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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
e2ebc74d JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * | |
13 | * Transmit and frame generation functions. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
ebceec86 | 19 | #include <linux/if_vlan.h> |
e2ebc74d JB |
20 | #include <linux/etherdevice.h> |
21 | #include <linux/bitmap.h> | |
d4e46a3d | 22 | #include <linux/rcupdate.h> |
bc3b2d7f | 23 | #include <linux/export.h> |
881d966b | 24 | #include <net/net_namespace.h> |
e2ebc74d JB |
25 | #include <net/ieee80211_radiotap.h> |
26 | #include <net/cfg80211.h> | |
27 | #include <net/mac80211.h> | |
5caa328e MK |
28 | #include <net/codel.h> |
29 | #include <net/codel_impl.h> | |
e2ebc74d | 30 | #include <asm/unaligned.h> |
fa962b92 | 31 | #include <net/fq_impl.h> |
e2ebc74d JB |
32 | |
33 | #include "ieee80211_i.h" | |
24487981 | 34 | #include "driver-ops.h" |
2c8dccc7 | 35 | #include "led.h" |
33b64eb2 | 36 | #include "mesh.h" |
e2ebc74d JB |
37 | #include "wep.h" |
38 | #include "wpa.h" | |
39 | #include "wme.h" | |
2c8dccc7 | 40 | #include "rate.h" |
e2ebc74d | 41 | |
e2ebc74d JB |
42 | /* misc utils */ |
43 | ||
5a490510 JB |
44 | static inline void ieee80211_tx_stats(struct net_device *dev, u32 len) |
45 | { | |
46 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); | |
47 | ||
48 | u64_stats_update_begin(&tstats->syncp); | |
49 | tstats->tx_packets++; | |
50 | tstats->tx_bytes += len; | |
51 | u64_stats_update_end(&tstats->syncp); | |
52 | } | |
53 | ||
252b86c4 JB |
54 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
55 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 56 | int next_frag_len) |
e2ebc74d | 57 | { |
2103dec1 | 58 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 59 | struct ieee80211_rate *txrate; |
e2ebc74d | 60 | struct ieee80211_local *local = tx->local; |
8318d78a | 61 | struct ieee80211_supported_band *sband; |
358c8d9d | 62 | struct ieee80211_hdr *hdr; |
252b86c4 | 63 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
64 | struct ieee80211_chanctx_conf *chanctx_conf; |
65 | u32 rate_flags = 0; | |
66 | ||
95cd470c FF |
67 | /* assume HW handles this */ |
68 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) | |
69 | return 0; | |
70 | ||
2103dec1 SW |
71 | rcu_read_lock(); |
72 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
73 | if (chanctx_conf) { | |
74 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
75 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
76 | } | |
77 | rcu_read_unlock(); | |
e6a9854b | 78 | |
e6a9854b | 79 | /* uh huh? */ |
0d528d85 | 80 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 81 | return 0; |
e2ebc74d | 82 | |
2d56577b | 83 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 84 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 85 | |
e6a9854b | 86 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
87 | |
88 | /* | |
89 | * data and mgmt (except PS Poll): | |
90 | * - during CFP: 32768 | |
91 | * - during contention period: | |
92 | * if addr1 is group address: 0 | |
93 | * if more fragments = 0 and addr1 is individual address: time to | |
94 | * transmit one ACK plus SIFS | |
95 | * if more fragments = 1 and addr1 is individual address: time to | |
96 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
97 | * | |
98 | * IEEE 802.11, 9.6: | |
99 | * - control response frame (CTS or ACK) shall be transmitted using the | |
100 | * same rate as the immediately previous frame in the frame exchange | |
101 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
102 | * at the highest possible rate belonging to the PHY rates in the | |
103 | * BSSBasicRateSet | |
104 | */ | |
252b86c4 | 105 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 106 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 107 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 108 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
109 | * needs to be updated to support duration field calculation. |
110 | * | |
111 | * RTS: time needed to transmit pending data/mgmt frame plus | |
112 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
113 | * CTS: duration of immediately previous RTS minus time | |
114 | * required to transmit CTS and its SIFS | |
115 | * ACK: 0 if immediately previous directed data/mgmt had | |
116 | * more=0, with more=1 duration in ACK frame is duration | |
117 | * from previous frame minus time needed to transmit ACK | |
118 | * and its SIFS | |
119 | * PS Poll: BIT(15) | BIT(14) | aid | |
120 | */ | |
121 | return 0; | |
122 | } | |
123 | ||
124 | /* data/mgmt */ | |
125 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 126 | return cpu_to_le16(32768); |
e2ebc74d JB |
127 | |
128 | if (group_addr) /* Group address as the destination - no ACK */ | |
129 | return 0; | |
130 | ||
131 | /* Individual destination address: | |
132 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
133 | * CTS and ACK frames shall be transmitted using the highest rate in | |
134 | * basic rate set that is less than or equal to the rate of the | |
135 | * immediately previous frame and that is using the same modulation | |
136 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
137 | * the highest mandatory rate of the PHY that is less than or equal to | |
138 | * the rate of the previous frame is used. | |
139 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
140 | */ | |
141 | rate = -1; | |
8318d78a JB |
142 | /* use lowest available if everything fails */ |
143 | mrate = sband->bitrates[0].bitrate; | |
144 | for (i = 0; i < sband->n_bitrates; i++) { | |
145 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 146 | |
8318d78a JB |
147 | if (r->bitrate > txrate->bitrate) |
148 | break; | |
e2ebc74d | 149 | |
2103dec1 SW |
150 | if ((rate_flags & r->flags) != rate_flags) |
151 | continue; | |
152 | ||
bda3933a | 153 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 154 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
155 | |
156 | switch (sband->band) { | |
57fbcce3 | 157 | case NL80211_BAND_2GHZ: { |
8318d78a JB |
158 | u32 flag; |
159 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
160 | flag = IEEE80211_RATE_MANDATORY_G; | |
161 | else | |
162 | flag = IEEE80211_RATE_MANDATORY_B; | |
163 | if (r->flags & flag) | |
164 | mrate = r->bitrate; | |
165 | break; | |
166 | } | |
57fbcce3 | 167 | case NL80211_BAND_5GHZ: |
8318d78a JB |
168 | if (r->flags & IEEE80211_RATE_MANDATORY_A) |
169 | mrate = r->bitrate; | |
170 | break; | |
57fbcce3 | 171 | case NL80211_BAND_60GHZ: |
3a0c52a6 | 172 | /* TODO, for now fall through */ |
57fbcce3 | 173 | case NUM_NL80211_BANDS: |
8318d78a JB |
174 | WARN_ON(1); |
175 | break; | |
176 | } | |
e2ebc74d JB |
177 | } |
178 | if (rate == -1) { | |
179 | /* No matching basic rate found; use highest suitable mandatory | |
180 | * PHY rate */ | |
2103dec1 | 181 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
182 | } |
183 | ||
6674f210 SW |
184 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
185 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 186 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
187 | dur = 0; |
188 | else | |
189 | /* Time needed to transmit ACK | |
190 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
191 | * to closest integer */ | |
4ee73f33 | 192 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
193 | tx->sdata->vif.bss_conf.use_short_preamble, |
194 | shift); | |
e2ebc74d JB |
195 | |
196 | if (next_frag_len) { | |
197 | /* Frame is fragmented: duration increases with time needed to | |
198 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
199 | dur *= 2; /* ACK + SIFS */ | |
200 | /* next fragment */ | |
4ee73f33 | 201 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 202 | txrate->bitrate, erp, |
438b61b7 SW |
203 | tx->sdata->vif.bss_conf.use_short_preamble, |
204 | shift); | |
e2ebc74d JB |
205 | } |
206 | ||
03f93c3d | 207 | return cpu_to_le16(dur); |
e2ebc74d JB |
208 | } |
209 | ||
e2ebc74d | 210 | /* tx handlers */ |
5c1b98a5 KV |
211 | static ieee80211_tx_result debug_noinline |
212 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
213 | { | |
214 | struct ieee80211_local *local = tx->local; | |
0c74211d | 215 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
216 | |
217 | /* driver doesn't support power save */ | |
30686bf7 | 218 | if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS)) |
5c1b98a5 KV |
219 | return TX_CONTINUE; |
220 | ||
221 | /* hardware does dynamic power save */ | |
30686bf7 | 222 | if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) |
5c1b98a5 KV |
223 | return TX_CONTINUE; |
224 | ||
225 | /* dynamic power save disabled */ | |
226 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
227 | return TX_CONTINUE; | |
228 | ||
229 | /* we are scanning, don't enable power save */ | |
230 | if (local->scanning) | |
231 | return TX_CONTINUE; | |
232 | ||
233 | if (!local->ps_sdata) | |
234 | return TX_CONTINUE; | |
235 | ||
236 | /* No point if we're going to suspend */ | |
237 | if (local->quiescing) | |
238 | return TX_CONTINUE; | |
239 | ||
0c74211d KV |
240 | /* dynamic ps is supported only in managed mode */ |
241 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
242 | return TX_CONTINUE; | |
243 | ||
244 | ifmgd = &tx->sdata->u.mgd; | |
245 | ||
246 | /* | |
247 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
248 | * u-apsd enabled and the frame is in voip class. This effectively | |
249 | * means that even if all access categories have u-apsd enabled, in | |
250 | * practise u-apsd is only used with the voip ac. This is a | |
251 | * workaround for the case when received voip class packets do not | |
252 | * have correct qos tag for some reason, due the network or the | |
253 | * peer application. | |
254 | * | |
dc41e4d4 | 255 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
256 | * changed via debugfs, user needs to reassociate manually to have |
257 | * everything in sync. | |
258 | */ | |
4875d30d JB |
259 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
260 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
261 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
262 | return TX_CONTINUE; |
263 | ||
5c1b98a5 KV |
264 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
265 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 266 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
267 | IEEE80211_QUEUE_STOP_REASON_PS, |
268 | false); | |
db28569a | 269 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
270 | ieee80211_queue_work(&local->hw, |
271 | &local->dynamic_ps_disable_work); | |
272 | } | |
273 | ||
5db1c07c LC |
274 | /* Don't restart the timer if we're not disassociated */ |
275 | if (!ifmgd->associated) | |
276 | return TX_CONTINUE; | |
277 | ||
5c1b98a5 KV |
278 | mod_timer(&local->dynamic_ps_timer, jiffies + |
279 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
280 | ||
281 | return TX_CONTINUE; | |
282 | } | |
e2ebc74d | 283 | |
d9e8a70f | 284 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 285 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 286 | { |
358c8d9d | 287 | |
e039fa4a | 288 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 289 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 290 | bool assoc = false; |
e2ebc74d | 291 | |
e039fa4a | 292 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 293 | return TX_CONTINUE; |
58d4185e | 294 | |
b23b025f BG |
295 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
296 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
297 | !ieee80211_is_probe_req(hdr->frame_control) && |
298 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
299 | /* | |
300 | * When software scanning only nullfunc frames (to notify | |
301 | * the sleep state to the AP) and probe requests (for the | |
302 | * active scan) are allowed, all other frames should not be | |
303 | * sent and we should not get here, but if we do | |
304 | * nonetheless, drop them to avoid sending them | |
305 | * off-channel. See the link below and | |
306 | * ieee80211_start_scan() for more. | |
307 | * | |
308 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
309 | */ | |
9ae54c84 | 310 | return TX_DROP; |
e2ebc74d | 311 | |
239281f8 RL |
312 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
313 | return TX_CONTINUE; | |
314 | ||
1be7fe8d BJ |
315 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
316 | return TX_CONTINUE; | |
317 | ||
5cf121c3 | 318 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 319 | return TX_CONTINUE; |
e2ebc74d | 320 | |
c2c98fde JB |
321 | if (tx->sta) |
322 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 323 | |
5cf121c3 | 324 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 325 | if (unlikely(!assoc && |
358c8d9d | 326 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 327 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
328 | sdata_info(tx->sdata, |
329 | "dropped data frame to not associated station %pM\n", | |
330 | hdr->addr1); | |
331 | #endif | |
e2ebc74d | 332 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 333 | return TX_DROP; |
e2ebc74d | 334 | } |
72f15d53 MB |
335 | } else if (unlikely(ieee80211_is_data(hdr->frame_control) && |
336 | ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) { | |
29623892 JB |
337 | /* |
338 | * No associated STAs - no need to send multicast | |
339 | * frames. | |
340 | */ | |
341 | return TX_DROP; | |
e2ebc74d JB |
342 | } |
343 | ||
9ae54c84 | 344 | return TX_CONTINUE; |
e2ebc74d JB |
345 | } |
346 | ||
e2ebc74d JB |
347 | /* This function is called whenever the AP is about to exceed the maximum limit |
348 | * of buffered frames for power saving STAs. This situation should not really | |
349 | * happen often during normal operation, so dropping the oldest buffered packet | |
350 | * from each queue should be OK to make some room for new frames. */ | |
351 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
352 | { | |
353 | int total = 0, purged = 0; | |
354 | struct sk_buff *skb; | |
355 | struct ieee80211_sub_if_data *sdata; | |
356 | struct sta_info *sta; | |
357 | ||
79010420 | 358 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
359 | struct ps_data *ps; |
360 | ||
361 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
362 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
363 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
364 | ps = &sdata->u.mesh.ps; | |
d012a605 | 365 | else |
e2ebc74d | 366 | continue; |
d012a605 MP |
367 | |
368 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
369 | if (skb) { |
370 | purged++; | |
6b07d9ca | 371 | ieee80211_free_txskb(&local->hw, skb); |
e2ebc74d | 372 | } |
d012a605 | 373 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 374 | } |
e2ebc74d | 375 | |
948d887d JB |
376 | /* |
377 | * Drop one frame from each station from the lowest-priority | |
378 | * AC that has frames at all. | |
379 | */ | |
d0709a65 | 380 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
381 | int ac; |
382 | ||
383 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
384 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
385 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
386 | if (skb) { | |
387 | purged++; | |
c3e7724b | 388 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
389 | break; |
390 | } | |
e2ebc74d | 391 | } |
e2ebc74d | 392 | } |
d0709a65 | 393 | |
e2ebc74d | 394 | local->total_ps_buffered = total; |
bdcbd8e0 | 395 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
396 | } |
397 | ||
9ae54c84 | 398 | static ieee80211_tx_result |
5cf121c3 | 399 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 400 | { |
e039fa4a | 401 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 402 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 403 | struct ps_data *ps; |
e039fa4a | 404 | |
7d54d0dd JB |
405 | /* |
406 | * broadcast/multicast frame | |
407 | * | |
3f52b7e3 | 408 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
409 | * the frame is buffered to be sent after DTIM beacon frame. |
410 | * This is done either by the hardware or us. | |
411 | */ | |
412 | ||
3f52b7e3 | 413 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
414 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
415 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
416 | if (!tx->sdata->bss) | |
417 | return TX_CONTINUE; | |
418 | ||
419 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
420 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
421 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 422 | } else { |
3e122be0 | 423 | return TX_CONTINUE; |
d012a605 MP |
424 | } |
425 | ||
3e122be0 JB |
426 | |
427 | /* no buffering for ordered frames */ | |
358c8d9d | 428 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 429 | return TX_CONTINUE; |
7d54d0dd | 430 | |
08b99399 JB |
431 | if (ieee80211_is_probe_req(hdr->frame_control)) |
432 | return TX_CONTINUE; | |
433 | ||
30686bf7 | 434 | if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL)) |
f4d57941 JB |
435 | info->hw_queue = tx->sdata->vif.cab_queue; |
436 | ||
7d54d0dd | 437 | /* no stations in PS mode */ |
d012a605 | 438 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 439 | return TX_CONTINUE; |
7d54d0dd | 440 | |
62b517cb | 441 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 442 | |
62b517cb | 443 | /* device releases frame after DTIM beacon */ |
30686bf7 | 444 | if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING)) |
62b1208e | 445 | return TX_CONTINUE; |
62b1208e | 446 | |
7d54d0dd | 447 | /* buffered in mac80211 */ |
62b1208e JB |
448 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
449 | purge_old_ps_buffers(tx->local); | |
450 | ||
d012a605 | 451 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
452 | ps_dbg(tx->sdata, |
453 | "BC TX buffer full - dropping the oldest frame\n"); | |
6b07d9ca | 454 | ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
455 | } else |
456 | tx->local->total_ps_buffered++; | |
e2ebc74d | 457 | |
d012a605 | 458 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 459 | |
62b1208e | 460 | return TX_QUEUED; |
e2ebc74d JB |
461 | } |
462 | ||
fb733336 JM |
463 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
464 | struct sk_buff *skb) | |
465 | { | |
466 | if (!ieee80211_is_mgmt(fc)) | |
467 | return 0; | |
468 | ||
c2c98fde | 469 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
470 | return 0; |
471 | ||
d8ca16db | 472 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
473 | return 0; |
474 | ||
475 | return 1; | |
476 | } | |
477 | ||
9ae54c84 | 478 | static ieee80211_tx_result |
5cf121c3 | 479 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
480 | { |
481 | struct sta_info *sta = tx->sta; | |
e039fa4a | 482 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 483 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 484 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 485 | |
02f2f1a9 | 486 | if (unlikely(!sta)) |
9ae54c84 | 487 | return TX_CONTINUE; |
e2ebc74d | 488 | |
c2c98fde | 489 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
490 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
491 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 492 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
493 | int ac = skb_get_queue_mapping(tx->skb); |
494 | ||
08b99399 JB |
495 | if (ieee80211_is_mgmt(hdr->frame_control) && |
496 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
497 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
498 | return TX_CONTINUE; | |
499 | } | |
500 | ||
bdcbd8e0 JB |
501 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
502 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
503 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
504 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
505 | |
506 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
507 | spin_lock(&sta->ps_lock); | |
508 | /* | |
509 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
510 | * been queued to pending queue. No reordering can happen, go | |
511 | * ahead and Tx the packet. | |
512 | */ | |
513 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
514 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
515 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
516 | spin_unlock(&sta->ps_lock); |
517 | return TX_CONTINUE; | |
518 | } | |
519 | ||
948d887d JB |
520 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
521 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
522 | ps_dbg(tx->sdata, |
523 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
524 | sta->sta.addr, ac); | |
c3e7724b | 525 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
526 | } else |
527 | tx->local->total_ps_buffered++; | |
004c872e | 528 | |
e039fa4a | 529 | info->control.jiffies = jiffies; |
5061b0c2 | 530 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 531 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
03c8c06f | 532 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 533 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 534 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
535 | |
536 | if (!timer_pending(&local->sta_cleanup)) | |
537 | mod_timer(&local->sta_cleanup, | |
538 | round_jiffies(jiffies + | |
539 | STA_INFO_CLEANUP_INTERVAL)); | |
540 | ||
c868cb35 JB |
541 | /* |
542 | * We queued up some frames, so the TIM bit might | |
543 | * need to be set, recalculate it. | |
544 | */ | |
545 | sta_info_recalc_tim(sta); | |
546 | ||
9ae54c84 | 547 | return TX_QUEUED; |
bdcbd8e0 JB |
548 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
549 | ps_dbg(tx->sdata, | |
550 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
551 | sta->sta.addr); | |
e2ebc74d | 552 | } |
e2ebc74d | 553 | |
9ae54c84 | 554 | return TX_CONTINUE; |
e2ebc74d JB |
555 | } |
556 | ||
d9e8a70f | 557 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 558 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 559 | { |
5cf121c3 | 560 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 561 | return TX_CONTINUE; |
e2ebc74d | 562 | |
5cf121c3 | 563 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
564 | return ieee80211_tx_h_unicast_ps_buf(tx); |
565 | else | |
566 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
