->protocol = cpu_to_be16((payload[6] << 8) |
2134 payload[7]);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002135 }
2136
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002137 memset(info, 0, sizeof(*info));
2138
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002139 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
Johannes Berg73b9f032011-10-07 14:01:26 +02002140 IEEE80211_TX_CTL_INJECTED;
2141
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002142 rcu_read_lock();
2143
2144 /*
2145 * We process outgoing injected frames that have a local address
2146 * we handle as though they are non-injected frames.
2147 * This code here isn't entirely correct, the local MAC address
2148 * isn't always enough to find the interface to use; for proper
2149 * VLAN/WDS support we will need a different mechanism (which
2150 * likely isn't going to be monitor interfaces).
2151 */
2152 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2153
2154 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2155 if (!ieee80211_sdata_running(tmp_sdata))
2156 continue;
2157 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2158 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2159 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2160 continue;
Joe Perchesb203ca32012-05-08 18:56:52 +00002161 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002162 sdata = tmp_sdata;
2163 break;
2164 }
2165 }
Johannes Berg7351c6b2009-11-19 01:08:30 +01002166
Johannes Berg55de9082012-07-26 17:24:39 +02002167 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2168 if (!chanctx_conf) {
2169 tmp_sdata = rcu_dereference(local->monitor_sdata);
2170 if (tmp_sdata)
2171 chanctx_conf =
2172 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2173 }
Johannes Berg55de9082012-07-26 17:24:39 +02002174
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002175 if (chanctx_conf)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002176 chandef = &chanctx_conf->def;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002177 else if (!local->use_chanctx)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002178 chandef = &local->_oper_chandef;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002179 else
2180 goto fail_rcu;
Johannes Berg55de9082012-07-26 17:24:39 +02002181
2182 /*
2183 * Frame injection is not allowed if beaconing is not allowed
2184 * or if we need radar detection. Beaconing is usually not allowed when
2185 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2186 * Passive scan is also used in world regulatory domains where
2187 * your country is not known and as such it should be treated as
2188 * NO TX unless the channel is explicitly allowed in which case
2189 * your current regulatory domain would not have the passive scan
2190 * flag.
2191 *
2192 * Since AP mode uses monitor interfaces to inject/TX management
2193 * frames we can make AP mode the exception to this rule once it
2194 * supports radar detection as its implementation can deal with
2195 * radar detection by itself. We can do that later by adding a
2196 * monitor flag interfaces used for AP support.
2197 */
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002198 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2199 sdata->vif.type))
Johannes Berg55de9082012-07-26 17:24:39 +02002200 goto fail_rcu;
2201
Johannes Berg73c4e192014-11-09 18:50:09 +02002202 info->band = chandef->chan->band;
Lorenzo Bianconi109843b02016-02-19 12:18:01 +01002203
2204 /* process and remove the injection radiotap header */
2205 if (!ieee80211_parse_tx_radiotap(local, skb))
2206 goto fail_rcu;
2207
Johannes Berg7c107702015-03-20 14:18:27 +01002208 ieee80211_xmit(sdata, NULL, skb);
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002209 rcu_read_unlock();
2210
Johannes Berge2ebc742007-07-27 15:43:22 +02002211 return NETDEV_TX_OK;
Andy Green9b8a74e2007-07-27 15:43:24 +02002212
Johannes Berg55de9082012-07-26 17:24:39 +02002213fail_rcu:
2214 rcu_read_unlock();
Andy Green9b8a74e2007-07-27 15:43:24 +02002215fail:
2216 dev_kfree_skb(skb);
2217 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
Johannes Berge2ebc742007-07-27 15:43:22 +02002218}
2219
Johannes Berg97ffe752015-03-21 09:13:45 +01002220static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002221{
Johannes Berg97ffe752015-03-21 09:13:45 +01002222 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002223
Johannes Berg97ffe752015-03-21 09:13:45 +01002224 return ethertype == ETH_P_TDLS &&
2225 skb->len > 14 &&
2226 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2227}
2228
2229static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2230 struct sk_buff *skb,
2231 struct sta_info **sta_out)
2232{
2233 struct sta_info *sta;
2234
2235 switch (sdata->vif.type) {
2236 case NL80211_IFTYPE_AP_VLAN:
2237 sta = rcu_dereference(sdata->u.vlan.sta);
2238 if (sta) {
2239 *sta_out = sta;
2240 return 0;
2241 } else if (sdata->wdev.use_4addr) {
2242 return -ENOLINK;
2243 }
2244 /* fall through */
2245 case NL80211_IFTYPE_AP:
2246 case NL80211_IFTYPE_OCB:
2247 case NL80211_IFTYPE_ADHOC:
2248 if (is_multicast_ether_addr(skb->data)) {
2249 *sta_out = ERR_PTR(-ENOENT);
2250 return 0;
2251 }
2252 sta = sta_info_get_bss(sdata, skb->data);
2253 break;
2254 case NL80211_IFTYPE_WDS:
2255 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2256 break;
2257#ifdef CONFIG_MAC80211_MESH
2258 case NL80211_IFTYPE_MESH_POINT:
2259 /* determined much later */
2260 *sta_out = NULL;
2261 return 0;
2262#endif
2263 case NL80211_IFTYPE_STATION:
2264 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2265 sta = sta_info_get(sdata, skb->data);
2266 if (sta) {
2267 bool tdls_peer, tdls_auth;
2268
2269 tdls_peer = test_sta_flag(sta,
2270 WLAN_STA_TDLS_PEER);
2271 tdls_auth = test_sta_flag(sta,
2272 WLAN_STA_TDLS_PEER_AUTH);
2273
2274 if (tdls_peer && tdls_auth) {
2275 *sta_out = sta;
2276 return 0;
2277 }
2278
2279 /*
2280 * TDLS link during setup - throw out frames to
2281 * peer. Allow TDLS-setup frames to unauthorized
2282 * peers for the special case of a link teardown
2283 * after a TDLS sta is removed due to being
2284 * unreachable.
2285 */
2286 if (tdls_peer && !tdls_auth &&
2287 !ieee80211_is_tdls_setup(skb))
2288 return -EINVAL;
2289 }
2290
2291 }
2292
2293 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2294 if (!sta)
2295 return -ENOLINK;
2296 break;
2297 default:
2298 return -EINVAL;
2299 }
2300
2301 *sta_out = sta ?: ERR_PTR(-ENOENT);
2302 return 0;
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002303}
2304
Johannes Berge2ebc742007-07-27 15:43:22 +02002305/**
Johannes Berg4c9451e2014-11-09 18:50:10 +02002306 * ieee80211_build_hdr - build 802.11 header in the given frame
2307 * @sdata: virtual interface to build the header for
2308 * @skb: the skb to build the header in
Liad Kaufman24d342c2014-11-09 18:50:07 +02002309 * @info_flags: skb flags to set
Johannes Berge2ebc742007-07-27 15:43:22 +02002310 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02002311 * This function takes the skb with 802.3 header and reformats the header to
2312 * the appropriate IEEE 802.11 header based on which interface the packet is
2313 * being transmitted on.
Johannes Berge2ebc742007-07-27 15:43:22 +02002314 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02002315 * Note that this function also takes care of the TX status request and
2316 * potential unsharing of the SKB - this needs to be interleaved with the
2317 * header building.
2318 *
2319 * The function requires the read-side RCU lock held
2320 *
2321 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
Johannes Berge2ebc742007-07-27 15:43:22 +02002322 */
Johannes Berg4c9451e2014-11-09 18:50:10 +02002323static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01002324 struct sk_buff *skb, u32 info_flags,
Johannes Berg97ffe752015-03-21 09:13:45 +01002325 struct sta_info *sta)
Johannes Berge2ebc742007-07-27 15:43:22 +02002326{
Johannes Berg133b8222008-09-16 14:18:59 +02002327 struct ieee80211_local *local = sdata->local;
Felix Fietkau489ee912010-12-18 19:30:48 +01002328 struct ieee80211_tx_info *info;
Johannes Bergdcf33962012-07-30 15:11:56 +02002329 int head_need;
Harvey Harrison065e96052008-06-22 16:45:27 -07002330 u16 ethertype, hdrlen, meshhdrlen = 0;
2331 __le16 fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002332 struct ieee80211_hdr hdr;
Wey-Yi Guyff67bb82010-08-21 07:23:29 -07002333 struct ieee80211s_hdr mesh_hdr __maybe_unused;
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002334 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +02002335 const u8 *encaps_data;
2336 int encaps_len, skip_header_bytes;
Jiri Slabye8bf9642007-08-28 17:01:54 -04002337 int nh_pos, h_pos;
Johannes Berg97ffe752015-03-21 09:13:45 +01002338 bool wme_sta = false, authorized = false;
2339 bool tdls_peer;
Johannes Berga729cff2011-11-06 14:13:34 +01002340 bool multicast;
Johannes Berga729cff2011-11-06 14:13:34 +01002341 u16 info_id = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02002342 struct ieee80211_chanctx_conf *chanctx_conf;
2343 struct ieee80211_sub_if_data *ap_sdata;
Johannes Berg57fbcce2016-04-12 15:56:15 +02002344 enum nl80211_band band;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002345 int ret;
Johannes Berge2ebc742007-07-27 15:43:22 +02002346
Johannes Berg97ffe752015-03-21 09:13:45 +01002347 if (IS_ERR(sta))
2348 sta = NULL;
2349
Johannes Berge2ebc742007-07-27 15:43:22 +02002350 /* convert Ethernet header to proper 802.11 header (based on
2351 * operation mode) */
2352 ethertype = (skb->data[12] << 8) | skb->data[13];
Harvey Harrison065e96052008-06-22 16:45:27 -07002353 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
Johannes Berge2ebc742007-07-27 15:43:22 +02002354
Johannes Berg51fb61e2007-12-19 01:31:27 +01002355 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +02002356 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg97ffe752015-03-21 09:13:45 +01002357 if (sdata->wdev.use_4addr) {
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002358 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2359 /* RA TA DA SA */
2360 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002361 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002362 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2363 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2364 hdrlen = 30;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002365 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02002366 wme_sta = sta->sta.wme;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002367 }
Johannes Berg55de9082012-07-26 17:24:39 +02002368 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2369 u.ap);
2370 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002371 if (!chanctx_conf) {
2372 ret = -ENOTCONN;
2373 goto free;
2374 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002375 band = chanctx_conf->def.chan->band;
Johannes Berg97ffe752015-03-21 09:13:45 +01002376 if (sdata->wdev.use_4addr)
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002377 break;
2378 /* fall through */
2379 case NL80211_IFTYPE_AP:
Arnd Bergmannfe801232013-01-25 14:14:33 +00002380 if (sdata->vif.type == NL80211_IFTYPE_AP)
2381 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002382 if (!chanctx_conf) {
2383 ret = -ENOTCONN;
2384 goto free;
2385 }
Harvey Harrison065e96052008-06-22 16:45:27 -07002386 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002387 /* DA BSSID SA */
2388 memcpy(hdr.addr1, skb->data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002389 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002390 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2391 hdrlen = 24;
Johannes Berg4bf88532012-11-09 11:39:59 +01002392 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002393 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002394 case NL80211_IFTYPE_WDS:
Harvey Harrison065e96052008-06-22 16:45:27 -07002395 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002396 /* RA TA DA SA */
2397 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002398 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002399 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2400 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2401 hdrlen = 30;
Johannes Berg55de9082012-07-26 17:24:39 +02002402 /*
2403 * This is the exception! WDS style interfaces are prohibited
2404 * when channel contexts are in used so this must be valid
2405 */
Karl Beldan675a0b02013-03-25 16:26:57 +01002406 band = local->hw.conf.chandef.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002407 break;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002408#ifdef CONFIG_MAC80211_MESH
Johannes Berg05c914f2008-09-11 00:01:58 +02002409 case NL80211_IFTYPE_MESH_POINT:
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002410 if (!is_multicast_ether_addr(skb->data)) {
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002411 struct sta_info *next_hop;
2412 bool mpp_lookup = true;
2413
Johannes Bergbf7cd942013-02-15 14:40:31 +01002414 mpath = mesh_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002415 if (mpath) {
2416 mpp_lookup = false;
2417 next_hop = rcu_dereference(mpath->next_hop);
2418 if (!next_hop ||
2419 !(mpath->flags & (MESH_PATH_ACTIVE |
2420 MESH_PATH_RESOLVING)))
2421 mpp_lookup = true;
2422 }
2423
Henning Roggeab1c7902016-02-03 13:58:37 +01002424 if (mpp_lookup) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01002425 mppath = mpp_path_lookup(sdata, skb->data);
Henning Roggeab1c7902016-02-03 13:58:37 +01002426 if (mppath)
2427 mppath->exp_time = jiffies;
2428 }
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002429
2430 if (mppath && mpath)
Bob Copeland2bdaf382016-02-28 20:03:56 -05002431 mesh_path_del(sdata, mpath->dst);
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002432 }
YanBo79617de2008-09-22 13:30:32 +08002433
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002434 /*
Joel A Fernandes9d525012011-01-10 00:44:23 -06002435 * Use address extension if it is a packet from
2436 * another interface or if we know the destination
2437 * is being proxied by a portal (i.e. portal address
2438 * differs from proxied address)
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002439 */
Joe Perchesb203ca32012-05-08 18:56:52 +00002440 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2441 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
Javier Cardona3c5772a2009-08-10 12:15:48 -07002442 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2443 skb->data, skb->data + ETH_ALEN);
Johannes Bergbf7cd942013-02-15 14:40:31 +01002444 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2445 NULL, NULL);
YanBo79617de2008-09-22 13:30:32 +08002446 } else {
Thomas Pedersen27f01122012-08-20 11:28:25 -07002447 /* DS -> MBSS (802.11-2012 13.11.3.3).
