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Commit | Line | Data |
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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
914eac24 | 7 | * Copyright (C) 2018 Intel Corporation |
e2ebc74d JB |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * | |
14 | * Transmit and frame generation functions. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/skbuff.h> | |
ebceec86 | 20 | #include <linux/if_vlan.h> |
e2ebc74d JB |
21 | #include <linux/etherdevice.h> |
22 | #include <linux/bitmap.h> | |
d4e46a3d | 23 | #include <linux/rcupdate.h> |
bc3b2d7f | 24 | #include <linux/export.h> |
881d966b | 25 | #include <net/net_namespace.h> |
e2ebc74d JB |
26 | #include <net/ieee80211_radiotap.h> |
27 | #include <net/cfg80211.h> | |
28 | #include <net/mac80211.h> | |
5caa328e MK |
29 | #include <net/codel.h> |
30 | #include <net/codel_impl.h> | |
e2ebc74d | 31 | #include <asm/unaligned.h> |
fa962b92 | 32 | #include <net/fq_impl.h> |
e2ebc74d JB |
33 | |
34 | #include "ieee80211_i.h" | |
24487981 | 35 | #include "driver-ops.h" |
2c8dccc7 | 36 | #include "led.h" |
33b64eb2 | 37 | #include "mesh.h" |
e2ebc74d JB |
38 | #include "wep.h" |
39 | #include "wpa.h" | |
40 | #include "wme.h" | |
2c8dccc7 | 41 | #include "rate.h" |
e2ebc74d | 42 | |
e2ebc74d JB |
43 | /* misc utils */ |
44 | ||
5a490510 JB |
45 | static inline void ieee80211_tx_stats(struct net_device *dev, u32 len) |
46 | { | |
47 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); | |
48 | ||
49 | u64_stats_update_begin(&tstats->syncp); | |
50 | tstats->tx_packets++; | |
51 | tstats->tx_bytes += len; | |
52 | u64_stats_update_end(&tstats->syncp); | |
53 | } | |
54 | ||
252b86c4 JB |
55 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
56 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 57 | int next_frag_len) |
e2ebc74d | 58 | { |
2103dec1 | 59 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 60 | struct ieee80211_rate *txrate; |
e2ebc74d | 61 | struct ieee80211_local *local = tx->local; |
8318d78a | 62 | struct ieee80211_supported_band *sband; |
358c8d9d | 63 | struct ieee80211_hdr *hdr; |
252b86c4 | 64 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
65 | struct ieee80211_chanctx_conf *chanctx_conf; |
66 | u32 rate_flags = 0; | |
67 | ||
95cd470c FF |
68 | /* assume HW handles this */ |
69 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) | |
70 | return 0; | |
71 | ||
2103dec1 SW |
72 | rcu_read_lock(); |
73 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
74 | if (chanctx_conf) { | |
75 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
76 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
77 | } | |
78 | rcu_read_unlock(); | |
e6a9854b | 79 | |
e6a9854b | 80 | /* uh huh? */ |
0d528d85 | 81 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 82 | return 0; |
e2ebc74d | 83 | |
2d56577b | 84 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 85 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 86 | |
e6a9854b | 87 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
88 | |
89 | /* | |
90 | * data and mgmt (except PS Poll): | |
91 | * - during CFP: 32768 | |
92 | * - during contention period: | |
93 | * if addr1 is group address: 0 | |
94 | * if more fragments = 0 and addr1 is individual address: time to | |
95 | * transmit one ACK plus SIFS | |
96 | * if more fragments = 1 and addr1 is individual address: time to | |
97 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
98 | * | |
99 | * IEEE 802.11, 9.6: | |
100 | * - control response frame (CTS or ACK) shall be transmitted using the | |
101 | * same rate as the immediately previous frame in the frame exchange | |
102 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
103 | * at the highest possible rate belonging to the PHY rates in the | |
104 | * BSSBasicRateSet | |
105 | */ | |
252b86c4 | 106 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 107 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 108 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 109 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
110 | * needs to be updated to support duration field calculation. |
111 | * | |
112 | * RTS: time needed to transmit pending data/mgmt frame plus | |
113 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
114 | * CTS: duration of immediately previous RTS minus time | |
115 | * required to transmit CTS and its SIFS | |
116 | * ACK: 0 if immediately previous directed data/mgmt had | |
117 | * more=0, with more=1 duration in ACK frame is duration | |
118 | * from previous frame minus time needed to transmit ACK | |
119 | * and its SIFS | |
120 | * PS Poll: BIT(15) | BIT(14) | aid | |
121 | */ | |
122 | return 0; | |
123 | } | |
124 | ||
125 | /* data/mgmt */ | |
126 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 127 | return cpu_to_le16(32768); |
e2ebc74d JB |
128 | |
129 | if (group_addr) /* Group address as the destination - no ACK */ | |
130 | return 0; | |
131 | ||
132 | /* Individual destination address: | |
133 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
134 | * CTS and ACK frames shall be transmitted using the highest rate in | |
135 | * basic rate set that is less than or equal to the rate of the | |
136 | * immediately previous frame and that is using the same modulation | |
137 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
138 | * the highest mandatory rate of the PHY that is less than or equal to | |
139 | * the rate of the previous frame is used. | |
140 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
141 | */ | |
142 | rate = -1; | |
8318d78a JB |
143 | /* use lowest available if everything fails */ |
144 | mrate = sband->bitrates[0].bitrate; | |
145 | for (i = 0; i < sband->n_bitrates; i++) { | |
146 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 147 | |
8318d78a JB |
148 | if (r->bitrate > txrate->bitrate) |
149 | break; | |
e2ebc74d | 150 | |
2103dec1 SW |
151 | if ((rate_flags & r->flags) != rate_flags) |
152 | continue; | |
153 | ||
bda3933a | 154 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 155 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
156 | |
157 | switch (sband->band) { | |
57fbcce3 | 158 | case NL80211_BAND_2GHZ: { |
8318d78a JB |
159 | u32 flag; |
160 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
161 | flag = IEEE80211_RATE_MANDATORY_G; | |
162 | else | |
163 | flag = IEEE80211_RATE_MANDATORY_B; | |
164 | if (r->flags & flag) | |
165 | mrate = r->bitrate; | |
166 | break; | |
167 | } | |
57fbcce3 | 168 | case NL80211_BAND_5GHZ: |
8318d78a JB |
169 | if (r->flags & IEEE80211_RATE_MANDATORY_A) |
170 | mrate = r->bitrate; | |
171 | break; | |
57fbcce3 | 172 | case NL80211_BAND_60GHZ: |
3a0c52a6 | 173 | /* TODO, for now fall through */ |
57fbcce3 | 174 | case NUM_NL80211_BANDS: |
8318d78a JB |
175 | WARN_ON(1); |
176 | break; | |
177 | } | |
e2ebc74d JB |
178 | } |
179 | if (rate == -1) { | |
180 | /* No matching basic rate found; use highest suitable mandatory | |
181 | * PHY rate */ | |
2103dec1 | 182 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
183 | } |
184 | ||
6674f210 SW |
185 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
186 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 187 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
188 | dur = 0; |
189 | else | |
190 | /* Time needed to transmit ACK | |
191 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
192 | * to closest integer */ | |
4ee73f33 | 193 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
194 | tx->sdata->vif.bss_conf.use_short_preamble, |
195 | shift); | |
e2ebc74d JB |
196 | |
197 | if (next_frag_len) { | |
198 | /* Frame is fragmented: duration increases with time needed to | |
199 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
200 | dur *= 2; /* ACK + SIFS */ | |
201 | /* next fragment */ | |
4ee73f33 | 202 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 203 | txrate->bitrate, erp, |
438b61b7 SW |
204 | tx->sdata->vif.bss_conf.use_short_preamble, |
205 | shift); | |
e2ebc74d JB |
206 | } |
207 | ||
03f93c3d | 208 | return cpu_to_le16(dur); |
e2ebc74d JB |
209 | } |
210 | ||
e2ebc74d | 211 | /* tx handlers */ |
5c1b98a5 KV |
212 | static ieee80211_tx_result debug_noinline |
213 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
214 | { | |
215 | struct ieee80211_local *local = tx->local; | |
0c74211d | 216 | struct ieee80211_if_managed *ifmgd; |
94a5b3ac | 217 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
5c1b98a5 KV |
218 | |
219 | /* driver doesn't support power save */ | |
30686bf7 | 220 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) |
5c1b98a5 KV |
221 | return TX_CONTINUE; |
222 | ||
223 | /* hardware does dynamic power save */ | |
30686bf7 | 224 | if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) |
5c1b98a5 KV |
225 | return TX_CONTINUE; |
226 | ||
227 | /* dynamic power save disabled */ | |
228 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
229 | return TX_CONTINUE; | |
230 | ||
231 | /* we are scanning, don't enable power save */ | |
232 | if (local->scanning) | |
233 | return TX_CONTINUE; | |
234 | ||
235 | if (!local->ps_sdata) | |
236 | return TX_CONTINUE; | |
237 | ||
238 | /* No point if we're going to suspend */ | |
239 | if (local->quiescing) | |
240 | return TX_CONTINUE; | |
241 | ||
0c74211d KV |
242 | /* dynamic ps is supported only in managed mode */ |
243 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
244 | return TX_CONTINUE; | |
245 | ||
94a5b3ac AO |
246 | if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) |
247 | return TX_CONTINUE; | |
248 | ||
0c74211d KV |
249 | ifmgd = &tx->sdata->u.mgd; |
250 | ||
251 | /* | |
252 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
253 | * u-apsd enabled and the frame is in voip class. This effectively | |
254 | * means that even if all access categories have u-apsd enabled, in | |
255 | * practise u-apsd is only used with the voip ac. This is a | |
256 | * workaround for the case when received voip class packets do not | |
257 | * have correct qos tag for some reason, due the network or the | |
258 | * peer application. | |
259 | * | |
dc41e4d4 | 260 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
261 | * changed via debugfs, user needs to reassociate manually to have |
262 | * everything in sync. | |
263 | */ | |
4875d30d JB |
264 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
265 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
266 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
267 | return TX_CONTINUE; |
268 | ||
5c1b98a5 KV |
269 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
270 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 271 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
272 | IEEE80211_QUEUE_STOP_REASON_PS, |
273 | false); | |
db28569a | 274 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
275 | ieee80211_queue_work(&local->hw, |
276 | &local->dynamic_ps_disable_work); | |
277 | } | |
278 | ||
5db1c07c LC |
279 | /* Don't restart the timer if we're not disassociated */ |
280 | if (!ifmgd->associated) | |
281 | return TX_CONTINUE; | |
282 | ||
5c1b98a5 KV |
283 | mod_timer(&local->dynamic_ps_timer, jiffies + |
284 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
285 | ||
286 | return TX_CONTINUE; | |
287 | } | |
e2ebc74d | 288 | |
d9e8a70f | 289 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 290 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 291 | { |
358c8d9d | 292 | |
e039fa4a | 293 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 294 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 295 | bool assoc = false; |
e2ebc74d | 296 | |
e039fa4a | 297 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 298 | return TX_CONTINUE; |
58d4185e | 299 | |
b23b025f BG |
300 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
301 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
302 | !ieee80211_is_probe_req(hdr->frame_control) && |
303 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
304 | /* | |
305 | * When software scanning only nullfunc frames (to notify | |
306 | * the sleep state to the AP) and probe requests (for the | |
307 | * active scan) are allowed, all other frames should not be | |
308 | * sent and we should not get here, but if we do | |
309 | * nonetheless, drop them to avoid sending them | |
310 | * off-channel. See the link below and | |
311 | * ieee80211_start_scan() for more. | |
312 | * | |
313 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
314 | */ | |
9ae54c84 | 315 | return TX_DROP; |
e2ebc74d | 316 | |
239281f8 RL |
317 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
318 | return TX_CONTINUE; | |
319 | ||
1be7fe8d BJ |
320 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
321 | return TX_CONTINUE; | |
322 | ||
5cf121c3 | 323 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 324 | return TX_CONTINUE; |
e2ebc74d | 325 | |
c2c98fde JB |
326 | if (tx->sta) |
327 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 328 | |
5cf121c3 | 329 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 330 | if (unlikely(!assoc && |
358c8d9d | 331 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 332 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
333 | sdata_info(tx->sdata, |
334 | "dropped data frame to not associated station %pM\n", | |
335 | hdr->addr1); | |
336 | #endif | |
e2ebc74d | 337 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 338 | return TX_DROP; |
e2ebc74d | 339 | } |
72f15d53 MB |
340 | } else if (unlikely(ieee80211_is_data(hdr->frame_control) && |
341 | ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) { | |
29623892 JB |
342 | /* |
343 | * No associated STAs - no need to send multicast | |
344 | * frames. | |
345 | */ | |
346 | return TX_DROP; | |
e2ebc74d JB |
347 | } |
348 | ||
9ae54c84 | 349 | return TX_CONTINUE; |
e2ebc74d JB |
350 | } |
351 | ||
e2ebc74d JB |
352 | /* This function is called whenever the AP is about to exceed the maximum limit |
353 | * of buffered frames for power saving STAs. This situation should not really | |
354 | * happen often during normal operation, so dropping the oldest buffered packet | |
355 | * from each queue should be OK to make some room for new frames. */ | |
356 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
357 | { | |
358 | int total = 0, purged = 0; | |
359 | struct sk_buff *skb; | |
360 | struct ieee80211_sub_if_data *sdata; | |
361 | struct sta_info *sta; | |
362 | ||
79010420 | 363 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
364 | struct ps_data *ps; |
365 | ||
366 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
367 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
368 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
369 | ps = &sdata->u.mesh.ps; | |
d012a605 | 370 | else |
e2ebc74d | 371 | continue; |
d012a605 MP |
372 | |
373 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
374 | if (skb) { |
375 | purged++; | |
6b07d9ca | 376 | ieee80211_free_txskb(&local->hw, skb); |
e2ebc74d | 377 | } |
d012a605 | 378 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 379 | } |
e2ebc74d | 380 | |
948d887d JB |
381 | /* |
382 | * Drop one frame from each station from the lowest-priority | |
383 | * AC that has frames at all. | |
384 | */ | |
d0709a65 | 385 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
386 | int ac; |
387 | ||
388 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
389 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
390 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
391 | if (skb) { | |
392 | purged++; | |
c3e7724b | 393 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
394 | break; |
395 | } | |
e2ebc74d | 396 | } |
e2ebc74d | 397 | } |
d0709a65 | 398 | |
e2ebc74d | 399 | local->total_ps_buffered = total; |
bdcbd8e0 | 400 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
401 | } |
402 | ||
9ae54c84 | 403 | static ieee80211_tx_result |
5cf121c3 | 404 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 405 | { |
e039fa4a | 406 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 407 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 408 | struct ps_data *ps; |
e039fa4a | 409 | |
7d54d0dd JB |
410 | /* |
411 | * broadcast/multicast frame | |
412 | * | |
3f52b7e3 | 413 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
414 | * the frame is buffered to be sent after DTIM beacon frame. |
415 | * This is done either by the hardware or us. | |
416 | */ | |
417 | ||
3f52b7e3 | 418 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
419 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
420 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
421 | if (!tx->sdata->bss) | |
422 | return TX_CONTINUE; | |
423 | ||
424 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
425 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
426 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 427 | } else { |
3e122be0 | 428 | return TX_CONTINUE; |
d012a605 MP |
429 | } |
430 | ||
3e122be0 JB |
431 | |
432 | /* no buffering for ordered frames */ | |
358c8d9d | 433 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 434 | return TX_CONTINUE; |
7d54d0dd | 435 | |
08b99399 JB |
436 | if (ieee80211_is_probe_req(hdr->frame_control)) |
437 | return TX_CONTINUE; | |
438 | ||
30686bf7 | 439 | if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL)) |
f4d57941 JB |
440 | info->hw_queue = tx->sdata->vif.cab_queue; |
441 | ||
9ec1190d FF |
442 | /* no stations in PS mode and no buffered packets */ |
443 | if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf)) | |
9ae54c84 | 444 | return TX_CONTINUE; |
7d54d0dd | 445 | |
62b517cb | 446 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 447 | |
62b517cb | 448 | /* device releases frame after DTIM beacon */ |
30686bf7 | 449 | if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING)) |
62b1208e | 450 | return TX_CONTINUE; |
62b1208e | 451 | |
7d54d0dd | 452 | /* buffered in mac80211 */ |
62b1208e JB |
453 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
454 | purge_old_ps_buffers(tx->local); | |
455 | ||
d012a605 | 456 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
457 | ps_dbg(tx->sdata, |
458 | "BC TX buffer full - dropping the oldest frame\n"); | |
6b07d9ca | 459 | ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
460 | } else |
461 | tx->local->total_ps_buffered++; | |
e2ebc74d | 462 | |
d012a605 | 463 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 464 | |
62b1208e | 465 | return TX_QUEUED; |
e2ebc74d JB |
466 | } |
467 | ||
fb733336 JM |
468 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
469 | struct sk_buff *skb) | |
470 | { | |
471 | if (!ieee80211_is_mgmt(fc)) | |
472 | return 0; | |
473 | ||
c2c98fde | 474 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
475 | return 0; |
476 | ||
d8ca16db | 477 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
478 | return 0; |
479 | ||
480 | return 1; | |
481 | } | |
482 | ||
9ae54c84 | 483 | static ieee80211_tx_result |
5cf121c3 | 484 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
485 | { |
486 | struct sta_info *sta = tx->sta; | |
e039fa4a | 487 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 488 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 489 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 490 | |
02f2f1a9 | 491 | if (unlikely(!sta)) |
9ae54c84 | 492 | return TX_CONTINUE; |
e2ebc74d | 493 | |
c2c98fde | 494 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
495 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
496 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 497 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
498 | int ac = skb_get_queue_mapping(tx->skb); |
499 | ||
08b99399 JB |
500 | if (ieee80211_is_mgmt(hdr->frame_control) && |
501 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
502 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
503 | return TX_CONTINUE; | |
504 | } | |
505 | ||
bdcbd8e0 JB |
506 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
507 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
508 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
509 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
510 | |
511 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
512 | spin_lock(&sta->ps_lock); | |
513 | /* | |
514 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
515 | * been queued to pending queue. No reordering can happen, go | |
516 | * ahead and Tx the packet. | |
517 | */ | |
518 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
519 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
520 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
521 | spin_unlock(&sta->ps_lock); |
522 | return TX_CONTINUE; | |
523 | } | |
524 | ||
948d887d JB |
525 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
526 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
527 | ps_dbg(tx->sdata, |
528 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
529 | sta->sta.addr, ac); | |
c3e7724b | 530 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
531 | } else |
532 | tx->local->total_ps_buffered++; | |
004c872e | 533 | |
e039fa4a | 534 | info->control.jiffies = jiffies; |
5061b0c2 | 535 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 536 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
03c8c06f | 537 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 538 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 539 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
540 | |
541 | if (!timer_pending(&local->sta_cleanup)) | |
542 | mod_timer(&local->sta_cleanup, | |
543 | round_jiffies(jiffies + | |
544 | STA_INFO_CLEANUP_INTERVAL)); | |
545 | ||
c868cb35 JB |
546 | /* |
547 | * We queued up some frames, so the TIM bit might | |
548 | * need to be set, recalculate it. | |
549 | */ | |
550 | sta_info_recalc_tim(sta); | |
551 | ||
9ae54c84 | 552 | return TX_QUEUED; |
bdcbd8e0 JB |
553 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
554 | ps_dbg(tx->sdata, | |
555 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
556 | sta->sta.addr); | |
e2ebc74d | 557 | } |
e2ebc74d | 558 | |
9ae54c84 | 559 | return TX_CONTINUE; |
e2ebc74d JB |
560 | } |
561 | ||
d9e8a70f | 562 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 563 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 564 | { |
5cf121c3 | 565 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 566 | return TX_CONTINUE; |
e2ebc74d | 567 | |
5cf121c3 | 568 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
569 | return ieee80211_tx_h_unicast_ps_buf(tx); |
570 | else | |
571 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
572 | } | |
573 | ||
a621fa4d JB |
574 | static ieee80211_tx_result debug_noinline |
575 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
576 | { | |
577 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
578 | ||
af61a165 JB |
579 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
580 | if (tx->sdata->control_port_no_encrypt) | |
581 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
582 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
9c1c98a3 | 583 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
af61a165 | 584 | } |
a621fa4d JB |
585 | |
586 | return TX_CONTINUE; | |
587 | } | |
588 | ||
d9e8a70f | 589 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 590 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 591 | { |
46e6de15 | 592 | struct ieee80211_key *key; |
