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mac80211: allow drivers to set default uAPSD parameters
[GitHub/mt8127/android_kernel_alcatel_ttab.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
JB		 714 /*
715 * set up the RTS/CTS rate as the fastest basic rate
716 * that is not faster than the data rate
717 *
718 * XXX: Should this check all retry rates?
719 */
720 if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) {
721 s8 baserate = 0;
722
723 rate = &sband->bitrates[info->control.rates[0].idx];
724
725 for (i = 0; i < sband->n_bitrates; i++) {
726 /* must be a basic rate */
727 if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i)))
728 continue;
729 /* must not be faster than the data rate */
730 if (sband->bitrates[i].bitrate > rate->bitrate)
731 continue;
732 /* maximum */
733 if (sband->bitrates[baserate].bitrate <
734 sband->bitrates[i].bitrate)
735 baserate = i;
736 }
737
738 info->control.rts_cts_rate_idx = baserate;
7e9ed188
DD		 739 }
740
e6a9854b
JB		 741 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
742 /*
743 * make sure there's no valid rate following
744 * an invalid one, just in case drivers don't
745 * take the API seriously to stop at -1.
746 */
747 if (inval) {
748 info->control.rates[i].idx = -1;
749 continue;
750 }
751 if (info->control.rates[i].idx < 0) {
752 inval = true;
753 continue;
754 }
8318d78a 755
e6a9854b
JB		 756 /*
757 * For now assume MCS is already set up correctly, this
758 * needs to be fixed.
759 */
760 if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) {
761 WARN_ON(info->control.rates[i].idx > 76);
762 continue;
763 }
e2ebc74d 764
e6a9854b
JB		 765 /* set up RTS protection if desired */
766 if (rts)
767 info->control.rates[i].flags |=
768 IEEE80211_TX_RC_USE_RTS_CTS;
8318d78a 769
e6a9854b 770 /* RC is busted */
075cbc9e
S		 771 if (WARN_ON_ONCE(info->control.rates[i].idx >=
772 sband->n_bitrates)) {
e6a9854b
JB		 773 info->control.rates[i].idx = -1;
774 continue;
8318d78a 775 }
e2ebc74d 776
e6a9854b
JB		 777 rate = &sband->bitrates[info->control.rates[i].idx];
778
779 /* set up short preamble */
780 if (short_preamble &&
781 rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
782 info->control.rates[i].flags |=
783 IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
784
785 /* set up G protection */
786 if (!rts && tx->sdata->vif.bss_conf.use_cts_prot &&
787 rate->flags & IEEE80211_RATE_ERP_G)
788 info->control.rates[i].flags |=
789 IEEE80211_TX_RC_USE_CTS_PROTECT;
e2ebc74d
JB		 790 }
791
e6a9854b
JB		 792 return TX_CONTINUE;
793}
794
f591fa5d
JB		 795static ieee80211_tx_result debug_noinline
796ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
797{
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
800 u16 *seq;
801 u8 *qc;
802 int tid;
803
25d834e1
JB		 804 /*
805 * Packet injection may want to control the sequence
806 * number, if we have no matching interface then we
807 * neither assign one ourselves nor ask the driver to.
808 */
5061b0c2 809 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 810 return TX_CONTINUE;
811
f591fa5d
JB		 812 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
813 return TX_CONTINUE;
814
815 if (ieee80211_hdrlen(hdr->frame_control) < 24)
816 return TX_CONTINUE;
817
49a59543
JB		 818 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
819 return TX_CONTINUE;
820
94778280
JB		 821 /*
822 * Anything but QoS data that has a sequence number field
823 * (is long enough) gets a sequence number from the global
824 * counter.
825 */
f591fa5d 826 if (!ieee80211_is_data_qos(hdr->frame_control)) {
94778280 827 /* driver should assign sequence number */
f591fa5d 828 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 829 /* for pure STA mode without beacons, we can do it */
830 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
831 tx->sdata->sequence_number += 0x10;
f591fa5d
JB		 832 return TX_CONTINUE;
833 }
834
835 /*
836 * This should be true for injected/management frames only, for
837 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
838 * above since they are not QoS-data frames.
839 */
840 if (!tx->sta)
841 return TX_CONTINUE;
842
843 /* include per-STA, per-TID sequence counter */
844
845 qc = ieee80211_get_qos_ctl(hdr);
846 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
847 seq = &tx->sta->tid_seq[tid];
848
849 hdr->seq_ctrl = cpu_to_le16(*seq);
850
851 /* Increase the sequence number. */
852 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
853
854 return TX_CONTINUE;
855}
856
252b86c4 857static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 858 struct sk_buff *skb, int hdrlen,
859 int frag_threshold)
860{
252b86c4 861 struct ieee80211_local *local = tx->local;
a1a3fcec 862 struct ieee80211_tx_info *info;
252b86c4 863 struct sk_buff *tmp;
2de8e0d9
JB		 864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
867
868 if (WARN_ON(rem < 0))
869 return -EINVAL;
870
252b86c4
JB		 871 /* first fragment was already added to queue by caller */
872
2de8e0d9
JB		 873 while (rem) {
874 int fraglen = per_fragm;
875
876 if (fraglen > rem)
877 fraglen = rem;
878 rem -= fraglen;
879 tmp = dev_alloc_skb(local->tx_headroom +
880 frag_threshold +
881 IEEE80211_ENCRYPT_HEADROOM +
882 IEEE80211_ENCRYPT_TAILROOM);
883 if (!tmp)
884 return -ENOMEM;
252b86c4
JB		 885
886 __skb_queue_tail(&tx->skbs, tmp);
887
2de8e0d9
JB		 888 skb_reserve(tmp, local->tx_headroom +
889 IEEE80211_ENCRYPT_HEADROOM);
890 /* copy control information */
891 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 892
893 info = IEEE80211_SKB_CB(tmp);
894 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
895 IEEE80211_TX_CTL_FIRST_FRAGMENT);
896
897 if (rem)
898 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
899
2de8e0d9
JB		 900 skb_copy_queue_mapping(tmp, skb);
901 tmp->priority = skb->priority;
2de8e0d9 902 tmp->dev = skb->dev;
2de8e0d9
JB		 903
904 /* copy header and data */
905 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
906 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
907
908 pos += fraglen;
909 }
910
252b86c4 911 /* adjust first fragment's length */
2de8e0d9
JB		 912 skb->len = hdrlen + per_fragm;
913 return 0;
914}
915
d9e8a70f 916static ieee80211_tx_result debug_noinline
e2454948
JB		 917ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
918{
2de8e0d9
JB		 919 struct sk_buff *skb = tx->skb;
920 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
921 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 922 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 923 int hdrlen;
924 int fragnum;
e2454948 925
252b86c4
JB		 926 /* no matter what happens, tx->skb moves to tx->skbs */
927 __skb_queue_tail(&tx->skbs, skb);
928 tx->skb = NULL;
929
a26eb27a
JB		 930 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
931 return TX_CONTINUE;
932
933 if (tx->local->ops->set_frag_threshold)
e2454948
JB		 934 return TX_CONTINUE;
935
eefce91a
JB		 936 /*
937 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 938 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 939 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 940 */
8b30b1fe 941 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 942 return TX_DROP;
943
065e9605 944 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 945
a26eb27a 946 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 947 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 948 return TX_DROP;
e6a9854b 949
2de8e0d9
JB		 950 /*
951 * Now fragment the frame. This will allocate all the fragments and
952 * chain them (using skb as the first fragment) to skb->next.
953 * During transmission, we will remove the successfully transmitted
954 * fragments from this list. When the low-level driver rejects one
955 * of the fragments then we will simply pretend to accept the skb
956 * but store it away as pending.
957 */
252b86c4 958 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 959 return TX_DROP;
e6a9854b 960
2de8e0d9
JB		 961 /* update duration/seq/flags of fragments */
962 fragnum = 0;
252b86c4
JB		 963
964 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 965 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 966
2de8e0d9
JB		 967 hdr = (void *)skb->data;
968 info = IEEE80211_SKB_CB(skb);
e6a9854b 969
252b86c4 970 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 971 hdr->frame_control |= morefrags;
e6a9854b
JB		 972 /*
973 * No multi-rate retries for fragmented frames, that
974 * would completely throw off the NAV at other STAs.
