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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
e2ebc74d JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * | |
13 | * Transmit and frame generation functions. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/bitmap.h> | |
d4e46a3d | 21 | #include <linux/rcupdate.h> |
bc3b2d7f | 22 | #include <linux/export.h> |
ad38bfc9 | 23 | #include <linux/time.h> |
881d966b | 24 | #include <net/net_namespace.h> |
e2ebc74d JB |
25 | #include <net/ieee80211_radiotap.h> |
26 | #include <net/cfg80211.h> | |
27 | #include <net/mac80211.h> | |
28 | #include <asm/unaligned.h> | |
29 | ||
30 | #include "ieee80211_i.h" | |
24487981 | 31 | #include "driver-ops.h" |
2c8dccc7 | 32 | #include "led.h" |
33b64eb2 | 33 | #include "mesh.h" |
e2ebc74d JB |
34 | #include "wep.h" |
35 | #include "wpa.h" | |
36 | #include "wme.h" | |
2c8dccc7 | 37 | #include "rate.h" |
e2ebc74d | 38 | |
e2ebc74d JB |
39 | /* misc utils */ |
40 | ||
252b86c4 JB |
41 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
42 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 43 | int next_frag_len) |
e2ebc74d | 44 | { |
2103dec1 | 45 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 46 | struct ieee80211_rate *txrate; |
e2ebc74d | 47 | struct ieee80211_local *local = tx->local; |
8318d78a | 48 | struct ieee80211_supported_band *sband; |
358c8d9d | 49 | struct ieee80211_hdr *hdr; |
252b86c4 | 50 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
51 | struct ieee80211_chanctx_conf *chanctx_conf; |
52 | u32 rate_flags = 0; | |
53 | ||
54 | rcu_read_lock(); | |
55 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
56 | if (chanctx_conf) { | |
57 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
58 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
59 | } | |
60 | rcu_read_unlock(); | |
e6a9854b JB |
61 | |
62 | /* assume HW handles this */ | |
0d528d85 | 63 | if (tx->rate.flags & IEEE80211_TX_RC_MCS) |
e6a9854b JB |
64 | return 0; |
65 | ||
66 | /* uh huh? */ | |
0d528d85 | 67 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 68 | return 0; |
e2ebc74d | 69 | |
2d56577b | 70 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 71 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 72 | |
e6a9854b | 73 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
74 | |
75 | /* | |
76 | * data and mgmt (except PS Poll): | |
77 | * - during CFP: 32768 | |
78 | * - during contention period: | |
79 | * if addr1 is group address: 0 | |
80 | * if more fragments = 0 and addr1 is individual address: time to | |
81 | * transmit one ACK plus SIFS | |
82 | * if more fragments = 1 and addr1 is individual address: time to | |
83 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
84 | * | |
85 | * IEEE 802.11, 9.6: | |
86 | * - control response frame (CTS or ACK) shall be transmitted using the | |
87 | * same rate as the immediately previous frame in the frame exchange | |
88 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
89 | * at the highest possible rate belonging to the PHY rates in the | |
90 | * BSSBasicRateSet | |
91 | */ | |
252b86c4 | 92 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 93 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 94 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 95 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
96 | * needs to be updated to support duration field calculation. |
97 | * | |
98 | * RTS: time needed to transmit pending data/mgmt frame plus | |
99 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
100 | * CTS: duration of immediately previous RTS minus time | |
101 | * required to transmit CTS and its SIFS | |
102 | * ACK: 0 if immediately previous directed data/mgmt had | |
103 | * more=0, with more=1 duration in ACK frame is duration | |
104 | * from previous frame minus time needed to transmit ACK | |
105 | * and its SIFS | |
106 | * PS Poll: BIT(15) | BIT(14) | aid | |
107 | */ | |
108 | return 0; | |
109 | } | |
110 | ||
111 | /* data/mgmt */ | |
112 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 113 | return cpu_to_le16(32768); |
e2ebc74d JB |
114 | |
115 | if (group_addr) /* Group address as the destination - no ACK */ | |
116 | return 0; | |
117 | ||
118 | /* Individual destination address: | |
119 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
120 | * CTS and ACK frames shall be transmitted using the highest rate in | |
121 | * basic rate set that is less than or equal to the rate of the | |
122 | * immediately previous frame and that is using the same modulation | |
123 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
124 | * the highest mandatory rate of the PHY that is less than or equal to | |
125 | * the rate of the previous frame is used. | |
126 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
127 | */ | |
128 | rate = -1; | |
8318d78a JB |
129 | /* use lowest available if everything fails */ |
130 | mrate = sband->bitrates[0].bitrate; | |
131 | for (i = 0; i < sband->n_bitrates; i++) { | |
132 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 133 | |
8318d78a JB |
134 | if (r->bitrate > txrate->bitrate) |
135 | break; | |
e2ebc74d | 136 | |
2103dec1 SW |
137 | if ((rate_flags & r->flags) != rate_flags) |
138 | continue; | |
139 | ||
bda3933a | 140 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 141 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
142 | |
143 | switch (sband->band) { | |
144 | case IEEE80211_BAND_2GHZ: { | |
145 | u32 flag; | |
146 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
147 | flag = IEEE80211_RATE_MANDATORY_G; | |
148 | else | |
149 | flag = IEEE80211_RATE_MANDATORY_B; | |
150 | if (r->flags & flag) | |
151 | mrate = r->bitrate; | |
152 | break; | |
153 | } | |
154 | case IEEE80211_BAND_5GHZ: | |
155 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
156 | mrate = r->bitrate; | |
157 | break; | |
3a0c52a6 VK |
158 | case IEEE80211_BAND_60GHZ: |
159 | /* TODO, for now fall through */ | |
8318d78a JB |
160 | case IEEE80211_NUM_BANDS: |
161 | WARN_ON(1); | |
162 | break; | |
163 | } | |
e2ebc74d JB |
164 | } |
165 | if (rate == -1) { | |
166 | /* No matching basic rate found; use highest suitable mandatory | |
167 | * PHY rate */ | |
2103dec1 | 168 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
169 | } |
170 | ||
6674f210 SW |
171 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
172 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 173 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
174 | dur = 0; |
175 | else | |
176 | /* Time needed to transmit ACK | |
177 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
178 | * to closest integer */ | |
4ee73f33 | 179 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
180 | tx->sdata->vif.bss_conf.use_short_preamble, |
181 | shift); | |
e2ebc74d JB |
182 | |
183 | if (next_frag_len) { | |
184 | /* Frame is fragmented: duration increases with time needed to | |
185 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
186 | dur *= 2; /* ACK + SIFS */ | |
187 | /* next fragment */ | |
4ee73f33 | 188 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 189 | txrate->bitrate, erp, |
438b61b7 SW |
190 | tx->sdata->vif.bss_conf.use_short_preamble, |
191 | shift); | |
e2ebc74d JB |
192 | } |
193 | ||
03f93c3d | 194 | return cpu_to_le16(dur); |
e2ebc74d JB |
195 | } |
196 | ||
e2ebc74d | 197 | /* tx handlers */ |
5c1b98a5 KV |
198 | static ieee80211_tx_result debug_noinline |
199 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
200 | { | |
201 | struct ieee80211_local *local = tx->local; | |
0c74211d | 202 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
203 | |
204 | /* driver doesn't support power save */ | |
205 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
206 | return TX_CONTINUE; | |
207 | ||
208 | /* hardware does dynamic power save */ | |
209 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
210 | return TX_CONTINUE; | |
211 | ||
212 | /* dynamic power save disabled */ | |
213 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
214 | return TX_CONTINUE; | |
215 | ||
216 | /* we are scanning, don't enable power save */ | |
217 | if (local->scanning) | |
218 | return TX_CONTINUE; | |
219 | ||
220 | if (!local->ps_sdata) | |
221 | return TX_CONTINUE; | |
222 | ||
223 | /* No point if we're going to suspend */ | |
224 | if (local->quiescing) | |
225 | return TX_CONTINUE; | |
226 | ||
0c74211d KV |
227 | /* dynamic ps is supported only in managed mode */ |
228 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
229 | return TX_CONTINUE; | |
230 | ||
231 | ifmgd = &tx->sdata->u.mgd; | |
232 | ||
233 | /* | |
234 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
235 | * u-apsd enabled and the frame is in voip class. This effectively | |
236 | * means that even if all access categories have u-apsd enabled, in | |
237 | * practise u-apsd is only used with the voip ac. This is a | |
238 | * workaround for the case when received voip class packets do not | |
239 | * have correct qos tag for some reason, due the network or the | |
240 | * peer application. | |
241 | * | |
dc41e4d4 | 242 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
243 | * changed via debugfs, user needs to reassociate manually to have |
244 | * everything in sync. | |
245 | */ | |
4875d30d JB |
246 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
247 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
248 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
249 | return TX_CONTINUE; |
250 | ||
5c1b98a5 KV |
251 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
252 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 253 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
254 | IEEE80211_QUEUE_STOP_REASON_PS, |
255 | false); | |
db28569a | 256 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
257 | ieee80211_queue_work(&local->hw, |
258 | &local->dynamic_ps_disable_work); | |
259 | } | |
260 | ||
5db1c07c LC |
261 | /* Don't restart the timer if we're not disassociated */ |
262 | if (!ifmgd->associated) | |
263 | return TX_CONTINUE; | |
264 | ||
5c1b98a5 KV |
265 | mod_timer(&local->dynamic_ps_timer, jiffies + |
266 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
267 | ||
268 | return TX_CONTINUE; | |
269 | } | |
e2ebc74d | 270 | |
d9e8a70f | 271 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 272 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 273 | { |
358c8d9d | 274 | |
e039fa4a | 275 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 276 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 277 | bool assoc = false; |
e2ebc74d | 278 | |
e039fa4a | 279 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 280 | return TX_CONTINUE; |
58d4185e | 281 | |
b23b025f BG |
282 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
283 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
284 | !ieee80211_is_probe_req(hdr->frame_control) && |
285 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
286 | /* | |
287 | * When software scanning only nullfunc frames (to notify | |
288 | * the sleep state to the AP) and probe requests (for the | |
289 | * active scan) are allowed, all other frames should not be | |
290 | * sent and we should not get here, but if we do | |
291 | * nonetheless, drop them to avoid sending them | |
292 | * off-channel. See the link below and | |
293 | * ieee80211_start_scan() for more. | |
294 | * | |
295 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
296 | */ | |
9ae54c84 | 297 | return TX_DROP; |
e2ebc74d | 298 | |
239281f8 RL |
299 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
300 | return TX_CONTINUE; | |
301 | ||
1be7fe8d BJ |
302 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
303 | return TX_CONTINUE; | |
304 | ||
05c914fe | 305 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
306 | return TX_CONTINUE; |
307 | ||
5cf121c3 | 308 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 309 | return TX_CONTINUE; |
e2ebc74d | 310 | |
c2c98fde JB |
311 | if (tx->sta) |
312 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 313 | |
5cf121c3 | 314 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 315 | if (unlikely(!assoc && |
358c8d9d | 316 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 317 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
318 | sdata_info(tx->sdata, |
319 | "dropped data frame to not associated station %pM\n", | |
320 | hdr->addr1); | |
321 | #endif | |
e2ebc74d | 322 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 323 | return TX_DROP; |
e2ebc74d | 324 | } |
29623892 JB |
325 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
326 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 327 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
328 | /* |
329 | * No associated STAs - no need to send multicast | |
330 | * frames. | |
331 | */ | |
332 | return TX_DROP; | |
e2ebc74d JB |
333 | } |
334 | ||
9ae54c84 | 335 | return TX_CONTINUE; |
e2ebc74d JB |
336 | } |
337 | ||
e2ebc74d JB |
338 | /* This function is called whenever the AP is about to exceed the maximum limit |
339 | * of buffered frames for power saving STAs. This situation should not really | |
340 | * happen often during normal operation, so dropping the oldest buffered packet | |
341 | * from each queue should be OK to make some room for new frames. */ | |
342 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
343 | { | |
344 | int total = 0, purged = 0; | |
345 | struct sk_buff *skb; | |
346 | struct ieee80211_sub_if_data *sdata; | |
347 | struct sta_info *sta; | |
348 | ||
79010420 | 349 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
350 | struct ps_data *ps; |
351 | ||
352 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
353 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
354 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
355 | ps = &sdata->u.mesh.ps; | |
d012a605 | 356 | else |
e2ebc74d | 357 | continue; |
d012a605 MP |
358 | |
359 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
360 | if (skb) { |
361 | purged++; | |
362 | dev_kfree_skb(skb); | |
363 | } | |
d012a605 | 364 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 365 | } |
e2ebc74d | 366 | |
948d887d JB |
367 | /* |
368 | * Drop one frame from each station from the lowest-priority | |
369 | * AC that has frames at all. | |
370 | */ | |
d0709a65 | 371 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
372 | int ac; |
373 | ||
374 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
375 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
376 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
377 | if (skb) { | |
378 | purged++; | |
c3e7724b | 379 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
380 | break; |
381 | } | |
e2ebc74d | 382 | } |
e2ebc74d | 383 | } |
d0709a65 | 384 | |
e2ebc74d | 385 | local->total_ps_buffered = total; |