567 | } | |
568 | ||
a621fa4d JB |
569 | static ieee80211_tx_result debug_noinline |
570 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
571 | { | |
572 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
573 | ||
af61a165 JB |
574 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
575 | if (tx->sdata->control_port_no_encrypt) | |
576 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
577 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
9c1c98a3 | 578 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
af61a165 | 579 | } |
a621fa4d JB |
580 | |
581 | return TX_CONTINUE; | |
582 | } | |
583 | ||
d9e8a70f | 584 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 585 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 586 | { |
46e6de15 | 587 | struct ieee80211_key *key; |
e039fa4a | 588 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 589 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 590 | |
3b8d81e0 | 591 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 592 | tx->key = NULL; |
2475b1cc MS |
593 | else if (tx->sta && |
594 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 595 | tx->key = key; |
46f6b060 MH |
596 | else if (ieee80211_is_group_privacy_action(tx->skb) && |
597 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
598 | tx->key = key; | |
3cfcf6ac | 599 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 600 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 601 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
602 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
603 | tx->key = key; | |
f7e0104c JB |
604 | else if (is_multicast_ether_addr(hdr->addr1) && |
605 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
606 | tx->key = key; | |
607 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
608 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 609 | tx->key = key; |
e8f4fb7c | 610 | else |
4922f71f | 611 | tx->key = NULL; |
e2ebc74d JB |
612 | |
613 | if (tx->key) { | |
813d7669 JB |
614 | bool skip_hw = false; |
615 | ||
011bfcc4 | 616 | /* TODO: add threshold stuff again */ |
176e4f84 | 617 | |
97359d12 JB |
618 | switch (tx->key->conf.cipher) { |
619 | case WLAN_CIPHER_SUITE_WEP40: | |
620 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 621 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 622 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
623 | tx->key = NULL; |
624 | break; | |
97359d12 | 625 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 626 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
627 | case WLAN_CIPHER_SUITE_GCMP: |
628 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
629 | if (!ieee80211_is_data_present(hdr->frame_control) && |
630 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
46f6b060 MH |
631 | tx->skb) && |
632 | !ieee80211_is_group_privacy_action(tx->skb)) | |
fb733336 | 633 | tx->key = NULL; |
3b43a187 KV |
634 | else |
635 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 636 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 637 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 638 | break; |
97359d12 | 639 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 640 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
641 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
642 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
643 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
644 | tx->key = NULL; | |
645 | break; | |
176e4f84 | 646 | } |
813d7669 | 647 | |
e54faf29 JB |
648 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
649 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
650 | return TX_DROP; |
651 | ||
f12553eb | 652 | if (!skip_hw && tx->key && |
382b1655 | 653 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 654 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
655 | } |
656 | ||
9ae54c84 | 657 | return TX_CONTINUE; |
e2ebc74d JB |
658 | } |
659 | ||
d9e8a70f | 660 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 661 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 662 | { |
e039fa4a | 663 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
664 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
665 | struct ieee80211_supported_band *sband; | |
a2c40249 | 666 | u32 len; |
e6a9854b | 667 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 668 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 669 | bool assoc = false; |
8318d78a | 670 | |
e6a9854b | 671 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 672 | |
2d56577b | 673 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 674 | |
a2c40249 | 675 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 676 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
677 | |
678 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 679 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
680 | txrc.sband = sband; |
681 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
682 | txrc.skb = tx->skb; | |
683 | txrc.reported_rate.idx = -1; | |
2d56577b | 684 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
2ffbe6d3 FF |
685 | |
686 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
687 | txrc.rate_idx_mcs_mask = | |
688 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
689 | ||
8f0729b1 | 690 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 691 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
5765f9f6 BVB |
692 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC || |
693 | tx->sdata->vif.type == NL80211_IFTYPE_OCB); | |
e6a9854b JB |
694 | |
695 | /* set up RTS protection if desired */ | |
b9a5f8ca | 696 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 697 | txrc.rts = true; |
e2ebc74d | 698 | } |
e2ebc74d | 699 | |
0d528d85 | 700 | info->control.use_rts = txrc.rts; |
991fec09 FF |
701 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
702 | ||
e6a9854b JB |
703 | /* |
704 | * Use short preamble if the BSS can handle it, but not for | |
705 | * management frames unless we know the receiver can handle | |
706 | * that -- the management frame might be to a station that | |
707 | * just wants a probe response. | |
708 | */ | |
709 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
710 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 711 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
712 | txrc.short_preamble = true; |
713 | ||
714 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 715 | |
dfdfc2be SE |
716 | /* don't ask rate control when rate already injected via radiotap */ |
717 | if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT) | |
718 | return TX_CONTINUE; | |
719 | ||
c2c98fde JB |
720 | if (tx->sta) |
721 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
722 | |
723 | /* | |
724 | * Lets not bother rate control if we're associated and cannot | |
725 | * talk to the sta. This should not happen. | |
726 | */ | |
c2c98fde | 727 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
728 | !rate_usable_index_exists(sband, &tx->sta->sta), |
729 | "%s: Dropped data frame as no usable bitrate found while " | |
730 | "scanning and associated. Target station: " | |
731 | "%pM on %d GHz band\n", | |
47846c9b | 732 | tx->sdata->name, hdr->addr1, |
2d56577b | 733 | info->band ? 5 : 2)) |
b770b43e | 734 | return TX_DROP; |
2e92e6f2 | 735 | |
b770b43e LR |
736 | /* |
737 | * If we're associated with the sta at this point we know we can at | |
738 | * least send the frame at the lowest bit rate. | |
739 | */ | |
e6a9854b JB |
740 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
741 | ||
0d528d85 FF |
742 | if (tx->sta && !info->control.skip_table) |
743 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
744 | ||
745 | if (unlikely(info->control.rates[0].idx < 0)) { | |
746 | if (ratetbl) { | |
747 | struct ieee80211_tx_rate rate = { | |
748 | .idx = ratetbl->rate[0].idx, | |
749 | .flags = ratetbl->rate[0].flags, | |
750 | .count = ratetbl->rate[0].count | |
751 | }; | |
752 | ||
753 | if (ratetbl->rate[0].idx < 0) | |
754 | return TX_DROP; | |
755 | ||
756 | tx->rate = rate; | |
757 | } else { | |
758 | return TX_DROP; | |
759 | } | |
760 | } else { | |
761 | tx->rate = info->control.rates[0]; | |
762 | } | |
e6a9854b | 763 | |
c1ce5a74 | 764 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 765 | txrc.reported_rate = tx->rate; |
c1ce5a74 | 766 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
e5a9f8d0 | 767 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
c1ce5a74 | 768 | } else if (tx->sta) |
e5a9f8d0 | 769 | tx->sta->tx_stats.last_rate = txrc.reported_rate; |
e039fa4a | 770 | |
0d528d85 FF |
771 | if (ratetbl) |
772 | return TX_CONTINUE; | |
773 | ||
e6a9854b JB |
774 | if (unlikely(!info->control.rates[0].count)) |
775 | info->control.rates[0].count = 1; | |
e2ebc74d | 776 | |
9955151d GS |
777 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
778 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
779 | info->control.rates[0].count = 1; | |
780 | ||
e6a9854b JB |
781 | return TX_CONTINUE; |
782 | } | |
783 | ||
ba8c3d6f FF |
784 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
785 | { | |
786 | u16 *seq = &sta->tid_seq[tid]; | |
787 | __le16 ret = cpu_to_le16(*seq); | |
788 | ||
789 | /* Increase the sequence number. */ | |
790 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
791 | ||
792 | return ret; | |
793 | } | |
794 | ||
f591fa5d JB |
795 | static ieee80211_tx_result debug_noinline |
796 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
797 | { | |
798 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
799 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
f591fa5d JB |
800 | u8 *qc; |
801 | int tid; | |
802 | ||
25d834e1 JB |
803 | /* |
804 | * Packet injection may want to control the sequence | |
805 | * number, if we have no matching interface then we | |
806 | * neither assign one ourselves nor ask the driver to. | |
807 | */ | |
5061b0c2 | 808 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
809 | return TX_CONTINUE; |
810 | ||
f591fa5d JB |
811 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
812 | return TX_CONTINUE; | |
813 | ||
814 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
815 | return TX_CONTINUE; | |
816 | ||
49a59543 JB |
817 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
818 | return TX_CONTINUE; | |
819 | ||
94778280 JB |
820 | /* |
821 | * Anything but QoS data that has a sequence number field | |
822 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
823 | * counter. QoS data frames with a multicast destination |
824 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 825 | */ |
c4c205f3 BC |
826 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
827 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 828 | /* driver should assign sequence number */ |
f591fa5d | 829 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
830 | /* for pure STA mode without beacons, we can do it */ |
831 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
832 | tx->sdata->sequence_number += 0x10; | |
79c892b8 | 833 | if (tx->sta) |
e5a9f8d0 | 834 | tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++; |
f591fa5d JB |
835 | return TX_CONTINUE; |
836 | } | |
837 | ||
838 | /* | |
839 | * This should be true for injected/management frames only, for | |
840 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
841 | * above since they are not QoS-data frames. | |
842 | */ | |
843 | if (!tx->sta) | |
844 | return TX_CONTINUE; | |
845 | ||
846 | /* include per-STA, per-TID sequence counter */ | |
847 | ||
848 | qc = ieee80211_get_qos_ctl(hdr); | |
849 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
e5a9f8d0 | 850 | tx->sta->tx_stats.msdu[tid]++; |
f591fa5d | 851 | |
bb42f2d1 | 852 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); |
f591fa5d JB |
853 | |
854 | return TX_CONTINUE; | |
855 | } | |
856 | ||
252b86c4 | 857 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
858 | struct sk_buff *skb, int hdrlen, |
859 | int frag_threshold) | |
860 | { | |
252b86c4 | 861 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 862 | struct ieee80211_tx_info *info; |
252b86c4 | 863 | struct sk_buff *tmp; |
2de8e0d9 JB |
864 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
865 | int pos = hdrlen + per_fragm; | |
866 | int rem = skb->len - hdrlen - per_fragm; | |
867 | ||
868 | if (WARN_ON(rem < 0)) | |
869 | return -EINVAL; | |
870 | ||
252b86c4 JB |
871 | /* first fragment was already added to queue by caller */ |
872 | ||
2de8e0d9 JB |
873 | while (rem) { |
874 | int fraglen = per_fragm; | |
875 | ||
876 | if (fraglen > rem) | |
877 | fraglen = rem; | |
878 | rem -= fraglen; | |
879 | tmp = dev_alloc_skb(local->tx_headroom + | |
880 | frag_threshold + | |
2475b1cc | 881 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
882 | IEEE80211_ENCRYPT_TAILROOM); |
883 | if (!tmp) | |
884 | return -ENOMEM; | |
252b86c4 JB |
885 | |
886 | __skb_queue_tail(&tx->skbs, tmp); | |
887 | ||
2475b1cc MS |
888 | skb_reserve(tmp, |
889 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
890 | ||
2de8e0d9 JB |
891 | /* copy control information */ |
892 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
893 | |
894 | info = IEEE80211_SKB_CB(tmp); | |
895 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
896 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
897 | ||
898 | if (rem) | |
899 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
900 | ||
2de8e0d9 JB |
901 | skb_copy_queue_mapping(tmp, skb); |
902 | tmp->priority = skb->priority; | |
2de8e0d9 | 903 | tmp->dev = skb->dev; |
2de8e0d9 JB |
904 | |
905 | /* copy header and data */ | |
906 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
907 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
908 | ||
909 | pos += fraglen; | |
910 | } | |
911 | ||
252b86c4 | 912 | /* adjust first fragment's length */ |
338f977f | 913 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
914 | return 0; |
915 | } | |
916 | ||
d9e8a70f | 917 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
918 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
919 | { | |
2de8e0d9 JB |
920 | struct sk_buff *skb = tx->skb; |
921 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
922 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 923 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
924 | int hdrlen; |
925 | int fragnum; | |
e2454948 | 926 | |
252b86c4 JB |
927 | /* no matter what happens, tx->skb moves to tx->skbs */ |
928 | __skb_queue_tail(&tx->skbs, skb); | |
929 | tx->skb = NULL; | |
930 | ||
a26eb27a JB |
931 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
932 | return TX_CONTINUE; | |
933 | ||
f3fe4e93 | 934 | if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG)) |
e2454948 JB |
935 | return TX_CONTINUE; |
936 | ||
eefce91a JB |
937 | /* |
938 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 939 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 940 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 941 | */ |
8b30b1fe | 942 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
943 | return TX_DROP; |
944 | ||
065e9605 | 945 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 946 | |
a26eb27a | 947 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 948 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 949 | return TX_DROP; |
e6a9854b | 950 | |
2de8e0d9 JB |
951 | /* |
952 | * Now fragment the frame. This will allocate all the fragments and | |
953 | * chain them (using skb as the first fragment) to skb->next. | |
954 | * During transmission, we will remove the successfully transmitted | |
955 | * fragments from this list. When the low-level driver rejects one | |
956 | * of the fragments then we will simply pretend to accept the skb | |
957 | * but store it away as pending. | |
958 | */ | |
252b86c4 | 959 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 960 | return TX_DROP; |
e6a9854b | 961 | |
2de8e0d9 JB |
962 | /* update duration/seq/flags of fragments */ |
963 | fragnum = 0; | |
252b86c4 JB |
964 | |
965 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 966 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 967 | |
2de8e0d9 JB |
968 | hdr = (void *)skb->data; |
969 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 970 | |
252b86c4 | 971 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 972 | hdr->frame_control |= morefrags; |
e6a9854b JB |
973 | /* |
974 | * No multi-rate retries for fragmented frames, that | |
975 | * would completely throw off the NAV at other STAs. | |
976 | */ | |
977 | info->control.rates[1].idx = -1; | |
978 | info->control.rates[2].idx = -1; | |
979 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 980 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 981 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
982 | } else { |
983 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 984 | } |
2de8e0d9 JB |
985 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
986 | fragnum++; | |
252b86c4 | 987 | } |
e2ebc74d | 988 | |
9ae54c84 | 989 | return TX_CONTINUE; |
e2ebc74d JB |
990 | } |
991 | ||
feff1f2f JB |
992 | static ieee80211_tx_result debug_noinline |
993 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
994 | { | |
252b86c4 | 995 | struct sk_buff *skb; |
560d2682 | 996 | int ac = -1; |
feff1f2f JB |
997 | |
998 | if (!tx->sta) | |
999 | return TX_CONTINUE; | |
1000 | ||
252b86c4 | 1001 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 1002 | ac = skb_get_queue_mapping(skb); |
e5a9f8d0 | 1003 | tx->sta->tx_stats.bytes[ac] += skb->len; |
252b86c4 | 1004 | } |
560d2682 | 1005 | if (ac >= 0) |
e5a9f8d0 | 1006 | tx->sta->tx_stats.packets[ac]++; |
feff1f2f JB |
1007 | |
1008 | return TX_CONTINUE; | |
1009 | } | |
1010 | ||
d9e8a70f | 1011 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1012 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1013 | { | |
1014 | if (!tx->key) | |
1015 | return TX_CONTINUE; | |
1016 | ||
97359d12 JB |
1017 | switch (tx->key->conf.cipher) { |
1018 | case WLAN_CIPHER_SUITE_WEP40: | |
1019 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1020 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1021 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1022 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1023 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1024 | return ieee80211_crypto_ccmp_encrypt( |
1025 | tx, IEEE80211_CCMP_MIC_LEN); | |
1026 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1027 | return ieee80211_crypto_ccmp_encrypt( | |
1028 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1029 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1030 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1031 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1032 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1033 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1034 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1035 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1036 | case WLAN_CIPHER_SUITE_GCMP: |
1037 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1038 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1039 | default: |
d32a1028 | 1040 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1041 | } |
1042 | ||
e2454948 JB |
1043 | return TX_DROP; |
1044 | } | |
1045 | ||
d9e8a70f | 1046 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1047 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1048 | { | |
252b86c4 | 1049 | struct sk_buff *skb; |
2de8e0d9 JB |
1050 | struct ieee80211_hdr *hdr; |
1051 | int next_len; | |
1052 | bool group_addr; | |
03f93c3d | 1053 | |
252b86c4 | 1054 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1055 | hdr = (void *) skb->data; |
7e0aae47 JM |
1056 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1057 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1058 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1059 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1060 | next_len = next->len; | |
1061 | } else | |
1062 | next_len = 0; | |
2de8e0d9 | 1063 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1064 | |
2de8e0d9 | 1065 | hdr->duration_id = |
252b86c4 JB |
1066 | ieee80211_duration(tx, skb, group_addr, next_len); |
1067 | } | |
03f93c3d JB |
1068 | |
1069 | return TX_CONTINUE; | |
1070 | } | |
1071 | ||
e2ebc74d JB |
1072 | /* actual transmit path */ |
1073 | ||
a622ab72 JB |
1074 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1075 | struct sk_buff *skb, | |
1076 | struct ieee80211_tx_info *info, | |
1077 | struct tid_ampdu_tx *tid_tx, | |
1078 | int tid) | |
1079 | { | |
1080 | bool queued = false; | |
285fa695 | 1081 | bool reset_agg_timer = false; |
aa454580 | 1082 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1083 | |
1084 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1085 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1086 | reset_agg_timer = true; |
0ab33703 JB |
1087 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1088 | /* | |
1089 | * nothing -- this aggregation session is being started | |
1090 | * but that might still fail with the driver | |
1091 | */ | |
ba8c3d6f | 1092 | } else if (!tx->sta->sta.txq[tid]) { |
a622ab72 JB |
1093 | spin_lock(&tx->sta->lock); |
1094 | /* | |
1095 | * Need to re-check now, because we may get here | |
1096 | * | |
1097 | * 1) in the window during which the setup is actually | |
1098 | * already done, but not marked yet because not all | |
1099 | * packets are spliced over to the driver pending | |
1100 | * queue yet -- if this happened we acquire the lock | |
1101 | * either before or after the splice happens, but | |
1102 | * need to recheck which of these cases happened. | |
1103 | * | |
1104 | * 2) during session teardown, if the OPERATIONAL bit | |
1105 | * was cleared due to the teardown but the pointer | |
1106 | * hasn't been assigned NULL yet (or we loaded it | |
1107 | * before it was assigned) -- in this case it may | |
1108 | * now be NULL which means we should just let the | |
1109 | * packet pass through because splicing the frames | |
1110 | * back is already done. | |
1111 | */ | |
40b275b6 | 1112 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1113 | |
1114 | if (!tid_tx) { | |
1115 | /* do nothing, let packet pass through */ | |