e039fa4a | 593 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 594 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 595 | |
3b8d81e0 | 596 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 597 | tx->key = NULL; |
2475b1cc MS |
598 | else if (tx->sta && |
599 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 600 | tx->key = key; |
46f6b060 MH |
601 | else if (ieee80211_is_group_privacy_action(tx->skb) && |
602 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
603 | tx->key = key; | |
3cfcf6ac | 604 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 605 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 606 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
607 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
608 | tx->key = key; | |
f7e0104c JB |
609 | else if (is_multicast_ether_addr(hdr->addr1) && |
610 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
611 | tx->key = key; | |
612 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
613 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 614 | tx->key = key; |
e8f4fb7c | 615 | else |
4922f71f | 616 | tx->key = NULL; |
e2ebc74d JB |
617 | |
618 | if (tx->key) { | |
813d7669 JB |
619 | bool skip_hw = false; |
620 | ||
011bfcc4 | 621 | /* TODO: add threshold stuff again */ |
176e4f84 | 622 | |
97359d12 JB |
623 | switch (tx->key->conf.cipher) { |
624 | case WLAN_CIPHER_SUITE_WEP40: | |
625 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 626 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 627 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
628 | tx->key = NULL; |
629 | break; | |
97359d12 | 630 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 631 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
632 | case WLAN_CIPHER_SUITE_GCMP: |
633 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
634 | if (!ieee80211_is_data_present(hdr->frame_control) && |
635 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
46f6b060 MH |
636 | tx->skb) && |
637 | !ieee80211_is_group_privacy_action(tx->skb)) | |
fb733336 | 638 | tx->key = NULL; |
3b43a187 KV |
639 | else |
640 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 641 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 642 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 643 | break; |
97359d12 | 644 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 645 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
646 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
647 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
648 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
649 | tx->key = NULL; | |
650 | break; | |
176e4f84 | 651 | } |
813d7669 | 652 | |
e54faf29 JB |
653 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
654 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
655 | return TX_DROP; |
656 | ||
f12553eb | 657 | if (!skip_hw && tx->key && |
382b1655 | 658 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 659 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
660 | } |
661 | ||
9ae54c84 | 662 | return TX_CONTINUE; |
e2ebc74d JB |
663 | } |
664 | ||
d9e8a70f | 665 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 666 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 667 | { |
e039fa4a | 668 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
669 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
670 | struct ieee80211_supported_band *sband; | |
a2c40249 | 671 | u32 len; |
e6a9854b | 672 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 673 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 674 | bool assoc = false; |
8318d78a | 675 | |
e6a9854b | 676 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 677 | |
2d56577b | 678 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 679 | |
a2c40249 | 680 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 681 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
682 | |
683 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 684 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
685 | txrc.sband = sband; |
686 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
687 | txrc.skb = tx->skb; | |
688 | txrc.reported_rate.idx = -1; | |
2d56577b | 689 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
2ffbe6d3 FF |
690 | |
691 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
692 | txrc.rate_idx_mcs_mask = | |
693 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
694 | ||
8f0729b1 | 695 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 696 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
5765f9f6 BVB |
697 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC || |
698 | tx->sdata->vif.type == NL80211_IFTYPE_OCB); | |
e6a9854b JB |
699 | |
700 | /* set up RTS protection if desired */ | |
b9a5f8ca | 701 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 702 | txrc.rts = true; |
e2ebc74d | 703 | } |
e2ebc74d | 704 | |
0d528d85 | 705 | info->control.use_rts = txrc.rts; |
991fec09 FF |
706 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
707 | ||
e6a9854b JB |
708 | /* |
709 | * Use short preamble if the BSS can handle it, but not for | |
710 | * management frames unless we know the receiver can handle | |
711 | * that -- the management frame might be to a station that | |
712 | * just wants a probe response. | |
713 | */ | |
714 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
715 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 716 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
717 | txrc.short_preamble = true; |
718 | ||
719 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 720 | |
dfdfc2be SE |
721 | /* don't ask rate control when rate already injected via radiotap */ |
722 | if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT) | |
723 | return TX_CONTINUE; | |
724 | ||
c2c98fde JB |
725 | if (tx->sta) |
726 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
727 | |
728 | /* | |
729 | * Lets not bother rate control if we're associated and cannot | |
730 | * talk to the sta. This should not happen. | |
731 | */ | |
c2c98fde | 732 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
733 | !rate_usable_index_exists(sband, &tx->sta->sta), |
734 | "%s: Dropped data frame as no usable bitrate found while " | |
735 | "scanning and associated. Target station: " | |
736 | "%pM on %d GHz band\n", | |
47846c9b | 737 | tx->sdata->name, hdr->addr1, |
2d56577b | 738 | info->band ? 5 : 2)) |
b770b43e | 739 | return TX_DROP; |
2e92e6f2 | 740 | |
b770b43e LR |
741 | /* |
742 | * If we're associated with the sta at this point we know we can at | |
743 | * least send the frame at the lowest bit rate. | |
744 | */ | |
e6a9854b JB |
745 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
746 | ||
0d528d85 FF |
747 | if (tx->sta && !info->control.skip_table) |
748 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
749 | ||
750 | if (unlikely(info->control.rates[0].idx < 0)) { | |
751 | if (ratetbl) { | |
752 | struct ieee80211_tx_rate rate = { | |
753 | .idx = ratetbl->rate[0].idx, | |
754 | .flags = ratetbl->rate[0].flags, | |
755 | .count = ratetbl->rate[0].count | |
756 | }; | |
757 | ||
758 | if (ratetbl->rate[0].idx < 0) | |
759 | return TX_DROP; | |
760 | ||
761 | tx->rate = rate; | |
762 | } else { | |
763 | return TX_DROP; | |
764 | } | |
765 | } else { | |
766 | tx->rate = info->control.rates[0]; | |
767 | } | |
e6a9854b | 768 | |
c1ce5a74 | 769 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 770 | txrc.reported_rate = tx->rate; |
c1ce5a74 | 771 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
e5a9f8d0 | 772 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
c1ce5a74 | 773 | } else if (tx->sta) |
e5a9f8d0 | 774 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
e039fa4a | 775 | |
0d528d85 FF |
776 | if (ratetbl) |
777 | return TX_CONTINUE; | |
778 | ||
e6a9854b JB |
779 | if (unlikely(!info->control.rates[0].count)) |
780 | info->control.rates[0].count = 1; | |
e2ebc74d | 781 | |
9955151d GS |
782 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
783 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
784 | info->control.rates[0].count = 1; | |
785 | ||
e6a9854b JB |
786 | return TX_CONTINUE; |
787 | } | |
788 | ||
ba8c3d6f FF |
789 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
790 | { | |
791 | u16 *seq = &sta->tid_seq[tid]; | |
792 | __le16 ret = cpu_to_le16(*seq); | |
793 | ||
794 | /* Increase the sequence number. */ | |
795 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
796 | ||
797 | return ret; | |
798 | } | |
799 | ||
f591fa5d JB |
800 | static ieee80211_tx_result debug_noinline |
801 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
802 | { | |
803 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
804 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
f591fa5d JB |
805 | int tid; |
806 | ||
25d834e1 JB |
807 | /* |
808 | * Packet injection may want to control the sequence | |
809 | * number, if we have no matching interface then we | |
810 | * neither assign one ourselves nor ask the driver to. | |
811 | */ | |
5061b0c2 | 812 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
813 | return TX_CONTINUE; |
814 | ||
f591fa5d JB |
815 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
816 | return TX_CONTINUE; | |
817 | ||
818 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
819 | return TX_CONTINUE; | |
820 | ||
49a59543 JB |
821 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
822 | return TX_CONTINUE; | |
823 | ||
94778280 JB |
824 | /* |
825 | * Anything but QoS data that has a sequence number field | |
826 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
827 | * counter. QoS data frames with a multicast destination |
828 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 829 | */ |
c4c205f3 BC |
830 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
831 | is_multicast_ether_addr(hdr->addr1)) { | |
b9771d41 JB |
832 | if (tx->flags & IEEE80211_TX_NO_SEQNO) |
833 | return TX_CONTINUE; | |
94778280 | 834 | /* driver should assign sequence number */ |
f591fa5d | 835 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
836 | /* for pure STA mode without beacons, we can do it */ |
837 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
838 | tx->sdata->sequence_number += 0x10; | |
79c892b8 | 839 | if (tx->sta) |
e5a9f8d0 | 840 | tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++; |
f591fa5d JB |
841 | return TX_CONTINUE; |
842 | } | |
843 | ||
844 | /* | |
845 | * This should be true for injected/management frames only, for | |
846 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
847 | * above since they are not QoS-data frames. | |
848 | */ | |
849 | if (!tx->sta) | |
850 | return TX_CONTINUE; | |
851 | ||
852 | /* include per-STA, per-TID sequence counter */ | |
a1f2ba04 | 853 | tid = ieee80211_get_tid(hdr); |
e5a9f8d0 | 854 | tx->sta->tx_stats.msdu[tid]++; |
f591fa5d | 855 | |
bb42f2d1 | 856 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); |
f591fa5d JB |
857 | |
858 | return TX_CONTINUE; | |
859 | } | |
860 | ||
252b86c4 | 861 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
862 | struct sk_buff *skb, int hdrlen, |
863 | int frag_threshold) | |
864 | { | |
252b86c4 | 865 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 866 | struct ieee80211_tx_info *info; |
252b86c4 | 867 | struct sk_buff *tmp; |
2de8e0d9 JB |
868 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
869 | int pos = hdrlen + per_fragm; | |
870 | int rem = skb->len - hdrlen - per_fragm; | |
871 | ||
872 | if (WARN_ON(rem < 0)) | |
873 | return -EINVAL; | |
874 | ||
252b86c4 JB |
875 | /* first fragment was already added to queue by caller */ |
876 | ||
2de8e0d9 JB |
877 | while (rem) { |
878 | int fraglen = per_fragm; | |
879 | ||
880 | if (fraglen > rem) | |
881 | fraglen = rem; | |
882 | rem -= fraglen; | |
883 | tmp = dev_alloc_skb(local->tx_headroom + | |
884 | frag_threshold + | |
2475b1cc | 885 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
886 | IEEE80211_ENCRYPT_TAILROOM); |
887 | if (!tmp) | |
888 | return -ENOMEM; | |
252b86c4 JB |
889 | |
890 | __skb_queue_tail(&tx->skbs, tmp); | |
891 | ||
2475b1cc MS |
892 | skb_reserve(tmp, |
893 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
894 | ||
2de8e0d9 JB |
895 | /* copy control information */ |
896 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
897 | |
898 | info = IEEE80211_SKB_CB(tmp); | |
899 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
900 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
901 | ||
902 | if (rem) | |
903 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
904 | ||
2de8e0d9 JB |
905 | skb_copy_queue_mapping(tmp, skb); |
906 | tmp->priority = skb->priority; | |
2de8e0d9 | 907 | tmp->dev = skb->dev; |
2de8e0d9 JB |
908 | |
909 | /* copy header and data */ | |
59ae1d12 JB |
910 | skb_put_data(tmp, skb->data, hdrlen); |
911 | skb_put_data(tmp, skb->data + pos, fraglen); | |
2de8e0d9 JB |
912 | |
913 | pos += fraglen; | |
914 | } | |
915 | ||
252b86c4 | 916 | /* adjust first fragment's length */ |
338f977f | 917 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
918 | return 0; |
919 | } | |
920 | ||
d9e8a70f | 921 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
922 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
923 | { | |
2de8e0d9 JB |
924 | struct sk_buff *skb = tx->skb; |
925 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
926 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 927 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
928 | int hdrlen; |
929 | int fragnum; | |
e2454948 | 930 | |
252b86c4 JB |
931 | /* no matter what happens, tx->skb moves to tx->skbs */ |
932 | __skb_queue_tail(&tx->skbs, skb); | |
933 | tx->skb = NULL; | |
934 | ||
a26eb27a JB |
935 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
936 | return TX_CONTINUE; | |
937 | ||
f3fe4e93 | 938 | if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) |
e2454948 JB |
939 | return TX_CONTINUE; |
940 | ||
eefce91a JB |
941 | /* |
942 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 943 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 944 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 945 | */ |
8b30b1fe | 946 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
947 | return TX_DROP; |
948 | ||
065e9605 | 949 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 950 | |
a26eb27a | 951 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 952 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 953 | return TX_DROP; |
e6a9854b | 954 | |
2de8e0d9 JB |
955 | /* |
956 | * Now fragment the frame. This will allocate all the fragments and | |
957 | * chain them (using skb as the first fragment) to skb->next. | |
958 | * During transmission, we will remove the successfully transmitted | |
959 | * fragments from this list. When the low-level driver rejects one | |
960 | * of the fragments then we will simply pretend to accept the skb | |
961 | * but store it away as pending. | |
962 | */ | |
252b86c4 | 963 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 964 | return TX_DROP; |
e6a9854b | 965 | |
2de8e0d9 JB |
966 | /* update duration/seq/flags of fragments */ |
967 | fragnum = 0; | |
252b86c4 JB |
968 | |
969 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 970 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 971 | |
2de8e0d9 JB |
972 | hdr = (void *)skb->data; |
973 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 974 | |
252b86c4 | 975 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 976 | hdr->frame_control |= morefrags; |
e6a9854b JB |
977 | /* |
978 | * No multi-rate retries for fragmented frames, that | |
979 | * would completely throw off the NAV at other STAs. | |
980 | */ | |
981 | info->control.rates[1].idx = -1; | |
982 | info->control.rates[2].idx = -1; | |
983 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 984 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 985 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
986 | } else { |
987 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 988 | } |
2de8e0d9 JB |
989 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
990 | fragnum++; | |
252b86c4 | 991 | } |
e2ebc74d | 992 | |
9ae54c84 | 993 | return TX_CONTINUE; |
e2ebc74d JB |
994 | } |
995 | ||
feff1f2f JB |
996 | static ieee80211_tx_result debug_noinline |
997 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
998 | { | |
252b86c4 | 999 | struct sk_buff *skb; |
560d2682 | 1000 | int ac = -1; |
feff1f2f JB |
1001 | |
1002 | if (!tx->sta) | |
1003 | return TX_CONTINUE; | |
1004 | ||
252b86c4 | 1005 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 1006 | ac = skb_get_queue_mapping(skb); |
e5a9f8d0 | 1007 | tx->sta->tx_stats.bytes[ac] += skb->len; |
252b86c4 | 1008 | } |
560d2682 | 1009 | if (ac >= 0) |
e5a9f8d0 | 1010 | tx->sta->tx_stats.packets[ac]++; |
feff1f2f JB |
1011 | |
1012 | return TX_CONTINUE; | |
1013 | } | |
1014 | ||
d9e8a70f | 1015 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1016 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1017 | { | |
1018 | if (!tx->key) | |
1019 | return TX_CONTINUE; | |
1020 | ||
97359d12 JB |
1021 | switch (tx->key->conf.cipher) { |
1022 | case WLAN_CIPHER_SUITE_WEP40: | |
1023 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1024 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1025 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1026 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1027 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1028 | return ieee80211_crypto_ccmp_encrypt( |
1029 | tx, IEEE80211_CCMP_MIC_LEN); | |
1030 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1031 | return ieee80211_crypto_ccmp_encrypt( | |
1032 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1033 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1034 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1035 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1036 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1037 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1038 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1039 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1040 | case WLAN_CIPHER_SUITE_GCMP: |
1041 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1042 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1043 | default: |
d32a1028 | 1044 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1045 | } |
1046 | ||
e2454948 JB |
1047 | return TX_DROP; |
1048 | } | |
1049 | ||
d9e8a70f | 1050 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1051 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1052 | { | |
252b86c4 | 1053 | struct sk_buff *skb; |
2de8e0d9 JB |
1054 | struct ieee80211_hdr *hdr; |
1055 | int next_len; | |
1056 | bool group_addr; | |
03f93c3d | 1057 | |
252b86c4 | 1058 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1059 | hdr = (void *) skb->data; |
7e0aae47 JM |
1060 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1061 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1062 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1063 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1064 | next_len = next->len; | |
1065 | } else | |
1066 | next_len = 0; | |
2de8e0d9 | 1067 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1068 | |
2de8e0d9 | 1069 | hdr->duration_id = |
252b86c4 JB |
1070 | ieee80211_duration(tx, skb, group_addr, next_len); |
1071 | } | |
03f93c3d JB |
1072 | |
1073 | return TX_CONTINUE; | |
1074 | } | |
1075 | ||
e2ebc74d JB |
1076 | /* actual transmit path */ |
1077 | ||
a622ab72 JB |
1078 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1079 | struct sk_buff *skb, | |
1080 | struct ieee80211_tx_info *info, | |
1081 | struct tid_ampdu_tx *tid_tx, | |
1082 | int tid) | |
1083 | { | |
1084 | bool queued = false; | |
285fa695 | 1085 | bool reset_agg_timer = false; |
aa454580 | 1086 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1087 | |
1088 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1089 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1090 | reset_agg_timer = true; |
0ab33703 JB |
1091 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1092 | /* | |
1093 | * nothing -- this aggregation session is being started | |
1094 | * but that might still fail with the driver | |
1095 | */ | |
ba8c3d6f | 1096 | } else if (!tx->sta->sta.txq[tid]) { |
a622ab72 JB |
1097 | spin_lock(&tx->sta->lock); |
1098 | /* | |
1099 | * Need to re-check now, because we may get here | |
1100 | * | |
1101 | * 1) in the window during which the setup is actually | |
1102 | * already done, but not marked yet because not all | |
1103 | * packets are spliced over to the driver pending | |
1104 | * queue yet -- if this happened we acquire the lock | |
1105 | * either before or after the splice happens, but | |
1106 | * need to recheck which of these cases happened. | |
1107 | * | |
1108 | * 2) during session teardown, if the OPERATIONAL bit | |
1109 | * was cleared due to the teardown but the pointer | |
1110 | * hasn't been assigned NULL yet (or we loaded it | |
1111 | * before it was assigned) -- in this case it may | |
1112 | * now be NULL which means we should just let the | |
1113 | * packet pass through because splicing the frames | |
1114 | * back is already done. | |
1115 | */ | |
40b275b6 | 1116 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1117 | |
1118 | if (!tid_tx) { | |
1119 | /* do nothing, let packet pass through */ | |
1120 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1121 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1122 | reset_agg_timer = true; |
a622ab72 JB |
1123 | } else { |
1124 | queued = true; | |
f6d4671a EG |
1125 | if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) { |
1126 | clear_sta_flag(tx->sta, WLAN_STA_SP); | |
1127 | ps_dbg(tx->sta->sdata, | |
1128 | "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n", | |
1129 | tx->sta->sta.addr, tx->sta->sta.aid); | |
1130 | } | |
a622ab72 JB |
1131 | info->control.vif = &tx->sdata->vif; |
1132 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
facde7f3 | 1133 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1134 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1135 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1136 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1137 | } |
1138 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1139 | |
1140 | if (purge_skb) | |
c3e7724b | 1141 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1142 | } |
1143 | ||
285fa695 | 1144 | /* reset session timer */ |
914eac24 | 1145 | if (reset_agg_timer) |
12d3952f | 1146 | tid_tx->last_tx = jiffies; |
285fa695 | 1147 | |
a622ab72 JB |
1148 | return queued; |
1149 | } | |
1150 | ||
58d4185e JB |
1151 | /* |
1152 | * initialises @tx | |
7c10770f JB |
1153 | * pass %NULL for the station if unknown, a valid pointer if known |
1154 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1155 | */ |
9ae54c84 | 1156 | static ieee80211_tx_result |
3b8d81e0 JB |
1157 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1158 | struct ieee80211_tx_data *tx, | |
7c10770f | 1159 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1160 | { |
3b8d81e0 | 1161 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1162 | struct ieee80211_hdr *hdr; |
e039fa4a | 1163 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1164 | int tid; |
e2ebc74d JB |
1165 | |
1166 | memset(tx, 0, sizeof(*tx)); | |
1167 | tx->skb = skb; | |
e2ebc74d | 1168 | tx->local = local; |
