]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - net/mac80211/tx.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'fbdev-v4.12' of git://github.com/bzolnier/linux
[mirror_ubuntu-artful-kernel.git] / net / mac80211 / tx.c
CommitLineData
e2ebc74d
JB		 1/*
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>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
e2ebc74d
JB		 7 *
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>
ebceec86 19#include <linux/if_vlan.h>
e2ebc74d
JB		 20#include <linux/etherdevice.h>
21#include <linux/bitmap.h>
d4e46a3d 22#include <linux/rcupdate.h>
bc3b2d7f 23#include <linux/export.h>
881d966b 24#include <net/net_namespace.h>
e2ebc74d
JB		 25#include <net/ieee80211_radiotap.h>
26#include <net/cfg80211.h>
27#include <net/mac80211.h>
5caa328e
MK		 28#include <net/codel.h>
29#include <net/codel_impl.h>
e2ebc74d 30#include <asm/unaligned.h>
fa962b92 31#include <net/fq_impl.h>
e2ebc74d
JB		 32
33#include "ieee80211_i.h"
24487981 34#include "driver-ops.h"
2c8dccc7 35#include "led.h"
33b64eb2 36#include "mesh.h"
e2ebc74d
JB		 37#include "wep.h"
38#include "wpa.h"
39#include "wme.h"
2c8dccc7 40#include "rate.h"
e2ebc74d 41
e2ebc74d
JB		 42/* misc utils */
43
5a490510
JB		 44static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
45{
46 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
47
48 u64_stats_update_begin(&tstats->syncp);
49 tstats->tx_packets++;
50 tstats->tx_bytes += len;
51 u64_stats_update_end(&tstats->syncp);
52}
53
252b86c4
JB		 54static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
55 struct sk_buff *skb, int group_addr,
03f93c3d 56 int next_frag_len)
e2ebc74d 57{
2103dec1 58 int rate, mrate, erp, dur, i, shift = 0;
2e92e6f2 59 struct ieee80211_rate *txrate;
e2ebc74d 60 struct ieee80211_local *local = tx->local;
8318d78a 61 struct ieee80211_supported_band *sband;
358c8d9d 62 struct ieee80211_hdr *hdr;
252b86c4 63 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1
SW		 64 struct ieee80211_chanctx_conf *chanctx_conf;
65 u32 rate_flags = 0;
66
95cd470c
FF		 67 /* assume HW handles this */
68 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
69 return 0;
70
2103dec1
SW		 71 rcu_read_lock();
72 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
73 if (chanctx_conf) {
74 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
75 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
76 }
77 rcu_read_unlock();
e6a9854b 78
e6a9854b 79 /* uh huh? */
0d528d85 80 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 81 return 0;
e2ebc74d 82
2d56577b 83 sband = local->hw.wiphy->bands[info->band];
0d528d85 84 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 85
e6a9854b 86 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 87
88 /*
89 * data and mgmt (except PS Poll):
90 * - during CFP: 32768
91 * - during contention period:
92 * if addr1 is group address: 0
93 * if more fragments = 0 and addr1 is individual address: time to
94 * transmit one ACK plus SIFS
95 * if more fragments = 1 and addr1 is individual address: time to
96 * transmit next fragment plus 2 x ACK plus 3 x SIFS
97 *
98 * IEEE 802.11, 9.6:
99 * - control response frame (CTS or ACK) shall be transmitted using the
100 * same rate as the immediately previous frame in the frame exchange
101 * sequence, if this rate belongs to the PHY mandatory rates, or else
102 * at the highest possible rate belonging to the PHY rates in the
103 * BSSBasicRateSet
104 */
252b86c4 105 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 106 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 107 /* TODO: These control frames are not currently sent by
ccd7b362 108 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 109 * needs to be updated to support duration field calculation.
110 *
111 * RTS: time needed to transmit pending data/mgmt frame plus
112 * one CTS frame plus one ACK frame plus 3 x SIFS
113 * CTS: duration of immediately previous RTS minus time
114 * required to transmit CTS and its SIFS
115 * ACK: 0 if immediately previous directed data/mgmt had
116 * more=0, with more=1 duration in ACK frame is duration
117 * from previous frame minus time needed to transmit ACK
118 * and its SIFS
119 * PS Poll: BIT(15) | BIT(14) | aid
120 */
121 return 0;
122 }
123
124 /* data/mgmt */
125 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 126 return cpu_to_le16(32768);
e2ebc74d
JB		 127
128 if (group_addr) /* Group address as the destination - no ACK */
129 return 0;
130
131 /* Individual destination address:
132 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
133 * CTS and ACK frames shall be transmitted using the highest rate in
134 * basic rate set that is less than or equal to the rate of the
135 * immediately previous frame and that is using the same modulation
136 * (CCK or OFDM). If no basic rate set matches with these requirements,
137 * the highest mandatory rate of the PHY that is less than or equal to
138 * the rate of the previous frame is used.
139 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
140 */
141 rate = -1;
8318d78a
JB		 142 /* use lowest available if everything fails */
143 mrate = sband->bitrates[0].bitrate;
144 for (i = 0; i < sband->n_bitrates; i++) {
145 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 146
8318d78a
JB		 147 if (r->bitrate > txrate->bitrate)
148 break;
e2ebc74d 149
2103dec1
SW		 150 if ((rate_flags & r->flags) != rate_flags)
151 continue;
152
bda3933a 153 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2103dec1 154 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
8318d78a
JB		 155
156 switch (sband->band) {
57fbcce3 157 case NL80211_BAND_2GHZ: {
8318d78a
JB		 158 u32 flag;
159 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
160 flag = IEEE80211_RATE_MANDATORY_G;
161 else
162 flag = IEEE80211_RATE_MANDATORY_B;
163 if (r->flags & flag)
164 mrate = r->bitrate;
165 break;
166 }
57fbcce3 167 case NL80211_BAND_5GHZ:
8318d78a
JB		 168 if (r->flags & IEEE80211_RATE_MANDATORY_A)
169 mrate = r->bitrate;
170 break;
57fbcce3 171 case NL80211_BAND_60GHZ:
3a0c52a6 172 /* TODO, for now fall through */
57fbcce3 173 case NUM_NL80211_BANDS:
8318d78a
JB		 174 WARN_ON(1);
175 break;
176 }
e2ebc74d
JB		 177 }
178 if (rate == -1) {
179 /* No matching basic rate found; use highest suitable mandatory
180 * PHY rate */
2103dec1 181 rate = DIV_ROUND_UP(mrate, 1 << shift);
e2ebc74d
JB		 182 }
183
6674f210
SW		 184 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
185 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 186 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 187 dur = 0;
188 else
189 /* Time needed to transmit ACK
190 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
191 * to closest integer */
4ee73f33 192 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
438b61b7
SW		 193 tx->sdata->vif.bss_conf.use_short_preamble,
194 shift);
e2ebc74d
JB		 195
196 if (next_frag_len) {
197 /* Frame is fragmented: duration increases with time needed to
198 * transmit next fragment plus ACK and 2 x SIFS. */
199 dur *= 2; /* ACK + SIFS */
200 /* next fragment */
4ee73f33 201 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 202 txrate->bitrate, erp,
438b61b7
SW		 203 tx->sdata->vif.bss_conf.use_short_preamble,
204 shift);
e2ebc74d
JB		 205 }
206
03f93c3d 207 return cpu_to_le16(dur);
e2ebc74d
JB		 208}
209
e2ebc74d 210/* tx handlers */
5c1b98a5
KV		 211static ieee80211_tx_result debug_noinline
212ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
213{
214 struct ieee80211_local *local = tx->local;
0c74211d 215 struct ieee80211_if_managed *ifmgd;
5c1b98a5
KV		 216
217 /* driver doesn't support power save */
30686bf7 218 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
5c1b98a5
KV		 219 return TX_CONTINUE;
220
221 /* hardware does dynamic power save */
30686bf7 222 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
5c1b98a5
KV		 223 return TX_CONTINUE;
224
225 /* dynamic power save disabled */
226 if (local->hw.conf.dynamic_ps_timeout <= 0)
227 return TX_CONTINUE;
228
229 /* we are scanning, don't enable power save */
230 if (local->scanning)
231 return TX_CONTINUE;
232
233 if (!local->ps_sdata)
234 return TX_CONTINUE;
235
236 /* No point if we're going to suspend */
237 if (local->quiescing)
238 return TX_CONTINUE;
239
0c74211d
KV		 240 /* dynamic ps is supported only in managed mode */
241 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
242 return TX_CONTINUE;
243
244 ifmgd = &tx->sdata->u.mgd;
245
246 /*
247 * Don't wakeup from power save if u-apsd is enabled, voip ac has
248 * u-apsd enabled and the frame is in voip class. This effectively
249 * means that even if all access categories have u-apsd enabled, in
250 * practise u-apsd is only used with the voip ac. This is a
251 * workaround for the case when received voip class packets do not
252 * have correct qos tag for some reason, due the network or the
253 * peer application.
254 *
dc41e4d4 255 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 256 * changed via debugfs, user needs to reassociate manually to have
257 * everything in sync.
258 */
4875d30d
JB		 259 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
260 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
261 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 262 return TX_CONTINUE;
263
5c1b98a5
KV		 264 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
265 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 266 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 267 IEEE80211_QUEUE_STOP_REASON_PS,
268 false);
db28569a 269 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 270 ieee80211_queue_work(&local->hw,
271 &local->dynamic_ps_disable_work);
272 }
273
5db1c07c
LC		 274 /* Don't restart the timer if we're not disassociated */
275 if (!ifmgd->associated)
276 return TX_CONTINUE;
277
5c1b98a5
KV		 278 mod_timer(&local->dynamic_ps_timer, jiffies +
279 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
280
281 return TX_CONTINUE;
282}
e2ebc74d 283
d9e8a70f 284static ieee80211_tx_result debug_noinline
5cf121c3 285ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 286{
358c8d9d 287
e039fa4a 288 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 289 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 290 bool assoc = false;
e2ebc74d 291
e039fa4a 292 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 293 return TX_CONTINUE;
58d4185e 294
b23b025f
BG		 295 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
296 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 297 !ieee80211_is_probe_req(hdr->frame_control) &&
298 !ieee80211_is_nullfunc(hdr->frame_control))
299 /*
300 * When software scanning only nullfunc frames (to notify
301 * the sleep state to the AP) and probe requests (for the
302 * active scan) are allowed, all other frames should not be
303 * sent and we should not get here, but if we do
304 * nonetheless, drop them to avoid sending them
305 * off-channel. See the link below and
306 * ieee80211_start_scan() for more.
307 *
308 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
309 */
9ae54c84 310 return TX_DROP;
e2ebc74d 311
239281f8
RL		 312 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
313 return TX_CONTINUE;
314
1be7fe8d
BJ		 315 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
316 return TX_CONTINUE;
317
5cf121c3 318 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 319 return TX_CONTINUE;
e2ebc74d 320
c2c98fde
JB		 321 if (tx->sta)
322 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 323
5cf121c3 324 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 325 if (unlikely(!assoc &&
358c8d9d 326 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 327#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 328 sdata_info(tx->sdata,
329 "dropped data frame to not associated station %pM\n",
330 hdr->addr1);
331#endif
e2ebc74d 332 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 333 return TX_DROP;
e2ebc74d 334 }
72f15d53
MB		 335 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
336 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
29623892
JB		 337 /*
338 * No associated STAs - no need to send multicast
339 * frames.
340 */
341 return TX_DROP;
e2ebc74d
JB		 342 }
343
9ae54c84 344 return TX_CONTINUE;
e2ebc74d
JB		 345}
346
e2ebc74d
JB		 347/* 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
79010420 358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
d012a605 365 else
e2ebc74d 366 continue;
d012a605
MP		 367
368 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 369 if (skb) {
370 purged++;
6b07d9ca 371 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 372 }
d012a605 373 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 374 }
e2ebc74d 375
948d887d
JB		 376 /*
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
379 */
d0709a65 380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 381 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++;
c3e7724b 388 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 389 break;
390 }
e2ebc74d 391 }
e2ebc74d 392 }
d0709a65 393
e2ebc74d 394 local->total_ps_buffered = total;
bdcbd8e0 395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 396}
397
9ae54c84 398static ieee80211_tx_result
5cf121c3 399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 400{
e039fa4a 401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 403 struct ps_data *ps;
e039fa4a 404
7d54d0dd
JB		 405 /*
406 * broadcast/multicast frame
407 *
3f52b7e3 408 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
411 */
412
3f52b7e3 413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 414 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;
3f52b7e3
MP		 420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
d012a605 422 } else {
3e122be0 423 return TX_CONTINUE;
d012a605
MP		 424 }
425
3e122be0
JB		 426
427 /* no buffering for ordered frames */
358c8d9d 428 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 429 return TX_CONTINUE;
7d54d0dd 430
08b99399
JB		 431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
30686bf7 434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 435 info->hw_queue = tx->sdata->vif.cab_queue;
436
7d54d0dd 437 /* no stations in PS mode */
d012a605 438 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 439 return TX_CONTINUE;
7d54d0dd 440
62b517cb 441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 442
62b517cb 443 /* device releases frame after DTIM beacon */
30686bf7 444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 445 return TX_CONTINUE;
62b1208e 446
7d54d0dd 447 /* buffered in mac80211 */
62b1208e
JB		 448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
450
d012a605 451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 454 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 455 } else
456 tx->local->total_ps_buffered++;
e2ebc74d 457
d012a605 458 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 459
62b1208e 460 return TX_QUEUED;
e2ebc74d
JB		 461}
462
fb733336
JM		 463static 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
c2c98fde 469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 470 return 0;
471
d8ca16db 472 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 473 return 0;
474
475 return 1;
476}
477
9ae54c84 478static ieee80211_tx_result
5cf121c3 479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 480{
481 struct sta_info *sta = tx->sta;
e039fa4a 482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 484 struct ieee80211_local *local = tx->local;
e2ebc74d 485
02f2f1a9 486 if (unlikely(!sta))
9ae54c84 487 return TX_CONTINUE;
e2ebc74d 488
c2c98fde 489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 493 int ac = skb_get_queue_mapping(tx->skb);
494
08b99399
JB		 495 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
bdcbd8e0
JB		 501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 505
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) &&
5ac2e350
JB		 514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
948d887d
JB		 520 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]);
bdcbd8e0
JB		 522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
c3e7724b 525 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 526 } else
527 tx->local->total_ps_buffered++;
004c872e 528
e039fa4a 529 info->control.jiffies = jiffies;
5061b0c2 530 info->control.vif = &tx->sdata->vif;
8f77f384 531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 534 spin_unlock(&sta->ps_lock);
3393a608
JO		 535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
c868cb35
JB		 541 /*
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
9ae54c84 547 return TX_QUEUED;
bdcbd8e0
JB		 548 } 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);
e2ebc74d 552 }
e2ebc74d 553
9ae54c84 554 return TX_CONTINUE;
e2ebc74d
JB		 555}
556
d9e8a70f 557static ieee80211_tx_result debug_noinline
5cf121c3 558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 559{
5cf121c3 560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 561 return TX_CONTINUE;
e2ebc74d 562
5cf121c3 563 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
a621fa4d
JB		 569static ieee80211_tx_result debug_noinline
570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
af61a165
JB		 574 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;
9c1c98a3 578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 579 }
a621fa4d
JB		 580
581 return TX_CONTINUE;
582}
583
d9e8a70f 584static ieee80211_tx_result debug_noinline
5cf121c3 585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 586{
46e6de15 587 struct ieee80211_key *key;
e039fa4a 588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 590
3b8d81e0 591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 592 tx->key = NULL;
2475b1cc
MS		 593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 595 tx->key = key;
46f6b060
MH		 596 else if (ieee80211_is_group_privacy_action(tx->skb) &&
597 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 tx->key = key;
3cfcf6ac 599 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 600 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 601 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 602 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 tx->key = key;
f7e0104c
JB		 604 else if (is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 tx->key = key;
607 else if (!is_multicast_ether_addr(hdr->addr1) &&
608 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 609 tx->key = key;
e8f4fb7c 610 else
4922f71f 611 tx->key = NULL;
e2ebc74d
JB		 612
613 if (tx->key) {
813d7669
JB		 614 bool skip_hw = false;
615
011bfcc4 616 /* TODO: add threshold stuff again */
176e4f84 617
97359d12
JB		 618 switch (tx->key->conf.cipher) {
619 case WLAN_CIPHER_SUITE_WEP40:
620 case WLAN_CIPHER_SUITE_WEP104:
97359d12 621 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 622 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 623 tx->key = NULL;
624 break;
97359d12 625 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 626 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 627 case WLAN_CIPHER_SUITE_GCMP:
628 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 629 if (!ieee80211_is_data_present(hdr->frame_control) &&
630 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 631 tx->skb) &&
632 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 633 tx->key = NULL;
3b43a187
KV		 634 else
635 skip_hw = (tx->key->conf.flags &
e548c49e 636 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 637 ieee80211_is_mgmt(hdr->frame_control);
fb733336 638 break;
97359d12 639 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 640 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 641 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 643 if (!ieee80211_is_mgmt(hdr->frame_control))
644 tx->key = NULL;
645 break;
176e4f84 646 }
813d7669 647
e54faf29
JB		 648 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
649 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 650 return TX_DROP;
651
f12553eb 652 if (!skip_hw && tx->key &&
382b1655 653 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 654 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 655 }
656
9ae54c84 657 return TX_CONTINUE;
e2ebc74d
JB		 658}
659
d9e8a70f 660static ieee80211_tx_result debug_noinline
5cf121c3 661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 662{
e039fa4a 663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
a2c40249 666 u32 len;
e6a9854b 667 struct ieee80211_tx_rate_control txrc;
0d528d85 668 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 669 bool assoc = false;
8318d78a 670
e6a9854b 671 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 672
2d56577b 673 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 674
a2c40249 675 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 676 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 677
678 /* set up the tx rate control struct we give the RC algo */
005e472b 679 txrc.hw = &tx->local->hw;
e6a9854b
JB		 680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
2d56577b 684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
2ffbe6d3
FF		 685
686 if (tx->sdata->rc_has_mcs_mask[info->band])
687 txrc.rate_idx_mcs_mask =
688 tx->sdata->rc_rateidx_mcs_mask[info->band];
689
8f0729b1 690 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 691 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 692 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
693 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 694
695 /* set up RTS protection if desired */
b9a5f8ca 696 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 697 txrc.rts = true;
e2ebc74d 698 }
e2ebc74d 699
0d528d85 700 info->control.use_rts = txrc.rts;
991fec09
FF		 701 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
702
e6a9854b
JB		 703 /*
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) ||
c2c98fde 711 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 712 txrc.short_preamble = true;
713
714 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 715
dfdfc2be
SE		 716 /* don't ask rate control when rate already injected via radiotap */
717 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
718 return TX_CONTINUE;
719
c2c98fde
JB		 720 if (tx->sta)
721 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 722
723 /*
724 * Lets not bother rate control if we're associated and cannot
725 * talk to the sta. This should not happen.