1116 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1117 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1118 | reset_agg_timer = true; |
a622ab72 JB |
1119 | } else { |
1120 | queued = true; | |
f6d4671a EG |
1121 | if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) { |
1122 | clear_sta_flag(tx->sta, WLAN_STA_SP); | |
1123 | ps_dbg(tx->sta->sdata, | |
1124 | "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n", | |
1125 | tx->sta->sta.addr, tx->sta->sta.aid); | |
1126 | } | |
a622ab72 JB |
1127 | info->control.vif = &tx->sdata->vif; |
1128 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
facde7f3 | 1129 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1130 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1131 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1132 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1133 | } |
1134 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1135 | |
1136 | if (purge_skb) | |
c3e7724b | 1137 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1138 | } |
1139 | ||
285fa695 NM |
1140 | /* reset session timer */ |
1141 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1142 | tid_tx->last_tx = jiffies; |
285fa695 | 1143 | |
a622ab72 JB |
1144 | return queued; |
1145 | } | |
1146 | ||
58d4185e JB |
1147 | /* |
1148 | * initialises @tx | |
7c10770f JB |
1149 | * pass %NULL for the station if unknown, a valid pointer if known |
1150 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1151 | */ |
9ae54c84 | 1152 | static ieee80211_tx_result |
3b8d81e0 JB |
1153 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1154 | struct ieee80211_tx_data *tx, | |
7c10770f | 1155 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1156 | { |
3b8d81e0 | 1157 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1158 | struct ieee80211_hdr *hdr; |
e039fa4a | 1159 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1160 | int tid; |
a622ab72 | 1161 | u8 *qc; |
e2ebc74d JB |
1162 | |
1163 | memset(tx, 0, sizeof(*tx)); | |
1164 | tx->skb = skb; | |
e2ebc74d | 1165 | tx->local = local; |
3b8d81e0 | 1166 | tx->sdata = sdata; |
252b86c4 | 1167 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1168 | |
cd8ffc80 JB |
1169 | /* |
1170 | * If this flag is set to true anywhere, and we get here, | |
1171 | * we are doing the needed processing, so remove the flag | |
1172 | * now. | |
1173 | */ | |
1174 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1175 | ||
58d4185e JB |
1176 | hdr = (struct ieee80211_hdr *) skb->data; |
1177 | ||
7c10770f JB |
1178 | if (likely(sta)) { |
1179 | if (!IS_ERR(sta)) | |
1180 | tx->sta = sta; | |
1181 | } else { | |
1182 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1183 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1184 | if (!tx->sta && sdata->wdev.use_4addr) | |
1185 | return TX_DROP; | |
1186 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1187 | IEEE80211_TX_CTL_INJECTED) || | |
1188 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1189 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1190 | } | |
1191 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1192 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1193 | } |
58d4185e | 1194 | |
cd8ffc80 | 1195 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1196 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
30686bf7 JB |
1197 | ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) && |
1198 | !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1199 | struct tid_ampdu_tx *tid_tx; |
1200 | ||
8b30b1fe S |
1201 | qc = ieee80211_get_qos_ctl(hdr); |
1202 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1203 | ||
a622ab72 JB |
1204 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1205 | if (tid_tx) { | |
1206 | bool queued; | |
cd8ffc80 | 1207 | |
a622ab72 JB |
1208 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1209 | tid_tx, tid); | |
1210 | ||
1211 | if (unlikely(queued)) | |
1212 | return TX_QUEUED; | |
1213 | } | |
8b30b1fe S |
1214 | } |
1215 | ||
badffb72 | 1216 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1217 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1218 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1219 | } else |
5cf121c3 | 1220 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1221 | |
a26eb27a JB |
1222 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1223 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1224 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1225 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1226 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1227 | } |
1228 | ||
e2ebc74d | 1229 | if (!tx->sta) |
e039fa4a | 1230 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 | 1231 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) { |
e039fa4a | 1232 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
f7418bc1 FF |
1233 | ieee80211_check_fast_xmit(tx->sta); |
1234 | } | |
58d4185e | 1235 | |
e039fa4a | 1236 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1237 | |
9ae54c84 | 1238 | return TX_CONTINUE; |
e2ebc74d JB |
1239 | } |
1240 | ||
80a83cfc MK |
1241 | static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local, |
1242 | struct ieee80211_vif *vif, | |
dbef5362 | 1243 | struct sta_info *sta, |
80a83cfc | 1244 | struct sk_buff *skb) |
ba8c3d6f FF |
1245 | { |
1246 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
ba8c3d6f | 1247 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
ba8c3d6f | 1248 | struct ieee80211_txq *txq = NULL; |
ba8c3d6f | 1249 | |
c3732a7b FF |
1250 | if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) || |
1251 | (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)) | |
80a83cfc | 1252 | return NULL; |
ba8c3d6f FF |
1253 | |
1254 | if (!ieee80211_is_data(hdr->frame_control)) | |
80a83cfc | 1255 | return NULL; |
ba8c3d6f | 1256 | |
dbef5362 | 1257 | if (sta) { |
ba8c3d6f FF |
1258 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; |
1259 | ||
dbef5362 MK |
1260 | if (!sta->uploaded) |
1261 | return NULL; | |
1262 | ||
1263 | txq = sta->sta.txq[tid]; | |
ba8c3d6f FF |
1264 | } else if (vif) { |
1265 | txq = vif->txq; | |
1266 | } | |
1267 | ||
1268 | if (!txq) | |
80a83cfc | 1269 | return NULL; |
ba8c3d6f | 1270 | |
80a83cfc MK |
1271 | return to_txq_info(txq); |
1272 | } | |
ba8c3d6f | 1273 | |
5caa328e MK |
1274 | static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb) |
1275 | { | |
1276 | IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time(); | |
1277 | } | |
1278 | ||
1279 | static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi) | |
1280 | { | |
1281 | IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif; | |
1282 | } | |
1283 | ||
1284 | static u32 codel_skb_len_func(const struct sk_buff *skb) | |
1285 | { | |
1286 | return skb->len; | |
1287 | } | |
1288 | ||
1289 | static codel_time_t codel_skb_time_func(const struct sk_buff *skb) | |
1290 | { | |
1291 | const struct ieee80211_tx_info *info; | |
1292 | ||
1293 | info = (const struct ieee80211_tx_info *)skb->cb; | |
1294 | return info->control.enqueue_time; | |
1295 | } | |
1296 | ||
1297 | static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars, | |
1298 | void *ctx) | |
1299 | { | |
1300 | struct ieee80211_local *local; | |
1301 | struct txq_info *txqi; | |
1302 | struct fq *fq; | |
1303 | struct fq_flow *flow; | |
1304 | ||
1305 | txqi = ctx; | |
1306 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1307 | fq = &local->fq; | |
1308 | ||
1309 | if (cvars == &txqi->def_cvars) | |
1310 | flow = &txqi->def_flow; | |
1311 | else | |
1312 | flow = &fq->flows[cvars - local->cvars]; | |
1313 | ||
1314 | return fq_flow_dequeue(fq, flow); | |
1315 | } | |
1316 | ||
1317 | static void codel_drop_func(struct sk_buff *skb, | |
1318 | void *ctx) | |
1319 | { | |
1320 | struct ieee80211_local *local; | |
1321 | struct ieee80211_hw *hw; | |
1322 | struct txq_info *txqi; | |
1323 | ||
1324 | txqi = ctx; | |
1325 | local = vif_to_sdata(txqi->txq.vif)->local; | |
1326 | hw = &local->hw; | |
1327 | ||
1328 | ieee80211_free_txskb(hw, skb); | |
1329 | } | |
1330 | ||
fa962b92 MK |
1331 | static struct sk_buff *fq_tin_dequeue_func(struct fq *fq, |
1332 | struct fq_tin *tin, | |
1333 | struct fq_flow *flow) | |
1334 | { | |
5caa328e MK |
1335 | struct ieee80211_local *local; |
1336 | struct txq_info *txqi; | |
1337 | struct codel_vars *cvars; | |
1338 | struct codel_params *cparams; | |
1339 | struct codel_stats *cstats; | |
1340 | ||
1341 | local = container_of(fq, struct ieee80211_local, fq); | |
1342 | txqi = container_of(tin, struct txq_info, tin); | |
1343 | cparams = &local->cparams; | |
8d51dbb8 | 1344 | cstats = &txqi->cstats; |
5caa328e MK |
1345 | |
1346 | if (flow == &txqi->def_flow) | |
1347 | cvars = &txqi->def_cvars; | |
1348 | else | |
1349 | cvars = &local->cvars[flow - fq->flows]; | |
1350 | ||
1351 | return codel_dequeue(txqi, | |
1352 | &flow->backlog, | |
1353 | cparams, | |
1354 | cvars, | |
1355 | cstats, | |
1356 | codel_skb_len_func, | |
1357 | codel_skb_time_func, | |
1358 | codel_drop_func, | |
1359 | codel_dequeue_func); | |
fa962b92 MK |
1360 | } |
1361 | ||
1362 | static void fq_skb_free_func(struct fq *fq, | |
1363 | struct fq_tin *tin, | |
1364 | struct fq_flow *flow, | |
1365 | struct sk_buff *skb) | |
1366 | { | |
1367 | struct ieee80211_local *local; | |
1368 | ||
1369 | local = container_of(fq, struct ieee80211_local, fq); | |
1370 | ieee80211_free_txskb(&local->hw, skb); | |
1371 | } | |
1372 | ||
1373 | static struct fq_flow *fq_flow_get_default_func(struct fq *fq, | |
1374 | struct fq_tin *tin, | |
1375 | int idx, | |
1376 | struct sk_buff *skb) | |
1377 | { | |
1378 | struct txq_info *txqi; | |
1379 | ||
1380 | txqi = container_of(tin, struct txq_info, tin); | |
1381 | return &txqi->def_flow; | |
1382 | } | |
1383 | ||
80a83cfc MK |
1384 | static void ieee80211_txq_enqueue(struct ieee80211_local *local, |
1385 | struct txq_info *txqi, | |
1386 | struct sk_buff *skb) | |
1387 | { | |
fa962b92 MK |
1388 | struct fq *fq = &local->fq; |
1389 | struct fq_tin *tin = &txqi->tin; | |
f2ac7e30 | 1390 | |
5caa328e | 1391 | ieee80211_set_skb_enqueue_time(skb); |
fa962b92 MK |
1392 | fq_tin_enqueue(fq, tin, skb, |
1393 | fq_skb_free_func, | |
1394 | fq_flow_get_default_func); | |
1395 | } | |
ba8c3d6f | 1396 | |
fa962b92 MK |
1397 | void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata, |
1398 | struct sta_info *sta, | |
1399 | struct txq_info *txqi, int tid) | |
1400 | { | |
1401 | fq_tin_init(&txqi->tin); | |
1402 | fq_flow_init(&txqi->def_flow); | |
5caa328e | 1403 | codel_vars_init(&txqi->def_cvars); |
8d51dbb8 | 1404 | codel_stats_init(&txqi->cstats); |
bb42f2d1 | 1405 | __skb_queue_head_init(&txqi->frags); |
fa962b92 MK |
1406 | |
1407 | txqi->txq.vif = &sdata->vif; | |
1408 | ||
1409 | if (sta) { | |
1410 | txqi->txq.sta = &sta->sta; | |
1411 | sta->sta.txq[tid] = &txqi->txq; | |
1412 | txqi->txq.tid = tid; | |
731977e9 | 1413 | txqi->txq.ac = ieee80211_ac_from_tid(tid); |
fa962b92 MK |
1414 | } else { |
1415 | sdata->vif.txq = &txqi->txq; | |
1416 | txqi->txq.tid = 0; | |
1417 | txqi->txq.ac = IEEE80211_AC_BE; | |
80a83cfc | 1418 | } |
fa962b92 | 1419 | } |
ba8c3d6f | 1420 | |
fa962b92 MK |
1421 | void ieee80211_txq_purge(struct ieee80211_local *local, |
1422 | struct txq_info *txqi) | |
1423 | { | |
1424 | struct fq *fq = &local->fq; | |
1425 | struct fq_tin *tin = &txqi->tin; | |
1426 | ||
1427 | fq_tin_reset(fq, tin, fq_skb_free_func); | |
bb42f2d1 | 1428 | ieee80211_purge_tx_queue(&local->hw, &txqi->frags); |
fa962b92 MK |
1429 | } |
1430 | ||
1431 | int ieee80211_txq_setup_flows(struct ieee80211_local *local) | |
1432 | { | |
1433 | struct fq *fq = &local->fq; | |
1434 | int ret; | |
5caa328e | 1435 | int i; |
3ff23cd5 THJ |
1436 | bool supp_vht = false; |
1437 | enum nl80211_band band; | |
fa962b92 MK |
1438 | |
1439 | if (!local->ops->wake_tx_queue) | |
1440 | return 0; | |
1441 | ||
1442 | ret = fq_init(fq, 4096); | |
1443 | if (ret) | |
1444 | return ret; | |
1445 | ||
3ff23cd5 THJ |
1446 | /* |
1447 | * If the hardware doesn't support VHT, it is safe to limit the maximum | |
1448 | * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n. | |
1449 | */ | |
1450 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
1451 | struct ieee80211_supported_band *sband; | |
1452 | ||
1453 | sband = local->hw.wiphy->bands[band]; | |
1454 | if (!sband) | |
1455 | continue; | |
1456 | ||
1457 | supp_vht = supp_vht || sband->vht_cap.vht_supported; | |
1458 | } | |
1459 | ||
1460 | if (!supp_vht) | |
1461 | fq->memory_limit = 4 << 20; /* 4 Mbytes */ | |
1462 | ||
5caa328e | 1463 | codel_params_init(&local->cparams); |
5caa328e MK |
1464 | local->cparams.interval = MS2TIME(100); |
1465 | local->cparams.target = MS2TIME(20); | |
1466 | local->cparams.ecn = true; | |
1467 | ||
1468 | local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]), | |
1469 | GFP_KERNEL); | |
1470 | if (!local->cvars) { | |
59a7c828 | 1471 | spin_lock_bh(&fq->lock); |
5caa328e | 1472 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1473 | spin_unlock_bh(&fq->lock); |
5caa328e MK |
1474 | return -ENOMEM; |
1475 | } | |
1476 | ||
1477 | for (i = 0; i < fq->flows_cnt; i++) | |
1478 | codel_vars_init(&local->cvars[i]); | |
1479 | ||
fa962b92 MK |
1480 | return 0; |
1481 | } | |
1482 | ||
1483 | void ieee80211_txq_teardown_flows(struct ieee80211_local *local) | |
1484 | { | |
1485 | struct fq *fq = &local->fq; | |
1486 | ||
1487 | if (!local->ops->wake_tx_queue) | |
1488 | return; | |
1489 | ||
5caa328e MK |
1490 | kfree(local->cvars); |
1491 | local->cvars = NULL; | |
1492 | ||
59a7c828 | 1493 | spin_lock_bh(&fq->lock); |
fa962b92 | 1494 | fq_reset(fq, fq_skb_free_func); |
59a7c828 | 1495 | spin_unlock_bh(&fq->lock); |
ba8c3d6f FF |
1496 | } |
1497 | ||
bb42f2d1 THJ |
1498 | static bool ieee80211_queue_skb(struct ieee80211_local *local, |
1499 | struct ieee80211_sub_if_data *sdata, | |
1500 | struct sta_info *sta, | |
1501 | struct sk_buff *skb) | |
1502 | { | |
bb42f2d1 THJ |
1503 | struct fq *fq = &local->fq; |
1504 | struct ieee80211_vif *vif; | |
1505 | struct txq_info *txqi; | |
bb42f2d1 THJ |
1506 | |
1507 | if (!local->ops->wake_tx_queue || | |
1508 | sdata->vif.type == NL80211_IFTYPE_MONITOR) | |
1509 | return false; | |
1510 | ||
bb42f2d1 THJ |
1511 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
1512 | sdata = container_of(sdata->bss, | |
1513 | struct ieee80211_sub_if_data, u.ap); | |
1514 | ||
1515 | vif = &sdata->vif; | |
dbef5362 | 1516 | txqi = ieee80211_get_txq(local, vif, sta, skb); |
bb42f2d1 THJ |
1517 | |
1518 | if (!txqi) | |
1519 | return false; | |
1520 | ||
bb42f2d1 THJ |
1521 | spin_lock_bh(&fq->lock); |
1522 | ieee80211_txq_enqueue(local, txqi, skb); | |
1523 | spin_unlock_bh(&fq->lock); | |
1524 | ||
1525 | drv_wake_tx_queue(local, txqi); | |
1526 | ||
1527 | return true; | |
1528 | } | |
1529 | ||
11127e91 JB |
1530 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1531 | struct ieee80211_vif *vif, | |
1532 | struct ieee80211_sta *sta, | |
1533 | struct sk_buff_head *skbs, | |
1534 | bool txpending) | |
e2ebc74d | 1535 | { |
80a83cfc | 1536 | struct ieee80211_tx_control control = {}; |
252b86c4 | 1537 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1538 | unsigned long flags; |
e2ebc74d | 1539 | |
252b86c4 | 1540 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1541 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1542 | int q = info->hw_queue; | |
1543 | ||
1544 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1545 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1546 | __skb_unlink(skb, skbs); | |
c3e7724b | 1547 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1548 | continue; |
1549 | } | |
1550 | #endif | |
3b8d81e0 JB |
1551 | |
1552 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1553 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1554 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1555 | if (unlikely(info->flags & |
a7679ed5 SF |
1556 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1557 | if (local->queue_stop_reasons[q] & | |
1558 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1559 | /* | |
1560 | * Drop off-channel frames if queues | |
1561 | * are stopped for any reason other | |
1562 | * than off-channel operation. Never | |
1563 | * queue them. | |
1564 | */ | |
1565 | spin_unlock_irqrestore( | |
1566 | &local->queue_stop_reason_lock, | |
1567 | flags); | |
1568 | ieee80211_purge_tx_queue(&local->hw, | |
1569 | skbs); | |
1570 | return true; | |
1571 | } | |
1572 | } else { | |
1573 | ||
6c17b77b | 1574 | /* |
a7679ed5 SF |
1575 | * Since queue is stopped, queue up frames for |
1576 | * later transmission from the tx-pending | |
1577 | * tasklet when the queue is woken again. | |
6c17b77b | 1578 | */ |
a7679ed5 SF |
1579 | if (txpending) |
1580 | skb_queue_splice_init(skbs, | |
1581 | &local->pending[q]); | |
1582 | else | |
1583 | skb_queue_splice_tail_init(skbs, | |
1584 | &local->pending[q]); | |
1585 | ||
1586 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1587 | flags); | |
1588 | return false; | |
6c17b77b | 1589 | } |
7bb45683 | 1590 | } |
3b8d81e0 | 1591 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1592 | |
11127e91 | 1593 | info->control.vif = vif; |
80a83cfc | 1594 | control.sta = sta; |
f0e72851 | 1595 | |
11127e91 | 1596 | __skb_unlink(skb, skbs); |
80a83cfc | 1597 | drv_tx(local, &control, skb); |
11127e91 | 1598 | } |
5061b0c2 | 1599 | |
11127e91 JB |
1600 | return true; |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1605 | */ | |
1606 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1607 | struct sk_buff_head *skbs, int led_len, | |
1608 | struct sta_info *sta, bool txpending) | |
1609 | { | |
1610 | struct ieee80211_tx_info *info; | |
1611 | struct ieee80211_sub_if_data *sdata; | |
1612 | struct ieee80211_vif *vif; | |
1613 | struct ieee80211_sta *pubsta; | |
1614 | struct sk_buff *skb; | |
1615 | bool result = true; | |
1616 | __le16 fc; | |
5061b0c2 | 1617 | |
11127e91 JB |
1618 | if (WARN_ON(skb_queue_empty(skbs))) |
1619 | return true; | |
ec25acc4 | 1620 | |
11127e91 JB |
1621 | skb = skb_peek(skbs); |
1622 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1623 | info = IEEE80211_SKB_CB(skb); | |
1624 | sdata = vif_to_sdata(info->control.vif); | |
1625 | if (sta && !sta->uploaded) | |
1626 | sta = NULL; | |
1627 | ||
1628 | if (sta) | |
1629 | pubsta = &sta->sta; | |
1630 | else | |
1631 | pubsta = NULL; | |
1632 | ||
1633 | switch (sdata->vif.type) { | |
1634 | case NL80211_IFTYPE_MONITOR: | |
d8212184 | 1635 | if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) { |
c82b5a74 JB |
1636 | vif = &sdata->vif; |
1637 | break; | |
1638 | } | |
4b6f1dd6 | 1639 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1640 | if (sdata) { |
4b6f1dd6 | 1641 | vif = &sdata->vif; |
3a25a8c8 JB |
1642 | info->hw_queue = |
1643 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
30686bf7 | 1644 | } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { |
63b4d8b3 | 1645 | ieee80211_purge_tx_queue(&local->hw, skbs); |
3a25a8c8 JB |
1646 | return true; |
1647 | } else | |
4b6f1dd6 | 1648 | vif = NULL; |
11127e91 JB |
1649 | break; |
1650 | case NL80211_IFTYPE_AP_VLAN: | |
1651 | sdata = container_of(sdata->bss, | |
1652 | struct ieee80211_sub_if_data, u.ap); | |
1653 | /* fall through */ | |
1654 | default: | |
1655 | vif = &sdata->vif; | |
1656 | break; | |
e2ebc74d | 1657 | } |
2de8e0d9 | 1658 | |
cb831b53 JB |
1659 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1660 | txpending); | |
11127e91 | 1661 | |
74e4dbfd | 1662 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1663 | |
4db4e0a1 | 1664 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1665 | |
11127e91 | 1666 | return result; |
e2ebc74d JB |
1667 | } |
1668 | ||
97b045d6 JB |
1669 | /* |
1670 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1671 | * frame was dropped or queued. | |
bb42f2d1 THJ |
1672 | * |
1673 | * The handlers are split into an early and late part. The latter is everything | |
1674 | * that can be sensitive to reordering, and will be deferred to after packets | |
1675 | * are dequeued from the intermediate queues (when they are enabled). | |
97b045d6 | 1676 | */ |
bb42f2d1 | 1677 | static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx) |
97b045d6 | 1678 | { |
97b045d6 | 1679 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1680 | |
9aa4aee3 JB |
1681 | #define CALL_TXH(txh) \ |
1682 | do { \ | |
1683 | res = txh(tx); \ | |
1684 | if (res != TX_CONTINUE) \ | |
1685 | goto txh_done; \ | |
1686 | } while (0) | |
1687 | ||
5c1b98a5 | 1688 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1689 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1690 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1691 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1692 | CALL_TXH(ieee80211_tx_h_select_key); |
30686bf7 | 1693 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
af65cd96 | 1694 | CALL_TXH(ieee80211_tx_h_rate_ctrl); |
c6fcf6bc | 1695 | |
bb42f2d1 THJ |
1696 | txh_done: |
1697 | if (unlikely(res == TX_DROP)) { | |
1698 | I802_DEBUG_INC(tx->local->tx_handlers_drop); | |
1699 | if (tx->skb) | |
1700 | ieee80211_free_txskb(&tx->local->hw, tx->skb); | |
1701 | else | |
1702 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); | |
1703 | return -1; | |
1704 | } else if (unlikely(res == TX_QUEUED)) { | |
1705 | I802_DEBUG_INC(tx->local->tx_handlers_queued); | |
1706 | return -1; | |
1707 | } | |
1708 | ||
1709 | return 0; | |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Late handlers can be called while the sta lock is held. Handlers that can | |
1714 | * cause packets to be generated will cause deadlock! | |
1715 | */ | |
1716 | static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx) | |
1717 | { | |
1718 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
1719 | ieee80211_tx_result res = TX_CONTINUE; | |
1720 | ||
aa5b5492 JB |
1721 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1722 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1723 | tx->skb = NULL; | |
c6fcf6bc | 1724 | goto txh_done; |
aa5b5492 | 1725 | } |
c6fcf6bc JB |
1726 | |
1727 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1728 | CALL_TXH(ieee80211_tx_h_sequence); |