3b8d81e0 | 1169 | tx->sdata = sdata; |
252b86c4 | 1170 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1171 | |
cd8ffc80 JB |
1172 | /* |
1173 | * If this flag is set to true anywhere, and we get here, | |
1174 | * we are doing the needed processing, so remove the flag | |
1175 | * now. | |
1176 | */ | |
1177 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1178 | ||
58d4185e JB |
1179 | hdr = (struct ieee80211_hdr *) skb->data; |
1180 | ||
7c10770f JB |
1181 | if (likely(sta)) { |
1182 | if (!IS_ERR(sta)) | |
1183 | tx->sta = sta; | |
1184 | } else { | |
1185 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1186 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1187 | if (!tx->sta && sdata->wdev.use_4addr) | |
1188 | return TX_DROP; | |
1189 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1190 | IEEE80211_TX_CTL_INJECTED) || | |
1191 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1192 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1193 | } | |
1194 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1195 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1196 | } |
58d4185e | 1197 | |
cd8ffc80 | 1198 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1199 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
30686bf7 JB |
1200 | ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) && |
1201 | !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1202 | struct tid_ampdu_tx *tid_tx; |
1203 | ||
a1f2ba04 | 1204 | tid = ieee80211_get_tid(hdr); |
8b30b1fe | 1205 | |
a622ab72 JB |
1206 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1207 | if (tid_tx) { | |
1208 | bool queued; | |
cd8ffc80 | 1209 | |
a622ab72 JB |
1210 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1211 | tid_tx, tid); | |
1212 | ||
1213 | if (unlikely(queued)) | |
1214 | return TX_QUEUED; | |
1215 | } | |
8b30b1fe S |
1216 | } |
1217 | ||
badffb72 | 1218 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1219 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1220 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1221 | } else |
5cf121c3 | 1222 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1223 | |
a26eb27a JB |
1224 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1225 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1226 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1227 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1228 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1229 | } |
1230 | ||
e2ebc74d | 1231 | if (!tx->sta) |
e039fa4a | 1232 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 | 1233 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) { |
e039fa4a | 1234 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 FF |
1235 | ieee80211_check_fast_xmit(tx->sta); |
1236 | } | |
58d4185e | 1237 | |
e039fa4a | 1238 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1239 | |
9ae54c84 | 1240 | return TX_CONTINUE; |
e2ebc74d JB |
1241 | } |
1242 | ||
80a83cfc MK |
1243 | static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local, |
1244 | struct ieee80211_vif *vif, | |
dbef5362 | 1245 | struct sta_info *sta, |
80a83cfc | 1246 | struct sk_buff *skb) |
ba8c3d6f FF |
1247 | { |
1248 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
ba8c3d6f | 1249 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
ba8c3d6f | 1250 | struct ieee80211_txq *txq = NULL; |
ba8c3d6f | 1251 | |
c3732a7b FF |
1252 | if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) || |
1253 | (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)) | |
80a83cfc | 1254 | return NULL; |
ba8c3d6f | 1255 | |
adf8ed01 JB |
1256 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) { |
1257 | if ((!ieee80211_is_mgmt(hdr->frame_control) || | |
0eeb2b67 SS |
1258 | ieee80211_is_bufferable_mmpdu(hdr->frame_control) || |
1259 | vif->type == NL80211_IFTYPE_STATION) && | |
adf8ed01 JB |
1260 | sta && sta->uploaded) { |
1261 | /* | |
1262 | * This will be NULL if the driver didn't set the | |
1263 | * opt-in hardware flag. | |
1264 | */ | |
1265 | txq = sta->sta.txq[IEEE80211_NUM_TIDS]; | |
1266 | } | |
1267 | } else if (sta) { | |
ba8c3d6f FF |
1268 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; |
1269 | ||
dbef5362 MK |
1270 | if (!sta->uploaded) |
1271 | return NULL; | |
1272 | ||
1273 | txq = sta->sta.txq[tid]; | |
ba8c3d6f FF |
1274 | } else if (vif) { |
1275 | txq = vif->txq; | |
1276 | } | |
1277 | ||
1278 | if (!txq) | |
80a83cfc | 1279 | return NULL; |
ba8c3d6f | 1280 | |
80a83cfc MK |
1281 | return to_txq_info(txq); |
1282 | } | |
ba8c3d6f | 1283 | |
5caa328e MK |
1284 | static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb) |
1285 | { | |
1286 | IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time(); | |
1287 | } | |
1288 | ||
5caa328e MK |
1289 | static u32 codel_skb_len_func(const struct sk_buff *skb) |
1290 | { | |
1291 | return skb->len; | |
1292 | } | |
1293 | ||
1294 | static codel_time_t codel_skb_time_func(const struct sk_buff *skb) | |
1295 | { | |
1296 | const struct ieee80211_tx_info *info; | |
1297 | ||
1298 | info = (const struct ieee80211_tx_info *)skb->cb; | |
1299 | return info->control.enqueue_time; | |
1300 | } | |
1301 | ||
1302 | static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars, | |
1303 | void *ctx) | |
1304 | { | |
1305 | struct ieee80211_local *local; | |
1306 | struct txq_info *txqi; | |
1307 | struct fq *fq; | |
1308 | struct fq_flow *flow; | |
1309 | ||
1310 | txqi = ctx; | |
1311 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1312 | fq = &local->fq; | |
1313 | ||
1314 | if (cvars == &txqi->def_cvars) | |
1315 | flow = &txqi->def_flow; | |
1316 | else | |
1317 | flow = &fq->flows[cvars - local->cvars]; | |
1318 | ||
1319 | return fq_flow_dequeue(fq, flow); | |
1320 | } | |
1321 | ||
1322 | static void codel_drop_func(struct sk_buff *skb, | |
1323 | void *ctx) | |
1324 | { | |
1325 | struct ieee80211_local *local; | |
1326 | struct ieee80211_hw *hw; | |
1327 | struct txq_info *txqi; | |
1328 | ||
1329 | txqi = ctx; | |
1330 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1331 | hw = &local->hw; | |
1332 | ||
1333 | ieee80211_free_txskb(hw, skb); | |
1334 | } | |
1335 | ||
fa962b92 MK |
1336 | static struct sk_buff *fq_tin_dequeue_func(struct fq *fq, |
1337 | struct fq_tin *tin, | |
1338 | struct fq_flow *flow) | |
1339 | { | |
5caa328e MK |
1340 | struct ieee80211_local *local; |
1341 | struct txq_info *txqi; | |
1342 | struct codel_vars *cvars; | |
1343 | struct codel_params *cparams; | |
1344 | struct codel_stats *cstats; | |
1345 | ||
1346 | local = container_of(fq, struct ieee80211_local, fq); | |
1347 | txqi = container_of(tin, struct txq_info, tin); | |
8d51dbb8 | 1348 | cstats = &txqi->cstats; |
5caa328e | 1349 | |
484a54c2 THJ |
1350 | if (txqi->txq.sta) { |
1351 | struct sta_info *sta = container_of(txqi->txq.sta, | |
1352 | struct sta_info, sta); | |
1353 | cparams = &sta->cparams; | |
1354 | } else { | |
1355 | cparams = &local->cparams; | |
1356 | } | |
1357 | ||
5caa328e MK |
1358 | if (flow == &txqi->def_flow) |
1359 | cvars = &txqi->def_cvars; | |
1360 | else | |
1361 | cvars = &local->cvars[flow - fq->flows]; | |
1362 | ||
1363 | return codel_dequeue(txqi, | |
1364 | &flow->backlog, | |
1365 | cparams, | |
1366 | cvars, | |
1367 | cstats, | |
1368 | codel_skb_len_func, | |
1369 | codel_skb_time_func, | |
1370 | codel_drop_func, | |
1371 | codel_dequeue_func); | |
fa962b92 MK |
1372 | } |
1373 | ||
1374 | static void fq_skb_free_func(struct fq *fq, | |
1375 | struct fq_tin *tin, | |
1376 | struct fq_flow *flow, | |
1377 | struct sk_buff *skb) | |
1378 | { | |
1379 | struct ieee80211_local *local; | |
1380 | ||
1381 | local = container_of(fq, struct ieee80211_local, fq); | |
1382 | ieee80211_free_txskb(&local->hw, skb); | |
1383 | } | |
1384 | ||
1385 | static struct fq_flow *fq_flow_get_default_func(struct fq *fq, | |
1386 | struct fq_tin *tin, | |
1387 | int idx, | |
1388 | struct sk_buff *skb) | |
1389 | { | |
1390 | struct txq_info *txqi; | |
1391 | ||
1392 | txqi = container_of(tin, struct txq_info, tin); | |
1393 | return &txqi->def_flow; | |
1394 | } | |
1395 | ||
80a83cfc MK |
1396 | static void ieee80211_txq_enqueue(struct ieee80211_local *local, |
1397 | struct txq_info *txqi, | |
1398 | struct sk_buff *skb) | |
1399 | { | |
fa962b92 MK |
1400 | struct fq *fq = &local->fq; |
1401 | struct fq_tin *tin = &txqi->tin; | |
f2ac7e30 | 1402 | |
5caa328e | 1403 | ieee80211_set_skb_enqueue_time(skb); |
fa962b92 MK |
1404 | fq_tin_enqueue(fq, tin, skb, |
1405 | fq_skb_free_func, | |
1406 | fq_flow_get_default_func); | |
1407 | } | |
ba8c3d6f | 1408 | |
2a9e2579 JB |
1409 | static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin, |
1410 | struct fq_flow *flow, struct sk_buff *skb, | |
1411 | void *data) | |
1412 | { | |
1413 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1414 | ||
1415 | return info->control.vif == data; | |
1416 | } | |
1417 | ||
1418 | void ieee80211_txq_remove_vlan(struct ieee80211_local *local, | |
1419 | struct ieee80211_sub_if_data *sdata) | |
1420 | { | |
1421 | struct fq *fq = &local->fq; | |
1422 | struct txq_info *txqi; | |
1423 | struct fq_tin *tin; | |
1424 | struct ieee80211_sub_if_data *ap; | |
1425 | ||
1426 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) | |
1427 | return; | |
1428 | ||
1429 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1430 | ||
1431 | if (!ap->vif.txq) | |
1432 | return; | |
1433 | ||
1434 | txqi = to_txq_info(ap->vif.txq); | |
1435 | tin = &txqi->tin; | |
1436 | ||
1437 | spin_lock_bh(&fq->lock); | |
1438 | fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif, | |
1439 | fq_skb_free_func); | |
1440 | spin_unlock_bh(&fq->lock); | |
1441 | } | |
1442 | ||
fa962b92 MK |
1443 | void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata, |
1444 | struct sta_info *sta, | |
1445 | struct txq_info *txqi, int tid) | |
1446 | { | |
1447 | fq_tin_init(&txqi->tin); | |
1448 | fq_flow_init(&txqi->def_flow); | |
5caa328e | 1449 | codel_vars_init(&txqi->def_cvars); |
8d51dbb8 | 1450 | codel_stats_init(&txqi->cstats); |
bb42f2d1 | 1451 | __skb_queue_head_init(&txqi->frags); |
fa962b92 MK |
1452 | |
1453 | txqi->txq.vif = &sdata->vif; | |
1454 | ||
adf8ed01 | 1455 | if (!sta) { |
fa962b92 MK |
1456 | sdata->vif.txq = &txqi->txq; |
1457 | txqi->txq.tid = 0; | |
1458 | txqi->txq.ac = IEEE80211_AC_BE; | |
adf8ed01 JB |
1459 | |
1460 | return; | |
80a83cfc | 1461 | } |
adf8ed01 JB |
1462 | |
1463 | if (tid == IEEE80211_NUM_TIDS) { | |
0eeb2b67 SS |
1464 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
1465 | /* Drivers need to opt in to the management MPDU TXQ */ | |
1466 | if (!ieee80211_hw_check(&sdata->local->hw, | |
1467 | STA_MMPDU_TXQ)) | |
1468 | return; | |
1469 | } else if (!ieee80211_hw_check(&sdata->local->hw, | |
1470 | BUFF_MMPDU_TXQ)) { | |
1471 | /* Drivers need to opt in to the bufferable MMPDU TXQ */ | |
adf8ed01 | 1472 | return; |
0eeb2b67 | 1473 | } |
adf8ed01 JB |
1474 | txqi->txq.ac = IEEE80211_AC_VO; |
1475 | } else { | |
1476 | txqi->txq.ac = ieee80211_ac_from_tid(tid); | |
1477 | } | |
1478 | ||
1479 | txqi->txq.sta = &sta->sta; | |
1480 | txqi->txq.tid = tid; | |
1481 | sta->sta.txq[tid] = &txqi->txq; | |
fa962b92 | 1482 | } |
ba8c3d6f | 1483 | |
fa962b92 MK |
1484 | void ieee80211_txq_purge(struct ieee80211_local *local, |
1485 | struct txq_info *txqi) | |
1486 | { | |
1487 | struct fq *fq = &local->fq; | |
1488 | struct fq_tin *tin = &txqi->tin; | |
1489 | ||
1490 | fq_tin_reset(fq, tin, fq_skb_free_func); | |
bb42f2d1 | 1491 | ieee80211_purge_tx_queue(&local->hw, &txqi->frags); |
fa962b92 MK |
1492 | } |
1493 | ||
2fe4a29a THJ |
1494 | void ieee80211_txq_set_params(struct ieee80211_local *local) |
1495 | { | |
1496 | if (local->hw.wiphy->txq_limit) | |
1497 | local->fq.limit = local->hw.wiphy->txq_limit; | |
1498 | else | |
1499 | local->hw.wiphy->txq_limit = local->fq.limit; | |
1500 | ||
1501 | if (local->hw.wiphy->txq_memory_limit) | |
1502 | local->fq.memory_limit = local->hw.wiphy->txq_memory_limit; | |
1503 | else | |
1504 | local->hw.wiphy->txq_memory_limit = local->fq.memory_limit; | |
1505 | ||
1506 | if (local->hw.wiphy->txq_quantum) | |
1507 | local->fq.quantum = local->hw.wiphy->txq_quantum; | |
1508 | else | |
1509 | local->hw.wiphy->txq_quantum = local->fq.quantum; | |
1510 | } | |
1511 | ||
fa962b92 MK |
1512 | int ieee80211_txq_setup_flows(struct ieee80211_local *local) |
1513 | { | |
1514 | struct fq *fq = &local->fq; | |
1515 | int ret; | |
5caa328e | 1516 | int i; |
3ff23cd5 THJ |
1517 | bool supp_vht = false; |
1518 | enum nl80211_band band; | |
fa962b92 MK |
1519 | |
1520 | if (!local->ops->wake_tx_queue) | |
1521 | return 0; | |
1522 | ||
1523 | ret = fq_init(fq, 4096); | |
1524 | if (ret) | |
1525 | return ret; | |
1526 | ||
3ff23cd5 THJ |
1527 | /* |
1528 | * If the hardware doesn't support VHT, it is safe to limit the maximum | |
1529 | * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n. | |
1530 | */ | |
1531 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
1532 | struct ieee80211_supported_band *sband; | |
1533 | ||
1534 | sband = local->hw.wiphy->bands[band]; | |
1535 | if (!sband) | |
1536 | continue; | |
1537 | ||
1538 | supp_vht = supp_vht || sband->vht_cap.vht_supported; | |
1539 | } | |
1540 | ||
1541 | if (!supp_vht) | |
1542 | fq->memory_limit = 4 << 20; /* 4 Mbytes */ | |
1543 | ||
5caa328e | 1544 | codel_params_init(&local->cparams); |
5caa328e MK |
1545 | local->cparams.interval = MS2TIME(100); |
1546 | local->cparams.target = MS2TIME(20); | |
1547 | local->cparams.ecn = true; | |
1548 | ||
1549 | local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]), | |
1550 | GFP_KERNEL); | |
1551 | if (!local->cvars) { | |
59a7c828 | 1552 | spin_lock_bh(&fq->lock); |
5caa328e | 1553 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1554 | spin_unlock_bh(&fq->lock); |
5caa328e MK |
1555 | return -ENOMEM; |
1556 | } | |
1557 | ||
1558 | for (i = 0; i < fq->flows_cnt; i++) | |
1559 | codel_vars_init(&local->cvars[i]); | |
1560 | ||
2fe4a29a THJ |
1561 | ieee80211_txq_set_params(local); |
1562 | ||
fa962b92 MK |
1563 | return 0; |
1564 | } | |
1565 | ||
1566 | void ieee80211_txq_teardown_flows(struct ieee80211_local *local) | |
1567 | { | |
1568 | struct fq *fq = &local->fq; | |
1569 | ||
1570 | if (!local->ops->wake_tx_queue) | |
1571 | return; | |
1572 | ||
5caa328e MK |
1573 | kfree(local->cvars); |
1574 | local->cvars = NULL; | |
1575 | ||
59a7c828 | 1576 | spin_lock_bh(&fq->lock); |
fa962b92 | 1577 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1578 | spin_unlock_bh(&fq->lock); |
ba8c3d6f FF |
1579 | } |
1580 | ||
bb42f2d1 THJ |
1581 | static bool ieee80211_queue_skb(struct ieee80211_local *local, |
1582 | struct ieee80211_sub_if_data *sdata, | |
1583 | struct sta_info *sta, | |
1584 | struct sk_buff *skb) | |
1585 | { | |
bb42f2d1 THJ |
1586 | struct fq *fq = &local->fq; |
1587 | struct ieee80211_vif *vif; | |
1588 | struct txq_info *txqi; | |
bb42f2d1 THJ |
1589 | |
1590 | if (!local->ops->wake_tx_queue || | |
1591 | sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
1592 | return false; | |
1593 | ||
bb42f2d1 THJ |
1594 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1595 | sdata = container_of(sdata->bss, | |
1596 | struct ieee80211_sub_if_data, u.ap); | |
1597 | ||
1598 | vif = &sdata->vif; | |
dbef5362 | 1599 | txqi = ieee80211_get_txq(local, vif, sta, skb); |
bb42f2d1 THJ |
1600 | |
1601 | if (!txqi) | |
1602 | return false; | |
1603 | ||
bb42f2d1 THJ |
1604 | spin_lock_bh(&fq->lock); |
1605 | ieee80211_txq_enqueue(local, txqi, skb); | |
1606 | spin_unlock_bh(&fq->lock); | |
1607 | ||
e7881bd5 | 1608 | drv_wake_tx_queue(local, txqi); |
bb42f2d1 THJ |
1609 | |
1610 | return true; | |
1611 | } | |
1612 | ||
11127e91 JB |
1613 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1614 | struct ieee80211_vif *vif, | |
1615 | struct ieee80211_sta *sta, | |
1616 | struct sk_buff_head *skbs, | |
1617 | bool txpending) | |
e2ebc74d | 1618 | { |
80a83cfc | 1619 | struct ieee80211_tx_control control = {}; |
252b86c4 | 1620 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1621 | unsigned long flags; |
e2ebc74d | 1622 | |
252b86c4 | 1623 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1624 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1625 | int q = info->hw_queue; | |
1626 | ||
1627 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1628 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1629 | __skb_unlink(skb, skbs); | |
c3e7724b | 1630 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1631 | continue; |
1632 | } | |
1633 | #endif | |
3b8d81e0 JB |
1634 | |
1635 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1636 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1637 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1638 | if (unlikely(info->flags & |
a7679ed5 SF |
1639 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1640 | if (local->queue_stop_reasons[q] & | |
1641 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1642 | /* | |
1643 | * Drop off-channel frames if queues | |
1644 | * are stopped for any reason other | |
1645 | * than off-channel operation. Never | |
1646 | * queue them. | |
1647 | */ | |
1648 | spin_unlock_irqrestore( | |
1649 | &local->queue_stop_reason_lock, | |
1650 | flags); | |
1651 | ieee80211_purge_tx_queue(&local->hw, | |
1652 | skbs); | |
1653 | return true; | |
1654 | } | |
1655 | } else { | |
1656 | ||
6c17b77b | 1657 | /* |
a7679ed5 SF |
1658 | * Since queue is stopped, queue up frames for |
1659 | * later transmission from the tx-pending | |
1660 | * tasklet when the queue is woken again. | |
6c17b77b | 1661 | */ |
a7679ed5 SF |
1662 | if (txpending) |
1663 | skb_queue_splice_init(skbs, | |
1664 | &local->pending[q]); | |
1665 | else | |
1666 | skb_queue_splice_tail_init(skbs, | |
1667 | &local->pending[q]); | |
1668 | ||
1669 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1670 | flags); | |
1671 | return false; | |
6c17b77b | 1672 | } |
7bb45683 | 1673 | } |
3b8d81e0 | 1674 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1675 | |
11127e91 | 1676 | info->control.vif = vif; |
80a83cfc | 1677 | control.sta = sta; |
f0e72851 | 1678 | |
11127e91 | 1679 | __skb_unlink(skb, skbs); |
80a83cfc | 1680 | drv_tx(local, &control, skb); |
11127e91 | 1681 | } |
5061b0c2 | 1682 | |
11127e91 JB |
1683 | return true; |
1684 | } | |
1685 | ||
1686 | /* | |
1687 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1688 | */ | |
1689 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1690 | struct sk_buff_head *skbs, int led_len, | |
1691 | struct sta_info *sta, bool txpending) | |
1692 | { | |
1693 | struct ieee80211_tx_info *info; | |
1694 | struct ieee80211_sub_if_data *sdata; | |
1695 | struct ieee80211_vif *vif; | |
1696 | struct ieee80211_sta *pubsta; | |
1697 | struct sk_buff *skb; | |
1698 | bool result = true; | |
1699 | __le16 fc; | |
5061b0c2 | 1700 | |
11127e91 JB |
1701 | if (WARN_ON(skb_queue_empty(skbs))) |
1702 | return true; | |
ec25acc4 | 1703 | |
11127e91 JB |
1704 | skb = skb_peek(skbs); |
1705 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1706 | info = IEEE80211_SKB_CB(skb); | |
1707 | sdata = vif_to_sdata(info->control.vif); | |
1708 | if (sta && !sta->uploaded) | |
1709 | sta = NULL; | |
1710 | ||
1711 | if (sta) | |
1712 | pubsta = &sta->sta; | |
1713 | else | |
1714 | pubsta = NULL; | |
1715 | ||
1716 | switch (sdata->vif.type) { | |
1717 | case NL80211_IFTYPE_MONITOR: | |
d8212184 | 1718 | if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { |
c82b5a74 JB |
1719 | vif = &sdata->vif; |
1720 | break; | |
1721 | } | |
4b6f1dd6 | 1722 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1723 | if (sdata) { |
4b6f1dd6 | 1724 | vif = &sdata->vif; |
3a25a8c8 JB |
1725 | info->hw_queue = |
1726 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
30686bf7 | 1727 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { |
63b4d8b3 | 1728 | ieee80211_purge_tx_queue(&local->hw, skbs); |
3a25a8c8 JB |
1729 | return true; |
1730 | } else | |
4b6f1dd6 | 1731 | vif = NULL; |
11127e91 JB |
1732 | break; |
1733 | case NL80211_IFTYPE_AP_VLAN: | |
1734 | sdata = container_of(sdata->bss, | |
1735 | struct ieee80211_sub_if_data, u.ap); | |
1736 | /* fall through */ | |
1737 | default: | |
1738 | vif = &sdata->vif; | |
1739 | break; | |
e2ebc74d | 1740 | } |
2de8e0d9 | 1741 | |
cb831b53 JB |
1742 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1743 | txpending); | |
11127e91 | 1744 | |
74e4dbfd | 1745 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1746 | |
4db4e0a1 | 1747 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1748 | |
11127e91 | 1749 | return result; |
e2ebc74d JB |
1750 | } |
1751 | ||
97b045d6 JB |
1752 | /* |
1753 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1754 | * frame was dropped or queued. | |
bb42f2d1 THJ |
1755 | * |
1756 | * The handlers are split into an early and late part. The latter is everything | |
1757 | * that can be sensitive to reordering, and will be deferred to after packets | |
1758 | * are dequeued from the intermediate queues (when they are enabled). | |
97b045d6 | 1759 | */ |
bb42f2d1 | 1760 | static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx) |
97b045d6 | 1761 | { |
97b045d6 | 1762 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1763 | |
9aa4aee3 JB |
1764 | #define CALL_TXH(txh) \ |
1765 | do { \ | |
1766 | res = txh(tx); \ | |
1767 | if (res != TX_CONTINUE) \ | |
1768 | goto txh_done; \ | |
1769 | } while (0) | |
1770 | ||
5c1b98a5 | 1771 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1772 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1773 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1774 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1775 | CALL_TXH(ieee80211_tx_h_select_key); |
30686bf7 | 1776 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
af65cd96 | 1777 | CALL_TXH(ieee80211_tx_h_rate_ctrl); |
c6fcf6bc | 1778 | |
bb42f2d1 THJ |
1779 | txh_done: |
1780 | if (unlikely(res == TX_DROP)) { | |
1781 | I802_DEBUG_INC(tx->local->tx_handlers_drop); | |
1782 | if (tx->skb) | |
1783 | ieee80211_free_txskb(&tx->local->hw, tx->skb); | |
1784 | else | |
1785 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); | |
1786 | return -1; | |
1787 | } else if (unlikely(res == TX_QUEUED)) { | |
1788 | I802_DEBUG_INC(tx->local->tx_handlers_queued); | |
1789 | return -1; | |
1790 | } | |
1791 | ||
1792 | return 0; | |
1793 | } | |
1794 | ||
1795 | /* | |
1796 | * Late handlers can be called while the sta lock is held. Handlers that can | |
1797 | * cause packets to be generated will cause deadlock! | |
1798 | */ | |
1799 | static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx) | |
1800 | { | |
1801 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
1802 | ieee80211_tx_result res = TX_CONTINUE; | |
1803 | ||
aa5b5492 JB |
1804 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1805 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1806 | tx->skb = NULL; | |
c6fcf6bc | 1807 | goto txh_done; |
aa5b5492 | 1808 | } |
c6fcf6bc JB |
1809 | |
1810 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1811 | CALL_TXH(ieee80211_tx_h_sequence); |
1812 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1813 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1814 | CALL_TXH(ieee80211_tx_h_stats); |
1815 | CALL_TXH(ieee80211_tx_h_encrypt); | |
30686bf7 | 1816 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
