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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e2ebc74d JB |
2 | /* |
3 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
4 | * Copyright 2005-2006, Devicescape Software, Inc. | |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
6 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 7 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
ca98c47d | 8 | * Copyright (C) 2018-2020 Intel Corporation |
e2ebc74d | 9 | * |
e2ebc74d JB |
10 | * Transmit and frame generation functions. |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/skbuff.h> | |
ebceec86 | 16 | #include <linux/if_vlan.h> |
e2ebc74d JB |
17 | #include <linux/etherdevice.h> |
18 | #include <linux/bitmap.h> | |
d4e46a3d | 19 | #include <linux/rcupdate.h> |
bc3b2d7f | 20 | #include <linux/export.h> |
881d966b | 21 | #include <net/net_namespace.h> |
e2ebc74d JB |
22 | #include <net/ieee80211_radiotap.h> |
23 | #include <net/cfg80211.h> | |
24 | #include <net/mac80211.h> | |
5caa328e MK |
25 | #include <net/codel.h> |
26 | #include <net/codel_impl.h> | |
e2ebc74d | 27 | #include <asm/unaligned.h> |
fa962b92 | 28 | #include <net/fq_impl.h> |
e2ebc74d JB |
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 | ||
95cd470c FF |
54 | /* assume HW handles this */ |
55 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) | |
56 | return 0; | |
57 | ||
2103dec1 SW |
58 | rcu_read_lock(); |
59 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
60 | if (chanctx_conf) { | |
61 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
62 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
63 | } | |
64 | rcu_read_unlock(); | |
e6a9854b | 65 | |
e6a9854b | 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 | 74 | |
89b8c02a TP |
75 | /* device is expected to do this */ |
76 | if (sband->band == NL80211_BAND_S1GHZ) | |
77 | return 0; | |
78 | ||
e2ebc74d JB |
79 | /* |
80 | * data and mgmt (except PS Poll): | |
81 | * - during CFP: 32768 | |
82 | * - during contention period: | |
83 | * if addr1 is group address: 0 | |
84 | * if more fragments = 0 and addr1 is individual address: time to | |
85 | * transmit one ACK plus SIFS | |
86 | * if more fragments = 1 and addr1 is individual address: time to | |
87 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
88 | * | |
89 | * IEEE 802.11, 9.6: | |
90 | * - control response frame (CTS or ACK) shall be transmitted using the | |
91 | * same rate as the immediately previous frame in the frame exchange | |
92 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
93 | * at the highest possible rate belonging to the PHY rates in the | |
94 | * BSSBasicRateSet | |
95 | */ | |
252b86c4 | 96 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 97 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 98 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 99 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
100 | * needs to be updated to support duration field calculation. |
101 | * | |
102 | * RTS: time needed to transmit pending data/mgmt frame plus | |
103 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
104 | * CTS: duration of immediately previous RTS minus time | |
105 | * required to transmit CTS and its SIFS | |
106 | * ACK: 0 if immediately previous directed data/mgmt had | |
107 | * more=0, with more=1 duration in ACK frame is duration | |
108 | * from previous frame minus time needed to transmit ACK | |
109 | * and its SIFS | |
110 | * PS Poll: BIT(15) | BIT(14) | aid | |
111 | */ | |
112 | return 0; | |
113 | } | |
114 | ||
115 | /* data/mgmt */ | |
116 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 117 | return cpu_to_le16(32768); |
e2ebc74d JB |
118 | |
119 | if (group_addr) /* Group address as the destination - no ACK */ | |
120 | return 0; | |
121 | ||
122 | /* Individual destination address: | |
123 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
124 | * CTS and ACK frames shall be transmitted using the highest rate in | |
125 | * basic rate set that is less than or equal to the rate of the | |
126 | * immediately previous frame and that is using the same modulation | |
127 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
128 | * the highest mandatory rate of the PHY that is less than or equal to | |
129 | * the rate of the previous frame is used. | |
130 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
131 | */ | |
132 | rate = -1; | |
8318d78a JB |
133 | /* use lowest available if everything fails */ |
134 | mrate = sband->bitrates[0].bitrate; | |
135 | for (i = 0; i < sband->n_bitrates; i++) { | |
136 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 137 | |
8318d78a JB |
138 | if (r->bitrate > txrate->bitrate) |
139 | break; | |
e2ebc74d | 140 | |
2103dec1 SW |
141 | if ((rate_flags & r->flags) != rate_flags) |
142 | continue; | |
143 | ||
bda3933a | 144 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 145 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
146 | |
147 | switch (sband->band) { | |
57fbcce3 | 148 | case NL80211_BAND_2GHZ: { |
8318d78a JB |
149 | u32 flag; |
150 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
151 | flag = IEEE80211_RATE_MANDATORY_G; | |
152 | else | |
153 | flag = IEEE80211_RATE_MANDATORY_B; | |
154 | if (r->flags & flag) | |
155 | mrate = r->bitrate; | |
156 | break; | |
157 | } | |
57fbcce3 | 158 | case NL80211_BAND_5GHZ: |
c5b9a7f8 | 159 | case NL80211_BAND_6GHZ: |
8318d78a JB |
160 | if (r->flags & IEEE80211_RATE_MANDATORY_A) |
161 | mrate = r->bitrate; | |
162 | break; | |
df78a0c0 | 163 | case NL80211_BAND_S1GHZ: |
57fbcce3 | 164 | case NL80211_BAND_60GHZ: |
3a0c52a6 | 165 | /* TODO, for now fall through */ |
57fbcce3 | 166 | case NUM_NL80211_BANDS: |
8318d78a JB |
167 | WARN_ON(1); |
168 | break; | |
169 | } | |
e2ebc74d JB |
170 | } |
171 | if (rate == -1) { | |
172 | /* No matching basic rate found; use highest suitable mandatory | |
173 | * PHY rate */ | |
2103dec1 | 174 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
175 | } |
176 | ||
6674f210 SW |
177 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
178 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 179 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
180 | dur = 0; |
181 | else | |
182 | /* Time needed to transmit ACK | |
183 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
184 | * to closest integer */ | |
4ee73f33 | 185 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
186 | tx->sdata->vif.bss_conf.use_short_preamble, |
187 | shift); | |
e2ebc74d JB |
188 | |
189 | if (next_frag_len) { | |
190 | /* Frame is fragmented: duration increases with time needed to | |
191 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
192 | dur *= 2; /* ACK + SIFS */ | |
193 | /* next fragment */ | |
4ee73f33 | 194 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 195 | txrate->bitrate, erp, |
438b61b7 SW |
196 | tx->sdata->vif.bss_conf.use_short_preamble, |
197 | shift); | |
e2ebc74d JB |
198 | } |
199 | ||
03f93c3d | 200 | return cpu_to_le16(dur); |
e2ebc74d JB |
201 | } |
202 | ||
e2ebc74d | 203 | /* tx handlers */ |
5c1b98a5 KV |
204 | static ieee80211_tx_result debug_noinline |
205 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
206 | { | |
207 | struct ieee80211_local *local = tx->local; | |
0c74211d | 208 | struct ieee80211_if_managed *ifmgd; |
94a5b3ac | 209 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
5c1b98a5 KV |
210 | |
211 | /* driver doesn't support power save */ | |
30686bf7 | 212 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) |
5c1b98a5 KV |
213 | return TX_CONTINUE; |
214 | ||
215 | /* hardware does dynamic power save */ | |
30686bf7 | 216 | if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) |
5c1b98a5 KV |
217 | return TX_CONTINUE; |
218 | ||
219 | /* dynamic power save disabled */ | |
220 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
221 | return TX_CONTINUE; | |
222 | ||
223 | /* we are scanning, don't enable power save */ | |
224 | if (local->scanning) | |
225 | return TX_CONTINUE; | |
226 | ||
227 | if (!local->ps_sdata) | |
228 | return TX_CONTINUE; | |
229 | ||
230 | /* No point if we're going to suspend */ | |
231 | if (local->quiescing) | |
232 | return TX_CONTINUE; | |
233 | ||
0c74211d KV |
234 | /* dynamic ps is supported only in managed mode */ |
235 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
236 | return TX_CONTINUE; | |
237 | ||
94a5b3ac AO |
238 | if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) |
239 | return TX_CONTINUE; | |
240 | ||
0c74211d KV |
241 | ifmgd = &tx->sdata->u.mgd; |
242 | ||
243 | /* | |
244 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
245 | * u-apsd enabled and the frame is in voip class. This effectively | |
246 | * means that even if all access categories have u-apsd enabled, in | |
247 | * practise u-apsd is only used with the voip ac. This is a | |
248 | * workaround for the case when received voip class packets do not | |
249 | * have correct qos tag for some reason, due the network or the | |
250 | * peer application. | |
251 | * | |
dc41e4d4 | 252 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
253 | * changed via debugfs, user needs to reassociate manually to have |
254 | * everything in sync. | |
255 | */ | |
4875d30d JB |
256 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
257 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
258 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
259 | return TX_CONTINUE; |
260 | ||
5c1b98a5 KV |
261 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
262 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 263 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
264 | IEEE80211_QUEUE_STOP_REASON_PS, |
265 | false); | |
db28569a | 266 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
267 | ieee80211_queue_work(&local->hw, |
268 | &local->dynamic_ps_disable_work); | |
269 | } | |
270 | ||
5db1c07c LC |
271 | /* Don't restart the timer if we're not disassociated */ |
272 | if (!ifmgd->associated) | |
273 | return TX_CONTINUE; | |
274 | ||
5c1b98a5 KV |
275 | mod_timer(&local->dynamic_ps_timer, jiffies + |
276 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
277 | ||
278 | return TX_CONTINUE; | |
279 | } | |
e2ebc74d | 280 | |
d9e8a70f | 281 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 282 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 283 | { |
358c8d9d | 284 | |
e039fa4a | 285 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 286 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 287 | bool assoc = false; |
e2ebc74d | 288 | |
e039fa4a | 289 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 290 | return TX_CONTINUE; |
58d4185e | 291 | |
b23b025f BG |
292 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
293 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff | 294 | !ieee80211_is_probe_req(hdr->frame_control) && |
30b2f0be | 295 | !ieee80211_is_any_nullfunc(hdr->frame_control)) |
a9a6ffff KV |
296 | /* |
297 | * When software scanning only nullfunc frames (to notify | |
298 | * the sleep state to the AP) and probe requests (for the | |
299 | * active scan) are allowed, all other frames should not be | |
300 | * sent and we should not get here, but if we do | |
301 | * nonetheless, drop them to avoid sending them | |
302 | * off-channel. See the link below and | |
303 | * ieee80211_start_scan() for more. | |
304 | * | |
305 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
306 | */ | |
9ae54c84 | 307 | return TX_DROP; |
e2ebc74d | 308 | |
239281f8 RL |
309 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
310 | return TX_CONTINUE; | |
311 | ||
5cf121c3 | 312 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 313 | return TX_CONTINUE; |
e2ebc74d | 314 | |
c2c98fde JB |
315 | if (tx->sta) |
316 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 317 | |
5cf121c3 | 318 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 319 | if (unlikely(!assoc && |
358c8d9d | 320 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 321 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
322 | sdata_info(tx->sdata, |
323 | "dropped data frame to not associated station %pM\n", | |
324 | hdr->addr1); | |
325 | #endif | |
e2ebc74d | 326 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 327 | return TX_DROP; |
e2ebc74d | 328 | } |
72f15d53 MB |
329 | } else if (unlikely(ieee80211_is_data(hdr->frame_control) && |
330 | ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) { | |
29623892 JB |
331 | /* |
332 | * No associated STAs - no need to send multicast | |
333 | * frames. | |
334 | */ | |
335 | return TX_DROP; | |
e2ebc74d JB |
336 | } |
337 | ||
9ae54c84 | 338 | return TX_CONTINUE; |
e2ebc74d JB |
339 | } |
340 | ||
e2ebc74d JB |
341 | /* This function is called whenever the AP is about to exceed the maximum limit |
342 | * of buffered frames for power saving STAs. This situation should not really | |
343 | * happen often during normal operation, so dropping the oldest buffered packet | |
344 | * from each queue should be OK to make some room for new frames. */ | |
345 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
346 | { | |
347 | int total = 0, purged = 0; | |
348 | struct sk_buff *skb; | |
349 | struct ieee80211_sub_if_data *sdata; | |
350 | struct sta_info *sta; | |
351 | ||
79010420 | 352 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
353 | struct ps_data *ps; |
354 | ||
355 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
356 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
357 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
358 | ps = &sdata->u.mesh.ps; | |
d012a605 | 359 | else |
e2ebc74d | 360 | continue; |
d012a605 MP |
361 | |
362 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
363 | if (skb) { |
364 | purged++; | |
6b07d9ca | 365 | ieee80211_free_txskb(&local->hw, skb); |
e2ebc74d | 366 | } |
d012a605 | 367 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 368 | } |
e2ebc74d | 369 | |
948d887d JB |
370 | /* |
371 | * Drop one frame from each station from the lowest-priority | |
372 | * AC that has frames at all. | |
373 | */ | |
d0709a65 | 374 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
375 | int ac; |
376 | ||
377 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
378 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
379 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
380 | if (skb) { | |
381 | purged++; | |
c3e7724b | 382 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
383 | break; |
384 | } | |
e2ebc74d | 385 | } |
e2ebc74d | 386 | } |
d0709a65 | 387 | |
e2ebc74d | 388 | local->total_ps_buffered = total; |
bdcbd8e0 | 389 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
390 | } |
391 | ||
9ae54c84 | 392 | static ieee80211_tx_result |
5cf121c3 | 393 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 394 | { |
e039fa4a | 395 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 396 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 397 | struct ps_data *ps; |
e039fa4a | 398 | |
7d54d0dd JB |
399 | /* |
400 | * broadcast/multicast frame | |
401 | * | |
3f52b7e3 | 402 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
403 | * the frame is buffered to be sent after DTIM beacon frame. |
404 | * This is done either by the hardware or us. | |
405 | */ | |
406 | ||
3f52b7e3 | 407 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
408 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
409 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
410 | if (!tx->sdata->bss) | |
411 | return TX_CONTINUE; | |
412 | ||
413 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
414 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
415 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 416 | } else { |
3e122be0 | 417 | return TX_CONTINUE; |
d012a605 MP |
418 | } |
419 | ||
3e122be0 JB |
420 | |
421 | /* no buffering for ordered frames */ | |
358c8d9d | 422 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 423 | return TX_CONTINUE; |
7d54d0dd | 424 | |
08b99399 JB |
425 | if (ieee80211_is_probe_req(hdr->frame_control)) |
426 | return TX_CONTINUE; | |
427 | ||
30686bf7 | 428 | if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL)) |
f4d57941 JB |
429 | info->hw_queue = tx->sdata->vif.cab_queue; |
430 | ||
9ec1190d FF |
431 | /* no stations in PS mode and no buffered packets */ |
432 | if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf)) | |
9ae54c84 | 433 | return TX_CONTINUE; |
7d54d0dd | 434 | |
62b517cb | 435 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 436 | |
62b517cb | 437 | /* device releases frame after DTIM beacon */ |
30686bf7 | 438 | if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING)) |
62b1208e | 439 | return TX_CONTINUE; |
62b1208e | 440 | |
7d54d0dd | 441 | /* buffered in mac80211 */ |
62b1208e JB |
442 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
443 | purge_old_ps_buffers(tx->local); | |
444 | ||
d012a605 | 445 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
446 | ps_dbg(tx->sdata, |
447 | "BC TX buffer full - dropping the oldest frame\n"); | |
6b07d9ca | 448 | ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
449 | } else |
450 | tx->local->total_ps_buffered++; | |
e2ebc74d | 451 | |
d012a605 | 452 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 453 | |
62b1208e | 454 | return TX_QUEUED; |
e2ebc74d JB |
455 | } |
456 | ||
fb733336 JM |
457 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
458 | struct sk_buff *skb) | |
459 | { | |
460 | if (!ieee80211_is_mgmt(fc)) | |
461 | return 0; | |
462 | ||
c2c98fde | 463 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
464 | return 0; |
465 | ||
d8ca16db | 466 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
467 | return 0; |
468 | ||
469 | return 1; | |
470 | } | |
471 | ||
9ae54c84 | 472 | static ieee80211_tx_result |
5cf121c3 | 473 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
474 | { |
475 | struct sta_info *sta = tx->sta; | |
e039fa4a | 476 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 477 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 478 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 479 | |
02f2f1a9 | 480 | if (unlikely(!sta)) |
9ae54c84 | 481 | return TX_CONTINUE; |
e2ebc74d | 482 | |
c2c98fde | 483 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
484 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
485 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 486 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
487 | int ac = skb_get_queue_mapping(tx->skb); |
488 | ||
08b99399 JB |
489 | if (ieee80211_is_mgmt(hdr->frame_control) && |
490 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
491 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
492 | return TX_CONTINUE; | |
493 | } | |
494 | ||
bdcbd8e0 JB |
495 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
496 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
497 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
498 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
499 | |
500 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
501 | spin_lock(&sta->ps_lock); | |
502 | /* | |
503 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
504 | * been queued to pending queue. No reordering can happen, go | |
505 | * ahead and Tx the packet. | |
506 | */ | |
507 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
508 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
509 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
510 | spin_unlock(&sta->ps_lock); |
511 | return TX_CONTINUE; | |
512 | } | |
513 | ||
948d887d JB |
514 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
515 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
516 | ps_dbg(tx->sdata, |
517 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
518 | sta->sta.addr, ac); | |
c3e7724b | 519 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
520 | } else |
521 | tx->local->total_ps_buffered++; | |
004c872e | 522 | |
e039fa4a | 523 | info->control.jiffies = jiffies; |
5061b0c2 | 524 | info->control.vif = &tx->sdata->vif; |
cc20ff2c | 525 | info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
03c8c06f | 526 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 527 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 528 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
529 | |
530 | if (!timer_pending(&local->sta_cleanup)) | |
531 | mod_timer(&local->sta_cleanup, | |
532 | round_jiffies(jiffies + | |
533 | STA_INFO_CLEANUP_INTERVAL)); | |
534 | ||
c868cb35 JB |
535 | /* |
536 | * We queued up some frames, so the TIM bit might | |
537 | * need to be set, recalculate it. | |
538 | */ | |
539 | sta_info_recalc_tim(sta); | |
540 | ||
9ae54c84 | 541 | return TX_QUEUED; |
bdcbd8e0 JB |
542 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
543 | ps_dbg(tx->sdata, | |
544 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
545 | sta->sta.addr); | |
e2ebc74d | 546 | } |
e2ebc74d | 547 | |
9ae54c84 | 548 | return TX_CONTINUE; |
e2ebc74d JB |
549 | } |
550 | ||
d9e8a70f | 551 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 552 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 553 | { |
5cf121c3 | 554 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 555 | return TX_CONTINUE; |
e2ebc74d | 556 | |
5cf121c3 | 557 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
558 | return ieee80211_tx_h_unicast_ps_buf(tx); |
559 | else | |
560 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
561 | } | |
562 | ||
a621fa4d JB |
563 | static ieee80211_tx_result debug_noinline |
564 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
565 | { | |
566 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
567 | ||
af61a165 JB |
568 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
569 | if (tx->sdata->control_port_no_encrypt) | |
570 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
571 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
9c1c98a3 | 572 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
af61a165 | 573 | } |
a621fa4d JB |
574 | |
575 | return TX_CONTINUE; | |
576 | } | |
577 | ||
d9e8a70f | 578 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 579 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 580 | { |
46e6de15 | 581 | struct ieee80211_key *key; |
e039fa4a | 582 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 583 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 584 | |
a0761a30 | 585 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) { |
e2ebc74d | 586 | tx->key = NULL; |
a0761a30 JB |
587 | return TX_CONTINUE; |
588 | } | |
589 | ||
590 | if (tx->sta && | |
591 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 592 | tx->key = key; |
46f6b060 MH |
593 | else if (ieee80211_is_group_privacy_action(tx->skb) && |
594 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
595 | tx->key = key; | |
3cfcf6ac | 596 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 597 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 598 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
599 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
600 | tx->key = key; | |
f7e0104c JB |
601 | else if (is_multicast_ether_addr(hdr->addr1) && |
602 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
603 | tx->key = key; | |
604 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
605 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 606 | tx->key = key; |
e8f4fb7c | 607 | else |
4922f71f | 608 | tx->key = NULL; |
e2ebc74d JB |
609 | |
610 | if (tx->key) { | |
813d7669 JB |
611 | bool skip_hw = false; |
612 | ||
011bfcc4 | 613 | /* TODO: add threshold stuff again */ |
176e4f84 | 614 | |
97359d12 JB |
615 | switch (tx->key->conf.cipher) { |
616 | case WLAN_CIPHER_SUITE_WEP40: | |
617 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 618 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 619 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
620 | tx->key = NULL; |
621 | break; | |
97359d12 | 622 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 623 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
624 | case WLAN_CIPHER_SUITE_GCMP: |
625 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
626 | if (!ieee80211_is_data_present(hdr->frame_control) && |
627 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
46f6b060 MH |
628 | tx->skb) && |
629 | !ieee80211_is_group_privacy_action(tx->skb)) | |
fb733336 | 630 | tx->key = NULL; |
3b43a187 KV |
631 | else |
632 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 633 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 634 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 635 | break; |
97359d12 | 636 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 637 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
638 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
639 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
640 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
641 | tx->key = NULL; | |
642 | break; | |
176e4f84 | 643 | } |
813d7669 | 644 | |
e54faf29 JB |
645 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
646 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
647 | return TX_DROP; |
648 | ||
f12553eb | 649 | if (!skip_hw && tx->key && |
382b1655 | 650 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 651 | info->control.hw_key = &tx->key->conf; |
a0761a30 JB |
652 | } else if (!ieee80211_is_mgmt(hdr->frame_control) && tx->sta && |
653 | test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) { | |
654 | return TX_DROP; | |
e2ebc74d JB |
655 | } |
656 | ||
9ae54c84 | 657 | return TX_CONTINUE; |
e2ebc74d JB |
658 | } |
659 | ||
d9e8a70f | 660 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 661 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 662 | { |
e039fa4a | 663 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
664 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
665 | struct ieee80211_supported_band *sband; | |
a2c40249 | 666 | u32 len; |
e6a9854b | 667 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 668 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 669 | bool assoc = false; |
8318d78a | 670 | |
e6a9854b | 671 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 672 | |
2d56577b | 673 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 674 | |
a2c40249 | 675 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 676 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
