blob: cd332e3e1134bed3efb89838ac245b0402e7a604 [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
Sara Sharon914eac22018-04-20 13:49:19 +03007 * Copyright (C) 2018 Intel Corporation
Johannes Berge2ebc742007-07-27 15:43:22 +02008 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 *
14 * Transmit and frame generation functions.
15 */
16
17#include <linux/kernel.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
Michael Braunebceec82016-11-22 11:52:18 +010020#include <linux/if_vlan.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020021#include <linux/etherdevice.h>
22#include <linux/bitmap.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040023#include <linux/rcupdate.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040024#include <linux/export.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070025#include <net/net_namespace.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020026#include <net/ieee80211_radiotap.h>
27#include <net/cfg80211.h>
28#include <net/mac80211.h>
Michal Kazior5caa3282016-05-19 10:37:51 +020029#include <net/codel.h>
30#include <net/codel_impl.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020031#include <asm/unaligned.h>
Michal Kaziorfa962b92016-05-19 10:37:49 +020032#include <net/fq_impl.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020033
34#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020035#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040036#include "led.h"
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +010037#include "mesh.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020038#include "wep.h"
39#include "wpa.h"
40#include "wme.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040041#include "rate.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020042
Johannes Berge2ebc742007-07-27 15:43:22 +020043/* misc utils */
44
Johannes Berg5a490512015-04-22 17:10:38 +020045static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
46{
47 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
48
49 u64_stats_update_begin(&tstats->syncp);
50 tstats->tx_packets++;
51 tstats->tx_bytes += len;
52 u64_stats_update_end(&tstats->syncp);
53}
54
Johannes Berg252b86c2011-11-16 15:28:55 +010055static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
56 struct sk_buff *skb, int group_addr,
Johannes Berg03f93c32008-06-25 14:36:27 +030057 int next_frag_len)
Johannes Berge2ebc742007-07-27 15:43:22 +020058{
Simon Wunderlich2103dec2013-07-08 16:55:53 +020059 int rate, mrate, erp, dur, i, shift = 0;
Johannes Berg2e92e6f2008-05-15 12:55:27 +020060 struct ieee80211_rate *txrate;
Johannes Berge2ebc742007-07-27 15:43:22 +020061 struct ieee80211_local *local = tx->local;
Johannes Berg8318d782008-01-24 19:38:38 +010062 struct ieee80211_supported_band *sband;
Harvey Harrison358c8d92008-07-15 18:44:13 -070063 struct ieee80211_hdr *hdr;
Johannes Berg252b86c2011-11-16 15:28:55 +010064 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Simon Wunderlich2103dec2013-07-08 16:55:53 +020065 struct ieee80211_chanctx_conf *chanctx_conf;
66 u32 rate_flags = 0;
67
Felix Fietkau95cd4702016-12-14 20:46:57 +010068 /* assume HW handles this */
69 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
70 return 0;
71
Simon Wunderlich2103dec2013-07-08 16:55:53 +020072 rcu_read_lock();
73 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
74 if (chanctx_conf) {
75 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
76 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
77 }
78 rcu_read_unlock();
Johannes Berge6a98542008-10-21 12:40:02 +020079
Johannes Berge6a98542008-10-21 12:40:02 +020080 /* uh huh? */
Felix Fietkau0d528d82013-04-22 16:14:41 +020081 if (WARN_ON_ONCE(tx->rate.idx < 0))
Johannes Berge6a98542008-10-21 12:40:02 +020082 return 0;
Johannes Berge2ebc742007-07-27 15:43:22 +020083
Johannes Berg2d565772012-07-23 15:12:51 +020084 sband = local->hw.wiphy->bands[info->band];
Felix Fietkau0d528d82013-04-22 16:14:41 +020085 txrate = &sband->bitrates[tx->rate.idx];
Johannes Berg8318d782008-01-24 19:38:38 +010086
Johannes Berge6a98542008-10-21 12:40:02 +020087 erp = txrate->flags & IEEE80211_RATE_ERP_G;
Johannes Berge2ebc742007-07-27 15:43:22 +020088
89 /*
90 * data and mgmt (except PS Poll):
91 * - during CFP: 32768
92 * - during contention period:
93 * if addr1 is group address: 0
94 * if more fragments = 0 and addr1 is individual address: time to
95 * transmit one ACK plus SIFS
96 * if more fragments = 1 and addr1 is individual address: time to
97 * transmit next fragment plus 2 x ACK plus 3 x SIFS
98 *
99 * IEEE 802.11, 9.6:
100 * - control response frame (CTS or ACK) shall be transmitted using the
101 * same rate as the immediately previous frame in the frame exchange
102 * sequence, if this rate belongs to the PHY mandatory rates, or else
103 * at the highest possible rate belonging to the PHY rates in the
104 * BSSBasicRateSet
105 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100106 hdr = (struct ieee80211_hdr *)skb->data;
Harvey Harrison358c8d92008-07-15 18:44:13 -0700107 if (ieee80211_is_ctl(hdr->frame_control)) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200108 /* TODO: These control frames are not currently sent by
Johannes Bergccd7b362008-09-11 00:01:56 +0200109 * mac80211, but should they be implemented, this function
Johannes Berge2ebc742007-07-27 15:43:22 +0200110 * needs to be updated to support duration field calculation.
111 *
112 * RTS: time needed to transmit pending data/mgmt frame plus
113 * one CTS frame plus one ACK frame plus 3 x SIFS
114 * CTS: duration of immediately previous RTS minus time
115 * required to transmit CTS and its SIFS
116 * ACK: 0 if immediately previous directed data/mgmt had
117 * more=0, with more=1 duration in ACK frame is duration
118 * from previous frame minus time needed to transmit ACK
119 * and its SIFS
120 * PS Poll: BIT(15) | BIT(14) | aid
121 */
122 return 0;
123 }
124
125 /* data/mgmt */
126 if (0 /* FIX: data/mgmt during CFP */)
Johannes Berg03f93c32008-06-25 14:36:27 +0300127 return cpu_to_le16(32768);
Johannes Berge2ebc742007-07-27 15:43:22 +0200128
129 if (group_addr) /* Group address as the destination - no ACK */
130 return 0;
131
132 /* Individual destination address:
133 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
134 * CTS and ACK frames shall be transmitted using the highest rate in
135 * basic rate set that is less than or equal to the rate of the
136 * immediately previous frame and that is using the same modulation
137 * (CCK or OFDM). If no basic rate set matches with these requirements,
138 * the highest mandatory rate of the PHY that is less than or equal to
139 * the rate of the previous frame is used.
140 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
141 */
142 rate = -1;
Johannes Berg8318d782008-01-24 19:38:38 +0100143 /* use lowest available if everything fails */
144 mrate = sband->bitrates[0].bitrate;
145 for (i = 0; i < sband->n_bitrates; i++) {
146 struct ieee80211_rate *r = &sband->bitrates[i];
147
148 if (r->bitrate > txrate->bitrate)
Johannes Berge2ebc742007-07-27 15:43:22 +0200149 break;
150
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200151 if ((rate_flags & r->flags) != rate_flags)
152 continue;
153
Johannes Bergbda39332008-10-11 01:51:51 +0200154 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200155 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200156
Johannes Berg8318d782008-01-24 19:38:38 +0100157 switch (sband->band) {
Johannes Berg57fbcce2016-04-12 15:56:15 +0200158 case NL80211_BAND_2GHZ: {
Johannes Berg8318d782008-01-24 19:38:38 +0100159 u32 flag;
160 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
161 flag = IEEE80211_RATE_MANDATORY_G;
162 else
163 flag = IEEE80211_RATE_MANDATORY_B;
164 if (r->flags & flag)
165 mrate = r->bitrate;
166 break;
167 }
Johannes Berg57fbcce2016-04-12 15:56:15 +0200168 case NL80211_BAND_5GHZ:
Johannes Berg8318d782008-01-24 19:38:38 +0100169 if (r->flags & IEEE80211_RATE_MANDATORY_A)
170 mrate = r->bitrate;
171 break;
Johannes Berg57fbcce2016-04-12 15:56:15 +0200172 case NL80211_BAND_60GHZ:
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300173 /* TODO, for now fall through */
Johannes Berg57fbcce2016-04-12 15:56:15 +0200174 case NUM_NL80211_BANDS:
Johannes Berg8318d782008-01-24 19:38:38 +0100175 WARN_ON(1);
176 break;
177 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200178 }
179 if (rate == -1) {
180 /* No matching basic rate found; use highest suitable mandatory
181 * PHY rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200182 rate = DIV_ROUND_UP(mrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200183 }
184
Simon Wunderlich6674f212011-11-21 21:34:30 +0100185 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
186 if (ieee80211_is_data_qos(hdr->frame_control) &&
Claudio Pisac26a0e12012-05-28 13:06:25 +0100187 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
Simon Wunderlich6674f212011-11-21 21:34:30 +0100188 dur = 0;
189 else
190 /* Time needed to transmit ACK
191 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
192 * to closest integer */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200193 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200194 tx->sdata->vif.bss_conf.use_short_preamble,
195 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200196
197 if (next_frag_len) {
198 /* Frame is fragmented: duration increases with time needed to
199 * transmit next fragment plus ACK and 2 x SIFS. */
200 dur *= 2; /* ACK + SIFS */
201 /* next fragment */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200202 dur += ieee80211_frame_duration(sband->band, next_frag_len,
Johannes Berg8318d782008-01-24 19:38:38 +0100203 txrate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200204 tx->sdata->vif.bss_conf.use_short_preamble,
205 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200206 }
207
Johannes Berg03f93c32008-06-25 14:36:27 +0300208 return cpu_to_le16(dur);
Johannes Berge2ebc742007-07-27 15:43:22 +0200209}
210
Johannes Berge2ebc742007-07-27 15:43:22 +0200211/* tx handlers */
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200212static ieee80211_tx_result debug_noinline
213ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
214{
215 struct ieee80211_local *local = tx->local;
Kalle Valo0c742112010-01-12 10:42:53 +0200216 struct ieee80211_if_managed *ifmgd;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200217
218 /* driver doesn't support power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200219 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200220 return TX_CONTINUE;
221
222 /* hardware does dynamic power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200223 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200224 return TX_CONTINUE;
225
226 /* dynamic power save disabled */
227 if (local->hw.conf.dynamic_ps_timeout <= 0)
228 return TX_CONTINUE;
229
230 /* we are scanning, don't enable power save */
231 if (local->scanning)
232 return TX_CONTINUE;
233
234 if (!local->ps_sdata)
235 return TX_CONTINUE;
236
237 /* No point if we're going to suspend */
238 if (local->quiescing)
239 return TX_CONTINUE;
240
Kalle Valo0c742112010-01-12 10:42:53 +0200241 /* dynamic ps is supported only in managed mode */
242 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
243 return TX_CONTINUE;
244
245 ifmgd = &tx->sdata->u.mgd;
246
247 /*
248 * Don't wakeup from power save if u-apsd is enabled, voip ac has
249 * u-apsd enabled and the frame is in voip class. This effectively
250 * means that even if all access categories have u-apsd enabled, in
251 * practise u-apsd is only used with the voip ac. This is a
252 * workaround for the case when received voip class packets do not
253 * have correct qos tag for some reason, due the network or the
254 * peer application.
255 *
Eliad Pellerdc41e4d2012-03-14 16:15:03 +0200256 * Note: ifmgd->uapsd_queues access is racy here. If the value is
Kalle Valo0c742112010-01-12 10:42:53 +0200257 * changed via debugfs, user needs to reassociate manually to have
258 * everything in sync.
259 */
Johannes Berg4875d30d2012-03-27 14:18:37 +0200260 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
261 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
262 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
Kalle Valo0c742112010-01-12 10:42:53 +0200263 return TX_CONTINUE;
264
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200265 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
266 ieee80211_stop_queues_by_reason(&local->hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100267 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300268 IEEE80211_QUEUE_STOP_REASON_PS,
269 false);
Vivek Natarajandb285692011-02-18 17:18:03 +0530270 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200271 ieee80211_queue_work(&local->hw,
272 &local->dynamic_ps_disable_work);
273 }
274
Luciano Coelho5db1c072011-05-03 21:40:08 +0300275 /* Don't restart the timer if we're not disassociated */
276 if (!ifmgd->associated)
277 return TX_CONTINUE;
278
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200279 mod_timer(&local->dynamic_ps_timer, jiffies +
280 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
281
282 return TX_CONTINUE;
283}
Johannes Berge2ebc742007-07-27 15:43:22 +0200284
Johannes Bergd9e8a702008-06-30 15:10:44 +0200285static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100286ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200287{
Harvey Harrison358c8d92008-07-15 18:44:13 -0700288
Johannes Berge039fa42008-05-15 12:55:29 +0200289 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Berge039fa42008-05-15 12:55:29 +0200290 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200291 bool assoc = false;
Johannes Berge2ebc742007-07-27 15:43:22 +0200292
Johannes Berge039fa42008-05-15 12:55:29 +0200293 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100294 return TX_CONTINUE;
Johannes Berg58d41852007-09-26 17:53:18 +0200295
Ben Greearb23b0252011-02-04 11:54:17 -0800296 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
297 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
Kalle Valoa9a6fff2009-03-18 14:06:44 +0200298 !ieee80211_is_probe_req(hdr->frame_control) &&
299 !ieee80211_is_nullfunc(hdr->frame_control))
300 /*
301 * When software scanning only nullfunc frames (to notify
302 * the sleep state to the AP) and probe requests (for the
303 * active scan) are allowed, all other frames should not be
304 * sent and we should not get here, but if we do
305 * nonetheless, drop them to avoid sending them
306 * off-channel. See the link below and
307 * ieee80211_start_scan() for more.
308 *
309 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
310 */
Johannes Berg9ae54c82008-01-31 19:48:20 +0100311 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200312
Rostislav Lisovy239281f2014-11-03 10:33:19 +0100313 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
314 return TX_CONTINUE;
315
Bill Jordan1be7fe82010-10-01 11:20:41 -0400316 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
317 return TX_CONTINUE;
318
Johannes Berg5cf121c2008-02-25 16:27:43 +0100319 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
Johannes Berg9ae54c82008-01-31 19:48:20 +0100320 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200321
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200322 if (tx->sta)
323 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge2ebc742007-07-27 15:43:22 +0200324
Johannes Berg5cf121c2008-02-25 16:27:43 +0100325 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200326 if (unlikely(!assoc &&
Harvey Harrison358c8d92008-07-15 18:44:13 -0700327 ieee80211_is_data(hdr->frame_control))) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200328#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200329 sdata_info(tx->sdata,
330 "dropped data frame to not associated station %pM\n",
331 hdr->addr1);
332#endif
Johannes Berge2ebc742007-07-27 15:43:22 +0200333 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
Johannes Berg9ae54c82008-01-31 19:48:20 +0100334 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200335 }
Michael Braun72f15d52016-10-10 19:12:21 +0200336 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
337 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
Johannes Berg29623892011-12-14 12:20:31 +0100338 /*
339 * No associated STAs - no need to send multicast
340 * frames.
341 */
342 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200343 }
344
Johannes Berg9ae54c82008-01-31 19:48:20 +0100345 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200346}
347
Johannes Berge2ebc742007-07-27 15:43:22 +0200348/* This function is called whenever the AP is about to exceed the maximum limit
349 * of buffered frames for power saving STAs. This situation should not really
350 * happen often during normal operation, so dropping the oldest buffered packet
351 * from each queue should be OK to make some room for new frames. */
352static void purge_old_ps_buffers(struct ieee80211_local *local)
353{
354 int total = 0, purged = 0;
355 struct sk_buff *skb;
356 struct ieee80211_sub_if_data *sdata;
357 struct sta_info *sta;
358
Johannes Berg79010422007-09-18 17:29:21 -0400359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Marco Porschd012a602012-10-10 12:39:50 -0700360 struct ps_data *ps;
361
362 if (sdata->vif.type == NL80211_IFTYPE_AP)
363 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100364 else if (ieee80211_vif_is_mesh(&sdata->vif))
365 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700366 else
Johannes Berge2ebc742007-07-27 15:43:22 +0200367 continue;
Marco Porschd012a602012-10-10 12:39:50 -0700368
369 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200370 if (skb) {
371 purged++;
Felix Fietkau6b07d9c2016-08-02 11:13:41 +0200372 ieee80211_free_txskb(&local->hw, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +0200373 }
Marco Porschd012a602012-10-10 12:39:50 -0700374 total += skb_queue_len(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200375 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200376
Johannes Berg948d8872011-09-29 16:04:29 +0200377 /*
378 * Drop one frame from each station from the lowest-priority
379 * AC that has frames at all.
380 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100381 list_for_each_entry_rcu(sta, &local->sta_list, list) {
Johannes Berg948d8872011-09-29 16:04:29 +0200382 int ac;
383
384 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
385 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
386 total += skb_queue_len(&sta->ps_tx_buf[ac]);
387 if (skb) {
388 purged++;
Felix Fietkauc3e77242012-10-08 14:39:33 +0200389 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg948d8872011-09-29 16:04:29 +0200390 break;
391 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200392 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200393 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100394
Johannes Berge2ebc742007-07-27 15:43:22 +0200395 local->total_ps_buffered = total;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200396 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
Johannes Berge2ebc742007-07-27 15:43:22 +0200397}
398
Johannes Berg9ae54c82008-01-31 19:48:20 +0100399static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100400ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200401{
Johannes Berge039fa42008-05-15 12:55:29 +0200402 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Marco Porschd012a602012-10-10 12:39:50 -0700404 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +0200405
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100406 /*
407 * broadcast/multicast frame
408 *
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100409 * If any of the associated/peer stations is in power save mode,
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100410 * the frame is buffered to be sent after DTIM beacon frame.
411 * This is done either by the hardware or us.
412 */
413
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100414 /* powersaving STAs currently only in AP/VLAN/mesh mode */
Marco Porschd012a602012-10-10 12:39:50 -0700415 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
416 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
417 if (!tx->sdata->bss)
418 return TX_CONTINUE;
419
420 ps = &tx->sdata->bss->ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100421 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
422 ps = &tx->sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700423 } else {
Johannes Berg3e122be2008-07-09 14:40:34 +0200424 return TX_CONTINUE;
Marco Porschd012a602012-10-10 12:39:50 -0700425 }
426
Johannes Berg3e122be2008-07-09 14:40:34 +0200427
428 /* no buffering for ordered frames */
Harvey Harrison358c8d92008-07-15 18:44:13 -0700429 if (ieee80211_has_order(hdr->frame_control))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100430 return TX_CONTINUE;
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100431
Johannes Berg08b99392014-07-07 12:01:11 +0200432 if (ieee80211_is_probe_req(hdr->frame_control))
433 return TX_CONTINUE;
434
Johannes Berg30686bf2015-06-02 21:39:54 +0200435 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
Johannes Bergf4d57942013-05-28 17:24:15 +0200436 info->hw_queue = tx->sdata->vif.cab_queue;
437
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100438 /* no stations in PS mode */
Marco Porschd012a602012-10-10 12:39:50 -0700439 if (!atomic_read(&ps->num_sta_ps))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100440 return TX_CONTINUE;
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100441
Johannes Berg62b517c2009-10-29 12:19:21 +0100442 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
Johannes Berg62b12082009-08-10 16:04:15 +0200443
Johannes Berg62b517c2009-10-29 12:19:21 +0100444 /* device releases frame after DTIM beacon */
Johannes Berg30686bf2015-06-02 21:39:54 +0200445 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
Johannes Berg62b12082009-08-10 16:04:15 +0200446 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200447
Johannes Berg62b12082009-08-10 16:04:15 +0200448 /* buffered in mac80211 */
449 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
450 purge_old_ps_buffers(tx->local);
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100451
Marco Porschd012a602012-10-10 12:39:50 -0700452 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200453 ps_dbg(tx->sdata,
454 "BC TX buffer full - dropping the oldest frame\n");
Felix Fietkau6b07d9c2016-08-02 11:13:41 +0200455 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
Johannes Berg62b12082009-08-10 16:04:15 +0200456 } else
457 tx->local->total_ps_buffered++;
458
Marco Porschd012a602012-10-10 12:39:50 -0700459 skb_queue_tail(&ps->bc_buf, tx->skb);
Johannes Berg62b12082009-08-10 16:04:15 +0200460
461 return TX_QUEUED;
Johannes Berge2ebc742007-07-27 15:43:22 +0200462}
463
Jouni Malinenfb733332009-01-08 13:32:00 +0200464static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
465 struct sk_buff *skb)
466{
467 if (!ieee80211_is_mgmt(fc))
468 return 0;
469
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200470 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
Jouni Malinenfb733332009-01-08 13:32:00 +0200471 return 0;
472
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100473 if (!ieee80211_is_robust_mgmt_frame(skb))
Jouni Malinenfb733332009-01-08 13:32:00 +0200474 return 0;
475
476 return 1;
477}
478
Johannes Berg9ae54c82008-01-31 19:48:20 +0100479static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100480ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200481{
482 struct sta_info *sta = tx->sta;
Johannes Berge039fa42008-05-15 12:55:29 +0200483 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg08b99392014-07-07 12:01:11 +0200484 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300485 struct ieee80211_local *local = tx->local;
Johannes Berge2ebc742007-07-27 15:43:22 +0200486
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100487 if (unlikely(!sta))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100488 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200489
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200490 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
Johannes Berg5ac2e352014-05-27 16:32:27 +0200491 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
492 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100493 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
Johannes Berg948d8872011-09-29 16:04:29 +0200494 int ac = skb_get_queue_mapping(tx->skb);
495
Johannes Berg08b99392014-07-07 12:01:11 +0200496 if (ieee80211_is_mgmt(hdr->frame_control) &&
497 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
498 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
499 return TX_CONTINUE;
500 }
501
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200502 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
503 sta->sta.addr, sta->sta.aid, ac);
Johannes Berge2ebc742007-07-27 15:43:22 +0200504 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
505 purge_old_ps_buffers(tx->local);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200506
507 /* sync with ieee80211_sta_ps_deliver_wakeup */
508 spin_lock(&sta->ps_lock);
509 /*
510 * STA woke up the meantime and all the frames on ps_tx_buf have
511 * been queued to pending queue. No reordering can happen, go
512 * ahead and Tx the packet.
513 */
514 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Berg5ac2e352014-05-27 16:32:27 +0200515 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
516 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200517 spin_unlock(&sta->ps_lock);
518 return TX_CONTINUE;
519 }
520
Johannes Berg948d8872011-09-29 16:04:29 +0200521 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
522 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200523 ps_dbg(tx->sdata,
524 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
525 sta->sta.addr, ac);
Felix Fietkauc3e77242012-10-08 14:39:33 +0200526 ieee80211_free_txskb(&local->hw, old);
Johannes Berge2ebc742007-07-27 15:43:22 +0200527 } else
528 tx->local->total_ps_buffered++;
Johannes Berg004c8722008-02-20 11:21:35 +0100529
Johannes Berge039fa42008-05-15 12:55:29 +0200530 info->control.jiffies = jiffies;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200531 info->control.vif = &tx->sdata->vif;
Johannes Berg8f77f382009-06-07 21:58:37 +0200532 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Johannes Berg03c8c062014-01-09 01:45:28 +0100533 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berg948d8872011-09-29 16:04:29 +0200534 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200535 spin_unlock(&sta->ps_lock);
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300536
537 if (!timer_pending(&local->sta_cleanup))
538 mod_timer(&local->sta_cleanup,
539 round_jiffies(jiffies +
540 STA_INFO_CLEANUP_INTERVAL));
541
Johannes Bergc868cb352011-09-29 16:04:27 +0200542 /*
543 * We queued up some frames, so the TIM bit might
544 * need to be set, recalculate it.