2448 * For unicast with unknown forwarding information,
2449 * destination might be in the MBSS or if that fails
2450 * forwarded to another mesh gate. In either case
2451 * resolution will be handled in ieee80211_xmit(), so
2452 * leave the original DA. This also works for mcast */
2453 const u8 *mesh_da = skb->data;
YanBo79617de2008-09-22 13:30:32 +08002454
Thomas Pedersen27f01122012-08-20 11:28:25 -07002455 if (mppath)
2456 mesh_da = mppath->mpp;
2457 else if (mpath)
2458 mesh_da = mpath->dst;
Thomas Pedersen27f01122012-08-20 11:28:25 -07002459
Javier Cardona3c5772a2009-08-10 12:15:48 -07002460 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
Johannes Berg47846c92009-11-25 17:46:19 +01002461 mesh_da, sdata->vif.addr);
Thomas Pedersen27f01122012-08-20 11:28:25 -07002462 if (is_multicast_ether_addr(mesh_da))
2463 /* DA TA mSA AE:SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002464 meshhdrlen = ieee80211_new_mesh_header(
2465 sdata, &mesh_hdr,
2466 skb->data + ETH_ALEN, NULL);
Javier Cardona3c5772a2009-08-10 12:15:48 -07002467 else
Thomas Pedersen27f01122012-08-20 11:28:25 -07002468 /* RA TA mDA mSA AE:DA SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002469 meshhdrlen = ieee80211_new_mesh_header(
2470 sdata, &mesh_hdr, skb->data,
2471 skb->data + ETH_ALEN);
YanBo79617de2008-09-22 13:30:32 +08002472
YanBo79617de2008-09-22 13:30:32 +08002473 }
Johannes Berg55de9082012-07-26 17:24:39 +02002474 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002475 if (!chanctx_conf) {
2476 ret = -ENOTCONN;
2477 goto free;
2478 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002479 band = chanctx_conf->def.chan->band;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002480 break;
2481#endif
Johannes Berg05c914f2008-09-11 00:01:58 +02002482 case NL80211_IFTYPE_STATION:
Johannes Berg97ffe752015-03-21 09:13:45 +01002483 /* we already did checks when looking up the RA STA */
2484 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002485
Johannes Berg97ffe752015-03-21 09:13:45 +01002486 if (tdls_peer) {
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002487 /* DA SA BSSID */
2488 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2489 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2490 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2491 hdrlen = 24;
2492 } else if (sdata->u.mgd.use_4addr &&
2493 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2494 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2495 IEEE80211_FCTL_TODS);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002496 /* RA TA DA SA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002497 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002498 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002499 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2500 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2501 hdrlen = 30;
2502 } else {
2503 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2504 /* BSSID SA DA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002505 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002506 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2507 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2508 hdrlen = 24;
2509 }
Johannes Berg55de9082012-07-26 17:24:39 +02002510 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002511 if (!chanctx_conf) {
2512 ret = -ENOTCONN;
2513 goto free;
2514 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002515 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002516 break;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002517 case NL80211_IFTYPE_OCB:
2518 /* DA SA BSSID */
2519 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2520 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2521 eth_broadcast_addr(hdr.addr3);
2522 hdrlen = 24;
2523 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002524 if (!chanctx_conf) {
2525 ret = -ENOTCONN;
2526 goto free;
2527 }
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002528 band = chanctx_conf->def.chan->band;
2529 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002530 case NL80211_IFTYPE_ADHOC:
Johannes Berge2ebc742007-07-27 15:43:22 +02002531 /* DA SA BSSID */
2532 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2533 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01002534 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002535 hdrlen = 24;
Johannes Berg55de9082012-07-26 17:24:39 +02002536 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002537 if (!chanctx_conf) {
2538 ret = -ENOTCONN;
2539 goto free;
2540 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002541 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002542 break;
2543 default:
Johannes Berg4c9451e2014-11-09 18:50:10 +02002544 ret = -EINVAL;
2545 goto free;
Johannes Berge2ebc742007-07-27 15:43:22 +02002546 }
2547
Johannes Berga729cff2011-11-06 14:13:34 +01002548 multicast = is_multicast_ether_addr(hdr.addr1);
Johannes Berge2ebc742007-07-27 15:43:22 +02002549
Johannes Berg97ffe752015-03-21 09:13:45 +01002550 /* sta is always NULL for mesh */
2551 if (sta) {
2552 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2553 wme_sta = sta->sta.wme;
2554 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2555 /* For mesh, the use of the QoS header is mandatory */
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002556 wme_sta = true;
Johannes Berge2ebc742007-07-27 15:43:22 +02002557 }
2558
Johannes Berg527871d2015-03-21 08:09:55 +01002559 /* receiver does QoS (which also means we do) use it */
2560 if (wme_sta) {
Harvey Harrison065e96052008-06-22 16:45:27 -07002561 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002562 hdrlen += 2;
2563 }
2564
2565 /*
Johannes Berg238814f2008-01-28 17:19:37 +01002566 * Drop unicast frames to unauthorised stations unless they are
2567 * EAPOL frames from the local station.
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002568 */
Johannes Berg55182e42011-10-12 17:28:21 +02002569 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002570 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
Sergey Ryazanova6ececf2013-08-30 01:35:09 +04002571 !multicast && !authorized &&
Johannes Berg55182e42011-10-12 17:28:21 +02002572 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002573 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002574#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002575 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
Johannes Berg4c9451e2014-11-09 18:50:10 +02002576 sdata->name, hdr.addr1);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002577#endif
2578
2579 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2580
Johannes Berg4c9451e2014-11-09 18:50:10 +02002581 ret = -EPERM;
2582 goto free;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002583 }
2584
Johannes Berga729cff2011-11-06 14:13:34 +01002585 if (unlikely(!multicast && skb->sk &&
2586 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002587 struct sk_buff *ack_skb = skb_clone_sk(skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002588
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002589 if (ack_skb) {
Johannes Berga729cff2011-11-06 14:13:34 +01002590 unsigned long flags;
Tejun Heo9475af62013-02-27 17:04:59 -08002591 int id;
Johannes Berga729cff2011-11-06 14:13:34 +01002592
2593 spin_lock_irqsave(&local->ack_status_lock, flags);
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002594 id = idr_alloc(&local->ack_status_frames, ack_skb,
Tejun Heo9475af62013-02-27 17:04:59 -08002595 1, 0x10000, GFP_ATOMIC);
Johannes Berga729cff2011-11-06 14:13:34 +01002596 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2597
Tejun Heo9475af62013-02-27 17:04:59 -08002598 if (id >= 0) {
Johannes Berga729cff2011-11-06 14:13:34 +01002599 info_id = id;
2600 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
Johannes Berga729cff2011-11-06 14:13:34 +01002601 } else {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002602 kfree_skb(ack_skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002603 }
Johannes Berga729cff2011-11-06 14:13:34 +01002604 }
2605 }
2606
Helmut Schaa7e244702010-12-02 18:44:09 +01002607 /*
2608 * If the skb is shared we need to obtain our own copy.
2609 */
2610 if (skb_shared(skb)) {
Johannes Berga729cff2011-11-06 14:13:34 +01002611 struct sk_buff *tmp_skb = skb;
2612
2613 /* can't happen -- skb is a clone if info_id != 0 */
2614 WARN_ON(info_id);
2615
Felix Fietkauf8a0a782010-12-18 19:30:50 +01002616 skb = skb_clone(skb, GFP_ATOMIC);
Helmut Schaa7e244702010-12-02 18:44:09 +01002617 kfree_skb(tmp_skb);
2618
Johannes Berg4c9451e2014-11-09 18:50:10 +02002619 if (!skb) {
2620 ret = -ENOMEM;
2621 goto free;
2622 }
Helmut Schaa7e244702010-12-02 18:44:09 +01002623 }
2624
Harvey Harrison065e96052008-06-22 16:45:27 -07002625 hdr.frame_control = fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002626 hdr.duration_id = 0;
2627 hdr.seq_ctrl = 0;
2628
2629 skip_header_bytes = ETH_HLEN;
2630 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2631 encaps_data = bridge_tunnel_header;
2632 encaps_len = sizeof(bridge_tunnel_header);
2633 skip_header_bytes -= 2;
Simon Hormane5c5d222013-03-28 13:38:25 +09002634 } else if (ethertype >= ETH_P_802_3_MIN) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002635 encaps_data = rfc1042_header;
2636 encaps_len = sizeof(rfc1042_header);
2637 skip_header_bytes -= 2;
2638 } else {
2639 encaps_data = NULL;
2640 encaps_len = 0;
2641 }
2642
Helmut Schaa7e244702010-12-02 18:44:09 +01002643 nh_pos = skb_network_header(skb) - skb->data;
2644 h_pos = skb_transport_header(skb) - skb->data;
2645
Johannes Berge2ebc742007-07-27 15:43:22 +02002646 skb_pull(skb, skip_header_bytes);
2647 nh_pos -= skip_header_bytes;
2648 h_pos -= skip_header_bytes;
2649
Johannes Berg23c07522008-05-29 10:38:53 +02002650 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002651
Johannes Berg23c07522008-05-29 10:38:53 +02002652 /*
2653 * So we need to modify the skb header and hence need a copy of
2654 * that. The head_need variable above doesn't, so far, include
2655 * the needed header space that we don't need right away. If we
2656 * can, then we don't reallocate right now but only after the
2657 * frame arrives at the master device (if it does...)