677 | |
678 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 679 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
680 | txrc.sband = sband; |
681 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
682 | txrc.skb = tx->skb; | |
683 | txrc.reported_rate.idx = -1; | |
2d56577b | 684 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
2ffbe6d3 FF |
685 | |
686 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
687 | txrc.rate_idx_mcs_mask = | |
688 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
689 | ||
8f0729b1 | 690 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 691 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
5765f9f6 BVB |
692 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC || |
693 | tx->sdata->vif.type == NL80211_IFTYPE_OCB); | |
e6a9854b JB |
694 | |
695 | /* set up RTS protection if desired */ | |
b9a5f8ca | 696 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 697 | txrc.rts = true; |
e2ebc74d | 698 | } |
e2ebc74d | 699 | |
0d528d85 | 700 | info->control.use_rts = txrc.rts; |
991fec09 FF |
701 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
702 | ||
e6a9854b JB |
703 | /* |
704 | * Use short preamble if the BSS can handle it, but not for | |
705 | * management frames unless we know the receiver can handle | |
706 | * that -- the management frame might be to a station that | |
707 | * just wants a probe response. | |
708 | */ | |
709 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
710 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 711 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
712 | txrc.short_preamble = true; |
713 | ||
714 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 715 | |
dfdfc2be SE |
716 | /* don't ask rate control when rate already injected via radiotap */ |
717 | if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT) | |
718 | return TX_CONTINUE; | |
719 | ||
c2c98fde JB |
720 | if (tx->sta) |
721 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
722 | |
723 | /* | |
724 | * Lets not bother rate control if we're associated and cannot | |
725 | * talk to the sta. This should not happen. | |
726 | */ | |
c2c98fde | 727 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
728 | !rate_usable_index_exists(sband, &tx->sta->sta), |
729 | "%s: Dropped data frame as no usable bitrate found while " | |
730 | "scanning and associated. Target station: " | |
731 | "%pM on %d GHz band\n", | |
47846c9b | 732 | tx->sdata->name, hdr->addr1, |
2d56577b | 733 | info->band ? 5 : 2)) |
b770b43e | 734 | return TX_DROP; |
2e92e6f2 | 735 | |
b770b43e LR |
736 | /* |
737 | * If we're associated with the sta at this point we know we can at | |
738 | * least send the frame at the lowest bit rate. | |
739 | */ | |
e6a9854b JB |
740 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
741 | ||
0d528d85 FF |
742 | if (tx->sta && !info->control.skip_table) |
743 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
744 | ||
745 | if (unlikely(info->control.rates[0].idx < 0)) { | |
746 | if (ratetbl) { | |
747 | struct ieee80211_tx_rate rate = { | |
748 | .idx = ratetbl->rate[0].idx, | |
749 | .flags = ratetbl->rate[0].flags, | |
750 | .count = ratetbl->rate[0].count | |
751 | }; | |
752 | ||
753 | if (ratetbl->rate[0].idx < 0) | |
754 | return TX_DROP; | |
755 | ||
756 | tx->rate = rate; | |
757 | } else { | |
758 | return TX_DROP; | |
759 | } | |
760 | } else { | |
761 | tx->rate = info->control.rates[0]; | |
762 | } | |
e6a9854b | 763 | |
c1ce5a74 | 764 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 765 | txrc.reported_rate = tx->rate; |
c1ce5a74 | 766 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
e5a9f8d0 | 767 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
c1ce5a74 | 768 | } else if (tx->sta) |
e5a9f8d0 | 769 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
e039fa4a | 770 | |
0d528d85 FF |
771 | if (ratetbl) |
772 | return TX_CONTINUE; | |
773 | ||
e6a9854b JB |
774 | if (unlikely(!info->control.rates[0].count)) |
775 | info->control.rates[0].count = 1; | |
e2ebc74d | 776 | |
9955151d GS |
777 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
778 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
779 | info->control.rates[0].count = 1; | |
780 | ||
e6a9854b JB |
781 | return TX_CONTINUE; |
782 | } | |
783 | ||
ba8c3d6f FF |
784 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
785 | { | |
786 | u16 *seq = &sta->tid_seq[tid]; | |
787 | __le16 ret = cpu_to_le16(*seq); | |
788 | ||
789 | /* Increase the sequence number. */ | |
790 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
791 | ||
792 | return ret; | |
793 | } | |
794 | ||
f591fa5d JB |
795 | static ieee80211_tx_result debug_noinline |
796 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
797 | { | |
798 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
799 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
f591fa5d JB |
800 | int tid; |
801 | ||
25d834e1 JB |
802 | /* |
803 | * Packet injection may want to control the sequence | |
804 | * number, if we have no matching interface then we | |
805 | * neither assign one ourselves nor ask the driver to. | |
806 | */ | |
5061b0c2 | 807 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
808 | return TX_CONTINUE; |
809 | ||
f591fa5d JB |
810 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
811 | return TX_CONTINUE; | |
812 | ||
813 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
814 | return TX_CONTINUE; | |
815 | ||
49a59543 JB |
816 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
817 | return TX_CONTINUE; | |
818 | ||
29c3e95f MV |
819 | if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO) |
820 | return TX_CONTINUE; | |
821 | ||
94778280 JB |
822 | /* |
823 | * Anything but QoS data that has a sequence number field | |
824 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
825 | * counter. QoS data frames with a multicast destination |
826 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 827 | */ |
c4c205f3 BC |
828 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
829 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 830 | /* driver should assign sequence number */ |
f591fa5d | 831 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
832 | /* for pure STA mode without beacons, we can do it */ |
833 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
834 | tx->sdata->sequence_number += 0x10; | |
79c892b8 | 835 | if (tx->sta) |
e5a9f8d0 | 836 | tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++; |
f591fa5d JB |
837 | return TX_CONTINUE; |
838 | } | |
839 | ||
840 | /* | |
841 | * This should be true for injected/management frames only, for | |
842 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
843 | * above since they are not QoS-data frames. | |
844 | */ | |
845 | if (!tx->sta) | |
846 | return TX_CONTINUE; | |
847 | ||
848 | /* include per-STA, per-TID sequence counter */ | |
a1f2ba04 | 849 | tid = ieee80211_get_tid(hdr); |
e5a9f8d0 | 850 | tx->sta->tx_stats.msdu[tid]++; |
f591fa5d | 851 | |
bb42f2d1 | 852 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); |
f591fa5d JB |
853 | |
854 | return TX_CONTINUE; | |
855 | } | |
856 | ||
252b86c4 | 857 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
858 | struct sk_buff *skb, int hdrlen, |
859 | int frag_threshold) | |
860 | { | |
252b86c4 | 861 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 862 | struct ieee80211_tx_info *info; |
252b86c4 | 863 | struct sk_buff *tmp; |
2de8e0d9 JB |
864 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
865 | int pos = hdrlen + per_fragm; | |
866 | int rem = skb->len - hdrlen - per_fragm; | |
867 | ||
868 | if (WARN_ON(rem < 0)) | |
869 | return -EINVAL; | |
870 | ||
252b86c4 JB |
871 | /* first fragment was already added to queue by caller */ |
872 | ||
2de8e0d9 JB |
873 | while (rem) { |
874 | int fraglen = per_fragm; | |
875 | ||
876 | if (fraglen > rem) | |
877 | fraglen = rem; | |
878 | rem -= fraglen; | |
879 | tmp = dev_alloc_skb(local->tx_headroom + | |
880 | frag_threshold + | |
2475b1cc | 881 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
882 | IEEE80211_ENCRYPT_TAILROOM); |
883 | if (!tmp) | |
884 | return -ENOMEM; | |
252b86c4 JB |
885 | |
886 | __skb_queue_tail(&tx->skbs, tmp); | |
887 | ||
2475b1cc MS |
888 | skb_reserve(tmp, |
889 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
890 | ||
2de8e0d9 JB |
891 | /* copy control information */ |
892 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
893 | |
894 | info = IEEE80211_SKB_CB(tmp); | |
895 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
896 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
897 | ||
898 | if (rem) | |
899 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
900 | ||
2de8e0d9 JB |
901 | skb_copy_queue_mapping(tmp, skb); |
902 | tmp->priority = skb->priority; | |
2de8e0d9 | 903 | tmp->dev = skb->dev; |
2de8e0d9 JB |
904 | |
905 | /* copy header and data */ | |
59ae1d12 JB |
906 | skb_put_data(tmp, skb->data, hdrlen); |
907 | skb_put_data(tmp, skb->data + pos, fraglen); | |
2de8e0d9 JB |
908 | |
909 | pos += fraglen; | |
910 | } | |
911 | ||
252b86c4 | 912 | /* adjust first fragment's length */ |
338f977f | 913 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
914 | return 0; |
915 | } | |
916 | ||
d9e8a70f | 917 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
918 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
919 | { | |
2de8e0d9 JB |
920 | struct sk_buff *skb = tx->skb; |
921 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
922 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 923 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
924 | int hdrlen; |
925 | int fragnum; | |
e2454948 | 926 | |
252b86c4 JB |
927 | /* no matter what happens, tx->skb moves to tx->skbs */ |
928 | __skb_queue_tail(&tx->skbs, skb); | |
929 | tx->skb = NULL; | |
930 | ||
a26eb27a JB |
931 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
932 | return TX_CONTINUE; | |
933 | ||
f3fe4e93 | 934 | if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) |
e2454948 JB |
935 | return TX_CONTINUE; |
936 | ||
eefce91a JB |
937 | /* |
938 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 939 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 940 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 941 | */ |
8b30b1fe | 942 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
943 | return TX_DROP; |
944 | ||
065e9605 | 945 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 946 | |
a26eb27a | 947 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 948 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 949 | return TX_DROP; |
e6a9854b | 950 | |
2de8e0d9 JB |
951 | /* |
952 | * Now fragment the frame. This will allocate all the fragments and | |
953 | * chain them (using skb as the first fragment) to skb->next. | |
954 | * During transmission, we will remove the successfully transmitted | |
955 | * fragments from this list. When the low-level driver rejects one | |
956 | * of the fragments then we will simply pretend to accept the skb | |
957 | * but store it away as pending. | |
958 | */ | |
252b86c4 | 959 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 960 | return TX_DROP; |
e6a9854b | 961 | |
2de8e0d9 JB |
962 | /* update duration/seq/flags of fragments */ |
963 | fragnum = 0; | |
252b86c4 JB |
964 | |
965 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 966 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 967 | |
2de8e0d9 JB |
968 | hdr = (void *)skb->data; |
969 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 970 | |
252b86c4 | 971 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 972 | hdr->frame_control |= morefrags; |
e6a9854b JB |
973 | /* |
974 | * No multi-rate retries for fragmented frames, that | |
975 | * would completely throw off the NAV at other STAs. | |
976 | */ | |
977 | info->control.rates[1].idx = -1; | |
978 | info->control.rates[2].idx = -1; | |
979 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 980 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 981 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
982 | } else { |
983 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 984 | } |
2de8e0d9 JB |
985 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
986 | fragnum++; | |
252b86c4 | 987 | } |
e2ebc74d | 988 | |
9ae54c84 | 989 | return TX_CONTINUE; |
e2ebc74d JB |
990 | } |
991 | ||
feff1f2f JB |
992 | static ieee80211_tx_result debug_noinline |
993 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
994 | { | |
252b86c4 | 995 | struct sk_buff *skb; |
560d2682 | 996 | int ac = -1; |
feff1f2f JB |
997 | |
998 | if (!tx->sta) | |
999 | return TX_CONTINUE; | |
1000 | ||
252b86c4 | 1001 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 1002 | ac = skb_get_queue_mapping(skb); |
e5a9f8d0 | 1003 | tx->sta->tx_stats.bytes[ac] += skb->len; |
252b86c4 | 1004 | } |
560d2682 | 1005 | if (ac >= 0) |
e5a9f8d0 | 1006 | tx->sta->tx_stats.packets[ac]++; |
feff1f2f JB |
1007 | |
1008 | return TX_CONTINUE; | |
1009 | } | |
1010 | ||
d9e8a70f | 1011 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1012 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1013 | { | |
1014 | if (!tx->key) | |
1015 | return TX_CONTINUE; | |
1016 | ||
97359d12 JB |
1017 | switch (tx->key->conf.cipher) { |
1018 | case WLAN_CIPHER_SUITE_WEP40: | |
1019 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1020 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1021 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1022 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1023 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1024 | return ieee80211_crypto_ccmp_encrypt( |
1025 | tx, IEEE80211_CCMP_MIC_LEN); | |
1026 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1027 | return ieee80211_crypto_ccmp_encrypt( | |
1028 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1029 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1030 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1031 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1032 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1033 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1034 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1035 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1036 | case WLAN_CIPHER_SUITE_GCMP: |
1037 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1038 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1039 | default: |
d32a1028 | 1040 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1041 | } |
1042 | ||
e2454948 JB |
1043 | return TX_DROP; |
1044 | } | |
1045 | ||
d9e8a70f | 1046 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1047 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1048 | { | |
252b86c4 | 1049 | struct sk_buff *skb; |
2de8e0d9 JB |
1050 | struct ieee80211_hdr *hdr; |
1051 | int next_len; | |
1052 | bool group_addr; | |
03f93c3d | 1053 | |
252b86c4 | 1054 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1055 | hdr = (void *) skb->data; |
7e0aae47 JM |
1056 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1057 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1058 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1059 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1060 | next_len = next->len; | |
1061 | } else | |
1062 | next_len = 0; | |
2de8e0d9 | 1063 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1064 | |
2de8e0d9 | 1065 | hdr->duration_id = |
252b86c4 JB |
1066 | ieee80211_duration(tx, skb, group_addr, next_len); |
1067 | } | |
03f93c3d JB |
1068 | |
1069 | return TX_CONTINUE; | |
1070 | } | |
1071 | ||
e2ebc74d JB |
1072 | /* actual transmit path */ |
1073 | ||
a622ab72 JB |
1074 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1075 | struct sk_buff *skb, | |
1076 | struct ieee80211_tx_info *info, | |
1077 | struct tid_ampdu_tx *tid_tx, | |
1078 | int tid) | |
1079 | { | |
1080 | bool queued = false; | |
285fa695 | 1081 | bool reset_agg_timer = false; |
aa454580 | 1082 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1083 | |
1084 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1085 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1086 | reset_agg_timer = true; |
0ab33703 JB |
1087 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1088 | /* | |
1089 | * nothing -- this aggregation session is being started | |
1090 | * but that might still fail with the driver | |
1091 | */ | |
ba8c3d6f | 1092 | } else if (!tx->sta->sta.txq[tid]) { |
a622ab72 JB |
1093 | spin_lock(&tx->sta->lock); |
1094 | /* | |
1095 | * Need to re-check now, because we may get here | |
1096 | * | |
1097 | * 1) in the window during which the setup is actually | |
1098 | * already done, but not marked yet because not all | |
1099 | * packets are spliced over to the driver pending | |
1100 | * queue yet -- if this happened we acquire the lock | |
1101 | * either before or after the splice happens, but | |
1102 | * need to recheck which of these cases happened. | |
1103 | * | |
1104 | * 2) during session teardown, if the OPERATIONAL bit | |
1105 | * was cleared due to the teardown but the pointer | |
1106 | * hasn't been assigned NULL yet (or we loaded it | |
1107 | * before it was assigned) -- in this case it may | |
1108 | * now be NULL which means we should just let the | |
1109 | * packet pass through because splicing the frames | |
1110 | * back is already done. | |
1111 | */ | |
40b275b6 | 1112 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1113 | |
1114 | if (!tid_tx) { | |
1115 | /* do nothing, let packet pass through */ | |
1116 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1117 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1118 | reset_agg_timer = true; |
a622ab72 JB |
1119 | } else { |
1120 | queued = true; | |
f6d4671a EG |
1121 | if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) { |
1122 | clear_sta_flag(tx->sta, WLAN_STA_SP); | |
1123 | ps_dbg(tx->sta->sdata, | |
1124 | "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n", | |
1125 | tx->sta->sta.addr, tx->sta->sta.aid); | |
1126 | } | |
a622ab72 | 1127 | info->control.vif = &tx->sdata->vif; |
cc20ff2c | 1128 | info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
facde7f3 | 1129 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1130 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1131 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1132 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1133 | } |
1134 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1135 | |
1136 | if (purge_skb) | |
c3e7724b | 1137 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1138 | } |
1139 | ||
285fa695 | 1140 | /* reset session timer */ |
914eac24 | 1141 | if (reset_agg_timer) |
12d3952f | 1142 | tid_tx->last_tx = jiffies; |
285fa695 | 1143 | |
a622ab72 JB |
1144 | return queued; |
1145 | } | |
1146 | ||
58d4185e JB |
1147 | /* |
1148 | * initialises @tx | |
7c10770f JB |
1149 | * pass %NULL for the station if unknown, a valid pointer if known |
1150 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1151 | */ |
9ae54c84 | 1152 | static ieee80211_tx_result |
3b8d81e0 JB |
1153 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1154 | struct ieee80211_tx_data *tx, | |
7c10770f | 1155 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1156 | { |
3b8d81e0 | 1157 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1158 | struct ieee80211_hdr *hdr; |
e039fa4a | 1159 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1160 | int tid; |
e2ebc74d JB |
1161 | |
1162 | memset(tx, 0, sizeof(*tx)); | |
1163 | tx->skb = skb; | |
e2ebc74d | 1164 | tx->local = local; |
3b8d81e0 | 1165 | tx->sdata = sdata; |
252b86c4 | 1166 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1167 | |
cd8ffc80 JB |
1168 | /* |
1169 | * If this flag is set to true anywhere, and we get here, | |
1170 | * we are doing the needed processing, so remove the flag | |
1171 | * now. | |
1172 | */ | |
cc20ff2c | 1173 | info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING; |
cd8ffc80 | 1174 | |
58d4185e JB |
1175 | hdr = (struct ieee80211_hdr *) skb->data; |
1176 | ||
7c10770f JB |
1177 | if (likely(sta)) { |
1178 | if (!IS_ERR(sta)) | |
1179 | tx->sta = sta; | |
1180 | } else { | |
1181 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1182 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1183 | if (!tx->sta && sdata->wdev.use_4addr) | |
1184 | return TX_DROP; | |
1185 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1186 | IEEE80211_TX_CTL_INJECTED) || | |
1187 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1188 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1189 | } | |
1190 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1191 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1192 | } |
58d4185e | 1193 | |
cd8ffc80 | 1194 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1195 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
30686bf7 JB |
1196 | ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) && |
1197 | !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1198 | struct tid_ampdu_tx *tid_tx; |
1199 | ||
a1f2ba04 | 1200 | tid = ieee80211_get_tid(hdr); |
8b30b1fe | 1201 | |
a622ab72 JB |
1202 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1203 | if (tid_tx) { | |
1204 | bool queued; | |
cd8ffc80 | 1205 | |
a622ab72 JB |
1206 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1207 | tid_tx, tid); | |
1208 | ||
1209 | if (unlikely(queued)) | |
1210 | return TX_QUEUED; | |
1211 | } | |
8b30b1fe S |
1212 | } |
1213 | ||
badffb72 | 1214 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1215 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1216 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1217 | } else |
5cf121c3 | 1218 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1219 | |
a26eb27a JB |
1220 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1221 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1222 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1223 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1224 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1225 | } |
1226 | ||
e2ebc74d | 1227 | if (!tx->sta) |
e039fa4a | 1228 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 | 1229 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) { |
e039fa4a | 1230 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 FF |
1231 | ieee80211_check_fast_xmit(tx->sta); |
1232 | } | |
58d4185e | 1233 | |
e039fa4a | 1234 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1235 | |
9ae54c84 | 1236 | return TX_CONTINUE; |
e2ebc74d JB |
1237 | } |
1238 | ||
80a83cfc MK |
1239 | static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local, |
1240 | struct ieee80211_vif *vif, | |
dbef5362 | 1241 | struct sta_info *sta, |
80a83cfc | 1242 | struct sk_buff *skb) |
ba8c3d6f FF |
1243 | { |
1244 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
ba8c3d6f | 1245 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
ba8c3d6f | 1246 | struct ieee80211_txq *txq = NULL; |
ba8c3d6f | 1247 | |
c3732a7b FF |
1248 | if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) || |
1249 | (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)) | |
80a83cfc | 1250 | return NULL; |
ba8c3d6f | 1251 | |
cc20ff2c | 1252 | if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) && |
50ff477a | 1253 | unlikely(!ieee80211_is_data_present(hdr->frame_control))) { |
adf8ed01 | 1254 | if ((!ieee80211_is_mgmt(hdr->frame_control) || |
0eeb2b67 SS |
1255 | ieee80211_is_bufferable_mmpdu(hdr->frame_control) || |
1256 | vif->type == NL80211_IFTYPE_STATION) && | |
adf8ed01 JB |
1257 | sta && sta->uploaded) { |
1258 | /* | |
1259 | * This will be NULL if the driver didn't set the | |
1260 | * opt-in hardware flag. | |
1261 | */ | |
1262 | txq = sta->sta.txq[IEEE80211_NUM_TIDS]; | |
1263 | } | |
1264 | } else if (sta) { | |
ba8c3d6f FF |
1265 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; |
1266 | ||
dbef5362 MK |
1267 | if (!sta->uploaded) |
1268 | return NULL; | |
1269 | ||
1270 | txq = sta->sta.txq[tid]; | |
ba8c3d6f FF |
1271 | } else if (vif) { |
1272 | txq = vif->txq; | |
1273 | } | |
1274 | ||
1275 | if (!txq) | |
80a83cfc | 1276 | return NULL; |
ba8c3d6f | 1277 | |
80a83cfc MK |
1278 | return to_txq_info(txq); |
1279 | } | |
ba8c3d6f | 1280 | |
5caa328e MK |
1281 | static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb) |
1282 | { | |
1283 | IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time(); | |
1284 | } | |
1285 | ||
5caa328e MK |
1286 | static u32 codel_skb_len_func(const struct sk_buff *skb) |
1287 | { | |
1288 | return skb->len; | |
1289 | } | |
1290 | ||
1291 | static codel_time_t codel_skb_time_func(const struct sk_buff *skb) | |
1292 | { | |
1293 | const struct ieee80211_tx_info *info; | |
1294 | ||
1295 | info = (const struct ieee80211_tx_info *)skb->cb; | |
1296 | return info->control.enqueue_time; | |
1297 | } | |
1298 | ||
1299 | static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars, | |
1300 | void *ctx) | |
1301 | { | |
1302 | struct ieee80211_local *local; | |
1303 | struct txq_info *txqi; | |
1304 | struct fq *fq; | |
1305 | struct fq_flow *flow; | |
1306 | ||
1307 | txqi = ctx; | |
1308 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1309 | fq = &local->fq; | |
1310 | ||
1311 | if (cvars == &txqi->def_cvars) | |
1312 | flow = &txqi->def_flow; | |
1313 | else | |
1314 | flow = &fq->flows[cvars - local->cvars]; | |
1315 | ||
1316 | return fq_flow_dequeue(fq, flow); | |
1317 | } | |
1318 | ||
1319 | static void codel_drop_func(struct sk_buff *skb, | |
1320 | void *ctx) | |
1321 | { | |
1322 | struct ieee80211_local *local; | |
1323 | struct ieee80211_hw *hw; | |
1324 | struct txq_info *txqi; | |
1325 | ||
1326 | txqi = ctx; | |
1327 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1328 | hw = &local->hw; | |
1329 | ||
1330 | ieee80211_free_txskb(hw, skb); | |
1331 | } | |
1332 | ||
fa962b92 MK |
1333 | static struct sk_buff *fq_tin_dequeue_func(struct fq *fq, |
1334 | struct fq_tin *tin, | |
1335 | struct fq_flow *flow) | |
1336 | { | |
5caa328e MK |
1337 | struct ieee80211_local *local; |
1338 | struct txq_info *txqi; | |
1339 | struct codel_vars *cvars; | |
1340 | struct codel_params *cparams; | |
1341 | struct codel_stats *cstats; | |
1342 | ||
1343 | local = container_of(fq, struct ieee80211_local, fq); | |