545 */
546 sta_info_recalc_tim(sta);
547
Johannes Berg9ae54c82008-01-31 19:48:20 +0100548 return TX_QUEUED;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200549 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
550 ps_dbg(tx->sdata,
551 "STA %pM in PS mode, but polling/in SP -> send frame\n",
552 sta->sta.addr);
Johannes Berge2ebc742007-07-27 15:43:22 +0200553 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200554
Johannes Berg9ae54c82008-01-31 19:48:20 +0100555 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200556}
557
Johannes Bergd9e8a702008-06-30 15:10:44 +0200558static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100559ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200560{
Johannes Berg5cf121c2008-02-25 16:27:43 +0100561 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100562 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200563
Johannes Berg5cf121c2008-02-25 16:27:43 +0100564 if (tx->flags & IEEE80211_TX_UNICAST)
Johannes Berge2ebc742007-07-27 15:43:22 +0200565 return ieee80211_tx_h_unicast_ps_buf(tx);
566 else
567 return ieee80211_tx_h_multicast_ps_buf(tx);
568}
569
Johannes Bergd9e8a702008-06-30 15:10:44 +0200570static ieee80211_tx_result debug_noinline
Johannes Berga621fa42010-08-27 14:26:54 +0300571ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
572{
573 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
574
Johannes Bergaf61a162013-07-02 18:09:12 +0200575 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
576 if (tx->sdata->control_port_no_encrypt)
577 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
578 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
Jouni Malinen9c1c98a2015-02-26 15:50:50 +0200579 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
Johannes Bergaf61a162013-07-02 18:09:12 +0200580 }
Johannes Berga621fa42010-08-27 14:26:54 +0300581
582 return TX_CONTINUE;
583}
584
585static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100586ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200587{
Johannes Berg46e6de12012-07-04 18:10:07 +0200588 struct ieee80211_key *key;
Johannes Berge039fa42008-05-15 12:55:29 +0200589 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700590 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergd4e46a32007-09-14 11:10:24 -0400591
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200592 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
Johannes Berge2ebc742007-07-27 15:43:22 +0200593 tx->key = NULL;
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200594 else if (tx->sta &&
595 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400596 tx->key = key;
Masashi Honma46f6b062016-06-22 19:55:20 +0900597 else if (ieee80211_is_group_privacy_action(tx->skb) &&
598 (key = rcu_dereference(tx->sdata->default_multicast_key)))
599 tx->key = key;
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200600 else if (ieee80211_is_mgmt(hdr->frame_control) &&
Jouni Malinenecbcd322010-03-29 23:35:23 -0700601 is_multicast_ether_addr(hdr->addr1) &&
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100602 ieee80211_is_robust_mgmt_frame(tx->skb) &&
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200603 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
604 tx->key = key;
Johannes Bergf7e01042010-12-09 19:49:02 +0100605 else if (is_multicast_ether_addr(hdr->addr1) &&
606 (key = rcu_dereference(tx->sdata->default_multicast_key)))
607 tx->key = key;
608 else if (!is_multicast_ether_addr(hdr->addr1) &&
609 (key = rcu_dereference(tx->sdata->default_unicast_key)))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400610 tx->key = key;
Johannes Berge8f4fb72015-03-20 11:37:36 +0100611 else
Johannes Berg46e6de12012-07-04 18:10:07 +0200612 tx->key = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +0200613
614 if (tx->key) {
Johannes Berg813d7662010-01-17 01:47:58 +0100615 bool skip_hw = false;
616
Johannes Berg011bfcc2007-09-17 01:29:25 -0400617 /* TODO: add threshold stuff again */
Johannes Berg176e4f82007-12-18 15:27:47 +0100618
Johannes Berg97359d12010-08-10 09:46:38 +0200619 switch (tx->key->conf.cipher) {
620 case WLAN_CIPHER_SUITE_WEP40:
621 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berg97359d12010-08-10 09:46:38 +0200622 case WLAN_CIPHER_SUITE_TKIP:
Harvey Harrison358c8d92008-07-15 18:44:13 -0700623 if (!ieee80211_is_data_present(hdr->frame_control))
Johannes Berg176e4f82007-12-18 15:27:47 +0100624 tx->key = NULL;
625 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200626 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +0200627 case WLAN_CIPHER_SUITE_CCMP_256:
Jouni Malinen00b9cfa2015-01-24 19:52:06 +0200628 case WLAN_CIPHER_SUITE_GCMP:
629 case WLAN_CIPHER_SUITE_GCMP_256:
Jouni Malinenfb733332009-01-08 13:32:00 +0200630 if (!ieee80211_is_data_present(hdr->frame_control) &&
631 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
Masashi Honma46f6b062016-06-22 19:55:20 +0900632 tx->skb) &&
633 !ieee80211_is_group_privacy_action(tx->skb))
Jouni Malinenfb733332009-01-08 13:32:00 +0200634 tx->key = NULL;
Kalle Valo3b43a182010-01-23 20:27:14 +0200635 else
636 skip_hw = (tx->key->conf.flags &
Johannes Berge548c492012-09-04 17:08:23 +0200637 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
Kalle Valo3b43a182010-01-23 20:27:14 +0200638 ieee80211_is_mgmt(hdr->frame_control);
Jouni Malinenfb733332009-01-08 13:32:00 +0200639 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200640 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen56c52da2015-01-24 19:52:08 +0200641 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
Jouni Malinen8ade5382015-01-24 19:52:09 +0200642 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
643 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200644 if (!ieee80211_is_mgmt(hdr->frame_control))
645 tx->key = NULL;
646 break;
Johannes Berg176e4f82007-12-18 15:27:47 +0100647 }
Johannes Berg813d7662010-01-17 01:47:58 +0100648
Johannes Berge54faf22013-01-29 11:41:38 +0100649 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
650 !ieee80211_is_deauth(hdr->frame_control)))
Johannes Berg95acac62011-07-12 12:30:59 +0200651 return TX_DROP;
652
Johannes Bergf12553e2010-01-22 22:07:59 +0100653 if (!skip_hw && tx->key &&
Johannes Berg382b1652010-01-25 11:36:16 +0100654 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
Johannes Berg813d7662010-01-17 01:47:58 +0100655 info->control.hw_key = &tx->key->conf;
Johannes Berge2ebc742007-07-27 15:43:22 +0200656 }
657
Johannes Berg9ae54c82008-01-31 19:48:20 +0100658 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200659}
660
Johannes Bergd9e8a702008-06-30 15:10:44 +0200661static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100662ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200663{
Johannes Berge039fa42008-05-15 12:55:29 +0200664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200665 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
666 struct ieee80211_supported_band *sband;
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700667 u32 len;
Johannes Berge6a98542008-10-21 12:40:02 +0200668 struct ieee80211_tx_rate_control txrc;
Felix Fietkau0d528d82013-04-22 16:14:41 +0200669 struct ieee80211_sta_rates *ratetbl = NULL;
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200670 bool assoc = false;
Johannes Berge6a98542008-10-21 12:40:02 +0200671
672 memset(&txrc, 0, sizeof(txrc));
Johannes Berg8318d782008-01-24 19:38:38 +0100673
Johannes Berg2d565772012-07-23 15:12:51 +0200674 sband = tx->local->hw.wiphy->bands[info->band];
Johannes Berge2ebc742007-07-27 15:43:22 +0200675
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700676 len = min_t(u32, tx->skb->len + FCS_LEN,
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200677 tx->local->hw.wiphy->frag_threshold);
Johannes Berg58d41852007-09-26 17:53:18 +0200678
Johannes Berge6a98542008-10-21 12:40:02 +0200679 /* set up the tx rate control struct we give the RC algo */
Johannes Berg005e4722012-02-26 11:24:35 +0100680 txrc.hw = &tx->local->hw;
Johannes Berge6a98542008-10-21 12:40:02 +0200681 txrc.sband = sband;
682 txrc.bss_conf = &tx->sdata->vif.bss_conf;
683 txrc.skb = tx->skb;
684 txrc.reported_rate.idx = -1;
Johannes Berg2d565772012-07-23 15:12:51 +0200685 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
Felix Fietkau2ffbe6d2013-04-16 13:38:42 +0200686
687 if (tx->sdata->rc_has_mcs_mask[info->band])
688 txrc.rate_idx_mcs_mask =
689 tx->sdata->rc_rateidx_mcs_mask[info->band];
690
Felix Fietkau8f0729b2010-11-11 15:07:23 +0100691 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
Chun-Yeow Yeoh4bb62342011-11-24 17:15:20 -0800692 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
Bertold Van den Bergh5765f9f2015-08-05 16:02:28 +0200693 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
694 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
Johannes Berg58d41852007-09-26 17:53:18 +0200695
Johannes Berge6a98542008-10-21 12:40:02 +0200696 /* set up RTS protection if desired */
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200697 if (len > tx->local->hw.wiphy->rts_threshold) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200698 txrc.rts = true;
Johannes Berge2ebc742007-07-27 15:43:22 +0200699 }
Johannes Berge6a98542008-10-21 12:40:02 +0200700
Felix Fietkau0d528d82013-04-22 16:14:41 +0200701 info->control.use_rts = txrc.rts;
Felix Fietkau991fec02013-04-16 13:38:43 +0200702 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
703
Johannes Berge6a98542008-10-21 12:40:02 +0200704 /*
705 * Use short preamble if the BSS can handle it, but not for
706 * management frames unless we know the receiver can handle
707 * that -- the management frame might be to a station that
708 * just wants a probe response.
709 */
710 if (tx->sdata->vif.bss_conf.use_short_preamble &&
711 (ieee80211_is_data(hdr->frame_control) ||
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200712 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
Felix Fietkau0d528d82013-04-22 16:14:41 +0200713 txrc.short_preamble = true;
714
715 info->control.short_preamble = txrc.short_preamble;
Johannes Berge6a98542008-10-21 12:40:02 +0200716
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +0100717 /* don't ask rate control when rate already injected via radiotap */
718 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
719 return TX_CONTINUE;
720
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200721 if (tx->sta)
722 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge6a98542008-10-21 12:40:02 +0200723
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700724 /*
725 * Lets not bother rate control if we're associated and cannot
726 * talk to the sta. This should not happen.
727 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200728 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700729 !rate_usable_index_exists(sband, &tx->sta->sta),
730 "%s: Dropped data frame as no usable bitrate found while "
731 "scanning and associated. Target station: "
732 "%pM on %d GHz band\n",
Johannes Berg47846c92009-11-25 17:46:19 +0100733 tx->sdata->name, hdr->addr1,
Johannes Berg2d565772012-07-23 15:12:51 +0200734 info->band ? 5 : 2))
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700735 return TX_DROP;
736
737 /*
738 * If we're associated with the sta at this point we know we can at
739 * least send the frame at the lowest bit rate.
740 */
Johannes Berge6a98542008-10-21 12:40:02 +0200741 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
742
Felix Fietkau0d528d82013-04-22 16:14:41 +0200743 if (tx->sta && !info->control.skip_table)
744 ratetbl = rcu_dereference(tx->sta->sta.rates);
745
746 if (unlikely(info->control.rates[0].idx < 0)) {
747 if (ratetbl) {
748 struct ieee80211_tx_rate rate = {
749 .idx = ratetbl->rate[0].idx,
750 .flags = ratetbl->rate[0].flags,
751 .count = ratetbl->rate[0].count
752 };
753
754 if (ratetbl->rate[0].idx < 0)
755 return TX_DROP;
756
757 tx->rate = rate;
758 } else {
759 return TX_DROP;
760 }
761 } else {
762 tx->rate = info->control.rates[0];
763 }
Johannes Berge6a98542008-10-21 12:40:02 +0200764
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100765 if (txrc.reported_rate.idx < 0) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200766 txrc.reported_rate = tx->rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100767 if (tx->sta && ieee80211_is_data(hdr->frame_control))
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200768 tx->sta->tx_stats.last_rate = txrc.reported_rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100769 } else if (tx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200770 tx->sta->tx_stats.last_rate = txrc.reported_rate;
Johannes Berge6a98542008-10-21 12:40:02 +0200771
Felix Fietkau0d528d82013-04-22 16:14:41 +0200772 if (ratetbl)
773 return TX_CONTINUE;
774
Johannes Berge6a98542008-10-21 12:40:02 +0200775 if (unlikely(!info->control.rates[0].count))
776 info->control.rates[0].count = 1;
777
Gábor Stefanik99551512009-04-23 19:36:14 +0200778 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
779 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
780 info->control.rates[0].count = 1;
781
Johannes Berg9ae54c82008-01-31 19:48:20 +0100782 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200783}
784
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100785static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
786{
787 u16 *seq = &sta->tid_seq[tid];
788 __le16 ret = cpu_to_le16(*seq);
789
790 /* Increase the sequence number. */
791 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
792
793 return ret;
794}
795
Johannes Bergd9e8a702008-06-30 15:10:44 +0200796static ieee80211_tx_result debug_noinline
Johannes Bergf591fa52008-07-10 11:21:26 +0200797ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
798{
799 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
800 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergf591fa52008-07-10 11:21:26 +0200801 int tid;
802
Johannes Berg25d834e2008-09-12 22:52:47 +0200803 /*
804 * Packet injection may want to control the sequence
805 * number, if we have no matching interface then we
806 * neither assign one ourselves nor ask the driver to.
807 */
Johannes Berg5061b0c2009-07-14 00:33:34 +0200808 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
Johannes Berg25d834e2008-09-12 22:52:47 +0200809 return TX_CONTINUE;
810
Johannes Bergf591fa52008-07-10 11:21:26 +0200811 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
812 return TX_CONTINUE;
813
814 if (ieee80211_hdrlen(hdr->frame_control) < 24)
815 return TX_CONTINUE;
816
Johannes Berg49a59542011-09-29 16:04:41 +0200817 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
818 return TX_CONTINUE;
819
Johannes Berg94778282008-10-10 13:21:59 +0200820 /*
821 * Anything but QoS data that has a sequence number field
822 * (is long enough) gets a sequence number from the global
Bob Copelandc4c205f2013-08-23 09:35:38 -0400823 * counter. QoS data frames with a multicast destination
824 * also use the global counter (802.11-2012 9.3.2.10).
Johannes Berg94778282008-10-10 13:21:59 +0200825 */
Bob Copelandc4c205f2013-08-23 09:35:38 -0400826 if (!ieee80211_is_data_qos(hdr->frame_control) ||
827 is_multicast_ether_addr(hdr->addr1)) {
Johannes Bergb9771d42018-05-28 15:47:41 +0200828 if (tx->flags & IEEE80211_TX_NO_SEQNO)
829 return TX_CONTINUE;
Johannes Berg94778282008-10-10 13:21:59 +0200830 /* driver should assign sequence number */
Johannes Bergf591fa52008-07-10 11:21:26 +0200831 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
Johannes Berg94778282008-10-10 13:21:59 +0200832 /* for pure STA mode without beacons, we can do it */
833 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
834 tx->sdata->sequence_number += 0x10;
Johannes Berg79c892b2014-11-21 14:26:31 +0100835 if (tx->sta)
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200836 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200837 return TX_CONTINUE;
838 }
839
840 /*
841 * This should be true for injected/management frames only, for
842 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
843 * above since they are not QoS-data frames.
844 */
845 if (!tx->sta)
846 return TX_CONTINUE;
847
848 /* include per-STA, per-TID sequence counter */
Sara Sharona1f2ba04c2018-02-19 14:48:40 +0200849 tid = ieee80211_get_tid(hdr);
Johannes Berge5a9f8d2015-10-16 17:54:47 +0200850 tx->sta->tx_stats.msdu[tid]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200851
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +0200852 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
Johannes Bergf591fa52008-07-10 11:21:26 +0200853
854 return TX_CONTINUE;
855}
856
Johannes Berg252b86c2011-11-16 15:28:55 +0100857static int ieee80211_fragment(struct ieee80211_tx_data *tx,
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100858 struct sk_buff *skb, int hdrlen,
859 int frag_threshold)
860{
Johannes Berg252b86c2011-11-16 15:28:55 +0100861 struct ieee80211_local *local = tx->local;
Johannes Berga1a3fce2011-11-16 15:28:56 +0100862 struct ieee80211_tx_info *info;
Johannes Berg252b86c2011-11-16 15:28:55 +0100863 struct sk_buff *tmp;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
867
868 if (WARN_ON(rem < 0))
869 return -EINVAL;
870
Johannes Berg252b86c2011-11-16 15:28:55 +0100871 /* first fragment was already added to queue by caller */
872
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100873 while (rem) {
874 int fraglen = per_fragm;
875
876 if (fraglen > rem)
877 fraglen = rem;
878 rem -= fraglen;
879 tmp = dev_alloc_skb(local->tx_headroom +
880 frag_threshold +
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200881 tx->sdata->encrypt_headroom +
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100882 IEEE80211_ENCRYPT_TAILROOM);
883 if (!tmp)
884 return -ENOMEM;
Johannes Berg252b86c2011-11-16 15:28:55 +0100885
886 __skb_queue_tail(&tx->skbs, tmp);
887
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200888 skb_reserve(tmp,
889 local->tx_headroom + tx->sdata->encrypt_headroom);
890
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100891 /* copy control information */
892 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
Johannes Berga1a3fce2011-11-16 15:28:56 +0100893
894 info = IEEE80211_SKB_CB(tmp);
895 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
896 IEEE80211_TX_CTL_FIRST_FRAGMENT);
897
898 if (rem)
899 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
900
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100901 skb_copy_queue_mapping(tmp, skb);
902 tmp->priority = skb->priority;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100903 tmp->dev = skb->dev;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100904
905 /* copy header and data */
Johannes Berg59ae1d12017-06-16 14:29:20 +0200906 skb_put_data(tmp, skb->data, hdrlen);
907 skb_put_data(tmp, skb->data + pos, fraglen);
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100908
909 pos += fraglen;
910 }
911
Johannes Berg252b86c2011-11-16 15:28:55 +0100912 /* adjust first fragment's length */
Johannes Berg338f9772014-02-01 00:16:23 +0100913 skb_trim(skb, hdrlen + per_fragm);
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100914 return 0;
915}
916
Johannes Bergf591fa52008-07-10 11:21:26 +0200917static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +0200918ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
919{
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100920 struct sk_buff *skb = tx->skb;
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct ieee80211_hdr *hdr = (void *)skb->data;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200923 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100924 int hdrlen;
925 int fragnum;
Johannes Berge2454942008-05-15 12:55:28 +0200926
Johannes Berg252b86c2011-11-16 15:28:55 +0100927 /* no matter what happens, tx->skb moves to tx->skbs */
928 __skb_queue_tail(&tx->skbs, skb);
929 tx->skb = NULL;
930
Johannes Berga26eb272011-10-07 14:01:25 +0200931 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
932 return TX_CONTINUE;
933
Sara Sharonf3fe4e92016-10-18 23:12:11 +0300934 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
Johannes Berge2454942008-05-15 12:55:28 +0200935 return TX_CONTINUE;
936
Johannes Bergeefce912008-05-17 00:57:13 +0200937 /*
938 * Warn when submitting a fragmented A-MPDU frame and drop it.
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200939 * This scenario is handled in ieee80211_tx_prepare but extra
Ron Rindjunsky8d5e0d52008-06-12 15:42:29 +0300940 * caution taken here as fragmented ampdu may cause Tx stop.
Johannes Bergeefce912008-05-17 00:57:13 +0200941 */
Sujith8b30b1f2008-10-24 09:55:27 +0530942 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
Johannes Bergeefce912008-05-17 00:57:13 +0200943 return TX_DROP;
944
Harvey Harrison065e96052008-06-22 16:45:27 -0700945 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berge2454942008-05-15 12:55:28 +0200946
Johannes Berga26eb272011-10-07 14:01:25 +0200947 /* internal error, why isn't DONTFRAG set? */
Johannes Berg8ccd8f22009-04-29 23:35:56 +0200948 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100949 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200950
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100951 /*
952 * Now fragment the frame. This will allocate all the fragments and
953 * chain them (using skb as the first fragment) to skb->next.
954 * During transmission, we will remove the successfully transmitted
955 * fragments from this list. When the low-level driver rejects one
956 * of the fragments then we will simply pretend to accept the skb
957 * but store it away as pending.
958 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100959 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100960 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200961
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100962 /* update duration/seq/flags of fragments */
963 fragnum = 0;
Johannes Berg252b86c2011-11-16 15:28:55 +0100964
965 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100966 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
Johannes Berge2454942008-05-15 12:55:28 +0200967
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100968 hdr = (void *)skb->data;
969 info = IEEE80211_SKB_CB(skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200970
Johannes Berg252b86c2011-11-16 15:28:55 +0100971 if (!skb_queue_is_last(&tx->skbs, skb)) {
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100972 hdr->frame_control |= morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200973 /*
974 * No multi-rate retries for fragmented frames, that
975 * would completely throw off the NAV at other STAs.
976 */
977 info->control.rates[1].idx = -1;
978 info->control.rates[2].idx = -1;
979 info->control.rates[3].idx = -1;
Thomas Huehne3e1a0b2012-07-02 19:46:16 +0200980 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
Johannes Berge6a98542008-10-21 12:40:02 +0200981 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100982 } else {
983 hdr->frame_control &= ~morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200984 }
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100985 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
986 fragnum++;
Johannes Berg252b86c2011-11-16 15:28:55 +0100987 }
Johannes Berge2454942008-05-15 12:55:28 +0200988
989 return TX_CONTINUE;
Johannes Berge2454942008-05-15 12:55:28 +0200990}
991
Johannes Bergd9e8a702008-06-30 15:10:44 +0200992static ieee80211_tx_result debug_noinline
Johannes Bergfeff1f22009-08-10 16:01:54 +0200993ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
994{
Johannes Berg252b86c2011-11-16 15:28:55 +0100995 struct sk_buff *skb;
Johannes Berg560d2682013-02-05 10:55:21 +0100996 int ac = -1;
Johannes Bergfeff1f22009-08-10 16:01:54 +0200997
998 if (!tx->sta)
999 return TX_CONTINUE;
1000
Johannes Berg252b86c2011-11-16 15:28:55 +01001001 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg560d2682013-02-05 10:55:21 +01001002 ac = skb_get_queue_mapping(skb);
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001003 tx->sta->tx_stats.bytes[ac] += skb->len;
Johannes Berg252b86c2011-11-16 15:28:55 +01001004 }
Johannes Berg560d2682013-02-05 10:55:21 +01001005 if (ac >= 0)
Johannes Berge5a9f8d2015-10-16 17:54:47 +02001006 tx->sta->tx_stats.packets[ac]++;
Johannes Bergfeff1f22009-08-10 16:01:54 +02001007
1008 return TX_CONTINUE;
1009}
1010
1011static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +02001012ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1013{
1014 if (!tx->key)
1015 return TX_CONTINUE;
1016
Johannes Berg97359d12010-08-10 09:46:38 +02001017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berge2454942008-05-15 12:55:28 +02001020 return ieee80211_crypto_wep_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001021 case WLAN_CIPHER_SUITE_TKIP:
Johannes Berge2454942008-05-15 12:55:28 +02001022 return ieee80211_crypto_tkip_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001023 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02001024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_MIC_LEN);
1026 case WLAN_CIPHER_SUITE_CCMP_256:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_256_MIC_LEN);
Johannes Berg97359d12010-08-10 09:46:38 +02001029 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02001030 return ieee80211_crypto_aes_cmac_encrypt(tx);
Jouni Malinen56c52da2015-01-24 19:52:08 +02001031 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1032 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
Jouni Malinen8ade5382015-01-24 19:52:09 +02001033 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1034 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1035 return ieee80211_crypto_aes_gmac_encrypt(tx);
Jouni Malinen00b9cfa2015-01-24 19:52:06 +02001036 case WLAN_CIPHER_SUITE_GCMP:
1037 case WLAN_CIPHER_SUITE_GCMP_256:
1038 return ieee80211_crypto_gcmp_encrypt(tx);
Johannes Berg3ffc2a92010-08-27 14:26:52 +03001039 default:
Yoni Divinskyd32a1022012-01-16 15:18:59 +02001040 return ieee80211_crypto_hw_encrypt(tx);
Johannes Berge2454942008-05-15 12:55:28 +02001041 }
1042
Johannes Berge2454942008-05-15 12:55:28 +02001043 return TX_DROP;
1044}
1045
Johannes Bergd9e8a702008-06-30 15:10:44 +02001046static ieee80211_tx_result debug_noinline
Johannes Berg03f93c32008-06-25 14:36:27 +03001047ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1048{
Johannes Berg252b86c2011-11-16 15:28:55 +01001049 struct sk_buff *skb;
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001050 struct ieee80211_hdr *hdr;
1051 int next_len;
1052 bool group_addr;
Johannes Berg03f93c32008-06-25 14:36:27 +03001053
Johannes Berg252b86c2011-11-16 15:28:55 +01001054 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001055 hdr = (void *) skb->data;
Jouni Malinen7e0aae42009-05-19 19:25:58 +03001056 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1057 break; /* must not overwrite AID */
Johannes Berg252b86c2011-11-16 15:28:55 +01001058 if (!skb_queue_is_last(&tx->skbs, skb)) {
1059 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1060 next_len = next->len;
1061 } else
1062 next_len = 0;
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001063 group_addr = is_multicast_ether_addr(hdr->addr1);
Johannes Berg03f93c32008-06-25 14:36:27 +03001064
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001065 hdr->duration_id =
Johannes Berg252b86c2011-11-16 15:28:55 +01001066 ieee80211_duration(tx, skb, group_addr, next_len);
1067 }
Johannes Berg03f93c32008-06-25 14:36:27 +03001068
1069 return TX_CONTINUE;
1070}
1071
Johannes Berge2ebc742007-07-27 15:43:22 +02001072/* actual transmit path */
1073
Johannes Berga622ab72010-06-10 10:21:39 +02001074static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1075 struct sk_buff *skb,
1076 struct ieee80211_tx_info *info,
1077 struct tid_ampdu_tx *tid_tx,
1078 int tid)
1079{
1080 bool queued = false;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001081 bool reset_agg_timer = false;
Helmut Schaaaa454582012-03-07 17:20:30 +01001082 struct sk_buff *purge_skb = NULL;
Johannes Berga622ab72010-06-10 10:21:39 +02001083
1084 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1085 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001086 reset_agg_timer = true;
Johannes Berg0ab33702010-06-10 10:21:42 +02001087 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1088 /*
1089 * nothing -- this aggregation session is being started
1090 * but that might still fail with the driver
1091 */
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001092 } else if (!tx->sta->sta.txq[tid]) {
Johannes Berga622ab72010-06-10 10:21:39 +02001093 spin_lock(&tx->sta->lock);
1094 /*
1095 * Need to re-check now, because we may get here
1096 *
1097 * 1) in the window during which the setup is actually
1098 * already done, but not marked yet because not all
1099 * packets are spliced over to the driver pending
1100 * queue yet -- if this happened we acquire the lock
1101 * either before or after the splice happens, but
1102 * need to recheck which of these cases happened.