2658 *
2659 * If we cannot, however, then we will reallocate to include all
2660 * the ever needed space. Also, if we need to reallocate it anyway,
2661 * make it big enough for everything we may ever need.
2662 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002663
David S. Miller3a5be7d2008-06-18 01:19:51 -07002664 if (head_need > 0 || skb_cloned(skb)) {
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002665 head_need += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02002666 head_need += local->tx_headroom;
2667 head_need = max_t(int, 0, head_need);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002668 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2669 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg1c963be2012-11-07 14:02:30 +01002670 skb = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002671 return ERR_PTR(-ENOMEM);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002672 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002673 }
2674
2675 if (encaps_data) {
2676 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2677 nh_pos += encaps_len;
2678 h_pos += encaps_len;
2679 }
Johannes Bergc29b9b92007-09-14 11:10:24 -04002680
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002681#ifdef CONFIG_MAC80211_MESH
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002682 if (meshhdrlen > 0) {
2683 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2684 nh_pos += meshhdrlen;
2685 h_pos += meshhdrlen;
2686 }
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002687#endif
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002688
Harvey Harrison065e96052008-06-22 16:45:27 -07002689 if (ieee80211_is_data_qos(fc)) {
Johannes Bergc29b9b92007-09-14 11:10:24 -04002690 __le16 *qos_control;
2691
Weilong Chenf359d3f2013-12-18 15:44:16 +08002692 qos_control = (__le16 *) skb_push(skb, 2);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002693 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2694 /*
2695 * Maybe we could actually set some fields here, for now just
2696 * initialise to zero to indicate no special operation.
2697 */
2698 *qos_control = 0;
2699 } else
2700 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2701
Johannes Berge2ebc742007-07-27 15:43:22 +02002702 nh_pos += hdrlen;
2703 h_pos += hdrlen;
2704
Johannes Berge2ebc742007-07-27 15:43:22 +02002705 /* Update skb pointers to various headers since this modified frame
2706 * is going to go through Linux networking code that may potentially
2707 * need things like pointer to IP header. */
Zhang Shengjud57a5442016-03-03 01:16:56 +00002708 skb_reset_mac_header(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002709 skb_set_network_header(skb, nh_pos);
2710 skb_set_transport_header(skb, h_pos);
2711
Felix Fietkau489ee912010-12-18 19:30:48 +01002712 info = IEEE80211_SKB_CB(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002713 memset(info, 0, sizeof(*info));
2714
Johannes Berga729cff2011-11-06 14:13:34 +01002715 info->flags = info_flags;
2716 info->ack_frame_id = info_id;
Johannes Berg73c4e192014-11-09 18:50:09 +02002717 info->band = band;
Johannes Berga729cff2011-11-06 14:13:34 +01002718
Johannes Berg4c9451e2014-11-09 18:50:10 +02002719 return skb;
2720 free:
2721 kfree_skb(skb);
2722 return ERR_PTR(ret);
Johannes Berge2ebc742007-07-27 15:43:22 +02002723}
2724
Johannes Berg17c18bf2015-03-21 15:25:43 +01002725/*
2726 * fast-xmit overview
2727 *
2728 * The core idea of this fast-xmit is to remove per-packet checks by checking
2729 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2730 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2731 * much less work can be done per packet. For example, fragmentation must be
2732 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2733 * in the code here.
2734 *
2735 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2736 * header and other data to aid packet processing in ieee80211_xmit_fast().
2737 *
2738 * The most difficult part of this is that when any of these assumptions
2739 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2740 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2741 * since the per-packet code no longer checks the conditions. This is reflected
2742 * by the calls to these functions throughout the rest of the code, and must be
2743 * maintained if any of the TX path checks change.
2744 */
2745
2746void ieee80211_check_fast_xmit(struct sta_info *sta)
2747{
2748 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2749 struct ieee80211_local *local = sta->local;
2750 struct ieee80211_sub_if_data *sdata = sta->sdata;
2751 struct ieee80211_hdr *hdr = (void *)build.hdr;
2752 struct ieee80211_chanctx_conf *chanctx_conf;
2753 __le16 fc;
2754
Johannes Berg30686bf2015-06-02 21:39:54 +02002755 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002756 return;
2757
2758 /* Locking here protects both the pointer itself, and against concurrent
2759 * invocations winning data access races to, e.g., the key pointer that
2760 * is used.
2761 * Without it, the invocation of this function right after the key
2762 * pointer changes wouldn't be sufficient, as another CPU could access
2763 * the pointer, then stall, and then do the cache update after the CPU
2764 * that invalidated the key.
2765 * With the locking, such scenarios cannot happen as the check for the
2766 * key and the fast-tx assignment are done atomically, so the CPU that
2767 * modifies the key will either wait or other one will see the key
2768 * cleared/changed already.
2769 */
2770 spin_lock_bh(&sta->lock);
Johannes Berg30686bf2015-06-02 21:39:54 +02002771 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2772 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
Johannes Berg17c18bf2015-03-21 15:25:43 +01002773 sdata->vif.type == NL80211_IFTYPE_STATION)
2774 goto out;
2775
2776 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2777 goto out;
2778
2779 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2780 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
Felix Fietkauf7418bc2015-09-24 14:59:49 +02002781 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2782 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002783 goto out;
2784
2785 if (sdata->noack_map)
2786 goto out;
2787
2788 /* fast-xmit doesn't handle fragmentation at all */
Johannes Berg725b8122015-04-10 14:02:08 +02002789 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2790 !local->ops->set_frag_threshold)
Johannes Berg17c18bf2015-03-21 15:25:43 +01002791 goto out;
2792
2793 rcu_read_lock();
2794 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2795 if (!chanctx_conf) {
2796 rcu_read_unlock();
2797 goto out;
2798 }
2799 build.band = chanctx_conf->def.chan->band;
2800 rcu_read_unlock();
2801
2802 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2803
2804 switch (sdata->vif.type) {
Johannes Berg3ffd8842015-04-14 10:28:37 +02002805 case NL80211_IFTYPE_ADHOC:
2806 /* DA SA BSSID */
2807 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2808 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2809 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2810 build.hdr_len = 24;
2811 break;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002812 case NL80211_IFTYPE_STATION:
2813 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2814 /* DA SA BSSID */
2815 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2816 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2817 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2818 build.hdr_len = 24;
2819 break;
2820 }
2821
2822 if (sdata->u.mgd.use_4addr) {
2823 /* non-regular ethertype cannot use the fastpath */
2824 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2825 IEEE80211_FCTL_TODS);
2826 /* RA TA DA SA */
2827 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2828 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2829 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2830 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2831 build.hdr_len = 30;
2832 break;
2833 }
2834 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2835 /* BSSID SA DA */
2836 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2837 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2838 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2839 build.hdr_len = 24;
2840 break;
2841 case NL80211_IFTYPE_AP_VLAN:
2842 if (sdata->wdev.use_4addr) {
2843 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2844 IEEE80211_FCTL_TODS);
2845 /* RA TA DA SA */
2846 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2847 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2848 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2849 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2850 build.hdr_len = 30;
2851 break;
2852 }
2853 /* fall through */
2854 case NL80211_IFTYPE_AP:
2855 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2856 /* DA BSSID SA */
2857 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2858 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2859 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2860 build.hdr_len = 24;
2861 break;
2862 default:
2863 /* not handled on fast-xmit */
2864 goto out;
2865 }
2866
2867 if (sta->sta.wme) {
2868 build.hdr_len += 2;
2869 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2870 }
2871
2872 /* We store the key here so there's no point in using rcu_dereference()
2873 * but that's fine because the code that changes the pointers will call
2874 * this function after doing so. For a single CPU that would be enough,
2875 * for multiple see the comment above.