1729 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1730 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1731 | CALL_TXH(ieee80211_tx_h_stats); |
1732 | CALL_TXH(ieee80211_tx_h_encrypt); | |
30686bf7 | 1733 | if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL)) |
8fd369ee | 1734 | CALL_TXH(ieee80211_tx_h_calculate_duration); |
d9e8a70f | 1735 | #undef CALL_TXH |
97b045d6 | 1736 | |
d9e8a70f | 1737 | txh_done: |
97b045d6 | 1738 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1739 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1740 | if (tx->skb) |
c3e7724b | 1741 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1742 | else |
1f98ab7f | 1743 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1744 | return -1; |
1745 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1746 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1747 | return -1; |
1748 | } | |
1749 | ||
1750 | return 0; | |
1751 | } | |
1752 | ||
bb42f2d1 THJ |
1753 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) |
1754 | { | |
1755 | int r = invoke_tx_handlers_early(tx); | |
1756 | ||
1757 | if (r) | |
1758 | return r; | |
1759 | return invoke_tx_handlers_late(tx); | |
1760 | } | |
1761 | ||
06be6b14 FF |
1762 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1763 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1764 | int band, struct ieee80211_sta **sta) | |
1765 | { | |
1766 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1767 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1768 | struct ieee80211_tx_data tx; | |
88724a81 | 1769 | struct sk_buff *skb2; |
06be6b14 | 1770 | |
7c10770f | 1771 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1772 | return false; |
1773 | ||
1774 | info->band = band; | |
1775 | info->control.vif = vif; | |
1776 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1777 | ||
1778 | if (invoke_tx_handlers(&tx)) | |
1779 | return false; | |
1780 | ||
1781 | if (sta) { | |
1782 | if (tx.sta) | |
1783 | *sta = &tx.sta->sta; | |
1784 | else | |
1785 | *sta = NULL; | |
1786 | } | |
1787 | ||
88724a81 JB |
1788 | /* this function isn't suitable for fragmented data frames */ |
1789 | skb2 = __skb_dequeue(&tx.skbs); | |
1790 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1791 | ieee80211_free_txskb(hw, skb2); | |
1792 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1793 | return false; | |
1794 | } | |
1795 | ||
06be6b14 FF |
1796 | return true; |
1797 | } | |
1798 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1799 | ||
7bb45683 JB |
1800 | /* |
1801 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1802 | */ | |
1803 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f JB |
1804 | struct sta_info *sta, struct sk_buff *skb, |
1805 | bool txpending) | |
e2ebc74d | 1806 | { |
3b8d81e0 | 1807 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1808 | struct ieee80211_tx_data tx; |
97b045d6 | 1809 | ieee80211_tx_result res_prepare; |
e039fa4a | 1810 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1811 | bool result = true; |
74e4dbfd | 1812 | int led_len; |
e2ebc74d | 1813 | |
e2ebc74d JB |
1814 | if (unlikely(skb->len < 10)) { |
1815 | dev_kfree_skb(skb); | |
7bb45683 | 1816 | return true; |
e2ebc74d JB |
1817 | } |
1818 | ||
58d4185e | 1819 | /* initialises tx */ |
74e4dbfd | 1820 | led_len = skb->len; |
7c10770f | 1821 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1822 | |
cd8ffc80 | 1823 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1824 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1825 | return true; |
cd8ffc80 | 1826 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1827 | return true; |
e2ebc74d JB |
1828 | } |
1829 | ||
3a25a8c8 JB |
1830 | /* set up hw_queue value early */ |
1831 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
30686bf7 | 1832 | !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) |
3a25a8c8 JB |
1833 | info->hw_queue = |
1834 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1835 | ||
bb42f2d1 THJ |
1836 | if (invoke_tx_handlers_early(&tx)) |
1837 | return false; | |
1838 | ||
1839 | if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb)) | |
1840 | return true; | |
1841 | ||
1842 | if (!invoke_tx_handlers_late(&tx)) | |
74e4dbfd JB |
1843 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1844 | tx.sta, txpending); | |
55de908a | 1845 | |
7bb45683 | 1846 | return result; |
e2ebc74d JB |
1847 | } |
1848 | ||
1849 | /* device xmit handlers */ | |
1850 | ||
3bff1865 | 1851 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1852 | struct sk_buff *skb, |
1853 | int head_need, bool may_encrypt) | |
1854 | { | |
3bff1865 | 1855 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1856 | int tail_need = 0; |
1857 | ||
3bff1865 | 1858 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1859 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1860 | tail_need -= skb_tailroom(skb); | |
1861 | tail_need = max_t(int, tail_need, 0); | |
1862 | } | |
1863 | ||
c70f59a2 | 1864 | if (skb_cloned(skb) && |
30686bf7 | 1865 | (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) || |
c70f59a2 | 1866 | !skb_clone_writable(skb, ETH_HLEN) || |
17c18bf8 | 1867 | (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt))) |
23c0752a | 1868 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1869 | else if (head_need || tail_need) |
23c0752a | 1870 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1871 | else |
1872 | return 0; | |
23c0752a JB |
1873 | |
1874 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1875 | wiphy_debug(local->hw.wiphy, |
1876 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1877 | return -ENOMEM; |
1878 | } | |
1879 | ||
23c0752a JB |
1880 | return 0; |
1881 | } | |
1882 | ||
7c10770f JB |
1883 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1884 | struct sta_info *sta, struct sk_buff *skb) | |
e2ebc74d | 1885 | { |
3b8d81e0 | 1886 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1887 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1888 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1889 | int headroom; |
23c0752a | 1890 | bool may_encrypt; |
e2ebc74d | 1891 | |
3b8d81e0 | 1892 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1893 | |
3b8d81e0 | 1894 | headroom = local->tx_headroom; |
23c0752a | 1895 | if (may_encrypt) |
2475b1cc | 1896 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1897 | headroom -= skb_headroom(skb); |
1898 | headroom = max_t(int, 0, headroom); | |
1899 | ||
3bff1865 | 1900 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1901 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1902 | return; |
e2ebc74d JB |
1903 | } |
1904 | ||
740c1aa3 | 1905 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1906 | info->control.vif = &sdata->vif; |
e2ebc74d | 1907 | |
3f52b7e3 MP |
1908 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1909 | if (ieee80211_is_data(hdr->frame_control) && | |
1910 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1911 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1912 | return; /* skb queued: don't free */ |
1913 | } else { | |
1914 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1915 | } | |
98aed9fd | 1916 | } |
cca89496 | 1917 | |
2154c81c | 1918 | ieee80211_set_qos_hdr(sdata, skb); |
7c10770f | 1919 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
1920 | } |
1921 | ||
dfdfc2be SE |
1922 | static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local, |
1923 | struct sk_buff *skb) | |
73b9f03a JB |
1924 | { |
1925 | struct ieee80211_radiotap_iterator iterator; | |
1926 | struct ieee80211_radiotap_header *rthdr = | |
1927 | (struct ieee80211_radiotap_header *) skb->data; | |
1928 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
dfdfc2be SE |
1929 | struct ieee80211_supported_band *sband = |
1930 | local->hw.wiphy->bands[info->band]; | |
73b9f03a JB |
1931 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, |
1932 | NULL); | |
1933 | u16 txflags; | |
dfdfc2be SE |
1934 | u16 rate = 0; |
1935 | bool rate_found = false; | |
1936 | u8 rate_retries = 0; | |
1937 | u16 rate_flags = 0; | |
f66b60f6 | 1938 | u8 mcs_known, mcs_flags, mcs_bw; |
646e76bb LB |
1939 | u16 vht_known; |
1940 | u8 vht_mcs = 0, vht_nss = 0; | |
dfdfc2be | 1941 | int i; |
73b9f03a JB |
1942 | |
1943 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1944 | IEEE80211_TX_CTL_DONTFRAG; | |
1945 | ||
1946 | /* | |
1947 | * for every radiotap entry that is present | |
1948 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1949 | * entries present, or -EINVAL on error) | |
1950 | */ | |
1951 | ||
1952 | while (!ret) { | |
1953 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1954 | ||
1955 | if (ret) | |
1956 | continue; | |
1957 | ||
1958 | /* see if this argument is something we can use */ | |
1959 | switch (iterator.this_arg_index) { | |
1960 | /* | |
1961 | * You must take care when dereferencing iterator.this_arg | |
1962 | * for multibyte types... the pointer is not aligned. Use | |
1963 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1964 | * iterator.this_arg for type "type" safely on all arches. | |
1965 | */ | |
1966 | case IEEE80211_RADIOTAP_FLAGS: | |
1967 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1968 | /* | |
1969 | * this indicates that the skb we have been | |
1970 | * handed has the 32-bit FCS CRC at the end... | |
1971 | * we should react to that by snipping it off | |
1972 | * because it will be recomputed and added | |
1973 | * on transmission | |
1974 | */ | |
1975 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1976 | return false; | |
1977 | ||
1978 | skb_trim(skb, skb->len - FCS_LEN); | |
1979 | } | |
1980 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1981 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1982 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1983 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1984 | break; | |
1985 | ||
1986 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1987 | txflags = get_unaligned_le16(iterator.this_arg); | |
1988 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1989 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1990 | break; | |
1991 | ||
dfdfc2be SE |
1992 | case IEEE80211_RADIOTAP_RATE: |
1993 | rate = *iterator.this_arg; | |
1994 | rate_flags = 0; | |
1995 | rate_found = true; | |
1996 | break; | |
1997 | ||
1998 | case IEEE80211_RADIOTAP_DATA_RETRIES: | |
1999 | rate_retries = *iterator.this_arg; | |
2000 | break; | |
2001 | ||
2002 | case IEEE80211_RADIOTAP_MCS: | |
2003 | mcs_known = iterator.this_arg[0]; | |
2004 | mcs_flags = iterator.this_arg[1]; | |
2005 | if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS)) | |
2006 | break; | |
2007 | ||
2008 | rate_found = true; | |
2009 | rate = iterator.this_arg[2]; | |
2010 | rate_flags = IEEE80211_TX_RC_MCS; | |
2011 | ||
2012 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI && | |
2013 | mcs_flags & IEEE80211_RADIOTAP_MCS_SGI) | |
2014 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2015 | ||
f66b60f6 | 2016 | mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK; |
dfdfc2be | 2017 | if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW && |
f66b60f6 | 2018 | mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40) |
dfdfc2be SE |
2019 | rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; |
2020 | break; | |
2021 | ||
646e76bb LB |
2022 | case IEEE80211_RADIOTAP_VHT: |
2023 | vht_known = get_unaligned_le16(iterator.this_arg); | |
2024 | rate_found = true; | |
2025 | ||
2026 | rate_flags = IEEE80211_TX_RC_VHT_MCS; | |
2027 | if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) && | |
2028 | (iterator.this_arg[2] & | |
2029 | IEEE80211_RADIOTAP_VHT_FLAG_SGI)) | |
2030 | rate_flags |= IEEE80211_TX_RC_SHORT_GI; | |
2031 | if (vht_known & | |
2032 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) { | |
2033 | if (iterator.this_arg[3] == 1) | |
2034 | rate_flags |= | |
2035 | IEEE80211_TX_RC_40_MHZ_WIDTH; | |
2036 | else if (iterator.this_arg[3] == 4) | |
2037 | rate_flags |= | |
2038 | IEEE80211_TX_RC_80_MHZ_WIDTH; | |
2039 | else if (iterator.this_arg[3] == 11) | |
2040 | rate_flags |= | |
2041 | IEEE80211_TX_RC_160_MHZ_WIDTH; | |
2042 | } | |
2043 | ||
2044 | vht_mcs = iterator.this_arg[4] >> 4; | |
2045 | vht_nss = iterator.this_arg[4] & 0xF; | |
2046 | break; | |
2047 | ||
73b9f03a JB |
2048 | /* |
2049 | * Please update the file | |
2050 | * Documentation/networking/mac80211-injection.txt | |
2051 | * when parsing new fields here. | |
2052 | */ | |
2053 | ||
2054 | default: | |
2055 | break; | |
2056 | } | |
2057 | } | |
2058 | ||
2059 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
2060 | return false; | |
2061 | ||
dfdfc2be SE |
2062 | if (rate_found) { |
2063 | info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT; | |
2064 | ||
2065 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { | |
2066 | info->control.rates[i].idx = -1; | |
2067 | info->control.rates[i].flags = 0; | |
2068 | info->control.rates[i].count = 0; | |
2069 | } | |
2070 | ||
2071 | if (rate_flags & IEEE80211_TX_RC_MCS) { | |
2072 | info->control.rates[0].idx = rate; | |
646e76bb LB |
2073 | } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) { |
2074 | ieee80211_rate_set_vht(info->control.rates, vht_mcs, | |
2075 | vht_nss); | |
dfdfc2be SE |
2076 | } else { |
2077 | for (i = 0; i < sband->n_bitrates; i++) { | |
2078 | if (rate * 5 != sband->bitrates[i].bitrate) | |
2079 | continue; | |
2080 | ||
2081 | info->control.rates[0].idx = i; | |
2082 | break; | |
2083 | } | |
2084 | } | |
2085 | ||
07310a63 FF |
2086 | if (info->control.rates[0].idx < 0) |
2087 | info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT; | |
2088 | ||
dfdfc2be SE |
2089 | info->control.rates[0].flags = rate_flags; |
2090 | info->control.rates[0].count = min_t(u8, rate_retries + 1, | |
2091 | local->hw.max_rate_tries); | |
2092 | } | |
2093 | ||
73b9f03a JB |
2094 | /* |
2095 | * remove the radiotap header | |
2096 | * iterator->_max_length was sanity-checked against | |
2097 | * skb->len by iterator init | |
2098 | */ | |
2099 | skb_pull(skb, iterator._max_length); | |
2100 | ||
2101 | return true; | |
2102 | } | |
2103 | ||
d0cf9c0d SH |
2104 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
2105 | struct net_device *dev) | |
e2ebc74d JB |
2106 | { |
2107 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 2108 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
2109 | struct ieee80211_radiotap_header *prthdr = |
2110 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 2111 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 2112 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 2113 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 2114 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 2115 | u16 len_rthdr; |
5d9cf4a5 | 2116 | int hdrlen; |
e2ebc74d | 2117 | |
9b8a74e3 AG |
2118 | /* check for not even having the fixed radiotap header part */ |
2119 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
2120 | goto fail; /* too short to be possibly valid */ | |
2121 | ||
2122 | /* is it a header version we can trust to find length from? */ | |
2123 | if (unlikely(prthdr->it_version)) | |
2124 | goto fail; /* only version 0 is supported */ | |
2125 | ||
2126 | /* then there must be a radiotap header with a length we can use */ | |
2127 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
2128 | ||
2129 | /* does the skb contain enough to deliver on the alleged length? */ | |
2130 | if (unlikely(skb->len < len_rthdr)) | |
2131 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 2132 | |
e2ebc74d JB |
2133 | /* |
2134 | * fix up the pointers accounting for the radiotap | |
2135 | * header still being in there. We are being given | |
2136 | * a precooked IEEE80211 header so no need for | |
2137 | * normal processing | |
2138 | */ | |
9b8a74e3 | 2139 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 2140 | /* |
9b8a74e3 AG |
2141 | * these are just fixed to the end of the rt area since we |
2142 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 2143 | */ |
9b8a74e3 AG |
2144 | skb_set_network_header(skb, len_rthdr); |
2145 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 2146 | |
5d9cf4a5 JB |
2147 | if (skb->len < len_rthdr + 2) |
2148 | goto fail; | |
2149 | ||
2150 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
2151 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
2152 | ||
2153 | if (skb->len < len_rthdr + hdrlen) | |
2154 | goto fail; | |
2155 | ||
f75f5c6f HS |
2156 | /* |
2157 | * Initialize skb->protocol if the injected frame is a data frame | |
2158 | * carrying a rfc1042 header | |
2159 | */ | |
5d9cf4a5 JB |
2160 | if (ieee80211_is_data(hdr->frame_control) && |
2161 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
2162 | u8 *payload = (u8 *)hdr + hdrlen; | |
2163 | ||
b203ca39 | 2164 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
2165 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
2166 | payload[7]); | |
f75f5c6f HS |
2167 | } |
2168 | ||
3b8d81e0 JB |
2169 | memset(info, 0, sizeof(*info)); |
2170 | ||
5d9cf4a5 | 2171 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
2172 | IEEE80211_TX_CTL_INJECTED; |
2173 | ||
5d9cf4a5 JB |
2174 | rcu_read_lock(); |
2175 | ||
2176 | /* | |
2177 | * We process outgoing injected frames that have a local address | |
2178 | * we handle as though they are non-injected frames. | |
2179 | * This code here isn't entirely correct, the local MAC address | |
2180 | * isn't always enough to find the interface to use; for proper | |
2181 | * VLAN/WDS support we will need a different mechanism (which | |
2182 | * likely isn't going to be monitor interfaces). | |
2183 | */ | |
2184 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2185 | ||
2186 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
2187 | if (!ieee80211_sdata_running(tmp_sdata)) | |
2188 | continue; | |
2189 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
2190 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
2191 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
2192 | continue; | |
b203ca39 | 2193 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
2194 | sdata = tmp_sdata; |
2195 | break; | |
2196 | } | |
2197 | } | |
7351c6bd | 2198 | |
55de908a JB |
2199 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2200 | if (!chanctx_conf) { | |
2201 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
2202 | if (tmp_sdata) | |
2203 | chanctx_conf = | |
2204 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
2205 | } | |
55de908a | 2206 | |
b4a7ff75 | 2207 | if (chanctx_conf) |
b4932836 | 2208 | chandef = &chanctx_conf->def; |
b4a7ff75 | 2209 | else if (!local->use_chanctx) |
b4932836 | 2210 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
2211 | else |
2212 | goto fail_rcu; | |
55de908a JB |
2213 | |
2214 | /* | |
2215 | * Frame injection is not allowed if beaconing is not allowed | |
2216 | * or if we need radar detection. Beaconing is usually not allowed when | |
2217 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
2218 | * Passive scan is also used in world regulatory domains where | |
2219 | * your country is not known and as such it should be treated as | |
2220 | * NO TX unless the channel is explicitly allowed in which case | |
2221 | * your current regulatory domain would not have the passive scan | |
2222 | * flag. | |
2223 | * | |
2224 | * Since AP mode uses monitor interfaces to inject/TX management | |
2225 | * frames we can make AP mode the exception to this rule once it | |
2226 | * supports radar detection as its implementation can deal with | |
2227 | * radar detection by itself. We can do that later by adding a | |
2228 | * monitor flag interfaces used for AP support. | |
2229 | */ | |
b4932836 JD |
2230 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
2231 | sdata->vif.type)) | |
55de908a JB |
2232 | goto fail_rcu; |
2233 | ||
73c4e195 | 2234 | info->band = chandef->chan->band; |
109843b0 LB |
2235 | |
2236 | /* process and remove the injection radiotap header */ | |
2237 | if (!ieee80211_parse_tx_radiotap(local, skb)) | |
2238 | goto fail_rcu; | |
2239 | ||
7c10770f | 2240 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
2241 | rcu_read_unlock(); |
2242 | ||
e2ebc74d | 2243 | return NETDEV_TX_OK; |
9b8a74e3 | 2244 | |
55de908a JB |
2245 | fail_rcu: |
2246 | rcu_read_unlock(); | |
9b8a74e3 AG |
2247 | fail: |
2248 | dev_kfree_skb(skb); | |
2249 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
2250 | } |
2251 | ||
97ffe757 | 2252 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 2253 | { |
97ffe757 | 2254 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 2255 | |
97ffe757 JB |
2256 | return ethertype == ETH_P_TDLS && |
2257 | skb->len > 14 && | |
2258 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
2259 | } | |
2260 | ||
2261 | static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, | |
2262 | struct sk_buff *skb, | |
2263 | struct sta_info **sta_out) | |
2264 | { | |
2265 | struct sta_info *sta; | |
2266 | ||
2267 | switch (sdata->vif.type) { | |
2268 | case NL80211_IFTYPE_AP_VLAN: | |
2269 | sta = rcu_dereference(sdata->u.vlan.sta); | |
2270 | if (sta) { | |
2271 | *sta_out = sta; | |
2272 | return 0; | |
2273 | } else if (sdata->wdev.use_4addr) { | |
2274 | return -ENOLINK; | |
2275 | } | |
2276 | /* fall through */ | |
2277 | case NL80211_IFTYPE_AP: | |
2278 | case NL80211_IFTYPE_OCB: | |
2279 | case NL80211_IFTYPE_ADHOC: | |
2280 | if (is_multicast_ether_addr(skb->data)) { | |
2281 | *sta_out = ERR_PTR(-ENOENT); | |
2282 | return 0; | |
2283 | } | |
2284 | sta = sta_info_get_bss(sdata, skb->data); | |
2285 | break; | |
2286 | case NL80211_IFTYPE_WDS: | |
2287 | sta = sta_info_get(sdata, sdata->u.wds.remote_addr); | |
2288 | break; | |
2289 | #ifdef CONFIG_MAC80211_MESH | |
2290 | case NL80211_IFTYPE_MESH_POINT: | |
2291 | /* determined much later */ | |
2292 | *sta_out = NULL; | |
2293 | return 0; | |
2294 | #endif | |
2295 | case NL80211_IFTYPE_STATION: | |
2296 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
2297 | sta = sta_info_get(sdata, skb->data); | |
11d62caf JB |
2298 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { |
2299 | if (test_sta_flag(sta, | |
