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mac80211_hwsim: handle VHT rates in rx_status
[linux-2.6-block.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>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 *
12 * Transmit and frame generation functions.
13 */
14
15#include <linux/kernel.h>
16#include <linux/slab.h>
17#include <linux/skbuff.h>
18#include <linux/etherdevice.h>
19#include <linux/bitmap.h>
d4e46a3d 20#include <linux/rcupdate.h>
bc3b2d7f 21#include <linux/export.h>
881d966b 22#include <net/net_namespace.h>
e2ebc74d
JB		 23#include <net/ieee80211_radiotap.h>
24#include <net/cfg80211.h>
25#include <net/mac80211.h>
26#include <asm/unaligned.h>
27
28#include "ieee80211_i.h"
24487981 29#include "driver-ops.h"
2c8dccc7 30#include "led.h"
33b64eb2 31#include "mesh.h"
e2ebc74d
JB		 32#include "wep.h"
33#include "wpa.h"
34#include "wme.h"
2c8dccc7 35#include "rate.h"
e2ebc74d 36
e2ebc74d
JB		 37/* misc utils */
38
252b86c4
JB		 39static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
40 struct sk_buff *skb, int group_addr,
03f93c3d 41 int next_frag_len)
e2ebc74d
JB		 42{
43 int rate, mrate, erp, dur, i;
2e92e6f2 44 struct ieee80211_rate *txrate;
e2ebc74d 45 struct ieee80211_local *local = tx->local;
8318d78a 46 struct ieee80211_supported_band *sband;
358c8d9d 47 struct ieee80211_hdr *hdr;
252b86c4 48 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e6a9854b
JB		 49
50 /* assume HW handles this */
51 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
52 return 0;
53
54 /* uh huh? */
55 if (WARN_ON_ONCE(info->control.rates[0].idx < 0))
56 return 0;
e2ebc74d 57
2d56577b 58 sband = local->hw.wiphy->bands[info->band];
e6a9854b 59 txrate = &sband->bitrates[info->control.rates[0].idx];
8318d78a 60
e6a9854b 61 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 62
63 /*
64 * data and mgmt (except PS Poll):
65 * - during CFP: 32768
66 * - during contention period:
67 * if addr1 is group address: 0
68 * if more fragments = 0 and addr1 is individual address: time to
69 * transmit one ACK plus SIFS
70 * if more fragments = 1 and addr1 is individual address: time to
71 * transmit next fragment plus 2 x ACK plus 3 x SIFS
72 *
73 * IEEE 802.11, 9.6:
74 * - control response frame (CTS or ACK) shall be transmitted using the
75 * same rate as the immediately previous frame in the frame exchange
76 * sequence, if this rate belongs to the PHY mandatory rates, or else
77 * at the highest possible rate belonging to the PHY rates in the
78 * BSSBasicRateSet
79 */
252b86c4 80 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 81 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 82 /* TODO: These control frames are not currently sent by
ccd7b362 83 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 84 * needs to be updated to support duration field calculation.
85 *
86 * RTS: time needed to transmit pending data/mgmt frame plus
87 * one CTS frame plus one ACK frame plus 3 x SIFS
88 * CTS: duration of immediately previous RTS minus time
89 * required to transmit CTS and its SIFS
90 * ACK: 0 if immediately previous directed data/mgmt had
91 * more=0, with more=1 duration in ACK frame is duration
92 * from previous frame minus time needed to transmit ACK
93 * and its SIFS
94 * PS Poll: BIT(15) | BIT(14) | aid
95 */
96 return 0;
97 }
98
99 /* data/mgmt */
100 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 101 return cpu_to_le16(32768);
e2ebc74d
JB		 102
103 if (group_addr) /* Group address as the destination - no ACK */
104 return 0;
105
106 /* Individual destination address:
107 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
108 * CTS and ACK frames shall be transmitted using the highest rate in
109 * basic rate set that is less than or equal to the rate of the
110 * immediately previous frame and that is using the same modulation
111 * (CCK or OFDM). If no basic rate set matches with these requirements,
112 * the highest mandatory rate of the PHY that is less than or equal to
113 * the rate of the previous frame is used.
114 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
115 */
116 rate = -1;
8318d78a
JB		 117 /* use lowest available if everything fails */
118 mrate = sband->bitrates[0].bitrate;
119 for (i = 0; i < sband->n_bitrates; i++) {
120 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 121
8318d78a
JB		 122 if (r->bitrate > txrate->bitrate)
123 break;
e2ebc74d 124
bda3933a 125 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
8318d78a
JB		 126 rate = r->bitrate;
127
128 switch (sband->band) {
129 case IEEE80211_BAND_2GHZ: {
130 u32 flag;
131 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
132 flag = IEEE80211_RATE_MANDATORY_G;
133 else
134 flag = IEEE80211_RATE_MANDATORY_B;
135 if (r->flags & flag)
136 mrate = r->bitrate;
137 break;
138 }
139 case IEEE80211_BAND_5GHZ:
140 if (r->flags & IEEE80211_RATE_MANDATORY_A)
141 mrate = r->bitrate;
142 break;
3a0c52a6
VK		 143 case IEEE80211_BAND_60GHZ:
144 /* TODO, for now fall through */
8318d78a
JB		 145 case IEEE80211_NUM_BANDS:
146 WARN_ON(1);
147 break;
148 }
e2ebc74d
JB		 149 }
150 if (rate == -1) {
151 /* No matching basic rate found; use highest suitable mandatory
152 * PHY rate */
153 rate = mrate;
154 }
155
6674f210
SW		 156 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
157 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 158 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 159 dur = 0;
160 else
161 /* Time needed to transmit ACK
162 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
163 * to closest integer */
4ee73f33 164 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
bda3933a 165 tx->sdata->vif.bss_conf.use_short_preamble);
e2ebc74d
JB		 166
167 if (next_frag_len) {
168 /* Frame is fragmented: duration increases with time needed to
169 * transmit next fragment plus ACK and 2 x SIFS. */
170 dur *= 2; /* ACK + SIFS */
171 /* next fragment */
4ee73f33 172 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 173 txrate->bitrate, erp,
bda3933a 174 tx->sdata->vif.bss_conf.use_short_preamble);
e2ebc74d
JB		 175 }
176
03f93c3d 177 return cpu_to_le16(dur);
e2ebc74d
JB		 178}
179
e2ebc74d 180/* tx handlers */
5c1b98a5
KV		 181static ieee80211_tx_result debug_noinline
182ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
183{
184 struct ieee80211_local *local = tx->local;
0c74211d 185 struct ieee80211_if_managed *ifmgd;
5c1b98a5
KV		 186
187 /* driver doesn't support power save */
188 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
189 return TX_CONTINUE;
190
191 /* hardware does dynamic power save */
192 if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
193 return TX_CONTINUE;
194
195 /* dynamic power save disabled */
196 if (local->hw.conf.dynamic_ps_timeout <= 0)
197 return TX_CONTINUE;
198
199 /* we are scanning, don't enable power save */
200 if (local->scanning)
201 return TX_CONTINUE;
202
203 if (!local->ps_sdata)
204 return TX_CONTINUE;
205
206 /* No point if we're going to suspend */
207 if (local->quiescing)
208 return TX_CONTINUE;
209
0c74211d
KV		 210 /* dynamic ps is supported only in managed mode */
211 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
212 return TX_CONTINUE;
213
214 ifmgd = &tx->sdata->u.mgd;
215
216 /*
217 * Don't wakeup from power save if u-apsd is enabled, voip ac has
218 * u-apsd enabled and the frame is in voip class. This effectively
219 * means that even if all access categories have u-apsd enabled, in
220 * practise u-apsd is only used with the voip ac. This is a
221 * workaround for the case when received voip class packets do not
222 * have correct qos tag for some reason, due the network or the
223 * peer application.
224 *
dc41e4d4 225 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 226 * changed via debugfs, user needs to reassociate manually to have
227 * everything in sync.
228 */
4875d30d
JB		 229 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
230 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
231 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 232 return TX_CONTINUE;
233
5c1b98a5
KV		 234 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
235 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 236 IEEE80211_MAX_QUEUE_MAP,
5c1b98a5 237 IEEE80211_QUEUE_STOP_REASON_PS);
db28569a 238 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 239 ieee80211_queue_work(&local->hw,
240 &local->dynamic_ps_disable_work);
241 }
242
5db1c07c
LC		 243 /* Don't restart the timer if we're not disassociated */
244 if (!ifmgd->associated)
245 return TX_CONTINUE;
246
5c1b98a5
KV		 247 mod_timer(&local->dynamic_ps_timer, jiffies +
248 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
249
250 return TX_CONTINUE;
251}
e2ebc74d 252
d9e8a70f 253static ieee80211_tx_result debug_noinline
5cf121c3 254ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 255{
358c8d9d 256
e039fa4a 257 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 258 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 259 bool assoc = false;
e2ebc74d 260
e039fa4a 261 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 262 return TX_CONTINUE;
58d4185e 263
b23b025f
BG		 264 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
265 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 266 !ieee80211_is_probe_req(hdr->frame_control) &&
267 !ieee80211_is_nullfunc(hdr->frame_control))
268 /*
269 * When software scanning only nullfunc frames (to notify
270 * the sleep state to the AP) and probe requests (for the
271 * active scan) are allowed, all other frames should not be
272 * sent and we should not get here, but if we do
273 * nonetheless, drop them to avoid sending them
274 * off-channel. See the link below and
275 * ieee80211_start_scan() for more.
276 *
277 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
278 */
9ae54c84 279 return TX_DROP;
e2ebc74d 280
1be7fe8d
BJ		 281 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
282 return TX_CONTINUE;
283
05c914fe 284 if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
33b64eb2
LCC		 285 return TX_CONTINUE;
286
5cf121c3 287 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 288 return TX_CONTINUE;
e2ebc74d 289
c2c98fde
JB		 290 if (tx->sta)
291 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 292
5cf121c3 293 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 294 if (unlikely(!assoc &&
358c8d9d 295 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 296#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 297 sdata_info(tx->sdata,
298 "dropped data frame to not associated station %pM\n",
299 hdr->addr1);
300#endif
e2ebc74d 301 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 302 return TX_DROP;
e2ebc74d 303 }
29623892
JB		 304 } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP &&
305 ieee80211_is_data(hdr->frame_control) &&
030ef8f8 306 !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) {
29623892
JB		 307 /*
308 * No associated STAs - no need to send multicast
309 * frames.
310 */
311 return TX_DROP;
e2ebc74d
JB		 312 }
313
9ae54c84 314 return TX_CONTINUE;
e2ebc74d
JB		 315}
316
e2ebc74d
JB		 317/* This function is called whenever the AP is about to exceed the maximum limit
318 * of buffered frames for power saving STAs. This situation should not really
319 * happen often during normal operation, so dropping the oldest buffered packet
320 * from each queue should be OK to make some room for new frames. */
321static void purge_old_ps_buffers(struct ieee80211_local *local)
322{
323 int total = 0, purged = 0;
324 struct sk_buff *skb;
325 struct ieee80211_sub_if_data *sdata;
326 struct sta_info *sta;
327
79010420 328 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 329 struct ps_data *ps;
330
331 if (sdata->vif.type == NL80211_IFTYPE_AP)
332 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 333 else if (ieee80211_vif_is_mesh(&sdata->vif))
334 ps = &sdata->u.mesh.ps;
d012a605 335 else
e2ebc74d 336 continue;
d012a605
MP		 337
338 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 339 if (skb) {
340 purged++;
341 dev_kfree_skb(skb);
342 }
d012a605 343 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 344 }
e2ebc74d 345
948d887d
JB		 346 /*
347 * Drop one frame from each station from the lowest-priority
348 * AC that has frames at all.
