blob: b8233505bf9fd3bb4945c126eebee069f2b94878 [file] [log] [blame]
Johannes Berge2ebc742007-07-27 15:43:22 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
Johannes Bergd98ad832014-09-03 15:24:57 +03006 * Copyright 2013-2014 Intel Mobile Communications GmbH
Johannes Berge2ebc742007-07-27 15:43:22 +02007 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 *
13 * Transmit and frame generation functions.
14 */
15
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/bitmap.h>
Johannes Bergd4e46a32007-09-14 11:10:24 -040021#include <linux/rcupdate.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040022#include <linux/export.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070023#include <net/net_namespace.h>
Johannes Berge2ebc742007-07-27 15:43:22 +020024#include <net/ieee80211_radiotap.h>
25#include <net/cfg80211.h>
26#include <net/mac80211.h>
27#include <asm/unaligned.h>
28
29#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020030#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040031#include "led.h"
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +010032#include "mesh.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020033#include "wep.h"
34#include "wpa.h"
35#include "wme.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040036#include "rate.h"
Johannes Berge2ebc742007-07-27 15:43:22 +020037
Johannes Berge2ebc742007-07-27 15:43:22 +020038/* misc utils */
39
Johannes Berg5a490512015-04-22 17:10:38 +020040static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
41{
42 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
43
44 u64_stats_update_begin(&tstats->syncp);
45 tstats->tx_packets++;
46 tstats->tx_bytes += len;
47 u64_stats_update_end(&tstats->syncp);
48}
49
Johannes Berg252b86c2011-11-16 15:28:55 +010050static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
51 struct sk_buff *skb, int group_addr,
Johannes Berg03f93c32008-06-25 14:36:27 +030052 int next_frag_len)
Johannes Berge2ebc742007-07-27 15:43:22 +020053{
Simon Wunderlich2103dec2013-07-08 16:55:53 +020054 int rate, mrate, erp, dur, i, shift = 0;
Johannes Berg2e92e6f2008-05-15 12:55:27 +020055 struct ieee80211_rate *txrate;
Johannes Berge2ebc742007-07-27 15:43:22 +020056 struct ieee80211_local *local = tx->local;
Johannes Berg8318d782008-01-24 19:38:38 +010057 struct ieee80211_supported_band *sband;
Harvey Harrison358c8d92008-07-15 18:44:13 -070058 struct ieee80211_hdr *hdr;
Johannes Berg252b86c2011-11-16 15:28:55 +010059 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Simon Wunderlich2103dec2013-07-08 16:55:53 +020060 struct ieee80211_chanctx_conf *chanctx_conf;
61 u32 rate_flags = 0;
62
63 rcu_read_lock();
64 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
65 if (chanctx_conf) {
66 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
67 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
68 }
69 rcu_read_unlock();
Johannes Berge6a98542008-10-21 12:40:02 +020070
71 /* assume HW handles this */
Felix Fietkau336004e2014-11-21 23:29:14 +010072 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
Johannes Berge6a98542008-10-21 12:40:02 +020073 return 0;
74
75 /* uh huh? */
Felix Fietkau0d528d82013-04-22 16:14:41 +020076 if (WARN_ON_ONCE(tx->rate.idx < 0))
Johannes Berge6a98542008-10-21 12:40:02 +020077 return 0;
Johannes Berge2ebc742007-07-27 15:43:22 +020078
Johannes Berg2d565772012-07-23 15:12:51 +020079 sband = local->hw.wiphy->bands[info->band];
Felix Fietkau0d528d82013-04-22 16:14:41 +020080 txrate = &sband->bitrates[tx->rate.idx];
Johannes Berg8318d782008-01-24 19:38:38 +010081
Johannes Berge6a98542008-10-21 12:40:02 +020082 erp = txrate->flags & IEEE80211_RATE_ERP_G;
Johannes Berge2ebc742007-07-27 15:43:22 +020083
84 /*
85 * data and mgmt (except PS Poll):
86 * - during CFP: 32768
87 * - during contention period:
88 * if addr1 is group address: 0
89 * if more fragments = 0 and addr1 is individual address: time to
90 * transmit one ACK plus SIFS
91 * if more fragments = 1 and addr1 is individual address: time to
92 * transmit next fragment plus 2 x ACK plus 3 x SIFS
93 *
94 * IEEE 802.11, 9.6:
95 * - control response frame (CTS or ACK) shall be transmitted using the
96 * same rate as the immediately previous frame in the frame exchange
97 * sequence, if this rate belongs to the PHY mandatory rates, or else
98 * at the highest possible rate belonging to the PHY rates in the
99 * BSSBasicRateSet
100 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100101 hdr = (struct ieee80211_hdr *)skb->data;
Harvey Harrison358c8d92008-07-15 18:44:13 -0700102 if (ieee80211_is_ctl(hdr->frame_control)) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200103 /* TODO: These control frames are not currently sent by
Johannes Bergccd7b362008-09-11 00:01:56 +0200104 * mac80211, but should they be implemented, this function
Johannes Berge2ebc742007-07-27 15:43:22 +0200105 * needs to be updated to support duration field calculation.
106 *
107 * RTS: time needed to transmit pending data/mgmt frame plus
108 * one CTS frame plus one ACK frame plus 3 x SIFS
109 * CTS: duration of immediately previous RTS minus time
110 * required to transmit CTS and its SIFS
111 * ACK: 0 if immediately previous directed data/mgmt had
112 * more=0, with more=1 duration in ACK frame is duration
113 * from previous frame minus time needed to transmit ACK
114 * and its SIFS
115 * PS Poll: BIT(15) | BIT(14) | aid
116 */
117 return 0;
118 }
119
120 /* data/mgmt */
121 if (0 /* FIX: data/mgmt during CFP */)
Johannes Berg03f93c32008-06-25 14:36:27 +0300122 return cpu_to_le16(32768);
Johannes Berge2ebc742007-07-27 15:43:22 +0200123
124 if (group_addr) /* Group address as the destination - no ACK */
125 return 0;
126
127 /* Individual destination address:
128 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
129 * CTS and ACK frames shall be transmitted using the highest rate in
130 * basic rate set that is less than or equal to the rate of the
131 * immediately previous frame and that is using the same modulation
132 * (CCK or OFDM). If no basic rate set matches with these requirements,
133 * the highest mandatory rate of the PHY that is less than or equal to
134 * the rate of the previous frame is used.
135 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
136 */
137 rate = -1;
Johannes Berg8318d782008-01-24 19:38:38 +0100138 /* use lowest available if everything fails */
139 mrate = sband->bitrates[0].bitrate;
140 for (i = 0; i < sband->n_bitrates; i++) {
141 struct ieee80211_rate *r = &sband->bitrates[i];
142
143 if (r->bitrate > txrate->bitrate)
Johannes Berge2ebc742007-07-27 15:43:22 +0200144 break;
145
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200146 if ((rate_flags & r->flags) != rate_flags)
147 continue;
148
Johannes Bergbda39332008-10-11 01:51:51 +0200149 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200150 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200151
Johannes Berg8318d782008-01-24 19:38:38 +0100152 switch (sband->band) {
153 case IEEE80211_BAND_2GHZ: {
154 u32 flag;
155 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
156 flag = IEEE80211_RATE_MANDATORY_G;
157 else
158 flag = IEEE80211_RATE_MANDATORY_B;
159 if (r->flags & flag)
160 mrate = r->bitrate;
161 break;
162 }
163 case IEEE80211_BAND_5GHZ:
164 if (r->flags & IEEE80211_RATE_MANDATORY_A)
165 mrate = r->bitrate;
166 break;
Vladimir Kondratiev3a0c52a2012-07-02 09:32:32 +0300167 case IEEE80211_BAND_60GHZ:
168 /* TODO, for now fall through */
Johannes Berg8318d782008-01-24 19:38:38 +0100169 case IEEE80211_NUM_BANDS:
170 WARN_ON(1);
171 break;
172 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200173 }
174 if (rate == -1) {
175 /* No matching basic rate found; use highest suitable mandatory
176 * PHY rate */
Simon Wunderlich2103dec2013-07-08 16:55:53 +0200177 rate = DIV_ROUND_UP(mrate, 1 << shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200178 }
179
Simon Wunderlich6674f212011-11-21 21:34:30 +0100180 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
181 if (ieee80211_is_data_qos(hdr->frame_control) &&
Claudio Pisac26a0e12012-05-28 13:06:25 +0100182 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
Simon Wunderlich6674f212011-11-21 21:34:30 +0100183 dur = 0;
184 else
185 /* Time needed to transmit ACK
186 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
187 * to closest integer */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200188 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200189 tx->sdata->vif.bss_conf.use_short_preamble,
190 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200191
192 if (next_frag_len) {
193 /* Frame is fragmented: duration increases with time needed to
194 * transmit next fragment plus ACK and 2 x SIFS. */
195 dur *= 2; /* ACK + SIFS */
196 /* next fragment */
Michal Kazior4ee73f32012-04-11 08:47:56 +0200197 dur += ieee80211_frame_duration(sband->band, next_frag_len,
Johannes Berg8318d782008-01-24 19:38:38 +0100198 txrate->bitrate, erp,
Simon Wunderlich438b61b2013-07-08 16:55:51 +0200199 tx->sdata->vif.bss_conf.use_short_preamble,
200 shift);
Johannes Berge2ebc742007-07-27 15:43:22 +0200201 }
202
Johannes Berg03f93c32008-06-25 14:36:27 +0300203 return cpu_to_le16(dur);
Johannes Berge2ebc742007-07-27 15:43:22 +0200204}
205
Johannes Berge2ebc742007-07-27 15:43:22 +0200206/* tx handlers */
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200207static ieee80211_tx_result debug_noinline
208ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
209{
210 struct ieee80211_local *local = tx->local;
Kalle Valo0c742112010-01-12 10:42:53 +0200211 struct ieee80211_if_managed *ifmgd;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200212
213 /* driver doesn't support power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200214 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200215 return TX_CONTINUE;
216
217 /* hardware does dynamic power save */
Johannes Berg30686bf2015-06-02 21:39:54 +0200218 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200219 return TX_CONTINUE;
220
221 /* dynamic power save disabled */
222 if (local->hw.conf.dynamic_ps_timeout <= 0)
223 return TX_CONTINUE;
224
225 /* we are scanning, don't enable power save */
226 if (local->scanning)
227 return TX_CONTINUE;
228
229 if (!local->ps_sdata)
230 return TX_CONTINUE;
231
232 /* No point if we're going to suspend */
233 if (local->quiescing)
234 return TX_CONTINUE;
235
Kalle Valo0c742112010-01-12 10:42:53 +0200236 /* dynamic ps is supported only in managed mode */
237 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
238 return TX_CONTINUE;
239
240 ifmgd = &tx->sdata->u.mgd;
241
242 /*
243 * Don't wakeup from power save if u-apsd is enabled, voip ac has
244 * u-apsd enabled and the frame is in voip class. This effectively
245 * means that even if all access categories have u-apsd enabled, in
246 * practise u-apsd is only used with the voip ac. This is a
247 * workaround for the case when received voip class packets do not
248 * have correct qos tag for some reason, due the network or the
249 * peer application.
250 *
Eliad Pellerdc41e4d2012-03-14 16:15:03 +0200251 * Note: ifmgd->uapsd_queues access is racy here. If the value is
Kalle Valo0c742112010-01-12 10:42:53 +0200252 * changed via debugfs, user needs to reassociate manually to have
253 * everything in sync.
254 */
Johannes Berg4875d30d2012-03-27 14:18:37 +0200255 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
256 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
257 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
Kalle Valo0c742112010-01-12 10:42:53 +0200258 return TX_CONTINUE;
259
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200260 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
261 ieee80211_stop_queues_by_reason(&local->hw,
Johannes Berg445ea4e2013-02-13 12:25:28 +0100262 IEEE80211_MAX_QUEUE_MAP,
Luciano Coelhocca07b02014-06-13 16:30:05 +0300263 IEEE80211_QUEUE_STOP_REASON_PS,
264 false);
Vivek Natarajandb285692011-02-18 17:18:03 +0530265 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200266 ieee80211_queue_work(&local->hw,
267 &local->dynamic_ps_disable_work);
268 }
269
Luciano Coelho5db1c072011-05-03 21:40:08 +0300270 /* Don't restart the timer if we're not disassociated */
271 if (!ifmgd->associated)
272 return TX_CONTINUE;
273
Kalle Valo5c1b98a2010-01-12 10:42:46 +0200274 mod_timer(&local->dynamic_ps_timer, jiffies +
275 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
276
277 return TX_CONTINUE;
278}
Johannes Berge2ebc742007-07-27 15:43:22 +0200279
Johannes Bergd9e8a702008-06-30 15:10:44 +0200280static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100281ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200282{
Harvey Harrison358c8d92008-07-15 18:44:13 -0700283
Johannes Berge039fa42008-05-15 12:55:29 +0200284 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Berge039fa42008-05-15 12:55:29 +0200285 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200286 bool assoc = false;
Johannes Berge2ebc742007-07-27 15:43:22 +0200287
Johannes Berge039fa42008-05-15 12:55:29 +0200288 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100289 return TX_CONTINUE;
Johannes Berg58d41852007-09-26 17:53:18 +0200290
Ben Greearb23b0252011-02-04 11:54:17 -0800291 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
292 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
Kalle Valoa9a6fff2009-03-18 14:06:44 +0200293 !ieee80211_is_probe_req(hdr->frame_control) &&
294 !ieee80211_is_nullfunc(hdr->frame_control))
295 /*
296 * When software scanning only nullfunc frames (to notify
297 * the sleep state to the AP) and probe requests (for the
298 * active scan) are allowed, all other frames should not be
299 * sent and we should not get here, but if we do
300 * nonetheless, drop them to avoid sending them
301 * off-channel. See the link below and
302 * ieee80211_start_scan() for more.
303 *
304 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
305 */
Johannes Berg9ae54c82008-01-31 19:48:20 +0100306 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200307
Rostislav Lisovy239281f2014-11-03 10:33:19 +0100308 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
309 return TX_CONTINUE;
310
Bill Jordan1be7fe82010-10-01 11:20:41 -0400311 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
312 return TX_CONTINUE;
313
Johannes Berg05c914f2008-09-11 00:01:58 +0200314 if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +0100315 return TX_CONTINUE;
316
Johannes Berg5cf121c2008-02-25 16:27:43 +0100317 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
Johannes Berg9ae54c82008-01-31 19:48:20 +0100318 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200319
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200320 if (tx->sta)
321 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge2ebc742007-07-27 15:43:22 +0200322
Johannes Berg5cf121c2008-02-25 16:27:43 +0100323 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200324 if (unlikely(!assoc &&
Harvey Harrison358c8d92008-07-15 18:44:13 -0700325 ieee80211_is_data(hdr->frame_control))) {
Johannes Berge2ebc742007-07-27 15:43:22 +0200326#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200327 sdata_info(tx->sdata,
328 "dropped data frame to not associated station %pM\n",
329 hdr->addr1);
330#endif
Johannes Berge2ebc742007-07-27 15:43:22 +0200331 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
Johannes Berg9ae54c82008-01-31 19:48:20 +0100332 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200333 }
Johannes Berg29623892011-12-14 12:20:31 +0100334 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
335 ieee80211_is_data(hdr->frame_control) &&
Felix Fietkau030ef8f2012-04-23 19:49:02 +0200336 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
Johannes Berg29623892011-12-14 12:20:31 +0100337 /*
338 * No associated STAs - no need to send multicast
339 * frames.
340 */
341 return TX_DROP;
Johannes Berge2ebc742007-07-27 15:43:22 +0200342 }
343
Johannes Berg9ae54c82008-01-31 19:48:20 +0100344 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200345}
346
Johannes Berge2ebc742007-07-27 15:43:22 +0200347/* This function is called whenever the AP is about to exceed the maximum limit
348 * of buffered frames for power saving STAs. This situation should not really
349 * happen often during normal operation, so dropping the oldest buffered packet
350 * from each queue should be OK to make some room for new frames. */
351static void purge_old_ps_buffers(struct ieee80211_local *local)
352{
353 int total = 0, purged = 0;
354 struct sk_buff *skb;
355 struct ieee80211_sub_if_data *sdata;
356 struct sta_info *sta;
357
Johannes Berg79010422007-09-18 17:29:21 -0400358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Marco Porschd012a602012-10-10 12:39:50 -0700359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700365 else
Johannes Berge2ebc742007-07-27 15:43:22 +0200366 continue;
Marco Porschd012a602012-10-10 12:39:50 -0700367
368 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200369 if (skb) {
370 purged++;
371 dev_kfree_skb(skb);
372 }
Marco Porschd012a602012-10-10 12:39:50 -0700373 total += skb_queue_len(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +0200374 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200375
Johannes Berg948d8872011-09-29 16:04:29 +0200376 /*
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
379 */
Johannes Bergd0709a62008-02-25 16:27:46 +0100380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
Johannes Berg948d8872011-09-29 16:04:29 +0200381 int ac;
382
383 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
384 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
385 total += skb_queue_len(&sta->ps_tx_buf[ac]);
386 if (skb) {
387 purged++;
Felix Fietkauc3e77242012-10-08 14:39:33 +0200388 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg948d8872011-09-29 16:04:29 +0200389 break;
390 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200391 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200392 }
Johannes Bergd0709a62008-02-25 16:27:46 +0100393
Johannes Berge2ebc742007-07-27 15:43:22 +0200394 local->total_ps_buffered = total;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
Johannes Berge2ebc742007-07-27 15:43:22 +0200396}
397
Johannes Berg9ae54c82008-01-31 19:48:20 +0100398static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200400{
Johannes Berge039fa42008-05-15 12:55:29 +0200401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Marco Porschd012a602012-10-10 12:39:50 -0700403 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +0200404
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100405 /*
406 * broadcast/multicast frame
407 *
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100408 * If any of the associated/peer stations is in power save mode,
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
411 */
412
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
Marco Porschd012a602012-10-10 12:39:50 -0700414 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
415 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
416 if (!tx->sdata->bss)
417 return TX_CONTINUE;
418
419 ps = &tx->sdata->bss->ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -0700422 } else {
Johannes Berg3e122be2008-07-09 14:40:34 +0200423 return TX_CONTINUE;
Marco Porschd012a602012-10-10 12:39:50 -0700424 }
425
Johannes Berg3e122be2008-07-09 14:40:34 +0200426
427 /* no buffering for ordered frames */
Harvey Harrison358c8d92008-07-15 18:44:13 -0700428 if (ieee80211_has_order(hdr->frame_control))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100429 return TX_CONTINUE;
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100430
Johannes Berg08b99392014-07-07 12:01:11 +0200431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
Johannes Berg30686bf2015-06-02 21:39:54 +0200434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
Johannes Bergf4d57942013-05-28 17:24:15 +0200435 info->hw_queue = tx->sdata->vif.cab_queue;
436
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100437 /* no stations in PS mode */
Marco Porschd012a602012-10-10 12:39:50 -0700438 if (!atomic_read(&ps->num_sta_ps))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100439 return TX_CONTINUE;
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100440
Johannes Berg62b517c2009-10-29 12:19:21 +0100441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
Johannes Berg62b12082009-08-10 16:04:15 +0200442
Johannes Berg62b517c2009-10-29 12:19:21 +0100443 /* device releases frame after DTIM beacon */
Johannes Berg30686bf2015-06-02 21:39:54 +0200444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
Johannes Berg62b12082009-08-10 16:04:15 +0200445 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200446
Johannes Berg62b12082009-08-10 16:04:15 +0200447 /* buffered in mac80211 */
448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
Johannes Berg7d54d0dd2007-12-19 01:31:25 +0100450
Marco Porschd012a602012-10-10 12:39:50 -0700451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
Marco Porschd012a602012-10-10 12:39:50 -0700454 dev_kfree_skb(skb_dequeue(&ps->bc_buf));
Johannes Berg62b12082009-08-10 16:04:15 +0200455 } else
456 tx->local->total_ps_buffered++;
457
Marco Porschd012a602012-10-10 12:39:50 -0700458 skb_queue_tail(&ps->bc_buf, tx->skb);
Johannes Berg62b12082009-08-10 16:04:15 +0200459
460 return TX_QUEUED;
Johannes Berge2ebc742007-07-27 15:43:22 +0200461}
462
Jouni Malinenfb733332009-01-08 13:32:00 +0200463static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
464 struct sk_buff *skb)
465{
466 if (!ieee80211_is_mgmt(fc))
467 return 0;
468
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
Jouni Malinenfb733332009-01-08 13:32:00 +0200470 return 0;
471
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100472 if (!ieee80211_is_robust_mgmt_frame(skb))
Jouni Malinenfb733332009-01-08 13:32:00 +0200473 return 0;
474
475 return 1;
476}
477
Johannes Berg9ae54c82008-01-31 19:48:20 +0100478static ieee80211_tx_result
Johannes Berg5cf121c2008-02-25 16:27:43 +0100479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200480{
481 struct sta_info *sta = tx->sta;
Johannes Berge039fa42008-05-15 12:55:29 +0200482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg08b99392014-07-07 12:01:11 +0200483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300484 struct ieee80211_local *local = tx->local;
Johannes Berge2ebc742007-07-27 15:43:22 +0200485
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100486 if (unlikely(!sta))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100487 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200488
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
Johannes Berg5ac2e352014-05-27 16:32:27 +0200490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
Johannes Berg02f2f1a2012-02-27 12:18:30 +0100492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
Johannes Berg948d8872011-09-29 16:04:29 +0200493 int ac = skb_get_queue_mapping(tx->skb);
494
Johannes Berg08b99392014-07-07 12:01:11 +0200495 if (ieee80211_is_mgmt(hdr->frame_control) &&
496 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
497 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
498 return TX_CONTINUE;
499 }
500
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
Johannes Berge2ebc742007-07-27 15:43:22 +0200503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200505
506 /* sync with ieee80211_sta_ps_deliver_wakeup */
507 spin_lock(&sta->ps_lock);
508 /*
509 * STA woke up the meantime and all the frames on ps_tx_buf have
510 * been queued to pending queue. No reordering can happen, go
511 * ahead and Tx the packet.