8fd369ee | 1817 | CALL_TXH(ieee80211_tx_h_calculate_duration); |
d9e8a70f | 1818 | #undef CALL_TXH |
97b045d6 | 1819 | |
d9e8a70f | 1820 | txh_done: |
97b045d6 | 1821 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1822 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1823 | if (tx->skb) |
c3e7724b | 1824 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1825 | else |
1f98ab7f | 1826 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1827 | return -1; |
1828 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1829 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1830 | return -1; |
1831 | } | |
1832 | ||
1833 | return 0; | |
1834 | } | |
1835 | ||
bb42f2d1 THJ |
1836 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) |
1837 | { | |
1838 | int r = invoke_tx_handlers_early(tx); | |
1839 | ||
1840 | if (r) | |
1841 | return r; | |
1842 | return invoke_tx_handlers_late(tx); | |
1843 | } | |
1844 | ||
06be6b14 FF |
1845 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1846 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1847 | int band, struct ieee80211_sta **sta) | |
1848 | { | |
1849 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1850 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1851 | struct ieee80211_tx_data tx; | |
88724a81 | 1852 | struct sk_buff *skb2; |
06be6b14 | 1853 | |
7c10770f | 1854 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1855 | return false; |
1856 | ||
1857 | info->band = band; | |
1858 | info->control.vif = vif; | |
1859 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1860 | ||
1861 | if (invoke_tx_handlers(&tx)) | |
1862 | return false; | |
1863 | ||
1864 | if (sta) { | |
1865 | if (tx.sta) | |
1866 | *sta = &tx.sta->sta; | |
1867 | else | |
1868 | *sta = NULL; | |
1869 | } | |
1870 | ||
88724a81 JB |
1871 | /* this function isn't suitable for fragmented data frames */ |
1872 | skb2 = __skb_dequeue(&tx.skbs); | |
1873 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1874 | ieee80211_free_txskb(hw, skb2); | |
1875 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1876 | return false; | |
1877 | } | |
1878 | ||
06be6b14 FF |
1879 | return true; |
1880 | } | |
1881 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1882 | ||
7bb45683 JB |
1883 | /* |
1884 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1885 | */ | |
1886 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f | 1887 | struct sta_info *sta, struct sk_buff *skb, |
b9771d41 | 1888 | bool txpending, u32 txdata_flags) |
e2ebc74d | 1889 | { |
3b8d81e0 | 1890 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1891 | struct ieee80211_tx_data tx; |
97b045d6 | 1892 | ieee80211_tx_result res_prepare; |
e039fa4a | 1893 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1894 | bool result = true; |
74e4dbfd | 1895 | int led_len; |
e2ebc74d | 1896 | |
e2ebc74d JB |
1897 | if (unlikely(skb->len < 10)) { |
1898 | dev_kfree_skb(skb); | |
7bb45683 | 1899 | return true; |
e2ebc74d JB |
1900 | } |
1901 | ||
58d4185e | 1902 | /* initialises tx */ |
74e4dbfd | 1903 | led_len = skb->len; |
7c10770f | 1904 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1905 | |
b9771d41 JB |
1906 | tx.flags |= txdata_flags; |
1907 | ||
cd8ffc80 | 1908 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1909 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1910 | return true; |
cd8ffc80 | 1911 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1912 | return true; |
e2ebc74d JB |
1913 | } |
1914 | ||
3a25a8c8 JB |
1915 | /* set up hw_queue value early */ |
1916 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
30686bf7 | 1917 | !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
3a25a8c8 JB |
1918 | info->hw_queue = |
1919 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1920 | ||
bb42f2d1 | 1921 | if (invoke_tx_handlers_early(&tx)) |
6eae4a6c | 1922 | return true; |
bb42f2d1 THJ |
1923 | |
1924 | if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb)) | |
1925 | return true; | |
1926 | ||
1927 | if (!invoke_tx_handlers_late(&tx)) | |
74e4dbfd JB |
1928 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1929 | tx.sta, txpending); | |
55de908a | 1930 | |
7bb45683 | 1931 | return result; |
e2ebc74d JB |
1932 | } |
1933 | ||
1934 | /* device xmit handlers */ | |
1935 | ||
3bff1865 | 1936 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1937 | struct sk_buff *skb, |
1938 | int head_need, bool may_encrypt) | |
1939 | { | |
3bff1865 | 1940 | struct ieee80211_local *local = sdata->local; |
9d0f50b8 FF |
1941 | struct ieee80211_hdr *hdr; |
1942 | bool enc_tailroom; | |
23c0752a JB |
1943 | int tail_need = 0; |
1944 | ||
9d0f50b8 FF |
1945 | hdr = (struct ieee80211_hdr *) skb->data; |
1946 | enc_tailroom = may_encrypt && | |
1947 | (sdata->crypto_tx_tailroom_needed_cnt || | |
1948 | ieee80211_is_mgmt(hdr->frame_control)); | |
1949 | ||
1950 | if (enc_tailroom) { | |
23c0752a JB |
1951 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1952 | tail_need -= skb_tailroom(skb); | |
1953 | tail_need = max_t(int, tail_need, 0); | |
1954 | } | |
1955 | ||
c70f59a2 | 1956 | if (skb_cloned(skb) && |
30686bf7 | 1957 | (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) || |
9d0f50b8 | 1958 | !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom)) |
23c0752a | 1959 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1960 | else if (head_need || tail_need) |
23c0752a | 1961 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1962 | else |
1963 | return 0; | |
23c0752a JB |
1964 | |
1965 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1966 | wiphy_debug(local->hw.wiphy, |
1967 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1968 | return -ENOMEM; |
1969 | } | |
1970 | ||
23c0752a JB |
1971 | return 0; |
1972 | } | |
1973 | ||
7c10770f | 1974 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
b9771d41 JB |
1975 | struct sta_info *sta, struct sk_buff *skb, |
1976 | u32 txdata_flags) | |
e2ebc74d | 1977 | { |
3b8d81e0 | 1978 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1979 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
11b05ba3 | 1980 | struct ieee80211_hdr *hdr; |
e2ebc74d | 1981 | int headroom; |
23c0752a | 1982 | bool may_encrypt; |
e2ebc74d | 1983 | |
3b8d81e0 | 1984 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1985 | |
3b8d81e0 | 1986 | headroom = local->tx_headroom; |
23c0752a | 1987 | if (may_encrypt) |
2475b1cc | 1988 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1989 | headroom -= skb_headroom(skb); |
1990 | headroom = max_t(int, 0, headroom); | |
1991 | ||
3bff1865 | 1992 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1993 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1994 | return; |
e2ebc74d JB |
1995 | } |
1996 | ||
740c1aa3 | 1997 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1998 | info->control.vif = &sdata->vif; |
e2ebc74d | 1999 | |
3f52b7e3 MP |
2000 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2001 | if (ieee80211_is_data(hdr->frame_control) && | |
2002 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 2003 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
2004 | return; /* skb queued: don't free */ |
2005 | } else { | |
2006 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
2007 | } | |
98aed9fd | 2008 | } |
cca89496 | 2009 | |
2154c81c | 2010 | ieee80211_set_qos_hdr(sdata, skb); |
b9771d41 | 2011 | ieee80211_tx(sdata, sta, skb, false, txdata_flags); |
e2ebc74d JB |
2012 | } |
2013 | ||
dfdfc2be SE |
2014 | static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local, |
2015 | struct sk_buff *skb) | |
73b9f03a JB |
2016 | { |
2017 | struct ieee80211_radiotap_iterator iterator; | |
2018 | struct ieee80211_radiotap_header *rthdr = | |
2019 | (struct ieee80211_radiotap_header *) skb->data; | |
2020 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
dfdfc2be SE |
2021 | struct ieee80211_supported_band *sband = |
2022 | local->hw.wiphy->bands[info->band]; | |
73b9f03a JB |
2023 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, |
2024 | NULL); | |
2025 | u16 txflags; | |
dfdfc2be SE |
2026 | u16 rate = 0; |
2027 | bool rate_found = false; | |
2028 | u8 rate_retries = 0; | |
2029 | u16 rate_flags = 0; | |
f66b60f6 | 2030 | u8 mcs_known, mcs_flags, mcs_bw; |
646e76bb LB |
2031 | u16 vht_known; |
2032 | u8 vht_mcs = 0, vht_nss = 0; | |
dfdfc2be | 2033 | int i; |
73b9f03a JB |
2034 | |
2035 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
2036 | IEEE80211_TX_CTL_DONTFRAG; | |
2037 | ||
2038 | /* | |
2039 | * for every radiotap entry that is present | |
2040 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
2041 | * entries present, or -EINVAL on error) | |
2042 | */ | |
2043 | ||
2044 | while (!ret) { | |
2045 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
2046 | ||
2047 | if (ret) | |
2048 | continue; | |
2049 | ||
2050 | /* see if this argument is something we can use */ | |
2051 | switch (iterator.this_arg_index) { | |
2052 | /* | |
2053 | * You must take care when dereferencing iterator.this_arg | |
2054 | * for multibyte types... the pointer is not aligned. Use | |
2055 | * get_unaligned((type *)iterator.this_arg) to dereference | |
2056 | * iterator.this_arg for type "type" safely on all arches. | |
2057 | */ | |
2058 | case IEEE80211_RADIOTAP_FLAGS: | |
2059 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
2060 | /* | |
2061 | * this indicates that the skb we have been | |
2062 | * handed has the 32-bit FCS CRC at the end... | |
2063 | * we should react to that by snipping it off | |
2064 | * because it will be recomputed and added | |
2065 | * on transmission | |
2066 | */ | |
2067 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
2068 | return false; | |
2069 | ||
2070 | skb_trim(skb, skb->len - FCS_LEN); | |
2071 | } | |
2072 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
2073 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
2074 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
2075 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
2076 | break; | |
2077 | ||
2078 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
2079 | txflags = get_unaligned_le16(iterator.this_arg); | |
2080 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
2081 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
2082 | break; | |
2083 | ||
dfdfc2be SE |
2084 | case IEEE80211_RADIOTAP_RATE: |
2085 | rate = *iterator.this_arg; | |
2086 | rate_flags = 0; | |
2087 | rate_found = true; | |
2088 | break; | |
2089 | ||
2090 | case IEEE80211_RADIOTAP_DATA_RETRIES: | |
2091 | rate_retries = *iterator.this_arg; | |
2092 | break; | |
2093 | ||
2094 | case IEEE80211_RADIOTAP_MCS: | |
2095 | mcs_known = iterator.this_arg[0]; | |
2096 | mcs_flags = iterator.this_arg[1]; | |
2097 | if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS)) | |
2098 | break; | |
2099 | ||
2100 | rate_found = true; | |
2101 | rate = iterator.this_arg[2]; | |
2102 | rate_flags = IEEE80211_TX_RC_MCS; | |
2103 | ||
2104 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI && | |
2105 | mcs_flags & IEEE80211_RADIOTAP_MCS_SGI) | |
2106 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2107 | ||
f66b60f6 | 2108 | mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK; |
dfdfc2be | 2109 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW && |
f66b60f6 | 2110 | mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40) |
dfdfc2be SE |
2111 | rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2112 | break; | |
2113 | ||
646e76bb LB |
2114 | case IEEE80211_RADIOTAP_VHT: |
2115 | vht_known = get_unaligned_le16(iterator.this_arg); | |
2116 | rate_found = true; | |
2117 | ||
2118 | rate_flags = IEEE80211_TX_RC_VHT_MCS; | |
2119 | if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) && | |
2120 | (iterator.this_arg[2] & | |
2121 | IEEE80211_RADIOTAP_VHT_FLAG_SGI)) | |
2122 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2123 | if (vht_known & | |
2124 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) { | |
2125 | if (iterator.this_arg[3] == 1) | |
2126 | rate_flags |= | |
2127 | IEEE80211_TX_RC_40_MHZ_WIDTH; | |
2128 | else if (iterator.this_arg[3] == 4) | |
2129 | rate_flags |= | |
2130 | IEEE80211_TX_RC_80_MHZ_WIDTH; | |
2131 | else if (iterator.this_arg[3] == 11) | |
2132 | rate_flags |= | |
2133 | IEEE80211_TX_RC_160_MHZ_WIDTH; | |
2134 | } | |
2135 | ||
2136 | vht_mcs = iterator.this_arg[4] >> 4; | |
2137 | vht_nss = iterator.this_arg[4] & 0xF; | |
2138 | break; | |
2139 | ||
73b9f03a JB |
2140 | /* |
2141 | * Please update the file | |
2142 | * Documentation/networking/mac80211-injection.txt | |
2143 | * when parsing new fields here. | |
2144 | */ | |
2145 | ||
2146 | default: | |
2147 | break; | |
2148 | } | |
2149 | } | |
2150 | ||
2151 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
2152 | return false; | |
2153 | ||
dfdfc2be SE |
2154 | if (rate_found) { |
2155 | info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT; | |
2156 | ||
2157 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
2158 | info->control.rates[i].idx = -1; | |
2159 | info->control.rates[i].flags = 0; | |
2160 | info->control.rates[i].count = 0; | |
2161 | } | |
2162 | ||
2163 | if (rate_flags & IEEE80211_TX_RC_MCS) { | |
2164 | info->control.rates[0].idx = rate; | |
646e76bb LB |
2165 | } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) { |
2166 | ieee80211_rate_set_vht(info->control.rates, vht_mcs, | |
2167 | vht_nss); | |
dfdfc2be SE |
2168 | } else { |
2169 | for (i = 0; i < sband->n_bitrates; i++) { | |
2170 | if (rate * 5 != sband->bitrates[i].bitrate) | |
2171 | continue; | |
2172 | ||
2173 | info->control.rates[0].idx = i; | |
2174 | break; | |
2175 | } | |
2176 | } | |
2177 | ||
07310a63 FF |
2178 | if (info->control.rates[0].idx < 0) |
2179 | info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT; | |
2180 | ||
dfdfc2be SE |
2181 | info->control.rates[0].flags = rate_flags; |
2182 | info->control.rates[0].count = min_t(u8, rate_retries + 1, | |
2183 | local->hw.max_rate_tries); | |
2184 | } | |
2185 | ||
73b9f03a JB |
2186 | /* |
2187 | * remove the radiotap header | |
2188 | * iterator->_max_length was sanity-checked against | |
2189 | * skb->len by iterator init | |
2190 | */ | |
2191 | skb_pull(skb, iterator._max_length); | |
2192 | ||
2193 | return true; | |
2194 | } | |
2195 | ||
d0cf9c0d SH |
2196 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
2197 | struct net_device *dev) | |
e2ebc74d JB |
2198 | { |
2199 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 2200 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
2201 | struct ieee80211_radiotap_header *prthdr = |
2202 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 2203 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 2204 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 2205 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 2206 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 2207 | u16 len_rthdr; |
5d9cf4a5 | 2208 | int hdrlen; |
e2ebc74d | 2209 | |
9b8a74e3 AG |
2210 | /* check for not even having the fixed radiotap header part */ |
2211 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
2212 | goto fail; /* too short to be possibly valid */ | |
2213 | ||
2214 | /* is it a header version we can trust to find length from? */ | |
2215 | if (unlikely(prthdr->it_version)) | |
2216 | goto fail; /* only version 0 is supported */ | |
2217 | ||
2218 | /* then there must be a radiotap header with a length we can use */ | |
2219 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
2220 | ||
2221 | /* does the skb contain enough to deliver on the alleged length? */ | |
2222 | if (unlikely(skb->len < len_rthdr)) | |
2223 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 2224 | |
e2ebc74d JB |
2225 | /* |
2226 | * fix up the pointers accounting for the radiotap | |
2227 | * header still being in there. We are being given | |
2228 | * a precooked IEEE80211 header so no need for | |
2229 | * normal processing | |
2230 | */ | |
9b8a74e3 | 2231 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 2232 | /* |
9b8a74e3 AG |
2233 | * these are just fixed to the end of the rt area since we |
2234 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 2235 | */ |
9b8a74e3 AG |
2236 | skb_set_network_header(skb, len_rthdr); |
2237 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 2238 | |
5d9cf4a5 JB |
2239 | if (skb->len < len_rthdr + 2) |
2240 | goto fail; | |
2241 | ||
2242 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
2243 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
2244 | ||
2245 | if (skb->len < len_rthdr + hdrlen) | |
2246 | goto fail; | |
2247 | ||
f75f5c6f HS |
2248 | /* |
2249 | * Initialize skb->protocol if the injected frame is a data frame | |
2250 | * carrying a rfc1042 header | |
2251 | */ | |
5d9cf4a5 JB |
2252 | if (ieee80211_is_data(hdr->frame_control) && |
2253 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
2254 | u8 *payload = (u8 *)hdr + hdrlen; | |
2255 | ||
b203ca39 | 2256 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
2257 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
2258 | payload[7]); | |
f75f5c6f HS |
2259 | } |
2260 | ||
3b8d81e0 JB |
2261 | memset(info, 0, sizeof(*info)); |
2262 | ||
5d9cf4a5 | 2263 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
2264 | IEEE80211_TX_CTL_INJECTED; |
2265 | ||
5d9cf4a5 JB |
2266 | rcu_read_lock(); |
2267 | ||
2268 | /* | |
2269 | * We process outgoing injected frames that have a local address | |
2270 | * we handle as though they are non-injected frames. | |
2271 | * This code here isn't entirely correct, the local MAC address | |
2272 | * isn't always enough to find the interface to use; for proper | |
2273 | * VLAN/WDS support we will need a different mechanism (which | |
2274 | * likely isn't going to be monitor interfaces). | |
2275 | */ | |
2276 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2277 | ||
2278 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
2279 | if (!ieee80211_sdata_running(tmp_sdata)) | |
2280 | continue; | |
2281 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
2282 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
2283 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
2284 | continue; | |
b203ca39 | 2285 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
2286 | sdata = tmp_sdata; |
2287 | break; | |
2288 | } | |
2289 | } | |
7351c6bd | 2290 | |
55de908a JB |
2291 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2292 | if (!chanctx_conf) { | |
2293 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
2294 | if (tmp_sdata) | |
2295 | chanctx_conf = | |
2296 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
2297 | } | |
55de908a | 2298 | |
b4a7ff75 | 2299 | if (chanctx_conf) |
b4932836 | 2300 | chandef = &chanctx_conf->def; |
b4a7ff75 | 2301 | else if (!local->use_chanctx) |
b4932836 | 2302 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
2303 | else |
2304 | goto fail_rcu; | |
55de908a JB |
2305 | |
2306 | /* | |
2307 | * Frame injection is not allowed if beaconing is not allowed | |
2308 | * or if we need radar detection. Beaconing is usually not allowed when | |
2309 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
2310 | * Passive scan is also used in world regulatory domains where | |
2311 | * your country is not known and as such it should be treated as | |
2312 | * NO TX unless the channel is explicitly allowed in which case | |
2313 | * your current regulatory domain would not have the passive scan | |
2314 | * flag. | |
2315 | * | |
2316 | * Since AP mode uses monitor interfaces to inject/TX management | |
2317 | * frames we can make AP mode the exception to this rule once it | |
2318 | * supports radar detection as its implementation can deal with | |
2319 | * radar detection by itself. We can do that later by adding a | |
2320 | * monitor flag interfaces used for AP support. | |
2321 | */ | |
b4932836 JD |
2322 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
2323 | sdata->vif.type)) | |
55de908a JB |
2324 | goto fail_rcu; |
2325 | ||
73c4e195 | 2326 | info->band = chandef->chan->band; |
109843b0 LB |
2327 | |
2328 | /* process and remove the injection radiotap header */ | |
2329 | if (!ieee80211_parse_tx_radiotap(local, skb)) | |
2330 | goto fail_rcu; | |
2331 | ||
b9771d41 | 2332 | ieee80211_xmit(sdata, NULL, skb, 0); |
5d9cf4a5 JB |
2333 | rcu_read_unlock(); |
2334 | ||
e2ebc74d | 2335 | return NETDEV_TX_OK; |
9b8a74e3 | 2336 | |
55de908a JB |
2337 | fail_rcu: |
2338 | rcu_read_unlock(); | |
9b8a74e3 AG |
2339 | fail: |
2340 | dev_kfree_skb(skb); | |
2341 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
2342 | } |
2343 | ||
97ffe757 | 2344 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 2345 | { |
97ffe757 | 2346 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 2347 | |
97ffe757 JB |
2348 | return ethertype == ETH_P_TDLS && |
2349 | skb->len > 14 && | |
2350 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
2351 | } | |
2352 | ||
2353 | static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, | |
2354 | struct sk_buff *skb, | |
2355 | struct sta_info **sta_out) | |
2356 | { | |
2357 | struct sta_info *sta; | |
2358 | ||
2359 | switch (sdata->vif.type) { | |
2360 | case NL80211_IFTYPE_AP_VLAN: | |
2361 | sta = rcu_dereference(sdata->u.vlan.sta); | |
2362 | if (sta) { | |
2363 | *sta_out = sta; | |
2364 | return 0; | |
2365 | } else if (sdata->wdev.use_4addr) { | |
2366 | return -ENOLINK; | |
2367 | } | |
2368 | /* fall through */ | |
2369 | case NL80211_IFTYPE_AP: | |
2370 | case NL80211_IFTYPE_OCB: | |
2371 | case NL80211_IFTYPE_ADHOC: | |
2372 | if (is_multicast_ether_addr(skb->data)) { | |
2373 | *sta_out = ERR_PTR(-ENOENT); | |
2374 | return 0; | |
2375 | } | |
2376 | sta = sta_info_get_bss(sdata, skb->data); | |
2377 | break; | |
2378 | case NL80211_IFTYPE_WDS: | |
2379 | sta = sta_info_get(sdata, sdata->u.wds.remote_addr); | |
2380 | break; | |
2381 | #ifdef CONFIG_MAC80211_MESH | |
2382 | case NL80211_IFTYPE_MESH_POINT: | |
2383 | /* determined much later */ | |
2384 | *sta_out = NULL; | |
2385 | return 0; | |
2386 | #endif | |
2387 | case NL80211_IFTYPE_STATION: | |
2388 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
2389 | sta = sta_info_get(sdata, skb->data); | |
11d62caf JB |
2390 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { |
2391 | if (test_sta_flag(sta, | |
2392 | WLAN_STA_TDLS_PEER_AUTH)) { | |
97ffe757 JB |
2393 | *sta_out = sta; |
2394 | return 0; | |
2395 | } | |
2396 | ||
2397 | /* | |
2398 | * TDLS link during setup - throw out frames to | |
2399 | * peer. Allow TDLS-setup frames to unauthorized | |
2400 | * peers for the special case of a link teardown | |
2401 | * after a TDLS sta is removed due to being | |
2402 | * unreachable. | |
2403 | */ | |
11d62caf | 2404 | if (!ieee80211_is_tdls_setup(skb)) |
97ffe757 JB |
2405 | return -EINVAL; |
2406 | } | |
2407 | ||
2408 | } | |
2409 | ||
2410 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
2411 | if (!sta) | |
2412 | return -ENOLINK; | |
2413 | break; | |
2414 | default: | |
2415 | return -EINVAL; | |
2416 | } | |
2417 | ||
2418 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
2419 | return 0; | |
ad38bfc9 MG |
2420 | } |
2421 | ||
e2ebc74d | 2422 | /** |
4c9451ed JB |
2423 | * ieee80211_build_hdr - build 802.11 header in the given frame |
2424 | * @sdata: virtual interface to build the header for | |
2425 | * @skb: the skb to build the header in | |
24d342c5 | 2426 | * @info_flags: skb flags to set |