bdcbd8e0 | 386 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
387 | } |
388 | ||
9ae54c84 | 389 | static ieee80211_tx_result |
5cf121c3 | 390 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 391 | { |
e039fa4a | 392 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 393 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 394 | struct ps_data *ps; |
e039fa4a | 395 | |
7d54d0dd JB |
396 | /* |
397 | * broadcast/multicast frame | |
398 | * | |
3f52b7e3 | 399 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
400 | * the frame is buffered to be sent after DTIM beacon frame. |
401 | * This is done either by the hardware or us. | |
402 | */ | |
403 | ||
3f52b7e3 | 404 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
405 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
406 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
407 | if (!tx->sdata->bss) | |
408 | return TX_CONTINUE; | |
409 | ||
410 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
411 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
412 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 413 | } else { |
3e122be0 | 414 | return TX_CONTINUE; |
d012a605 MP |
415 | } |
416 | ||
3e122be0 JB |
417 | |
418 | /* no buffering for ordered frames */ | |
358c8d9d | 419 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 420 | return TX_CONTINUE; |
7d54d0dd | 421 | |
08b99399 JB |
422 | if (ieee80211_is_probe_req(hdr->frame_control)) |
423 | return TX_CONTINUE; | |
424 | ||
f4d57941 JB |
425 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
426 | info->hw_queue = tx->sdata->vif.cab_queue; | |
427 | ||
7d54d0dd | 428 | /* no stations in PS mode */ |
d012a605 | 429 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 430 | return TX_CONTINUE; |
7d54d0dd | 431 | |
62b517cb | 432 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 433 | |
62b517cb JB |
434 | /* device releases frame after DTIM beacon */ |
435 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 436 | return TX_CONTINUE; |
62b1208e | 437 | |
7d54d0dd | 438 | /* buffered in mac80211 */ |
62b1208e JB |
439 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
440 | purge_old_ps_buffers(tx->local); | |
441 | ||
d012a605 | 442 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
443 | ps_dbg(tx->sdata, |
444 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 445 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
446 | } else |
447 | tx->local->total_ps_buffered++; | |
e2ebc74d | 448 | |
d012a605 | 449 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 450 | |
62b1208e | 451 | return TX_QUEUED; |
e2ebc74d JB |
452 | } |
453 | ||
fb733336 JM |
454 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
455 | struct sk_buff *skb) | |
456 | { | |
457 | if (!ieee80211_is_mgmt(fc)) | |
458 | return 0; | |
459 | ||
c2c98fde | 460 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
461 | return 0; |
462 | ||
d8ca16db | 463 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
464 | return 0; |
465 | ||
466 | return 1; | |
467 | } | |
468 | ||
9ae54c84 | 469 | static ieee80211_tx_result |
5cf121c3 | 470 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
471 | { |
472 | struct sta_info *sta = tx->sta; | |
e039fa4a | 473 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 474 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 475 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 476 | |
02f2f1a9 | 477 | if (unlikely(!sta)) |
9ae54c84 | 478 | return TX_CONTINUE; |
e2ebc74d | 479 | |
c2c98fde | 480 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
481 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
482 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 483 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
484 | int ac = skb_get_queue_mapping(tx->skb); |
485 | ||
08b99399 JB |
486 | if (ieee80211_is_mgmt(hdr->frame_control) && |
487 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
488 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
489 | return TX_CONTINUE; | |
490 | } | |
491 | ||
bdcbd8e0 JB |
492 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
493 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
494 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
495 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
496 | |
497 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
498 | spin_lock(&sta->ps_lock); | |
499 | /* | |
500 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
501 | * been queued to pending queue. No reordering can happen, go | |
502 | * ahead and Tx the packet. | |
503 | */ | |
504 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
505 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
506 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
507 | spin_unlock(&sta->ps_lock); |
508 | return TX_CONTINUE; | |
509 | } | |
510 | ||
948d887d JB |
511 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
512 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
513 | ps_dbg(tx->sdata, |
514 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
515 | sta->sta.addr, ac); | |
c3e7724b | 516 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
517 | } else |
518 | tx->local->total_ps_buffered++; | |
004c872e | 519 | |
e039fa4a | 520 | info->control.jiffies = jiffies; |
5061b0c2 | 521 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 522 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
03c8c06f | 523 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 524 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 525 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
526 | |
527 | if (!timer_pending(&local->sta_cleanup)) | |
528 | mod_timer(&local->sta_cleanup, | |
529 | round_jiffies(jiffies + | |
530 | STA_INFO_CLEANUP_INTERVAL)); | |
531 | ||
c868cb35 JB |
532 | /* |
533 | * We queued up some frames, so the TIM bit might | |
534 | * need to be set, recalculate it. | |
535 | */ | |
536 | sta_info_recalc_tim(sta); | |
537 | ||
9ae54c84 | 538 | return TX_QUEUED; |
bdcbd8e0 JB |
539 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
540 | ps_dbg(tx->sdata, | |
541 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
542 | sta->sta.addr); | |
e2ebc74d | 543 | } |
e2ebc74d | 544 | |
9ae54c84 | 545 | return TX_CONTINUE; |
e2ebc74d JB |
546 | } |
547 | ||
d9e8a70f | 548 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 549 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 550 | { |
5cf121c3 | 551 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 552 | return TX_CONTINUE; |
e2ebc74d | 553 | |
5cf121c3 | 554 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
555 | return ieee80211_tx_h_unicast_ps_buf(tx); |
556 | else | |
557 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
558 | } | |
559 | ||
a621fa4d JB |
560 | static ieee80211_tx_result debug_noinline |
561 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
562 | { | |
563 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
564 | ||
af61a165 JB |
565 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
566 | if (tx->sdata->control_port_no_encrypt) | |
567 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
568 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
569 | } | |
a621fa4d JB |
570 | |
571 | return TX_CONTINUE; | |
572 | } | |
573 | ||
d9e8a70f | 574 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 575 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 576 | { |
46e6de15 | 577 | struct ieee80211_key *key; |
e039fa4a | 578 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 579 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 580 | |
3b8d81e0 | 581 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 582 | tx->key = NULL; |
2475b1cc MS |
583 | else if (tx->sta && |
584 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 585 | tx->key = key; |
3cfcf6ac | 586 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 587 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 588 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
589 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
590 | tx->key = key; | |
f7e0104c JB |
591 | else if (is_multicast_ether_addr(hdr->addr1) && |
592 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
593 | tx->key = key; | |
594 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
595 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 596 | tx->key = key; |
46e6de15 JB |
597 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
598 | tx->key = NULL; | |
599 | else if (!tx->sdata->drop_unencrypted) | |
600 | tx->key = NULL; | |
601 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
602 | tx->key = NULL; | |
d8ca16db | 603 | else if (ieee80211_is_robust_mgmt_frame(tx->skb) && |
46e6de15 JB |
604 | !(ieee80211_is_action(hdr->frame_control) && |
605 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
606 | tx->key = NULL; | |
4922f71f | 607 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
d8ca16db | 608 | !ieee80211_is_robust_mgmt_frame(tx->skb)) |
4922f71f | 609 | tx->key = NULL; |
46e6de15 | 610 | else { |
e2ebc74d | 611 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 612 | return TX_DROP; |
46e6de15 | 613 | } |
e2ebc74d JB |
614 | |
615 | if (tx->key) { | |
813d7669 JB |
616 | bool skip_hw = false; |
617 | ||
e2ebc74d | 618 | tx->key->tx_rx_count++; |
011bfcc4 | 619 | /* TODO: add threshold stuff again */ |
176e4f84 | 620 | |
97359d12 JB |
621 | switch (tx->key->conf.cipher) { |
622 | case WLAN_CIPHER_SUITE_WEP40: | |
623 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 624 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 625 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
626 | tx->key = NULL; |
627 | break; | |
97359d12 | 628 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
629 | if (!ieee80211_is_data_present(hdr->frame_control) && |
630 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
631 | tx->skb)) | |
632 | tx->key = NULL; | |
3b43a187 KV |
633 | else |
634 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 635 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 636 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 637 | break; |
97359d12 | 638 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
639 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
640 | tx->key = NULL; | |
641 | break; | |
176e4f84 | 642 | } |
813d7669 | 643 | |
e54faf29 JB |
644 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
645 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
646 | return TX_DROP; |
647 | ||
f12553eb | 648 | if (!skip_hw && tx->key && |
382b1655 | 649 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 650 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
651 | } |
652 | ||
9ae54c84 | 653 | return TX_CONTINUE; |
e2ebc74d JB |
654 | } |
655 | ||
d9e8a70f | 656 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 657 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 658 | { |
e039fa4a | 659 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
660 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
661 | struct ieee80211_supported_band *sband; | |
a2c40249 | 662 | u32 len; |
e6a9854b | 663 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 664 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 665 | bool assoc = false; |
8318d78a | 666 | |
e6a9854b | 667 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 668 | |
2d56577b | 669 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 670 | |
a2c40249 | 671 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 672 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
673 | |
674 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 675 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
676 | txrc.sband = sband; |
677 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
678 | txrc.skb = tx->skb; | |
679 | txrc.reported_rate.idx = -1; | |
2d56577b | 680 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
681 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
682 | txrc.max_rate_idx = -1; | |
683 | else | |
684 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
685 | |
686 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
687 | txrc.rate_idx_mcs_mask = | |
688 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
689 | ||
8f0729b1 | 690 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 691 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 692 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
693 | |
694 | /* set up RTS protection if desired */ | |
b9a5f8ca | 695 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 696 | txrc.rts = true; |
e2ebc74d | 697 | } |
e2ebc74d | 698 | |
0d528d85 | 699 | info->control.use_rts = txrc.rts; |
991fec09 FF |
700 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
701 | ||
e6a9854b JB |
702 | /* |
703 | * Use short preamble if the BSS can handle it, but not for | |
704 | * management frames unless we know the receiver can handle | |
705 | * that -- the management frame might be to a station that | |
706 | * just wants a probe response. | |
707 | */ | |
708 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
709 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 710 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
711 | txrc.short_preamble = true; |
712 | ||
713 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 714 | |
c2c98fde JB |
715 | if (tx->sta) |
716 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
717 | |
718 | /* | |
719 | * Lets not bother rate control if we're associated and cannot | |
720 | * talk to the sta. This should not happen. | |
721 | */ | |
c2c98fde | 722 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
723 | !rate_usable_index_exists(sband, &tx->sta->sta), |
724 | "%s: Dropped data frame as no usable bitrate found while " | |
725 | "scanning and associated. Target station: " | |
726 | "%pM on %d GHz band\n", | |
47846c9b | 727 | tx->sdata->name, hdr->addr1, |
2d56577b | 728 | info->band ? 5 : 2)) |
b770b43e | 729 | return TX_DROP; |
2e92e6f2 | 730 | |
b770b43e LR |
731 | /* |
732 | * If we're associated with the sta at this point we know we can at | |
733 | * least send the frame at the lowest bit rate. | |
734 | */ | |
e6a9854b JB |
735 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
736 | ||
0d528d85 FF |
737 | if (tx->sta && !info->control.skip_table) |
738 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
739 | ||
740 | if (unlikely(info->control.rates[0].idx < 0)) { | |
741 | if (ratetbl) { | |
742 | struct ieee80211_tx_rate rate = { | |
743 | .idx = ratetbl->rate[0].idx, | |
744 | .flags = ratetbl->rate[0].flags, | |
745 | .count = ratetbl->rate[0].count | |
746 | }; | |
747 | ||
748 | if (ratetbl->rate[0].idx < 0) | |
749 | return TX_DROP; | |
750 | ||
751 | tx->rate = rate; | |
752 | } else { | |
753 | return TX_DROP; | |
754 | } | |
755 | } else { | |