975 */
976 info->control.rates[1].idx = -1;
977 info->control.rates[2].idx = -1;
978 info->control.rates[3].idx = -1;
e3e1a0bc 979 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 980 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 981 } else {
982 hdr->frame_control &= ~morefrags;
e6a9854b 983 }
2de8e0d9
JB		 984 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
985 fragnum++;
252b86c4 986 }
e2ebc74d 987
9ae54c84 988 return TX_CONTINUE;
e2ebc74d
JB		 989}
990
feff1f2f
JB		 991static ieee80211_tx_result debug_noinline
992ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
993{
252b86c4 994 struct sk_buff *skb;
560d2682 995 int ac = -1;
feff1f2f
JB		 996
997 if (!tx->sta)
998 return TX_CONTINUE;
999
252b86c4 1000 skb_queue_walk(&tx->skbs, skb) {
560d2682 1001 ac = skb_get_queue_mapping(skb);
feff1f2f 1002 tx->sta->tx_fragments++;
560d2682 1003 tx->sta->tx_bytes[ac] += skb->len;
252b86c4 1004 }
560d2682
JB		 1005 if (ac >= 0)
1006 tx->sta->tx_packets[ac]++;
feff1f2f
JB		 1007
1008 return TX_CONTINUE;
1009}
1010
d9e8a70f 1011static ieee80211_tx_result debug_noinline
e2454948
JB		 1012ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1013{
1014 if (!tx->key)
1015 return TX_CONTINUE;
1016
97359d12
JB		 1017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1020 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1021 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1022 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1023 case WLAN_CIPHER_SUITE_CCMP:
e2454948 1024 return ieee80211_crypto_ccmp_encrypt(tx);
97359d12 1025 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1026 return ieee80211_crypto_aes_cmac_encrypt(tx);
3ffc2a90 1027 default:
d32a1028 1028 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1029 }
1030
e2454948
JB		 1031 return TX_DROP;
1032}
1033
d9e8a70f 1034static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1035ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1036{
252b86c4 1037 struct sk_buff *skb;
2de8e0d9
JB		 1038 struct ieee80211_hdr *hdr;
1039 int next_len;
1040 bool group_addr;
03f93c3d 1041
252b86c4 1042 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1043 hdr = (void *) skb->data;
7e0aae47
JM		 1044 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1045 break; /* must not overwrite AID */
252b86c4
JB		 1046 if (!skb_queue_is_last(&tx->skbs, skb)) {
1047 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1048 next_len = next->len;
1049 } else
1050 next_len = 0;
2de8e0d9 1051 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1052
2de8e0d9 1053 hdr->duration_id =
252b86c4
JB		 1054 ieee80211_duration(tx, skb, group_addr, next_len);
1055 }
03f93c3d
JB		 1056
1057 return TX_CONTINUE;
1058}
1059
e2ebc74d
JB		 1060/* actual transmit path */
1061
a622ab72
JB		 1062static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1063 struct sk_buff *skb,
1064 struct ieee80211_tx_info *info,
1065 struct tid_ampdu_tx *tid_tx,
1066 int tid)
1067{
1068 bool queued = false;
285fa695 1069 bool reset_agg_timer = false;
aa454580 1070 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1071
1072 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1073 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1074 reset_agg_timer = true;
0ab33703
JB		 1075 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1076 /*
1077 * nothing -- this aggregation session is being started
1078 * but that might still fail with the driver
1079 */
a622ab72
JB		 1080 } else {
1081 spin_lock(&tx->sta->lock);
1082 /*
1083 * Need to re-check now, because we may get here
1084 *
1085 * 1) in the window during which the setup is actually
1086 * already done, but not marked yet because not all
1087 * packets are spliced over to the driver pending
1088 * queue yet -- if this happened we acquire the lock
1089 * either before or after the splice happens, but
1090 * need to recheck which of these cases happened.
1091 *
1092 * 2) during session teardown, if the OPERATIONAL bit
1093 * was cleared due to the teardown but the pointer
1094 * hasn't been assigned NULL yet (or we loaded it
1095 * before it was assigned) -- in this case it may
1096 * now be NULL which means we should just let the
1097 * packet pass through because splicing the frames
1098 * back is already done.
1099 */
40b275b6 1100 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1101
1102 if (!tid_tx) {
1103 /* do nothing, let packet pass through */
1104 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1105 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1106 reset_agg_timer = true;
a622ab72
JB		 1107 } else {
1108 queued = true;
1109 info->control.vif = &tx->sdata->vif;
1110 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1111 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1112 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1113 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1114 }
1115 spin_unlock(&tx->sta->lock);
aa454580
HS		 1116
1117 if (purge_skb)
c3e7724b 1118 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1119 }
1120
285fa695
NM		 1121 /* reset session timer */
1122 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1123 tid_tx->last_tx = jiffies;
285fa695 1124
a622ab72
JB		 1125 return queued;
1126}
1127
58d4185e
JB		 1128/*
1129 * initialises @tx
1130 */
9ae54c84 1131static ieee80211_tx_result
3b8d81e0
JB		 1132ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1133 struct ieee80211_tx_data *tx,
1134 struct sk_buff *skb)
e2ebc74d 1135{
3b8d81e0 1136 struct ieee80211_local *local = sdata->local;
58d4185e 1137 struct ieee80211_hdr *hdr;
e039fa4a 1138 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1139 int tid;
a622ab72 1140 u8 *qc;
e2ebc74d
JB		 1141
1142 memset(tx, 0, sizeof(*tx));
1143 tx->skb = skb;
e2ebc74d 1144 tx->local = local;
3b8d81e0 1145 tx->sdata = sdata;
252b86c4 1146 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1147
cd8ffc80
JB		 1148 /*
1149 * If this flag is set to true anywhere, and we get here,
1150 * we are doing the needed processing, so remove the flag
1151 * now.
1152 */
1153 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1154
58d4185e
JB		 1155 hdr = (struct ieee80211_hdr *) skb->data;
1156
3f0e0b22 1157 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
f14543ee 1158 tx->sta = rcu_dereference(sdata->u.vlan.sta);
3f0e0b22
FF		 1159 if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr)
1160 return TX_DROP;
66f2c99a
FF		 1161 } else if (info->flags & IEEE80211_TX_CTL_INJECTED ||
1162 tx->sdata->control_port_protocol == tx->skb->protocol) {
b4d57adb 1163 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
3f0e0b22 1164 }
f14543ee 1165 if (!tx->sta)
abe60632 1166 tx->sta = sta_info_get(sdata, hdr->addr1);
58d4185e 1167
cd8ffc80 1168 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1169 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
edf6b784
AN		 1170 (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) &&
1171 !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1172 struct tid_ampdu_tx *tid_tx;
1173
8b30b1fe
S		 1174 qc = ieee80211_get_qos_ctl(hdr);
1175 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1176
a622ab72
JB		 1177 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1178 if (tid_tx) {
1179 bool queued;
cd8ffc80 1180
a622ab72
JB		 1181 queued = ieee80211_tx_prep_agg(tx, skb, info,
1182 tid_tx, tid);
1183
1184 if (unlikely(queued))
1185 return TX_QUEUED;
1186 }
8b30b1fe
S		 1187 }
1188
badffb72 1189 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1190 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1191 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1192 } else
5cf121c3 1193 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1194
a26eb27a
JB		 1195 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1196 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1197 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1198 info->flags & IEEE80211_TX_CTL_AMPDU)
1199 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1200 }
1201
e2ebc74d 1202 if (!tx->sta)
e039fa4a 1203 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
c2c98fde 1204 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
e039fa4a 1205 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
58d4185e 1206
e039fa4a 1207 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1208
9ae54c84 1209 return TX_CONTINUE;
e2ebc74d
JB		 1210}
1211
11127e91
JB		 1212static bool ieee80211_tx_frags(struct ieee80211_local *local,
1213 struct ieee80211_vif *vif,
1214 struct ieee80211_sta *sta,
1215 struct sk_buff_head *skbs,
1216 bool txpending)
e2ebc74d 1217{
36323f81 1218 struct ieee80211_tx_control control;
252b86c4 1219 struct sk_buff *skb, *tmp;
3b8d81e0 1220 unsigned long flags;
e2ebc74d 1221
252b86c4 1222 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1223 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1224 int q = info->hw_queue;
1225
1226#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1227 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1228 __skb_unlink(skb, skbs);
c3e7724b 1229 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1230 continue;
1231 }
1232#endif
3b8d81e0
JB		 1233
1234 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1235 if (local->queue_stop_reasons[q] ||
7bb45683 1236 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1237 if (unlikely(info->flags &
a7679ed5
SF		 1238 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1239 if (local->queue_stop_reasons[q] &
1240 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1241 /*
1242 * Drop off-channel frames if queues
1243 * are stopped for any reason other
1244 * than off-channel operation. Never
1245 * queue them.
1246 */
1247 spin_unlock_irqrestore(
1248 &local->queue_stop_reason_lock,
1249 flags);
1250 ieee80211_purge_tx_queue(&local->hw,
1251 skbs);
1252 return true;
1253 }
1254 } else {
1255
6c17b77b 1256 /*
a7679ed5
SF		 1257 * Since queue is stopped, queue up frames for
1258 * later transmission from the tx-pending
1259 * tasklet when the queue is woken again.
6c17b77b 1260 */
a7679ed5
SF		 1261 if (txpending)
1262 skb_queue_splice_init(skbs,
1263 &local->pending[q]);
1264 else
1265 skb_queue_splice_tail_init(skbs,
1266 &local->pending[q]);
1267
1268 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1269 flags);
1270 return false;
6c17b77b 1271 }
7bb45683 1272 }
3b8d81e0 1273 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1274
11127e91 1275 info->control.vif = vif;
36323f81 1276 control.sta = sta;
f0e72851 1277
11127e91 1278 __skb_unlink(skb, skbs);
36323f81 1279 drv_tx(local, &control, skb);
11127e91 1280 }
5061b0c2 1281
11127e91
JB		 1282 return true;
1283}
1284
1285/*
1286 * Returns false if the frame couldn't be transmitted but was queued instead.