726 */
c2c98fde 727 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 728 !rate_usable_index_exists(sband, &tx->sta->sta),
729 "%s: Dropped data frame as no usable bitrate found while "
730 "scanning and associated. Target station: "
731 "%pM on %d GHz band\n",
47846c9b 732 tx->sdata->name, hdr->addr1,
2d56577b 733 info->band ? 5 : 2))
b770b43e 734 return TX_DROP;
2e92e6f2 735
b770b43e
LR		 736 /*
737 * If we're associated with the sta at this point we know we can at
738 * least send the frame at the lowest bit rate.
739 */
e6a9854b
JB		 740 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
741
0d528d85
FF		 742 if (tx->sta && !info->control.skip_table)
743 ratetbl = rcu_dereference(tx->sta->sta.rates);
744
745 if (unlikely(info->control.rates[0].idx < 0)) {
746 if (ratetbl) {
747 struct ieee80211_tx_rate rate = {
748 .idx = ratetbl->rate[0].idx,
749 .flags = ratetbl->rate[0].flags,
750 .count = ratetbl->rate[0].count
751 };
752
753 if (ratetbl->rate[0].idx < 0)
754 return TX_DROP;
755
756 tx->rate = rate;
757 } else {
758 return TX_DROP;
759 }
760 } else {
761 tx->rate = info->control.rates[0];
762 }
e6a9854b 763
c1ce5a74 764 if (txrc.reported_rate.idx < 0) {
0d528d85 765 txrc.reported_rate = tx->rate;
c1ce5a74 766 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 767 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 768 } else if (tx->sta)
e5a9f8d0 769 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 770
0d528d85
FF		 771 if (ratetbl)
772 return TX_CONTINUE;
773
e6a9854b
JB		 774 if (unlikely(!info->control.rates[0].count))
775 info->control.rates[0].count = 1;
e2ebc74d 776
9955151d
GS		 777 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
778 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
779 info->control.rates[0].count = 1;
780
e6a9854b
JB		 781 return TX_CONTINUE;
782}
783
ba8c3d6f
FF		 784static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
785{
786 u16 *seq = &sta->tid_seq[tid];
787 __le16 ret = cpu_to_le16(*seq);
788
789 /* Increase the sequence number. */
790 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
791
792 return ret;
793}
794
f591fa5d
JB		 795static ieee80211_tx_result debug_noinline
796ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
797{
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 800 u8 *qc;
801 int tid;
802
25d834e1
JB		 803 /*
804 * Packet injection may want to control the sequence
805 * number, if we have no matching interface then we
806 * neither assign one ourselves nor ask the driver to.
807 */
5061b0c2 808 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 809 return TX_CONTINUE;
810
f591fa5d
JB		 811 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
812 return TX_CONTINUE;
813
814 if (ieee80211_hdrlen(hdr->frame_control) < 24)
815 return TX_CONTINUE;
816
49a59543
JB		 817 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
818 return TX_CONTINUE;
819
94778280
JB		 820 /*
821 * Anything but QoS data that has a sequence number field
822 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 823 * counter. QoS data frames with a multicast destination
824 * also use the global counter (802.11-2012 9.3.2.10).
94778280 825 */
c4c205f3
BC		 826 if (!ieee80211_is_data_qos(hdr->frame_control) ||
827 is_multicast_ether_addr(hdr->addr1)) {
94778280 828 /* driver should assign sequence number */
f591fa5d 829 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 830 /* for pure STA mode without beacons, we can do it */
831 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
832 tx->sdata->sequence_number += 0x10;
79c892b8 833 if (tx->sta)
e5a9f8d0 834 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 835 return TX_CONTINUE;
836 }
837
838 /*
839 * This should be true for injected/management frames only, for
840 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
841 * above since they are not QoS-data frames.
842 */
843 if (!tx->sta)
844 return TX_CONTINUE;
845
846 /* include per-STA, per-TID sequence counter */
847
848 qc = ieee80211_get_qos_ctl(hdr);
849 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
e5a9f8d0 850 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 851
bb42f2d1 852 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 853
854 return TX_CONTINUE;
855}
856
252b86c4 857static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 858 struct sk_buff *skb, int hdrlen,
859 int frag_threshold)
860{
252b86c4 861 struct ieee80211_local *local = tx->local;
a1a3fcec 862 struct ieee80211_tx_info *info;
252b86c4 863 struct sk_buff *tmp;
2de8e0d9
JB		 864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
867
868 if (WARN_ON(rem < 0))
869 return -EINVAL;
870
252b86c4
JB		 871 /* first fragment was already added to queue by caller */
872
2de8e0d9
JB		 873 while (rem) {
874 int fraglen = per_fragm;
875
876 if (fraglen > rem)
877 fraglen = rem;
878 rem -= fraglen;
879 tmp = dev_alloc_skb(local->tx_headroom +
880 frag_threshold +
2475b1cc 881 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 882 IEEE80211_ENCRYPT_TAILROOM);
883 if (!tmp)
884 return -ENOMEM;
252b86c4
JB		 885
886 __skb_queue_tail(&tx->skbs, tmp);
887
2475b1cc
MS		 888 skb_reserve(tmp,
889 local->tx_headroom + tx->sdata->encrypt_headroom);
890
2de8e0d9
JB		 891 /* copy control information */
892 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 893
894 info = IEEE80211_SKB_CB(tmp);
895 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
896 IEEE80211_TX_CTL_FIRST_FRAGMENT);
897
898 if (rem)
899 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
900
2de8e0d9
JB		 901 skb_copy_queue_mapping(tmp, skb);
902 tmp->priority = skb->priority;
2de8e0d9 903 tmp->dev = skb->dev;
2de8e0d9
JB		 904
905 /* copy header and data */
906 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
907 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
908
909 pos += fraglen;
910 }
911
252b86c4 912 /* adjust first fragment's length */
338f977f 913 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 914 return 0;
915}
916
d9e8a70f 917static ieee80211_tx_result debug_noinline
e2454948
JB		 918ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
919{
2de8e0d9
JB		 920 struct sk_buff *skb = tx->skb;
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 923 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 924 int hdrlen;
925 int fragnum;
e2454948 926
252b86c4
JB		 927 /* no matter what happens, tx->skb moves to tx->skbs */
928 __skb_queue_tail(&tx->skbs, skb);
929 tx->skb = NULL;
930
a26eb27a
JB		 931 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
932 return TX_CONTINUE;
933
f3fe4e93 934 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
e2454948
JB		 935 return TX_CONTINUE;
936
eefce91a
JB		 937 /*
938 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 939 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 940 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 941 */
8b30b1fe 942 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 943 return TX_DROP;
944
065e9605 945 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 946
a26eb27a 947 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 948 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 949 return TX_DROP;
e6a9854b 950
2de8e0d9
JB		 951 /*
952 * Now fragment the frame. This will allocate all the fragments and
953 * chain them (using skb as the first fragment) to skb->next.
954 * During transmission, we will remove the successfully transmitted
955 * fragments from this list. When the low-level driver rejects one
956 * of the fragments then we will simply pretend to accept the skb
957 * but store it away as pending.
958 */
252b86c4 959 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 960 return TX_DROP;
e6a9854b 961
2de8e0d9
JB		 962 /* update duration/seq/flags of fragments */
963 fragnum = 0;
252b86c4
JB		 964
965 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 966 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 967
2de8e0d9
JB		 968 hdr = (void *)skb->data;
969 info = IEEE80211_SKB_CB(skb);
e6a9854b 970
252b86c4 971 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 972 hdr->frame_control |= morefrags;
e6a9854b
JB		 973 /*
974 * No multi-rate retries for fragmented frames, that
975 * would completely throw off the NAV at other STAs.
976 */
977 info->control.rates[1].idx = -1;
978 info->control.rates[2].idx = -1;
979 info->control.rates[3].idx = -1;
e3e1a0bc 980 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 981 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 982 } else {
983 hdr->frame_control &= ~morefrags;
e6a9854b 984 }
2de8e0d9
JB		 985 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
986 fragnum++;
252b86c4 987 }
e2ebc74d 988
9ae54c84 989 return TX_CONTINUE;
e2ebc74d
JB		 990}
991
feff1f2f
JB		 992static ieee80211_tx_result debug_noinline
993ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
994{
252b86c4 995 struct sk_buff *skb;
560d2682 996 int ac = -1;
feff1f2f
JB		 997
998 if (!tx->sta)
999 return TX_CONTINUE;
1000
252b86c4 1001 skb_queue_walk(&tx->skbs, skb) {
560d2682 1002 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1003 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1004 }
560d2682 1005 if (ac >= 0)
e5a9f8d0 1006 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1007
1008 return TX_CONTINUE;
1009}
1010
d9e8a70f 1011static ieee80211_tx_result debug_noinline
e2454948
JB		 1012ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1013{
1014 if (!tx->key)
1015 return TX_CONTINUE;
1016
97359d12
JB		 1017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1020 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1021 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1022 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1023 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_MIC_LEN);
1026 case WLAN_CIPHER_SUITE_CCMP_256:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1029 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1030 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1031 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1032 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1033 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1034 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1035 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1036 case WLAN_CIPHER_SUITE_GCMP:
1037 case WLAN_CIPHER_SUITE_GCMP_256:
1038 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1039 default:
d32a1028 1040 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1041 }
1042
e2454948
JB		 1043 return TX_DROP;
1044}
1045
d9e8a70f 1046static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1047ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1048{
252b86c4 1049 struct sk_buff *skb;
2de8e0d9
JB		 1050 struct ieee80211_hdr *hdr;
1051 int next_len;
1052 bool group_addr;
03f93c3d 1053
252b86c4 1054 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1055 hdr = (void *) skb->data;
7e0aae47
JM		 1056 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1057 break; /* must not overwrite AID */
252b86c4
JB		 1058 if (!skb_queue_is_last(&tx->skbs, skb)) {
1059 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1060 next_len = next->len;
1061 } else
1062 next_len = 0;
2de8e0d9 1063 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1064
2de8e0d9 1065 hdr->duration_id =
252b86c4
JB		 1066 ieee80211_duration(tx, skb, group_addr, next_len);
1067 }
03f93c3d
JB		 1068
1069 return TX_CONTINUE;
1070}
1071
e2ebc74d
JB		 1072/* actual transmit path */
1073
a622ab72
JB		 1074static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1075 struct sk_buff *skb,
1076 struct ieee80211_tx_info *info,
1077 struct tid_ampdu_tx *tid_tx,
1078 int tid)
1079{
1080 bool queued = false;
285fa695 1081 bool reset_agg_timer = false;
aa454580 1082 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1083
1084 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1085 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1086 reset_agg_timer = true;
0ab33703
JB		 1087 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1088 /*
1089 * nothing -- this aggregation session is being started
1090 * but that might still fail with the driver
1091 */
ba8c3d6f 1092 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1093 spin_lock(&tx->sta->lock);
1094 /*
1095 * Need to re-check now, because we may get here
1096 *
1097 * 1) in the window during which the setup is actually
1098 * already done, but not marked yet because not all
1099 * packets are spliced over to the driver pending
1100 * queue yet -- if this happened we acquire the lock
1101 * either before or after the splice happens, but
1102 * need to recheck which of these cases happened.
1103 *
1104 * 2) during session teardown, if the OPERATIONAL bit
1105 * was cleared due to the teardown but the pointer
1106 * hasn't been assigned NULL yet (or we loaded it
1107 * before it was assigned) -- in this case it may
1108 * now be NULL which means we should just let the
1109 * packet pass through because splicing the frames
1110 * back is already done.
1111 */
40b275b6 1112 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1113
1114 if (!tid_tx) {
1115 /* do nothing, let packet pass through */
1116 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1117 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1118 reset_agg_timer = true;
a622ab72
JB		 1119 } else {
1120 queued = true;
f6d4671a
EG		 1121 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1122 clear_sta_flag(tx->sta, WLAN_STA_SP);
1123 ps_dbg(tx->sta->sdata,
1124 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1125 tx->sta->sta.addr, tx->sta->sta.aid);
1126 }
a622ab72
JB		 1127 info->control.vif = &tx->sdata->vif;
1128 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1129 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1130 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1131 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1132 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1133 }
1134 spin_unlock(&tx->sta->lock);
aa454580
HS		 1135
1136 if (purge_skb)
c3e7724b 1137 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1138 }
1139
285fa695
NM		 1140 /* reset session timer */
1141 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1142 tid_tx->last_tx = jiffies;
285fa695 1143
a622ab72
JB		 1144 return queued;
1145}
1146
58d4185e
JB		 1147/*
1148 * initialises @tx
7c10770f
JB		 1149 * pass %NULL for the station if unknown, a valid pointer if known
1150 * or an ERR_PTR() if the station is known not to exist
58d4185e 1151 */
9ae54c84 1152static ieee80211_tx_result
3b8d81e0
JB		 1153ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_tx_data *tx,
7c10770f 1155 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1156{
3b8d81e0 1157 struct ieee80211_local *local = sdata->local;
58d4185e 1158 struct ieee80211_hdr *hdr;
e039fa4a 1159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1160 int tid;
a622ab72 1161 u8 *qc;
e2ebc74d
JB		 1162
1163 memset(tx, 0, sizeof(*tx));
1164 tx->skb = skb;
e2ebc74d 1165 tx->local = local;
3b8d81e0 1166 tx->sdata = sdata;
252b86c4 1167 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1168
cd8ffc80
JB		 1169 /*
1170 * If this flag is set to true anywhere, and we get here,
1171 * we are doing the needed processing, so remove the flag
1172 * now.