1103 *
1104 * 2) during session teardown, if the OPERATIONAL bit
1105 * was cleared due to the teardown but the pointer
1106 * hasn't been assigned NULL yet (or we loaded it
1107 * before it was assigned) -- in this case it may
1108 * now be NULL which means we should just let the
1109 * packet pass through because splicing the frames
1110 * back is already done.
1111 */
Johannes Berg40b275b2011-05-13 14:15:49 +02001112 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
Johannes Berga622ab72010-06-10 10:21:39 +02001113
1114 if (!tid_tx) {
1115 /* do nothing, let packet pass through */
1116 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1117 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001118 reset_agg_timer = true;
Johannes Berga622ab72010-06-10 10:21:39 +02001119 } else {
1120 queued = true;
Emmanuel Grumbachf6d46712016-03-17 16:51:42 +02001121 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1122 clear_sta_flag(tx->sta, WLAN_STA_SP);
1123 ps_dbg(tx->sta->sdata,
1124 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1125 tx->sta->sta.addr, tx->sta->sta.aid);
1126 }
Johannes Berga622ab72010-06-10 10:21:39 +02001127 info->control.vif = &tx->sdata->vif;
1128 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Emmanuel Grumbachfacde7f2016-03-17 16:51:41 +02001129 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berga622ab72010-06-10 10:21:39 +02001130 __skb_queue_tail(&tid_tx->pending, skb);
Helmut Schaaaa454582012-03-07 17:20:30 +01001131 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1132 purge_skb = __skb_dequeue(&tid_tx->pending);
Johannes Berga622ab72010-06-10 10:21:39 +02001133 }
1134 spin_unlock(&tx->sta->lock);
Helmut Schaaaa454582012-03-07 17:20:30 +01001135
1136 if (purge_skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001137 ieee80211_free_txskb(&tx->local->hw, purge_skb);
Johannes Berga622ab72010-06-10 10:21:39 +02001138 }
1139
Nikolay Martynov285fa692011-11-22 21:50:28 -05001140 /* reset session timer */
Sara Sharon914eac22018-04-20 13:49:19 +03001141 if (reset_agg_timer)
Felix Fietkau12d3952f2012-03-18 22:58:06 +01001142 tid_tx->last_tx = jiffies;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001143
Johannes Berga622ab72010-06-10 10:21:39 +02001144 return queued;
1145}
1146
Johannes Berg58d41852007-09-26 17:53:18 +02001147/*
1148 * initialises @tx
Johannes Berg7c107702015-03-20 14:18:27 +01001149 * pass %NULL for the station if unknown, a valid pointer if known
1150 * or an ERR_PTR() if the station is known not to exist
Johannes Berg58d41852007-09-26 17:53:18 +02001151 */
Johannes Berg9ae54c82008-01-31 19:48:20 +01001152static ieee80211_tx_result
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001153ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_tx_data *tx,
Johannes Berg7c107702015-03-20 14:18:27 +01001155 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001156{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001157 struct ieee80211_local *local = sdata->local;
Johannes Berg58d41852007-09-26 17:53:18 +02001158 struct ieee80211_hdr *hdr;
Johannes Berge039fa42008-05-15 12:55:29 +02001159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg68f2b512011-10-07 14:01:24 +02001160 int tid;
Johannes Berge2ebc742007-07-27 15:43:22 +02001161
1162 memset(tx, 0, sizeof(*tx));
1163 tx->skb = skb;
Johannes Berge2ebc742007-07-27 15:43:22 +02001164 tx->local = local;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001165 tx->sdata = sdata;
Johannes Berg252b86c2011-11-16 15:28:55 +01001166 __skb_queue_head_init(&tx->skbs);
Johannes Berge2ebc742007-07-27 15:43:22 +02001167
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001168 /*
1169 * If this flag is set to true anywhere, and we get here,
1170 * we are doing the needed processing, so remove the flag
1171 * now.
1172 */
1173 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1174
Johannes Berg58d41852007-09-26 17:53:18 +02001175 hdr = (struct ieee80211_hdr *) skb->data;
1176
Johannes Berg7c107702015-03-20 14:18:27 +01001177 if (likely(sta)) {
1178 if (!IS_ERR(sta))
1179 tx->sta = sta;
1180 } else {
1181 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1182 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1183 if (!tx->sta && sdata->wdev.use_4addr)
1184 return TX_DROP;
1185 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1186 IEEE80211_TX_CTL_INJECTED) ||
1187 tx->sdata->control_port_protocol == tx->skb->protocol) {
1188 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1189 }
1190 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1191 tx->sta = sta_info_get(sdata, hdr->addr1);
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001192 }
Johannes Berg58d41852007-09-26 17:53:18 +02001193
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001194 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
Johannes Berg49a59542011-09-29 16:04:41 +02001195 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001196 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1197 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001198 struct tid_ampdu_tx *tid_tx;
1199
Sara Sharona1f2ba04c2018-02-19 14:48:40 +02001200 tid = ieee80211_get_tid(hdr);
Sujith8b30b1f2008-10-24 09:55:27 +05301201
Johannes Berga622ab72010-06-10 10:21:39 +02001202 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1203 if (tid_tx) {
1204 bool queued;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001205
Johannes Berga622ab72010-06-10 10:21:39 +02001206 queued = ieee80211_tx_prep_agg(tx, skb, info,
1207 tid_tx, tid);
1208
1209 if (unlikely(queued))
1210 return TX_QUEUED;
1211 }
Sujith8b30b1f2008-10-24 09:55:27 +05301212 }
1213
Jiri Slabybadffb72007-08-28 17:01:54 -04001214 if (is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg5cf121c2008-02-25 16:27:43 +01001215 tx->flags &= ~IEEE80211_TX_UNICAST;
Johannes Berge039fa42008-05-15 12:55:29 +02001216 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Simon Wunderlich6fd67e92011-11-18 14:20:42 +01001217 } else
Johannes Berg5cf121c2008-02-25 16:27:43 +01001218 tx->flags |= IEEE80211_TX_UNICAST;
Johannes Berg58d41852007-09-26 17:53:18 +02001219
Johannes Berga26eb272011-10-07 14:01:25 +02001220 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1221 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1222 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1223 info->flags & IEEE80211_TX_CTL_AMPDU)
1224 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
Johannes Berg58d41852007-09-26 17:53:18 +02001225 }
1226
Johannes Berge2ebc742007-07-27 15:43:22 +02001227 if (!tx->sta)
Johannes Berge039fa42008-05-15 12:55:29 +02001228 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Felix Fietkauf7418bc2015-09-24 14:59:49 +02001229 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
Johannes Berge039fa42008-05-15 12:55:29 +02001230 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Felix Fietkauf7418bc2015-09-24 14:59:49 +02001231 ieee80211_check_fast_xmit(tx->sta);
1232 }
Johannes Berg58d41852007-09-26 17:53:18 +02001233
Johannes Berge039fa42008-05-15 12:55:29 +02001234 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge2ebc742007-07-27 15:43:22 +02001235
Johannes Berg9ae54c82008-01-31 19:48:20 +01001236 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +02001237}
1238
Michal Kazior80a83cf2016-05-19 10:37:48 +02001239static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1240 struct ieee80211_vif *vif,
Michal Kaziordbef5362017-01-13 13:32:51 +01001241 struct sta_info *sta,
Michal Kazior80a83cf2016-05-19 10:37:48 +02001242 struct sk_buff *skb)
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001243{
1244 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001245 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001246 struct ieee80211_txq *txq = NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001247
Felix Fietkauc3732a72016-02-28 15:19:53 +01001248 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1249 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
Michal Kazior80a83cf2016-05-19 10:37:48 +02001250 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001251
Johannes Berg0832b602018-07-03 14:47:25 +02001252 if (!ieee80211_is_data_present(hdr->frame_control))
Michal Kazior80a83cf2016-05-19 10:37:48 +02001253 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001254
Michal Kaziordbef5362017-01-13 13:32:51 +01001255 if (sta) {
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001256 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1257
Michal Kaziordbef5362017-01-13 13:32:51 +01001258 if (!sta->uploaded)
1259 return NULL;
1260
1261 txq = sta->sta.txq[tid];
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001262 } else if (vif) {
1263 txq = vif->txq;
1264 }
1265
1266 if (!txq)
Michal Kazior80a83cf2016-05-19 10:37:48 +02001267 return NULL;
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001268
Michal Kazior80a83cf2016-05-19 10:37:48 +02001269 return to_txq_info(txq);
1270}
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001271
Michal Kazior5caa3282016-05-19 10:37:51 +02001272static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1273{
1274 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1275}
1276
Michal Kazior5caa3282016-05-19 10:37:51 +02001277static u32 codel_skb_len_func(const struct sk_buff *skb)
1278{
1279 return skb->len;
1280}
1281
1282static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1283{
1284 const struct ieee80211_tx_info *info;
1285
1286 info = (const struct ieee80211_tx_info *)skb->cb;
1287 return info->control.enqueue_time;
1288}
1289
1290static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1291 void *ctx)
1292{
1293 struct ieee80211_local *local;
1294 struct txq_info *txqi;
1295 struct fq *fq;
1296 struct fq_flow *flow;
1297
1298 txqi = ctx;
1299 local = vif_to_sdata(txqi->txq.vif)->local;
1300 fq = &local->fq;
1301
1302 if (cvars == &txqi->def_cvars)
1303 flow = &txqi->def_flow;
1304 else
1305 flow = &fq->flows[cvars - local->cvars];
1306
1307 return fq_flow_dequeue(fq, flow);
1308}
1309
1310static void codel_drop_func(struct sk_buff *skb,
1311 void *ctx)
1312{
1313 struct ieee80211_local *local;
1314 struct ieee80211_hw *hw;
1315 struct txq_info *txqi;
1316
1317 txqi = ctx;
1318 local = vif_to_sdata(txqi->txq.vif)->local;
1319 hw = &local->hw;
1320
1321 ieee80211_free_txskb(hw, skb);
1322}
1323
Michal Kaziorfa962b92016-05-19 10:37:49 +02001324static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1325 struct fq_tin *tin,
1326 struct fq_flow *flow)
1327{
Michal Kazior5caa3282016-05-19 10:37:51 +02001328 struct ieee80211_local *local;
1329 struct txq_info *txqi;
1330 struct codel_vars *cvars;
1331 struct codel_params *cparams;
1332 struct codel_stats *cstats;
1333
1334 local = container_of(fq, struct ieee80211_local, fq);
1335 txqi = container_of(tin, struct txq_info, tin);
Toke Høiland-Jørgensen8d51dbb2016-09-12 15:55:43 +02001336 cstats = &txqi->cstats;
Michal Kazior5caa3282016-05-19 10:37:51 +02001337
Toke Høiland-Jørgensen484a54c2017-04-06 11:38:26 +02001338 if (txqi->txq.sta) {
1339 struct sta_info *sta = container_of(txqi->txq.sta,
1340 struct sta_info, sta);
1341 cparams = &sta->cparams;
1342 } else {
1343 cparams = &local->cparams;
1344 }
1345
Michal Kazior5caa3282016-05-19 10:37:51 +02001346 if (flow == &txqi->def_flow)
1347 cvars = &txqi->def_cvars;
1348 else
1349 cvars = &local->cvars[flow - fq->flows];
1350
1351 return codel_dequeue(txqi,
1352 &flow->backlog,
1353 cparams,
1354 cvars,
1355 cstats,
1356 codel_skb_len_func,
1357 codel_skb_time_func,
1358 codel_drop_func,
1359 codel_dequeue_func);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001360}
1361
1362static void fq_skb_free_func(struct fq *fq,
1363 struct fq_tin *tin,
1364 struct fq_flow *flow,
1365 struct sk_buff *skb)
1366{
1367 struct ieee80211_local *local;
1368
1369 local = container_of(fq, struct ieee80211_local, fq);
1370 ieee80211_free_txskb(&local->hw, skb);
1371}
1372
1373static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1374 struct fq_tin *tin,
1375 int idx,
1376 struct sk_buff *skb)
1377{
1378 struct txq_info *txqi;
1379
1380 txqi = container_of(tin, struct txq_info, tin);
1381 return &txqi->def_flow;
1382}
1383
Michal Kazior80a83cf2016-05-19 10:37:48 +02001384static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1385 struct txq_info *txqi,
1386 struct sk_buff *skb)
1387{
Michal Kaziorfa962b92016-05-19 10:37:49 +02001388 struct fq *fq = &local->fq;
1389 struct fq_tin *tin = &txqi->tin;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001390
Michal Kazior5caa3282016-05-19 10:37:51 +02001391 ieee80211_set_skb_enqueue_time(skb);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001392 fq_tin_enqueue(fq, tin, skb,
1393 fq_skb_free_func,
1394 fq_flow_get_default_func);
1395}
Michal Kazior80a83cf2016-05-19 10:37:48 +02001396
Johannes Berg2a9e2572017-10-06 11:53:33 +02001397static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1398 struct fq_flow *flow, struct sk_buff *skb,
1399 void *data)
1400{
1401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1402
1403 return info->control.vif == data;
1404}
1405
1406void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1407 struct ieee80211_sub_if_data *sdata)
1408{
1409 struct fq *fq = &local->fq;
1410 struct txq_info *txqi;
1411 struct fq_tin *tin;
1412 struct ieee80211_sub_if_data *ap;
1413
1414 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1415 return;
1416
1417 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1418
1419 if (!ap->vif.txq)
1420 return;
1421
1422 txqi = to_txq_info(ap->vif.txq);
1423 tin = &txqi->tin;
1424
1425 spin_lock_bh(&fq->lock);
1426 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1427 fq_skb_free_func);
1428 spin_unlock_bh(&fq->lock);
1429}
1430
Michal Kaziorfa962b92016-05-19 10:37:49 +02001431void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1432 struct sta_info *sta,
1433 struct txq_info *txqi, int tid)
1434{
1435 fq_tin_init(&txqi->tin);
1436 fq_flow_init(&txqi->def_flow);
Michal Kazior5caa3282016-05-19 10:37:51 +02001437 codel_vars_init(&txqi->def_cvars);
Toke Høiland-Jørgensen8d51dbb2016-09-12 15:55:43 +02001438 codel_stats_init(&txqi->cstats);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001439 __skb_queue_head_init(&txqi->frags);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001440
1441 txqi->txq.vif = &sdata->vif;
1442
1443 if (sta) {
1444 txqi->txq.sta = &sta->sta;
1445 sta->sta.txq[tid] = &txqi->txq;
1446 txqi->txq.tid = tid;
Amadeusz Sławiński731977e2017-01-24 16:42:10 +01001447 txqi->txq.ac = ieee80211_ac_from_tid(tid);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001448 } else {
1449 sdata->vif.txq = &txqi->txq;
1450 txqi->txq.tid = 0;
1451 txqi->txq.ac = IEEE80211_AC_BE;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001452 }
Michal Kaziorfa962b92016-05-19 10:37:49 +02001453}
Michal Kazior80a83cf2016-05-19 10:37:48 +02001454
Michal Kaziorfa962b92016-05-19 10:37:49 +02001455void ieee80211_txq_purge(struct ieee80211_local *local,
1456 struct txq_info *txqi)
1457{
1458 struct fq *fq = &local->fq;
1459 struct fq_tin *tin = &txqi->tin;
1460
1461 fq_tin_reset(fq, tin, fq_skb_free_func);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001462 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001463}
1464
Toke Høiland-Jørgensen2fe4a292018-05-08 13:03:50 +02001465void ieee80211_txq_set_params(struct ieee80211_local *local)
1466{
1467 if (local->hw.wiphy->txq_limit)
1468 local->fq.limit = local->hw.wiphy->txq_limit;
1469 else
1470 local->hw.wiphy->txq_limit = local->fq.limit;
1471
1472 if (local->hw.wiphy->txq_memory_limit)
1473 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1474 else
1475 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1476
1477 if (local->hw.wiphy->txq_quantum)
1478 local->fq.quantum = local->hw.wiphy->txq_quantum;
1479 else
1480 local->hw.wiphy->txq_quantum = local->fq.quantum;
1481}
1482
Michal Kaziorfa962b92016-05-19 10:37:49 +02001483int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1484{
1485 struct fq *fq = &local->fq;
1486 int ret;
Michal Kazior5caa3282016-05-19 10:37:51 +02001487 int i;
Toke Høiland-Jørgensen3ff23cd2016-09-23 21:59:11 +02001488 bool supp_vht = false;
1489 enum nl80211_band band;
Michal Kaziorfa962b92016-05-19 10:37:49 +02001490
1491 if (!local->ops->wake_tx_queue)
1492 return 0;
1493
1494 ret = fq_init(fq, 4096);
1495 if (ret)
1496 return ret;
1497
Toke Høiland-Jørgensen3ff23cd2016-09-23 21:59:11 +02001498 /*
1499 * If the hardware doesn't support VHT, it is safe to limit the maximum
1500 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1501 */
1502 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1503 struct ieee80211_supported_band *sband;
1504
1505 sband = local->hw.wiphy->bands[band];
1506 if (!sband)
1507 continue;
1508
1509 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1510 }
1511
1512 if (!supp_vht)
1513 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1514
Michal Kazior5caa3282016-05-19 10:37:51 +02001515 codel_params_init(&local->cparams);
Michal Kazior5caa3282016-05-19 10:37:51 +02001516 local->cparams.interval = MS2TIME(100);
1517 local->cparams.target = MS2TIME(20);
1518 local->cparams.ecn = true;
1519
1520 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1521 GFP_KERNEL);
1522 if (!local->cvars) {
Michal Kazior59a7c822016-06-29 14:00:34 +02001523 spin_lock_bh(&fq->lock);
Michal Kazior5caa3282016-05-19 10:37:51 +02001524 fq_reset(fq, fq_skb_free_func);
Michal Kazior59a7c822016-06-29 14:00:34 +02001525 spin_unlock_bh(&fq->lock);
Michal Kazior5caa3282016-05-19 10:37:51 +02001526 return -ENOMEM;
1527 }
1528
1529 for (i = 0; i < fq->flows_cnt; i++)
1530 codel_vars_init(&local->cvars[i]);
1531
Toke Høiland-Jørgensen2fe4a292018-05-08 13:03:50 +02001532 ieee80211_txq_set_params(local);
1533
Michal Kaziorfa962b92016-05-19 10:37:49 +02001534 return 0;
1535}
1536
1537void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1538{
1539 struct fq *fq = &local->fq;
1540
1541 if (!local->ops->wake_tx_queue)
1542 return;
1543
Michal Kazior5caa3282016-05-19 10:37:51 +02001544 kfree(local->cvars);
1545 local->cvars = NULL;
1546
Michal Kazior59a7c822016-06-29 14:00:34 +02001547 spin_lock_bh(&fq->lock);
Michal Kaziorfa962b92016-05-19 10:37:49 +02001548 fq_reset(fq, fq_skb_free_func);
Michal Kazior59a7c822016-06-29 14:00:34 +02001549 spin_unlock_bh(&fq->lock);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001550}
1551
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001552static bool ieee80211_queue_skb(struct ieee80211_local *local,
1553 struct ieee80211_sub_if_data *sdata,
1554 struct sta_info *sta,
1555 struct sk_buff *skb)
1556{
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001557 struct fq *fq = &local->fq;
1558 struct ieee80211_vif *vif;
1559 struct txq_info *txqi;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001560
1561 if (!local->ops->wake_tx_queue ||
1562 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1563 return false;
1564
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001565 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1566 sdata = container_of(sdata->bss,
1567 struct ieee80211_sub_if_data, u.ap);
1568
1569 vif = &sdata->vif;
Michal Kaziordbef5362017-01-13 13:32:51 +01001570 txqi = ieee80211_get_txq(local, vif, sta, skb);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001571
1572 if (!txqi)
1573 return false;
1574
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001575 spin_lock_bh(&fq->lock);
1576 ieee80211_txq_enqueue(local, txqi, skb);
1577 spin_unlock_bh(&fq->lock);
1578
Johannes Berge7881bd52017-12-19 10:11:54 +01001579 drv_wake_tx_queue(local, txqi);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001580
1581 return true;
1582}
1583
Johannes Berg11127e92011-11-16 16:02:47 +01001584static bool ieee80211_tx_frags(struct ieee80211_local *local,
1585 struct ieee80211_vif *vif,
1586 struct ieee80211_sta *sta,
1587 struct sk_buff_head *skbs,
1588 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001589{
Michal Kazior80a83cf2016-05-19 10:37:48 +02001590 struct ieee80211_tx_control control = {};
Johannes Berg252b86c2011-11-16 15:28:55 +01001591 struct sk_buff *skb, *tmp;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001592 unsigned long flags;
Johannes Berge2ebc742007-07-27 15:43:22 +02001593
Johannes Berg252b86c2011-11-16 15:28:55 +01001594 skb_queue_walk_safe(skbs, skb, tmp) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001595 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1596 int q = info->hw_queue;
1597
1598#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1599 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1600 __skb_unlink(skb, skbs);
Felix Fietkauc3e77242012-10-08 14:39:33 +02001601 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001602 continue;
1603 }
1604#endif
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001605
1606 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001607 if (local->queue_stop_reasons[q] ||
Johannes Berg7bb45682011-02-24 14:42:06 +01001608 (!txpending && !skb_queue_empty(&local->pending[q]))) {
Seth Forshee6c17b772013-02-11 11:21:07 -06001609 if (unlikely(info->flags &
Seth Forsheea7679ed2013-02-25 14:58:05 -06001610 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1611 if (local->queue_stop_reasons[q] &
1612 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1613 /*
1614 * Drop off-channel frames if queues
1615 * are stopped for any reason other
1616 * than off-channel operation. Never
1617 * queue them.
1618 */
1619 spin_unlock_irqrestore(
1620 &local->queue_stop_reason_lock,
1621 flags);
1622 ieee80211_purge_tx_queue(&local->hw,
1623 skbs);
1624 return true;
1625 }
1626 } else {
1627
Seth Forshee6c17b772013-02-11 11:21:07 -06001628 /*
Seth Forsheea7679ed2013-02-25 14:58:05 -06001629 * Since queue is stopped, queue up frames for
1630 * later transmission from the tx-pending
1631 * tasklet when the queue is woken again.
Seth Forshee6c17b772013-02-11 11:21:07 -06001632 */
Seth Forsheea7679ed2013-02-25 14:58:05 -06001633 if (txpending)
1634 skb_queue_splice_init(skbs,
1635 &local->pending[q]);
1636 else
1637 skb_queue_splice_tail_init(skbs,
1638 &local->pending[q]);
1639
1640 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1641 flags);
1642 return false;
Seth Forshee6c17b772013-02-11 11:21:07 -06001643 }
Johannes Berg7bb45682011-02-24 14:42:06 +01001644 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001645 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Tomas Winklerf8e79dd2008-07-24 18:46:44 +03001646
Johannes Berg11127e92011-11-16 16:02:47 +01001647 info->control.vif = vif;
Michal Kazior80a83cf2016-05-19 10:37:48 +02001648 control.sta = sta;
Johannes Bergec25acc2010-07-22 17:11:28 +02001649
Johannes Berg252b86c2011-11-16 15:28:55 +01001650 __skb_unlink(skb, skbs);
Michal Kazior80a83cf2016-05-19 10:37:48 +02001651 drv_tx(local, &control, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001652 }
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001653
Johannes Berg11127e92011-11-16 16:02:47 +01001654 return true;
1655}
1656
1657/*
1658 * Returns false if the frame couldn't be transmitted but was queued instead.