756 | tx->rate = info->control.rates[0]; | |
757 | } | |
e6a9854b | 758 | |
c1ce5a74 | 759 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 760 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
761 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
762 | tx->sta->last_tx_rate = txrc.reported_rate; | |
763 | } else if (tx->sta) | |
e6a9854b | 764 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 765 | |
0d528d85 FF |
766 | if (ratetbl) |
767 | return TX_CONTINUE; | |
768 | ||
e6a9854b JB |
769 | if (unlikely(!info->control.rates[0].count)) |
770 | info->control.rates[0].count = 1; | |
e2ebc74d | 771 | |
9955151d GS |
772 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
773 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
774 | info->control.rates[0].count = 1; | |
775 | ||
e6a9854b JB |
776 | return TX_CONTINUE; |
777 | } | |
778 | ||
f591fa5d JB |
779 | static ieee80211_tx_result debug_noinline |
780 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
781 | { | |
782 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
783 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
784 | u16 *seq; | |
785 | u8 *qc; | |
786 | int tid; | |
787 | ||
25d834e1 JB |
788 | /* |
789 | * Packet injection may want to control the sequence | |
790 | * number, if we have no matching interface then we | |
791 | * neither assign one ourselves nor ask the driver to. | |
792 | */ | |
5061b0c2 | 793 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
794 | return TX_CONTINUE; |
795 | ||
f591fa5d JB |
796 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
797 | return TX_CONTINUE; | |
798 | ||
799 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
800 | return TX_CONTINUE; | |
801 | ||
49a59543 JB |
802 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
803 | return TX_CONTINUE; | |
804 | ||
94778280 JB |
805 | /* |
806 | * Anything but QoS data that has a sequence number field | |
807 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
808 | * counter. QoS data frames with a multicast destination |
809 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 810 | */ |
c4c205f3 BC |
811 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
812 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 813 | /* driver should assign sequence number */ |
f591fa5d | 814 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
815 | /* for pure STA mode without beacons, we can do it */ |
816 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
817 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
818 | return TX_CONTINUE; |
819 | } | |
820 | ||
821 | /* | |
822 | * This should be true for injected/management frames only, for | |
823 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
824 | * above since they are not QoS-data frames. | |
825 | */ | |
826 | if (!tx->sta) | |
827 | return TX_CONTINUE; | |
828 | ||
829 | /* include per-STA, per-TID sequence counter */ | |
830 | ||
831 | qc = ieee80211_get_qos_ctl(hdr); | |
832 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
833 | seq = &tx->sta->tid_seq[tid]; | |
834 | ||
835 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
836 | ||
837 | /* Increase the sequence number. */ | |
838 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
839 | ||
840 | return TX_CONTINUE; | |
841 | } | |
842 | ||
252b86c4 | 843 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
844 | struct sk_buff *skb, int hdrlen, |
845 | int frag_threshold) | |
846 | { | |
252b86c4 | 847 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 848 | struct ieee80211_tx_info *info; |
252b86c4 | 849 | struct sk_buff *tmp; |
2de8e0d9 JB |
850 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
851 | int pos = hdrlen + per_fragm; | |
852 | int rem = skb->len - hdrlen - per_fragm; | |
853 | ||
854 | if (WARN_ON(rem < 0)) | |
855 | return -EINVAL; | |
856 | ||
252b86c4 JB |
857 | /* first fragment was already added to queue by caller */ |
858 | ||
2de8e0d9 JB |
859 | while (rem) { |
860 | int fraglen = per_fragm; | |
861 | ||
862 | if (fraglen > rem) | |
863 | fraglen = rem; | |
864 | rem -= fraglen; | |
865 | tmp = dev_alloc_skb(local->tx_headroom + | |
866 | frag_threshold + | |
2475b1cc | 867 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
868 | IEEE80211_ENCRYPT_TAILROOM); |
869 | if (!tmp) | |
870 | return -ENOMEM; | |
252b86c4 JB |
871 | |
872 | __skb_queue_tail(&tx->skbs, tmp); | |
873 | ||
2475b1cc MS |
874 | skb_reserve(tmp, |
875 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
876 | ||
2de8e0d9 JB |
877 | /* copy control information */ |
878 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
879 | |
880 | info = IEEE80211_SKB_CB(tmp); | |
881 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
882 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
883 | ||
884 | if (rem) | |
885 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
886 | ||
2de8e0d9 JB |
887 | skb_copy_queue_mapping(tmp, skb); |
888 | tmp->priority = skb->priority; | |
2de8e0d9 | 889 | tmp->dev = skb->dev; |
2de8e0d9 JB |
890 | |
891 | /* copy header and data */ | |
892 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
893 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
894 | ||
895 | pos += fraglen; | |
896 | } | |
897 | ||
252b86c4 | 898 | /* adjust first fragment's length */ |
338f977f | 899 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
900 | return 0; |
901 | } | |
902 | ||
d9e8a70f | 903 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
904 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
905 | { | |
2de8e0d9 JB |
906 | struct sk_buff *skb = tx->skb; |
907 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
908 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 909 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
910 | int hdrlen; |
911 | int fragnum; | |
e2454948 | 912 | |
252b86c4 JB |
913 | /* no matter what happens, tx->skb moves to tx->skbs */ |
914 | __skb_queue_tail(&tx->skbs, skb); | |
915 | tx->skb = NULL; | |
916 | ||
a26eb27a JB |
917 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
918 | return TX_CONTINUE; | |
919 | ||
920 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
921 | return TX_CONTINUE; |
922 | ||
eefce91a JB |
923 | /* |
924 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 925 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 926 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 927 | */ |
8b30b1fe | 928 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
929 | return TX_DROP; |
930 | ||
065e9605 | 931 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 932 | |
a26eb27a | 933 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 934 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 935 | return TX_DROP; |
e6a9854b | 936 | |
2de8e0d9 JB |
937 | /* |
938 | * Now fragment the frame. This will allocate all the fragments and | |
939 | * chain them (using skb as the first fragment) to skb->next. | |
940 | * During transmission, we will remove the successfully transmitted | |
941 | * fragments from this list. When the low-level driver rejects one | |
942 | * of the fragments then we will simply pretend to accept the skb | |
943 | * but store it away as pending. | |
944 | */ | |
252b86c4 | 945 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 946 | return TX_DROP; |
e6a9854b | 947 | |
2de8e0d9 JB |
948 | /* update duration/seq/flags of fragments */ |
949 | fragnum = 0; | |
252b86c4 JB |
950 | |
951 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 952 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 953 | |
2de8e0d9 JB |
954 | hdr = (void *)skb->data; |
955 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 956 | |
252b86c4 | 957 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 958 | hdr->frame_control |= morefrags; |
e6a9854b JB |
959 | /* |
960 | * No multi-rate retries for fragmented frames, that | |
961 | * would completely throw off the NAV at other STAs. | |
962 | */ | |
963 | info->control.rates[1].idx = -1; | |
964 | info->control.rates[2].idx = -1; | |
965 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 966 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 967 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
968 | } else { |
969 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 970 | } |
2de8e0d9 JB |
971 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
972 | fragnum++; | |
252b86c4 | 973 | } |
e2ebc74d | 974 | |
9ae54c84 | 975 | return TX_CONTINUE; |
e2ebc74d JB |
976 | } |
977 | ||
feff1f2f JB |
978 | static ieee80211_tx_result debug_noinline |
979 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
980 | { | |
252b86c4 | 981 | struct sk_buff *skb; |
560d2682 | 982 | int ac = -1; |
feff1f2f JB |
983 | |
984 | if (!tx->sta) | |
985 | return TX_CONTINUE; | |
986 | ||
252b86c4 | 987 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 988 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 989 | tx->sta->tx_fragments++; |
560d2682 | 990 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 991 | } |
560d2682 JB |
992 | if (ac >= 0) |
993 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
994 | |
995 | return TX_CONTINUE; | |
996 | } | |
997 | ||
d9e8a70f | 998 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
999 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1000 | { | |
1001 | if (!tx->key) | |
1002 | return TX_CONTINUE; | |
1003 | ||
97359d12 JB |
1004 | switch (tx->key->conf.cipher) { |
1005 | case WLAN_CIPHER_SUITE_WEP40: | |
1006 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1007 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1008 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1009 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1010 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 1011 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 1012 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1013 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 1014 | default: |
d32a1028 | 1015 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1016 | } |
1017 | ||
e2454948 JB |
1018 | return TX_DROP; |
1019 | } | |
1020 | ||
d9e8a70f | 1021 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1022 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1023 | { | |
252b86c4 | 1024 | struct sk_buff *skb; |
2de8e0d9 JB |
1025 | struct ieee80211_hdr *hdr; |
1026 | int next_len; | |
1027 | bool group_addr; | |
03f93c3d | 1028 | |
252b86c4 | 1029 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1030 | hdr = (void *) skb->data; |
7e0aae47 JM |
1031 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1032 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1033 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1034 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1035 | next_len = next->len; | |
1036 | } else | |
1037 | next_len = 0; | |
2de8e0d9 | 1038 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1039 | |
2de8e0d9 | 1040 | hdr->duration_id = |
252b86c4 JB |
1041 | ieee80211_duration(tx, skb, group_addr, next_len); |
1042 | } | |
03f93c3d JB |
1043 | |
1044 | return TX_CONTINUE; | |
1045 | } | |
1046 | ||
e2ebc74d JB |
1047 | /* actual transmit path */ |
1048 | ||
a622ab72 JB |
1049 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1050 | struct sk_buff *skb, | |
1051 | struct ieee80211_tx_info *info, | |
1052 | struct tid_ampdu_tx *tid_tx, | |
1053 | int tid) | |
1054 | { | |
1055 | bool queued = false; | |
285fa695 | 1056 | bool reset_agg_timer = false; |
aa454580 | 1057 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1058 | |
1059 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1060 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1061 | reset_agg_timer = true; |
0ab33703 JB |
1062 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1063 | /* | |
1064 | * nothing -- this aggregation session is being started | |
1065 | * but that might still fail with the driver | |
1066 | */ | |
a622ab72 JB |
1067 | } else { |
1068 | spin_lock(&tx->sta->lock); | |
1069 | /* | |
1070 | * Need to re-check now, because we may get here | |
1071 | * | |
1072 | * 1) in the window during which the setup is actually | |
1073 | * already done, but not marked yet because not all | |
1074 | * packets are spliced over to the driver pending | |
1075 | * queue yet -- if this happened we acquire the lock | |
1076 | * either before or after the splice happens, but | |
1077 | * need to recheck which of these cases happened. | |
1078 | * | |
1079 | * 2) during session teardown, if the OPERATIONAL bit | |
1080 | * was cleared due to the teardown but the pointer | |
1081 | * hasn't been assigned NULL yet (or we loaded it | |
1082 | * before it was assigned) -- in this case it may | |
1083 | * now be NULL which means we should just let the | |
1084 | * packet pass through because splicing the frames | |
1085 | * back is already done. | |
1086 | */ | |
40b275b6 | 1087 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1088 | |
1089 | if (!tid_tx) { | |
1090 | /* do nothing, let packet pass through */ | |
1091 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1092 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1093 | reset_agg_timer = true; |
a622ab72 JB |
1094 | } else { |
1095 | queued = true; | |
1096 | info->control.vif = &tx->sdata->vif; | |
1097 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
03c8c06f | 1098 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1099 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1100 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1101 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1102 | } |
1103 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1104 | |
1105 | if (purge_skb) | |
c3e7724b | 1106 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1107 | } |
1108 | ||
285fa695 NM |
1109 | /* reset session timer */ |
1110 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1111 | tid_tx->last_tx = jiffies; |
285fa695 | 1112 | |
a622ab72 JB |
1113 | return queued; |
1114 | } | |
1115 | ||
58d4185e JB |
1116 | /* |
1117 | * initialises @tx | |
1118 | */ | |
9ae54c84 | 1119 | static ieee80211_tx_result |
3b8d81e0 JB |
1120 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1121 | struct ieee80211_tx_data *tx, | |
1122 | struct sk_buff *skb) | |
e2ebc74d | 1123 | { |
3b8d81e0 | 1124 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1125 | struct ieee80211_hdr *hdr; |
e039fa4a | 1126 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1127 | int tid; |
a622ab72 | 1128 | u8 *qc; |
e2ebc74d JB |
1129 | |
1130 | memset(tx, 0, sizeof(*tx)); | |
1131 | tx->skb = skb; | |
e2ebc74d | 1132 | tx->local = local; |
3b8d81e0 | 1133 | tx->sdata = sdata; |
252b86c4 | 1134 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1135 | |
cd8ffc80 JB |
1136 | /* |
1137 | * If this flag is set to true anywhere, and we get here, | |