1287 */
1288static bool __ieee80211_tx(struct ieee80211_local *local,
1289 struct sk_buff_head *skbs, int led_len,
1290 struct sta_info *sta, bool txpending)
1291{
1292 struct ieee80211_tx_info *info;
1293 struct ieee80211_sub_if_data *sdata;
1294 struct ieee80211_vif *vif;
1295 struct ieee80211_sta *pubsta;
1296 struct sk_buff *skb;
1297 bool result = true;
1298 __le16 fc;
5061b0c2 1299
11127e91
JB		 1300 if (WARN_ON(skb_queue_empty(skbs)))
1301 return true;
ec25acc4 1302
11127e91
JB		 1303 skb = skb_peek(skbs);
1304 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1305 info = IEEE80211_SKB_CB(skb);
1306 sdata = vif_to_sdata(info->control.vif);
1307 if (sta && !sta->uploaded)
1308 sta = NULL;
1309
1310 if (sta)
1311 pubsta = &sta->sta;
1312 else
1313 pubsta = NULL;
1314
1315 switch (sdata->vif.type) {
1316 case NL80211_IFTYPE_MONITOR:
4b6f1dd6 1317 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1318 if (sdata) {
4b6f1dd6 1319 vif = &sdata->vif;
3a25a8c8
JB		 1320 info->hw_queue =
1321 vif->hw_queue[skb_get_queue_mapping(skb)];
1322 } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
1323 dev_kfree_skb(skb);
1324 return true;
1325 } else
4b6f1dd6 1326 vif = NULL;
11127e91
JB		 1327 break;
1328 case NL80211_IFTYPE_AP_VLAN:
1329 sdata = container_of(sdata->bss,
1330 struct ieee80211_sub_if_data, u.ap);
1331 /* fall through */
1332 default:
1333 vif = &sdata->vif;
1334 break;
e2ebc74d 1335 }
2de8e0d9 1336
cb831b53
JB		 1337 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1338 txpending);
11127e91 1339
74e4dbfd
JB		 1340 ieee80211_tpt_led_trig_tx(local, fc, led_len);
1341 ieee80211_led_tx(local, 1);
1342
4db4e0a1 1343 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1344
11127e91 1345 return result;
e2ebc74d
JB		 1346}
1347
97b045d6
JB		 1348/*
1349 * Invoke TX handlers, return 0 on success and non-zero if the
1350 * frame was dropped or queued.
1351 */
1352static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1353{
252b86c4 1354 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
97b045d6 1355 ieee80211_tx_result res = TX_DROP;
97b045d6 1356
9aa4aee3
JB		 1357#define CALL_TXH(txh) \
1358 do { \
1359 res = txh(tx); \
1360 if (res != TX_CONTINUE) \
1361 goto txh_done; \
1362 } while (0)
1363
5c1b98a5 1364 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1365 CALL_TXH(ieee80211_tx_h_check_assoc);
1366 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1367 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1368 CALL_TXH(ieee80211_tx_h_select_key);
af65cd96
JB		 1369 if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
1370 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1371
aa5b5492
JB		 1372 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1373 __skb_queue_tail(&tx->skbs, tx->skb);
1374 tx->skb = NULL;
c6fcf6bc 1375 goto txh_done;
aa5b5492 1376 }
c6fcf6bc
JB		 1377
1378 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1379 CALL_TXH(ieee80211_tx_h_sequence);
1380 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1381 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1382 CALL_TXH(ieee80211_tx_h_stats);
1383 CALL_TXH(ieee80211_tx_h_encrypt);
8fd369ee
AN		 1384 if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
1385 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1386#undef CALL_TXH
97b045d6 1387
d9e8a70f 1388 txh_done:
97b045d6 1389 if (unlikely(res == TX_DROP)) {
5479d0e7 1390 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1391 if (tx->skb)
c3e7724b 1392 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1393 else
1f98ab7f 1394 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1395 return -1;
1396 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1397 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1398 return -1;
1399 }
1400
1401 return 0;
1402}
1403
7bb45683
JB		 1404/*
1405 * Returns false if the frame couldn't be transmitted but was queued instead.
1406 */
1407static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
55de908a
JB		 1408 struct sk_buff *skb, bool txpending,
1409 enum ieee80211_band band)
e2ebc74d 1410{
3b8d81e0 1411 struct ieee80211_local *local = sdata->local;
5cf121c3 1412 struct ieee80211_tx_data tx;
97b045d6 1413 ieee80211_tx_result res_prepare;
e039fa4a 1414 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1415 bool result = true;
74e4dbfd 1416 int led_len;
e2ebc74d 1417
e2ebc74d
JB		 1418 if (unlikely(skb->len < 10)) {
1419 dev_kfree_skb(skb);
7bb45683 1420 return true;
e2ebc74d
JB		 1421 }
1422
58d4185e 1423 /* initialises tx */
74e4dbfd 1424 led_len = skb->len;
3b8d81e0 1425 res_prepare = ieee80211_tx_prepare(sdata, &tx, skb);
e2ebc74d 1426
cd8ffc80 1427 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1428 ieee80211_free_txskb(&local->hw, skb);
55de908a 1429 return true;
cd8ffc80 1430 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1431 return true;
e2ebc74d
JB		 1432 }
1433
55de908a 1434 info->band = band;
e2ebc74d 1435
3a25a8c8
JB		 1436 /* set up hw_queue value early */
1437 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1438 !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
1439 info->hw_queue =
1440 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1441
7bb45683 1442 if (!invoke_tx_handlers(&tx))
74e4dbfd
JB		 1443 result = __ieee80211_tx(local, &tx.skbs, led_len,
1444 tx.sta, txpending);
55de908a 1445
7bb45683 1446 return result;
e2ebc74d
JB		 1447}
1448
1449/* device xmit handlers */
1450
3bff1865 1451static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1452 struct sk_buff *skb,
1453 int head_need, bool may_encrypt)
1454{
3bff1865 1455 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1456 int tail_need = 0;
1457
3bff1865 1458 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1459 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1460 tail_need -= skb_tailroom(skb);
1461 tail_need = max_t(int, tail_need, 0);
1462 }
1463
fc7c976d 1464 if (skb_cloned(skb))
23c0752a 1465 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1466 else if (head_need || tail_need)
23c0752a 1467 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1468 else
1469 return 0;
23c0752a
JB		 1470
1471 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1472 wiphy_debug(local->hw.wiphy,
1473 "failed to reallocate TX buffer\n");
23c0752a
JB		 1474 return -ENOMEM;
1475 }
1476
23c0752a
JB		 1477 return 0;
1478}
1479
55de908a
JB		 1480void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1481 enum ieee80211_band band)
e2ebc74d 1482{
3b8d81e0 1483 struct ieee80211_local *local = sdata->local;
e039fa4a 1484 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1485 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1486 int headroom;
23c0752a 1487 bool may_encrypt;
e2ebc74d 1488
3b8d81e0 1489 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1490
3b8d81e0 1491 headroom = local->tx_headroom;
23c0752a
JB		 1492 if (may_encrypt)
1493 headroom += IEEE80211_ENCRYPT_HEADROOM;
1494 headroom -= skb_headroom(skb);
1495 headroom = max_t(int, 0, headroom);
1496
3bff1865 1497 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1498 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1499 return;
e2ebc74d
JB		 1500 }
1501
740c1aa3 1502 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1503 info->control.vif = &sdata->vif;
e2ebc74d 1504
3f52b7e3
MP		 1505 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1506 if (ieee80211_is_data(hdr->frame_control) &&
1507 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1508 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1509 return; /* skb queued: don't free */
1510 } else {
1511 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1512 }
98aed9fd 1513 }
cca89496 1514
2154c81c 1515 ieee80211_set_qos_hdr(sdata, skb);
55de908a 1516 ieee80211_tx(sdata, skb, false, band);
e2ebc74d
JB		 1517}
1518
73b9f03a
JB		 1519static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb)
1520{
1521 struct ieee80211_radiotap_iterator iterator;
1522 struct ieee80211_radiotap_header *rthdr =
1523 (struct ieee80211_radiotap_header *) skb->data;
1524 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1525 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1526 NULL);
1527 u16 txflags;
1528
1529 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1530 IEEE80211_TX_CTL_DONTFRAG;
1531
1532 /*
1533 * for every radiotap entry that is present
1534 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1535 * entries present, or -EINVAL on error)
1536 */
1537
1538 while (!ret) {
1539 ret = ieee80211_radiotap_iterator_next(&iterator);
1540
1541 if (ret)
1542 continue;
1543
1544 /* see if this argument is something we can use */
1545 switch (iterator.this_arg_index) {
1546 /*
1547 * You must take care when dereferencing iterator.this_arg
1548 * for multibyte types... the pointer is not aligned. Use
1549 * get_unaligned((type *)iterator.this_arg) to dereference
1550 * iterator.this_arg for type "type" safely on all arches.