2300 | WLAN_STA_TDLS_PEER_AUTH)) { | |
97ffe757 JB |
2301 | *sta_out = sta; |
2302 | return 0; | |
2303 | } | |
2304 | ||
2305 | /* | |
2306 | * TDLS link during setup - throw out frames to | |
2307 | * peer. Allow TDLS-setup frames to unauthorized | |
2308 | * peers for the special case of a link teardown | |
2309 | * after a TDLS sta is removed due to being | |
2310 | * unreachable. | |
2311 | */ | |
11d62caf | 2312 | if (!ieee80211_is_tdls_setup(skb)) |
97ffe757 JB |
2313 | return -EINVAL; |
2314 | } | |
2315 | ||
2316 | } | |
2317 | ||
2318 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
2319 | if (!sta) | |
2320 | return -ENOLINK; | |
2321 | break; | |
2322 | default: | |
2323 | return -EINVAL; | |
2324 | } | |
2325 | ||
2326 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
2327 | return 0; | |
ad38bfc9 MG |
2328 | } |
2329 | ||
e2ebc74d | 2330 | /** |
4c9451ed JB |
2331 | * ieee80211_build_hdr - build 802.11 header in the given frame |
2332 | * @sdata: virtual interface to build the header for | |
2333 | * @skb: the skb to build the header in | |
24d342c5 | 2334 | * @info_flags: skb flags to set |
e2ebc74d | 2335 | * |
4c9451ed JB |
2336 | * This function takes the skb with 802.3 header and reformats the header to |
2337 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
2338 | * being transmitted on. | |
2339 | * | |
2340 | * Note that this function also takes care of the TX status request and | |
2341 | * potential unsharing of the SKB - this needs to be interleaved with the | |
2342 | * header building. | |
e2ebc74d | 2343 | * |
4c9451ed JB |
2344 | * The function requires the read-side RCU lock held |
2345 | * | |
2346 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 2347 | */ |
4c9451ed | 2348 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 2349 | struct sk_buff *skb, u32 info_flags, |
97ffe757 | 2350 | struct sta_info *sta) |
e2ebc74d | 2351 | { |
133b8226 | 2352 | struct ieee80211_local *local = sdata->local; |
489ee919 | 2353 | struct ieee80211_tx_info *info; |
dcf33963 | 2354 | int head_need; |
065e9605 HH |
2355 | u16 ethertype, hdrlen, meshhdrlen = 0; |
2356 | __le16 fc; | |
e2ebc74d | 2357 | struct ieee80211_hdr hdr; |
ff67bb86 | 2358 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 2359 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
2360 | const u8 *encaps_data; |
2361 | int encaps_len, skip_header_bytes; | |
97ffe757 JB |
2362 | bool wme_sta = false, authorized = false; |
2363 | bool tdls_peer; | |
a729cff8 | 2364 | bool multicast; |
a729cff8 | 2365 | u16 info_id = 0; |
55de908a JB |
2366 | struct ieee80211_chanctx_conf *chanctx_conf; |
2367 | struct ieee80211_sub_if_data *ap_sdata; | |
57fbcce3 | 2368 | enum nl80211_band band; |
4c9451ed | 2369 | int ret; |
e2ebc74d | 2370 | |
97ffe757 JB |
2371 | if (IS_ERR(sta)) |
2372 | sta = NULL; | |
2373 | ||
e2ebc74d JB |
2374 | /* convert Ethernet header to proper 802.11 header (based on |
2375 | * operation mode) */ | |
2376 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 2377 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 2378 | |
51fb61e7 | 2379 | switch (sdata->vif.type) { |
05c914fe | 2380 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 2381 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
2382 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
2383 | /* RA TA DA SA */ | |
2384 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 2385 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2386 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2387 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2388 | hdrlen = 30; | |
c2c98fde | 2389 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 2390 | wme_sta = sta->sta.wme; |
f14543ee | 2391 | } |
55de908a JB |
2392 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
2393 | u.ap); | |
2394 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
2395 | if (!chanctx_conf) { |
2396 | ret = -ENOTCONN; | |
2397 | goto free; | |
2398 | } | |
4bf88530 | 2399 | band = chanctx_conf->def.chan->band; |
97ffe757 | 2400 | if (sdata->wdev.use_4addr) |
f14543ee FF |
2401 | break; |
2402 | /* fall through */ | |
2403 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
2404 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
2405 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2406 | if (!chanctx_conf) { |
2407 | ret = -ENOTCONN; | |
2408 | goto free; | |
2409 | } | |
065e9605 | 2410 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
2411 | /* DA BSSID SA */ |
2412 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 2413 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2414 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
2415 | hdrlen = 24; | |
4bf88530 | 2416 | band = chanctx_conf->def.chan->band; |
cf966838 | 2417 | break; |
05c914fe | 2418 | case NL80211_IFTYPE_WDS: |
065e9605 | 2419 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
2420 | /* RA TA DA SA */ |
2421 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 2422 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2423 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2424 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2425 | hdrlen = 30; | |
55de908a JB |
2426 | /* |
2427 | * This is the exception! WDS style interfaces are prohibited | |
2428 | * when channel contexts are in used so this must be valid | |
2429 | */ | |
675a0b04 | 2430 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 2431 | break; |
33b64eb2 | 2432 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 2433 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 2434 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
2435 | struct sta_info *next_hop; |
2436 | bool mpp_lookup = true; | |
2437 | ||
bf7cd94d | 2438 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
2439 | if (mpath) { |
2440 | mpp_lookup = false; | |
2441 | next_hop = rcu_dereference(mpath->next_hop); | |
2442 | if (!next_hop || | |
2443 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
2444 | MESH_PATH_RESOLVING))) | |
2445 | mpp_lookup = true; | |
2446 | } | |
2447 | ||
ab1c7906 | 2448 | if (mpp_lookup) { |
bf7cd94d | 2449 | mppath = mpp_path_lookup(sdata, skb->data); |
ab1c7906 HR |
2450 | if (mppath) |
2451 | mppath->exp_time = jiffies; | |
2452 | } | |
163df6cf CYY |
2453 | |
2454 | if (mppath && mpath) | |
2bdaf386 | 2455 | mesh_path_del(sdata, mpath->dst); |
b8bacc18 | 2456 | } |
79617dee | 2457 | |
f76b57b4 | 2458 | /* |
9d52501b JF |
2459 | * Use address extension if it is a packet from |
2460 | * another interface or if we know the destination | |
2461 | * is being proxied by a portal (i.e. portal address | |
2462 | * differs from proxied address) | |
f76b57b4 | 2463 | */ |
b203ca39 JP |
2464 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2465 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2466 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2467 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2468 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2469 | NULL, NULL); | |
79617dee | 2470 | } else { |
27f01124 TP |
2471 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2472 | * For unicast with unknown forwarding information, | |
2473 | * destination might be in the MBSS or if that fails | |
2474 | * forwarded to another mesh gate. In either case | |
2475 | * resolution will be handled in ieee80211_xmit(), so | |
2476 | * leave the original DA. This also works for mcast */ | |
2477 | const u8 *mesh_da = skb->data; | |
2478 | ||
2479 | if (mppath) | |
2480 | mesh_da = mppath->mpp; | |
2481 | else if (mpath) | |
2482 | mesh_da = mpath->dst; | |
79617dee | 2483 | |
3c5772a5 | 2484 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2485 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2486 | if (is_multicast_ether_addr(mesh_da)) |
2487 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2488 | meshhdrlen = ieee80211_new_mesh_header( |
2489 | sdata, &mesh_hdr, | |
2490 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2491 | else |
27f01124 | 2492 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2493 | meshhdrlen = ieee80211_new_mesh_header( |
2494 | sdata, &mesh_hdr, skb->data, | |
2495 | skb->data + ETH_ALEN); | |
79617dee | 2496 | |
79617dee | 2497 | } |
55de908a | 2498 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2499 | if (!chanctx_conf) { |
2500 | ret = -ENOTCONN; | |
2501 | goto free; | |
2502 | } | |
4bf88530 | 2503 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
2504 | break; |
2505 | #endif | |
05c914fe | 2506 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2507 | /* we already did checks when looking up the RA STA */ |
2508 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2509 | |
97ffe757 | 2510 | if (tdls_peer) { |
941c93cd AN |
2511 | /* DA SA BSSID */ |
2512 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2513 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2514 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2515 | hdrlen = 24; | |
2516 | } else if (sdata->u.mgd.use_4addr && | |
2517 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2518 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2519 | IEEE80211_FCTL_TODS); | |
f14543ee | 2520 | /* RA TA DA SA */ |
941c93cd | 2521 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2522 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2523 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2524 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2525 | hdrlen = 30; | |
2526 | } else { | |
2527 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2528 | /* BSSID SA DA */ | |
941c93cd | 2529 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2530 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2531 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2532 | hdrlen = 24; | |
2533 | } | |
55de908a | 2534 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2535 | if (!chanctx_conf) { |
2536 | ret = -ENOTCONN; | |
2537 | goto free; | |
2538 | } | |
4bf88530 | 2539 | band = chanctx_conf->def.chan->band; |
cf966838 | 2540 | break; |
239281f8 RL |
2541 | case NL80211_IFTYPE_OCB: |
2542 | /* DA SA BSSID */ | |
2543 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2544 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2545 | eth_broadcast_addr(hdr.addr3); | |
2546 | hdrlen = 24; | |
2547 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2548 | if (!chanctx_conf) { |
2549 | ret = -ENOTCONN; | |
2550 | goto free; | |
2551 | } | |
239281f8 RL |
2552 | band = chanctx_conf->def.chan->band; |
2553 | break; | |
05c914fe | 2554 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2555 | /* DA SA BSSID */ |
2556 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2557 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2558 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2559 | hdrlen = 24; |
55de908a | 2560 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2561 | if (!chanctx_conf) { |
2562 | ret = -ENOTCONN; | |
2563 | goto free; | |
2564 | } | |
4bf88530 | 2565 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2566 | break; |
2567 | default: | |
4c9451ed JB |
2568 | ret = -EINVAL; |
2569 | goto free; | |
e2ebc74d JB |
2570 | } |
2571 | ||
a729cff8 | 2572 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2573 | |
97ffe757 JB |
2574 | /* sta is always NULL for mesh */ |
2575 | if (sta) { | |
2576 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2577 | wme_sta = sta->sta.wme; | |
2578 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2579 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2580 | wme_sta = true; |
97ffe757 | 2581 | } |
4777be41 | 2582 | |
527871d7 JB |
2583 | /* receiver does QoS (which also means we do) use it */ |
2584 | if (wme_sta) { | |
065e9605 | 2585 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2586 | hdrlen += 2; |
2587 | } | |
2588 | ||
2589 | /* | |
238814fd JB |
2590 | * Drop unicast frames to unauthorised stations unless they are |
2591 | * EAPOL frames from the local station. | |
ce3edf6d | 2592 | */ |
55182e4a | 2593 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2594 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2595 | !multicast && !authorized && |
55182e4a | 2596 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2597 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2598 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2599 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2600 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2601 | #endif |
2602 | ||
2603 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2604 | ||
4c9451ed JB |
2605 | ret = -EPERM; |
2606 | goto free; | |
ce3edf6d JB |
2607 | } |
2608 | ||
a729cff8 JB |
2609 | if (unlikely(!multicast && skb->sk && |
2610 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2611 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2612 | |
bf7fa551 | 2613 | if (ack_skb) { |
a729cff8 | 2614 | unsigned long flags; |
9475af6e | 2615 | int id; |
a729cff8 JB |
2616 | |
2617 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2618 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2619 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2620 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2621 | ||
9475af6e | 2622 | if (id >= 0) { |
a729cff8 JB |
2623 | info_id = id; |
2624 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2625 | } else { |
bf7fa551 | 2626 | kfree_skb(ack_skb); |
a729cff8 | 2627 | } |
a729cff8 JB |
2628 | } |
2629 | } | |
2630 | ||
7e244707 HS |
2631 | /* |
2632 | * If the skb is shared we need to obtain our own copy. | |
2633 | */ | |
2634 | if (skb_shared(skb)) { | |
a729cff8 JB |
2635 | struct sk_buff *tmp_skb = skb; |
2636 | ||
2637 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2638 | WARN_ON(info_id); | |
2639 | ||
f8a0a781 | 2640 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2641 | kfree_skb(tmp_skb); |
2642 | ||
4c9451ed JB |
2643 | if (!skb) { |
2644 | ret = -ENOMEM; | |
2645 | goto free; | |
2646 | } | |
7e244707 HS |
2647 | } |
2648 | ||
065e9605 | 2649 | hdr.frame_control = fc; |
e2ebc74d JB |
2650 | hdr.duration_id = 0; |
2651 | hdr.seq_ctrl = 0; | |
2652 | ||
2653 | skip_header_bytes = ETH_HLEN; | |
2654 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2655 | encaps_data = bridge_tunnel_header; | |
2656 | encaps_len = sizeof(bridge_tunnel_header); | |
2657 | skip_header_bytes -= 2; | |
e5c5d22e | 2658 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2659 | encaps_data = rfc1042_header; |
2660 | encaps_len = sizeof(rfc1042_header); | |
2661 | skip_header_bytes -= 2; | |
2662 | } else { | |
2663 | encaps_data = NULL; | |
2664 | encaps_len = 0; | |
2665 | } | |
2666 | ||
2667 | skb_pull(skb, skip_header_bytes); | |
23c0752a | 2668 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2669 | |
23c0752a JB |
2670 | /* |
2671 | * So we need to modify the skb header and hence need a copy of | |
2672 | * that. The head_need variable above doesn't, so far, include | |
2673 | * the needed header space that we don't need right away. If we | |
2674 | * can, then we don't reallocate right now but only after the | |
2675 | * frame arrives at the master device (if it does...) | |
2676 | * | |
2677 | * If we cannot, however, then we will reallocate to include all | |
2678 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2679 | * make it big enough for everything we may ever need. | |
2680 | */ | |
e2ebc74d | 2681 | |
3a5be7d4 | 2682 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2683 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2684 | head_need += local->tx_headroom; |
2685 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2686 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2687 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2688 | skb = NULL; |
4c9451ed | 2689 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2690 | } |
e2ebc74d JB |
2691 | } |
2692 | ||
eae4430e | 2693 | if (encaps_data) |
e2ebc74d | 2694 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
c29b9b9b | 2695 | |
e4ab7eb0 | 2696 | #ifdef CONFIG_MAC80211_MESH |
eae4430e | 2697 | if (meshhdrlen > 0) |
33b64eb2 | 2698 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); |
e4ab7eb0 | 2699 | #endif |
33b64eb2 | 2700 | |
065e9605 | 2701 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2702 | __le16 *qos_control; |
2703 | ||
f359d3fe | 2704 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2705 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2706 | /* | |
2707 | * Maybe we could actually set some fields here, for now just | |
2708 | * initialise to zero to indicate no special operation. | |
2709 | */ | |
2710 | *qos_control = 0; | |
2711 | } else | |
2712 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2713 | ||
d57a544d | 2714 | skb_reset_mac_header(skb); |
e2ebc74d | 2715 | |
489ee919 | 2716 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2717 | memset(info, 0, sizeof(*info)); |
2718 | ||
a729cff8 JB |
2719 | info->flags = info_flags; |
2720 | info->ack_frame_id = info_id; | |
73c4e195 | 2721 | info->band = band; |
a729cff8 | 2722 | |
4c9451ed JB |
2723 | return skb; |
2724 | free: | |
2725 | kfree_skb(skb); | |
2726 | return ERR_PTR(ret); | |
2727 | } | |
2728 | ||
17c18bf8 JB |
2729 | /* |
2730 | * fast-xmit overview | |
2731 | * | |
2732 | * The core idea of this fast-xmit is to remove per-packet checks by checking | |
2733 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band | |
2734 | * checks that are needed to get the sta->fast_tx pointer assigned, after which | |
2735 | * much less work can be done per packet. For example, fragmentation must be | |
2736 | * disabled or the fast_tx pointer will not be set. All the conditions are seen | |
2737 | * in the code here. | |
2738 | * | |
2739 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 | |
2740 | * header and other data to aid packet processing in ieee80211_xmit_fast(). | |
2741 | * | |
2742 | * The most difficult part of this is that when any of these assumptions | |
2743 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), | |
2744 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, | |
2745 | * since the per-packet code no longer checks the conditions. This is reflected | |
2746 | * by the calls to these functions throughout the rest of the code, and must be | |
2747 | * maintained if any of the TX path checks change. | |
2748 | */ | |
2749 | ||
2750 | void ieee80211_check_fast_xmit(struct sta_info *sta) | |
2751 | { | |
2752 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; | |
2753 | struct ieee80211_local *local = sta->local; | |
2754 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2755 | struct ieee80211_hdr *hdr = (void *)build.hdr; | |
2756 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2757 | __le16 fc; | |
2758 | ||
30686bf7 | 2759 | if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT)) |
17c18bf8 JB |
2760 | return; |
2761 | ||
2762 | /* Locking here protects both the pointer itself, and against concurrent | |
2763 | * invocations winning data access races to, e.g., the key pointer that | |
2764 | * is used. | |
2765 | * Without it, the invocation of this function right after the key | |
2766 | * pointer changes wouldn't be sufficient, as another CPU could access | |
2767 | * the pointer, then stall, and then do the cache update after the CPU | |
2768 | * that invalidated the key. | |
2769 | * With the locking, such scenarios cannot happen as the check for the | |
2770 | * key and the fast-tx assignment are done atomically, so the CPU that | |
2771 | * modifies the key will either wait or other one will see the key | |
2772 | * cleared/changed already. | |
2773 | */ | |
2774 | spin_lock_bh(&sta->lock); | |
30686bf7 JB |
2775 | if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) && |
2776 | !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) && | |
17c18bf8 JB |
2777 | sdata->vif.type == NL80211_IFTYPE_STATION) |
2778 | goto out; | |
2779 | ||
2780 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2781 | goto out; | |
2782 | ||
2783 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
2784 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
f7418bc1 FF |
2785 | test_sta_flag(sta, WLAN_STA_PS_DELIVER) || |
2786 | test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT)) | |
17c18bf8 JB |
2787 | goto out; |
2788 | ||
2789 | if (sdata->noack_map) | |
2790 | goto out; | |
2791 | ||
2792 | /* fast-xmit doesn't handle fragmentation at all */ | |
725b812c | 2793 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
f3fe4e93 | 2794 | !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG)) |
17c18bf8 JB |
2795 | goto out; |
2796 | ||
2797 | rcu_read_lock(); | |
2798 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2799 | if (!chanctx_conf) { | |
2800 | rcu_read_unlock(); | |
2801 | goto out; | |
2802 | } | |
2803 | build.band = chanctx_conf->def.chan->band; | |
2804 | rcu_read_unlock(); | |
2805 | ||
2806 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
2807 | ||
2808 | switch (sdata->vif.type) { | |
3ffd8840 JB |
2809 | case NL80211_IFTYPE_ADHOC: |
2810 | /* DA SA BSSID */ | |
2811 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2812 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2813 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); | |
2814 | build.hdr_len = 24; | |
2815 | break; | |
17c18bf8 JB |
2816 | case NL80211_IFTYPE_STATION: |
2817 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { | |
2818 | /* DA SA BSSID */ | |
2819 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2820 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2821 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2822 | build.hdr_len = 24; | |
2823 | break; | |
2824 | } | |
2825 | ||
2826 | if (sdata->u.mgd.use_4addr) { | |
2827 | /* non-regular ethertype cannot use the fastpath */ | |
2828 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2829 | IEEE80211_FCTL_TODS); | |
2830 | /* RA TA DA SA */ | |
2831 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2832 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2833 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2834 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2835 | build.hdr_len = 30; | |
2836 | break; | |
2837 | } | |