512 */
513 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
Johannes Berg5ac2e352014-05-27 16:32:27 +0200514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
Johannes Berg948d8872011-09-29 16:04:29 +0200520 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
521 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
Felix Fietkauc3e77242012-10-08 14:39:33 +0200525 ieee80211_free_txskb(&local->hw, old);
Johannes Berge2ebc742007-07-27 15:43:22 +0200526 } else
527 tx->local->total_ps_buffered++;
Johannes Berg004c8722008-02-20 11:21:35 +0100528
Johannes Berge039fa42008-05-15 12:55:29 +0200529 info->control.jiffies = jiffies;
Johannes Berg5061b0c2009-07-14 00:33:34 +0200530 info->control.vif = &tx->sdata->vif;
Johannes Berg8f77f382009-06-07 21:58:37 +0200531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Johannes Berg03c8c062014-01-09 01:45:28 +0100532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
Johannes Berg948d8872011-09-29 16:04:29 +0200533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
Emmanuel Grumbach1d147bf2014-02-20 09:22:11 +0200534 spin_unlock(&sta->ps_lock);
Juuso Oikarinen3393a602010-04-19 10:12:52 +0300535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
Johannes Bergc868cb352011-09-29 16:04:27 +0200541 /*
542 * We queued up some frames, so the TIM bit might
543 * need to be set, recalculate it.
544 */
545 sta_info_recalc_tim(sta);
546
Johannes Berg9ae54c82008-01-31 19:48:20 +0100547 return TX_QUEUED;
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200548 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
549 ps_dbg(tx->sdata,
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 sta->sta.addr);
Johannes Berge2ebc742007-07-27 15:43:22 +0200552 }
Johannes Berge2ebc742007-07-27 15:43:22 +0200553
Johannes Berg9ae54c82008-01-31 19:48:20 +0100554 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200555}
556
Johannes Bergd9e8a702008-06-30 15:10:44 +0200557static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200559{
Johannes Berg5cf121c2008-02-25 16:27:43 +0100560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
Johannes Berg9ae54c82008-01-31 19:48:20 +0100561 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200562
Johannes Berg5cf121c2008-02-25 16:27:43 +0100563 if (tx->flags & IEEE80211_TX_UNICAST)
Johannes Berge2ebc742007-07-27 15:43:22 +0200564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
Johannes Bergd9e8a702008-06-30 15:10:44 +0200569static ieee80211_tx_result debug_noinline
Johannes Berga621fa42010-08-27 14:26:54 +0300570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
Johannes Bergaf61a162013-07-02 18:09:12 +0200574 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
575 if (tx->sdata->control_port_no_encrypt)
576 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
577 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
Jouni Malinen9c1c98a2015-02-26 15:50:50 +0200578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
Johannes Bergaf61a162013-07-02 18:09:12 +0200579 }
Johannes Berga621fa42010-08-27 14:26:54 +0300580
581 return TX_CONTINUE;
582}
583
584static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200586{
Johannes Berg46e6de12012-07-04 18:10:07 +0200587 struct ieee80211_key *key;
Johannes Berge039fa42008-05-15 12:55:29 +0200588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Harvey Harrison358c8d92008-07-15 18:44:13 -0700589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergd4e46a32007-09-14 11:10:24 -0400590
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
Johannes Berge2ebc742007-07-27 15:43:22 +0200592 tx->key = NULL;
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400595 tx->key = key;
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200596 else if (ieee80211_is_mgmt(hdr->frame_control) &&
Jouni Malinenecbcd322010-03-29 23:35:23 -0700597 is_multicast_ether_addr(hdr->addr1) &&
Johannes Bergd8ca16d2014-01-23 16:20:29 +0100598 ieee80211_is_robust_mgmt_frame(tx->skb) &&
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200599 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
600 tx->key = key;
Johannes Bergf7e01042010-12-09 19:49:02 +0100601 else if (is_multicast_ether_addr(hdr->addr1) &&
602 (key = rcu_dereference(tx->sdata->default_multicast_key)))
603 tx->key = key;
604 else if (!is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_unicast_key)))
Johannes Bergd4e46a32007-09-14 11:10:24 -0400606 tx->key = key;
Johannes Berge8f4fb72015-03-20 11:37:36 +0100607 else
Johannes Berg46e6de12012-07-04 18:10:07 +0200608 tx->key = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +0200609
610 if (tx->key) {
Johannes Berg813d7662010-01-17 01:47:58 +0100611 bool skip_hw = false;
612
Johannes Berge2ebc742007-07-27 15:43:22 +0200613 tx->key->tx_rx_count++;
Johannes Berg011bfcc2007-09-17 01:29:25 -0400614 /* TODO: add threshold stuff again */
Johannes Berg176e4f82007-12-18 15:27:47 +0100615
Johannes Berg97359d12010-08-10 09:46:38 +0200616 switch (tx->key->conf.cipher) {
617 case WLAN_CIPHER_SUITE_WEP40:
618 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berg97359d12010-08-10 09:46:38 +0200619 case WLAN_CIPHER_SUITE_TKIP:
Harvey Harrison358c8d92008-07-15 18:44:13 -0700620 if (!ieee80211_is_data_present(hdr->frame_control))
Johannes Berg176e4f82007-12-18 15:27:47 +0100621 tx->key = NULL;
622 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200623 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +0200624 case WLAN_CIPHER_SUITE_CCMP_256:
Jouni Malinen00b9cfa2015-01-24 19:52:06 +0200625 case WLAN_CIPHER_SUITE_GCMP:
626 case WLAN_CIPHER_SUITE_GCMP_256:
Jouni Malinenfb733332009-01-08 13:32:00 +0200627 if (!ieee80211_is_data_present(hdr->frame_control) &&
628 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
629 tx->skb))
630 tx->key = NULL;
Kalle Valo3b43a182010-01-23 20:27:14 +0200631 else
632 skip_hw = (tx->key->conf.flags &
Johannes Berge548c492012-09-04 17:08:23 +0200633 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
Kalle Valo3b43a182010-01-23 20:27:14 +0200634 ieee80211_is_mgmt(hdr->frame_control);
Jouni Malinenfb733332009-01-08 13:32:00 +0200635 break;
Johannes Berg97359d12010-08-10 09:46:38 +0200636 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen56c52da2015-01-24 19:52:08 +0200637 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
Jouni Malinen8ade5382015-01-24 19:52:09 +0200638 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
639 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +0200640 if (!ieee80211_is_mgmt(hdr->frame_control))
641 tx->key = NULL;
642 break;
Johannes Berg176e4f82007-12-18 15:27:47 +0100643 }
Johannes Berg813d7662010-01-17 01:47:58 +0100644
Johannes Berge54faf22013-01-29 11:41:38 +0100645 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
646 !ieee80211_is_deauth(hdr->frame_control)))
Johannes Berg95acac62011-07-12 12:30:59 +0200647 return TX_DROP;
648
Johannes Bergf12553e2010-01-22 22:07:59 +0100649 if (!skip_hw && tx->key &&
Johannes Berg382b1652010-01-25 11:36:16 +0100650 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
Johannes Berg813d7662010-01-17 01:47:58 +0100651 info->control.hw_key = &tx->key->conf;
Johannes Berge2ebc742007-07-27 15:43:22 +0200652 }
653
Johannes Berg9ae54c82008-01-31 19:48:20 +0100654 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200655}
656
Johannes Bergd9e8a702008-06-30 15:10:44 +0200657static ieee80211_tx_result debug_noinline
Johannes Berg5cf121c2008-02-25 16:27:43 +0100658ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
Johannes Berge2ebc742007-07-27 15:43:22 +0200659{
Johannes Berge039fa42008-05-15 12:55:29 +0200660 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200661 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
662 struct ieee80211_supported_band *sband;
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700663 u32 len;
Johannes Berge6a98542008-10-21 12:40:02 +0200664 struct ieee80211_tx_rate_control txrc;
Felix Fietkau0d528d82013-04-22 16:14:41 +0200665 struct ieee80211_sta_rates *ratetbl = NULL;
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200666 bool assoc = false;
Johannes Berge6a98542008-10-21 12:40:02 +0200667
668 memset(&txrc, 0, sizeof(txrc));
Johannes Berg8318d782008-01-24 19:38:38 +0100669
Johannes Berg2d565772012-07-23 15:12:51 +0200670 sband = tx->local->hw.wiphy->bands[info->band];
Johannes Berge2ebc742007-07-27 15:43:22 +0200671
Shanyu Zhaoa2c40242010-04-27 11:15:12 -0700672 len = min_t(u32, tx->skb->len + FCS_LEN,
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200673 tx->local->hw.wiphy->frag_threshold);
Johannes Berg58d41852007-09-26 17:53:18 +0200674
Johannes Berge6a98542008-10-21 12:40:02 +0200675 /* set up the tx rate control struct we give the RC algo */
Johannes Berg005e4722012-02-26 11:24:35 +0100676 txrc.hw = &tx->local->hw;
Johannes Berge6a98542008-10-21 12:40:02 +0200677 txrc.sband = sband;
678 txrc.bss_conf = &tx->sdata->vif.bss_conf;
679 txrc.skb = tx->skb;
680 txrc.reported_rate.idx = -1;
Johannes Berg2d565772012-07-23 15:12:51 +0200681 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
Jouni Malinen37eb0b12010-01-06 13:09:08 +0200682 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
683 txrc.max_rate_idx = -1;
684 else
685 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
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 ||
Felix Fietkau8f0729b2010-11-11 15:07:23 +0100693 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC);
Johannes Berg58d41852007-09-26 17:53:18 +0200694
Johannes Berge6a98542008-10-21 12:40:02 +0200695 /* set up RTS protection if desired */
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200696 if (len > tx->local->hw.wiphy->rts_threshold) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200697 txrc.rts = true;
Johannes Berge2ebc742007-07-27 15:43:22 +0200698 }
Johannes Berge6a98542008-10-21 12:40:02 +0200699
Felix Fietkau0d528d82013-04-22 16:14:41 +0200700 info->control.use_rts = txrc.rts;
Felix Fietkau991fec02013-04-16 13:38:43 +0200701 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
702
Johannes Berge6a98542008-10-21 12:40:02 +0200703 /*
704 * Use short preamble if the BSS can handle it, but not for
705 * management frames unless we know the receiver can handle
706 * that -- the management frame might be to a station that
707 * just wants a probe response.
708 */
709 if (tx->sdata->vif.bss_conf.use_short_preamble &&
710 (ieee80211_is_data(hdr->frame_control) ||
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200711 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
Felix Fietkau0d528d82013-04-22 16:14:41 +0200712 txrc.short_preamble = true;
713
714 info->control.short_preamble = txrc.short_preamble;
Johannes Berge6a98542008-10-21 12:40:02 +0200715
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200716 if (tx->sta)
717 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
Johannes Berge6a98542008-10-21 12:40:02 +0200718
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700719 /*
720 * Lets not bother rate control if we're associated and cannot
721 * talk to the sta. This should not happen.
722 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200723 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700724 !rate_usable_index_exists(sband, &tx->sta->sta),
725 "%s: Dropped data frame as no usable bitrate found while "
726 "scanning and associated. Target station: "
727 "%pM on %d GHz band\n",
Johannes Berg47846c92009-11-25 17:46:19 +0100728 tx->sdata->name, hdr->addr1,
Johannes Berg2d565772012-07-23 15:12:51 +0200729 info->band ? 5 : 2))
Luis R. Rodriguezb770b432009-07-16 10:15:09 -0700730 return TX_DROP;
731
732 /*
733 * If we're associated with the sta at this point we know we can at
734 * least send the frame at the lowest bit rate.
735 */
Johannes Berge6a98542008-10-21 12:40:02 +0200736 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
737
Felix Fietkau0d528d82013-04-22 16:14:41 +0200738 if (tx->sta && !info->control.skip_table)
739 ratetbl = rcu_dereference(tx->sta->sta.rates);
740
741 if (unlikely(info->control.rates[0].idx < 0)) {
742 if (ratetbl) {
743 struct ieee80211_tx_rate rate = {
744 .idx = ratetbl->rate[0].idx,
745 .flags = ratetbl->rate[0].flags,
746 .count = ratetbl->rate[0].count
747 };
748
749 if (ratetbl->rate[0].idx < 0)
750 return TX_DROP;
751
752 tx->rate = rate;
753 } else {
754 return TX_DROP;
755 }
756 } else {
757 tx->rate = info->control.rates[0];
758 }
Johannes Berge6a98542008-10-21 12:40:02 +0200759
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100760 if (txrc.reported_rate.idx < 0) {
Felix Fietkau0d528d82013-04-22 16:14:41 +0200761 txrc.reported_rate = tx->rate;
Helmut Schaac1ce5a72010-12-01 16:34:45 +0100762 if (tx->sta && ieee80211_is_data(hdr->frame_control))
763 tx->sta->last_tx_rate = txrc.reported_rate;
764 } else if (tx->sta)
Johannes Berge6a98542008-10-21 12:40:02 +0200765 tx->sta->last_tx_rate = txrc.reported_rate;
766
Felix Fietkau0d528d82013-04-22 16:14:41 +0200767 if (ratetbl)
768 return TX_CONTINUE;
769
Johannes Berge6a98542008-10-21 12:40:02 +0200770 if (unlikely(!info->control.rates[0].count))
771 info->control.rates[0].count = 1;
772
Gábor Stefanik99551512009-04-23 19:36:14 +0200773 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
774 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
775 info->control.rates[0].count = 1;
776
Johannes Berg9ae54c82008-01-31 19:48:20 +0100777 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +0200778}
779
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100780static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
781{
782 u16 *seq = &sta->tid_seq[tid];
783 __le16 ret = cpu_to_le16(*seq);
784
785 /* Increase the sequence number. */
786 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
787
788 return ret;
789}
790
Johannes Bergd9e8a702008-06-30 15:10:44 +0200791static ieee80211_tx_result debug_noinline
Johannes Bergf591fa52008-07-10 11:21:26 +0200792ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
793{
794 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
795 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
Johannes Bergf591fa52008-07-10 11:21:26 +0200796 u8 *qc;
797 int tid;
798
Johannes Berg25d834e2008-09-12 22:52:47 +0200799 /*
800 * Packet injection may want to control the sequence
801 * number, if we have no matching interface then we
802 * neither assign one ourselves nor ask the driver to.
803 */
Johannes Berg5061b0c2009-07-14 00:33:34 +0200804 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
Johannes Berg25d834e2008-09-12 22:52:47 +0200805 return TX_CONTINUE;
806
Johannes Bergf591fa52008-07-10 11:21:26 +0200807 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
808 return TX_CONTINUE;
809
810 if (ieee80211_hdrlen(hdr->frame_control) < 24)
811 return TX_CONTINUE;
812
Johannes Berg49a59542011-09-29 16:04:41 +0200813 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
814 return TX_CONTINUE;
815
Johannes Berg94778282008-10-10 13:21:59 +0200816 /*
817 * Anything but QoS data that has a sequence number field
818 * (is long enough) gets a sequence number from the global
Bob Copelandc4c205f2013-08-23 09:35:38 -0400819 * counter. QoS data frames with a multicast destination
820 * also use the global counter (802.11-2012 9.3.2.10).
Johannes Berg94778282008-10-10 13:21:59 +0200821 */
Bob Copelandc4c205f2013-08-23 09:35:38 -0400822 if (!ieee80211_is_data_qos(hdr->frame_control) ||
823 is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg94778282008-10-10 13:21:59 +0200824 /* driver should assign sequence number */
Johannes Bergf591fa52008-07-10 11:21:26 +0200825 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
Johannes Berg94778282008-10-10 13:21:59 +0200826 /* for pure STA mode without beacons, we can do it */
827 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
828 tx->sdata->sequence_number += 0x10;
Johannes Berg79c892b2014-11-21 14:26:31 +0100829 if (tx->sta)
830 tx->sta->tx_msdu[IEEE80211_NUM_TIDS]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200831 return TX_CONTINUE;
832 }
833
834 /*
835 * This should be true for injected/management frames only, for
836 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
837 * above since they are not QoS-data frames.
838 */
839 if (!tx->sta)
840 return TX_CONTINUE;
841
842 /* include per-STA, per-TID sequence counter */
843
844 qc = ieee80211_get_qos_ctl(hdr);
845 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
Johannes Berg79c892b2014-11-21 14:26:31 +0100846 tx->sta->tx_msdu[tid]++;
Johannes Bergf591fa52008-07-10 11:21:26 +0200847
Felix Fietkauba8c3d62015-03-27 21:30:37 +0100848 if (!tx->sta->sta.txq[0])
849 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
Johannes Bergf591fa52008-07-10 11:21:26 +0200850
851 return TX_CONTINUE;
852}
853
Johannes Berg252b86c2011-11-16 15:28:55 +0100854static int ieee80211_fragment(struct ieee80211_tx_data *tx,
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100855 struct sk_buff *skb, int hdrlen,
856 int frag_threshold)
857{
Johannes Berg252b86c2011-11-16 15:28:55 +0100858 struct ieee80211_local *local = tx->local;
Johannes Berga1a3fce2011-11-16 15:28:56 +0100859 struct ieee80211_tx_info *info;
Johannes Berg252b86c2011-11-16 15:28:55 +0100860 struct sk_buff *tmp;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100861 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
862 int pos = hdrlen + per_fragm;
863 int rem = skb->len - hdrlen - per_fragm;
864
865 if (WARN_ON(rem < 0))
866 return -EINVAL;
867
Johannes Berg252b86c2011-11-16 15:28:55 +0100868 /* first fragment was already added to queue by caller */
869
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100870 while (rem) {
871 int fraglen = per_fragm;
872
873 if (fraglen > rem)
874 fraglen = rem;
875 rem -= fraglen;
876 tmp = dev_alloc_skb(local->tx_headroom +
877 frag_threshold +
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200878 tx->sdata->encrypt_headroom +
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100879 IEEE80211_ENCRYPT_TAILROOM);
880 if (!tmp)
881 return -ENOMEM;
Johannes Berg252b86c2011-11-16 15:28:55 +0100882
883 __skb_queue_tail(&tx->skbs, tmp);
884
Max Stepanov2475b1cc2013-03-24 14:23:27 +0200885 skb_reserve(tmp,
886 local->tx_headroom + tx->sdata->encrypt_headroom);
887
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100888 /* copy control information */
889 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
Johannes Berga1a3fce2011-11-16 15:28:56 +0100890
891 info = IEEE80211_SKB_CB(tmp);
892 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
893 IEEE80211_TX_CTL_FIRST_FRAGMENT);
894
895 if (rem)
896 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
897
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100898 skb_copy_queue_mapping(tmp, skb);
899 tmp->priority = skb->priority;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100900 tmp->dev = skb->dev;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100901
902 /* copy header and data */
903 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
904 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
905
906 pos += fraglen;
907 }
908
Johannes Berg252b86c2011-11-16 15:28:55 +0100909 /* adjust first fragment's length */
Johannes Berg338f9772014-02-01 00:16:23 +0100910 skb_trim(skb, hdrlen + per_fragm);
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100911 return 0;
912}
913
Johannes Bergf591fa52008-07-10 11:21:26 +0200914static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +0200915ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
916{
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100917 struct sk_buff *skb = tx->skb;
918 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
919 struct ieee80211_hdr *hdr = (void *)skb->data;
Jouni Malinenb9a5f8ca2009-04-20 18:39:05 +0200920 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100921 int hdrlen;
922 int fragnum;
Johannes Berge2454942008-05-15 12:55:28 +0200923
Johannes Berg252b86c2011-11-16 15:28:55 +0100924 /* no matter what happens, tx->skb moves to tx->skbs */
925 __skb_queue_tail(&tx->skbs, skb);
926 tx->skb = NULL;
927
Johannes Berga26eb272011-10-07 14:01:25 +0200928 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
929 return TX_CONTINUE;
930
931 if (tx->local->ops->set_frag_threshold)
Johannes Berge2454942008-05-15 12:55:28 +0200932 return TX_CONTINUE;
933
Johannes Bergeefce912008-05-17 00:57:13 +0200934 /*
935 * Warn when submitting a fragmented A-MPDU frame and drop it.
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200936 * This scenario is handled in ieee80211_tx_prepare but extra
Ron Rindjunsky8d5e0d52008-06-12 15:42:29 +0300937 * caution taken here as fragmented ampdu may cause Tx stop.
Johannes Bergeefce912008-05-17 00:57:13 +0200938 */
Sujith8b30b1f2008-10-24 09:55:27 +0530939 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
Johannes Bergeefce912008-05-17 00:57:13 +0200940 return TX_DROP;
941
Harvey Harrison065e96052008-06-22 16:45:27 -0700942 hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berge2454942008-05-15 12:55:28 +0200943
Johannes Berga26eb272011-10-07 14:01:25 +0200944 /* internal error, why isn't DONTFRAG set? */
Johannes Berg8ccd8f22009-04-29 23:35:56 +0200945 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100946 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200947
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100948 /*
949 * Now fragment the frame. This will allocate all the fragments and
950 * chain them (using skb as the first fragment) to skb->next.
951 * During transmission, we will remove the successfully transmitted
952 * fragments from this list. When the low-level driver rejects one
953 * of the fragments then we will simply pretend to accept the skb
954 * but store it away as pending.