1551 */
1552 case IEEE80211_RADIOTAP_FLAGS:
1553 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1554 /*
1555 * this indicates that the skb we have been
1556 * handed has the 32-bit FCS CRC at the end...
1557 * we should react to that by snipping it off
1558 * because it will be recomputed and added
1559 * on transmission
1560 */
1561 if (skb->len < (iterator._max_length + FCS_LEN))
1562 return false;
1563
1564 skb_trim(skb, skb->len - FCS_LEN);
1565 }
1566 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1567 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1568 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1569 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1570 break;
1571
1572 case IEEE80211_RADIOTAP_TX_FLAGS:
1573 txflags = get_unaligned_le16(iterator.this_arg);
1574 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1575 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1576 break;
1577
1578 /*
1579 * Please update the file
1580 * Documentation/networking/mac80211-injection.txt
1581 * when parsing new fields here.
1582 */
1583
1584 default:
1585 break;
1586 }
1587 }
1588
1589 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
1590 return false;
1591
1592 /*
1593 * remove the radiotap header
1594 * iterator->_max_length was sanity-checked against
1595 * skb->len by iterator init
1596 */
1597 skb_pull(skb, iterator._max_length);
1598
1599 return true;
1600}
1601
d0cf9c0d
SH		 1602netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1603 struct net_device *dev)
e2ebc74d
JB		 1604{
1605 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a
JB		 1606 struct ieee80211_chanctx_conf *chanctx_conf;
1607 struct ieee80211_channel *chan;
e2ebc74d
JB		 1608 struct ieee80211_radiotap_header *prthdr =
1609 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 1610 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 1611 struct ieee80211_hdr *hdr;
5d9cf4a5 1612 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
9b8a74e3 1613 u16 len_rthdr;
5d9cf4a5 1614 int hdrlen;
e2ebc74d 1615
9b8a74e3
AG		 1616 /* check for not even having the fixed radiotap header part */
1617 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
1618 goto fail; /* too short to be possibly valid */
1619
1620 /* is it a header version we can trust to find length from? */
1621 if (unlikely(prthdr->it_version))
1622 goto fail; /* only version 0 is supported */
1623
1624 /* then there must be a radiotap header with a length we can use */
1625 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1626
1627 /* does the skb contain enough to deliver on the alleged length? */
1628 if (unlikely(skb->len < len_rthdr))
1629 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 1630
e2ebc74d
JB		 1631 /*
1632 * fix up the pointers accounting for the radiotap
1633 * header still being in there. We are being given
1634 * a precooked IEEE80211 header so no need for
1635 * normal processing
1636 */
9b8a74e3 1637 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 1638 /*
9b8a74e3
AG		 1639 * these are just fixed to the end of the rt area since we
1640 * don't have any better information and at this point, nobody cares
e2ebc74d 1641 */
9b8a74e3
AG		 1642 skb_set_network_header(skb, len_rthdr);
1643 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 1644
5d9cf4a5
JB		 1645 if (skb->len < len_rthdr + 2)
1646 goto fail;
1647
1648 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1649 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1650
1651 if (skb->len < len_rthdr + hdrlen)
1652 goto fail;
1653
f75f5c6f
HS		 1654 /*
1655 * Initialize skb->protocol if the injected frame is a data frame
1656 * carrying a rfc1042 header
1657 */
5d9cf4a5
JB		 1658 if (ieee80211_is_data(hdr->frame_control) &&
1659 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
1660 u8 *payload = (u8 *)hdr + hdrlen;
1661
b203ca39 1662 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 1663 skb->protocol = cpu_to_be16((payload[6] << 8) |
1664 payload[7]);
f75f5c6f
HS		 1665 }
1666
3b8d81e0
JB		 1667 memset(info, 0, sizeof(*info));
1668
5d9cf4a5 1669 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 1670 IEEE80211_TX_CTL_INJECTED;
1671
1672 /* process and remove the injection radiotap header */
1673 if (!ieee80211_parse_tx_radiotap(skb))
1674 goto fail;
5d9cf4a5
JB		 1675
1676 rcu_read_lock();
1677
1678 /*
1679 * We process outgoing injected frames that have a local address
1680 * we handle as though they are non-injected frames.
1681 * This code here isn't entirely correct, the local MAC address
1682 * isn't always enough to find the interface to use; for proper
1683 * VLAN/WDS support we will need a different mechanism (which
1684 * likely isn't going to be monitor interfaces).
1685 */
1686 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1687
1688 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
1689 if (!ieee80211_sdata_running(tmp_sdata))
1690 continue;
1691 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1692 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1693 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
1694 continue;
b203ca39 1695 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 1696 sdata = tmp_sdata;
1697 break;
1698 }
1699 }
7351c6bd 1700
55de908a
JB		 1701 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1702 if (!chanctx_conf) {
1703 tmp_sdata = rcu_dereference(local->monitor_sdata);
1704 if (tmp_sdata)
1705 chanctx_conf =
1706 rcu_dereference(tmp_sdata->vif.chanctx_conf);
1707 }
55de908a 1708
b4a7ff75
FF		 1709 if (chanctx_conf)
1710 chan = chanctx_conf->def.chan;
1711 else if (!local->use_chanctx)
1712 chan = local->_oper_channel;
1713 else
1714 goto fail_rcu;
55de908a
JB		 1715
1716 /*
1717 * Frame injection is not allowed if beaconing is not allowed
1718 * or if we need radar detection. Beaconing is usually not allowed when
1719 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
1720 * Passive scan is also used in world regulatory domains where
1721 * your country is not known and as such it should be treated as
1722 * NO TX unless the channel is explicitly allowed in which case
1723 * your current regulatory domain would not have the passive scan
1724 * flag.
1725 *
1726 * Since AP mode uses monitor interfaces to inject/TX management
1727 * frames we can make AP mode the exception to this rule once it
1728 * supports radar detection as its implementation can deal with
1729 * radar detection by itself. We can do that later by adding a
1730 * monitor flag interfaces used for AP support.
1731 */
1732 if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
1733 IEEE80211_CHAN_PASSIVE_SCAN)))
1734 goto fail_rcu;
1735
1736 ieee80211_xmit(sdata, skb, chan->band);
5d9cf4a5
JB		 1737 rcu_read_unlock();
1738
e2ebc74d 1739 return NETDEV_TX_OK;
9b8a74e3 1740
55de908a
JB		 1741fail_rcu:
1742 rcu_read_unlock();
9b8a74e3
AG		 1743fail:
1744 dev_kfree_skb(skb);
1745 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 1746}
1747
1748/**
1749 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1750 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1751 * @skb: packet to be sent
1752 * @dev: incoming interface
1753 *
1754 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1755 * not be freed, and caller is responsible for either retrying later or freeing
1756 * skb).
1757 *
1758 * This function takes in an Ethernet header and encapsulates it with suitable
1759 * IEEE 802.11 header based on which interface the packet is coming in. The
1760 * encapsulated packet will then be passed to master interface, wlan#.11, for
1761 * transmission (through low-level driver).