1138 | * we are doing the needed processing, so remove the flag | |
1139 | * now. | |
1140 | */ | |
1141 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1142 | ||
58d4185e JB |
1143 | hdr = (struct ieee80211_hdr *) skb->data; |
1144 | ||
3f0e0b22 | 1145 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1146 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1147 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1148 | return TX_DROP; | |
03bb7f42 FF |
1149 | } else if (info->flags & (IEEE80211_TX_CTL_INJECTED | |
1150 | IEEE80211_TX_INTFL_NL80211_FRAME_TX) || | |
66f2c99a | 1151 | tx->sdata->control_port_protocol == tx->skb->protocol) { |
b4d57adb | 1152 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1153 | } |
f14543ee | 1154 | if (!tx->sta) |
abe60632 | 1155 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1156 | |
cd8ffc80 | 1157 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1158 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1159 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1160 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1161 | struct tid_ampdu_tx *tid_tx; |
1162 | ||
8b30b1fe S |
1163 | qc = ieee80211_get_qos_ctl(hdr); |
1164 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1165 | ||
a622ab72 JB |
1166 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1167 | if (tid_tx) { | |
1168 | bool queued; | |
cd8ffc80 | 1169 | |
a622ab72 JB |
1170 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1171 | tid_tx, tid); | |
1172 | ||
1173 | if (unlikely(queued)) | |
1174 | return TX_QUEUED; | |
1175 | } | |
8b30b1fe S |
1176 | } |
1177 | ||
badffb72 | 1178 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1179 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1180 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1181 | } else |
5cf121c3 | 1182 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1183 | |
a26eb27a JB |
1184 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1185 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1186 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1187 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1188 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1189 | } |
1190 | ||
e2ebc74d | 1191 | if (!tx->sta) |
e039fa4a | 1192 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1193 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1194 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1195 | |
e039fa4a | 1196 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1197 | |
9ae54c84 | 1198 | return TX_CONTINUE; |
e2ebc74d JB |
1199 | } |
1200 | ||
11127e91 JB |
1201 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1202 | struct ieee80211_vif *vif, | |
1203 | struct ieee80211_sta *sta, | |
1204 | struct sk_buff_head *skbs, | |
1205 | bool txpending) | |
e2ebc74d | 1206 | { |
36323f81 | 1207 | struct ieee80211_tx_control control; |
252b86c4 | 1208 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1209 | unsigned long flags; |
e2ebc74d | 1210 | |
252b86c4 | 1211 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1212 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1213 | int q = info->hw_queue; | |
1214 | ||
1215 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1216 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1217 | __skb_unlink(skb, skbs); | |
c3e7724b | 1218 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1219 | continue; |
1220 | } | |
1221 | #endif | |
3b8d81e0 JB |
1222 | |
1223 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1224 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1225 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1226 | if (unlikely(info->flags & |
a7679ed5 SF |
1227 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1228 | if (local->queue_stop_reasons[q] & | |
1229 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1230 | /* | |
1231 | * Drop off-channel frames if queues | |
1232 | * are stopped for any reason other | |
1233 | * than off-channel operation. Never | |
1234 | * queue them. | |
1235 | */ | |
1236 | spin_unlock_irqrestore( | |
1237 | &local->queue_stop_reason_lock, | |
1238 | flags); | |
1239 | ieee80211_purge_tx_queue(&local->hw, | |
1240 | skbs); | |
1241 | return true; | |
1242 | } | |
1243 | } else { | |
1244 | ||
6c17b77b | 1245 | /* |
a7679ed5 SF |
1246 | * Since queue is stopped, queue up frames for |
1247 | * later transmission from the tx-pending | |
1248 | * tasklet when the queue is woken again. | |
6c17b77b | 1249 | */ |
a7679ed5 SF |
1250 | if (txpending) |
1251 | skb_queue_splice_init(skbs, | |
1252 | &local->pending[q]); | |
1253 | else | |
1254 | skb_queue_splice_tail_init(skbs, | |
1255 | &local->pending[q]); | |
1256 | ||
1257 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1258 | flags); | |
1259 | return false; | |
6c17b77b | 1260 | } |
7bb45683 | 1261 | } |
3b8d81e0 | 1262 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1263 | |
11127e91 | 1264 | info->control.vif = vif; |
36323f81 | 1265 | control.sta = sta; |
f0e72851 | 1266 | |
11127e91 | 1267 | __skb_unlink(skb, skbs); |
36323f81 | 1268 | drv_tx(local, &control, skb); |
11127e91 | 1269 | } |
5061b0c2 | 1270 | |
11127e91 JB |
1271 | return true; |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1276 | */ | |
1277 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1278 | struct sk_buff_head *skbs, int led_len, | |
1279 | struct sta_info *sta, bool txpending) | |
1280 | { | |
1281 | struct ieee80211_tx_info *info; | |
1282 | struct ieee80211_sub_if_data *sdata; | |
1283 | struct ieee80211_vif *vif; | |
1284 | struct ieee80211_sta *pubsta; | |
1285 | struct sk_buff *skb; | |
1286 | bool result = true; | |
1287 | __le16 fc; | |
5061b0c2 | 1288 | |
11127e91 JB |
1289 | if (WARN_ON(skb_queue_empty(skbs))) |
1290 | return true; | |
ec25acc4 | 1291 | |
11127e91 JB |
1292 | skb = skb_peek(skbs); |
1293 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1294 | info = IEEE80211_SKB_CB(skb); | |
1295 | sdata = vif_to_sdata(info->control.vif); | |
1296 | if (sta && !sta->uploaded) | |
1297 | sta = NULL; | |
1298 | ||
1299 | if (sta) | |
1300 | pubsta = &sta->sta; | |
1301 | else | |
1302 | pubsta = NULL; | |
1303 | ||
1304 | switch (sdata->vif.type) { | |
1305 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1306 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1307 | vif = &sdata->vif; | |
1308 | break; | |
1309 | } | |
4b6f1dd6 | 1310 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1311 | if (sdata) { |
4b6f1dd6 | 1312 | vif = &sdata->vif; |
3a25a8c8 JB |
1313 | info->hw_queue = |
1314 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1315 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1316 | dev_kfree_skb(skb); | |
1317 | return true; | |
1318 | } else | |
4b6f1dd6 | 1319 | vif = NULL; |
11127e91 JB |
1320 | break; |
1321 | case NL80211_IFTYPE_AP_VLAN: | |
1322 | sdata = container_of(sdata->bss, | |
1323 | struct ieee80211_sub_if_data, u.ap); | |
1324 | /* fall through */ | |
1325 | default: | |
1326 | vif = &sdata->vif; | |
1327 | break; | |
e2ebc74d | 1328 | } |
2de8e0d9 | 1329 | |
cb831b53 JB |
1330 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1331 | txpending); | |
11127e91 | 1332 | |
74e4dbfd | 1333 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1334 | |
4db4e0a1 | 1335 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1336 | |
11127e91 | 1337 | return result; |
e2ebc74d JB |
1338 | } |
1339 | ||
97b045d6 JB |
1340 | /* |
1341 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1342 | * frame was dropped or queued. | |
1343 | */ | |
1344 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1345 | { | |
252b86c4 | 1346 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1347 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1348 | |
9aa4aee3 JB |
1349 | #define CALL_TXH(txh) \ |
1350 | do { \ | |
1351 | res = txh(tx); \ | |
1352 | if (res != TX_CONTINUE) \ | |
1353 | goto txh_done; \ | |
1354 | } while (0) | |
1355 | ||
5c1b98a5 | 1356 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1357 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1358 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1359 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1360 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1361 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1362 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1363 | |
aa5b5492 JB |
1364 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1365 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1366 | tx->skb = NULL; | |
c6fcf6bc | 1367 | goto txh_done; |
aa5b5492 | 1368 | } |
c6fcf6bc JB |
1369 | |
1370 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1371 | CALL_TXH(ieee80211_tx_h_sequence); |
1372 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1373 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1374 | CALL_TXH(ieee80211_tx_h_stats); |
1375 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1376 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1377 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1378 | #undef CALL_TXH |
97b045d6 | 1379 | |
d9e8a70f | 1380 | txh_done: |
97b045d6 | 1381 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1382 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1383 | if (tx->skb) |
c3e7724b | 1384 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1385 | else |
1f98ab7f | 1386 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1387 | return -1; |
1388 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1389 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1390 | return -1; |
1391 | } | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
06be6b14 FF |
1396 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1397 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1398 | int band, struct ieee80211_sta **sta) | |
1399 | { | |
1400 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1401 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1402 | struct ieee80211_tx_data tx; | |
1403 | ||
1404 | if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP) | |
1405 | return false; | |
1406 | ||
1407 | info->band = band; | |
1408 | info->control.vif = vif; | |
1409 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1410 | ||
1411 | if (invoke_tx_handlers(&tx)) | |
1412 | return false; | |
1413 | ||
1414 | if (sta) { | |
1415 | if (tx.sta) | |
1416 | *sta = &tx.sta->sta; | |
1417 | else | |
1418 | *sta = NULL; | |
1419 | } | |
1420 | ||
1421 | return true; | |
1422 | } | |
1423 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1424 | ||
7bb45683 JB |
1425 | /* |
1426 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1427 | */ | |
1428 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
55de908a JB |
1429 | struct sk_buff *skb, bool txpending, |
1430 | enum ieee80211_band band) | |
e2ebc74d | 1431 | { |
3b8d81e0 | 1432 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1433 | struct ieee80211_tx_data tx; |
97b045d6 | 1434 | ieee80211_tx_result res_prepare; |
e039fa4a | 1435 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1436 | bool result = true; |
74e4dbfd | 1437 | int led_len; |
e2ebc74d | 1438 | |
e2ebc74d JB |
1439 | if (unlikely(skb->len < 10)) { |
1440 | dev_kfree_skb(skb); | |
7bb45683 | 1441 | return true; |
e2ebc74d JB |
1442 | } |
1443 | ||
58d4185e | 1444 | /* initialises tx */ |
74e4dbfd | 1445 | led_len = skb->len; |
3b8d81e0 | 1446 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1447 | |
cd8ffc80 | 1448 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1449 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1450 | return true; |
cd8ffc80 | 1451 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1452 | return true; |
e2ebc74d JB |
1453 | } |
1454 | ||
55de908a | 1455 | info->band = band; |
e2ebc74d | 1456 | |
3a25a8c8 JB |
1457 | /* set up hw_queue value early */ |
1458 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1459 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1460 | info->hw_queue = | |
1461 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1462 | ||
7bb45683 | 1463 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1464 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1465 | tx.sta, txpending); | |
55de908a | 1466 | |
7bb45683 | 1467 | return result; |
e2ebc74d JB |
1468 | } |
1469 | ||
1470 | /* device xmit handlers */ | |
1471 | ||
3bff1865 | 1472 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1473 | struct sk_buff *skb, |
1474 | int head_need, bool may_encrypt) | |
1475 | { | |
3bff1865 | 1476 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1477 | int tail_need = 0; |
1478 | ||
3bff1865 | 1479 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1480 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1481 | tail_need -= skb_tailroom(skb); | |
1482 | tail_need = max_t(int, tail_need, 0); | |
1483 | } | |
1484 | ||
c70f59a2 IY |
1485 | if (skb_cloned(skb) && |
1486 | (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CLONED_SKBS) || | |
1487 | !skb_clone_writable(skb, ETH_HLEN) || | |
1488 | sdata->crypto_tx_tailroom_needed_cnt)) | |
23c0752a | 1489 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1490 | else if (head_need || tail_need) |
23c0752a | 1491 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1492 | else |
1493 | return 0; | |
23c0752a JB |
1494 | |
1495 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1496 | wiphy_debug(local->hw.wiphy, |
1497 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1498 | return -ENOMEM; |
1499 | } | |
1500 | ||
23c0752a JB |
1501 | return 0; |
1502 | } | |
1503 | ||
55de908a JB |
1504 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
1505 | enum ieee80211_band band) | |
e2ebc74d | 1506 | { |
3b8d81e0 | 1507 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1508 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1509 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1510 | int headroom; |
23c0752a | 1511 | bool may_encrypt; |
e2ebc74d | 1512 | |
3b8d81e0 | 1513 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1514 | |
3b8d81e0 | 1515 | headroom = local->tx_headroom; |
23c0752a | 1516 | if (may_encrypt) |
2475b1cc | 1517 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1518 | headroom -= skb_headroom(skb); |
1519 | headroom = max_t(int, 0, headroom); | |
1520 | ||
3bff1865 | 1521 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1522 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1523 | return; |
e2ebc74d JB |
1524 | } |
1525 | ||
740c1aa3 | 1526 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1527 | info->control.vif = &sdata->vif; |
e2ebc74d | 1528 | |
3f52b7e3 MP |
1529 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1530 | if (ieee80211_is_data(hdr->frame_control) && | |