955 */
Johannes Berg252b86c2011-11-16 15:28:55 +0100956 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100957 return TX_DROP;
Johannes Berge2454942008-05-15 12:55:28 +0200958
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100959 /* update duration/seq/flags of fragments */
960 fragnum = 0;
Johannes Berg252b86c2011-11-16 15:28:55 +0100961
962 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100963 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
Johannes Berge2454942008-05-15 12:55:28 +0200964
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100965 hdr = (void *)skb->data;
966 info = IEEE80211_SKB_CB(skb);
Johannes Berge6a98542008-10-21 12:40:02 +0200967
Johannes Berg252b86c2011-11-16 15:28:55 +0100968 if (!skb_queue_is_last(&tx->skbs, skb)) {
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100969 hdr->frame_control |= morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200970 /*
971 * No multi-rate retries for fragmented frames, that
972 * would completely throw off the NAV at other STAs.
973 */
974 info->control.rates[1].idx = -1;
975 info->control.rates[2].idx = -1;
976 info->control.rates[3].idx = -1;
Thomas Huehne3e1a0b2012-07-02 19:46:16 +0200977 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
Johannes Berge6a98542008-10-21 12:40:02 +0200978 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100979 } else {
980 hdr->frame_control &= ~morefrags;
Johannes Berge6a98542008-10-21 12:40:02 +0200981 }
Johannes Berg2de8e0d92009-03-23 17:28:35 +0100982 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
983 fragnum++;
Johannes Berg252b86c2011-11-16 15:28:55 +0100984 }
Johannes Berge2454942008-05-15 12:55:28 +0200985
986 return TX_CONTINUE;
Johannes Berge2454942008-05-15 12:55:28 +0200987}
988
Johannes Bergd9e8a702008-06-30 15:10:44 +0200989static ieee80211_tx_result debug_noinline
Johannes Bergfeff1f22009-08-10 16:01:54 +0200990ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
991{
Johannes Berg252b86c2011-11-16 15:28:55 +0100992 struct sk_buff *skb;
Johannes Berg560d2682013-02-05 10:55:21 +0100993 int ac = -1;
Johannes Bergfeff1f22009-08-10 16:01:54 +0200994
995 if (!tx->sta)
996 return TX_CONTINUE;
997
Johannes Berg252b86c2011-11-16 15:28:55 +0100998 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg560d2682013-02-05 10:55:21 +0100999 ac = skb_get_queue_mapping(skb);
Johannes Berg560d2682013-02-05 10:55:21 +01001000 tx->sta->tx_bytes[ac] += skb->len;
Johannes Berg252b86c2011-11-16 15:28:55 +01001001 }
Johannes Berg560d2682013-02-05 10:55:21 +01001002 if (ac >= 0)
1003 tx->sta->tx_packets[ac]++;
Johannes Bergfeff1f22009-08-10 16:01:54 +02001004
1005 return TX_CONTINUE;
1006}
1007
1008static ieee80211_tx_result debug_noinline
Johannes Berge2454942008-05-15 12:55:28 +02001009ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1010{
1011 if (!tx->key)
1012 return TX_CONTINUE;
1013
Johannes Berg97359d12010-08-10 09:46:38 +02001014 switch (tx->key->conf.cipher) {
1015 case WLAN_CIPHER_SUITE_WEP40:
1016 case WLAN_CIPHER_SUITE_WEP104:
Johannes Berge2454942008-05-15 12:55:28 +02001017 return ieee80211_crypto_wep_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001018 case WLAN_CIPHER_SUITE_TKIP:
Johannes Berge2454942008-05-15 12:55:28 +02001019 return ieee80211_crypto_tkip_encrypt(tx);
Johannes Berg97359d12010-08-10 09:46:38 +02001020 case WLAN_CIPHER_SUITE_CCMP:
Jouni Malinen2b2ba0d2015-01-24 19:52:07 +02001021 return ieee80211_crypto_ccmp_encrypt(
1022 tx, IEEE80211_CCMP_MIC_LEN);
1023 case WLAN_CIPHER_SUITE_CCMP_256:
1024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_256_MIC_LEN);
Johannes Berg97359d12010-08-10 09:46:38 +02001026 case WLAN_CIPHER_SUITE_AES_CMAC:
Jouni Malinen3cfcf6ac2009-01-08 13:32:02 +02001027 return ieee80211_crypto_aes_cmac_encrypt(tx);
Jouni Malinen56c52da2015-01-24 19:52:08 +02001028 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1029 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
Jouni Malinen8ade5382015-01-24 19:52:09 +02001030 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1031 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1032 return ieee80211_crypto_aes_gmac_encrypt(tx);
Jouni Malinen00b9cfa2015-01-24 19:52:06 +02001033 case WLAN_CIPHER_SUITE_GCMP:
1034 case WLAN_CIPHER_SUITE_GCMP_256:
1035 return ieee80211_crypto_gcmp_encrypt(tx);
Johannes Berg3ffc2a92010-08-27 14:26:52 +03001036 default:
Yoni Divinskyd32a1022012-01-16 15:18:59 +02001037 return ieee80211_crypto_hw_encrypt(tx);
Johannes Berge2454942008-05-15 12:55:28 +02001038 }
1039
Johannes Berge2454942008-05-15 12:55:28 +02001040 return TX_DROP;
1041}
1042
Johannes Bergd9e8a702008-06-30 15:10:44 +02001043static ieee80211_tx_result debug_noinline
Johannes Berg03f93c32008-06-25 14:36:27 +03001044ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1045{
Johannes Berg252b86c2011-11-16 15:28:55 +01001046 struct sk_buff *skb;
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001047 struct ieee80211_hdr *hdr;
1048 int next_len;
1049 bool group_addr;
Johannes Berg03f93c32008-06-25 14:36:27 +03001050
Johannes Berg252b86c2011-11-16 15:28:55 +01001051 skb_queue_walk(&tx->skbs, skb) {
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001052 hdr = (void *) skb->data;
Jouni Malinen7e0aae42009-05-19 19:25:58 +03001053 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1054 break; /* must not overwrite AID */
Johannes Berg252b86c2011-11-16 15:28:55 +01001055 if (!skb_queue_is_last(&tx->skbs, skb)) {
1056 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1057 next_len = next->len;
1058 } else
1059 next_len = 0;
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001060 group_addr = is_multicast_ether_addr(hdr->addr1);
Johannes Berg03f93c32008-06-25 14:36:27 +03001061
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001062 hdr->duration_id =
Johannes Berg252b86c2011-11-16 15:28:55 +01001063 ieee80211_duration(tx, skb, group_addr, next_len);
1064 }
Johannes Berg03f93c32008-06-25 14:36:27 +03001065
1066 return TX_CONTINUE;
1067}
1068
Johannes Berge2ebc742007-07-27 15:43:22 +02001069/* actual transmit path */
1070
Johannes Berga622ab72010-06-10 10:21:39 +02001071static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1072 struct sk_buff *skb,
1073 struct ieee80211_tx_info *info,
1074 struct tid_ampdu_tx *tid_tx,
1075 int tid)
1076{
1077 bool queued = false;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001078 bool reset_agg_timer = false;
Helmut Schaaaa454582012-03-07 17:20:30 +01001079 struct sk_buff *purge_skb = NULL;
Johannes Berga622ab72010-06-10 10:21:39 +02001080
1081 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1082 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001083 reset_agg_timer = true;
Johannes Berg0ab33702010-06-10 10:21:42 +02001084 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1085 /*
1086 * nothing -- this aggregation session is being started
1087 * but that might still fail with the driver
1088 */
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001089 } else if (!tx->sta->sta.txq[tid]) {
Johannes Berga622ab72010-06-10 10:21:39 +02001090 spin_lock(&tx->sta->lock);
1091 /*
1092 * Need to re-check now, because we may get here
1093 *
1094 * 1) in the window during which the setup is actually
1095 * already done, but not marked yet because not all
1096 * packets are spliced over to the driver pending
1097 * queue yet -- if this happened we acquire the lock
1098 * either before or after the splice happens, but
1099 * need to recheck which of these cases happened.
1100 *
1101 * 2) during session teardown, if the OPERATIONAL bit
1102 * was cleared due to the teardown but the pointer
1103 * hasn't been assigned NULL yet (or we loaded it
1104 * before it was assigned) -- in this case it may
1105 * now be NULL which means we should just let the
1106 * packet pass through because splicing the frames
1107 * back is already done.
1108 */
Johannes Berg40b275b2011-05-13 14:15:49 +02001109 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
Johannes Berga622ab72010-06-10 10:21:39 +02001110
1111 if (!tid_tx) {
1112 /* do nothing, let packet pass through */
1113 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1114 info->flags |= IEEE80211_TX_CTL_AMPDU;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001115 reset_agg_timer = true;
Johannes Berga622ab72010-06-10 10:21:39 +02001116 } else {
1117 queued = true;
1118 info->control.vif = &tx->sdata->vif;
1119 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
Michal Kaziore9de0192015-07-02 09:59:56 +02001120 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS |
1121 IEEE80211_TX_CTL_NO_PS_BUFFER |
1122 IEEE80211_TX_STATUS_EOSP;
Johannes Berga622ab72010-06-10 10:21:39 +02001123 __skb_queue_tail(&tid_tx->pending, skb);
Helmut Schaaaa454582012-03-07 17:20:30 +01001124 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1125 purge_skb = __skb_dequeue(&tid_tx->pending);
Johannes Berga622ab72010-06-10 10:21:39 +02001126 }
1127 spin_unlock(&tx->sta->lock);
Helmut Schaaaa454582012-03-07 17:20:30 +01001128
1129 if (purge_skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001130 ieee80211_free_txskb(&tx->local->hw, purge_skb);
Johannes Berga622ab72010-06-10 10:21:39 +02001131 }
1132
Nikolay Martynov285fa692011-11-22 21:50:28 -05001133 /* reset session timer */
1134 if (reset_agg_timer && tid_tx->timeout)
Felix Fietkau12d3952f2012-03-18 22:58:06 +01001135 tid_tx->last_tx = jiffies;
Nikolay Martynov285fa692011-11-22 21:50:28 -05001136
Johannes Berga622ab72010-06-10 10:21:39 +02001137 return queued;
1138}
1139
Johannes Berg58d41852007-09-26 17:53:18 +02001140/*
1141 * initialises @tx
Johannes Berg7c107702015-03-20 14:18:27 +01001142 * pass %NULL for the station if unknown, a valid pointer if known
1143 * or an ERR_PTR() if the station is known not to exist
Johannes Berg58d41852007-09-26 17:53:18 +02001144 */
Johannes Berg9ae54c82008-01-31 19:48:20 +01001145static ieee80211_tx_result
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001146ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1147 struct ieee80211_tx_data *tx,
Johannes Berg7c107702015-03-20 14:18:27 +01001148 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001149{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001150 struct ieee80211_local *local = sdata->local;
Johannes Berg58d41852007-09-26 17:53:18 +02001151 struct ieee80211_hdr *hdr;
Johannes Berge039fa42008-05-15 12:55:29 +02001152 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg68f2b512011-10-07 14:01:24 +02001153 int tid;
Johannes Berga622ab72010-06-10 10:21:39 +02001154 u8 *qc;
Johannes Berge2ebc742007-07-27 15:43:22 +02001155
1156 memset(tx, 0, sizeof(*tx));
1157 tx->skb = skb;
Johannes Berge2ebc742007-07-27 15:43:22 +02001158 tx->local = local;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001159 tx->sdata = sdata;
Johannes Berg252b86c2011-11-16 15:28:55 +01001160 __skb_queue_head_init(&tx->skbs);
Johannes Berge2ebc742007-07-27 15:43:22 +02001161
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001162 /*
1163 * If this flag is set to true anywhere, and we get here,
1164 * we are doing the needed processing, so remove the flag
1165 * now.
1166 */
1167 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1168
Johannes Berg58d41852007-09-26 17:53:18 +02001169 hdr = (struct ieee80211_hdr *) skb->data;
1170
Johannes Berg7c107702015-03-20 14:18:27 +01001171 if (likely(sta)) {
1172 if (!IS_ERR(sta))
1173 tx->sta = sta;
1174 } else {
1175 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1176 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1177 if (!tx->sta && sdata->wdev.use_4addr)
1178 return TX_DROP;
1179 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1180 IEEE80211_TX_CTL_INJECTED) ||
1181 tx->sdata->control_port_protocol == tx->skb->protocol) {
1182 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1183 }
1184 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1185 tx->sta = sta_info_get(sdata, hdr->addr1);
Felix Fietkau3f0e0b22010-01-08 18:15:13 +01001186 }
Johannes Berg58d41852007-09-26 17:53:18 +02001187
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001188 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
Johannes Berg49a59542011-09-29 16:04:41 +02001189 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001190 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1191 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001192 struct tid_ampdu_tx *tid_tx;
1193
Sujith8b30b1f2008-10-24 09:55:27 +05301194 qc = ieee80211_get_qos_ctl(hdr);
1195 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1196
Johannes Berga622ab72010-06-10 10:21:39 +02001197 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1198 if (tid_tx) {
1199 bool queued;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001200
Johannes Berga622ab72010-06-10 10:21:39 +02001201 queued = ieee80211_tx_prep_agg(tx, skb, info,
1202 tid_tx, tid);
1203
1204 if (unlikely(queued))
1205 return TX_QUEUED;
1206 }
Sujith8b30b1f2008-10-24 09:55:27 +05301207 }
1208
Jiri Slabybadffb72007-08-28 17:01:54 -04001209 if (is_multicast_ether_addr(hdr->addr1)) {
Johannes Berg5cf121c2008-02-25 16:27:43 +01001210 tx->flags &= ~IEEE80211_TX_UNICAST;
Johannes Berge039fa42008-05-15 12:55:29 +02001211 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Simon Wunderlich6fd67e92011-11-18 14:20:42 +01001212 } else
Johannes Berg5cf121c2008-02-25 16:27:43 +01001213 tx->flags |= IEEE80211_TX_UNICAST;
Johannes Berg58d41852007-09-26 17:53:18 +02001214
Johannes Berga26eb272011-10-07 14:01:25 +02001215 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1216 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1217 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1218 info->flags & IEEE80211_TX_CTL_AMPDU)
1219 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
Johannes Berg58d41852007-09-26 17:53:18 +02001220 }
1221
Johannes Berge2ebc742007-07-27 15:43:22 +02001222 if (!tx->sta)
Johannes Berge039fa42008-05-15 12:55:29 +02001223 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02001224 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
Johannes Berge039fa42008-05-15 12:55:29 +02001225 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
Johannes Berg58d41852007-09-26 17:53:18 +02001226
Johannes Berge039fa42008-05-15 12:55:29 +02001227 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge2ebc742007-07-27 15:43:22 +02001228
Johannes Berg9ae54c82008-01-31 19:48:20 +01001229 return TX_CONTINUE;
Johannes Berge2ebc742007-07-27 15:43:22 +02001230}
1231
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001232static void ieee80211_drv_tx(struct ieee80211_local *local,
1233 struct ieee80211_vif *vif,
1234 struct ieee80211_sta *pubsta,
1235 struct sk_buff *skb)
1236{
1237 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1238 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1239 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1240 struct ieee80211_tx_control control = {
1241 .sta = pubsta,
1242 };
1243 struct ieee80211_txq *txq = NULL;
1244 struct txq_info *txqi;
1245 u8 ac;
1246
1247 if (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)
1248 goto tx_normal;
1249
1250 if (!ieee80211_is_data(hdr->frame_control))
1251 goto tx_normal;
1252
1253 if (pubsta) {
1254 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1255
1256 txq = pubsta->txq[tid];
1257 } else if (vif) {
1258 txq = vif->txq;
1259 }
1260
1261 if (!txq)
1262 goto tx_normal;
1263
1264 ac = txq->ac;
1265 txqi = to_txq_info(txq);
1266 atomic_inc(&sdata->txqs_len[ac]);
1267 if (atomic_read(&sdata->txqs_len[ac]) >= local->hw.txq_ac_max_pending)
1268 netif_stop_subqueue(sdata->dev, ac);
1269
1270 skb_queue_tail(&txqi->queue, skb);
1271 drv_wake_tx_queue(local, txqi);
1272
1273 return;
1274
1275tx_normal:
1276 drv_tx(local, &control, skb);
1277}
1278
1279struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
1280 struct ieee80211_txq *txq)
1281{
1282 struct ieee80211_local *local = hw_to_local(hw);
1283 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
1284 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
1285 struct ieee80211_hdr *hdr;
1286 struct sk_buff *skb = NULL;
1287 u8 ac = txq->ac;
1288
1289 spin_lock_bh(&txqi->queue.lock);
1290
1291 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
1292 goto out;
1293
1294 skb = __skb_dequeue(&txqi->queue);
1295 if (!skb)
1296 goto out;
1297
1298 atomic_dec(&sdata->txqs_len[ac]);
1299 if (__netif_subqueue_stopped(sdata->dev, ac))
1300 ieee80211_propagate_queue_wake(local, sdata->vif.hw_queue[ac]);
1301
1302 hdr = (struct ieee80211_hdr *)skb->data;
1303 if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) {
1304 struct sta_info *sta = container_of(txq->sta, struct sta_info,
1305 sta);
1306 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1307
1308 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, txq->tid);
1309 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
1310 info->flags |= IEEE80211_TX_CTL_AMPDU;
1311 else
1312 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1313 }
1314
1315out:
1316 spin_unlock_bh(&txqi->queue.lock);
1317
1318 return skb;
1319}
1320EXPORT_SYMBOL(ieee80211_tx_dequeue);
1321
Johannes Berg11127e92011-11-16 16:02:47 +01001322static bool ieee80211_tx_frags(struct ieee80211_local *local,
1323 struct ieee80211_vif *vif,
1324 struct ieee80211_sta *sta,
1325 struct sk_buff_head *skbs,
1326 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001327{
Johannes Berg252b86c2011-11-16 15:28:55 +01001328 struct sk_buff *skb, *tmp;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001329 unsigned long flags;
Johannes Berge2ebc742007-07-27 15:43:22 +02001330
Johannes Berg252b86c2011-11-16 15:28:55 +01001331 skb_queue_walk_safe(skbs, skb, tmp) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001332 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1333 int q = info->hw_queue;
1334
1335#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1336 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1337 __skb_unlink(skb, skbs);
Felix Fietkauc3e77242012-10-08 14:39:33 +02001338 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001339 continue;
1340 }
1341#endif
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001342
1343 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001344 if (local->queue_stop_reasons[q] ||
Johannes Berg7bb45682011-02-24 14:42:06 +01001345 (!txpending && !skb_queue_empty(&local->pending[q]))) {
Seth Forshee6c17b772013-02-11 11:21:07 -06001346 if (unlikely(info->flags &
Seth Forsheea7679ed2013-02-25 14:58:05 -06001347 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1348 if (local->queue_stop_reasons[q] &
1349 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1350 /*
1351 * Drop off-channel frames if queues
1352 * are stopped for any reason other
1353 * than off-channel operation. Never
1354 * queue them.
1355 */
1356 spin_unlock_irqrestore(
1357 &local->queue_stop_reason_lock,
1358 flags);
1359 ieee80211_purge_tx_queue(&local->hw,
1360 skbs);
1361 return true;
1362 }
1363 } else {
1364
Seth Forshee6c17b772013-02-11 11:21:07 -06001365 /*
Seth Forsheea7679ed2013-02-25 14:58:05 -06001366 * Since queue is stopped, queue up frames for
1367 * later transmission from the tx-pending
1368 * tasklet when the queue is woken again.
Seth Forshee6c17b772013-02-11 11:21:07 -06001369 */
Seth Forsheea7679ed2013-02-25 14:58:05 -06001370 if (txpending)
1371 skb_queue_splice_init(skbs,
1372 &local->pending[q]);
1373 else
1374 skb_queue_splice_tail_init(skbs,
1375 &local->pending[q]);
1376
1377 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1378 flags);
1379 return false;
Seth Forshee6c17b772013-02-11 11:21:07 -06001380 }
Johannes Berg7bb45682011-02-24 14:42:06 +01001381 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001382 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Tomas Winklerf8e79dd2008-07-24 18:46:44 +03001383
Johannes Berg11127e92011-11-16 16:02:47 +01001384 info->control.vif = vif;
Johannes Bergec25acc2010-07-22 17:11:28 +02001385
Johannes Berg252b86c2011-11-16 15:28:55 +01001386 __skb_unlink(skb, skbs);
Felix Fietkauba8c3d62015-03-27 21:30:37 +01001387 ieee80211_drv_tx(local, vif, sta, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001388 }
Johannes Berg2de8e0d92009-03-23 17:28:35 +01001389
Johannes Berg11127e92011-11-16 16:02:47 +01001390 return true;
1391}
1392
1393/*
1394 * Returns false if the frame couldn't be transmitted but was queued instead.
1395 */
1396static bool __ieee80211_tx(struct ieee80211_local *local,
1397 struct sk_buff_head *skbs, int led_len,
1398 struct sta_info *sta, bool txpending)
1399{
1400 struct ieee80211_tx_info *info;
1401 struct ieee80211_sub_if_data *sdata;
1402 struct ieee80211_vif *vif;
1403 struct ieee80211_sta *pubsta;
1404 struct sk_buff *skb;
1405 bool result = true;
1406 __le16 fc;
1407
1408 if (WARN_ON(skb_queue_empty(skbs)))
1409 return true;
1410
1411 skb = skb_peek(skbs);
1412 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1413 info = IEEE80211_SKB_CB(skb);
1414 sdata = vif_to_sdata(info->control.vif);
1415 if (sta && !sta->uploaded)
1416 sta = NULL;
1417
1418 if (sta)
1419 pubsta = &sta->sta;
1420 else
1421 pubsta = NULL;
1422
1423 switch (sdata->vif.type) {
1424 case NL80211_IFTYPE_MONITOR:
Johannes Bergc82b5a72013-07-14 23:39:20 +03001425 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
1426 vif = &sdata->vif;
1427 break;
1428 }
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001429 sdata = rcu_dereference(local->monitor_sdata);
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001430 if (sdata) {
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001431 vif = &sdata->vif;
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001432 info->hw_queue =
1433 vif->hw_queue[skb_get_queue_mapping(skb)];
Johannes Berg30686bf2015-06-02 21:39:54 +02001434 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001435 dev_kfree_skb(skb);
1436 return true;
1437 } else
Johannes Berg4b6f1dd2012-04-03 14:35:57 +02001438 vif = NULL;
Johannes Berg11127e92011-11-16 16:02:47 +01001439 break;
1440 case NL80211_IFTYPE_AP_VLAN:
1441 sdata = container_of(sdata->bss,
1442 struct ieee80211_sub_if_data, u.ap);
1443 /* fall through */
1444 default:
1445 vif = &sdata->vif;
1446 break;
1447 }
1448
Johannes Bergcb831b52012-07-02 15:40:18 +02001449 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1450 txpending);
Johannes Berg11127e92011-11-16 16:02:47 +01001451
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001452 ieee80211_tpt_led_trig_tx(local, fc, led_len);
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001453
Johannes Berg4db4e0a2011-11-24 14:47:36 +01001454 WARN_ON_ONCE(!skb_queue_empty(skbs));
Johannes Berg252b86c2011-11-16 15:28:55 +01001455
Johannes Berg11127e92011-11-16 16:02:47 +01001456 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001457}
1458
Johannes Berg97b045d2008-06-20 01:22:30 +02001459/*
1460 * Invoke TX handlers, return 0 on success and non-zero if the
1461 * frame was dropped or queued.