349 */
d0709a65 350 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 351 int ac;
352
353 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
354 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
355 total += skb_queue_len(&sta->ps_tx_buf[ac]);
356 if (skb) {
357 purged++;
c3e7724b 358 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 359 break;
360 }
e2ebc74d 361 }
e2ebc74d 362 }
d0709a65 363
e2ebc74d 364 local->total_ps_buffered = total;
bdcbd8e0 365 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 366}
367
9ae54c84 368static ieee80211_tx_result
5cf121c3 369ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 370{
e039fa4a 371 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 372 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 373 struct ps_data *ps;
e039fa4a 374
7d54d0dd
JB		 375 /*
376 * broadcast/multicast frame
377 *
3f52b7e3 378 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 379 * the frame is buffered to be sent after DTIM beacon frame.
380 * This is done either by the hardware or us.
381 */
382
3f52b7e3 383 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 384 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
385 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
386 if (!tx->sdata->bss)
387 return TX_CONTINUE;
388
389 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 390 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
391 ps = &tx->sdata->u.mesh.ps;
d012a605 392 } else {
3e122be0 393 return TX_CONTINUE;
d012a605
MP		 394 }
395
3e122be0
JB		 396
397 /* no buffering for ordered frames */
358c8d9d 398 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 399 return TX_CONTINUE;
7d54d0dd
JB		 400
401 /* no stations in PS mode */
d012a605 402 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 403 return TX_CONTINUE;
7d54d0dd 404
62b517cb 405 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
3a25a8c8
JB		 406 if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
407 info->hw_queue = tx->sdata->vif.cab_queue;
62b1208e 408
62b517cb
JB		 409 /* device releases frame after DTIM beacon */
410 if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING))
62b1208e 411 return TX_CONTINUE;
62b1208e 412
7d54d0dd 413 /* buffered in mac80211 */
62b1208e
JB		 414 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
415 purge_old_ps_buffers(tx->local);
416
d012a605 417 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 418 ps_dbg(tx->sdata,
419 "BC TX buffer full - dropping the oldest frame\n");
d012a605 420 dev_kfree_skb(skb_dequeue(&ps->bc_buf));
62b1208e
JB		 421 } else
422 tx->local->total_ps_buffered++;
e2ebc74d 423
d012a605 424 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 425
62b1208e 426 return TX_QUEUED;
e2ebc74d
JB		 427}
428
fb733336
JM		 429static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
430 struct sk_buff *skb)
431{
432 if (!ieee80211_is_mgmt(fc))
433 return 0;
434
c2c98fde 435 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 436 return 0;
437
438 if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *)
439 skb->data))
440 return 0;
441
442 return 1;
443}
444
9ae54c84 445static ieee80211_tx_result
5cf121c3 446ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 447{
448 struct sta_info *sta = tx->sta;
e039fa4a 449 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 450 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 451 struct ieee80211_local *local = tx->local;
e2ebc74d 452
02f2f1a9 453 if (unlikely(!sta))
9ae54c84 454 return TX_CONTINUE;
e2ebc74d 455
c2c98fde
JB		 456 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
457 test_sta_flag(sta, WLAN_STA_PS_DRIVER)) &&
02f2f1a9 458 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 459 int ac = skb_get_queue_mapping(tx->skb);
460
02f2f1a9
JB		 461 /* only deauth, disassoc and action are bufferable MMPDUs */
462 if (ieee80211_is_mgmt(hdr->frame_control) &&
463 !ieee80211_is_deauth(hdr->frame_control) &&
464 !ieee80211_is_disassoc(hdr->frame_control) &&
465 !ieee80211_is_action(hdr->frame_control)) {
466 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
467 return TX_CONTINUE;
468 }
469
bdcbd8e0
JB		 470 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
471 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 472 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
473 purge_old_ps_buffers(tx->local);
948d887d
JB		 474 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
475 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 476 ps_dbg(tx->sdata,
477 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
478 sta->sta.addr, ac);
c3e7724b 479 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 480 } else
481 tx->local->total_ps_buffered++;
004c872e 482
e039fa4a 483 info->control.jiffies = jiffies;
5061b0c2 484 info->control.vif = &tx->sdata->vif;
8f77f384 485 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
948d887d 486 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
3393a608
JO		 487
488 if (!timer_pending(&local->sta_cleanup))
489 mod_timer(&local->sta_cleanup,
490 round_jiffies(jiffies +
491 STA_INFO_CLEANUP_INTERVAL));
492
c868cb35
JB		 493 /*
494 * We queued up some frames, so the TIM bit might
495 * need to be set, recalculate it.
496 */
497 sta_info_recalc_tim(sta);
498
9ae54c84 499 return TX_QUEUED;
bdcbd8e0
JB		 500 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
501 ps_dbg(tx->sdata,
502 "STA %pM in PS mode, but polling/in SP -> send frame\n",
503 sta->sta.addr);
e2ebc74d 504 }
e2ebc74d 505
9ae54c84 506 return TX_CONTINUE;
e2ebc74d
JB		 507}
508
d9e8a70f 509static ieee80211_tx_result debug_noinline
5cf121c3 510ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 511{
5cf121c3 512 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 513 return TX_CONTINUE;
e2ebc74d 514
5cf121c3 515 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 516 return ieee80211_tx_h_unicast_ps_buf(tx);
517 else
518 return ieee80211_tx_h_multicast_ps_buf(tx);
519}
520
a621fa4d
JB		 521static ieee80211_tx_result debug_noinline
522ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
523{
524 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
525
526 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol &&
527 tx->sdata->control_port_no_encrypt))
528 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
529
530 return TX_CONTINUE;
531}
532
d9e8a70f 533static ieee80211_tx_result debug_noinline
5cf121c3 534ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 535{
46e6de15 536 struct ieee80211_key *key;
e039fa4a 537 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 538 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 539
3b8d81e0 540 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 541 tx->key = NULL;
e31b8213 542 else if (tx->sta && (key = rcu_dereference(tx->sta->ptk)))
d4e46a3d 543 tx->key = key;
3cfcf6ac 544 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324
JM		 545 is_multicast_ether_addr(hdr->addr1) &&
546 ieee80211_is_robust_mgmt_frame(hdr) &&
3cfcf6ac
JM		 547 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
548 tx->key = key;
f7e0104c
JB		 549 else if (is_multicast_ether_addr(hdr->addr1) &&
550 (key = rcu_dereference(tx->sdata->default_multicast_key)))
551 tx->key = key;
552 else if (!is_multicast_ether_addr(hdr->addr1) &&
553 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 554 tx->key = key;
46e6de15
JB		 555 else if (info->flags & IEEE80211_TX_CTL_INJECTED)
556 tx->key = NULL;
557 else if (!tx->sdata->drop_unencrypted)
558 tx->key = NULL;
559 else if (tx->skb->protocol == tx->sdata->control_port_protocol)
560 tx->key = NULL;
561 else if (ieee80211_is_robust_mgmt_frame(hdr) &&
562 !(ieee80211_is_action(hdr->frame_control) &&
563 tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP)))
564 tx->key = NULL;
4922f71f
NC		 565 else if (ieee80211_is_mgmt(hdr->frame_control) &&
566 !ieee80211_is_robust_mgmt_frame(hdr))
567 tx->key = NULL;
46e6de15 568 else {
e2ebc74d 569 I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted);
9ae54c84 570 return TX_DROP;
46e6de15 571 }
e2ebc74d
JB		 572
573 if (tx->key) {
813d7669
JB		 574 bool skip_hw = false;
575
e2ebc74d 576 tx->key->tx_rx_count++;
011bfcc4 577 /* TODO: add threshold stuff again */
176e4f84 578
97359d12
JB		 579 switch (tx->key->conf.cipher) {
580 case WLAN_CIPHER_SUITE_WEP40:
581 case WLAN_CIPHER_SUITE_WEP104:
97359d12 582 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 583 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 584 tx->key = NULL;
585 break;
97359d12 586 case WLAN_CIPHER_SUITE_CCMP:
fb733336
JM		 587 if (!ieee80211_is_data_present(hdr->frame_control) &&
588 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
589 tx->skb))
590 tx->key = NULL;
3b43a187
KV		 591 else
592 skip_hw = (tx->key->conf.flags &
e548c49e 593 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 594 ieee80211_is_mgmt(hdr->frame_control);
fb733336 595 break;
97359d12 596 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac
JM		 597 if (!ieee80211_is_mgmt(hdr->frame_control))
598 tx->key = NULL;
599 break;
176e4f84 600 }
813d7669 601
e54faf29
JB		 602 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
603 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 604 return TX_DROP;
605
f12553eb 606 if (!skip_hw && tx->key &&
382b1655 607 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 608 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 609 }
610
9ae54c84 611 return TX_CONTINUE;
e2ebc74d
JB		 612}
613
d9e8a70f 614static ieee80211_tx_result debug_noinline
5cf121c3 615ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 616{
e039fa4a 617 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 618 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
619 struct ieee80211_supported_band *sband;
620 struct ieee80211_rate *rate;
a2c40249
SZ		 621 int i;
622 u32 len;
e6a9854b
JB		 623 bool inval = false, rts = false, short_preamble = false;
624 struct ieee80211_tx_rate_control txrc;
c2c98fde 625 bool assoc = false;
8318d78a 626
e6a9854b 627 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 628
2d56577b 629 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 630
a2c40249 631 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 632 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 633
634 /* set up the tx rate control struct we give the RC algo */
005e472b 635 txrc.hw = &tx->local->hw;
e6a9854b
JB		 636 txrc.sband = sband;
637 txrc.bss_conf = &tx->sdata->vif.bss_conf;
638 txrc.skb = tx->skb;
639 txrc.reported_rate.idx = -1;
2d56577b 640 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
37eb0b16
JM		 641 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
642 txrc.max_rate_idx = -1;
643 else
644 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
19468413 645 memcpy(txrc.rate_idx_mcs_mask,
2d56577b 646 tx->sdata->rc_rateidx_mcs_mask[info->band],
19468413 647 sizeof(txrc.rate_idx_mcs_mask));
8f0729b1 648 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 649 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
8f0729b1 650 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC);
e6a9854b
JB		 651
652 /* set up RTS protection if desired */
b9a5f8ca 653 if (len > tx->local->hw.wiphy->rts_threshold) {
e6a9854b 654 txrc.rts = rts = true;
e2ebc74d 655 }
e2ebc74d 656
e6a9854b
JB		 657 /*
658 * Use short preamble if the BSS can handle it, but not for
659 * management frames unless we know the receiver can handle
660 * that -- the management frame might be to a station that
661 * just wants a probe response.
662 */
663 if (tx->sdata->vif.bss_conf.use_short_preamble &&
664 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 665 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
e6a9854b 666 txrc.short_preamble = short_preamble = true;
e2ebc74d 667
c2c98fde
JB		 668 if (tx->sta)
669 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 670
671 /*
672 * Lets not bother rate control if we're associated and cannot
673 * talk to the sta. This should not happen.
674 */
c2c98fde 675 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 676 !rate_usable_index_exists(sband, &tx->sta->sta),
677 "%s: Dropped data frame as no usable bitrate found while "
678 "scanning and associated. Target station: "
679 "%pM on %d GHz band\n",
47846c9b 680 tx->sdata->name, hdr->addr1,
2d56577b 681 info->band ? 5 : 2))
b770b43e 682 return TX_DROP;
2e92e6f2 683
b770b43e
LR		 684 /*
685 * If we're associated with the sta at this point we know we can at
686 * least send the frame at the lowest bit rate.
687 */
e6a9854b
JB		 688 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
689
690 if (unlikely(info->control.rates[0].idx < 0))
691 return TX_DROP;
692
c1ce5a74 693 if (txrc.reported_rate.idx < 0) {
e6a9854b 694 txrc.reported_rate = info->control.rates[0];
c1ce5a74
HS		 695 if (tx->sta && ieee80211_is_data(hdr->frame_control))
696 tx->sta->last_tx_rate = txrc.reported_rate;
697 } else if (tx->sta)
e6a9854b 698 tx->sta->last_tx_rate = txrc.reported_rate;
e039fa4a 699
e6a9854b
JB		 700 if (unlikely(!info->control.rates[0].count))
701 info->control.rates[0].count = 1;
e2ebc74d 702
9955151d
GS		 703 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
704 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
705 info->control.rates[0].count = 1;
706
e6a9854b
JB		 707 if (is_multicast_ether_addr(hdr->addr1)) {
708 /*
709 * XXX: verify the rate is in the basic rateset
710 */
711 return TX_CONTINUE;
e2ebc74d
JB		 712 }
713
e6a9854b 714 /*
5253ffb8
KB		 715 * Set up the RTS/CTS rate as the fastest basic rate
716 * that is not faster than the data rate unless there
717 * is no basic rate slower than the data rate, in which
718 * case we pick the slowest basic rate
e6a9854b
JB		 719 *
720 * XXX: Should this check all retry rates?