1659 */
1660static bool __ieee80211_tx(struct ieee80211_local *local,
1661 struct sk_buff_head *skbs, int led_len,
1662 struct sta_info *sta, bool txpending)
1663{
1664 struct ieee80211_tx_info *info;
1665 struct ieee80211_sub_if_data *sdata;
1666 struct ieee80211_vif *vif;
1667 struct ieee80211_sta *pubsta;
1668 struct sk_buff *skb;
1669 bool result = true;
1670 __le16 fc;
1671
1672 if (WARN_ON(skb_queue_empty(skbs)))
1673 return true;
1674
1675 skb = skb_peek(skbs);
1676 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1677 info = IEEE80211_SKB_CB(skb);
1678 sdata = vif_to_sdata(info->control.vif);
1679 if (sta && !sta->uploaded)
1680 sta = NULL;
1681
1682 if (sta)
1683 pubsta = &sta->sta;
1684 else
1685 pubsta = NULL;
1686
1687 switch (sdata->vif.type) {
1688 case NL80211_IFTYPE_MONITOR:
Aviya Erenfeldd8212182016-08-29 23:25:15 +03001689 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
Johannes Bergc82b5a72013-07-14 23:39:20 +03001690 vif = &sdata->vif;
1691 break;
1692 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001693 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001694 if (sdata) {
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001695 vif = &sdata->vif;
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001696 info->hw_queue =
1697 vif->hw_queue[skb_get_queue_mapping(skb)];
Johannes Berg30686bf2015-06-02 21:39:54 +02001698 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
Johannes Berg63b4d8b2015-11-24 15:41:50 +01001699 ieee80211_purge_tx_queue(&local->hw, skbs);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001700 return true;
1701 } else
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001702 vif = NULL;
Johannes Berg11127e92011-11-16 16:02:47 +01001703 break;
1704 case NL80211_IFTYPE_AP_VLAN:
1705 sdata = container_of(sdata->bss,
1706 struct ieee80211_sub_if_data, u.ap);
1707 /* fall through */
1708 default:
1709 vif = &sdata->vif;
1710 break;
1711 }
1712
Johannes Bergcb831b52012-07-02 15:40:18 +02001713 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1714 txpending);
Johannes Berg11127e92011-11-16 16:02:47 +01001715
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001716 ieee80211_tpt_led_trig_tx(local, fc, led_len);
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001717
Johannes Berg4db4e0a2011-11-24 14:47:36 +01001718 WARN_ON_ONCE(!skb_queue_empty(skbs));
Johannes Berg252b86c2011-11-16 15:28:55 +01001719
Johannes Berg11127e92011-11-16 16:02:47 +01001720 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001721}
1722
Johannes Berg97b045d2008-06-20 01:22:30 +02001723/*
1724 * Invoke TX handlers, return 0 on success and non-zero if the
1725 * frame was dropped or queued.
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001726 *
1727 * The handlers are split into an early and late part. The latter is everything
1728 * that can be sensitive to reordering, and will be deferred to after packets
1729 * are dequeued from the intermediate queues (when they are enabled).
Johannes Berg97b045d2008-06-20 01:22:30 +02001730 */
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001731static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
Johannes Berg97b045d2008-06-20 01:22:30 +02001732{
Johannes Berg97b045d2008-06-20 01:22:30 +02001733 ieee80211_tx_result res = TX_DROP;
Johannes Berg97b045d2008-06-20 01:22:30 +02001734
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001735#define CALL_TXH(txh) \
1736 do { \
1737 res = txh(tx); \
1738 if (res != TX_CONTINUE) \
1739 goto txh_done; \
1740 } while (0)
Johannes Berg97b045d2008-06-20 01:22:30 +02001741
Kalle Valo5c1b98a2010-01-12 10:42:46 +02001742 CALL_TXH(ieee80211_tx_h_dynamic_ps);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001743 CALL_TXH(ieee80211_tx_h_check_assoc);
1744 CALL_TXH(ieee80211_tx_h_ps_buf);
Johannes Berga621fa42010-08-27 14:26:54 +03001745 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001746 CALL_TXH(ieee80211_tx_h_select_key);
Johannes Berg30686bf2015-06-02 21:39:54 +02001747 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Johannes Bergaf65cd962009-11-17 18:18:36 +01001748 CALL_TXH(ieee80211_tx_h_rate_ctrl);
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001749
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001750 txh_done:
1751 if (unlikely(res == TX_DROP)) {
1752 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1753 if (tx->skb)
1754 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1755 else
1756 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1757 return -1;
1758 } else if (unlikely(res == TX_QUEUED)) {
1759 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1760 return -1;
1761 }
1762
1763 return 0;
1764}
1765
1766/*
1767 * Late handlers can be called while the sta lock is held. Handlers that can
1768 * cause packets to be generated will cause deadlock!
1769 */
1770static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1771{
1772 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1773 ieee80211_tx_result res = TX_CONTINUE;
1774
Johannes Bergaa5b5492011-12-02 22:08:52 +01001775 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1776 __skb_queue_tail(&tx->skbs, tx->skb);
1777 tx->skb = NULL;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001778 goto txh_done;
Johannes Bergaa5b5492011-12-02 22:08:52 +01001779 }
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001780
1781 CALL_TXH(ieee80211_tx_h_michael_mic_add);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001782 CALL_TXH(ieee80211_tx_h_sequence);
1783 CALL_TXH(ieee80211_tx_h_fragment);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001784 /* handlers after fragment must be aware of tx info fragmentation! */
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001785 CALL_TXH(ieee80211_tx_h_stats);
1786 CALL_TXH(ieee80211_tx_h_encrypt);
Johannes Berg30686bf2015-06-02 21:39:54 +02001787 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Arik Nemtsov8fd369e2011-01-31 22:29:12 +02001788 CALL_TXH(ieee80211_tx_h_calculate_duration);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001789#undef CALL_TXH
1790
1791 txh_done:
Johannes Berg97b045d2008-06-20 01:22:30 +02001792 if (unlikely(res == TX_DROP)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001793 I802_DEBUG_INC(tx->local->tx_handlers_drop);
Johannes Berg252b86c2011-11-16 15:28:55 +01001794 if (tx->skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001795 ieee80211_free_txskb(&tx->local->hw, tx->skb);
Johannes Berg252b86c2011-11-16 15:28:55 +01001796 else
Felix Fietkau1f98ab72012-11-10 03:44:14 +01001797 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
Johannes Berg97b045d2008-06-20 01:22:30 +02001798 return -1;
1799 } else if (unlikely(res == TX_QUEUED)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001800 I802_DEBUG_INC(tx->local->tx_handlers_queued);
Johannes Berg97b045d2008-06-20 01:22:30 +02001801 return -1;
1802 }
1803
1804 return 0;
1805}
1806
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001807static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1808{
1809 int r = invoke_tx_handlers_early(tx);
1810
1811 if (r)
1812 return r;
1813 return invoke_tx_handlers_late(tx);
1814}
1815
Felix Fietkau06be6b12013-10-14 18:01:00 +02001816bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1817 struct ieee80211_vif *vif, struct sk_buff *skb,
1818 int band, struct ieee80211_sta **sta)
1819{
1820 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1821 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1822 struct ieee80211_tx_data tx;
Johannes Berg88724a82015-03-01 09:10:12 +02001823 struct sk_buff *skb2;
Felix Fietkau06be6b12013-10-14 18:01:00 +02001824
Johannes Berg7c107702015-03-20 14:18:27 +01001825 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
Felix Fietkau06be6b12013-10-14 18:01:00 +02001826 return false;
1827
1828 info->band = band;
1829 info->control.vif = vif;
1830 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1831
1832 if (invoke_tx_handlers(&tx))
1833 return false;
1834
1835 if (sta) {
1836 if (tx.sta)
1837 *sta = &tx.sta->sta;
1838 else
1839 *sta = NULL;
1840 }
1841
Johannes Berg88724a82015-03-01 09:10:12 +02001842 /* this function isn't suitable for fragmented data frames */
1843 skb2 = __skb_dequeue(&tx.skbs);
1844 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1845 ieee80211_free_txskb(hw, skb2);
1846 ieee80211_purge_tx_queue(hw, &tx.skbs);
1847 return false;
1848 }
1849
Felix Fietkau06be6b12013-10-14 18:01:00 +02001850 return true;
1851}
1852EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1853
Johannes Berg7bb45682011-02-24 14:42:06 +01001854/*
1855 * Returns false if the frame couldn't be transmitted but was queued instead.
1856 */
1857static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01001858 struct sta_info *sta, struct sk_buff *skb,
Johannes Bergb9771d42018-05-28 15:47:41 +02001859 bool txpending, u32 txdata_flags)
Johannes Berge2ebc742007-07-27 15:43:22 +02001860{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001861 struct ieee80211_local *local = sdata->local;
Johannes Berg5cf121c2008-02-25 16:27:43 +01001862 struct ieee80211_tx_data tx;
Johannes Berg97b045d2008-06-20 01:22:30 +02001863 ieee80211_tx_result res_prepare;
Johannes Berge039fa42008-05-15 12:55:29 +02001864 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001865 bool result = true;
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001866 int led_len;
Johannes Berge2ebc742007-07-27 15:43:22 +02001867
Johannes Berge2ebc742007-07-27 15:43:22 +02001868 if (unlikely(skb->len < 10)) {
1869 dev_kfree_skb(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001870 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001871 }
1872
Johannes Berg58d41852007-09-26 17:53:18 +02001873 /* initialises tx */
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001874 led_len = skb->len;
Johannes Berg7c107702015-03-20 14:18:27 +01001875 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001876
Johannes Bergb9771d42018-05-28 15:47:41 +02001877 tx.flags |= txdata_flags;
1878
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001879 if (unlikely(res_prepare == TX_DROP)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001880 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg55de9082012-07-26 17:24:39 +02001881 return true;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001882 } else if (unlikely(res_prepare == TX_QUEUED)) {
Johannes Berg55de9082012-07-26 17:24:39 +02001883 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001884 }
1885
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001886 /* set up hw_queue value early */
1887 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
Johannes Berg30686bf2015-06-02 21:39:54 +02001888 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001889 info->hw_queue =
1890 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1891
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02001892 if (invoke_tx_handlers_early(&tx))
1893 return false;
1894
1895 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1896 return true;
1897
1898 if (!invoke_tx_handlers_late(&tx))
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001899 result = __ieee80211_tx(local, &tx.skbs, led_len,
1900 tx.sta, txpending);
Johannes Berg55de9082012-07-26 17:24:39 +02001901
Johannes Berg7bb45682011-02-24 14:42:06 +01001902 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001903}
1904
1905/* device xmit handlers */
1906
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301907static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
Johannes Berg23c07522008-05-29 10:38:53 +02001908 struct sk_buff *skb,
1909 int head_need, bool may_encrypt)
1910{
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301911 struct ieee80211_local *local = sdata->local;
Johannes Berg23c07522008-05-29 10:38:53 +02001912 int tail_need = 0;
1913
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301914 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
Johannes Berg23c07522008-05-29 10:38:53 +02001915 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1916 tail_need -= skb_tailroom(skb);
1917 tail_need = max_t(int, tail_need, 0);
1918 }
1919
Ido Yarivc70f59a2014-07-29 15:39:14 +03001920 if (skb_cloned(skb) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001921 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
Ido Yarivc70f59a2014-07-29 15:39:14 +03001922 !skb_clone_writable(skb, ETH_HLEN) ||
Johannes Berg17c18bf2015-03-21 15:25:43 +01001923 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
Johannes Berg23c07522008-05-29 10:38:53 +02001924 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001925 else if (head_need || tail_need)
Johannes Berg23c07522008-05-29 10:38:53 +02001926 I802_DEBUG_INC(local->tx_expand_skb_head);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001927 else
1928 return 0;
Johannes Berg23c07522008-05-29 10:38:53 +02001929
1930 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001931 wiphy_debug(local->hw.wiphy,
1932 "failed to reallocate TX buffer\n");
Johannes Berg23c07522008-05-29 10:38:53 +02001933 return -ENOMEM;
1934 }
1935
Johannes Berg23c07522008-05-29 10:38:53 +02001936 return 0;
1937}
1938
Johannes Berg7c107702015-03-20 14:18:27 +01001939void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
Johannes Bergb9771d42018-05-28 15:47:41 +02001940 struct sta_info *sta, struct sk_buff *skb,
1941 u32 txdata_flags)
Johannes Berge2ebc742007-07-27 15:43:22 +02001942{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001943 struct ieee80211_local *local = sdata->local;
Johannes Berge039fa42008-05-15 12:55:29 +02001944 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Colin Ian King11b05ba2018-02-02 16:31:42 +00001945 struct ieee80211_hdr *hdr;
Johannes Berge2ebc742007-07-27 15:43:22 +02001946 int headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001947 bool may_encrypt;
Johannes Berge2ebc742007-07-27 15:43:22 +02001948
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001949 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
Johannes Berg23c07522008-05-29 10:38:53 +02001950
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001951 headroom = local->tx_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001952 if (may_encrypt)
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001953 headroom += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001954 headroom -= skb_headroom(skb);
1955 headroom = max_t(int, 0, headroom);
1956
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301957 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001958 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001959 return;
Johannes Berge2ebc742007-07-27 15:43:22 +02001960 }
1961
Steve deRosier740c1aa2010-09-11 20:01:31 -07001962 hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berg5061b0c2009-07-14 00:33:34 +02001963 info->control.vif = &sdata->vif;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001964
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001965 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1966 if (ieee80211_is_data(hdr->frame_control) &&
1967 is_unicast_ether_addr(hdr->addr1)) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01001968 if (mesh_nexthop_resolve(sdata, skb))
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001969 return; /* skb queued: don't free */
1970 } else {
1971 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1972 }
Johannes Berg98aed9f2012-03-27 14:18:36 +02001973 }
Javier Cardonacca89492009-08-10 17:29:29 -07001974
Javier Cardona2154c81c2011-09-07 17:49:53 -07001975 ieee80211_set_qos_hdr(sdata, skb);
Johannes Bergb9771d42018-05-28 15:47:41 +02001976 ieee80211_tx(sdata, sta, skb, false, txdata_flags);
Johannes Berge2ebc742007-07-27 15:43:22 +02001977}
1978
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001979static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1980 struct sk_buff *skb)
Johannes Berg73b9f032011-10-07 14:01:26 +02001981{
1982 struct ieee80211_radiotap_iterator iterator;
1983 struct ieee80211_radiotap_header *rthdr =
1984 (struct ieee80211_radiotap_header *) skb->data;
1985 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001986 struct ieee80211_supported_band *sband =
1987 local->hw.wiphy->bands[info->band];
Johannes Berg73b9f032011-10-07 14:01:26 +02001988 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1989 NULL);
1990 u16 txflags;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001991 u16 rate = 0;
1992 bool rate_found = false;
1993 u8 rate_retries = 0;
1994 u16 rate_flags = 0;
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01001995 u8 mcs_known, mcs_flags, mcs_bw;
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01001996 u16 vht_known;
1997 u8 vht_mcs = 0, vht_nss = 0;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01001998 int i;
Johannes Berg73b9f032011-10-07 14:01:26 +02001999
2000 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2001 IEEE80211_TX_CTL_DONTFRAG;
2002
2003 /*
2004 * for every radiotap entry that is present
2005 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2006 * entries present, or -EINVAL on error)
2007 */
2008
2009 while (!ret) {
2010 ret = ieee80211_radiotap_iterator_next(&iterator);
2011
2012 if (ret)
2013 continue;
2014
2015 /* see if this argument is something we can use */
2016 switch (iterator.this_arg_index) {
2017 /*
2018 * You must take care when dereferencing iterator.this_arg
2019 * for multibyte types... the pointer is not aligned. Use
2020 * get_unaligned((type *)iterator.this_arg) to dereference
2021 * iterator.this_arg for type "type" safely on all arches.
2022 */
2023 case IEEE80211_RADIOTAP_FLAGS:
2024 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2025 /*
2026 * this indicates that the skb we have been
2027 * handed has the 32-bit FCS CRC at the end...
2028 * we should react to that by snipping it off
2029 * because it will be recomputed and added
2030 * on transmission
2031 */
2032 if (skb->len < (iterator._max_length + FCS_LEN))
2033 return false;
2034
2035 skb_trim(skb, skb->len - FCS_LEN);
2036 }
2037 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2038 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2039 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2040 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2041 break;
2042
2043 case IEEE80211_RADIOTAP_TX_FLAGS:
2044 txflags = get_unaligned_le16(iterator.this_arg);
2045 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2046 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2047 break;
2048
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002049 case IEEE80211_RADIOTAP_RATE:
2050 rate = *iterator.this_arg;
2051 rate_flags = 0;
2052 rate_found = true;
2053 break;
2054
2055 case IEEE80211_RADIOTAP_DATA_RETRIES:
2056 rate_retries = *iterator.this_arg;
2057 break;
2058
2059 case IEEE80211_RADIOTAP_MCS:
2060 mcs_known = iterator.this_arg[0];
2061 mcs_flags = iterator.this_arg[1];
2062 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2063 break;
2064
2065 rate_found = true;
2066 rate = iterator.this_arg[2];
2067 rate_flags = IEEE80211_TX_RC_MCS;
2068
2069 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2070 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2071 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2072
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01002073 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002074 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
Sven Eckelmannf66b60f2016-02-24 16:25:49 +01002075 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002076 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2077 break;
2078
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01002079 case IEEE80211_RADIOTAP_VHT:
2080 vht_known = get_unaligned_le16(iterator.this_arg);
2081 rate_found = true;
2082
2083 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2084 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2085 (iterator.this_arg[2] &
2086 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2087 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2088 if (vht_known &
2089 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2090 if (iterator.this_arg[3] == 1)
2091 rate_flags |=
2092 IEEE80211_TX_RC_40_MHZ_WIDTH;
2093 else if (iterator.this_arg[3] == 4)
2094 rate_flags |=
2095 IEEE80211_TX_RC_80_MHZ_WIDTH;
2096 else if (iterator.this_arg[3] == 11)
2097 rate_flags |=
2098 IEEE80211_TX_RC_160_MHZ_WIDTH;
2099 }
2100
2101 vht_mcs = iterator.this_arg[4] >> 4;
2102 vht_nss = iterator.this_arg[4] & 0xF;
2103 break;
2104
Johannes Berg73b9f032011-10-07 14:01:26 +02002105 /*
2106 * Please update the file
2107 * Documentation/networking/mac80211-injection.txt
2108 * when parsing new fields here.
2109 */
2110
2111 default:
2112 break;
2113 }
2114 }
2115
2116 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2117 return false;
2118
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002119 if (rate_found) {
2120 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2121
2122 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2123 info->control.rates[i].idx = -1;
2124 info->control.rates[i].flags = 0;
2125 info->control.rates[i].count = 0;
2126 }
2127
2128 if (rate_flags & IEEE80211_TX_RC_MCS) {
2129 info->control.rates[0].idx = rate;
Lorenzo Bianconi646e76b2016-02-23 15:43:35 +01002130 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2131 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2132 vht_nss);
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002133 } else {
2134 for (i = 0; i < sband->n_bitrates; i++) {
2135 if (rate * 5 != sband->bitrates[i].bitrate)
2136 continue;
2137
2138 info->control.rates[0].idx = i;
2139 break;
2140 }
2141 }
2142
Felix Fietkau07310a62016-03-02 15:54:51 +01002143 if (info->control.rates[0].idx < 0)
2144 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2145
Sven Eckelmanndfdfc2b2016-01-26 17:11:13 +01002146 info->control.rates[0].flags = rate_flags;
2147 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2148 local->hw.max_rate_tries);
2149 }
2150
Johannes Berg73b9f032011-10-07 14:01:26 +02002151 /*
2152 * remove the radiotap header
2153 * iterator->_max_length was sanity-checked against
2154 * skb->len by iterator init
2155 */
2156 skb_pull(skb, iterator._max_length);
2157
2158 return true;
2159}
2160
Stephen Hemmingerd0cf9c02009-08-31 19:50:57 +00002161netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2162 struct net_device *dev)
Johannes Berge2ebc742007-07-27 15:43:22 +02002163{
2164 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Johannes Berg55de9082012-07-26 17:24:39 +02002165 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02002166 struct ieee80211_radiotap_header *prthdr =
2167 (struct ieee80211_radiotap_header *)skb->data;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002168 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002169 struct ieee80211_hdr *hdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002170 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002171 struct cfg80211_chan_def *chandef;
Andy Green9b8a74e2007-07-27 15:43:24 +02002172 u16 len_rthdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002173 int hdrlen;
Johannes Berge2ebc742007-07-27 15:43:22 +02002174
Andy Green9b8a74e2007-07-27 15:43:24 +02002175 /* check for not even having the fixed radiotap header part */
2176 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2177 goto fail; /* too short to be possibly valid */
2178
2179 /* is it a header version we can trust to find length from? */
2180 if (unlikely(prthdr->it_version))
2181 goto fail; /* only version 0 is supported */
2182
2183 /* then there must be a radiotap header with a length we can use */
2184 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2185
2186 /* does the skb contain enough to deliver on the alleged length? */
2187 if (unlikely(skb->len < len_rthdr))
2188 goto fail; /* skb too short for claimed rt header extent */
Johannes Berge2ebc742007-07-27 15:43:22 +02002189
Johannes Berge2ebc742007-07-27 15:43:22 +02002190 /*
2191 * fix up the pointers accounting for the radiotap
2192 * header still being in there. We are being given
2193 * a precooked IEEE80211 header so no need for
2194 * normal processing
2195 */
Andy Green9b8a74e2007-07-27 15:43:24 +02002196 skb_set_mac_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02002197 /*
Andy Green9b8a74e2007-07-27 15:43:24 +02002198 * these are just fixed to the end of the rt area since we
2199 * don't have any better information and at this point, nobody cares
Johannes Berge2ebc742007-07-27 15:43:22 +02002200 */
Andy Green9b8a74e2007-07-27 15:43:24 +02002201 skb_set_network_header(skb, len_rthdr);
2202 skb_set_transport_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02002203
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002204 if (skb->len < len_rthdr + 2)
2205 goto fail;
2206
2207 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2208 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2209
2210 if (skb->len < len_rthdr + hdrlen)
2211 goto fail;
2212
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002213 /*
2214 * Initialize skb->protocol if the injected frame is a data frame
2215 * carrying a rfc1042 header
2216 */
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002217 if (ieee80211_is_data(hdr->frame_control) &&
2218 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2219 u8 *payload = (u8 *)hdr + hdrlen;
2220
Joe Perchesb203ca32012-05-08 18:56:52 +00002221 if (ether_addr_equal(payload, rfc1042_header))
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002222 skb->protocol = cpu_to_be16((payload[6] << 8) |
2223 payload[7]);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02002224 }
2225
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002226 memset(info, 0, sizeof(*info));
2227
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002228 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
Johannes Berg73b9f032011-10-07 14:01:26 +02002229 IEEE80211_TX_CTL_INJECTED;
2230
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002231 rcu_read_lock();
2232
2233 /*
2234 * We process outgoing injected frames that have a local address
2235 * we handle as though they are non-injected frames.
2236 * This code here isn't entirely correct, the local MAC address
2237 * isn't always enough to find the interface to use; for proper
2238 * VLAN/WDS support we will need a different mechanism (which
2239 * likely isn't going to be monitor interfaces).
2240 */
2241 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2242
2243 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2244 if (!ieee80211_sdata_running(tmp_sdata))
2245 continue;
2246 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2247 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2248 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2249 continue;
Joe Perchesb203ca32012-05-08 18:56:52 +00002250 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002251 sdata = tmp_sdata;
2252 break;
2253 }
2254 }
Johannes Berg7351c6b2009-11-19 01:08:30 +01002255
Johannes Berg55de9082012-07-26 17:24:39 +02002256 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2257 if (!chanctx_conf) {
2258 tmp_sdata = rcu_dereference(local->monitor_sdata);
2259 if (tmp_sdata)
2260 chanctx_conf =
2261 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2262 }
Johannes Berg55de9082012-07-26 17:24:39 +02002263
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002264 if (chanctx_conf)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002265 chandef = &chanctx_conf->def;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002266 else if (!local->use_chanctx)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002267 chandef = &local->_oper_chandef;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01002268 else
2269 goto fail_rcu;
Johannes Berg55de9082012-07-26 17:24:39 +02002270
2271 /*
2272 * Frame injection is not allowed if beaconing is not allowed
2273 * or if we need radar detection. Beaconing is usually not allowed when
2274 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2275 * Passive scan is also used in world regulatory domains where
2276 * your country is not known and as such it should be treated as
2277 * NO TX unless the channel is explicitly allowed in which case
2278 * your current regulatory domain would not have the passive scan
2279 * flag.
2280 *
2281 * Since AP mode uses monitor interfaces to inject/TX management
2282 * frames we can make AP mode the exception to this rule once it
2283 * supports radar detection as its implementation can deal with
2284 * radar detection by itself. We can do that later by adding a
2285 * monitor flag interfaces used for AP support.