1462 */
1463static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1464{
Johannes Berg252b86c2011-11-16 15:28:55 +01001465 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
Johannes Berg97b045d2008-06-20 01:22:30 +02001466 ieee80211_tx_result res = TX_DROP;
Johannes Berg97b045d2008-06-20 01:22:30 +02001467
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001468#define CALL_TXH(txh) \
1469 do { \
1470 res = txh(tx); \
1471 if (res != TX_CONTINUE) \
1472 goto txh_done; \
1473 } while (0)
Johannes Berg97b045d2008-06-20 01:22:30 +02001474
Kalle Valo5c1b98a2010-01-12 10:42:46 +02001475 CALL_TXH(ieee80211_tx_h_dynamic_ps);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001476 CALL_TXH(ieee80211_tx_h_check_assoc);
1477 CALL_TXH(ieee80211_tx_h_ps_buf);
Johannes Berga621fa42010-08-27 14:26:54 +03001478 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001479 CALL_TXH(ieee80211_tx_h_select_key);
Johannes Berg30686bf2015-06-02 21:39:54 +02001480 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Johannes Bergaf65cd962009-11-17 18:18:36 +01001481 CALL_TXH(ieee80211_tx_h_rate_ctrl);
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001482
Johannes Bergaa5b5492011-12-02 22:08:52 +01001483 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1484 __skb_queue_tail(&tx->skbs, tx->skb);
1485 tx->skb = NULL;
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001486 goto txh_done;
Johannes Bergaa5b5492011-12-02 22:08:52 +01001487 }
Johannes Bergc6fcf6b2010-01-17 01:47:59 +01001488
1489 CALL_TXH(ieee80211_tx_h_michael_mic_add);
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001490 CALL_TXH(ieee80211_tx_h_sequence);
1491 CALL_TXH(ieee80211_tx_h_fragment);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001492 /* handlers after fragment must be aware of tx info fragmentation! */
Johannes Berg9aa4aee2009-10-29 08:43:48 +01001493 CALL_TXH(ieee80211_tx_h_stats);
1494 CALL_TXH(ieee80211_tx_h_encrypt);
Johannes Berg30686bf2015-06-02 21:39:54 +02001495 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
Arik Nemtsov8fd369e2011-01-31 22:29:12 +02001496 CALL_TXH(ieee80211_tx_h_calculate_duration);
Johannes Bergd9e8a702008-06-30 15:10:44 +02001497#undef CALL_TXH
1498
1499 txh_done:
Johannes Berg97b045d2008-06-20 01:22:30 +02001500 if (unlikely(res == TX_DROP)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001501 I802_DEBUG_INC(tx->local->tx_handlers_drop);
Johannes Berg252b86c2011-11-16 15:28:55 +01001502 if (tx->skb)
Felix Fietkauc3e77242012-10-08 14:39:33 +02001503 ieee80211_free_txskb(&tx->local->hw, tx->skb);
Johannes Berg252b86c2011-11-16 15:28:55 +01001504 else
Felix Fietkau1f98ab72012-11-10 03:44:14 +01001505 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
Johannes Berg97b045d2008-06-20 01:22:30 +02001506 return -1;
1507 } else if (unlikely(res == TX_QUEUED)) {
Tomas Winkler5479d0e2008-06-28 03:15:03 +03001508 I802_DEBUG_INC(tx->local->tx_handlers_queued);
Johannes Berg97b045d2008-06-20 01:22:30 +02001509 return -1;
1510 }
1511
1512 return 0;
1513}
1514
Felix Fietkau06be6b12013-10-14 18:01:00 +02001515bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1516 struct ieee80211_vif *vif, struct sk_buff *skb,
1517 int band, struct ieee80211_sta **sta)
1518{
1519 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1520 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1521 struct ieee80211_tx_data tx;
Johannes Berg88724a82015-03-01 09:10:12 +02001522 struct sk_buff *skb2;
Felix Fietkau06be6b12013-10-14 18:01:00 +02001523
Johannes Berg7c107702015-03-20 14:18:27 +01001524 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
Felix Fietkau06be6b12013-10-14 18:01:00 +02001525 return false;
1526
1527 info->band = band;
1528 info->control.vif = vif;
1529 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1530
1531 if (invoke_tx_handlers(&tx))
1532 return false;
1533
1534 if (sta) {
1535 if (tx.sta)
1536 *sta = &tx.sta->sta;
1537 else
1538 *sta = NULL;
1539 }
1540
Johannes Berg88724a82015-03-01 09:10:12 +02001541 /* this function isn't suitable for fragmented data frames */
1542 skb2 = __skb_dequeue(&tx.skbs);
1543 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1544 ieee80211_free_txskb(hw, skb2);
1545 ieee80211_purge_tx_queue(hw, &tx.skbs);
1546 return false;
1547 }
1548
Felix Fietkau06be6b12013-10-14 18:01:00 +02001549 return true;
1550}
1551EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1552
Johannes Berg7bb45682011-02-24 14:42:06 +01001553/*
1554 * Returns false if the frame couldn't be transmitted but was queued instead.
1555 */
1556static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01001557 struct sta_info *sta, struct sk_buff *skb,
1558 bool txpending)
Johannes Berge2ebc742007-07-27 15:43:22 +02001559{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001560 struct ieee80211_local *local = sdata->local;
Johannes Berg5cf121c2008-02-25 16:27:43 +01001561 struct ieee80211_tx_data tx;
Johannes Berg97b045d2008-06-20 01:22:30 +02001562 ieee80211_tx_result res_prepare;
Johannes Berge039fa42008-05-15 12:55:29 +02001563 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001564 bool result = true;
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001565 int led_len;
Johannes Berge2ebc742007-07-27 15:43:22 +02001566
Johannes Berge2ebc742007-07-27 15:43:22 +02001567 if (unlikely(skb->len < 10)) {
1568 dev_kfree_skb(skb);
Johannes Berg7bb45682011-02-24 14:42:06 +01001569 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001570 }
1571
Johannes Berg58d41852007-09-26 17:53:18 +02001572 /* initialises tx */
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001573 led_len = skb->len;
Johannes Berg7c107702015-03-20 14:18:27 +01001574 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02001575
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001576 if (unlikely(res_prepare == TX_DROP)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001577 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg55de9082012-07-26 17:24:39 +02001578 return true;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001579 } else if (unlikely(res_prepare == TX_QUEUED)) {
Johannes Berg55de9082012-07-26 17:24:39 +02001580 return true;
Johannes Berge2ebc742007-07-27 15:43:22 +02001581 }
1582
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001583 /* set up hw_queue value early */
1584 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
Johannes Berg30686bf2015-06-02 21:39:54 +02001585 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02001586 info->hw_queue =
1587 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1588
Johannes Berg7bb45682011-02-24 14:42:06 +01001589 if (!invoke_tx_handlers(&tx))
Johannes Berg74e4dbf2011-11-16 15:28:57 +01001590 result = __ieee80211_tx(local, &tx.skbs, led_len,
1591 tx.sta, txpending);
Johannes Berg55de9082012-07-26 17:24:39 +02001592
Johannes Berg7bb45682011-02-24 14:42:06 +01001593 return result;
Johannes Berge2ebc742007-07-27 15:43:22 +02001594}
1595
1596/* device xmit handlers */
1597
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301598static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
Johannes Berg23c07522008-05-29 10:38:53 +02001599 struct sk_buff *skb,
1600 int head_need, bool may_encrypt)
1601{
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301602 struct ieee80211_local *local = sdata->local;
Johannes Berg23c07522008-05-29 10:38:53 +02001603 int tail_need = 0;
1604
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301605 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
Johannes Berg23c07522008-05-29 10:38:53 +02001606 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1607 tail_need -= skb_tailroom(skb);
1608 tail_need = max_t(int, tail_need, 0);
1609 }
1610
Ido Yarivc70f59a2014-07-29 15:39:14 +03001611 if (skb_cloned(skb) &&
Johannes Berg30686bf2015-06-02 21:39:54 +02001612 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
Ido Yarivc70f59a2014-07-29 15:39:14 +03001613 !skb_clone_writable(skb, ETH_HLEN) ||
Johannes Berg17c18bf2015-03-21 15:25:43 +01001614 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
Johannes Berg23c07522008-05-29 10:38:53 +02001615 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001616 else if (head_need || tail_need)
Johannes Berg23c07522008-05-29 10:38:53 +02001617 I802_DEBUG_INC(local->tx_expand_skb_head);
Felix Fietkau4cd06a32010-12-18 19:30:49 +01001618 else
1619 return 0;
Johannes Berg23c07522008-05-29 10:38:53 +02001620
1621 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
Joe Perches0fb9a9e2010-08-20 16:25:38 -07001622 wiphy_debug(local->hw.wiphy,
1623 "failed to reallocate TX buffer\n");
Johannes Berg23c07522008-05-29 10:38:53 +02001624 return -ENOMEM;
1625 }
1626
Johannes Berg23c07522008-05-29 10:38:53 +02001627 return 0;
1628}
1629
Johannes Berg7c107702015-03-20 14:18:27 +01001630void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1631 struct sta_info *sta, struct sk_buff *skb)
Johannes Berge2ebc742007-07-27 15:43:22 +02001632{
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001633 struct ieee80211_local *local = sdata->local;
Johannes Berge039fa42008-05-15 12:55:29 +02001634 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Luis Carlos Coboe32f85f2008-08-05 19:34:52 +02001635 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berge2ebc742007-07-27 15:43:22 +02001636 int headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001637 bool may_encrypt;
Johannes Berge2ebc742007-07-27 15:43:22 +02001638
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001639 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
Johannes Berg23c07522008-05-29 10:38:53 +02001640
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001641 headroom = local->tx_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001642 if (may_encrypt)
Max Stepanov2475b1cc2013-03-24 14:23:27 +02001643 headroom += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02001644 headroom -= skb_headroom(skb);
1645 headroom = max_t(int, 0, headroom);
1646
Yogesh Ashok Powar3bff1862011-06-28 18:41:37 +05301647 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02001648 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001649 return;
Johannes Berge2ebc742007-07-27 15:43:22 +02001650 }
1651
Steve deRosier740c1aa2010-09-11 20:01:31 -07001652 hdr = (struct ieee80211_hdr *) skb->data;
Johannes Berg5061b0c2009-07-14 00:33:34 +02001653 info->control.vif = &sdata->vif;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01001654
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001655 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1656 if (ieee80211_is_data(hdr->frame_control) &&
1657 is_unicast_ether_addr(hdr->addr1)) {
Johannes Bergbf7cd942013-02-15 14:40:31 +01001658 if (mesh_nexthop_resolve(sdata, skb))
Marco Porsch3f52b7e2013-01-30 18:14:08 +01001659 return; /* skb queued: don't free */
1660 } else {
1661 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1662 }
Johannes Berg98aed9f2012-03-27 14:18:36 +02001663 }
Javier Cardonacca89492009-08-10 17:29:29 -07001664
Javier Cardona2154c81c2011-09-07 17:49:53 -07001665 ieee80211_set_qos_hdr(sdata, skb);
Johannes Berg7c107702015-03-20 14:18:27 +01001666 ieee80211_tx(sdata, sta, skb, false);
Johannes Berge2ebc742007-07-27 15:43:22 +02001667}
1668
Johannes Berg73b9f032011-10-07 14:01:26 +02001669static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb)
1670{
1671 struct ieee80211_radiotap_iterator iterator;
1672 struct ieee80211_radiotap_header *rthdr =
1673 (struct ieee80211_radiotap_header *) skb->data;
1674 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1675 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1676 NULL);
1677 u16 txflags;
1678
1679 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1680 IEEE80211_TX_CTL_DONTFRAG;
1681
1682 /*
1683 * for every radiotap entry that is present
1684 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1685 * entries present, or -EINVAL on error)
1686 */
1687
1688 while (!ret) {
1689 ret = ieee80211_radiotap_iterator_next(&iterator);
1690
1691 if (ret)
1692 continue;
1693
1694 /* see if this argument is something we can use */
1695 switch (iterator.this_arg_index) {
1696 /*
1697 * You must take care when dereferencing iterator.this_arg
1698 * for multibyte types... the pointer is not aligned. Use
1699 * get_unaligned((type *)iterator.this_arg) to dereference
1700 * iterator.this_arg for type "type" safely on all arches.
1701 */
1702 case IEEE80211_RADIOTAP_FLAGS:
1703 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1704 /*
1705 * this indicates that the skb we have been
1706 * handed has the 32-bit FCS CRC at the end...
1707 * we should react to that by snipping it off
1708 * because it will be recomputed and added
1709 * on transmission
1710 */
1711 if (skb->len < (iterator._max_length + FCS_LEN))
1712 return false;
1713
1714 skb_trim(skb, skb->len - FCS_LEN);
1715 }
1716 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1717 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1718 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1719 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1720 break;
1721
1722 case IEEE80211_RADIOTAP_TX_FLAGS:
1723 txflags = get_unaligned_le16(iterator.this_arg);
1724 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1725 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1726 break;
1727
1728 /*
1729 * Please update the file
1730 * Documentation/networking/mac80211-injection.txt
1731 * when parsing new fields here.
1732 */
1733
1734 default:
1735 break;
1736 }
1737 }
1738
1739 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
1740 return false;
1741
1742 /*
1743 * remove the radiotap header
1744 * iterator->_max_length was sanity-checked against
1745 * skb->len by iterator init
1746 */
1747 skb_pull(skb, iterator._max_length);
1748
1749 return true;
1750}
1751
Stephen Hemmingerd0cf9c02009-08-31 19:50:57 +00001752netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1753 struct net_device *dev)
Johannes Berge2ebc742007-07-27 15:43:22 +02001754{
1755 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
Johannes Berg55de9082012-07-26 17:24:39 +02001756 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02001757 struct ieee80211_radiotap_header *prthdr =
1758 (struct ieee80211_radiotap_header *)skb->data;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001759 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02001760 struct ieee80211_hdr *hdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001761 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001762 struct cfg80211_chan_def *chandef;
Andy Green9b8a74e2007-07-27 15:43:24 +02001763 u16 len_rthdr;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001764 int hdrlen;
Johannes Berge2ebc742007-07-27 15:43:22 +02001765
Andy Green9b8a74e2007-07-27 15:43:24 +02001766 /* check for not even having the fixed radiotap header part */
1767 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
1768 goto fail; /* too short to be possibly valid */
1769
1770 /* is it a header version we can trust to find length from? */
1771 if (unlikely(prthdr->it_version))
1772 goto fail; /* only version 0 is supported */
1773
1774 /* then there must be a radiotap header with a length we can use */
1775 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1776
1777 /* does the skb contain enough to deliver on the alleged length? */
1778 if (unlikely(skb->len < len_rthdr))
1779 goto fail; /* skb too short for claimed rt header extent */
Johannes Berge2ebc742007-07-27 15:43:22 +02001780
Johannes Berge2ebc742007-07-27 15:43:22 +02001781 /*
1782 * fix up the pointers accounting for the radiotap
1783 * header still being in there. We are being given
1784 * a precooked IEEE80211 header so no need for
1785 * normal processing
1786 */
Andy Green9b8a74e2007-07-27 15:43:24 +02001787 skb_set_mac_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02001788 /*
Andy Green9b8a74e2007-07-27 15:43:24 +02001789 * these are just fixed to the end of the rt area since we
1790 * don't have any better information and at this point, nobody cares
Johannes Berge2ebc742007-07-27 15:43:22 +02001791 */
Andy Green9b8a74e2007-07-27 15:43:24 +02001792 skb_set_network_header(skb, len_rthdr);
1793 skb_set_transport_header(skb, len_rthdr);
Johannes Berge2ebc742007-07-27 15:43:22 +02001794
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001795 if (skb->len < len_rthdr + 2)
1796 goto fail;
1797
1798 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1799 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1800
1801 if (skb->len < len_rthdr + hdrlen)
1802 goto fail;
1803
Helmut Schaaf75f5c62011-08-01 11:32:52 +02001804 /*
1805 * Initialize skb->protocol if the injected frame is a data frame
1806 * carrying a rfc1042 header
1807 */
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001808 if (ieee80211_is_data(hdr->frame_control) &&
1809 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
1810 u8 *payload = (u8 *)hdr + hdrlen;
1811
Joe Perchesb203ca32012-05-08 18:56:52 +00001812 if (ether_addr_equal(payload, rfc1042_header))
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001813 skb->protocol = cpu_to_be16((payload[6] << 8) |
1814 payload[7]);
Helmut Schaaf75f5c62011-08-01 11:32:52 +02001815 }
1816
Johannes Berg3b8d81e02009-06-17 17:43:56 +02001817 memset(info, 0, sizeof(*info));
1818
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001819 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
Johannes Berg73b9f032011-10-07 14:01:26 +02001820 IEEE80211_TX_CTL_INJECTED;
1821
1822 /* process and remove the injection radiotap header */
1823 if (!ieee80211_parse_tx_radiotap(skb))
1824 goto fail;
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001825
1826 rcu_read_lock();
1827
1828 /*
1829 * We process outgoing injected frames that have a local address
1830 * we handle as though they are non-injected frames.
1831 * This code here isn't entirely correct, the local MAC address
1832 * isn't always enough to find the interface to use; for proper
1833 * VLAN/WDS support we will need a different mechanism (which
1834 * likely isn't going to be monitor interfaces).
1835 */
1836 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1837
1838 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
1839 if (!ieee80211_sdata_running(tmp_sdata))
1840 continue;
1841 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1842 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1843 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
1844 continue;
Joe Perchesb203ca32012-05-08 18:56:52 +00001845 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001846 sdata = tmp_sdata;
1847 break;
1848 }
1849 }
Johannes Berg7351c6b2009-11-19 01:08:30 +01001850
Johannes Berg55de9082012-07-26 17:24:39 +02001851 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1852 if (!chanctx_conf) {
1853 tmp_sdata = rcu_dereference(local->monitor_sdata);
1854 if (tmp_sdata)
1855 chanctx_conf =
1856 rcu_dereference(tmp_sdata->vif.chanctx_conf);
1857 }
Johannes Berg55de9082012-07-26 17:24:39 +02001858
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01001859 if (chanctx_conf)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001860 chandef = &chanctx_conf->def;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01001861 else if (!local->use_chanctx)
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001862 chandef = &local->_oper_chandef;
Felix Fietkaub4a7ff72013-01-13 23:10:26 +01001863 else
1864 goto fail_rcu;
Johannes Berg55de9082012-07-26 17:24:39 +02001865
1866 /*
1867 * Frame injection is not allowed if beaconing is not allowed
1868 * or if we need radar detection. Beaconing is usually not allowed when
1869 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1870 * Passive scan is also used in world regulatory domains where
1871 * your country is not known and as such it should be treated as
1872 * NO TX unless the channel is explicitly allowed in which case
1873 * your current regulatory domain would not have the passive scan
1874 * flag.
1875 *
1876 * Since AP mode uses monitor interfaces to inject/TX management
1877 * frames we can make AP mode the exception to this rule once it
1878 * supports radar detection as its implementation can deal with
1879 * radar detection by itself. We can do that later by adding a
1880 * monitor flag interfaces used for AP support.