1531 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1532 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1533 | return; /* skb queued: don't free */ |
1534 | } else { | |
1535 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1536 | } | |
98aed9fd | 1537 | } |
cca89496 | 1538 | |
2154c81c | 1539 | ieee80211_set_qos_hdr(sdata, skb); |
55de908a | 1540 | ieee80211_tx(sdata, skb, false, band); |
e2ebc74d JB |
1541 | } |
1542 | ||
73b9f03a JB |
1543 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1544 | { | |
1545 | struct ieee80211_radiotap_iterator iterator; | |
1546 | struct ieee80211_radiotap_header *rthdr = | |
1547 | (struct ieee80211_radiotap_header *) skb->data; | |
1548 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1549 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1550 | NULL); | |
1551 | u16 txflags; | |
1552 | ||
1553 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1554 | IEEE80211_TX_CTL_DONTFRAG; | |
1555 | ||
1556 | /* | |
1557 | * for every radiotap entry that is present | |
1558 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1559 | * entries present, or -EINVAL on error) | |
1560 | */ | |
1561 | ||
1562 | while (!ret) { | |
1563 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1564 | ||
1565 | if (ret) | |
1566 | continue; | |
1567 | ||
1568 | /* see if this argument is something we can use */ | |
1569 | switch (iterator.this_arg_index) { | |
1570 | /* | |
1571 | * You must take care when dereferencing iterator.this_arg | |
1572 | * for multibyte types... the pointer is not aligned. Use | |
1573 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1574 | * iterator.this_arg for type "type" safely on all arches. | |
1575 | */ | |
1576 | case IEEE80211_RADIOTAP_FLAGS: | |
1577 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1578 | /* | |
1579 | * this indicates that the skb we have been | |
1580 | * handed has the 32-bit FCS CRC at the end... | |
1581 | * we should react to that by snipping it off | |
1582 | * because it will be recomputed and added | |
1583 | * on transmission | |
1584 | */ | |
1585 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1586 | return false; | |
1587 | ||
1588 | skb_trim(skb, skb->len - FCS_LEN); | |
1589 | } | |
1590 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1591 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1592 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1593 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1594 | break; | |
1595 | ||
1596 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1597 | txflags = get_unaligned_le16(iterator.this_arg); | |
1598 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1599 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1600 | break; | |
1601 | ||
1602 | /* | |
1603 | * Please update the file | |
1604 | * Documentation/networking/mac80211-injection.txt | |
1605 | * when parsing new fields here. | |
1606 | */ | |
1607 | ||
1608 | default: | |
1609 | break; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1614 | return false; | |
1615 | ||
1616 | /* | |
1617 | * remove the radiotap header | |
1618 | * iterator->_max_length was sanity-checked against | |
1619 | * skb->len by iterator init | |
1620 | */ | |
1621 | skb_pull(skb, iterator._max_length); | |
1622 | ||
1623 | return true; | |
1624 | } | |
1625 | ||
d0cf9c0d SH |
1626 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1627 | struct net_device *dev) | |
e2ebc74d JB |
1628 | { |
1629 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 1630 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
1631 | struct ieee80211_radiotap_header *prthdr = |
1632 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1633 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1634 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1635 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 1636 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 1637 | u16 len_rthdr; |
5d9cf4a5 | 1638 | int hdrlen; |
e2ebc74d | 1639 | |
9b8a74e3 AG |
1640 | /* check for not even having the fixed radiotap header part */ |
1641 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1642 | goto fail; /* too short to be possibly valid */ | |
1643 | ||
1644 | /* is it a header version we can trust to find length from? */ | |
1645 | if (unlikely(prthdr->it_version)) | |
1646 | goto fail; /* only version 0 is supported */ | |
1647 | ||
1648 | /* then there must be a radiotap header with a length we can use */ | |
1649 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1650 | ||
1651 | /* does the skb contain enough to deliver on the alleged length? */ | |
1652 | if (unlikely(skb->len < len_rthdr)) | |
1653 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1654 | |
e2ebc74d JB |
1655 | /* |
1656 | * fix up the pointers accounting for the radiotap | |
1657 | * header still being in there. We are being given | |
1658 | * a precooked IEEE80211 header so no need for | |
1659 | * normal processing | |
1660 | */ | |
9b8a74e3 | 1661 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1662 | /* |
9b8a74e3 AG |
1663 | * these are just fixed to the end of the rt area since we |
1664 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1665 | */ |
9b8a74e3 AG |
1666 | skb_set_network_header(skb, len_rthdr); |
1667 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1668 | |
5d9cf4a5 JB |
1669 | if (skb->len < len_rthdr + 2) |
1670 | goto fail; | |
1671 | ||
1672 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1673 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1674 | ||
1675 | if (skb->len < len_rthdr + hdrlen) | |
1676 | goto fail; | |
1677 | ||
f75f5c6f HS |
1678 | /* |
1679 | * Initialize skb->protocol if the injected frame is a data frame | |
1680 | * carrying a rfc1042 header | |
1681 | */ | |
5d9cf4a5 JB |
1682 | if (ieee80211_is_data(hdr->frame_control) && |
1683 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1684 | u8 *payload = (u8 *)hdr + hdrlen; | |
1685 | ||
b203ca39 | 1686 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1687 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1688 | payload[7]); | |
f75f5c6f HS |
1689 | } |
1690 | ||
3b8d81e0 JB |
1691 | memset(info, 0, sizeof(*info)); |
1692 | ||
5d9cf4a5 | 1693 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1694 | IEEE80211_TX_CTL_INJECTED; |
1695 | ||
1696 | /* process and remove the injection radiotap header */ | |
1697 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1698 | goto fail; | |
5d9cf4a5 JB |
1699 | |
1700 | rcu_read_lock(); | |
1701 | ||
1702 | /* | |
1703 | * We process outgoing injected frames that have a local address | |
1704 | * we handle as though they are non-injected frames. | |
1705 | * This code here isn't entirely correct, the local MAC address | |
1706 | * isn't always enough to find the interface to use; for proper | |
1707 | * VLAN/WDS support we will need a different mechanism (which | |
1708 | * likely isn't going to be monitor interfaces). | |
1709 | */ | |
1710 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1711 | ||
1712 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1713 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1714 | continue; | |
1715 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1716 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1717 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1718 | continue; | |
b203ca39 | 1719 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1720 | sdata = tmp_sdata; |
1721 | break; | |
1722 | } | |
1723 | } | |
7351c6bd | 1724 | |
55de908a JB |
1725 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1726 | if (!chanctx_conf) { | |
1727 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1728 | if (tmp_sdata) | |
1729 | chanctx_conf = | |
1730 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1731 | } | |
55de908a | 1732 | |
b4a7ff75 | 1733 | if (chanctx_conf) |
b4932836 | 1734 | chandef = &chanctx_conf->def; |
b4a7ff75 | 1735 | else if (!local->use_chanctx) |
b4932836 | 1736 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
1737 | else |
1738 | goto fail_rcu; | |
55de908a JB |
1739 | |
1740 | /* | |
1741 | * Frame injection is not allowed if beaconing is not allowed | |
1742 | * or if we need radar detection. Beaconing is usually not allowed when | |
1743 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1744 | * Passive scan is also used in world regulatory domains where | |
1745 | * your country is not known and as such it should be treated as | |
1746 | * NO TX unless the channel is explicitly allowed in which case | |
1747 | * your current regulatory domain would not have the passive scan | |
1748 | * flag. | |
1749 | * | |
1750 | * Since AP mode uses monitor interfaces to inject/TX management | |
1751 | * frames we can make AP mode the exception to this rule once it | |
1752 | * supports radar detection as its implementation can deal with | |
1753 | * radar detection by itself. We can do that later by adding a | |
1754 | * monitor flag interfaces used for AP support. | |
1755 | */ | |
b4932836 JD |
1756 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
1757 | sdata->vif.type)) | |
55de908a JB |
1758 | goto fail_rcu; |
1759 | ||
b4932836 | 1760 | ieee80211_xmit(sdata, skb, chandef->chan->band); |
5d9cf4a5 JB |
1761 | rcu_read_unlock(); |
1762 | ||
e2ebc74d | 1763 | return NETDEV_TX_OK; |
9b8a74e3 | 1764 | |
55de908a JB |
1765 | fail_rcu: |
1766 | rcu_read_unlock(); | |
9b8a74e3 AG |
1767 | fail: |
1768 | dev_kfree_skb(skb); | |
1769 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1770 | } |
1771 | ||
ad38bfc9 MG |
1772 | /* |
1773 | * Measure Tx frame arrival time for Tx latency statistics calculation | |
1774 | * A single Tx frame latency should be measured from when it is entering the | |
1775 | * Kernel until we receive Tx complete confirmation indication and the skb is | |
1776 | * freed. | |
1777 | */ | |
1778 | static void ieee80211_tx_latency_start_msrmnt(struct ieee80211_local *local, | |
1779 | struct sk_buff *skb) | |
1780 | { | |
ad38bfc9 MG |
1781 | struct ieee80211_tx_latency_bin_ranges *tx_latency; |
1782 | ||
1783 | tx_latency = rcu_dereference(local->tx_latency); | |
1784 | if (!tx_latency) | |
1785 | return; | |
8d7b70fb | 1786 | skb->tstamp = ktime_get(); |
ad38bfc9 MG |
1787 | } |
1788 | ||
e2ebc74d JB |
1789 | /** |
1790 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1791 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1792 | * @skb: packet to be sent | |
1793 | * @dev: incoming interface | |
1794 | * | |
6188c271 LK |
1795 | * Returns: NETDEV_TX_OK both on success and on failure. On failure skb will |
1796 | * be freed. | |
e2ebc74d JB |
1797 | * |
1798 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1799 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1800 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1801 | * transmission (through low-level driver). | |
1802 | */ | |
d0cf9c0d SH |
1803 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1804 | struct net_device *dev) | |
e2ebc74d | 1805 | { |
133b8226 JB |
1806 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1807 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1808 | struct ieee80211_tx_info *info; |
dcf33963 | 1809 | int head_need; |
065e9605 HH |
1810 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1811 | __le16 fc; | |
e2ebc74d | 1812 | struct ieee80211_hdr hdr; |
ff67bb86 | 1813 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1814 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1815 | const u8 *encaps_data; |
1816 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1817 | int nh_pos, h_pos; |
f14543ee | 1818 | struct sta_info *sta = NULL; |
c2c98fde | 1819 | bool wme_sta = false, authorized = false, tdls_auth = false; |
9deba04d | 1820 | bool tdls_peer = false, tdls_setup_frame = false; |
a729cff8 JB |
1821 | bool multicast; |
1822 | u32 info_flags = 0; | |
1823 | u16 info_id = 0; | |
55de908a JB |
1824 | struct ieee80211_chanctx_conf *chanctx_conf; |
1825 | struct ieee80211_sub_if_data *ap_sdata; | |
1826 | enum ieee80211_band band; | |
e2ebc74d | 1827 | |
dcf33963 | 1828 | if (unlikely(skb->len < ETH_HLEN)) |
e2ebc74d | 1829 | goto fail; |
e2ebc74d | 1830 | |
e2ebc74d JB |
1831 | /* convert Ethernet header to proper 802.11 header (based on |
1832 | * operation mode) */ | |
1833 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1834 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1835 | |
55de908a JB |
1836 | rcu_read_lock(); |
1837 | ||
ad38bfc9 MG |
1838 | /* Measure frame arrival for Tx latency statistics calculation */ |
1839 | ieee80211_tx_latency_start_msrmnt(local, skb); | |
1840 | ||
51fb61e7 | 1841 | switch (sdata->vif.type) { |
05c914fe | 1842 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1843 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1844 | if (sta) { |
1845 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1846 | /* RA TA DA SA */ | |
1847 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1848 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1849 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1850 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1851 | hdrlen = 30; | |
c2c98fde | 1852 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 1853 | wme_sta = sta->sta.wme; |
f14543ee | 1854 | } |
55de908a JB |
1855 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1856 | u.ap); | |
1857 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
1858 | if (!chanctx_conf) | |
1859 | goto fail_rcu; | |
4bf88530 | 1860 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1861 | if (sta) |
1862 | break; | |
1863 | /* fall through */ | |
1864 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1865 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1866 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1867 | if (!chanctx_conf) | |
1868 | goto fail_rcu; | |
065e9605 | 1869 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1870 | /* DA BSSID SA */ |
1871 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1872 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1873 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1874 | hdrlen = 24; | |
4bf88530 | 1875 | band = chanctx_conf->def.chan->band; |
cf966838 | 1876 | break; |
05c914fe | 1877 | case NL80211_IFTYPE_WDS: |
065e9605 | 1878 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1879 | /* RA TA DA SA */ |
1880 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1881 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1882 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1883 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1884 | hdrlen = 30; | |
55de908a JB |
1885 | /* |
1886 | * This is the exception! WDS style interfaces are prohibited | |
1887 | * when channel contexts are in used so this must be valid | |
1888 | */ | |
675a0b04 | 1889 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 1890 | break; |