2286 */
Janusz Dziedzicb4932832014-06-05 08:12:57 +02002287 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2288 sdata->vif.type))
Johannes Berg55de9082012-07-26 17:24:39 +02002289 goto fail_rcu;
2290
Johannes Berg73c4e192014-11-09 18:50:09 +02002291 info->band = chandef->chan->band;
Lorenzo Bianconi109843b02016-02-19 12:18:01 +01002292
2293 /* process and remove the injection radiotap header */
2294 if (!ieee80211_parse_tx_radiotap(local, skb))
2295 goto fail_rcu;
2296
Johannes Bergb9771d42018-05-28 15:47:41 +02002297 ieee80211_xmit(sdata, NULL, skb, 0);
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02002298 rcu_read_unlock();
2299
Johannes Berge2ebc742007-07-27 15:43:22 +02002300 return NETDEV_TX_OK;
Andy Green9b8a74e2007-07-27 15:43:24 +02002301
Johannes Berg55de9082012-07-26 17:24:39 +02002302fail_rcu:
2303 rcu_read_unlock();
Andy Green9b8a74e2007-07-27 15:43:24 +02002304fail:
2305 dev_kfree_skb(skb);
2306 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
Johannes Berge2ebc742007-07-27 15:43:22 +02002307}
2308
Johannes Berg97ffe752015-03-21 09:13:45 +01002309static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002310{
Johannes Berg97ffe752015-03-21 09:13:45 +01002311 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002312
Johannes Berg97ffe752015-03-21 09:13:45 +01002313 return ethertype == ETH_P_TDLS &&
2314 skb->len > 14 &&
2315 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2316}
2317
2318static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2319 struct sk_buff *skb,
2320 struct sta_info **sta_out)
2321{
2322 struct sta_info *sta;
2323
2324 switch (sdata->vif.type) {
2325 case NL80211_IFTYPE_AP_VLAN:
2326 sta = rcu_dereference(sdata->u.vlan.sta);
2327 if (sta) {
2328 *sta_out = sta;
2329 return 0;
2330 } else if (sdata->wdev.use_4addr) {
2331 return -ENOLINK;
2332 }
2333 /* fall through */
2334 case NL80211_IFTYPE_AP:
2335 case NL80211_IFTYPE_OCB:
2336 case NL80211_IFTYPE_ADHOC:
2337 if (is_multicast_ether_addr(skb->data)) {
2338 *sta_out = ERR_PTR(-ENOENT);
2339 return 0;
2340 }
2341 sta = sta_info_get_bss(sdata, skb->data);
2342 break;
2343 case NL80211_IFTYPE_WDS:
2344 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2345 break;
2346#ifdef CONFIG_MAC80211_MESH
2347 case NL80211_IFTYPE_MESH_POINT:
2348 /* determined much later */
2349 *sta_out = NULL;
2350 return 0;
2351#endif
2352 case NL80211_IFTYPE_STATION:
2353 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2354 sta = sta_info_get(sdata, skb->data);
Johannes Berg11d62ca2016-09-13 08:28:22 +02002355 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2356 if (test_sta_flag(sta,
2357 WLAN_STA_TDLS_PEER_AUTH)) {
Johannes Berg97ffe752015-03-21 09:13:45 +01002358 *sta_out = sta;
2359 return 0;
2360 }
2361
2362 /*
2363 * TDLS link during setup - throw out frames to
2364 * peer. Allow TDLS-setup frames to unauthorized
2365 * peers for the special case of a link teardown
2366 * after a TDLS sta is removed due to being
2367 * unreachable.
2368 */
Johannes Berg11d62ca2016-09-13 08:28:22 +02002369 if (!ieee80211_is_tdls_setup(skb))
Johannes Berg97ffe752015-03-21 09:13:45 +01002370 return -EINVAL;
2371 }
2372
2373 }
2374
2375 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2376 if (!sta)
2377 return -ENOLINK;
2378 break;
2379 default:
2380 return -EINVAL;
2381 }
2382
2383 *sta_out = sta ?: ERR_PTR(-ENOENT);
2384 return 0;
Matti Gottliebad38bfc2013-11-18 19:06:45 +02002385}
2386
Johannes Berge2ebc742007-07-27 15:43:22 +02002387/**
Johannes Berg4c9451e2014-11-09 18:50:10 +02002388 * ieee80211_build_hdr - build 802.11 header in the given frame
2389 * @sdata: virtual interface to build the header for
2390 * @skb: the skb to build the header in
Liad Kaufman24d342c2014-11-09 18:50:07 +02002391 * @info_flags: skb flags to set
Johannes Berge2ebc742007-07-27 15:43:22 +02002392 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02002393 * This function takes the skb with 802.3 header and reformats the header to
2394 * the appropriate IEEE 802.11 header based on which interface the packet is
2395 * being transmitted on.
Johannes Berge2ebc742007-07-27 15:43:22 +02002396 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02002397 * Note that this function also takes care of the TX status request and
2398 * potential unsharing of the SKB - this needs to be interleaved with the
2399 * header building.
2400 *
2401 * The function requires the read-side RCU lock held
2402 *
2403 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
Johannes Berge2ebc742007-07-27 15:43:22 +02002404 */
Johannes Berg4c9451e2014-11-09 18:50:10 +02002405static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01002406 struct sk_buff *skb, u32 info_flags,
Johannes Berg97ffe752015-03-21 09:13:45 +01002407 struct sta_info *sta)
Johannes Berge2ebc742007-07-27 15:43:22 +02002408{
Johannes Berg133b8222008-09-16 14:18:59 +02002409 struct ieee80211_local *local = sdata->local;
Felix Fietkau489ee912010-12-18 19:30:48 +01002410 struct ieee80211_tx_info *info;
Johannes Bergdcf33962012-07-30 15:11:56 +02002411 int head_need;
Harvey Harrison065e96052008-06-22 16:45:27 -07002412 u16 ethertype, hdrlen, meshhdrlen = 0;
2413 __le16 fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002414 struct ieee80211_hdr hdr;
Wey-Yi Guyff67bb82010-08-21 07:23:29 -07002415 struct ieee80211s_hdr mesh_hdr __maybe_unused;
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002416 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +02002417 const u8 *encaps_data;
2418 int encaps_len, skip_header_bytes;
Johannes Berg97ffe752015-03-21 09:13:45 +01002419 bool wme_sta = false, authorized = false;
2420 bool tdls_peer;
Johannes Berga729cff2011-11-06 14:13:34 +01002421 bool multicast;
Johannes Berga729cff2011-11-06 14:13:34 +01002422 u16 info_id = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02002423 struct ieee80211_chanctx_conf *chanctx_conf;
2424 struct ieee80211_sub_if_data *ap_sdata;
Johannes Berg57fbcce2016-04-12 15:56:15 +02002425 enum nl80211_band band;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002426 int ret;
Johannes Berge2ebc742007-07-27 15:43:22 +02002427
Johannes Berg97ffe752015-03-21 09:13:45 +01002428 if (IS_ERR(sta))
2429 sta = NULL;
2430
Johannes Berge2ebc742007-07-27 15:43:22 +02002431 /* convert Ethernet header to proper 802.11 header (based on
2432 * operation mode) */
2433 ethertype = (skb->data[12] << 8) | skb->data[13];
Harvey Harrison065e96052008-06-22 16:45:27 -07002434 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
Johannes Berge2ebc742007-07-27 15:43:22 +02002435
Johannes Berg51fb61e2007-12-19 01:31:27 +01002436 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +02002437 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg97ffe752015-03-21 09:13:45 +01002438 if (sdata->wdev.use_4addr) {
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002439 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2440 /* RA TA DA SA */
2441 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002442 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002443 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2444 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2445 hdrlen = 30;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002446 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02002447 wme_sta = sta->sta.wme;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002448 }
Johannes Berg55de9082012-07-26 17:24:39 +02002449 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2450 u.ap);
2451 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002452 if (!chanctx_conf) {
2453 ret = -ENOTCONN;
2454 goto free;
2455 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002456 band = chanctx_conf->def.chan->band;
Johannes Berg97ffe752015-03-21 09:13:45 +01002457 if (sdata->wdev.use_4addr)
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002458 break;
2459 /* fall through */
2460 case NL80211_IFTYPE_AP:
Arnd Bergmannfe801232013-01-25 14:14:33 +00002461 if (sdata->vif.type == NL80211_IFTYPE_AP)
2462 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002463 if (!chanctx_conf) {
2464 ret = -ENOTCONN;
2465 goto free;
2466 }
Harvey Harrison065e96052008-06-22 16:45:27 -07002467 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002468 /* DA BSSID SA */
2469 memcpy(hdr.addr1, skb->data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002470 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002471 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2472 hdrlen = 24;
Johannes Berg4bf88532012-11-09 11:39:59 +01002473 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002474 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002475 case NL80211_IFTYPE_WDS:
Harvey Harrison065e96052008-06-22 16:45:27 -07002476 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002477 /* RA TA DA SA */
2478 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002479 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002480 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2481 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2482 hdrlen = 30;
Johannes Berg55de9082012-07-26 17:24:39 +02002483 /*
2484 * This is the exception! WDS style interfaces are prohibited
2485 * when channel contexts are in used so this must be valid
2486 */
Karl Beldan675a0b02013-03-25 16:26:57 +01002487 band = local->hw.conf.chandef.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002488 break;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002489#ifdef CONFIG_MAC80211_MESH
Johannes Berg05c914f2008-09-11 00:01:58 +02002490 case NL80211_IFTYPE_MESH_POINT:
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002491 if (!is_multicast_ether_addr(skb->data)) {
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002492 struct sta_info *next_hop;
2493 bool mpp_lookup = true;
2494
Johannes Bergbf7cd942013-02-15 14:40:31 +01002495 mpath = mesh_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002496 if (mpath) {
2497 mpp_lookup = false;
2498 next_hop = rcu_dereference(mpath->next_hop);
2499 if (!next_hop ||
2500 !(mpath->flags & (MESH_PATH_ACTIVE |
2501 MESH_PATH_RESOLVING)))
2502 mpp_lookup = true;
2503 }
2504
Henning Roggeab1c7902016-02-03 13:58:37 +01002505 if (mpp_lookup) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01002506 mppath = mpp_path_lookup(sdata, skb->data);
Henning Roggeab1c7902016-02-03 13:58:37 +01002507 if (mppath)
2508 mppath->exp_time = jiffies;
2509 }
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002510
2511 if (mppath && mpath)
Bob Copeland2bdaf382016-02-28 20:03:56 -05002512 mesh_path_del(sdata, mpath->dst);
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002513 }
YanBo79617de2008-09-22 13:30:32 +08002514
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002515 /*
Joel A Fernandes9d525012011-01-10 00:44:23 -06002516 * Use address extension if it is a packet from
2517 * another interface or if we know the destination
2518 * is being proxied by a portal (i.e. portal address
2519 * differs from proxied address)
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002520 */
Joe Perchesb203ca32012-05-08 18:56:52 +00002521 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2522 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
Javier Cardona3c5772a2009-08-10 12:15:48 -07002523 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2524 skb->data, skb->data + ETH_ALEN);
Johannes Bergbf7cd942013-02-15 14:40:31 +01002525 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2526 NULL, NULL);
YanBo79617de2008-09-22 13:30:32 +08002527 } else {
Thomas Pedersen27f01122012-08-20 11:28:25 -07002528 /* DS -> MBSS (802.11-2012 13.11.3.3).
2529 * For unicast with unknown forwarding information,
2530 * destination might be in the MBSS or if that fails
2531 * forwarded to another mesh gate. In either case
2532 * resolution will be handled in ieee80211_xmit(), so
2533 * leave the original DA. This also works for mcast */
2534 const u8 *mesh_da = skb->data;
YanBo79617de2008-09-22 13:30:32 +08002535
Thomas Pedersen27f01122012-08-20 11:28:25 -07002536 if (mppath)
2537 mesh_da = mppath->mpp;
2538 else if (mpath)
2539 mesh_da = mpath->dst;
Thomas Pedersen27f01122012-08-20 11:28:25 -07002540
Javier Cardona3c5772a2009-08-10 12:15:48 -07002541 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
Johannes Berg47846c92009-11-25 17:46:19 +01002542 mesh_da, sdata->vif.addr);
Thomas Pedersen27f01122012-08-20 11:28:25 -07002543 if (is_multicast_ether_addr(mesh_da))
2544 /* DA TA mSA AE:SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002545 meshhdrlen = ieee80211_new_mesh_header(
2546 sdata, &mesh_hdr,
2547 skb->data + ETH_ALEN, NULL);
Javier Cardona3c5772a2009-08-10 12:15:48 -07002548 else
Thomas Pedersen27f01122012-08-20 11:28:25 -07002549 /* RA TA mDA mSA AE:DA SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002550 meshhdrlen = ieee80211_new_mesh_header(
2551 sdata, &mesh_hdr, skb->data,
2552 skb->data + ETH_ALEN);
YanBo79617de2008-09-22 13:30:32 +08002553
YanBo79617de2008-09-22 13:30:32 +08002554 }
Johannes Berg55de9082012-07-26 17:24:39 +02002555 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002556 if (!chanctx_conf) {
2557 ret = -ENOTCONN;
2558 goto free;
2559 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002560 band = chanctx_conf->def.chan->band;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002561 break;
2562#endif
Johannes Berg05c914f2008-09-11 00:01:58 +02002563 case NL80211_IFTYPE_STATION:
Johannes Berg97ffe752015-03-21 09:13:45 +01002564 /* we already did checks when looking up the RA STA */
2565 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002566
Johannes Berg97ffe752015-03-21 09:13:45 +01002567 if (tdls_peer) {
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002568 /* DA SA BSSID */
2569 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2570 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2571 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2572 hdrlen = 24;
2573 } else if (sdata->u.mgd.use_4addr &&
2574 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2575 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2576 IEEE80211_FCTL_TODS);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002577 /* RA TA DA SA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002578 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002579 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002580 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2581 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2582 hdrlen = 30;
2583 } else {
2584 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2585 /* BSSID SA DA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002586 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002587 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2588 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2589 hdrlen = 24;
2590 }
Johannes Berg55de9082012-07-26 17:24:39 +02002591 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002592 if (!chanctx_conf) {
2593 ret = -ENOTCONN;
2594 goto free;
2595 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002596 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002597 break;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002598 case NL80211_IFTYPE_OCB:
2599 /* DA SA BSSID */
2600 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2601 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2602 eth_broadcast_addr(hdr.addr3);
2603 hdrlen = 24;
2604 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002605 if (!chanctx_conf) {
2606 ret = -ENOTCONN;
2607 goto free;
2608 }
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002609 band = chanctx_conf->def.chan->band;
2610 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002611 case NL80211_IFTYPE_ADHOC:
Johannes Berge2ebc742007-07-27 15:43:22 +02002612 /* DA SA BSSID */
2613 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2614 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01002615 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002616 hdrlen = 24;
Johannes Berg55de9082012-07-26 17:24:39 +02002617 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002618 if (!chanctx_conf) {
2619 ret = -ENOTCONN;
2620 goto free;
2621 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002622 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002623 break;
2624 default:
Johannes Berg4c9451e2014-11-09 18:50:10 +02002625 ret = -EINVAL;
2626 goto free;
Johannes Berge2ebc742007-07-27 15:43:22 +02002627 }
2628
Johannes Berga729cff2011-11-06 14:13:34 +01002629 multicast = is_multicast_ether_addr(hdr.addr1);
Johannes Berge2ebc742007-07-27 15:43:22 +02002630
Johannes Berg97ffe752015-03-21 09:13:45 +01002631 /* sta is always NULL for mesh */
2632 if (sta) {
2633 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2634 wme_sta = sta->sta.wme;
2635 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2636 /* For mesh, the use of the QoS header is mandatory */
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002637 wme_sta = true;
Johannes Berge2ebc742007-07-27 15:43:22 +02002638 }
2639
Johannes Berg527871d2015-03-21 08:09:55 +01002640 /* receiver does QoS (which also means we do) use it */
2641 if (wme_sta) {
Harvey Harrison065e96052008-06-22 16:45:27 -07002642 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002643 hdrlen += 2;
2644 }
2645
2646 /*
Johannes Berg238814f2008-01-28 17:19:37 +01002647 * Drop unicast frames to unauthorised stations unless they are
2648 * EAPOL frames from the local station.
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002649 */
Johannes Berg55182e42011-10-12 17:28:21 +02002650 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002651 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
Sergey Ryazanova6ececf2013-08-30 01:35:09 +04002652 !multicast && !authorized &&
Johannes Berg55182e42011-10-12 17:28:21 +02002653 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002654 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002655#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002656 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
Johannes Berg4c9451e2014-11-09 18:50:10 +02002657 sdata->name, hdr.addr1);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002658#endif
2659
2660 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2661
Johannes Berg4c9451e2014-11-09 18:50:10 +02002662 ret = -EPERM;
2663 goto free;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002664 }
2665
Johannes Berga729cff2011-11-06 14:13:34 +01002666 if (unlikely(!multicast && skb->sk &&
2667 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002668 struct sk_buff *ack_skb = skb_clone_sk(skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002669
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002670 if (ack_skb) {
Johannes Berga729cff2011-11-06 14:13:34 +01002671 unsigned long flags;
Tejun Heo9475af62013-02-27 17:04:59 -08002672 int id;
Johannes Berga729cff2011-11-06 14:13:34 +01002673
2674 spin_lock_irqsave(&local->ack_status_lock, flags);
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002675 id = idr_alloc(&local->ack_status_frames, ack_skb,
Tejun Heo9475af62013-02-27 17:04:59 -08002676 1, 0x10000, GFP_ATOMIC);
Johannes Berga729cff2011-11-06 14:13:34 +01002677 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2678
Tejun Heo9475af62013-02-27 17:04:59 -08002679 if (id >= 0) {
Johannes Berga729cff2011-11-06 14:13:34 +01002680 info_id = id;
2681 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
Johannes Berga729cff2011-11-06 14:13:34 +01002682 } else {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002683 kfree_skb(ack_skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002684 }
Johannes Berga729cff2011-11-06 14:13:34 +01002685 }
2686 }
2687
Helmut Schaa7e244702010-12-02 18:44:09 +01002688 /*
2689 * If the skb is shared we need to obtain our own copy.
2690 */
2691 if (skb_shared(skb)) {
Johannes Berga729cff2011-11-06 14:13:34 +01002692 struct sk_buff *tmp_skb = skb;
2693
2694 /* can't happen -- skb is a clone if info_id != 0 */
2695 WARN_ON(info_id);
2696
Felix Fietkauf8a0a782010-12-18 19:30:50 +01002697 skb = skb_clone(skb, GFP_ATOMIC);
Helmut Schaa7e244702010-12-02 18:44:09 +01002698 kfree_skb(tmp_skb);
2699
Johannes Berg4c9451e2014-11-09 18:50:10 +02002700 if (!skb) {
2701 ret = -ENOMEM;
2702 goto free;
2703 }
Helmut Schaa7e244702010-12-02 18:44:09 +01002704 }
2705
Harvey Harrison065e96052008-06-22 16:45:27 -07002706 hdr.frame_control = fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002707 hdr.duration_id = 0;
2708 hdr.seq_ctrl = 0;
2709
2710 skip_header_bytes = ETH_HLEN;
2711 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2712 encaps_data = bridge_tunnel_header;
2713 encaps_len = sizeof(bridge_tunnel_header);
2714 skip_header_bytes -= 2;
Simon Hormane5c5d222013-03-28 13:38:25 +09002715 } else if (ethertype >= ETH_P_802_3_MIN) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002716 encaps_data = rfc1042_header;
2717 encaps_len = sizeof(rfc1042_header);
2718 skip_header_bytes -= 2;
2719 } else {
2720 encaps_data = NULL;
2721 encaps_len = 0;
2722 }
2723
2724 skb_pull(skb, skip_header_bytes);
Johannes Berg23c07522008-05-29 10:38:53 +02002725 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002726
Johannes Berg23c07522008-05-29 10:38:53 +02002727 /*
2728 * So we need to modify the skb header and hence need a copy of
2729 * that. The head_need variable above doesn't, so far, include
2730 * the needed header space that we don't need right away. If we
2731 * can, then we don't reallocate right now but only after the
2732 * frame arrives at the master device (if it does...)
2733 *
2734 * If we cannot, however, then we will reallocate to include all
2735 * the ever needed space. Also, if we need to reallocate it anyway,
2736 * make it big enough for everything we may ever need.
2737 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002738
David S. Miller3a5be7d2008-06-18 01:19:51 -07002739 if (head_need > 0 || skb_cloned(skb)) {
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002740 head_need += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02002741 head_need += local->tx_headroom;
2742 head_need = max_t(int, 0, head_need);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002743 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2744 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg1c963be2012-11-07 14:02:30 +01002745 skb = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002746 return ERR_PTR(-ENOMEM);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002747 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002748 }
2749
Felix Fietkaueae44302016-07-13 11:00:02 +02002750 if (encaps_data)
Johannes Berge2ebc742007-07-27 15:43:22 +02002751 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002752
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002753#ifdef CONFIG_MAC80211_MESH
Felix Fietkaueae44302016-07-13 11:00:02 +02002754 if (meshhdrlen > 0)
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002755 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002756#endif
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002757
Harvey Harrison065e96052008-06-22 16:45:27 -07002758 if (ieee80211_is_data_qos(fc)) {
Johannes Bergc29b9b92007-09-14 11:10:24 -04002759 __le16 *qos_control;
2760
Johannes Bergd58ff352017-06-16 14:29:23 +02002761 qos_control = skb_push(skb, 2);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002762 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2763 /*
2764 * Maybe we could actually set some fields here, for now just
2765 * initialise to zero to indicate no special operation.
2766 */
2767 *qos_control = 0;
2768 } else
2769 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2770
Zhang Shengjud57a5442016-03-03 01:16:56 +00002771 skb_reset_mac_header(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002772
Felix Fietkau489ee912010-12-18 19:30:48 +01002773 info = IEEE80211_SKB_CB(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002774 memset(info, 0, sizeof(*info));
2775
Johannes Berga729cff2011-11-06 14:13:34 +01002776 info->flags = info_flags;
2777 info->ack_frame_id = info_id;
Johannes Berg73c4e192014-11-09 18:50:09 +02002778 info->band = band;
Johannes Berga729cff2011-11-06 14:13:34 +01002779
Johannes Berg4c9451e2014-11-09 18:50:10 +02002780 return skb;
2781 free:
2782 kfree_skb(skb);
2783 return ERR_PTR(ret);
Johannes Berge2ebc742007-07-27 15:43:22 +02002784}
2785
Johannes Berg17c18bf2015-03-21 15:25:43 +01002786/*
2787 * fast-xmit overview
2788 *
2789 * The core idea of this fast-xmit is to remove per-packet checks by checking
2790 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2791 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2792 * much less work can be done per packet. For example, fragmentation must be
2793 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2794 * in the code here.
2795 *
2796 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2797 * header and other data to aid packet processing in ieee80211_xmit_fast().
2798 *
2799 * The most difficult part of this is that when any of these assumptions
2800 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2801 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2802 * since the per-packet code no longer checks the conditions. This is reflected
2803 * by the calls to these functions throughout the rest of the code, and must be
2804 * maintained if any of the TX path checks change.
2805 */
2806
2807void ieee80211_check_fast_xmit(struct sta_info *sta)
2808{
2809 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2810 struct ieee80211_local *local = sta->local;
2811 struct ieee80211_sub_if_data *sdata = sta->sdata;
2812 struct ieee80211_hdr *hdr = (void *)build.hdr;
2813 struct ieee80211_chanctx_conf *chanctx_conf;
2814 __le16 fc;
2815
Johannes Berg30686bf2015-06-02 21:39:54 +02002816 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002817 return;
2818
2819 /* Locking here protects both the pointer itself, and against concurrent
2820 * invocations winning data access races to, e.g., the key pointer that
2821 * is used.
2822 * Without it, the invocation of this function right after the key
2823 * pointer changes wouldn't be sufficient, as another CPU could access
2824 * the pointer, then stall, and then do the cache update after the CPU
2825 * that invalidated the key.
2826 * With the locking, such scenarios cannot happen as the check for the
2827 * key and the fast-tx assignment are done atomically, so the CPU that
2828 * modifies the key will either wait or other one will see the key
2829 * cleared/changed already.
2830 */
2831 spin_lock_bh(&sta->lock);
Johannes Berg30686bf2015-06-02 21:39:54 +02002832 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2833 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
Johannes Berg17c18bf2015-03-21 15:25:43 +01002834 sdata->vif.type == NL80211_IFTYPE_STATION)
2835 goto out;
2836
2837 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2838 goto out;
2839
2840 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2841 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
Felix Fietkauf7418bc2015-09-24 14:59:49 +02002842 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2843 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002844 goto out;
2845
2846 if (sdata->noack_map)
2847 goto out;
2848
2849 /* fast-xmit doesn't handle fragmentation at all */
Johannes Berg725b8122015-04-10 14:02:08 +02002850 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
Sara Sharonf3fe4e92016-10-18 23:12:11 +03002851 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002852 goto out;
2853
2854 rcu_read_lock();
2855 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2856 if (!chanctx_conf) {
2857 rcu_read_unlock();
2858 goto out;
2859 }
2860 build.band = chanctx_conf->def.chan->band;
2861 rcu_read_unlock();
2862
2863 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2864
2865 switch (sdata->vif.type) {
Johannes Berg3ffd8842015-04-14 10:28:37 +02002866 case NL80211_IFTYPE_ADHOC:
2867 /* DA SA BSSID */
2868 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2869 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2870 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2871 build.hdr_len = 24;
2872 break;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002873 case NL80211_IFTYPE_STATION:
2874 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2875 /* DA SA BSSID */
2876 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2877 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2878 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2879 build.hdr_len = 24;
2880 break;
2881 }
2882
2883 if (sdata->u.mgd.use_4addr) {
2884 /* non-regular ethertype cannot use the fastpath */
2885 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2886 IEEE80211_FCTL_TODS);
2887 /* RA TA DA SA */
2888 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2889 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2890 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2891 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2892 build.hdr_len = 30;
2893 break;
2894 }
2895 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2896 /* BSSID SA DA */
2897 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2898 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2899 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2900 build.hdr_len = 24;
2901 break;
2902 case NL80211_IFTYPE_AP_VLAN:
2903 if (sdata->wdev.use_4addr) {
2904 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2905 IEEE80211_FCTL_TODS);
2906 /* RA TA DA SA */
2907 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2908 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2909 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2910 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2911 build.hdr_len = 30;
2912 break;
2913 }
2914 /* fall through */
2915 case NL80211_IFTYPE_AP:
2916 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2917 /* DA BSSID SA */
2918 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2919 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2920 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2921 build.hdr_len = 24;
2922 break;
2923 default:
2924 /* not handled on fast-xmit */
2925 goto out;
2926 }
2927
2928 if (sta->sta.wme) {
2929 build.hdr_len += 2;
2930 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2931 }
2932
2933 /* We store the key here so there's no point in using rcu_dereference()
2934 * but that's fine because the code that changes the pointers will call
2935 * this function after doing so. For a single CPU that would be enough,
2936 * for multiple see the comment above.