1344 | txqi = container_of(tin, struct txq_info, tin); | |
8d51dbb8 | 1345 | cstats = &txqi->cstats; |
5caa328e | 1346 | |
484a54c2 THJ |
1347 | if (txqi->txq.sta) { |
1348 | struct sta_info *sta = container_of(txqi->txq.sta, | |
1349 | struct sta_info, sta); | |
1350 | cparams = &sta->cparams; | |
1351 | } else { | |
1352 | cparams = &local->cparams; | |
1353 | } | |
1354 | ||
5caa328e MK |
1355 | if (flow == &txqi->def_flow) |
1356 | cvars = &txqi->def_cvars; | |
1357 | else | |
1358 | cvars = &local->cvars[flow - fq->flows]; | |
1359 | ||
1360 | return codel_dequeue(txqi, | |
1361 | &flow->backlog, | |
1362 | cparams, | |
1363 | cvars, | |
1364 | cstats, | |
1365 | codel_skb_len_func, | |
1366 | codel_skb_time_func, | |
1367 | codel_drop_func, | |
1368 | codel_dequeue_func); | |
fa962b92 MK |
1369 | } |
1370 | ||
1371 | static void fq_skb_free_func(struct fq *fq, | |
1372 | struct fq_tin *tin, | |
1373 | struct fq_flow *flow, | |
1374 | struct sk_buff *skb) | |
1375 | { | |
1376 | struct ieee80211_local *local; | |
1377 | ||
1378 | local = container_of(fq, struct ieee80211_local, fq); | |
1379 | ieee80211_free_txskb(&local->hw, skb); | |
1380 | } | |
1381 | ||
1382 | static struct fq_flow *fq_flow_get_default_func(struct fq *fq, | |
1383 | struct fq_tin *tin, | |
1384 | int idx, | |
1385 | struct sk_buff *skb) | |
1386 | { | |
1387 | struct txq_info *txqi; | |
1388 | ||
1389 | txqi = container_of(tin, struct txq_info, tin); | |
1390 | return &txqi->def_flow; | |
1391 | } | |
1392 | ||
80a83cfc MK |
1393 | static void ieee80211_txq_enqueue(struct ieee80211_local *local, |
1394 | struct txq_info *txqi, | |
1395 | struct sk_buff *skb) | |
1396 | { | |
fa962b92 MK |
1397 | struct fq *fq = &local->fq; |
1398 | struct fq_tin *tin = &txqi->tin; | |
f2af2df8 | 1399 | u32 flow_idx = fq_flow_idx(fq, skb); |
f2ac7e30 | 1400 | |
5caa328e | 1401 | ieee80211_set_skb_enqueue_time(skb); |
f2af2df8 FF |
1402 | |
1403 | spin_lock_bh(&fq->lock); | |
1404 | fq_tin_enqueue(fq, tin, flow_idx, skb, | |
fa962b92 MK |
1405 | fq_skb_free_func, |
1406 | fq_flow_get_default_func); | |
f2af2df8 | 1407 | spin_unlock_bh(&fq->lock); |
fa962b92 | 1408 | } |
ba8c3d6f | 1409 | |
2a9e2579 JB |
1410 | static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin, |
1411 | struct fq_flow *flow, struct sk_buff *skb, | |
1412 | void *data) | |
1413 | { | |
1414 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1415 | ||
1416 | return info->control.vif == data; | |
1417 | } | |
1418 | ||
1419 | void ieee80211_txq_remove_vlan(struct ieee80211_local *local, | |
1420 | struct ieee80211_sub_if_data *sdata) | |
1421 | { | |
1422 | struct fq *fq = &local->fq; | |
1423 | struct txq_info *txqi; | |
1424 | struct fq_tin *tin; | |
1425 | struct ieee80211_sub_if_data *ap; | |
1426 | ||
1427 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) | |
1428 | return; | |
1429 | ||
1430 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1431 | ||
1432 | if (!ap->vif.txq) | |
1433 | return; | |
1434 | ||
1435 | txqi = to_txq_info(ap->vif.txq); | |
1436 | tin = &txqi->tin; | |
1437 | ||
1438 | spin_lock_bh(&fq->lock); | |
1439 | fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif, | |
1440 | fq_skb_free_func); | |
1441 | spin_unlock_bh(&fq->lock); | |
1442 | } | |
1443 | ||
fa962b92 MK |
1444 | void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata, |
1445 | struct sta_info *sta, | |
1446 | struct txq_info *txqi, int tid) | |
1447 | { | |
1448 | fq_tin_init(&txqi->tin); | |
1449 | fq_flow_init(&txqi->def_flow); | |
5caa328e | 1450 | codel_vars_init(&txqi->def_cvars); |
8d51dbb8 | 1451 | codel_stats_init(&txqi->cstats); |
bb42f2d1 | 1452 | __skb_queue_head_init(&txqi->frags); |
18667600 | 1453 | INIT_LIST_HEAD(&txqi->schedule_order); |
fa962b92 MK |
1454 | |
1455 | txqi->txq.vif = &sdata->vif; | |
1456 | ||
adf8ed01 | 1457 | if (!sta) { |
fa962b92 MK |
1458 | sdata->vif.txq = &txqi->txq; |
1459 | txqi->txq.tid = 0; | |
1460 | txqi->txq.ac = IEEE80211_AC_BE; | |
adf8ed01 JB |
1461 | |
1462 | return; | |
80a83cfc | 1463 | } |
adf8ed01 JB |
1464 | |
1465 | if (tid == IEEE80211_NUM_TIDS) { | |
0eeb2b67 SS |
1466 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
1467 | /* Drivers need to opt in to the management MPDU TXQ */ | |
1468 | if (!ieee80211_hw_check(&sdata->local->hw, | |
1469 | STA_MMPDU_TXQ)) | |
1470 | return; | |
1471 | } else if (!ieee80211_hw_check(&sdata->local->hw, | |
1472 | BUFF_MMPDU_TXQ)) { | |
1473 | /* Drivers need to opt in to the bufferable MMPDU TXQ */ | |
adf8ed01 | 1474 | return; |
0eeb2b67 | 1475 | } |
adf8ed01 JB |
1476 | txqi->txq.ac = IEEE80211_AC_VO; |
1477 | } else { | |
1478 | txqi->txq.ac = ieee80211_ac_from_tid(tid); | |
1479 | } | |
1480 | ||
1481 | txqi->txq.sta = &sta->sta; | |
1482 | txqi->txq.tid = tid; | |
1483 | sta->sta.txq[tid] = &txqi->txq; | |
fa962b92 | 1484 | } |
ba8c3d6f | 1485 | |
fa962b92 MK |
1486 | void ieee80211_txq_purge(struct ieee80211_local *local, |
1487 | struct txq_info *txqi) | |
1488 | { | |
1489 | struct fq *fq = &local->fq; | |
1490 | struct fq_tin *tin = &txqi->tin; | |
1491 | ||
b4809e94 | 1492 | spin_lock_bh(&fq->lock); |
fa962b92 | 1493 | fq_tin_reset(fq, tin, fq_skb_free_func); |
bb42f2d1 | 1494 | ieee80211_purge_tx_queue(&local->hw, &txqi->frags); |
b4809e94 THJ |
1495 | spin_unlock_bh(&fq->lock); |
1496 | ||
18667600 THJ |
1497 | spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]); |
1498 | list_del_init(&txqi->schedule_order); | |
1499 | spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]); | |
fa962b92 MK |
1500 | } |
1501 | ||
2fe4a29a THJ |
1502 | void ieee80211_txq_set_params(struct ieee80211_local *local) |
1503 | { | |
1504 | if (local->hw.wiphy->txq_limit) | |
1505 | local->fq.limit = local->hw.wiphy->txq_limit; | |
1506 | else | |
1507 | local->hw.wiphy->txq_limit = local->fq.limit; | |
1508 | ||
1509 | if (local->hw.wiphy->txq_memory_limit) | |
1510 | local->fq.memory_limit = local->hw.wiphy->txq_memory_limit; | |
1511 | else | |
1512 | local->hw.wiphy->txq_memory_limit = local->fq.memory_limit; | |
1513 | ||
1514 | if (local->hw.wiphy->txq_quantum) | |
1515 | local->fq.quantum = local->hw.wiphy->txq_quantum; | |
1516 | else | |
1517 | local->hw.wiphy->txq_quantum = local->fq.quantum; | |
1518 | } | |
1519 | ||
fa962b92 MK |
1520 | int ieee80211_txq_setup_flows(struct ieee80211_local *local) |
1521 | { | |
1522 | struct fq *fq = &local->fq; | |
1523 | int ret; | |
5caa328e | 1524 | int i; |
3ff23cd5 THJ |
1525 | bool supp_vht = false; |
1526 | enum nl80211_band band; | |
fa962b92 MK |
1527 | |
1528 | if (!local->ops->wake_tx_queue) | |
1529 | return 0; | |
1530 | ||
1531 | ret = fq_init(fq, 4096); | |
1532 | if (ret) | |
1533 | return ret; | |
1534 | ||
3ff23cd5 THJ |
1535 | /* |
1536 | * If the hardware doesn't support VHT, it is safe to limit the maximum | |
1537 | * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n. | |
1538 | */ | |
1539 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
1540 | struct ieee80211_supported_band *sband; | |
1541 | ||
1542 | sband = local->hw.wiphy->bands[band]; | |
1543 | if (!sband) | |
1544 | continue; | |
1545 | ||
1546 | supp_vht = supp_vht || sband->vht_cap.vht_supported; | |
1547 | } | |
1548 | ||
1549 | if (!supp_vht) | |
1550 | fq->memory_limit = 4 << 20; /* 4 Mbytes */ | |
1551 | ||
5caa328e | 1552 | codel_params_init(&local->cparams); |
5caa328e MK |
1553 | local->cparams.interval = MS2TIME(100); |
1554 | local->cparams.target = MS2TIME(20); | |
1555 | local->cparams.ecn = true; | |
1556 | ||
1557 | local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]), | |
1558 | GFP_KERNEL); | |
1559 | if (!local->cvars) { | |
59a7c828 | 1560 | spin_lock_bh(&fq->lock); |
5caa328e | 1561 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1562 | spin_unlock_bh(&fq->lock); |
5caa328e MK |
1563 | return -ENOMEM; |
1564 | } | |
1565 | ||
1566 | for (i = 0; i < fq->flows_cnt; i++) | |
1567 | codel_vars_init(&local->cvars[i]); | |
1568 | ||
2fe4a29a THJ |
1569 | ieee80211_txq_set_params(local); |
1570 | ||
fa962b92 MK |
1571 | return 0; |
1572 | } | |
1573 | ||
1574 | void ieee80211_txq_teardown_flows(struct ieee80211_local *local) | |
1575 | { | |
1576 | struct fq *fq = &local->fq; | |
1577 | ||
1578 | if (!local->ops->wake_tx_queue) | |
1579 | return; | |
1580 | ||
5caa328e MK |
1581 | kfree(local->cvars); |
1582 | local->cvars = NULL; | |
1583 | ||
59a7c828 | 1584 | spin_lock_bh(&fq->lock); |
fa962b92 | 1585 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1586 | spin_unlock_bh(&fq->lock); |
ba8c3d6f FF |
1587 | } |
1588 | ||
bb42f2d1 THJ |
1589 | static bool ieee80211_queue_skb(struct ieee80211_local *local, |
1590 | struct ieee80211_sub_if_data *sdata, | |
1591 | struct sta_info *sta, | |
1592 | struct sk_buff *skb) | |
1593 | { | |
bb42f2d1 THJ |
1594 | struct ieee80211_vif *vif; |
1595 | struct txq_info *txqi; | |
bb42f2d1 THJ |
1596 | |
1597 | if (!local->ops->wake_tx_queue || | |
1598 | sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
1599 | return false; | |
1600 | ||
bb42f2d1 THJ |
1601 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1602 | sdata = container_of(sdata->bss, | |
1603 | struct ieee80211_sub_if_data, u.ap); | |
1604 | ||
1605 | vif = &sdata->vif; | |
dbef5362 | 1606 | txqi = ieee80211_get_txq(local, vif, sta, skb); |
bb42f2d1 THJ |
1607 | |
1608 | if (!txqi) | |
1609 | return false; | |
1610 | ||
bb42f2d1 | 1611 | ieee80211_txq_enqueue(local, txqi, skb); |
bb42f2d1 | 1612 | |
18667600 | 1613 | schedule_and_wake_txq(local, txqi); |
bb42f2d1 THJ |
1614 | |
1615 | return true; | |
1616 | } | |
1617 | ||
11127e91 JB |
1618 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1619 | struct ieee80211_vif *vif, | |
4fd0328d | 1620 | struct sta_info *sta, |
11127e91 JB |
1621 | struct sk_buff_head *skbs, |
1622 | bool txpending) | |
e2ebc74d | 1623 | { |
80a83cfc | 1624 | struct ieee80211_tx_control control = {}; |
252b86c4 | 1625 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1626 | unsigned long flags; |
e2ebc74d | 1627 | |
252b86c4 | 1628 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1629 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1630 | int q = info->hw_queue; | |
1631 | ||
1632 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1633 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1634 | __skb_unlink(skb, skbs); | |
c3e7724b | 1635 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1636 | continue; |
1637 | } | |
1638 | #endif | |
3b8d81e0 JB |
1639 | |
1640 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1641 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1642 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1643 | if (unlikely(info->flags & |
a7679ed5 SF |
1644 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1645 | if (local->queue_stop_reasons[q] & | |
1646 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1647 | /* | |
1648 | * Drop off-channel frames if queues | |
1649 | * are stopped for any reason other | |
1650 | * than off-channel operation. Never | |
1651 | * queue them. | |
1652 | */ | |
1653 | spin_unlock_irqrestore( | |
1654 | &local->queue_stop_reason_lock, | |
1655 | flags); | |
1656 | ieee80211_purge_tx_queue(&local->hw, | |
1657 | skbs); | |
1658 | return true; | |
1659 | } | |
1660 | } else { | |
1661 | ||
6c17b77b | 1662 | /* |
a7679ed5 SF |
1663 | * Since queue is stopped, queue up frames for |
1664 | * later transmission from the tx-pending | |
1665 | * tasklet when the queue is woken again. | |
6c17b77b | 1666 | */ |
a7679ed5 SF |
1667 | if (txpending) |
1668 | skb_queue_splice_init(skbs, | |
1669 | &local->pending[q]); | |
1670 | else | |
1671 | skb_queue_splice_tail_init(skbs, | |
1672 | &local->pending[q]); | |
1673 | ||
1674 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1675 | flags); | |
1676 | return false; | |
6c17b77b | 1677 | } |
7bb45683 | 1678 | } |
3b8d81e0 | 1679 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1680 | |
11127e91 | 1681 | info->control.vif = vif; |
4fd0328d | 1682 | control.sta = sta ? &sta->sta : NULL; |
f0e72851 | 1683 | |
11127e91 | 1684 | __skb_unlink(skb, skbs); |
80a83cfc | 1685 | drv_tx(local, &control, skb); |
11127e91 | 1686 | } |
5061b0c2 | 1687 | |
11127e91 JB |
1688 | return true; |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1693 | */ | |
1694 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1695 | struct sk_buff_head *skbs, int led_len, | |
1696 | struct sta_info *sta, bool txpending) | |
1697 | { | |
1698 | struct ieee80211_tx_info *info; | |
1699 | struct ieee80211_sub_if_data *sdata; | |
1700 | struct ieee80211_vif *vif; | |
11127e91 JB |
1701 | struct sk_buff *skb; |
1702 | bool result = true; | |
1703 | __le16 fc; | |
5061b0c2 | 1704 | |
11127e91 JB |
1705 | if (WARN_ON(skb_queue_empty(skbs))) |
1706 | return true; | |
ec25acc4 | 1707 | |
11127e91 JB |
1708 | skb = skb_peek(skbs); |
1709 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1710 | info = IEEE80211_SKB_CB(skb); | |
1711 | sdata = vif_to_sdata(info->control.vif); | |
1712 | if (sta && !sta->uploaded) | |
1713 | sta = NULL; | |
1714 | ||
11127e91 JB |
1715 | switch (sdata->vif.type) { |
1716 | case NL80211_IFTYPE_MONITOR: | |
d8212184 | 1717 | if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { |
c82b5a74 JB |
1718 | vif = &sdata->vif; |
1719 | break; | |
1720 | } | |
4b6f1dd6 | 1721 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1722 | if (sdata) { |
4b6f1dd6 | 1723 | vif = &sdata->vif; |
3a25a8c8 JB |
1724 | info->hw_queue = |
1725 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
30686bf7 | 1726 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { |
63b4d8b3 | 1727 | ieee80211_purge_tx_queue(&local->hw, skbs); |
3a25a8c8 JB |
1728 | return true; |
1729 | } else | |
4b6f1dd6 | 1730 | vif = NULL; |
11127e91 JB |
1731 | break; |
1732 | case NL80211_IFTYPE_AP_VLAN: | |
1733 | sdata = container_of(sdata->bss, | |
1734 | struct ieee80211_sub_if_data, u.ap); | |
fc0561dc | 1735 | fallthrough; |
11127e91 JB |
1736 | default: |
1737 | vif = &sdata->vif; | |
1738 | break; | |
e2ebc74d | 1739 | } |
2de8e0d9 | 1740 | |
4fd0328d | 1741 | result = ieee80211_tx_frags(local, vif, sta, skbs, txpending); |
11127e91 | 1742 | |
74e4dbfd | 1743 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1744 | |
4db4e0a1 | 1745 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1746 | |
11127e91 | 1747 | return result; |
e2ebc74d JB |
1748 | } |
1749 | ||
97b045d6 JB |
1750 | /* |
1751 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1752 | * frame was dropped or queued. | |
bb42f2d1 THJ |
1753 | * |
1754 | * The handlers are split into an early and late part. The latter is everything | |
1755 | * that can be sensitive to reordering, and will be deferred to after packets | |
1756 | * are dequeued from the intermediate queues (when they are enabled). | |
97b045d6 | 1757 | */ |
bb42f2d1 | 1758 | static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx) |
97b045d6 | 1759 | { |
97b045d6 | 1760 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1761 | |
9aa4aee3 JB |
1762 | #define CALL_TXH(txh) \ |
1763 | do { \ | |
1764 | res = txh(tx); \ | |
1765 | if (res != TX_CONTINUE) \ | |
1766 | goto txh_done; \ | |
1767 | } while (0) | |
1768 | ||
5c1b98a5 | 1769 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1770 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1771 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1772 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1773 | CALL_TXH(ieee80211_tx_h_select_key); |
30686bf7 | 1774 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
af65cd96 | 1775 | CALL_TXH(ieee80211_tx_h_rate_ctrl); |
c6fcf6bc | 1776 | |
bb42f2d1 THJ |
1777 | txh_done: |
1778 | if (unlikely(res == TX_DROP)) { | |
1779 | I802_DEBUG_INC(tx->local->tx_handlers_drop); | |
1780 | if (tx->skb) | |
1781 | ieee80211_free_txskb(&tx->local->hw, tx->skb); | |
1782 | else | |
1783 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); | |
1784 | return -1; | |
1785 | } else if (unlikely(res == TX_QUEUED)) { | |
1786 | I802_DEBUG_INC(tx->local->tx_handlers_queued); | |
1787 | return -1; | |
1788 | } | |
1789 | ||
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | /* | |
1794 | * Late handlers can be called while the sta lock is held. Handlers that can | |
1795 | * cause packets to be generated will cause deadlock! | |
1796 | */ | |
1797 | static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx) | |
1798 | { | |
1799 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
1800 | ieee80211_tx_result res = TX_CONTINUE; | |
1801 | ||
aa5b5492 JB |
1802 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1803 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1804 | tx->skb = NULL; | |
c6fcf6bc | 1805 | goto txh_done; |
aa5b5492 | 1806 | } |
c6fcf6bc JB |
1807 | |
1808 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1809 | CALL_TXH(ieee80211_tx_h_sequence); |
1810 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1811 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1812 | CALL_TXH(ieee80211_tx_h_stats); |
1813 | CALL_TXH(ieee80211_tx_h_encrypt); | |
30686bf7 | 1814 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
8fd369ee | 1815 | CALL_TXH(ieee80211_tx_h_calculate_duration); |
d9e8a70f | 1816 | #undef CALL_TXH |
97b045d6 | 1817 | |
d9e8a70f | 1818 | txh_done: |
97b045d6 | 1819 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1820 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1821 | if (tx->skb) |
c3e7724b | 1822 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1823 | else |
1f98ab7f | 1824 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1825 | return -1; |
1826 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1827 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1828 | return -1; |
1829 | } | |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
bb42f2d1 THJ |
1834 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) |
1835 | { | |
1836 | int r = invoke_tx_handlers_early(tx); | |
1837 | ||
1838 | if (r) | |
1839 | return r; | |
1840 | return invoke_tx_handlers_late(tx); | |
1841 | } | |
1842 | ||
06be6b14 FF |
1843 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1844 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1845 | int band, struct ieee80211_sta **sta) | |
1846 | { | |
1847 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1848 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1849 | struct ieee80211_tx_data tx; | |
88724a81 | 1850 | struct sk_buff *skb2; |
06be6b14 | 1851 | |
7c10770f | 1852 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1853 | return false; |
1854 | ||
1855 | info->band = band; | |
1856 | info->control.vif = vif; | |
1857 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1858 | ||
1859 | if (invoke_tx_handlers(&tx)) | |
1860 | return false; | |
1861 | ||
1862 | if (sta) { | |
1863 | if (tx.sta) | |
1864 | *sta = &tx.sta->sta; | |
1865 | else | |
1866 | *sta = NULL; | |
1867 | } | |
1868 | ||
88724a81 JB |
1869 | /* this function isn't suitable for fragmented data frames */ |
1870 | skb2 = __skb_dequeue(&tx.skbs); | |
1871 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1872 | ieee80211_free_txskb(hw, skb2); | |
1873 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1874 | return false; | |
1875 | } | |
1876 | ||
06be6b14 FF |
1877 | return true; |
1878 | } | |
1879 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1880 | ||
7bb45683 JB |
1881 | /* |
1882 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1883 | */ | |
1884 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f | 1885 | struct sta_info *sta, struct sk_buff *skb, |
08aca29a | 1886 | bool txpending) |
e2ebc74d | 1887 | { |
3b8d81e0 | 1888 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1889 | struct ieee80211_tx_data tx; |
97b045d6 | 1890 | ieee80211_tx_result res_prepare; |
e039fa4a | 1891 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1892 | bool result = true; |
74e4dbfd | 1893 | int led_len; |
e2ebc74d | 1894 | |
e2ebc74d JB |
1895 | if (unlikely(skb->len < 10)) { |
1896 | dev_kfree_skb(skb); | |
7bb45683 | 1897 | return true; |
e2ebc74d JB |
1898 | } |
1899 | ||
58d4185e | 1900 | /* initialises tx */ |
74e4dbfd | 1901 | led_len = skb->len; |
7c10770f | 1902 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1903 | |
cd8ffc80 | 1904 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1905 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1906 | return true; |
cd8ffc80 | 1907 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1908 | return true; |
e2ebc74d JB |
1909 | } |
1910 | ||
3a25a8c8 JB |
1911 | /* set up hw_queue value early */ |
1912 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
30686bf7 | 1913 | !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
3a25a8c8 JB |
1914 | info->hw_queue = |
1915 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1916 | ||
bb42f2d1 | 1917 | if (invoke_tx_handlers_early(&tx)) |
6eae4a6c | 1918 | return true; |
bb42f2d1 THJ |
1919 | |
1920 | if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb)) | |
1921 | return true; | |
1922 | ||
1923 | if (!invoke_tx_handlers_late(&tx)) | |
74e4dbfd JB |
1924 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1925 | tx.sta, txpending); | |
55de908a | 1926 | |
7bb45683 | 1927 | return result; |
e2ebc74d JB |
1928 | } |
1929 | ||
1930 | /* device xmit handlers */ | |
1931 | ||
14f46c1e JB |
1932 | enum ieee80211_encrypt { |
1933 | ENCRYPT_NO, | |
1934 | ENCRYPT_MGMT, | |
1935 | ENCRYPT_DATA, | |
1936 | }; | |
1937 | ||
3bff1865 | 1938 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a | 1939 | struct sk_buff *skb, |
14f46c1e JB |
1940 | int head_need, |
1941 | enum ieee80211_encrypt encrypt) | |
23c0752a | 1942 | { |
3bff1865 | 1943 | struct ieee80211_local *local = sdata->local; |
9d0f50b8 | 1944 | bool enc_tailroom; |
23c0752a JB |
1945 | int tail_need = 0; |
1946 | ||
14f46c1e JB |
1947 | enc_tailroom = encrypt == ENCRYPT_MGMT || |
1948 | (encrypt == ENCRYPT_DATA && | |
1949 | sdata->crypto_tx_tailroom_needed_cnt); | |
9d0f50b8 FF |
1950 | |
1951 | if (enc_tailroom) { | |
23c0752a JB |
1952 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1953 | tail_need -= skb_tailroom(skb); | |
1954 | tail_need = max_t(int, tail_need, 0); | |
1955 | } | |
1956 | ||
c70f59a2 | 1957 | if (skb_cloned(skb) && |
30686bf7 | 1958 | (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) || |
9d0f50b8 | 1959 | !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom)) |
23c0752a | 1960 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1961 | else if (head_need || tail_need) |
23c0752a | 1962 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1963 | else |
1964 | return 0; | |
23c0752a JB |
1965 | |
1966 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1967 | wiphy_debug(local->hw.wiphy, |
1968 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1969 | return -ENOMEM; |
1970 | } | |
1971 | ||
23c0752a JB |
1972 | return 0; |
1973 | } | |
1974 | ||
7c10770f | 1975 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
08aca29a | 1976 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1977 | { |
3b8d81e0 | 1978 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1979 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
14f46c1e | 1980 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1981 | int headroom; |
14f46c1e | 1982 | enum ieee80211_encrypt encrypt; |
e2ebc74d | 1983 | |
14f46c1e JB |
1984 | if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT) |
1985 | encrypt = ENCRYPT_NO; | |
1986 | else if (ieee80211_is_mgmt(hdr->frame_control)) | |
1987 | encrypt = ENCRYPT_MGMT; | |
1988 | else | |
1989 | encrypt = ENCRYPT_DATA; | |
23c0752a | 1990 | |
3b8d81e0 | 1991 | headroom = local->tx_headroom; |
14f46c1e | 1992 | if (encrypt != ENCRYPT_NO) |
2475b1cc | 1993 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1994 | headroom -= skb_headroom(skb); |
1995 | headroom = max_t(int, 0, headroom); | |
1996 | ||
14f46c1e | 1997 | if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) { |
c3e7724b | 1998 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1999 | return; |
e2ebc74d JB |
2000 | } |
2001 | ||
14f46c1e | 2002 | /* reload after potential resize */ |
740c1aa3 | 2003 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 2004 | info->control.vif = &sdata->vif; |
e2ebc74d | 2005 | |
3f52b7e3 MP |
2006 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2007 | if (ieee80211_is_data(hdr->frame_control) && | |
2008 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 2009 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
2010 | return; /* skb queued: don't free */ |
2011 | } else { | |
2012 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
2013 | } | |
98aed9fd | 2014 | } |
cca89496 | 2015 | |
2154c81c | 2016 | ieee80211_set_qos_hdr(sdata, skb); |
08aca29a | 2017 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
2018 | } |
2019 | ||
cb17ed29 MV |
2020 | bool ieee80211_parse_tx_radiotap(struct sk_buff *skb, |
2021 | struct net_device *dev) | |
73b9f03a | 2022 | { |
cb17ed29 | 2023 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
73b9f03a JB |
2024 | struct ieee80211_radiotap_iterator iterator; |
2025 | struct ieee80211_radiotap_header *rthdr = | |
2026 | (struct ieee80211_radiotap_header *) skb->data; | |
2027 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
dfdfc2be SE |
2028 | struct ieee80211_supported_band *sband = |
2029 | local->hw.wiphy->bands[info->band]; | |
73b9f03a JB |
2030 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, |
2031 | NULL); | |
2032 | u16 txflags; | |
dfdfc2be SE |
2033 | u16 rate = 0; |
2034 | bool rate_found = false; | |
2035 | u8 rate_retries = 0; | |
2036 | u16 rate_flags = 0; | |
f66b60f6 | 2037 | u8 mcs_known, mcs_flags, mcs_bw; |
646e76bb LB |
2038 | u16 vht_known; |
2039 | u8 vht_mcs = 0, vht_nss = 0; | |
dfdfc2be | 2040 | int i; |
73b9f03a | 2041 | |
cb17ed29 MV |
2042 | /* check for not even having the fixed radiotap header part */ |
2043 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
2044 | return false; /* too short to be possibly valid */ | |
2045 | ||
2046 | /* is it a header version we can trust to find length from? */ | |
2047 | if (unlikely(rthdr->it_version)) | |
2048 | return false; /* only version 0 is supported */ | |
2049 | ||
2050 | /* does the skb contain enough to deliver on the alleged length? */ | |