1173 */
1174 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1175
58d4185e
JB		 1176 hdr = (struct ieee80211_hdr *) skb->data;
1177
7c10770f
JB		 1178 if (likely(sta)) {
1179 if (!IS_ERR(sta))
1180 tx->sta = sta;
1181 } else {
1182 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1183 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1184 if (!tx->sta && sdata->wdev.use_4addr)
1185 return TX_DROP;
1186 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1187 IEEE80211_TX_CTL_INJECTED) ||
1188 tx->sdata->control_port_protocol == tx->skb->protocol) {
1189 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1190 }
1191 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1192 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1193 }
58d4185e 1194
cd8ffc80 1195 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1196 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1197 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1198 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1199 struct tid_ampdu_tx *tid_tx;
1200
8b30b1fe
S		 1201 qc = ieee80211_get_qos_ctl(hdr);
1202 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1203
a622ab72
JB		 1204 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1205 if (tid_tx) {
1206 bool queued;
cd8ffc80 1207
a622ab72
JB		 1208 queued = ieee80211_tx_prep_agg(tx, skb, info,
1209 tid_tx, tid);
1210
1211 if (unlikely(queued))
1212 return TX_QUEUED;
1213 }
8b30b1fe
S		 1214 }
1215
badffb72 1216 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1217 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1218 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1219 } else
5cf121c3 1220 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1221
a26eb27a
JB		 1222 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1223 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1224 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1225 info->flags & IEEE80211_TX_CTL_AMPDU)
1226 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1227 }
1228
e2ebc74d 1229 if (!tx->sta)
e039fa4a 1230 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1231 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1232 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1233 ieee80211_check_fast_xmit(tx->sta);
1234 }
58d4185e 1235
e039fa4a 1236 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1237
9ae54c84 1238 return TX_CONTINUE;
e2ebc74d
JB		 1239}
1240
80a83cfc
MK		 1241static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1242 struct ieee80211_vif *vif,
dbef5362 1243 struct sta_info *sta,
80a83cfc 1244 struct sk_buff *skb)
ba8c3d6f
FF		 1245{
1246 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1247 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1248 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1249
c3732a7b
FF		 1250 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1251 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1252 return NULL;
ba8c3d6f
FF		 1253
1254 if (!ieee80211_is_data(hdr->frame_control))
80a83cfc 1255 return NULL;
ba8c3d6f 1256
dbef5362 1257 if (sta) {
ba8c3d6f
FF		 1258 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1259
dbef5362
MK		 1260 if (!sta->uploaded)
1261 return NULL;
1262
1263 txq = sta->sta.txq[tid];
ba8c3d6f
FF		 1264 } else if (vif) {
1265 txq = vif->txq;
1266 }
1267
1268 if (!txq)
80a83cfc 1269 return NULL;
ba8c3d6f 1270
80a83cfc
MK		 1271 return to_txq_info(txq);
1272}
ba8c3d6f 1273
5caa328e
MK		 1274static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1275{
1276 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1277}
1278
1279static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1280{
1281 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
1282}
1283
1284static u32 codel_skb_len_func(const struct sk_buff *skb)
1285{
1286 return skb->len;
1287}
1288
1289static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1290{
1291 const struct ieee80211_tx_info *info;
1292
1293 info = (const struct ieee80211_tx_info *)skb->cb;
1294 return info->control.enqueue_time;
1295}
1296
1297static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1298 void *ctx)
1299{
1300 struct ieee80211_local *local;
1301 struct txq_info *txqi;
1302 struct fq *fq;
1303 struct fq_flow *flow;
1304
1305 txqi = ctx;
1306 local = vif_to_sdata(txqi->txq.vif)->local;
1307 fq = &local->fq;
1308
1309 if (cvars == &txqi->def_cvars)
1310 flow = &txqi->def_flow;
1311 else
1312 flow = &fq->flows[cvars - local->cvars];
1313
1314 return fq_flow_dequeue(fq, flow);
1315}
1316
1317static void codel_drop_func(struct sk_buff *skb,
1318 void *ctx)
1319{
1320 struct ieee80211_local *local;
1321 struct ieee80211_hw *hw;
1322 struct txq_info *txqi;
1323
1324 txqi = ctx;
1325 local = vif_to_sdata(txqi->txq.vif)->local;
1326 hw = &local->hw;
1327
1328 ieee80211_free_txskb(hw, skb);
1329}
1330
fa962b92
MK		 1331static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1332 struct fq_tin *tin,
1333 struct fq_flow *flow)
1334{
5caa328e
MK		 1335 struct ieee80211_local *local;
1336 struct txq_info *txqi;
1337 struct codel_vars *cvars;
1338 struct codel_params *cparams;
1339 struct codel_stats *cstats;
1340
1341 local = container_of(fq, struct ieee80211_local, fq);
1342 txqi = container_of(tin, struct txq_info, tin);
1343 cparams = &local->cparams;
8d51dbb8 1344 cstats = &txqi->cstats;
5caa328e
MK		 1345
1346 if (flow == &txqi->def_flow)
1347 cvars = &txqi->def_cvars;
1348 else
1349 cvars = &local->cvars[flow - fq->flows];
1350
1351 return codel_dequeue(txqi,
1352 &flow->backlog,
1353 cparams,
1354 cvars,
1355 cstats,
1356 codel_skb_len_func,
1357 codel_skb_time_func,
1358 codel_drop_func,
1359 codel_dequeue_func);
fa962b92
MK		 1360}
1361
1362static void fq_skb_free_func(struct fq *fq,
1363 struct fq_tin *tin,
1364 struct fq_flow *flow,
1365 struct sk_buff *skb)
1366{
1367 struct ieee80211_local *local;
1368
1369 local = container_of(fq, struct ieee80211_local, fq);
1370 ieee80211_free_txskb(&local->hw, skb);
1371}
1372
1373static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1374 struct fq_tin *tin,
1375 int idx,
1376 struct sk_buff *skb)
1377{
1378 struct txq_info *txqi;
1379
1380 txqi = container_of(tin, struct txq_info, tin);
1381 return &txqi->def_flow;
1382}
1383
80a83cfc
MK		 1384static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1385 struct txq_info *txqi,
1386 struct sk_buff *skb)
1387{
fa962b92
MK		 1388 struct fq *fq = &local->fq;
1389 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1390
5caa328e 1391 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1392 fq_tin_enqueue(fq, tin, skb,
1393 fq_skb_free_func,
1394 fq_flow_get_default_func);
1395}
ba8c3d6f 1396
fa962b92
MK		 1397void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1398 struct sta_info *sta,
1399 struct txq_info *txqi, int tid)
1400{
1401 fq_tin_init(&txqi->tin);
1402 fq_flow_init(&txqi->def_flow);
5caa328e 1403 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1404 codel_stats_init(&txqi->cstats);
bb42f2d1 1405 __skb_queue_head_init(&txqi->frags);
fa962b92
MK		 1406
1407 txqi->txq.vif = &sdata->vif;
1408
1409 if (sta) {
1410 txqi->txq.sta = &sta->sta;
1411 sta->sta.txq[tid] = &txqi->txq;
1412 txqi->txq.tid = tid;
731977e9 1413 txqi->txq.ac = ieee80211_ac_from_tid(tid);
fa962b92
MK		 1414 } else {
1415 sdata->vif.txq = &txqi->txq;
1416 txqi->txq.tid = 0;
1417 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1418 }
fa962b92 1419}
ba8c3d6f 1420
fa962b92
MK		 1421void ieee80211_txq_purge(struct ieee80211_local *local,
1422 struct txq_info *txqi)
1423{
1424 struct fq *fq = &local->fq;
1425 struct fq_tin *tin = &txqi->tin;
1426
1427 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1428 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
fa962b92
MK		 1429}
1430
1431int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1432{
1433 struct fq *fq = &local->fq;
1434 int ret;
5caa328e 1435 int i;
3ff23cd5
THJ		 1436 bool supp_vht = false;
1437 enum nl80211_band band;
fa962b92
MK		 1438
1439 if (!local->ops->wake_tx_queue)
1440 return 0;
1441
1442 ret = fq_init(fq, 4096);
1443 if (ret)
1444 return ret;
1445
3ff23cd5
THJ		 1446 /*
1447 * If the hardware doesn't support VHT, it is safe to limit the maximum
1448 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1449 */
1450 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1451 struct ieee80211_supported_band *sband;
1452
1453 sband = local->hw.wiphy->bands[band];
1454 if (!sband)
1455 continue;
1456
1457 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1458 }
1459
1460 if (!supp_vht)
1461 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1462
5caa328e 1463 codel_params_init(&local->cparams);
5caa328e
MK		 1464 local->cparams.interval = MS2TIME(100);
1465 local->cparams.target = MS2TIME(20);
1466 local->cparams.ecn = true;
1467
1468 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1469 GFP_KERNEL);
1470 if (!local->cvars) {
59a7c828 1471 spin_lock_bh(&fq->lock);
5caa328e 1472 fq_reset(fq, fq_skb_free_func);
59a7c828 1473 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1474 return -ENOMEM;
1475 }
1476
1477 for (i = 0; i < fq->flows_cnt; i++)
1478 codel_vars_init(&local->cvars[i]);
1479
fa962b92
MK		 1480 return 0;
1481}
1482
1483void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1484{
1485 struct fq *fq = &local->fq;
1486
1487 if (!local->ops->wake_tx_queue)
1488 return;
1489
5caa328e
MK		 1490 kfree(local->cvars);
1491 local->cvars = NULL;
1492
59a7c828 1493 spin_lock_bh(&fq->lock);
fa962b92 1494 fq_reset(fq, fq_skb_free_func);
59a7c828 1495 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1496}
1497
bb42f2d1
THJ		 1498static bool ieee80211_queue_skb(struct ieee80211_local *local,
1499 struct ieee80211_sub_if_data *sdata,
1500 struct sta_info *sta,
1501 struct sk_buff *skb)
1502{
bb42f2d1
THJ		 1503 struct fq *fq = &local->fq;
1504 struct ieee80211_vif *vif;
1505 struct txq_info *txqi;
bb42f2d1
THJ		 1506
1507 if (!local->ops->wake_tx_queue ||
1508 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1509 return false;
1510
bb42f2d1
THJ		 1511 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1512 sdata = container_of(sdata->bss,
1513 struct ieee80211_sub_if_data, u.ap);
1514
1515 vif = &sdata->vif;
dbef5362 1516 txqi = ieee80211_get_txq(local, vif, sta, skb);
bb42f2d1
THJ		 1517
1518 if (!txqi)
1519 return false;
1520
bb42f2d1
THJ		 1521 spin_lock_bh(&fq->lock);
1522 ieee80211_txq_enqueue(local, txqi, skb);
1523 spin_unlock_bh(&fq->lock);
1524
1525 drv_wake_tx_queue(local, txqi);
1526
1527 return true;
1528}
1529
11127e91
JB		 1530static bool ieee80211_tx_frags(struct ieee80211_local *local,
1531 struct ieee80211_vif *vif,
1532 struct ieee80211_sta *sta,
1533 struct sk_buff_head *skbs,
1534 bool txpending)
e2ebc74d 1535{
80a83cfc 1536 struct ieee80211_tx_control control = {};
252b86c4 1537 struct sk_buff *skb, *tmp;
3b8d81e0 1538 unsigned long flags;
e2ebc74d 1539
252b86c4 1540 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1541 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1542 int q = info->hw_queue;
1543
1544#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1545 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1546 __skb_unlink(skb, skbs);
c3e7724b 1547 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1548 continue;
1549 }
1550#endif
3b8d81e0
JB		 1551
1552 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1553 if (local->queue_stop_reasons[q] ||
7bb45683 1554 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1555 if (unlikely(info->flags &
a7679ed5
SF		 1556 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1557 if (local->queue_stop_reasons[q] &
1558 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1559 /*
1560 * Drop off-channel frames if queues
1561 * are stopped for any reason other
1562 * than off-channel operation. Never
1563 * queue them.
1564 */
1565 spin_unlock_irqrestore(
1566 &local->queue_stop_reason_lock,
1567 flags);
1568 ieee80211_purge_tx_queue(&local->hw,
1569 skbs);
1570 return true;
1571 }
1572 } else {
1573
6c17b77b 1574 /*
a7679ed5
SF		 1575 * Since queue is stopped, queue up frames for
1576 * later transmission from the tx-pending
1577 * tasklet when the queue is woken again.
6c17b77b 1578 */
a7679ed5
SF		 1579 if (txpending)
1580 skb_queue_splice_init(skbs,
1581 &local->pending[q]);
1582 else
1583 skb_queue_splice_tail_init(skbs,
1584 &local->pending[q]);
1585
1586 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1587 flags);
1588 return false;
6c17b77b 1589 }
7bb45683 1590 }
3b8d81e0 1591 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1592
11127e91 1593 info->control.vif = vif;
80a83cfc 1594 control.sta = sta;
f0e72851 1595
11127e91 1596 __skb_unlink(skb, skbs);
80a83cfc 1597 drv_tx(local, &control, skb);
11127e91 1598 }
5061b0c2 1599
11127e91
JB		 1600 return true;
1601}
1602
1603/*
1604 * Returns false if the frame couldn't be transmitted but was queued instead.
1605 */
1606static bool __ieee80211_tx(struct ieee80211_local *local,
1607 struct sk_buff_head *skbs, int led_len,
1608 struct sta_info *sta, bool txpending)
1609{
1610 struct ieee80211_tx_info *info;
1611 struct ieee80211_sub_if_data *sdata;
1612 struct ieee80211_vif *vif;
1613 struct ieee80211_sta *pubsta;
1614 struct sk_buff *skb;
1615 bool result = true;
1616 __le16 fc;
5061b0c2 1617
11127e91
JB		 1618 if (WARN_ON(skb_queue_empty(skbs)))
1619 return true;
ec25acc4 1620
11127e91
JB		 1621 skb = skb_peek(skbs);
1622 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1623 info = IEEE80211_SKB_CB(skb);
1624 sdata = vif_to_sdata(info->control.vif);
1625 if (sta && !sta->uploaded)
1626 sta = NULL;
1627
1628 if (sta)
1629 pubsta = &sta->sta;
1630 else
1631 pubsta = NULL;
1632
1633 switch (sdata->vif.type) {
1634 case NL80211_IFTYPE_MONITOR:
d8212184 1635 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1636 vif = &sdata->vif;
1637 break;
1638 }
4b6f1dd6 1639 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1640 if (sdata) {
4b6f1dd6 1641 vif = &sdata->vif;
3a25a8c8
JB		 1642 info->hw_queue =
1643 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1644 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1645 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1646 return true;
1647 } else
4b6f1dd6 1648 vif = NULL;
11127e91
JB		 1649 break;
1650 case NL80211_IFTYPE_AP_VLAN:
1651 sdata = container_of(sdata->bss,
1652 struct ieee80211_sub_if_data, u.ap);
1653 /* fall through */
1654 default:
1655 vif = &sdata->vif;
1656 break;
e2ebc74d 1657 }
2de8e0d9 1658
cb831b53
JB		 1659 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1660 txpending);
11127e91 1661
74e4dbfd 1662 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1663
4db4e0a1 1664 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1665
11127e91 1666 return result;
e2ebc74d
JB		 1667}
1668
97b045d6
JB		 1669/*
1670 * Invoke TX handlers, return 0 on success and non-zero if the
1671 * frame was dropped or queued.
bb42f2d1
THJ		 1672 *
1673 * The handlers are split into an early and late part. The latter is everything
1674 * that can be sensitive to reordering, and will be deferred to after packets
1675 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1676 */
bb42f2d1 1677static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1678{
97b045d6 1679 ieee80211_tx_result res = TX_DROP;
97b045d6 1680
9aa4aee3
JB		 1681#define CALL_TXH(txh) \
1682 do { \
1683 res = txh(tx); \
1684 if (res != TX_CONTINUE) \
1685 goto txh_done; \
1686 } while (0)
1687
5c1b98a5 1688 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1689 CALL_TXH(ieee80211_tx_h_check_assoc);
1690 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1691 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1692 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1693 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1694 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1695
bb42f2d1
THJ		 1696 txh_done:
1697 if (unlikely(res == TX_DROP)) {
1698 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1699 if (tx->skb)
1700 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1701 else
1702 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1703 return -1;
1704 } else if (unlikely(res == TX_QUEUED)) {
1705 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1706 return -1;
1707 }
1708
1709 return 0;
1710}
1711
1712/*
1713 * Late handlers can be called while the sta lock is held. Handlers that can
1714 * cause packets to be generated will cause deadlock!
1715 */
1716static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1717{
1718 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1719 ieee80211_tx_result res = TX_CONTINUE;
1720
aa5b5492
JB		 1721 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1722 __skb_queue_tail(&tx->skbs, tx->skb);
1723 tx->skb = NULL;
c6fcf6bc 1724 goto txh_done;
aa5b5492 1725 }
c6fcf6bc
JB		 1726
1727 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1728 CALL_TXH(ieee80211_tx_h_sequence);
1729 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1730 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1731 CALL_TXH(ieee80211_tx_h_stats);
1732 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1733 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1734 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1735#undef CALL_TXH
97b045d6 1736
d9e8a70f 1737 txh_done:
97b045d6 1738 if (unlikely(res == TX_DROP)) {
5479d0e7 1739 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1740 if (tx->skb)
c3e7724b 1741 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1742 else
1f98ab7f 1743 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1744 return -1;
1745 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1746 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1747 return -1;
1748 }
1749
1750 return 0;
1751}
1752
bb42f2d1
THJ		 1753static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1754{
1755 int r = invoke_tx_handlers_early(tx);
1756
1757 if (r)
1758 return r;
1759 return invoke_tx_handlers_late(tx);
1760}
1761
06be6b14
FF		 1762bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1763 struct ieee80211_vif *vif, struct sk_buff *skb,
1764 int band, struct ieee80211_sta **sta)
1765{
1766 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1767 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1768 struct ieee80211_tx_data tx;
88724a81 1769 struct sk_buff *skb2;
06be6b14 1770
7c10770f 1771 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1772 return false;
1773
1774 info->band = band;
1775 info->control.vif = vif;
1776 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1777
1778 if (invoke_tx_handlers(&tx))
1779 return false;
1780
1781 if (sta) {
1782 if (tx.sta)
1783 *sta = &tx.sta->sta;
1784 else
1785 *sta = NULL;
1786 }
1787
88724a81
JB		 1788 /* this function isn't suitable for fragmented data frames */
1789 skb2 = __skb_dequeue(&tx.skbs);
1790 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1791 ieee80211_free_txskb(hw, skb2);
1792 ieee80211_purge_tx_queue(hw, &tx.skbs);
1793 return false;
1794 }
1795
06be6b14
FF		 1796 return true;
1797}
1798EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1799
7bb45683
JB		 1800/*
1801 * Returns false if the frame couldn't be transmitted but was queued instead.