2876 */
2877 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2878 if (!build.key)
2879 build.key = rcu_access_pointer(sdata->default_unicast_key);
2880 if (build.key) {
Johannes Berge495c242015-04-10 14:03:17 +02002881 bool gen_iv, iv_spc, mmic;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002882
2883 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2884 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
Johannes Berge495c242015-04-10 14:03:17 +02002885 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002886
2887 /* don't handle software crypto */
2888 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2889 goto out;
2890
2891 switch (build.key->conf.cipher) {
2892 case WLAN_CIPHER_SUITE_CCMP:
2893 case WLAN_CIPHER_SUITE_CCMP_256:
2894 /* add fixed key ID */
2895 if (gen_iv) {
2896 (build.hdr + build.hdr_len)[3] =
2897 0x20 | (build.key->conf.keyidx << 6);
2898 build.pn_offs = build.hdr_len;
2899 }
2900 if (gen_iv || iv_spc)
2901 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2902 break;
2903 case WLAN_CIPHER_SUITE_GCMP:
2904 case WLAN_CIPHER_SUITE_GCMP_256:
2905 /* add fixed key ID */
2906 if (gen_iv) {
2907 (build.hdr + build.hdr_len)[3] =
2908 0x20 | (build.key->conf.keyidx << 6);
2909 build.pn_offs = build.hdr_len;
2910 }
2911 if (gen_iv || iv_spc)
2912 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2913 break;
Johannes Berge495c242015-04-10 14:03:17 +02002914 case WLAN_CIPHER_SUITE_TKIP:
2915 /* cannot handle MMIC or IV generation in xmit-fast */
2916 if (mmic || gen_iv)
2917 goto out;
2918 if (iv_spc)
2919 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2920 break;
2921 case WLAN_CIPHER_SUITE_WEP40:
2922 case WLAN_CIPHER_SUITE_WEP104:
2923 /* cannot handle IV generation in fast-xmit */
2924 if (gen_iv)
2925 goto out;
2926 if (iv_spc)
2927 build.hdr_len += IEEE80211_WEP_IV_LEN;
2928 break;
2929 case WLAN_CIPHER_SUITE_AES_CMAC:
2930 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2931 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2932 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2933 WARN(1,
2934 "management cipher suite 0x%x enabled for data\n",
2935 build.key->conf.cipher);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002936 goto out;
Johannes Berge495c242015-04-10 14:03:17 +02002937 default:
2938 /* we don't know how to generate IVs for this at all */
2939 if (WARN_ON(gen_iv))
2940 goto out;
2941 /* pure hardware keys are OK, of course */
2942 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2943 break;
2944 /* cipher scheme might require space allocation */
2945 if (iv_spc &&
2946 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2947 goto out;
2948 if (iv_spc)
2949 build.hdr_len += build.key->conf.iv_len;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002950 }
2951
2952 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2953 }
2954
2955 hdr->frame_control = fc;
2956
2957 memcpy(build.hdr + build.hdr_len,
2958 rfc1042_header, sizeof(rfc1042_header));
2959 build.hdr_len += sizeof(rfc1042_header);
2960
2961 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2962 /* if the kmemdup fails, continue w/o fast_tx */
2963 if (!fast_tx)
2964 goto out;
2965
2966 out:
2967 /* we might have raced against another call to this function */
2968 old = rcu_dereference_protected(sta->fast_tx,
2969 lockdep_is_held(&sta->lock));
2970 rcu_assign_pointer(sta->fast_tx, fast_tx);
2971 if (old)
2972 kfree_rcu(old, rcu_head);
2973 spin_unlock_bh(&sta->lock);
2974}
2975
2976void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2977{
2978 struct sta_info *sta;
2979
2980 rcu_read_lock();
2981 list_for_each_entry_rcu(sta, &local->sta_list, list)
2982 ieee80211_check_fast_xmit(sta);
2983 rcu_read_unlock();
2984}
2985
2986void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
2987{
2988 struct ieee80211_local *local = sdata->local;
2989 struct sta_info *sta;
2990
2991 rcu_read_lock();
2992
2993 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2994 if (sdata != sta->sdata &&
2995 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
2996 continue;
2997 ieee80211_check_fast_xmit(sta);
2998 }
2999
3000 rcu_read_unlock();
3001}
3002
3003void ieee80211_clear_fast_xmit(struct sta_info *sta)
3004{
3005 struct ieee80211_fast_tx *fast_tx;
3006
3007 spin_lock_bh(&sta->lock);
3008 fast_tx = rcu_dereference_protected(sta->fast_tx,
3009 lockdep_is_held(&sta->lock));
3010 RCU_INIT_POINTER(sta->fast_tx, NULL);
3011 spin_unlock_bh(&sta->lock);
3012
3013 if (fast_tx)
3014 kfree_rcu(fast_tx, rcu_head);
3015}
3016
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003017static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3018 struct sk_buff *skb, int headroom,
3019 int *subframe_len)
3020{
3021 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3022 int padding = (4 - amsdu_len) & 3;
3023
3024 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3025 I802_DEBUG_INC(local->tx_expand_skb_head);
3026
3027 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3028 wiphy_debug(local->hw.wiphy,
3029 "failed to reallocate TX buffer\n");
3030 return false;
3031 }
3032 }
3033
3034 if (padding) {
3035 *subframe_len += padding;
3036 memset(skb_put(skb, padding), 0, padding);
3037 }
3038
3039 return true;
3040}
3041
3042static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3043 struct ieee80211_fast_tx *fast_tx,
3044 struct sk_buff *skb)
3045{
3046 struct ieee80211_local *local = sdata->local;
3047 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3048 struct ieee80211_hdr *hdr;
3049 struct ethhdr amsdu_hdr;
3050 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3051 int subframe_len = skb->len - hdr_len;
3052 void *data;
3053 u8 *qc;
3054
3055 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3056 return false;
3057
3058 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3059 return true;
3060
3061 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(amsdu_hdr),
3062 &subframe_len))
3063 return false;
3064
3065 amsdu_hdr.h_proto = cpu_to_be16(subframe_len);
3066 memcpy(amsdu_hdr.h_source, skb->data + fast_tx->sa_offs, ETH_ALEN);
3067 memcpy(amsdu_hdr.h_dest, skb->data + fast_tx->da_offs, ETH_ALEN);
3068
3069 data = skb_push(skb, sizeof(amsdu_hdr));
3070 memmove(data, data + sizeof(amsdu_hdr), hdr_len);
3071 memcpy(data + hdr_len, &amsdu_hdr, sizeof(amsdu_hdr));
3072
3073 hdr = data;
3074 qc = ieee80211_get_qos_ctl(hdr);
3075 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3076
3077 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3078
3079 return true;
3080}
3081
3082static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3083 struct sta_info *sta,
3084 struct ieee80211_fast_tx *fast_tx,
3085 struct sk_buff *skb)
3086{
3087 struct ieee80211_local *local = sdata->local;
Michal Kaziorfa962b92016-05-19 10:37:49 +02003088 struct fq *fq = &local->fq;
3089 struct fq_tin *tin;
3090 struct fq_flow *flow;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003091 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3092 struct ieee80211_txq *txq = sta->sta.txq[tid];
3093 struct txq_info *txqi;
3094 struct sk_buff **frag_tail, *head;
3095 int subframe_len = skb->len - ETH_ALEN;
3096 u8 max_subframes = sta->sta.max_amsdu_subframes;
3097 int max_frags = local->hw.max_tx_fragments;
3098 int max_amsdu_len = sta->sta.max_amsdu_len;
3099 __be16 len;
3100 void *data;
3101 bool ret = false;
Michal Kaziorfa962b92016-05-19 10:37:49 +02003102 unsigned int orig_len;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003103 int n = 1, nfrags;
3104
3105 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3106 return false;
3107
3108 if (!txq)
3109 return false;
3110
3111 txqi = to_txq_info(txq);
3112 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3113 return false;
3114
3115 if (sta->sta.max_rc_amsdu_len)
3116 max_amsdu_len = min_t(int, max_amsdu_len,
3117 sta->sta.max_rc_amsdu_len);
3118
Michal Kaziorfa962b92016-05-19 10:37:49 +02003119 spin_lock_bh(&fq->lock);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003120
Michal Kaziorfa962b92016-05-19 10:37:49 +02003121 /* TODO: Ideally aggregation should be done on dequeue to remain
3122 * responsive to environment changes.
3123 */
3124
3125 tin = &txqi->tin;
3126 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3127 head = skb_peek_tail(&flow->queue);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003128 if (!head)
3129 goto out;
3130
Michal Kaziorfa962b92016-05-19 10:37:49 +02003131 orig_len = head->len;
3132
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003133 if (skb->len + head->len > max_amsdu_len)
3134 goto out;
3135
3136 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3137 goto out;
3138
3139 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3140 nfrags += 1 + skb_shinfo(head)->nr_frags;
3141 frag_tail = &skb_shinfo(head)->frag_list;
3142 while (*frag_tail) {
3143 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3144 frag_tail = &(*frag_tail)->next;
3145 n++;
3146 }
3147
3148 if (max_subframes && n > max_subframes)
3149 goto out;
3150
3151 if (max_frags && nfrags > max_frags)
3152 goto out;
3153
3154 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3155 &subframe_len))
3156 goto out;
3157
3158 ret = true;
3159 data = skb_push(skb, ETH_ALEN + 2);
3160 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3161
3162 data += 2 * ETH_ALEN;
3163 len = cpu_to_be16(subframe_len);
3164 memcpy(data, &len, 2);
3165 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3166
3167 head->len += skb->len;
3168 head->data_len += skb->len;
3169 *frag_tail = skb;
3170
Michal Kaziorfa962b92016-05-19 10:37:49 +02003171 flow->backlog += head->len - orig_len;
3172 tin->backlog_bytes += head->len - orig_len;
3173
3174 fq_recalc_backlog(fq, tin, flow);
3175
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003176out:
Michal Kaziorfa962b92016-05-19 10:37:49 +02003177 spin_unlock_bh(&fq->lock);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003178
3179 return ret;
3180}
3181
Johannes Berg17c18bf2015-03-21 15:25:43 +01003182static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3183 struct net_device *dev, struct sta_info *sta,
3184 struct ieee80211_fast_tx *fast_tx,
3185 struct sk_buff *skb)
3186{
3187 struct ieee80211_local *local = sdata->local;
3188 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3189 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3190 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3191 struct ethhdr eth;
3192 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3193 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3194 struct ieee80211_tx_data tx;
3195 ieee80211_tx_result r;
3196 struct tid_ampdu_tx *tid_tx = NULL;
3197 u8 tid = IEEE80211_NUM_TIDS;
3198
3199 /* control port protocol needs a lot of special handling */
3200 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3201 return false;
3202
3203 /* only RFC 1042 SNAP */
3204 if (ethertype < ETH_P_802_3_MIN)
3205 return false;
3206
3207 /* don't handle TX status request here either */
3208 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3209 return false;
3210
3211 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3212 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3213 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
Johannes Berg472be002015-06-09 16:45:08 +02003214 if (tid_tx) {
3215 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3216 return false;
3217 if (tid_tx->timeout)
3218 tid_tx->last_tx = jiffies;
3219 }
Johannes Berg17c18bf2015-03-21 15:25:43 +01003220 }
3221
3222 /* after this point (skb is modified) we cannot return false */
3223
3224 if (skb_shared(skb)) {
3225 struct sk_buff *tmp_skb = skb;
3226
3227 skb = skb_clone(skb, GFP_ATOMIC);
3228 kfree_skb(tmp_skb);
3229
3230 if (!skb)
3231 return true;
3232 }
3233
Johannes Berg5a490512015-04-22 17:10:38 +02003234 ieee80211_tx_stats(dev, skb->len + extra_head);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003235
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003236 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3237 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3238 return true;
3239
Johannes Berg17c18bf2015-03-21 15:25:43 +01003240 /* will not be crypto-handled beyond what we do here, so use false
3241 * as the may-encrypt argument for the resize to not account for
3242 * more room than we already have in 'extra_head'
3243 */
3244 if (unlikely(ieee80211_skb_resize(sdata, skb,
3245 max_t(int, extra_head + hw_headroom -
3246 skb_headroom(skb), 0),
3247 false))) {
3248 kfree_skb(skb);
3249 return true;
3250 }
3251
3252 memcpy(&eth, skb->data, ETH_HLEN - 2);
3253 hdr = (void *)skb_push(skb, extra_head);
3254 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3255 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3256 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3257
3258 memset(info, 0, sizeof(*info));
3259 info->band = fast_tx->band;
3260 info->control.vif = &sdata->vif;
3261 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3262 IEEE80211_TX_CTL_DONTFRAG |
3263 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
3264
3265 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3266 *ieee80211_get_qos_ctl(hdr) = tid;
Felix Fietkau50f36ae2015-09-24 14:59:48 +02003267 if (!sta->sta.txq[0])
3268 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003269 } else {
3270 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3271 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3272 sdata->sequence_number += 0x10;
3273 }
3274
Johannes Bergccc6bb92015-06-23 11:50:52 +02003275 if (skb_shinfo(skb)->gso_size)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003276 sta->tx_stats.msdu[tid] +=
Johannes Bergccc6bb92015-06-23 11:50:52 +02003277 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3278 else
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003279 sta->tx_stats.msdu[tid]++;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003280
3281 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3282
3283 __skb_queue_head_init(&tx.skbs);
3284
3285 tx.flags = IEEE80211_TX_UNICAST;
3286 tx.local = local;
3287 tx.sdata = sdata;
3288 tx.sta = sta;
3289 tx.key = fast_tx->key;
3290
3291 if (fast_tx->key)
3292 info->control.hw_key = &fast_tx->key->conf;
3293
Johannes Berg30686bf2015-06-02 21:39:54 +02003294 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
Johannes Berg17c18bf2015-03-21 15:25:43 +01003295 tx.skb = skb;
3296 r = ieee80211_tx_h_rate_ctrl(&tx);
3297 skb = tx.skb;
3298 tx.skb = NULL;
3299
3300 if (r != TX_CONTINUE) {
3301 if (r != TX_QUEUED)
3302 kfree_skb(skb);
3303 return true;
3304 }
3305 }
3306
3307 /* statistics normally done by ieee80211_tx_h_stats (but that
3308 * has to consider fragmentation, so is more complex)
3309 */
Johannes Berge5a9f8d2015-10-16 17:54:47 +02003310 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3311 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003312
3313 if (fast_tx->pn_offs) {
3314 u64 pn;
3315 u8 *crypto_hdr = skb->data + fast_tx->pn_offs;
3316
3317 switch (fast_tx->key->conf.cipher) {
3318 case WLAN_CIPHER_SUITE_CCMP:
3319 case WLAN_CIPHER_SUITE_CCMP_256:
Johannes Berg17c18bf2015-03-21 15:25:43 +01003320 case WLAN_CIPHER_SUITE_GCMP:
3321 case WLAN_CIPHER_SUITE_GCMP_256:
Johannes Bergdb388a52015-06-01 15:36:51 +02003322 pn = atomic64_inc_return(&fast_tx->key->conf.tx_pn);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003323 crypto_hdr[0] = pn;
3324 crypto_hdr[1] = pn >> 8;
3325 crypto_hdr[4] = pn >> 16;
3326 crypto_hdr[5] = pn >> 24;
3327 crypto_hdr[6] = pn >> 32;
3328 crypto_hdr[7] = pn >> 40;
3329 break;
3330 }
3331 }
3332
3333 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3334 sdata = container_of(sdata->bss,
3335 struct ieee80211_sub_if_data, u.ap);
3336
3337 __skb_queue_tail(&tx.skbs, skb);
3338 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3339 return true;
3340}
3341
Johannes Berg4c9451e2014-11-09 18:50:10 +02003342void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3343 struct net_device *dev,
3344 u32 info_flags)
3345{
3346 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg97ffe752015-03-21 09:13:45 +01003347 struct sta_info *sta;
Johannes Berg80616c02015-04-14 14:50:41 +02003348 struct sk_buff *next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003349
3350 if (unlikely(skb->len < ETH_HLEN)) {
3351 kfree_skb(skb);
3352 return;
3353 }
3354
3355 rcu_read_lock();
3356
Johannes Berg2d981fd2015-04-10 14:10:10 +02003357 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3358 goto out_free;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003359
Johannes Berg17c18bf2015-03-21 15:25:43 +01003360 if (!IS_ERR_OR_NULL(sta)) {
3361 struct ieee80211_fast_tx *fast_tx;
3362
3363 fast_tx = rcu_dereference(sta->fast_tx);
3364
3365 if (fast_tx &&
3366 ieee80211_xmit_fast(sdata, dev, sta, fast_tx, skb))
3367 goto out;
3368 }
3369
Johannes Berg80616c02015-04-14 14:50:41 +02003370 if (skb_is_gso(skb)) {
3371 struct sk_buff *segs;
Johannes Berg680a0da2015-04-13 16:58:25 +02003372
Johannes Berg80616c02015-04-14 14:50:41 +02003373 segs = skb_gso_segment(skb, 0);
3374 if (IS_ERR(segs)) {
Johannes Berg2d981fd2015-04-10 14:10:10 +02003375 goto out_free;
Johannes Berg80616c02015-04-14 14:50:41 +02003376 } else if (segs) {
3377 consume_skb(skb);
3378 skb = segs;
3379 }
3380 } else {
3381 /* we cannot process non-linear frames on this path */
3382 if (skb_linearize(skb)) {
3383 kfree_skb(skb);
3384 goto out;
3385 }
3386
3387 /* the frame could be fragmented, software-encrypted, and other
3388 * things so we cannot really handle checksum offload with it -
3389 * fix it up in software before we handle anything else.