e2ebc74d | 2427 | * |
4c9451ed JB |
2428 | * This function takes the skb with 802.3 header and reformats the header to |
2429 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
2430 | * being transmitted on. | |
2431 | * | |
2432 | * Note that this function also takes care of the TX status request and | |
2433 | * potential unsharing of the SKB - this needs to be interleaved with the | |
2434 | * header building. | |
e2ebc74d | 2435 | * |
4c9451ed JB |
2436 | * The function requires the read-side RCU lock held |
2437 | * | |
2438 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 2439 | */ |
4c9451ed | 2440 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 2441 | struct sk_buff *skb, u32 info_flags, |
97ffe757 | 2442 | struct sta_info *sta) |
e2ebc74d | 2443 | { |
133b8226 | 2444 | struct ieee80211_local *local = sdata->local; |
489ee919 | 2445 | struct ieee80211_tx_info *info; |
dcf33963 | 2446 | int head_need; |
065e9605 HH |
2447 | u16 ethertype, hdrlen, meshhdrlen = 0; |
2448 | __le16 fc; | |
e2ebc74d | 2449 | struct ieee80211_hdr hdr; |
ff67bb86 | 2450 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 2451 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
2452 | const u8 *encaps_data; |
2453 | int encaps_len, skip_header_bytes; | |
97ffe757 JB |
2454 | bool wme_sta = false, authorized = false; |
2455 | bool tdls_peer; | |
a729cff8 | 2456 | bool multicast; |
a729cff8 | 2457 | u16 info_id = 0; |
55de908a JB |
2458 | struct ieee80211_chanctx_conf *chanctx_conf; |
2459 | struct ieee80211_sub_if_data *ap_sdata; | |
57fbcce3 | 2460 | enum nl80211_band band; |
4c9451ed | 2461 | int ret; |
e2ebc74d | 2462 | |
97ffe757 JB |
2463 | if (IS_ERR(sta)) |
2464 | sta = NULL; | |
2465 | ||
e2ebc74d JB |
2466 | /* convert Ethernet header to proper 802.11 header (based on |
2467 | * operation mode) */ | |
2468 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 2469 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 2470 | |
51fb61e7 | 2471 | switch (sdata->vif.type) { |
05c914fe | 2472 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 2473 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
2474 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
2475 | /* RA TA DA SA */ | |
2476 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 2477 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2478 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2479 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2480 | hdrlen = 30; | |
c2c98fde | 2481 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 2482 | wme_sta = sta->sta.wme; |
f14543ee | 2483 | } |
55de908a JB |
2484 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
2485 | u.ap); | |
2486 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
2487 | if (!chanctx_conf) { |
2488 | ret = -ENOTCONN; | |
2489 | goto free; | |
2490 | } | |
4bf88530 | 2491 | band = chanctx_conf->def.chan->band; |
97ffe757 | 2492 | if (sdata->wdev.use_4addr) |
f14543ee FF |
2493 | break; |
2494 | /* fall through */ | |
2495 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
2496 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
2497 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2498 | if (!chanctx_conf) { |
2499 | ret = -ENOTCONN; | |
2500 | goto free; | |
2501 | } | |
065e9605 | 2502 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
2503 | /* DA BSSID SA */ |
2504 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 2505 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2506 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
2507 | hdrlen = 24; | |
4bf88530 | 2508 | band = chanctx_conf->def.chan->band; |
cf966838 | 2509 | break; |
05c914fe | 2510 | case NL80211_IFTYPE_WDS: |
065e9605 | 2511 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
2512 | /* RA TA DA SA */ |
2513 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 2514 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2515 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2516 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2517 | hdrlen = 30; | |
55de908a JB |
2518 | /* |
2519 | * This is the exception! WDS style interfaces are prohibited | |
2520 | * when channel contexts are in used so this must be valid | |
2521 | */ | |
675a0b04 | 2522 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 2523 | break; |
33b64eb2 | 2524 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 2525 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 2526 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
2527 | struct sta_info *next_hop; |
2528 | bool mpp_lookup = true; | |
2529 | ||
bf7cd94d | 2530 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
2531 | if (mpath) { |
2532 | mpp_lookup = false; | |
2533 | next_hop = rcu_dereference(mpath->next_hop); | |
2534 | if (!next_hop || | |
2535 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
2536 | MESH_PATH_RESOLVING))) | |
2537 | mpp_lookup = true; | |
2538 | } | |
2539 | ||
ab1c7906 | 2540 | if (mpp_lookup) { |
bf7cd94d | 2541 | mppath = mpp_path_lookup(sdata, skb->data); |
ab1c7906 HR |
2542 | if (mppath) |
2543 | mppath->exp_time = jiffies; | |
2544 | } | |
163df6cf CYY |
2545 | |
2546 | if (mppath && mpath) | |
2bdaf386 | 2547 | mesh_path_del(sdata, mpath->dst); |
b8bacc18 | 2548 | } |
79617dee | 2549 | |
f76b57b4 | 2550 | /* |
9d52501b JF |
2551 | * Use address extension if it is a packet from |
2552 | * another interface or if we know the destination | |
2553 | * is being proxied by a portal (i.e. portal address | |
2554 | * differs from proxied address) | |
f76b57b4 | 2555 | */ |
b203ca39 JP |
2556 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2557 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2558 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2559 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2560 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2561 | NULL, NULL); | |
79617dee | 2562 | } else { |
27f01124 TP |
2563 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2564 | * For unicast with unknown forwarding information, | |
2565 | * destination might be in the MBSS or if that fails | |
2566 | * forwarded to another mesh gate. In either case | |
2567 | * resolution will be handled in ieee80211_xmit(), so | |
2568 | * leave the original DA. This also works for mcast */ | |
2569 | const u8 *mesh_da = skb->data; | |
2570 | ||
2571 | if (mppath) | |
2572 | mesh_da = mppath->mpp; | |
2573 | else if (mpath) | |
2574 | mesh_da = mpath->dst; | |
79617dee | 2575 | |
3c5772a5 | 2576 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2577 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2578 | if (is_multicast_ether_addr(mesh_da)) |
2579 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2580 | meshhdrlen = ieee80211_new_mesh_header( |
2581 | sdata, &mesh_hdr, | |
2582 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2583 | else |
27f01124 | 2584 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2585 | meshhdrlen = ieee80211_new_mesh_header( |
2586 | sdata, &mesh_hdr, skb->data, | |
2587 | skb->data + ETH_ALEN); | |
79617dee | 2588 | |
79617dee | 2589 | } |
55de908a | 2590 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2591 | if (!chanctx_conf) { |
2592 | ret = -ENOTCONN; | |
2593 | goto free; | |
2594 | } | |
4bf88530 | 2595 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
2596 | break; |
2597 | #endif | |
05c914fe | 2598 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2599 | /* we already did checks when looking up the RA STA */ |
2600 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2601 | |
97ffe757 | 2602 | if (tdls_peer) { |
941c93cd AN |
2603 | /* DA SA BSSID */ |
2604 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2605 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2606 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2607 | hdrlen = 24; | |
2608 | } else if (sdata->u.mgd.use_4addr && | |
2609 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2610 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2611 | IEEE80211_FCTL_TODS); | |
f14543ee | 2612 | /* RA TA DA SA */ |
941c93cd | 2613 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2614 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2615 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2616 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2617 | hdrlen = 30; | |
2618 | } else { | |
2619 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2620 | /* BSSID SA DA */ | |
941c93cd | 2621 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2622 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2623 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2624 | hdrlen = 24; | |
2625 | } | |
55de908a | 2626 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2627 | if (!chanctx_conf) { |
2628 | ret = -ENOTCONN; | |
2629 | goto free; | |
2630 | } | |
4bf88530 | 2631 | band = chanctx_conf->def.chan->band; |
cf966838 | 2632 | break; |
239281f8 RL |
2633 | case NL80211_IFTYPE_OCB: |
2634 | /* DA SA BSSID */ | |
2635 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2636 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2637 | eth_broadcast_addr(hdr.addr3); | |
2638 | hdrlen = 24; | |
2639 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2640 | if (!chanctx_conf) { |
2641 | ret = -ENOTCONN; | |
2642 | goto free; | |
2643 | } | |
239281f8 RL |
2644 | band = chanctx_conf->def.chan->band; |
2645 | break; | |
05c914fe | 2646 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2647 | /* DA SA BSSID */ |
2648 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2649 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2650 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2651 | hdrlen = 24; |
55de908a | 2652 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2653 | if (!chanctx_conf) { |
2654 | ret = -ENOTCONN; | |
2655 | goto free; | |
2656 | } | |
4bf88530 | 2657 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2658 | break; |
2659 | default: | |
4c9451ed JB |
2660 | ret = -EINVAL; |
2661 | goto free; | |
e2ebc74d JB |
2662 | } |
2663 | ||
a729cff8 | 2664 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2665 | |
97ffe757 JB |
2666 | /* sta is always NULL for mesh */ |
2667 | if (sta) { | |
2668 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2669 | wme_sta = sta->sta.wme; | |
2670 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2671 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2672 | wme_sta = true; |
97ffe757 | 2673 | } |
4777be41 | 2674 | |
527871d7 JB |
2675 | /* receiver does QoS (which also means we do) use it */ |
2676 | if (wme_sta) { | |
065e9605 | 2677 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2678 | hdrlen += 2; |
2679 | } | |
2680 | ||
2681 | /* | |
238814fd JB |
2682 | * Drop unicast frames to unauthorised stations unless they are |
2683 | * EAPOL frames from the local station. | |
ce3edf6d | 2684 | */ |
55182e4a | 2685 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2686 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2687 | !multicast && !authorized && |
55182e4a | 2688 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2689 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2690 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2691 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2692 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2693 | #endif |
2694 | ||
2695 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2696 | ||
4c9451ed JB |
2697 | ret = -EPERM; |
2698 | goto free; | |
ce3edf6d JB |
2699 | } |
2700 | ||
a729cff8 JB |
2701 | if (unlikely(!multicast && skb->sk && |
2702 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2703 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2704 | |
bf7fa551 | 2705 | if (ack_skb) { |
a729cff8 | 2706 | unsigned long flags; |
9475af6e | 2707 | int id; |
a729cff8 JB |
2708 | |
2709 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2710 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2711 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2712 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2713 | ||
9475af6e | 2714 | if (id >= 0) { |
a729cff8 JB |
2715 | info_id = id; |
2716 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2717 | } else { |
bf7fa551 | 2718 | kfree_skb(ack_skb); |
a729cff8 | 2719 | } |
a729cff8 JB |
2720 | } |
2721 | } | |
2722 | ||
7e244707 HS |
2723 | /* |
2724 | * If the skb is shared we need to obtain our own copy. | |
2725 | */ | |
2726 | if (skb_shared(skb)) { | |
a729cff8 JB |
2727 | struct sk_buff *tmp_skb = skb; |
2728 | ||
2729 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2730 | WARN_ON(info_id); | |
2731 | ||
f8a0a781 | 2732 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2733 | kfree_skb(tmp_skb); |
2734 | ||
4c9451ed JB |
2735 | if (!skb) { |
2736 | ret = -ENOMEM; | |
2737 | goto free; | |
2738 | } | |
7e244707 HS |
2739 | } |
2740 | ||
065e9605 | 2741 | hdr.frame_control = fc; |
e2ebc74d JB |
2742 | hdr.duration_id = 0; |
2743 | hdr.seq_ctrl = 0; | |
2744 | ||
2745 | skip_header_bytes = ETH_HLEN; | |
2746 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2747 | encaps_data = bridge_tunnel_header; | |
2748 | encaps_len = sizeof(bridge_tunnel_header); | |
2749 | skip_header_bytes -= 2; | |
e5c5d22e | 2750 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2751 | encaps_data = rfc1042_header; |
2752 | encaps_len = sizeof(rfc1042_header); | |
2753 | skip_header_bytes -= 2; | |
2754 | } else { | |
2755 | encaps_data = NULL; | |
2756 | encaps_len = 0; | |
2757 | } | |
2758 | ||
2759 | skb_pull(skb, skip_header_bytes); | |
23c0752a | 2760 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2761 | |
23c0752a JB |
2762 | /* |
2763 | * So we need to modify the skb header and hence need a copy of | |
2764 | * that. The head_need variable above doesn't, so far, include | |
2765 | * the needed header space that we don't need right away. If we | |
2766 | * can, then we don't reallocate right now but only after the | |
2767 | * frame arrives at the master device (if it does...) | |
2768 | * | |
2769 | * If we cannot, however, then we will reallocate to include all | |
2770 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2771 | * make it big enough for everything we may ever need. | |
2772 | */ | |
e2ebc74d | 2773 | |
3a5be7d4 | 2774 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2775 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2776 | head_need += local->tx_headroom; |
2777 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2778 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2779 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2780 | skb = NULL; |
4c9451ed | 2781 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2782 | } |
e2ebc74d JB |
2783 | } |
2784 | ||
eae4430e | 2785 | if (encaps_data) |
e2ebc74d | 2786 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
c29b9b9b | 2787 | |
e4ab7eb0 | 2788 | #ifdef CONFIG_MAC80211_MESH |
eae4430e | 2789 | if (meshhdrlen > 0) |
33b64eb2 | 2790 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); |
e4ab7eb0 | 2791 | #endif |
33b64eb2 | 2792 | |
065e9605 | 2793 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2794 | __le16 *qos_control; |
2795 | ||
d58ff351 | 2796 | qos_control = skb_push(skb, 2); |
c29b9b9b JB |
2797 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2798 | /* | |
2799 | * Maybe we could actually set some fields here, for now just | |
2800 | * initialise to zero to indicate no special operation. | |
2801 | */ | |
2802 | *qos_control = 0; | |
2803 | } else | |
2804 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2805 | ||
d57a544d | 2806 | skb_reset_mac_header(skb); |
e2ebc74d | 2807 | |
489ee919 | 2808 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2809 | memset(info, 0, sizeof(*info)); |
2810 | ||
a729cff8 JB |
2811 | info->flags = info_flags; |
2812 | info->ack_frame_id = info_id; | |
73c4e195 | 2813 | info->band = band; |
a729cff8 | 2814 | |
4c9451ed JB |
2815 | return skb; |
2816 | free: | |
2817 | kfree_skb(skb); | |
2818 | return ERR_PTR(ret); | |
2819 | } | |
2820 | ||
17c18bf8 JB |
2821 | /* |
2822 | * fast-xmit overview | |
2823 | * | |
2824 | * The core idea of this fast-xmit is to remove per-packet checks by checking | |
2825 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band | |
2826 | * checks that are needed to get the sta->fast_tx pointer assigned, after which | |
2827 | * much less work can be done per packet. For example, fragmentation must be | |
2828 | * disabled or the fast_tx pointer will not be set. All the conditions are seen | |
2829 | * in the code here. | |
2830 | * | |
2831 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 | |
2832 | * header and other data to aid packet processing in ieee80211_xmit_fast(). | |
2833 | * | |
2834 | * The most difficult part of this is that when any of these assumptions | |
2835 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), | |
2836 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, | |
2837 | * since the per-packet code no longer checks the conditions. This is reflected | |
2838 | * by the calls to these functions throughout the rest of the code, and must be | |
2839 | * maintained if any of the TX path checks change. | |
2840 | */ | |
2841 | ||
2842 | void ieee80211_check_fast_xmit(struct sta_info *sta) | |
2843 | { | |
2844 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; | |
2845 | struct ieee80211_local *local = sta->local; | |
2846 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2847 | struct ieee80211_hdr *hdr = (void *)build.hdr; | |
2848 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2849 | __le16 fc; | |
2850 | ||
30686bf7 | 2851 | if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT)) |
17c18bf8 JB |
2852 | return; |
2853 | ||
2854 | /* Locking here protects both the pointer itself, and against concurrent | |
2855 | * invocations winning data access races to, e.g., the key pointer that | |
2856 | * is used. | |
2857 | * Without it, the invocation of this function right after the key | |
2858 | * pointer changes wouldn't be sufficient, as another CPU could access | |
2859 | * the pointer, then stall, and then do the cache update after the CPU | |
2860 | * that invalidated the key. | |
2861 | * With the locking, such scenarios cannot happen as the check for the | |
2862 | * key and the fast-tx assignment are done atomically, so the CPU that | |
2863 | * modifies the key will either wait or other one will see the key | |
2864 | * cleared/changed already. | |
2865 | */ | |
2866 | spin_lock_bh(&sta->lock); | |
30686bf7 JB |
2867 | if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) && |
2868 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) && | |
17c18bf8 JB |
2869 | sdata->vif.type == NL80211_IFTYPE_STATION) |
2870 | goto out; | |
2871 | ||
2872 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2873 | goto out; | |
2874 | ||
2875 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
2876 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
f7418bc1 FF |
2877 | test_sta_flag(sta, WLAN_STA_PS_DELIVER) || |
2878 | test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT)) | |
17c18bf8 JB |
2879 | goto out; |
2880 | ||
2881 | if (sdata->noack_map) | |
2882 | goto out; | |
2883 | ||
2884 | /* fast-xmit doesn't handle fragmentation at all */ | |
725b812c | 2885 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
f3fe4e93 | 2886 | !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG)) |
17c18bf8 JB |
2887 | goto out; |
2888 | ||
2889 | rcu_read_lock(); | |
2890 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2891 | if (!chanctx_conf) { | |
2892 | rcu_read_unlock(); | |
2893 | goto out; | |
2894 | } | |
2895 | build.band = chanctx_conf->def.chan->band; | |
2896 | rcu_read_unlock(); | |
2897 | ||
2898 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
2899 | ||
2900 | switch (sdata->vif.type) { | |
3ffd8840 JB |
2901 | case NL80211_IFTYPE_ADHOC: |
2902 | /* DA SA BSSID */ | |
2903 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2904 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2905 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); | |
2906 | build.hdr_len = 24; | |
2907 | break; | |
17c18bf8 JB |
2908 | case NL80211_IFTYPE_STATION: |
2909 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { | |
2910 | /* DA SA BSSID */ | |
2911 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2912 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2913 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2914 | build.hdr_len = 24; | |
2915 | break; | |
2916 | } | |
2917 | ||
2918 | if (sdata->u.mgd.use_4addr) { | |
2919 | /* non-regular ethertype cannot use the fastpath */ | |
2920 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2921 | IEEE80211_FCTL_TODS); | |
2922 | /* RA TA DA SA */ | |
2923 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2924 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2925 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2926 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2927 | build.hdr_len = 30; | |
2928 | break; | |
2929 | } | |
2930 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2931 | /* BSSID SA DA */ | |
2932 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2933 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2934 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2935 | build.hdr_len = 24; | |
2936 | break; | |
2937 | case NL80211_IFTYPE_AP_VLAN: | |
2938 | if (sdata->wdev.use_4addr) { | |
2939 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2940 | IEEE80211_FCTL_TODS); | |
2941 | /* RA TA DA SA */ | |
2942 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); | |
2943 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2944 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2945 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2946 | build.hdr_len = 30; | |
2947 | break; | |
2948 | } | |
2949 | /* fall through */ | |
2950 | case NL80211_IFTYPE_AP: | |
2951 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
2952 | /* DA BSSID SA */ | |
2953 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2954 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2955 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
2956 | build.hdr_len = 24; | |
2957 | break; | |
2958 | default: | |
2959 | /* not handled on fast-xmit */ | |
2960 | goto out; | |
2961 | } | |
2962 | ||
2963 | if (sta->sta.wme) { | |
2964 | build.hdr_len += 2; | |
2965 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
2966 | } | |
2967 | ||
2968 | /* We store the key here so there's no point in using rcu_dereference() | |
2969 | * but that's fine because the code that changes the pointers will call | |
2970 | * this function after doing so. For a single CPU that would be enough, | |
2971 | * for multiple see the comment above. | |
2972 | */ | |
2973 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); | |
2974 | if (!build.key) | |
2975 | build.key = rcu_access_pointer(sdata->default_unicast_key); | |
2976 | if (build.key) { | |
e495c247 | 2977 | bool gen_iv, iv_spc, mmic; |
17c18bf8 JB |
2978 | |
2979 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; | |
2980 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; | |
9de18d81 DS |
2981 | mmic = build.key->conf.flags & |
2982 | (IEEE80211_KEY_FLAG_GENERATE_MMIC | | |
2983 | IEEE80211_KEY_FLAG_PUT_MIC_SPACE); | |
17c18bf8 JB |
2984 | |
2985 | /* don't handle software crypto */ | |