2051 | if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data))) | |
2052 | return false; /* skb too short for claimed rt header extent */ | |
2053 | ||
73b9f03a JB |
2054 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | |
2055 | IEEE80211_TX_CTL_DONTFRAG; | |
2056 | ||
2057 | /* | |
2058 | * for every radiotap entry that is present | |
2059 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
2060 | * entries present, or -EINVAL on error) | |
2061 | */ | |
2062 | ||
2063 | while (!ret) { | |
2064 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
2065 | ||
2066 | if (ret) | |
2067 | continue; | |
2068 | ||
2069 | /* see if this argument is something we can use */ | |
2070 | switch (iterator.this_arg_index) { | |
2071 | /* | |
2072 | * You must take care when dereferencing iterator.this_arg | |
2073 | * for multibyte types... the pointer is not aligned. Use | |
2074 | * get_unaligned((type *)iterator.this_arg) to dereference | |
2075 | * iterator.this_arg for type "type" safely on all arches. | |
2076 | */ | |
2077 | case IEEE80211_RADIOTAP_FLAGS: | |
2078 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
2079 | /* | |
2080 | * this indicates that the skb we have been | |
2081 | * handed has the 32-bit FCS CRC at the end... | |
2082 | * we should react to that by snipping it off | |
2083 | * because it will be recomputed and added | |
2084 | * on transmission | |
2085 | */ | |
2086 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
2087 | return false; | |
2088 | ||
2089 | skb_trim(skb, skb->len - FCS_LEN); | |
2090 | } | |
2091 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
2092 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
2093 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
2094 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
2095 | break; | |
2096 | ||
2097 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
2098 | txflags = get_unaligned_le16(iterator.this_arg); | |
2099 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
2100 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
e02281e7 MV |
2101 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO) |
2102 | info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO; | |
30df8130 MV |
2103 | if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER) |
2104 | info->control.flags |= | |
2105 | IEEE80211_TX_CTRL_DONT_REORDER; | |
73b9f03a JB |
2106 | break; |
2107 | ||
dfdfc2be SE |
2108 | case IEEE80211_RADIOTAP_RATE: |
2109 | rate = *iterator.this_arg; | |
2110 | rate_flags = 0; | |
2111 | rate_found = true; | |
2112 | break; | |
2113 | ||
2114 | case IEEE80211_RADIOTAP_DATA_RETRIES: | |
2115 | rate_retries = *iterator.this_arg; | |
2116 | break; | |
2117 | ||
2118 | case IEEE80211_RADIOTAP_MCS: | |
2119 | mcs_known = iterator.this_arg[0]; | |
2120 | mcs_flags = iterator.this_arg[1]; | |
2121 | if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS)) | |
2122 | break; | |
2123 | ||
2124 | rate_found = true; | |
2125 | rate = iterator.this_arg[2]; | |
2126 | rate_flags = IEEE80211_TX_RC_MCS; | |
2127 | ||
2128 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI && | |
2129 | mcs_flags & IEEE80211_RADIOTAP_MCS_SGI) | |
2130 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2131 | ||
f66b60f6 | 2132 | mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK; |
dfdfc2be | 2133 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW && |
f66b60f6 | 2134 | mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40) |
dfdfc2be SE |
2135 | rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2136 | break; | |
2137 | ||
646e76bb LB |
2138 | case IEEE80211_RADIOTAP_VHT: |
2139 | vht_known = get_unaligned_le16(iterator.this_arg); | |
2140 | rate_found = true; | |
2141 | ||
2142 | rate_flags = IEEE80211_TX_RC_VHT_MCS; | |
2143 | if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) && | |
2144 | (iterator.this_arg[2] & | |
2145 | IEEE80211_RADIOTAP_VHT_FLAG_SGI)) | |
2146 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2147 | if (vht_known & | |
2148 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) { | |
2149 | if (iterator.this_arg[3] == 1) | |
2150 | rate_flags |= | |
2151 | IEEE80211_TX_RC_40_MHZ_WIDTH; | |
2152 | else if (iterator.this_arg[3] == 4) | |
2153 | rate_flags |= | |
2154 | IEEE80211_TX_RC_80_MHZ_WIDTH; | |
2155 | else if (iterator.this_arg[3] == 11) | |
2156 | rate_flags |= | |
2157 | IEEE80211_TX_RC_160_MHZ_WIDTH; | |
2158 | } | |
2159 | ||
2160 | vht_mcs = iterator.this_arg[4] >> 4; | |
2161 | vht_nss = iterator.this_arg[4] & 0xF; | |
2162 | break; | |
2163 | ||
73b9f03a JB |
2164 | /* |
2165 | * Please update the file | |
429ff87b | 2166 | * Documentation/networking/mac80211-injection.rst |
73b9f03a JB |
2167 | * when parsing new fields here. |
2168 | */ | |
2169 | ||
2170 | default: | |
2171 | break; | |
2172 | } | |
2173 | } | |
2174 | ||
2175 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
2176 | return false; | |
2177 | ||
dfdfc2be SE |
2178 | if (rate_found) { |
2179 | info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT; | |
2180 | ||
2181 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
2182 | info->control.rates[i].idx = -1; | |
2183 | info->control.rates[i].flags = 0; | |
2184 | info->control.rates[i].count = 0; | |
2185 | } | |
2186 | ||
2187 | if (rate_flags & IEEE80211_TX_RC_MCS) { | |
2188 | info->control.rates[0].idx = rate; | |
646e76bb LB |
2189 | } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) { |
2190 | ieee80211_rate_set_vht(info->control.rates, vht_mcs, | |
2191 | vht_nss); | |
dfdfc2be SE |
2192 | } else { |
2193 | for (i = 0; i < sband->n_bitrates; i++) { | |
2194 | if (rate * 5 != sband->bitrates[i].bitrate) | |
2195 | continue; | |
2196 | ||
2197 | info->control.rates[0].idx = i; | |
2198 | break; | |
2199 | } | |
2200 | } | |
2201 | ||
07310a63 FF |
2202 | if (info->control.rates[0].idx < 0) |
2203 | info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT; | |
2204 | ||
dfdfc2be SE |
2205 | info->control.rates[0].flags = rate_flags; |
2206 | info->control.rates[0].count = min_t(u8, rate_retries + 1, | |
2207 | local->hw.max_rate_tries); | |
2208 | } | |
2209 | ||
73b9f03a JB |
2210 | return true; |
2211 | } | |
2212 | ||
d0cf9c0d SH |
2213 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
2214 | struct net_device *dev) | |
e2ebc74d JB |
2215 | { |
2216 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 2217 | struct ieee80211_chanctx_conf *chanctx_conf; |
3b8d81e0 | 2218 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 2219 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 2220 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 2221 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 2222 | u16 len_rthdr; |
5d9cf4a5 | 2223 | int hdrlen; |
e2ebc74d | 2224 | |
cb17ed29 MV |
2225 | memset(info, 0, sizeof(*info)); |
2226 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | | |
2227 | IEEE80211_TX_CTL_INJECTED; | |
9b8a74e3 | 2228 | |
cb17ed29 MV |
2229 | /* Sanity-check and process the injection radiotap header */ |
2230 | if (!ieee80211_parse_tx_radiotap(skb, dev)) | |
2231 | goto fail; | |
9b8a74e3 | 2232 | |
cb17ed29 | 2233 | /* we now know there is a radiotap header with a length we can use */ |
9b8a74e3 AG |
2234 | len_rthdr = ieee80211_get_radiotap_len(skb->data); |
2235 | ||
e2ebc74d JB |
2236 | /* |
2237 | * fix up the pointers accounting for the radiotap | |
2238 | * header still being in there. We are being given | |
2239 | * a precooked IEEE80211 header so no need for | |
2240 | * normal processing | |
2241 | */ | |
9b8a74e3 | 2242 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 2243 | /* |
9b8a74e3 AG |
2244 | * these are just fixed to the end of the rt area since we |
2245 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 2246 | */ |
9b8a74e3 AG |
2247 | skb_set_network_header(skb, len_rthdr); |
2248 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 2249 | |
5d9cf4a5 JB |
2250 | if (skb->len < len_rthdr + 2) |
2251 | goto fail; | |
2252 | ||
2253 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
2254 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
2255 | ||
2256 | if (skb->len < len_rthdr + hdrlen) | |
2257 | goto fail; | |
2258 | ||
f75f5c6f HS |
2259 | /* |
2260 | * Initialize skb->protocol if the injected frame is a data frame | |
2261 | * carrying a rfc1042 header | |
2262 | */ | |
5d9cf4a5 JB |
2263 | if (ieee80211_is_data(hdr->frame_control) && |
2264 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
2265 | u8 *payload = (u8 *)hdr + hdrlen; | |
2266 | ||
b203ca39 | 2267 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
2268 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
2269 | payload[7]); | |
f75f5c6f HS |
2270 | } |
2271 | ||
70c5e40c MV |
2272 | /* Initialize skb->priority for QoS frames. If the DONT_REORDER flag |
2273 | * is set, stick to the default value for skb->priority to assure | |
2274 | * frames injected with this flag are not reordered relative to each | |
2275 | * other. | |
753ffad3 | 2276 | */ |
70c5e40c MV |
2277 | if (ieee80211_is_data_qos(hdr->frame_control) && |
2278 | !(info->control.flags & IEEE80211_TX_CTRL_DONT_REORDER)) { | |
753ffad3 FO |
2279 | u8 *p = ieee80211_get_qos_ctl(hdr); |
2280 | skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK; | |
2281 | } | |
2282 | ||
5d9cf4a5 JB |
2283 | rcu_read_lock(); |
2284 | ||
2285 | /* | |
2286 | * We process outgoing injected frames that have a local address | |
2287 | * we handle as though they are non-injected frames. | |
2288 | * This code here isn't entirely correct, the local MAC address | |
2289 | * isn't always enough to find the interface to use; for proper | |
70d9c599 | 2290 | * VLAN support we have an nl80211-based mechanism. |
b226a826 JB |
2291 | * |
2292 | * This is necessary, for example, for old hostapd versions that | |
2293 | * don't use nl80211-based management TX/RX. | |
5d9cf4a5 JB |
2294 | */ |
2295 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2296 | ||
2297 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
2298 | if (!ieee80211_sdata_running(tmp_sdata)) | |
2299 | continue; | |
2300 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
70d9c599 | 2301 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
5d9cf4a5 | 2302 | continue; |
b203ca39 | 2303 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
2304 | sdata = tmp_sdata; |
2305 | break; | |
2306 | } | |
2307 | } | |
7351c6bd | 2308 | |
55de908a JB |
2309 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2310 | if (!chanctx_conf) { | |
2311 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
2312 | if (tmp_sdata) | |
2313 | chanctx_conf = | |
2314 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
2315 | } | |
55de908a | 2316 | |
b4a7ff75 | 2317 | if (chanctx_conf) |
b4932836 | 2318 | chandef = &chanctx_conf->def; |
b4a7ff75 | 2319 | else if (!local->use_chanctx) |
b4932836 | 2320 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
2321 | else |
2322 | goto fail_rcu; | |
55de908a JB |
2323 | |
2324 | /* | |
2325 | * Frame injection is not allowed if beaconing is not allowed | |
2326 | * or if we need radar detection. Beaconing is usually not allowed when | |
2327 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
2328 | * Passive scan is also used in world regulatory domains where | |
2329 | * your country is not known and as such it should be treated as | |
2330 | * NO TX unless the channel is explicitly allowed in which case | |
2331 | * your current regulatory domain would not have the passive scan | |
2332 | * flag. | |
2333 | * | |
2334 | * Since AP mode uses monitor interfaces to inject/TX management | |
2335 | * frames we can make AP mode the exception to this rule once it | |
2336 | * supports radar detection as its implementation can deal with | |
2337 | * radar detection by itself. We can do that later by adding a | |
2338 | * monitor flag interfaces used for AP support. | |
2339 | */ | |
b4932836 JD |
2340 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
2341 | sdata->vif.type)) | |
55de908a JB |
2342 | goto fail_rcu; |
2343 | ||
73c4e195 | 2344 | info->band = chandef->chan->band; |
109843b0 | 2345 | |
cb17ed29 MV |
2346 | /* remove the injection radiotap header */ |
2347 | skb_pull(skb, len_rthdr); | |
109843b0 | 2348 | |
08aca29a | 2349 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
2350 | rcu_read_unlock(); |
2351 | ||
e2ebc74d | 2352 | return NETDEV_TX_OK; |
9b8a74e3 | 2353 | |
55de908a JB |
2354 | fail_rcu: |
2355 | rcu_read_unlock(); | |
9b8a74e3 AG |
2356 | fail: |
2357 | dev_kfree_skb(skb); | |
2358 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
2359 | } |
2360 | ||
97ffe757 | 2361 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 2362 | { |
97ffe757 | 2363 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 2364 | |
97ffe757 JB |
2365 | return ethertype == ETH_P_TDLS && |
2366 | skb->len > 14 && | |
2367 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
2368 | } | |
2369 | ||
50ff477a JC |
2370 | int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, |
2371 | struct sk_buff *skb, | |
2372 | struct sta_info **sta_out) | |
97ffe757 JB |
2373 | { |
2374 | struct sta_info *sta; | |
2375 | ||
2376 | switch (sdata->vif.type) { | |
2377 | case NL80211_IFTYPE_AP_VLAN: | |
2378 | sta = rcu_dereference(sdata->u.vlan.sta); | |
2379 | if (sta) { | |
2380 | *sta_out = sta; | |
2381 | return 0; | |
2382 | } else if (sdata->wdev.use_4addr) { | |
2383 | return -ENOLINK; | |
2384 | } | |
fc0561dc | 2385 | fallthrough; |
97ffe757 JB |
2386 | case NL80211_IFTYPE_AP: |
2387 | case NL80211_IFTYPE_OCB: | |
2388 | case NL80211_IFTYPE_ADHOC: | |
2389 | if (is_multicast_ether_addr(skb->data)) { | |
2390 | *sta_out = ERR_PTR(-ENOENT); | |
2391 | return 0; | |
2392 | } | |
2393 | sta = sta_info_get_bss(sdata, skb->data); | |
2394 | break; | |
97ffe757 JB |
2395 | #ifdef CONFIG_MAC80211_MESH |
2396 | case NL80211_IFTYPE_MESH_POINT: | |
2397 | /* determined much later */ | |
2398 | *sta_out = NULL; | |
2399 | return 0; | |
2400 | #endif | |
2401 | case NL80211_IFTYPE_STATION: | |
2402 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
2403 | sta = sta_info_get(sdata, skb->data); | |
11d62caf JB |
2404 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { |
2405 | if (test_sta_flag(sta, | |
2406 | WLAN_STA_TDLS_PEER_AUTH)) { | |
97ffe757 JB |
2407 | *sta_out = sta; |
2408 | return 0; | |
2409 | } | |
2410 | ||
2411 | /* | |
2412 | * TDLS link during setup - throw out frames to | |
2413 | * peer. Allow TDLS-setup frames to unauthorized | |
2414 | * peers for the special case of a link teardown | |
2415 | * after a TDLS sta is removed due to being | |
2416 | * unreachable. | |
2417 | */ | |
11d62caf | 2418 | if (!ieee80211_is_tdls_setup(skb)) |
97ffe757 JB |
2419 | return -EINVAL; |
2420 | } | |
2421 | ||
2422 | } | |
2423 | ||
2424 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
2425 | if (!sta) | |
2426 | return -ENOLINK; | |
2427 | break; | |
2428 | default: | |
2429 | return -EINVAL; | |
2430 | } | |
2431 | ||
2432 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
2433 | return 0; | |
ad38bfc9 MG |
2434 | } |
2435 | ||
a7528198 | 2436 | static u16 ieee80211_store_ack_skb(struct ieee80211_local *local, |
5d8983c8 | 2437 | struct sk_buff *skb, |
a7528198 MT |
2438 | u32 *info_flags, |
2439 | u64 *cookie) | |
5d8983c8 | 2440 | { |
a7528198 | 2441 | struct sk_buff *ack_skb; |
5d8983c8 JC |
2442 | u16 info_id = 0; |
2443 | ||
a7528198 MT |
2444 | if (skb->sk) |
2445 | ack_skb = skb_clone_sk(skb); | |
2446 | else | |
2447 | ack_skb = skb_clone(skb, GFP_ATOMIC); | |
2448 | ||
5d8983c8 JC |
2449 | if (ack_skb) { |
2450 | unsigned long flags; | |
2451 | int id; | |
2452 | ||
2453 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
2454 | id = idr_alloc(&local->ack_status_frames, ack_skb, | |
f2b18bac | 2455 | 1, 0x2000, GFP_ATOMIC); |
5d8983c8 JC |
2456 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2457 | ||
2458 | if (id >= 0) { | |
2459 | info_id = id; | |
2460 | *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a7528198 MT |
2461 | if (cookie) { |
2462 | *cookie = ieee80211_mgmt_tx_cookie(local); | |
2463 | IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie; | |
2464 | } | |
5d8983c8 JC |
2465 | } else { |
2466 | kfree_skb(ack_skb); | |
2467 | } | |
2468 | } | |
2469 | ||
2470 | return info_id; | |
2471 | } | |
2472 | ||
e2ebc74d | 2473 | /** |
4c9451ed JB |
2474 | * ieee80211_build_hdr - build 802.11 header in the given frame |
2475 | * @sdata: virtual interface to build the header for | |
2476 | * @skb: the skb to build the header in | |
24d342c5 | 2477 | * @info_flags: skb flags to set |
f0daf54f | 2478 | * @sta: the station pointer |
06016772 | 2479 | * @ctrl_flags: info control flags to set |
f0daf54f | 2480 | * @cookie: cookie pointer to fill (if not %NULL) |
e2ebc74d | 2481 | * |
4c9451ed JB |
2482 | * This function takes the skb with 802.3 header and reformats the header to |
2483 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
2484 | * being transmitted on. | |
2485 | * | |
2486 | * Note that this function also takes care of the TX status request and | |
2487 | * potential unsharing of the SKB - this needs to be interleaved with the | |
2488 | * header building. | |
e2ebc74d | 2489 | * |
4c9451ed JB |
2490 | * The function requires the read-side RCU lock held |
2491 | * | |
2492 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 2493 | */ |
4c9451ed | 2494 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 2495 | struct sk_buff *skb, u32 info_flags, |
a7528198 MT |
2496 | struct sta_info *sta, u32 ctrl_flags, |
2497 | u64 *cookie) | |
e2ebc74d | 2498 | { |
133b8226 | 2499 | struct ieee80211_local *local = sdata->local; |
489ee919 | 2500 | struct ieee80211_tx_info *info; |
dcf33963 | 2501 | int head_need; |
065e9605 HH |
2502 | u16 ethertype, hdrlen, meshhdrlen = 0; |
2503 | __le16 fc; | |
e2ebc74d | 2504 | struct ieee80211_hdr hdr; |
ff67bb86 | 2505 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 2506 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
2507 | const u8 *encaps_data; |
2508 | int encaps_len, skip_header_bytes; | |
97ffe757 JB |
2509 | bool wme_sta = false, authorized = false; |
2510 | bool tdls_peer; | |
a729cff8 | 2511 | bool multicast; |
a729cff8 | 2512 | u16 info_id = 0; |
55de908a JB |
2513 | struct ieee80211_chanctx_conf *chanctx_conf; |
2514 | struct ieee80211_sub_if_data *ap_sdata; | |
57fbcce3 | 2515 | enum nl80211_band band; |
4c9451ed | 2516 | int ret; |
e2ebc74d | 2517 | |
97ffe757 JB |
2518 | if (IS_ERR(sta)) |
2519 | sta = NULL; | |
2520 | ||
276d9e82 JN |
2521 | #ifdef CONFIG_MAC80211_DEBUGFS |
2522 | if (local->force_tx_status) | |
2523 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2524 | #endif | |
2525 | ||
e2ebc74d JB |
2526 | /* convert Ethernet header to proper 802.11 header (based on |
2527 | * operation mode) */ | |
2528 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 2529 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 2530 | |
51fb61e7 | 2531 | switch (sdata->vif.type) { |
05c914fe | 2532 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 2533 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
2534 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
2535 | /* RA TA DA SA */ | |
2536 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 2537 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2538 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2539 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2540 | hdrlen = 30; | |
c2c98fde | 2541 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 2542 | wme_sta = sta->sta.wme; |
f14543ee | 2543 | } |
55de908a JB |
2544 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
2545 | u.ap); | |
2546 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
2547 | if (!chanctx_conf) { |
2548 | ret = -ENOTCONN; | |
2549 | goto free; | |
2550 | } | |
4bf88530 | 2551 | band = chanctx_conf->def.chan->band; |
97ffe757 | 2552 | if (sdata->wdev.use_4addr) |
f14543ee | 2553 | break; |
fc0561dc | 2554 | fallthrough; |
f14543ee | 2555 | case NL80211_IFTYPE_AP: |
fe80123d AB |
2556 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
2557 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2558 | if (!chanctx_conf) { |
2559 | ret = -ENOTCONN; | |
2560 | goto free; | |
2561 | } | |
065e9605 | 2562 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
2563 | /* DA BSSID SA */ |
2564 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 2565 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2566 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
2567 | hdrlen = 24; | |
4bf88530 | 2568 | band = chanctx_conf->def.chan->band; |
cf966838 | 2569 | break; |
33b64eb2 | 2570 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 2571 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 2572 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
2573 | struct sta_info *next_hop; |
2574 | bool mpp_lookup = true; | |
2575 | ||
bf7cd94d | 2576 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
2577 | if (mpath) { |
2578 | mpp_lookup = false; | |
2579 | next_hop = rcu_dereference(mpath->next_hop); | |
2580 | if (!next_hop || | |
2581 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
2582 | MESH_PATH_RESOLVING))) | |
2583 | mpp_lookup = true; | |
2584 | } | |
2585 | ||
ab1c7906 | 2586 | if (mpp_lookup) { |
bf7cd94d | 2587 | mppath = mpp_path_lookup(sdata, skb->data); |
ab1c7906 HR |
2588 | if (mppath) |
2589 | mppath->exp_time = jiffies; | |
2590 | } | |
163df6cf CYY |
2591 | |
2592 | if (mppath && mpath) | |
2bdaf386 | 2593 | mesh_path_del(sdata, mpath->dst); |
b8bacc18 | 2594 | } |
79617dee | 2595 | |
f76b57b4 | 2596 | /* |
9d52501b JF |
2597 | * Use address extension if it is a packet from |
2598 | * another interface or if we know the destination | |
2599 | * is being proxied by a portal (i.e. portal address | |
2600 | * differs from proxied address) | |
f76b57b4 | 2601 | */ |
b203ca39 JP |
2602 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2603 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2604 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2605 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2606 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2607 | NULL, NULL); | |
79617dee | 2608 | } else { |
27f01124 TP |
2609 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2610 | * For unicast with unknown forwarding information, | |
2611 | * destination might be in the MBSS or if that fails | |
2612 | * forwarded to another mesh gate. In either case | |
2613 | * resolution will be handled in ieee80211_xmit(), so | |
2614 | * leave the original DA. This also works for mcast */ | |
2615 | const u8 *mesh_da = skb->data; | |
2616 | ||
2617 | if (mppath) | |
2618 | mesh_da = mppath->mpp; | |
2619 | else if (mpath) | |
2620 | mesh_da = mpath->dst; | |
79617dee | 2621 | |
3c5772a5 | 2622 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2623 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2624 | if (is_multicast_ether_addr(mesh_da)) |
2625 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2626 | meshhdrlen = ieee80211_new_mesh_header( |
2627 | sdata, &mesh_hdr, | |
2628 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2629 | else |
27f01124 | 2630 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2631 | meshhdrlen = ieee80211_new_mesh_header( |
2632 | sdata, &mesh_hdr, skb->data, | |
2633 | skb->data + ETH_ALEN); | |
79617dee | 2634 | |
79617dee | 2635 | } |
55de908a | 2636 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2637 | if (!chanctx_conf) { |
2638 | ret = -ENOTCONN; | |
2639 | goto free; | |
2640 | } | |
4bf88530 | 2641 | band = chanctx_conf->def.chan->band; |
8828f81a RM |
2642 | |
2643 | /* For injected frames, fill RA right away as nexthop lookup | |
2644 | * will be skipped. | |
2645 | */ | |
2646 | if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) && | |
2647 | is_zero_ether_addr(hdr.addr1)) | |
2648 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
33b64eb2 LCC |
2649 | break; |
2650 | #endif | |
05c914fe | 2651 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2652 | /* we already did checks when looking up the RA STA */ |
2653 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2654 | |
97ffe757 | 2655 | if (tdls_peer) { |
941c93cd AN |
2656 | /* DA SA BSSID */ |
2657 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2658 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2659 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2660 | hdrlen = 24; | |
2661 | } else if (sdata->u.mgd.use_4addr && | |
2662 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2663 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2664 | IEEE80211_FCTL_TODS); | |
f14543ee | 2665 | /* RA TA DA SA */ |
941c93cd | 2666 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2667 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2668 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2669 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2670 | hdrlen = 30; | |
2671 | } else { | |
2672 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2673 | /* BSSID SA DA */ | |
941c93cd | 2674 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2675 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2676 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2677 | hdrlen = 24; | |
2678 | } | |
55de908a | 2679 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2680 | if (!chanctx_conf) { |
2681 | ret = -ENOTCONN; | |
2682 | goto free; | |
2683 | } | |
4bf88530 | 2684 | band = chanctx_conf->def.chan->band; |
cf966838 | 2685 | break; |
239281f8 RL |
2686 | case NL80211_IFTYPE_OCB: |
2687 | /* DA SA BSSID */ | |
2688 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2689 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2690 | eth_broadcast_addr(hdr.addr3); | |
2691 | hdrlen = 24; | |
2692 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2693 | if (!chanctx_conf) { |
2694 | ret = -ENOTCONN; | |
2695 | goto free; | |
2696 | } | |
239281f8 RL |
2697 | band = chanctx_conf->def.chan->band; |
2698 | break; | |
05c914fe | 2699 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2700 | /* DA SA BSSID */ |
2701 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2702 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2703 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2704 | hdrlen = 24; |