3390 */
3391 if (skb->ip_summed == CHECKSUM_PARTIAL) {
Johannes Bergf603f1f2015-05-05 15:25:33 +02003392 skb_set_transport_header(skb,
3393 skb_checksum_start_offset(skb));
Johannes Berg80616c02015-04-14 14:50:41 +02003394 if (skb_checksum_help(skb))
3395 goto out_free;
3396 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02003397 }
3398
Johannes Berg80616c02015-04-14 14:50:41 +02003399 next = skb;
3400 while (next) {
3401 skb = next;
3402 next = skb->next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003403
Johannes Berg80616c02015-04-14 14:50:41 +02003404 skb->prev = NULL;
3405 skb->next = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003406
Johannes Berg80616c02015-04-14 14:50:41 +02003407 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3408 if (IS_ERR(skb))
3409 goto out;
3410
Johannes Berg5a490512015-04-22 17:10:38 +02003411 ieee80211_tx_stats(dev, skb->len);
Johannes Berg80616c02015-04-14 14:50:41 +02003412
3413 ieee80211_xmit(sdata, sta, skb);
3414 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02003415 goto out;
3416 out_free:
3417 kfree_skb(skb);
Johannes Berg4c9451e2014-11-09 18:50:10 +02003418 out:
3419 rcu_read_unlock();
3420}
3421
3422/**
3423 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3424 * @skb: packet to be sent
3425 * @dev: incoming interface
3426 *
3427 * On failure skb will be freed.
3428 */
Liad Kaufman24d342c2014-11-09 18:50:07 +02003429netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3430 struct net_device *dev)
3431{
3432 __ieee80211_subif_start_xmit(skb, dev, 0);
3433 return NETDEV_TX_OK;
3434}
Johannes Berge2ebc742007-07-27 15:43:22 +02003435
Johannes Berg7528ec52014-11-09 18:50:11 +02003436struct sk_buff *
3437ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3438 struct sk_buff *skb, u32 info_flags)
3439{
3440 struct ieee80211_hdr *hdr;
3441 struct ieee80211_tx_data tx = {
3442 .local = sdata->local,
3443 .sdata = sdata,
3444 };
Johannes Berg97ffe752015-03-21 09:13:45 +01003445 struct sta_info *sta;
Johannes Berg7528ec52014-11-09 18:50:11 +02003446
3447 rcu_read_lock();
3448
Johannes Berg97ffe752015-03-21 09:13:45 +01003449 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3450 kfree_skb(skb);
3451 skb = ERR_PTR(-EINVAL);
3452 goto out;
3453 }
3454
3455 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
Johannes Berg7528ec52014-11-09 18:50:11 +02003456 if (IS_ERR(skb))
3457 goto out;
3458
3459 hdr = (void *)skb->data;
3460 tx.sta = sta_info_get(sdata, hdr->addr1);
3461 tx.skb = skb;
3462
3463 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3464 rcu_read_unlock();
3465 kfree_skb(skb);
3466 return ERR_PTR(-EINVAL);
3467 }
3468
3469out:
3470 rcu_read_unlock();
3471 return skb;
3472}
3473
Johannes Berge2530082008-05-17 00:57:14 +02003474/*
3475 * ieee80211_clear_tx_pending may not be called in a context where
3476 * it is possible that it packets could come in again.
3477 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003478void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3479{
Felix Fietkau1f98ab72012-11-10 03:44:14 +01003480 struct sk_buff *skb;
Johannes Berg2de8e0d2009-03-23 17:28:35 +01003481 int i;
Johannes Berge2ebc742007-07-27 15:43:22 +02003482
Felix Fietkau1f98ab72012-11-10 03:44:14 +01003483 for (i = 0; i < local->hw.queues; i++) {
3484 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3485 ieee80211_free_txskb(&local->hw, skb);
3486 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003487}
3488
Johannes Berg7bb45682011-02-24 14:42:06 +01003489/*
3490 * Returns false if the frame couldn't be transmitted but was queued instead,
3491 * which in this case means re-queued -- take as an indication to stop sending
3492 * more pending frames.
3493 */
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003494static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3495 struct sk_buff *skb)
3496{
3497 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3498 struct ieee80211_sub_if_data *sdata;
3499 struct sta_info *sta;
3500 struct ieee80211_hdr *hdr;
Johannes Berg7bb45682011-02-24 14:42:06 +01003501 bool result;
Johannes Berg55de9082012-07-26 17:24:39 +02003502 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003503
Johannes Berg5061b0c2009-07-14 00:33:34 +02003504 sdata = vif_to_sdata(info->control.vif);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003505
3506 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
Johannes Berg55de9082012-07-26 17:24:39 +02003507 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3508 if (unlikely(!chanctx_conf)) {
3509 dev_kfree_skb(skb);
3510 return true;
3511 }
Johannes Berg73c4e192014-11-09 18:50:09 +02003512 info->band = chanctx_conf->def.chan->band;
Johannes Berg7c107702015-03-20 14:18:27 +01003513 result = ieee80211_tx(sdata, NULL, skb, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003514 } else {
Johannes Berg252b86c2011-11-16 15:28:55 +01003515 struct sk_buff_head skbs;
3516
3517 __skb_queue_head_init(&skbs);
3518 __skb_queue_tail(&skbs, skb);
3519
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003520 hdr = (struct ieee80211_hdr *)skb->data;
Johannes Bergabe60632009-11-25 17:46:18 +01003521 sta = sta_info_get(sdata, hdr->addr1);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003522
Johannes Berg74e4dbf2011-11-16 15:28:57 +01003523 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003524 }
3525
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003526 return result;
3527}
3528
Johannes Berge2530082008-05-17 00:57:14 +02003529/*
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003530 * Transmit all pending packets. Called from tasklet.
Johannes Berge2530082008-05-17 00:57:14 +02003531 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003532void ieee80211_tx_pending(unsigned long data)
3533{
3534 struct ieee80211_local *local = (struct ieee80211_local *)data;
Johannes Berg2a577d92009-03-23 17:28:37 +01003535 unsigned long flags;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003536 int i;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003537 bool txok;
Johannes Berge2ebc742007-07-27 15:43:22 +02003538
Johannes Bergf0e72852009-03-23 17:28:36 +01003539 rcu_read_lock();
Johannes Berg2a577d92009-03-23 17:28:37 +01003540
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003541 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg176be722009-03-12 23:49:28 +01003542 for (i = 0; i < local->hw.queues; i++) {
Johannes Berg2a577d92009-03-23 17:28:37 +01003543 /*
3544 * If queue is stopped by something other than due to pending
3545 * frames, or we have no pending frames, proceed to next queue.