1802 */
1803static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f
JB		 1804 struct sta_info *sta, struct sk_buff *skb,
1805 bool txpending)
e2ebc74d 1806{
3b8d81e0 1807 struct ieee80211_local *local = sdata->local;
5cf121c3 1808 struct ieee80211_tx_data tx;
97b045d6 1809 ieee80211_tx_result res_prepare;
e039fa4a 1810 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1811 bool result = true;
74e4dbfd 1812 int led_len;
e2ebc74d 1813
e2ebc74d
JB		 1814 if (unlikely(skb->len < 10)) {
1815 dev_kfree_skb(skb);
7bb45683 1816 return true;
e2ebc74d
JB		 1817 }
1818
58d4185e 1819 /* initialises tx */
74e4dbfd 1820 led_len = skb->len;
7c10770f 1821 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1822
cd8ffc80 1823 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1824 ieee80211_free_txskb(&local->hw, skb);
55de908a 1825 return true;
cd8ffc80 1826 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1827 return true;
e2ebc74d
JB		 1828 }
1829
3a25a8c8
JB		 1830 /* set up hw_queue value early */
1831 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1832 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1833 info->hw_queue =
1834 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1835
bb42f2d1
THJ		 1836 if (invoke_tx_handlers_early(&tx))
1837 return false;
1838
1839 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1840 return true;
1841
1842 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1843 result = __ieee80211_tx(local, &tx.skbs, led_len,
1844 tx.sta, txpending);
55de908a 1845
7bb45683 1846 return result;
e2ebc74d
JB		 1847}
1848
1849/* device xmit handlers */
1850
3bff1865 1851static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1852 struct sk_buff *skb,
1853 int head_need, bool may_encrypt)
1854{
3bff1865 1855 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1856 int tail_need = 0;
1857
3bff1865 1858 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1859 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1860 tail_need -= skb_tailroom(skb);
1861 tail_need = max_t(int, tail_need, 0);
1862 }
1863
c70f59a2 1864 if (skb_cloned(skb) &&
30686bf7 1865 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1866 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1867 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1868 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1869 else if (head_need || tail_need)
23c0752a 1870 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1871 else
1872 return 0;
23c0752a
JB		 1873
1874 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1875 wiphy_debug(local->hw.wiphy,
1876 "failed to reallocate TX buffer\n");
23c0752a
JB		 1877 return -ENOMEM;
1878 }
1879
23c0752a
JB		 1880 return 0;
1881}
1882
7c10770f
JB		 1883void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1884 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1885{
3b8d81e0 1886 struct ieee80211_local *local = sdata->local;
e039fa4a 1887 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1888 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1889 int headroom;
23c0752a 1890 bool may_encrypt;
e2ebc74d 1891
3b8d81e0 1892 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1893
3b8d81e0 1894 headroom = local->tx_headroom;
23c0752a 1895 if (may_encrypt)
2475b1cc 1896 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1897 headroom -= skb_headroom(skb);
1898 headroom = max_t(int, 0, headroom);
1899
3bff1865 1900 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1901 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1902 return;
e2ebc74d
JB		 1903 }
1904
740c1aa3 1905 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1906 info->control.vif = &sdata->vif;
e2ebc74d 1907
3f52b7e3
MP		 1908 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1909 if (ieee80211_is_data(hdr->frame_control) &&
1910 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1911 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1912 return; /* skb queued: don't free */
1913 } else {
1914 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1915 }
98aed9fd 1916 }
cca89496 1917
2154c81c 1918 ieee80211_set_qos_hdr(sdata, skb);
7c10770f 1919 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 1920}
1921
dfdfc2be
SE		 1922static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1923 struct sk_buff *skb)
73b9f03a
JB		 1924{
1925 struct ieee80211_radiotap_iterator iterator;
1926 struct ieee80211_radiotap_header *rthdr =
1927 (struct ieee80211_radiotap_header *) skb->data;
1928 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1929 struct ieee80211_supported_band *sband =
1930 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1931 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1932 NULL);
1933 u16 txflags;
dfdfc2be
SE		 1934 u16 rate = 0;
1935 bool rate_found = false;
1936 u8 rate_retries = 0;
1937 u16 rate_flags = 0;
f66b60f6 1938 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1939 u16 vht_known;
1940 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1941 int i;
73b9f03a
JB		 1942
1943 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1944 IEEE80211_TX_CTL_DONTFRAG;
1945
1946 /*
1947 * for every radiotap entry that is present
1948 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1949 * entries present, or -EINVAL on error)
1950 */
1951
1952 while (!ret) {
1953 ret = ieee80211_radiotap_iterator_next(&iterator);
1954
1955 if (ret)
1956 continue;
1957
1958 /* see if this argument is something we can use */
1959 switch (iterator.this_arg_index) {
1960 /*
1961 * You must take care when dereferencing iterator.this_arg
1962 * for multibyte types... the pointer is not aligned. Use
1963 * get_unaligned((type *)iterator.this_arg) to dereference
1964 * iterator.this_arg for type "type" safely on all arches.
1965 */
1966 case IEEE80211_RADIOTAP_FLAGS:
1967 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1968 /*
1969 * this indicates that the skb we have been
1970 * handed has the 32-bit FCS CRC at the end...
1971 * we should react to that by snipping it off
1972 * because it will be recomputed and added
1973 * on transmission
1974 */
1975 if (skb->len < (iterator._max_length + FCS_LEN))
1976 return false;
1977
1978 skb_trim(skb, skb->len - FCS_LEN);
1979 }
1980 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1981 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1982 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1983 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1984 break;
1985
1986 case IEEE80211_RADIOTAP_TX_FLAGS:
1987 txflags = get_unaligned_le16(iterator.this_arg);
1988 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1989 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1990 break;
1991
dfdfc2be
SE		 1992 case IEEE80211_RADIOTAP_RATE:
1993 rate = *iterator.this_arg;
1994 rate_flags = 0;
1995 rate_found = true;
1996 break;
1997
1998 case IEEE80211_RADIOTAP_DATA_RETRIES:
1999 rate_retries = *iterator.this_arg;
2000 break;
2001
2002 case IEEE80211_RADIOTAP_MCS:
2003 mcs_known = iterator.this_arg[0];
2004 mcs_flags = iterator.this_arg[1];
2005 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2006 break;
2007
2008 rate_found = true;
2009 rate = iterator.this_arg[2];
2010 rate_flags = IEEE80211_TX_RC_MCS;
2011
2012 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2013 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2014 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2015
f66b60f6 2016 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2017 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2018 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2019 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2020 break;
2021
646e76bb
LB		 2022 case IEEE80211_RADIOTAP_VHT:
2023 vht_known = get_unaligned_le16(iterator.this_arg);
2024 rate_found = true;
2025
2026 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2027 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2028 (iterator.this_arg[2] &
2029 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2030 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2031 if (vht_known &
2032 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2033 if (iterator.this_arg[3] == 1)
2034 rate_flags |=
2035 IEEE80211_TX_RC_40_MHZ_WIDTH;
2036 else if (iterator.this_arg[3] == 4)
2037 rate_flags |=
2038 IEEE80211_TX_RC_80_MHZ_WIDTH;
2039 else if (iterator.this_arg[3] == 11)
2040 rate_flags |=
2041 IEEE80211_TX_RC_160_MHZ_WIDTH;
2042 }
2043
2044 vht_mcs = iterator.this_arg[4] >> 4;
2045 vht_nss = iterator.this_arg[4] & 0xF;
2046 break;
2047
73b9f03a
JB		 2048 /*
2049 * Please update the file
2050 * Documentation/networking/mac80211-injection.txt
2051 * when parsing new fields here.
2052 */
2053
2054 default:
2055 break;
2056 }
2057 }
2058
2059 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2060 return false;
2061
dfdfc2be
SE		 2062 if (rate_found) {
2063 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2064
2065 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2066 info->control.rates[i].idx = -1;
2067 info->control.rates[i].flags = 0;
2068 info->control.rates[i].count = 0;
2069 }
2070
2071 if (rate_flags & IEEE80211_TX_RC_MCS) {
2072 info->control.rates[0].idx = rate;
646e76bb
LB		 2073 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2074 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2075 vht_nss);
dfdfc2be
SE		 2076 } else {
2077 for (i = 0; i < sband->n_bitrates; i++) {
2078 if (rate * 5 != sband->bitrates[i].bitrate)
2079 continue;
2080
2081 info->control.rates[0].idx = i;
2082 break;
2083 }
2084 }
2085
07310a63
FF		 2086 if (info->control.rates[0].idx < 0)
2087 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2088
dfdfc2be
SE		 2089 info->control.rates[0].flags = rate_flags;
2090 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2091 local->hw.max_rate_tries);
2092 }
2093
73b9f03a
JB		 2094 /*
2095 * remove the radiotap header
2096 * iterator->_max_length was sanity-checked against
2097 * skb->len by iterator init
2098 */
2099 skb_pull(skb, iterator._max_length);
2100
2101 return true;
2102}
2103
d0cf9c0d
SH		 2104netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2105 struct net_device *dev)
e2ebc74d
JB		 2106{
2107 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2108 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2109 struct ieee80211_radiotap_header *prthdr =
2110 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2111 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2112 struct ieee80211_hdr *hdr;
5d9cf4a5 2113 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2114 struct cfg80211_chan_def *chandef;
9b8a74e3 2115 u16 len_rthdr;
5d9cf4a5 2116 int hdrlen;
e2ebc74d 2117
9b8a74e3
AG		 2118 /* check for not even having the fixed radiotap header part */
2119 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2120 goto fail; /* too short to be possibly valid */
2121
2122 /* is it a header version we can trust to find length from? */
2123 if (unlikely(prthdr->it_version))
2124 goto fail; /* only version 0 is supported */
2125
2126 /* then there must be a radiotap header with a length we can use */
2127 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2128
2129 /* does the skb contain enough to deliver on the alleged length? */
2130 if (unlikely(skb->len < len_rthdr))
2131 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2132
e2ebc74d
JB		 2133 /*
2134 * fix up the pointers accounting for the radiotap
2135 * header still being in there. We are being given
2136 * a precooked IEEE80211 header so no need for
2137 * normal processing
2138 */
9b8a74e3 2139 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2140 /*
9b8a74e3
AG		 2141 * these are just fixed to the end of the rt area since we
2142 * don't have any better information and at this point, nobody cares
e2ebc74d 2143 */
9b8a74e3
AG		 2144 skb_set_network_header(skb, len_rthdr);
2145 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2146
5d9cf4a5
JB		 2147 if (skb->len < len_rthdr + 2)
2148 goto fail;
2149
2150 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2151 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2152
2153 if (skb->len < len_rthdr + hdrlen)
2154 goto fail;
2155
f75f5c6f
HS		 2156 /*
2157 * Initialize skb->protocol if the injected frame is a data frame
2158 * carrying a rfc1042 header
2159 */
5d9cf4a5
JB		 2160 if (ieee80211_is_data(hdr->frame_control) &&
2161 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2162 u8 *payload = (u8 *)hdr + hdrlen;
2163
b203ca39 2164 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2165 skb->protocol = cpu_to_be16((payload[6] << 8) |
2166 payload[7]);
f75f5c6f
HS		 2167 }
2168
3b8d81e0
JB		 2169 memset(info, 0, sizeof(*info));
2170
5d9cf4a5 2171 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2172 IEEE80211_TX_CTL_INJECTED;
2173
5d9cf4a5
JB		 2174 rcu_read_lock();
2175
2176 /*
2177 * We process outgoing injected frames that have a local address
2178 * we handle as though they are non-injected frames.
2179 * This code here isn't entirely correct, the local MAC address
2180 * isn't always enough to find the interface to use; for proper
2181 * VLAN/WDS support we will need a different mechanism (which
2182 * likely isn't going to be monitor interfaces).
2183 */
2184 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2185
2186 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2187 if (!ieee80211_sdata_running(tmp_sdata))
2188 continue;
2189 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2190 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2191 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2192 continue;
b203ca39 2193 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2194 sdata = tmp_sdata;
2195 break;
2196 }
2197 }
7351c6bd 2198
55de908a
JB		 2199 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2200 if (!chanctx_conf) {
2201 tmp_sdata = rcu_dereference(local->monitor_sdata);
2202 if (tmp_sdata)
2203 chanctx_conf =
2204 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2205 }
55de908a 2206
b4a7ff75 2207 if (chanctx_conf)
b4932836 2208 chandef = &chanctx_conf->def;
b4a7ff75 2209 else if (!local->use_chanctx)
b4932836 2210 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2211 else
2212 goto fail_rcu;
55de908a
JB		 2213
2214 /*
2215 * Frame injection is not allowed if beaconing is not allowed
2216 * or if we need radar detection. Beaconing is usually not allowed when
2217 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2218 * Passive scan is also used in world regulatory domains where
2219 * your country is not known and as such it should be treated as
2220 * NO TX unless the channel is explicitly allowed in which case
2221 * your current regulatory domain would not have the passive scan
2222 * flag.
2223 *
2224 * Since AP mode uses monitor interfaces to inject/TX management
2225 * frames we can make AP mode the exception to this rule once it
2226 * supports radar detection as its implementation can deal with
2227 * radar detection by itself. We can do that later by adding a
2228 * monitor flag interfaces used for AP support.
2229 */
b4932836
JD		 2230 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2231 sdata->vif.type))
55de908a
JB		 2232 goto fail_rcu;
2233
73c4e195 2234 info->band = chandef->chan->band;
109843b0
LB		 2235
2236 /* process and remove the injection radiotap header */
2237 if (!ieee80211_parse_tx_radiotap(local, skb))
2238 goto fail_rcu;
2239
7c10770f 2240 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2241 rcu_read_unlock();
2242
e2ebc74d 2243 return NETDEV_TX_OK;
9b8a74e3 2244
55de908a
JB		 2245fail_rcu:
2246 rcu_read_unlock();
9b8a74e3
AG		 2247fail:
2248 dev_kfree_skb(skb);
2249 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2250}
2251
97ffe757 2252static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2253{
97ffe757 2254 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2255
97ffe757
JB		 2256 return ethertype == ETH_P_TDLS &&
2257 skb->len > 14 &&
2258 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2259}
2260
2261static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2262 struct sk_buff *skb,
2263 struct sta_info **sta_out)
2264{
2265 struct sta_info *sta;
2266
2267 switch (sdata->vif.type) {
2268 case NL80211_IFTYPE_AP_VLAN:
2269 sta = rcu_dereference(sdata->u.vlan.sta);
2270 if (sta) {
2271 *sta_out = sta;
2272 return 0;
2273 } else if (sdata->wdev.use_4addr) {
2274 return -ENOLINK;
2275 }
2276 /* fall through */
2277 case NL80211_IFTYPE_AP:
2278 case NL80211_IFTYPE_OCB:
2279 case NL80211_IFTYPE_ADHOC:
2280 if (is_multicast_ether_addr(skb->data)) {
2281 *sta_out = ERR_PTR(-ENOENT);
2282 return 0;
2283 }
2284 sta = sta_info_get_bss(sdata, skb->data);
2285 break;
2286 case NL80211_IFTYPE_WDS:
2287 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2288 break;
2289#ifdef CONFIG_MAC80211_MESH
2290 case NL80211_IFTYPE_MESH_POINT:
2291 /* determined much later */
2292 *sta_out = NULL;
2293 return 0;
2294#endif
2295 case NL80211_IFTYPE_STATION:
2296 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2297 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2298 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2299 if (test_sta_flag(sta,
2300 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2301 *sta_out = sta;
2302 return 0;
2303 }
2304
2305 /*
2306 * TDLS link during setup - throw out frames to
2307 * peer. Allow TDLS-setup frames to unauthorized
2308 * peers for the special case of a link teardown
2309 * after a TDLS sta is removed due to being
2310 * unreachable.
2311 */
11d62caf 2312 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2313 return -EINVAL;
2314 }
2315
2316 }
2317
2318 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2319 if (!sta)
2320 return -ENOLINK;
2321 break;
2322 default:
2323 return -EINVAL;
2324 }
2325
2326 *sta_out = sta ?: ERR_PTR(-ENOENT);
2327 return 0;
ad38bfc9
MG		 2328}
2329
e2ebc74d 2330/**
4c9451ed
JB		 2331 * ieee80211_build_hdr - build 802.11 header in the given frame
2332 * @sdata: virtual interface to build the header for
2333 * @skb: the skb to build the header in
24d342c5 2334 * @info_flags: skb flags to set
e2ebc74d 2335 *
4c9451ed
JB		 2336 * This function takes the skb with 802.3 header and reformats the header to
2337 * the appropriate IEEE 802.11 header based on which interface the packet is
2338 * being transmitted on.