1762 */
d0cf9c0d
SH		 1763netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1764 struct net_device *dev)
e2ebc74d 1765{
133b8226
JB		 1766 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1767 struct ieee80211_local *local = sdata->local;
489ee919 1768 struct ieee80211_tx_info *info;
dcf33963 1769 int head_need;
065e9605
HH		 1770 u16 ethertype, hdrlen, meshhdrlen = 0;
1771 __le16 fc;
e2ebc74d 1772 struct ieee80211_hdr hdr;
ff67bb86 1773 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 1774 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 1775 const u8 *encaps_data;
1776 int encaps_len, skip_header_bytes;
e8bf9649 1777 int nh_pos, h_pos;
f14543ee 1778 struct sta_info *sta = NULL;
c2c98fde 1779 bool wme_sta = false, authorized = false, tdls_auth = false;
941c93cd 1780 bool tdls_direct = false;
a729cff8
JB		 1781 bool multicast;
1782 u32 info_flags = 0;
1783 u16 info_id = 0;
55de908a
JB		 1784 struct ieee80211_chanctx_conf *chanctx_conf;
1785 struct ieee80211_sub_if_data *ap_sdata;
1786 enum ieee80211_band band;
e2ebc74d 1787
dcf33963 1788 if (unlikely(skb->len < ETH_HLEN))
e2ebc74d 1789 goto fail;
e2ebc74d 1790
e2ebc74d
JB		 1791 /* convert Ethernet header to proper 802.11 header (based on
1792 * operation mode) */
1793 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 1794 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 1795
55de908a
JB		 1796 rcu_read_lock();
1797
51fb61e7 1798 switch (sdata->vif.type) {
05c914fe 1799 case NL80211_IFTYPE_AP_VLAN:
9bc383de 1800 sta = rcu_dereference(sdata->u.vlan.sta);
f14543ee
FF		 1801 if (sta) {
1802 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
1803 /* RA TA DA SA */
1804 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 1805 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 1806 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1807 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1808 hdrlen = 30;
c2c98fde
JB		 1809 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1810 wme_sta = test_sta_flag(sta, WLAN_STA_WME);
f14543ee 1811 }
55de908a
JB		 1812 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1813 u.ap);
1814 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
1815 if (!chanctx_conf)
1816 goto fail_rcu;
4bf88530 1817 band = chanctx_conf->def.chan->band;
f14543ee
FF		 1818 if (sta)
1819 break;
1820 /* fall through */
1821 case NL80211_IFTYPE_AP:
fe80123d
AB		 1822 if (sdata->vif.type == NL80211_IFTYPE_AP)
1823 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1824 if (!chanctx_conf)
1825 goto fail_rcu;
065e9605 1826 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 1827 /* DA BSSID SA */
1828 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 1829 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 1830 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
1831 hdrlen = 24;
4bf88530 1832 band = chanctx_conf->def.chan->band;
cf966838 1833 break;
05c914fe 1834 case NL80211_IFTYPE_WDS:
065e9605 1835 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 1836 /* RA TA DA SA */
1837 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 1838 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 1839 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1840 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1841 hdrlen = 30;
55de908a
JB		 1842 /*
1843 * This is the exception! WDS style interfaces are prohibited
1844 * when channel contexts are in used so this must be valid
1845 */
1846 band = local->hw.conf.channel->band;
cf966838 1847 break;
33b64eb2 1848#ifdef CONFIG_MAC80211_MESH
05c914fe 1849 case NL80211_IFTYPE_MESH_POINT:
472dbc45 1850 if (!sdata->u.mesh.mshcfg.dot11MeshTTL) {
e32f85f7 1851 /* Do not send frames with mesh_ttl == 0 */
472dbc45 1852 sdata->u.mesh.mshstats.dropped_frames_ttl++;
55de908a 1853 goto fail_rcu;
33b64eb2 1854 }
55de908a 1855
b8bacc18 1856 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 1857 struct sta_info *next_hop;
1858 bool mpp_lookup = true;
1859
bf7cd94d 1860 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 1861 if (mpath) {
1862 mpp_lookup = false;
1863 next_hop = rcu_dereference(mpath->next_hop);
1864 if (!next_hop ||
1865 !(mpath->flags & (MESH_PATH_ACTIVE |
1866 MESH_PATH_RESOLVING)))
1867 mpp_lookup = true;
1868 }
1869
1870 if (mpp_lookup)
bf7cd94d 1871 mppath = mpp_path_lookup(sdata, skb->data);
163df6cf
CYY		 1872
1873 if (mppath && mpath)
1874 mesh_path_del(mpath->sdata, mpath->dst);
b8bacc18 1875 }
79617dee 1876
f76b57b4 1877 /*
9d52501b
JF		 1878 * Use address extension if it is a packet from
1879 * another interface or if we know the destination
1880 * is being proxied by a portal (i.e. portal address
1881 * differs from proxied address)
f76b57b4 1882 */
b203ca39
JP		 1883 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
1884 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 1885 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
1886 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 1887 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
1888 NULL, NULL);
79617dee 1889 } else {
27f01124
TP		 1890 /* DS -> MBSS (802.11-2012 13.11.3.3).
1891 * For unicast with unknown forwarding information,
1892 * destination might be in the MBSS or if that fails
1893 * forwarded to another mesh gate. In either case
1894 * resolution will be handled in ieee80211_xmit(), so
1895 * leave the original DA. This also works for mcast */
1896 const u8 *mesh_da = skb->data;
1897
1898 if (mppath)
1899 mesh_da = mppath->mpp;
1900 else if (mpath)
1901 mesh_da = mpath->dst;
79617dee 1902
3c5772a5 1903 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 1904 mesh_da, sdata->vif.addr);
27f01124
TP		 1905 if (is_multicast_ether_addr(mesh_da))
1906 /* DA TA mSA AE:SA */
bf7cd94d
JB		 1907 meshhdrlen = ieee80211_new_mesh_header(
1908 sdata, &mesh_hdr,
1909 skb->data + ETH_ALEN, NULL);
3c5772a5 1910 else
27f01124 1911 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 1912 meshhdrlen = ieee80211_new_mesh_header(
1913 sdata, &mesh_hdr, skb->data,
1914 skb->data + ETH_ALEN);
79617dee 1915
79617dee 1916 }
55de908a
JB		 1917 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1918 if (!chanctx_conf)
1919 goto fail_rcu;
4bf88530 1920 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 1921 break;
1922#endif
05c914fe 1923 case NL80211_IFTYPE_STATION:
941c93cd 1924 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
c2c98fde
JB		 1925 bool tdls_peer = false;
1926
941c93cd 1927 sta = sta_info_get(sdata, skb->data);
c2c98fde
JB		 1928 if (sta) {
1929 authorized = test_sta_flag(sta,
1930 WLAN_STA_AUTHORIZED);
1931 wme_sta = test_sta_flag(sta, WLAN_STA_WME);
1932 tdls_peer = test_sta_flag(sta,
1933 WLAN_STA_TDLS_PEER);
1934 tdls_auth = test_sta_flag(sta,
1935 WLAN_STA_TDLS_PEER_AUTH);
1936 }
941c93cd
AN		 1937
1938 /*
1939 * If the TDLS link is enabled, send everything
1940 * directly. Otherwise, allow TDLS setup frames
1941 * to be transmitted indirectly.
1942 */
c2c98fde 1943 tdls_direct = tdls_peer && (tdls_auth ||
941c93cd
AN		 1944 !(ethertype == ETH_P_TDLS && skb->len > 14 &&
1945 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE));
1946 }
1947
1948 if (tdls_direct) {
1949 /* link during setup - throw out frames to peer */
dcf33963 1950 if (!tdls_auth)
55de908a 1951 goto fail_rcu;
941c93cd
AN		 1952
1953 /* DA SA BSSID */
1954 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1955 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1956 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
1957 hdrlen = 24;
1958 } else if (sdata->u.mgd.use_4addr &&
1959 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
1960 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
1961 IEEE80211_FCTL_TODS);
f14543ee 1962 /* RA TA DA SA */
941c93cd 1963 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 1964 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 1965 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1966 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
1967 hdrlen = 30;
1968 } else {
1969 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
1970 /* BSSID SA DA */
941c93cd 1971 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 1972 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
1973 memcpy(hdr.addr3, skb->data, ETH_ALEN);
1974 hdrlen = 24;
1975 }
55de908a
JB		 1976 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1977 if (!chanctx_conf)
1978 goto fail_rcu;
4bf88530 1979 band = chanctx_conf->def.chan->band;
cf966838 1980 break;
05c914fe 1981 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 1982 /* DA SA BSSID */
1983 memcpy(hdr.addr1, skb->data, ETH_ALEN);
1984 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 1985 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 1986 hdrlen = 24;
55de908a
JB		 1987 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1988 if (!chanctx_conf)
1989 goto fail_rcu;
4bf88530 1990 band = chanctx_conf->def.chan->band;
cf966838
JB		 1991 break;
1992 default:
55de908a 1993 goto fail_rcu;
e2ebc74d
JB		 1994 }
1995
7d185b8b
JB		 1996 /*
1997 * There's no need to try to look up the destination
1998 * if it is a multicast address (which can only happen
1999 * in AP mode)
2000 */
a729cff8
JB		 2001 multicast = is_multicast_ether_addr(hdr.addr1);
2002 if (!multicast) {
abe60632 2003 sta = sta_info_get(sdata, hdr.addr1);
c2c98fde
JB		 2004 if (sta) {
2005 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2006 wme_sta = test_sta_flag(sta, WLAN_STA_WME);
2007 }
e2ebc74d
JB		 2008 }
2009
4777be41
JC		 2010 /* For mesh, the use of the QoS header is mandatory */
2011 if (ieee80211_vif_is_mesh(&sdata->vif))
c2c98fde 2012 wme_sta = true;
4777be41 2013
3434fbd3 2014 /* receiver and we are QoS enabled, use a QoS type frame */
32c5057b 2015 if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) {
065e9605 2016 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2017 hdrlen += 2;
2018 }
2019
2020 /*
238814fd
JB		 2021 * Drop unicast frames to unauthorised stations unless they are
2022 * EAPOL frames from the local station.
ce3edf6d 2023 */
55182e4a
JB		 2024 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2025 !is_multicast_ether_addr(hdr.addr1) && !authorized &&
2026 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2027 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2028#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2029 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
e87cc472 2030 dev->name, hdr.addr1);
ce3edf6d
JB		 2031#endif
2032
2033 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2034
55de908a 2035 goto fail_rcu;
ce3edf6d
JB		 2036 }
2037
a729cff8
JB		 2038 if (unlikely(!multicast && skb->sk &&
2039 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
2040 struct sk_buff *orig_skb = skb;
2041
2042 skb = skb_clone(skb, GFP_ATOMIC);
2043 if (skb) {
2044 unsigned long flags;
9475af6e 2045 int id;
a729cff8
JB		 2046
2047 spin_lock_irqsave(&local->ack_status_lock, flags);
9475af6e
TH		 2048 id = idr_alloc(&local->ack_status_frames, orig_skb,
2049 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2050 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2051
9475af6e 2052 if (id >= 0) {
a729cff8
JB		 2053 info_id = id;
2054 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2055 } else if (skb_shared(skb)) {
2056 kfree_skb(orig_skb);
2057 } else {
2058 kfree_skb(skb);
2059 skb = orig_skb;
2060 }
2061 } else {
2062 /* couldn't clone -- lose tx status ... */
2063 skb = orig_skb;
2064 }
2065 }
2066
7e244707
HS		 2067 /*
2068 * If the skb is shared we need to obtain our own copy.