33b64eb2 | 1891 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1892 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 1893 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1894 | struct sta_info *next_hop; |
1895 | bool mpp_lookup = true; | |
1896 | ||
bf7cd94d | 1897 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1898 | if (mpath) { |
1899 | mpp_lookup = false; | |
1900 | next_hop = rcu_dereference(mpath->next_hop); | |
1901 | if (!next_hop || | |
1902 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1903 | MESH_PATH_RESOLVING))) | |
1904 | mpp_lookup = true; | |
1905 | } | |
1906 | ||
1907 | if (mpp_lookup) | |
bf7cd94d | 1908 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1909 | |
1910 | if (mppath && mpath) | |
1911 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1912 | } |
79617dee | 1913 | |
f76b57b4 | 1914 | /* |
9d52501b JF |
1915 | * Use address extension if it is a packet from |
1916 | * another interface or if we know the destination | |
1917 | * is being proxied by a portal (i.e. portal address | |
1918 | * differs from proxied address) | |
f76b57b4 | 1919 | */ |
b203ca39 JP |
1920 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1921 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1922 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1923 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1924 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1925 | NULL, NULL); | |
79617dee | 1926 | } else { |
27f01124 TP |
1927 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1928 | * For unicast with unknown forwarding information, | |
1929 | * destination might be in the MBSS or if that fails | |
1930 | * forwarded to another mesh gate. In either case | |
1931 | * resolution will be handled in ieee80211_xmit(), so | |
1932 | * leave the original DA. This also works for mcast */ | |
1933 | const u8 *mesh_da = skb->data; | |
1934 | ||
1935 | if (mppath) | |
1936 | mesh_da = mppath->mpp; | |
1937 | else if (mpath) | |
1938 | mesh_da = mpath->dst; | |
79617dee | 1939 | |
3c5772a5 | 1940 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1941 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1942 | if (is_multicast_ether_addr(mesh_da)) |
1943 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1944 | meshhdrlen = ieee80211_new_mesh_header( |
1945 | sdata, &mesh_hdr, | |
1946 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1947 | else |
27f01124 | 1948 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1949 | meshhdrlen = ieee80211_new_mesh_header( |
1950 | sdata, &mesh_hdr, skb->data, | |
1951 | skb->data + ETH_ALEN); | |
79617dee | 1952 | |
79617dee | 1953 | } |
55de908a JB |
1954 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1955 | if (!chanctx_conf) | |
1956 | goto fail_rcu; | |
4bf88530 | 1957 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1958 | break; |
1959 | #endif | |
05c914fe | 1960 | case NL80211_IFTYPE_STATION: |
941c93cd | 1961 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
941c93cd | 1962 | sta = sta_info_get(sdata, skb->data); |
c2c98fde JB |
1963 | if (sta) { |
1964 | authorized = test_sta_flag(sta, | |
1965 | WLAN_STA_AUTHORIZED); | |
a74a8c84 | 1966 | wme_sta = sta->sta.wme; |
c2c98fde | 1967 | tdls_peer = test_sta_flag(sta, |
9deba04d | 1968 | WLAN_STA_TDLS_PEER); |
c2c98fde JB |
1969 | tdls_auth = test_sta_flag(sta, |
1970 | WLAN_STA_TDLS_PEER_AUTH); | |
1971 | } | |
941c93cd | 1972 | |
9deba04d AN |
1973 | if (tdls_peer) |
1974 | tdls_setup_frame = | |
1975 | ethertype == ETH_P_TDLS && | |
1976 | skb->len > 14 && | |
1977 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
941c93cd AN |
1978 | } |
1979 | ||
9deba04d AN |
1980 | /* |
1981 | * TDLS link during setup - throw out frames to peer. We allow | |
1982 | * TDLS-setup frames to unauthorized peers for the special case | |
1983 | * of a link teardown after a TDLS sta is removed due to being | |
1984 | * unreachable. | |
1985 | */ | |
1986 | if (tdls_peer && !tdls_auth && !tdls_setup_frame) | |
1987 | goto fail_rcu; | |
941c93cd | 1988 | |
9deba04d AN |
1989 | /* send direct packets to authorized TDLS peers */ |
1990 | if (tdls_peer && tdls_auth) { | |
941c93cd AN |
1991 | /* DA SA BSSID */ |
1992 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1993 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1994 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1995 | hdrlen = 24; | |
1996 | } else if (sdata->u.mgd.use_4addr && | |
1997 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1998 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1999 | IEEE80211_FCTL_TODS); | |
f14543ee | 2000 | /* RA TA DA SA */ |
941c93cd | 2001 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2002 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2003 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2004 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2005 | hdrlen = 30; | |
2006 | } else { | |
2007 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2008 | /* BSSID SA DA */ | |
941c93cd | 2009 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2010 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2011 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2012 | hdrlen = 24; | |
2013 | } | |
55de908a JB |
2014 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2015 | if (!chanctx_conf) | |
2016 | goto fail_rcu; | |
4bf88530 | 2017 | band = chanctx_conf->def.chan->band; |
cf966838 | 2018 | break; |
239281f8 RL |
2019 | case NL80211_IFTYPE_OCB: |
2020 | /* DA SA BSSID */ | |
2021 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2022 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2023 | eth_broadcast_addr(hdr.addr3); | |
2024 | hdrlen = 24; | |
2025 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2026 | if (!chanctx_conf) | |
2027 | goto fail_rcu; | |
2028 | band = chanctx_conf->def.chan->band; | |
2029 | break; | |
05c914fe | 2030 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2031 | /* DA SA BSSID */ |
2032 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2033 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2034 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2035 | hdrlen = 24; |
55de908a JB |
2036 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2037 | if (!chanctx_conf) | |
2038 | goto fail_rcu; | |
4bf88530 | 2039 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2040 | break; |
2041 | default: | |
55de908a | 2042 | goto fail_rcu; |
e2ebc74d JB |
2043 | } |
2044 | ||
7d185b8b JB |
2045 | /* |
2046 | * There's no need to try to look up the destination | |
2047 | * if it is a multicast address (which can only happen | |
2048 | * in AP mode) | |
2049 | */ | |
a729cff8 JB |
2050 | multicast = is_multicast_ether_addr(hdr.addr1); |
2051 | if (!multicast) { | |
abe60632 | 2052 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
2053 | if (sta) { |
2054 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
a74a8c84 | 2055 | wme_sta = sta->sta.wme; |
c2c98fde | 2056 | } |
e2ebc74d JB |
2057 | } |
2058 | ||
4777be41 JC |
2059 | /* For mesh, the use of the QoS header is mandatory */ |
2060 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 2061 | wme_sta = true; |
4777be41 | 2062 | |
3434fbd3 | 2063 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 2064 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 2065 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2066 | hdrlen += 2; |
2067 | } | |
2068 | ||
2069 | /* | |
238814fd JB |
2070 | * Drop unicast frames to unauthorised stations unless they are |
2071 | * EAPOL frames from the local station. | |
ce3edf6d | 2072 | */ |
55182e4a | 2073 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2074 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2075 | !multicast && !authorized && |
55182e4a | 2076 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2077 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2078 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2079 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 2080 | dev->name, hdr.addr1); |
ce3edf6d JB |
2081 | #endif |
2082 | ||
2083 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2084 | ||
55de908a | 2085 | goto fail_rcu; |
ce3edf6d JB |
2086 | } |
2087 | ||
a729cff8 JB |
2088 | if (unlikely(!multicast && skb->sk && |
2089 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2090 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2091 | |
bf7fa551 | 2092 | if (ack_skb) { |
a729cff8 | 2093 | unsigned long flags; |
9475af6e | 2094 | int id; |
a729cff8 JB |
2095 | |
2096 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2097 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2098 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2099 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2100 | ||
9475af6e | 2101 | if (id >= 0) { |
a729cff8 JB |
2102 | info_id = id; |
2103 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2104 | } else { |
bf7fa551 | 2105 | kfree_skb(ack_skb); |
a729cff8 | 2106 | } |
a729cff8 JB |
2107 | } |
2108 | } | |
2109 | ||
7e244707 HS |
2110 | /* |
2111 | * If the skb is shared we need to obtain our own copy. | |
2112 | */ | |
2113 | if (skb_shared(skb)) { | |
a729cff8 JB |
2114 | struct sk_buff *tmp_skb = skb; |
2115 | ||
2116 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2117 | WARN_ON(info_id); | |
2118 | ||
f8a0a781 | 2119 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2120 | kfree_skb(tmp_skb); |
2121 | ||
dcf33963 | 2122 | if (!skb) |
55de908a | 2123 | goto fail_rcu; |
7e244707 HS |
2124 | } |
2125 | ||
065e9605 | 2126 | hdr.frame_control = fc; |
e2ebc74d JB |
2127 | hdr.duration_id = 0; |
2128 | hdr.seq_ctrl = 0; | |
2129 | ||
2130 | skip_header_bytes = ETH_HLEN; | |
2131 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2132 | encaps_data = bridge_tunnel_header; | |
2133 | encaps_len = sizeof(bridge_tunnel_header); | |
2134 | skip_header_bytes -= 2; | |
e5c5d22e | 2135 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2136 | encaps_data = rfc1042_header; |
2137 | encaps_len = sizeof(rfc1042_header); | |
2138 | skip_header_bytes -= 2; | |
2139 | } else { | |
2140 | encaps_data = NULL; | |
2141 | encaps_len = 0; | |
2142 | } | |
2143 | ||
7e244707 HS |
2144 | nh_pos = skb_network_header(skb) - skb->data; |
2145 | h_pos = skb_transport_header(skb) - skb->data; | |
2146 | ||
e2ebc74d JB |
2147 | skb_pull(skb, skip_header_bytes); |
2148 | nh_pos -= skip_header_bytes; | |
2149 | h_pos -= skip_header_bytes; | |
2150 | ||
23c0752a | 2151 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2152 | |
23c0752a JB |
2153 | /* |
2154 | * So we need to modify the skb header and hence need a copy of | |
2155 | * that. The head_need variable above doesn't, so far, include | |
2156 | * the needed header space that we don't need right away. If we | |
2157 | * can, then we don't reallocate right now but only after the | |
2158 | * frame arrives at the master device (if it does...) | |
2159 | * | |
2160 | * If we cannot, however, then we will reallocate to include all | |
2161 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2162 | * make it big enough for everything we may ever need. | |
2163 | */ | |
e2ebc74d | 2164 | |
3a5be7d4 | 2165 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2166 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2167 | head_need += local->tx_headroom; |
2168 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2169 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2170 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2171 | skb = NULL; |
55de908a | 2172 | goto fail_rcu; |
c3e7724b | 2173 | } |
e2ebc74d JB |
2174 | } |
2175 | ||
2176 | if (encaps_data) { | |
2177 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2178 | nh_pos += encaps_len; | |
2179 | h_pos += encaps_len; | |
2180 | } | |
c29b9b9b | 2181 | |
e4ab7eb0 | 2182 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2183 | if (meshhdrlen > 0) { |
2184 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2185 | nh_pos += meshhdrlen; | |
2186 | h_pos += meshhdrlen; | |
2187 | } | |
e4ab7eb0 | 2188 | #endif |
33b64eb2 | 2189 | |
065e9605 | 2190 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2191 | __le16 *qos_control; |
2192 | ||
f359d3fe | 2193 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2194 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2195 | /* | |
2196 | * Maybe we could actually set some fields here, for now just | |
2197 | * initialise to zero to indicate no special operation. | |
2198 | */ | |
2199 | *qos_control = 0; | |
2200 | } else | |
2201 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2202 | ||
e2ebc74d JB |
2203 | nh_pos += hdrlen; |
2204 | h_pos += hdrlen; | |
2205 | ||
68aae116 SH |
2206 | dev->stats.tx_packets++; |
2207 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2208 | |
2209 | /* Update skb pointers to various headers since this modified frame | |
2210 | * is going to go through Linux networking code that may potentially | |
2211 | * need things like pointer to IP header. */ | |
2212 | skb_set_mac_header(skb, 0); | |
2213 | skb_set_network_header(skb, nh_pos); | |
2214 | skb_set_transport_header(skb, h_pos); | |
2215 | ||
489ee919 | 2216 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2217 | memset(info, 0, sizeof(*info)); |
2218 | ||
e2ebc74d | 2219 | dev->trans_start = jiffies; |
a729cff8 JB |
2220 | |
2221 | info->flags = info_flags; | |
2222 | info->ack_frame_id = info_id; | |
2223 | ||
55de908a JB |
2224 | ieee80211_xmit(sdata, skb, band); |
2225 | rcu_read_unlock(); | |
e2ebc74d | 2226 | |
ec634fe3 | 2227 | return NETDEV_TX_OK; |
e2ebc74d | 2228 | |
55de908a JB |
2229 | fail_rcu: |
2230 | rcu_read_unlock(); | |
e2ebc74d | 2231 | fail: |
dcf33963 JB |
2232 | dev_kfree_skb(skb); |
2233 | return NETDEV_TX_OK; | |
e2ebc74d JB |
2234 | } |
2235 | ||
e2ebc74d | 2236 | |
e2530083 JB |
2237 | /* |
2238 | * ieee80211_clear_tx_pending may not be called in a context where | |
2239 | * it is possible that it packets could come in again. | |
2240 | */ | |
e2ebc74d JB |
2241 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2242 | { | |
1f98ab7f | 2243 | struct sk_buff *skb; |
2de8e0d9 | 2244 | int i; |
e2ebc74d | 2245 | |
1f98ab7f FF |
2246 | for (i = 0; i < local->hw.queues; i++) { |
2247 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2248 | ieee80211_free_txskb(&local->hw, skb); | |
2249 | } | |
e2ebc74d JB |
2250 | } |
2251 | ||
7bb45683 JB |
2252 | /* |
2253 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2254 | * which in this case means re-queued -- take as an indication to stop sending | |
2255 | * more pending frames. | |
2256 | */ | |
cd8ffc80 JB |
2257 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2258 | struct sk_buff *skb) | |
2259 | { | |