2986 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
2987 | goto out; | |
2988 | ||
62872a9b AW |
2989 | /* Key is being removed */ |
2990 | if (build.key->flags & KEY_FLAG_TAINTED) | |
2991 | goto out; | |
2992 | ||
17c18bf8 JB |
2993 | switch (build.key->conf.cipher) { |
2994 | case WLAN_CIPHER_SUITE_CCMP: | |
2995 | case WLAN_CIPHER_SUITE_CCMP_256: | |
2996 | /* add fixed key ID */ | |
2997 | if (gen_iv) { | |
2998 | (build.hdr + build.hdr_len)[3] = | |
2999 | 0x20 | (build.key->conf.keyidx << 6); | |
3000 | build.pn_offs = build.hdr_len; | |
3001 | } | |
3002 | if (gen_iv || iv_spc) | |
3003 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; | |
3004 | break; | |
3005 | case WLAN_CIPHER_SUITE_GCMP: | |
3006 | case WLAN_CIPHER_SUITE_GCMP_256: | |
3007 | /* add fixed key ID */ | |
3008 | if (gen_iv) { | |
3009 | (build.hdr + build.hdr_len)[3] = | |
3010 | 0x20 | (build.key->conf.keyidx << 6); | |
3011 | build.pn_offs = build.hdr_len; | |
3012 | } | |
3013 | if (gen_iv || iv_spc) | |
3014 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; | |
3015 | break; | |
e495c247 JB |
3016 | case WLAN_CIPHER_SUITE_TKIP: |
3017 | /* cannot handle MMIC or IV generation in xmit-fast */ | |
3018 | if (mmic || gen_iv) | |
3019 | goto out; | |
3020 | if (iv_spc) | |
3021 | build.hdr_len += IEEE80211_TKIP_IV_LEN; | |
3022 | break; | |
3023 | case WLAN_CIPHER_SUITE_WEP40: | |
3024 | case WLAN_CIPHER_SUITE_WEP104: | |
3025 | /* cannot handle IV generation in fast-xmit */ | |
3026 | if (gen_iv) | |
3027 | goto out; | |
3028 | if (iv_spc) | |
3029 | build.hdr_len += IEEE80211_WEP_IV_LEN; | |
3030 | break; | |
3031 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
3032 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
3033 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
3034 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3035 | WARN(1, | |
3036 | "management cipher suite 0x%x enabled for data\n", | |
3037 | build.key->conf.cipher); | |
17c18bf8 | 3038 | goto out; |
e495c247 JB |
3039 | default: |
3040 | /* we don't know how to generate IVs for this at all */ | |
3041 | if (WARN_ON(gen_iv)) | |
3042 | goto out; | |
3043 | /* pure hardware keys are OK, of course */ | |
3044 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) | |
3045 | break; | |
3046 | /* cipher scheme might require space allocation */ | |
3047 | if (iv_spc && | |
3048 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) | |
3049 | goto out; | |
3050 | if (iv_spc) | |
3051 | build.hdr_len += build.key->conf.iv_len; | |
17c18bf8 JB |
3052 | } |
3053 | ||
3054 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
3055 | } | |
3056 | ||
3057 | hdr->frame_control = fc; | |
3058 | ||
3059 | memcpy(build.hdr + build.hdr_len, | |
3060 | rfc1042_header, sizeof(rfc1042_header)); | |
3061 | build.hdr_len += sizeof(rfc1042_header); | |
3062 | ||
3063 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); | |
3064 | /* if the kmemdup fails, continue w/o fast_tx */ | |
3065 | if (!fast_tx) | |
3066 | goto out; | |
3067 | ||
3068 | out: | |
3069 | /* we might have raced against another call to this function */ | |
3070 | old = rcu_dereference_protected(sta->fast_tx, | |
3071 | lockdep_is_held(&sta->lock)); | |
3072 | rcu_assign_pointer(sta->fast_tx, fast_tx); | |
3073 | if (old) | |
3074 | kfree_rcu(old, rcu_head); | |
3075 | spin_unlock_bh(&sta->lock); | |
3076 | } | |
3077 | ||
3078 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) | |
3079 | { | |
3080 | struct sta_info *sta; | |
3081 | ||
3082 | rcu_read_lock(); | |
3083 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
3084 | ieee80211_check_fast_xmit(sta); | |
3085 | rcu_read_unlock(); | |
3086 | } | |
3087 | ||
3088 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) | |
3089 | { | |
3090 | struct ieee80211_local *local = sdata->local; | |
3091 | struct sta_info *sta; | |
3092 | ||
3093 | rcu_read_lock(); | |
3094 | ||
3095 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3096 | if (sdata != sta->sdata && | |
3097 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
3098 | continue; | |
3099 | ieee80211_check_fast_xmit(sta); | |
3100 | } | |
3101 | ||
3102 | rcu_read_unlock(); | |
3103 | } | |
3104 | ||
3105 | void ieee80211_clear_fast_xmit(struct sta_info *sta) | |
3106 | { | |
3107 | struct ieee80211_fast_tx *fast_tx; | |
3108 | ||
3109 | spin_lock_bh(&sta->lock); | |
3110 | fast_tx = rcu_dereference_protected(sta->fast_tx, | |
3111 | lockdep_is_held(&sta->lock)); | |
3112 | RCU_INIT_POINTER(sta->fast_tx, NULL); | |
3113 | spin_unlock_bh(&sta->lock); | |
3114 | ||
3115 | if (fast_tx) | |
3116 | kfree_rcu(fast_tx, rcu_head); | |
3117 | } | |
3118 | ||
6e0456b5 | 3119 | static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local, |
166ac9d5 | 3120 | struct sk_buff *skb, int headroom) |
6e0456b5 | 3121 | { |
166ac9d5 | 3122 | if (skb_headroom(skb) < headroom) { |
6e0456b5 FF |
3123 | I802_DEBUG_INC(local->tx_expand_skb_head); |
3124 | ||
166ac9d5 | 3125 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { |
6e0456b5 FF |
3126 | wiphy_debug(local->hw.wiphy, |
3127 | "failed to reallocate TX buffer\n"); | |
3128 | return false; | |
3129 | } | |
3130 | } | |
3131 | ||
6e0456b5 FF |
3132 | return true; |
3133 | } | |
3134 | ||
3135 | static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata, | |
3136 | struct ieee80211_fast_tx *fast_tx, | |
3137 | struct sk_buff *skb) | |
3138 | { | |
3139 | struct ieee80211_local *local = sdata->local; | |
3140 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3141 | struct ieee80211_hdr *hdr; | |
06f2bb1e | 3142 | struct ethhdr *amsdu_hdr; |
6e0456b5 FF |
3143 | int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header); |
3144 | int subframe_len = skb->len - hdr_len; | |
3145 | void *data; | |
06f2bb1e | 3146 | u8 *qc, *h_80211_src, *h_80211_dst; |
a3e2f4b6 | 3147 | const u8 *bssid; |
6e0456b5 FF |
3148 | |
3149 | if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) | |
3150 | return false; | |
3151 | ||
3152 | if (info->control.flags & IEEE80211_TX_CTRL_AMSDU) | |
3153 | return true; | |
3154 | ||
166ac9d5 | 3155 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr))) |
6e0456b5 FF |
3156 | return false; |
3157 | ||
06f2bb1e MB |
3158 | data = skb_push(skb, sizeof(*amsdu_hdr)); |
3159 | memmove(data, data + sizeof(*amsdu_hdr), hdr_len); | |
3160 | hdr = data; | |
3161 | amsdu_hdr = data + hdr_len; | |
3162 | /* h_80211_src/dst is addr* field within hdr */ | |
3163 | h_80211_src = data + fast_tx->sa_offs; | |
3164 | h_80211_dst = data + fast_tx->da_offs; | |
6e0456b5 | 3165 | |
06f2bb1e MB |
3166 | amsdu_hdr->h_proto = cpu_to_be16(subframe_len); |
3167 | ether_addr_copy(amsdu_hdr->h_source, h_80211_src); | |
3168 | ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst); | |
6e0456b5 | 3169 | |
a3e2f4b6 MB |
3170 | /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA |
3171 | * fields needs to be changed to BSSID for A-MSDU frames depending | |
3172 | * on FromDS/ToDS values. | |
3173 | */ | |
3174 | switch (sdata->vif.type) { | |
3175 | case NL80211_IFTYPE_STATION: | |
3176 | bssid = sdata->u.mgd.bssid; | |
3177 | break; | |
3178 | case NL80211_IFTYPE_AP: | |
3179 | case NL80211_IFTYPE_AP_VLAN: | |
3180 | bssid = sdata->vif.addr; | |
3181 | break; | |
3182 | default: | |
3183 | bssid = NULL; | |
3184 | } | |
3185 | ||
3186 | if (bssid && ieee80211_has_fromds(hdr->frame_control)) | |
3187 | ether_addr_copy(h_80211_src, bssid); | |
3188 | ||
3189 | if (bssid && ieee80211_has_tods(hdr->frame_control)) | |
3190 | ether_addr_copy(h_80211_dst, bssid); | |
3191 | ||
6e0456b5 FF |
3192 | qc = ieee80211_get_qos_ctl(hdr); |
3193 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
3194 | ||
3195 | info->control.flags |= IEEE80211_TX_CTRL_AMSDU; | |
3196 | ||
3197 | return true; | |
3198 | } | |
3199 | ||
3200 | static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, | |
3201 | struct sta_info *sta, | |
3202 | struct ieee80211_fast_tx *fast_tx, | |
3203 | struct sk_buff *skb) | |
3204 | { | |
3205 | struct ieee80211_local *local = sdata->local; | |
fa962b92 MK |
3206 | struct fq *fq = &local->fq; |
3207 | struct fq_tin *tin; | |
3208 | struct fq_flow *flow; | |
6e0456b5 FF |
3209 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
3210 | struct ieee80211_txq *txq = sta->sta.txq[tid]; | |
3211 | struct txq_info *txqi; | |
3212 | struct sk_buff **frag_tail, *head; | |
3213 | int subframe_len = skb->len - ETH_ALEN; | |
3214 | u8 max_subframes = sta->sta.max_amsdu_subframes; | |
3215 | int max_frags = local->hw.max_tx_fragments; | |
3216 | int max_amsdu_len = sta->sta.max_amsdu_len; | |
3217 | __be16 len; | |
3218 | void *data; | |
3219 | bool ret = false; | |
fa962b92 | 3220 | unsigned int orig_len; |
66eb02d8 | 3221 | int n = 2, nfrags, pad = 0; |
166ac9d5 | 3222 | u16 hdrlen; |
6e0456b5 FF |
3223 | |
3224 | if (!ieee80211_hw_check(&local->hw, TX_AMSDU)) | |
3225 | return false; | |
3226 | ||
344f8e00 SS |
3227 | if (skb_is_gso(skb)) |
3228 | return false; | |
3229 | ||
6e0456b5 FF |
3230 | if (!txq) |
3231 | return false; | |
3232 | ||
3233 | txqi = to_txq_info(txq); | |
3234 | if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags)) | |
3235 | return false; | |
3236 | ||
3237 | if (sta->sta.max_rc_amsdu_len) | |
3238 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3239 | sta->sta.max_rc_amsdu_len); | |
3240 | ||
edba6bda SS |
3241 | if (sta->sta.max_tid_amsdu_len[tid]) |
3242 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3243 | sta->sta.max_tid_amsdu_len[tid]); | |
3244 | ||
fa962b92 | 3245 | spin_lock_bh(&fq->lock); |
6e0456b5 | 3246 | |
fa962b92 MK |
3247 | /* TODO: Ideally aggregation should be done on dequeue to remain |
3248 | * responsive to environment changes. | |
3249 | */ | |
3250 | ||
3251 | tin = &txqi->tin; | |
3252 | flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func); | |
3253 | head = skb_peek_tail(&flow->queue); | |
344f8e00 | 3254 | if (!head || skb_is_gso(head)) |
6e0456b5 FF |
3255 | goto out; |
3256 | ||
fa962b92 MK |
3257 | orig_len = head->len; |
3258 | ||
6e0456b5 FF |
3259 | if (skb->len + head->len > max_amsdu_len) |
3260 | goto out; | |
3261 | ||
6e0456b5 FF |
3262 | nfrags = 1 + skb_shinfo(skb)->nr_frags; |
3263 | nfrags += 1 + skb_shinfo(head)->nr_frags; | |
3264 | frag_tail = &skb_shinfo(head)->frag_list; | |
3265 | while (*frag_tail) { | |
3266 | nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags; | |
3267 | frag_tail = &(*frag_tail)->next; | |
3268 | n++; | |
3269 | } | |
3270 | ||
3271 | if (max_subframes && n > max_subframes) | |
3272 | goto out; | |
3273 | ||
3274 | if (max_frags && nfrags > max_frags) | |
3275 | goto out; | |
9739fe29 SS |
3276 | |
3277 | if (!drv_can_aggregate_in_amsdu(local, head, skb)) | |
3278 | goto out; | |
6e0456b5 | 3279 | |
1eb50790 | 3280 | if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head)) |
6e0456b5 FF |
3281 | goto out; |
3282 | ||
166ac9d5 SS |
3283 | /* |
3284 | * Pad out the previous subframe to a multiple of 4 by adding the | |
3285 | * padding to the next one, that's being added. Note that head->len | |
3286 | * is the length of the full A-MSDU, but that works since each time | |
3287 | * we add a new subframe we pad out the previous one to a multiple | |
3288 | * of 4 and thus it no longer matters in the next round. | |
3289 | */ | |
3290 | hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header); | |
3291 | if ((head->len - hdrlen) & 3) | |
3292 | pad = 4 - ((head->len - hdrlen) & 3); | |
3293 | ||
3294 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + | |
3295 | 2 + pad)) | |
aa58acf3 | 3296 | goto out_recalc; |
6e0456b5 FF |
3297 | |
3298 | ret = true; | |
3299 | data = skb_push(skb, ETH_ALEN + 2); | |
3300 | memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN); | |
3301 | ||
3302 | data += 2 * ETH_ALEN; | |
3303 | len = cpu_to_be16(subframe_len); | |
3304 | memcpy(data, &len, 2); | |
3305 | memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header)); | |
3306 | ||
166ac9d5 SS |
3307 | memset(skb_push(skb, pad), 0, pad); |
3308 | ||
6e0456b5 FF |
3309 | head->len += skb->len; |
3310 | head->data_len += skb->len; | |
3311 | *frag_tail = skb; | |
3312 | ||
aa58acf3 JB |
3313 | out_recalc: |
3314 | if (head->len != orig_len) { | |
3315 | flow->backlog += head->len - orig_len; | |
3316 | tin->backlog_bytes += head->len - orig_len; | |
fa962b92 | 3317 | |
aa58acf3 JB |
3318 | fq_recalc_backlog(fq, tin, flow); |
3319 | } | |
6e0456b5 | 3320 | out: |
fa962b92 | 3321 | spin_unlock_bh(&fq->lock); |
6e0456b5 FF |
3322 | |
3323 | return ret; | |
3324 | } | |
3325 | ||
bb42f2d1 THJ |
3326 | /* |
3327 | * Can be called while the sta lock is held. Anything that can cause packets to | |
3328 | * be generated will cause deadlock! | |
3329 | */ | |
3330 | static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata, | |
3331 | struct sta_info *sta, u8 pn_offs, | |
3332 | struct ieee80211_key *key, | |
3333 | struct sk_buff *skb) | |
3334 | { | |
3335 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3336 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3337 | u8 tid = IEEE80211_NUM_TIDS; | |
3338 | ||
3339 | if (key) | |
3340 | info->control.hw_key = &key->conf; | |
3341 | ||
3342 | ieee80211_tx_stats(skb->dev, skb->len); | |
3343 | ||
3344 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3345 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
bb42f2d1 THJ |
3346 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); |
3347 | } else { | |
3348 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
3349 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); | |
3350 | sdata->sequence_number += 0x10; | |
3351 | } | |
3352 | ||
3353 | if (skb_shinfo(skb)->gso_size) | |
3354 | sta->tx_stats.msdu[tid] += | |
3355 | DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size); | |
3356 | else | |
3357 | sta->tx_stats.msdu[tid]++; | |
3358 | ||
3359 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
3360 | ||
3361 | /* statistics normally done by ieee80211_tx_h_stats (but that | |
3362 | * has to consider fragmentation, so is more complex) | |
3363 | */ | |
3364 | sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; | |
3365 | sta->tx_stats.packets[skb_get_queue_mapping(skb)]++; | |
3366 | ||
3367 | if (pn_offs) { | |
3368 | u64 pn; | |
3369 | u8 *crypto_hdr = skb->data + pn_offs; | |
3370 | ||
3371 | switch (key->conf.cipher) { | |
3372 | case WLAN_CIPHER_SUITE_CCMP: | |
3373 | case WLAN_CIPHER_SUITE_CCMP_256: | |
3374 | case WLAN_CIPHER_SUITE_GCMP: | |
3375 | case WLAN_CIPHER_SUITE_GCMP_256: | |
3376 | pn = atomic64_inc_return(&key->conf.tx_pn); | |
3377 | crypto_hdr[0] = pn; | |
3378 | crypto_hdr[1] = pn >> 8; | |
3379 | crypto_hdr[4] = pn >> 16; | |
3380 | crypto_hdr[5] = pn >> 24; | |
3381 | crypto_hdr[6] = pn >> 32; | |
3382 | crypto_hdr[7] = pn >> 40; | |
3383 | break; | |
3384 | } | |
3385 | } | |
3386 | } | |
3387 | ||
17c18bf8 | 3388 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, |
bb42f2d1 | 3389 | struct sta_info *sta, |
17c18bf8 JB |
3390 | struct ieee80211_fast_tx *fast_tx, |
3391 | struct sk_buff *skb) | |
3392 | { | |
3393 | struct ieee80211_local *local = sdata->local; | |
3394 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; | |
3395 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); | |
3396 | int hw_headroom = sdata->local->hw.extra_tx_headroom; | |
3397 | struct ethhdr eth; | |
35f432a0 | 3398 | struct ieee80211_tx_info *info; |
17c18bf8 JB |
3399 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; |
3400 | struct ieee80211_tx_data tx; | |
3401 | ieee80211_tx_result r; | |
3402 | struct tid_ampdu_tx *tid_tx = NULL; | |
3403 | u8 tid = IEEE80211_NUM_TIDS; | |
3404 | ||
3405 | /* control port protocol needs a lot of special handling */ | |
3406 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) | |
3407 | return false; | |
3408 | ||
3409 | /* only RFC 1042 SNAP */ | |
3410 | if (ethertype < ETH_P_802_3_MIN) | |
3411 | return false; | |
3412 | ||
3413 | /* don't handle TX status request here either */ | |
3414 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) | |
3415 | return false; | |
3416 | ||
3417 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3418 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3419 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
472be00d JB |
3420 | if (tid_tx) { |
3421 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) | |
3422 | return false; | |
3423 | if (tid_tx->timeout) | |
3424 | tid_tx->last_tx = jiffies; | |
3425 | } | |
17c18bf8 JB |
3426 | } |
3427 | ||
3428 | /* after this point (skb is modified) we cannot return false */ | |
3429 | ||
3430 | if (skb_shared(skb)) { | |
3431 | struct sk_buff *tmp_skb = skb; | |
3432 | ||
3433 | skb = skb_clone(skb, GFP_ATOMIC); | |
3434 | kfree_skb(tmp_skb); | |
3435 | ||
3436 | if (!skb) | |
3437 | return true; | |
3438 | } | |
3439 | ||
6e0456b5 FF |
3440 | if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) && |
3441 | ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb)) | |
3442 | return true; | |
3443 | ||
17c18bf8 JB |
3444 | /* will not be crypto-handled beyond what we do here, so use false |
3445 | * as the may-encrypt argument for the resize to not account for | |
3446 | * more room than we already have in 'extra_head' | |
3447 | */ | |
3448 | if (unlikely(ieee80211_skb_resize(sdata, skb, | |
3449 | max_t(int, extra_head + hw_headroom - | |
3450 | skb_headroom(skb), 0), | |
3451 | false))) { | |
3452 | kfree_skb(skb); | |
3453 | return true; | |
3454 | } | |
3455 | ||
3456 | memcpy(ð, skb->data, ETH_HLEN - 2); | |
d58ff351 | 3457 | hdr = skb_push(skb, extra_head); |
17c18bf8 JB |
3458 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); |
3459 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); | |
3460 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); | |
3461 | ||
35f432a0 | 3462 | info = IEEE80211_SKB_CB(skb); |
17c18bf8 JB |
3463 | memset(info, 0, sizeof(*info)); |
3464 | info->band = fast_tx->band; | |
3465 | info->control.vif = &sdata->vif; | |
3466 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | | |
3467 | IEEE80211_TX_CTL_DONTFRAG | | |
3468 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); | |
bb42f2d1 | 3469 | info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT; |
17c18bf8 | 3470 | |
a786f96d FF |
3471 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { |
3472 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3473 | *ieee80211_get_qos_ctl(hdr) = tid; | |
3474 | } | |
3475 | ||
17c18bf8 JB |
3476 | __skb_queue_head_init(&tx.skbs); |
3477 | ||
3478 | tx.flags = IEEE80211_TX_UNICAST; | |
3479 | tx.local = local; | |
3480 | tx.sdata = sdata; | |
3481 | tx.sta = sta; | |
3482 | tx.key = fast_tx->key; | |
3483 | ||
30686bf7 | 3484 | if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) { |
17c18bf8 JB |
3485 | tx.skb = skb; |
3486 | r = ieee80211_tx_h_rate_ctrl(&tx); | |
3487 | skb = tx.skb; | |
3488 | tx.skb = NULL; | |
3489 | ||
3490 | if (r != TX_CONTINUE) { | |
3491 | if (r != TX_QUEUED) | |
3492 | kfree_skb(skb); | |
3493 | return true; | |
3494 | } | |
3495 | } | |
3496 | ||
bb42f2d1 THJ |
3497 | if (ieee80211_queue_skb(local, sdata, sta, skb)) |
3498 | return true; | |
17c18bf8 | 3499 | |
bb42f2d1 THJ |
3500 | ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs, |
3501 | fast_tx->key, skb); | |
17c18bf8 JB |
3502 | |
3503 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3504 | sdata = container_of(sdata->bss, | |
3505 | struct ieee80211_sub_if_data, u.ap); | |
3506 | ||
3507 | __skb_queue_tail(&tx.skbs, skb); | |
3508 | ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false); | |
3509 | return true; | |
3510 | } | |
3511 | ||
e0e2efff THJ |
3512 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, |
3513 | struct ieee80211_txq *txq) | |
3514 | { | |
3515 | struct ieee80211_local *local = hw_to_local(hw); | |
3516 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); | |
3517 | struct ieee80211_hdr *hdr; | |
3518 | struct sk_buff *skb = NULL; | |
3519 | struct fq *fq = &local->fq; | |
3520 | struct fq_tin *tin = &txqi->tin; | |
bb42f2d1 THJ |
3521 | struct ieee80211_tx_info *info; |
3522 | struct ieee80211_tx_data tx; | |
3523 | ieee80211_tx_result r; | |
21a5d4c3 | 3524 | struct ieee80211_vif *vif = txq->vif; |
e0e2efff THJ |
3525 | |
3526 | spin_lock_bh(&fq->lock); | |
3527 | ||
21a5d4c3 MP |
3528 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags) || |
3529 | test_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags)) | |
e0e2efff THJ |
3530 | goto out; |
3531 | ||
21a5d4c3 MP |
3532 | if (vif->txqs_stopped[ieee80211_ac_from_tid(txq->tid)]) { |
3533 | set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags); | |
3534 | goto out; | |
3535 | } | |
3536 | ||
bb42f2d1 THJ |
3537 | /* Make sure fragments stay together. */ |
3538 | skb = __skb_dequeue(&txqi->frags); | |
3539 | if (skb) | |
3540 | goto out; | |
3541 | ||
3542 | begin: | |
e0e2efff THJ |
3543 | skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func); |
3544 | if (!skb) | |
3545 | goto out; | |
3546 | ||
e0e2efff | 3547 | hdr = (struct ieee80211_hdr *)skb->data; |
bb42f2d1 THJ |
3548 | info = IEEE80211_SKB_CB(skb); |
3549 | ||
3550 | memset(&tx, 0, sizeof(tx)); | |
3551 | __skb_queue_head_init(&tx.skbs); | |
3552 | tx.local = local; | |
3553 | tx.skb = skb; | |
3554 | tx.sdata = vif_to_sdata(info->control.vif); | |
3555 | ||
3556 | if (txq->sta) | |
3557 | tx.sta = container_of(txq->sta, struct sta_info, sta); | |
3558 | ||
3559 | /* | |
3560 | * The key can be removed while the packet was queued, so need to call | |
3561 | * this here to get the current key. | |
3562 | */ | |
3563 | r = ieee80211_tx_h_select_key(&tx); | |
3564 | if (r != TX_CONTINUE) { | |
3565 | ieee80211_free_txskb(&local->hw, skb); | |
3566 | goto begin; | |
3567 | } | |
3568 | ||
c1f4c9ed FF |
3569 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) |
3570 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
3571 | else | |
3572 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
3573 | ||
bb42f2d1 | 3574 | if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) { |
e0e2efff THJ |
3575 | struct sta_info *sta = container_of(txq->sta, struct sta_info, |
3576 | sta); | |
bb42f2d1 | 3577 | u8 pn_offs = 0; |
e0e2efff | 3578 | |
bb42f2d1 THJ |
3579 | if (tx.key && |
3580 | (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) | |
3581 | pn_offs = ieee80211_hdrlen(hdr->frame_control); | |
3582 | ||
3583 | ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs, | |
3584 | tx.key, skb); | |
3585 | } else { | |
3586 | if (invoke_tx_handlers_late(&tx)) | |
3587 | goto begin; | |
3588 | ||
3589 | skb = __skb_dequeue(&tx.skbs); | |
3590 | ||
3591 | if (!skb_queue_empty(&tx.skbs)) | |
3592 | skb_queue_splice_tail(&tx.skbs, &txqi->frags); | |
e0e2efff THJ |
3593 | } |
3594 | ||
233e98dc | 3595 | if (skb_has_frag_list(skb) && |
1e1430d5 JB |
3596 | !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) { |
3597 | if (skb_linearize(skb)) { | |
3598 | ieee80211_free_txskb(&local->hw, skb); | |
3599 | goto begin; | |
3600 | } | |
3601 | } | |
3602 | ||
53168215 JB |
3603 | switch (tx.sdata->vif.type) { |
3604 | case NL80211_IFTYPE_MONITOR: | |
3605 | if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { | |
3606 | vif = &tx.sdata->vif; | |
3607 | break; | |
3608 | } | |
3609 | tx.sdata = rcu_dereference(local->monitor_sdata); | |