2937 */
2938 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2939 if (!build.key)
2940 build.key = rcu_access_pointer(sdata->default_unicast_key);
2941 if (build.key) {
Johannes Berge495c242015-04-10 14:03:17 +02002942 bool gen_iv, iv_spc, mmic;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002943
2944 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2945 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
David Spinadel9de18d82017-12-01 13:50:52 +02002946 mmic = build.key->conf.flags &
2947 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
2948 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002949
2950 /* don't handle software crypto */
2951 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2952 goto out;
2953
2954 switch (build.key->conf.cipher) {
2955 case WLAN_CIPHER_SUITE_CCMP:
2956 case WLAN_CIPHER_SUITE_CCMP_256:
2957 /* add fixed key ID */
2958 if (gen_iv) {
2959 (build.hdr + build.hdr_len)[3] =
2960 0x20 | (build.key->conf.keyidx << 6);
2961 build.pn_offs = build.hdr_len;
2962 }
2963 if (gen_iv || iv_spc)
2964 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2965 break;
2966 case WLAN_CIPHER_SUITE_GCMP:
2967 case WLAN_CIPHER_SUITE_GCMP_256:
2968 /* add fixed key ID */
2969 if (gen_iv) {
2970 (build.hdr + build.hdr_len)[3] =
2971 0x20 | (build.key->conf.keyidx << 6);
2972 build.pn_offs = build.hdr_len;
2973 }
2974 if (gen_iv || iv_spc)
2975 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2976 break;
Johannes Berge495c242015-04-10 14:03:17 +02002977 case WLAN_CIPHER_SUITE_TKIP:
2978 /* cannot handle MMIC or IV generation in xmit-fast */
2979 if (mmic || gen_iv)
2980 goto out;
2981 if (iv_spc)
2982 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2983 break;
2984 case WLAN_CIPHER_SUITE_WEP40:
2985 case WLAN_CIPHER_SUITE_WEP104:
2986 /* cannot handle IV generation in fast-xmit */
2987 if (gen_iv)
2988 goto out;
2989 if (iv_spc)
2990 build.hdr_len += IEEE80211_WEP_IV_LEN;
2991 break;
2992 case WLAN_CIPHER_SUITE_AES_CMAC:
2993 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2994 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2995 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2996 WARN(1,
2997 "management cipher suite 0x%x enabled for data\n",
2998 build.key->conf.cipher);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002999 goto out;
Johannes Berge495c242015-04-10 14:03:17 +02003000 default:
3001 /* we don't know how to generate IVs for this at all */
3002 if (WARN_ON(gen_iv))
3003 goto out;
3004 /* pure hardware keys are OK, of course */
3005 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3006 break;
3007 /* cipher scheme might require space allocation */
3008 if (iv_spc &&
3009 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3010 goto out;
3011 if (iv_spc)
3012 build.hdr_len += build.key->conf.iv_len;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003013 }
3014
3015 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3016 }
3017
3018 hdr->frame_control = fc;
3019
3020 memcpy(build.hdr + build.hdr_len,
3021 rfc1042_header, sizeof(rfc1042_header));
3022 build.hdr_len += sizeof(rfc1042_header);
3023
3024 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3025 /* if the kmemdup fails, continue w/o fast_tx */
3026 if (!fast_tx)
3027 goto out;
3028
3029 out:
3030 /* we might have raced against another call to this function */
3031 old = rcu_dereference_protected(sta->fast_tx,
3032 lockdep_is_held(&sta->lock));
3033 rcu_assign_pointer(sta->fast_tx, fast_tx);
3034 if (old)
3035 kfree_rcu(old, rcu_head);
3036 spin_unlock_bh(&sta->lock);
3037}
3038
3039void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3040{
3041 struct sta_info *sta;
3042
3043 rcu_read_lock();
3044 list_for_each_entry_rcu(sta, &local->sta_list, list)
3045 ieee80211_check_fast_xmit(sta);
3046 rcu_read_unlock();
3047}
3048
3049void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3050{
3051 struct ieee80211_local *local = sdata->local;
3052 struct sta_info *sta;
3053
3054 rcu_read_lock();
3055
3056 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3057 if (sdata != sta->sdata &&
3058 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3059 continue;
3060 ieee80211_check_fast_xmit(sta);
3061 }
3062
3063 rcu_read_unlock();
3064}
3065
3066void ieee80211_clear_fast_xmit(struct sta_info *sta)
3067{
3068 struct ieee80211_fast_tx *fast_tx;
3069
3070 spin_lock_bh(&sta->lock);
3071 fast_tx = rcu_dereference_protected(sta->fast_tx,
3072 lockdep_is_held(&sta->lock));
3073 RCU_INIT_POINTER(sta->fast_tx, NULL);
3074 spin_unlock_bh(&sta->lock);
3075
3076 if (fast_tx)
3077 kfree_rcu(fast_tx, rcu_head);
3078}
3079
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003080static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3081 struct sk_buff *skb, int headroom,
3082 int *subframe_len)
3083{
3084 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3085 int padding = (4 - amsdu_len) & 3;
3086
3087 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3088 I802_DEBUG_INC(local->tx_expand_skb_head);
3089
3090 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3091 wiphy_debug(local->hw.wiphy,
3092 "failed to reallocate TX buffer\n");
3093 return false;
3094 }
3095 }
3096
3097 if (padding) {
3098 *subframe_len += padding;
Johannes Bergb080db52017-06-16 14:29:19 +02003099 skb_put_zero(skb, padding);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003100 }
3101
3102 return true;
3103}
3104
3105static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3106 struct ieee80211_fast_tx *fast_tx,
3107 struct sk_buff *skb)
3108{
3109 struct ieee80211_local *local = sdata->local;
3110 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3111 struct ieee80211_hdr *hdr;
Michael Braun06f2bb12016-10-15 13:28:18 +02003112 struct ethhdr *amsdu_hdr;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003113 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3114 int subframe_len = skb->len - hdr_len;
3115 void *data;
Michael Braun06f2bb12016-10-15 13:28:18 +02003116 u8 *qc, *h_80211_src, *h_80211_dst;
Michael Brauna3e2f4b2016-10-15 13:28:19 +02003117 const u8 *bssid;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003118
3119 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3120 return false;
3121
3122 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3123 return true;
3124
Michael Braun06f2bb12016-10-15 13:28:18 +02003125 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr),
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003126 &subframe_len))
3127 return false;
3128
Michael Braun06f2bb12016-10-15 13:28:18 +02003129 data = skb_push(skb, sizeof(*amsdu_hdr));
3130 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003131 hdr = data;
Michael Braun06f2bb12016-10-15 13:28:18 +02003132 amsdu_hdr = data + hdr_len;
3133 /* h_80211_src/dst is addr* field within hdr */
3134 h_80211_src = data + fast_tx->sa_offs;
3135 h_80211_dst = data + fast_tx->da_offs;
3136
3137 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3138 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3139 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
3140
Michael Brauna3e2f4b2016-10-15 13:28:19 +02003141 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3142 * fields needs to be changed to BSSID for A-MSDU frames depending
3143 * on FromDS/ToDS values.
3144 */
3145 switch (sdata->vif.type) {
3146 case NL80211_IFTYPE_STATION:
3147 bssid = sdata->u.mgd.bssid;
3148 break;
3149 case NL80211_IFTYPE_AP:
3150 case NL80211_IFTYPE_AP_VLAN:
3151 bssid = sdata->vif.addr;
3152 break;
3153 default:
3154 bssid = NULL;
3155 }
3156
3157 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3158 ether_addr_copy(h_80211_src, bssid);
3159
3160 if (bssid && ieee80211_has_tods(hdr->frame_control))
3161 ether_addr_copy(h_80211_dst, bssid);
3162
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003163 qc = ieee80211_get_qos_ctl(hdr);
3164 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3165
3166 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3167
3168 return true;
3169}
3170
3171static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3172 struct sta_info *sta,
3173 struct ieee80211_fast_tx *fast_tx,
3174 struct sk_buff *skb)
3175{
3176 struct ieee80211_local *local = sdata->local;
Michal Kaziorfa962b92016-05-19 10:37:49 +02003177 struct fq *fq = &local->fq;
3178 struct fq_tin *tin;
3179 struct fq_flow *flow;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003180 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3181 struct ieee80211_txq *txq = sta->sta.txq[tid];
3182 struct txq_info *txqi;
3183 struct sk_buff **frag_tail, *head;
3184 int subframe_len = skb->len - ETH_ALEN;
3185 u8 max_subframes = sta->sta.max_amsdu_subframes;
3186 int max_frags = local->hw.max_tx_fragments;
3187 int max_amsdu_len = sta->sta.max_amsdu_len;
3188 __be16 len;
3189 void *data;
3190 bool ret = false;
Michal Kaziorfa962b92016-05-19 10:37:49 +02003191 unsigned int orig_len;
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003192 int n = 1, nfrags;
3193
3194 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3195 return false;
3196
3197 if (!txq)
3198 return false;
3199
3200 txqi = to_txq_info(txq);
3201 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3202 return false;
3203
3204 if (sta->sta.max_rc_amsdu_len)
3205 max_amsdu_len = min_t(int, max_amsdu_len,
3206 sta->sta.max_rc_amsdu_len);
3207
Michal Kaziorfa962b92016-05-19 10:37:49 +02003208 spin_lock_bh(&fq->lock);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003209
Michal Kaziorfa962b92016-05-19 10:37:49 +02003210 /* TODO: Ideally aggregation should be done on dequeue to remain
3211 * responsive to environment changes.
3212 */
3213
3214 tin = &txqi->tin;
3215 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3216 head = skb_peek_tail(&flow->queue);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003217 if (!head)
3218 goto out;
3219
Michal Kaziorfa962b92016-05-19 10:37:49 +02003220 orig_len = head->len;
3221
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003222 if (skb->len + head->len > max_amsdu_len)
3223 goto out;
3224
3225 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3226 goto out;
3227
3228 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3229 nfrags += 1 + skb_shinfo(head)->nr_frags;
3230 frag_tail = &skb_shinfo(head)->frag_list;
3231 while (*frag_tail) {
3232 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3233 frag_tail = &(*frag_tail)->next;
3234 n++;
3235 }
3236
3237 if (max_subframes && n > max_subframes)
3238 goto out;
3239
3240 if (max_frags && nfrags > max_frags)
3241 goto out;
3242
3243 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3244 &subframe_len))
3245 goto out;
3246
3247 ret = true;
3248 data = skb_push(skb, ETH_ALEN + 2);
3249 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3250
3251 data += 2 * ETH_ALEN;
3252 len = cpu_to_be16(subframe_len);
3253 memcpy(data, &len, 2);
3254 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3255
3256 head->len += skb->len;
3257 head->data_len += skb->len;
3258 *frag_tail = skb;
3259
Michal Kaziorfa962b92016-05-19 10:37:49 +02003260 flow->backlog += head->len - orig_len;
3261 tin->backlog_bytes += head->len - orig_len;
3262
3263 fq_recalc_backlog(fq, tin, flow);
3264
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003265out:
Michal Kaziorfa962b92016-05-19 10:37:49 +02003266 spin_unlock_bh(&fq->lock);
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003267
3268 return ret;
3269}
3270
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003271/*
3272 * Can be called while the sta lock is held. Anything that can cause packets to
3273 * be generated will cause deadlock!
3274 */
3275static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3276 struct sta_info *sta, u8 pn_offs,
3277 struct ieee80211_key *key,
3278 struct sk_buff *skb)
3279{
3280 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3281 struct ieee80211_hdr *hdr = (void *)skb->data;
3282 u8 tid = IEEE80211_NUM_TIDS;
3283
3284 if (key)
3285 info->control.hw_key = &key->conf;
3286
3287 ieee80211_tx_stats(skb->dev, skb->len);
3288
3289 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3290 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003291 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3292 } else {
3293 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3294 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3295 sdata->sequence_number += 0x10;
3296 }
3297
3298 if (skb_shinfo(skb)->gso_size)
3299 sta->tx_stats.msdu[tid] +=
3300 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3301 else
3302 sta->tx_stats.msdu[tid]++;
3303
3304 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3305
3306 /* statistics normally done by ieee80211_tx_h_stats (but that
3307 * has to consider fragmentation, so is more complex)
3308 */
3309 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3310 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3311
3312 if (pn_offs) {
3313 u64 pn;
3314 u8 *crypto_hdr = skb->data + pn_offs;
3315
3316 switch (key->conf.cipher) {
3317 case WLAN_CIPHER_SUITE_CCMP:
3318 case WLAN_CIPHER_SUITE_CCMP_256:
3319 case WLAN_CIPHER_SUITE_GCMP:
3320 case WLAN_CIPHER_SUITE_GCMP_256:
3321 pn = atomic64_inc_return(&key->conf.tx_pn);
3322 crypto_hdr[0] = pn;
3323 crypto_hdr[1] = pn >> 8;
3324 crypto_hdr[4] = pn >> 16;
3325 crypto_hdr[5] = pn >> 24;
3326 crypto_hdr[6] = pn >> 32;
3327 crypto_hdr[7] = pn >> 40;
3328 break;
3329 }
3330 }
3331}
3332
Johannes Berg17c18bf2015-03-21 15:25:43 +01003333static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003334 struct sta_info *sta,
Johannes Berg17c18bf2015-03-21 15:25:43 +01003335 struct ieee80211_fast_tx *fast_tx,
3336 struct sk_buff *skb)
3337{
3338 struct ieee80211_local *local = sdata->local;
3339 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3340 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3341 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3342 struct ethhdr eth;
Johannes Berg35f432a2017-01-02 11:19:29 +01003343 struct ieee80211_tx_info *info;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003344 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3345 struct ieee80211_tx_data tx;
3346 ieee80211_tx_result r;
3347 struct tid_ampdu_tx *tid_tx = NULL;
3348 u8 tid = IEEE80211_NUM_TIDS;
3349
3350 /* control port protocol needs a lot of special handling */
3351 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3352 return false;
3353
3354 /* only RFC 1042 SNAP */
3355 if (ethertype < ETH_P_802_3_MIN)
3356 return false;
3357
3358 /* don't handle TX status request here either */
3359 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3360 return false;
3361
3362 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3363 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3364 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
Johannes Berg472be002015-06-09 16:45:08 +02003365 if (tid_tx) {
3366 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3367 return false;
3368 if (tid_tx->timeout)
3369 tid_tx->last_tx = jiffies;
3370 }
Johannes Berg17c18bf2015-03-21 15:25:43 +01003371 }
3372
3373 /* after this point (skb is modified) we cannot return false */
3374
3375 if (skb_shared(skb)) {
3376 struct sk_buff *tmp_skb = skb;
3377
3378 skb = skb_clone(skb, GFP_ATOMIC);
3379 kfree_skb(tmp_skb);
3380
3381 if (!skb)
3382 return true;
3383 }
3384
Felix Fietkau6e0456b2016-03-03 22:59:00 +01003385 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3386 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3387 return true;
3388
Johannes Berg17c18bf2015-03-21 15:25:43 +01003389 /* will not be crypto-handled beyond what we do here, so use false
3390 * as the may-encrypt argument for the resize to not account for
3391 * more room than we already have in 'extra_head'
3392 */
3393 if (unlikely(ieee80211_skb_resize(sdata, skb,
3394 max_t(int, extra_head + hw_headroom -
3395 skb_headroom(skb), 0),
3396 false))) {
3397 kfree_skb(skb);
3398 return true;
3399 }
3400
3401 memcpy(&eth, skb->data, ETH_HLEN - 2);
Johannes Bergd58ff352017-06-16 14:29:23 +02003402 hdr = skb_push(skb, extra_head);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003403 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3404 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3405 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3406
Johannes Berg35f432a2017-01-02 11:19:29 +01003407 info = IEEE80211_SKB_CB(skb);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003408 memset(info, 0, sizeof(*info));
3409 info->band = fast_tx->band;
3410 info->control.vif = &sdata->vif;
3411 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3412 IEEE80211_TX_CTL_DONTFRAG |
3413 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003414 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003415
Felix Fietkaua786f962016-11-04 10:27:54 +01003416 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3417 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3418 *ieee80211_get_qos_ctl(hdr) = tid;
3419 }
3420
Johannes Berg17c18bf2015-03-21 15:25:43 +01003421 __skb_queue_head_init(&tx.skbs);
3422
3423 tx.flags = IEEE80211_TX_UNICAST;
3424 tx.local = local;
3425 tx.sdata = sdata;
3426 tx.sta = sta;
3427 tx.key = fast_tx->key;
3428
Johannes Berg30686bf2015-06-02 21:39:54 +02003429 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
Johannes Berg17c18bf2015-03-21 15:25:43 +01003430 tx.skb = skb;
3431 r = ieee80211_tx_h_rate_ctrl(&tx);
3432 skb = tx.skb;
3433 tx.skb = NULL;
3434
3435 if (r != TX_CONTINUE) {
3436 if (r != TX_QUEUED)
3437 kfree_skb(skb);
3438 return true;
3439 }
3440 }
3441
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003442 if (ieee80211_queue_skb(local, sdata, sta, skb))
3443 return true;
Johannes Berg17c18bf2015-03-21 15:25:43 +01003444
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003445 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3446 fast_tx->key, skb);
Johannes Berg17c18bf2015-03-21 15:25:43 +01003447
3448 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3449 sdata = container_of(sdata->bss,
3450 struct ieee80211_sub_if_data, u.ap);
3451
3452 __skb_queue_tail(&tx.skbs, skb);
3453 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3454 return true;
3455}
3456
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003457struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3458 struct ieee80211_txq *txq)
3459{
3460 struct ieee80211_local *local = hw_to_local(hw);
3461 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3462 struct ieee80211_hdr *hdr;
3463 struct sk_buff *skb = NULL;
3464 struct fq *fq = &local->fq;
3465 struct fq_tin *tin = &txqi->tin;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003466 struct ieee80211_tx_info *info;
3467 struct ieee80211_tx_data tx;
3468 ieee80211_tx_result r;
Johannes Berg53168212017-06-22 12:20:30 +02003469 struct ieee80211_vif *vif;
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003470
3471 spin_lock_bh(&fq->lock);
3472
3473 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3474 goto out;
3475
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003476 /* Make sure fragments stay together. */
3477 skb = __skb_dequeue(&txqi->frags);
3478 if (skb)
3479 goto out;
3480
3481begin:
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003482 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3483 if (!skb)
3484 goto out;
3485
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003486 hdr = (struct ieee80211_hdr *)skb->data;
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003487 info = IEEE80211_SKB_CB(skb);
3488
3489 memset(&tx, 0, sizeof(tx));
3490 __skb_queue_head_init(&tx.skbs);
3491 tx.local = local;
3492 tx.skb = skb;
3493 tx.sdata = vif_to_sdata(info->control.vif);
3494
3495 if (txq->sta)
3496 tx.sta = container_of(txq->sta, struct sta_info, sta);
3497
3498 /*
3499 * The key can be removed while the packet was queued, so need to call
3500 * this here to get the current key.
3501 */
3502 r = ieee80211_tx_h_select_key(&tx);
3503 if (r != TX_CONTINUE) {
3504 ieee80211_free_txskb(&local->hw, skb);
3505 goto begin;
3506 }
3507
Felix Fietkauc1f4c9e2016-11-04 10:27:52 +01003508 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3509 info->flags |= IEEE80211_TX_CTL_AMPDU;
3510 else
3511 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3512
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003513 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003514 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3515 sta);
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003516 u8 pn_offs = 0;
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003517
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003518 if (tx.key &&
3519 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3520 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3521
3522 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3523 tx.key, skb);
3524 } else {
3525 if (invoke_tx_handlers_late(&tx))
3526 goto begin;
3527
3528 skb = __skb_dequeue(&tx.skbs);
3529
3530 if (!skb_queue_empty(&tx.skbs))
3531 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003532 }
3533
Johannes Berg1e1430d2016-10-04 09:22:19 +02003534 if (skb && skb_has_frag_list(skb) &&
3535 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3536 if (skb_linearize(skb)) {
3537 ieee80211_free_txskb(&local->hw, skb);
3538 goto begin;
3539 }
3540 }
3541
Johannes Berg53168212017-06-22 12:20:30 +02003542 switch (tx.sdata->vif.type) {
3543 case NL80211_IFTYPE_MONITOR:
3544 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3545 vif = &tx.sdata->vif;
3546 break;
3547 }
3548 tx.sdata = rcu_dereference(local->monitor_sdata);
3549 if (tx.sdata) {
3550 vif = &tx.sdata->vif;
3551 info->hw_queue =
3552 vif->hw_queue[skb_get_queue_mapping(skb)];
3553 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3554 ieee80211_free_txskb(&local->hw, skb);
3555 goto begin;
3556 } else {
3557 vif = NULL;
3558 }
3559 break;
3560 case NL80211_IFTYPE_AP_VLAN:
3561 tx.sdata = container_of(tx.sdata->bss,
3562 struct ieee80211_sub_if_data, u.ap);
3563 /* fall through */
3564 default:
3565 vif = &tx.sdata->vif;
3566 break;
3567 }
3568
3569 IEEE80211_SKB_CB(skb)->control.vif = vif;
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003570out:
3571 spin_unlock_bh(&fq->lock);
3572
Toke Høiland-Jørgensene0e2eff2016-09-22 19:04:19 +02003573 return skb;
3574}
3575EXPORT_SYMBOL(ieee80211_tx_dequeue);
3576
Johannes Berg4c9451e2014-11-09 18:50:10 +02003577void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3578 struct net_device *dev,
3579 u32 info_flags)
3580{
3581 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg97ffe752015-03-21 09:13:45 +01003582 struct sta_info *sta;
Johannes Berg80616c02015-04-14 14:50:41 +02003583 struct sk_buff *next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003584
3585 if (unlikely(skb->len < ETH_HLEN)) {
3586 kfree_skb(skb);
3587 return;
3588 }
3589
3590 rcu_read_lock();
3591
Johannes Berg2d981fd2015-04-10 14:10:10 +02003592 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3593 goto out_free;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003594
Johannes Berg17c18bf2015-03-21 15:25:43 +01003595 if (!IS_ERR_OR_NULL(sta)) {
3596 struct ieee80211_fast_tx *fast_tx;
3597
Toke Høiland-Jørgensen36148c22018-02-02 16:11:05 +01003598 /* We need a bit of data queued to build aggregates properly, so
3599 * instruct the TCP stack to allow more than a single ms of data
3600 * to be queued in the stack. The value is a bit-shift of 1
3601 * second, so 8 is ~4ms of queued data. Only affects local TCP
3602 * sockets.
3603 */
3604 sk_pacing_shift_update(skb->sk, 8);
3605
Johannes Berg17c18bf2015-03-21 15:25:43 +01003606 fast_tx = rcu_dereference(sta->fast_tx);
3607
3608 if (fast_tx &&
Toke Høiland-Jørgensenbb42f2d2016-09-22 19:04:20 +02003609 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
Johannes Berg17c18bf2015-03-21 15:25:43 +01003610 goto out;
3611 }
3612
Johannes Berg80616c02015-04-14 14:50:41 +02003613 if (skb_is_gso(skb)) {
3614 struct sk_buff *segs;
Johannes Berg680a0da2015-04-13 16:58:25 +02003615
Johannes Berg80616c02015-04-14 14:50:41 +02003616 segs = skb_gso_segment(skb, 0);
3617 if (IS_ERR(segs)) {
Johannes Berg2d981fd2015-04-10 14:10:10 +02003618 goto out_free;
Johannes Berg80616c02015-04-14 14:50:41 +02003619 } else if (segs) {
3620 consume_skb(skb);
3621 skb = segs;
3622 }
3623 } else {
3624 /* we cannot process non-linear frames on this path */
3625 if (skb_linearize(skb)) {
3626 kfree_skb(skb);
3627 goto out;
3628 }
3629
3630 /* the frame could be fragmented, software-encrypted, and other
3631 * things so we cannot really handle checksum offload with it -
3632 * fix it up in software before we handle anything else.