721 */
722 if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) {
5253ffb8
KB		 723 u32 basic_rates = tx->sdata->vif.bss_conf.basic_rates;
724 s8 baserate = basic_rates ? ffs(basic_rates - 1) : 0;
e6a9854b
JB		 725
726 rate = &sband->bitrates[info->control.rates[0].idx];
727
728 for (i = 0; i < sband->n_bitrates; i++) {
729 /* must be a basic rate */
5253ffb8 730 if (!(basic_rates & BIT(i)))
e6a9854b
JB		 731 continue;
732 /* must not be faster than the data rate */
733 if (sband->bitrates[i].bitrate > rate->bitrate)
734 continue;
735 /* maximum */
736 if (sband->bitrates[baserate].bitrate <
737 sband->bitrates[i].bitrate)
738 baserate = i;
739 }
740
741 info->control.rts_cts_rate_idx = baserate;
7e9ed188
DD		 742 }
743
e6a9854b 744 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
fbd647b1
KB		 745 struct ieee80211_tx_rate *rc_rate = &info->control.rates[i];
746
e6a9854b
JB		 747 /*
748 * make sure there's no valid rate following
749 * an invalid one, just in case drivers don't
750 * take the API seriously to stop at -1.
751 */
752 if (inval) {
fbd647b1 753 rc_rate->idx = -1;
e6a9854b
JB		 754 continue;
755 }
fbd647b1 756 if (rc_rate->idx < 0) {
e6a9854b
JB		 757 inval = true;
758 continue;
759 }
8318d78a 760
e6a9854b
JB		 761 /*
762 * For now assume MCS is already set up correctly, this
763 * needs to be fixed.
764 */
fbd647b1
KB		 765 if (rc_rate->flags & IEEE80211_TX_RC_MCS) {
766 WARN_ON(rc_rate->idx > 76);
767 continue;
768 }
769
770 if (rc_rate->flags & IEEE80211_TX_RC_VHT_MCS) {
771 WARN_ON(ieee80211_rate_get_vht_mcs(rc_rate) > 9);
e6a9854b
JB		 772 continue;
773 }
e2ebc74d 774
e6a9854b
JB		 775 /* set up RTS protection if desired */
776 if (rts)
fbd647b1 777 rc_rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
8318d78a 778
e6a9854b 779 /* RC is busted */
fbd647b1
KB		 780 if (WARN_ON_ONCE(rc_rate->idx >= sband->n_bitrates)) {
781 rc_rate->idx = -1;
e6a9854b 782 continue;
8318d78a 783 }
e2ebc74d 784
fbd647b1 785 rate = &sband->bitrates[rc_rate->idx];
e6a9854b
JB		 786
787 /* set up short preamble */
788 if (short_preamble &&
789 rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
fbd647b1 790 rc_rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
e6a9854b
JB		 791
792 /* set up G protection */
793 if (!rts && tx->sdata->vif.bss_conf.use_cts_prot &&
794 rate->flags & IEEE80211_RATE_ERP_G)
fbd647b1 795 rc_rate->flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
e2ebc74d
JB		 796 }
797
e6a9854b
JB		 798 return TX_CONTINUE;
799}
800
f591fa5d
JB		 801static ieee80211_tx_result debug_noinline
802ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
803{
804 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
805 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
806 u16 *seq;
807 u8 *qc;
808 int tid;
809
25d834e1
JB		 810 /*
811 * Packet injection may want to control the sequence
812 * number, if we have no matching interface then we
813 * neither assign one ourselves nor ask the driver to.
814 */
5061b0c2 815 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 816 return TX_CONTINUE;
817
f591fa5d
JB		 818 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
819 return TX_CONTINUE;
820
821 if (ieee80211_hdrlen(hdr->frame_control) < 24)
822 return TX_CONTINUE;
823
49a59543
JB		 824 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
825 return TX_CONTINUE;
826
94778280
JB		 827 /*
828 * Anything but QoS data that has a sequence number field
829 * (is long enough) gets a sequence number from the global
830 * counter.
831 */
f591fa5d 832 if (!ieee80211_is_data_qos(hdr->frame_control)) {
94778280 833 /* driver should assign sequence number */
f591fa5d 834 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 835 /* for pure STA mode without beacons, we can do it */
836 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
837 tx->sdata->sequence_number += 0x10;
f591fa5d
JB		 838 return TX_CONTINUE;
839 }
840
841 /*
842 * This should be true for injected/management frames only, for
843 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
844 * above since they are not QoS-data frames.
845 */
846 if (!tx->sta)
847 return TX_CONTINUE;
848
849 /* include per-STA, per-TID sequence counter */
850
851 qc = ieee80211_get_qos_ctl(hdr);
852 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
853 seq = &tx->sta->tid_seq[tid];
854
855 hdr->seq_ctrl = cpu_to_le16(*seq);
856
857 /* Increase the sequence number. */
858 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
859
860 return TX_CONTINUE;
861}
862
252b86c4 863static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 864 struct sk_buff *skb, int hdrlen,
865 int frag_threshold)
866{
252b86c4 867 struct ieee80211_local *local = tx->local;
a1a3fcec 868 struct ieee80211_tx_info *info;
252b86c4 869 struct sk_buff *tmp;
2de8e0d9
JB		 870 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
871 int pos = hdrlen + per_fragm;
872 int rem = skb->len - hdrlen - per_fragm;
873
874 if (WARN_ON(rem < 0))
875 return -EINVAL;
876
252b86c4
JB		 877 /* first fragment was already added to queue by caller */
878
2de8e0d9
JB		 879 while (rem) {
880 int fraglen = per_fragm;
881
882 if (fraglen > rem)
883 fraglen = rem;
884 rem -= fraglen;
885 tmp = dev_alloc_skb(local->tx_headroom +
886 frag_threshold +
887 IEEE80211_ENCRYPT_HEADROOM +
888 IEEE80211_ENCRYPT_TAILROOM);
889 if (!tmp)
890 return -ENOMEM;
252b86c4
JB		 891
892 __skb_queue_tail(&tx->skbs, tmp);
893
2de8e0d9
JB		 894 skb_reserve(tmp, local->tx_headroom +
895 IEEE80211_ENCRYPT_HEADROOM);
896 /* copy control information */
897 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 898
899 info = IEEE80211_SKB_CB(tmp);
900 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
901 IEEE80211_TX_CTL_FIRST_FRAGMENT);
902
903 if (rem)
904 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
905
2de8e0d9
JB		 906 skb_copy_queue_mapping(tmp, skb);
907 tmp->priority = skb->priority;
2de8e0d9 908 tmp->dev = skb->dev;
2de8e0d9
JB		 909
910 /* copy header and data */
911 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
912 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
913
914 pos += fraglen;
915 }
916
252b86c4 917 /* adjust first fragment's length */
2de8e0d9
JB		 918 skb->len = hdrlen + per_fragm;
919 return 0;
920}
921
d9e8a70f 922static ieee80211_tx_result debug_noinline
e2454948
JB		 923ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
924{
2de8e0d9
JB		 925 struct sk_buff *skb = tx->skb;
926 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
927 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 928 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 929 int hdrlen;
930 int fragnum;
e2454948 931
252b86c4
JB		 932 /* no matter what happens, tx->skb moves to tx->skbs */
933 __skb_queue_tail(&tx->skbs, skb);
934 tx->skb = NULL;
935
a26eb27a
JB		 936 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
937 return TX_CONTINUE;
938
939 if (tx->local->ops->set_frag_threshold)
e2454948
JB		 940 return TX_CONTINUE;
941
eefce91a
JB		 942 /*
943 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 944 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 945 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 946 */
8b30b1fe 947 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 948 return TX_DROP;
949
065e9605 950 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 951
a26eb27a 952 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 953 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 954 return TX_DROP;
e6a9854b 955
2de8e0d9
JB		 956 /*
957 * Now fragment the frame. This will allocate all the fragments and
958 * chain them (using skb as the first fragment) to skb->next.
959 * During transmission, we will remove the successfully transmitted
960 * fragments from this list. When the low-level driver rejects one
961 * of the fragments then we will simply pretend to accept the skb
962 * but store it away as pending.
963 */
252b86c4 964 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 965 return TX_DROP;
e6a9854b 966
2de8e0d9
JB		 967 /* update duration/seq/flags of fragments */
968 fragnum = 0;
252b86c4
JB		 969
970 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 971 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 972
2de8e0d9
JB		 973 hdr = (void *)skb->data;
974 info = IEEE80211_SKB_CB(skb);
e6a9854b 975
252b86c4 976 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 977 hdr->frame_control |= morefrags;
e6a9854b
JB		 978 /*
979 * No multi-rate retries for fragmented frames, that
980 * would completely throw off the NAV at other STAs.
981 */
982 info->control.rates[1].idx = -1;
983 info->control.rates[2].idx = -1;
984 info->control.rates[3].idx = -1;
e3e1a0bc 985 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 986 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 987 } else {
988 hdr->frame_control &= ~morefrags;
e6a9854b 989 }
2de8e0d9
JB		 990 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
991 fragnum++;
252b86c4 992 }
e2ebc74d 993
9ae54c84 994 return TX_CONTINUE;
e2ebc74d
JB		 995}
996
feff1f2f
JB		 997static ieee80211_tx_result debug_noinline
998ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
999{
252b86c4 1000 struct sk_buff *skb;
560d2682 1001 int ac = -1;
feff1f2f
JB		 1002
1003 if (!tx->sta)
1004 return TX_CONTINUE;
1005
252b86c4 1006 skb_queue_walk(&tx->skbs, skb) {
560d2682 1007 ac = skb_get_queue_mapping(skb);
feff1f2f 1008 tx->sta->tx_fragments++;
560d2682 1009 tx->sta->tx_bytes[ac] += skb->len;
252b86c4 1010 }
560d2682
JB		 1011 if (ac >= 0)
1012 tx->sta->tx_packets[ac]++;
feff1f2f
JB		 1013
1014 return TX_CONTINUE;
1015}
1016
d9e8a70f 1017static ieee80211_tx_result debug_noinline
e2454948
JB		 1018ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1019{
1020 if (!tx->key)
1021 return TX_CONTINUE;
1022
97359d12
JB		 1023 switch (tx->key->conf.cipher) {
1024 case WLAN_CIPHER_SUITE_WEP40:
1025 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1026 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1027 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1028 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1029 case WLAN_CIPHER_SUITE_CCMP:
e2454948 1030 return ieee80211_crypto_ccmp_encrypt(tx);
97359d12 1031 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1032 return ieee80211_crypto_aes_cmac_encrypt(tx);
3ffc2a90 1033 default:
d32a1028 1034 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1035 }
1036
e2454948
JB		 1037 return TX_DROP;
1038}
1039
d9e8a70f 1040static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1041ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1042{
252b86c4 1043 struct sk_buff *skb;
2de8e0d9
JB		 1044 struct ieee80211_hdr *hdr;
1045 int next_len;
1046 bool group_addr;
03f93c3d 1047
252b86c4 1048 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1049 hdr = (void *) skb->data;
7e0aae47
JM		 1050 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1051 break; /* must not overwrite AID */
252b86c4
JB		 1052 if (!skb_queue_is_last(&tx->skbs, skb)) {
1053 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1054 next_len = next->len;
1055 } else
1056 next_len = 0;
2de8e0d9 1057 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1058
2de8e0d9 1059 hdr->duration_id =
252b86c4
JB		 1060 ieee80211_duration(tx, skb, group_addr, next_len);
1061 }
03f93c3d
JB		 1062
1063 return TX_CONTINUE;
1064}
1065
e2ebc74d
JB		 1066/* actual transmit path */
1067
a622ab72
JB		 1068static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1069 struct sk_buff *skb,
1070 struct ieee80211_tx_info *info,
1071 struct tid_ampdu_tx *tid_tx,
1072 int tid)
1073{
1074 bool queued = false;
285fa695 1075 bool reset_agg_timer = false;
aa454580 1076 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1077
1078 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1079 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1080 reset_agg_timer = true;
0ab33703
JB		 1081 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1082 /*
1083 * nothing -- this aggregation session is being started
1084 * but that might still fail with the driver
1085 */
a622ab72
JB		 1086 } else {
1087 spin_lock(&tx->sta->lock);
1088 /*
1089 * Need to re-check now, because we may get here
1090 *
1091 * 1) in the window during which the setup is actually
1092 * already done, but not marked yet because not all
1093 * packets are spliced over to the driver pending
1094 * queue yet -- if this happened we acquire the lock
1095 * either before or after the splice happens, but
1096 * need to recheck which of these cases happened.
