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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
e2ebc74d JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * | |
13 | * Transmit and frame generation functions. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/bitmap.h> | |
d4e46a3d | 21 | #include <linux/rcupdate.h> |
bc3b2d7f | 22 | #include <linux/export.h> |
881d966b | 23 | #include <net/net_namespace.h> |
e2ebc74d JB |
24 | #include <net/ieee80211_radiotap.h> |
25 | #include <net/cfg80211.h> | |
26 | #include <net/mac80211.h> | |
27 | #include <asm/unaligned.h> | |
28 | ||
29 | #include "ieee80211_i.h" | |
24487981 | 30 | #include "driver-ops.h" |
2c8dccc7 | 31 | #include "led.h" |
33b64eb2 | 32 | #include "mesh.h" |
e2ebc74d JB |
33 | #include "wep.h" |
34 | #include "wpa.h" | |
35 | #include "wme.h" | |
2c8dccc7 | 36 | #include "rate.h" |
e2ebc74d | 37 | |
e2ebc74d JB |
38 | /* misc utils */ |
39 | ||
252b86c4 JB |
40 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
41 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 42 | int next_frag_len) |
e2ebc74d | 43 | { |
2103dec1 | 44 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 45 | struct ieee80211_rate *txrate; |
e2ebc74d | 46 | struct ieee80211_local *local = tx->local; |
8318d78a | 47 | struct ieee80211_supported_band *sband; |
358c8d9d | 48 | struct ieee80211_hdr *hdr; |
252b86c4 | 49 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
50 | struct ieee80211_chanctx_conf *chanctx_conf; |
51 | u32 rate_flags = 0; | |
52 | ||
53 | rcu_read_lock(); | |
54 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
55 | if (chanctx_conf) { | |
56 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
57 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
58 | } | |
59 | rcu_read_unlock(); | |
e6a9854b JB |
60 | |
61 | /* assume HW handles this */ | |
336004e2 | 62 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) |
e6a9854b JB |
63 | return 0; |
64 | ||
65 | /* uh huh? */ | |
0d528d85 | 66 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 67 | return 0; |
e2ebc74d | 68 | |
2d56577b | 69 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 70 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 71 | |
e6a9854b | 72 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
73 | |
74 | /* | |
75 | * data and mgmt (except PS Poll): | |
76 | * - during CFP: 32768 | |
77 | * - during contention period: | |
78 | * if addr1 is group address: 0 | |
79 | * if more fragments = 0 and addr1 is individual address: time to | |
80 | * transmit one ACK plus SIFS | |
81 | * if more fragments = 1 and addr1 is individual address: time to | |
82 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
83 | * | |
84 | * IEEE 802.11, 9.6: | |
85 | * - control response frame (CTS or ACK) shall be transmitted using the | |
86 | * same rate as the immediately previous frame in the frame exchange | |
87 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
88 | * at the highest possible rate belonging to the PHY rates in the | |
89 | * BSSBasicRateSet | |
90 | */ | |
252b86c4 | 91 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 92 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 93 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 94 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
95 | * needs to be updated to support duration field calculation. |
96 | * | |
97 | * RTS: time needed to transmit pending data/mgmt frame plus | |
98 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
99 | * CTS: duration of immediately previous RTS minus time | |
100 | * required to transmit CTS and its SIFS | |
101 | * ACK: 0 if immediately previous directed data/mgmt had | |
102 | * more=0, with more=1 duration in ACK frame is duration | |
103 | * from previous frame minus time needed to transmit ACK | |
104 | * and its SIFS | |
105 | * PS Poll: BIT(15) | BIT(14) | aid | |
106 | */ | |
107 | return 0; | |
108 | } | |
109 | ||
110 | /* data/mgmt */ | |
111 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 112 | return cpu_to_le16(32768); |
e2ebc74d JB |
113 | |
114 | if (group_addr) /* Group address as the destination - no ACK */ | |
115 | return 0; | |
116 | ||
117 | /* Individual destination address: | |
118 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
119 | * CTS and ACK frames shall be transmitted using the highest rate in | |
120 | * basic rate set that is less than or equal to the rate of the | |
121 | * immediately previous frame and that is using the same modulation | |
122 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
123 | * the highest mandatory rate of the PHY that is less than or equal to | |
124 | * the rate of the previous frame is used. | |
125 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
126 | */ | |
127 | rate = -1; | |
8318d78a JB |
128 | /* use lowest available if everything fails */ |
129 | mrate = sband->bitrates[0].bitrate; | |
130 | for (i = 0; i < sband->n_bitrates; i++) { | |
131 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 132 | |
8318d78a JB |
133 | if (r->bitrate > txrate->bitrate) |
134 | break; | |
e2ebc74d | 135 | |
2103dec1 SW |