2069 */
2070 if (skb_shared(skb)) {
a729cff8
JB		 2071 struct sk_buff *tmp_skb = skb;
2072
2073 /* can't happen -- skb is a clone if info_id != 0 */
2074 WARN_ON(info_id);
2075
f8a0a781 2076 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2077 kfree_skb(tmp_skb);
2078
dcf33963 2079 if (!skb)
55de908a 2080 goto fail_rcu;
7e244707
HS		 2081 }
2082
065e9605 2083 hdr.frame_control = fc;
e2ebc74d
JB		 2084 hdr.duration_id = 0;
2085 hdr.seq_ctrl = 0;
2086
2087 skip_header_bytes = ETH_HLEN;
2088 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2089 encaps_data = bridge_tunnel_header;
2090 encaps_len = sizeof(bridge_tunnel_header);
2091 skip_header_bytes -= 2;
2092 } else if (ethertype >= 0x600) {
2093 encaps_data = rfc1042_header;
2094 encaps_len = sizeof(rfc1042_header);
2095 skip_header_bytes -= 2;
2096 } else {
2097 encaps_data = NULL;
2098 encaps_len = 0;
2099 }
2100
7e244707
HS		 2101 nh_pos = skb_network_header(skb) - skb->data;
2102 h_pos = skb_transport_header(skb) - skb->data;
2103
e2ebc74d
JB		 2104 skb_pull(skb, skip_header_bytes);
2105 nh_pos -= skip_header_bytes;
2106 h_pos -= skip_header_bytes;
2107
23c0752a 2108 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2109
23c0752a
JB		 2110 /*
2111 * So we need to modify the skb header and hence need a copy of
2112 * that. The head_need variable above doesn't, so far, include
2113 * the needed header space that we don't need right away. If we
2114 * can, then we don't reallocate right now but only after the
2115 * frame arrives at the master device (if it does...)
2116 *
2117 * If we cannot, however, then we will reallocate to include all
2118 * the ever needed space. Also, if we need to reallocate it anyway,
2119 * make it big enough for everything we may ever need.
2120 */
e2ebc74d 2121
3a5be7d4 2122 if (head_need > 0 || skb_cloned(skb)) {
23c0752a
JB		 2123 head_need += IEEE80211_ENCRYPT_HEADROOM;
2124 head_need += local->tx_headroom;
2125 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2126 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2127 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2128 skb = NULL;
55de908a 2129 goto fail_rcu;
c3e7724b 2130 }
e2ebc74d
JB		 2131 }
2132
2133 if (encaps_data) {
2134 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2135 nh_pos += encaps_len;
2136 h_pos += encaps_len;
2137 }
c29b9b9b 2138
e4ab7eb0 2139#ifdef CONFIG_MAC80211_MESH
33b64eb2
LCC		 2140 if (meshhdrlen > 0) {
2141 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2142 nh_pos += meshhdrlen;
2143 h_pos += meshhdrlen;
2144 }
e4ab7eb0 2145#endif
33b64eb2 2146
065e9605 2147 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2148 __le16 *qos_control;
2149
2150 qos_control = (__le16*) skb_push(skb, 2);
2151 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2152 /*
2153 * Maybe we could actually set some fields here, for now just
2154 * initialise to zero to indicate no special operation.
2155 */
2156 *qos_control = 0;
2157 } else
2158 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2159
e2ebc74d
JB		 2160 nh_pos += hdrlen;
2161 h_pos += hdrlen;
2162
68aae116
SH		 2163 dev->stats.tx_packets++;
2164 dev->stats.tx_bytes += skb->len;
e2ebc74d
JB		 2165
2166 /* Update skb pointers to various headers since this modified frame
2167 * is going to go through Linux networking code that may potentially
2168 * need things like pointer to IP header. */
2169 skb_set_mac_header(skb, 0);
2170 skb_set_network_header(skb, nh_pos);
2171 skb_set_transport_header(skb, h_pos);
2172
489ee919 2173 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2174 memset(info, 0, sizeof(*info));
2175
e2ebc74d 2176 dev->trans_start = jiffies;
a729cff8
JB		 2177
2178 info->flags = info_flags;
2179 info->ack_frame_id = info_id;
2180
55de908a
JB		 2181 ieee80211_xmit(sdata, skb, band);
2182 rcu_read_unlock();
e2ebc74d 2183
ec634fe3 2184 return NETDEV_TX_OK;
e2ebc74d 2185
55de908a
JB		 2186 fail_rcu:
2187 rcu_read_unlock();
e2ebc74d 2188 fail:
dcf33963
JB		 2189 dev_kfree_skb(skb);
2190 return NETDEV_TX_OK;
e2ebc74d
JB		 2191}
2192
e2ebc74d 2193
e2530083
JB		 2194/*
2195 * ieee80211_clear_tx_pending may not be called in a context where
2196 * it is possible that it packets could come in again.
2197 */
e2ebc74d
JB		 2198void ieee80211_clear_tx_pending(struct ieee80211_local *local)
2199{
1f98ab7f 2200 struct sk_buff *skb;
2de8e0d9 2201 int i;
e2ebc74d 2202
1f98ab7f
FF		 2203 for (i = 0; i < local->hw.queues; i++) {
2204 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
2205 ieee80211_free_txskb(&local->hw, skb);
2206 }
e2ebc74d
JB		 2207}
2208
7bb45683
JB		 2209/*
2210 * Returns false if the frame couldn't be transmitted but was queued instead,
2211 * which in this case means re-queued -- take as an indication to stop sending
2212 * more pending frames.
2213 */
cd8ffc80
JB		 2214static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
2215 struct sk_buff *skb)
2216{
2217 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2218 struct ieee80211_sub_if_data *sdata;
2219 struct sta_info *sta;
2220 struct ieee80211_hdr *hdr;
7bb45683 2221 bool result;
55de908a 2222 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 2223
5061b0c2 2224 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 2225
2226 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 2227 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2228 if (unlikely(!chanctx_conf)) {
2229 dev_kfree_skb(skb);
2230 return true;
2231 }
2232 result = ieee80211_tx(sdata, skb, true,
4bf88530 2233 chanctx_conf->def.chan->band);
cd8ffc80 2234 } else {
252b86c4
JB		 2235 struct sk_buff_head skbs;
2236
2237 __skb_queue_head_init(&skbs);
2238 __skb_queue_tail(&skbs, skb);
2239
cd8ffc80 2240 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 2241 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 2242
74e4dbfd 2243 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 2244 }
2245
cd8ffc80
JB		 2246 return result;
2247}
2248
e2530083 2249/*
3b8d81e0 2250 * Transmit all pending packets. Called from tasklet.
e2530083 2251 */
e2ebc74d
JB		 2252void ieee80211_tx_pending(unsigned long data)
2253{
2254 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 2255 unsigned long flags;
cd8ffc80 2256 int i;
3b8d81e0 2257 bool txok;
e2ebc74d 2258
f0e72851 2259 rcu_read_lock();
e2530083 2260
3b8d81e0 2261 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 2262 for (i = 0; i < local->hw.queues; i++) {
2263 /*
2264 * If queue is stopped by something other than due to pending
2265 * frames, or we have no pending frames, proceed to next queue.