1881 */
Janusz Dziedzicb4932832014-06-05 08:12:57 +02001882 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
1883 sdata->vif.type))
Johannes Berg55de9082012-07-26 17:24:39 +02001884 goto fail_rcu;
1885
Johannes Berg73c4e192014-11-09 18:50:09 +02001886 info->band = chandef->chan->band;
Johannes Berg7c107702015-03-20 14:18:27 +01001887 ieee80211_xmit(sdata, NULL, skb);
Johannes Berg5d9cf4a2011-10-07 14:01:23 +02001888 rcu_read_unlock();
1889
Johannes Berge2ebc742007-07-27 15:43:22 +02001890 return NETDEV_TX_OK;
Andy Green9b8a74e2007-07-27 15:43:24 +02001891
Johannes Berg55de9082012-07-26 17:24:39 +02001892fail_rcu:
1893 rcu_read_unlock();
Andy Green9b8a74e2007-07-27 15:43:24 +02001894fail:
1895 dev_kfree_skb(skb);
1896 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
Johannes Berge2ebc742007-07-27 15:43:22 +02001897}
1898
Johannes Berg97ffe752015-03-21 09:13:45 +01001899static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
Matti Gottliebad38bfc2013-11-18 19:06:45 +02001900{
Johannes Berg97ffe752015-03-21 09:13:45 +01001901 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
Matti Gottliebad38bfc2013-11-18 19:06:45 +02001902
Johannes Berg97ffe752015-03-21 09:13:45 +01001903 return ethertype == ETH_P_TDLS &&
1904 skb->len > 14 &&
1905 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
1906}
1907
1908static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
1909 struct sk_buff *skb,
1910 struct sta_info **sta_out)
1911{
1912 struct sta_info *sta;
1913
1914 switch (sdata->vif.type) {
1915 case NL80211_IFTYPE_AP_VLAN:
1916 sta = rcu_dereference(sdata->u.vlan.sta);
1917 if (sta) {
1918 *sta_out = sta;
1919 return 0;
1920 } else if (sdata->wdev.use_4addr) {
1921 return -ENOLINK;
1922 }
1923 /* fall through */
1924 case NL80211_IFTYPE_AP:
1925 case NL80211_IFTYPE_OCB:
1926 case NL80211_IFTYPE_ADHOC:
1927 if (is_multicast_ether_addr(skb->data)) {
1928 *sta_out = ERR_PTR(-ENOENT);
1929 return 0;
1930 }
1931 sta = sta_info_get_bss(sdata, skb->data);
1932 break;
1933 case NL80211_IFTYPE_WDS:
1934 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
1935 break;
1936#ifdef CONFIG_MAC80211_MESH
1937 case NL80211_IFTYPE_MESH_POINT:
1938 /* determined much later */
1939 *sta_out = NULL;
1940 return 0;
1941#endif
1942 case NL80211_IFTYPE_STATION:
1943 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1944 sta = sta_info_get(sdata, skb->data);
1945 if (sta) {
1946 bool tdls_peer, tdls_auth;
1947
1948 tdls_peer = test_sta_flag(sta,
1949 WLAN_STA_TDLS_PEER);
1950 tdls_auth = test_sta_flag(sta,
1951 WLAN_STA_TDLS_PEER_AUTH);
1952
1953 if (tdls_peer && tdls_auth) {
1954 *sta_out = sta;
1955 return 0;
1956 }
1957
1958 /*
1959 * TDLS link during setup - throw out frames to
1960 * peer. Allow TDLS-setup frames to unauthorized
1961 * peers for the special case of a link teardown
1962 * after a TDLS sta is removed due to being
1963 * unreachable.
1964 */
1965 if (tdls_peer && !tdls_auth &&
1966 !ieee80211_is_tdls_setup(skb))
1967 return -EINVAL;
1968 }
1969
1970 }
1971
1972 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
1973 if (!sta)
1974 return -ENOLINK;
1975 break;
1976 default:
1977 return -EINVAL;
1978 }
1979
1980 *sta_out = sta ?: ERR_PTR(-ENOENT);
1981 return 0;
Matti Gottliebad38bfc2013-11-18 19:06:45 +02001982}
1983
Johannes Berge2ebc742007-07-27 15:43:22 +02001984/**
Johannes Berg4c9451e2014-11-09 18:50:10 +02001985 * ieee80211_build_hdr - build 802.11 header in the given frame
1986 * @sdata: virtual interface to build the header for
1987 * @skb: the skb to build the header in
Liad Kaufman24d342c2014-11-09 18:50:07 +02001988 * @info_flags: skb flags to set
Johannes Berge2ebc742007-07-27 15:43:22 +02001989 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02001990 * This function takes the skb with 802.3 header and reformats the header to
1991 * the appropriate IEEE 802.11 header based on which interface the packet is
1992 * being transmitted on.
Johannes Berge2ebc742007-07-27 15:43:22 +02001993 *
Johannes Berg4c9451e2014-11-09 18:50:10 +02001994 * Note that this function also takes care of the TX status request and
1995 * potential unsharing of the SKB - this needs to be interleaved with the
1996 * header building.
1997 *
1998 * The function requires the read-side RCU lock held
1999 *
2000 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
Johannes Berge2ebc742007-07-27 15:43:22 +02002001 */
Johannes Berg4c9451e2014-11-09 18:50:10 +02002002static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
Johannes Berg7c107702015-03-20 14:18:27 +01002003 struct sk_buff *skb, u32 info_flags,
Johannes Berg97ffe752015-03-21 09:13:45 +01002004 struct sta_info *sta)
Johannes Berge2ebc742007-07-27 15:43:22 +02002005{
Johannes Berg133b8222008-09-16 14:18:59 +02002006 struct ieee80211_local *local = sdata->local;
Felix Fietkau489ee912010-12-18 19:30:48 +01002007 struct ieee80211_tx_info *info;
Johannes Bergdcf33962012-07-30 15:11:56 +02002008 int head_need;
Harvey Harrison065e96052008-06-22 16:45:27 -07002009 u16 ethertype, hdrlen, meshhdrlen = 0;
2010 __le16 fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002011 struct ieee80211_hdr hdr;
Wey-Yi Guyff67bb82010-08-21 07:23:29 -07002012 struct ieee80211s_hdr mesh_hdr __maybe_unused;
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002013 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
Johannes Berge2ebc742007-07-27 15:43:22 +02002014 const u8 *encaps_data;
2015 int encaps_len, skip_header_bytes;
Jiri Slabye8bf9642007-08-28 17:01:54 -04002016 int nh_pos, h_pos;
Johannes Berg97ffe752015-03-21 09:13:45 +01002017 bool wme_sta = false, authorized = false;
2018 bool tdls_peer;
Johannes Berga729cff2011-11-06 14:13:34 +01002019 bool multicast;
Johannes Berga729cff2011-11-06 14:13:34 +01002020 u16 info_id = 0;
Johannes Berg55de9082012-07-26 17:24:39 +02002021 struct ieee80211_chanctx_conf *chanctx_conf;
2022 struct ieee80211_sub_if_data *ap_sdata;
2023 enum ieee80211_band band;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002024 int ret;
Johannes Berge2ebc742007-07-27 15:43:22 +02002025
Johannes Berg97ffe752015-03-21 09:13:45 +01002026 if (IS_ERR(sta))
2027 sta = NULL;
2028
Johannes Berge2ebc742007-07-27 15:43:22 +02002029 /* convert Ethernet header to proper 802.11 header (based on
2030 * operation mode) */
2031 ethertype = (skb->data[12] << 8) | skb->data[13];
Harvey Harrison065e96052008-06-22 16:45:27 -07002032 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
Johannes Berge2ebc742007-07-27 15:43:22 +02002033
Johannes Berg51fb61e2007-12-19 01:31:27 +01002034 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +02002035 case NL80211_IFTYPE_AP_VLAN:
Johannes Berg97ffe752015-03-21 09:13:45 +01002036 if (sdata->wdev.use_4addr) {
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002037 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2038 /* RA TA DA SA */
2039 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002040 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002041 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2042 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2043 hdrlen = 30;
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002044 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
Johannes Berga74a8c82014-07-22 14:50:47 +02002045 wme_sta = sta->sta.wme;
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002046 }
Johannes Berg55de9082012-07-26 17:24:39 +02002047 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2048 u.ap);
2049 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002050 if (!chanctx_conf) {
2051 ret = -ENOTCONN;
2052 goto free;
2053 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002054 band = chanctx_conf->def.chan->band;
Johannes Berg97ffe752015-03-21 09:13:45 +01002055 if (sdata->wdev.use_4addr)
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002056 break;
2057 /* fall through */
2058 case NL80211_IFTYPE_AP:
Arnd Bergmannfe801232013-01-25 14:14:33 +00002059 if (sdata->vif.type == NL80211_IFTYPE_AP)
2060 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002061 if (!chanctx_conf) {
2062 ret = -ENOTCONN;
2063 goto free;
2064 }
Harvey Harrison065e96052008-06-22 16:45:27 -07002065 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002066 /* DA BSSID SA */
2067 memcpy(hdr.addr1, skb->data, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002068 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002069 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2070 hdrlen = 24;
Johannes Berg4bf88532012-11-09 11:39:59 +01002071 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002072 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002073 case NL80211_IFTYPE_WDS:
Harvey Harrison065e96052008-06-22 16:45:27 -07002074 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
Johannes Berge2ebc742007-07-27 15:43:22 +02002075 /* RA TA DA SA */
2076 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002077 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002078 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2079 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2080 hdrlen = 30;
Johannes Berg55de9082012-07-26 17:24:39 +02002081 /*
2082 * This is the exception! WDS style interfaces are prohibited
2083 * when channel contexts are in used so this must be valid
2084 */
Karl Beldan675a0b02013-03-25 16:26:57 +01002085 band = local->hw.conf.chandef.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002086 break;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002087#ifdef CONFIG_MAC80211_MESH
Johannes Berg05c914f2008-09-11 00:01:58 +02002088 case NL80211_IFTYPE_MESH_POINT:
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002089 if (!is_multicast_ether_addr(skb->data)) {
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002090 struct sta_info *next_hop;
2091 bool mpp_lookup = true;
2092
Johannes Bergbf7cd942013-02-15 14:40:31 +01002093 mpath = mesh_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002094 if (mpath) {
2095 mpp_lookup = false;
2096 next_hop = rcu_dereference(mpath->next_hop);
2097 if (!next_hop ||
2098 !(mpath->flags & (MESH_PATH_ACTIVE |
2099 MESH_PATH_RESOLVING)))
2100 mpp_lookup = true;
2101 }
2102
2103 if (mpp_lookup)
Johannes Bergbf7cd942013-02-15 14:40:31 +01002104 mppath = mpp_path_lookup(sdata, skb->data);
Chun-Yeow Yeoh163df6c2013-02-19 10:04:50 +08002105
2106 if (mppath && mpath)
2107 mesh_path_del(mpath->sdata, mpath->dst);
Chun-Yeow Yeohb8bacc12012-05-30 09:30:41 +08002108 }
YanBo79617de2008-09-22 13:30:32 +08002109
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002110 /*
Joel A Fernandes9d525012011-01-10 00:44:23 -06002111 * Use address extension if it is a packet from
2112 * another interface or if we know the destination
2113 * is being proxied by a portal (i.e. portal address
2114 * differs from proxied address)
Joel A Fernandesf76b57b2010-12-28 19:28:11 -06002115 */
Joe Perchesb203ca32012-05-08 18:56:52 +00002116 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2117 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
Javier Cardona3c5772a2009-08-10 12:15:48 -07002118 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2119 skb->data, skb->data + ETH_ALEN);
Johannes Bergbf7cd942013-02-15 14:40:31 +01002120 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2121 NULL, NULL);
YanBo79617de2008-09-22 13:30:32 +08002122 } else {
Thomas Pedersen27f01122012-08-20 11:28:25 -07002123 /* DS -> MBSS (802.11-2012 13.11.3.3).
2124 * For unicast with unknown forwarding information,
2125 * destination might be in the MBSS or if that fails
2126 * forwarded to another mesh gate. In either case
2127 * resolution will be handled in ieee80211_xmit(), so
2128 * leave the original DA. This also works for mcast */
2129 const u8 *mesh_da = skb->data;
YanBo79617de2008-09-22 13:30:32 +08002130
Thomas Pedersen27f01122012-08-20 11:28:25 -07002131 if (mppath)
2132 mesh_da = mppath->mpp;
2133 else if (mpath)
2134 mesh_da = mpath->dst;
Thomas Pedersen27f01122012-08-20 11:28:25 -07002135
Javier Cardona3c5772a2009-08-10 12:15:48 -07002136 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
Johannes Berg47846c92009-11-25 17:46:19 +01002137 mesh_da, sdata->vif.addr);
Thomas Pedersen27f01122012-08-20 11:28:25 -07002138 if (is_multicast_ether_addr(mesh_da))
2139 /* DA TA mSA AE:SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002140 meshhdrlen = ieee80211_new_mesh_header(
2141 sdata, &mesh_hdr,
2142 skb->data + ETH_ALEN, NULL);
Javier Cardona3c5772a2009-08-10 12:15:48 -07002143 else
Thomas Pedersen27f01122012-08-20 11:28:25 -07002144 /* RA TA mDA mSA AE:DA SA */
Johannes Bergbf7cd942013-02-15 14:40:31 +01002145 meshhdrlen = ieee80211_new_mesh_header(
2146 sdata, &mesh_hdr, skb->data,
2147 skb->data + ETH_ALEN);
YanBo79617de2008-09-22 13:30:32 +08002148
YanBo79617de2008-09-22 13:30:32 +08002149 }
Johannes Berg55de9082012-07-26 17:24:39 +02002150 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002151 if (!chanctx_conf) {
2152 ret = -ENOTCONN;
2153 goto free;
2154 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002155 band = chanctx_conf->def.chan->band;
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002156 break;
2157#endif
Johannes Berg05c914f2008-09-11 00:01:58 +02002158 case NL80211_IFTYPE_STATION:
Johannes Berg97ffe752015-03-21 09:13:45 +01002159 /* we already did checks when looking up the RA STA */
2160 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002161
Johannes Berg97ffe752015-03-21 09:13:45 +01002162 if (tdls_peer) {
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002163 /* DA SA BSSID */
2164 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2165 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2166 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2167 hdrlen = 24;
2168 } else if (sdata->u.mgd.use_4addr &&
2169 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2170 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2171 IEEE80211_FCTL_TODS);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002172 /* RA TA DA SA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002173 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +01002174 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002175 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2176 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2177 hdrlen = 30;
2178 } else {
2179 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2180 /* BSSID SA DA */
Arik Nemtsov941c93c2011-09-28 14:12:54 +03002181 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
Felix Fietkauf14543ee2009-11-10 20:10:05 +01002182 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2183 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2184 hdrlen = 24;
2185 }
Johannes Berg55de9082012-07-26 17:24:39 +02002186 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002187 if (!chanctx_conf) {
2188 ret = -ENOTCONN;
2189 goto free;
2190 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002191 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002192 break;
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002193 case NL80211_IFTYPE_OCB:
2194 /* DA SA BSSID */
2195 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2196 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2197 eth_broadcast_addr(hdr.addr3);
2198 hdrlen = 24;
2199 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002200 if (!chanctx_conf) {
2201 ret = -ENOTCONN;
2202 goto free;
2203 }
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002204 band = chanctx_conf->def.chan->band;
2205 break;
Johannes Berg05c914f2008-09-11 00:01:58 +02002206 case NL80211_IFTYPE_ADHOC:
Johannes Berge2ebc742007-07-27 15:43:22 +02002207 /* DA SA BSSID */
2208 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2209 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01002210 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berge2ebc742007-07-27 15:43:22 +02002211 hdrlen = 24;
Johannes Berg55de9082012-07-26 17:24:39 +02002212 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002213 if (!chanctx_conf) {
2214 ret = -ENOTCONN;
2215 goto free;
2216 }
Johannes Berg4bf88532012-11-09 11:39:59 +01002217 band = chanctx_conf->def.chan->band;
Johannes Bergcf966832007-08-28 17:01:54 -04002218 break;
2219 default:
Johannes Berg4c9451e2014-11-09 18:50:10 +02002220 ret = -EINVAL;
2221 goto free;
Johannes Berge2ebc742007-07-27 15:43:22 +02002222 }
2223
Johannes Berga729cff2011-11-06 14:13:34 +01002224 multicast = is_multicast_ether_addr(hdr.addr1);
Johannes Berge2ebc742007-07-27 15:43:22 +02002225
Johannes Berg97ffe752015-03-21 09:13:45 +01002226 /* sta is always NULL for mesh */
2227 if (sta) {
2228 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2229 wme_sta = sta->sta.wme;
2230 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2231 /* For mesh, the use of the QoS header is mandatory */
Johannes Bergc2c98fd2011-09-29 16:04:36 +02002232 wme_sta = true;
Johannes Berge2ebc742007-07-27 15:43:22 +02002233 }
2234
Johannes Berg527871d2015-03-21 08:09:55 +01002235 /* receiver does QoS (which also means we do) use it */
2236 if (wme_sta) {
Harvey Harrison065e96052008-06-22 16:45:27 -07002237 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002238 hdrlen += 2;
2239 }
2240
2241 /*
Johannes Berg238814f2008-01-28 17:19:37 +01002242 * Drop unicast frames to unauthorised stations unless they are
2243 * EAPOL frames from the local station.
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002244 */
Johannes Berg55182e42011-10-12 17:28:21 +02002245 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
Rostislav Lisovy239281f2014-11-03 10:33:19 +01002246 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
Sergey Ryazanova6ececf2013-08-30 01:35:09 +04002247 !multicast && !authorized &&
Johannes Berg55182e42011-10-12 17:28:21 +02002248 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
Joe Perchesb203ca32012-05-08 18:56:52 +00002249 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002250#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
Johannes Bergbdcbd8e2012-06-22 11:29:50 +02002251 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
Johannes Berg4c9451e2014-11-09 18:50:10 +02002252 sdata->name, hdr.addr1);
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002253#endif
2254
2255 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2256
Johannes Berg4c9451e2014-11-09 18:50:10 +02002257 ret = -EPERM;
2258 goto free;
Johannes Bergce3edf6d02007-12-19 01:31:22 +01002259 }
2260
Johannes Berga729cff2011-11-06 14:13:34 +01002261 if (unlikely(!multicast && skb->sk &&
2262 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002263 struct sk_buff *ack_skb = skb_clone_sk(skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002264
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002265 if (ack_skb) {
Johannes Berga729cff2011-11-06 14:13:34 +01002266 unsigned long flags;
Tejun Heo9475af62013-02-27 17:04:59 -08002267 int id;
Johannes Berga729cff2011-11-06 14:13:34 +01002268
2269 spin_lock_irqsave(&local->ack_status_lock, flags);
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002270 id = idr_alloc(&local->ack_status_frames, ack_skb,
Tejun Heo9475af62013-02-27 17:04:59 -08002271 1, 0x10000, GFP_ATOMIC);
Johannes Berga729cff2011-11-06 14:13:34 +01002272 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2273
Tejun Heo9475af62013-02-27 17:04:59 -08002274 if (id >= 0) {
Johannes Berga729cff2011-11-06 14:13:34 +01002275 info_id = id;
2276 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
Johannes Berga729cff2011-11-06 14:13:34 +01002277 } else {
Alexander Duyckbf7fa552014-09-10 18:05:42 -04002278 kfree_skb(ack_skb);
Johannes Berga729cff2011-11-06 14:13:34 +01002279 }
Johannes Berga729cff2011-11-06 14:13:34 +01002280 }
2281 }
2282
Helmut Schaa7e244702010-12-02 18:44:09 +01002283 /*
2284 * If the skb is shared we need to obtain our own copy.
2285 */
2286 if (skb_shared(skb)) {
Johannes Berga729cff2011-11-06 14:13:34 +01002287 struct sk_buff *tmp_skb = skb;
2288
2289 /* can't happen -- skb is a clone if info_id != 0 */
2290 WARN_ON(info_id);
2291
Felix Fietkauf8a0a782010-12-18 19:30:50 +01002292 skb = skb_clone(skb, GFP_ATOMIC);
Helmut Schaa7e244702010-12-02 18:44:09 +01002293 kfree_skb(tmp_skb);
2294
Johannes Berg4c9451e2014-11-09 18:50:10 +02002295 if (!skb) {
2296 ret = -ENOMEM;
2297 goto free;
2298 }
Helmut Schaa7e244702010-12-02 18:44:09 +01002299 }
2300
Harvey Harrison065e96052008-06-22 16:45:27 -07002301 hdr.frame_control = fc;
Johannes Berge2ebc742007-07-27 15:43:22 +02002302 hdr.duration_id = 0;
2303 hdr.seq_ctrl = 0;
2304
2305 skip_header_bytes = ETH_HLEN;
2306 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2307 encaps_data = bridge_tunnel_header;
2308 encaps_len = sizeof(bridge_tunnel_header);
2309 skip_header_bytes -= 2;
Simon Hormane5c5d222013-03-28 13:38:25 +09002310 } else if (ethertype >= ETH_P_802_3_MIN) {
Johannes Berge2ebc742007-07-27 15:43:22 +02002311 encaps_data = rfc1042_header;
2312 encaps_len = sizeof(rfc1042_header);
2313 skip_header_bytes -= 2;
2314 } else {
2315 encaps_data = NULL;
2316 encaps_len = 0;
2317 }
2318
Helmut Schaa7e244702010-12-02 18:44:09 +01002319 nh_pos = skb_network_header(skb) - skb->data;
2320 h_pos = skb_transport_header(skb) - skb->data;
2321
Johannes Berge2ebc742007-07-27 15:43:22 +02002322 skb_pull(skb, skip_header_bytes);
2323 nh_pos -= skip_header_bytes;
2324 h_pos -= skip_header_bytes;
2325
Johannes Berg23c07522008-05-29 10:38:53 +02002326 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02002327
Johannes Berg23c07522008-05-29 10:38:53 +02002328 /*
2329 * So we need to modify the skb header and hence need a copy of
2330 * that. The head_need variable above doesn't, so far, include
2331 * the needed header space that we don't need right away. If we
2332 * can, then we don't reallocate right now but only after the
2333 * frame arrives at the master device (if it does...)
2334 *
2335 * If we cannot, however, then we will reallocate to include all
2336 * the ever needed space. Also, if we need to reallocate it anyway,
2337 * make it big enough for everything we may ever need.