2260 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2261 | struct ieee80211_sub_if_data *sdata; | |
2262 | struct sta_info *sta; | |
2263 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2264 | bool result; |
55de908a | 2265 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2266 | |
5061b0c2 | 2267 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2268 | |
2269 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2270 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2271 | if (unlikely(!chanctx_conf)) { | |
2272 | dev_kfree_skb(skb); | |
2273 | return true; | |
2274 | } | |
2275 | result = ieee80211_tx(sdata, skb, true, | |
4bf88530 | 2276 | chanctx_conf->def.chan->band); |
cd8ffc80 | 2277 | } else { |
252b86c4 JB |
2278 | struct sk_buff_head skbs; |
2279 | ||
2280 | __skb_queue_head_init(&skbs); | |
2281 | __skb_queue_tail(&skbs, skb); | |
2282 | ||
cd8ffc80 | 2283 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2284 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2285 | |
74e4dbfd | 2286 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2287 | } |
2288 | ||
cd8ffc80 JB |
2289 | return result; |
2290 | } | |
2291 | ||
e2530083 | 2292 | /* |
3b8d81e0 | 2293 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2294 | */ |
e2ebc74d JB |
2295 | void ieee80211_tx_pending(unsigned long data) |
2296 | { | |
2297 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2298 | unsigned long flags; |
cd8ffc80 | 2299 | int i; |
3b8d81e0 | 2300 | bool txok; |
e2ebc74d | 2301 | |
f0e72851 | 2302 | rcu_read_lock(); |
e2530083 | 2303 | |
3b8d81e0 | 2304 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2305 | for (i = 0; i < local->hw.queues; i++) { |
2306 | /* | |
2307 | * If queue is stopped by something other than due to pending | |
2308 | * frames, or we have no pending frames, proceed to next queue. | |
2309 | */ | |
3b8d81e0 | 2310 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2311 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2312 | continue; |
e2530083 | 2313 | |
2a577d98 | 2314 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2315 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2316 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2317 | |
a7bc376c | 2318 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2319 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2320 | continue; |
2321 | } | |
2322 | ||
3b8d81e0 JB |
2323 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2324 | flags); | |
2325 | ||
2326 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2327 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2328 | flags); | |
2329 | if (!txok) | |
2a577d98 | 2330 | break; |
e2ebc74d | 2331 | } |
7236fe29 JB |
2332 | |
2333 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2334 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2335 | } |
3b8d81e0 | 2336 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2337 | |
f0e72851 | 2338 | rcu_read_unlock(); |
e2ebc74d JB |
2339 | } |
2340 | ||
2341 | /* functions for drivers to get certain frames */ | |
2342 | ||
eac70c13 | 2343 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2344 | struct ps_data *ps, struct sk_buff *skb, |
2345 | bool is_template) | |
e2ebc74d JB |
2346 | { |
2347 | u8 *pos, *tim; | |
2348 | int aid0 = 0; | |
2349 | int i, have_bits = 0, n1, n2; | |
2350 | ||
2351 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2352 | * mode. */ | |
d012a605 | 2353 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2354 | /* in the hope that this is faster than |
2355 | * checking byte-for-byte */ | |
f359d3fe | 2356 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 2357 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
2358 | if (!is_template) { |
2359 | if (ps->dtim_count == 0) | |
2360 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
2361 | else | |
2362 | ps->dtim_count--; | |
2363 | } | |
e2ebc74d JB |
2364 | |
2365 | tim = pos = (u8 *) skb_put(skb, 6); | |
2366 | *pos++ = WLAN_EID_TIM; | |
2367 | *pos++ = 4; | |
d012a605 | 2368 | *pos++ = ps->dtim_count; |
8860020e | 2369 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2370 | |
d012a605 | 2371 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2372 | aid0 = 1; |
2373 | ||
d012a605 | 2374 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2375 | |
e2ebc74d JB |
2376 | if (have_bits) { |
2377 | /* Find largest even number N1 so that bits numbered 1 through | |
2378 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2379 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2380 | n1 = 0; | |
2381 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2382 | if (ps->tim[i]) { |
e2ebc74d JB |
2383 | n1 = i & 0xfe; |
2384 | break; | |
2385 | } | |
2386 | } | |
2387 | n2 = n1; | |
2388 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2389 | if (ps->tim[i]) { |
e2ebc74d JB |
2390 | n2 = i; |
2391 | break; | |
2392 | } | |
2393 | } | |
2394 | ||
2395 | /* Bitmap control */ | |
2396 | *pos++ = n1 | aid0; | |
2397 | /* Part Virt Bitmap */ | |
5220da39 | 2398 | skb_put(skb, n2 - n1); |
d012a605 | 2399 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2400 | |
2401 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2402 | } else { |
2403 | *pos++ = aid0; /* Bitmap control */ | |
2404 | *pos++ = 0; /* Part Virt Bitmap */ | |
2405 | } | |
e2ebc74d JB |
2406 | } |
2407 | ||
eac70c13 | 2408 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2409 | struct ps_data *ps, struct sk_buff *skb, |
2410 | bool is_template) | |
eac70c13 MP |
2411 | { |
2412 | struct ieee80211_local *local = sdata->local; | |
2413 | ||
2414 | /* | |
2415 | * Not very nice, but we want to allow the driver to call | |
2416 | * ieee80211_beacon_get() as a response to the set_tim() | |
2417 | * callback. That, however, is already invoked under the | |
2418 | * sta_lock to guarantee consistent and race-free update | |
2419 | * of the tim bitmap in mac80211 and the driver. | |
2420 | */ | |
2421 | if (local->tim_in_locked_section) { | |
6ec8c332 | 2422 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 2423 | } else { |
1b91731d | 2424 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 2425 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 2426 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2427 | } |
2428 | ||
2429 | return 0; | |
2430 | } | |
2431 | ||
1af586c9 AO |
2432 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
2433 | struct beacon_data *beacon) | |
73da7d5b SW |
2434 | { |
2435 | struct probe_resp *resp; | |
cd7760e6 SW |
2436 | u8 *beacon_data; |
2437 | size_t beacon_data_len; | |
0d06d9ba | 2438 | int i; |
af296bdb | 2439 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
2440 | |
2441 | switch (sdata->vif.type) { | |
2442 | case NL80211_IFTYPE_AP: | |
2443 | beacon_data = beacon->tail; | |
2444 | beacon_data_len = beacon->tail_len; | |
2445 | break; | |
2446 | case NL80211_IFTYPE_ADHOC: | |
2447 | beacon_data = beacon->head; | |
2448 | beacon_data_len = beacon->head_len; | |
2449 | break; | |
b8456a14 CYY |
2450 | case NL80211_IFTYPE_MESH_POINT: |
2451 | beacon_data = beacon->head; | |
2452 | beacon_data_len = beacon->head_len; | |
2453 | break; | |
cd7760e6 SW |
2454 | default: |
2455 | return; | |
2456 | } | |
73da7d5b | 2457 | |
af296bdb | 2458 | rcu_read_lock(); |
0d06d9ba | 2459 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 2460 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 2461 | |
af296bdb MK |
2462 | if (beacon->csa_counter_offsets[i]) { |
2463 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
2464 | beacon_data_len)) { | |
0d06d9ba AO |
2465 | rcu_read_unlock(); |
2466 | return; | |
2467 | } | |
af296bdb MK |
2468 | |
2469 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 2470 | } |
af296bdb MK |
2471 | |
2472 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
2473 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 2474 | } |
af296bdb | 2475 | rcu_read_unlock(); |
1af586c9 AO |
2476 | } |
2477 | ||
2478 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) | |
2479 | { | |
2480 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
2481 | struct beacon_data *beacon = NULL; |
2482 | u8 count = 0; | |
0d06d9ba | 2483 | |
af296bdb MK |
2484 | rcu_read_lock(); |
2485 | ||
2486 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
2487 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
2488 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2489 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
2490 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
2491 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
2492 | ||
2493 | if (!beacon) | |
2494 | goto unlock; | |
2495 | ||
2496 | beacon->csa_current_counter--; | |
1af586c9 AO |
2497 | |
2498 | /* the counter should never reach 0 */ | |
af296bdb MK |
2499 | WARN_ON_ONCE(!beacon->csa_current_counter); |
2500 | count = beacon->csa_current_counter; | |
1af586c9 | 2501 | |
af296bdb MK |
2502 | unlock: |
2503 | rcu_read_unlock(); | |
2504 | return count; | |
73da7d5b | 2505 | } |
1af586c9 | 2506 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
2507 | |
2508 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
2509 | { | |
2510 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2511 | struct beacon_data *beacon = NULL; | |
2512 | u8 *beacon_data; | |
2513 | size_t beacon_data_len; | |
73da7d5b SW |
2514 | int ret = false; |
2515 | ||
2516 | if (!ieee80211_sdata_running(sdata)) | |
2517 | return false; | |
2518 | ||
2519 | rcu_read_lock(); | |
2520 | if (vif->type == NL80211_IFTYPE_AP) { | |
2521 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
2522 | ||
2523 | beacon = rcu_dereference(ap->beacon); | |
2524 | if (WARN_ON(!beacon || !beacon->tail)) | |
2525 | goto out; | |
2526 | beacon_data = beacon->tail; | |
2527 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
2528 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
2529 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
2530 | ||
2531 | beacon = rcu_dereference(ifibss->presp); | |
2532 | if (!beacon) | |
2533 | goto out; | |
2534 | ||
b8456a14 CYY |
2535 | beacon_data = beacon->head; |
2536 | beacon_data_len = beacon->head_len; | |
2537 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
2538 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
2539 | ||
2540 | beacon = rcu_dereference(ifmsh->beacon); | |
2541 | if (!beacon) | |
2542 | goto out; | |
2543 | ||
cd7760e6 SW |
2544 | beacon_data = beacon->head; |
2545 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
2546 | } else { |
2547 | WARN_ON(1); | |
2548 | goto out; | |
2549 | } | |
2550 | ||
10d78f27 MK |
2551 | if (!beacon->csa_counter_offsets[0]) |
2552 | goto out; | |
2553 | ||
af296bdb | 2554 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
2555 | goto out; |
2556 | ||
af296bdb | 2557 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
2558 | ret = true; |
2559 | out: | |
2560 | rcu_read_unlock(); | |
2561 | ||
2562 | return ret; | |
2563 | } | |
2564 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
2565 | ||
6ec8c332 AO |
2566 | static struct sk_buff * |
2567 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
2568 | struct ieee80211_vif *vif, | |
2569 | struct ieee80211_mutable_offsets *offs, | |
2570 | bool is_template) | |
e2ebc74d JB |
2571 | { |
2572 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 2573 | struct beacon_data *beacon = NULL; |
9d139c81 | 2574 | struct sk_buff *skb = NULL; |
e039fa4a | 2575 | struct ieee80211_tx_info *info; |
e2ebc74d | 2576 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2577 | enum ieee80211_band band; |
e00cfce0 | 2578 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2579 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 2580 | int csa_off_base = 0; |
8318d78a | 2581 | |
5dfdaf58 | 2582 | rcu_read_lock(); |
e2ebc74d | 2583 | |
32bfd35d | 2584 | sdata = vif_to_sdata(vif); |
55de908a | 2585 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2586 | |
55de908a | 2587 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2588 | goto out; |
2589 | ||
6ec8c332 AO |
2590 | if (offs) |
2591 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 2592 | |
05c914fe | 2593 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 2594 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 2595 | |
af296bdb | 2596 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 2597 | if (beacon) { |
10d78f27 | 2598 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2599 | if (!is_template) |
2600 | ieee80211_csa_update_counter(vif); | |
2601 | ||
2602 | ieee80211_set_csa(sdata, beacon); | |
2603 | } | |
73da7d5b | 2604 | |
902acc78 JB |
2605 | /* |
2606 | * headroom, head length, | |
2607 | * tail length and maximum TIM length | |
2608 | */ | |
2609 | skb = dev_alloc_skb(local->tx_headroom + | |
2610 | beacon->head_len + | |
70dabeb7 FF |
2611 | beacon->tail_len + 256 + |
2612 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
2613 | if (!skb) |
2614 | goto out; | |
33b64eb2 | 2615 | |
902acc78 JB |
2616 | skb_reserve(skb, local->tx_headroom); |
2617 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2618 | beacon->head_len); | |
33b64eb2 | 2619 | |
6ec8c332 AO |
2620 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
2621 | is_template); | |
33b64eb2 | 2622 | |
6ec8c332 AO |
2623 | if (offs) { |
2624 | offs->tim_offset = beacon->head_len; | |
2625 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
2626 | |
2627 | /* for AP the csa offsets are from tail */ | |
2628 | csa_off_base = skb->len; | |
6ec8c332 | 2629 | } |
eddcbb94 | 2630 | |
902acc78 JB |
2631 | if (beacon->tail) |
2632 | memcpy(skb_put(skb, beacon->tail_len), | |
2633 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2634 | } else |
2635 | goto out; | |
05c914fe | 2636 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2637 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2638 | struct ieee80211_hdr *hdr; |
33b64eb2 | 2639 | |
af296bdb MK |
2640 | beacon = rcu_dereference(ifibss->presp); |
2641 | if (!beacon) | |
9d139c81 JB |
2642 | goto out; |
2643 | ||
10d78f27 | 2644 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2645 | if (!is_template) |
2646 | ieee80211_csa_update_counter(vif); | |
cd7760e6 | 2647 | |
af296bdb | 2648 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2649 | } |
cd7760e6 | 2650 | |
af296bdb | 2651 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 2652 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
2653 | if (!skb) |
2654 | goto out; | |
c3ffeab4 | 2655 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2656 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2657 | beacon->head_len); | |
9d139c81 JB |
2658 | |
2659 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2660 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2661 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2662 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2663 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 2664 | |