2339 *
2340 * Note that this function also takes care of the TX status request and
2341 * potential unsharing of the SKB - this needs to be interleaved with the
2342 * header building.
e2ebc74d 2343 *
4c9451ed
JB		 2344 * The function requires the read-side RCU lock held
2345 *
2346 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2347 */
4c9451ed 2348static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2349 struct sk_buff *skb, u32 info_flags,
97ffe757 2350 struct sta_info *sta)
e2ebc74d 2351{
133b8226 2352 struct ieee80211_local *local = sdata->local;
489ee919 2353 struct ieee80211_tx_info *info;
dcf33963 2354 int head_need;
065e9605
HH		 2355 u16 ethertype, hdrlen, meshhdrlen = 0;
2356 __le16 fc;
e2ebc74d 2357 struct ieee80211_hdr hdr;
ff67bb86 2358 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2359 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2360 const u8 *encaps_data;
2361 int encaps_len, skip_header_bytes;
97ffe757
JB		 2362 bool wme_sta = false, authorized = false;
2363 bool tdls_peer;
a729cff8 2364 bool multicast;
a729cff8 2365 u16 info_id = 0;
55de908a
JB		 2366 struct ieee80211_chanctx_conf *chanctx_conf;
2367 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2368 enum nl80211_band band;
4c9451ed 2369 int ret;
e2ebc74d 2370
97ffe757
JB		 2371 if (IS_ERR(sta))
2372 sta = NULL;
2373
e2ebc74d
JB		 2374 /* convert Ethernet header to proper 802.11 header (based on
2375 * operation mode) */
2376 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2377 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2378
51fb61e7 2379 switch (sdata->vif.type) {
05c914fe 2380 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2381 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2382 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2383 /* RA TA DA SA */
2384 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2385 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2386 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2387 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2388 hdrlen = 30;
c2c98fde 2389 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2390 wme_sta = sta->sta.wme;
f14543ee 2391 }
55de908a
JB		 2392 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2393 u.ap);
2394 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2395 if (!chanctx_conf) {
2396 ret = -ENOTCONN;
2397 goto free;
2398 }
4bf88530 2399 band = chanctx_conf->def.chan->band;
97ffe757 2400 if (sdata->wdev.use_4addr)
f14543ee
FF		 2401 break;
2402 /* fall through */
2403 case NL80211_IFTYPE_AP:
fe80123d
AB		 2404 if (sdata->vif.type == NL80211_IFTYPE_AP)
2405 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2406 if (!chanctx_conf) {
2407 ret = -ENOTCONN;
2408 goto free;
2409 }
065e9605 2410 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2411 /* DA BSSID SA */
2412 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2413 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2414 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2415 hdrlen = 24;
4bf88530 2416 band = chanctx_conf->def.chan->band;
cf966838 2417 break;
05c914fe 2418 case NL80211_IFTYPE_WDS:
065e9605 2419 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2420 /* RA TA DA SA */
2421 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2422 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2423 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2424 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2425 hdrlen = 30;
55de908a
JB		 2426 /*
2427 * This is the exception! WDS style interfaces are prohibited
2428 * when channel contexts are in used so this must be valid
2429 */
675a0b04 2430 band = local->hw.conf.chandef.chan->band;
cf966838 2431 break;
33b64eb2 2432#ifdef CONFIG_MAC80211_MESH
05c914fe 2433 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2434 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2435 struct sta_info *next_hop;
2436 bool mpp_lookup = true;
2437
bf7cd94d 2438 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2439 if (mpath) {
2440 mpp_lookup = false;
2441 next_hop = rcu_dereference(mpath->next_hop);
2442 if (!next_hop ||
2443 !(mpath->flags & (MESH_PATH_ACTIVE |
2444 MESH_PATH_RESOLVING)))
2445 mpp_lookup = true;
2446 }
2447
ab1c7906 2448 if (mpp_lookup) {
bf7cd94d 2449 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2450 if (mppath)
2451 mppath->exp_time = jiffies;
2452 }
163df6cf
CYY		 2453
2454 if (mppath && mpath)
2bdaf386 2455 mesh_path_del(sdata, mpath->dst);
b8bacc18 2456 }
79617dee 2457
f76b57b4 2458 /*
9d52501b
JF		 2459 * Use address extension if it is a packet from
2460 * another interface or if we know the destination
2461 * is being proxied by a portal (i.e. portal address
2462 * differs from proxied address)
f76b57b4 2463 */
b203ca39
JP		 2464 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2465 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2466 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2467 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2468 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2469 NULL, NULL);
79617dee 2470 } else {
27f01124
TP		 2471 /* DS -> MBSS (802.11-2012 13.11.3.3).
2472 * For unicast with unknown forwarding information,
2473 * destination might be in the MBSS or if that fails
2474 * forwarded to another mesh gate. In either case
2475 * resolution will be handled in ieee80211_xmit(), so
2476 * leave the original DA. This also works for mcast */
2477 const u8 *mesh_da = skb->data;
2478
2479 if (mppath)
2480 mesh_da = mppath->mpp;
2481 else if (mpath)
2482 mesh_da = mpath->dst;
79617dee 2483
3c5772a5 2484 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2485 mesh_da, sdata->vif.addr);
27f01124
TP		 2486 if (is_multicast_ether_addr(mesh_da))
2487 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2488 meshhdrlen = ieee80211_new_mesh_header(
2489 sdata, &mesh_hdr,
2490 skb->data + ETH_ALEN, NULL);
3c5772a5 2491 else
27f01124 2492 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2493 meshhdrlen = ieee80211_new_mesh_header(
2494 sdata, &mesh_hdr, skb->data,
2495 skb->data + ETH_ALEN);
79617dee 2496
79617dee 2497 }
55de908a 2498 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2499 if (!chanctx_conf) {
2500 ret = -ENOTCONN;
2501 goto free;
2502 }
4bf88530 2503 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2504 break;
2505#endif
05c914fe 2506 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2507 /* we already did checks when looking up the RA STA */
2508 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2509
97ffe757 2510 if (tdls_peer) {
941c93cd
AN		 2511 /* DA SA BSSID */
2512 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2513 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2514 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2515 hdrlen = 24;
2516 } else if (sdata->u.mgd.use_4addr &&
2517 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2518 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2519 IEEE80211_FCTL_TODS);
f14543ee 2520 /* RA TA DA SA */
941c93cd 2521 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2522 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2523 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2524 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2525 hdrlen = 30;
2526 } else {
2527 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2528 /* BSSID SA DA */
941c93cd 2529 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2530 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2531 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2532 hdrlen = 24;
2533 }
55de908a 2534 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2535 if (!chanctx_conf) {
2536 ret = -ENOTCONN;
2537 goto free;
2538 }
4bf88530 2539 band = chanctx_conf->def.chan->band;
cf966838 2540 break;
239281f8
RL		 2541 case NL80211_IFTYPE_OCB:
2542 /* DA SA BSSID */
2543 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2544 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2545 eth_broadcast_addr(hdr.addr3);
2546 hdrlen = 24;
2547 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2548 if (!chanctx_conf) {
2549 ret = -ENOTCONN;
2550 goto free;
2551 }
239281f8
RL		 2552 band = chanctx_conf->def.chan->band;
2553 break;
05c914fe 2554 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2555 /* DA SA BSSID */
2556 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2557 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2558 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2559 hdrlen = 24;
55de908a 2560 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2561 if (!chanctx_conf) {
2562 ret = -ENOTCONN;
2563 goto free;
2564 }
4bf88530 2565 band = chanctx_conf->def.chan->band;
cf966838
JB		 2566 break;
2567 default:
4c9451ed
JB		 2568 ret = -EINVAL;
2569 goto free;
e2ebc74d
JB		 2570 }
2571
a729cff8 2572 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2573
97ffe757
JB		 2574 /* sta is always NULL for mesh */
2575 if (sta) {
2576 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2577 wme_sta = sta->sta.wme;
2578 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2579 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2580 wme_sta = true;
97ffe757 2581 }
4777be41 2582
527871d7
JB		 2583 /* receiver does QoS (which also means we do) use it */
2584 if (wme_sta) {
065e9605 2585 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2586 hdrlen += 2;
2587 }
2588
2589 /*
238814fd
JB		 2590 * Drop unicast frames to unauthorised stations unless they are
2591 * EAPOL frames from the local station.
ce3edf6d 2592 */
55182e4a 2593 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2594 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2595 !multicast && !authorized &&
55182e4a 2596 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2597 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2598#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2599 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2600 sdata->name, hdr.addr1);
ce3edf6d
JB		 2601#endif
2602
2603 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2604
4c9451ed
JB		 2605 ret = -EPERM;
2606 goto free;
ce3edf6d
JB		 2607 }
2608
a729cff8
JB		 2609 if (unlikely(!multicast && skb->sk &&
2610 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2611 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2612
bf7fa551 2613 if (ack_skb) {
a729cff8 2614 unsigned long flags;
9475af6e 2615 int id;
a729cff8
JB		 2616
2617 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2618 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2619 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2620 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2621
9475af6e 2622 if (id >= 0) {
a729cff8
JB		 2623 info_id = id;
2624 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2625 } else {
bf7fa551 2626 kfree_skb(ack_skb);
a729cff8 2627 }
a729cff8
JB		 2628 }
2629 }
2630
7e244707
HS		 2631 /*
2632 * If the skb is shared we need to obtain our own copy.
2633 */
2634 if (skb_shared(skb)) {
a729cff8
JB		 2635 struct sk_buff *tmp_skb = skb;
2636
2637 /* can't happen -- skb is a clone if info_id != 0 */
2638 WARN_ON(info_id);
2639
f8a0a781 2640 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2641 kfree_skb(tmp_skb);
2642
4c9451ed
JB		 2643 if (!skb) {
2644 ret = -ENOMEM;
2645 goto free;
2646 }
7e244707
HS		 2647 }
2648
065e9605 2649 hdr.frame_control = fc;
e2ebc74d
JB		 2650 hdr.duration_id = 0;
2651 hdr.seq_ctrl = 0;
2652
2653 skip_header_bytes = ETH_HLEN;
2654 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2655 encaps_data = bridge_tunnel_header;
2656 encaps_len = sizeof(bridge_tunnel_header);
2657 skip_header_bytes -= 2;
e5c5d22e 2658 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2659 encaps_data = rfc1042_header;
2660 encaps_len = sizeof(rfc1042_header);
2661 skip_header_bytes -= 2;
2662 } else {
2663 encaps_data = NULL;
2664 encaps_len = 0;
2665 }
2666
2667 skb_pull(skb, skip_header_bytes);
23c0752a 2668 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2669
23c0752a
JB		 2670 /*
2671 * So we need to modify the skb header and hence need a copy of
2672 * that. The head_need variable above doesn't, so far, include
2673 * the needed header space that we don't need right away. If we
2674 * can, then we don't reallocate right now but only after the
2675 * frame arrives at the master device (if it does...)
2676 *
2677 * If we cannot, however, then we will reallocate to include all
2678 * the ever needed space. Also, if we need to reallocate it anyway,
2679 * make it big enough for everything we may ever need.
2680 */
e2ebc74d 2681
3a5be7d4 2682 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2683 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2684 head_need += local->tx_headroom;
2685 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2686 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2687 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2688 skb = NULL;
4c9451ed 2689 return ERR_PTR(-ENOMEM);
c3e7724b 2690 }
e2ebc74d
JB		 2691 }
2692
eae4430e 2693 if (encaps_data)
e2ebc74d 2694 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2695
e4ab7eb0 2696#ifdef CONFIG_MAC80211_MESH
eae4430e 2697 if (meshhdrlen > 0)
33b64eb2 2698 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2699#endif
33b64eb2 2700
065e9605 2701 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2702 __le16 *qos_control;
2703
f359d3fe 2704 qos_control = (__le16 *) skb_push(skb, 2);
c29b9b9b
JB		 2705 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2706 /*
2707 * Maybe we could actually set some fields here, for now just
2708 * initialise to zero to indicate no special operation.
2709 */
2710 *qos_control = 0;
2711 } else
2712 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2713
d57a544d 2714 skb_reset_mac_header(skb);
e2ebc74d 2715
489ee919 2716 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2717 memset(info, 0, sizeof(*info));
2718
a729cff8
JB		 2719 info->flags = info_flags;
2720 info->ack_frame_id = info_id;
73c4e195 2721 info->band = band;
a729cff8 2722
4c9451ed
JB		 2723 return skb;
2724 free:
2725 kfree_skb(skb);
2726 return ERR_PTR(ret);
2727}
2728
17c18bf8
JB		 2729/*
2730 * fast-xmit overview
2731 *
2732 * The core idea of this fast-xmit is to remove per-packet checks by checking
2733 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2734 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2735 * much less work can be done per packet. For example, fragmentation must be
2736 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2737 * in the code here.
2738 *
2739 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2740 * header and other data to aid packet processing in ieee80211_xmit_fast().
2741 *
2742 * The most difficult part of this is that when any of these assumptions
2743 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2744 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2745 * since the per-packet code no longer checks the conditions. This is reflected
2746 * by the calls to these functions throughout the rest of the code, and must be
2747 * maintained if any of the TX path checks change.
2748 */
2749
2750void ieee80211_check_fast_xmit(struct sta_info *sta)
2751{
2752 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2753 struct ieee80211_local *local = sta->local;
2754 struct ieee80211_sub_if_data *sdata = sta->sdata;
2755 struct ieee80211_hdr *hdr = (void *)build.hdr;
2756 struct ieee80211_chanctx_conf *chanctx_conf;
2757 __le16 fc;
2758
30686bf7 2759 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2760 return;
2761
2762 /* Locking here protects both the pointer itself, and against concurrent
2763 * invocations winning data access races to, e.g., the key pointer that
2764 * is used.
2765 * Without it, the invocation of this function right after the key
2766 * pointer changes wouldn't be sufficient, as another CPU could access
2767 * the pointer, then stall, and then do the cache update after the CPU
2768 * that invalidated the key.
2769 * With the locking, such scenarios cannot happen as the check for the
2770 * key and the fast-tx assignment are done atomically, so the CPU that
2771 * modifies the key will either wait or other one will see the key
2772 * cleared/changed already.
2773 */
2774 spin_lock_bh(&sta->lock);
30686bf7
JB		 2775 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2776 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2777 sdata->vif.type == NL80211_IFTYPE_STATION)
2778 goto out;
2779
2780 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2781 goto out;
2782
2783 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2784 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2785 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2786 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2787 goto out;
2788
2789 if (sdata->noack_map)
2790 goto out;
2791
2792 /* fast-xmit doesn't handle fragmentation at all */
725b812c 2793 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
f3fe4e93 2794 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
17c18bf8
JB		 2795 goto out;
2796
2797 rcu_read_lock();
2798 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2799 if (!chanctx_conf) {
2800 rcu_read_unlock();
2801 goto out;
2802 }
2803 build.band = chanctx_conf->def.chan->band;
2804 rcu_read_unlock();
2805
2806 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2807
2808 switch (sdata->vif.type) {
3ffd8840
JB		 2809 case NL80211_IFTYPE_ADHOC:
2810 /* DA SA BSSID */
2811 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2812 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2813 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2814 build.hdr_len = 24;
2815 break;
17c18bf8
JB		 2816 case NL80211_IFTYPE_STATION:
2817 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2818 /* DA SA BSSID */
2819 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2820 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2821 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2822 build.hdr_len = 24;
2823 break;
2824 }
2825
2826 if (sdata->u.mgd.use_4addr) {
2827 /* non-regular ethertype cannot use the fastpath */
2828 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2829 IEEE80211_FCTL_TODS);
2830 /* RA TA DA SA */
2831 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2832 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2833 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2834 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2835 build.hdr_len = 30;
2836 break;
2837 }
2838 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2839 /* BSSID SA DA */
2840 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2841 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2842 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2843 build.hdr_len = 24;
2844 break;
2845 case NL80211_IFTYPE_AP_VLAN:
2846 if (sdata->wdev.use_4addr) {
2847 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2848 IEEE80211_FCTL_TODS);
2849 /* RA TA DA SA */
2850 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2851 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2852 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2853 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2854 build.hdr_len = 30;
2855 break;
2856 }
2857 /* fall through */
2858 case NL80211_IFTYPE_AP:
2859 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2860 /* DA BSSID SA */
2861 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2862 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2863 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2864 build.hdr_len = 24;
2865 break;
2866 default:
2867 /* not handled on fast-xmit */
2868 goto out;
2869 }
2870
2871 if (sta->sta.wme) {
2872 build.hdr_len += 2;
2873 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2874 }
2875
2876 /* We store the key here so there's no point in using rcu_dereference()
2877 * but that's fine because the code that changes the pointers will call
2878 * this function after doing so. For a single CPU that would be enough,
2879 * for multiple see the comment above.