2338 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002339
David S. Miller3a5be7d2008-06-18 01:19:51 -07002340 if (head_need > 0 || skb_cloned(skb)) {
Max Stepanov2475b1cc2013-03-24 14:23:27 +02002341 head_need += sdata->encrypt_headroom;
Johannes Berg23c07522008-05-29 10:38:53 +02002342 head_need += local->tx_headroom;
2343 head_need = max_t(int, 0, head_need);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002344 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2345 ieee80211_free_txskb(&local->hw, skb);
Johannes Berg1c963be2012-11-07 14:02:30 +01002346 skb = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002347 return ERR_PTR(-ENOMEM);
Felix Fietkauc3e77242012-10-08 14:39:33 +02002348 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002349 }
2350
2351 if (encaps_data) {
2352 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2353 nh_pos += encaps_len;
2354 h_pos += encaps_len;
2355 }
Johannes Bergc29b9b92007-09-14 11:10:24 -04002356
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002357#ifdef CONFIG_MAC80211_MESH
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002358 if (meshhdrlen > 0) {
2359 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2360 nh_pos += meshhdrlen;
2361 h_pos += meshhdrlen;
2362 }
Yuri Ershove4ab7eb2010-06-29 15:08:06 +04002363#endif
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01002364
Harvey Harrison065e96052008-06-22 16:45:27 -07002365 if (ieee80211_is_data_qos(fc)) {
Johannes Bergc29b9b92007-09-14 11:10:24 -04002366 __le16 *qos_control;
2367
Weilong Chenf359d3f2013-12-18 15:44:16 +08002368 qos_control = (__le16 *) skb_push(skb, 2);
Johannes Bergc29b9b92007-09-14 11:10:24 -04002369 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2370 /*
2371 * Maybe we could actually set some fields here, for now just
2372 * initialise to zero to indicate no special operation.
2373 */
2374 *qos_control = 0;
2375 } else
2376 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2377
Johannes Berge2ebc742007-07-27 15:43:22 +02002378 nh_pos += hdrlen;
2379 h_pos += hdrlen;
2380
Johannes Berge2ebc742007-07-27 15:43:22 +02002381 /* Update skb pointers to various headers since this modified frame
2382 * is going to go through Linux networking code that may potentially
2383 * need things like pointer to IP header. */
2384 skb_set_mac_header(skb, 0);
2385 skb_set_network_header(skb, nh_pos);
2386 skb_set_transport_header(skb, h_pos);
2387
Felix Fietkau489ee912010-12-18 19:30:48 +01002388 info = IEEE80211_SKB_CB(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02002389 memset(info, 0, sizeof(*info));
2390
Johannes Berga729cff2011-11-06 14:13:34 +01002391 info->flags = info_flags;
2392 info->ack_frame_id = info_id;
Johannes Berg73c4e192014-11-09 18:50:09 +02002393 info->band = band;
Johannes Berga729cff2011-11-06 14:13:34 +01002394
Johannes Berg4c9451e2014-11-09 18:50:10 +02002395 return skb;
2396 free:
2397 kfree_skb(skb);
2398 return ERR_PTR(ret);
Johannes Berge2ebc742007-07-27 15:43:22 +02002399}
2400
Johannes Berg17c18bf2015-03-21 15:25:43 +01002401/*
2402 * fast-xmit overview
2403 *
2404 * The core idea of this fast-xmit is to remove per-packet checks by checking
2405 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2406 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2407 * much less work can be done per packet. For example, fragmentation must be
2408 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2409 * in the code here.
2410 *
2411 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2412 * header and other data to aid packet processing in ieee80211_xmit_fast().
2413 *
2414 * The most difficult part of this is that when any of these assumptions
2415 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2416 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2417 * since the per-packet code no longer checks the conditions. This is reflected
2418 * by the calls to these functions throughout the rest of the code, and must be
2419 * maintained if any of the TX path checks change.
2420 */
2421
2422void ieee80211_check_fast_xmit(struct sta_info *sta)
2423{
2424 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2425 struct ieee80211_local *local = sta->local;
2426 struct ieee80211_sub_if_data *sdata = sta->sdata;
2427 struct ieee80211_hdr *hdr = (void *)build.hdr;
2428 struct ieee80211_chanctx_conf *chanctx_conf;
2429 __le16 fc;
2430
Johannes Berg30686bf2015-06-02 21:39:54 +02002431 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
Johannes Berg17c18bf2015-03-21 15:25:43 +01002432 return;
2433
2434 /* Locking here protects both the pointer itself, and against concurrent
2435 * invocations winning data access races to, e.g., the key pointer that
2436 * is used.
2437 * Without it, the invocation of this function right after the key
2438 * pointer changes wouldn't be sufficient, as another CPU could access
2439 * the pointer, then stall, and then do the cache update after the CPU
2440 * that invalidated the key.
2441 * With the locking, such scenarios cannot happen as the check for the
2442 * key and the fast-tx assignment are done atomically, so the CPU that
2443 * modifies the key will either wait or other one will see the key
2444 * cleared/changed already.
2445 */
2446 spin_lock_bh(&sta->lock);
Johannes Berg30686bf2015-06-02 21:39:54 +02002447 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2448 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
Johannes Berg17c18bf2015-03-21 15:25:43 +01002449 sdata->vif.type == NL80211_IFTYPE_STATION)
2450 goto out;
2451
2452 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2453 goto out;
2454
2455 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2456 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
2457 test_sta_flag(sta, WLAN_STA_PS_DELIVER))
2458 goto out;
2459
2460 if (sdata->noack_map)
2461 goto out;
2462
2463 /* fast-xmit doesn't handle fragmentation at all */
Johannes Berg725b8122015-04-10 14:02:08 +02002464 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
2465 !local->ops->set_frag_threshold)
Johannes Berg17c18bf2015-03-21 15:25:43 +01002466 goto out;
2467
2468 rcu_read_lock();
2469 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2470 if (!chanctx_conf) {
2471 rcu_read_unlock();
2472 goto out;
2473 }
2474 build.band = chanctx_conf->def.chan->band;
2475 rcu_read_unlock();
2476
2477 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2478
2479 switch (sdata->vif.type) {
Johannes Berg3ffd8842015-04-14 10:28:37 +02002480 case NL80211_IFTYPE_ADHOC:
2481 /* DA SA BSSID */
2482 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2483 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2484 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2485 build.hdr_len = 24;
2486 break;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002487 case NL80211_IFTYPE_STATION:
2488 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2489 /* DA SA BSSID */
2490 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2491 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2492 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2493 build.hdr_len = 24;
2494 break;
2495 }
2496
2497 if (sdata->u.mgd.use_4addr) {
2498 /* non-regular ethertype cannot use the fastpath */
2499 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2500 IEEE80211_FCTL_TODS);
2501 /* RA TA DA SA */
2502 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2503 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2504 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2505 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2506 build.hdr_len = 30;
2507 break;
2508 }
2509 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2510 /* BSSID SA DA */
2511 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2512 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2513 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2514 build.hdr_len = 24;
2515 break;
2516 case NL80211_IFTYPE_AP_VLAN:
2517 if (sdata->wdev.use_4addr) {
2518 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2519 IEEE80211_FCTL_TODS);
2520 /* RA TA DA SA */
2521 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2522 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2523 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2524 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2525 build.hdr_len = 30;
2526 break;
2527 }
2528 /* fall through */
2529 case NL80211_IFTYPE_AP:
2530 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2531 /* DA BSSID SA */
2532 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2533 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2534 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2535 build.hdr_len = 24;
2536 break;
2537 default:
2538 /* not handled on fast-xmit */
2539 goto out;
2540 }
2541
2542 if (sta->sta.wme) {
2543 build.hdr_len += 2;
2544 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2545 }
2546
2547 /* We store the key here so there's no point in using rcu_dereference()
2548 * but that's fine because the code that changes the pointers will call
2549 * this function after doing so. For a single CPU that would be enough,
2550 * for multiple see the comment above.
2551 */
2552 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2553 if (!build.key)
2554 build.key = rcu_access_pointer(sdata->default_unicast_key);
2555 if (build.key) {
Johannes Berge495c242015-04-10 14:03:17 +02002556 bool gen_iv, iv_spc, mmic;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002557
2558 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2559 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
Johannes Berge495c242015-04-10 14:03:17 +02002560 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002561
2562 /* don't handle software crypto */
2563 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2564 goto out;
2565
2566 switch (build.key->conf.cipher) {
2567 case WLAN_CIPHER_SUITE_CCMP:
2568 case WLAN_CIPHER_SUITE_CCMP_256:
2569 /* add fixed key ID */
2570 if (gen_iv) {
2571 (build.hdr + build.hdr_len)[3] =
2572 0x20 | (build.key->conf.keyidx << 6);
2573 build.pn_offs = build.hdr_len;
2574 }
2575 if (gen_iv || iv_spc)
2576 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2577 break;
2578 case WLAN_CIPHER_SUITE_GCMP:
2579 case WLAN_CIPHER_SUITE_GCMP_256:
2580 /* add fixed key ID */
2581 if (gen_iv) {
2582 (build.hdr + build.hdr_len)[3] =
2583 0x20 | (build.key->conf.keyidx << 6);
2584 build.pn_offs = build.hdr_len;
2585 }
2586 if (gen_iv || iv_spc)
2587 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2588 break;
Johannes Berge495c242015-04-10 14:03:17 +02002589 case WLAN_CIPHER_SUITE_TKIP:
2590 /* cannot handle MMIC or IV generation in xmit-fast */
2591 if (mmic || gen_iv)
2592 goto out;
2593 if (iv_spc)
2594 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2595 break;
2596 case WLAN_CIPHER_SUITE_WEP40:
2597 case WLAN_CIPHER_SUITE_WEP104:
2598 /* cannot handle IV generation in fast-xmit */
2599 if (gen_iv)
2600 goto out;
2601 if (iv_spc)
2602 build.hdr_len += IEEE80211_WEP_IV_LEN;
2603 break;
2604 case WLAN_CIPHER_SUITE_AES_CMAC:
2605 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2606 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2607 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2608 WARN(1,
2609 "management cipher suite 0x%x enabled for data\n",
2610 build.key->conf.cipher);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002611 goto out;
Johannes Berge495c242015-04-10 14:03:17 +02002612 default:
2613 /* we don't know how to generate IVs for this at all */
2614 if (WARN_ON(gen_iv))
2615 goto out;
2616 /* pure hardware keys are OK, of course */
2617 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2618 break;
2619 /* cipher scheme might require space allocation */
2620 if (iv_spc &&
2621 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2622 goto out;
2623 if (iv_spc)
2624 build.hdr_len += build.key->conf.iv_len;
Johannes Berg17c18bf2015-03-21 15:25:43 +01002625 }
2626
2627 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2628 }
2629
2630 hdr->frame_control = fc;
2631
2632 memcpy(build.hdr + build.hdr_len,
2633 rfc1042_header, sizeof(rfc1042_header));
2634 build.hdr_len += sizeof(rfc1042_header);
2635
2636 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2637 /* if the kmemdup fails, continue w/o fast_tx */
2638 if (!fast_tx)
2639 goto out;
2640
2641 out:
2642 /* we might have raced against another call to this function */
2643 old = rcu_dereference_protected(sta->fast_tx,
2644 lockdep_is_held(&sta->lock));
2645 rcu_assign_pointer(sta->fast_tx, fast_tx);
2646 if (old)
2647 kfree_rcu(old, rcu_head);
2648 spin_unlock_bh(&sta->lock);
2649}
2650
2651void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2652{
2653 struct sta_info *sta;
2654
2655 rcu_read_lock();
2656 list_for_each_entry_rcu(sta, &local->sta_list, list)
2657 ieee80211_check_fast_xmit(sta);
2658 rcu_read_unlock();
2659}
2660
2661void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
2662{
2663 struct ieee80211_local *local = sdata->local;
2664 struct sta_info *sta;
2665
2666 rcu_read_lock();
2667
2668 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2669 if (sdata != sta->sdata &&
2670 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
2671 continue;
2672 ieee80211_check_fast_xmit(sta);
2673 }
2674
2675 rcu_read_unlock();
2676}
2677
2678void ieee80211_clear_fast_xmit(struct sta_info *sta)
2679{
2680 struct ieee80211_fast_tx *fast_tx;
2681
2682 spin_lock_bh(&sta->lock);
2683 fast_tx = rcu_dereference_protected(sta->fast_tx,
2684 lockdep_is_held(&sta->lock));
2685 RCU_INIT_POINTER(sta->fast_tx, NULL);
2686 spin_unlock_bh(&sta->lock);
2687
2688 if (fast_tx)
2689 kfree_rcu(fast_tx, rcu_head);
2690}
2691
2692static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
2693 struct net_device *dev, struct sta_info *sta,
2694 struct ieee80211_fast_tx *fast_tx,
2695 struct sk_buff *skb)
2696{
2697 struct ieee80211_local *local = sdata->local;
2698 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2699 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
2700 int hw_headroom = sdata->local->hw.extra_tx_headroom;
2701 struct ethhdr eth;
2702 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2703 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
2704 struct ieee80211_tx_data tx;
2705 ieee80211_tx_result r;
2706 struct tid_ampdu_tx *tid_tx = NULL;
2707 u8 tid = IEEE80211_NUM_TIDS;
2708
2709 /* control port protocol needs a lot of special handling */
2710 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
2711 return false;
2712
2713 /* only RFC 1042 SNAP */
2714 if (ethertype < ETH_P_802_3_MIN)
2715 return false;
2716
2717 /* don't handle TX status request here either */
2718 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
2719 return false;
2720
2721 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
2722 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
2723 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
Johannes Berg472be002015-06-09 16:45:08 +02002724 if (tid_tx) {
2725 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
2726 return false;
2727 if (tid_tx->timeout)
2728 tid_tx->last_tx = jiffies;
2729 }
Johannes Berg17c18bf2015-03-21 15:25:43 +01002730 }
2731
2732 /* after this point (skb is modified) we cannot return false */
2733
2734 if (skb_shared(skb)) {
2735 struct sk_buff *tmp_skb = skb;
2736
2737 skb = skb_clone(skb, GFP_ATOMIC);
2738 kfree_skb(tmp_skb);
2739
2740 if (!skb)
2741 return true;
2742 }
2743
Johannes Berg5a490512015-04-22 17:10:38 +02002744 ieee80211_tx_stats(dev, skb->len + extra_head);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002745
2746 /* will not be crypto-handled beyond what we do here, so use false
2747 * as the may-encrypt argument for the resize to not account for
2748 * more room than we already have in 'extra_head'
2749 */
2750 if (unlikely(ieee80211_skb_resize(sdata, skb,
2751 max_t(int, extra_head + hw_headroom -
2752 skb_headroom(skb), 0),
2753 false))) {
2754 kfree_skb(skb);
2755 return true;
2756 }
2757
2758 memcpy(&eth, skb->data, ETH_HLEN - 2);
2759 hdr = (void *)skb_push(skb, extra_head);
2760 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
2761 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
2762 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
2763
2764 memset(info, 0, sizeof(*info));
2765 info->band = fast_tx->band;
2766 info->control.vif = &sdata->vif;
2767 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
2768 IEEE80211_TX_CTL_DONTFRAG |
2769 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
2770
2771 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
2772 *ieee80211_get_qos_ctl(hdr) = tid;
2773 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
2774 } else {
2775 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
2776 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
2777 sdata->sequence_number += 0x10;
2778 }
2779
2780 sta->tx_msdu[tid]++;
2781
2782 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
2783
2784 __skb_queue_head_init(&tx.skbs);
2785
2786 tx.flags = IEEE80211_TX_UNICAST;
2787 tx.local = local;
2788 tx.sdata = sdata;
2789 tx.sta = sta;
2790 tx.key = fast_tx->key;
2791
2792 if (fast_tx->key)
2793 info->control.hw_key = &fast_tx->key->conf;
2794
Johannes Berg30686bf2015-06-02 21:39:54 +02002795 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
Johannes Berg17c18bf2015-03-21 15:25:43 +01002796 tx.skb = skb;
2797 r = ieee80211_tx_h_rate_ctrl(&tx);
2798 skb = tx.skb;
2799 tx.skb = NULL;
2800
2801 if (r != TX_CONTINUE) {
2802 if (r != TX_QUEUED)
2803 kfree_skb(skb);
2804 return true;
2805 }
2806 }
2807
2808 /* statistics normally done by ieee80211_tx_h_stats (but that
2809 * has to consider fragmentation, so is more complex)
2810 */
Johannes Berg17c18bf2015-03-21 15:25:43 +01002811 sta->tx_bytes[skb_get_queue_mapping(skb)] += skb->len;
2812 sta->tx_packets[skb_get_queue_mapping(skb)]++;
2813
2814 if (fast_tx->pn_offs) {
2815 u64 pn;
2816 u8 *crypto_hdr = skb->data + fast_tx->pn_offs;
2817
2818 switch (fast_tx->key->conf.cipher) {
2819 case WLAN_CIPHER_SUITE_CCMP:
2820 case WLAN_CIPHER_SUITE_CCMP_256:
Johannes Berg17c18bf2015-03-21 15:25:43 +01002821 case WLAN_CIPHER_SUITE_GCMP:
2822 case WLAN_CIPHER_SUITE_GCMP_256:
Johannes Bergdb388a52015-06-01 15:36:51 +02002823 pn = atomic64_inc_return(&fast_tx->key->conf.tx_pn);
Johannes Berg17c18bf2015-03-21 15:25:43 +01002824 crypto_hdr[0] = pn;
2825 crypto_hdr[1] = pn >> 8;
2826 crypto_hdr[4] = pn >> 16;
2827 crypto_hdr[5] = pn >> 24;
2828 crypto_hdr[6] = pn >> 32;
2829 crypto_hdr[7] = pn >> 40;
2830 break;
2831 }
2832 }
2833
2834 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2835 sdata = container_of(sdata->bss,
2836 struct ieee80211_sub_if_data, u.ap);
2837
2838 __skb_queue_tail(&tx.skbs, skb);
2839 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
2840 return true;
2841}
2842
Johannes Berg4c9451e2014-11-09 18:50:10 +02002843void __ieee80211_subif_start_xmit(struct sk_buff *skb,
2844 struct net_device *dev,
2845 u32 info_flags)
2846{
2847 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
Johannes Berg97ffe752015-03-21 09:13:45 +01002848 struct sta_info *sta;
Johannes Berg80616c02015-04-14 14:50:41 +02002849 struct sk_buff *next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002850
2851 if (unlikely(skb->len < ETH_HLEN)) {
2852 kfree_skb(skb);
2853 return;
2854 }
2855
2856 rcu_read_lock();
2857
Johannes Berg2d981fd2015-04-10 14:10:10 +02002858 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
2859 goto out_free;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002860
Johannes Berg17c18bf2015-03-21 15:25:43 +01002861 if (!IS_ERR_OR_NULL(sta)) {
2862 struct ieee80211_fast_tx *fast_tx;
2863
2864 fast_tx = rcu_dereference(sta->fast_tx);
2865
2866 if (fast_tx &&
2867 ieee80211_xmit_fast(sdata, dev, sta, fast_tx, skb))
2868 goto out;
2869 }
2870
Johannes Berg80616c02015-04-14 14:50:41 +02002871 if (skb_is_gso(skb)) {
2872 struct sk_buff *segs;
Johannes Berg680a0da2015-04-13 16:58:25 +02002873
Johannes Berg80616c02015-04-14 14:50:41 +02002874 segs = skb_gso_segment(skb, 0);
2875 if (IS_ERR(segs)) {
Johannes Berg2d981fd2015-04-10 14:10:10 +02002876 goto out_free;
Johannes Berg80616c02015-04-14 14:50:41 +02002877 } else if (segs) {
2878 consume_skb(skb);
2879 skb = segs;
2880 }
2881 } else {
2882 /* we cannot process non-linear frames on this path */
2883 if (skb_linearize(skb)) {
2884 kfree_skb(skb);
2885 goto out;
2886 }
2887
2888 /* the frame could be fragmented, software-encrypted, and other
2889 * things so we cannot really handle checksum offload with it -
2890 * fix it up in software before we handle anything else.
2891 */
2892 if (skb->ip_summed == CHECKSUM_PARTIAL) {
Johannes Bergf603f1f2015-05-05 15:25:33 +02002893 skb_set_transport_header(skb,
2894 skb_checksum_start_offset(skb));
Johannes Berg80616c02015-04-14 14:50:41 +02002895 if (skb_checksum_help(skb))
2896 goto out_free;
2897 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02002898 }
2899
Johannes Berg80616c02015-04-14 14:50:41 +02002900 next = skb;
2901 while (next) {
2902 skb = next;
2903 next = skb->next;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002904
Johannes Berg80616c02015-04-14 14:50:41 +02002905 skb->prev = NULL;
2906 skb->next = NULL;
Johannes Berg4c9451e2014-11-09 18:50:10 +02002907
Johannes Berg80616c02015-04-14 14:50:41 +02002908 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
2909 if (IS_ERR(skb))
2910 goto out;
2911
Johannes Berg5a490512015-04-22 17:10:38 +02002912 ieee80211_tx_stats(dev, skb->len);
Johannes Berg80616c02015-04-14 14:50:41 +02002913
2914 ieee80211_xmit(sdata, sta, skb);
2915 }
Johannes Berg2d981fd2015-04-10 14:10:10 +02002916 goto out;
2917 out_free:
2918 kfree_skb(skb);
Johannes Berg4c9451e2014-11-09 18:50:10 +02002919 out:
2920 rcu_read_unlock();
2921}
2922
2923/**
2924 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
2925 * @skb: packet to be sent
2926 * @dev: incoming interface
2927 *
2928 * On failure skb will be freed.
2929 */
Liad Kaufman24d342c2014-11-09 18:50:07 +02002930netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
2931 struct net_device *dev)
2932{
2933 __ieee80211_subif_start_xmit(skb, dev, 0);
2934 return NETDEV_TX_OK;
2935}
Johannes Berge2ebc742007-07-27 15:43:22 +02002936
Johannes Berg7528ec52014-11-09 18:50:11 +02002937struct sk_buff *
2938ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
2939 struct sk_buff *skb, u32 info_flags)
2940{
2941 struct ieee80211_hdr *hdr;
2942 struct ieee80211_tx_data tx = {
2943 .local = sdata->local,
2944 .sdata = sdata,
2945 };
Johannes Berg97ffe752015-03-21 09:13:45 +01002946 struct sta_info *sta;
Johannes Berg7528ec52014-11-09 18:50:11 +02002947
2948 rcu_read_lock();
2949
Johannes Berg97ffe752015-03-21 09:13:45 +01002950 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
2951 kfree_skb(skb);
2952 skb = ERR_PTR(-EINVAL);
2953 goto out;
2954 }
2955
2956 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
Johannes Berg7528ec52014-11-09 18:50:11 +02002957 if (IS_ERR(skb))
2958 goto out;
2959
2960 hdr = (void *)skb->data;
2961 tx.sta = sta_info_get(sdata, hdr->addr1);
2962 tx.skb = skb;
2963
2964 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
2965 rcu_read_unlock();
2966 kfree_skb(skb);
2967 return ERR_PTR(-EINVAL);
2968 }
2969
2970out:
2971 rcu_read_unlock();
2972 return skb;
2973}
2974
Johannes Berge2530082008-05-17 00:57:14 +02002975/*
2976 * ieee80211_clear_tx_pending may not be called in a context where
2977 * it is possible that it packets could come in again.