3633 */
3634 if (skb->ip_summed == CHECKSUM_PARTIAL) {
Johannes Bergf603f1f2015-05-05 15:25:33 +02003635 skb_set_transport_header(skb,
3636 skb_checksum_start_offset(skb));
Johannes Berg80616c02015-04-14 14:50:41 +02003637 if (skb_checksum_help(skb))
3638 goto out_free;
3639 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02003640 }
3641
Johannes Berg80616c02015-04-14 14:50:41 +02003642 next = skb;
3643 while (next) {
3644 skb = next;
3645 next = skb->next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003646
Johannes Berg80616c02015-04-14 14:50:41 +02003647 skb->prev = NULL;
3648 skb->next = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02003649
Johannes Berg80616c02015-04-14 14:50:41 +02003650 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3651 if (IS_ERR(skb))
3652 goto out;
3653
Johannes Berg5a490512015-04-22 17:10:38 +02003654 ieee80211_tx_stats(dev, skb->len);
Johannes Berg80616c02015-04-14 14:50:41 +02003655
Johannes Bergb9771d42018-05-28 15:47:41 +02003656 ieee80211_xmit(sdata, sta, skb, 0);
Johannes Berg80616c02015-04-14 14:50:41 +02003657 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02003658 goto out;
3659 out_free:
3660 kfree_skb(skb);
Johannes Berg4c9451e2014-11-09 18:50:10 +02003661 out:
3662 rcu_read_unlock();
3663}
3664
Michael Braunebceec82016-11-22 11:52:18 +01003665static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3666{
3667 struct ethhdr *eth;
3668 int err;
3669
3670 err = skb_ensure_writable(skb, ETH_HLEN);
3671 if (unlikely(err))
3672 return err;
3673
3674 eth = (void *)skb->data;
3675 ether_addr_copy(eth->h_dest, sta->sta.addr);
3676
3677 return 0;
3678}
3679
3680static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3681 struct net_device *dev)
3682{
3683 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3684 const struct ethhdr *eth = (void *)skb->data;
3685 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3686 __be16 ethertype;
3687
3688 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3689 return false;
3690
3691 switch (sdata->vif.type) {
3692 case NL80211_IFTYPE_AP_VLAN:
3693 if (sdata->u.vlan.sta)
3694 return false;
3695 if (sdata->wdev.use_4addr)
3696 return false;
3697 /* fall through */
3698 case NL80211_IFTYPE_AP:
3699 /* check runtime toggle for this bss */
3700 if (!sdata->bss->multicast_to_unicast)
3701 return false;
3702 break;
3703 default:
3704 return false;
3705 }
3706
3707 /* multicast to unicast conversion only for some payload */
3708 ethertype = eth->h_proto;
3709 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3710 ethertype = ethvlan->h_vlan_encapsulated_proto;
3711 switch (ethertype) {
3712 case htons(ETH_P_ARP):
3713 case htons(ETH_P_IP):
3714 case htons(ETH_P_IPV6):
3715 break;
3716 default:
3717 return false;
3718 }
3719
3720 return true;
3721}
3722
3723static void
3724ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3725 struct sk_buff_head *queue)
3726{
3727 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3728 struct ieee80211_local *local = sdata->local;
3729 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3730 struct sta_info *sta, *first = NULL;
3731 struct sk_buff *cloned_skb;
3732
3733 rcu_read_lock();
3734
3735 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3736 if (sdata != sta->sdata)
3737 /* AP-VLAN mismatch */
3738 continue;
3739 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3740 /* do not send back to source */
3741 continue;
3742 if (!first) {
3743 first = sta;
3744 continue;
3745 }
3746 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3747 if (!cloned_skb)
3748 goto multicast;
3749 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3750 dev_kfree_skb(cloned_skb);
3751 goto multicast;
3752 }
3753 __skb_queue_tail(queue, cloned_skb);
3754 }
3755
3756 if (likely(first)) {
3757 if (unlikely(ieee80211_change_da(skb, first)))
3758 goto multicast;
3759 __skb_queue_tail(queue, skb);
3760 } else {
3761 /* no STA connected, drop */
3762 kfree_skb(skb);
3763 skb = NULL;
3764 }
3765
3766 goto out;
3767multicast:
3768 __skb_queue_purge(queue);
3769 __skb_queue_tail(queue, skb);
3770out:
3771 rcu_read_unlock();
3772}
3773
Johannes Berg4c9451e2014-11-09 18:50:10 +02003774/**
3775 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3776 * @skb: packet to be sent
3777 * @dev: incoming interface
3778 *
3779 * On failure skb will be freed.
3780 */
Liad Kaufman24d342c2014-11-09 18:50:07 +02003781netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3782 struct net_device *dev)
3783{
Michael Braunebceec82016-11-22 11:52:18 +01003784 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
3785 struct sk_buff_head queue;
3786
3787 __skb_queue_head_init(&queue);
3788 ieee80211_convert_to_unicast(skb, dev, &queue);
3789 while ((skb = __skb_dequeue(&queue)))
3790 __ieee80211_subif_start_xmit(skb, dev, 0);
3791 } else {
3792 __ieee80211_subif_start_xmit(skb, dev, 0);
3793 }
3794
Liad Kaufman24d342c2014-11-09 18:50:07 +02003795 return NETDEV_TX_OK;
3796}
Johannes Berge2ebc742007-07-27 15:43:22 +02003797
Johannes Berg7528ec52014-11-09 18:50:11 +02003798struct sk_buff *
3799ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3800 struct sk_buff *skb, u32 info_flags)
3801{
3802 struct ieee80211_hdr *hdr;
3803 struct ieee80211_tx_data tx = {
3804 .local = sdata->local,
3805 .sdata = sdata,
3806 };
Johannes Berg97ffe752015-03-21 09:13:45 +01003807 struct sta_info *sta;
Johannes Berg7528ec52014-11-09 18:50:11 +02003808
3809 rcu_read_lock();
3810
Johannes Berg97ffe752015-03-21 09:13:45 +01003811 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3812 kfree_skb(skb);
3813 skb = ERR_PTR(-EINVAL);
3814 goto out;
3815 }
3816
3817 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
Johannes Berg7528ec52014-11-09 18:50:11 +02003818 if (IS_ERR(skb))
3819 goto out;
3820
3821 hdr = (void *)skb->data;
3822 tx.sta = sta_info_get(sdata, hdr->addr1);
3823 tx.skb = skb;
3824
3825 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3826 rcu_read_unlock();
3827 kfree_skb(skb);
3828 return ERR_PTR(-EINVAL);
3829 }
3830
3831out:
3832 rcu_read_unlock();
3833 return skb;
3834}
3835
Johannes Berge2530082008-05-17 00:57:14 +02003836/*
3837 * ieee80211_clear_tx_pending may not be called in a context where
3838 * it is possible that it packets could come in again.
3839 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003840void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3841{
Felix Fietkau1f98ab72012-11-10 03:44:14 +01003842 struct sk_buff *skb;
Johannes Berg2de8e0d92009-03-23 17:28:35 +01003843 int i;
Johannes Berge2ebc742007-07-27 15:43:22 +02003844
Felix Fietkau1f98ab72012-11-10 03:44:14 +01003845 for (i = 0; i < local->hw.queues; i++) {
3846 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3847 ieee80211_free_txskb(&local->hw, skb);
3848 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003849}
3850
Johannes Berg7bb45682011-02-24 14:42:06 +01003851/*
3852 * Returns false if the frame couldn't be transmitted but was queued instead,
3853 * which in this case means re-queued -- take as an indication to stop sending
3854 * more pending frames.
3855 */
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003856static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3857 struct sk_buff *skb)
3858{
3859 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3860 struct ieee80211_sub_if_data *sdata;
3861 struct sta_info *sta;
3862 struct ieee80211_hdr *hdr;
Johannes Berg7bb45682011-02-24 14:42:06 +01003863 bool result;
Johannes Berg55de9082012-07-26 17:24:39 +02003864 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003865
Johannes Berg5061b0c2009-07-14 00:33:34 +02003866 sdata = vif_to_sdata(info->control.vif);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003867
3868 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
Johannes Berg55de9082012-07-26 17:24:39 +02003869 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3870 if (unlikely(!chanctx_conf)) {
3871 dev_kfree_skb(skb);
3872 return true;
3873 }
Johannes Berg73c4e192014-11-09 18:50:09 +02003874 info->band = chanctx_conf->def.chan->band;
Johannes Bergb9771d42018-05-28 15:47:41 +02003875 result = ieee80211_tx(sdata, NULL, skb, true, 0);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003876 } else {
Johannes Berg252b86c2011-11-16 15:28:55 +01003877 struct sk_buff_head skbs;
3878
3879 __skb_queue_head_init(&skbs);
3880 __skb_queue_tail(&skbs, skb);
3881
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003882 hdr = (struct ieee80211_hdr *)skb->data;
Johannes Bergabe60632009-11-25 17:46:18 +01003883 sta = sta_info_get(sdata, hdr->addr1);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003884
Johannes Berg74e4dbf2011-11-16 15:28:57 +01003885 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003886 }
3887
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003888 return result;
3889}
3890
Johannes Berge2530082008-05-17 00:57:14 +02003891/*
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003892 * Transmit all pending packets. Called from tasklet.
Johannes Berge2530082008-05-17 00:57:14 +02003893 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003894void ieee80211_tx_pending(unsigned long data)
3895{
3896 struct ieee80211_local *local = (struct ieee80211_local *)data;
Johannes Berg2a577d92009-03-23 17:28:37 +01003897 unsigned long flags;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003898 int i;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003899 bool txok;
Johannes Berge2ebc742007-07-27 15:43:22 +02003900
Johannes Bergf0e72852009-03-23 17:28:36 +01003901 rcu_read_lock();
Johannes Berg2a577d92009-03-23 17:28:37 +01003902
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003903 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg176be722009-03-12 23:49:28 +01003904 for (i = 0; i < local->hw.queues; i++) {
Johannes Berg2a577d92009-03-23 17:28:37 +01003905 /*
3906 * If queue is stopped by something other than due to pending
3907 * frames, or we have no pending frames, proceed to next queue.
3908 */
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003909 if (local->queue_stop_reasons[i] ||
Johannes Berg2a577d92009-03-23 17:28:37 +01003910 skb_queue_empty(&local->pending[i]))
Johannes Berge2ebc742007-07-27 15:43:22 +02003911 continue;
Johannes Berge2530082008-05-17 00:57:14 +02003912
Johannes Berg2a577d92009-03-23 17:28:37 +01003913 while (!skb_queue_empty(&local->pending[i])) {
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003914 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003915 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003916
Johannes Berga7bc3762009-07-27 10:33:31 +02003917 if (WARN_ON(!info->control.vif)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02003918 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +02003919 continue;
3920 }
3921
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003922 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3923 flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003924
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003925 txok = ieee80211_tx_pending_skb(local, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003926 spin_lock_irqsave(&local->queue_stop_reason_lock,
3927 flags);
3928 if (!txok)
Johannes Berg2a577d92009-03-23 17:28:37 +01003929 break;
Johannes Berge2ebc742007-07-27 15:43:22 +02003930 }
Johannes Berg7236fe22010-03-22 13:42:43 -07003931
3932 if (skb_queue_empty(&local->pending[i]))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003933 ieee80211_propagate_queue_wake(local, i);
Johannes Berge2ebc742007-07-27 15:43:22 +02003934 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003935 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003936
Johannes Bergf0e72852009-03-23 17:28:36 +01003937 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003938}
3939
3940/* functions for drivers to get certain frames */
3941
Marco Porscheac70c12013-01-07 16:04:50 +01003942static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003943 struct ps_data *ps, struct sk_buff *skb,
3944 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02003945{
3946 u8 *pos, *tim;
3947 int aid0 = 0;
3948 int i, have_bits = 0, n1, n2;
3949
3950 /* Generate bitmap for TIM only if there are any STAs in power save
3951 * mode. */
Marco Porschd012a602012-10-10 12:39:50 -07003952 if (atomic_read(&ps->num_sta_ps) > 0)
Johannes Berge2ebc742007-07-27 15:43:22 +02003953 /* in the hope that this is faster than
3954 * checking byte-for-byte */
Weilong Chenf359d3f2013-12-18 15:44:16 +08003955 have_bits = !bitmap_empty((unsigned long *)ps->tim,
Johannes Berge2ebc742007-07-27 15:43:22 +02003956 IEEE80211_MAX_AID+1);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003957 if (!is_template) {
3958 if (ps->dtim_count == 0)
3959 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3960 else
3961 ps->dtim_count--;
3962 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003963
Johannes Berg4df864c2017-06-16 14:29:21 +02003964 tim = pos = skb_put(skb, 6);
Johannes Berge2ebc742007-07-27 15:43:22 +02003965 *pos++ = WLAN_EID_TIM;
3966 *pos++ = 4;
Marco Porschd012a602012-10-10 12:39:50 -07003967 *pos++ = ps->dtim_count;
Johannes Berg88600202012-02-13 15:17:18 +01003968 *pos++ = sdata->vif.bss_conf.dtim_period;
Johannes Berge2ebc742007-07-27 15:43:22 +02003969
Marco Porschd012a602012-10-10 12:39:50 -07003970 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
Johannes Berge2ebc742007-07-27 15:43:22 +02003971 aid0 = 1;
3972
Marco Porschd012a602012-10-10 12:39:50 -07003973 ps->dtim_bc_mc = aid0 == 1;
Christian Lamparter512119b2011-01-31 20:48:44 +02003974
Johannes Berge2ebc742007-07-27 15:43:22 +02003975 if (have_bits) {
3976 /* Find largest even number N1 so that bits numbered 1 through
3977 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3978 * (N2 + 1) x 8 through 2007 are 0. */
3979 n1 = 0;
3980 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
Marco Porschd012a602012-10-10 12:39:50 -07003981 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003982 n1 = i & 0xfe;
3983 break;
3984 }
3985 }
3986 n2 = n1;
3987 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
Marco Porschd012a602012-10-10 12:39:50 -07003988 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003989 n2 = i;
3990 break;
3991 }
3992 }
3993
3994 /* Bitmap control */
3995 *pos++ = n1 | aid0;
3996 /* Part Virt Bitmap */
Eliad Peller5220da32011-11-24 16:50:00 +02003997 skb_put(skb, n2 - n1);
Marco Porschd012a602012-10-10 12:39:50 -07003998 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
Johannes Berge2ebc742007-07-27 15:43:22 +02003999
4000 tim[1] = n2 - n1 + 4;
Johannes Berge2ebc742007-07-27 15:43:22 +02004001 } else {
4002 *pos++ = aid0; /* Bitmap control */
4003 *pos++ = 0; /* Part Virt Bitmap */
4004 }
Johannes Berge2ebc742007-07-27 15:43:22 +02004005}
4006
Marco Porscheac70c12013-01-07 16:04:50 +01004007static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004008 struct ps_data *ps, struct sk_buff *skb,
4009 bool is_template)
Marco Porscheac70c12013-01-07 16:04:50 +01004010{
4011 struct ieee80211_local *local = sdata->local;
4012
4013 /*
4014 * Not very nice, but we want to allow the driver to call
4015 * ieee80211_beacon_get() as a response to the set_tim()
4016 * callback. That, however, is already invoked under the
4017 * sta_lock to guarantee consistent and race-free update
4018 * of the tim bitmap in mac80211 and the driver.
4019 */
4020 if (local->tim_in_locked_section) {
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004021 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Marco Porscheac70c12013-01-07 16:04:50 +01004022 } else {
Johannes Berg1b917312013-02-22 12:55:01 +01004023 spin_lock_bh(&local->tim_lock);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004024 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Johannes Berg1b917312013-02-22 12:55:01 +01004025 spin_unlock_bh(&local->tim_lock);
Marco Porscheac70c12013-01-07 16:04:50 +01004026 }
4027
4028 return 0;
4029}
4030
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004031static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4032 struct beacon_data *beacon)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004033{
4034 struct probe_resp *resp;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004035 u8 *beacon_data;
4036 size_t beacon_data_len;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004037 int i;
Michal Kazioraf296bd2014-06-05 14:21:36 +02004038 u8 count = beacon->csa_current_counter;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004039
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004040 switch (sdata->vif.type) {
4041 case NL80211_IFTYPE_AP:
4042 beacon_data = beacon->tail;
4043 beacon_data_len = beacon->tail_len;
4044 break;
4045 case NL80211_IFTYPE_ADHOC:
4046 beacon_data = beacon->head;
4047 beacon_data_len = beacon->head_len;
4048 break;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07004049 case NL80211_IFTYPE_MESH_POINT:
4050 beacon_data = beacon->head;
4051 beacon_data_len = beacon->head_len;
4052 break;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004053 default:
4054 return;
4055 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004056
Michal Kazioraf296bd2014-06-05 14:21:36 +02004057 rcu_read_lock();
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004058 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02004059 resp = rcu_dereference(sdata->u.ap.probe_resp);
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004060
Michal Kazioraf296bd2014-06-05 14:21:36 +02004061 if (beacon->csa_counter_offsets[i]) {
4062 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4063 beacon_data_len)) {
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004064 rcu_read_unlock();
4065 return;
4066 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02004067
4068 beacon_data[beacon->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004069 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02004070
4071 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4072 resp->data[resp->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03004073 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02004074 rcu_read_unlock();
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004075}
4076
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004077static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4078{
4079 beacon->csa_current_counter--;
4080
4081 /* the counter should never reach 0 */
4082 WARN_ON_ONCE(!beacon->csa_current_counter);
4083
4084 return beacon->csa_current_counter;
4085}
4086
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004087u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4088{
4089 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Michal Kazioraf296bd2014-06-05 14:21:36 +02004090 struct beacon_data *beacon = NULL;
4091 u8 count = 0;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004092
Michal Kazioraf296bd2014-06-05 14:21:36 +02004093 rcu_read_lock();
4094
4095 if (sdata->vif.type == NL80211_IFTYPE_AP)
4096 beacon = rcu_dereference(sdata->u.ap.beacon);
4097 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4098 beacon = rcu_dereference(sdata->u.ibss.presp);
4099 else if (ieee80211_vif_is_mesh(&sdata->vif))
4100 beacon = rcu_dereference(sdata->u.mesh.beacon);
4101
4102 if (!beacon)
4103 goto unlock;
4104
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004105 count = __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004106
Michal Kazioraf296bd2014-06-05 14:21:36 +02004107unlock:
4108 rcu_read_unlock();
4109 return count;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004110}
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004111EXPORT_SYMBOL(ieee80211_csa_update_counter);
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004112
Gregory Greenman03737002018-04-20 13:49:24 +03004113void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
4114{
4115 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4116 struct beacon_data *beacon = NULL;
4117
4118 rcu_read_lock();
4119
4120 if (sdata->vif.type == NL80211_IFTYPE_AP)
4121 beacon = rcu_dereference(sdata->u.ap.beacon);
4122 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4123 beacon = rcu_dereference(sdata->u.ibss.presp);
4124 else if (ieee80211_vif_is_mesh(&sdata->vif))
4125 beacon = rcu_dereference(sdata->u.mesh.beacon);
4126
4127 if (!beacon)
4128 goto unlock;
4129
4130 if (counter < beacon->csa_current_counter)
4131 beacon->csa_current_counter = counter;
4132
4133unlock:
4134 rcu_read_unlock();
4135}
4136EXPORT_SYMBOL(ieee80211_csa_set_counter);
4137
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004138bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4139{
4140 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4141 struct beacon_data *beacon = NULL;
4142 u8 *beacon_data;
4143 size_t beacon_data_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004144 int ret = false;
4145
4146 if (!ieee80211_sdata_running(sdata))
4147 return false;
4148
4149 rcu_read_lock();
4150 if (vif->type == NL80211_IFTYPE_AP) {
4151 struct ieee80211_if_ap *ap = &sdata->u.ap;
4152
4153 beacon = rcu_dereference(ap->beacon);
4154 if (WARN_ON(!beacon || !beacon->tail))
4155 goto out;
4156 beacon_data = beacon->tail;
4157 beacon_data_len = beacon->tail_len;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004158 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4159 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4160
4161 beacon = rcu_dereference(ifibss->presp);
4162 if (!beacon)
4163 goto out;
4164
4165 beacon_data = beacon->head;
4166 beacon_data_len = beacon->head_len;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07004167 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4168 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4169
4170 beacon = rcu_dereference(ifmsh->beacon);
4171 if (!beacon)
4172 goto out;
4173
4174 beacon_data = beacon->head;
4175 beacon_data_len = beacon->head_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004176 } else {
4177 WARN_ON(1);
4178 goto out;
4179 }
4180
Michal Kazior10d78f22014-06-05 14:21:37 +02004181 if (!beacon->csa_counter_offsets[0])
4182 goto out;
4183
Michal Kazioraf296bd2014-06-05 14:21:36 +02004184 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004185 goto out;
4186
Michal Kazioraf296bd2014-06-05 14:21:36 +02004187 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004188 ret = true;
4189 out:
4190 rcu_read_unlock();
4191
4192 return ret;
4193}
4194EXPORT_SYMBOL(ieee80211_csa_is_complete);
4195
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004196static struct sk_buff *
4197__ieee80211_beacon_get(struct ieee80211_hw *hw,
4198 struct ieee80211_vif *vif,
4199 struct ieee80211_mutable_offsets *offs,
4200 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02004201{
4202 struct ieee80211_local *local = hw_to_local(hw);
Michal Kazioraf296bd2014-06-05 14:21:36 +02004203 struct beacon_data *beacon = NULL;
Johannes Berg9d139c82008-07-09 14:40:37 +02004204 struct sk_buff *skb = NULL;
Johannes Berge039fa42008-05-15 12:55:29 +02004205 struct ieee80211_tx_info *info;
Johannes Berge2ebc742007-07-27 15:43:22 +02004206 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg57fbcce2016-04-12 15:56:15 +02004207 enum nl80211_band band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004208 struct ieee80211_tx_rate_control txrc;
Johannes Berg55de9082012-07-26 17:24:39 +02004209 struct ieee80211_chanctx_conf *chanctx_conf;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004210 int csa_off_base = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01004211
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004212 rcu_read_lock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004213
Johannes Berg32bfd352007-12-19 01:31:26 +01004214 sdata = vif_to_sdata(vif);
Johannes Berg55de9082012-07-26 17:24:39 +02004215 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berge2ebc742007-07-27 15:43:22 +02004216
Johannes Berg55de9082012-07-26 17:24:39 +02004217 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
Felix Fietkaueb3e5542011-01-24 19:28:49 +01004218 goto out;
4219
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004220 if (offs)
4221 memset(offs, 0, sizeof(*offs));
Johannes Bergeddcbb942009-10-29 08:30:35 +01004222
Johannes Berg05c914f2008-09-11 00:01:58 +02004223 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Marco Porschd012a602012-10-10 12:39:50 -07004224 struct ieee80211_if_ap *ap = &sdata->u.ap;
Marco Porschd012a602012-10-10 12:39:50 -07004225
Michal Kazioraf296bd2014-06-05 14:21:36 +02004226 beacon = rcu_dereference(ap->beacon);
Dan Carpenter3ad97fbc2011-02-07 22:03:35 +03004227 if (beacon) {
Michal Kazior10d78f22014-06-05 14:21:37 +02004228 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004229 if (!is_template)
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004230 __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004231
4232 ieee80211_set_csa(sdata, beacon);
4233 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02004234
Johannes Berg902acc72008-02-23 15:17:19 +01004235 /*
4236 * headroom, head length,
4237 * tail length and maximum TIM length
4238 */
4239 skb = dev_alloc_skb(local->tx_headroom +
4240 beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01004241 beacon->tail_len + 256 +
4242 local->hw.extra_beacon_tailroom);
Johannes Berg902acc72008-02-23 15:17:19 +01004243 if (!skb)
4244 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004245
Johannes Berg902acc72008-02-23 15:17:19 +01004246 skb_reserve(skb, local->tx_headroom);
Johannes Berg59ae1d12017-06-16 14:29:20 +02004247 skb_put_data(skb, beacon->head, beacon->head_len);
Johannes Berg902acc72008-02-23 15:17:19 +01004248
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004249 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4250 is_template);
Johannes Berg902acc72008-02-23 15:17:19 +01004251
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004252 if (offs) {
4253 offs->tim_offset = beacon->head_len;
4254 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004255
4256 /* for AP the csa offsets are from tail */
4257 csa_off_base = skb->len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004258 }
Johannes Bergeddcbb942009-10-29 08:30:35 +01004259
Johannes Berg902acc72008-02-23 15:17:19 +01004260 if (beacon->tail)
Johannes Berg59ae1d12017-06-16 14:29:20 +02004261 skb_put_data(skb, beacon->tail,
4262 beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02004263 } else
4264 goto out;
Johannes Berg05c914f2008-09-11 00:01:58 +02004265 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg46900292009-02-15 12:44:28 +01004266 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
Johannes Berg9d139c82008-07-09 14:40:37 +02004267 struct ieee80211_hdr *hdr;
Johannes Berg902acc72008-02-23 15:17:19 +01004268
Michal Kazioraf296bd2014-06-05 14:21:36 +02004269 beacon = rcu_dereference(ifibss->presp);
4270 if (!beacon)
Johannes Berg9d139c82008-07-09 14:40:37 +02004271 goto out;
4272
Michal Kazior10d78f22014-06-05 14:21:37 +02004273 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004274 if (!is_template)
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004275 __ieee80211_csa_update_counter(beacon);
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004276
Michal Kazioraf296bd2014-06-05 14:21:36 +02004277 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004278 }
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02004279
Michal Kazioraf296bd2014-06-05 14:21:36 +02004280 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01004281 local->hw.extra_beacon_tailroom);
Johannes Berg9d139c82008-07-09 14:40:37 +02004282 if (!skb)
4283 goto out;
Johannes Bergc3ffeab2013-03-07 20:54:29 +01004284 skb_reserve(skb, local->tx_headroom);
Johannes Berg59ae1d12017-06-16 14:29:20 +02004285 skb_put_data(skb, beacon->head, beacon->head_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02004286
4287 hdr = (struct ieee80211_hdr *) skb->data;
Harvey Harrisone7827a72008-07-15 18:44:13 -07004288 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4289 IEEE80211_STYPE_BEACON);
Johannes Berg902acc72008-02-23 15:17:19 +01004290 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
Javier Cardonadbf498f2012-03-31 11:31:32 -07004291 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Johannes Berg472dbc42008-09-11 00:01:49 +02004292
Michal Kazioraf296bd2014-06-05 14:21:36 +02004293 beacon = rcu_dereference(ifmsh->beacon);
4294 if (!beacon)
Johannes Bergac1bd842011-01-18 13:45:32 +01004295 goto out;
Johannes Bergac1bd842011-01-18 13:45:32 +01004296
Michal Kazior10d78f22014-06-05 14:21:37 +02004297 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004298 if (!is_template)
4299 /* TODO: For mesh csa_counter is in TU, so
4300 * decrementing it by one isn't correct, but
4301 * for now we leave it consistent with overall
4302 * mac80211's behavior.