2880 */
2881 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2882 if (!build.key)
2883 build.key = rcu_access_pointer(sdata->default_unicast_key);
2884 if (build.key) {
e495c247 2885 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2886
2887 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2888 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
e495c247 2889 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
17c18bf8
JB		 2890
2891 /* don't handle software crypto */
2892 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2893 goto out;
2894
2895 switch (build.key->conf.cipher) {
2896 case WLAN_CIPHER_SUITE_CCMP:
2897 case WLAN_CIPHER_SUITE_CCMP_256:
2898 /* add fixed key ID */
2899 if (gen_iv) {
2900 (build.hdr + build.hdr_len)[3] =
2901 0x20 | (build.key->conf.keyidx << 6);
2902 build.pn_offs = build.hdr_len;
2903 }
2904 if (gen_iv || iv_spc)
2905 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2906 break;
2907 case WLAN_CIPHER_SUITE_GCMP:
2908 case WLAN_CIPHER_SUITE_GCMP_256:
2909 /* add fixed key ID */
2910 if (gen_iv) {
2911 (build.hdr + build.hdr_len)[3] =
2912 0x20 | (build.key->conf.keyidx << 6);
2913 build.pn_offs = build.hdr_len;
2914 }
2915 if (gen_iv || iv_spc)
2916 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2917 break;
e495c247
JB		 2918 case WLAN_CIPHER_SUITE_TKIP:
2919 /* cannot handle MMIC or IV generation in xmit-fast */
2920 if (mmic || gen_iv)
2921 goto out;
2922 if (iv_spc)
2923 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2924 break;
2925 case WLAN_CIPHER_SUITE_WEP40:
2926 case WLAN_CIPHER_SUITE_WEP104:
2927 /* cannot handle IV generation in fast-xmit */
2928 if (gen_iv)
2929 goto out;
2930 if (iv_spc)
2931 build.hdr_len += IEEE80211_WEP_IV_LEN;
2932 break;
2933 case WLAN_CIPHER_SUITE_AES_CMAC:
2934 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2935 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2936 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2937 WARN(1,
2938 "management cipher suite 0x%x enabled for data\n",
2939 build.key->conf.cipher);
17c18bf8 2940 goto out;
e495c247
JB		 2941 default:
2942 /* we don't know how to generate IVs for this at all */
2943 if (WARN_ON(gen_iv))
2944 goto out;
2945 /* pure hardware keys are OK, of course */
2946 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2947 break;
2948 /* cipher scheme might require space allocation */
2949 if (iv_spc &&
2950 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2951 goto out;
2952 if (iv_spc)
2953 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 2954 }
2955
2956 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2957 }
2958
2959 hdr->frame_control = fc;
2960
2961 memcpy(build.hdr + build.hdr_len,
2962 rfc1042_header, sizeof(rfc1042_header));
2963 build.hdr_len += sizeof(rfc1042_header);
2964
2965 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2966 /* if the kmemdup fails, continue w/o fast_tx */
2967 if (!fast_tx)
2968 goto out;
2969
2970 out:
2971 /* we might have raced against another call to this function */
2972 old = rcu_dereference_protected(sta->fast_tx,
2973 lockdep_is_held(&sta->lock));
2974 rcu_assign_pointer(sta->fast_tx, fast_tx);
2975 if (old)
2976 kfree_rcu(old, rcu_head);
2977 spin_unlock_bh(&sta->lock);
2978}
2979
2980void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2981{
2982 struct sta_info *sta;
2983
2984 rcu_read_lock();
2985 list_for_each_entry_rcu(sta, &local->sta_list, list)
2986 ieee80211_check_fast_xmit(sta);
2987 rcu_read_unlock();
2988}
2989
2990void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
2991{
2992 struct ieee80211_local *local = sdata->local;
2993 struct sta_info *sta;
2994
2995 rcu_read_lock();
2996
2997 list_for_each_entry_rcu(sta, &local->sta_list, list) {
2998 if (sdata != sta->sdata &&
2999 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3000 continue;
3001 ieee80211_check_fast_xmit(sta);
3002 }
3003
3004 rcu_read_unlock();
3005}
3006
3007void ieee80211_clear_fast_xmit(struct sta_info *sta)
3008{
3009 struct ieee80211_fast_tx *fast_tx;
3010
3011 spin_lock_bh(&sta->lock);
3012 fast_tx = rcu_dereference_protected(sta->fast_tx,
3013 lockdep_is_held(&sta->lock));
3014 RCU_INIT_POINTER(sta->fast_tx, NULL);
3015 spin_unlock_bh(&sta->lock);
3016
3017 if (fast_tx)
3018 kfree_rcu(fast_tx, rcu_head);
3019}
3020
6e0456b5
FF		 3021static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3022 struct sk_buff *skb, int headroom,
3023 int *subframe_len)
3024{
3025 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3026 int padding = (4 - amsdu_len) & 3;
3027
3028 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3029 I802_DEBUG_INC(local->tx_expand_skb_head);
3030
3031 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3032 wiphy_debug(local->hw.wiphy,
3033 "failed to reallocate TX buffer\n");
3034 return false;
3035 }
3036 }
3037
3038 if (padding) {
3039 *subframe_len += padding;
3040 memset(skb_put(skb, padding), 0, padding);
3041 }
3042
3043 return true;
3044}
3045
3046static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3047 struct ieee80211_fast_tx *fast_tx,
3048 struct sk_buff *skb)
3049{
3050 struct ieee80211_local *local = sdata->local;
3051 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3052 struct ieee80211_hdr *hdr;
06f2bb1e 3053 struct ethhdr *amsdu_hdr;
6e0456b5
FF		 3054 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3055 int subframe_len = skb->len - hdr_len;
3056 void *data;
06f2bb1e 3057 u8 *qc, *h_80211_src, *h_80211_dst;
a3e2f4b6 3058 const u8 *bssid;
6e0456b5
FF		 3059
3060 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3061 return false;
3062
3063 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3064 return true;
3065
06f2bb1e 3066 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr),
6e0456b5
FF		 3067 &subframe_len))
3068 return false;
3069
06f2bb1e
MB		 3070 data = skb_push(skb, sizeof(*amsdu_hdr));
3071 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3072 hdr = data;
3073 amsdu_hdr = data + hdr_len;
3074 /* h_80211_src/dst is addr* field within hdr */
3075 h_80211_src = data + fast_tx->sa_offs;
3076 h_80211_dst = data + fast_tx->da_offs;
6e0456b5 3077
06f2bb1e
MB		 3078 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3079 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3080 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
6e0456b5 3081
a3e2f4b6
MB		 3082 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3083 * fields needs to be changed to BSSID for A-MSDU frames depending
3084 * on FromDS/ToDS values.
3085 */
3086 switch (sdata->vif.type) {
3087 case NL80211_IFTYPE_STATION:
3088 bssid = sdata->u.mgd.bssid;
3089 break;
3090 case NL80211_IFTYPE_AP:
3091 case NL80211_IFTYPE_AP_VLAN:
3092 bssid = sdata->vif.addr;
3093 break;
3094 default:
3095 bssid = NULL;
3096 }
3097
3098 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3099 ether_addr_copy(h_80211_src, bssid);
3100
3101 if (bssid && ieee80211_has_tods(hdr->frame_control))
3102 ether_addr_copy(h_80211_dst, bssid);
3103
6e0456b5
FF		 3104 qc = ieee80211_get_qos_ctl(hdr);
3105 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3106
3107 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3108
3109 return true;
3110}
3111
3112static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3113 struct sta_info *sta,
3114 struct ieee80211_fast_tx *fast_tx,
3115 struct sk_buff *skb)
3116{
3117 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3118 struct fq *fq = &local->fq;
3119 struct fq_tin *tin;
3120 struct fq_flow *flow;
6e0456b5
FF		 3121 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3122 struct ieee80211_txq *txq = sta->sta.txq[tid];
3123 struct txq_info *txqi;
3124 struct sk_buff **frag_tail, *head;
3125 int subframe_len = skb->len - ETH_ALEN;
3126 u8 max_subframes = sta->sta.max_amsdu_subframes;
3127 int max_frags = local->hw.max_tx_fragments;
3128 int max_amsdu_len = sta->sta.max_amsdu_len;
3129 __be16 len;
3130 void *data;
3131 bool ret = false;
fa962b92 3132 unsigned int orig_len;
6e0456b5
FF		 3133 int n = 1, nfrags;
3134
3135 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3136 return false;
3137
3138 if (!txq)
3139 return false;
3140
3141 txqi = to_txq_info(txq);
3142 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3143 return false;
3144
3145 if (sta->sta.max_rc_amsdu_len)
3146 max_amsdu_len = min_t(int, max_amsdu_len,
3147 sta->sta.max_rc_amsdu_len);
3148
fa962b92 3149 spin_lock_bh(&fq->lock);
6e0456b5 3150
fa962b92
MK		 3151 /* TODO: Ideally aggregation should be done on dequeue to remain
3152 * responsive to environment changes.
3153 */
3154
3155 tin = &txqi->tin;
3156 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3157 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3158 if (!head)
3159 goto out;
3160
fa962b92
MK		 3161 orig_len = head->len;
3162
6e0456b5
FF		 3163 if (skb->len + head->len > max_amsdu_len)
3164 goto out;
3165
3166 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3167 goto out;
3168
3169 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3170 nfrags += 1 + skb_shinfo(head)->nr_frags;
3171 frag_tail = &skb_shinfo(head)->frag_list;
3172 while (*frag_tail) {
3173 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3174 frag_tail = &(*frag_tail)->next;
3175 n++;
3176 }
3177
3178 if (max_subframes && n > max_subframes)
3179 goto out;
3180
3181 if (max_frags && nfrags > max_frags)
3182 goto out;
3183
3184 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3185 &subframe_len))
3186 goto out;
3187
3188 ret = true;
3189 data = skb_push(skb, ETH_ALEN + 2);
3190 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3191
3192 data += 2 * ETH_ALEN;
3193 len = cpu_to_be16(subframe_len);
3194 memcpy(data, &len, 2);
3195 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3196
3197 head->len += skb->len;
3198 head->data_len += skb->len;
3199 *frag_tail = skb;
3200
fa962b92
MK		 3201 flow->backlog += head->len - orig_len;
3202 tin->backlog_bytes += head->len - orig_len;
3203
3204 fq_recalc_backlog(fq, tin, flow);
3205
6e0456b5 3206out:
fa962b92 3207 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3208
3209 return ret;
3210}
3211
bb42f2d1
THJ		 3212/*
3213 * Can be called while the sta lock is held. Anything that can cause packets to
3214 * be generated will cause deadlock!
3215 */
3216static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3217 struct sta_info *sta, u8 pn_offs,
3218 struct ieee80211_key *key,
3219 struct sk_buff *skb)
3220{
3221 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3222 struct ieee80211_hdr *hdr = (void *)skb->data;
3223 u8 tid = IEEE80211_NUM_TIDS;
3224
3225 if (key)
3226 info->control.hw_key = &key->conf;
3227
3228 ieee80211_tx_stats(skb->dev, skb->len);
3229
3230 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3231 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
bb42f2d1
THJ		 3232 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3233 } else {
3234 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3235 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3236 sdata->sequence_number += 0x10;
3237 }
3238
3239 if (skb_shinfo(skb)->gso_size)
3240 sta->tx_stats.msdu[tid] +=
3241 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3242 else
3243 sta->tx_stats.msdu[tid]++;
3244
3245 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3246
3247 /* statistics normally done by ieee80211_tx_h_stats (but that
3248 * has to consider fragmentation, so is more complex)
3249 */
3250 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3251 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3252
3253 if (pn_offs) {
3254 u64 pn;
3255 u8 *crypto_hdr = skb->data + pn_offs;
3256
3257 switch (key->conf.cipher) {
3258 case WLAN_CIPHER_SUITE_CCMP:
3259 case WLAN_CIPHER_SUITE_CCMP_256:
3260 case WLAN_CIPHER_SUITE_GCMP:
3261 case WLAN_CIPHER_SUITE_GCMP_256:
3262 pn = atomic64_inc_return(&key->conf.tx_pn);
3263 crypto_hdr[0] = pn;
3264 crypto_hdr[1] = pn >> 8;
3265 crypto_hdr[4] = pn >> 16;
3266 crypto_hdr[5] = pn >> 24;
3267 crypto_hdr[6] = pn >> 32;
3268 crypto_hdr[7] = pn >> 40;
3269 break;
3270 }
3271 }
3272}
3273
17c18bf8 3274static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3275 struct sta_info *sta,
17c18bf8
JB		 3276 struct ieee80211_fast_tx *fast_tx,
3277 struct sk_buff *skb)
3278{
3279 struct ieee80211_local *local = sdata->local;
3280 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3281 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3282 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3283 struct ethhdr eth;
35f432a0 3284 struct ieee80211_tx_info *info;
17c18bf8
JB		 3285 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3286 struct ieee80211_tx_data tx;
3287 ieee80211_tx_result r;
3288 struct tid_ampdu_tx *tid_tx = NULL;
3289 u8 tid = IEEE80211_NUM_TIDS;
3290
3291 /* control port protocol needs a lot of special handling */
3292 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3293 return false;
3294
3295 /* only RFC 1042 SNAP */
3296 if (ethertype < ETH_P_802_3_MIN)
3297 return false;
3298
3299 /* don't handle TX status request here either */
3300 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3301 return false;
3302
3303 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3304 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3305 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3306 if (tid_tx) {
3307 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3308 return false;
3309 if (tid_tx->timeout)
3310 tid_tx->last_tx = jiffies;
3311 }
17c18bf8
JB		 3312 }
3313
3314 /* after this point (skb is modified) we cannot return false */
3315
3316 if (skb_shared(skb)) {
3317 struct sk_buff *tmp_skb = skb;
3318
3319 skb = skb_clone(skb, GFP_ATOMIC);
3320 kfree_skb(tmp_skb);
3321
3322 if (!skb)
3323 return true;
3324 }
3325
6e0456b5
FF		 3326 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3327 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3328 return true;
3329
17c18bf8
JB		 3330 /* will not be crypto-handled beyond what we do here, so use false
3331 * as the may-encrypt argument for the resize to not account for
3332 * more room than we already have in 'extra_head'
3333 */
3334 if (unlikely(ieee80211_skb_resize(sdata, skb,
3335 max_t(int, extra_head + hw_headroom -
3336 skb_headroom(skb), 0),
3337 false))) {
3338 kfree_skb(skb);
3339 return true;
3340 }
3341
3342 memcpy(&eth, skb->data, ETH_HLEN - 2);
3343 hdr = (void *)skb_push(skb, extra_head);
3344 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3345 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3346 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3347
35f432a0 3348 info = IEEE80211_SKB_CB(skb);
17c18bf8
JB		 3349 memset(info, 0, sizeof(*info));
3350 info->band = fast_tx->band;
3351 info->control.vif = &sdata->vif;
3352 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3353 IEEE80211_TX_CTL_DONTFRAG |
3354 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3355 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8 3356
a786f96d
FF		 3357 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3358 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3359 *ieee80211_get_qos_ctl(hdr) = tid;
3360 }
3361
17c18bf8
JB		 3362 __skb_queue_head_init(&tx.skbs);
3363
3364 tx.flags = IEEE80211_TX_UNICAST;
3365 tx.local = local;
3366 tx.sdata = sdata;
3367 tx.sta = sta;
3368 tx.key = fast_tx->key;
3369
30686bf7 3370 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3371 tx.skb = skb;
3372 r = ieee80211_tx_h_rate_ctrl(&tx);
3373 skb = tx.skb;
3374 tx.skb = NULL;
3375
3376 if (r != TX_CONTINUE) {
3377 if (r != TX_QUEUED)
3378 kfree_skb(skb);
3379 return true;
3380 }
3381 }
3382
bb42f2d1
THJ		 3383 if (ieee80211_queue_skb(local, sdata, sta, skb))
3384 return true;
17c18bf8 3385
bb42f2d1
THJ		 3386 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3387 fast_tx->key, skb);
17c18bf8
JB		 3388
3389 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3390 sdata = container_of(sdata->bss,
3391 struct ieee80211_sub_if_data, u.ap);
3392
3393 __skb_queue_tail(&tx.skbs, skb);
3394 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3395 return true;
3396}
3397
e0e2efff
THJ		 3398struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3399 struct ieee80211_txq *txq)
3400{
3401 struct ieee80211_local *local = hw_to_local(hw);
3402 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3403 struct ieee80211_hdr *hdr;
3404 struct sk_buff *skb = NULL;
3405 struct fq *fq = &local->fq;
3406 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3407 struct ieee80211_tx_info *info;
3408 struct ieee80211_tx_data tx;
3409 ieee80211_tx_result r;
e0e2efff
THJ		 3410
3411 spin_lock_bh(&fq->lock);
3412
3413 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3414 goto out;
3415
bb42f2d1
THJ		 3416 /* Make sure fragments stay together. */
3417 skb = __skb_dequeue(&txqi->frags);
3418 if (skb)
3419 goto out;
3420
3421begin:
e0e2efff
THJ		 3422 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3423 if (!skb)
3424 goto out;
3425
3426 ieee80211_set_skb_vif(skb, txqi);
3427
3428 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3429 info = IEEE80211_SKB_CB(skb);
3430
3431 memset(&tx, 0, sizeof(tx));
3432 __skb_queue_head_init(&tx.skbs);
3433 tx.local = local;
3434 tx.skb = skb;
3435 tx.sdata = vif_to_sdata(info->control.vif);
3436
3437 if (txq->sta)
3438 tx.sta = container_of(txq->sta, struct sta_info, sta);
3439
3440 /*
3441 * The key can be removed while the packet was queued, so need to call
3442 * this here to get the current key.
3443 */
3444 r = ieee80211_tx_h_select_key(&tx);
3445 if (r != TX_CONTINUE) {
3446 ieee80211_free_txskb(&local->hw, skb);
3447 goto begin;
3448 }
3449
c1f4c9ed
FF		 3450 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3451 info->flags |= IEEE80211_TX_CTL_AMPDU;
3452 else
3453 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3454
bb42f2d1 3455 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3456 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3457 sta);
bb42f2d1 3458 u8 pn_offs = 0;
e0e2efff 3459
bb42f2d1
THJ		 3460 if (tx.key &&
3461 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3462 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3463
3464 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3465 tx.key, skb);
3466 } else {
3467 if (invoke_tx_handlers_late(&tx))
3468 goto begin;
3469
3470 skb = __skb_dequeue(&tx.skbs);
3471
3472 if (!skb_queue_empty(&tx.skbs))
3473 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
e0e2efff
THJ		 3474 }
3475
1e1430d5
JB		 3476 if (skb && skb_has_frag_list(skb) &&
3477 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3478 if (skb_linearize(skb)) {
3479 ieee80211_free_txskb(&local->hw, skb);
3480 goto begin;
3481 }
3482 }
3483
e0e2efff
THJ		 3484out:
3485 spin_unlock_bh(&fq->lock);
3486
e0e2efff
THJ		 3487 return skb;
3488}
3489EXPORT_SYMBOL(ieee80211_tx_dequeue);
3490
4c9451ed
JB		 3491void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3492 struct net_device *dev,
3493 u32 info_flags)
3494{
3495 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3496 struct sta_info *sta;
80616c0d 3497 struct sk_buff *next;
4c9451ed
JB		 3498
3499 if (unlikely(skb->len < ETH_HLEN)) {
3500 kfree_skb(skb);
3501 return;
3502 }
3503
3504 rcu_read_lock();
e2ebc74d 3505
2d981fdd
JB		 3506 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3507 goto out_free;
4c9451ed 3508
17c18bf8
JB		 3509 if (!IS_ERR_OR_NULL(sta)) {
3510 struct ieee80211_fast_tx *fast_tx;
3511
3512 fast_tx = rcu_dereference(sta->fast_tx);
3513
3514 if (fast_tx &&
bb42f2d1 3515 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3516 goto out;
3517 }
3518
80616c0d
JB		 3519 if (skb_is_gso(skb)) {
3520 struct sk_buff *segs;
680a0dab 3521
80616c0d
JB		 3522 segs = skb_gso_segment(skb, 0);
3523 if (IS_ERR(segs)) {
2d981fdd 3524 goto out_free;
80616c0d
JB		 3525 } else if (segs) {
3526 consume_skb(skb);
3527 skb = segs;
3528 }
3529 } else {
3530 /* we cannot process non-linear frames on this path */
3531 if (skb_linearize(skb)) {
3532 kfree_skb(skb);
3533 goto out;
3534 }
3535
3536 /* the frame could be fragmented, software-encrypted, and other
3537 * things so we cannot really handle checksum offload with it -
3538 * fix it up in software before we handle anything else.