2978 */
Johannes Berge2ebc742007-07-27 15:43:22 +02002979void ieee80211_clear_tx_pending(struct ieee80211_local *local)
2980{
Felix Fietkau1f98ab72012-11-10 03:44:14 +01002981 struct sk_buff *skb;
Johannes Berg2de8e0d92009-03-23 17:28:35 +01002982 int i;
Johannes Berge2ebc742007-07-27 15:43:22 +02002983
Felix Fietkau1f98ab72012-11-10 03:44:14 +01002984 for (i = 0; i < local->hw.queues; i++) {
2985 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
2986 ieee80211_free_txskb(&local->hw, skb);
2987 }
Johannes Berge2ebc742007-07-27 15:43:22 +02002988}
2989
Johannes Berg7bb45682011-02-24 14:42:06 +01002990/*
2991 * Returns false if the frame couldn't be transmitted but was queued instead,
2992 * which in this case means re-queued -- take as an indication to stop sending
2993 * more pending frames.
2994 */
Johannes Bergcd8ffc82009-03-23 17:28:41 +01002995static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
2996 struct sk_buff *skb)
2997{
2998 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2999 struct ieee80211_sub_if_data *sdata;
3000 struct sta_info *sta;
3001 struct ieee80211_hdr *hdr;
Johannes Berg7bb45682011-02-24 14:42:06 +01003002 bool result;
Johannes Berg55de9082012-07-26 17:24:39 +02003003 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003004
Johannes Berg5061b0c2009-07-14 00:33:34 +02003005 sdata = vif_to_sdata(info->control.vif);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003006
3007 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
Johannes Berg55de9082012-07-26 17:24:39 +02003008 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3009 if (unlikely(!chanctx_conf)) {
3010 dev_kfree_skb(skb);
3011 return true;
3012 }
Johannes Berg73c4e192014-11-09 18:50:09 +02003013 info->band = chanctx_conf->def.chan->band;
Johannes Berg7c107702015-03-20 14:18:27 +01003014 result = ieee80211_tx(sdata, NULL, skb, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003015 } else {
Johannes Berg252b86c2011-11-16 15:28:55 +01003016 struct sk_buff_head skbs;
3017
3018 __skb_queue_head_init(&skbs);
3019 __skb_queue_tail(&skbs, skb);
3020
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003021 hdr = (struct ieee80211_hdr *)skb->data;
Johannes Bergabe60632009-11-25 17:46:18 +01003022 sta = sta_info_get(sdata, hdr->addr1);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003023
Johannes Berg74e4dbf2011-11-16 15:28:57 +01003024 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003025 }
3026
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003027 return result;
3028}
3029
Johannes Berge2530082008-05-17 00:57:14 +02003030/*
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003031 * Transmit all pending packets. Called from tasklet.
Johannes Berge2530082008-05-17 00:57:14 +02003032 */
Johannes Berge2ebc742007-07-27 15:43:22 +02003033void ieee80211_tx_pending(unsigned long data)
3034{
3035 struct ieee80211_local *local = (struct ieee80211_local *)data;
Johannes Berg2a577d92009-03-23 17:28:37 +01003036 unsigned long flags;
Johannes Bergcd8ffc82009-03-23 17:28:41 +01003037 int i;
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003038 bool txok;
Johannes Berge2ebc742007-07-27 15:43:22 +02003039
Johannes Bergf0e72852009-03-23 17:28:36 +01003040 rcu_read_lock();
Johannes Berg2a577d92009-03-23 17:28:37 +01003041
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003042 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
Johannes Berg176be722009-03-12 23:49:28 +01003043 for (i = 0; i < local->hw.queues; i++) {
Johannes Berg2a577d92009-03-23 17:28:37 +01003044 /*
3045 * If queue is stopped by something other than due to pending
3046 * frames, or we have no pending frames, proceed to next queue.
3047 */
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003048 if (local->queue_stop_reasons[i] ||
Johannes Berg2a577d92009-03-23 17:28:37 +01003049 skb_queue_empty(&local->pending[i]))
Johannes Berge2ebc742007-07-27 15:43:22 +02003050 continue;
Johannes Berge2530082008-05-17 00:57:14 +02003051
Johannes Berg2a577d92009-03-23 17:28:37 +01003052 while (!skb_queue_empty(&local->pending[i])) {
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003053 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003054 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg5061b0c2009-07-14 00:33:34 +02003055
Johannes Berga7bc3762009-07-27 10:33:31 +02003056 if (WARN_ON(!info->control.vif)) {
Felix Fietkauc3e77242012-10-08 14:39:33 +02003057 ieee80211_free_txskb(&local->hw, skb);
Johannes Berga7bc3762009-07-27 10:33:31 +02003058 continue;
3059 }
3060
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003061 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3062 flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003063
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003064 txok = ieee80211_tx_pending_skb(local, skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003065 spin_lock_irqsave(&local->queue_stop_reason_lock,
3066 flags);
3067 if (!txok)
Johannes Berg2a577d92009-03-23 17:28:37 +01003068 break;
Johannes Berge2ebc742007-07-27 15:43:22 +02003069 }
Johannes Berg7236fe22010-03-22 13:42:43 -07003070
3071 if (skb_queue_empty(&local->pending[i]))
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003072 ieee80211_propagate_queue_wake(local, i);
Johannes Berge2ebc742007-07-27 15:43:22 +02003073 }
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003074 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
Johannes Berg2a577d92009-03-23 17:28:37 +01003075
Johannes Bergf0e72852009-03-23 17:28:36 +01003076 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003077}
3078
3079/* functions for drivers to get certain frames */
3080
Marco Porscheac70c12013-01-07 16:04:50 +01003081static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003082 struct ps_data *ps, struct sk_buff *skb,
3083 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02003084{
3085 u8 *pos, *tim;
3086 int aid0 = 0;
3087 int i, have_bits = 0, n1, n2;
3088
3089 /* Generate bitmap for TIM only if there are any STAs in power save
3090 * mode. */
Marco Porschd012a602012-10-10 12:39:50 -07003091 if (atomic_read(&ps->num_sta_ps) > 0)
Johannes Berge2ebc742007-07-27 15:43:22 +02003092 /* in the hope that this is faster than
3093 * checking byte-for-byte */
Weilong Chenf359d3f2013-12-18 15:44:16 +08003094 have_bits = !bitmap_empty((unsigned long *)ps->tim,
Johannes Berge2ebc742007-07-27 15:43:22 +02003095 IEEE80211_MAX_AID+1);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003096 if (!is_template) {
3097 if (ps->dtim_count == 0)
3098 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3099 else
3100 ps->dtim_count--;
3101 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003102
3103 tim = pos = (u8 *) skb_put(skb, 6);
3104 *pos++ = WLAN_EID_TIM;
3105 *pos++ = 4;
Marco Porschd012a602012-10-10 12:39:50 -07003106 *pos++ = ps->dtim_count;
Johannes Berg88600202012-02-13 15:17:18 +01003107 *pos++ = sdata->vif.bss_conf.dtim_period;
Johannes Berge2ebc742007-07-27 15:43:22 +02003108
Marco Porschd012a602012-10-10 12:39:50 -07003109 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
Johannes Berge2ebc742007-07-27 15:43:22 +02003110 aid0 = 1;
3111
Marco Porschd012a602012-10-10 12:39:50 -07003112 ps->dtim_bc_mc = aid0 == 1;
Christian Lamparter512119b2011-01-31 20:48:44 +02003113
Johannes Berge2ebc742007-07-27 15:43:22 +02003114 if (have_bits) {
3115 /* Find largest even number N1 so that bits numbered 1 through
3116 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3117 * (N2 + 1) x 8 through 2007 are 0. */
3118 n1 = 0;
3119 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
Marco Porschd012a602012-10-10 12:39:50 -07003120 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003121 n1 = i & 0xfe;
3122 break;
3123 }
3124 }
3125 n2 = n1;
3126 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
Marco Porschd012a602012-10-10 12:39:50 -07003127 if (ps->tim[i]) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003128 n2 = i;
3129 break;
3130 }
3131 }
3132
3133 /* Bitmap control */
3134 *pos++ = n1 | aid0;
3135 /* Part Virt Bitmap */
Eliad Peller5220da32011-11-24 16:50:00 +02003136 skb_put(skb, n2 - n1);
Marco Porschd012a602012-10-10 12:39:50 -07003137 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
Johannes Berge2ebc742007-07-27 15:43:22 +02003138
3139 tim[1] = n2 - n1 + 4;
Johannes Berge2ebc742007-07-27 15:43:22 +02003140 } else {
3141 *pos++ = aid0; /* Bitmap control */
3142 *pos++ = 0; /* Part Virt Bitmap */
3143 }
Johannes Berge2ebc742007-07-27 15:43:22 +02003144}
3145
Marco Porscheac70c12013-01-07 16:04:50 +01003146static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003147 struct ps_data *ps, struct sk_buff *skb,
3148 bool is_template)
Marco Porscheac70c12013-01-07 16:04:50 +01003149{
3150 struct ieee80211_local *local = sdata->local;
3151
3152 /*
3153 * Not very nice, but we want to allow the driver to call
3154 * ieee80211_beacon_get() as a response to the set_tim()
3155 * callback. That, however, is already invoked under the
3156 * sta_lock to guarantee consistent and race-free update
3157 * of the tim bitmap in mac80211 and the driver.
3158 */
3159 if (local->tim_in_locked_section) {
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003160 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Marco Porscheac70c12013-01-07 16:04:50 +01003161 } else {
Johannes Berg1b917312013-02-22 12:55:01 +01003162 spin_lock_bh(&local->tim_lock);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003163 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
Johannes Berg1b917312013-02-22 12:55:01 +01003164 spin_unlock_bh(&local->tim_lock);
Marco Porscheac70c12013-01-07 16:04:50 +01003165 }
3166
3167 return 0;
3168}
3169
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003170static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3171 struct beacon_data *beacon)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003172{
3173 struct probe_resp *resp;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003174 u8 *beacon_data;
3175 size_t beacon_data_len;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003176 int i;
Michal Kazioraf296bd2014-06-05 14:21:36 +02003177 u8 count = beacon->csa_current_counter;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003178
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003179 switch (sdata->vif.type) {
3180 case NL80211_IFTYPE_AP:
3181 beacon_data = beacon->tail;
3182 beacon_data_len = beacon->tail_len;
3183 break;
3184 case NL80211_IFTYPE_ADHOC:
3185 beacon_data = beacon->head;
3186 beacon_data_len = beacon->head_len;
3187 break;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003188 case NL80211_IFTYPE_MESH_POINT:
3189 beacon_data = beacon->head;
3190 beacon_data_len = beacon->head_len;
3191 break;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003192 default:
3193 return;
3194 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003195
Michal Kazioraf296bd2014-06-05 14:21:36 +02003196 rcu_read_lock();
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003197 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02003198 resp = rcu_dereference(sdata->u.ap.probe_resp);
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003199
Michal Kazioraf296bd2014-06-05 14:21:36 +02003200 if (beacon->csa_counter_offsets[i]) {
3201 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3202 beacon_data_len)) {
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003203 rcu_read_unlock();
3204 return;
3205 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02003206
3207 beacon_data[beacon->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003208 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02003209
3210 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3211 resp->data[resp->csa_counter_offsets[i]] = count;
Andrei Otcheretianski0d06d9b2014-05-09 14:11:47 +03003212 }
Michal Kazioraf296bd2014-06-05 14:21:36 +02003213 rcu_read_unlock();
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003214}
3215
3216u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3217{
3218 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003219 struct beacon_data *beacon = NULL;
3220 u8 count = 0;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003221
Michal Kazioraf296bd2014-06-05 14:21:36 +02003222 rcu_read_lock();
3223
3224 if (sdata->vif.type == NL80211_IFTYPE_AP)
3225 beacon = rcu_dereference(sdata->u.ap.beacon);
3226 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3227 beacon = rcu_dereference(sdata->u.ibss.presp);
3228 else if (ieee80211_vif_is_mesh(&sdata->vif))
3229 beacon = rcu_dereference(sdata->u.mesh.beacon);
3230
3231 if (!beacon)
3232 goto unlock;
3233
3234 beacon->csa_current_counter--;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003235
3236 /* the counter should never reach 0 */
Michal Kazioraf296bd2014-06-05 14:21:36 +02003237 WARN_ON_ONCE(!beacon->csa_current_counter);
3238 count = beacon->csa_current_counter;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003239
Michal Kazioraf296bd2014-06-05 14:21:36 +02003240unlock:
3241 rcu_read_unlock();
3242 return count;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003243}
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003244EXPORT_SYMBOL(ieee80211_csa_update_counter);
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003245
3246bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
3247{
3248 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3249 struct beacon_data *beacon = NULL;
3250 u8 *beacon_data;
3251 size_t beacon_data_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003252 int ret = false;
3253
3254 if (!ieee80211_sdata_running(sdata))
3255 return false;
3256
3257 rcu_read_lock();
3258 if (vif->type == NL80211_IFTYPE_AP) {
3259 struct ieee80211_if_ap *ap = &sdata->u.ap;
3260
3261 beacon = rcu_dereference(ap->beacon);
3262 if (WARN_ON(!beacon || !beacon->tail))
3263 goto out;
3264 beacon_data = beacon->tail;
3265 beacon_data_len = beacon->tail_len;
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003266 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
3267 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3268
3269 beacon = rcu_dereference(ifibss->presp);
3270 if (!beacon)
3271 goto out;
3272
3273 beacon_data = beacon->head;
3274 beacon_data_len = beacon->head_len;
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003275 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
3276 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3277
3278 beacon = rcu_dereference(ifmsh->beacon);
3279 if (!beacon)
3280 goto out;
3281
3282 beacon_data = beacon->head;
3283 beacon_data_len = beacon->head_len;
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003284 } else {
3285 WARN_ON(1);
3286 goto out;
3287 }
3288
Michal Kazior10d78f22014-06-05 14:21:37 +02003289 if (!beacon->csa_counter_offsets[0])
3290 goto out;
3291
Michal Kazioraf296bd2014-06-05 14:21:36 +02003292 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003293 goto out;
3294
Michal Kazioraf296bd2014-06-05 14:21:36 +02003295 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003296 ret = true;
3297 out:
3298 rcu_read_unlock();
3299
3300 return ret;
3301}
3302EXPORT_SYMBOL(ieee80211_csa_is_complete);
3303
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003304static struct sk_buff *
3305__ieee80211_beacon_get(struct ieee80211_hw *hw,
3306 struct ieee80211_vif *vif,
3307 struct ieee80211_mutable_offsets *offs,
3308 bool is_template)
Johannes Berge2ebc742007-07-27 15:43:22 +02003309{
3310 struct ieee80211_local *local = hw_to_local(hw);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003311 struct beacon_data *beacon = NULL;
Johannes Berg9d139c82008-07-09 14:40:37 +02003312 struct sk_buff *skb = NULL;
Johannes Berge039fa42008-05-15 12:55:29 +02003313 struct ieee80211_tx_info *info;
Johannes Berge2ebc742007-07-27 15:43:22 +02003314 struct ieee80211_sub_if_data *sdata = NULL;
Johannes Berg55de9082012-07-26 17:24:39 +02003315 enum ieee80211_band band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003316 struct ieee80211_tx_rate_control txrc;
Johannes Berg55de9082012-07-26 17:24:39 +02003317 struct ieee80211_chanctx_conf *chanctx_conf;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003318 int csa_off_base = 0;
Johannes Berg8318d782008-01-24 19:38:38 +01003319
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003320 rcu_read_lock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003321
Johannes Berg32bfd352007-12-19 01:31:26 +01003322 sdata = vif_to_sdata(vif);
Johannes Berg55de9082012-07-26 17:24:39 +02003323 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berge2ebc742007-07-27 15:43:22 +02003324
Johannes Berg55de9082012-07-26 17:24:39 +02003325 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
Felix Fietkaueb3e5542011-01-24 19:28:49 +01003326 goto out;
3327
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003328 if (offs)
3329 memset(offs, 0, sizeof(*offs));
Johannes Bergeddcbb942009-10-29 08:30:35 +01003330
Johannes Berg05c914f2008-09-11 00:01:58 +02003331 if (sdata->vif.type == NL80211_IFTYPE_AP) {
Marco Porschd012a602012-10-10 12:39:50 -07003332 struct ieee80211_if_ap *ap = &sdata->u.ap;
Marco Porschd012a602012-10-10 12:39:50 -07003333
Michal Kazioraf296bd2014-06-05 14:21:36 +02003334 beacon = rcu_dereference(ap->beacon);
Dan Carpenter3ad97fbc2011-02-07 22:03:35 +03003335 if (beacon) {
Michal Kazior10d78f22014-06-05 14:21:37 +02003336 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003337 if (!is_template)
3338 ieee80211_csa_update_counter(vif);
3339
3340 ieee80211_set_csa(sdata, beacon);
3341 }
Simon Wunderlich73da7d52013-07-11 16:09:06 +02003342
Johannes Berg902acc72008-02-23 15:17:19 +01003343 /*
3344 * headroom, head length,
3345 * tail length and maximum TIM length
3346 */
3347 skb = dev_alloc_skb(local->tx_headroom +
3348 beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01003349 beacon->tail_len + 256 +
3350 local->hw.extra_beacon_tailroom);
Johannes Berg902acc72008-02-23 15:17:19 +01003351 if (!skb)
3352 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003353
Johannes Berg902acc72008-02-23 15:17:19 +01003354 skb_reserve(skb, local->tx_headroom);
3355 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3356 beacon->head_len);
3357
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003358 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
3359 is_template);
Johannes Berg902acc72008-02-23 15:17:19 +01003360
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003361 if (offs) {
3362 offs->tim_offset = beacon->head_len;
3363 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003364
3365 /* for AP the csa offsets are from tail */
3366 csa_off_base = skb->len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003367 }
Johannes Bergeddcbb942009-10-29 08:30:35 +01003368
Johannes Berg902acc72008-02-23 15:17:19 +01003369 if (beacon->tail)
3370 memcpy(skb_put(skb, beacon->tail_len),
3371 beacon->tail, beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02003372 } else
3373 goto out;
Johannes Berg05c914f2008-09-11 00:01:58 +02003374 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
Johannes Berg46900292009-02-15 12:44:28 +01003375 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
Johannes Berg9d139c82008-07-09 14:40:37 +02003376 struct ieee80211_hdr *hdr;
Johannes Berg902acc72008-02-23 15:17:19 +01003377
Michal Kazioraf296bd2014-06-05 14:21:36 +02003378 beacon = rcu_dereference(ifibss->presp);
3379 if (!beacon)
Johannes Berg9d139c82008-07-09 14:40:37 +02003380 goto out;
3381
Michal Kazior10d78f22014-06-05 14:21:37 +02003382 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003383 if (!is_template)
3384 ieee80211_csa_update_counter(vif);
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003385
Michal Kazioraf296bd2014-06-05 14:21:36 +02003386 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003387 }
Simon Wunderlichcd7760e2013-08-28 13:41:31 +02003388
Michal Kazioraf296bd2014-06-05 14:21:36 +02003389 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01003390 local->hw.extra_beacon_tailroom);
Johannes Berg9d139c82008-07-09 14:40:37 +02003391 if (!skb)
3392 goto out;
Johannes Bergc3ffeab2013-03-07 20:54:29 +01003393 skb_reserve(skb, local->tx_headroom);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003394 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3395 beacon->head_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02003396
3397 hdr = (struct ieee80211_hdr *) skb->data;
Harvey Harrisone7827a72008-07-15 18:44:13 -07003398 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3399 IEEE80211_STYPE_BEACON);
Johannes Berg902acc72008-02-23 15:17:19 +01003400 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
Javier Cardonadbf498f2012-03-31 11:31:32 -07003401 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
Johannes Berg472dbc42008-09-11 00:01:49 +02003402
Michal Kazioraf296bd2014-06-05 14:21:36 +02003403 beacon = rcu_dereference(ifmsh->beacon);
3404 if (!beacon)
Johannes Bergac1bd842011-01-18 13:45:32 +01003405 goto out;
Johannes Bergac1bd842011-01-18 13:45:32 +01003406
Michal Kazior10d78f22014-06-05 14:21:37 +02003407 if (beacon->csa_counter_offsets[0]) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003408 if (!is_template)
3409 /* TODO: For mesh csa_counter is in TU, so
3410 * decrementing it by one isn't correct, but
3411 * for now we leave it consistent with overall
3412 * mac80211's behavior.