2838 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2839 | /* BSSID SA DA */ | |
2840 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2841 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2842 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2843 | build.hdr_len = 24; | |
2844 | break; | |
2845 | case NL80211_IFTYPE_AP_VLAN: | |
2846 | if (sdata->wdev.use_4addr) { | |
2847 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2848 | IEEE80211_FCTL_TODS); | |
2849 | /* RA TA DA SA */ | |
2850 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); | |
2851 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2852 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2853 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2854 | build.hdr_len = 30; | |
2855 | break; | |
2856 | } | |
2857 | /* fall through */ | |
2858 | case NL80211_IFTYPE_AP: | |
2859 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
2860 | /* DA BSSID SA */ | |
2861 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2862 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2863 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
2864 | build.hdr_len = 24; | |
2865 | break; | |
2866 | default: | |
2867 | /* not handled on fast-xmit */ | |
2868 | goto out; | |
2869 | } | |
2870 | ||
2871 | if (sta->sta.wme) { | |
2872 | build.hdr_len += 2; | |
2873 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
2874 | } | |
2875 | ||
2876 | /* We store the key here so there's no point in using rcu_dereference() | |
2877 | * but that's fine because the code that changes the pointers will call | |
2878 | * this function after doing so. For a single CPU that would be enough, | |
2879 | * for multiple see the comment above. | |
2880 | */ | |
2881 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); | |
2882 | if (!build.key) | |
2883 | build.key = rcu_access_pointer(sdata->default_unicast_key); | |
2884 | if (build.key) { | |
e495c247 | 2885 | bool gen_iv, iv_spc, mmic; |
17c18bf8 JB |
2886 | |
2887 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; | |
2888 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; | |
e495c247 | 2889 | mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC; |
17c18bf8 JB |
2890 | |
2891 | /* don't handle software crypto */ | |
2892 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
2893 | goto out; | |
2894 | ||
2895 | switch (build.key->conf.cipher) { | |
2896 | case WLAN_CIPHER_SUITE_CCMP: | |
2897 | case WLAN_CIPHER_SUITE_CCMP_256: | |
2898 | /* add fixed key ID */ | |
2899 | if (gen_iv) { | |
2900 | (build.hdr + build.hdr_len)[3] = | |
2901 | 0x20 | (build.key->conf.keyidx << 6); | |
2902 | build.pn_offs = build.hdr_len; | |
2903 | } | |
2904 | if (gen_iv || iv_spc) | |
2905 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; | |
2906 | break; | |
2907 | case WLAN_CIPHER_SUITE_GCMP: | |
2908 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2909 | /* add fixed key ID */ | |
2910 | if (gen_iv) { | |
2911 | (build.hdr + build.hdr_len)[3] = | |
2912 | 0x20 | (build.key->conf.keyidx << 6); | |
2913 | build.pn_offs = build.hdr_len; | |
2914 | } | |
2915 | if (gen_iv || iv_spc) | |
2916 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; | |
2917 | break; | |
e495c247 JB |
2918 | case WLAN_CIPHER_SUITE_TKIP: |
2919 | /* cannot handle MMIC or IV generation in xmit-fast */ | |
2920 | if (mmic || gen_iv) | |
2921 | goto out; | |
2922 | if (iv_spc) | |
2923 | build.hdr_len += IEEE80211_TKIP_IV_LEN; | |
2924 | break; | |
2925 | case WLAN_CIPHER_SUITE_WEP40: | |
2926 | case WLAN_CIPHER_SUITE_WEP104: | |
2927 | /* cannot handle IV generation in fast-xmit */ | |
2928 | if (gen_iv) | |
2929 | goto out; | |
2930 | if (iv_spc) | |
2931 | build.hdr_len += IEEE80211_WEP_IV_LEN; | |
2932 | break; | |
2933 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
2934 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
2935 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
2936 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
2937 | WARN(1, | |
2938 | "management cipher suite 0x%x enabled for data\n", | |
2939 | build.key->conf.cipher); | |
17c18bf8 | 2940 | goto out; |
e495c247 JB |
2941 | default: |
2942 | /* we don't know how to generate IVs for this at all */ | |
2943 | if (WARN_ON(gen_iv)) | |
2944 | goto out; | |
2945 | /* pure hardware keys are OK, of course */ | |
2946 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) | |
2947 | break; | |
2948 | /* cipher scheme might require space allocation */ | |
2949 | if (iv_spc && | |
2950 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) | |
2951 | goto out; | |
2952 | if (iv_spc) | |
2953 | build.hdr_len += build.key->conf.iv_len; | |
17c18bf8 JB |
2954 | } |
2955 | ||
2956 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
2957 | } | |
2958 | ||
2959 | hdr->frame_control = fc; | |
2960 | ||
2961 | memcpy(build.hdr + build.hdr_len, | |
2962 | rfc1042_header, sizeof(rfc1042_header)); | |
2963 | build.hdr_len += sizeof(rfc1042_header); | |
2964 | ||
2965 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); | |
2966 | /* if the kmemdup fails, continue w/o fast_tx */ | |
2967 | if (!fast_tx) | |
2968 | goto out; | |
2969 | ||
2970 | out: | |
2971 | /* we might have raced against another call to this function */ | |
2972 | old = rcu_dereference_protected(sta->fast_tx, | |
2973 | lockdep_is_held(&sta->lock)); | |
2974 | rcu_assign_pointer(sta->fast_tx, fast_tx); | |
2975 | if (old) | |
2976 | kfree_rcu(old, rcu_head); | |
2977 | spin_unlock_bh(&sta->lock); | |
2978 | } | |
2979 | ||
2980 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) | |
2981 | { | |
2982 | struct sta_info *sta; | |
2983 | ||
2984 | rcu_read_lock(); | |
2985 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
2986 | ieee80211_check_fast_xmit(sta); | |
2987 | rcu_read_unlock(); | |
2988 | } | |
2989 | ||
2990 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) | |
2991 | { | |
2992 | struct ieee80211_local *local = sdata->local; | |
2993 | struct sta_info *sta; | |
2994 | ||
2995 | rcu_read_lock(); | |
2996 | ||
2997 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
2998 | if (sdata != sta->sdata && | |
2999 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
3000 | continue; | |
3001 | ieee80211_check_fast_xmit(sta); | |
3002 | } | |
3003 | ||
3004 | rcu_read_unlock(); | |
3005 | } | |
3006 | ||
3007 | void ieee80211_clear_fast_xmit(struct sta_info *sta) | |
3008 | { | |
3009 | struct ieee80211_fast_tx *fast_tx; | |
3010 | ||
3011 | spin_lock_bh(&sta->lock); | |
3012 | fast_tx = rcu_dereference_protected(sta->fast_tx, | |
3013 | lockdep_is_held(&sta->lock)); | |
3014 | RCU_INIT_POINTER(sta->fast_tx, NULL); | |
3015 | spin_unlock_bh(&sta->lock); | |
3016 | ||
3017 | if (fast_tx) | |
3018 | kfree_rcu(fast_tx, rcu_head); | |
3019 | } | |
3020 | ||
6e0456b5 FF |
3021 | static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local, |
3022 | struct sk_buff *skb, int headroom, | |
3023 | int *subframe_len) | |
3024 | { | |
3025 | int amsdu_len = *subframe_len + sizeof(struct ethhdr); | |
3026 | int padding = (4 - amsdu_len) & 3; | |
3027 | ||
3028 | if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) { | |
3029 | I802_DEBUG_INC(local->tx_expand_skb_head); | |
3030 | ||
3031 | if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) { | |
3032 | wiphy_debug(local->hw.wiphy, | |
3033 | "failed to reallocate TX buffer\n"); | |
3034 | return false; | |
3035 | } | |
3036 | } | |
3037 | ||
3038 | if (padding) { | |
3039 | *subframe_len += padding; | |
3040 | memset(skb_put(skb, padding), 0, padding); | |
3041 | } | |
3042 | ||
3043 | return true; | |
3044 | } | |
3045 | ||
3046 | static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata, | |
3047 | struct ieee80211_fast_tx *fast_tx, | |
3048 | struct sk_buff *skb) | |
3049 | { | |
3050 | struct ieee80211_local *local = sdata->local; | |
3051 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3052 | struct ieee80211_hdr *hdr; | |
06f2bb1e | 3053 | struct ethhdr *amsdu_hdr; |
6e0456b5 FF |
3054 | int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header); |
3055 | int subframe_len = skb->len - hdr_len; | |
3056 | void *data; | |
06f2bb1e | 3057 | u8 *qc, *h_80211_src, *h_80211_dst; |
a3e2f4b6 | 3058 | const u8 *bssid; |
6e0456b5 FF |
3059 | |
3060 | if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) | |
3061 | return false; | |
3062 | ||
3063 | if (info->control.flags & IEEE80211_TX_CTRL_AMSDU) | |
3064 | return true; | |
3065 | ||
06f2bb1e | 3066 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr), |
6e0456b5 FF |
3067 | &subframe_len)) |
3068 | return false; | |
3069 | ||
06f2bb1e MB |
3070 | data = skb_push(skb, sizeof(*amsdu_hdr)); |
3071 | memmove(data, data + sizeof(*amsdu_hdr), hdr_len); | |
3072 | hdr = data; | |
3073 | amsdu_hdr = data + hdr_len; | |
3074 | /* h_80211_src/dst is addr* field within hdr */ | |
3075 | h_80211_src = data + fast_tx->sa_offs; | |
3076 | h_80211_dst = data + fast_tx->da_offs; | |
6e0456b5 | 3077 | |
06f2bb1e MB |
3078 | amsdu_hdr->h_proto = cpu_to_be16(subframe_len); |
3079 | ether_addr_copy(amsdu_hdr->h_source, h_80211_src); | |
3080 | ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst); | |
6e0456b5 | 3081 | |
a3e2f4b6 MB |
3082 | /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA |
3083 | * fields needs to be changed to BSSID for A-MSDU frames depending | |
3084 | * on FromDS/ToDS values. | |
3085 | */ | |
3086 | switch (sdata->vif.type) { | |
3087 | case NL80211_IFTYPE_STATION: | |
3088 | bssid = sdata->u.mgd.bssid; | |
3089 | break; | |
3090 | case NL80211_IFTYPE_AP: | |
3091 | case NL80211_IFTYPE_AP_VLAN: | |
3092 | bssid = sdata->vif.addr; | |
3093 | break; | |
3094 | default: | |
3095 | bssid = NULL; | |
3096 | } | |
3097 | ||
3098 | if (bssid && ieee80211_has_fromds(hdr->frame_control)) | |
3099 | ether_addr_copy(h_80211_src, bssid); | |
3100 | ||
3101 | if (bssid && ieee80211_has_tods(hdr->frame_control)) | |
3102 | ether_addr_copy(h_80211_dst, bssid); | |
3103 | ||
6e0456b5 FF |
3104 | qc = ieee80211_get_qos_ctl(hdr); |
3105 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
3106 | ||
3107 | info->control.flags |= IEEE80211_TX_CTRL_AMSDU; | |
3108 | ||
3109 | return true; | |
3110 | } | |
3111 | ||
3112 | static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata, | |
3113 | struct sta_info *sta, | |
3114 | struct ieee80211_fast_tx *fast_tx, | |
3115 | struct sk_buff *skb) | |
3116 | { | |
3117 | struct ieee80211_local *local = sdata->local; | |
fa962b92 MK |
3118 | struct fq *fq = &local->fq; |
3119 | struct fq_tin *tin; | |
3120 | struct fq_flow *flow; | |
6e0456b5 FF |
3121 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; |
3122 | struct ieee80211_txq *txq = sta->sta.txq[tid]; | |
3123 | struct txq_info *txqi; | |
3124 | struct sk_buff **frag_tail, *head; | |
3125 | int subframe_len = skb->len - ETH_ALEN; | |
3126 | u8 max_subframes = sta->sta.max_amsdu_subframes; | |
3127 | int max_frags = local->hw.max_tx_fragments; | |
3128 | int max_amsdu_len = sta->sta.max_amsdu_len; | |
3129 | __be16 len; | |
3130 | void *data; | |
3131 | bool ret = false; | |
fa962b92 | 3132 | unsigned int orig_len; |
6e0456b5 FF |
3133 | int n = 1, nfrags; |
3134 | ||
3135 | if (!ieee80211_hw_check(&local->hw, TX_AMSDU)) | |
3136 | return false; | |
3137 | ||
3138 | if (!txq) | |
3139 | return false; | |
3140 | ||
3141 | txqi = to_txq_info(txq); | |
3142 | if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags)) | |
3143 | return false; | |
3144 | ||
3145 | if (sta->sta.max_rc_amsdu_len) | |
3146 | max_amsdu_len = min_t(int, max_amsdu_len, | |
3147 | sta->sta.max_rc_amsdu_len); | |
3148 | ||
fa962b92 | 3149 | spin_lock_bh(&fq->lock); |
6e0456b5 | 3150 | |
fa962b92 MK |
3151 | /* TODO: Ideally aggregation should be done on dequeue to remain |
3152 | * responsive to environment changes. | |
3153 | */ | |
3154 | ||
3155 | tin = &txqi->tin; | |
3156 | flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func); | |
3157 | head = skb_peek_tail(&flow->queue); | |
6e0456b5 FF |
3158 | if (!head) |
3159 | goto out; | |
3160 | ||
fa962b92 MK |
3161 | orig_len = head->len; |
3162 | ||
6e0456b5 FF |
3163 | if (skb->len + head->len > max_amsdu_len) |
3164 | goto out; | |
3165 | ||
3166 | if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head)) | |
3167 | goto out; | |
3168 | ||
3169 | nfrags = 1 + skb_shinfo(skb)->nr_frags; | |
3170 | nfrags += 1 + skb_shinfo(head)->nr_frags; | |
3171 | frag_tail = &skb_shinfo(head)->frag_list; | |
3172 | while (*frag_tail) { | |
3173 | nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags; | |
3174 | frag_tail = &(*frag_tail)->next; | |
3175 | n++; | |
3176 | } | |
3177 | ||
3178 | if (max_subframes && n > max_subframes) | |
3179 | goto out; | |
3180 | ||
3181 | if (max_frags && nfrags > max_frags) | |
3182 | goto out; | |
3183 | ||
3184 | if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2, | |
3185 | &subframe_len)) | |
3186 | goto out; | |
3187 | ||
3188 | ret = true; | |
3189 | data = skb_push(skb, ETH_ALEN + 2); | |
3190 | memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN); | |
3191 | ||
3192 | data += 2 * ETH_ALEN; | |
3193 | len = cpu_to_be16(subframe_len); | |
3194 | memcpy(data, &len, 2); | |
3195 | memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header)); | |
3196 | ||
3197 | head->len += skb->len; | |
3198 | head->data_len += skb->len; | |
3199 | *frag_tail = skb; | |
3200 | ||
fa962b92 MK |
3201 | flow->backlog += head->len - orig_len; |
3202 | tin->backlog_bytes += head->len - orig_len; | |
3203 | ||
3204 | fq_recalc_backlog(fq, tin, flow); | |
3205 | ||
6e0456b5 | 3206 | out: |
fa962b92 | 3207 | spin_unlock_bh(&fq->lock); |
6e0456b5 FF |
3208 | |
3209 | return ret; | |
3210 | } | |
3211 | ||
bb42f2d1 THJ |
3212 | /* |
3213 | * Can be called while the sta lock is held. Anything that can cause packets to | |
3214 | * be generated will cause deadlock! | |
3215 | */ | |
3216 | static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata, | |
3217 | struct sta_info *sta, u8 pn_offs, | |
3218 | struct ieee80211_key *key, | |
3219 | struct sk_buff *skb) | |
3220 | { | |
3221 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3222 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
3223 | u8 tid = IEEE80211_NUM_TIDS; | |
3224 | ||
3225 | if (key) | |
3226 | info->control.hw_key = &key->conf; | |
3227 | ||
3228 | ieee80211_tx_stats(skb->dev, skb->len); | |
3229 | ||
3230 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3231 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
bb42f2d1 THJ |
3232 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); |
3233 | } else { | |
3234 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
3235 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); | |
3236 | sdata->sequence_number += 0x10; | |
3237 | } | |
3238 | ||
3239 | if (skb_shinfo(skb)->gso_size) | |
3240 | sta->tx_stats.msdu[tid] += | |
3241 | DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size); | |
3242 | else | |
3243 | sta->tx_stats.msdu[tid]++; | |
3244 | ||
3245 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
3246 | ||
3247 | /* statistics normally done by ieee80211_tx_h_stats (but that | |
3248 | * has to consider fragmentation, so is more complex) | |
3249 | */ | |
3250 | sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len; | |
3251 | sta->tx_stats.packets[skb_get_queue_mapping(skb)]++; | |
3252 | ||
3253 | if (pn_offs) { | |
3254 | u64 pn; | |
3255 | u8 *crypto_hdr = skb->data + pn_offs; | |
3256 | ||
3257 | switch (key->conf.cipher) { | |
3258 | case WLAN_CIPHER_SUITE_CCMP: | |
3259 | case WLAN_CIPHER_SUITE_CCMP_256: | |
3260 | case WLAN_CIPHER_SUITE_GCMP: | |
3261 | case WLAN_CIPHER_SUITE_GCMP_256: | |
3262 | pn = atomic64_inc_return(&key->conf.tx_pn); | |
3263 | crypto_hdr[0] = pn; | |
3264 | crypto_hdr[1] = pn >> 8; | |
3265 | crypto_hdr[4] = pn >> 16; | |
3266 | crypto_hdr[5] = pn >> 24; | |
3267 | crypto_hdr[6] = pn >> 32; | |
3268 | crypto_hdr[7] = pn >> 40; | |
3269 | break; | |
3270 | } | |
3271 | } | |
3272 | } | |
3273 | ||
17c18bf8 | 3274 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, |
bb42f2d1 | 3275 | struct sta_info *sta, |
17c18bf8 JB |
3276 | struct ieee80211_fast_tx *fast_tx, |
3277 | struct sk_buff *skb) | |
3278 | { | |
3279 | struct ieee80211_local *local = sdata->local; | |
3280 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; | |
3281 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); | |
3282 | int hw_headroom = sdata->local->hw.extra_tx_headroom; | |
3283 | struct ethhdr eth; | |
35f432a0 | 3284 | struct ieee80211_tx_info *info; |
17c18bf8 JB |
3285 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; |
3286 | struct ieee80211_tx_data tx; | |
3287 | ieee80211_tx_result r; | |
3288 | struct tid_ampdu_tx *tid_tx = NULL; | |
3289 | u8 tid = IEEE80211_NUM_TIDS; | |
3290 | ||
3291 | /* control port protocol needs a lot of special handling */ | |
3292 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) | |
3293 | return false; | |
3294 | ||
3295 | /* only RFC 1042 SNAP */ | |
3296 | if (ethertype < ETH_P_802_3_MIN) | |
3297 | return false; | |
3298 | ||
3299 | /* don't handle TX status request here either */ | |
3300 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) | |
3301 | return false; | |
3302 | ||
3303 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
3304 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3305 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
472be00d JB |
3306 | if (tid_tx) { |
3307 | if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) | |
3308 | return false; | |
3309 | if (tid_tx->timeout) | |
3310 | tid_tx->last_tx = jiffies; | |
3311 | } | |
17c18bf8 JB |
3312 | } |
3313 | ||
3314 | /* after this point (skb is modified) we cannot return false */ | |
3315 | ||
3316 | if (skb_shared(skb)) { | |
3317 | struct sk_buff *tmp_skb = skb; | |
3318 | ||
3319 | skb = skb_clone(skb, GFP_ATOMIC); | |
3320 | kfree_skb(tmp_skb); | |
3321 | ||
3322 | if (!skb) | |
3323 | return true; | |
3324 | } | |
3325 | ||
6e0456b5 FF |
3326 | if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) && |
3327 | ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb)) | |
3328 | return true; | |
3329 | ||
17c18bf8 JB |
3330 | /* will not be crypto-handled beyond what we do here, so use false |
3331 | * as the may-encrypt argument for the resize to not account for | |
3332 | * more room than we already have in 'extra_head' | |
3333 | */ | |
3334 | if (unlikely(ieee80211_skb_resize(sdata, skb, | |
3335 | max_t(int, extra_head + hw_headroom - | |
3336 | skb_headroom(skb), 0), | |
3337 | false))) { | |
3338 | kfree_skb(skb); | |
3339 | return true; | |
3340 | } | |
3341 | ||
3342 | memcpy(ð, skb->data, ETH_HLEN - 2); | |
3343 | hdr = (void *)skb_push(skb, extra_head); | |
3344 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); | |
3345 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); | |
3346 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); | |
3347 | ||
35f432a0 | 3348 | info = IEEE80211_SKB_CB(skb); |
17c18bf8 JB |
3349 | memset(info, 0, sizeof(*info)); |
3350 | info->band = fast_tx->band; | |
3351 | info->control.vif = &sdata->vif; | |
3352 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | | |
3353 | IEEE80211_TX_CTL_DONTFRAG | | |
3354 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); | |
bb42f2d1 | 3355 | info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT; |
17c18bf8 | 3356 | |
a786f96d FF |
3357 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { |
3358 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
3359 | *ieee80211_get_qos_ctl(hdr) = tid; | |
3360 | } | |
3361 | ||
17c18bf8 JB |
3362 | __skb_queue_head_init(&tx.skbs); |
3363 | ||
3364 | tx.flags = IEEE80211_TX_UNICAST; | |
3365 | tx.local = local; | |
3366 | tx.sdata = sdata; | |
3367 | tx.sta = sta; | |
3368 | tx.key = fast_tx->key; | |
3369 | ||
30686bf7 | 3370 | if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) { |
17c18bf8 JB |
3371 | tx.skb = skb; |
3372 | r = ieee80211_tx_h_rate_ctrl(&tx); | |
3373 | skb = tx.skb; | |
3374 | tx.skb = NULL; | |
3375 | ||
3376 | if (r != TX_CONTINUE) { | |
3377 | if (r != TX_QUEUED) | |
3378 | kfree_skb(skb); | |
3379 | return true; | |
3380 | } | |
3381 | } | |
3382 | ||
bb42f2d1 THJ |
3383 | if (ieee80211_queue_skb(local, sdata, sta, skb)) |
3384 | return true; | |
17c18bf8 | 3385 | |
bb42f2d1 THJ |
3386 | ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs, |
3387 | fast_tx->key, skb); | |
17c18bf8 JB |
3388 | |
3389 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3390 | sdata = container_of(sdata->bss, | |
3391 | struct ieee80211_sub_if_data, u.ap); | |
3392 | ||
3393 | __skb_queue_tail(&tx.skbs, skb); | |
3394 | ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false); | |
3395 | return true; | |
3396 | } | |
3397 | ||
e0e2efff THJ |
3398 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, |
3399 | struct ieee80211_txq *txq) | |
3400 | { | |
3401 | struct ieee80211_local *local = hw_to_local(hw); | |
3402 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); | |
3403 | struct ieee80211_hdr *hdr; | |
3404 | struct sk_buff *skb = NULL; | |
3405 | struct fq *fq = &local->fq; | |
3406 | struct fq_tin *tin = &txqi->tin; | |
bb42f2d1 THJ |
3407 | struct ieee80211_tx_info *info; |
3408 | struct ieee80211_tx_data tx; | |
3409 | ieee80211_tx_result r; | |
e0e2efff THJ |
3410 | |
3411 | spin_lock_bh(&fq->lock); | |
3412 | ||
3413 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags)) | |
3414 | goto out; | |
3415 | ||
bb42f2d1 THJ |
3416 | /* Make sure fragments stay together. */ |
3417 | skb = __skb_dequeue(&txqi->frags); | |
3418 | if (skb) | |
3419 | goto out; | |
3420 | ||
3421 | begin: | |
e0e2efff THJ |
3422 | skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func); |
3423 | if (!skb) | |
3424 | goto out; | |
3425 | ||
3426 | ieee80211_set_skb_vif(skb, txqi); | |
3427 | ||
3428 | hdr = (struct ieee80211_hdr *)skb->data; | |
bb42f2d1 THJ |
3429 | info = IEEE80211_SKB_CB(skb); |
3430 | ||
3431 | memset(&tx, 0, sizeof(tx)); | |
3432 | __skb_queue_head_init(&tx.skbs); | |
3433 | tx.local = local; | |
3434 | tx.skb = skb; | |
3435 | tx.sdata = vif_to_sdata(info->control.vif); | |