1097 *
1098 * 2) during session teardown, if the OPERATIONAL bit
1099 * was cleared due to the teardown but the pointer
1100 * hasn't been assigned NULL yet (or we loaded it
1101 * before it was assigned) -- in this case it may
1102 * now be NULL which means we should just let the
1103 * packet pass through because splicing the frames
1104 * back is already done.
1105 */
40b275b6 1106 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1107
1108 if (!tid_tx) {
1109 /* do nothing, let packet pass through */
1110 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1111 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1112 reset_agg_timer = true;
a622ab72
JB		 1113 } else {
1114 queued = true;
1115 info->control.vif = &tx->sdata->vif;
1116 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1117 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1118 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1119 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1120 }
1121 spin_unlock(&tx->sta->lock);
aa454580
HS		 1122
1123 if (purge_skb)
c3e7724b 1124 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1125 }
1126
285fa695
NM		 1127 /* reset session timer */
1128 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1129 tid_tx->last_tx = jiffies;
285fa695 1130
a622ab72
JB		 1131 return queued;
1132}
1133
58d4185e
JB		 1134/*
1135 * initialises @tx
1136 */
9ae54c84 1137static ieee80211_tx_result
3b8d81e0
JB		 1138ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1139 struct ieee80211_tx_data *tx,
1140 struct sk_buff *skb)
e2ebc74d 1141{
3b8d81e0 1142 struct ieee80211_local *local = sdata->local;
58d4185e 1143 struct ieee80211_hdr *hdr;
e039fa4a 1144 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1145 int tid;
a622ab72 1146 u8 *qc;
e2ebc74d
JB		 1147
1148 memset(tx, 0, sizeof(*tx));
1149 tx->skb = skb;
e2ebc74d 1150 tx->local = local;
3b8d81e0 1151 tx->sdata = sdata;
252b86c4 1152 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1153
cd8ffc80
JB		 1154 /*
1155 * If this flag is set to true anywhere, and we get here,
1156 * we are doing the needed processing, so remove the flag
1157 * now.
1158 */
1159 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1160
58d4185e
JB		 1161 hdr = (struct ieee80211_hdr *) skb->data;
1162
3f0e0b22 1163 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
f14543ee 1164 tx->sta = rcu_dereference(sdata->u.vlan.sta);
3f0e0b22
FF		 1165 if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
1166 return TX_DROP;
66f2c99a
FF		 1167 } else if (info->flags & IEEE80211_TX_CTL_INJECTED ||
1168 tx->sdata->control_port_protocol == tx->skb->protocol) {
b4d57adb 1169 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
3f0e0b22 1170 }
f14543ee 1171 if (!tx->sta)
abe60632 1172 tx->sta = sta_info_get(sdata, hdr->addr1);
58d4185e 1173
cd8ffc80 1174 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1175 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
edf6b784
AN		 1176 (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) &&
1177 !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1178 struct tid_ampdu_tx *tid_tx;
1179
8b30b1fe
S		 1180 qc = ieee80211_get_qos_ctl(hdr);
1181 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1182
a622ab72
JB		 1183 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1184 if (tid_tx) {
1185 bool queued;
cd8ffc80 1186
a622ab72
JB		 1187 queued = ieee80211_tx_prep_agg(tx, skb, info,
1188 tid_tx, tid);
1189
1190 if (unlikely(queued))
1191 return TX_QUEUED;
1192 }
8b30b1fe
S		 1193 }
1194
badffb72 1195 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1196 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1197 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1198 } else
5cf121c3 1199 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1200
a26eb27a
JB		 1201 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1202 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1203 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1204 info->flags & IEEE80211_TX_CTL_AMPDU)
1205 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1206 }
1207
e2ebc74d 1208 if (!tx->sta)
e039fa4a 1209 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
c2c98fde 1210 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
e039fa4a 1211 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
58d4185e 1212
e039fa4a 1213 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1214
9ae54c84 1215 return TX_CONTINUE;
e2ebc74d
JB		 1216}
1217
11127e91
JB		 1218static bool ieee80211_tx_frags(struct ieee80211_local *local,
1219 struct ieee80211_vif *vif,
1220 struct ieee80211_sta *sta,
1221 struct sk_buff_head *skbs,
1222 bool txpending)
e2ebc74d 1223{
36323f81 1224 struct ieee80211_tx_control control;
252b86c4 1225 struct sk_buff *skb, *tmp;
3b8d81e0 1226 unsigned long flags;
e2ebc74d 1227
252b86c4 1228 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1229 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1230 int q = info->hw_queue;
1231
1232#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1233 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1234 __skb_unlink(skb, skbs);
c3e7724b 1235 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1236 continue;
1237 }
1238#endif
3b8d81e0
JB		 1239
1240 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1241 if (local->queue_stop_reasons[q] ||
7bb45683 1242 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1243 if (unlikely(info->flags &
a7679ed5
SF		 1244 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1245 if (local->queue_stop_reasons[q] &
1246 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1247 /*
1248 * Drop off-channel frames if queues
1249 * are stopped for any reason other
1250 * than off-channel operation. Never
1251 * queue them.
1252 */
1253 spin_unlock_irqrestore(
1254 &local->queue_stop_reason_lock,
1255 flags);
1256 ieee80211_purge_tx_queue(&local->hw,
1257 skbs);
1258 return true;
1259 }
1260 } else {
1261
6c17b77b 1262 /*
a7679ed5
SF		 1263 * Since queue is stopped, queue up frames for
1264 * later transmission from the tx-pending
1265 * tasklet when the queue is woken again.
6c17b77b 1266 */
a7679ed5
SF		 1267 if (txpending)
1268 skb_queue_splice_init(skbs,
1269 &local->pending[q]);
1270 else
1271 skb_queue_splice_tail_init(skbs,
1272 &local->pending[q]);
1273
1274 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1275 flags);
1276 return false;
6c17b77b 1277 }
7bb45683 1278 }
3b8d81e0 1279 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1280
11127e91 1281 info->control.vif = vif;
36323f81 1282 control.sta = sta;
f0e72851 1283
11127e91 1284 __skb_unlink(skb, skbs);
36323f81 1285 drv_tx(local, &control, skb);
11127e91 1286 }
5061b0c2 1287
11127e91
JB		 1288 return true;
1289}
1290
1291/*
1292 * Returns false if the frame couldn't be transmitted but was queued instead.
1293 */
1294static bool __ieee80211_tx(struct ieee80211_local *local,
1295 struct sk_buff_head *skbs, int led_len,
1296 struct sta_info *sta, bool txpending)
1297{
1298 struct ieee80211_tx_info *info;
1299 struct ieee80211_sub_if_data *sdata;
1300 struct ieee80211_vif *vif;
1301 struct ieee80211_sta *pubsta;
1302 struct sk_buff *skb;
1303 bool result = true;
1304 __le16 fc;
5061b0c2 1305
11127e91
JB		 1306 if (WARN_ON(skb_queue_empty(skbs)))
1307 return true;
ec25acc4 1308
11127e91
JB		 1309 skb = skb_peek(skbs);
1310 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1311 info = IEEE80211_SKB_CB(skb);
1312 sdata = vif_to_sdata(info->control.vif);
1313 if (sta && !sta->uploaded)
1314 sta = NULL;
1315
1316 if (sta)
1317 pubsta = &sta->sta;
1318 else
1319 pubsta = NULL;
1320
1321 switch (sdata->vif.type) {
1322 case NL80211_IFTYPE_MONITOR:
4b6f1dd6 1323 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1324 if (sdata) {
4b6f1dd6 1325 vif = &sdata->vif;
3a25a8c8
JB		 1326 info->hw_queue =
1327 vif->hw_queue[skb_get_queue_mapping(skb)];
1328 } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
1329 dev_kfree_skb(skb);
1330 return true;
1331 } else
4b6f1dd6 1332 vif = NULL;
11127e91
JB		 1333 break;
1334 case NL80211_IFTYPE_AP_VLAN:
1335 sdata = container_of(sdata->bss,
1336 struct ieee80211_sub_if_data, u.ap);
1337 /* fall through */
1338 default:
1339 vif = &sdata->vif;
1340 break;
e2ebc74d 1341 }
2de8e0d9 1342
cb831b53
JB		 1343 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1344 txpending);
11127e91 1345
74e4dbfd
JB		 1346 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1347 ieee80211_led_tx(local, 1);
1348
4db4e0a1 1349 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1350
11127e91 1351 return result;
e2ebc74d
JB		 1352}
1353
97b045d6
JB		 1354/*
1355 * Invoke TX handlers, return 0 on success and non-zero if the
1356 * frame was dropped or queued.
1357 */
1358static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1359{
252b86c4 1360 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
97b045d6 1361 ieee80211_tx_result res = TX_DROP;
97b045d6 1362
9aa4aee3
JB		 1363#define CALL_TXH(txh) \
1364 do { \
1365 res = txh(tx); \
1366 if (res != TX_CONTINUE) \
1367 goto txh_done; \
1368 } while (0)
1369
5c1b98a5 1370 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1371 CALL_TXH(ieee80211_tx_h_check_assoc);
1372 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1373 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1374 CALL_TXH(ieee80211_tx_h_select_key);
af65cd96
JB		 1375 if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
1376 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1377
aa5b5492
JB		 1378 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1379 __skb_queue_tail(&tx->skbs, tx->skb);
1380 tx->skb = NULL;
c6fcf6bc 1381 goto txh_done;
aa5b5492 1382 }
c6fcf6bc
JB		 1383
1384 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1385 CALL_TXH(ieee80211_tx_h_sequence);
1386 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1387 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1388 CALL_TXH(ieee80211_tx_h_stats);
1389 CALL_TXH(ieee80211_tx_h_encrypt);
8fd369ee
AN		 1390 if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
1391 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1392#undef CALL_TXH
97b045d6 1393
d9e8a70f 1394 txh_done:
97b045d6 1395 if (unlikely(res == TX_DROP)) {
5479d0e7 1396 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1397 if (tx->skb)
c3e7724b 1398 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1399 else
1f98ab7f 1400 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1401 return -1;
1402 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1403 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1404 return -1;
1405 }
1406
1407 return 0;
1408}
1409
7bb45683
JB		 1410/*
1411 * Returns false if the frame couldn't be transmitted but was queued instead.