55de908a | 2705 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2706 | if (!chanctx_conf) { |
2707 | ret = -ENOTCONN; | |
2708 | goto free; | |
2709 | } | |
4bf88530 | 2710 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2711 | break; |
2712 | default: | |
4c9451ed JB |
2713 | ret = -EINVAL; |
2714 | goto free; | |
e2ebc74d JB |
2715 | } |
2716 | ||
a729cff8 | 2717 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2718 | |
97ffe757 JB |
2719 | /* sta is always NULL for mesh */ |
2720 | if (sta) { | |
2721 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2722 | wme_sta = sta->sta.wme; | |
2723 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2724 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2725 | wme_sta = true; |
97ffe757 | 2726 | } |
4777be41 | 2727 | |
527871d7 JB |
2728 | /* receiver does QoS (which also means we do) use it */ |
2729 | if (wme_sta) { | |
065e9605 | 2730 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2731 | hdrlen += 2; |
2732 | } | |
2733 | ||
2734 | /* | |
238814fd JB |
2735 | * Drop unicast frames to unauthorised stations unless they are |
2736 | * EAPOL frames from the local station. | |
ce3edf6d | 2737 | */ |
55182e4a | 2738 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2739 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2740 | !multicast && !authorized && |
55182e4a | 2741 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2742 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2743 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2744 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2745 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2746 | #endif |
2747 | ||
2748 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2749 | ||
4c9451ed JB |
2750 | ret = -EPERM; |
2751 | goto free; | |
ce3edf6d JB |
2752 | } |
2753 | ||
a7528198 MT |
2754 | if (unlikely(!multicast && ((skb->sk && |
2755 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) || | |
2756 | ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS))) | |
2757 | info_id = ieee80211_store_ack_skb(local, skb, &info_flags, | |
2758 | cookie); | |
a729cff8 | 2759 | |
7e244707 HS |
2760 | /* |
2761 | * If the skb is shared we need to obtain our own copy. | |
2762 | */ | |
2763 | if (skb_shared(skb)) { | |
a729cff8 JB |
2764 | struct sk_buff *tmp_skb = skb; |
2765 | ||
2766 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2767 | WARN_ON(info_id); | |
2768 | ||
f8a0a781 | 2769 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2770 | kfree_skb(tmp_skb); |
2771 | ||
4c9451ed JB |
2772 | if (!skb) { |
2773 | ret = -ENOMEM; | |
2774 | goto free; | |
2775 | } | |
7e244707 HS |
2776 | } |
2777 | ||
065e9605 | 2778 | hdr.frame_control = fc; |
e2ebc74d JB |
2779 | hdr.duration_id = 0; |
2780 | hdr.seq_ctrl = 0; | |
2781 | ||
2782 | skip_header_bytes = ETH_HLEN; | |
2783 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2784 | encaps_data = bridge_tunnel_header; | |
2785 | encaps_len = sizeof(bridge_tunnel_header); | |
2786 | skip_header_bytes -= 2; | |
e5c5d22e | 2787 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2788 | encaps_data = rfc1042_header; |
2789 | encaps_len = sizeof(rfc1042_header); | |
2790 | skip_header_bytes -= 2; | |
2791 | } else { | |
2792 | encaps_data = NULL; | |
2793 | encaps_len = 0; | |
2794 | } | |
2795 | ||
2796 | skb_pull(skb, skip_header_bytes); | |
23c0752a | 2797 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2798 | |
23c0752a JB |
2799 | /* |
2800 | * So we need to modify the skb header and hence need a copy of | |
2801 | * that. The head_need variable above doesn't, so far, include | |
2802 | * the needed header space that we don't need right away. If we | |
2803 | * can, then we don't reallocate right now but only after the | |
2804 | * frame arrives at the master device (if it does...) | |
2805 | * | |
2806 | * If we cannot, however, then we will reallocate to include all | |
2807 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2808 | * make it big enough for everything we may ever need. | |
2809 | */ | |
e2ebc74d | 2810 | |
3a5be7d4 | 2811 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2812 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2813 | head_need += local->tx_headroom; |
2814 | head_need = max_t(int, 0, head_need); | |
14f46c1e | 2815 | if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) { |
c3e7724b | 2816 | ieee80211_free_txskb(&local->hw, skb); |
1c963bec | 2817 | skb = NULL; |
4c9451ed | 2818 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2819 | } |
e2ebc74d JB |
2820 | } |
2821 | ||
eae4430e | 2822 | if (encaps_data) |
e2ebc74d | 2823 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
c29b9b9b | 2824 | |
e4ab7eb0 | 2825 | #ifdef CONFIG_MAC80211_MESH |
eae4430e | 2826 | if (meshhdrlen > 0) |
33b64eb2 | 2827 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); |
e4ab7eb0 | 2828 | #endif |
33b64eb2 | 2829 | |
065e9605 | 2830 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2831 | __le16 *qos_control; |
2832 | ||
d58ff351 | 2833 | qos_control = skb_push(skb, 2); |
c29b9b9b JB |
2834 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2835 | /* | |
2836 | * Maybe we could actually set some fields here, for now just | |
2837 | * initialise to zero to indicate no special operation. | |
2838 | */ | |
2839 | *qos_control = 0; | |
2840 | } else | |
2841 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2842 | ||
d57a544d | 2843 | skb_reset_mac_header(skb); |
e2ebc74d | 2844 | |
489ee919 | 2845 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2846 | memset(info, 0, sizeof(*info)); |
2847 | ||
a729cff8 JB |
2848 | info->flags = info_flags; |
2849 | info->ack_frame_id = info_id; | |
73c4e195 | 2850 | info->band = band; |
06016772 | 2851 | info->control.flags = ctrl_flags; |
a729cff8 | 2852 | |
4c9451ed JB |
2853 | return skb; |
2854 | free: | |
2855 | kfree_skb(skb); | |
2856 | return ERR_PTR(ret); | |
2857 | } | |
2858 | ||
17c18bf8 JB |
2859 | /* |
2860 | * fast-xmit overview | |
2861 | * | |
2862 | * The core idea of this fast-xmit is to remove per-packet checks by checking | |
2863 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band | |
2864 | * checks that are needed to get the sta->fast_tx pointer assigned, after which | |
2865 | * much less work can be done per packet. For example, fragmentation must be | |
2866 | * disabled or the fast_tx pointer will not be set. All the conditions are seen | |
2867 | * in the code here. | |
2868 | * | |
2869 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 | |
2870 | * header and other data to aid packet processing in ieee80211_xmit_fast(). | |
2871 | * | |
2872 | * The most difficult part of this is that when any of these assumptions | |
2873 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), | |
2874 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, | |
2875 | * since the per-packet code no longer checks the conditions. This is reflected | |
2876 | * by the calls to these functions throughout the rest of the code, and must be | |
2877 | * maintained if any of the TX path checks change. | |
2878 | */ | |
2879 | ||
2880 | void ieee80211_check_fast_xmit(struct sta_info *sta) | |
2881 | { | |
2882 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; | |
2883 | struct ieee80211_local *local = sta->local; | |
2884 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2885 | struct ieee80211_hdr *hdr = (void *)build.hdr; | |
2886 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2887 | __le16 fc; | |
2888 | ||
30686bf7 | 2889 | if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT)) |
17c18bf8 JB |
2890 | return; |
2891 | ||
2892 | /* Locking here protects both the pointer itself, and against concurrent | |
2893 | * invocations winning data access races to, e.g., the key pointer that | |
2894 | * is used. | |
2895 | * Without it, the invocation of this function right after the key | |
2896 | * pointer changes wouldn't be sufficient, as another CPU could access | |
2897 | * the pointer, then stall, and then do the cache update after the CPU | |
2898 | * that invalidated the key. | |
2899 | * With the locking, such scenarios cannot happen as the check for the | |
2900 | * key and the fast-tx assignment are done atomically, so the CPU that | |
2901 | * modifies the key will either wait or other one will see the key | |
2902 | * cleared/changed already. | |
2903 | */ | |
2904 | spin_lock_bh(&sta->lock); | |
30686bf7 JB |
2905 | if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) && |
2906 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) && | |
17c18bf8 JB |
2907 | sdata->vif.type == NL80211_IFTYPE_STATION) |
2908 | goto out; | |
2909 | ||
2910 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2911 | goto out; | |
2912 | ||
2913 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
2914 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
f7418bc1 FF |
2915 | test_sta_flag(sta, WLAN_STA_PS_DELIVER) || |
2916 | test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT)) | |
17c18bf8 JB |
2917 | goto out; |
2918 | ||
2919 | if (sdata->noack_map) | |
2920 | goto out; | |
2921 | ||
2922 | /* fast-xmit doesn't handle fragmentation at all */ | |
725b812c | 2923 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
f3fe4e93 | 2924 | !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG)) |
17c18bf8 JB |
2925 | goto out; |
2926 | ||
2927 | rcu_read_lock(); | |
2928 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2929 | if (!chanctx_conf) { | |
2930 | rcu_read_unlock(); | |
2931 | goto out; | |
2932 | } | |
2933 | build.band = chanctx_conf->def.chan->band; | |
2934 | rcu_read_unlock(); | |
2935 | ||
2936 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
2937 | ||
2938 | switch (sdata->vif.type) { | |
3ffd8840 JB |
2939 | case NL80211_IFTYPE_ADHOC: |
2940 | /* DA SA BSSID */ | |
2941 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2942 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2943 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); | |
2944 | build.hdr_len = 24; | |
2945 | break; | |
17c18bf8 JB |
2946 | case NL80211_IFTYPE_STATION: |
2947 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { | |
2948 | /* DA SA BSSID */ | |
2949 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2950 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2951 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2952 | build.hdr_len = 24; | |
2953 | break; | |
2954 | } | |
2955 | ||
2956 | if (sdata->u.mgd.use_4addr) { | |
2957 | /* non-regular ethertype cannot use the fastpath */ | |
2958 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2959 | IEEE80211_FCTL_TODS); | |
2960 | /* RA TA DA SA */ | |
2961 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2962 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2963 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2964 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2965 | build.hdr_len = 30; | |
2966 | break; | |
2967 | } | |
2968 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2969 | /* BSSID SA DA */ | |
2970 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2971 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2972 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2973 | build.hdr_len = 24; | |
2974 | break; | |
2975 | case NL80211_IFTYPE_AP_VLAN: | |
2976 | if (sdata->wdev.use_4addr) { | |
2977 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2978 | IEEE80211_FCTL_TODS); | |
2979 | /* RA TA DA SA */ | |
2980 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); | |
2981 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2982 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2983 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2984 | build.hdr_len = 30; | |
2985 | break; | |
2986 | } | |
fc0561dc | 2987 | fallthrough; |
17c18bf8 JB |
2988 | case NL80211_IFTYPE_AP: |
2989 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
2990 | /* DA BSSID SA */ | |
2991 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2992 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2993 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
2994 | build.hdr_len = 24; | |
2995 | break; | |
2996 | default: | |
2997 | /* not handled on fast-xmit */ | |
2998 | goto out; | |
2999 | } | |
3000 | ||
3001 | if (sta->sta.wme) { | |
3002 | build.hdr_len += 2; | |
3003 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
3004 | } | |
3005 | ||
3006 | /* We store the key here so there's no point in using rcu_dereference() | |
3007 | * but that's fine because the code that changes the pointers will call | |
3008 | * this function after doing so. For a single CPU that would be enough, | |
3009 | * for multiple see the comment above. | |
3010 | */ | |
3011 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); | |
3012 | if (!build.key) | |
3013 | build.key = rcu_access_pointer(sdata->default_unicast_key); | |
3014 | if (build.key) { | |
e495c247 | 3015 | bool gen_iv, iv_spc, mmic; |
17c18bf8 JB |
3016 | |
3017 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; | |
3018 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; | |
9de18d81 DS |
3019 | mmic = build.key->conf.flags & |
3020 | (IEEE80211_KEY_FLAG_GENERATE_MMIC | | |
3021 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE); | |
17c18bf8 JB |
3022 | |
3023 | /* don't handle software crypto */ | |
3024 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
3025 | goto out; | |
3026 | ||
62872a9b AW |
3027 | /* Key is being removed */ |
3028 | if (build.key->flags & KEY_FLAG_TAINTED) | |
3029 | goto out; | |
3030 | ||
17c18bf8 JB |
3031 | switch (build.key->conf.cipher) { |
3032 | case WLAN_CIPHER_SUITE_CCMP: | |
3033 | case WLAN_CIPHER_SUITE_CCMP_256: | |
96fc6efb | 3034 | if (gen_iv) |
17c18bf8 | 3035 | build.pn_offs = build.hdr_len; |
17c18bf8 JB |
3036 | if (gen_iv || iv_spc) |
3037 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; | |
3038 | break; | |
3039 | case WLAN_CIPHER_SUITE_GCMP: | |
3040 | case WLAN_CIPHER_SUITE_GCMP_256: | |
96fc6efb | 3041 | if (gen_iv) |
17c18bf8 | 3042 | build.pn_offs = build.hdr_len; |
17c18bf8 JB |
3043 | if (gen_iv || iv_spc) |
3044 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; | |
3045 | break; | |
e495c247 JB |
3046 | case WLAN_CIPHER_SUITE_TKIP: |
3047 | /* cannot handle MMIC or IV generation in xmit-fast */ | |
3048 | if (mmic || gen_iv) | |
3049 | goto out; | |
3050 | if (iv_spc) | |
3051 | build.hdr_len += IEEE80211_TKIP_IV_LEN; | |
3052 | break; | |
3053 | case WLAN_CIPHER_SUITE_WEP40: | |
3054 | case WLAN_CIPHER_SUITE_WEP104: | |
3055 | /* cannot handle IV generation in fast-xmit */ | |
3056 | if (gen_iv) | |
3057 | goto out; | |
3058 | if (iv_spc) | |
3059 | build.hdr_len += IEEE80211_WEP_IV_LEN; | |
3060 | break; | |
3061 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
3062 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
3063 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
3064 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3065 | WARN(1, | |
3066 | "management cipher suite 0x%x enabled for data\n", | |
3067 | build.key->conf.cipher); | |
17c18bf8 | 3068 | goto out; |
e495c247 JB |
3069 | default: |
3070 | /* we don't know how to generate IVs for this at all */ | |
3071 | if (WARN_ON(gen_iv)) | |
3072 | goto out; | |
3073 | /* pure hardware keys are OK, of course */ | |
3074 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) | |
3075 | break; | |
3076 | /* cipher scheme might require space allocation */ | |
3077 | if (iv_spc && | |
3078 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) | |
3079 | goto out; | |
3080 | if (iv_spc) | |
3081 | build.hdr_len += build.key->conf.iv_len; | |
17c18bf8 JB |
3082 | } |
3083 | ||
3084 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
3085 | } | |
3086 | ||
3087 | hdr->frame_control = fc; | |
3088 | ||
3089 | memcpy(build.hdr + build.hdr_len, | |
3090 | rfc1042_header, sizeof(rfc1042_header)); | |
3091 | build.hdr_len += sizeof(rfc1042_header); | |
3092 | ||
3093 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); | |
3094 | /* if the kmemdup fails, continue w/o fast_tx */ | |
3095 | if (!fast_tx) | |
3096 | goto out; | |
3097 | ||
3098 | out: | |
3099 | /* we might have raced against another call to this function */ | |
3100 | old = rcu_dereference_protected(sta->fast_tx, | |
3101 | lockdep_is_held(&sta->lock)); | |
3102 | rcu_assign_pointer(sta->fast_tx, fast_tx); | |
3103 | if (old) | |
3104 | kfree_rcu(old, rcu_head); | |
3105 | spin_unlock_bh(&sta->lock); | |
3106 | } | |
3107 | ||
3108 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) | |
3109 | { | |
3110 | struct sta_info *sta; | |
3111 | ||
3112 | rcu_read_lock(); | |
3113 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3114 | ieee80211_check_fast_xmit(sta); | |
3115 | rcu_read_unlock(); | |
3116 | } | |
3117 | ||
3118 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) | |
3119 | { | |
3120 | struct ieee80211_local *local = sdata->local; | |
3121 | struct sta_info *sta; | |
3122 | ||
3123 | rcu_read_lock(); | |
3124 | ||
3125 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3126 | if (sdata != sta->sdata && | |
3127 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
3128 | continue; | |
3129 | ieee80211_check_fast_xmit(sta); | |
3130 | } | |
3131 | ||
3132 | rcu_read_unlock(); | |
3133 | } | |
3134 | ||
3135 | void ieee80211_clear_fast_xmit(struct sta_info *sta) | |
3136 | { | |
3137 | struct ieee80211_fast_tx *fast_tx; | |
3138 | ||
3139 | spin_lock_bh(&sta->lock); | |
3140 | fast_tx = rcu_dereference_protected(sta->fast_tx, | |
3141 | lockdep_is_held(&sta->lock)); | |
3142 | RCU_INIT_POINTER(sta->fast_tx, NULL); | |
3143 | spin_unlock_bh(&sta->lock); | |
3144 | ||
3145 | if (fast_tx) | |
3146 | kfree_rcu(fast_tx, rcu_head); | |
3147 | } | |
3148 | ||
6e0456b5 | 3149 | static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local, |
166ac9d5 | 3150 | struct sk_buff *skb, int headroom) |
6e0456b5 | 3151 | { |
166ac9d5 | 3152 | if (skb_headroom(skb) < headroom) { |
6e0456b5 FF |
3153 | I802_DEBUG_INC(local->tx_expand_skb_head); |
3154 | ||
166ac9d5 | 3155 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { |
6e0456b5 FF |
3156 | wiphy_debug(local->hw.wiphy, |
3157 | "failed to reallocate TX buffer\n"); | |
3158 | return false; | |
3159 | } | |
3160 | } | |
3161 | ||
6e0456b5 FF |
3162 | return true; |
3163 | } | |
3164 | ||
3165 | static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata, | |
3166 | struct ieee80211_fast_tx *fast_tx, | |
3167 | struct sk_buff *skb) | |
3168 | { | |
3169 | struct ieee80211_local *local = sdata->local; | |
3170 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3171 | struct ieee80211_hdr *hdr; | |
06f2bb1e | 3172 | struct ethhdr *amsdu_hdr; |
6e0456b5 FF |
3173 | int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header); |
3174 | int subframe_len = skb->len - hdr_len; | |
3175 | void *data; | |
06f2bb1e | 3176 | u8 *qc, *h_80211_src, *h_80211_dst; |
a3e2f4b6 | 3177 | const u8 *bssid; |
6e0456b5 FF |
3178 | |
3179 | if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) | |
3180 | return false; | |
3181 | ||
3182 | if (info->control.flags & IEEE80211_TX_CTRL_AMSDU) | |
3183 | return true; | |
3184 | ||
166ac9d5 | 3185 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr))) |
6e0456b5 FF |
3186 | return false; |
3187 | ||
06f2bb1e MB |
3188 | data = skb_push(skb, sizeof(*amsdu_hdr)); |
3189 | memmove(data, data + sizeof(*amsdu_hdr), hdr_len); | |
3190 | hdr = data; | |
3191 | amsdu_hdr = data + hdr_len; | |
3192 | /* h_80211_src/dst is addr* field within hdr */ | |
3193 | h_80211_src = data + fast_tx->sa_offs; | |
3194 | h_80211_dst = data + fast_tx->da_offs; | |
6e0456b5 | 3195 | |
06f2bb1e MB |
3196 | amsdu_hdr->h_proto = cpu_to_be16(subframe_len); |
3197 | ether_addr_copy(amsdu_hdr->h_source, h_80211_src); | |
3198 | ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst); | |
6e0456b5 | 3199 | |
a3e2f4b6 MB |
3200 | /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA |
3201 | * fields needs to be changed to BSSID for A-MSDU frames depending | |
3202 | * on FromDS/ToDS values. | |
3203 | */ | |
3204 | switch (sdata->vif.type) { | |
3205 | case NL80211_IFTYPE_STATION: | |
3206 | bssid = sdata->u.mgd.bssid; | |
3207 | break; | |
3208 | case NL80211_IFTYPE_AP: | |
3209 | case NL80211_IFTYPE_AP_VLAN: | |
3210 | bssid = sdata->vif.addr; | |
3211 | break; | |
3212 | default: | |
3213 | bssid = NULL; | |
3214 | } | |
3215 | ||
3216 | if (bssid && ieee80211_has_fromds(hdr->frame_control)) | |
3217 | ether_addr_copy(h_80211_src, bssid); | |
3218 | ||
3219 | if (bssid && ieee80211_has_tods(hdr->frame_control)) | |
3220 | ether_addr_copy(h_80211_dst, bssid); | |
3221 | ||
6e0456b5 FF |
3222 | qc = ieee80211_get_qos_ctl(hdr); |
3223 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
3224 | ||
3225 | info->control.flags |= IEEE80211_TX_CTRL_AMSDU; | |
3226 | ||
3227 | return true; | |
3228 | } | |
3229 | ||
3230 | static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, | |
3231 | struct sta_info *sta, | |
3232 | struct ieee80211_fast_tx *fast_tx, | |
3233 | struct sk_buff *skb) | |
3234 | { | |
3235 | struct ieee80211_local *local = sdata->local; | |
fa962b92 MK |
3236 | struct fq *fq = &local->fq; |
3237 | struct fq_tin *tin; | |
3238 | struct fq_flow *flow; | |
6e0456b5 FF |
3239 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
3240 | struct ieee80211_txq *txq = sta->sta.txq[tid]; | |
3241 | struct txq_info *txqi; | |
3242 | struct sk_buff **frag_tail, *head; | |
3243 | int subframe_len = skb->len - ETH_ALEN; | |
3244 | u8 max_subframes = sta->sta.max_amsdu_subframes; | |
3245 | int max_frags = local->hw.max_tx_fragments; | |
3246 | int max_amsdu_len = sta->sta.max_amsdu_len; | |
eb9b64e3 | 3247 | int orig_truesize; |
f2af2df8 | 3248 | u32 flow_idx; |
6e0456b5 FF |
3249 | __be16 len; |
3250 | void *data; | |
3251 | bool ret = false; | |
fa962b92 | 3252 | unsigned int orig_len; |
66eb02d8 | 3253 | int n = 2, nfrags, pad = 0; |
166ac9d5 | 3254 | u16 hdrlen; |
6e0456b5 FF |
3255 | |
3256 | if (!ieee80211_hw_check(&local->hw, TX_AMSDU)) | |
3257 | return false; | |
3258 | ||
344f8e00 SS |
3259 | if (skb_is_gso(skb)) |
3260 | return false; | |
3261 | ||
6e0456b5 FF |
3262 | if (!txq) |
3263 | return false; | |
3264 | ||
3265 | txqi = to_txq_info(txq); | |
3266 | if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags)) | |
3267 | return false; | |
3268 | ||
3269 | if (sta->sta.max_rc_amsdu_len) | |
3270 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3271 | sta->sta.max_rc_amsdu_len); | |
3272 | ||
edba6bda SS |
3273 | if (sta->sta.max_tid_amsdu_len[tid]) |
3274 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3275 | sta->sta.max_tid_amsdu_len[tid]); | |
3276 | ||
f2af2df8 FF |
3277 | flow_idx = fq_flow_idx(fq, skb); |
3278 | ||
fa962b92 | 3279 | spin_lock_bh(&fq->lock); |
6e0456b5 | 3280 | |
fa962b92 MK |
3281 | /* TODO: Ideally aggregation should be done on dequeue to remain |
3282 | * responsive to environment changes. | |
3283 | */ | |
3284 | ||
3285 | tin = &txqi->tin; | |
f2af2df8 FF |
3286 | flow = fq_flow_classify(fq, tin, flow_idx, skb, |
3287 | fq_flow_get_default_func); | |
fa962b92 | 3288 | head = skb_peek_tail(&flow->queue); |
344f8e00 | 3289 | if (!head || skb_is_gso(head)) |
6e0456b5 FF |
3290 | goto out; |
3291 | ||
eb9b64e3 | 3292 | orig_truesize = head->truesize; |
fa962b92 MK |
3293 | orig_len = head->len; |
3294 | ||
6e0456b5 FF |
3295 | if (skb->len + head->len > max_amsdu_len) |
3296 | goto out; | |
3297 | ||
6e0456b5 FF |
3298 | nfrags = 1 + skb_shinfo(skb)->nr_frags; |
3299 | nfrags += 1 + skb_shinfo(head)->nr_frags; | |
3300 | frag_tail = &skb_shinfo(head)->frag_list; | |
3301 | while (*frag_tail) { | |
3302 | nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags; | |
3303 | frag_tail = &(*frag_tail)->next; | |
3304 | n++; | |
3305 | } | |
3306 | ||
3307 | if (max_subframes && n > max_subframes) | |
3308 | goto out; | |
3309 | ||
3310 | if (max_frags && nfrags > max_frags) | |
3311 | goto out; | |
9739fe29 SS |
3312 | |
3313 | if (!drv_can_aggregate_in_amsdu(local, head, skb)) | |
3314 | goto out; | |
6e0456b5 | 3315 | |
1eb50790 | 3316 | if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head)) |
6e0456b5 FF |
3317 | goto out; |
3318 | ||
166ac9d5 SS |
3319 | /* |
3320 | * Pad out the previous subframe to a multiple of 4 by adding the | |
3321 | * padding to the next one, that's being added. Note that head->len | |
3322 | * is the length of the full A-MSDU, but that works since each time | |
3323 | * we add a new subframe we pad out the previous one to a multiple | |
3324 | * of 4 and thus it no longer matters in the next round. | |
3325 | */ | |
3326 | hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header); | |
3327 | if ((head->len - hdrlen) & 3) | |
3328 | pad = 4 - ((head->len - hdrlen) & 3); | |
3329 | ||
3330 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + | |
3331 | 2 + pad)) | |
aa58acf3 | 3332 | goto out_recalc; |
6e0456b5 FF |
3333 | |
3334 | ret = true; | |
3335 | data = skb_push(skb, ETH_ALEN + 2); | |
3336 | memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN); | |
3337 | ||
3338 | data += 2 * ETH_ALEN; | |
3339 | len = cpu_to_be16(subframe_len); | |
3340 | memcpy(data, &len, 2); | |
3341 | memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header)); | |
3342 | ||
166ac9d5 SS |
3343 | memset(skb_push(skb, pad), 0, pad); |
3344 | ||
6e0456b5 FF |
3345 | head->len += skb->len; |
3346 | head->data_len += skb->len; | |
3347 | *frag_tail = skb; | |
3348 | ||
aa58acf3 | 3349 | out_recalc: |
eb9b64e3 | 3350 | fq->memory_usage += head->truesize - orig_truesize; |
aa58acf3 JB |
3351 | if (head->len != orig_len) { |
3352 | flow->backlog += head->len - orig_len; | |
3353 | tin->backlog_bytes += head->len - orig_len; | |
fa962b92 | 3354 | |
aa58acf3 JB |
3355 | fq_recalc_backlog(fq, tin, flow); |
3356 | } | |
6e0456b5 | 3357 | out: |
fa962b92 | 3358 | spin_unlock_bh(&fq->lock); |
6e0456b5 FF |
3359 | |
3360 | return ret; | |
3361 | } | |
3362 | ||
bb42f2d1 THJ |
3363 | /* |
3364 | * Can be called while the sta lock is held. Anything that can cause packets to | |
3365 | * be generated will cause deadlock! | |
3366 | */ | |
3367 | static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata, | |