3539 */
3540 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3541 skb_set_transport_header(skb,
3542 skb_checksum_start_offset(skb));
80616c0d
JB		 3543 if (skb_checksum_help(skb))
3544 goto out_free;
3545 }
2d981fdd
JB		 3546 }
3547
80616c0d
JB		 3548 next = skb;
3549 while (next) {
3550 skb = next;
3551 next = skb->next;
4c9451ed 3552
80616c0d
JB		 3553 skb->prev = NULL;
3554 skb->next = NULL;
3555
3556 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3557 if (IS_ERR(skb))
3558 goto out;
e2ebc74d 3559
5a490510 3560 ieee80211_tx_stats(dev, skb->len);
80616c0d
JB		 3561
3562 ieee80211_xmit(sdata, sta, skb);
3563 }
2d981fdd
JB		 3564 goto out;
3565 out_free:
3566 kfree_skb(skb);
4c9451ed 3567 out:
55de908a 3568 rcu_read_unlock();
e2ebc74d
JB		 3569}
3570
ebceec86
MB		 3571static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3572{
3573 struct ethhdr *eth;
3574 int err;
3575
3576 err = skb_ensure_writable(skb, ETH_HLEN);
3577 if (unlikely(err))
3578 return err;
3579
3580 eth = (void *)skb->data;
3581 ether_addr_copy(eth->h_dest, sta->sta.addr);
3582
3583 return 0;
3584}
3585
3586static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3587 struct net_device *dev)
3588{
3589 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3590 const struct ethhdr *eth = (void *)skb->data;
3591 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3592 __be16 ethertype;
3593
3594 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3595 return false;
3596
3597 switch (sdata->vif.type) {
3598 case NL80211_IFTYPE_AP_VLAN:
3599 if (sdata->u.vlan.sta)
3600 return false;
3601 if (sdata->wdev.use_4addr)
3602 return false;
3603 /* fall through */
3604 case NL80211_IFTYPE_AP:
3605 /* check runtime toggle for this bss */
3606 if (!sdata->bss->multicast_to_unicast)
3607 return false;
3608 break;
3609 default:
3610 return false;
3611 }
3612
3613 /* multicast to unicast conversion only for some payload */
3614 ethertype = eth->h_proto;
3615 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3616 ethertype = ethvlan->h_vlan_encapsulated_proto;
3617 switch (ethertype) {
3618 case htons(ETH_P_ARP):
3619 case htons(ETH_P_IP):
3620 case htons(ETH_P_IPV6):
3621 break;
3622 default:
3623 return false;
3624 }
3625
3626 return true;
3627}
3628
3629static void
3630ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3631 struct sk_buff_head *queue)
3632{
3633 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3634 struct ieee80211_local *local = sdata->local;
3635 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3636 struct sta_info *sta, *first = NULL;
3637 struct sk_buff *cloned_skb;
3638
3639 rcu_read_lock();
3640
3641 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3642 if (sdata != sta->sdata)
3643 /* AP-VLAN mismatch */
3644 continue;
3645 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3646 /* do not send back to source */
3647 continue;
3648 if (!first) {
3649 first = sta;
3650 continue;
3651 }
3652 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3653 if (!cloned_skb)
3654 goto multicast;
3655 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3656 dev_kfree_skb(cloned_skb);
3657 goto multicast;
3658 }
3659 __skb_queue_tail(queue, cloned_skb);
3660 }
3661
3662 if (likely(first)) {
3663 if (unlikely(ieee80211_change_da(skb, first)))
3664 goto multicast;
3665 __skb_queue_tail(queue, skb);
3666 } else {
3667 /* no STA connected, drop */
3668 kfree_skb(skb);
3669 skb = NULL;
3670 }
3671
3672 goto out;
3673multicast:
3674 __skb_queue_purge(queue);
3675 __skb_queue_tail(queue, skb);
3676out:
3677 rcu_read_unlock();
3678}
3679
4c9451ed
JB		 3680/**
3681 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3682 * @skb: packet to be sent
3683 * @dev: incoming interface
3684 *
3685 * On failure skb will be freed.
3686 */
24d342c5
LK		 3687netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3688 struct net_device *dev)
3689{
ebceec86
MB		 3690 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
3691 struct sk_buff_head queue;
3692
3693 __skb_queue_head_init(&queue);
3694 ieee80211_convert_to_unicast(skb, dev, &queue);
3695 while ((skb = __skb_dequeue(&queue)))
3696 __ieee80211_subif_start_xmit(skb, dev, 0);
3697 } else {
3698 __ieee80211_subif_start_xmit(skb, dev, 0);
3699 }
3700
24d342c5
LK		 3701 return NETDEV_TX_OK;
3702}
e2ebc74d 3703
7528ec57
JB		 3704struct sk_buff *
3705ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3706 struct sk_buff *skb, u32 info_flags)
3707{
3708 struct ieee80211_hdr *hdr;
3709 struct ieee80211_tx_data tx = {
3710 .local = sdata->local,
3711 .sdata = sdata,
3712 };
97ffe757 3713 struct sta_info *sta;
7528ec57
JB		 3714
3715 rcu_read_lock();
3716
97ffe757
JB		 3717 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3718 kfree_skb(skb);
3719 skb = ERR_PTR(-EINVAL);
3720 goto out;
3721 }
3722
3723 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3724 if (IS_ERR(skb))
3725 goto out;
3726
3727 hdr = (void *)skb->data;
3728 tx.sta = sta_info_get(sdata, hdr->addr1);
3729 tx.skb = skb;
3730
3731 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3732 rcu_read_unlock();
3733 kfree_skb(skb);
3734 return ERR_PTR(-EINVAL);
3735 }
3736
3737out:
3738 rcu_read_unlock();
3739 return skb;
3740}
3741
e2530083
JB		 3742/*
3743 * ieee80211_clear_tx_pending may not be called in a context where
3744 * it is possible that it packets could come in again.
3745 */
e2ebc74d
JB		 3746void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3747{
1f98ab7f 3748 struct sk_buff *skb;
2de8e0d9 3749 int i;
e2ebc74d 3750
1f98ab7f
FF		 3751 for (i = 0; i < local->hw.queues; i++) {
3752 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3753 ieee80211_free_txskb(&local->hw, skb);
3754 }
e2ebc74d
JB		 3755}
3756
7bb45683
JB		 3757/*
3758 * Returns false if the frame couldn't be transmitted but was queued instead,
3759 * which in this case means re-queued -- take as an indication to stop sending
3760 * more pending frames.
3761 */
cd8ffc80
JB		 3762static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3763 struct sk_buff *skb)
3764{
3765 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3766 struct ieee80211_sub_if_data *sdata;
3767 struct sta_info *sta;
3768 struct ieee80211_hdr *hdr;
7bb45683 3769 bool result;
55de908a 3770 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3771
5061b0c2 3772 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3773
3774 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3775 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3776 if (unlikely(!chanctx_conf)) {
3777 dev_kfree_skb(skb);
3778 return true;
3779 }
73c4e195 3780 info->band = chanctx_conf->def.chan->band;
7c10770f 3781 result = ieee80211_tx(sdata, NULL, skb, true);
cd8ffc80 3782 } else {
252b86c4
JB		 3783 struct sk_buff_head skbs;
3784
3785 __skb_queue_head_init(&skbs);
3786 __skb_queue_tail(&skbs, skb);
3787
cd8ffc80 3788 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3789 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3790
74e4dbfd 3791 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3792 }
3793
cd8ffc80
JB		 3794 return result;
3795}
3796
e2530083 3797/*
3b8d81e0 3798 * Transmit all pending packets. Called from tasklet.
e2530083 3799 */
e2ebc74d
JB		 3800void ieee80211_tx_pending(unsigned long data)
3801{
3802 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3803 unsigned long flags;
cd8ffc80 3804 int i;
3b8d81e0 3805 bool txok;
e2ebc74d 3806
f0e72851 3807 rcu_read_lock();
e2530083 3808
3b8d81e0 3809 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3810 for (i = 0; i < local->hw.queues; i++) {
3811 /*
3812 * If queue is stopped by something other than due to pending
3813 * frames, or we have no pending frames, proceed to next queue.
3814 */
3b8d81e0 3815 if (local->queue_stop_reasons[i] ||
2a577d98 3816 skb_queue_empty(&local->pending[i]))
e2ebc74d 3817 continue;
e2530083 3818
2a577d98 3819 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3820 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3821 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3822
a7bc376c 3823 if (WARN_ON(!info->control.vif)) {
c3e7724b 3824 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3825 continue;
3826 }
3827
3b8d81e0
JB		 3828 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3829 flags);
3830
3831 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3832 spin_lock_irqsave(&local->queue_stop_reason_lock,
3833 flags);
3834 if (!txok)
2a577d98 3835 break;
e2ebc74d 3836 }
7236fe29
JB		 3837
3838 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3839 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3840 }
3b8d81e0 3841 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3842
f0e72851 3843 rcu_read_unlock();
e2ebc74d
JB		 3844}
3845
3846/* functions for drivers to get certain frames */
3847
eac70c13 3848static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3849 struct ps_data *ps, struct sk_buff *skb,
3850 bool is_template)
e2ebc74d
JB		 3851{
3852 u8 *pos, *tim;
3853 int aid0 = 0;
3854 int i, have_bits = 0, n1, n2;
3855
3856 /* Generate bitmap for TIM only if there are any STAs in power save
3857 * mode. */
d012a605 3858 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3859 /* in the hope that this is faster than
3860 * checking byte-for-byte */
f359d3fe 3861 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3862 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3863 if (!is_template) {
3864 if (ps->dtim_count == 0)
3865 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3866 else
3867 ps->dtim_count--;
3868 }
e2ebc74d
JB		 3869
3870 tim = pos = (u8 *) skb_put(skb, 6);
3871 *pos++ = WLAN_EID_TIM;
3872 *pos++ = 4;
d012a605 3873 *pos++ = ps->dtim_count;
8860020e 3874 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3875
d012a605 3876 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3877 aid0 = 1;
3878
d012a605 3879 ps->dtim_bc_mc = aid0 == 1;
512119b3 3880
e2ebc74d
JB		 3881 if (have_bits) {
3882 /* Find largest even number N1 so that bits numbered 1 through
3883 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3884 * (N2 + 1) x 8 through 2007 are 0. */
3885 n1 = 0;
3886 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3887 if (ps->tim[i]) {
e2ebc74d
JB		 3888 n1 = i & 0xfe;
3889 break;
3890 }
3891 }
3892 n2 = n1;
3893 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3894 if (ps->tim[i]) {
e2ebc74d
JB		 3895 n2 = i;
3896 break;
3897 }
3898 }
3899
3900 /* Bitmap control */
3901 *pos++ = n1 | aid0;
3902 /* Part Virt Bitmap */
5220da39 3903 skb_put(skb, n2 - n1);
d012a605 3904 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3905
3906 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 3907 } else {
3908 *pos++ = aid0; /* Bitmap control */
3909 *pos++ = 0; /* Part Virt Bitmap */
3910 }
e2ebc74d
JB		 3911}
3912
eac70c13 3913static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3914 struct ps_data *ps, struct sk_buff *skb,
3915 bool is_template)
eac70c13
MP		 3916{
3917 struct ieee80211_local *local = sdata->local;
3918
3919 /*
3920 * Not very nice, but we want to allow the driver to call
3921 * ieee80211_beacon_get() as a response to the set_tim()
3922 * callback. That, however, is already invoked under the
3923 * sta_lock to guarantee consistent and race-free update
3924 * of the tim bitmap in mac80211 and the driver.
3925 */
3926 if (local->tim_in_locked_section) {
6ec8c332 3927 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 3928 } else {
1b91731d 3929 spin_lock_bh(&local->tim_lock);
6ec8c332 3930 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 3931 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 3932 }
3933
3934 return 0;
3935}
3936
1af586c9
AO		 3937static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3938 struct beacon_data *beacon)
73da7d5b
SW		 3939{
3940 struct probe_resp *resp;
cd7760e6
SW		 3941 u8 *beacon_data;
3942 size_t beacon_data_len;
0d06d9ba 3943 int i;
af296bdb 3944 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 3945
3946 switch (sdata->vif.type) {
3947 case NL80211_IFTYPE_AP:
3948 beacon_data = beacon->tail;
3949 beacon_data_len = beacon->tail_len;
3950 break;
3951 case NL80211_IFTYPE_ADHOC:
3952 beacon_data = beacon->head;
3953 beacon_data_len = beacon->head_len;
3954 break;
b8456a14
CYY		 3955 case NL80211_IFTYPE_MESH_POINT:
3956 beacon_data = beacon->head;
3957 beacon_data_len = beacon->head_len;
3958 break;
cd7760e6
SW		 3959 default:
3960 return;
3961 }
73da7d5b 3962
af296bdb 3963 rcu_read_lock();
0d06d9ba 3964 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 3965 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 3966
af296bdb
MK		 3967 if (beacon->csa_counter_offsets[i]) {
3968 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3969 beacon_data_len)) {
0d06d9ba
AO		 3970 rcu_read_unlock();
3971 return;
3972 }
af296bdb
MK		 3973
3974 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 3975 }
af296bdb
MK		 3976
3977 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3978 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 3979 }
af296bdb 3980 rcu_read_unlock();
1af586c9
AO		 3981}
3982
e996ec2a
WD		 3983static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3984{
3985 beacon->csa_current_counter--;
3986
3987 /* the counter should never reach 0 */
3988 WARN_ON_ONCE(!beacon->csa_current_counter);
3989
3990 return beacon->csa_current_counter;
3991}
3992
1af586c9
AO		 3993u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3994{
3995 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 3996 struct beacon_data *beacon = NULL;
3997 u8 count = 0;
0d06d9ba 3998
af296bdb
MK		 3999 rcu_read_lock();
4000
4001 if (sdata->vif.type == NL80211_IFTYPE_AP)
4002 beacon = rcu_dereference(sdata->u.ap.beacon);
4003 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4004 beacon = rcu_dereference(sdata->u.ibss.presp);
4005 else if (ieee80211_vif_is_mesh(&sdata->vif))
4006 beacon = rcu_dereference(sdata->u.mesh.beacon);
4007
4008 if (!beacon)
4009 goto unlock;
4010
e996ec2a 4011 count = __ieee80211_csa_update_counter(beacon);
1af586c9 4012
af296bdb
MK		 4013unlock:
4014 rcu_read_unlock();
4015 return count;
73da7d5b 4016}
1af586c9 4017EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b
SW		 4018
4019bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4020{
4021 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4022 struct beacon_data *beacon = NULL;
4023 u8 *beacon_data;
4024 size_t beacon_data_len;
73da7d5b
SW		 4025 int ret = false;
4026
4027 if (!ieee80211_sdata_running(sdata))
4028 return false;
4029
4030 rcu_read_lock();
4031 if (vif->type == NL80211_IFTYPE_AP) {
4032 struct ieee80211_if_ap *ap = &sdata->u.ap;
4033
4034 beacon = rcu_dereference(ap->beacon);
4035 if (WARN_ON(!beacon || !beacon->tail))
4036 goto out;
4037 beacon_data = beacon->tail;
4038 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 4039 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4040 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4041
4042 beacon = rcu_dereference(ifibss->presp);
4043 if (!beacon)
4044 goto out;
4045
b8456a14
CYY		 4046 beacon_data = beacon->head;
4047 beacon_data_len = beacon->head_len;
4048 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4049 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4050
4051 beacon = rcu_dereference(ifmsh->beacon);
4052 if (!beacon)
4053 goto out;
4054
cd7760e6
SW		 4055 beacon_data = beacon->head;
4056 beacon_data_len = beacon->head_len;
73da7d5b
SW		 4057 } else {
4058 WARN_ON(1);
4059 goto out;
4060 }
4061
10d78f27
MK		 4062 if (!beacon->csa_counter_offsets[0])
4063 goto out;
4064
af296bdb 4065 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 4066 goto out;
4067
af296bdb 4068 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 4069 ret = true;
4070 out:
4071 rcu_read_unlock();
4072
4073 return ret;
4074}
4075EXPORT_SYMBOL(ieee80211_csa_is_complete);
4076
6ec8c332
AO		 4077static struct sk_buff *
4078__ieee80211_beacon_get(struct ieee80211_hw *hw,
4079 struct ieee80211_vif *vif,
4080 struct ieee80211_mutable_offsets *offs,
4081 bool is_template)
e2ebc74d
JB		 4082{
4083 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 4084 struct beacon_data *beacon = NULL;
9d139c81 4085 struct sk_buff *skb = NULL;
e039fa4a 4086 struct ieee80211_tx_info *info;
e2ebc74d 4087 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 4088 enum nl80211_band band;
e00cfce0 4089 struct ieee80211_tx_rate_control txrc;
55de908a 4090 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 4091 int csa_off_base = 0;
8318d78a 4092
5dfdaf58 4093 rcu_read_lock();
e2ebc74d 4094
32bfd35d 4095 sdata = vif_to_sdata(vif);
55de908a 4096 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 4097
55de908a 4098 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 4099 goto out;
4100
6ec8c332
AO		 4101 if (offs)
4102 memset(offs, 0, sizeof(*offs));
eddcbb94 4103
05c914fe 4104 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 4105 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 4106
af296bdb 4107 beacon = rcu_dereference(ap->beacon);
3ad97fbc 4108 if (beacon) {
10d78f27 4109 if (beacon->csa_counter_offsets[0]) {
1af586c9 4110 if (!is_template)
e996ec2a 4111 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 4112
4113 ieee80211_set_csa(sdata, beacon);
4114 }
73da7d5b 4115
902acc78
JB		 4116 /*
4117 * headroom, head length,
4118 * tail length and maximum TIM length
4119 */
4120 skb = dev_alloc_skb(local->tx_headroom +
4121 beacon->head_len +
70dabeb7
FF		 4122 beacon->tail_len + 256 +
4123 local->hw.extra_beacon_tailroom);
902acc78
JB		 4124 if (!skb)
4125 goto out;
33b64eb2 4126
902acc78
JB		 4127 skb_reserve(skb, local->tx_headroom);
4128 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4129 beacon->head_len);
33b64eb2 4130
6ec8c332
AO		 4131 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4132 is_template);
33b64eb2 4133
6ec8c332
AO		 4134 if (offs) {
4135 offs->tim_offset = beacon->head_len;
4136 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 4137
4138 /* for AP the csa offsets are from tail */
4139 csa_off_base = skb->len;
6ec8c332 4140 }
eddcbb94 4141
902acc78
JB		 4142 if (beacon->tail)
4143 memcpy(skb_put(skb, beacon->tail_len),
4144 beacon->tail, beacon->tail_len);
9d139c81
JB		 4145 } else
4146 goto out;
05c914fe 4147 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 4148 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4149 struct ieee80211_hdr *hdr;
33b64eb2 4150
af296bdb
MK		 4151 beacon = rcu_dereference(ifibss->presp);
4152 if (!beacon)
9d139c81
JB		 4153 goto out;
4154
10d78f27 4155 if (beacon->csa_counter_offsets[0]) {
1af586c9 4156 if (!is_template)
e996ec2a 4157 __ieee80211_csa_update_counter(beacon);
cd7760e6 4158
af296bdb 4159 ieee80211_set_csa(sdata, beacon);
1af586c9 4160 }
cd7760e6 4161
af296bdb 4162 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4163 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4164 if (!skb)
4165 goto out;
c3ffeab4 4166 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4167 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4168 beacon->head_len);
9d139c81
JB		 4169
4170 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4171 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4172 IEEE80211_STYPE_BEACON);
902acc78 4173 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4174 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4175
af296bdb
MK		 4176 beacon = rcu_dereference(ifmsh->beacon);
4177 if (!beacon)
ac1bd846 4178 goto out;
ac1bd846 4179
10d78f27 4180 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4181 if (!is_template)
4182 /* TODO: For mesh csa_counter is in TU, so
4183 * decrementing it by one isn't correct, but
4184 * for now we leave it consistent with overall
4185 * mac80211's behavior.