1412 */
1413static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
55de908a
JB		 1414 struct sk_buff *skb, bool txpending,
1415 enum ieee80211_band band)
e2ebc74d 1416{
3b8d81e0 1417 struct ieee80211_local *local = sdata->local;
5cf121c3 1418 struct ieee80211_tx_data tx;
97b045d6 1419 ieee80211_tx_result res_prepare;
e039fa4a 1420 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1421 bool result = true;
74e4dbfd 1422 int led_len;
e2ebc74d 1423
e2ebc74d
JB		 1424 if (unlikely(skb->len < 10)) {
1425 dev_kfree_skb(skb);
7bb45683 1426 return true;
e2ebc74d
JB		 1427 }
1428
58d4185e 1429 /* initialises tx */
74e4dbfd 1430 led_len = skb->len;
3b8d81e0 1431 res_prepare = ieee80211_tx_prepare(sdata, &tx, skb);
e2ebc74d 1432
cd8ffc80 1433 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1434 ieee80211_free_txskb(&local->hw, skb);
55de908a 1435 return true;
cd8ffc80 1436 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1437 return true;
e2ebc74d
JB		 1438 }
1439
55de908a 1440 info->band = band;
e2ebc74d 1441
3a25a8c8
JB		 1442 /* set up hw_queue value early */
1443 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1444 !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
1445 info->hw_queue =
1446 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1447
7bb45683 1448 if (!invoke_tx_handlers(&tx))
74e4dbfd
JB		 1449 result = __ieee80211_tx(local, &tx.skbs, led_len,
1450 tx.sta, txpending);
55de908a 1451
7bb45683 1452 return result;
e2ebc74d
JB		 1453}
1454
1455/* device xmit handlers */
1456
3bff1865 1457static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1458 struct sk_buff *skb,
1459 int head_need, bool may_encrypt)
1460{
3bff1865 1461 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1462 int tail_need = 0;
1463
3bff1865 1464 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1465 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1466 tail_need -= skb_tailroom(skb);
1467 tail_need = max_t(int, tail_need, 0);
1468 }
1469
fc7c976d 1470 if (skb_cloned(skb))
23c0752a 1471 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1472 else if (head_need || tail_need)
23c0752a 1473 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1474 else
1475 return 0;
23c0752a
JB		 1476
1477 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1478 wiphy_debug(local->hw.wiphy,
1479 "failed to reallocate TX buffer\n");
23c0752a
JB		 1480 return -ENOMEM;
1481 }
1482
23c0752a
JB		 1483 return 0;
1484}
1485
55de908a
JB		 1486void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1487 enum ieee80211_band band)
e2ebc74d 1488{
3b8d81e0 1489 struct ieee80211_local *local = sdata->local;
e039fa4a 1490 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1491 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1492 int headroom;
23c0752a 1493 bool may_encrypt;
e2ebc74d 1494
3b8d81e0 1495 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1496
3b8d81e0 1497 headroom = local->tx_headroom;
23c0752a
JB		 1498 if (may_encrypt)
1499 headroom += IEEE80211_ENCRYPT_HEADROOM;
1500 headroom -= skb_headroom(skb);
1501 headroom = max_t(int, 0, headroom);
1502
3bff1865 1503 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1504 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1505 return;
e2ebc74d
JB		 1506 }
1507
740c1aa3 1508 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1509 info->control.vif = &sdata->vif;
e2ebc74d 1510
3f52b7e3
MP		 1511 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1512 if (ieee80211_is_data(hdr->frame_control) &&
1513 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1514 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1515 return; /* skb queued: don't free */
1516 } else {
1517 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1518 }
98aed9fd 1519 }
cca89496 1520
2154c81c 1521 ieee80211_set_qos_hdr(sdata, skb);
55de908a 1522 ieee80211_tx(sdata, skb, false, band);
e2ebc74d
JB		 1523}
1524
73b9f03a
JB		 1525static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb)
1526{
1527 struct ieee80211_radiotap_iterator iterator;
1528 struct ieee80211_radiotap_header *rthdr =
1529 (struct ieee80211_radiotap_header *) skb->data;
1530 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1531 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1532 NULL);
1533 u16 txflags;
1534
1535 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1536 IEEE80211_TX_CTL_DONTFRAG;
1537
1538 /*
1539 * for every radiotap entry that is present
1540 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1541 * entries present, or -EINVAL on error)
1542 */
1543
1544 while (!ret) {
1545 ret = ieee80211_radiotap_iterator_next(&iterator);
1546
1547 if (ret)
1548 continue;
1549
1550 /* see if this argument is something we can use */
1551 switch (iterator.this_arg_index) {
1552 /*
1553 * You must take care when dereferencing iterator.this_arg
1554 * for multibyte types... the pointer is not aligned. Use
1555 * get_unaligned((type *)iterator.this_arg) to dereference
1556 * iterator.this_arg for type "type" safely on all arches.
1557 */
1558 case IEEE80211_RADIOTAP_FLAGS:
1559 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1560 /*
1561 * this indicates that the skb we have been
1562 * handed has the 32-bit FCS CRC at the end...
1563 * we should react to that by snipping it off
1564 * because it will be recomputed and added
1565 * on transmission
1566 */
1567 if (skb->len < (iterator._max_length + FCS_LEN))
1568 return false;
1569
1570 skb_trim(skb, skb->len - FCS_LEN);
1571 }
1572 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1573 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1574 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1575 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1576 break;
1577
1578 case IEEE80211_RADIOTAP_TX_FLAGS:
1579 txflags = get_unaligned_le16(iterator.this_arg);
1580 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1581 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1582 break;
1583
1584 /*
1585 * Please update the file
1586 * Documentation/networking/mac80211-injection.txt
1587 * when parsing new fields here.
1588 */
1589
1590 default:
1591 break;
1592 }
1593 }
1594
1595 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
1596 return false;
1597
1598 /*
1599 * remove the radiotap header
1600 * iterator->_max_length was sanity-checked against
1601 * skb->len by iterator init
1602 */
1603 skb_pull(skb, iterator._max_length);
1604
1605 return true;
1606}
1607
d0cf9c0d
SH		 1608netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1609 struct net_device *dev)
e2ebc74d
JB		 1610{
1611 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a
JB		 1612 struct ieee80211_chanctx_conf *chanctx_conf;
1613 struct ieee80211_channel *chan;
e2ebc74d
JB		 1614 struct ieee80211_radiotap_header *prthdr =
1615 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 1616 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 1617 struct ieee80211_hdr *hdr;
5d9cf4a5 1618 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
9b8a74e3 1619 u16 len_rthdr;
5d9cf4a5 1620 int hdrlen;
e2ebc74d 1621
9b8a74e3
AG		 1622 /* check for not even having the fixed radiotap header part */
1623 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
1624 goto fail; /* too short to be possibly valid */
1625
1626 /* is it a header version we can trust to find length from? */
1627 if (unlikely(prthdr->it_version))
1628 goto fail; /* only version 0 is supported */
1629
1630 /* then there must be a radiotap header with a length we can use */
1631 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1632
1633 /* does the skb contain enough to deliver on the alleged length? */
1634 if (unlikely(skb->len < len_rthdr))
1635 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 1636
e2ebc74d
JB		 1637 /*
1638 * fix up the pointers accounting for the radiotap
1639 * header still being in there. We are being given
1640 * a precooked IEEE80211 header so no need for
1641 * normal processing
1642 */
9b8a74e3 1643 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 1644 /*
9b8a74e3
AG		 1645 * these are just fixed to the end of the rt area since we
1646 * don't have any better information and at this point, nobody cares
e2ebc74d 1647 */
9b8a74e3
AG		 1648 skb_set_network_header(skb, len_rthdr);
1649 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 1650
5d9cf4a5
JB		 1651 if (skb->len < len_rthdr + 2)
1652 goto fail;
1653
1654 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1655 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1656
1657 if (skb->len < len_rthdr + hdrlen)
1658 goto fail;
1659
f75f5c6f
HS		 1660 /*
1661 * Initialize skb->protocol if the injected frame is a data frame
1662 * carrying a rfc1042 header
1663 */
5d9cf4a5
JB		 1664 if (ieee80211_is_data(hdr->frame_control) &&
1665 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
1666 u8 *payload = (u8 *)hdr + hdrlen;
1667
b203ca39 1668 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 1669 skb->protocol = cpu_to_be16((payload[6] << 8) |
1670 payload[7]);
f75f5c6f
HS		 1671 }
1672
3b8d81e0
JB		 1673 memset(info, 0, sizeof(*info));
1674
5d9cf4a5 1675 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 1676 IEEE80211_TX_CTL_INJECTED;
1677
1678 /* process and remove the injection radiotap header */
1679 if (!ieee80211_parse_tx_radiotap(skb))
1680 goto fail;
5d9cf4a5
JB		 1681
1682 rcu_read_lock();
1683
1684 /*
1685 * We process outgoing injected frames that have a local address
1686 * we handle as though they are non-injected frames.
1687 * This code here isn't entirely correct, the local MAC address
1688 * isn't always enough to find the interface to use; for proper
1689 * VLAN/WDS support we will need a different mechanism (which
1690 * likely isn't going to be monitor interfaces).
1691 */
1692 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1693
1694 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
1695 if (!ieee80211_sdata_running(tmp_sdata))
1696 continue;
1697 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1698 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1699 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
1700 continue;
b203ca39 1701 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 1702 sdata = tmp_sdata;
1703 break;
1704 }
1705 }
7351c6bd 1706
55de908a
JB		 1707 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1708 if (!chanctx_conf) {
1709 tmp_sdata = rcu_dereference(local->monitor_sdata);
1710 if (tmp_sdata)
1711 chanctx_conf =
1712 rcu_dereference(tmp_sdata->vif.chanctx_conf);
1713 }
55de908a 1714
b4a7ff75
FF		 1715 if (chanctx_conf)
1716 chan = chanctx_conf->def.chan;
1717 else if (!local->use_chanctx)
675a0b04 1718 chan = local->_oper_chandef.chan;
b4a7ff75
FF		 1719 else
1720 goto fail_rcu;
55de908a
JB		 1721
1722 /*
1723 * Frame injection is not allowed if beaconing is not allowed
1724 * or if we need radar detection. Beaconing is usually not allowed when
1725 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1726 * Passive scan is also used in world regulatory domains where
1727 * your country is not known and as such it should be treated as
1728 * NO TX unless the channel is explicitly allowed in which case
1729 * your current regulatory domain would not have the passive scan
1730 * flag.
1731 *
1732 * Since AP mode uses monitor interfaces to inject/TX management
1733 * frames we can make AP mode the exception to this rule once it
1734 * supports radar detection as its implementation can deal with
1735 * radar detection by itself. We can do that later by adding a
1736 * monitor flag interfaces used for AP support.
1737 */
1738 if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
1739 IEEE80211_CHAN_PASSIVE_SCAN)))
1740 goto fail_rcu;
1741
1742 ieee80211_xmit(sdata, skb, chan->band);
5d9cf4a5
JB		 1743 rcu_read_unlock();
1744
e2ebc74d 1745 return NETDEV_TX_OK;
9b8a74e3 1746
55de908a
JB		 1747fail_rcu:
1748 rcu_read_unlock();
9b8a74e3
AG		 1749fail:
1750 dev_kfree_skb(skb);
1751 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 1752}
1753
1754/**
1755 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1756 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1757 * @skb: packet to be sent
1758 * @dev: incoming interface
1759 *
1760 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1761 * not be freed, and caller is responsible for either retrying later or freeing
1762 * skb).
1763 *
1764 * This function takes in an Ethernet header and encapsulates it with suitable
1765 * IEEE 802.11 header based on which interface the packet is coming in. The
1766 * encapsulated packet will then be passed to master interface, wlan#.11, for
1767 * transmission (through low-level driver).