2266 */
3b8d81e0 2267 if (local->queue_stop_reasons[i] ||
2a577d98 2268 skb_queue_empty(&local->pending[i]))
e2ebc74d 2269 continue;
e2530083 2270
2a577d98 2271 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 2272 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 2273 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 2274
a7bc376c 2275 if (WARN_ON(!info->control.vif)) {
c3e7724b 2276 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 2277 continue;
2278 }
2279
3b8d81e0
JB		 2280 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
2281 flags);
2282
2283 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 2284 spin_lock_irqsave(&local->queue_stop_reason_lock,
2285 flags);
2286 if (!txok)
2a577d98 2287 break;
e2ebc74d 2288 }
7236fe29
JB		 2289
2290 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 2291 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 2292 }
3b8d81e0 2293 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 2294
f0e72851 2295 rcu_read_unlock();
e2ebc74d
JB		 2296}
2297
2298/* functions for drivers to get certain frames */
2299
eac70c13
MP		 2300static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
2301 struct ps_data *ps, struct sk_buff *skb)
e2ebc74d
JB		 2302{
2303 u8 *pos, *tim;
2304 int aid0 = 0;
2305 int i, have_bits = 0, n1, n2;
2306
2307 /* Generate bitmap for TIM only if there are any STAs in power save
2308 * mode. */
d012a605 2309 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 2310 /* in the hope that this is faster than
2311 * checking byte-for-byte */
d012a605 2312 have_bits = !bitmap_empty((unsigned long*)ps->tim,
e2ebc74d
JB		 2313 IEEE80211_MAX_AID+1);
2314
d012a605
MP		 2315 if (ps->dtim_count == 0)
2316 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
e2ebc74d 2317 else
d012a605 2318 ps->dtim_count--;
e2ebc74d
JB		 2319
2320 tim = pos = (u8 *) skb_put(skb, 6);
2321 *pos++ = WLAN_EID_TIM;
2322 *pos++ = 4;
d012a605 2323 *pos++ = ps->dtim_count;
8860020e 2324 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 2325
d012a605 2326 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 2327 aid0 = 1;
2328
d012a605 2329 ps->dtim_bc_mc = aid0 == 1;
512119b3 2330
e2ebc74d
JB		 2331 if (have_bits) {
2332 /* Find largest even number N1 so that bits numbered 1 through
2333 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
2334 * (N2 + 1) x 8 through 2007 are 0. */
2335 n1 = 0;
2336 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 2337 if (ps->tim[i]) {
e2ebc74d
JB		 2338 n1 = i & 0xfe;
2339 break;
2340 }
2341 }
2342 n2 = n1;
2343 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 2344 if (ps->tim[i]) {
e2ebc74d
JB		 2345 n2 = i;
2346 break;
2347 }
2348 }
2349
2350 /* Bitmap control */
2351 *pos++ = n1 | aid0;
2352 /* Part Virt Bitmap */
5220da39 2353 skb_put(skb, n2 - n1);
d012a605 2354 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 2355
2356 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 2357 } else {
2358 *pos++ = aid0; /* Bitmap control */
2359 *pos++ = 0; /* Part Virt Bitmap */
2360 }
e2ebc74d
JB		 2361}
2362
eac70c13
MP		 2363static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
2364 struct ps_data *ps, struct sk_buff *skb)
2365{
2366 struct ieee80211_local *local = sdata->local;
2367
2368 /*
2369 * Not very nice, but we want to allow the driver to call
2370 * ieee80211_beacon_get() as a response to the set_tim()
2371 * callback. That, however, is already invoked under the
2372 * sta_lock to guarantee consistent and race-free update
2373 * of the tim bitmap in mac80211 and the driver.
2374 */
2375 if (local->tim_in_locked_section) {
2376 __ieee80211_beacon_add_tim(sdata, ps, skb);
2377 } else {
1b91731d 2378 spin_lock_bh(&local->tim_lock);
eac70c13 2379 __ieee80211_beacon_add_tim(sdata, ps, skb);
1b91731d 2380 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 2381 }
2382
2383 return 0;
2384}
2385
eddcbb94
JB		 2386struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
2387 struct ieee80211_vif *vif,
2388 u16 *tim_offset, u16 *tim_length)
e2ebc74d
JB		 2389{
2390 struct ieee80211_local *local = hw_to_local(hw);
9d139c81 2391 struct sk_buff *skb = NULL;
e039fa4a 2392 struct ieee80211_tx_info *info;
e2ebc74d 2393 struct ieee80211_sub_if_data *sdata = NULL;
55de908a 2394 enum ieee80211_band band;
e00cfce0 2395 struct ieee80211_tx_rate_control txrc;
55de908a 2396 struct ieee80211_chanctx_conf *chanctx_conf;
8318d78a 2397
5dfdaf58 2398 rcu_read_lock();
e2ebc74d 2399
32bfd35d 2400 sdata = vif_to_sdata(vif);
55de908a 2401 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 2402
55de908a 2403 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 2404 goto out;
2405
eddcbb94
JB		 2406 if (tim_offset)
2407 *tim_offset = 0;
2408 if (tim_length)
2409 *tim_length = 0;
2410
05c914fe 2411 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605
MP		 2412 struct ieee80211_if_ap *ap = &sdata->u.ap;
2413 struct beacon_data *beacon = rcu_dereference(ap->beacon);
2414
3ad97fbc 2415 if (beacon) {
902acc78
JB		 2416 /*
2417 * headroom, head length,
2418 * tail length and maximum TIM length
2419 */
2420 skb = dev_alloc_skb(local->tx_headroom +
2421 beacon->head_len +
2422 beacon->tail_len + 256);
2423 if (!skb)
2424 goto out;
33b64eb2 2425
902acc78
JB		 2426 skb_reserve(skb, local->tx_headroom);
2427 memcpy(skb_put(skb, beacon->head_len), beacon->head,
2428 beacon->head_len);
33b64eb2 2429
eac70c13 2430 ieee80211_beacon_add_tim(sdata, &ap->ps, skb);
33b64eb2 2431
eddcbb94
JB		 2432 if (tim_offset)
2433 *tim_offset = beacon->head_len;
2434 if (tim_length)
2435 *tim_length = skb->len - beacon->head_len;
2436
902acc78
JB		 2437 if (beacon->tail)
2438 memcpy(skb_put(skb, beacon->tail_len),
2439 beacon->tail, beacon->tail_len);
9d139c81
JB		 2440 } else
2441 goto out;
05c914fe 2442 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 2443 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 2444 struct ieee80211_hdr *hdr;
c3ffeab4 2445 struct beacon_data *presp = rcu_dereference(ifibss->presp);
33b64eb2 2446
af8cdcd8 2447 if (!presp)
9d139c81
JB		 2448 goto out;
2449
c3ffeab4 2450 skb = dev_alloc_skb(local->tx_headroom + presp->head_len);
9d139c81
JB		 2451 if (!skb)
2452 goto out;
c3ffeab4
JB		 2453 skb_reserve(skb, local->tx_headroom);
2454 memcpy(skb_put(skb, presp->head_len), presp->head,
2455 presp->head_len);
9d139c81
JB		 2456
2457 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 2458 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2459 IEEE80211_STYPE_BEACON);
902acc78 2460 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 2461 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2b5e1967 2462 struct beacon_data *bcn = rcu_dereference(ifmsh->beacon);
472dbc45 2463
2b5e1967 2464 if (!bcn)
ac1bd846 2465 goto out;
ac1bd846 2466
dbf498fb
JC		 2467 if (ifmsh->sync_ops)
2468 ifmsh->sync_ops->adjust_tbtt(
2469 sdata);
2470
3b69a9c5 2471 skb = dev_alloc_skb(local->tx_headroom +
2b5e1967 2472 bcn->head_len +
3f52b7e3 2473 256 + /* TIM IE */
2b5e1967 2474 bcn->tail_len);
902acc78
JB		 2475 if (!skb)
2476 goto out;
2b5e1967
TP		 2477 skb_reserve(skb, local->tx_headroom);
2478 memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len);
2479 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb);
2480 memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len);
9d139c81
JB		 2481 } else {
2482 WARN_ON(1);
5dfdaf58 2483 goto out;
e2ebc74d
JB		 2484 }
2485
4bf88530 2486 band = chanctx_conf->def.chan->band;
55de908a 2487
e039fa4a
JB		 2488 info = IEEE80211_SKB_CB(skb);
2489
3b8d81e0 2490 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 2491 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 2492 info->band = band;
e00cfce0
JM		 2493
2494 memset(&txrc, 0, sizeof(txrc));
2495 txrc.hw = hw;
e31583cd 2496 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 2497 txrc.bss_conf = &sdata->vif.bss_conf;
2498 txrc.skb = skb;
2499 txrc.reported_rate.idx = -1;
37eb0b16 2500 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
e31583cd 2501 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
37eb0b16
JM		 2502 txrc.max_rate_idx = -1;
2503 else
2504 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
19468413
SW		 2505 memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band],
2506 sizeof(txrc.rate_idx_mcs_mask));
8f0729b1 2507 txrc.bss = true;
e00cfce0 2508 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 2509
2510 info->control.vif = vif;
f591fa5d 2511
a472e71b
JL		 2512 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
2513 IEEE80211_TX_CTL_ASSIGN_SEQ |
2514 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 2515 out:
5dfdaf58 2516 rcu_read_unlock();
e2ebc74d
JB		 2517 return skb;
2518}
eddcbb94 2519EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 2520
02945821
AN		 2521struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
2522 struct ieee80211_vif *vif)
2523{
2524 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 2525 struct sk_buff *skb = NULL;
2526 struct probe_resp *presp = NULL;
02945821