4303 */
Wojciech Dubowike996ec22015-06-10 13:06:53 +02004304 __ieee80211_csa_update_counter(beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004305
Michal Kazioraf296bd2014-06-05 14:21:36 +02004306 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004307 }
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07004308
Javier Cardonadbf498f2012-03-31 11:31:32 -07004309 if (ifmsh->sync_ops)
Masashi Honma445cd452016-12-08 10:15:51 +09004310 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
Javier Cardonadbf498f2012-03-31 11:31:32 -07004311
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -07004312 skb = dev_alloc_skb(local->tx_headroom +
Michal Kazioraf296bd2014-06-05 14:21:36 +02004313 beacon->head_len +
Marco Porsch3f52b7e2013-01-30 18:14:08 +01004314 256 + /* TIM IE */
Michal Kazioraf296bd2014-06-05 14:21:36 +02004315 beacon->tail_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01004316 local->hw.extra_beacon_tailroom);
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01004317 if (!skb)
4318 goto out;
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08004319 skb_reserve(skb, local->tx_headroom);
Johannes Berg59ae1d12017-06-16 14:29:20 +02004320 skb_put_data(skb, beacon->head, beacon->head_len);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004321 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4322
4323 if (offs) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02004324 offs->tim_offset = beacon->head_len;
4325 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004326 }
4327
Johannes Berg59ae1d12017-06-16 14:29:20 +02004328 skb_put_data(skb, beacon->tail, beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02004329 } else {
4330 WARN_ON(1);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004331 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02004332 }
4333
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004334 /* CSA offsets */
Michal Kazioraf296bd2014-06-05 14:21:36 +02004335 if (offs && beacon) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004336 int i;
4337
4338 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02004339 u16 csa_off = beacon->csa_counter_offsets[i];
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03004340
4341 if (!csa_off)
4342 continue;
4343
4344 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4345 }
4346 }
4347
Johannes Berg4bf88532012-11-09 11:39:59 +01004348 band = chanctx_conf->def.chan->band;
Johannes Berg55de9082012-07-26 17:24:39 +02004349
Johannes Berge039fa42008-05-15 12:55:29 +02004350 info = IEEE80211_SKB_CB(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02004351
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004352 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004353 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Berge039fa42008-05-15 12:55:29 +02004354 info->band = band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004355
4356 memset(&txrc, 0, sizeof(txrc));
4357 txrc.hw = hw;
Johannes Berge31583c2012-07-26 14:07:46 +02004358 txrc.sband = local->hw.wiphy->bands[band];
Jouni Malinene00cfce2009-12-29 12:59:19 +02004359 txrc.bss_conf = &sdata->vif.bss_conf;
4360 txrc.skb = skb;
4361 txrc.reported_rate.idx = -1;
Jouni Malinen37eb0b12010-01-06 13:09:08 +02004362 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
Felix Fietkau8f0729b2010-11-11 15:07:23 +01004363 txrc.bss = true;
Jouni Malinene00cfce2009-12-29 12:59:19 +02004364 rate_control_get_rate(sdata, NULL, &txrc);
Johannes Berge039fa42008-05-15 12:55:29 +02004365
4366 info->control.vif = vif;
Johannes Bergf591fa52008-07-10 11:21:26 +02004367
John W. Linvillea472e712010-05-06 14:45:17 -04004368 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4369 IEEE80211_TX_CTL_ASSIGN_SEQ |
4370 IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge6a98542008-10-21 12:40:02 +02004371 out:
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004372 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004373 return skb;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004374
4375}
4376
4377struct sk_buff *
4378ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4379 struct ieee80211_vif *vif,
4380 struct ieee80211_mutable_offsets *offs)
4381{
4382 return __ieee80211_beacon_get(hw, vif, offs, true);
4383}
4384EXPORT_SYMBOL(ieee80211_beacon_get_template);
4385
4386struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4387 struct ieee80211_vif *vif,
4388 u16 *tim_offset, u16 *tim_length)
4389{
4390 struct ieee80211_mutable_offsets offs = {};
4391 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
Helmut Schaa35afa582015-09-09 09:46:32 +02004392 struct sk_buff *copy;
4393 struct ieee80211_supported_band *sband;
4394 int shift;
4395
4396 if (!bcn)
4397 return bcn;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004398
4399 if (tim_offset)
4400 *tim_offset = offs.tim_offset;
4401
4402 if (tim_length)
4403 *tim_length = offs.tim_length;
4404
Helmut Schaa35afa582015-09-09 09:46:32 +02004405 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4406 !hw_to_local(hw)->monitors)
4407 return bcn;
4408
4409 /* send a copy to monitor interfaces */
4410 copy = skb_copy(bcn, GFP_ATOMIC);
4411 if (!copy)
4412 return bcn;
4413
4414 shift = ieee80211_vif_get_shift(vif);
Mohammed Shafi Shajakhan21a8e9d2017-04-27 12:45:38 +05304415 sband = ieee80211_get_sband(vif_to_sdata(vif));
4416 if (!sband)
4417 return bcn;
4418
Helmut Schaa35afa582015-09-09 09:46:32 +02004419 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4420
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03004421 return bcn;
Johannes Berge2ebc742007-07-27 15:43:22 +02004422}
Johannes Bergeddcbb942009-10-29 08:30:35 +01004423EXPORT_SYMBOL(ieee80211_beacon_get_tim);
Johannes Berge2ebc742007-07-27 15:43:22 +02004424
Arik Nemtsov02945822011-11-10 11:28:57 +02004425struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4426 struct ieee80211_vif *vif)
4427{
4428 struct ieee80211_if_ap *ap = NULL;
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004429 struct sk_buff *skb = NULL;
4430 struct probe_resp *presp = NULL;
Arik Nemtsov02945822011-11-10 11:28:57 +02004431 struct ieee80211_hdr *hdr;
4432 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4433
4434 if (sdata->vif.type != NL80211_IFTYPE_AP)
4435 return NULL;
4436
4437 rcu_read_lock();
4438
4439 ap = &sdata->u.ap;
4440 presp = rcu_dereference(ap->probe_resp);
4441 if (!presp)
4442 goto out;
4443
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004444 skb = dev_alloc_skb(presp->len);
Arik Nemtsov02945822011-11-10 11:28:57 +02004445 if (!skb)
4446 goto out;
4447
Johannes Berg59ae1d12017-06-16 14:29:20 +02004448 skb_put_data(skb, presp->data, presp->len);
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03004449
Arik Nemtsov02945822011-11-10 11:28:57 +02004450 hdr = (struct ieee80211_hdr *) skb->data;
4451 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4452
4453out:
4454 rcu_read_unlock();
4455 return skb;
4456}
4457EXPORT_SYMBOL(ieee80211_proberesp_get);
4458
Kalle Valo7044cc52010-01-05 20:16:19 +02004459struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4460 struct ieee80211_vif *vif)
4461{
4462 struct ieee80211_sub_if_data *sdata;
4463 struct ieee80211_if_managed *ifmgd;
4464 struct ieee80211_pspoll *pspoll;
4465 struct ieee80211_local *local;
4466 struct sk_buff *skb;
4467
4468 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4469 return NULL;
4470
4471 sdata = vif_to_sdata(vif);
4472 ifmgd = &sdata->u.mgd;
4473 local = sdata->local;
4474
4475 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
Joe Perchesd15b8452011-08-29 14:17:31 -07004476 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02004477 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07004478
Kalle Valo7044cc52010-01-05 20:16:19 +02004479 skb_reserve(skb, local->hw.extra_tx_headroom);
4480
Johannes Bergb080db52017-06-16 14:29:19 +02004481 pspoll = skb_put_zero(skb, sizeof(*pspoll));
Kalle Valo7044cc52010-01-05 20:16:19 +02004482 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4483 IEEE80211_STYPE_PSPOLL);
4484 pspoll->aid = cpu_to_le16(ifmgd->aid);
4485
4486 /* aid in PS-Poll has its two MSBs each set to 1 */
4487 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4488
4489 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4490 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4491
4492 return skb;
4493}
4494EXPORT_SYMBOL(ieee80211_pspoll_get);
4495
4496struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004497 struct ieee80211_vif *vif,
4498 bool qos_ok)
Kalle Valo7044cc52010-01-05 20:16:19 +02004499{
4500 struct ieee80211_hdr_3addr *nullfunc;
4501 struct ieee80211_sub_if_data *sdata;
4502 struct ieee80211_if_managed *ifmgd;
4503 struct ieee80211_local *local;
4504 struct sk_buff *skb;
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004505 bool qos = false;
Kalle Valo7044cc52010-01-05 20:16:19 +02004506
4507 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4508 return NULL;
4509
4510 sdata = vif_to_sdata(vif);
4511 ifmgd = &sdata->u.mgd;
4512 local = sdata->local;
4513
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004514 if (qos_ok) {
4515 struct sta_info *sta;
4516
4517 rcu_read_lock();
4518 sta = sta_info_get(sdata, ifmgd->bssid);
4519 qos = sta && sta->sta.wme;
4520 rcu_read_unlock();
4521 }
4522
4523 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4524 sizeof(*nullfunc) + 2);
Joe Perchesd15b8452011-08-29 14:17:31 -07004525 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02004526 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07004527
Kalle Valo7044cc52010-01-05 20:16:19 +02004528 skb_reserve(skb, local->hw.extra_tx_headroom);
4529
Johannes Bergb080db52017-06-16 14:29:19 +02004530 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
Kalle Valo7044cc52010-01-05 20:16:19 +02004531 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4532 IEEE80211_STYPE_NULLFUNC |
4533 IEEE80211_FCTL_TODS);
Johannes Berg7b6ddea2017-11-21 14:46:08 +01004534 if (qos) {
4535 __le16 qos = cpu_to_le16(7);
4536
4537 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4538 IEEE80211_STYPE_NULLFUNC) !=
4539 IEEE80211_STYPE_QOS_NULLFUNC);
4540 nullfunc->frame_control |=
4541 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4542 skb->priority = 7;
4543 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
4544 skb_put_data(skb, &qos, sizeof(qos));
4545 }
4546
Kalle Valo7044cc52010-01-05 20:16:19 +02004547 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4548 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4549 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4550
4551 return skb;
4552}
4553EXPORT_SYMBOL(ieee80211_nullfunc_get);
4554
Kalle Valo05e54ea2010-01-05 20:16:38 +02004555struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
Johannes Berga344d672014-06-12 22:24:31 +02004556 const u8 *src_addr,
Kalle Valo05e54ea2010-01-05 20:16:38 +02004557 const u8 *ssid, size_t ssid_len,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01004558 size_t tailroom)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004559{
Johannes Berga344d672014-06-12 22:24:31 +02004560 struct ieee80211_local *local = hw_to_local(hw);
Kalle Valo05e54ea2010-01-05 20:16:38 +02004561 struct ieee80211_hdr_3addr *hdr;
4562 struct sk_buff *skb;
4563 size_t ie_ssid_len;
4564 u8 *pos;
4565
Kalle Valo05e54ea2010-01-05 20:16:38 +02004566 ie_ssid_len = 2 + ssid_len;
4567
4568 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
Johannes Bergb9a9ada2012-11-29 13:00:10 +01004569 ie_ssid_len + tailroom);
Joe Perchesd15b8452011-08-29 14:17:31 -07004570 if (!skb)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004571 return NULL;
Kalle Valo05e54ea2010-01-05 20:16:38 +02004572
4573 skb_reserve(skb, local->hw.extra_tx_headroom);
4574
Johannes Bergb080db52017-06-16 14:29:19 +02004575 hdr = skb_put_zero(skb, sizeof(*hdr));
Kalle Valo05e54ea2010-01-05 20:16:38 +02004576 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4577 IEEE80211_STYPE_PROBE_REQ);
Johannes Berge83e6542012-07-13 16:23:07 +02004578 eth_broadcast_addr(hdr->addr1);
Johannes Berga344d672014-06-12 22:24:31 +02004579 memcpy(hdr->addr2, src_addr, ETH_ALEN);
Johannes Berge83e6542012-07-13 16:23:07 +02004580 eth_broadcast_addr(hdr->addr3);
Kalle Valo05e54ea2010-01-05 20:16:38 +02004581
4582 pos = skb_put(skb, ie_ssid_len);
4583 *pos++ = WLAN_EID_SSID;
4584 *pos++ = ssid_len;
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02004585 if (ssid_len)
Kalle Valo05e54ea2010-01-05 20:16:38 +02004586 memcpy(pos, ssid, ssid_len);
4587 pos += ssid_len;
4588
Kalle Valo05e54ea2010-01-05 20:16:38 +02004589 return skb;
4590}
4591EXPORT_SYMBOL(ieee80211_probereq_get);
4592
Johannes Berg32bfd352007-12-19 01:31:26 +01004593void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02004594 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02004595 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02004596 struct ieee80211_rts *rts)
4597{
4598 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02004599
Harvey Harrison065e96052008-06-22 16:45:27 -07004600 rts->frame_control =
4601 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01004602 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4603 frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02004604 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4605 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4606}
4607EXPORT_SYMBOL(ieee80211_rts_get);
4608
Johannes Berg32bfd352007-12-19 01:31:26 +01004609void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02004610 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02004611 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02004612 struct ieee80211_cts *cts)
4613{
4614 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02004615
Harvey Harrison065e96052008-06-22 16:45:27 -07004616 cts->frame_control =
4617 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01004618 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4619 frame_len, frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02004620 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4621}
4622EXPORT_SYMBOL(ieee80211_ctstoself_get);
4623
4624struct sk_buff *
Johannes Berg32bfd352007-12-19 01:31:26 +01004625ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +02004626 struct ieee80211_vif *vif)
Johannes Berge2ebc742007-07-27 15:43:22 +02004627{
4628 struct ieee80211_local *local = hw_to_local(hw);
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004629 struct sk_buff *skb = NULL;
Johannes Berg5cf121c2008-02-25 16:27:43 +01004630 struct ieee80211_tx_data tx;
Johannes Berge2ebc742007-07-27 15:43:22 +02004631 struct ieee80211_sub_if_data *sdata;
Marco Porschd012a602012-10-10 12:39:50 -07004632 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +02004633 struct ieee80211_tx_info *info;
Johannes Berg55de9082012-07-26 17:24:39 +02004634 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02004635
Johannes Berg32bfd352007-12-19 01:31:26 +01004636 sdata = vif_to_sdata(vif);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004637
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004638 rcu_read_lock();
Johannes Berg55de9082012-07-26 17:24:39 +02004639 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004640
Marco Porschd012a602012-10-10 12:39:50 -07004641 if (!chanctx_conf)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004642 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01004643
Marco Porschd012a602012-10-10 12:39:50 -07004644 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4645 struct beacon_data *beacon =
4646 rcu_dereference(sdata->u.ap.beacon);
4647
4648 if (!beacon || !beacon->head)
4649 goto out;
4650
4651 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +01004652 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4653 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -07004654 } else {
4655 goto out;
4656 }
4657
4658 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004659 goto out; /* send buffered bc/mc only after DTIM beacon */
Johannes Berge039fa42008-05-15 12:55:29 +02004660
Johannes Berge2ebc742007-07-27 15:43:22 +02004661 while (1) {
Marco Porschd012a602012-10-10 12:39:50 -07004662 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +02004663 if (!skb)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03004664 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02004665 local->total_ps_buffered--;
4666
Marco Porschd012a602012-10-10 12:39:50 -07004667 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
Johannes Berge2ebc742007-07-27 15:43:22 +02004668 struct ieee80211_hdr *hdr =
4669 (struct ieee80211_hdr *) skb->data;
4670 /* more buffered multicast/broadcast frames ==> set
4671 * MoreData flag in IEEE 802.11 header to inform PS
4672 * STAs */
4673 hdr->frame_control |=
4674 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4675 }
4676
Michael Braun112c44b2014-03-06 15:08:43 +01004677 if (sdata->vif.type == NL80211_IFTYPE_AP)
Marco Porsch7cbf9d02013-03-01 16:01:18 +01004678 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
Johannes Berg7c107702015-03-20 14:18:27 +01004679 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
Johannes Berge2ebc742007-07-27 15:43:22 +02004680 break;
Felix Fietkau6b07d9c2016-08-02 11:13:41 +02004681 ieee80211_free_txskb(hw, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02004682 }
Johannes Berge039fa42008-05-15 12:55:29 +02004683
4684 info = IEEE80211_SKB_CB(skb);
4685
Johannes Berg5cf121c2008-02-25 16:27:43 +01004686 tx.flags |= IEEE80211_TX_PS_BUFFERED;
Johannes Berg4bf88532012-11-09 11:39:59 +01004687 info->band = chanctx_conf->def.chan->band;
Johannes Berge2ebc742007-07-27 15:43:22 +02004688
Johannes Berg97b045d2008-06-20 01:22:30 +02004689 if (invoke_tx_handlers(&tx))
Johannes Berge2ebc742007-07-27 15:43:22 +02004690 skb = NULL;
Johannes Berg97b045d2008-06-20 01:22:30 +02004691 out:
Johannes Bergd0709a62008-02-25 16:27:46 +01004692 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02004693
4694 return skb;
4695}
4696EXPORT_SYMBOL(ieee80211_get_buffered_bc);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004697
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004698int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4699{
4700 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4701 struct ieee80211_sub_if_data *sdata = sta->sdata;
4702 struct ieee80211_local *local = sdata->local;
4703 int ret;
4704 u32 queues;
4705
4706 lockdep_assert_held(&local->sta_mtx);
4707
4708 /* only some cases are supported right now */
4709 switch (sdata->vif.type) {
4710 case NL80211_IFTYPE_STATION:
4711 case NL80211_IFTYPE_AP:
4712 case NL80211_IFTYPE_AP_VLAN:
4713 break;
4714 default:
4715 WARN_ON(1);
4716 return -EINVAL;
4717 }
4718
4719 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4720 return -EINVAL;
4721
4722 if (sta->reserved_tid == tid) {
4723 ret = 0;
4724 goto out;
4725 }
4726
4727 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4728 sdata_err(sdata, "TID reservation already active\n");
4729 ret = -EALREADY;
4730 goto out;
4731 }
4732
4733 ieee80211_stop_vif_queues(sdata->local, sdata,
4734 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4735
4736 synchronize_net();
4737
4738 /* Tear down BA sessions so we stop aggregating on this TID */
Johannes Berg30686bf2015-06-02 21:39:54 +02004739 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004740 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4741 __ieee80211_stop_tx_ba_session(sta, tid,
4742 AGG_STOP_LOCAL_REQUEST);
4743 }
4744
4745 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +02004746 __ieee80211_flush_queues(local, sdata, queues, false);
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004747
4748 sta->reserved_tid = tid;
4749
4750 ieee80211_wake_vif_queues(local, sdata,
4751 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4752
Johannes Berg30686bf2015-06-02 21:39:54 +02004753 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
Liad Kaufmanb6da9112014-11-19 13:47:38 +02004754 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4755
4756 ret = 0;
4757 out:
4758 return ret;
4759}
4760EXPORT_SYMBOL(ieee80211_reserve_tid);
4761
4762void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4763{
4764 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4765 struct ieee80211_sub_if_data *sdata = sta->sdata;
4766
4767 lockdep_assert_held(&sdata->local->sta_mtx);
4768
4769 /* only some cases are supported right now */
4770 switch (sdata->vif.type) {
4771 case NL80211_IFTYPE_STATION:
4772 case NL80211_IFTYPE_AP:
4773 case NL80211_IFTYPE_AP_VLAN:
4774 break;
4775 default:
4776 WARN_ON(1);
4777 return;
4778 }
4779
4780 if (tid != sta->reserved_tid) {
4781 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4782 return;
4783 }
4784
4785 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4786}
4787EXPORT_SYMBOL(ieee80211_unreserve_tid);
4788
Johannes Berg55de9082012-07-26 17:24:39 +02004789void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4790 struct sk_buff *skb, int tid,
Johannes Bergb9771d42018-05-28 15:47:41 +02004791 enum nl80211_band band, u32 txdata_flags)
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004792{
Amadeusz Sławiński731977e2017-01-24 16:42:10 +01004793 int ac = ieee80211_ac_from_tid(tid);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02004794
Zhang Shengjud57a5442016-03-03 01:16:56 +00004795 skb_reset_mac_header(skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02004796 skb_set_queue_mapping(skb, ac);
Helmut Schaacf6bb792011-12-15 10:18:34 +01004797 skb->priority = tid;
Johannes Bergcf0277e2010-01-05 18:00:58 +01004798
Johannes Berg89afe612013-02-13 15:39:57 +01004799 skb->dev = sdata->dev;
4800
Johannes Berg3d34deb2009-06-18 17:25:11 +02004801 /*
4802 * The other path calling ieee80211_xmit is from the tasklet,
4803 * and while we can handle concurrent transmissions locking
4804 * requirements are that we do not come into tx with bhs on.
4805 */
4806 local_bh_disable();
Johannes Berg73c4e192014-11-09 18:50:09 +02004807 IEEE80211_SKB_CB(skb)->band = band;
Johannes Bergb9771d42018-05-28 15:47:41 +02004808 ieee80211_xmit(sdata, NULL, skb, txdata_flags);
Johannes Berg3d34deb2009-06-18 17:25:11 +02004809 local_bh_enable();
Johannes Berg3b8d81e02009-06-17 17:43:56 +02004810}
Denis Kenzior91180642018-03-26 12:52:50 -05004811
4812int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
4813 const u8 *buf, size_t len,
4814 const u8 *dest, __be16 proto, bool unencrypted)
4815{
4816 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4817 struct ieee80211_local *local = sdata->local;
4818 struct sk_buff *skb;
4819 struct ethhdr *ehdr;
4820 u32 flags;
4821
4822 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
4823 * or Pre-Authentication
4824 */
4825 if (proto != sdata->control_port_protocol &&
4826 proto != cpu_to_be16(ETH_P_PREAUTH))
4827 return -EINVAL;
4828
4829 if (unencrypted)
4830 flags = IEEE80211_TX_INTFL_DONT_ENCRYPT;
4831 else
4832 flags = 0;
4833
4834 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4835 sizeof(struct ethhdr) + len);
4836 if (!skb)
4837 return -ENOMEM;
4838
4839 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
4840
4841 skb_put_data(skb, buf, len);
4842
4843 ehdr = skb_push(skb, sizeof(struct ethhdr));
4844 memcpy(ehdr->h_dest, dest, ETH_ALEN);
4845 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
4846 ehdr->h_proto = proto;
4847
4848 skb->dev = dev;
4849 skb->protocol = htons(ETH_P_802_3);
4850 skb_reset_network_header(skb);
4851 skb_reset_mac_header(skb);
4852
Denis Kenziore7441c92018-06-19 10:39:50 -05004853 local_bh_disable();
Denis Kenzior91180642018-03-26 12:52:50 -05004854 __ieee80211_subif_start_xmit(skb, skb->dev, flags);
Denis Kenziore7441c92018-06-19 10:39:50 -05004855 local_bh_enable();
Denis Kenzior91180642018-03-26 12:52:50 -05004856
4857 return 0;
4858}