3436 | ||
3437 | if (txq->sta) | |
3438 | tx.sta = container_of(txq->sta, struct sta_info, sta); | |
3439 | ||
3440 | /* | |
3441 | * The key can be removed while the packet was queued, so need to call | |
3442 | * this here to get the current key. | |
3443 | */ | |
3444 | r = ieee80211_tx_h_select_key(&tx); | |
3445 | if (r != TX_CONTINUE) { | |
3446 | ieee80211_free_txskb(&local->hw, skb); | |
3447 | goto begin; | |
3448 | } | |
3449 | ||
c1f4c9ed FF |
3450 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) |
3451 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
3452 | else | |
3453 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
3454 | ||
bb42f2d1 | 3455 | if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) { |
e0e2efff THJ |
3456 | struct sta_info *sta = container_of(txq->sta, struct sta_info, |
3457 | sta); | |
bb42f2d1 | 3458 | u8 pn_offs = 0; |
e0e2efff | 3459 | |
bb42f2d1 THJ |
3460 | if (tx.key && |
3461 | (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV)) | |
3462 | pn_offs = ieee80211_hdrlen(hdr->frame_control); | |
3463 | ||
3464 | ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs, | |
3465 | tx.key, skb); | |
3466 | } else { | |
3467 | if (invoke_tx_handlers_late(&tx)) | |
3468 | goto begin; | |
3469 | ||
3470 | skb = __skb_dequeue(&tx.skbs); | |
3471 | ||
3472 | if (!skb_queue_empty(&tx.skbs)) | |
3473 | skb_queue_splice_tail(&tx.skbs, &txqi->frags); | |
e0e2efff THJ |
3474 | } |
3475 | ||
1e1430d5 JB |
3476 | if (skb && skb_has_frag_list(skb) && |
3477 | !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) { | |
3478 | if (skb_linearize(skb)) { | |
3479 | ieee80211_free_txskb(&local->hw, skb); | |
3480 | goto begin; | |
3481 | } | |
3482 | } | |
3483 | ||
e0e2efff THJ |
3484 | out: |
3485 | spin_unlock_bh(&fq->lock); | |
3486 | ||
e0e2efff THJ |
3487 | return skb; |
3488 | } | |
3489 | EXPORT_SYMBOL(ieee80211_tx_dequeue); | |
3490 | ||
4c9451ed JB |
3491 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
3492 | struct net_device *dev, | |
3493 | u32 info_flags) | |
3494 | { | |
3495 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
97ffe757 | 3496 | struct sta_info *sta; |
80616c0d | 3497 | struct sk_buff *next; |
4c9451ed JB |
3498 | |
3499 | if (unlikely(skb->len < ETH_HLEN)) { | |
3500 | kfree_skb(skb); | |
3501 | return; | |
3502 | } | |
3503 | ||
3504 | rcu_read_lock(); | |
e2ebc74d | 3505 | |
2d981fdd JB |
3506 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
3507 | goto out_free; | |
4c9451ed | 3508 | |
17c18bf8 JB |
3509 | if (!IS_ERR_OR_NULL(sta)) { |
3510 | struct ieee80211_fast_tx *fast_tx; | |
3511 | ||
3512 | fast_tx = rcu_dereference(sta->fast_tx); | |
3513 | ||
3514 | if (fast_tx && | |
bb42f2d1 | 3515 | ieee80211_xmit_fast(sdata, sta, fast_tx, skb)) |
17c18bf8 JB |
3516 | goto out; |
3517 | } | |
3518 | ||
80616c0d JB |
3519 | if (skb_is_gso(skb)) { |
3520 | struct sk_buff *segs; | |
680a0dab | 3521 | |
80616c0d JB |
3522 | segs = skb_gso_segment(skb, 0); |
3523 | if (IS_ERR(segs)) { | |
2d981fdd | 3524 | goto out_free; |
80616c0d JB |
3525 | } else if (segs) { |
3526 | consume_skb(skb); | |
3527 | skb = segs; | |
3528 | } | |
3529 | } else { | |
3530 | /* we cannot process non-linear frames on this path */ | |
3531 | if (skb_linearize(skb)) { | |
3532 | kfree_skb(skb); | |
3533 | goto out; | |
3534 | } | |
3535 | ||
3536 | /* the frame could be fragmented, software-encrypted, and other | |
3537 | * things so we cannot really handle checksum offload with it - | |
3538 | * fix it up in software before we handle anything else. | |
3539 | */ | |
3540 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
f603f1f3 JB |
3541 | skb_set_transport_header(skb, |
3542 | skb_checksum_start_offset(skb)); | |
80616c0d JB |
3543 | if (skb_checksum_help(skb)) |
3544 | goto out_free; | |
3545 | } | |
2d981fdd JB |
3546 | } |
3547 | ||
80616c0d JB |
3548 | next = skb; |
3549 | while (next) { | |
3550 | skb = next; | |
3551 | next = skb->next; | |
4c9451ed | 3552 | |
80616c0d JB |
3553 | skb->prev = NULL; |
3554 | skb->next = NULL; | |
3555 | ||
3556 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
3557 | if (IS_ERR(skb)) | |
3558 | goto out; | |
e2ebc74d | 3559 | |
5a490510 | 3560 | ieee80211_tx_stats(dev, skb->len); |
80616c0d JB |
3561 | |
3562 | ieee80211_xmit(sdata, sta, skb); | |
3563 | } | |
2d981fdd JB |
3564 | goto out; |
3565 | out_free: | |
3566 | kfree_skb(skb); | |
4c9451ed | 3567 | out: |
55de908a | 3568 | rcu_read_unlock(); |
e2ebc74d JB |
3569 | } |
3570 | ||
ebceec86 MB |
3571 | static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta) |
3572 | { | |
3573 | struct ethhdr *eth; | |
3574 | int err; | |
3575 | ||
3576 | err = skb_ensure_writable(skb, ETH_HLEN); | |
3577 | if (unlikely(err)) | |
3578 | return err; | |
3579 | ||
3580 | eth = (void *)skb->data; | |
3581 | ether_addr_copy(eth->h_dest, sta->sta.addr); | |
3582 | ||
3583 | return 0; | |
3584 | } | |
3585 | ||
3586 | static bool ieee80211_multicast_to_unicast(struct sk_buff *skb, | |
3587 | struct net_device *dev) | |
3588 | { | |
3589 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3590 | const struct ethhdr *eth = (void *)skb->data; | |
3591 | const struct vlan_ethhdr *ethvlan = (void *)skb->data; | |
3592 | __be16 ethertype; | |
3593 | ||
3594 | if (likely(!is_multicast_ether_addr(eth->h_dest))) | |
3595 | return false; | |
3596 | ||
3597 | switch (sdata->vif.type) { | |
3598 | case NL80211_IFTYPE_AP_VLAN: | |
3599 | if (sdata->u.vlan.sta) | |
3600 | return false; | |
3601 | if (sdata->wdev.use_4addr) | |
3602 | return false; | |
3603 | /* fall through */ | |
3604 | case NL80211_IFTYPE_AP: | |
3605 | /* check runtime toggle for this bss */ | |
3606 | if (!sdata->bss->multicast_to_unicast) | |
3607 | return false; | |
3608 | break; | |
3609 | default: | |
3610 | return false; | |
3611 | } | |
3612 | ||
3613 | /* multicast to unicast conversion only for some payload */ | |
3614 | ethertype = eth->h_proto; | |
3615 | if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN) | |
3616 | ethertype = ethvlan->h_vlan_encapsulated_proto; | |
3617 | switch (ethertype) { | |
3618 | case htons(ETH_P_ARP): | |
3619 | case htons(ETH_P_IP): | |
3620 | case htons(ETH_P_IPV6): | |
3621 | break; | |
3622 | default: | |
3623 | return false; | |
3624 | } | |
3625 | ||
3626 | return true; | |
3627 | } | |
3628 | ||
3629 | static void | |
3630 | ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev, | |
3631 | struct sk_buff_head *queue) | |
3632 | { | |
3633 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3634 | struct ieee80211_local *local = sdata->local; | |
3635 | const struct ethhdr *eth = (struct ethhdr *)skb->data; | |
3636 | struct sta_info *sta, *first = NULL; | |
3637 | struct sk_buff *cloned_skb; | |
3638 | ||
3639 | rcu_read_lock(); | |
3640 | ||
3641 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
3642 | if (sdata != sta->sdata) | |
3643 | /* AP-VLAN mismatch */ | |
3644 | continue; | |
3645 | if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr))) | |
3646 | /* do not send back to source */ | |
3647 | continue; | |
3648 | if (!first) { | |
3649 | first = sta; | |
3650 | continue; | |
3651 | } | |
3652 | cloned_skb = skb_clone(skb, GFP_ATOMIC); | |
3653 | if (!cloned_skb) | |
3654 | goto multicast; | |
3655 | if (unlikely(ieee80211_change_da(cloned_skb, sta))) { | |
3656 | dev_kfree_skb(cloned_skb); | |
3657 | goto multicast; | |
3658 | } | |
3659 | __skb_queue_tail(queue, cloned_skb); | |
3660 | } | |
3661 | ||
3662 | if (likely(first)) { | |
3663 | if (unlikely(ieee80211_change_da(skb, first))) | |
3664 | goto multicast; | |
3665 | __skb_queue_tail(queue, skb); | |
3666 | } else { | |
3667 | /* no STA connected, drop */ | |
3668 | kfree_skb(skb); | |
3669 | skb = NULL; | |
3670 | } | |
3671 | ||
3672 | goto out; | |
3673 | multicast: | |
3674 | __skb_queue_purge(queue); | |
3675 | __skb_queue_tail(queue, skb); | |
3676 | out: | |
3677 | rcu_read_unlock(); | |
3678 | } | |
3679 | ||
4c9451ed JB |
3680 | /** |
3681 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
3682 | * @skb: packet to be sent | |
3683 | * @dev: incoming interface | |
3684 | * | |
3685 | * On failure skb will be freed. | |
3686 | */ | |
24d342c5 LK |
3687 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
3688 | struct net_device *dev) | |
3689 | { | |
ebceec86 MB |
3690 | if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) { |
3691 | struct sk_buff_head queue; | |
3692 | ||
3693 | __skb_queue_head_init(&queue); | |
3694 | ieee80211_convert_to_unicast(skb, dev, &queue); | |
3695 | while ((skb = __skb_dequeue(&queue))) | |
3696 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
3697 | } else { | |
3698 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
3699 | } | |
3700 | ||
24d342c5 LK |
3701 | return NETDEV_TX_OK; |
3702 | } | |
e2ebc74d | 3703 | |
7528ec57 JB |
3704 | struct sk_buff * |
3705 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
3706 | struct sk_buff *skb, u32 info_flags) | |
3707 | { | |
3708 | struct ieee80211_hdr *hdr; | |
3709 | struct ieee80211_tx_data tx = { | |
3710 | .local = sdata->local, | |
3711 | .sdata = sdata, | |
3712 | }; | |
97ffe757 | 3713 | struct sta_info *sta; |
7528ec57 JB |
3714 | |
3715 | rcu_read_lock(); | |
3716 | ||
97ffe757 JB |
3717 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
3718 | kfree_skb(skb); | |
3719 | skb = ERR_PTR(-EINVAL); | |
3720 | goto out; | |
3721 | } | |
3722 | ||
3723 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
7528ec57 JB |
3724 | if (IS_ERR(skb)) |
3725 | goto out; | |
3726 | ||
3727 | hdr = (void *)skb->data; | |
3728 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
3729 | tx.skb = skb; | |
3730 | ||
3731 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
3732 | rcu_read_unlock(); | |
3733 | kfree_skb(skb); | |
3734 | return ERR_PTR(-EINVAL); | |
3735 | } | |
3736 | ||
3737 | out: | |
3738 | rcu_read_unlock(); | |
3739 | return skb; | |
3740 | } | |
3741 | ||
e2530083 JB |
3742 | /* |
3743 | * ieee80211_clear_tx_pending may not be called in a context where | |
3744 | * it is possible that it packets could come in again. | |
3745 | */ | |
e2ebc74d JB |
3746 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
3747 | { | |
1f98ab7f | 3748 | struct sk_buff *skb; |
2de8e0d9 | 3749 | int i; |
e2ebc74d | 3750 | |
1f98ab7f FF |
3751 | for (i = 0; i < local->hw.queues; i++) { |
3752 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
3753 | ieee80211_free_txskb(&local->hw, skb); | |
3754 | } | |
e2ebc74d JB |
3755 | } |
3756 | ||
7bb45683 JB |
3757 | /* |
3758 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
3759 | * which in this case means re-queued -- take as an indication to stop sending | |
3760 | * more pending frames. | |
3761 | */ | |
cd8ffc80 JB |
3762 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
3763 | struct sk_buff *skb) | |
3764 | { | |
3765 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3766 | struct ieee80211_sub_if_data *sdata; | |
3767 | struct sta_info *sta; | |
3768 | struct ieee80211_hdr *hdr; | |
7bb45683 | 3769 | bool result; |
55de908a | 3770 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 3771 | |
5061b0c2 | 3772 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
3773 | |
3774 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
3775 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
3776 | if (unlikely(!chanctx_conf)) { | |
3777 | dev_kfree_skb(skb); | |
3778 | return true; | |
3779 | } | |
73c4e195 | 3780 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 3781 | result = ieee80211_tx(sdata, NULL, skb, true); |
cd8ffc80 | 3782 | } else { |
252b86c4 JB |
3783 | struct sk_buff_head skbs; |
3784 | ||
3785 | __skb_queue_head_init(&skbs); | |
3786 | __skb_queue_tail(&skbs, skb); | |
3787 | ||
cd8ffc80 | 3788 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 3789 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 3790 | |
74e4dbfd | 3791 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
3792 | } |
3793 | ||
cd8ffc80 JB |
3794 | return result; |
3795 | } | |
3796 | ||
e2530083 | 3797 | /* |
3b8d81e0 | 3798 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 3799 | */ |
e2ebc74d JB |
3800 | void ieee80211_tx_pending(unsigned long data) |
3801 | { | |
3802 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 3803 | unsigned long flags; |
cd8ffc80 | 3804 | int i; |
3b8d81e0 | 3805 | bool txok; |
e2ebc74d | 3806 | |
f0e72851 | 3807 | rcu_read_lock(); |
e2530083 | 3808 | |
3b8d81e0 | 3809 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
3810 | for (i = 0; i < local->hw.queues; i++) { |
3811 | /* | |
3812 | * If queue is stopped by something other than due to pending | |
3813 | * frames, or we have no pending frames, proceed to next queue. | |
3814 | */ | |
3b8d81e0 | 3815 | if (local->queue_stop_reasons[i] || |
2a577d98 | 3816 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 3817 | continue; |
e2530083 | 3818 | |
2a577d98 | 3819 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 3820 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 3821 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 3822 | |
a7bc376c | 3823 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 3824 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
3825 | continue; |
3826 | } | |
3827 | ||
3b8d81e0 JB |
3828 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
3829 | flags); | |
3830 | ||
3831 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
3832 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
3833 | flags); | |
3834 | if (!txok) | |
2a577d98 | 3835 | break; |
e2ebc74d | 3836 | } |
7236fe29 JB |
3837 | |
3838 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 3839 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 3840 | } |
3b8d81e0 | 3841 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 3842 | |
f0e72851 | 3843 | rcu_read_unlock(); |
e2ebc74d JB |
3844 | } |
3845 | ||
3846 | /* functions for drivers to get certain frames */ | |
3847 | ||
eac70c13 | 3848 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3849 | struct ps_data *ps, struct sk_buff *skb, |
3850 | bool is_template) | |
e2ebc74d JB |
3851 | { |
3852 | u8 *pos, *tim; | |
3853 | int aid0 = 0; | |
3854 | int i, have_bits = 0, n1, n2; | |
3855 | ||
3856 | /* Generate bitmap for TIM only if there are any STAs in power save | |
3857 | * mode. */ | |
d012a605 | 3858 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
3859 | /* in the hope that this is faster than |
3860 | * checking byte-for-byte */ | |
f359d3fe | 3861 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 3862 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
3863 | if (!is_template) { |
3864 | if (ps->dtim_count == 0) | |
3865 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
3866 | else | |
3867 | ps->dtim_count--; | |
3868 | } | |
e2ebc74d JB |
3869 | |
3870 | tim = pos = (u8 *) skb_put(skb, 6); | |
3871 | *pos++ = WLAN_EID_TIM; | |
3872 | *pos++ = 4; | |
d012a605 | 3873 | *pos++ = ps->dtim_count; |
8860020e | 3874 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 3875 | |
d012a605 | 3876 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
3877 | aid0 = 1; |
3878 | ||
d012a605 | 3879 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 3880 | |
e2ebc74d JB |
3881 | if (have_bits) { |
3882 | /* Find largest even number N1 so that bits numbered 1 through | |
3883 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
3884 | * (N2 + 1) x 8 through 2007 are 0. */ | |
3885 | n1 = 0; | |
3886 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 3887 | if (ps->tim[i]) { |
e2ebc74d JB |
3888 | n1 = i & 0xfe; |
3889 | break; | |
3890 | } | |
3891 | } | |
3892 | n2 = n1; | |
3893 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 3894 | if (ps->tim[i]) { |
e2ebc74d JB |
3895 | n2 = i; |
3896 | break; | |
3897 | } | |
3898 | } | |
3899 | ||
3900 | /* Bitmap control */ | |
3901 | *pos++ = n1 | aid0; | |
3902 | /* Part Virt Bitmap */ | |
5220da39 | 3903 | skb_put(skb, n2 - n1); |
d012a605 | 3904 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
3905 | |
3906 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
3907 | } else { |
3908 | *pos++ = aid0; /* Bitmap control */ | |
3909 | *pos++ = 0; /* Part Virt Bitmap */ | |
3910 | } | |
e2ebc74d JB |
3911 | } |
3912 | ||
eac70c13 | 3913 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3914 | struct ps_data *ps, struct sk_buff *skb, |
3915 | bool is_template) | |
eac70c13 MP |
3916 | { |
3917 | struct ieee80211_local *local = sdata->local; | |
3918 | ||
3919 | /* | |
3920 | * Not very nice, but we want to allow the driver to call | |
3921 | * ieee80211_beacon_get() as a response to the set_tim() | |
3922 | * callback. That, however, is already invoked under the | |
3923 | * sta_lock to guarantee consistent and race-free update | |
3924 | * of the tim bitmap in mac80211 and the driver. | |
3925 | */ | |
3926 | if (local->tim_in_locked_section) { | |
6ec8c332 | 3927 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 3928 | } else { |
1b91731d | 3929 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 3930 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 3931 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
3932 | } |
3933 | ||
3934 | return 0; | |
3935 | } | |
3936 | ||
1af586c9 AO |
3937 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
3938 | struct beacon_data *beacon) | |
73da7d5b SW |
3939 | { |
3940 | struct probe_resp *resp; | |
cd7760e6 SW |
3941 | u8 *beacon_data; |
3942 | size_t beacon_data_len; | |
0d06d9ba | 3943 | int i; |
af296bdb | 3944 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
3945 | |
3946 | switch (sdata->vif.type) { | |
3947 | case NL80211_IFTYPE_AP: | |
3948 | beacon_data = beacon->tail; | |
3949 | beacon_data_len = beacon->tail_len; | |
3950 | break; | |
3951 | case NL80211_IFTYPE_ADHOC: | |
3952 | beacon_data = beacon->head; | |
3953 | beacon_data_len = beacon->head_len; | |
3954 | break; | |
b8456a14 CYY |
3955 | case NL80211_IFTYPE_MESH_POINT: |
3956 | beacon_data = beacon->head; | |
3957 | beacon_data_len = beacon->head_len; | |
3958 | break; | |
cd7760e6 SW |
3959 | default: |
3960 | return; | |
3961 | } | |
73da7d5b | 3962 | |
af296bdb | 3963 | rcu_read_lock(); |
0d06d9ba | 3964 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 3965 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 3966 | |
af296bdb MK |
3967 | if (beacon->csa_counter_offsets[i]) { |
3968 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
3969 | beacon_data_len)) { | |
0d06d9ba AO |
3970 | rcu_read_unlock(); |
3971 | return; | |
3972 | } | |
af296bdb MK |
3973 | |
3974 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 3975 | } |
af296bdb MK |
3976 | |
3977 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
3978 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 3979 | } |
af296bdb | 3980 | rcu_read_unlock(); |
1af586c9 AO |
3981 | } |
3982 | ||
e996ec2a WD |
3983 | static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon) |
3984 | { | |
3985 | beacon->csa_current_counter--; | |
3986 | ||
3987 | /* the counter should never reach 0 */ | |
3988 | WARN_ON_ONCE(!beacon->csa_current_counter); | |
3989 | ||
3990 | return beacon->csa_current_counter; | |
3991 | } | |
3992 | ||
1af586c9 AO |
3993 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) |
3994 | { | |
3995 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
3996 | struct beacon_data *beacon = NULL; |
3997 | u8 count = 0; | |
0d06d9ba | 3998 | |
af296bdb MK |
3999 | rcu_read_lock(); |
4000 | ||
4001 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
4002 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
4003 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
4004 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
4005 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
4006 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
4007 | ||
4008 | if (!beacon) | |
4009 | goto unlock; | |
4010 | ||
e996ec2a | 4011 | count = __ieee80211_csa_update_counter(beacon); |
1af586c9 | 4012 | |
af296bdb MK |
4013 | unlock: |
4014 | rcu_read_unlock(); | |
4015 | return count; | |
73da7d5b | 4016 | } |
1af586c9 | 4017 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
4018 | |
4019 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
4020 | { | |
4021 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4022 | struct beacon_data *beacon = NULL; | |
4023 | u8 *beacon_data; | |
4024 | size_t beacon_data_len; | |
73da7d5b SW |
4025 | int ret = false; |
4026 | ||
4027 | if (!ieee80211_sdata_running(sdata)) | |
4028 | return false; | |
4029 | ||
4030 | rcu_read_lock(); | |
4031 | if (vif->type == NL80211_IFTYPE_AP) { | |
4032 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
4033 | ||
4034 | beacon = rcu_dereference(ap->beacon); | |
4035 | if (WARN_ON(!beacon || !beacon->tail)) | |
4036 | goto out; | |
4037 | beacon_data = beacon->tail; | |
4038 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
4039 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
4040 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
4041 | ||
4042 | beacon = rcu_dereference(ifibss->presp); | |
4043 | if (!beacon) | |
4044 | goto out; | |
4045 | ||
b8456a14 CYY |
4046 | beacon_data = beacon->head; |
4047 | beacon_data_len = beacon->head_len; | |
4048 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
4049 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
4050 | ||
4051 | beacon = rcu_dereference(ifmsh->beacon); | |
4052 | if (!beacon) | |
4053 | goto out; | |
4054 | ||
cd7760e6 SW |
4055 | beacon_data = beacon->head; |
4056 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
4057 | } else { |
4058 | WARN_ON(1); | |
4059 | goto out; | |
4060 | } | |
4061 | ||
10d78f27 MK |
4062 | if (!beacon->csa_counter_offsets[0]) |
4063 | goto out; | |
4064 | ||
af296bdb | 4065 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
4066 | goto out; |
4067 | ||
af296bdb | 4068 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
4069 | ret = true; |
4070 | out: | |
4071 | rcu_read_unlock(); | |
4072 | ||
4073 | return ret; | |
4074 | } | |
4075 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
4076 | ||
6ec8c332 AO |
4077 | static struct sk_buff * |
