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