136 | if ((rate_flags & r->flags) != rate_flags) |
137 | continue; | |
138 | ||
bda3933a | 139 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 140 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
141 | |
142 | switch (sband->band) { | |
143 | case IEEE80211_BAND_2GHZ: { | |
144 | u32 flag; | |
145 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
146 | flag = IEEE80211_RATE_MANDATORY_G; | |
147 | else | |
148 | flag = IEEE80211_RATE_MANDATORY_B; | |
149 | if (r->flags & flag) | |
150 | mrate = r->bitrate; | |
151 | break; | |
152 | } | |
153 | case IEEE80211_BAND_5GHZ: | |
154 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
155 | mrate = r->bitrate; | |
156 | break; | |
3a0c52a6 VK |
157 | case IEEE80211_BAND_60GHZ: |
158 | /* TODO, for now fall through */ | |
8318d78a JB |
159 | case IEEE80211_NUM_BANDS: |
160 | WARN_ON(1); | |
161 | break; | |
162 | } | |
e2ebc74d JB |
163 | } |
164 | if (rate == -1) { | |
165 | /* No matching basic rate found; use highest suitable mandatory | |
166 | * PHY rate */ | |
2103dec1 | 167 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
168 | } |
169 | ||
6674f210 SW |
170 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
171 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 172 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
173 | dur = 0; |
174 | else | |
175 | /* Time needed to transmit ACK | |
176 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
177 | * to closest integer */ | |
4ee73f33 | 178 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
179 | tx->sdata->vif.bss_conf.use_short_preamble, |
180 | shift); | |
e2ebc74d JB |
181 | |
182 | if (next_frag_len) { | |
183 | /* Frame is fragmented: duration increases with time needed to | |
184 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
185 | dur *= 2; /* ACK + SIFS */ | |
186 | /* next fragment */ | |
4ee73f33 | 187 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 188 | txrate->bitrate, erp, |
438b61b7 SW |
189 | tx->sdata->vif.bss_conf.use_short_preamble, |
190 | shift); | |
e2ebc74d JB |
191 | } |
192 | ||
03f93c3d | 193 | return cpu_to_le16(dur); |
e2ebc74d JB |
194 | } |
195 | ||
e2ebc74d | 196 | /* tx handlers */ |
5c1b98a5 KV |
197 | static ieee80211_tx_result debug_noinline |
198 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
199 | { | |
200 | struct ieee80211_local *local = tx->local; | |
0c74211d | 201 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
202 | |
203 | /* driver doesn't support power save */ | |
204 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
205 | return TX_CONTINUE; | |
206 | ||
207 | /* hardware does dynamic power save */ | |
208 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
209 | return TX_CONTINUE; | |
210 | ||
211 | /* dynamic power save disabled */ | |
212 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
213 | return TX_CONTINUE; | |
214 | ||
215 | /* we are scanning, don't enable power save */ | |
216 | if (local->scanning) | |
217 | return TX_CONTINUE; | |
218 | ||
219 | if (!local->ps_sdata) | |
220 | return TX_CONTINUE; | |
221 | ||
222 | /* No point if we're going to suspend */ | |
223 | if (local->quiescing) | |
224 | return TX_CONTINUE; | |
225 | ||
0c74211d KV |
226 | /* dynamic ps is supported only in managed mode */ |
227 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
228 | return TX_CONTINUE; | |
229 | ||
230 | ifmgd = &tx->sdata->u.mgd; | |
231 | ||
232 | /* | |
233 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
234 | * u-apsd enabled and the frame is in voip class. This effectively | |
235 | * means that even if all access categories have u-apsd enabled, in | |
236 | * practise u-apsd is only used with the voip ac. This is a | |
237 | * workaround for the case when received voip class packets do not | |
238 | * have correct qos tag for some reason, due the network or the | |
239 | * peer application. | |
240 | * | |
dc41e4d4 | 241 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
242 | * changed via debugfs, user needs to reassociate manually to have |
243 | * everything in sync. | |
244 | */ | |
4875d30d JB |
245 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
246 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
247 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
248 | return TX_CONTINUE; |
249 | ||
5c1b98a5 KV |
250 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
251 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 252 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
253 | IEEE80211_QUEUE_STOP_REASON_PS, |
254 | false); | |
db28569a | 255 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
256 | ieee80211_queue_work(&local->hw, |
257 | &local->dynamic_ps_disable_work); | |
258 | } | |
259 | ||
5db1c07c LC |
260 | /* Don't restart the timer if we're not disassociated */ |
261 | if (!ifmgd->associated) | |
262 | return TX_CONTINUE; | |
263 | ||
5c1b98a5 KV |
264 | mod_timer(&local->dynamic_ps_timer, jiffies + |
265 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
266 | ||
267 | return TX_CONTINUE; | |
268 | } | |
e2ebc74d | 269 | |
d9e8a70f | 270 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 271 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 272 | { |