3368 | struct sta_info *sta, u8 pn_offs, | |
3369 | struct ieee80211_key *key, | |
3370 | struct sk_buff *skb) | |
3371 | { | |
3372 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3373 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3374 | u8 tid = IEEE80211_NUM_TIDS; | |
3375 | ||
3376 | if (key) | |
3377 | info->control.hw_key = &key->conf; | |
3378 | ||
36ec144f | 3379 | dev_sw_netstats_tx_add(skb->dev, 1, skb->len); |
bb42f2d1 THJ |
3380 | |
3381 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3382 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
bb42f2d1 THJ |
3383 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); |
3384 | } else { | |
3385 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
3386 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); | |
3387 | sdata->sequence_number += 0x10; | |
3388 | } | |
3389 | ||
3390 | if (skb_shinfo(skb)->gso_size) | |
3391 | sta->tx_stats.msdu[tid] += | |
3392 | DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size); | |
3393 | else | |
3394 | sta->tx_stats.msdu[tid]++; | |
3395 | ||
3396 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
3397 | ||
3398 | /* statistics normally done by ieee80211_tx_h_stats (but that | |
3399 | * has to consider fragmentation, so is more complex) | |
3400 | */ | |
3401 | sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; | |
3402 | sta->tx_stats.packets[skb_get_queue_mapping(skb)]++; | |
3403 | ||
3404 | if (pn_offs) { | |
3405 | u64 pn; | |
3406 | u8 *crypto_hdr = skb->data + pn_offs; | |
3407 | ||
3408 | switch (key->conf.cipher) { | |
3409 | case WLAN_CIPHER_SUITE_CCMP: | |
3410 | case WLAN_CIPHER_SUITE_CCMP_256: | |
3411 | case WLAN_CIPHER_SUITE_GCMP: | |
3412 | case WLAN_CIPHER_SUITE_GCMP_256: | |
3413 | pn = atomic64_inc_return(&key->conf.tx_pn); | |
3414 | crypto_hdr[0] = pn; | |
3415 | crypto_hdr[1] = pn >> 8; | |
96fc6efb | 3416 | crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6); |
bb42f2d1 THJ |
3417 | crypto_hdr[4] = pn >> 16; |
3418 | crypto_hdr[5] = pn >> 24; | |
3419 | crypto_hdr[6] = pn >> 32; | |
3420 | crypto_hdr[7] = pn >> 40; | |
3421 | break; | |
3422 | } | |
3423 | } | |
3424 | } | |
3425 | ||
17c18bf8 | 3426 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, |
bb42f2d1 | 3427 | struct sta_info *sta, |
17c18bf8 JB |
3428 | struct ieee80211_fast_tx *fast_tx, |
3429 | struct sk_buff *skb) | |
3430 | { | |
3431 | struct ieee80211_local *local = sdata->local; | |
3432 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; | |
3433 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); | |
3434 | int hw_headroom = sdata->local->hw.extra_tx_headroom; | |
3435 | struct ethhdr eth; | |
35f432a0 | 3436 | struct ieee80211_tx_info *info; |
17c18bf8 JB |
3437 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; |
3438 | struct ieee80211_tx_data tx; | |
3439 | ieee80211_tx_result r; | |
3440 | struct tid_ampdu_tx *tid_tx = NULL; | |
3441 | u8 tid = IEEE80211_NUM_TIDS; | |
3442 | ||
3443 | /* control port protocol needs a lot of special handling */ | |
3444 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) | |
3445 | return false; | |
3446 | ||
3447 | /* only RFC 1042 SNAP */ | |
3448 | if (ethertype < ETH_P_802_3_MIN) | |
3449 | return false; | |
3450 | ||
3451 | /* don't handle TX status request here either */ | |
3452 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) | |
3453 | return false; | |
3454 | ||
3455 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3456 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3457 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
472be00d JB |
3458 | if (tid_tx) { |
3459 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) | |
3460 | return false; | |
3461 | if (tid_tx->timeout) | |
3462 | tid_tx->last_tx = jiffies; | |
3463 | } | |
17c18bf8 JB |
3464 | } |
3465 | ||
3466 | /* after this point (skb is modified) we cannot return false */ | |
3467 | ||
3468 | if (skb_shared(skb)) { | |
3469 | struct sk_buff *tmp_skb = skb; | |
3470 | ||
3471 | skb = skb_clone(skb, GFP_ATOMIC); | |
3472 | kfree_skb(tmp_skb); | |
3473 | ||
3474 | if (!skb) | |
3475 | return true; | |
3476 | } | |
3477 | ||
6e0456b5 FF |
3478 | if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) && |
3479 | ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb)) | |
3480 | return true; | |
3481 | ||
17c18bf8 JB |
3482 | /* will not be crypto-handled beyond what we do here, so use false |
3483 | * as the may-encrypt argument for the resize to not account for | |
3484 | * more room than we already have in 'extra_head' | |
3485 | */ | |
3486 | if (unlikely(ieee80211_skb_resize(sdata, skb, | |
3487 | max_t(int, extra_head + hw_headroom - | |
3488 | skb_headroom(skb), 0), | |
14f46c1e | 3489 | ENCRYPT_NO))) { |
17c18bf8 JB |
3490 | kfree_skb(skb); |
3491 | return true; | |
3492 | } | |
3493 | ||
3494 | memcpy(ð, skb->data, ETH_HLEN - 2); | |
d58ff351 | 3495 | hdr = skb_push(skb, extra_head); |
17c18bf8 JB |
3496 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); |
3497 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); | |
3498 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); | |
3499 | ||
35f432a0 | 3500 | info = IEEE80211_SKB_CB(skb); |
17c18bf8 JB |
3501 | memset(info, 0, sizeof(*info)); |
3502 | info->band = fast_tx->band; | |
3503 | info->control.vif = &sdata->vif; | |
3504 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | | |
3505 | IEEE80211_TX_CTL_DONTFRAG | | |
3506 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); | |
bb42f2d1 | 3507 | info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT; |
17c18bf8 | 3508 | |
276d9e82 JN |
3509 | #ifdef CONFIG_MAC80211_DEBUGFS |
3510 | if (local->force_tx_status) | |
3511 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
3512 | #endif | |
3513 | ||
a786f96d FF |
3514 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { |
3515 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3516 | *ieee80211_get_qos_ctl(hdr) = tid; | |
3517 | } | |
3518 | ||
17c18bf8 JB |
3519 | __skb_queue_head_init(&tx.skbs); |
3520 | ||
3521 | tx.flags = IEEE80211_TX_UNICAST; | |
3522 | tx.local = local; | |
3523 | tx.sdata = sdata; | |
3524 | tx.sta = sta; | |
3525 | tx.key = fast_tx->key; | |
3526 | ||
30686bf7 | 3527 | if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) { |
17c18bf8 JB |
3528 | tx.skb = skb; |
3529 | r = ieee80211_tx_h_rate_ctrl(&tx); | |
3530 | skb = tx.skb; | |
3531 | tx.skb = NULL; | |
3532 | ||
3533 | if (r != TX_CONTINUE) { | |
3534 | if (r != TX_QUEUED) | |
3535 | kfree_skb(skb); | |
3536 | return true; | |
3537 | } | |
3538 | } | |
3539 | ||
bb42f2d1 THJ |
3540 | if (ieee80211_queue_skb(local, sdata, sta, skb)) |
3541 | return true; | |
17c18bf8 | 3542 | |
bb42f2d1 THJ |
3543 | ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs, |
3544 | fast_tx->key, skb); | |
17c18bf8 JB |
3545 | |
3546 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3547 | sdata = container_of(sdata->bss, | |
3548 | struct ieee80211_sub_if_data, u.ap); | |
3549 | ||
3550 | __skb_queue_tail(&tx.skbs, skb); | |
4fd0328d | 3551 | ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false); |
17c18bf8 JB |
3552 | return true; |
3553 | } | |
3554 | ||
e0e2efff THJ |
3555 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, |
3556 | struct ieee80211_txq *txq) | |
3557 | { | |
3558 | struct ieee80211_local *local = hw_to_local(hw); | |
3559 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); | |
3560 | struct ieee80211_hdr *hdr; | |
3561 | struct sk_buff *skb = NULL; | |
3562 | struct fq *fq = &local->fq; | |
3563 | struct fq_tin *tin = &txqi->tin; | |
bb42f2d1 THJ |
3564 | struct ieee80211_tx_info *info; |
3565 | struct ieee80211_tx_data tx; | |
3566 | ieee80211_tx_result r; | |
21a5d4c3 | 3567 | struct ieee80211_vif *vif = txq->vif; |
e0e2efff | 3568 | |
fb0e76ab ES |
3569 | WARN_ON_ONCE(softirq_count() == 0); |
3570 | ||
7a89233a THJ |
3571 | if (!ieee80211_txq_airtime_check(hw, txq)) |
3572 | return NULL; | |
3573 | ||
ded4698b | 3574 | begin: |
e0e2efff THJ |
3575 | spin_lock_bh(&fq->lock); |
3576 | ||
21a5d4c3 MP |
3577 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) || |
3578 | test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags)) | |
e0e2efff THJ |
3579 | goto out; |
3580 | ||
21a5d4c3 MP |
3581 | if (vif->txqs_stopped[ieee80211_ac_from_tid(txq->tid)]) { |
3582 | set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags); | |
3583 | goto out; | |
3584 | } | |
3585 | ||
bb42f2d1 THJ |
3586 | /* Make sure fragments stay together. */ |
3587 | skb = __skb_dequeue(&txqi->frags); | |
3588 | if (skb) | |
3589 | goto out; | |
3590 | ||
e0e2efff THJ |
3591 | skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func); |
3592 | if (!skb) | |
3593 | goto out; | |
3594 | ||
ded4698b FF |
3595 | spin_unlock_bh(&fq->lock); |
3596 | ||
e0e2efff | 3597 | hdr = (struct ieee80211_hdr *)skb->data; |
bb42f2d1 THJ |
3598 | info = IEEE80211_SKB_CB(skb); |
3599 | ||
3600 | memset(&tx, 0, sizeof(tx)); | |
3601 | __skb_queue_head_init(&tx.skbs); | |
3602 | tx.local = local; | |
3603 | tx.skb = skb; | |
3604 | tx.sdata = vif_to_sdata(info->control.vif); | |
3605 | ||
804fc6a2 | 3606 | if (txq->sta) { |
bb42f2d1 | 3607 | tx.sta = container_of(txq->sta, struct sta_info, sta); |
ce2e1ca7 JM |
3608 | /* |
3609 | * Drop unicast frames to unauthorised stations unless they are | |
804fc6a2 | 3610 | * injected frames or EAPOL frames from the local station. |
ce2e1ca7 | 3611 | */ |
804fc6a2 MV |
3612 | if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) && |
3613 | ieee80211_is_data(hdr->frame_control) && | |
be8c827f | 3614 | !ieee80211_vif_is_mesh(&tx.sdata->vif) && |
ce2e1ca7 JM |
3615 | tx.sdata->vif.type != NL80211_IFTYPE_OCB && |
3616 | !is_multicast_ether_addr(hdr->addr1) && | |
3617 | !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) && | |
3618 | (!(info->control.flags & | |
3619 | IEEE80211_TX_CTRL_PORT_CTRL_PROTO) || | |
3620 | !ether_addr_equal(tx.sdata->vif.addr, | |
3621 | hdr->addr2)))) { | |
3622 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
3623 | ieee80211_free_txskb(&local->hw, skb); | |
3624 | goto begin; | |
3625 | } | |
3626 | } | |
bb42f2d1 THJ |
3627 | |
3628 | /* | |
3629 | * The key can be removed while the packet was queued, so need to call | |
3630 | * this here to get the current key. | |
3631 | */ | |
3632 | r = ieee80211_tx_h_select_key(&tx); | |
3633 | if (r != TX_CONTINUE) { | |
3634 | ieee80211_free_txskb(&local->hw, skb); | |
3635 | goto begin; | |
3636 | } | |
3637 | ||
c1f4c9ed FF |
3638 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) |
3639 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
3640 | else | |
3641 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
3642 | ||
cc20ff2c | 3643 | if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) |
50ff477a JC |
3644 | goto encap_out; |
3645 | ||
bb42f2d1 | 3646 | if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) { |
e0e2efff THJ |
3647 | struct sta_info *sta = container_of(txq->sta, struct sta_info, |
3648 | sta); | |
bb42f2d1 | 3649 | u8 pn_offs = 0; |
e0e2efff | 3650 | |
bb42f2d1 THJ |
3651 | if (tx.key && |
3652 | (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) | |
3653 | pn_offs = ieee80211_hdrlen(hdr->frame_control); | |
3654 | ||
3655 | ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs, | |
3656 | tx.key, skb); | |
3657 | } else { | |
3658 | if (invoke_tx_handlers_late(&tx)) | |
3659 | goto begin; | |
3660 | ||
3661 | skb = __skb_dequeue(&tx.skbs); | |
3662 | ||
ded4698b FF |
3663 | if (!skb_queue_empty(&tx.skbs)) { |
3664 | spin_lock_bh(&fq->lock); | |
bb42f2d1 | 3665 | skb_queue_splice_tail(&tx.skbs, &txqi->frags); |
ded4698b FF |
3666 | spin_unlock_bh(&fq->lock); |
3667 | } | |
e0e2efff THJ |
3668 | } |
3669 | ||
233e98dc | 3670 | if (skb_has_frag_list(skb) && |
1e1430d5 JB |
3671 | !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) { |
3672 | if (skb_linearize(skb)) { | |
3673 | ieee80211_free_txskb(&local->hw, skb); | |
3674 | goto begin; | |
3675 | } | |
3676 | } | |
3677 | ||
53168215 JB |
3678 | switch (tx.sdata->vif.type) { |
3679 | case NL80211_IFTYPE_MONITOR: | |
3680 | if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { | |
3681 | vif = &tx.sdata->vif; | |
3682 | break; | |
3683 | } | |
3684 | tx.sdata = rcu_dereference(local->monitor_sdata); | |
3685 | if (tx.sdata) { | |
3686 | vif = &tx.sdata->vif; | |
3687 | info->hw_queue = | |
3688 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
3689 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { | |
3690 | ieee80211_free_txskb(&local->hw, skb); | |
3691 | goto begin; | |
3692 | } else { | |
3693 | vif = NULL; | |
3694 | } | |
3695 | break; | |
3696 | case NL80211_IFTYPE_AP_VLAN: | |
3697 | tx.sdata = container_of(tx.sdata->bss, | |
3698 | struct ieee80211_sub_if_data, u.ap); | |
fc0561dc | 3699 | fallthrough; |
53168215 JB |
3700 | default: |
3701 | vif = &tx.sdata->vif; | |
3702 | break; | |
3703 | } | |
3704 | ||
50ff477a | 3705 | encap_out: |
53168215 | 3706 | IEEE80211_SKB_CB(skb)->control.vif = vif; |
7a89233a | 3707 | |
ca98c47d JB |
3708 | if (vif && |
3709 | wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) { | |
3ff901cb | 3710 | bool ampdu = txq->ac != IEEE80211_AC_VO; |
7a89233a THJ |
3711 | u32 airtime; |
3712 | ||
3713 | airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta, | |
3ff901cb | 3714 | skb->len, ampdu); |
7a89233a THJ |
3715 | if (airtime) { |
3716 | airtime = ieee80211_info_set_tx_time_est(info, airtime); | |
3717 | ieee80211_sta_update_pending_airtime(local, tx.sta, | |
3718 | txq->ac, | |
3719 | airtime, | |
3720 | false); | |
3721 | } | |
3722 | } | |
3723 | ||
ded4698b | 3724 | return skb; |
21a5d4c3 | 3725 | |
e0e2efff THJ |
3726 | out: |
3727 | spin_unlock_bh(&fq->lock); | |
3728 | ||
e0e2efff THJ |
3729 | return skb; |
3730 | } | |
3731 | EXPORT_SYMBOL(ieee80211_tx_dequeue); | |
3732 | ||
18667600 THJ |
3733 | struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac) |
3734 | { | |
3735 | struct ieee80211_local *local = hw_to_local(hw); | |
5b989c18 | 3736 | struct ieee80211_txq *ret = NULL; |
3ace10f5 KY |
3737 | struct txq_info *txqi = NULL, *head = NULL; |
3738 | bool found_eligible_txq = false; | |
18667600 | 3739 | |
5b989c18 | 3740 | spin_lock_bh(&local->active_txq_lock[ac]); |
18667600 | 3741 | |
b4809e94 | 3742 | begin: |
18667600 THJ |
3743 | txqi = list_first_entry_or_null(&local->active_txqs[ac], |
3744 | struct txq_info, | |
3745 | schedule_order); | |
b4809e94 | 3746 | if (!txqi) |
5b989c18 | 3747 | goto out; |
b4809e94 | 3748 | |
3ace10f5 KY |
3749 | if (txqi == head) { |
3750 | if (!found_eligible_txq) | |
3751 | goto out; | |
3752 | else | |
3753 | found_eligible_txq = false; | |
3754 | } | |
3755 | ||
3756 | if (!head) | |
3757 | head = txqi; | |
3758 | ||
b4809e94 THJ |
3759 | if (txqi->txq.sta) { |
3760 | struct sta_info *sta = container_of(txqi->txq.sta, | |
3ace10f5 KY |
3761 | struct sta_info, sta); |
3762 | bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq); | |
3763 | s64 deficit = sta->airtime[txqi->txq.ac].deficit; | |
b4809e94 | 3764 | |
3ace10f5 KY |
3765 | if (aql_check) |
3766 | found_eligible_txq = true; | |
3767 | ||
3768 | if (deficit < 0) | |
b4809e94 THJ |
3769 | sta->airtime[txqi->txq.ac].deficit += |
3770 | sta->airtime_weight; | |
3ace10f5 KY |
3771 | |
3772 | if (deficit < 0 || !aql_check) { | |
b4809e94 THJ |
3773 | list_move_tail(&txqi->schedule_order, |
3774 | &local->active_txqs[txqi->txq.ac]); | |
3775 | goto begin; | |
3776 | } | |
3777 | } | |
3778 | ||
18667600 | 3779 | |
b4809e94 | 3780 | if (txqi->schedule_round == local->schedule_round[ac]) |
5b989c18 | 3781 | goto out; |
18667600 THJ |
3782 | |
3783 | list_del_init(&txqi->schedule_order); | |
3784 | txqi->schedule_round = local->schedule_round[ac]; | |
5b989c18 FF |
3785 | ret = &txqi->txq; |
3786 | ||
3787 | out: | |
3788 | spin_unlock_bh(&local->active_txq_lock[ac]); | |
3789 | return ret; | |
18667600 THJ |
3790 | } |
3791 | EXPORT_SYMBOL(ieee80211_next_txq); | |
3792 | ||
2b4a6698 FF |
3793 | void __ieee80211_schedule_txq(struct ieee80211_hw *hw, |
3794 | struct ieee80211_txq *txq, | |
3795 | bool force) | |
18667600 THJ |
3796 | { |
3797 | struct ieee80211_local *local = hw_to_local(hw); | |
3798 | struct txq_info *txqi = to_txq_info(txq); | |
3799 | ||
5b989c18 | 3800 | spin_lock_bh(&local->active_txq_lock[txq->ac]); |
18667600 THJ |
3801 | |
3802 | if (list_empty(&txqi->schedule_order) && | |
2b4a6698 FF |
3803 | (force || !skb_queue_empty(&txqi->frags) || |
3804 | txqi->tin.backlog_packets)) { | |
b4809e94 THJ |
3805 | /* If airtime accounting is active, always enqueue STAs at the |
3806 | * head of the list to ensure that they only get moved to the | |
3807 | * back by the airtime DRR scheduler once they have a negative | |
3808 | * deficit. A station that already has a negative deficit will | |
3809 | * get immediately moved to the back of the list on the next | |
3810 | * call to ieee80211_next_txq(). | |
3811 | */ | |
3812 | if (txqi->txq.sta && | |
3813 | wiphy_ext_feature_isset(local->hw.wiphy, | |
3814 | NL80211_EXT_FEATURE_AIRTIME_FAIRNESS)) | |
3815 | list_add(&txqi->schedule_order, | |
3816 | &local->active_txqs[txq->ac]); | |
3817 | else | |
3818 | list_add_tail(&txqi->schedule_order, | |
3819 | &local->active_txqs[txq->ac]); | |
3820 | } | |
18667600 | 3821 | |
390298e8 THJ |
3822 | spin_unlock_bh(&local->active_txq_lock[txq->ac]); |
3823 | } | |
2b4a6698 | 3824 | EXPORT_SYMBOL(__ieee80211_schedule_txq); |
390298e8 | 3825 | |
3ace10f5 KY |
3826 | bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw, |
3827 | struct ieee80211_txq *txq) | |
3828 | { | |
3829 | struct sta_info *sta; | |
3830 | struct ieee80211_local *local = hw_to_local(hw); | |
3831 | ||
911bde0f | 3832 | if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) |
3ace10f5 KY |
3833 | return true; |
3834 | ||
3835 | if (!txq->sta) | |
3836 | return true; | |
3837 | ||
3838 | sta = container_of(txq->sta, struct sta_info, sta); | |
3839 | if (atomic_read(&sta->airtime[txq->ac].aql_tx_pending) < | |
3840 | sta->airtime[txq->ac].aql_limit_low) | |
3841 | return true; | |
3842 | ||
3843 | if (atomic_read(&local->aql_total_pending_airtime) < | |
3844 | local->aql_threshold && | |
3845 | atomic_read(&sta->airtime[txq->ac].aql_tx_pending) < | |
3846 | sta->airtime[txq->ac].aql_limit_high) | |
3847 | return true; | |
3848 | ||
3849 | return false; | |
3850 | } | |
3851 | EXPORT_SYMBOL(ieee80211_txq_airtime_check); | |
3852 | ||
b4809e94 THJ |
3853 | bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw, |
3854 | struct ieee80211_txq *txq) | |
3855 | { | |
3856 | struct ieee80211_local *local = hw_to_local(hw); | |
3857 | struct txq_info *iter, *tmp, *txqi = to_txq_info(txq); | |
3858 | struct sta_info *sta; | |
3859 | u8 ac = txq->ac; | |
3860 | ||
5b989c18 | 3861 | spin_lock_bh(&local->active_txq_lock[ac]); |
b4809e94 THJ |
3862 | |
3863 | if (!txqi->txq.sta) | |
3864 | goto out; | |
3865 | ||
3866 | if (list_empty(&txqi->schedule_order)) | |
3867 | goto out; | |
3868 | ||
3869 | list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac], | |
3870 | schedule_order) { | |
3871 | if (iter == txqi) | |
3872 | break; | |
3873 | ||
3874 | if (!iter->txq.sta) { | |
3875 | list_move_tail(&iter->schedule_order, | |
3876 | &local->active_txqs[ac]); | |
3877 | continue; | |
3878 | } | |
3879 | sta = container_of(iter->txq.sta, struct sta_info, sta); | |
3880 | if (sta->airtime[ac].deficit < 0) | |
3881 | sta->airtime[ac].deficit += sta->airtime_weight; | |
3882 | list_move_tail(&iter->schedule_order, &local->active_txqs[ac]); | |
3883 | } | |
3884 | ||
3885 | sta = container_of(txqi->txq.sta, struct sta_info, sta); | |
3886 | if (sta->airtime[ac].deficit >= 0) | |
3887 | goto out; | |
3888 | ||
3889 | sta->airtime[ac].deficit += sta->airtime_weight; | |
3890 | list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]); | |
5b989c18 | 3891 | spin_unlock_bh(&local->active_txq_lock[ac]); |
b4809e94 THJ |
3892 | |
3893 | return false; | |
3894 | out: | |
3895 | if (!list_empty(&txqi->schedule_order)) | |
3896 | list_del_init(&txqi->schedule_order); | |
5b989c18 | 3897 | spin_unlock_bh(&local->active_txq_lock[ac]); |
b4809e94 THJ |
3898 | |
3899 | return true; | |
3900 | } | |
3901 | EXPORT_SYMBOL(ieee80211_txq_may_transmit); | |
3902 | ||
18667600 | 3903 | void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac) |
18667600 THJ |
3904 | { |
3905 | struct ieee80211_local *local = hw_to_local(hw); | |
3906 | ||
3907 | spin_lock_bh(&local->active_txq_lock[ac]); | |
3908 | local->schedule_round[ac]++; | |
18667600 THJ |
3909 | spin_unlock_bh(&local->active_txq_lock[ac]); |
3910 | } | |
5b989c18 | 3911 | EXPORT_SYMBOL(ieee80211_txq_schedule_start); |
18667600 | 3912 | |
4c9451ed JB |
3913 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
3914 | struct net_device *dev, | |
06016772 | 3915 | u32 info_flags, |
a7528198 MT |
3916 | u32 ctrl_flags, |
3917 | u64 *cookie) | |
4c9451ed JB |
3918 | { |
3919 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1974da8b | 3920 | struct ieee80211_local *local = sdata->local; |
97ffe757 | 3921 | struct sta_info *sta; |
80616c0d | 3922 | struct sk_buff *next; |
4c9451ed JB |
3923 | |
3924 | if (unlikely(skb->len < ETH_HLEN)) { | |
3925 | kfree_skb(skb); | |
3926 | return; | |
3927 | } | |
3928 | ||
3929 | rcu_read_lock(); | |
e2ebc74d | 3930 | |
2d981fdd JB |
3931 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
3932 | goto out_free; | |
4c9451ed | 3933 | |
1974da8b FF |
3934 | if (IS_ERR(sta)) |
3935 | sta = NULL; | |
3936 | ||
3937 | if (local->ops->wake_tx_queue) { | |
3938 | u16 queue = __ieee80211_select_queue(sdata, sta, skb); | |
3939 | skb_set_queue_mapping(skb, queue); | |
180ac48e | 3940 | skb_get_hash(skb); |
1974da8b FF |
3941 | } |
3942 | ||
3943 | if (sta) { | |
17c18bf8 JB |
3944 | struct ieee80211_fast_tx *fast_tx; |
3945 | ||
70e53669 | 3946 | sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift); |
36148c2b | 3947 | |
17c18bf8 JB |
3948 | fast_tx = rcu_dereference(sta->fast_tx); |
3949 | ||
3950 | if (fast_tx && | |
bb42f2d1 | 3951 | ieee80211_xmit_fast(sdata, sta, fast_tx, skb)) |
17c18bf8 JB |
3952 | goto out; |
3953 | } | |
3954 | ||
80616c0d JB |
3955 | if (skb_is_gso(skb)) { |
3956 | struct sk_buff *segs; | |
680a0dab | 3957 | |
80616c0d JB |
3958 | segs = skb_gso_segment(skb, 0); |
3959 | if (IS_ERR(segs)) { | |
2d981fdd | 3960 | goto out_free; |
80616c0d JB |
3961 | } else if (segs) { |
3962 | consume_skb(skb); | |
3963 | skb = segs; | |
3964 | } | |
3965 | } else { | |
3966 | /* we cannot process non-linear frames on this path */ | |
3967 | if (skb_linearize(skb)) { | |
3968 | kfree_skb(skb); | |
3969 | goto out; | |
3970 | } | |
3971 | ||
3972 | /* the frame could be fragmented, software-encrypted, and other | |
3973 | * things so we cannot really handle checksum offload with it - | |
3974 | * fix it up in software before we handle anything else. | |
3975 | */ | |
3976 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
f603f1f3 JB |
3977 | skb_set_transport_header(skb, |
3978 | skb_checksum_start_offset(skb)); | |
80616c0d JB |
3979 | if (skb_checksum_help(skb)) |
3980 | goto out_free; | |
3981 | } | |
2d981fdd JB |
3982 | } |
3983 | ||
9f3ef3d7 JD |
3984 | skb_list_walk_safe(skb, skb, next) { |
3985 | skb_mark_not_on_list(skb); | |
80616c0d | 3986 | |
5af7fef3 MT |
3987 | if (skb->protocol == sdata->control_port_protocol) |
3988 | ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP; | |
3989 | ||
06016772 | 3990 | skb = ieee80211_build_hdr(sdata, skb, info_flags, |
a7528198 | 3991 | sta, ctrl_flags, cookie); |
9f3ef3d7 JD |
3992 | if (IS_ERR(skb)) { |
3993 | kfree_skb_list(next); | |
80616c0d | 3994 | goto out; |
9f3ef3d7 | 3995 | } |
e2ebc74d | 3996 | |
36ec144f | 3997 | dev_sw_netstats_tx_add(dev, 1, skb->len); |
80616c0d | 3998 | |
08aca29a | 3999 | ieee80211_xmit(sdata, sta, skb); |
80616c0d | 4000 | } |
2d981fdd JB |
4001 | goto out; |
4002 | out_free: | |
4003 | kfree_skb(skb); | |
4c9451ed | 4004 | out: |
55de908a | 4005 | rcu_read_unlock(); |
e2ebc74d JB |
4006 | } |
4007 | ||
ebceec86 MB |
4008 | static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta) |
4009 | { | |
4010 | struct ethhdr *eth; | |
4011 | int err; | |
4012 | ||
4013 | err = skb_ensure_writable(skb, ETH_HLEN); | |
4014 | if (unlikely(err)) | |
4015 | return err; | |
4016 | ||
4017 | eth = (void *)skb->data; | |
4018 | ether_addr_copy(eth->h_dest, sta->sta.addr); | |
4019 | ||
4020 | return 0; | |
4021 | } | |
4022 | ||
4023 | static bool ieee80211_multicast_to_unicast(struct sk_buff *skb, | |
4024 | struct net_device *dev) | |
4025 | { | |
4026 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4027 | const struct ethhdr *eth = (void *)skb->data; | |
4028 | const struct vlan_ethhdr *ethvlan = (void *)skb->data; | |
4029 | __be16 ethertype; | |
4030 | ||
4031 | if (likely(!is_multicast_ether_addr(eth->h_dest))) | |
4032 | return false; | |
4033 | ||
4034 | switch (sdata->vif.type) { | |
4035 | case NL80211_IFTYPE_AP_VLAN: | |
4036 | if (sdata->u.vlan.sta) | |
4037 | return false; | |
4038 | if (sdata->wdev.use_4addr) | |
4039 | return false; | |
fc0561dc | 4040 | fallthrough; |
ebceec86 MB |
4041 | case NL80211_IFTYPE_AP: |
4042 | /* check runtime toggle for this bss */ | |
4043 | if (!sdata->bss->multicast_to_unicast) | |
4044 | return false; | |
4045 | break; | |
4046 | default: | |
4047 | return false; | |
4048 | } | |
4049 | ||
4050 | /* multicast to unicast conversion only for some payload */ | |
4051 | ethertype = eth->h_proto; | |
4052 | if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN) | |
4053 | ethertype = ethvlan->h_vlan_encapsulated_proto; | |
4054 | switch (ethertype) { | |
4055 | case htons(ETH_P_ARP): | |
4056 | case htons(ETH_P_IP): | |
4057 | case htons(ETH_P_IPV6): | |
4058 | break; | |
4059 | default: | |
4060 | return false; | |
4061 | } | |
4062 | ||
4063 | return true; | |
4064 | } | |
4065 | ||
4066 | static void | |
4067 | ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev, | |
4068 | struct sk_buff_head *queue) | |
4069 | { | |
4070 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4071 | struct ieee80211_local *local = sdata->local; | |
4072 | const struct ethhdr *eth = (struct ethhdr *)skb->data; | |
4073 | struct sta_info *sta, *first = NULL; | |