3546 */
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003547 if (local->queue_stop_reasons[i] ||
Johannes Berg2a577d92009-03-23 17:28:37 +01003548 skb_queue_empty(&local->pending[i]))
Johannes Berge2ebc742007-07-27 15:43:22 +02003549 continue;
Johannes Berge2530082008-05-17 00:57:14 +02003550
Johannes Berg2a577d92009-03-23 17:28:37 +01003551 while (!skb_queue_empty(&local->pending[i])) {
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003552 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003553 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003554
Johannes Berga7bc3762009-07-27 10:33:31 +02003555 if (WARN_ON(!info->control.vif)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02003556 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +02003557 continue;
3558 }
3559
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003560 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3561 flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003562
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003563 txok = ieee80211_tx_pending_skb(local, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003564 spin_lock_irqsave(&local->queue_stop_reason_lock,
3565 flags);
3566 if (!txok)
Johannes Berg2a577d92009-03-23 17:28:37 +01003567 break;
Johannes Berge2ebc742007-07-27 15:43:22 +02003568 }
Johannes Berg7236fe22010-03-22 13:42:43 -07003569
3570 if (skb_queue_empty(&local->pending[i]))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003571 ieee80211_propagate_queue_wake(local, i);
Johannes Berge2ebc742007-07-27 15:43:22 +02003572 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003573 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003574
Johannes Bergf0e72852009-03-23 17:28:36 +01003575 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003576}
3577
3578/* functions for drivers to get certain frames */
3579
Marco Porscheac70c12013-01-07 16:04:50 +01003580static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003581 struct ps_data *ps, struct sk_buff *skb,
3582 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02003583{
3584 u8 *pos, *tim;
3585 int aid0 = 0;
3586 int i, have_bits = 0, n1, n2;
3587
3588 /* Generate bitmap for TIM only if there are any STAs in power save
3589 * mode. */
Marco Porschd012a602012-10-10 12:39:50 -07003590 if (atomic_read(&ps->num_sta_ps) > 0)
Johannes Berge2ebc742007-07-27 15:43:22 +02003591 /* in the hope that this is faster than
3592 * checking byte-for-byte */
Weilong Chenf359d3f2013-12-18 15:44:16 +08003593 have_bits = !bitmap_empty((unsigned long *)ps->tim,
Johannes Berge2ebc742007-07-27 15:43:22 +02003594 IEEE80211_MAX_AID+1);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003595 if (!is_template) {
3596 if (ps->dtim_count == 0)
3597 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3598 else
3599 ps->dtim_count--;
3600 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003601
3602 tim = pos = (u8 *) skb_put(skb, 6);
3603 *pos++ = WLAN_EID_TIM;
3604 *pos++ = 4;
Marco Porschd012a602012-10-10 12:39:50 -07003605 *pos++ = ps->dtim_count;
Johannes Berg88600202012-02-13 15:17:18 +01003606 *pos++ = sdata->vif.bss_conf.dtim_period;
Johannes Berge2ebc742007-07-27 15:43:22 +02003607
Marco Porschd012a602012-10-10 12:39:50 -07003608 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
Johannes Berge2ebc742007-07-27 15:43:22 +02003609 aid0 = 1;
3610
Marco Porschd012a602012-10-10 12:39:50 -07003611 ps->dtim_bc_mc = aid0 == 1;
Christian Lamparter512119b2011-01-31 20:48:44 +02003612
Johannes Berge2ebc742007-07-27 15:43:22 +02003613 if (have_bits) {
3614 /* Find largest even number N1 so that bits numbered 1 through
3615 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3616 * (N2 + 1) x 8 through 2007 are 0. */
3617 n1 = 0;
3618 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
Marco Porschd012a602012-10-10 12:39:50 -07003619 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003620 n1 = i & 0xfe;
3621 break;
3622 }
3623 }
3624 n2 = n1;
3625 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
Marco Porschd012a602012-10-10 12:39:50 -07003626 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003627 n2 = i;
3628 break;
3629 }
3630 }
3631
3632 /* Bitmap control */
3633 *pos++ = n1 | aid0;
3634 /* Part Virt Bitmap */
Eliad Peller5220da32011-11-24 16:50:00 +02003635 skb_put(skb, n2 - n1);
Marco Porschd012a602012-10-10 12:39:50 -07003636 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
Johannes Berge2ebc742007-07-27 15:43:22 +02003637
3638 tim[1] = n2 - n1 + 4;
Johannes Berge2ebc742007-07-27 15:43:22 +02003639 } else {
3640 *pos++ = aid0; /* Bitmap control */
3641 *pos++ = 0; /* Part Virt Bitmap */
3642 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003643}
3644
Marco Porscheac70c12013-01-07 16:04:50 +01003645static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003646 struct ps_data *ps, struct sk_buff *skb,
3647 bool is_template)
Marco Porscheac70c12013-01-07 16:04:50 +01003648{
3649 struct ieee80211_local *local = sdata->local;
3650
3651 /*
3652 * Not very nice, but we want to allow the driver to call
3653 * ieee80211_beacon_get() as a response to the set_tim()
3654 * callback. That, however, is already invoked under the
3655 * sta_lock to guarantee consistent and race-free update
3656 * of the tim bitmap in mac80211 and the driver.
3657 */
3658 if (local->tim_in_locked_section) {
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003659 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Marco Porscheac70c12013-01-07 16:04:50 +01003660 } else {
Johannes Berg1b917312013-02-22 12:55:01 +01003661 spin_lock_bh(&local->tim_lock);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003662 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Johannes Berg1b917312013-02-22 12:55:01 +01003663 spin_unlock_bh(&local->tim_lock);
Marco Porscheac70c12013-01-07 16:04:50 +01003664 }
3665
3666 return 0;
3667}
3668
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003669static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3670 struct beacon_data *beacon)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003671{
3672 struct probe_resp *resp;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003673 u8 *beacon_data;
3674 size_t beacon_data_len;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003675 int i;
Michal Kazioraf296bd2014-06-05 14:21:36 +02003676 u8 count = beacon->csa_current_counter;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003677
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003678 switch (sdata->vif.type) {
3679 case NL80211_IFTYPE_AP:
3680 beacon_data = beacon->tail;
3681 beacon_data_len = beacon->tail_len;
3682 break;
3683 case NL80211_IFTYPE_ADHOC:
3684 beacon_data = beacon->head;
3685 beacon_data_len = beacon->head_len;
3686 break;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003687 case NL80211_IFTYPE_MESH_POINT:
3688 beacon_data = beacon->head;
3689 beacon_data_len = beacon->head_len;
3690 break;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003691 default:
3692 return;
3693 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003694
Michal Kazioraf296bd2014-06-05 14:21:36 +02003695 rcu_read_lock();
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003696 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02003697 resp = rcu_dereference(sdata->u.ap.probe_resp);
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003698
Michal Kazioraf296bd2014-06-05 14:21:36 +02003699 if (beacon->csa_counter_offsets[i]) {
3700 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3701 beacon_data_len)) {
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003702 rcu_read_unlock();
3703 return;
3704 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02003705
3706 beacon_data[beacon->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003707 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02003708
3709 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3710 resp->data[resp->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003711 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02003712 rcu_read_unlock();
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003713}
3714
Wojciech Dubowike996ec22015-06-10 13:06:53 +02003715static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3716{
3717 beacon->csa_current_counter--;
3718
3719 /* the counter should never reach 0 */
3720 WARN_ON_ONCE(!beacon->csa_current_counter);
3721
3722 return beacon->csa_current_counter;
3723}
3724
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003725u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3726{
3727 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003728 struct beacon_data *beacon = NULL;
3729 u8 count = 0;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003730
Michal Kazioraf296bd2014-06-05 14:21:36 +02003731 rcu_read_lock();
3732
3733 if (sdata->vif.type == NL80211_IFTYPE_AP)
3734 beacon = rcu_dereference(sdata->u.ap.beacon);
3735 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3736 beacon = rcu_dereference(sdata->u.ibss.presp);
3737 else if (ieee80211_vif_is_mesh(&sdata->vif))
3738 beacon = rcu_dereference(sdata->u.mesh.beacon);
3739
3740 if (!beacon)
3741 goto unlock;
3742
Wojciech Dubowike996ec22015-06-10 13:06:53 +02003743 count = __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003744
Michal Kazioraf296bd2014-06-05 14:21:36 +02003745unlock:
3746 rcu_read_unlock();
3747 return count;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003748}
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003749EXPORT_SYMBOL(ieee80211_csa_update_counter);
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003750
3751bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
3752{
3753 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3754 struct beacon_data *beacon = NULL;
3755 u8 *beacon_data;
3756 size_t beacon_data_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003757 int ret = false;
3758
3759 if (!ieee80211_sdata_running(sdata))
3760 return false;
3761
3762 rcu_read_lock();
3763 if (vif->type == NL80211_IFTYPE_AP) {
3764 struct ieee80211_if_ap *ap = &sdata->u.ap;
3765
3766 beacon = rcu_dereference(ap->beacon);
3767 if (WARN_ON(!beacon || !beacon->tail))
3768 goto out;
3769 beacon_data = beacon->tail;
3770 beacon_data_len = beacon->tail_len;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003771 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
3772 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3773
3774 beacon = rcu_dereference(ifibss->presp);
3775 if (!beacon)
3776 goto out;
3777
3778 beacon_data = beacon->head;
3779 beacon_data_len = beacon->head_len;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003780 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
3781 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3782
3783 beacon = rcu_dereference(ifmsh->beacon);
3784 if (!beacon)
3785 goto out;
3786
3787 beacon_data = beacon->head;
3788 beacon_data_len = beacon->head_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003789 } else {
3790 WARN_ON(1);
3791 goto out;
3792 }
3793
Michal Kazior10d78f22014-06-05 14:21:37 +02003794 if (!beacon->csa_counter_offsets[0])
3795 goto out;
3796
Michal Kazioraf296bd2014-06-05 14:21:36 +02003797 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003798 goto out;
3799
Michal Kazioraf296bd2014-06-05 14:21:36 +02003800 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003801 ret = true;
3802 out:
3803 rcu_read_unlock();
3804
3805 return ret;
3806}
3807EXPORT_SYMBOL(ieee80211_csa_is_complete);
3808
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003809static struct sk_buff *
3810__ieee80211_beacon_get(struct ieee80211_hw *hw,
3811 struct ieee80211_vif *vif,
3812 struct ieee80211_mutable_offsets *offs,
3813 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02003814{
3815 struct ieee80211_local *local = hw_to_local(hw);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003816 struct beacon_data *beacon = NULL;
Johannes Berg9d139c82008-07-09 14:40:37 +02003817 struct sk_buff *skb = NULL;
Johannes Berge039fa42008-05-15 12:55:29 +02003818 struct ieee80211_tx_info *info;
Johannes Berge2ebc742007-07-27 15:43:22 +02003819 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg57fbcce2016-04-12 15:56:15 +02003820 enum nl80211_band band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003821 struct ieee80211_tx_rate_control txrc;
Johannes Berg55de9082012-07-26 17:24:39 +02003822 struct ieee80211_chanctx_conf *chanctx_conf;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003823 int csa_off_base = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01003824
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003825 rcu_read_lock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003826
Johannes Berg32bfd352007-12-19 01:31:26 +01003827 sdata = vif_to_sdata(vif);
Johannes Berg55de9082012-07-26 17:24:39 +02003828 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berge2ebc742007-07-27 15:43:22 +02003829
Johannes Berg55de9082012-07-26 17:24:39 +02003830 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
Felix Fietkaueb3e5542011-01-24 19:28:49 +01003831 goto out;
3832
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003833 if (offs)
3834 memset(offs, 0, sizeof(*offs));
Johannes Bergeddcbb92009-10-29 08:30:35 +01003835
Johannes Berg05c914f2008-09-11 00:01:58 +02003836 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Marco Porschd012a602012-10-10 12:39:50 -07003837 struct ieee80211_if_ap *ap = &sdata->u.ap;
Marco Porschd012a602012-10-10 12:39:50 -07003838
Michal Kazioraf296bd2014-06-05 14:21:36 +02003839 beacon = rcu_dereference(ap->beacon);
Dan Carpenter3ad97fb2011-02-07 22:03:35 +03003840 if (beacon) {
Michal Kazior10d78f22014-06-05 14:21:37 +02003841 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003842 if (!is_template)
Wojciech Dubowike996ec22015-06-10 13:06:53 +02003843 __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003844
3845 ieee80211_set_csa(sdata, beacon);
3846 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003847
Johannes Berg902acc72008-02-23 15:17:19 +01003848 /*
3849 * headroom, head length,
3850 * tail length and maximum TIM length
3851 */
3852 skb = dev_alloc_skb(local->tx_headroom +
3853 beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01003854 beacon->tail_len + 256 +
3855 local->hw.extra_beacon_tailroom);
Johannes Berg902acc72008-02-23 15:17:19 +01003856 if (!skb)
3857 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003858
Johannes Berg902acc72008-02-23 15:17:19 +01003859 skb_reserve(skb, local->tx_headroom);
3860 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3861 beacon->head_len);
3862
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003863 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
3864 is_template);
Johannes Berg902acc72008-02-23 15:17:19 +01003865
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003866 if (offs) {
3867 offs->tim_offset = beacon->head_len;
3868 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003869
3870 /* for AP the csa offsets are from tail */
3871 csa_off_base = skb->len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003872 }
Johannes Bergeddcbb92009-10-29 08:30:35 +01003873
Johannes Berg902acc72008-02-23 15:17:19 +01003874 if (beacon->tail)
3875 memcpy(skb_put(skb, beacon->tail_len),
3876 beacon->tail, beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02003877 } else
3878 goto out;
Johannes Berg05c914f2008-09-11 00:01:58 +02003879 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg46900292009-02-15 12:44:28 +01003880 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
Johannes Berg9d139c82008-07-09 14:40:37 +02003881 struct ieee80211_hdr *hdr;
Johannes Berg902acc72008-02-23 15:17:19 +01003882
Michal Kazioraf296bd2014-06-05 14:21:36 +02003883 beacon = rcu_dereference(ifibss->presp);
3884 if (!beacon)
Johannes Berg9d139c82008-07-09 14:40:37 +02003885 goto out;
3886
Michal Kazior10d78f22014-06-05 14:21:37 +02003887 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003888 if (!is_template)
Wojciech Dubowike996ec22015-06-10 13:06:53 +02003889 __ieee80211_csa_update_counter(beacon);
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003890
Michal Kazioraf296bd2014-06-05 14:21:36 +02003891 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003892 }
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003893
Michal Kazioraf296bd2014-06-05 14:21:36 +02003894 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01003895 local->hw.extra_beacon_tailroom);
Johannes Berg9d139c82008-07-09 14:40:37 +02003896 if (!skb)
3897 goto out;
Johannes Bergc3ffeab2013-03-07 20:54:29 +01003898 skb_reserve(skb, local->tx_headroom);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003899 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3900 beacon->head_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02003901
3902 hdr = (struct ieee80211_hdr *) skb->data;
Harvey Harrisone7827a72008-07-15 18:44:13 -07003903 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3904 IEEE80211_STYPE_BEACON);
Johannes Berg902acc72008-02-23 15:17:19 +01003905 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
Javier Cardonadbf498f2012-03-31 11:31:32 -07003906 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Johannes Berg472dbc42008-09-11 00:01:49 +02003907
Michal Kazioraf296bd2014-06-05 14:21:36 +02003908 beacon = rcu_dereference(ifmsh->beacon);
3909 if (!beacon)
Johannes Bergac1bd842011-01-18 13:45:32 +01003910 goto out;
Johannes Bergac1bd842011-01-18 13:45:32 +01003911
Michal Kazior10d78f22014-06-05 14:21:37 +02003912 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003913 if (!is_template)
3914 /* TODO: For mesh csa_counter is in TU, so
3915 * decrementing it by one isn't correct, but
3916 * for now we leave it consistent with overall
3917 * mac80211's behavior.