1768 */
d0cf9c0d
SH		 1769netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1770 struct net_device *dev)
e2ebc74d 1771{
133b8226
JB		 1772 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1773 struct ieee80211_local *local = sdata->local;
489ee919 1774 struct ieee80211_tx_info *info;
dcf33963 1775 int head_need;
065e9605
HH		 1776 u16 ethertype, hdrlen, meshhdrlen = 0;
1777 __le16 fc;
e2ebc74d 1778 struct ieee80211_hdr hdr;
ff67bb86 1779 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 1780 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 1781 const u8 *encaps_data;
1782 int encaps_len, skip_header_bytes;
e8bf9649 1783 int nh_pos, h_pos;
f14543ee 1784 struct sta_info *sta = NULL;
c2c98fde 1785 bool wme_sta = false, authorized = false, tdls_auth = false;
941c93cd 1786 bool tdls_direct = false;
a729cff8
JB		 1787 bool multicast;
1788 u32 info_flags = 0;
1789 u16 info_id = 0;
55de908a
JB		 1790 struct ieee80211_chanctx_conf *chanctx_conf;
1791 struct ieee80211_sub_if_data *ap_sdata;
1792 enum ieee80211_band band;
e2ebc74d 1793
dcf33963 1794 if (unlikely(skb->len < ETH_HLEN))
e2ebc74d 1795 goto fail;
e2ebc74d 1796
e2ebc74d
JB		 1797 /* convert Ethernet header to proper 802.11 header (based on
1798 * operation mode) */
1799 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 1800 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 1801
55de908a
JB		 1802 rcu_read_lock();
1803
51fb61e7 1804 switch (sdata->vif.type) {
05c914fe 1805 case NL80211_IFTYPE_AP_VLAN:
9bc383de 1806 sta = rcu_dereference(sdata->u.vlan.sta);
f14543ee
FF		 1807 if (sta) {
1808 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1809 /* RA TA DA SA */
1810 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 1811 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 1812 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1813 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1814 hdrlen = 30;
c2c98fde
JB		 1815 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1816 wme_sta = test_sta_flag(sta, WLAN_STA_WME);
f14543ee 1817 }
55de908a
JB		 1818 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1819 u.ap);
1820 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
1821 if (!chanctx_conf)
1822 goto fail_rcu;
4bf88530 1823 band = chanctx_conf->def.chan->band;
f14543ee
FF		 1824 if (sta)
1825 break;
1826 /* fall through */
1827 case NL80211_IFTYPE_AP:
fe80123d
AB		 1828 if (sdata->vif.type == NL80211_IFTYPE_AP)
1829 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1830 if (!chanctx_conf)
1831 goto fail_rcu;
065e9605 1832 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 1833 /* DA BSSID SA */
1834 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 1835 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 1836 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
1837 hdrlen = 24;
4bf88530 1838 band = chanctx_conf->def.chan->band;
cf966838 1839 break;
05c914fe 1840 case NL80211_IFTYPE_WDS:
065e9605 1841 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 1842 /* RA TA DA SA */
1843 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 1844 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 1845 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1846 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1847 hdrlen = 30;
55de908a
JB		 1848 /*
1849 * This is the exception! WDS style interfaces are prohibited
1850 * when channel contexts are in used so this must be valid
1851 */
675a0b04 1852 band = local->hw.conf.chandef.chan->band;
cf966838 1853 break;
33b64eb2 1854#ifdef CONFIG_MAC80211_MESH
05c914fe 1855 case NL80211_IFTYPE_MESH_POINT:
472dbc45 1856 if (!sdata->u.mesh.mshcfg.dot11MeshTTL) {
e32f85f7 1857 /* Do not send frames with mesh_ttl == 0 */
472dbc45 1858 sdata->u.mesh.mshstats.dropped_frames_ttl++;
55de908a 1859 goto fail_rcu;
33b64eb2 1860 }
55de908a 1861
b8bacc18 1862 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 1863 struct sta_info *next_hop;
1864 bool mpp_lookup = true;
1865
bf7cd94d 1866 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 1867 if (mpath) {
1868 mpp_lookup = false;
1869 next_hop = rcu_dereference(mpath->next_hop);
1870 if (!next_hop ||
1871 !(mpath->flags & (MESH_PATH_ACTIVE |
1872 MESH_PATH_RESOLVING)))
1873 mpp_lookup = true;
1874 }
1875
1876 if (mpp_lookup)
bf7cd94d 1877 mppath = mpp_path_lookup(sdata, skb->data);
163df6cf
CYY		 1878
1879 if (mppath && mpath)
1880 mesh_path_del(mpath->sdata, mpath->dst);
b8bacc18 1881 }
79617dee 1882
f76b57b4 1883 /*
9d52501b
JF		 1884 * Use address extension if it is a packet from
1885 * another interface or if we know the destination
1886 * is being proxied by a portal (i.e. portal address
1887 * differs from proxied address)
f76b57b4 1888 */
b203ca39
JP		 1889 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
1890 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 1891 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
1892 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 1893 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
1894 NULL, NULL);
79617dee 1895 } else {
27f01124
TP		 1896 /* DS -> MBSS (802.11-2012 13.11.3.3).
1897 * For unicast with unknown forwarding information,
1898 * destination might be in the MBSS or if that fails
1899 * forwarded to another mesh gate. In either case
1900 * resolution will be handled in ieee80211_xmit(), so
1901 * leave the original DA. This also works for mcast */
1902 const u8 *mesh_da = skb->data;
1903
1904 if (mppath)
1905 mesh_da = mppath->mpp;
1906 else if (mpath)
1907 mesh_da = mpath->dst;
79617dee 1908
3c5772a5 1909 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 1910 mesh_da, sdata->vif.addr);
27f01124
TP		 1911 if (is_multicast_ether_addr(mesh_da))
1912 /* DA TA mSA AE:SA */
bf7cd94d
JB		 1913 meshhdrlen = ieee80211_new_mesh_header(
1914 sdata, &mesh_hdr,
1915 skb->data + ETH_ALEN, NULL);
3c5772a5 1916 else
27f01124 1917 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 1918 meshhdrlen = ieee80211_new_mesh_header(
1919 sdata, &mesh_hdr, skb->data,
1920 skb->data + ETH_ALEN);
79617dee 1921
79617dee 1922 }
55de908a
JB		 1923 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1924 if (!chanctx_conf)
1925 goto fail_rcu;
4bf88530 1926 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 1927 break;
1928#endif
05c914fe 1929 case NL80211_IFTYPE_STATION:
941c93cd 1930 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
c2c98fde
JB		 1931 bool tdls_peer = false;
1932
941c93cd 1933 sta = sta_info_get(sdata, skb->data);
c2c98fde
JB		 1934 if (sta) {
1935 authorized = test_sta_flag(sta,
1936 WLAN_STA_AUTHORIZED);
1937 wme_sta = test_sta_flag(sta, WLAN_STA_WME);
1938 tdls_peer = test_sta_flag(sta,
1939 WLAN_STA_TDLS_PEER);
1940 tdls_auth = test_sta_flag(sta,
1941 WLAN_STA_TDLS_PEER_AUTH);
1942 }
941c93cd
AN		 1943
1944 /*
1945 * If the TDLS link is enabled, send everything
1946 * directly. Otherwise, allow TDLS setup frames
1947 * to be transmitted indirectly.
1948 */
c2c98fde 1949 tdls_direct = tdls_peer && (tdls_auth ||
941c93cd
AN		 1950 !(ethertype == ETH_P_TDLS && skb->len > 14 &&
1951 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE));
1952 }
1953
1954 if (tdls_direct) {
1955 /* link during setup - throw out frames to peer */
dcf33963 1956 if (!tdls_auth)
55de908a 1957 goto fail_rcu;
941c93cd
AN		 1958
1959 /* DA SA BSSID */
1960 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1961 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1962 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
1963 hdrlen = 24;
1964 } else if (sdata->u.mgd.use_4addr &&
1965 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
1966 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
1967 IEEE80211_FCTL_TODS);
f14543ee 1968 /* RA TA DA SA */
941c93cd 1969 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 1970 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 1971 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1972 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1973 hdrlen = 30;
1974 } else {
1975 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
1976 /* BSSID SA DA */
941c93cd 1977 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 1978 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1979 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1980 hdrlen = 24;
1981 }
55de908a
JB		 1982 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1983 if (!chanctx_conf)
1984 goto fail_rcu;
4bf88530 1985 band = chanctx_conf->def.chan->band;
cf966838 1986 break;
05c914fe 1987 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 1988 /* DA SA BSSID */
1989 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1990 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 1991 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 1992 hdrlen = 24;
55de908a
JB		 1993 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1994 if (!chanctx_conf)
1995 goto fail_rcu;
4bf88530 1996 band = chanctx_conf->def.chan->band;
cf966838
JB		 1997 break;
1998 default:
55de908a 1999 goto fail_rcu;
e2ebc74d
JB		 2000 }
2001
7d185b8b
JB		 2002 /*
2003 * There's no need to try to look up the destination
2004 * if it is a multicast address (which can only happen
2005 * in AP mode)
2006 */
a729cff8
JB		 2007 multicast = is_multicast_ether_addr(hdr.addr1);
2008 if (!multicast) {
abe60632 2009 sta = sta_info_get(sdata, hdr.addr1);
c2c98fde
JB		 2010 if (sta) {
2011 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2012 wme_sta = test_sta_flag(sta, WLAN_STA_WME);
2013 }
e2ebc74d
JB		 2014 }
2015
4777be41
JC		 2016 /* For mesh, the use of the QoS header is mandatory */
2017 if (ieee80211_vif_is_mesh(&sdata->vif))
c2c98fde 2018 wme_sta = true;
4777be41 2019
3434fbd3 2020 /* receiver and we are QoS enabled, use a QoS type frame */
32c5057b 2021 if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) {
065e9605 2022 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2023 hdrlen += 2;
2024 }
2025
2026 /*
238814fd
JB		 2027 * Drop unicast frames to unauthorised stations unless they are
2028 * EAPOL frames from the local station.
ce3edf6d 2029 */
55182e4a
JB		 2030 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2031 !is_multicast_ether_addr(hdr.addr1) && !authorized &&
2032 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2033 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2034#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2035 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
e87cc472 2036 dev->name, hdr.addr1);
ce3edf6d
JB		 2037#endif
2038
2039 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2040
55de908a 2041 goto fail_rcu;
ce3edf6d
JB		 2042 }
2043
a729cff8
JB		 2044 if (unlikely(!multicast && skb->sk &&
2045 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
2046 struct sk_buff *orig_skb = skb;
2047
2048 skb = skb_clone(skb, GFP_ATOMIC);
2049 if (skb) {
2050 unsigned long flags;
9475af6e 2051 int id;
a729cff8
JB		 2052
2053 spin_lock_irqsave(&local->ack_status_lock, flags);
9475af6e
TH		 2054 id = idr_alloc(&local->ack_status_frames, orig_skb,
2055 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2056 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2057
9475af6e 2058 if (id >= 0) {
a729cff8
JB		 2059 info_id = id;
2060 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2061 } else if (skb_shared(skb)) {
2062 kfree_skb(orig_skb);
2063 } else {
2064 kfree_skb(skb);
2065 skb = orig_skb;
2066 }
2067 } else {
2068 /* couldn't clone -- lose tx status ... */
2069 skb = orig_skb;
2070 }
2071 }
2072
7e244707
HS		 2073 /*
2074 * If the skb is shared we need to obtain our own copy.
2075 */
2076 if (skb_shared(skb)) {
a729cff8
JB		 2077 struct sk_buff *tmp_skb = skb;
2078
2079 /* can't happen -- skb is a clone if info_id != 0 */
2080 WARN_ON(info_id);
2081
f8a0a781 2082 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2083 kfree_skb(tmp_skb);
2084
dcf33963 2085 if (!skb)
55de908a 2086 goto fail_rcu;
7e244707
HS		 2087 }
2088
065e9605 2089 hdr.frame_control = fc;
e2ebc74d
JB		 2090 hdr.duration_id = 0;
2091 hdr.seq_ctrl = 0;
2092
2093 skip_header_bytes = ETH_HLEN;
2094 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2095 encaps_data = bridge_tunnel_header;
2096 encaps_len = sizeof(bridge_tunnel_header);
2097 skip_header_bytes -= 2;
2098 } else if (ethertype >= 0x600) {
2099 encaps_data = rfc1042_header;
2100 encaps_len = sizeof(rfc1042_header);
2101 skip_header_bytes -= 2;
2102 } else {
2103 encaps_data = NULL;
2104 encaps_len = 0;
2105 }
2106
7e244707
HS		 2107 nh_pos = skb_network_header(skb) - skb->data;
2108 h_pos = skb_transport_header(skb) - skb->data;
2109
e2ebc74d
JB		 2110 skb_pull(skb, skip_header_bytes);
2111 nh_pos -= skip_header_bytes;
2112 h_pos -= skip_header_bytes;
2113
23c0752a 2114 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2115
23c0752a
JB		 2116 /*
2117 * So we need to modify the skb header and hence need a copy of
2118 * that. The head_need variable above doesn't, so far, include
2119 * the needed header space that we don't need right away. If we
2120 * can, then we don't reallocate right now but only after the
2121 * frame arrives at the master device (if it does...)