3610 | if (tx.sdata) { | |
3611 | vif = &tx.sdata->vif; | |
3612 | info->hw_queue = | |
3613 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
3614 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { | |
3615 | ieee80211_free_txskb(&local->hw, skb); | |
3616 | goto begin; | |
3617 | } else { | |
3618 | vif = NULL; | |
3619 | } | |
3620 | break; | |
3621 | case NL80211_IFTYPE_AP_VLAN: | |
3622 | tx.sdata = container_of(tx.sdata->bss, | |
3623 | struct ieee80211_sub_if_data, u.ap); | |
3624 | /* fall through */ | |
3625 | default: | |
3626 | vif = &tx.sdata->vif; | |
3627 | break; | |
3628 | } | |
3629 | ||
3630 | IEEE80211_SKB_CB(skb)->control.vif = vif; | |
21a5d4c3 | 3631 | |
e0e2efff THJ |
3632 | out: |
3633 | spin_unlock_bh(&fq->lock); | |
3634 | ||
e0e2efff THJ |
3635 | return skb; |
3636 | } | |
3637 | EXPORT_SYMBOL(ieee80211_tx_dequeue); | |
3638 | ||
4c9451ed JB |
3639 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
3640 | struct net_device *dev, | |
3641 | u32 info_flags) | |
3642 | { | |
3643 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
97ffe757 | 3644 | struct sta_info *sta; |
80616c0d | 3645 | struct sk_buff *next; |
4c9451ed JB |
3646 | |
3647 | if (unlikely(skb->len < ETH_HLEN)) { | |
3648 | kfree_skb(skb); | |
3649 | return; | |
3650 | } | |
3651 | ||
3652 | rcu_read_lock(); | |
e2ebc74d | 3653 | |
2d981fdd JB |
3654 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
3655 | goto out_free; | |
4c9451ed | 3656 | |
17c18bf8 JB |
3657 | if (!IS_ERR_OR_NULL(sta)) { |
3658 | struct ieee80211_fast_tx *fast_tx; | |
3659 | ||
70e53669 | 3660 | sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift); |
36148c2b | 3661 | |
17c18bf8 JB |
3662 | fast_tx = rcu_dereference(sta->fast_tx); |
3663 | ||
3664 | if (fast_tx && | |
bb42f2d1 | 3665 | ieee80211_xmit_fast(sdata, sta, fast_tx, skb)) |
17c18bf8 JB |
3666 | goto out; |
3667 | } | |
3668 | ||
80616c0d JB |
3669 | if (skb_is_gso(skb)) { |
3670 | struct sk_buff *segs; | |
680a0dab | 3671 | |
80616c0d JB |
3672 | segs = skb_gso_segment(skb, 0); |
3673 | if (IS_ERR(segs)) { | |
2d981fdd | 3674 | goto out_free; |
80616c0d JB |
3675 | } else if (segs) { |
3676 | consume_skb(skb); | |
3677 | skb = segs; | |
3678 | } | |
3679 | } else { | |
3680 | /* we cannot process non-linear frames on this path */ | |
3681 | if (skb_linearize(skb)) { | |
3682 | kfree_skb(skb); | |
3683 | goto out; | |
3684 | } | |
3685 | ||
3686 | /* the frame could be fragmented, software-encrypted, and other | |
3687 | * things so we cannot really handle checksum offload with it - | |
3688 | * fix it up in software before we handle anything else. | |
3689 | */ | |
3690 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
f603f1f3 JB |
3691 | skb_set_transport_header(skb, |
3692 | skb_checksum_start_offset(skb)); | |
80616c0d JB |
3693 | if (skb_checksum_help(skb)) |
3694 | goto out_free; | |
3695 | } | |
2d981fdd JB |
3696 | } |
3697 | ||
80616c0d JB |
3698 | next = skb; |
3699 | while (next) { | |
3700 | skb = next; | |
3701 | next = skb->next; | |
4c9451ed | 3702 | |
80616c0d JB |
3703 | skb->prev = NULL; |
3704 | skb->next = NULL; | |
3705 | ||
3706 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
3707 | if (IS_ERR(skb)) | |
3708 | goto out; | |
e2ebc74d | 3709 | |
5a490510 | 3710 | ieee80211_tx_stats(dev, skb->len); |
80616c0d | 3711 | |
b9771d41 | 3712 | ieee80211_xmit(sdata, sta, skb, 0); |
80616c0d | 3713 | } |
2d981fdd JB |
3714 | goto out; |
3715 | out_free: | |
3716 | kfree_skb(skb); | |
4c9451ed | 3717 | out: |
55de908a | 3718 | rcu_read_unlock(); |
e2ebc74d JB |
3719 | } |
3720 | ||
ebceec86 MB |
3721 | static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta) |
3722 | { | |
3723 | struct ethhdr *eth; | |
3724 | int err; | |
3725 | ||
3726 | err = skb_ensure_writable(skb, ETH_HLEN); | |
3727 | if (unlikely(err)) | |
3728 | return err; | |
3729 | ||
3730 | eth = (void *)skb->data; | |
3731 | ether_addr_copy(eth->h_dest, sta->sta.addr); | |
3732 | ||
3733 | return 0; | |
3734 | } | |
3735 | ||
3736 | static bool ieee80211_multicast_to_unicast(struct sk_buff *skb, | |
3737 | struct net_device *dev) | |
3738 | { | |
3739 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3740 | const struct ethhdr *eth = (void *)skb->data; | |
3741 | const struct vlan_ethhdr *ethvlan = (void *)skb->data; | |
3742 | __be16 ethertype; | |
3743 | ||
3744 | if (likely(!is_multicast_ether_addr(eth->h_dest))) | |
3745 | return false; | |
3746 | ||
3747 | switch (sdata->vif.type) { | |
3748 | case NL80211_IFTYPE_AP_VLAN: | |
3749 | if (sdata->u.vlan.sta) | |
3750 | return false; | |
3751 | if (sdata->wdev.use_4addr) | |
3752 | return false; | |
3753 | /* fall through */ | |
3754 | case NL80211_IFTYPE_AP: | |
3755 | /* check runtime toggle for this bss */ | |
3756 | if (!sdata->bss->multicast_to_unicast) | |
3757 | return false; | |
3758 | break; | |
3759 | default: | |
3760 | return false; | |
3761 | } | |
3762 | ||
3763 | /* multicast to unicast conversion only for some payload */ | |
3764 | ethertype = eth->h_proto; | |
3765 | if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN) | |
3766 | ethertype = ethvlan->h_vlan_encapsulated_proto; | |
3767 | switch (ethertype) { | |
3768 | case htons(ETH_P_ARP): | |
3769 | case htons(ETH_P_IP): | |
3770 | case htons(ETH_P_IPV6): | |
3771 | break; | |
3772 | default: | |
3773 | return false; | |
3774 | } | |
3775 | ||
3776 | return true; | |
3777 | } | |
3778 | ||
3779 | static void | |
3780 | ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev, | |
3781 | struct sk_buff_head *queue) | |
3782 | { | |
3783 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3784 | struct ieee80211_local *local = sdata->local; | |
3785 | const struct ethhdr *eth = (struct ethhdr *)skb->data; | |
3786 | struct sta_info *sta, *first = NULL; | |
3787 | struct sk_buff *cloned_skb; | |
3788 | ||
3789 | rcu_read_lock(); | |
3790 | ||
3791 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3792 | if (sdata != sta->sdata) | |
3793 | /* AP-VLAN mismatch */ | |
3794 | continue; | |
3795 | if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr))) | |
3796 | /* do not send back to source */ | |
3797 | continue; | |
3798 | if (!first) { | |
3799 | first = sta; | |
3800 | continue; | |
3801 | } | |
3802 | cloned_skb = skb_clone(skb, GFP_ATOMIC); | |
3803 | if (!cloned_skb) | |
3804 | goto multicast; | |
3805 | if (unlikely(ieee80211_change_da(cloned_skb, sta))) { | |
3806 | dev_kfree_skb(cloned_skb); | |
3807 | goto multicast; | |
3808 | } | |
3809 | __skb_queue_tail(queue, cloned_skb); | |
3810 | } | |
3811 | ||
3812 | if (likely(first)) { | |
3813 | if (unlikely(ieee80211_change_da(skb, first))) | |
3814 | goto multicast; | |
3815 | __skb_queue_tail(queue, skb); | |
3816 | } else { | |
3817 | /* no STA connected, drop */ | |
3818 | kfree_skb(skb); | |
3819 | skb = NULL; | |
3820 | } | |
3821 | ||
3822 | goto out; | |
3823 | multicast: | |
3824 | __skb_queue_purge(queue); | |
3825 | __skb_queue_tail(queue, skb); | |
3826 | out: | |
3827 | rcu_read_unlock(); | |
3828 | } | |
3829 | ||
4c9451ed JB |
3830 | /** |
3831 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
3832 | * @skb: packet to be sent | |
3833 | * @dev: incoming interface | |
3834 | * | |
3835 | * On failure skb will be freed. | |
3836 | */ | |
24d342c5 LK |
3837 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
3838 | struct net_device *dev) | |
3839 | { | |
ebceec86 MB |
3840 | if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) { |
3841 | struct sk_buff_head queue; | |
3842 | ||
3843 | __skb_queue_head_init(&queue); | |
3844 | ieee80211_convert_to_unicast(skb, dev, &queue); | |
3845 | while ((skb = __skb_dequeue(&queue))) | |
3846 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
3847 | } else { | |
3848 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
3849 | } | |
3850 | ||
24d342c5 LK |
3851 | return NETDEV_TX_OK; |
3852 | } | |
e2ebc74d | 3853 | |
7528ec57 JB |
3854 | struct sk_buff * |
3855 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
3856 | struct sk_buff *skb, u32 info_flags) | |
3857 | { | |
3858 | struct ieee80211_hdr *hdr; | |
3859 | struct ieee80211_tx_data tx = { | |
3860 | .local = sdata->local, | |
3861 | .sdata = sdata, | |
3862 | }; | |
97ffe757 | 3863 | struct sta_info *sta; |
7528ec57 JB |
3864 | |
3865 | rcu_read_lock(); | |
3866 | ||
97ffe757 JB |
3867 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
3868 | kfree_skb(skb); | |
3869 | skb = ERR_PTR(-EINVAL); | |
3870 | goto out; | |
3871 | } | |
3872 | ||
3873 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
7528ec57 JB |
3874 | if (IS_ERR(skb)) |
3875 | goto out; | |
3876 | ||
3877 | hdr = (void *)skb->data; | |
3878 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
3879 | tx.skb = skb; | |
3880 | ||
3881 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
3882 | rcu_read_unlock(); | |
3883 | kfree_skb(skb); | |
3884 | return ERR_PTR(-EINVAL); | |
3885 | } | |
3886 | ||
3887 | out: | |
3888 | rcu_read_unlock(); | |
3889 | return skb; | |
3890 | } | |
3891 | ||
e2530083 JB |
3892 | /* |
3893 | * ieee80211_clear_tx_pending may not be called in a context where | |
3894 | * it is possible that it packets could come in again. | |
3895 | */ | |
e2ebc74d JB |
3896 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
3897 | { | |
1f98ab7f | 3898 | struct sk_buff *skb; |
2de8e0d9 | 3899 | int i; |
e2ebc74d | 3900 | |
1f98ab7f FF |
3901 | for (i = 0; i < local->hw.queues; i++) { |
3902 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
3903 | ieee80211_free_txskb(&local->hw, skb); | |
3904 | } | |
e2ebc74d JB |
3905 | } |
3906 | ||
7bb45683 JB |
3907 | /* |
3908 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
3909 | * which in this case means re-queued -- take as an indication to stop sending | |
3910 | * more pending frames. | |
3911 | */ | |
cd8ffc80 JB |
3912 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
3913 | struct sk_buff *skb) | |
3914 | { | |
3915 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3916 | struct ieee80211_sub_if_data *sdata; | |
3917 | struct sta_info *sta; | |
3918 | struct ieee80211_hdr *hdr; | |
7bb45683 | 3919 | bool result; |
55de908a | 3920 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 3921 | |
5061b0c2 | 3922 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
3923 | |
3924 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
3925 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
3926 | if (unlikely(!chanctx_conf)) { | |
3927 | dev_kfree_skb(skb); | |
3928 | return true; | |
3929 | } | |
73c4e195 | 3930 | info->band = chanctx_conf->def.chan->band; |
b9771d41 | 3931 | result = ieee80211_tx(sdata, NULL, skb, true, 0); |
cd8ffc80 | 3932 | } else { |
252b86c4 JB |
3933 | struct sk_buff_head skbs; |
3934 | ||
3935 | __skb_queue_head_init(&skbs); | |
3936 | __skb_queue_tail(&skbs, skb); | |
3937 | ||
cd8ffc80 | 3938 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 3939 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 3940 | |
74e4dbfd | 3941 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
3942 | } |
3943 | ||
cd8ffc80 JB |
3944 | return result; |
3945 | } | |
3946 | ||
e2530083 | 3947 | /* |
3b8d81e0 | 3948 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 3949 | */ |
e2ebc74d JB |
3950 | void ieee80211_tx_pending(unsigned long data) |
3951 | { | |
3952 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 3953 | unsigned long flags; |
cd8ffc80 | 3954 | int i; |
3b8d81e0 | 3955 | bool txok; |
e2ebc74d | 3956 | |
f0e72851 | 3957 | rcu_read_lock(); |
e2530083 | 3958 | |
3b8d81e0 | 3959 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
3960 | for (i = 0; i < local->hw.queues; i++) { |
3961 | /* | |
3962 | * If queue is stopped by something other than due to pending | |
3963 | * frames, or we have no pending frames, proceed to next queue. | |
3964 | */ | |
3b8d81e0 | 3965 | if (local->queue_stop_reasons[i] || |
2a577d98 | 3966 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 3967 | continue; |
e2530083 | 3968 | |
2a577d98 | 3969 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 3970 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 3971 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 3972 | |
a7bc376c | 3973 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 3974 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
3975 | continue; |
3976 | } | |
3977 | ||
3b8d81e0 JB |
3978 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
3979 | flags); | |
3980 | ||
3981 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
3982 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
3983 | flags); | |
3984 | if (!txok) | |
2a577d98 | 3985 | break; |
e2ebc74d | 3986 | } |
7236fe29 JB |
3987 | |
3988 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 3989 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 3990 | } |
3b8d81e0 | 3991 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 3992 | |
f0e72851 | 3993 | rcu_read_unlock(); |
e2ebc74d JB |
3994 | } |
3995 | ||
3996 | /* functions for drivers to get certain frames */ | |
3997 | ||
eac70c13 | 3998 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3999 | struct ps_data *ps, struct sk_buff *skb, |
4000 | bool is_template) | |
e2ebc74d JB |
4001 | { |
4002 | u8 *pos, *tim; | |
4003 | int aid0 = 0; | |
4004 | int i, have_bits = 0, n1, n2; | |
4005 | ||
4006 | /* Generate bitmap for TIM only if there are any STAs in power save | |
4007 | * mode. */ | |
d012a605 | 4008 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
4009 | /* in the hope that this is faster than |
4010 | * checking byte-for-byte */ | |
f359d3fe | 4011 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 4012 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
4013 | if (!is_template) { |
4014 | if (ps->dtim_count == 0) | |
4015 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
4016 | else | |
4017 | ps->dtim_count--; | |
4018 | } | |
e2ebc74d | 4019 | |
4df864c1 | 4020 | tim = pos = skb_put(skb, 6); |
e2ebc74d JB |
4021 | *pos++ = WLAN_EID_TIM; |
4022 | *pos++ = 4; | |
d012a605 | 4023 | *pos++ = ps->dtim_count; |
8860020e | 4024 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 4025 | |
d012a605 | 4026 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
4027 | aid0 = 1; |
4028 | ||
d012a605 | 4029 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 4030 | |
e2ebc74d JB |
4031 | if (have_bits) { |
4032 | /* Find largest even number N1 so that bits numbered 1 through | |
4033 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
4034 | * (N2 + 1) x 8 through 2007 are 0. */ | |
4035 | n1 = 0; | |
4036 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 4037 | if (ps->tim[i]) { |
e2ebc74d JB |
4038 | n1 = i & 0xfe; |
4039 | break; | |
4040 | } | |
4041 | } | |
4042 | n2 = n1; | |
4043 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 4044 | if (ps->tim[i]) { |
e2ebc74d JB |
4045 | n2 = i; |
4046 | break; | |
4047 | } | |
4048 | } | |
4049 | ||
4050 | /* Bitmap control */ | |
4051 | *pos++ = n1 | aid0; | |
4052 | /* Part Virt Bitmap */ | |
5220da39 | 4053 | skb_put(skb, n2 - n1); |
d012a605 | 4054 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
4055 | |
4056 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
4057 | } else { |
4058 | *pos++ = aid0; /* Bitmap control */ | |
4059 | *pos++ = 0; /* Part Virt Bitmap */ | |
4060 | } | |
e2ebc74d JB |
4061 | } |
4062 | ||
eac70c13 | 4063 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
4064 | struct ps_data *ps, struct sk_buff *skb, |
4065 | bool is_template) | |
eac70c13 MP |
4066 | { |
4067 | struct ieee80211_local *local = sdata->local; | |
4068 | ||
4069 | /* | |
4070 | * Not very nice, but we want to allow the driver to call | |
4071 | * ieee80211_beacon_get() as a response to the set_tim() | |
4072 | * callback. That, however, is already invoked under the | |
4073 | * sta_lock to guarantee consistent and race-free update | |
4074 | * of the tim bitmap in mac80211 and the driver. | |
4075 | */ | |
4076 | if (local->tim_in_locked_section) { | |
6ec8c332 | 4077 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 4078 | } else { |
1b91731d | 4079 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 4080 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 4081 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
4082 | } |
4083 | ||
4084 | return 0; | |
4085 | } | |
4086 | ||
1af586c9 AO |
4087 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
4088 | struct beacon_data *beacon) | |
73da7d5b SW |
4089 | { |
4090 | struct probe_resp *resp; | |
cd7760e6 SW |
4091 | u8 *beacon_data; |
4092 | size_t beacon_data_len; | |
0d06d9ba | 4093 | int i; |
af296bdb | 4094 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
4095 | |
4096 | switch (sdata->vif.type) { | |
4097 | case NL80211_IFTYPE_AP: | |
4098 | beacon_data = beacon->tail; | |
4099 | beacon_data_len = beacon->tail_len; | |
4100 | break; | |
4101 | case NL80211_IFTYPE_ADHOC: | |
4102 | beacon_data = beacon->head; | |
4103 | beacon_data_len = beacon->head_len; | |
4104 | break; | |
b8456a14 CYY |
4105 | case NL80211_IFTYPE_MESH_POINT: |
4106 | beacon_data = beacon->head; | |
4107 | beacon_data_len = beacon->head_len; | |
4108 | break; | |
cd7760e6 SW |
4109 | default: |
4110 | return; | |
4111 | } | |
73da7d5b | 4112 | |
af296bdb | 4113 | rcu_read_lock(); |
0d06d9ba | 4114 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 4115 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 4116 | |
af296bdb MK |
4117 | if (beacon->csa_counter_offsets[i]) { |
4118 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
4119 | beacon_data_len)) { | |
0d06d9ba AO |
4120 | rcu_read_unlock(); |
4121 | return; | |
4122 | } | |
af296bdb MK |
4123 | |
4124 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 4125 | } |
af296bdb MK |
4126 | |
4127 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
4128 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 4129 | } |
af296bdb | 4130 | rcu_read_unlock(); |
1af586c9 AO |
4131 | } |
4132 | ||
e996ec2a WD |
4133 | static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon) |
4134 | { | |
4135 | beacon->csa_current_counter--; | |
4136 | ||
4137 | /* the counter should never reach 0 */ | |
4138 | WARN_ON_ONCE(!beacon->csa_current_counter); | |
4139 | ||
4140 | return beacon->csa_current_counter; | |
4141 | } | |
4142 | ||
1af586c9 AO |
4143 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) |
4144 | { | |
4145 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
4146 | struct beacon_data *beacon = NULL; |
4147 | u8 count = 0; | |
0d06d9ba | 4148 | |
af296bdb MK |
4149 | rcu_read_lock(); |
4150 | ||
4151 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4152 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4153 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4154 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4155 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4156 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4157 | ||
4158 | if (!beacon) | |
4159 | goto unlock; | |
4160 | ||
e996ec2a | 4161 | count = __ieee80211_csa_update_counter(beacon); |
1af586c9 | 4162 | |
af296bdb MK |
4163 | unlock: |
4164 | rcu_read_unlock(); | |
4165 | return count; | |
73da7d5b | 4166 | } |
1af586c9 | 4167 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b | 4168 | |
03737001 GG |
4169 | void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter) |
4170 | { | |
4171 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4172 | struct beacon_data *beacon = NULL; | |
4173 | ||
4174 | rcu_read_lock(); | |
4175 | ||
4176 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4177 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4178 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4179 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4180 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4181 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4182 | ||
4183 | if (!beacon) | |
4184 | goto unlock; | |
4185 | ||
4186 | if (counter < beacon->csa_current_counter) | |
4187 | beacon->csa_current_counter = counter; | |
4188 | ||
4189 | unlock: | |
4190 | rcu_read_unlock(); | |
4191 | } | |
4192 | EXPORT_SYMBOL(ieee80211_csa_set_counter); | |
4193 | ||
73da7d5b SW |
4194 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) |
4195 | { | |
4196 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4197 | struct beacon_data *beacon = NULL; | |
4198 | u8 *beacon_data; | |
4199 | size_t beacon_data_len; | |
73da7d5b SW |
4200 | int ret = false; |
4201 | ||
4202 | if (!ieee80211_sdata_running(sdata)) | |
4203 | return false; | |
4204 | ||
4205 | rcu_read_lock(); | |
4206 | if (vif->type == NL80211_IFTYPE_AP) { | |
4207 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
4208 | ||
4209 | beacon = rcu_dereference(ap->beacon); | |
4210 | if (WARN_ON(!beacon || !beacon->tail)) | |
4211 | goto out; | |
4212 | beacon_data = beacon->tail; | |
4213 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
4214 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
4215 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
4216 | ||
4217 | beacon = rcu_dereference(ifibss->presp); | |
4218 | if (!beacon) | |
4219 | goto out; | |
4220 | ||
b8456a14 CYY |
4221 | beacon_data = beacon->head; |
4222 | beacon_data_len = beacon->head_len; | |
4223 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
4224 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
4225 | ||
4226 | beacon = rcu_dereference(ifmsh->beacon); | |
4227 | if (!beacon) | |
4228 | goto out; | |
4229 | ||
cd7760e6 SW |
4230 | beacon_data = beacon->head; |
4231 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
4232 | } else { |
4233 | WARN_ON(1); | |
4234 | goto out; | |
4235 | } | |
4236 | ||
10d78f27 MK |
4237 | if (!beacon->csa_counter_offsets[0]) |
4238 | goto out; | |
4239 | ||
af296bdb | 4240 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
4241 | goto out; |
4242 | ||
af296bdb | 4243 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
4244 | ret = true; |
4245 | out: | |
4246 | rcu_read_unlock(); | |
4247 | ||
4248 | return ret; | |
4249 | } | |
4250 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
4251 | ||
6ec8c332 AO |
4252 | static struct sk_buff * |
4253 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
4254 | struct ieee80211_vif *vif, | |
4255 | struct ieee80211_mutable_offsets *offs, | |
4256 | bool is_template) | |
e2ebc74d JB |
4257 | { |
4258 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 4259 | struct beacon_data *beacon = NULL; |
9d139c81 | 4260 | struct sk_buff *skb = NULL; |
e039fa4a | 4261 | struct ieee80211_tx_info *info; |
e2ebc74d | 4262 | struct ieee80211_sub_if_data *sdata = NULL; |
57fbcce3 | 4263 | enum nl80211_band band; |
e00cfce0 | 4264 | struct ieee80211_tx_rate_control txrc; |
55de908a | 4265 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 4266 | int csa_off_base = 0; |
8318d78a | 4267 | |
5dfdaf58 | 4268 | rcu_read_lock(); |
e2ebc74d | 4269 | |
32bfd35d | 4270 | sdata = vif_to_sdata(vif); |
55de908a | 4271 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 4272 | |
55de908a | 4273 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
4274 | goto out; |
4275 | ||
6ec8c332 AO |
4276 | if (offs) |
4277 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 4278 | |
05c914fe | 4279 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 4280 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 4281 | |