3918 */
Wojciech Dubowike996ec22015-06-10 13:06:53 +02003919 __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003920
Michal Kazioraf296bd2014-06-05 14:21:36 +02003921 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003922 }
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003923
Javier Cardonadbf498f2012-03-31 11:31:32 -07003924 if (ifmsh->sync_ops)
Michal Kazioraf296bd2014-06-05 14:21:36 +02003925 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
Javier Cardonadbf498f2012-03-31 11:31:32 -07003926
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -07003927 skb = dev_alloc_skb(local->tx_headroom +
Michal Kazioraf296bd2014-06-05 14:21:36 +02003928 beacon->head_len +
Marco Porsch3f52b7e2013-01-30 18:14:08 +01003929 256 + /* TIM IE */
Michal Kazioraf296bd2014-06-05 14:21:36 +02003930 beacon->tail_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01003931 local->hw.extra_beacon_tailroom);
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01003932 if (!skb)
3933 goto out;
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08003934 skb_reserve(skb, local->tx_headroom);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003935 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3936 beacon->head_len);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003937 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
3938
3939 if (offs) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02003940 offs->tim_offset = beacon->head_len;
3941 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003942 }
3943
Michal Kazioraf296bd2014-06-05 14:21:36 +02003944 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
3945 beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02003946 } else {
3947 WARN_ON(1);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003948 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02003949 }
3950
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003951 /* CSA offsets */
Michal Kazioraf296bd2014-06-05 14:21:36 +02003952 if (offs && beacon) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003953 int i;
3954
3955 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02003956 u16 csa_off = beacon->csa_counter_offsets[i];
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003957
3958 if (!csa_off)
3959 continue;
3960
3961 offs->csa_counter_offs[i] = csa_off_base + csa_off;
3962 }
3963 }
3964
Johannes Berg4bf88532012-11-09 11:39:59 +01003965 band = chanctx_conf->def.chan->band;
Johannes Berg55de9082012-07-26 17:24:39 +02003966
Johannes Berge039fa42008-05-15 12:55:29 +02003967 info = IEEE80211_SKB_CB(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02003968
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003969 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003970 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Berge039fa42008-05-15 12:55:29 +02003971 info->band = band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003972
3973 memset(&txrc, 0, sizeof(txrc));
3974 txrc.hw = hw;
Johannes Berge31583c2012-07-26 14:07:46 +02003975 txrc.sband = local->hw.wiphy->bands[band];
Jouni Malinene00cfce2009-12-29 12:59:19 +02003976 txrc.bss_conf = &sdata->vif.bss_conf;
3977 txrc.skb = skb;
3978 txrc.reported_rate.idx = -1;
Jouni Malinen37eb0b12010-01-06 13:09:08 +02003979 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
Johannes Berge31583c2012-07-26 14:07:46 +02003980 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
Jouni Malinen37eb0b12010-01-06 13:09:08 +02003981 txrc.max_rate_idx = -1;
3982 else
3983 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
Felix Fietkau8f0729b2010-11-11 15:07:23 +01003984 txrc.bss = true;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003985 rate_control_get_rate(sdata, NULL, &txrc);
Johannes Berge039fa42008-05-15 12:55:29 +02003986
3987 info->control.vif = vif;
Johannes Bergf591fa52008-07-10 11:21:26 +02003988
John W. Linvillea472e712010-05-06 14:45:17 -04003989 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
3990 IEEE80211_TX_CTL_ASSIGN_SEQ |
3991 IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge6a98542008-10-21 12:40:02 +02003992 out:
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003993 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003994 return skb;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003995
3996}
3997
3998struct sk_buff *
3999ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4000 struct ieee80211_vif *vif,
4001 struct ieee80211_mutable_offsets *offs)
4002{
4003 return __ieee80211_beacon_get(hw, vif, offs, true);
4004}
4005EXPORT_SYMBOL(ieee80211_beacon_get_template);
4006
4007struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4008 struct ieee80211_vif *vif,
4009 u16 *tim_offset, u16 *tim_length)
4010{
4011 struct ieee80211_mutable_offsets offs = {};
4012 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
Helmut Schaa35afa582015-09-09 09:46:32 +02004013 struct sk_buff *copy;
4014 struct ieee80211_supported_band *sband;
4015 int shift;
4016
4017 if (!bcn)
4018 return bcn;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004019
4020 if (tim_offset)
4021 *tim_offset = offs.tim_offset;
4022
4023 if (tim_length)
4024 *tim_length = offs.tim_length;
4025
Helmut Schaa35afa582015-09-09 09:46:32 +02004026 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4027 !hw_to_local(hw)->monitors)
4028 return bcn;
4029
4030 /* send a copy to monitor interfaces */
4031 copy = skb_copy(bcn, GFP_ATOMIC);
4032 if (!copy)
4033 return bcn;
4034
4035 shift = ieee80211_vif_get_shift(vif);
4036 sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
4037 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4038
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004039 return bcn;
Johannes Berge2ebc742007-07-27 15:43:22 +02004040}
Johannes Bergeddcbb92009-10-29 08:30:35 +01004041EXPORT_SYMBOL(ieee80211_beacon_get_tim);
Johannes Berge2ebc742007-07-27 15:43:22 +02004042
Arik Nemtsov02945822011-11-10 11:28:57 +02004043struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4044 struct ieee80211_vif *vif)
4045{
4046 struct ieee80211_if_ap *ap = NULL;
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004047 struct sk_buff *skb = NULL;
4048 struct probe_resp *presp = NULL;
Arik Nemtsov02945822011-11-10 11:28:57 +02004049 struct ieee80211_hdr *hdr;
4050 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4051
4052 if (sdata->vif.type != NL80211_IFTYPE_AP)
4053 return NULL;
4054
4055 rcu_read_lock();
4056
4057 ap = &sdata->u.ap;
4058 presp = rcu_dereference(ap->probe_resp);
4059 if (!presp)
4060 goto out;
4061
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004062 skb = dev_alloc_skb(presp->len);
Arik Nemtsov02945822011-11-10 11:28:57 +02004063 if (!skb)
4064 goto out;
4065
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004066 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4067
Arik Nemtsov02945822011-11-10 11:28:57 +02004068 hdr = (struct ieee80211_hdr *) skb->data;
4069 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4070
4071out:
4072 rcu_read_unlock();
4073 return skb;
4074}
4075EXPORT_SYMBOL(ieee80211_proberesp_get);
4076
Kalle Valo7044cc52010-01-05 20:16:19 +02004077struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4078 struct ieee80211_vif *vif)
4079{
4080 struct ieee80211_sub_if_data *sdata;
4081 struct ieee80211_if_managed *ifmgd;
4082 struct ieee80211_pspoll *pspoll;
4083 struct ieee80211_local *local;
4084 struct sk_buff *skb;
4085
4086 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4087 return NULL;
4088
4089 sdata = vif_to_sdata(vif);
4090 ifmgd = &sdata->u.mgd;
4091 local = sdata->local;
4092
4093 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
Joe Perchesd15b8452011-08-29 14:17:31 -07004094 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02004095 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07004096
Kalle Valo7044cc52010-01-05 20:16:19 +02004097 skb_reserve(skb, local->hw.extra_tx_headroom);
4098
4099 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4100 memset(pspoll, 0, sizeof(*pspoll));
4101 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4102 IEEE80211_STYPE_PSPOLL);
4103 pspoll->aid = cpu_to_le16(ifmgd->aid);
4104
4105 /* aid in PS-Poll has its two MSBs each set to 1 */
4106 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4107
4108 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4109 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4110
4111 return skb;
4112}
4113EXPORT_SYMBOL(ieee80211_pspoll_get);
4114
4115struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4116 struct ieee80211_vif *vif)
4117{
4118 struct ieee80211_hdr_3addr *nullfunc;
4119 struct ieee80211_sub_if_data *sdata;
4120 struct ieee80211_if_managed *ifmgd;
4121 struct ieee80211_local *local;
4122 struct sk_buff *skb;
4123
4124 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4125 return NULL;
4126
4127 sdata = vif_to_sdata(vif);
4128 ifmgd = &sdata->u.mgd;
4129 local = sdata->local;
4130
4131 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
Joe Perchesd15b8452011-08-29 14:17:31 -07004132 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02004133 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07004134
Kalle Valo7044cc52010-01-05 20:16:19 +02004135 skb_reserve(skb, local->hw.extra_tx_headroom);
4136
4137 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4138 sizeof(*nullfunc));
4139 memset(nullfunc, 0, sizeof(*nullfunc));
4140 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4141 IEEE80211_STYPE_NULLFUNC |
4142 IEEE80211_FCTL_TODS);
4143 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4144 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4145 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4146
4147 return skb;
4148}
4149EXPORT_SYMBOL(ieee80211_nullfunc_get);
4150
Kalle Valo05e54ea2010-01-05 20:16:38 +02004151struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
Johannes Berga344d672014-06-12 22:24:31 +02004152 const u8 *src_addr,
Kalle Valo05e54ea2010-01-05 20:16:38 +02004153 const u8 *ssid, size_t ssid_len,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01004154 size_t tailroom)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004155{
Johannes Berga344d672014-06-12 22:24:31 +02004156 struct ieee80211_local *local = hw_to_local(hw);
Kalle Valo05e54ea2010-01-05 20:16:38 +02004157 struct ieee80211_hdr_3addr *hdr;
4158 struct sk_buff *skb;
4159 size_t ie_ssid_len;
4160 u8 *pos;
4161
Kalle Valo05e54ea2010-01-05 20:16:38 +02004162 ie_ssid_len = 2 + ssid_len;
4163
4164 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
Johannes Bergb9a9ada2012-11-29 13:00:10 +01004165 ie_ssid_len + tailroom);