2122 *
2123 * If we cannot, however, then we will reallocate to include all
2124 * the ever needed space. Also, if we need to reallocate it anyway,
2125 * make it big enough for everything we may ever need.
2126 */
e2ebc74d 2127
3a5be7d4 2128 if (head_need > 0 || skb_cloned(skb)) {
23c0752a
JB		 2129 head_need += IEEE80211_ENCRYPT_HEADROOM;
2130 head_need += local->tx_headroom;
2131 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2132 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2133 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2134 skb = NULL;
55de908a 2135 goto fail_rcu;
c3e7724b 2136 }
e2ebc74d
JB		 2137 }
2138
2139 if (encaps_data) {
2140 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2141 nh_pos += encaps_len;
2142 h_pos += encaps_len;
2143 }
c29b9b9b 2144
e4ab7eb0 2145#ifdef CONFIG_MAC80211_MESH
33b64eb2
LCC		 2146 if (meshhdrlen > 0) {
2147 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2148 nh_pos += meshhdrlen;
2149 h_pos += meshhdrlen;
2150 }
e4ab7eb0 2151#endif
33b64eb2 2152
065e9605 2153 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2154 __le16 *qos_control;
2155
2156 qos_control = (__le16*) skb_push(skb, 2);
2157 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2158 /*
2159 * Maybe we could actually set some fields here, for now just
2160 * initialise to zero to indicate no special operation.
2161 */
2162 *qos_control = 0;
2163 } else
2164 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2165
e2ebc74d
JB		 2166 nh_pos += hdrlen;
2167 h_pos += hdrlen;
2168
68aae116
SH		 2169 dev->stats.tx_packets++;
2170 dev->stats.tx_bytes += skb->len;
e2ebc74d
JB		 2171
2172 /* Update skb pointers to various headers since this modified frame
2173 * is going to go through Linux networking code that may potentially
2174 * need things like pointer to IP header. */
2175 skb_set_mac_header(skb, 0);
2176 skb_set_network_header(skb, nh_pos);
2177 skb_set_transport_header(skb, h_pos);
2178
489ee919 2179 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2180 memset(info, 0, sizeof(*info));
2181
e2ebc74d 2182 dev->trans_start = jiffies;
a729cff8
JB		 2183
2184 info->flags = info_flags;
2185 info->ack_frame_id = info_id;
2186
55de908a
JB		 2187 ieee80211_xmit(sdata, skb, band);
2188 rcu_read_unlock();
e2ebc74d 2189
ec634fe3 2190 return NETDEV_TX_OK;
e2ebc74d 2191
55de908a
JB		 2192 fail_rcu:
2193 rcu_read_unlock();
e2ebc74d 2194 fail:
dcf33963
JB		 2195 dev_kfree_skb(skb);
2196 return NETDEV_TX_OK;
e2ebc74d
JB		 2197}
2198
e2ebc74d 2199
e2530083
JB		 2200/*
2201 * ieee80211_clear_tx_pending may not be called in a context where
2202 * it is possible that it packets could come in again.
2203 */
e2ebc74d
JB		 2204void ieee80211_clear_tx_pending(struct ieee80211_local *local)
2205{
1f98ab7f 2206 struct sk_buff *skb;
2de8e0d9 2207 int i;
e2ebc74d 2208
1f98ab7f
FF		 2209 for (i = 0; i < local->hw.queues; i++) {
2210 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
2211 ieee80211_free_txskb(&local->hw, skb);
2212 }
e2ebc74d
JB		 2213}
2214
7bb45683
JB		 2215/*
2216 * Returns false if the frame couldn't be transmitted but was queued instead,
2217 * which in this case means re-queued -- take as an indication to stop sending
2218 * more pending frames.
2219 */
cd8ffc80
JB		 2220static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
2221 struct sk_buff *skb)
2222{
2223 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2224 struct ieee80211_sub_if_data *sdata;
2225 struct sta_info *sta;
2226 struct ieee80211_hdr *hdr;
7bb45683 2227 bool result;
55de908a 2228 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 2229
5061b0c2 2230 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 2231
2232 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 2233 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2234 if (unlikely(!chanctx_conf)) {
2235 dev_kfree_skb(skb);
2236 return true;
2237 }
2238 result = ieee80211_tx(sdata, skb, true,
4bf88530 2239 chanctx_conf->def.chan->band);
cd8ffc80 2240 } else {
252b86c4
JB		 2241 struct sk_buff_head skbs;
2242
2243 __skb_queue_head_init(&skbs);
2244 __skb_queue_tail(&skbs, skb);
2245
cd8ffc80 2246 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 2247 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 2248
74e4dbfd 2249 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 2250 }
2251
cd8ffc80
JB		 2252 return result;
2253}
2254
e2530083 2255/*
3b8d81e0 2256 * Transmit all pending packets. Called from tasklet.
e2530083 2257 */
e2ebc74d
JB		 2258void ieee80211_tx_pending(unsigned long data)
2259{
2260 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 2261 unsigned long flags;
cd8ffc80 2262 int i;
3b8d81e0 2263 bool txok;
e2ebc74d 2264
f0e72851 2265 rcu_read_lock();
e2530083 2266
3b8d81e0 2267 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 2268 for (i = 0; i < local->hw.queues; i++) {
2269 /*
2270 * If queue is stopped by something other than due to pending
2271 * frames, or we have no pending frames, proceed to next queue.
2272 */
3b8d81e0 2273 if (local->queue_stop_reasons[i] ||
2a577d98 2274 skb_queue_empty(&local->pending[i]))
e2ebc74d 2275 continue;
e2530083 2276
2a577d98 2277 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 2278 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 2279 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 2280
a7bc376c 2281 if (WARN_ON(!info->control.vif)) {
c3e7724b 2282 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 2283 continue;
2284 }
2285
3b8d81e0
JB		 2286 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2287 flags);
2288
2289 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 2290 spin_lock_irqsave(&local->queue_stop_reason_lock,
2291 flags);
2292 if (!txok)
2a577d98 2293 break;
e2ebc74d 2294 }
7236fe29
JB		 2295
2296 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 2297 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 2298 }
3b8d81e0 2299 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 2300
f0e72851 2301 rcu_read_unlock();
e2ebc74d
JB		 2302}
2303
2304/* functions for drivers to get certain frames */
2305
eac70c13
MP		 2306static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
2307 struct ps_data *ps, struct sk_buff *skb)
e2ebc74d
JB		 2308{
2309 u8 *pos, *tim;
2310 int aid0 = 0;
2311 int i, have_bits = 0, n1, n2;
2312
2313 /* Generate bitmap for TIM only if there are any STAs in power save
2314 * mode. */
d012a605 2315 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 2316 /* in the hope that this is faster than
2317 * checking byte-for-byte */
d012a605 2318 have_bits = !bitmap_empty((unsigned long*)ps->tim,
e2ebc74d
JB		 2319 IEEE80211_MAX_AID+1);
2320
d012a605
MP		 2321 if (ps->dtim_count == 0)
2322 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
e2ebc74d 2323 else
d012a605 2324 ps->dtim_count--;
e2ebc74d
JB		 2325
2326 tim = pos = (u8 *) skb_put(skb, 6);
2327 *pos++ = WLAN_EID_TIM;
2328 *pos++ = 4;
d012a605 2329 *pos++ = ps->dtim_count;
8860020e 2330 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 2331
d012a605 2332 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 2333 aid0 = 1;
2334
d012a605 2335 ps->dtim_bc_mc = aid0 == 1;
512119b3 2336
e2ebc74d
JB		 2337 if (have_bits) {
2338 /* Find largest even number N1 so that bits numbered 1 through
2339 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2340 * (N2 + 1) x 8 through 2007 are 0. */
2341 n1 = 0;
2342 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 2343 if (ps->tim[i]) {
e2ebc74d
JB		 2344 n1 = i & 0xfe;
2345 break;
2346 }
2347 }
2348 n2 = n1;
2349 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 2350 if (ps->tim[i]) {
e2ebc74d
JB		 2351 n2 = i;
2352 break;
2353 }
2354 }
2355
2356 /* Bitmap control */
2357 *pos++ = n1 | aid0;
2358 /* Part Virt Bitmap */
5220da39 2359 skb_put(skb, n2 - n1);
d012a605 2360 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 2361
2362 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 2363 } else {
2364 *pos++ = aid0; /* Bitmap control */
2365 *pos++ = 0; /* Part Virt Bitmap */
2366 }
e2ebc74d
JB		 2367}
2368
eac70c13
MP		 2369static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
2370 struct ps_data *ps, struct sk_buff *skb)
2371{
2372 struct ieee80211_local *local = sdata->local;
2373
2374 /*
2375 * Not very nice, but we want to allow the driver to call
2376 * ieee80211_beacon_get() as a response to the set_tim()
2377 * callback. That, however, is already invoked under the
2378 * sta_lock to guarantee consistent and race-free update
2379 * of the tim bitmap in mac80211 and the driver.