3413 */
3414 ieee80211_csa_update_counter(vif);
3415
Michal Kazioraf296bd2014-06-05 14:21:36 +02003416 ieee80211_set_csa(sdata, beacon);
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003417 }
Chun-Yeow Yeohb8456a12013-10-17 15:55:02 -07003418
Javier Cardonadbf498f2012-03-31 11:31:32 -07003419 if (ifmsh->sync_ops)
Michal Kazioraf296bd2014-06-05 14:21:36 +02003420 ifmsh->sync_ops->adjust_tbtt(sdata, beacon);
Javier Cardonadbf498f2012-03-31 11:31:32 -07003421
Thomas Pedersen3b69a9c2011-10-26 14:47:25 -07003422 skb = dev_alloc_skb(local->tx_headroom +
Michal Kazioraf296bd2014-06-05 14:21:36 +02003423 beacon->head_len +
Marco Porsch3f52b7e2013-01-30 18:14:08 +01003424 256 + /* TIM IE */
Michal Kazioraf296bd2014-06-05 14:21:36 +02003425 beacon->tail_len +
Felix Fietkau70dabeb2013-12-14 13:54:53 +01003426 local->hw.extra_beacon_tailroom);
Luis Carlos Cobo33b64eb2008-02-23 15:17:10 +01003427 if (!skb)
3428 goto out;
Thomas Pedersen2b5e1962013-02-14 11:20:13 -08003429 skb_reserve(skb, local->tx_headroom);
Michal Kazioraf296bd2014-06-05 14:21:36 +02003430 memcpy(skb_put(skb, beacon->head_len), beacon->head,
3431 beacon->head_len);
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003432 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
3433
3434 if (offs) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02003435 offs->tim_offset = beacon->head_len;
3436 offs->tim_length = skb->len - beacon->head_len;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003437 }
3438
Michal Kazioraf296bd2014-06-05 14:21:36 +02003439 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
3440 beacon->tail_len);
Johannes Berg9d139c82008-07-09 14:40:37 +02003441 } else {
3442 WARN_ON(1);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003443 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02003444 }
3445
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003446 /* CSA offsets */
Michal Kazioraf296bd2014-06-05 14:21:36 +02003447 if (offs && beacon) {
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003448 int i;
3449
3450 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
Michal Kazioraf296bd2014-06-05 14:21:36 +02003451 u16 csa_off = beacon->csa_counter_offsets[i];
Andrei Otcheretianski1af586c2014-05-09 14:11:50 +03003452
3453 if (!csa_off)
3454 continue;
3455
3456 offs->csa_counter_offs[i] = csa_off_base + csa_off;
3457 }
3458 }
3459
Johannes Berg4bf88532012-11-09 11:39:59 +01003460 band = chanctx_conf->def.chan->band;
Johannes Berg55de9082012-07-26 17:24:39 +02003461
Johannes Berge039fa42008-05-15 12:55:29 +02003462 info = IEEE80211_SKB_CB(skb);
Johannes Berge2ebc742007-07-27 15:43:22 +02003463
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003464 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003465 info->flags |= IEEE80211_TX_CTL_NO_ACK;
Johannes Berge039fa42008-05-15 12:55:29 +02003466 info->band = band;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003467
3468 memset(&txrc, 0, sizeof(txrc));
3469 txrc.hw = hw;
Johannes Berge31583c2012-07-26 14:07:46 +02003470 txrc.sband = local->hw.wiphy->bands[band];
Jouni Malinene00cfce2009-12-29 12:59:19 +02003471 txrc.bss_conf = &sdata->vif.bss_conf;
3472 txrc.skb = skb;
3473 txrc.reported_rate.idx = -1;
Jouni Malinen37eb0b12010-01-06 13:09:08 +02003474 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
Johannes Berge31583c2012-07-26 14:07:46 +02003475 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
Jouni Malinen37eb0b12010-01-06 13:09:08 +02003476 txrc.max_rate_idx = -1;
3477 else
3478 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
Felix Fietkau8f0729b2010-11-11 15:07:23 +01003479 txrc.bss = true;
Jouni Malinene00cfce2009-12-29 12:59:19 +02003480 rate_control_get_rate(sdata, NULL, &txrc);
Johannes Berge039fa42008-05-15 12:55:29 +02003481
3482 info->control.vif = vif;
Johannes Bergf591fa52008-07-10 11:21:26 +02003483
John W. Linvillea472e712010-05-06 14:45:17 -04003484 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
3485 IEEE80211_TX_CTL_ASSIGN_SEQ |
3486 IEEE80211_TX_CTL_FIRST_FRAGMENT;
Johannes Berge6a98542008-10-21 12:40:02 +02003487 out:
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003488 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003489 return skb;
Andrei Otcheretianski6ec8c332014-05-09 14:11:49 +03003490
3491}
3492
3493struct sk_buff *
3494ieee80211_beacon_get_template(struct ieee80211_hw *hw,
3495 struct ieee80211_vif *vif,
3496 struct ieee80211_mutable_offsets *offs)
3497{
3498 return __ieee80211_beacon_get(hw, vif, offs, true);
3499}
3500EXPORT_SYMBOL(ieee80211_beacon_get_template);
3501
3502struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
3503 struct ieee80211_vif *vif,
3504 u16 *tim_offset, u16 *tim_length)
3505{
3506 struct ieee80211_mutable_offsets offs = {};
3507 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
3508
3509 if (tim_offset)
3510 *tim_offset = offs.tim_offset;
3511
3512 if (tim_length)
3513 *tim_length = offs.tim_length;
3514
3515 return bcn;
Johannes Berge2ebc742007-07-27 15:43:22 +02003516}
Johannes Bergeddcbb942009-10-29 08:30:35 +01003517EXPORT_SYMBOL(ieee80211_beacon_get_tim);
Johannes Berge2ebc742007-07-27 15:43:22 +02003518
Arik Nemtsov02945822011-11-10 11:28:57 +02003519struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
3520 struct ieee80211_vif *vif)
3521{
3522 struct ieee80211_if_ap *ap = NULL;
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03003523 struct sk_buff *skb = NULL;
3524 struct probe_resp *presp = NULL;
Arik Nemtsov02945822011-11-10 11:28:57 +02003525 struct ieee80211_hdr *hdr;
3526 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3527
3528 if (sdata->vif.type != NL80211_IFTYPE_AP)
3529 return NULL;
3530
3531 rcu_read_lock();
3532
3533 ap = &sdata->u.ap;
3534 presp = rcu_dereference(ap->probe_resp);
3535 if (!presp)
3536 goto out;
3537
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03003538 skb = dev_alloc_skb(presp->len);
Arik Nemtsov02945822011-11-10 11:28:57 +02003539 if (!skb)
3540 goto out;
3541
Eyal Shapiraaa7a0082012-08-06 14:26:16 +03003542 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
3543
Arik Nemtsov02945822011-11-10 11:28:57 +02003544 hdr = (struct ieee80211_hdr *) skb->data;
3545 memset(hdr->addr1, 0, sizeof(hdr->addr1));
3546
3547out:
3548 rcu_read_unlock();
3549 return skb;
3550}
3551EXPORT_SYMBOL(ieee80211_proberesp_get);
3552
Kalle Valo7044cc52010-01-05 20:16:19 +02003553struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
3554 struct ieee80211_vif *vif)
3555{
3556 struct ieee80211_sub_if_data *sdata;
3557 struct ieee80211_if_managed *ifmgd;
3558 struct ieee80211_pspoll *pspoll;
3559 struct ieee80211_local *local;
3560 struct sk_buff *skb;
3561
3562 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
3563 return NULL;
3564
3565 sdata = vif_to_sdata(vif);
3566 ifmgd = &sdata->u.mgd;
3567 local = sdata->local;
3568
3569 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
Joe Perchesd15b8452011-08-29 14:17:31 -07003570 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02003571 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07003572
Kalle Valo7044cc52010-01-05 20:16:19 +02003573 skb_reserve(skb, local->hw.extra_tx_headroom);
3574
3575 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
3576 memset(pspoll, 0, sizeof(*pspoll));
3577 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
3578 IEEE80211_STYPE_PSPOLL);
3579 pspoll->aid = cpu_to_le16(ifmgd->aid);
3580
3581 /* aid in PS-Poll has its two MSBs each set to 1 */
3582 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
3583
3584 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
3585 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
3586
3587 return skb;
3588}
3589EXPORT_SYMBOL(ieee80211_pspoll_get);
3590
3591struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
3592 struct ieee80211_vif *vif)
3593{
3594 struct ieee80211_hdr_3addr *nullfunc;
3595 struct ieee80211_sub_if_data *sdata;
3596 struct ieee80211_if_managed *ifmgd;
3597 struct ieee80211_local *local;
3598 struct sk_buff *skb;
3599
3600 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
3601 return NULL;
3602
3603 sdata = vif_to_sdata(vif);
3604 ifmgd = &sdata->u.mgd;
3605 local = sdata->local;
3606
3607 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
Joe Perchesd15b8452011-08-29 14:17:31 -07003608 if (!skb)
Kalle Valo7044cc52010-01-05 20:16:19 +02003609 return NULL;
Joe Perchesd15b8452011-08-29 14:17:31 -07003610
Kalle Valo7044cc52010-01-05 20:16:19 +02003611 skb_reserve(skb, local->hw.extra_tx_headroom);
3612
3613 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
3614 sizeof(*nullfunc));
3615 memset(nullfunc, 0, sizeof(*nullfunc));
3616 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
3617 IEEE80211_STYPE_NULLFUNC |
3618 IEEE80211_FCTL_TODS);
3619 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
3620 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
3621 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
3622
3623 return skb;
3624}
3625EXPORT_SYMBOL(ieee80211_nullfunc_get);
3626
Kalle Valo05e54ea2010-01-05 20:16:38 +02003627struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
Johannes Berga344d672014-06-12 22:24:31 +02003628 const u8 *src_addr,
Kalle Valo05e54ea2010-01-05 20:16:38 +02003629 const u8 *ssid, size_t ssid_len,
Johannes Bergb9a9ada2012-11-29 13:00:10 +01003630 size_t tailroom)
Kalle Valo05e54ea2010-01-05 20:16:38 +02003631{
Johannes Berga344d672014-06-12 22:24:31 +02003632 struct ieee80211_local *local = hw_to_local(hw);
Kalle Valo05e54ea2010-01-05 20:16:38 +02003633 struct ieee80211_hdr_3addr *hdr;
3634 struct sk_buff *skb;
3635 size_t ie_ssid_len;
3636 u8 *pos;
3637
Kalle Valo05e54ea2010-01-05 20:16:38 +02003638 ie_ssid_len = 2 + ssid_len;
3639
3640 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
Johannes Bergb9a9ada2012-11-29 13:00:10 +01003641 ie_ssid_len + tailroom);
Joe Perchesd15b8452011-08-29 14:17:31 -07003642 if (!skb)
Kalle Valo05e54ea2010-01-05 20:16:38 +02003643 return NULL;
Kalle Valo05e54ea2010-01-05 20:16:38 +02003644
3645 skb_reserve(skb, local->hw.extra_tx_headroom);
3646
3647 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
3648 memset(hdr, 0, sizeof(*hdr));
3649 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3650 IEEE80211_STYPE_PROBE_REQ);
Johannes Berge83e6542012-07-13 16:23:07 +02003651 eth_broadcast_addr(hdr->addr1);
Johannes Berga344d672014-06-12 22:24:31 +02003652 memcpy(hdr->addr2, src_addr, ETH_ALEN);
Johannes Berge83e6542012-07-13 16:23:07 +02003653 eth_broadcast_addr(hdr->addr3);
Kalle Valo05e54ea2010-01-05 20:16:38 +02003654
3655 pos = skb_put(skb, ie_ssid_len);
3656 *pos++ = WLAN_EID_SSID;
3657 *pos++ = ssid_len;
Stanislaw Gruszka88c868c2012-03-29 16:30:41 +02003658 if (ssid_len)
Kalle Valo05e54ea2010-01-05 20:16:38 +02003659 memcpy(pos, ssid, ssid_len);
3660 pos += ssid_len;
3661
Kalle Valo05e54ea2010-01-05 20:16:38 +02003662 return skb;
3663}
3664EXPORT_SYMBOL(ieee80211_probereq_get);
3665
Johannes Berg32bfd352007-12-19 01:31:26 +01003666void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02003667 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02003668 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02003669 struct ieee80211_rts *rts)
3670{
3671 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02003672
Harvey Harrison065e96052008-06-22 16:45:27 -07003673 rts->frame_control =
3674 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01003675 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
3676 frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02003677 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
3678 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
3679}
3680EXPORT_SYMBOL(ieee80211_rts_get);
3681
Johannes Berg32bfd352007-12-19 01:31:26 +01003682void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
Johannes Berge2ebc742007-07-27 15:43:22 +02003683 const void *frame, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +02003684 const struct ieee80211_tx_info *frame_txctl,
Johannes Berge2ebc742007-07-27 15:43:22 +02003685 struct ieee80211_cts *cts)
3686{
3687 const struct ieee80211_hdr *hdr = frame;
Johannes Berge2ebc742007-07-27 15:43:22 +02003688
Harvey Harrison065e96052008-06-22 16:45:27 -07003689 cts->frame_control =
3690 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
Johannes Berg32bfd352007-12-19 01:31:26 +01003691 cts->duration = ieee80211_ctstoself_duration(hw, vif,
3692 frame_len, frame_txctl);
Johannes Berge2ebc742007-07-27 15:43:22 +02003693 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
3694}
3695EXPORT_SYMBOL(ieee80211_ctstoself_get);
3696
3697struct sk_buff *
Johannes Berg32bfd352007-12-19 01:31:26 +01003698ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
Johannes Berge039fa42008-05-15 12:55:29 +02003699 struct ieee80211_vif *vif)
Johannes Berge2ebc742007-07-27 15:43:22 +02003700{
3701 struct ieee80211_local *local = hw_to_local(hw);
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003702 struct sk_buff *skb = NULL;
Johannes Berg5cf121c2008-02-25 16:27:43 +01003703 struct ieee80211_tx_data tx;
Johannes Berge2ebc742007-07-27 15:43:22 +02003704 struct ieee80211_sub_if_data *sdata;
Marco Porschd012a602012-10-10 12:39:50 -07003705 struct ps_data *ps;
Johannes Berge039fa42008-05-15 12:55:29 +02003706 struct ieee80211_tx_info *info;
Johannes Berg55de9082012-07-26 17:24:39 +02003707 struct ieee80211_chanctx_conf *chanctx_conf;
Johannes Berge2ebc742007-07-27 15:43:22 +02003708
Johannes Berg32bfd352007-12-19 01:31:26 +01003709 sdata = vif_to_sdata(vif);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003710
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003711 rcu_read_lock();
Johannes Berg55de9082012-07-26 17:24:39 +02003712 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003713
Marco Porschd012a602012-10-10 12:39:50 -07003714 if (!chanctx_conf)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003715 goto out;
Johannes Berg5dfdaf52007-12-19 02:03:33 +01003716
Marco Porschd012a602012-10-10 12:39:50 -07003717 if (sdata->vif.type == NL80211_IFTYPE_AP) {
3718 struct beacon_data *beacon =
3719 rcu_dereference(sdata->u.ap.beacon);
3720
3721 if (!beacon || !beacon->head)
3722 goto out;
3723
3724 ps = &sdata->u.ap.ps;
Marco Porsch3f52b7e2013-01-30 18:14:08 +01003725 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3726 ps = &sdata->u.mesh.ps;
Marco Porschd012a602012-10-10 12:39:50 -07003727 } else {
3728 goto out;
3729 }
3730
3731 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003732 goto out; /* send buffered bc/mc only after DTIM beacon */
Johannes Berge039fa42008-05-15 12:55:29 +02003733
Johannes Berge2ebc742007-07-27 15:43:22 +02003734 while (1) {
Marco Porschd012a602012-10-10 12:39:50 -07003735 skb = skb_dequeue(&ps->bc_buf);
Johannes Berge2ebc742007-07-27 15:43:22 +02003736 if (!skb)
Tomas Winkler747cf5e2008-05-27 17:50:51 +03003737 goto out;
Johannes Berge2ebc742007-07-27 15:43:22 +02003738 local->total_ps_buffered--;
3739
Marco Porschd012a602012-10-10 12:39:50 -07003740 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
Johannes Berge2ebc742007-07-27 15:43:22 +02003741 struct ieee80211_hdr *hdr =
3742 (struct ieee80211_hdr *) skb->data;
3743 /* more buffered multicast/broadcast frames ==> set
3744 * MoreData flag in IEEE 802.11 header to inform PS
3745 * STAs */
3746 hdr->frame_control |=
3747 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
3748 }
3749
Michael Braun112c44b2014-03-06 15:08:43 +01003750 if (sdata->vif.type == NL80211_IFTYPE_AP)
Marco Porsch7cbf9d02013-03-01 16:01:18 +01003751 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
Johannes Berg7c107702015-03-20 14:18:27 +01003752 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
Johannes Berge2ebc742007-07-27 15:43:22 +02003753 break;
3754 dev_kfree_skb_any(skb);
3755 }
Johannes Berge039fa42008-05-15 12:55:29 +02003756
3757 info = IEEE80211_SKB_CB(skb);
3758
Johannes Berg5cf121c2008-02-25 16:27:43 +01003759 tx.flags |= IEEE80211_TX_PS_BUFFERED;
Johannes Berg4bf88532012-11-09 11:39:59 +01003760 info->band = chanctx_conf->def.chan->band;
Johannes Berge2ebc742007-07-27 15:43:22 +02003761
Johannes Berg97b045d2008-06-20 01:22:30 +02003762 if (invoke_tx_handlers(&tx))
Johannes Berge2ebc742007-07-27 15:43:22 +02003763 skb = NULL;
Johannes Berg97b045d2008-06-20 01:22:30 +02003764 out:
Johannes Bergd0709a62008-02-25 16:27:46 +01003765 rcu_read_unlock();
Johannes Berge2ebc742007-07-27 15:43:22 +02003766
3767 return skb;
3768}
3769EXPORT_SYMBOL(ieee80211_get_buffered_bc);
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003770
Liad Kaufmanb6da9112014-11-19 13:47:38 +02003771int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
3772{
3773 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
3774 struct ieee80211_sub_if_data *sdata = sta->sdata;
3775 struct ieee80211_local *local = sdata->local;
3776 int ret;
3777 u32 queues;
3778
3779 lockdep_assert_held(&local->sta_mtx);
3780
3781 /* only some cases are supported right now */
3782 switch (sdata->vif.type) {
3783 case NL80211_IFTYPE_STATION:
3784 case NL80211_IFTYPE_AP:
3785 case NL80211_IFTYPE_AP_VLAN:
3786 break;
3787 default:
3788 WARN_ON(1);
3789 return -EINVAL;
3790 }
3791
3792 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
3793 return -EINVAL;
3794
3795 if (sta->reserved_tid == tid) {
3796 ret = 0;
3797 goto out;
3798 }
3799
3800 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
3801 sdata_err(sdata, "TID reservation already active\n");
3802 ret = -EALREADY;
3803 goto out;
3804 }
3805
3806 ieee80211_stop_vif_queues(sdata->local, sdata,
3807 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
3808
3809 synchronize_net();
3810
3811 /* Tear down BA sessions so we stop aggregating on this TID */
Johannes Berg30686bf2015-06-02 21:39:54 +02003812 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
Liad Kaufmanb6da9112014-11-19 13:47:38 +02003813 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
3814 __ieee80211_stop_tx_ba_session(sta, tid,
3815 AGG_STOP_LOCAL_REQUEST);
3816 }
3817
3818 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
Emmanuel Grumbach3b24f4c2015-01-07 15:42:39 +02003819 __ieee80211_flush_queues(local, sdata, queues, false);
Liad Kaufmanb6da9112014-11-19 13:47:38 +02003820
3821 sta->reserved_tid = tid;
3822
3823 ieee80211_wake_vif_queues(local, sdata,
3824 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
3825
Johannes Berg30686bf2015-06-02 21:39:54 +02003826 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
Liad Kaufmanb6da9112014-11-19 13:47:38 +02003827 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
3828
3829 ret = 0;
3830 out:
3831 return ret;
3832}
3833EXPORT_SYMBOL(ieee80211_reserve_tid);
3834
3835void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
3836{
3837 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
3838 struct ieee80211_sub_if_data *sdata = sta->sdata;
3839
3840 lockdep_assert_held(&sdata->local->sta_mtx);
3841
3842 /* only some cases are supported right now */
3843 switch (sdata->vif.type) {
3844 case NL80211_IFTYPE_STATION:
3845 case NL80211_IFTYPE_AP:
3846 case NL80211_IFTYPE_AP_VLAN:
3847 break;
3848 default:
3849 WARN_ON(1);
3850 return;
3851 }
3852
3853 if (tid != sta->reserved_tid) {
3854 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
3855 return;
3856 }
3857
3858 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
3859}
3860EXPORT_SYMBOL(ieee80211_unreserve_tid);
3861
Johannes Berg55de9082012-07-26 17:24:39 +02003862void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
3863 struct sk_buff *skb, int tid,
3864 enum ieee80211_band band)
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003865{
Christian Lamparter353d09c2012-07-07 15:07:13 +02003866 int ac = ieee802_1d_to_ac[tid & 7];
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003867
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003868 skb_set_mac_header(skb, 0);
3869 skb_set_network_header(skb, 0);
3870 skb_set_transport_header(skb, 0);
3871
Johannes Berg3a25a8c2012-04-03 16:28:50 +02003872 skb_set_queue_mapping(skb, ac);
Helmut Schaacf6bb792011-12-15 10:18:34 +01003873 skb->priority = tid;
Johannes Bergcf0277e2010-01-05 18:00:58 +01003874
Johannes Berg89afe612013-02-13 15:39:57 +01003875 skb->dev = sdata->dev;
3876
Johannes Berg3d34deb2009-06-18 17:25:11 +02003877 /*
3878 * The other path calling ieee80211_xmit is from the tasklet,
3879 * and while we can handle concurrent transmissions locking
3880 * requirements are that we do not come into tx with bhs on.
3881 */
3882 local_bh_disable();
Johannes Berg73c4e192014-11-09 18:50:09 +02003883 IEEE80211_SKB_CB(skb)->band = band;
Johannes Berg7c107702015-03-20 14:18:27 +01003884 ieee80211_xmit(sdata, NULL, skb);
Johannes Berg3d34deb2009-06-18 17:25:11 +02003885 local_bh_enable();
Johannes Berg3b8d81e02009-06-17 17:43:56 +02003886}