4186 */
e996ec2a 4187 __ieee80211_csa_update_counter(beacon);
1af586c9 4188
af296bdb 4189 ieee80211_set_csa(sdata, beacon);
1af586c9 4190 }
b8456a14 4191
dbf498fb 4192 if (ifmsh->sync_ops)
445cd452 4193 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
dbf498fb 4194
3b69a9c5 4195 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4196 beacon->head_len +
3f52b7e3 4197 256 + /* TIM IE */
af296bdb 4198 beacon->tail_len +
70dabeb7 4199 local->hw.extra_beacon_tailroom);
902acc78
JB		 4200 if (!skb)
4201 goto out;
2b5e1967 4202 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4203 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4204 beacon->head_len);
6ec8c332
AO		 4205 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4206
4207 if (offs) {
af296bdb
MK		 4208 offs->tim_offset = beacon->head_len;
4209 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4210 }
4211
af296bdb
MK		 4212 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
4213 beacon->tail_len);
9d139c81
JB		 4214 } else {
4215 WARN_ON(1);
5dfdaf58 4216 goto out;
e2ebc74d
JB		 4217 }
4218
1af586c9 4219 /* CSA offsets */
af296bdb 4220 if (offs && beacon) {
1af586c9
AO		 4221 int i;
4222
4223 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4224 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4225
4226 if (!csa_off)
4227 continue;
4228
4229 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4230 }
4231 }
4232
4bf88530 4233 band = chanctx_conf->def.chan->band;
55de908a 4234
e039fa4a
JB		 4235 info = IEEE80211_SKB_CB(skb);
4236
3b8d81e0 4237 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4238 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4239 info->band = band;
e00cfce0
JM		 4240
4241 memset(&txrc, 0, sizeof(txrc));
4242 txrc.hw = hw;
e31583cd 4243 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4244 txrc.bss_conf = &sdata->vif.bss_conf;
4245 txrc.skb = skb;
4246 txrc.reported_rate.idx = -1;
37eb0b16 4247 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
8f0729b1 4248 txrc.bss = true;
e00cfce0 4249 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4250
4251 info->control.vif = vif;
f591fa5d 4252
a472e71b
JL		 4253 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4254 IEEE80211_TX_CTL_ASSIGN_SEQ |
4255 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4256 out:
5dfdaf58 4257 rcu_read_unlock();
e2ebc74d 4258 return skb;
6ec8c332
AO		 4259
4260}
4261
4262struct sk_buff *
4263ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4264 struct ieee80211_vif *vif,
4265 struct ieee80211_mutable_offsets *offs)
4266{
4267 return __ieee80211_beacon_get(hw, vif, offs, true);
4268}
4269EXPORT_SYMBOL(ieee80211_beacon_get_template);
4270
4271struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4272 struct ieee80211_vif *vif,
4273 u16 *tim_offset, u16 *tim_length)
4274{
4275 struct ieee80211_mutable_offsets offs = {};
4276 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4277 struct sk_buff *copy;
4278 struct ieee80211_supported_band *sband;
4279 int shift;
4280
4281 if (!bcn)
4282 return bcn;
6ec8c332
AO		 4283
4284 if (tim_offset)
4285 *tim_offset = offs.tim_offset;
4286
4287 if (tim_length)
4288 *tim_length = offs.tim_length;
4289
35afa588
HS		 4290 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4291 !hw_to_local(hw)->monitors)
4292 return bcn;
4293
4294 /* send a copy to monitor interfaces */
4295 copy = skb_copy(bcn, GFP_ATOMIC);
4296 if (!copy)
4297 return bcn;
4298
4299 shift = ieee80211_vif_get_shift(vif);
21a8e9dd
MSS		 4300 sband = ieee80211_get_sband(vif_to_sdata(vif));
4301 if (!sband)
4302 return bcn;
4303
35afa588
HS		 4304 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4305
6ec8c332 4306 return bcn;
e2ebc74d 4307}
eddcbb94 4308EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4309
02945821
AN		 4310struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4311 struct ieee80211_vif *vif)
4312{
4313 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4314 struct sk_buff *skb = NULL;
4315 struct probe_resp *presp = NULL;
02945821
AN		 4316 struct ieee80211_hdr *hdr;
4317 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4318
4319 if (sdata->vif.type != NL80211_IFTYPE_AP)
4320 return NULL;
4321
4322 rcu_read_lock();
4323
4324 ap = &sdata->u.ap;
4325 presp = rcu_dereference(ap->probe_resp);
4326 if (!presp)
4327 goto out;
4328
aa7a0080 4329 skb = dev_alloc_skb(presp->len);
02945821
AN		 4330 if (!skb)
4331 goto out;
4332
aa7a0080
ES		 4333 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4334
02945821
AN		 4335 hdr = (struct ieee80211_hdr *) skb->data;
4336 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4337
4338out:
4339 rcu_read_unlock();
4340 return skb;
4341}
4342EXPORT_SYMBOL(ieee80211_proberesp_get);
4343
7044cc56
KV		 4344struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4345 struct ieee80211_vif *vif)
4346{
4347 struct ieee80211_sub_if_data *sdata;
4348 struct ieee80211_if_managed *ifmgd;
4349 struct ieee80211_pspoll *pspoll;
4350 struct ieee80211_local *local;
4351 struct sk_buff *skb;
4352
4353 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4354 return NULL;
4355
4356 sdata = vif_to_sdata(vif);
4357 ifmgd = &sdata->u.mgd;
4358 local = sdata->local;
4359
4360 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4361 if (!skb)
7044cc56 4362 return NULL;
d15b8459 4363
7044cc56
KV		 4364 skb_reserve(skb, local->hw.extra_tx_headroom);
4365
4366 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4367 memset(pspoll, 0, sizeof(*pspoll));
4368 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4369 IEEE80211_STYPE_PSPOLL);
4370 pspoll->aid = cpu_to_le16(ifmgd->aid);
4371
4372 /* aid in PS-Poll has its two MSBs each set to 1 */
4373 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4374
4375 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4376 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4377
4378 return skb;
4379}
4380EXPORT_SYMBOL(ieee80211_pspoll_get);
4381
4382struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4383 struct ieee80211_vif *vif)
4384{
4385 struct ieee80211_hdr_3addr *nullfunc;
4386 struct ieee80211_sub_if_data *sdata;
4387 struct ieee80211_if_managed *ifmgd;
4388 struct ieee80211_local *local;
4389 struct sk_buff *skb;
4390
4391 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4392 return NULL;
4393
4394 sdata = vif_to_sdata(vif);
4395 ifmgd = &sdata->u.mgd;
4396 local = sdata->local;
4397
4398 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 4399 if (!skb)
7044cc56 4400 return NULL;
d15b8459 4401
7044cc56
KV		 4402 skb_reserve(skb, local->hw.extra_tx_headroom);
4403
4404 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4405 sizeof(*nullfunc));
4406 memset(nullfunc, 0, sizeof(*nullfunc));
4407 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4408 IEEE80211_STYPE_NULLFUNC |
4409 IEEE80211_FCTL_TODS);
4410 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4411 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4412 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4413
4414 return skb;
4415}
4416EXPORT_SYMBOL(ieee80211_nullfunc_get);
4417
05e54ea6 4418struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4419 const u8 *src_addr,
05e54ea6 4420 const u8 *ssid, size_t ssid_len,
b9a9ada1 4421 size_t tailroom)
05e54ea6 4422{
a344d677 4423 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4424 struct ieee80211_hdr_3addr *hdr;
4425 struct sk_buff *skb;
4426 size_t ie_ssid_len;
4427 u8 *pos;
4428
05e54ea6
KV		 4429 ie_ssid_len = 2 + ssid_len;
4430
4431 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4432 ie_ssid_len + tailroom);
d15b8459 4433 if (!skb)
05e54ea6 4434 return NULL;
05e54ea6
KV		 4435
4436 skb_reserve(skb, local->hw.extra_tx_headroom);
4437
4438 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4439 memset(hdr, 0, sizeof(*hdr));
4440 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4441 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4442 eth_broadcast_addr(hdr->addr1);
a344d677 4443 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4444 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4445
4446 pos = skb_put(skb, ie_ssid_len);
4447 *pos++ = WLAN_EID_SSID;
4448 *pos++ = ssid_len;
88c868c4 4449 if (ssid_len)
05e54ea6
KV		 4450 memcpy(pos, ssid, ssid_len);
4451 pos += ssid_len;
4452
05e54ea6
KV		 4453 return skb;
4454}
4455EXPORT_SYMBOL(ieee80211_probereq_get);
4456
32bfd35d 4457void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4458 const void *frame, size_t frame_len,
e039fa4a 4459 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4460 struct ieee80211_rts *rts)
4461{
4462 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4463
065e9605
HH		 4464 rts->frame_control =
4465 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4466 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4467 frame_txctl);
e2ebc74d
JB		 4468 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4469 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4470}
4471EXPORT_SYMBOL(ieee80211_rts_get);
4472
32bfd35d 4473void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4474 const void *frame, size_t frame_len,
e039fa4a 4475 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4476 struct ieee80211_cts *cts)
4477{
4478 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4479
065e9605
HH		 4480 cts->frame_control =
4481 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4482 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4483 frame_len, frame_txctl);
e2ebc74d
JB		 4484 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4485}
4486EXPORT_SYMBOL(ieee80211_ctstoself_get);
4487
4488struct sk_buff *
32bfd35d 4489ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4490 struct ieee80211_vif *vif)
e2ebc74d
JB		 4491{
4492 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4493 struct sk_buff *skb = NULL;
5cf121c3 4494 struct ieee80211_tx_data tx;
e2ebc74d 4495 struct ieee80211_sub_if_data *sdata;
d012a605 4496 struct ps_data *ps;
e039fa4a 4497 struct ieee80211_tx_info *info;
55de908a 4498 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4499
32bfd35d 4500 sdata = vif_to_sdata(vif);
5dfdaf58 4501
5dfdaf58 4502 rcu_read_lock();
55de908a 4503 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4504
d012a605
MP		 4505 if (!chanctx_conf)
4506 goto out;
4507
4508 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4509 struct beacon_data *beacon =
4510 rcu_dereference(sdata->u.ap.beacon);
4511
4512 if (!beacon || !beacon->head)
4513 goto out;
4514
4515 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4516 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4517 ps = &sdata->u.mesh.ps;
d012a605 4518 } else {
747cf5e9 4519 goto out;
d012a605 4520 }
5dfdaf58 4521
d012a605 4522 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4523 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4524
e2ebc74d 4525 while (1) {
d012a605 4526 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4527 if (!skb)
747cf5e9 4528 goto out;
e2ebc74d
JB		 4529 local->total_ps_buffered--;
4530
d012a605 4531 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4532 struct ieee80211_hdr *hdr =
4533 (struct ieee80211_hdr *) skb->data;
4534 /* more buffered multicast/broadcast frames ==> set
4535 * MoreData flag in IEEE 802.11 header to inform PS
4536 * STAs */
4537 hdr->frame_control |=
4538 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4539 }
4540
112c44b2 4541 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4542 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4543 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4544 break;
6b07d9ca 4545 ieee80211_free_txskb(hw, skb);
e2ebc74d 4546 }
e039fa4a
JB		 4547
4548 info = IEEE80211_SKB_CB(skb);
4549
5cf121c3 4550 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4551 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4552
97b045d6 4553 if (invoke_tx_handlers(&tx))
e2ebc74d 4554 skb = NULL;
97b045d6 4555 out:
d0709a65 4556 rcu_read_unlock();
e2ebc74d
JB		 4557
4558 return skb;
4559}
4560EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4561
b6da911b
LK		 4562int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4563{
4564 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4565 struct ieee80211_sub_if_data *sdata = sta->sdata;
4566 struct ieee80211_local *local = sdata->local;
4567 int ret;
4568 u32 queues;
4569
4570 lockdep_assert_held(&local->sta_mtx);
4571
4572 /* only some cases are supported right now */
4573 switch (sdata->vif.type) {
4574 case NL80211_IFTYPE_STATION:
4575 case NL80211_IFTYPE_AP:
4576 case NL80211_IFTYPE_AP_VLAN:
4577 break;
4578 default:
4579 WARN_ON(1);
4580 return -EINVAL;
4581 }
4582
4583 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4584 return -EINVAL;
4585
4586 if (sta->reserved_tid == tid) {
4587 ret = 0;
4588 goto out;
4589 }
4590
4591 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4592 sdata_err(sdata, "TID reservation already active\n");
4593 ret = -EALREADY;
4594 goto out;
4595 }
4596
4597 ieee80211_stop_vif_queues(sdata->local, sdata,
4598 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4599
4600 synchronize_net();
4601
4602 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4603 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4604 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4605 __ieee80211_stop_tx_ba_session(sta, tid,
4606 AGG_STOP_LOCAL_REQUEST);
4607 }
4608
4609 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4610 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4611
4612 sta->reserved_tid = tid;
4613
4614 ieee80211_wake_vif_queues(local, sdata,
4615 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4616
30686bf7 4617 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4618 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4619
4620 ret = 0;
4621 out:
4622 return ret;
4623}
4624EXPORT_SYMBOL(ieee80211_reserve_tid);
4625
4626void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4627{
4628 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4629 struct ieee80211_sub_if_data *sdata = sta->sdata;
4630
4631 lockdep_assert_held(&sdata->local->sta_mtx);
4632
4633 /* only some cases are supported right now */
4634 switch (sdata->vif.type) {
4635 case NL80211_IFTYPE_STATION:
4636 case NL80211_IFTYPE_AP:
4637 case NL80211_IFTYPE_AP_VLAN:
4638 break;
4639 default:
4640 WARN_ON(1);
4641 return;
4642 }
4643
4644 if (tid != sta->reserved_tid) {
4645 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4646 return;
4647 }
4648
4649 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4650}
4651EXPORT_SYMBOL(ieee80211_unreserve_tid);
4652
55de908a
JB		 4653void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4654 struct sk_buff *skb, int tid,
57fbcce3 4655 enum nl80211_band band)
3b8d81e0 4656{
731977e9 4657 int ac = ieee80211_ac_from_tid(tid);
3a25a8c8 4658
d57a544d 4659 skb_reset_mac_header(skb);
3a25a8c8 4660 skb_set_queue_mapping(skb, ac);
cf6bb79a 4661 skb->priority = tid;
cf0277e7 4662
89afe614
JB		 4663 skb->dev = sdata->dev;
4664
3d34deb6
JB		 4665 /*
4666 * The other path calling ieee80211_xmit is from the tasklet,
4667 * and while we can handle concurrent transmissions locking
4668 * requirements are that we do not come into tx with bhs on.
4669 */
4670 local_bh_disable();
73c4e195 4671 IEEE80211_SKB_CB(skb)->band = band;
7c10770f 4672 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 4673 local_bh_enable();
3b8d81e0 4674}
Ubuntu Artful kernel mirror