358c8d9d | 273 | |
e039fa4a | 274 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 275 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 276 | bool assoc = false; |
e2ebc74d | 277 | |
e039fa4a | 278 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 279 | return TX_CONTINUE; |
58d4185e | 280 | |
b23b025f BG |
281 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
282 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
283 | !ieee80211_is_probe_req(hdr->frame_control) && |
284 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
285 | /* | |
286 | * When software scanning only nullfunc frames (to notify | |
287 | * the sleep state to the AP) and probe requests (for the | |
288 | * active scan) are allowed, all other frames should not be | |
289 | * sent and we should not get here, but if we do | |
290 | * nonetheless, drop them to avoid sending them | |
291 | * off-channel. See the link below and | |
292 | * ieee80211_start_scan() for more. | |
293 | * | |
294 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
295 | */ | |
9ae54c84 | 296 | return TX_DROP; |
e2ebc74d | 297 | |
239281f8 RL |
298 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
299 | return TX_CONTINUE; | |
300 | ||
1be7fe8d BJ |
301 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
302 | return TX_CONTINUE; | |
303 | ||
05c914fe | 304 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
305 | return TX_CONTINUE; |
306 | ||
5cf121c3 | 307 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 308 | return TX_CONTINUE; |
e2ebc74d | 309 | |
c2c98fde JB |
310 | if (tx->sta) |
311 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 312 | |
5cf121c3 | 313 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 314 | if (unlikely(!assoc && |
358c8d9d | 315 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 316 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
317 | sdata_info(tx->sdata, |
318 | "dropped data frame to not associated station %pM\n", | |
319 | hdr->addr1); | |
320 | #endif | |
e2ebc74d | 321 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 322 | return TX_DROP; |
e2ebc74d | 323 | } |
29623892 JB |
324 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
325 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 326 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
327 | /* |
328 | * No associated STAs - no need to send multicast | |
329 | * frames. | |
330 | */ | |
331 | return TX_DROP; | |
e2ebc74d JB |
332 | } |
333 | ||
9ae54c84 | 334 | return TX_CONTINUE; |
e2ebc74d JB |
335 | } |
336 | ||
e2ebc74d JB |
337 | /* This function is called whenever the AP is about to exceed the maximum limit |
338 | * of buffered frames for power saving STAs. This situation should not really | |
339 | * happen often during normal operation, so dropping the oldest buffered packet | |
340 | * from each queue should be OK to make some room for new frames. */ | |
341 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
342 | { | |
343 | int total = 0, purged = 0; | |
344 | struct sk_buff *skb; | |
345 | struct ieee80211_sub_if_data *sdata; | |
346 | struct sta_info *sta; | |
347 | ||
79010420 | 348 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
349 | struct ps_data *ps; |
350 | ||
351 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
352 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
353 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
354 | ps = &sdata->u.mesh.ps; | |
d012a605 | 355 | else |
e2ebc74d | 356 | continue; |
d012a605 MP |
357 | |
358 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
359 | if (skb) { |
360 | purged++; | |
361 | dev_kfree_skb(skb); | |
362 | } | |
d012a605 | 363 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 364 | } |
e2ebc74d | 365 | |
948d887d JB |
366 | /* |
367 | * Drop one frame from each station from the lowest-priority | |
368 | * AC that has frames at all. | |
369 | */ | |
d0709a65 | 370 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
371 | int ac; |
372 | ||
373 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
374 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
375 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
376 | if (skb) { | |
377 | purged++; | |
c3e7724b | 378 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
379 | break; |
380 | } | |
e2ebc74d | 381 | } |
e2ebc74d | 382 | } |
d0709a65 | 383 | |
e2ebc74d | 384 | local->total_ps_buffered = total; |
bdcbd8e0 | 385 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
386 | } |
387 | ||
9ae54c84 | 388 | static ieee80211_tx_result |
5cf121c3 | 389 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 390 | { |
e039fa4a | 391 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 392 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 393 | struct ps_data *ps; |
e039fa4a | 394 | |
7d54d0dd JB |
395 | /* |
396 | * broadcast/multicast frame | |
397 | * | |
3f52b7e3 | 398 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
399 | * the frame is buffered to be sent after DTIM beacon frame. |
400 | * This is done either by the hardware or us. | |
401 | */ | |
402 | ||