af296bdb MK |
2665 | beacon = rcu_dereference(ifmsh->beacon); |
2666 | if (!beacon) | |
ac1bd846 | 2667 | goto out; |
ac1bd846 | 2668 | |
10d78f27 | 2669 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2670 | if (!is_template) |
2671 | /* TODO: For mesh csa_counter is in TU, so | |
2672 | * decrementing it by one isn't correct, but | |
2673 | * for now we leave it consistent with overall | |
2674 | * mac80211's behavior. | |
2675 | */ | |
2676 | ieee80211_csa_update_counter(vif); | |
2677 | ||
af296bdb | 2678 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2679 | } |
b8456a14 | 2680 | |
dbf498fb | 2681 | if (ifmsh->sync_ops) |
af296bdb | 2682 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
dbf498fb | 2683 | |
3b69a9c5 | 2684 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 2685 | beacon->head_len + |
3f52b7e3 | 2686 | 256 + /* TIM IE */ |
af296bdb | 2687 | beacon->tail_len + |
70dabeb7 | 2688 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
2689 | if (!skb) |
2690 | goto out; | |
2b5e1967 | 2691 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2692 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2693 | beacon->head_len); | |
6ec8c332 AO |
2694 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
2695 | ||
2696 | if (offs) { | |
af296bdb MK |
2697 | offs->tim_offset = beacon->head_len; |
2698 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
2699 | } |
2700 | ||
af296bdb MK |
2701 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
2702 | beacon->tail_len); | |
9d139c81 JB |
2703 | } else { |
2704 | WARN_ON(1); | |
5dfdaf58 | 2705 | goto out; |
e2ebc74d JB |
2706 | } |
2707 | ||
1af586c9 | 2708 | /* CSA offsets */ |
af296bdb | 2709 | if (offs && beacon) { |
1af586c9 AO |
2710 | int i; |
2711 | ||
2712 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 2713 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
2714 | |
2715 | if (!csa_off) | |
2716 | continue; | |
2717 | ||
2718 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
2719 | } | |
2720 | } | |
2721 | ||
4bf88530 | 2722 | band = chanctx_conf->def.chan->band; |
55de908a | 2723 | |
e039fa4a JB |
2724 | info = IEEE80211_SKB_CB(skb); |
2725 | ||
3b8d81e0 | 2726 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2727 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2728 | info->band = band; |
e00cfce0 JM |
2729 | |
2730 | memset(&txrc, 0, sizeof(txrc)); | |
2731 | txrc.hw = hw; | |
e31583cd | 2732 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2733 | txrc.bss_conf = &sdata->vif.bss_conf; |
2734 | txrc.skb = skb; | |
2735 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2736 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2737 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2738 | txrc.max_rate_idx = -1; |
2739 | else | |
2740 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2741 | txrc.bss = true; |
e00cfce0 | 2742 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2743 | |
2744 | info->control.vif = vif; | |
f591fa5d | 2745 | |
a472e71b JL |
2746 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2747 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2748 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2749 | out: |
5dfdaf58 | 2750 | rcu_read_unlock(); |
e2ebc74d | 2751 | return skb; |
6ec8c332 AO |
2752 | |
2753 | } | |
2754 | ||
2755 | struct sk_buff * | |
2756 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
2757 | struct ieee80211_vif *vif, | |
2758 | struct ieee80211_mutable_offsets *offs) | |
2759 | { | |
2760 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
2761 | } | |
2762 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
2763 | ||
2764 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
2765 | struct ieee80211_vif *vif, | |
2766 | u16 *tim_offset, u16 *tim_length) | |
2767 | { | |
2768 | struct ieee80211_mutable_offsets offs = {}; | |
2769 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
2770 | ||
2771 | if (tim_offset) | |
2772 | *tim_offset = offs.tim_offset; | |
2773 | ||
2774 | if (tim_length) | |
2775 | *tim_length = offs.tim_length; | |
2776 | ||
2777 | return bcn; | |
e2ebc74d | 2778 | } |
eddcbb94 | 2779 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2780 | |
02945821 AN |
2781 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2782 | struct ieee80211_vif *vif) | |
2783 | { | |
2784 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2785 | struct sk_buff *skb = NULL; |
2786 | struct probe_resp *presp = NULL; | |
02945821 AN |
2787 | struct ieee80211_hdr *hdr; |
2788 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2789 | ||
2790 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2791 | return NULL; | |
2792 | ||
2793 | rcu_read_lock(); | |
2794 | ||
2795 | ap = &sdata->u.ap; | |
2796 | presp = rcu_dereference(ap->probe_resp); | |
2797 | if (!presp) | |
2798 | goto out; | |
2799 | ||
aa7a0080 | 2800 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2801 | if (!skb) |
2802 | goto out; | |
2803 | ||
aa7a0080 ES |
2804 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2805 | ||
02945821 AN |
2806 | hdr = (struct ieee80211_hdr *) skb->data; |
2807 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2808 | ||
2809 | out: | |
2810 | rcu_read_unlock(); | |
2811 | return skb; | |
2812 | } | |
2813 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2814 | ||
7044cc56 KV |
2815 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2816 | struct ieee80211_vif *vif) | |
2817 | { | |
2818 | struct ieee80211_sub_if_data *sdata; | |
2819 | struct ieee80211_if_managed *ifmgd; | |
2820 | struct ieee80211_pspoll *pspoll; | |
2821 | struct ieee80211_local *local; | |
2822 | struct sk_buff *skb; | |
2823 | ||
2824 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2825 | return NULL; | |
2826 | ||
2827 | sdata = vif_to_sdata(vif); | |
2828 | ifmgd = &sdata->u.mgd; | |
2829 | local = sdata->local; | |
2830 | ||
2831 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2832 | if (!skb) |
7044cc56 | 2833 | return NULL; |
d15b8459 | 2834 | |
7044cc56 KV |
2835 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2836 | ||
2837 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2838 | memset(pspoll, 0, sizeof(*pspoll)); | |
2839 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2840 | IEEE80211_STYPE_PSPOLL); | |
2841 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2842 | ||
2843 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2844 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2845 | ||
2846 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2847 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2848 | ||
2849 | return skb; | |
2850 | } | |
2851 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2852 | ||
2853 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2854 | struct ieee80211_vif *vif) | |
2855 | { | |
2856 | struct ieee80211_hdr_3addr *nullfunc; | |
2857 | struct ieee80211_sub_if_data *sdata; | |
2858 | struct ieee80211_if_managed *ifmgd; | |
2859 | struct ieee80211_local *local; | |
2860 | struct sk_buff *skb; | |
2861 | ||
2862 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2863 | return NULL; | |
2864 | ||
2865 | sdata = vif_to_sdata(vif); | |
2866 | ifmgd = &sdata->u.mgd; | |
2867 | local = sdata->local; | |
2868 | ||
2869 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2870 | if (!skb) |
7044cc56 | 2871 | return NULL; |
d15b8459 | 2872 | |
7044cc56 KV |
2873 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2874 | ||
2875 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2876 | sizeof(*nullfunc)); | |
2877 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2878 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2879 | IEEE80211_STYPE_NULLFUNC | | |
2880 | IEEE80211_FCTL_TODS); | |
2881 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2882 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2883 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2884 | ||
2885 | return skb; | |
2886 | } | |
2887 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2888 | ||
05e54ea6 KV |
2889 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2890 | struct ieee80211_vif *vif, | |
2891 | const u8 *ssid, size_t ssid_len, | |
b9a9ada1 | 2892 | size_t tailroom) |
05e54ea6 KV |
2893 | { |
2894 | struct ieee80211_sub_if_data *sdata; | |
2895 | struct ieee80211_local *local; | |
2896 | struct ieee80211_hdr_3addr *hdr; | |
2897 | struct sk_buff *skb; | |
2898 | size_t ie_ssid_len; | |
2899 | u8 *pos; | |
2900 | ||
2901 | sdata = vif_to_sdata(vif); | |
2902 | local = sdata->local; | |
2903 | ie_ssid_len = 2 + ssid_len; | |
2904 | ||
2905 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2906 | ie_ssid_len + tailroom); |
d15b8459 | 2907 | if (!skb) |
05e54ea6 | 2908 | return NULL; |
05e54ea6 KV |
2909 | |
2910 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2911 | ||
2912 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2913 | memset(hdr, 0, sizeof(*hdr)); | |
2914 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2915 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 2916 | eth_broadcast_addr(hdr->addr1); |
05e54ea6 | 2917 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
e83e6541 | 2918 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
2919 | |
2920 | pos = skb_put(skb, ie_ssid_len); | |
2921 | *pos++ = WLAN_EID_SSID; | |
2922 | *pos++ = ssid_len; | |
88c868c4 | 2923 | if (ssid_len) |
05e54ea6 KV |
2924 | memcpy(pos, ssid, ssid_len); |
2925 | pos += ssid_len; | |
2926 | ||
05e54ea6 KV |
2927 | return skb; |
2928 | } | |
2929 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2930 | ||
32bfd35d | 2931 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2932 | const void *frame, size_t frame_len, |
e039fa4a | 2933 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2934 | struct ieee80211_rts *rts) |
2935 | { | |
2936 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2937 | |
065e9605 HH |
2938 | rts->frame_control = |
2939 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2940 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2941 | frame_txctl); | |
e2ebc74d JB |
2942 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2943 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2944 | } | |
2945 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2946 | ||
32bfd35d | 2947 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2948 | const void *frame, size_t frame_len, |
e039fa4a | 2949 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2950 | struct ieee80211_cts *cts) |
2951 | { | |
2952 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2953 | |
065e9605 HH |
2954 | cts->frame_control = |
2955 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2956 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2957 | frame_len, frame_txctl); | |
e2ebc74d JB |
2958 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2959 | } | |
2960 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2961 | ||
2962 | struct sk_buff * | |
32bfd35d | 2963 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2964 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2965 | { |
2966 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2967 | struct sk_buff *skb = NULL; |
5cf121c3 | 2968 | struct ieee80211_tx_data tx; |
e2ebc74d | 2969 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 2970 | struct ps_data *ps; |
e039fa4a | 2971 | struct ieee80211_tx_info *info; |
55de908a | 2972 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 2973 | |
32bfd35d | 2974 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 2975 | |
5dfdaf58 | 2976 | rcu_read_lock(); |
55de908a | 2977 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 2978 | |
d012a605 MP |
2979 | if (!chanctx_conf) |
2980 | goto out; | |
2981 | ||
2982 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
2983 | struct beacon_data *beacon = | |
2984 | rcu_dereference(sdata->u.ap.beacon); | |
2985 | ||
2986 | if (!beacon || !beacon->head) | |
2987 | goto out; | |
2988 | ||
2989 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
2990 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2991 | ps = &sdata->u.mesh.ps; | |
d012a605 | 2992 | } else { |
747cf5e9 | 2993 | goto out; |
d012a605 | 2994 | } |
5dfdaf58 | 2995 | |
d012a605 | 2996 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 2997 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2998 | |
e2ebc74d | 2999 | while (1) { |
d012a605 | 3000 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 3001 | if (!skb) |
747cf5e9 | 3002 | goto out; |
e2ebc74d JB |
3003 | local->total_ps_buffered--; |
3004 | ||
d012a605 | 3005 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
3006 | struct ieee80211_hdr *hdr = |
3007 | (struct ieee80211_hdr *) skb->data; | |
3008 | /* more buffered multicast/broadcast frames ==> set | |
3009 | * MoreData flag in IEEE 802.11 header to inform PS | |
3010 | * STAs */ | |
3011 | hdr->frame_control |= | |
3012 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3013 | } | |
3014 | ||
112c44b2 | 3015 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 3016 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
3b8d81e0 | 3017 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
3018 | break; |
3019 | dev_kfree_skb_any(skb); | |
3020 | } | |
e039fa4a JB |
3021 | |
3022 | info = IEEE80211_SKB_CB(skb); | |
3023 | ||
5cf121c3 | 3024 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 3025 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 3026 | |
97b045d6 | 3027 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 3028 | skb = NULL; |
97b045d6 | 3029 | out: |
d0709a65 | 3030 | rcu_read_unlock(); |
e2ebc74d JB |
3031 | |
3032 | return skb; | |
3033 | } | |
3034 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 3035 | |
55de908a JB |
3036 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
3037 | struct sk_buff *skb, int tid, | |
3038 | enum ieee80211_band band) | |
3b8d81e0 | 3039 | { |
353d09c6 | 3040 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 3041 | |
3b8d81e0 JB |
3042 | skb_set_mac_header(skb, 0); |
3043 | skb_set_network_header(skb, 0); | |
3044 | skb_set_transport_header(skb, 0); | |
3045 | ||
3a25a8c8 | 3046 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 3047 | skb->priority = tid; |
cf0277e7 | 3048 | |
89afe614 JB |
3049 | skb->dev = sdata->dev; |
3050 | ||
3d34deb6 JB |
3051 | /* |
3052 | * The other path calling ieee80211_xmit is from the tasklet, | |
3053 | * and while we can handle concurrent transmissions locking | |
3054 | * requirements are that we do not come into tx with bhs on. | |
3055 | */ | |
3056 | local_bh_disable(); | |
55de908a | 3057 | ieee80211_xmit(sdata, skb, band); |
3d34deb6 | 3058 | local_bh_enable(); |
3b8d81e0 | 3059 | } |