4074 | struct sk_buff *cloned_skb; | |
4075 | ||
4076 | rcu_read_lock(); | |
4077 | ||
4078 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
4079 | if (sdata != sta->sdata) | |
4080 | /* AP-VLAN mismatch */ | |
4081 | continue; | |
4082 | if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr))) | |
4083 | /* do not send back to source */ | |
4084 | continue; | |
4085 | if (!first) { | |
4086 | first = sta; | |
4087 | continue; | |
4088 | } | |
4089 | cloned_skb = skb_clone(skb, GFP_ATOMIC); | |
4090 | if (!cloned_skb) | |
4091 | goto multicast; | |
4092 | if (unlikely(ieee80211_change_da(cloned_skb, sta))) { | |
4093 | dev_kfree_skb(cloned_skb); | |
4094 | goto multicast; | |
4095 | } | |
4096 | __skb_queue_tail(queue, cloned_skb); | |
4097 | } | |
4098 | ||
4099 | if (likely(first)) { | |
4100 | if (unlikely(ieee80211_change_da(skb, first))) | |
4101 | goto multicast; | |
4102 | __skb_queue_tail(queue, skb); | |
4103 | } else { | |
4104 | /* no STA connected, drop */ | |
4105 | kfree_skb(skb); | |
4106 | skb = NULL; | |
4107 | } | |
4108 | ||
4109 | goto out; | |
4110 | multicast: | |
4111 | __skb_queue_purge(queue); | |
4112 | __skb_queue_tail(queue, skb); | |
4113 | out: | |
4114 | rcu_read_unlock(); | |
4115 | } | |
4116 | ||
4c9451ed JB |
4117 | /** |
4118 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
4119 | * @skb: packet to be sent | |
4120 | * @dev: incoming interface | |
4121 | * | |
4122 | * On failure skb will be freed. | |
4123 | */ | |
24d342c5 LK |
4124 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
4125 | struct net_device *dev) | |
4126 | { | |
ebceec86 MB |
4127 | if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) { |
4128 | struct sk_buff_head queue; | |
4129 | ||
4130 | __skb_queue_head_init(&queue); | |
4131 | ieee80211_convert_to_unicast(skb, dev, &queue); | |
4132 | while ((skb = __skb_dequeue(&queue))) | |
a7528198 | 4133 | __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL); |
ebceec86 | 4134 | } else { |
a7528198 | 4135 | __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL); |
ebceec86 MB |
4136 | } |
4137 | ||
24d342c5 LK |
4138 | return NETDEV_TX_OK; |
4139 | } | |
e2ebc74d | 4140 | |
50ff477a JC |
4141 | static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata, |
4142 | struct sk_buff *skb, int led_len, | |
4143 | struct sta_info *sta, | |
4144 | bool txpending) | |
4145 | { | |
4146 | struct ieee80211_local *local = sdata->local; | |
4147 | struct ieee80211_tx_control control = {}; | |
4148 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
4149 | struct ieee80211_sta *pubsta = NULL; | |
4150 | unsigned long flags; | |
4151 | int q = info->hw_queue; | |
4152 | ||
4153 | if (ieee80211_queue_skb(local, sdata, sta, skb)) | |
4154 | return true; | |
4155 | ||
4156 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
4157 | ||
4158 | if (local->queue_stop_reasons[q] || | |
4159 | (!txpending && !skb_queue_empty(&local->pending[q]))) { | |
4160 | if (txpending) | |
4161 | skb_queue_head(&local->pending[q], skb); | |
4162 | else | |
4163 | skb_queue_tail(&local->pending[q], skb); | |
4164 | ||
4165 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
4166 | ||
4167 | return false; | |
4168 | } | |
4169 | ||
4170 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
4171 | ||
4172 | if (sta && sta->uploaded) | |
4173 | pubsta = &sta->sta; | |
4174 | ||
4175 | control.sta = pubsta; | |
4176 | ||
4177 | drv_tx(local, &control, skb); | |
4178 | ||
4179 | return true; | |
4180 | } | |
4181 | ||
4182 | static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata, | |
4183 | struct net_device *dev, struct sta_info *sta, | |
6aea26ce | 4184 | struct ieee80211_key *key, struct sk_buff *skb) |
50ff477a JC |
4185 | { |
4186 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
50ff477a | 4187 | struct ieee80211_local *local = sdata->local; |
96ae9cd0 FF |
4188 | struct tid_ampdu_tx *tid_tx; |
4189 | u8 tid; | |
50ff477a | 4190 | |
5f8d69ea FF |
4191 | if (local->ops->wake_tx_queue) { |
4192 | u16 queue = __ieee80211_select_queue(sdata, sta, skb); | |
4193 | skb_set_queue_mapping(skb, queue); | |
4194 | skb_get_hash(skb); | |
4195 | } | |
4196 | ||
50ff477a JC |
4197 | if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) && |
4198 | test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) | |
4199 | goto out_free; | |
4200 | ||
e61fbfca VT |
4201 | memset(info, 0, sizeof(*info)); |
4202 | ||
aea6a3f0 FF |
4203 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
4204 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
4205 | if (tid_tx) { | |
4206 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
4207 | /* fall back to non-offload slow path */ | |
4208 | __ieee80211_subif_start_xmit(skb, dev, 0, 0, NULL); | |
4209 | return; | |
96ae9cd0 | 4210 | } |
aea6a3f0 FF |
4211 | |
4212 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
4213 | if (tid_tx->timeout) | |
4214 | tid_tx->last_tx = jiffies; | |
96ae9cd0 FF |
4215 | } |
4216 | ||
aea6a3f0 | 4217 | if (unlikely(skb->sk && |
50ff477a | 4218 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) |
e61fbfca VT |
4219 | info->ack_frame_id = ieee80211_store_ack_skb(local, skb, |
4220 | &info->flags, NULL); | |
50ff477a | 4221 | |
50ff477a JC |
4222 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; |
4223 | ||
36ec144f | 4224 | dev_sw_netstats_tx_add(dev, 1, skb->len); |
50ff477a | 4225 | |
aea6a3f0 FF |
4226 | sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; |
4227 | sta->tx_stats.packets[skb_get_queue_mapping(skb)]++; | |
50ff477a JC |
4228 | |
4229 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
4230 | sdata = container_of(sdata->bss, | |
4231 | struct ieee80211_sub_if_data, u.ap); | |
4232 | ||
cc20ff2c | 4233 | info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP; |
50ff477a JC |
4234 | info->control.vif = &sdata->vif; |
4235 | ||
ae045152 FF |
4236 | if (key) |
4237 | info->control.hw_key = &key->conf; | |
4238 | ||
50ff477a JC |
4239 | ieee80211_tx_8023(sdata, skb, skb->len, sta, false); |
4240 | ||
4241 | return; | |
4242 | ||
4243 | out_free: | |
4244 | kfree_skb(skb); | |
4245 | } | |
4246 | ||
4247 | netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb, | |
4248 | struct net_device *dev) | |
4249 | { | |
4250 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
aea6a3f0 | 4251 | struct ethhdr *ehdr = (struct ethhdr *)skb->data; |
6aea26ce | 4252 | struct ieee80211_key *key; |
50ff477a | 4253 | struct sta_info *sta; |
6aea26ce | 4254 | bool offload = true; |
50ff477a JC |
4255 | |
4256 | if (unlikely(skb->len < ETH_HLEN)) { | |
4257 | kfree_skb(skb); | |
4258 | return NETDEV_TX_OK; | |
4259 | } | |
4260 | ||
4261 | rcu_read_lock(); | |
4262 | ||
6aea26ce | 4263 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
50ff477a | 4264 | kfree_skb(skb); |
6aea26ce FF |
4265 | goto out; |
4266 | } | |
4267 | ||
4268 | if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded || | |
4269 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
4270 | sdata->control_port_protocol == ehdr->h_proto)) | |
4271 | offload = false; | |
4272 | else if ((key = rcu_dereference(sta->ptk[sta->ptk_idx])) && | |
4273 | (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) || | |
4274 | key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)) | |
4275 | offload = false; | |
4276 | ||
4277 | if (offload) | |
4278 | ieee80211_8023_xmit(sdata, dev, sta, key, skb); | |
50ff477a | 4279 | else |
6aea26ce | 4280 | ieee80211_subif_start_xmit(skb, dev); |
50ff477a | 4281 | |
6aea26ce | 4282 | out: |
50ff477a JC |
4283 | rcu_read_unlock(); |
4284 | ||
4285 | return NETDEV_TX_OK; | |
4286 | } | |
4287 | ||
7528ec57 JB |
4288 | struct sk_buff * |
4289 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
4290 | struct sk_buff *skb, u32 info_flags) | |
4291 | { | |
4292 | struct ieee80211_hdr *hdr; | |
4293 | struct ieee80211_tx_data tx = { | |
4294 | .local = sdata->local, | |
4295 | .sdata = sdata, | |
4296 | }; | |
97ffe757 | 4297 | struct sta_info *sta; |
7528ec57 JB |
4298 | |
4299 | rcu_read_lock(); | |
4300 | ||
97ffe757 JB |
4301 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
4302 | kfree_skb(skb); | |
4303 | skb = ERR_PTR(-EINVAL); | |
4304 | goto out; | |
4305 | } | |
4306 | ||
a7528198 | 4307 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta, 0, NULL); |
7528ec57 JB |
4308 | if (IS_ERR(skb)) |
4309 | goto out; | |
4310 | ||
4311 | hdr = (void *)skb->data; | |
4312 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
4313 | tx.skb = skb; | |
4314 | ||
4315 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
4316 | rcu_read_unlock(); | |
4317 | kfree_skb(skb); | |
4318 | return ERR_PTR(-EINVAL); | |
4319 | } | |
4320 | ||
4321 | out: | |
4322 | rcu_read_unlock(); | |
4323 | return skb; | |
4324 | } | |
4325 | ||
e2530083 JB |
4326 | /* |
4327 | * ieee80211_clear_tx_pending may not be called in a context where | |
4328 | * it is possible that it packets could come in again. | |
4329 | */ | |
e2ebc74d JB |
4330 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
4331 | { | |
1f98ab7f | 4332 | struct sk_buff *skb; |
2de8e0d9 | 4333 | int i; |
e2ebc74d | 4334 | |
1f98ab7f FF |
4335 | for (i = 0; i < local->hw.queues; i++) { |
4336 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
4337 | ieee80211_free_txskb(&local->hw, skb); | |
4338 | } | |
e2ebc74d JB |
4339 | } |
4340 | ||
7bb45683 JB |
4341 | /* |
4342 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
4343 | * which in this case means re-queued -- take as an indication to stop sending | |
4344 | * more pending frames. | |
4345 | */ | |
cd8ffc80 JB |
4346 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
4347 | struct sk_buff *skb) | |
4348 | { | |
4349 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
4350 | struct ieee80211_sub_if_data *sdata; | |
4351 | struct sta_info *sta; | |
4352 | struct ieee80211_hdr *hdr; | |
7bb45683 | 4353 | bool result; |
55de908a | 4354 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 4355 | |
5061b0c2 | 4356 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 | 4357 | |
cc20ff2c | 4358 | if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) { |
55de908a JB |
4359 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4360 | if (unlikely(!chanctx_conf)) { | |
4361 | dev_kfree_skb(skb); | |
4362 | return true; | |
4363 | } | |
73c4e195 | 4364 | info->band = chanctx_conf->def.chan->band; |
08aca29a | 4365 | result = ieee80211_tx(sdata, NULL, skb, true); |
cc20ff2c | 4366 | } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) { |
50ff477a JC |
4367 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
4368 | dev_kfree_skb(skb); | |
4369 | return true; | |
4370 | } | |
4371 | ||
4372 | if (IS_ERR(sta) || (sta && !sta->uploaded)) | |
4373 | sta = NULL; | |
4374 | ||
4375 | result = ieee80211_tx_8023(sdata, skb, skb->len, sta, true); | |
cd8ffc80 | 4376 | } else { |
252b86c4 JB |
4377 | struct sk_buff_head skbs; |
4378 | ||
4379 | __skb_queue_head_init(&skbs); | |
4380 | __skb_queue_tail(&skbs, skb); | |
4381 | ||
cd8ffc80 | 4382 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 4383 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 4384 | |
74e4dbfd | 4385 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
4386 | } |
4387 | ||
cd8ffc80 JB |
4388 | return result; |
4389 | } | |
4390 | ||
e2530083 | 4391 | /* |
3b8d81e0 | 4392 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 4393 | */ |
da1cad73 | 4394 | void ieee80211_tx_pending(struct tasklet_struct *t) |
e2ebc74d | 4395 | { |
da1cad73 AP |
4396 | struct ieee80211_local *local = from_tasklet(local, t, |
4397 | tx_pending_tasklet); | |
2a577d98 | 4398 | unsigned long flags; |
cd8ffc80 | 4399 | int i; |
3b8d81e0 | 4400 | bool txok; |
e2ebc74d | 4401 | |
f0e72851 | 4402 | rcu_read_lock(); |
e2530083 | 4403 | |
3b8d81e0 | 4404 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
4405 | for (i = 0; i < local->hw.queues; i++) { |
4406 | /* | |
4407 | * If queue is stopped by something other than due to pending | |
4408 | * frames, or we have no pending frames, proceed to next queue. | |
4409 | */ | |
3b8d81e0 | 4410 | if (local->queue_stop_reasons[i] || |
2a577d98 | 4411 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 4412 | continue; |
e2530083 | 4413 | |
2a577d98 | 4414 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 4415 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 4416 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 4417 | |
a7bc376c | 4418 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 4419 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
4420 | continue; |
4421 | } | |
4422 | ||
3b8d81e0 JB |
4423 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
4424 | flags); | |
4425 | ||
4426 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
4427 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
4428 | flags); | |
4429 | if (!txok) | |
2a577d98 | 4430 | break; |
e2ebc74d | 4431 | } |
7236fe29 JB |
4432 | |
4433 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 4434 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 4435 | } |
3b8d81e0 | 4436 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 4437 | |
f0e72851 | 4438 | rcu_read_unlock(); |
e2ebc74d JB |
4439 | } |
4440 | ||
4441 | /* functions for drivers to get certain frames */ | |
4442 | ||
eac70c13 | 4443 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
4444 | struct ps_data *ps, struct sk_buff *skb, |
4445 | bool is_template) | |
e2ebc74d JB |
4446 | { |
4447 | u8 *pos, *tim; | |
4448 | int aid0 = 0; | |
4449 | int i, have_bits = 0, n1, n2; | |
4450 | ||
4451 | /* Generate bitmap for TIM only if there are any STAs in power save | |
4452 | * mode. */ | |
d012a605 | 4453 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
4454 | /* in the hope that this is faster than |
4455 | * checking byte-for-byte */ | |
f359d3fe | 4456 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 4457 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
4458 | if (!is_template) { |
4459 | if (ps->dtim_count == 0) | |
4460 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
4461 | else | |
4462 | ps->dtim_count--; | |
4463 | } | |
e2ebc74d | 4464 | |
4df864c1 | 4465 | tim = pos = skb_put(skb, 6); |
e2ebc74d JB |
4466 | *pos++ = WLAN_EID_TIM; |
4467 | *pos++ = 4; | |
d012a605 | 4468 | *pos++ = ps->dtim_count; |
8860020e | 4469 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 4470 | |
d012a605 | 4471 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
4472 | aid0 = 1; |
4473 | ||
d012a605 | 4474 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 4475 | |
e2ebc74d JB |
4476 | if (have_bits) { |
4477 | /* Find largest even number N1 so that bits numbered 1 through | |
4478 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
4479 | * (N2 + 1) x 8 through 2007 are 0. */ | |
4480 | n1 = 0; | |
4481 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 4482 | if (ps->tim[i]) { |
e2ebc74d JB |
4483 | n1 = i & 0xfe; |
4484 | break; | |
4485 | } | |
4486 | } | |
4487 | n2 = n1; | |
4488 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 4489 | if (ps->tim[i]) { |
e2ebc74d JB |
4490 | n2 = i; |
4491 | break; | |
4492 | } | |
4493 | } | |
4494 | ||
4495 | /* Bitmap control */ | |
4496 | *pos++ = n1 | aid0; | |
4497 | /* Part Virt Bitmap */ | |
5220da39 | 4498 | skb_put(skb, n2 - n1); |
d012a605 | 4499 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
4500 | |
4501 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
4502 | } else { |
4503 | *pos++ = aid0; /* Bitmap control */ | |
4504 | *pos++ = 0; /* Part Virt Bitmap */ | |
4505 | } | |
e2ebc74d JB |
4506 | } |
4507 | ||
eac70c13 | 4508 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
4509 | struct ps_data *ps, struct sk_buff *skb, |
4510 | bool is_template) | |
eac70c13 MP |
4511 | { |
4512 | struct ieee80211_local *local = sdata->local; | |
4513 | ||
4514 | /* | |
4515 | * Not very nice, but we want to allow the driver to call | |
4516 | * ieee80211_beacon_get() as a response to the set_tim() | |
4517 | * callback. That, however, is already invoked under the | |
4518 | * sta_lock to guarantee consistent and race-free update | |
4519 | * of the tim bitmap in mac80211 and the driver. | |
4520 | */ | |
4521 | if (local->tim_in_locked_section) { | |
6ec8c332 | 4522 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 4523 | } else { |
1b91731d | 4524 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 4525 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 4526 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
4527 | } |
4528 | ||
4529 | return 0; | |
4530 | } | |
4531 | ||
8552a434 JC |
4532 | static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata, |
4533 | struct beacon_data *beacon) | |
73da7d5b SW |
4534 | { |
4535 | struct probe_resp *resp; | |
cd7760e6 SW |
4536 | u8 *beacon_data; |
4537 | size_t beacon_data_len; | |
0d06d9ba | 4538 | int i; |
8552a434 | 4539 | u8 count = beacon->cntdwn_current_counter; |
cd7760e6 SW |
4540 | |
4541 | switch (sdata->vif.type) { | |
4542 | case NL80211_IFTYPE_AP: | |
4543 | beacon_data = beacon->tail; | |
4544 | beacon_data_len = beacon->tail_len; | |
4545 | break; | |
4546 | case NL80211_IFTYPE_ADHOC: | |
4547 | beacon_data = beacon->head; | |
4548 | beacon_data_len = beacon->head_len; | |
4549 | break; | |
b8456a14 CYY |
4550 | case NL80211_IFTYPE_MESH_POINT: |
4551 | beacon_data = beacon->head; | |
4552 | beacon_data_len = beacon->head_len; | |
4553 | break; | |
cd7760e6 SW |
4554 | default: |
4555 | return; | |
4556 | } | |
73da7d5b | 4557 | |
af296bdb | 4558 | rcu_read_lock(); |
8552a434 | 4559 | for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; ++i) { |
af296bdb | 4560 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 4561 | |
8552a434 JC |
4562 | if (beacon->cntdwn_counter_offsets[i]) { |
4563 | if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[i] >= | |
af296bdb | 4564 | beacon_data_len)) { |
0d06d9ba AO |
4565 | rcu_read_unlock(); |
4566 | return; | |
4567 | } | |
af296bdb | 4568 | |
8552a434 | 4569 | beacon_data[beacon->cntdwn_counter_offsets[i]] = count; |
73da7d5b | 4570 | } |
af296bdb MK |
4571 | |
4572 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
8552a434 | 4573 | resp->data[resp->cntdwn_counter_offsets[i]] = count; |
73da7d5b | 4574 | } |
af296bdb | 4575 | rcu_read_unlock(); |
1af586c9 AO |
4576 | } |
4577 | ||
8552a434 | 4578 | static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon) |
e996ec2a | 4579 | { |
8552a434 | 4580 | beacon->cntdwn_current_counter--; |
e996ec2a WD |
4581 | |
4582 | /* the counter should never reach 0 */ | |
8552a434 | 4583 | WARN_ON_ONCE(!beacon->cntdwn_current_counter); |
e996ec2a | 4584 | |
8552a434 | 4585 | return beacon->cntdwn_current_counter; |
e996ec2a WD |
4586 | } |
4587 | ||
8552a434 | 4588 | u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif) |
1af586c9 AO |
4589 | { |
4590 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
4591 | struct beacon_data *beacon = NULL; |
4592 | u8 count = 0; | |
0d06d9ba | 4593 | |
af296bdb MK |
4594 | rcu_read_lock(); |
4595 | ||
4596 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4597 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4598 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4599 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4600 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4601 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4602 | ||
4603 | if (!beacon) | |
4604 | goto unlock; | |
4605 | ||
8552a434 | 4606 | count = __ieee80211_beacon_update_cntdwn(beacon); |
1af586c9 | 4607 | |
af296bdb MK |
4608 | unlock: |
4609 | rcu_read_unlock(); | |
4610 | return count; | |
73da7d5b | 4611 | } |
8552a434 | 4612 | EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn); |
73da7d5b | 4613 | |
8552a434 | 4614 | void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter) |
03737001 GG |
4615 | { |
4616 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4617 | struct beacon_data *beacon = NULL; | |
4618 | ||
4619 | rcu_read_lock(); | |
4620 | ||
4621 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4622 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4623 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4624 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4625 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4626 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4627 | ||
4628 | if (!beacon) | |
4629 | goto unlock; | |
4630 | ||
8552a434 JC |
4631 | if (counter < beacon->cntdwn_current_counter) |
4632 | beacon->cntdwn_current_counter = counter; | |
03737001 GG |
4633 | |
4634 | unlock: | |
4635 | rcu_read_unlock(); | |
4636 | } | |
8552a434 | 4637 | EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn); |
03737001 | 4638 | |
8552a434 | 4639 | bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif) |
73da7d5b SW |
4640 | { |
4641 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4642 | struct beacon_data *beacon = NULL; | |
4643 | u8 *beacon_data; | |
4644 | size_t beacon_data_len; | |
73da7d5b SW |
4645 | int ret = false; |
4646 | ||
4647 | if (!ieee80211_sdata_running(sdata)) | |
4648 | return false; | |
4649 | ||
4650 | rcu_read_lock(); | |
4651 | if (vif->type == NL80211_IFTYPE_AP) { | |
4652 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
4653 | ||
4654 | beacon = rcu_dereference(ap->beacon); | |
4655 | if (WARN_ON(!beacon || !beacon->tail)) | |
4656 | goto out; | |
4657 | beacon_data = beacon->tail; | |
4658 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
4659 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
4660 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
4661 | ||
4662 | beacon = rcu_dereference(ifibss->presp); | |
4663 | if (!beacon) | |
4664 | goto out; | |
4665 | ||
b8456a14 CYY |
4666 | beacon_data = beacon->head; |
4667 | beacon_data_len = beacon->head_len; | |
4668 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
4669 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
4670 | ||
4671 | beacon = rcu_dereference(ifmsh->beacon); | |
4672 | if (!beacon) | |
4673 | goto out; | |
4674 | ||
cd7760e6 SW |
4675 | beacon_data = beacon->head; |
4676 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
4677 | } else { |
4678 | WARN_ON(1); | |
4679 | goto out; | |
4680 | } | |
4681 | ||
8552a434 | 4682 | if (!beacon->cntdwn_counter_offsets[0]) |
10d78f27 MK |
4683 | goto out; |
4684 | ||
8552a434 | 4685 | if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
4686 | goto out; |
4687 | ||
8552a434 | 4688 | if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1) |
73da7d5b | 4689 | ret = true; |
8552a434 | 4690 | |
73da7d5b SW |
4691 | out: |
4692 | rcu_read_unlock(); | |
4693 | ||
4694 | return ret; | |
4695 | } | |
8552a434 | 4696 | EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete); |
73da7d5b | 4697 | |
0a3a8436 JM |
4698 | static int ieee80211_beacon_protect(struct sk_buff *skb, |
4699 | struct ieee80211_local *local, | |
4700 | struct ieee80211_sub_if_data *sdata) | |
4701 | { | |
4702 | ieee80211_tx_result res; | |
4703 | struct ieee80211_tx_data tx; | |
95247705 | 4704 | struct sk_buff *check_skb; |
0a3a8436 JM |
4705 | |
4706 | memset(&tx, 0, sizeof(tx)); | |
4707 | tx.key = rcu_dereference(sdata->default_beacon_key); | |
4708 | if (!tx.key) | |
4709 | return 0; | |
4710 | tx.local = local; | |
4711 | tx.sdata = sdata; | |
4712 | __skb_queue_head_init(&tx.skbs); | |
4713 | __skb_queue_tail(&tx.skbs, skb); | |
4714 | res = ieee80211_tx_h_encrypt(&tx); | |
95247705 JB |
4715 | check_skb = __skb_dequeue(&tx.skbs); |
4716 | /* we may crash after this, but it'd be a bug in crypto */ | |
4717 | WARN_ON(check_skb != skb); | |
0a3a8436 | 4718 | if (WARN_ON_ONCE(res != TX_CONTINUE)) |
95247705 | 4719 | return -EINVAL; |
0a3a8436 JM |
4720 | |
4721 | return 0; | |
4722 | } | |
4723 | ||
6ec8c332 AO |
4724 | static struct sk_buff * |
4725 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
4726 | struct ieee80211_vif *vif, | |
4727 | struct ieee80211_mutable_offsets *offs, | |
4728 | bool is_template) | |
e2ebc74d JB |
4729 | { |
4730 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 4731 | struct beacon_data *beacon = NULL; |
9d139c81 | 4732 | struct sk_buff *skb = NULL; |
e039fa4a | 4733 | struct ieee80211_tx_info *info; |
e2ebc74d | 4734 | struct ieee80211_sub_if_data *sdata = NULL; |
57fbcce3 | 4735 | enum nl80211_band band; |
e00cfce0 | 4736 | struct ieee80211_tx_rate_control txrc; |
55de908a | 4737 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 4738 | int csa_off_base = 0; |
8318d78a | 4739 | |
5dfdaf58 | 4740 | rcu_read_lock(); |
e2ebc74d | 4741 | |
32bfd35d | 4742 | sdata = vif_to_sdata(vif); |
55de908a | 4743 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 4744 | |
55de908a | 4745 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
4746 | goto out; |
4747 | ||
6ec8c332 AO |
4748 | if (offs) |
4749 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 4750 | |
05c914fe | 4751 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 4752 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 4753 | |
af296bdb | 4754 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 4755 | if (beacon) { |
8552a434 | 4756 | if (beacon->cntdwn_counter_offsets[0]) { |
1af586c9 | 4757 | if (!is_template) |
8552a434 | 4758 | ieee80211_beacon_update_cntdwn(vif); |
1af586c9 | 4759 | |
8552a434 | 4760 | ieee80211_set_beacon_cntdwn(sdata, beacon); |
1af586c9 | 4761 | } |
73da7d5b | 4762 | |
902acc78 JB |
4763 | /* |
4764 | * headroom, head length, | |
4765 | * tail length and maximum TIM length | |
4766 | */ | |
4767 | skb = dev_alloc_skb(local->tx_headroom + | |
4768 | beacon->head_len + | |
70dabeb7 FF |
4769 | beacon->tail_len + 256 + |
4770 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
4771 | if (!skb) |
4772 | goto out; | |
33b64eb2 | 4773 | |
902acc78 | 4774 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 4775 | skb_put_data(skb, beacon->head, beacon->head_len); |
33b64eb2 | 4776 | |
6ec8c332 AO |
4777 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
4778 | is_template); | |
33b64eb2 | 4779 | |
6ec8c332 AO |
4780 | if (offs) { |
4781 | offs->tim_offset = beacon->head_len; | |
4782 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
4783 | |
4784 | /* for AP the csa offsets are from tail */ | |
4785 | csa_off_base = skb->len; | |
6ec8c332 | 4786 | } |