2380 */
2381 if (local->tim_in_locked_section) {
2382 __ieee80211_beacon_add_tim(sdata, ps, skb);
2383 } else {
1b91731d 2384 spin_lock_bh(&local->tim_lock);
eac70c13 2385 __ieee80211_beacon_add_tim(sdata, ps, skb);
1b91731d 2386 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 2387 }
2388
2389 return 0;
2390}
2391
eddcbb94
JB		 2392struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
2393 struct ieee80211_vif *vif,
2394 u16 *tim_offset, u16 *tim_length)
e2ebc74d
JB		 2395{
2396 struct ieee80211_local *local = hw_to_local(hw);
9d139c81 2397 struct sk_buff *skb = NULL;
e039fa4a 2398 struct ieee80211_tx_info *info;
e2ebc74d 2399 struct ieee80211_sub_if_data *sdata = NULL;
55de908a 2400 enum ieee80211_band band;
e00cfce0 2401 struct ieee80211_tx_rate_control txrc;
55de908a 2402 struct ieee80211_chanctx_conf *chanctx_conf;
8318d78a 2403
5dfdaf58 2404 rcu_read_lock();
e2ebc74d 2405
32bfd35d 2406 sdata = vif_to_sdata(vif);
55de908a 2407 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 2408
55de908a 2409 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 2410 goto out;
2411
eddcbb94
JB		 2412 if (tim_offset)
2413 *tim_offset = 0;
2414 if (tim_length)
2415 *tim_length = 0;
2416
05c914fe 2417 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605
MP		 2418 struct ieee80211_if_ap *ap = &sdata->u.ap;
2419 struct beacon_data *beacon = rcu_dereference(ap->beacon);
2420
3ad97fbc 2421 if (beacon) {
902acc78
JB		 2422 /*
2423 * headroom, head length,
2424 * tail length and maximum TIM length
2425 */
2426 skb = dev_alloc_skb(local->tx_headroom +
2427 beacon->head_len +
2428 beacon->tail_len + 256);
2429 if (!skb)
2430 goto out;
33b64eb2 2431
902acc78
JB		 2432 skb_reserve(skb, local->tx_headroom);
2433 memcpy(skb_put(skb, beacon->head_len), beacon->head,
2434 beacon->head_len);
33b64eb2 2435
eac70c13 2436 ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
33b64eb2 2437
eddcbb94
JB		 2438 if (tim_offset)
2439 *tim_offset = beacon->head_len;
2440 if (tim_length)
2441 *tim_length = skb->len - beacon->head_len;
2442
902acc78
JB		 2443 if (beacon->tail)
2444 memcpy(skb_put(skb, beacon->tail_len),
2445 beacon->tail, beacon->tail_len);
9d139c81
JB		 2446 } else
2447 goto out;
05c914fe 2448 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 2449 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 2450 struct ieee80211_hdr *hdr;
c3ffeab4 2451 struct beacon_data *presp = rcu_dereference(ifibss->presp);
33b64eb2 2452
af8cdcd8 2453 if (!presp)
9d139c81
JB		 2454 goto out;
2455
c3ffeab4 2456 skb = dev_alloc_skb(local->tx_headroom + presp->head_len);
9d139c81
JB		 2457 if (!skb)
2458 goto out;
c3ffeab4
JB		 2459 skb_reserve(skb, local->tx_headroom);
2460 memcpy(skb_put(skb, presp->head_len), presp->head,
2461 presp->head_len);
9d139c81
JB		 2462
2463 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 2464 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2465 IEEE80211_STYPE_BEACON);
902acc78 2466 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 2467 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2b5e1967 2468 struct beacon_data *bcn = rcu_dereference(ifmsh->beacon);
472dbc45 2469
2b5e1967 2470 if (!bcn)
ac1bd846 2471 goto out;
ac1bd846 2472
dbf498fb
JC		 2473 if (ifmsh->sync_ops)
2474 ifmsh->sync_ops->adjust_tbtt(
2475 sdata);
2476
3b69a9c5 2477 skb = dev_alloc_skb(local->tx_headroom +
2b5e1967 2478 bcn->head_len +
3f52b7e3 2479 256 + /* TIM IE */
2b5e1967 2480 bcn->tail_len);
902acc78
JB		 2481 if (!skb)
2482 goto out;
2b5e1967
TP		 2483 skb_reserve(skb, local->tx_headroom);
2484 memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len);
2485 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb);
2486 memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len);
9d139c81
JB		 2487 } else {
2488 WARN_ON(1);
5dfdaf58 2489 goto out;
e2ebc74d
JB		 2490 }
2491
4bf88530 2492 band = chanctx_conf->def.chan->band;
55de908a 2493
e039fa4a
JB		 2494 info = IEEE80211_SKB_CB(skb);
2495
3b8d81e0 2496 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 2497 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 2498 info->band = band;
e00cfce0
JM		 2499
2500 memset(&txrc, 0, sizeof(txrc));
2501 txrc.hw = hw;
e31583cd 2502 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 2503 txrc.bss_conf = &sdata->vif.bss_conf;
2504 txrc.skb = skb;
2505 txrc.reported_rate.idx = -1;
37eb0b16 2506 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
e31583cd 2507 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
37eb0b16
JM		 2508 txrc.max_rate_idx = -1;
2509 else
2510 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
19468413
SW		 2511 memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band],
2512 sizeof(txrc.rate_idx_mcs_mask));
8f0729b1 2513 txrc.bss = true;
e00cfce0 2514 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 2515
2516 info->control.vif = vif;
f591fa5d 2517
a472e71b
JL		 2518 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
2519 IEEE80211_TX_CTL_ASSIGN_SEQ |
2520 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 2521 out:
5dfdaf58 2522 rcu_read_unlock();
e2ebc74d
JB		 2523 return skb;
2524}
eddcbb94 2525EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 2526
02945821
AN		 2527struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
2528 struct ieee80211_vif *vif)
2529{
2530 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 2531 struct sk_buff *skb = NULL;
2532 struct probe_resp *presp = NULL;
02945821
AN		 2533 struct ieee80211_hdr *hdr;
2534 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2535
2536 if (sdata->vif.type != NL80211_IFTYPE_AP)
2537 return NULL;
2538
2539 rcu_read_lock();
2540
2541 ap = &sdata->u.ap;
2542 presp = rcu_dereference(ap->probe_resp);
2543 if (!presp)
2544 goto out;
2545
aa7a0080 2546 skb = dev_alloc_skb(presp->len);
02945821
AN		 2547 if (!skb)
2548 goto out;
2549
aa7a0080
ES		 2550 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
2551
02945821
AN		 2552 hdr = (struct ieee80211_hdr *) skb->data;
2553 memset(hdr->addr1, 0, sizeof(hdr->addr1));
2554
2555out:
2556 rcu_read_unlock();
2557 return skb;
2558}
2559EXPORT_SYMBOL(ieee80211_proberesp_get);
2560
7044cc56
KV		 2561struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
2562 struct ieee80211_vif *vif)
2563{
2564 struct ieee80211_sub_if_data *sdata;
2565 struct ieee80211_if_managed *ifmgd;
2566 struct ieee80211_pspoll *pspoll;
2567 struct ieee80211_local *local;
2568 struct sk_buff *skb;
2569
2570 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2571 return NULL;
2572
2573 sdata = vif_to_sdata(vif);
2574 ifmgd = &sdata->u.mgd;
2575 local = sdata->local;
2576
2577 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 2578 if (!skb)
7044cc56 2579 return NULL;
d15b8459 2580
7044cc56
KV		 2581 skb_reserve(skb, local->hw.extra_tx_headroom);
2582
2583 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
2584 memset(pspoll, 0, sizeof(*pspoll));
2585 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
2586 IEEE80211_STYPE_PSPOLL);
2587 pspoll->aid = cpu_to_le16(ifmgd->aid);
2588
2589 /* aid in PS-Poll has its two MSBs each set to 1 */
2590 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
2591
2592 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
2593 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
2594
2595 return skb;
2596}
2597EXPORT_SYMBOL(ieee80211_pspoll_get);
2598
2599struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
2600 struct ieee80211_vif *vif)
2601{
2602 struct ieee80211_hdr_3addr *nullfunc;
2603 struct ieee80211_sub_if_data *sdata;
2604 struct ieee80211_if_managed *ifmgd;
2605 struct ieee80211_local *local;
2606 struct sk_buff *skb;
2607
2608 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2609 return NULL;
2610
2611 sdata = vif_to_sdata(vif);
2612 ifmgd = &sdata->u.mgd;
2613 local = sdata->local;
2614
2615 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 2616 if (!skb)
7044cc56 2617 return NULL;
d15b8459 2618
7044cc56
KV		 2619 skb_reserve(skb, local->hw.extra_tx_headroom);
2620
2621 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
2622 sizeof(*nullfunc));
2623 memset(nullfunc, 0, sizeof(*nullfunc));
2624 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
2625 IEEE80211_STYPE_NULLFUNC |
2626 IEEE80211_FCTL_TODS);
2627 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
2628 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
2629 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
2630
2631 return skb;
2632}
2633EXPORT_SYMBOL(ieee80211_nullfunc_get);
2634
05e54ea6
KV		 2635struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
2636 struct ieee80211_vif *vif,
2637 const u8 *ssid, size_t ssid_len,
b9a9ada1 2638 size_t tailroom)
05e54ea6
KV		 2639{
2640 struct ieee80211_sub_if_data *sdata;
2641 struct ieee80211_local *local;
2642 struct ieee80211_hdr_3addr *hdr;
2643 struct sk_buff *skb;
2644 size_t ie_ssid_len;
2645 u8 *pos;
2646
2647 sdata = vif_to_sdata(vif);
2648 local = sdata->local;
2649 ie_ssid_len = 2 + ssid_len;
2650
2651 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 2652 ie_ssid_len + tailroom);
d15b8459 2653 if (!skb)
05e54ea6 2654 return NULL;
05e54ea6
KV		 2655
2656 skb_reserve(skb, local->hw.extra_tx_headroom);
2657
2658 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
2659 memset(hdr, 0, sizeof(*hdr));
2660 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2661 IEEE80211_STYPE_PROBE_REQ);
e83e6541 2662 eth_broadcast_addr(hdr->addr1);
05e54ea6 2663 memcpy(hdr->addr2, vif->addr, ETH_ALEN);
e83e6541 2664 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 2665
2666 pos = skb_put(skb, ie_ssid_len);
2667 *pos++ = WLAN_EID_SSID;
2668 *pos++ = ssid_len;
88c868c4 2669 if (ssid_len)
05e54ea6
KV		 2670 memcpy(pos, ssid, ssid_len);
2671 pos += ssid_len;
2672
05e54ea6
KV		 2673 return skb;
2674}
2675EXPORT_SYMBOL(ieee80211_probereq_get);
2676
32bfd35d 2677void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 2678 const void *frame, size_t frame_len,
e039fa4a 2679 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 2680 struct ieee80211_rts *rts)
2681{
2682 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 2683
065e9605
HH		 2684 rts->frame_control =
2685 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 2686 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
2687 frame_txctl);
e2ebc74d
JB		 2688 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
2689 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
2690}
2691EXPORT_SYMBOL(ieee80211_rts_get);
2692
32bfd35d 2693void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 2694 const void *frame, size_t frame_len,
e039fa4a 2695 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 2696 struct ieee80211_cts *cts)
2697{
2698 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 2699
065e9605
HH		 2700 cts->frame_control =
2701 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 2702 cts->duration = ieee80211_ctstoself_duration(hw, vif,
2703 frame_len, frame_txctl);
e2ebc74d
JB		 2704 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
2705}
2706EXPORT_SYMBOL(ieee80211_ctstoself_get);
2707
2708struct sk_buff *
32bfd35d 2709ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 2710 struct ieee80211_vif *vif)
e2ebc74d
JB		 2711{
2712 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 2713 struct sk_buff *skb = NULL;
5cf121c3 2714 struct ieee80211_tx_data tx;
e2ebc74d 2715 struct ieee80211_sub_if_data *sdata;
d012a605 2716 struct ps_data *ps;
e039fa4a 2717 struct ieee80211_tx_info *info;
55de908a 2718 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 2719
32bfd35d 2720 sdata = vif_to_sdata(vif);
5dfdaf58 2721
5dfdaf58 2722 rcu_read_lock();
55de908a 2723 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 2724
d012a605
MP		 2725 if (!chanctx_conf)
2726 goto out;
2727
2728 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2729 struct beacon_data *beacon =
2730 rcu_dereference(sdata->u.ap.beacon);
2731
2732 if (!beacon || !beacon->head)
2733 goto out;
2734
2735 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 2736 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2737 ps = &sdata->u.mesh.ps;
d012a605 2738 } else {
747cf5e9 2739 goto out;
d012a605 2740 }
5dfdaf58 2741
d012a605 2742 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 2743 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 2744
e2ebc74d 2745 while (1) {
d012a605 2746 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 2747 if (!skb)
747cf5e9 2748 goto out;
e2ebc74d
JB		 2749 local->total_ps_buffered--;
2750
d012a605 2751 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 2752 struct ieee80211_hdr *hdr =
2753 (struct ieee80211_hdr *) skb->data;
2754 /* more buffered multicast/broadcast frames ==> set
2755 * MoreData flag in IEEE 802.11 header to inform PS
2756 * STAs */
2757 hdr->frame_control |=
2758 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2759 }
2760
7cbf9d01
MP		 2761 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2762 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
3b8d81e0 2763 if (!ieee80211_tx_prepare(sdata, &tx, skb))
e2ebc74d
JB		 2764 break;
2765 dev_kfree_skb_any(skb);
2766 }
e039fa4a
JB		 2767
2768 info = IEEE80211_SKB_CB(skb);
2769
5cf121c3 2770 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 2771 info->band = chanctx_conf->def.chan->band;
e2ebc74d 2772
97b045d6 2773 if (invoke_tx_handlers(&tx))
e2ebc74d 2774 skb = NULL;
97b045d6 2775 out:
d0709a65 2776 rcu_read_unlock();
e2ebc74d
JB		 2777
2778 return skb;
2779}
2780EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 2781
55de908a
JB		 2782void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
2783 struct sk_buff *skb, int tid,
2784 enum ieee80211_band band)
3b8d81e0 2785{
353d09c6 2786 int ac = ieee802_1d_to_ac[tid & 7];
3a25a8c8 2787
3b8d81e0
JB		 2788 skb_set_mac_header(skb, 0);
2789 skb_set_network_header(skb, 0);
2790 skb_set_transport_header(skb, 0);
2791
3a25a8c8 2792 skb_set_queue_mapping(skb, ac);
cf6bb79a 2793 skb->priority = tid;
cf0277e7 2794
89afe614
JB		 2795 skb->dev = sdata->dev;
2796
3d34deb6
JB		 2797 /*
2798 * The other path calling ieee80211_xmit is from the tasklet,
2799 * and while we can handle concurrent transmissions locking
2800 * requirements are that we do not come into tx with bhs on.
2801 */
2802 local_bh_disable();
55de908a 2803 ieee80211_xmit(sdata, skb, band);
3d34deb6 2804 local_bh_enable();
3b8d81e0 2805}
Linux 6.x block layer and io_uring tree(s)