Joe Perchesd15b8452011-08-29 14:17:31 -07004166 if (!skb)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004167 return NULL;
Kalle Valo05e54ea2010-01-05 20:16:38 +02004168
4169 skb_reserve(skb, local->hw.extra_tx_headroom);
4170
4171 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4172 memset(hdr, 0, sizeof(*hdr));
4173 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4174 IEEE80211_STYPE_PROBE_REQ);
Johannes Berge83e6542012-07-13 16:23:07 +02004175 eth_broadcast_addr(hdr->addr1);
Johannes Berga344d672014-06-12 22:24:31 +02004176 memcpy(hdr->addr2, src_addr, ETH_ALEN);
Johannes Berge83e6542012-07-13 16:23:07 +02004177 eth_broadcast_addr(hdr->addr3);
Kalle Valo05e54ea2010-01-05 20:16:38 +02004178
4179 pos = skb_put(skb, ie_ssid_len);
4180 *pos++ = WLAN_EID_SSID;
4181 *pos++ = ssid_len;
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02004182 if (ssid_len)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004183 memcpy(pos, ssid, ssid_len);
4184 pos += ssid_len;
4185
Kalle Valo05e54ea2010-01-05 20:16:38 +02004186 return skb;
4187}
4188EXPORT_SYMBOL(ieee80211_probereq_get);
4189
Johannes Berg32bfd352007-12-19 01:31:26 +01004190void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02004191 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02004192 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02004193 struct ieee80211_rts *rts)
4194{
4195 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02004196
Harvey Harrison065e96052008-06-22 16:45:27 -07004197 rts->frame_control =
4198 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01004199 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4200 frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02004201 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4202 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4203}
4204EXPORT_SYMBOL(ieee80211_rts_get);
4205
Johannes Berg32bfd352007-12-19 01:31:26 +01004206void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02004207 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02004208 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02004209 struct ieee80211_cts *cts)
4210{
4211 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02004212
Harvey Harrison065e96052008-06-22 16:45:27 -07004213 cts->frame_control =
4214 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01004215 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4216 frame_len, frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02004217 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4218}
4219EXPORT_SYMBOL(ieee80211_ctstoself_get);
4220
4221struct sk_buff *
Johannes Berg32bfd352007-12-19 01:31:26 +01004222ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +02004223 struct ieee80211_vif *vif)
Johannes Berge2ebc742007-07-27 15:43:22 +02004224{
4225 struct ieee80211_local *local = hw_to_local(hw);
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004226 struct sk_buff *skb = NULL;
Johannes Berg5cf121c2008-02-25 16:27:43 +01004227 struct ieee80211_tx_data tx;
Johannes Berge2ebc742007-07-27 15:43:22 +02004228 struct ieee80211_sub_if_data *sdata;
Marco Porschd012a602012-10-10 12:39:50 -07004229 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +02004230 struct ieee80211_tx_info *info;
Johannes Berg55de9082012-07-26 17:24:39 +02004231 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02004232
Johannes Berg32bfd352007-12-19 01:31:26 +01004233 sdata = vif_to_sdata(vif);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004234
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004235 rcu_read_lock();
Johannes Berg55de9082012-07-26 17:24:39 +02004236 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004237
Marco Porschd012a602012-10-10 12:39:50 -07004238 if (!chanctx_conf)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004239 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004240
Marco Porschd012a602012-10-10 12:39:50 -07004241 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4242 struct beacon_data *beacon =
4243 rcu_dereference(sdata->u.ap.beacon);
4244
4245 if (!beacon || !beacon->head)
4246 goto out;
4247
4248 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +01004249 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4250 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -07004251 } else {
4252 goto out;
4253 }
4254
4255 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004256 goto out; /* send buffered bc/mc only after DTIM beacon */
Johannes Berge039fa42008-05-15 12:55:29 +02004257
Johannes Berge2ebc742007-07-27 15:43:22 +02004258 while (1) {
Marco Porschd012a602012-10-10 12:39:50 -07004259 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +02004260 if (!skb)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004261 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02004262 local->total_ps_buffered--;
4263
Marco Porschd012a602012-10-10 12:39:50 -07004264 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
Johannes Berge2ebc742007-07-27 15:43:22 +02004265 struct ieee80211_hdr *hdr =
4266 (struct ieee80211_hdr *) skb->data;
4267 /* more buffered multicast/broadcast frames ==> set
4268 * MoreData flag in IEEE 802.11 header to inform PS
4269 * STAs */
4270 hdr->frame_control |=
4271 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4272 }
4273
Michael Braun112c44b2014-03-06 15:08:43 +01004274 if (sdata->vif.type == NL80211_IFTYPE_AP)
Marco Porsch7cbf9d02013-03-01 16:01:18 +01004275 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
Johannes Berg7c107702015-03-20 14:18:27 +01004276 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
Johannes Berge2ebc742007-07-27 15:43:22 +02004277 break;
Felix Fietkau6b07d9c2016-08-02 11:13:41 +02004278 ieee80211_free_txskb(hw, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02004279 }
Johannes Berge039fa42008-05-15 12:55:29 +02004280
4281 info = IEEE80211_SKB_CB(skb);
4282
Johannes Berg5cf121c2008-02-25 16:27:43 +01004283 tx.flags |= IEEE80211_TX_PS_BUFFERED;
Johannes Berg4bf88532012-11-09 11:39:59 +01004284 info->band = chanctx_conf->def.chan->band;
Johannes Berge2ebc742007-07-27 15:43:22 +02004285
Johannes Berg97b045d2008-06-20 01:22:30 +02004286 if (invoke_tx_handlers(&tx))
Johannes Berge2ebc742007-07-27 15:43:22 +02004287 skb = NULL;
Johannes Berg97b045d2008-06-20 01:22:30 +02004288 out:
Johannes Bergd0709a62008-02-25 16:27:46 +01004289 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004290
4291 return skb;
4292}
4293EXPORT_SYMBOL(ieee80211_get_buffered_bc);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004294
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004295int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4296{
4297 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4298 struct ieee80211_sub_if_data *sdata = sta->sdata;
4299 struct ieee80211_local *local = sdata->local;
4300 int ret;
4301 u32 queues;
4302
4303 lockdep_assert_held(&local->sta_mtx);
4304
4305 /* only some cases are supported right now */
4306 switch (sdata->vif.type) {
4307 case NL80211_IFTYPE_STATION:
4308 case NL80211_IFTYPE_AP:
4309 case NL80211_IFTYPE_AP_VLAN:
4310 break;
4311 default:
4312 WARN_ON(1);
4313 return -EINVAL;
4314 }
4315
4316 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4317 return -EINVAL;
4318
4319 if (sta->reserved_tid == tid) {
4320 ret = 0;
4321 goto out;
4322 }
4323
4324 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4325 sdata_err(sdata, "TID reservation already active\n");
4326 ret = -EALREADY;
4327 goto out;
4328 }
4329
4330 ieee80211_stop_vif_queues(sdata->local, sdata,
4331 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4332
4333 synchronize_net();
4334
4335 /* Tear down BA sessions so we stop aggregating on this TID */
Johannes Berg30686bf2015-06-02 21:39:54 +02004336 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004337 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4338 __ieee80211_stop_tx_ba_session(sta, tid,
4339 AGG_STOP_LOCAL_REQUEST);
4340 }
4341
4342 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +02004343 __ieee80211_flush_queues(local, sdata, queues, false);
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004344
4345 sta->reserved_tid = tid;
4346
4347 ieee80211_wake_vif_queues(local, sdata,
4348 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4349
Johannes Berg30686bf2015-06-02 21:39:54 +02004350 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004351 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4352
4353 ret = 0;
4354 out:
4355 return ret;
4356}
4357EXPORT_SYMBOL(ieee80211_reserve_tid);
4358
4359void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4360{
4361 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4362 struct ieee80211_sub_if_data *sdata = sta->sdata;
4363
4364 lockdep_assert_held(&sdata->local->sta_mtx);
4365
4366 /* only some cases are supported right now */
4367 switch (sdata->vif.type) {
4368 case NL80211_IFTYPE_STATION:
4369 case NL80211_IFTYPE_AP:
4370 case NL80211_IFTYPE_AP_VLAN:
4371 break;
4372 default:
4373 WARN_ON(1);
4374 return;
4375 }
4376
4377 if (tid != sta->reserved_tid) {
4378 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4379 return;
4380 }
4381
4382 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4383}
4384EXPORT_SYMBOL(ieee80211_unreserve_tid);
4385
Johannes Berg55de9082012-07-26 17:24:39 +02004386void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4387 struct sk_buff *skb, int tid,
Johannes Berg57fbcce2016-04-12 15:56:15 +02004388 enum nl80211_band band)
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004389{
Christian Lamparter353d09c2012-07-07 15:07:13 +02004390 int ac = ieee802_1d_to_ac[tid & 7];
Johannes Berg3a25a8c2012-04-03 16:28:50 +02004391
Zhang Shengjud57a5442016-03-03 01:16:56 +00004392 skb_reset_mac_header(skb);
4393 skb_reset_network_header(skb);
4394 skb_reset_transport_header(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004395
Johannes Berg3a25a8c2012-04-03 16:28:50 +02004396 skb_set_queue_mapping(skb, ac);
Helmut Schaacf6bb792011-12-15 10:18:34 +01004397 skb->priority = tid;
Johannes Bergcf0277e2010-01-05 18:00:58 +01004398
Johannes Berg89afe612013-02-13 15:39:57 +01004399 skb->dev = sdata->dev;
4400
Johannes Berg3d34deb2009-06-18 17:25:11 +02004401 /*
4402 * The other path calling ieee80211_xmit is from the tasklet,
4403 * and while we can handle concurrent transmissions locking
4404 * requirements are that we do not come into tx with bhs on.
4405 */
4406 local_bh_disable();
Johannes Berg73c4e192014-11-09 18:50:09 +02004407 IEEE80211_SKB_CB(skb)->band = band;
Johannes Berg7c107702015-03-20 14:18:27 +01004408 ieee80211_xmit(sdata, NULL, skb);
Johannes Berg3d34deb2009-06-18 17:25:11 +02004409 local_bh_enable();
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004410}