af296bdb | 4282 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 4283 | if (beacon) { |
10d78f27 | 4284 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 | 4285 | if (!is_template) |
e996ec2a | 4286 | __ieee80211_csa_update_counter(beacon); |
1af586c9 AO |
4287 | |
4288 | ieee80211_set_csa(sdata, beacon); | |
4289 | } | |
73da7d5b | 4290 | |
902acc78 JB |
4291 | /* |
4292 | * headroom, head length, | |
4293 | * tail length and maximum TIM length | |
4294 | */ | |
4295 | skb = dev_alloc_skb(local->tx_headroom + | |
4296 | beacon->head_len + | |
70dabeb7 FF |
4297 | beacon->tail_len + 256 + |
4298 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
4299 | if (!skb) |
4300 | goto out; | |
33b64eb2 | 4301 | |
902acc78 | 4302 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 4303 | skb_put_data(skb, beacon->head, beacon->head_len); |
33b64eb2 | 4304 | |
6ec8c332 AO |
4305 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
4306 | is_template); | |
33b64eb2 | 4307 | |
6ec8c332 AO |
4308 | if (offs) { |
4309 | offs->tim_offset = beacon->head_len; | |
4310 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
4311 | |
4312 | /* for AP the csa offsets are from tail */ | |
4313 | csa_off_base = skb->len; | |
6ec8c332 | 4314 | } |
eddcbb94 | 4315 | |
902acc78 | 4316 | if (beacon->tail) |
59ae1d12 JB |
4317 | skb_put_data(skb, beacon->tail, |
4318 | beacon->tail_len); | |
9d139c81 JB |
4319 | } else |
4320 | goto out; | |
05c914fe | 4321 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 4322 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 4323 | struct ieee80211_hdr *hdr; |
33b64eb2 | 4324 | |
af296bdb MK |
4325 | beacon = rcu_dereference(ifibss->presp); |
4326 | if (!beacon) | |
9d139c81 JB |
4327 | goto out; |
4328 | ||
10d78f27 | 4329 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 | 4330 | if (!is_template) |
e996ec2a | 4331 | __ieee80211_csa_update_counter(beacon); |
cd7760e6 | 4332 | |
af296bdb | 4333 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 4334 | } |
cd7760e6 | 4335 | |
af296bdb | 4336 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 4337 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
4338 | if (!skb) |
4339 | goto out; | |
c3ffeab4 | 4340 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 4341 | skb_put_data(skb, beacon->head, beacon->head_len); |
9d139c81 JB |
4342 | |
4343 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
4344 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
4345 | IEEE80211_STYPE_BEACON); | |
902acc78 | 4346 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 4347 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 4348 | |
af296bdb MK |
4349 | beacon = rcu_dereference(ifmsh->beacon); |
4350 | if (!beacon) | |
ac1bd846 | 4351 | goto out; |
ac1bd846 | 4352 | |
10d78f27 | 4353 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
4354 | if (!is_template) |
4355 | /* TODO: For mesh csa_counter is in TU, so | |
4356 | * decrementing it by one isn't correct, but | |
4357 | * for now we leave it consistent with overall | |
4358 | * mac80211's behavior. | |
4359 | */ | |
e996ec2a | 4360 | __ieee80211_csa_update_counter(beacon); |
1af586c9 | 4361 | |
af296bdb | 4362 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 4363 | } |
b8456a14 | 4364 | |
dbf498fb | 4365 | if (ifmsh->sync_ops) |
445cd452 | 4366 | ifmsh->sync_ops->adjust_tsf(sdata, beacon); |
dbf498fb | 4367 | |
3b69a9c5 | 4368 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 4369 | beacon->head_len + |
3f52b7e3 | 4370 | 256 + /* TIM IE */ |
af296bdb | 4371 | beacon->tail_len + |
70dabeb7 | 4372 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
4373 | if (!skb) |
4374 | goto out; | |
2b5e1967 | 4375 | skb_reserve(skb, local->tx_headroom); |
59ae1d12 | 4376 | skb_put_data(skb, beacon->head, beacon->head_len); |
6ec8c332 AO |
4377 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
4378 | ||
4379 | if (offs) { | |
af296bdb MK |
4380 | offs->tim_offset = beacon->head_len; |
4381 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
4382 | } |
4383 | ||
59ae1d12 | 4384 | skb_put_data(skb, beacon->tail, beacon->tail_len); |
9d139c81 JB |
4385 | } else { |
4386 | WARN_ON(1); | |
5dfdaf58 | 4387 | goto out; |
e2ebc74d JB |
4388 | } |
4389 | ||
1af586c9 | 4390 | /* CSA offsets */ |
af296bdb | 4391 | if (offs && beacon) { |
1af586c9 AO |
4392 | int i; |
4393 | ||
4394 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 4395 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
4396 | |
4397 | if (!csa_off) | |
4398 | continue; | |
4399 | ||
4400 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
4401 | } | |
4402 | } | |
4403 | ||
4bf88530 | 4404 | band = chanctx_conf->def.chan->band; |
55de908a | 4405 | |
e039fa4a JB |
4406 | info = IEEE80211_SKB_CB(skb); |
4407 | ||
3b8d81e0 | 4408 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 4409 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 4410 | info->band = band; |
e00cfce0 JM |
4411 | |
4412 | memset(&txrc, 0, sizeof(txrc)); | |
4413 | txrc.hw = hw; | |
e31583cd | 4414 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
4415 | txrc.bss_conf = &sdata->vif.bss_conf; |
4416 | txrc.skb = skb; | |
4417 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 4418 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
8f0729b1 | 4419 | txrc.bss = true; |
e00cfce0 | 4420 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
4421 | |
4422 | info->control.vif = vif; | |
f591fa5d | 4423 | |
a472e71b JL |
4424 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
4425 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
4426 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 4427 | out: |
5dfdaf58 | 4428 | rcu_read_unlock(); |
e2ebc74d | 4429 | return skb; |
6ec8c332 AO |
4430 | |
4431 | } | |
4432 | ||
4433 | struct sk_buff * | |
4434 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
4435 | struct ieee80211_vif *vif, | |
4436 | struct ieee80211_mutable_offsets *offs) | |
4437 | { | |
4438 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
4439 | } | |
4440 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
4441 | ||
4442 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
4443 | struct ieee80211_vif *vif, | |
4444 | u16 *tim_offset, u16 *tim_length) | |
4445 | { | |
4446 | struct ieee80211_mutable_offsets offs = {}; | |
4447 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
35afa588 HS |
4448 | struct sk_buff *copy; |
4449 | struct ieee80211_supported_band *sband; | |
4450 | int shift; | |
4451 | ||
4452 | if (!bcn) | |
4453 | return bcn; | |
6ec8c332 AO |
4454 | |
4455 | if (tim_offset) | |
4456 | *tim_offset = offs.tim_offset; | |
4457 | ||
4458 | if (tim_length) | |
4459 | *tim_length = offs.tim_length; | |
4460 | ||
35afa588 HS |
4461 | if (ieee80211_hw_check(hw, BEACON_TX_STATUS) || |
4462 | !hw_to_local(hw)->monitors) | |
4463 | return bcn; | |
4464 | ||
4465 | /* send a copy to monitor interfaces */ | |
4466 | copy = skb_copy(bcn, GFP_ATOMIC); | |
4467 | if (!copy) | |
4468 | return bcn; | |
4469 | ||
4470 | shift = ieee80211_vif_get_shift(vif); | |
21a8e9dd MSS |
4471 | sband = ieee80211_get_sband(vif_to_sdata(vif)); |
4472 | if (!sband) | |
4473 | return bcn; | |
4474 | ||
35afa588 HS |
4475 | ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false); |
4476 | ||
6ec8c332 | 4477 | return bcn; |
e2ebc74d | 4478 | } |
eddcbb94 | 4479 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 4480 | |
02945821 AN |
4481 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
4482 | struct ieee80211_vif *vif) | |
4483 | { | |
4484 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
4485 | struct sk_buff *skb = NULL; |
4486 | struct probe_resp *presp = NULL; | |
02945821 AN |
4487 | struct ieee80211_hdr *hdr; |
4488 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4489 | ||
4490 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
4491 | return NULL; | |
4492 | ||
4493 | rcu_read_lock(); | |
4494 | ||
4495 | ap = &sdata->u.ap; | |
4496 | presp = rcu_dereference(ap->probe_resp); | |
4497 | if (!presp) | |
4498 | goto out; | |
4499 | ||
aa7a0080 | 4500 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
4501 | if (!skb) |
4502 | goto out; | |
4503 | ||
59ae1d12 | 4504 | skb_put_data(skb, presp->data, presp->len); |
aa7a0080 | 4505 | |
02945821 AN |
4506 | hdr = (struct ieee80211_hdr *) skb->data; |
4507 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
4508 | ||
4509 | out: | |
4510 | rcu_read_unlock(); | |
4511 | return skb; | |
4512 | } | |
4513 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
4514 | ||
7044cc56 KV |
4515 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
4516 | struct ieee80211_vif *vif) | |
4517 | { | |
4518 | struct ieee80211_sub_if_data *sdata; | |
4519 | struct ieee80211_if_managed *ifmgd; | |
4520 | struct ieee80211_pspoll *pspoll; | |
4521 | struct ieee80211_local *local; | |
4522 | struct sk_buff *skb; | |
4523 | ||
4524 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
4525 | return NULL; | |
4526 | ||
4527 | sdata = vif_to_sdata(vif); | |
4528 | ifmgd = &sdata->u.mgd; | |
4529 | local = sdata->local; | |
4530 | ||
4531 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 4532 | if (!skb) |
7044cc56 | 4533 | return NULL; |
d15b8459 | 4534 | |
7044cc56 KV |
4535 | skb_reserve(skb, local->hw.extra_tx_headroom); |
4536 | ||
b080db58 | 4537 | pspoll = skb_put_zero(skb, sizeof(*pspoll)); |
7044cc56 KV |
4538 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | |
4539 | IEEE80211_STYPE_PSPOLL); | |
4540 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
4541 | ||
4542 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
4543 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
4544 | ||
4545 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
4546 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
4547 | ||
4548 | return skb; | |
4549 | } | |
4550 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
4551 | ||
4552 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
7b6ddeaf JB |
4553 | struct ieee80211_vif *vif, |
4554 | bool qos_ok) | |
7044cc56 KV |
4555 | { |
4556 | struct ieee80211_hdr_3addr *nullfunc; | |
4557 | struct ieee80211_sub_if_data *sdata; | |
4558 | struct ieee80211_if_managed *ifmgd; | |
4559 | struct ieee80211_local *local; | |
4560 | struct sk_buff *skb; | |
7b6ddeaf | 4561 | bool qos = false; |
7044cc56 KV |
4562 | |
4563 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
4564 | return NULL; | |
4565 | ||
4566 | sdata = vif_to_sdata(vif); | |
4567 | ifmgd = &sdata->u.mgd; | |
4568 | local = sdata->local; | |
4569 | ||
7b6ddeaf JB |
4570 | if (qos_ok) { |
4571 | struct sta_info *sta; | |
4572 | ||
4573 | rcu_read_lock(); | |
4574 | sta = sta_info_get(sdata, ifmgd->bssid); | |
4575 | qos = sta && sta->sta.wme; | |
4576 | rcu_read_unlock(); | |
4577 | } | |
4578 | ||
4579 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
4580 | sizeof(*nullfunc) + 2); | |
d15b8459 | 4581 | if (!skb) |
7044cc56 | 4582 | return NULL; |
d15b8459 | 4583 | |
7044cc56 KV |
4584 | skb_reserve(skb, local->hw.extra_tx_headroom); |
4585 | ||
b080db58 | 4586 | nullfunc = skb_put_zero(skb, sizeof(*nullfunc)); |
7044cc56 KV |
4587 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | |
4588 | IEEE80211_STYPE_NULLFUNC | | |
4589 | IEEE80211_FCTL_TODS); | |
7b6ddeaf | 4590 | if (qos) { |
e0ba7095 | 4591 | __le16 qoshdr = cpu_to_le16(7); |
7b6ddeaf JB |
4592 | |
4593 | BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC | | |
4594 | IEEE80211_STYPE_NULLFUNC) != | |
4595 | IEEE80211_STYPE_QOS_NULLFUNC); | |
4596 | nullfunc->frame_control |= | |
4597 | cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC); | |
4598 | skb->priority = 7; | |
4599 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
e0ba7095 | 4600 | skb_put_data(skb, &qoshdr, sizeof(qoshdr)); |
7b6ddeaf JB |
4601 | } |
4602 | ||
7044cc56 KV |
4603 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); |
4604 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
4605 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
4606 | ||
4607 | return skb; | |
4608 | } | |
4609 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
4610 | ||
05e54ea6 | 4611 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 4612 | const u8 *src_addr, |
05e54ea6 | 4613 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 4614 | size_t tailroom) |
05e54ea6 | 4615 | { |
a344d677 | 4616 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
4617 | struct ieee80211_hdr_3addr *hdr; |
4618 | struct sk_buff *skb; | |
4619 | size_t ie_ssid_len; | |
4620 | u8 *pos; | |
4621 | ||
05e54ea6 KV |
4622 | ie_ssid_len = 2 + ssid_len; |
4623 | ||
4624 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 4625 | ie_ssid_len + tailroom); |
d15b8459 | 4626 | if (!skb) |
05e54ea6 | 4627 | return NULL; |
05e54ea6 KV |
4628 | |
4629 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
4630 | ||
b080db58 | 4631 | hdr = skb_put_zero(skb, sizeof(*hdr)); |
05e54ea6 KV |
4632 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
4633 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 4634 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 4635 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 4636 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
4637 | |
4638 | pos = skb_put(skb, ie_ssid_len); | |
4639 | *pos++ = WLAN_EID_SSID; | |
4640 | *pos++ = ssid_len; | |
88c868c4 | 4641 | if (ssid_len) |
05e54ea6 KV |
4642 | memcpy(pos, ssid, ssid_len); |
4643 | pos += ssid_len; | |
4644 | ||
05e54ea6 KV |
4645 | return skb; |
4646 | } | |
4647 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
4648 | ||
32bfd35d | 4649 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 4650 | const void *frame, size_t frame_len, |
e039fa4a | 4651 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
4652 | struct ieee80211_rts *rts) |
4653 | { | |
4654 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 4655 | |
065e9605 HH |
4656 | rts->frame_control = |
4657 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
4658 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
4659 | frame_txctl); | |
e2ebc74d JB |
4660 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
4661 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
4662 | } | |
4663 | EXPORT_SYMBOL(ieee80211_rts_get); | |
4664 | ||
32bfd35d | 4665 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 4666 | const void *frame, size_t frame_len, |
e039fa4a | 4667 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
4668 | struct ieee80211_cts *cts) |
4669 | { | |
4670 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 4671 | |
065e9605 HH |
4672 | cts->frame_control = |
4673 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
4674 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
4675 | frame_len, frame_txctl); | |
e2ebc74d JB |
4676 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
4677 | } | |
4678 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
4679 | ||
4680 | struct sk_buff * | |
32bfd35d | 4681 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 4682 | struct ieee80211_vif *vif) |
e2ebc74d JB |
4683 | { |
4684 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 4685 | struct sk_buff *skb = NULL; |
5cf121c3 | 4686 | struct ieee80211_tx_data tx; |
e2ebc74d | 4687 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 4688 | struct ps_data *ps; |
e039fa4a | 4689 | struct ieee80211_tx_info *info; |
55de908a | 4690 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 4691 | |
32bfd35d | 4692 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 4693 | |
5dfdaf58 | 4694 | rcu_read_lock(); |
55de908a | 4695 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 4696 | |
d012a605 MP |
4697 | if (!chanctx_conf) |
4698 | goto out; | |
4699 | ||
4700 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
4701 | struct beacon_data *beacon = | |
4702 | rcu_dereference(sdata->u.ap.beacon); | |
4703 | ||
4704 | if (!beacon || !beacon->head) | |
4705 | goto out; | |
4706 | ||
4707 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
4708 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
4709 | ps = &sdata->u.mesh.ps; | |
d012a605 | 4710 | } else { |
747cf5e9 | 4711 | goto out; |
d012a605 | 4712 | } |
5dfdaf58 | 4713 | |
d012a605 | 4714 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 4715 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 4716 | |
e2ebc74d | 4717 | while (1) { |
d012a605 | 4718 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 4719 | if (!skb) |
747cf5e9 | 4720 | goto out; |
e2ebc74d JB |
4721 | local->total_ps_buffered--; |
4722 | ||
d012a605 | 4723 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
4724 | struct ieee80211_hdr *hdr = |
4725 | (struct ieee80211_hdr *) skb->data; | |
4726 | /* more buffered multicast/broadcast frames ==> set | |
4727 | * MoreData flag in IEEE 802.11 header to inform PS | |
4728 | * STAs */ | |
4729 | hdr->frame_control |= | |
4730 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
4731 | } | |
4732 | ||
112c44b2 | 4733 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 4734 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 4735 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d | 4736 | break; |
6b07d9ca | 4737 | ieee80211_free_txskb(hw, skb); |
e2ebc74d | 4738 | } |
e039fa4a JB |
4739 | |
4740 | info = IEEE80211_SKB_CB(skb); | |
4741 | ||
5cf121c3 | 4742 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 4743 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 4744 | |
97b045d6 | 4745 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 4746 | skb = NULL; |
97b045d6 | 4747 | out: |
d0709a65 | 4748 | rcu_read_unlock(); |
e2ebc74d JB |
4749 | |
4750 | return skb; | |
4751 | } | |
4752 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 4753 | |
b6da911b LK |
4754 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
4755 | { | |
4756 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
4757 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
4758 | struct ieee80211_local *local = sdata->local; | |
4759 | int ret; | |
4760 | u32 queues; | |
4761 | ||
4762 | lockdep_assert_held(&local->sta_mtx); | |
4763 | ||
4764 | /* only some cases are supported right now */ | |
4765 | switch (sdata->vif.type) { | |
4766 | case NL80211_IFTYPE_STATION: | |
4767 | case NL80211_IFTYPE_AP: | |
4768 | case NL80211_IFTYPE_AP_VLAN: | |
4769 | break; | |
4770 | default: | |
4771 | WARN_ON(1); | |
4772 | return -EINVAL; | |
4773 | } | |
4774 | ||
4775 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
4776 | return -EINVAL; | |
4777 | ||
4778 | if (sta->reserved_tid == tid) { | |
4779 | ret = 0; | |
4780 | goto out; | |
4781 | } | |
4782 | ||
4783 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
4784 | sdata_err(sdata, "TID reservation already active\n"); | |
4785 | ret = -EALREADY; | |
4786 | goto out; | |
4787 | } | |
4788 | ||
4789 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
4790 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
4791 | ||
4792 | synchronize_net(); | |
4793 | ||
4794 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
30686bf7 | 4795 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) { |
b6da911b LK |
4796 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
4797 | __ieee80211_stop_tx_ba_session(sta, tid, | |
4798 | AGG_STOP_LOCAL_REQUEST); | |
4799 | } | |
4800 | ||
4801 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 4802 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
4803 | |
4804 | sta->reserved_tid = tid; | |
4805 | ||
4806 | ieee80211_wake_vif_queues(local, sdata, | |
4807 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
4808 | ||
30686bf7 | 4809 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) |
b6da911b LK |
4810 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
4811 | ||
4812 | ret = 0; | |
4813 | out: | |
4814 | return ret; | |
4815 | } | |
4816 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
4817 | ||
4818 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
4819 | { | |
4820 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
4821 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
4822 | ||
4823 | lockdep_assert_held(&sdata->local->sta_mtx); | |
4824 | ||
4825 | /* only some cases are supported right now */ | |
4826 | switch (sdata->vif.type) { | |
4827 | case NL80211_IFTYPE_STATION: | |
4828 | case NL80211_IFTYPE_AP: | |
4829 | case NL80211_IFTYPE_AP_VLAN: | |
4830 | break; | |
4831 | default: | |
4832 | WARN_ON(1); | |
4833 | return; | |
4834 | } | |
4835 | ||
4836 | if (tid != sta->reserved_tid) { | |
4837 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
4838 | return; | |
4839 | } | |
4840 | ||
4841 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
4842 | } | |
4843 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
4844 | ||
55de908a JB |
4845 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
4846 | struct sk_buff *skb, int tid, | |
b9771d41 | 4847 | enum nl80211_band band, u32 txdata_flags) |
3b8d81e0 | 4848 | { |
731977e9 | 4849 | int ac = ieee80211_ac_from_tid(tid); |
3a25a8c8 | 4850 | |
d57a544d | 4851 | skb_reset_mac_header(skb); |
3a25a8c8 | 4852 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 4853 | skb->priority = tid; |
cf0277e7 | 4854 | |
89afe614 JB |
4855 | skb->dev = sdata->dev; |
4856 | ||
3d34deb6 JB |
4857 | /* |
4858 | * The other path calling ieee80211_xmit is from the tasklet, | |
4859 | * and while we can handle concurrent transmissions locking | |
4860 | * requirements are that we do not come into tx with bhs on. | |
4861 | */ | |
4862 | local_bh_disable(); | |
73c4e195 | 4863 | IEEE80211_SKB_CB(skb)->band = band; |
b9771d41 | 4864 | ieee80211_xmit(sdata, NULL, skb, txdata_flags); |
3d34deb6 | 4865 | local_bh_enable(); |
3b8d81e0 | 4866 | } |
91180649 DK |
4867 | |
4868 | int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, | |
4869 | const u8 *buf, size_t len, | |
4870 | const u8 *dest, __be16 proto, bool unencrypted) | |
4871 | { | |
4872 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4873 | struct ieee80211_local *local = sdata->local; | |
4874 | struct sk_buff *skb; | |
4875 | struct ethhdr *ehdr; | |
4876 | u32 flags; | |
4877 | ||
4878 | /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE | |
4879 | * or Pre-Authentication | |
4880 | */ | |
4881 | if (proto != sdata->control_port_protocol && | |
4882 | proto != cpu_to_be16(ETH_P_PREAUTH)) | |
4883 | return -EINVAL; | |
4884 | ||
4885 | if (unencrypted) | |
4886 | flags = IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
4887 | else | |
4888 | flags = 0; | |
4889 | ||
4890 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
4891 | sizeof(struct ethhdr) + len); | |
4892 | if (!skb) | |
4893 | return -ENOMEM; | |
4894 | ||
4895 | skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr)); | |
4896 | ||
4897 | skb_put_data(skb, buf, len); | |
4898 | ||
4899 | ehdr = skb_push(skb, sizeof(struct ethhdr)); | |
4900 | memcpy(ehdr->h_dest, dest, ETH_ALEN); | |
4901 | memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN); | |
4902 | ehdr->h_proto = proto; | |
4903 | ||
4904 | skb->dev = dev; | |
4905 | skb->protocol = htons(ETH_P_802_3); | |
4906 | skb_reset_network_header(skb); | |
4907 | skb_reset_mac_header(skb); | |
4908 | ||
e7441c92 | 4909 | local_bh_disable(); |
91180649 | 4910 | __ieee80211_subif_start_xmit(skb, skb->dev, flags); |
e7441c92 | 4911 | local_bh_enable(); |
91180649 DK |
4912 | |
4913 | return 0; | |
4914 | } |