eddcbb94 | 4787 | |
902acc78 | 4788 | if (beacon->tail) |
59ae1d12 JB |
4789 | skb_put_data(skb, beacon->tail, |
4790 | beacon->tail_len); | |
0a3a8436 JM |
4791 | |
4792 | if (ieee80211_beacon_protect(skb, local, sdata) < 0) | |
4793 | goto out; | |
9d139c81 JB |
4794 | } else |
4795 | goto out; | |
05c914fe | 4796 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 4797 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 4798 | struct ieee80211_hdr *hdr; |
33b64eb2 | 4799 | |
af296bdb MK |
4800 | beacon = rcu_dereference(ifibss->presp); |
4801 | if (!beacon) | |
9d139c81 JB |
4802 | goto out; |
4803 | ||
8552a434 | 4804 | if (beacon->cntdwn_counter_offsets[0]) { |
1af586c9 | 4805 | if (!is_template) |
8552a434 | 4806 | __ieee80211_beacon_update_cntdwn(beacon); |
cd7760e6 | 4807 | |
8552a434 | 4808 | ieee80211_set_beacon_cntdwn(sdata, beacon); |
1af586c9 | 4809 | } |
cd7760e6 | 4810 | |
af296bdb | 4811 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 4812 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
4813 | if (!skb) |
4814 | goto out; | |
c3ffeab4 | 4815 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 4816 | skb_put_data(skb, beacon->head, beacon->head_len); |
9d139c81 JB |
4817 | |
4818 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
4819 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
4820 | IEEE80211_STYPE_BEACON); | |
902acc78 | 4821 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 4822 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 4823 | |
af296bdb MK |
4824 | beacon = rcu_dereference(ifmsh->beacon); |
4825 | if (!beacon) | |
ac1bd846 | 4826 | goto out; |
ac1bd846 | 4827 | |
8552a434 | 4828 | if (beacon->cntdwn_counter_offsets[0]) { |
1af586c9 AO |
4829 | if (!is_template) |
4830 | /* TODO: For mesh csa_counter is in TU, so | |
4831 | * decrementing it by one isn't correct, but | |
4832 | * for now we leave it consistent with overall | |
4833 | * mac80211's behavior. | |
4834 | */ | |
8552a434 | 4835 | __ieee80211_beacon_update_cntdwn(beacon); |
1af586c9 | 4836 | |
8552a434 | 4837 | ieee80211_set_beacon_cntdwn(sdata, beacon); |
1af586c9 | 4838 | } |
b8456a14 | 4839 | |
dbf498fb | 4840 | if (ifmsh->sync_ops) |
445cd452 | 4841 | ifmsh->sync_ops->adjust_tsf(sdata, beacon); |
dbf498fb | 4842 | |
3b69a9c5 | 4843 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 4844 | beacon->head_len + |
3f52b7e3 | 4845 | 256 + /* TIM IE */ |
af296bdb | 4846 | beacon->tail_len + |
70dabeb7 | 4847 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
4848 | if (!skb) |
4849 | goto out; | |
2b5e1967 | 4850 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 4851 | skb_put_data(skb, beacon->head, beacon->head_len); |
6ec8c332 AO |
4852 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
4853 | ||
4854 | if (offs) { | |
af296bdb MK |
4855 | offs->tim_offset = beacon->head_len; |
4856 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
4857 | } |
4858 | ||
59ae1d12 | 4859 | skb_put_data(skb, beacon->tail, beacon->tail_len); |
9d139c81 JB |
4860 | } else { |
4861 | WARN_ON(1); | |
5dfdaf58 | 4862 | goto out; |
e2ebc74d JB |
4863 | } |
4864 | ||
1af586c9 | 4865 | /* CSA offsets */ |
af296bdb | 4866 | if (offs && beacon) { |
1af586c9 AO |
4867 | int i; |
4868 | ||
8552a434 JC |
4869 | for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) { |
4870 | u16 csa_off = beacon->cntdwn_counter_offsets[i]; | |
1af586c9 AO |
4871 | |
4872 | if (!csa_off) | |
4873 | continue; | |
4874 | ||
8552a434 | 4875 | offs->cntdwn_counter_offs[i] = csa_off_base + csa_off; |
1af586c9 AO |
4876 | } |
4877 | } | |
4878 | ||
4bf88530 | 4879 | band = chanctx_conf->def.chan->band; |
55de908a | 4880 | |
e039fa4a JB |
4881 | info = IEEE80211_SKB_CB(skb); |
4882 | ||
3b8d81e0 | 4883 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 4884 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 4885 | info->band = band; |
e00cfce0 JM |
4886 | |
4887 | memset(&txrc, 0, sizeof(txrc)); | |
4888 | txrc.hw = hw; | |
e31583cd | 4889 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
4890 | txrc.bss_conf = &sdata->vif.bss_conf; |
4891 | txrc.skb = skb; | |
4892 | txrc.reported_rate.idx = -1; | |
08fad438 JM |
4893 | if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band]) |
4894 | txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band]; | |
4895 | else | |
4896 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; | |
8f0729b1 | 4897 | txrc.bss = true; |
e00cfce0 | 4898 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
4899 | |
4900 | info->control.vif = vif; | |
f591fa5d | 4901 | |
a472e71b JL |
4902 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
4903 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
4904 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 4905 | out: |
5dfdaf58 | 4906 | rcu_read_unlock(); |
e2ebc74d | 4907 | return skb; |
6ec8c332 AO |
4908 | |
4909 | } | |
4910 | ||
4911 | struct sk_buff * | |
4912 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
4913 | struct ieee80211_vif *vif, | |
4914 | struct ieee80211_mutable_offsets *offs) | |
4915 | { | |
4916 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
4917 | } | |
4918 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
4919 | ||
4920 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
4921 | struct ieee80211_vif *vif, | |
4922 | u16 *tim_offset, u16 *tim_length) | |
4923 | { | |
4924 | struct ieee80211_mutable_offsets offs = {}; | |
4925 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
35afa588 HS |
4926 | struct sk_buff *copy; |
4927 | struct ieee80211_supported_band *sband; | |
4928 | int shift; | |
4929 | ||
4930 | if (!bcn) | |
4931 | return bcn; | |
6ec8c332 AO |
4932 | |
4933 | if (tim_offset) | |
4934 | *tim_offset = offs.tim_offset; | |
4935 | ||
4936 | if (tim_length) | |
4937 | *tim_length = offs.tim_length; | |
4938 | ||
35afa588 HS |
4939 | if (ieee80211_hw_check(hw, BEACON_TX_STATUS) || |
4940 | !hw_to_local(hw)->monitors) | |
4941 | return bcn; | |
4942 | ||
4943 | /* send a copy to monitor interfaces */ | |
4944 | copy = skb_copy(bcn, GFP_ATOMIC); | |
4945 | if (!copy) | |
4946 | return bcn; | |
4947 | ||
4948 | shift = ieee80211_vif_get_shift(vif); | |
21a8e9dd MSS |
4949 | sband = ieee80211_get_sband(vif_to_sdata(vif)); |
4950 | if (!sband) | |
4951 | return bcn; | |
4952 | ||
b7b2e8ca JC |
4953 | ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false, |
4954 | NULL); | |
35afa588 | 4955 | |
6ec8c332 | 4956 | return bcn; |
e2ebc74d | 4957 | } |
eddcbb94 | 4958 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 4959 | |
02945821 AN |
4960 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
4961 | struct ieee80211_vif *vif) | |
4962 | { | |
4963 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
4964 | struct sk_buff *skb = NULL; |
4965 | struct probe_resp *presp = NULL; | |
02945821 AN |
4966 | struct ieee80211_hdr *hdr; |
4967 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4968 | ||
4969 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
4970 | return NULL; | |
4971 | ||
4972 | rcu_read_lock(); | |
4973 | ||
4974 | ap = &sdata->u.ap; | |
4975 | presp = rcu_dereference(ap->probe_resp); | |
4976 | if (!presp) | |
4977 | goto out; | |
4978 | ||
aa7a0080 | 4979 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
4980 | if (!skb) |
4981 | goto out; | |
4982 | ||
59ae1d12 | 4983 | skb_put_data(skb, presp->data, presp->len); |
aa7a0080 | 4984 | |
02945821 AN |
4985 | hdr = (struct ieee80211_hdr *) skb->data; |
4986 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
4987 | ||
4988 | out: | |
4989 | rcu_read_unlock(); | |
4990 | return skb; | |
4991 | } | |
4992 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
4993 | ||
295b02c4 AD |
4994 | struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw, |
4995 | struct ieee80211_vif *vif) | |
4996 | { | |
4997 | struct sk_buff *skb = NULL; | |
4998 | struct fils_discovery_data *tmpl = NULL; | |
4999 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
5000 | ||
5001 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
5002 | return NULL; | |
5003 | ||
5004 | rcu_read_lock(); | |
5005 | tmpl = rcu_dereference(sdata->u.ap.fils_discovery); | |
5006 | if (!tmpl) { | |
5007 | rcu_read_unlock(); | |
5008 | return NULL; | |
5009 | } | |
5010 | ||
5011 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len); | |
5012 | if (skb) { | |
5013 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); | |
5014 | skb_put_data(skb, tmpl->data, tmpl->len); | |
5015 | } | |
5016 | ||
5017 | rcu_read_unlock(); | |
5018 | return skb; | |
5019 | } | |
5020 | EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl); | |
5021 | ||
632189a0 AD |
5022 | struct sk_buff * |
5023 | ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw, | |
5024 | struct ieee80211_vif *vif) | |
5025 | { | |
5026 | struct sk_buff *skb = NULL; | |
5027 | struct unsol_bcast_probe_resp_data *tmpl = NULL; | |
5028 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
5029 | ||
5030 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
5031 | return NULL; | |
5032 | ||
5033 | rcu_read_lock(); | |
5034 | tmpl = rcu_dereference(sdata->u.ap.unsol_bcast_probe_resp); | |
5035 | if (!tmpl) { | |
5036 | rcu_read_unlock(); | |
5037 | return NULL; | |
5038 | } | |
5039 | ||
5040 | skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len); | |
5041 | if (skb) { | |
5042 | skb_reserve(skb, sdata->local->hw.extra_tx_headroom); | |
5043 | skb_put_data(skb, tmpl->data, tmpl->len); | |
5044 | } | |
5045 | ||
5046 | rcu_read_unlock(); | |
5047 | return skb; | |
5048 | } | |
5049 | EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl); | |
5050 | ||
7044cc56 KV |
5051 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
5052 | struct ieee80211_vif *vif) | |
5053 | { | |
5054 | struct ieee80211_sub_if_data *sdata; | |
5055 | struct ieee80211_if_managed *ifmgd; | |
5056 | struct ieee80211_pspoll *pspoll; | |
5057 | struct ieee80211_local *local; | |
5058 | struct sk_buff *skb; | |
5059 | ||
5060 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
5061 | return NULL; | |
5062 | ||
5063 | sdata = vif_to_sdata(vif); | |
5064 | ifmgd = &sdata->u.mgd; | |
5065 | local = sdata->local; | |
5066 | ||
5067 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 5068 | if (!skb) |
7044cc56 | 5069 | return NULL; |
d15b8459 | 5070 | |
7044cc56 KV |
5071 | skb_reserve(skb, local->hw.extra_tx_headroom); |
5072 | ||
b080db58 | 5073 | pspoll = skb_put_zero(skb, sizeof(*pspoll)); |
7044cc56 KV |
5074 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
5075 | IEEE80211_STYPE_PSPOLL); | |
1db364c8 | 5076 | pspoll->aid = cpu_to_le16(sdata->vif.bss_conf.aid); |
7044cc56 KV |
5077 | |
5078 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
5079 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
5080 | ||
5081 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
5082 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
5083 | ||
5084 | return skb; | |
5085 | } | |
5086 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
5087 | ||
5088 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
7b6ddeaf JB |
5089 | struct ieee80211_vif *vif, |
5090 | bool qos_ok) | |
7044cc56 KV |
5091 | { |
5092 | struct ieee80211_hdr_3addr *nullfunc; | |
5093 | struct ieee80211_sub_if_data *sdata; | |
5094 | struct ieee80211_if_managed *ifmgd; | |
5095 | struct ieee80211_local *local; | |
5096 | struct sk_buff *skb; | |
7b6ddeaf | 5097 | bool qos = false; |
7044cc56 KV |
5098 | |
5099 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
5100 | return NULL; | |
5101 | ||
5102 | sdata = vif_to_sdata(vif); | |
5103 | ifmgd = &sdata->u.mgd; | |
5104 | local = sdata->local; | |
5105 | ||
7b6ddeaf JB |
5106 | if (qos_ok) { |
5107 | struct sta_info *sta; | |
5108 | ||
5109 | rcu_read_lock(); | |
5110 | sta = sta_info_get(sdata, ifmgd->bssid); | |
5111 | qos = sta && sta->sta.wme; | |
5112 | rcu_read_unlock(); | |
5113 | } | |
5114 | ||
5115 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
5116 | sizeof(*nullfunc) + 2); | |
d15b8459 | 5117 | if (!skb) |
7044cc56 | 5118 | return NULL; |
d15b8459 | 5119 | |
7044cc56 KV |
5120 | skb_reserve(skb, local->hw.extra_tx_headroom); |
5121 | ||
b080db58 | 5122 | nullfunc = skb_put_zero(skb, sizeof(*nullfunc)); |
7044cc56 KV |
5123 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | |
5124 | IEEE80211_STYPE_NULLFUNC | | |
5125 | IEEE80211_FCTL_TODS); | |
7b6ddeaf | 5126 | if (qos) { |
e0ba7095 | 5127 | __le16 qoshdr = cpu_to_le16(7); |
7b6ddeaf JB |
5128 | |
5129 | BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC | | |
5130 | IEEE80211_STYPE_NULLFUNC) != | |
5131 | IEEE80211_STYPE_QOS_NULLFUNC); | |
5132 | nullfunc->frame_control |= | |
5133 | cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC); | |
5134 | skb->priority = 7; | |
5135 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
e0ba7095 | 5136 | skb_put_data(skb, &qoshdr, sizeof(qoshdr)); |
7b6ddeaf JB |
5137 | } |
5138 | ||
7044cc56 KV |
5139 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); |
5140 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
5141 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
5142 | ||
5143 | return skb; | |
5144 | } | |
5145 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
5146 | ||
05e54ea6 | 5147 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 5148 | const u8 *src_addr, |
05e54ea6 | 5149 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 5150 | size_t tailroom) |
05e54ea6 | 5151 | { |
a344d677 | 5152 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
5153 | struct ieee80211_hdr_3addr *hdr; |
5154 | struct sk_buff *skb; | |
5155 | size_t ie_ssid_len; | |
5156 | u8 *pos; | |
5157 | ||
05e54ea6 KV |
5158 | ie_ssid_len = 2 + ssid_len; |
5159 | ||
5160 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 5161 | ie_ssid_len + tailroom); |
d15b8459 | 5162 | if (!skb) |
05e54ea6 | 5163 | return NULL; |
05e54ea6 KV |
5164 | |
5165 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
5166 | ||
b080db58 | 5167 | hdr = skb_put_zero(skb, sizeof(*hdr)); |
05e54ea6 KV |
5168 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
5169 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 5170 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 5171 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 5172 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
5173 | |
5174 | pos = skb_put(skb, ie_ssid_len); | |
5175 | *pos++ = WLAN_EID_SSID; | |
5176 | *pos++ = ssid_len; | |
88c868c4 | 5177 | if (ssid_len) |
05e54ea6 KV |
5178 | memcpy(pos, ssid, ssid_len); |
5179 | pos += ssid_len; | |
5180 | ||
05e54ea6 KV |
5181 | return skb; |
5182 | } | |
5183 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
5184 | ||
32bfd35d | 5185 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 5186 | const void *frame, size_t frame_len, |
e039fa4a | 5187 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
5188 | struct ieee80211_rts *rts) |
5189 | { | |
5190 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 5191 | |
065e9605 HH |
5192 | rts->frame_control = |
5193 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
5194 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
5195 | frame_txctl); | |
e2ebc74d JB |
5196 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
5197 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
5198 | } | |
5199 | EXPORT_SYMBOL(ieee80211_rts_get); | |
5200 | ||
32bfd35d | 5201 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 5202 | const void *frame, size_t frame_len, |
e039fa4a | 5203 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
5204 | struct ieee80211_cts *cts) |
5205 | { | |
5206 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 5207 | |
065e9605 HH |
5208 | cts->frame_control = |
5209 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
5210 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
5211 | frame_len, frame_txctl); | |
e2ebc74d JB |
5212 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
5213 | } | |
5214 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
5215 | ||
5216 | struct sk_buff * | |
32bfd35d | 5217 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 5218 | struct ieee80211_vif *vif) |
e2ebc74d JB |
5219 | { |
5220 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 5221 | struct sk_buff *skb = NULL; |
5cf121c3 | 5222 | struct ieee80211_tx_data tx; |
e2ebc74d | 5223 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 5224 | struct ps_data *ps; |
e039fa4a | 5225 | struct ieee80211_tx_info *info; |
55de908a | 5226 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 5227 | |
32bfd35d | 5228 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 5229 | |
5dfdaf58 | 5230 | rcu_read_lock(); |
55de908a | 5231 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 5232 | |
d012a605 MP |
5233 | if (!chanctx_conf) |
5234 | goto out; | |
5235 | ||
5236 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
5237 | struct beacon_data *beacon = | |
5238 | rcu_dereference(sdata->u.ap.beacon); | |
5239 | ||
5240 | if (!beacon || !beacon->head) | |
5241 | goto out; | |
5242 | ||
5243 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
5244 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
5245 | ps = &sdata->u.mesh.ps; | |
d012a605 | 5246 | } else { |
747cf5e9 | 5247 | goto out; |
d012a605 | 5248 | } |
5dfdaf58 | 5249 | |
d012a605 | 5250 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 5251 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 5252 | |
e2ebc74d | 5253 | while (1) { |
d012a605 | 5254 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 5255 | if (!skb) |
747cf5e9 | 5256 | goto out; |
e2ebc74d JB |
5257 | local->total_ps_buffered--; |
5258 | ||
d012a605 | 5259 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
5260 | struct ieee80211_hdr *hdr = |
5261 | (struct ieee80211_hdr *) skb->data; | |
5262 | /* more buffered multicast/broadcast frames ==> set | |
5263 | * MoreData flag in IEEE 802.11 header to inform PS | |
5264 | * STAs */ | |
5265 | hdr->frame_control |= | |
5266 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
5267 | } | |
5268 | ||
112c44b2 | 5269 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 5270 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 5271 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d | 5272 | break; |
6b07d9ca | 5273 | ieee80211_free_txskb(hw, skb); |
e2ebc74d | 5274 | } |
e039fa4a JB |
5275 | |
5276 | info = IEEE80211_SKB_CB(skb); | |
5277 | ||
5cf121c3 | 5278 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 5279 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 5280 | |
97b045d6 | 5281 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 5282 | skb = NULL; |
97b045d6 | 5283 | out: |
d0709a65 | 5284 | rcu_read_unlock(); |
e2ebc74d JB |
5285 | |
5286 | return skb; | |
5287 | } | |
5288 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 5289 | |
b6da911b LK |
5290 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
5291 | { | |
5292 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
5293 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
5294 | struct ieee80211_local *local = sdata->local; | |
5295 | int ret; | |
5296 | u32 queues; | |
5297 | ||
5298 | lockdep_assert_held(&local->sta_mtx); | |
5299 | ||
5300 | /* only some cases are supported right now */ | |
5301 | switch (sdata->vif.type) { | |
5302 | case NL80211_IFTYPE_STATION: | |
5303 | case NL80211_IFTYPE_AP: | |
5304 | case NL80211_IFTYPE_AP_VLAN: | |
5305 | break; | |
5306 | default: | |
5307 | WARN_ON(1); | |
5308 | return -EINVAL; | |
5309 | } | |
5310 | ||
5311 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
5312 | return -EINVAL; | |
5313 | ||
5314 | if (sta->reserved_tid == tid) { | |
5315 | ret = 0; | |
5316 | goto out; | |
5317 | } | |
5318 | ||
5319 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
5320 | sdata_err(sdata, "TID reservation already active\n"); | |
5321 | ret = -EALREADY; | |
5322 | goto out; | |
5323 | } | |
5324 | ||
5325 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
5326 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
5327 | ||
5328 | synchronize_net(); | |
5329 | ||
5330 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
30686bf7 | 5331 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) { |
b6da911b LK |
5332 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
5333 | __ieee80211_stop_tx_ba_session(sta, tid, | |
5334 | AGG_STOP_LOCAL_REQUEST); | |
5335 | } | |
5336 | ||
5337 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 5338 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
5339 | |
5340 | sta->reserved_tid = tid; | |
5341 | ||
5342 | ieee80211_wake_vif_queues(local, sdata, | |
5343 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
5344 | ||
30686bf7 | 5345 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) |
b6da911b LK |
5346 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
5347 | ||
5348 | ret = 0; | |
5349 | out: | |
5350 | return ret; | |
5351 | } | |
5352 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
5353 | ||
5354 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
5355 | { | |
5356 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
5357 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
5358 | ||
5359 | lockdep_assert_held(&sdata->local->sta_mtx); | |
5360 | ||
5361 | /* only some cases are supported right now */ | |
5362 | switch (sdata->vif.type) { | |
5363 | case NL80211_IFTYPE_STATION: | |
5364 | case NL80211_IFTYPE_AP: | |
5365 | case NL80211_IFTYPE_AP_VLAN: | |
5366 | break; | |
5367 | default: | |
5368 | WARN_ON(1); | |
5369 | return; | |
5370 | } | |
5371 | ||
5372 | if (tid != sta->reserved_tid) { | |
5373 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
5374 | return; | |
5375 | } | |
5376 | ||
5377 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
5378 | } | |
5379 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
5380 | ||
55de908a JB |
5381 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
5382 | struct sk_buff *skb, int tid, | |
08aca29a | 5383 | enum nl80211_band band) |
3b8d81e0 | 5384 | { |
731977e9 | 5385 | int ac = ieee80211_ac_from_tid(tid); |
3a25a8c8 | 5386 | |
d57a544d | 5387 | skb_reset_mac_header(skb); |
3a25a8c8 | 5388 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 5389 | skb->priority = tid; |
cf0277e7 | 5390 | |
89afe614 JB |
5391 | skb->dev = sdata->dev; |
5392 | ||
3d34deb6 JB |
5393 | /* |
5394 | * The other path calling ieee80211_xmit is from the tasklet, | |
5395 | * and while we can handle concurrent transmissions locking | |
5396 | * requirements are that we do not come into tx with bhs on. | |
5397 | */ | |
5398 | local_bh_disable(); | |
73c4e195 | 5399 | IEEE80211_SKB_CB(skb)->band = band; |
08aca29a | 5400 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 5401 | local_bh_enable(); |
3b8d81e0 | 5402 | } |
91180649 DK |
5403 | |
5404 | int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, | |
5405 | const u8 *buf, size_t len, | |
dca9ca2d MT |
5406 | const u8 *dest, __be16 proto, bool unencrypted, |
5407 | u64 *cookie) | |
91180649 DK |
5408 | { |
5409 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5410 | struct ieee80211_local *local = sdata->local; | |
5411 | struct sk_buff *skb; | |
5412 | struct ethhdr *ehdr; | |
b95d2ccd | 5413 | u32 ctrl_flags = 0; |
a7528198 | 5414 | u32 flags = 0; |
91180649 DK |
5415 | |
5416 | /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE | |
5417 | * or Pre-Authentication | |
5418 | */ | |
5419 | if (proto != sdata->control_port_protocol && | |
5420 | proto != cpu_to_be16(ETH_P_PREAUTH)) | |
5421 | return -EINVAL; | |
5422 | ||
b95d2ccd | 5423 | if (proto == sdata->control_port_protocol) |
5af7fef3 MT |
5424 | ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO | |
5425 | IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP; | |
b95d2ccd | 5426 | |
91180649 | 5427 | if (unencrypted) |
a7528198 MT |
5428 | flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5429 | ||
5430 | if (cookie) | |
5431 | ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
5432 | ||
5433 | flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
5434 | IEEE80211_TX_CTL_INJECTED; | |
91180649 DK |
5435 | |
5436 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
5437 | sizeof(struct ethhdr) + len); | |
5438 | if (!skb) | |
5439 | return -ENOMEM; | |
5440 | ||
5441 | skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr)); | |
5442 | ||
5443 | skb_put_data(skb, buf, len); | |
5444 | ||
5445 | ehdr = skb_push(skb, sizeof(struct ethhdr)); | |
5446 | memcpy(ehdr->h_dest, dest, ETH_ALEN); | |
8079e4fe | 5447 | memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN); |
91180649 DK |
5448 | ehdr->h_proto = proto; |
5449 | ||
5450 | skb->dev = dev; | |
5451 | skb->protocol = htons(ETH_P_802_3); | |
5452 | skb_reset_network_header(skb); | |
5453 | skb_reset_mac_header(skb); | |
5454 | ||
a7528198 MT |
5455 | /* mutex lock is only needed for incrementing the cookie counter */ |
5456 | mutex_lock(&local->mtx); | |
5457 | ||
e7441c92 | 5458 | local_bh_disable(); |
a7528198 | 5459 | __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie); |
e7441c92 | 5460 | local_bh_enable(); |
91180649 | 5461 | |
a7528198 MT |
5462 | mutex_unlock(&local->mtx); |
5463 | ||
91180649 DK |
5464 | return 0; |
5465 | } | |
8828f81a RM |
5466 | |
5467 | int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev, | |
5468 | const u8 *buf, size_t len) | |
5469 | { | |
5470 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5471 | struct ieee80211_local *local = sdata->local; | |
5472 | struct sk_buff *skb; | |
5473 | ||
5474 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + len + | |
5475 | 30 + /* header size */ | |
5476 | 18); /* 11s header size */ | |
5477 | if (!skb) | |
5478 | return -ENOMEM; | |
5479 | ||
5480 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
5481 | skb_put_data(skb, buf, len); | |
5482 | ||
5483 | skb->dev = dev; | |
5484 | skb->protocol = htons(ETH_P_802_3); | |
5485 | skb_reset_network_header(skb); | |
5486 | skb_reset_mac_header(skb); | |
5487 | ||
5488 | local_bh_disable(); | |
5489 | __ieee80211_subif_start_xmit(skb, skb->dev, 0, | |
a7528198 MT |
5490 | IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP, |
5491 | NULL); | |
e7441c92 | 5492 | local_bh_enable(); |
91180649 DK |
5493 | |
5494 | return 0; | |
5495 | } |