AN		 2527 struct ieee80211_hdr *hdr;
2528 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2529
2530 if (sdata->vif.type != NL80211_IFTYPE_AP)
2531 return NULL;
2532
2533 rcu_read_lock();
2534
2535 ap = &sdata->u.ap;
2536 presp = rcu_dereference(ap->probe_resp);
2537 if (!presp)
2538 goto out;
2539
aa7a0080 2540 skb = dev_alloc_skb(presp->len);
02945821
AN		 2541 if (!skb)
2542 goto out;
2543
aa7a0080
ES		 2544 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
2545
02945821
AN		 2546 hdr = (struct ieee80211_hdr *) skb->data;
2547 memset(hdr->addr1, 0, sizeof(hdr->addr1));
2548
2549out:
2550 rcu_read_unlock();
2551 return skb;
2552}
2553EXPORT_SYMBOL(ieee80211_proberesp_get);
2554
7044cc56
KV		 2555struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
2556 struct ieee80211_vif *vif)
2557{
2558 struct ieee80211_sub_if_data *sdata;
2559 struct ieee80211_if_managed *ifmgd;
2560 struct ieee80211_pspoll *pspoll;
2561 struct ieee80211_local *local;
2562 struct sk_buff *skb;
2563
2564 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2565 return NULL;
2566
2567 sdata = vif_to_sdata(vif);
2568 ifmgd = &sdata->u.mgd;
2569 local = sdata->local;
2570
2571 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 2572 if (!skb)
7044cc56 2573 return NULL;
d15b8459 2574
7044cc56
KV		 2575 skb_reserve(skb, local->hw.extra_tx_headroom);
2576
2577 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
2578 memset(pspoll, 0, sizeof(*pspoll));
2579 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
2580 IEEE80211_STYPE_PSPOLL);
2581 pspoll->aid = cpu_to_le16(ifmgd->aid);
2582
2583 /* aid in PS-Poll has its two MSBs each set to 1 */
2584 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
2585
2586 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
2587 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
2588
2589 return skb;
2590}
2591EXPORT_SYMBOL(ieee80211_pspoll_get);
2592
2593struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
2594 struct ieee80211_vif *vif)
2595{
2596 struct ieee80211_hdr_3addr *nullfunc;
2597 struct ieee80211_sub_if_data *sdata;
2598 struct ieee80211_if_managed *ifmgd;
2599 struct ieee80211_local *local;
2600 struct sk_buff *skb;
2601
2602 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2603 return NULL;
2604
2605 sdata = vif_to_sdata(vif);
2606 ifmgd = &sdata->u.mgd;
2607 local = sdata->local;
2608
2609 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 2610 if (!skb)
7044cc56 2611 return NULL;
d15b8459 2612
7044cc56
KV		 2613 skb_reserve(skb, local->hw.extra_tx_headroom);
2614
2615 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
2616 sizeof(*nullfunc));
2617 memset(nullfunc, 0, sizeof(*nullfunc));
2618 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
2619 IEEE80211_STYPE_NULLFUNC |
2620 IEEE80211_FCTL_TODS);
2621 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
2622 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
2623 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
2624
2625 return skb;
2626}
2627EXPORT_SYMBOL(ieee80211_nullfunc_get);
2628
05e54ea6
KV		 2629struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
2630 struct ieee80211_vif *vif,
2631 const u8 *ssid, size_t ssid_len,
b9a9ada1 2632 size_t tailroom)
05e54ea6
KV		 2633{
2634 struct ieee80211_sub_if_data *sdata;
2635 struct ieee80211_local *local;
2636 struct ieee80211_hdr_3addr *hdr;
2637 struct sk_buff *skb;
2638 size_t ie_ssid_len;
2639 u8 *pos;
2640
2641 sdata = vif_to_sdata(vif);
2642 local = sdata->local;
2643 ie_ssid_len = 2 + ssid_len;
2644
2645 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 2646 ie_ssid_len + tailroom);
d15b8459 2647 if (!skb)
05e54ea6 2648 return NULL;
05e54ea6
KV		 2649
2650 skb_reserve(skb, local->hw.extra_tx_headroom);
2651
2652 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
2653 memset(hdr, 0, sizeof(*hdr));
2654 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2655 IEEE80211_STYPE_PROBE_REQ);
e83e6541 2656 eth_broadcast_addr(hdr->addr1);
05e54ea6 2657 memcpy(hdr->addr2, vif->addr, ETH_ALEN);
e83e6541 2658 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 2659
2660 pos = skb_put(skb, ie_ssid_len);
2661 *pos++ = WLAN_EID_SSID;
2662 *pos++ = ssid_len;
88c868c4 2663 if (ssid_len)
05e54ea6
KV		 2664 memcpy(pos, ssid, ssid_len);
2665 pos += ssid_len;
2666
05e54ea6
KV		 2667 return skb;
2668}
2669EXPORT_SYMBOL(ieee80211_probereq_get);
2670
32bfd35d 2671void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 2672 const void *frame, size_t frame_len,
e039fa4a 2673 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 2674 struct ieee80211_rts *rts)
2675{
2676 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 2677
065e9605
HH		 2678 rts->frame_control =
2679 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 2680 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
2681 frame_txctl);
e2ebc74d
JB		 2682 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
2683 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
2684}
2685EXPORT_SYMBOL(ieee80211_rts_get);
2686
32bfd35d 2687void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 2688 const void *frame, size_t frame_len,
e039fa4a 2689 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 2690 struct ieee80211_cts *cts)
2691{
2692 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 2693
065e9605
HH		 2694 cts->frame_control =
2695 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 2696 cts->duration = ieee80211_ctstoself_duration(hw, vif,
2697 frame_len, frame_txctl);
e2ebc74d
JB		 2698 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
2699}
2700EXPORT_SYMBOL(ieee80211_ctstoself_get);
2701
2702struct sk_buff *
32bfd35d 2703ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 2704 struct ieee80211_vif *vif)
e2ebc74d
JB		 2705{
2706 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 2707 struct sk_buff *skb = NULL;
5cf121c3 2708 struct ieee80211_tx_data tx;
e2ebc74d 2709 struct ieee80211_sub_if_data *sdata;
d012a605 2710 struct ps_data *ps;
e039fa4a 2711 struct ieee80211_tx_info *info;
55de908a 2712 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 2713
32bfd35d 2714 sdata = vif_to_sdata(vif);
5dfdaf58 2715
5dfdaf58 2716 rcu_read_lock();
55de908a 2717 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 2718
d012a605
MP		 2719 if (!chanctx_conf)
2720 goto out;
2721
2722 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2723 struct beacon_data *beacon =
2724 rcu_dereference(sdata->u.ap.beacon);
2725
2726 if (!beacon || !beacon->head)
2727 goto out;
2728
2729 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 2730 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2731 ps = &sdata->u.mesh.ps;
d012a605 2732 } else {
747cf5e9 2733 goto out;
d012a605 2734 }
5dfdaf58 2735
d012a605 2736 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 2737 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 2738
e2ebc74d 2739 while (1) {
d012a605 2740 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 2741 if (!skb)
747cf5e9 2742 goto out;
e2ebc74d
JB		 2743 local->total_ps_buffered--;
2744
d012a605 2745 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 2746 struct ieee80211_hdr *hdr =
2747 (struct ieee80211_hdr *) skb->data;
2748 /* more buffered multicast/broadcast frames ==> set
2749 * MoreData flag in IEEE 802.11 header to inform PS
2750 * STAs */
2751 hdr->frame_control |=
2752 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2753 }
2754
7cbf9d01
MP		 2755 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2756 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
3b8d81e0 2757 if (!ieee80211_tx_prepare(sdata, &tx, skb))
e2ebc74d
JB		 2758 break;
2759 dev_kfree_skb_any(skb);
2760 }
e039fa4a
JB		 2761
2762 info = IEEE80211_SKB_CB(skb);
2763
5cf121c3 2764 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 2765 info->band = chanctx_conf->def.chan->band;
e2ebc74d 2766
97b045d6 2767 if (invoke_tx_handlers(&tx))
e2ebc74d 2768 skb = NULL;
97b045d6 2769 out:
d0709a65 2770 rcu_read_unlock();
e2ebc74d
JB		 2771
2772 return skb;
2773}
2774EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 2775
55de908a
JB		 2776void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
2777 struct sk_buff *skb, int tid,
2778 enum ieee80211_band band)
3b8d81e0 2779{
353d09c6 2780 int ac = ieee802_1d_to_ac[tid & 7];
3a25a8c8 2781
3b8d81e0
JB		 2782 skb_set_mac_header(skb, 0);
2783 skb_set_network_header(skb, 0);
2784 skb_set_transport_header(skb, 0);
2785
3a25a8c8 2786 skb_set_queue_mapping(skb, ac);
cf6bb79a 2787 skb->priority = tid;
cf0277e7 2788
89afe614
JB		 2789 skb->dev = sdata->dev;
2790
3d34deb6
JB		 2791 /*
2792 * The other path calling ieee80211_xmit is from the tasklet,
2793 * and while we can handle concurrent transmissions locking
2794 * requirements are that we do not come into tx with bhs on.
2795 */
2796 local_bh_disable();
55de908a 2797 ieee80211_xmit(sdata, skb, band);
3d34deb6 2798 local_bh_enable();
3b8d81e0 2799}
kernel source for telekom puls (alcatel/mediatek)