4078 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
4079 | struct ieee80211_vif *vif, | |
4080 | struct ieee80211_mutable_offsets *offs, | |
4081 | bool is_template) | |
e2ebc74d JB |
4082 | { |
4083 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 4084 | struct beacon_data *beacon = NULL; |
9d139c81 | 4085 | struct sk_buff *skb = NULL; |
e039fa4a | 4086 | struct ieee80211_tx_info *info; |
e2ebc74d | 4087 | struct ieee80211_sub_if_data *sdata = NULL; |
57fbcce3 | 4088 | enum nl80211_band band; |
e00cfce0 | 4089 | struct ieee80211_tx_rate_control txrc; |
55de908a | 4090 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 4091 | int csa_off_base = 0; |
8318d78a | 4092 | |
5dfdaf58 | 4093 | rcu_read_lock(); |
e2ebc74d | 4094 | |
32bfd35d | 4095 | sdata = vif_to_sdata(vif); |
55de908a | 4096 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 4097 | |
55de908a | 4098 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
4099 | goto out; |
4100 | ||
6ec8c332 AO |
4101 | if (offs) |
4102 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 4103 | |
05c914fe | 4104 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 4105 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 4106 | |
af296bdb | 4107 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 4108 | if (beacon) { |
10d78f27 | 4109 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 | 4110 | if (!is_template) |
e996ec2a | 4111 | __ieee80211_csa_update_counter(beacon); |
1af586c9 AO |
4112 | |
4113 | ieee80211_set_csa(sdata, beacon); | |
4114 | } | |
73da7d5b | 4115 | |
902acc78 JB |
4116 | /* |
4117 | * headroom, head length, | |
4118 | * tail length and maximum TIM length | |
4119 | */ | |
4120 | skb = dev_alloc_skb(local->tx_headroom + | |
4121 | beacon->head_len + | |
70dabeb7 FF |
4122 | beacon->tail_len + 256 + |
4123 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
4124 | if (!skb) |
4125 | goto out; | |
33b64eb2 | 4126 | |
902acc78 JB |
4127 | skb_reserve(skb, local->tx_headroom); |
4128 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
4129 | beacon->head_len); | |
33b64eb2 | 4130 | |
6ec8c332 AO |
4131 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
4132 | is_template); | |
33b64eb2 | 4133 | |
6ec8c332 AO |
4134 | if (offs) { |
4135 | offs->tim_offset = beacon->head_len; | |
4136 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
4137 | |
4138 | /* for AP the csa offsets are from tail */ | |
4139 | csa_off_base = skb->len; | |
6ec8c332 | 4140 | } |
eddcbb94 | 4141 | |
902acc78 JB |
4142 | if (beacon->tail) |
4143 | memcpy(skb_put(skb, beacon->tail_len), | |
4144 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
4145 | } else |
4146 | goto out; | |
05c914fe | 4147 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 4148 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 4149 | struct ieee80211_hdr *hdr; |
33b64eb2 | 4150 | |
af296bdb MK |
4151 | beacon = rcu_dereference(ifibss->presp); |
4152 | if (!beacon) | |
9d139c81 JB |
4153 | goto out; |
4154 | ||
10d78f27 | 4155 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 | 4156 | if (!is_template) |
e996ec2a | 4157 | __ieee80211_csa_update_counter(beacon); |
cd7760e6 | 4158 | |
af296bdb | 4159 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 4160 | } |
cd7760e6 | 4161 | |
af296bdb | 4162 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 4163 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
4164 | if (!skb) |
4165 | goto out; | |
c3ffeab4 | 4166 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
4167 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
4168 | beacon->head_len); | |
9d139c81 JB |
4169 | |
4170 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
4171 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
4172 | IEEE80211_STYPE_BEACON); | |
902acc78 | 4173 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 4174 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 4175 | |
af296bdb MK |
4176 | beacon = rcu_dereference(ifmsh->beacon); |
4177 | if (!beacon) | |
ac1bd846 | 4178 | goto out; |
ac1bd846 | 4179 | |
10d78f27 | 4180 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
4181 | if (!is_template) |
4182 | /* TODO: For mesh csa_counter is in TU, so | |
4183 | * decrementing it by one isn't correct, but | |
4184 | * for now we leave it consistent with overall | |
4185 | * mac80211's behavior. | |
4186 | */ | |
e996ec2a | 4187 | __ieee80211_csa_update_counter(beacon); |
1af586c9 | 4188 | |
af296bdb | 4189 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 4190 | } |
b8456a14 | 4191 | |
dbf498fb | 4192 | if (ifmsh->sync_ops) |
445cd452 | 4193 | ifmsh->sync_ops->adjust_tsf(sdata, beacon); |
dbf498fb | 4194 | |
3b69a9c5 | 4195 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 4196 | beacon->head_len + |
3f52b7e3 | 4197 | 256 + /* TIM IE */ |
af296bdb | 4198 | beacon->tail_len + |
70dabeb7 | 4199 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
4200 | if (!skb) |
4201 | goto out; | |
2b5e1967 | 4202 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
4203 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
4204 | beacon->head_len); | |
6ec8c332 AO |
4205 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
4206 | ||
4207 | if (offs) { | |
af296bdb MK |
4208 | offs->tim_offset = beacon->head_len; |
4209 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
4210 | } |
4211 | ||
af296bdb MK |
4212 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
4213 | beacon->tail_len); | |
9d139c81 JB |
4214 | } else { |
4215 | WARN_ON(1); | |
5dfdaf58 | 4216 | goto out; |
e2ebc74d JB |
4217 | } |
4218 | ||
1af586c9 | 4219 | /* CSA offsets */ |
af296bdb | 4220 | if (offs && beacon) { |
1af586c9 AO |
4221 | int i; |
4222 | ||
4223 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 4224 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
4225 | |
4226 | if (!csa_off) | |
4227 | continue; | |
4228 | ||
4229 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
4230 | } | |
4231 | } | |
4232 | ||
4bf88530 | 4233 | band = chanctx_conf->def.chan->band; |
55de908a | 4234 | |
e039fa4a JB |
4235 | info = IEEE80211_SKB_CB(skb); |
4236 | ||
3b8d81e0 | 4237 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 4238 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 4239 | info->band = band; |
e00cfce0 JM |
4240 | |
4241 | memset(&txrc, 0, sizeof(txrc)); | |
4242 | txrc.hw = hw; | |
e31583cd | 4243 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
4244 | txrc.bss_conf = &sdata->vif.bss_conf; |
4245 | txrc.skb = skb; | |
4246 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 4247 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
8f0729b1 | 4248 | txrc.bss = true; |
e00cfce0 | 4249 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
4250 | |
4251 | info->control.vif = vif; | |
f591fa5d | 4252 | |
a472e71b JL |
4253 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
4254 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
4255 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 4256 | out: |
5dfdaf58 | 4257 | rcu_read_unlock(); |
e2ebc74d | 4258 | return skb; |
6ec8c332 AO |
4259 | |
4260 | } | |
4261 | ||
4262 | struct sk_buff * | |
4263 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
4264 | struct ieee80211_vif *vif, | |
4265 | struct ieee80211_mutable_offsets *offs) | |
4266 | { | |
4267 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
4268 | } | |
4269 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
4270 | ||
4271 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
4272 | struct ieee80211_vif *vif, | |
4273 | u16 *tim_offset, u16 *tim_length) | |
4274 | { | |
4275 | struct ieee80211_mutable_offsets offs = {}; | |
4276 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
35afa588 HS |
4277 | struct sk_buff *copy; |
4278 | struct ieee80211_supported_band *sband; | |
4279 | int shift; | |
4280 | ||
4281 | if (!bcn) | |
4282 | return bcn; | |
6ec8c332 AO |
4283 | |
4284 | if (tim_offset) | |
4285 | *tim_offset = offs.tim_offset; | |
4286 | ||
4287 | if (tim_length) | |
4288 | *tim_length = offs.tim_length; | |
4289 | ||
35afa588 HS |
4290 | if (ieee80211_hw_check(hw, BEACON_TX_STATUS) || |
4291 | !hw_to_local(hw)->monitors) | |
4292 | return bcn; | |
4293 | ||
4294 | /* send a copy to monitor interfaces */ | |
4295 | copy = skb_copy(bcn, GFP_ATOMIC); | |
4296 | if (!copy) | |
4297 | return bcn; | |
4298 | ||
4299 | shift = ieee80211_vif_get_shift(vif); | |
21a8e9dd MSS |
4300 | sband = ieee80211_get_sband(vif_to_sdata(vif)); |
4301 | if (!sband) | |
4302 | return bcn; | |
4303 | ||
35afa588 HS |
4304 | ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false); |
4305 | ||
6ec8c332 | 4306 | return bcn; |
e2ebc74d | 4307 | } |
eddcbb94 | 4308 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 4309 | |
02945821 AN |
4310 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
4311 | struct ieee80211_vif *vif) | |
4312 | { | |
4313 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
4314 | struct sk_buff *skb = NULL; |
4315 | struct probe_resp *presp = NULL; | |
02945821 AN |
4316 | struct ieee80211_hdr *hdr; |
4317 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
4318 | ||
4319 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
4320 | return NULL; | |
4321 | ||
4322 | rcu_read_lock(); | |
4323 | ||
4324 | ap = &sdata->u.ap; | |
4325 | presp = rcu_dereference(ap->probe_resp); | |
4326 | if (!presp) | |
4327 | goto out; | |
4328 | ||
aa7a0080 | 4329 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
4330 | if (!skb) |
4331 | goto out; | |
4332 | ||
aa7a0080 ES |
4333 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
4334 | ||
02945821 AN |
4335 | hdr = (struct ieee80211_hdr *) skb->data; |
4336 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
4337 | ||
4338 | out: | |
4339 | rcu_read_unlock(); | |
4340 | return skb; | |
4341 | } | |
4342 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
4343 | ||
7044cc56 KV |
4344 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
4345 | struct ieee80211_vif *vif) | |
4346 | { | |
4347 | struct ieee80211_sub_if_data *sdata; | |
4348 | struct ieee80211_if_managed *ifmgd; | |
4349 | struct ieee80211_pspoll *pspoll; | |
4350 | struct ieee80211_local *local; | |
4351 | struct sk_buff *skb; | |
4352 | ||
4353 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
4354 | return NULL; | |
4355 | ||
4356 | sdata = vif_to_sdata(vif); | |
4357 | ifmgd = &sdata->u.mgd; | |
4358 | local = sdata->local; | |
4359 | ||
4360 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 4361 | if (!skb) |
7044cc56 | 4362 | return NULL; |
d15b8459 | 4363 | |
7044cc56 KV |
4364 | skb_reserve(skb, local->hw.extra_tx_headroom); |
4365 | ||
4366 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
4367 | memset(pspoll, 0, sizeof(*pspoll)); | |
4368 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
4369 | IEEE80211_STYPE_PSPOLL); | |
4370 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
4371 | ||
4372 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
4373 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
4374 | ||
4375 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
4376 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
4377 | ||
4378 | return skb; | |
4379 | } | |
4380 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
4381 | ||
4382 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
4383 | struct ieee80211_vif *vif) | |
4384 | { | |
4385 | struct ieee80211_hdr_3addr *nullfunc; | |
4386 | struct ieee80211_sub_if_data *sdata; | |
4387 | struct ieee80211_if_managed *ifmgd; | |
4388 | struct ieee80211_local *local; | |
4389 | struct sk_buff *skb; | |
4390 | ||
4391 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
4392 | return NULL; | |
4393 | ||
4394 | sdata = vif_to_sdata(vif); | |
4395 | ifmgd = &sdata->u.mgd; | |
4396 | local = sdata->local; | |
4397 | ||
4398 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 4399 | if (!skb) |
7044cc56 | 4400 | return NULL; |
d15b8459 | 4401 | |
7044cc56 KV |
4402 | skb_reserve(skb, local->hw.extra_tx_headroom); |
4403 | ||
4404 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
4405 | sizeof(*nullfunc)); | |
4406 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
4407 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
4408 | IEEE80211_STYPE_NULLFUNC | | |
4409 | IEEE80211_FCTL_TODS); | |
4410 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
4411 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
4412 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
4413 | ||
4414 | return skb; | |
4415 | } | |
4416 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
4417 | ||
05e54ea6 | 4418 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 4419 | const u8 *src_addr, |
05e54ea6 | 4420 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 4421 | size_t tailroom) |
05e54ea6 | 4422 | { |
a344d677 | 4423 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
4424 | struct ieee80211_hdr_3addr *hdr; |
4425 | struct sk_buff *skb; | |
4426 | size_t ie_ssid_len; | |
4427 | u8 *pos; | |
4428 | ||
05e54ea6 KV |
4429 | ie_ssid_len = 2 + ssid_len; |
4430 | ||
4431 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 4432 | ie_ssid_len + tailroom); |
d15b8459 | 4433 | if (!skb) |
05e54ea6 | 4434 | return NULL; |
05e54ea6 KV |
4435 | |
4436 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
4437 | ||
4438 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
4439 | memset(hdr, 0, sizeof(*hdr)); | |
4440 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
4441 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 4442 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 4443 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 4444 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
4445 | |
4446 | pos = skb_put(skb, ie_ssid_len); | |
4447 | *pos++ = WLAN_EID_SSID; | |
4448 | *pos++ = ssid_len; | |
88c868c4 | 4449 | if (ssid_len) |
05e54ea6 KV |
4450 | memcpy(pos, ssid, ssid_len); |
4451 | pos += ssid_len; | |
4452 | ||
05e54ea6 KV |
4453 | return skb; |
4454 | } | |
4455 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
4456 | ||
32bfd35d | 4457 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 4458 | const void *frame, size_t frame_len, |
e039fa4a | 4459 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
4460 | struct ieee80211_rts *rts) |
4461 | { | |
4462 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 4463 | |
065e9605 HH |
4464 | rts->frame_control = |
4465 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
4466 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
4467 | frame_txctl); | |
e2ebc74d JB |
4468 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
4469 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
4470 | } | |
4471 | EXPORT_SYMBOL(ieee80211_rts_get); | |
4472 | ||
32bfd35d | 4473 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 4474 | const void *frame, size_t frame_len, |
e039fa4a | 4475 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
4476 | struct ieee80211_cts *cts) |
4477 | { | |
4478 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 4479 | |
065e9605 HH |
4480 | cts->frame_control = |
4481 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
4482 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
4483 | frame_len, frame_txctl); | |
e2ebc74d JB |
4484 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
4485 | } | |
4486 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
4487 | ||
4488 | struct sk_buff * | |
32bfd35d | 4489 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 4490 | struct ieee80211_vif *vif) |
e2ebc74d JB |
4491 | { |
4492 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 4493 | struct sk_buff *skb = NULL; |
5cf121c3 | 4494 | struct ieee80211_tx_data tx; |
e2ebc74d | 4495 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 4496 | struct ps_data *ps; |
e039fa4a | 4497 | struct ieee80211_tx_info *info; |
55de908a | 4498 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 4499 | |
32bfd35d | 4500 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 4501 | |
5dfdaf58 | 4502 | rcu_read_lock(); |
55de908a | 4503 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 4504 | |
d012a605 MP |
4505 | if (!chanctx_conf) |
4506 | goto out; | |
4507 | ||
4508 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
4509 | struct beacon_data *beacon = | |
4510 | rcu_dereference(sdata->u.ap.beacon); | |
4511 | ||
4512 | if (!beacon || !beacon->head) | |
4513 | goto out; | |
4514 | ||
4515 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
4516 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
4517 | ps = &sdata->u.mesh.ps; | |
d012a605 | 4518 | } else { |
747cf5e9 | 4519 | goto out; |
d012a605 | 4520 | } |
5dfdaf58 | 4521 | |
d012a605 | 4522 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 4523 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 4524 | |
e2ebc74d | 4525 | while (1) { |
d012a605 | 4526 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 4527 | if (!skb) |
747cf5e9 | 4528 | goto out; |
e2ebc74d JB |
4529 | local->total_ps_buffered--; |
4530 | ||
d012a605 | 4531 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
4532 | struct ieee80211_hdr *hdr = |
4533 | (struct ieee80211_hdr *) skb->data; | |
4534 | /* more buffered multicast/broadcast frames ==> set | |
4535 | * MoreData flag in IEEE 802.11 header to inform PS | |
4536 | * STAs */ | |
4537 | hdr->frame_control |= | |
4538 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
4539 | } | |
4540 | ||
112c44b2 | 4541 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 4542 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 4543 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d | 4544 | break; |
6b07d9ca | 4545 | ieee80211_free_txskb(hw, skb); |
e2ebc74d | 4546 | } |
e039fa4a JB |
4547 | |
4548 | info = IEEE80211_SKB_CB(skb); | |
4549 | ||
5cf121c3 | 4550 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 4551 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 4552 | |
97b045d6 | 4553 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 4554 | skb = NULL; |
97b045d6 | 4555 | out: |
d0709a65 | 4556 | rcu_read_unlock(); |
e2ebc74d JB |
4557 | |
4558 | return skb; | |
4559 | } | |
4560 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 4561 | |
b6da911b LK |
4562 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
4563 | { | |
4564 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
4565 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
4566 | struct ieee80211_local *local = sdata->local; | |
4567 | int ret; | |
4568 | u32 queues; | |
4569 | ||
4570 | lockdep_assert_held(&local->sta_mtx); | |
4571 | ||
4572 | /* only some cases are supported right now */ | |
4573 | switch (sdata->vif.type) { | |
4574 | case NL80211_IFTYPE_STATION: | |
4575 | case NL80211_IFTYPE_AP: | |
4576 | case NL80211_IFTYPE_AP_VLAN: | |
4577 | break; | |
4578 | default: | |
4579 | WARN_ON(1); | |
4580 | return -EINVAL; | |
4581 | } | |
4582 | ||
4583 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
4584 | return -EINVAL; | |
4585 | ||
4586 | if (sta->reserved_tid == tid) { | |
4587 | ret = 0; | |
4588 | goto out; | |
4589 | } | |
4590 | ||
4591 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
4592 | sdata_err(sdata, "TID reservation already active\n"); | |
4593 | ret = -EALREADY; | |
4594 | goto out; | |
4595 | } | |
4596 | ||
4597 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
4598 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
4599 | ||
4600 | synchronize_net(); | |
4601 | ||
4602 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
30686bf7 | 4603 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) { |
b6da911b LK |
4604 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); |
4605 | __ieee80211_stop_tx_ba_session(sta, tid, | |
4606 | AGG_STOP_LOCAL_REQUEST); | |
4607 | } | |
4608 | ||
4609 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 4610 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
4611 | |
4612 | sta->reserved_tid = tid; | |
4613 | ||
4614 | ieee80211_wake_vif_queues(local, sdata, | |
4615 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
4616 | ||
30686bf7 | 4617 | if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) |
b6da911b LK |
4618 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); |
4619 | ||
4620 | ret = 0; | |
4621 | out: | |
4622 | return ret; | |
4623 | } | |
4624 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
4625 | ||
4626 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
4627 | { | |
4628 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
4629 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
4630 | ||
4631 | lockdep_assert_held(&sdata->local->sta_mtx); | |
4632 | ||
4633 | /* only some cases are supported right now */ | |
4634 | switch (sdata->vif.type) { | |
4635 | case NL80211_IFTYPE_STATION: | |
4636 | case NL80211_IFTYPE_AP: | |
4637 | case NL80211_IFTYPE_AP_VLAN: | |
4638 | break; | |
4639 | default: | |
4640 | WARN_ON(1); | |
4641 | return; | |
4642 | } | |
4643 | ||
4644 | if (tid != sta->reserved_tid) { | |
4645 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
4646 | return; | |
4647 | } | |
4648 | ||
4649 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
4650 | } | |
4651 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
4652 | ||
55de908a JB |
4653 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
4654 | struct sk_buff *skb, int tid, | |
57fbcce3 | 4655 | enum nl80211_band band) |
3b8d81e0 | 4656 | { |
731977e9 | 4657 | int ac = ieee80211_ac_from_tid(tid); |
3a25a8c8 | 4658 | |
d57a544d | 4659 | skb_reset_mac_header(skb); |
3a25a8c8 | 4660 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 4661 | skb->priority = tid; |
cf0277e7 | 4662 | |
89afe614 JB |
4663 | skb->dev = sdata->dev; |
4664 | ||
3d34deb6 JB |
4665 | /* |
4666 | * The other path calling ieee80211_xmit is from the tasklet, | |
4667 | * and while we can handle concurrent transmissions locking | |
4668 | * requirements are that we do not come into tx with bhs on. | |
4669 | */ | |
4670 | local_bh_disable(); | |
73c4e195 | 4671 | IEEE80211_SKB_CB(skb)->band = band; |
7c10770f | 4672 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 4673 | local_bh_enable(); |
3b8d81e0 | 4674 | } |