3f52b7e3 | 403 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
404 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
405 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
406 | if (!tx->sdata->bss) | |
407 | return TX_CONTINUE; | |
408 | ||
409 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
410 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
411 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 412 | } else { |
3e122be0 | 413 | return TX_CONTINUE; |
d012a605 MP |
414 | } |
415 | ||
3e122be0 JB |
416 | |
417 | /* no buffering for ordered frames */ | |
358c8d9d | 418 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 419 | return TX_CONTINUE; |
7d54d0dd | 420 | |
08b99399 JB |
421 | if (ieee80211_is_probe_req(hdr->frame_control)) |
422 | return TX_CONTINUE; | |
423 | ||
f4d57941 JB |
424 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
425 | info->hw_queue = tx->sdata->vif.cab_queue; | |
426 | ||
7d54d0dd | 427 | /* no stations in PS mode */ |
d012a605 | 428 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 429 | return TX_CONTINUE; |
7d54d0dd | 430 | |
62b517cb | 431 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 432 | |
62b517cb JB |
433 | /* device releases frame after DTIM beacon */ |
434 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 435 | return TX_CONTINUE; |
62b1208e | 436 | |
7d54d0dd | 437 | /* buffered in mac80211 */ |
62b1208e JB |
438 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
439 | purge_old_ps_buffers(tx->local); | |
440 | ||
d012a605 | 441 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
442 | ps_dbg(tx->sdata, |
443 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 444 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
445 | } else |
446 | tx->local->total_ps_buffered++; | |
e2ebc74d | 447 | |
d012a605 | 448 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 449 | |
62b1208e | 450 | return TX_QUEUED; |
e2ebc74d JB |
451 | } |
452 | ||
fb733336 JM |
453 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
454 | struct sk_buff *skb) | |
455 | { | |
456 | if (!ieee80211_is_mgmt(fc)) | |
457 | return 0; | |
458 | ||
c2c98fde | 459 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
460 | return 0; |
461 | ||
d8ca16db | 462 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
463 | return 0; |
464 | ||
465 | return 1; | |
466 | } | |
467 | ||
9ae54c84 | 468 | static ieee80211_tx_result |
5cf121c3 | 469 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
470 | { |
471 | struct sta_info *sta = tx->sta; | |
e039fa4a | 472 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 473 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 474 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 475 | |
02f2f1a9 | 476 | if (unlikely(!sta)) |
9ae54c84 | 477 | return TX_CONTINUE; |
e2ebc74d | 478 | |
c2c98fde | 479 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
480 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
481 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 482 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
483 | int ac = skb_get_queue_mapping(tx->skb); |
484 | ||
08b99399 JB |
485 | if (ieee80211_is_mgmt(hdr->frame_control) && |
486 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
487 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
488 | return TX_CONTINUE; | |
489 | } | |
490 | ||
bdcbd8e0 JB |
491 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
492 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
493 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
494 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
495 | |
496 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
497 | spin_lock(&sta->ps_lock); | |
498 | /* | |
499 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
500 | * been queued to pending queue. No reordering can happen, go | |
501 | * ahead and Tx the packet. | |
502 | */ | |
503 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
504 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
505 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
506 | spin_unlock(&sta->ps_lock); |
507 | return TX_CONTINUE; | |
508 | } | |
509 | ||
948d887d JB |
510 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
511 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
512 | ps_dbg(tx->sdata, |
513 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
514 | sta->sta.addr, ac); | |
c3e7724b | 515 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
516 | } else |
517 | tx->local->total_ps_buffered++; | |
004c872e | 518 | |
e039fa4a | 519 | info->control.jiffies = jiffies; |
5061b0c2 | 520 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 521 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
03c8c06f | 522 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 523 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 524 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
525 | |
526 | if (!timer_pending(&local->sta_cleanup)) | |
527 | mod_timer(&local->sta_cleanup, | |
528 | round_jiffies(jiffies + | |
529 | STA_INFO_CLEANUP_INTERVAL)); | |
530 | ||
c868cb35 JB |
531 | /* |
532 | * We queued up some frames, so the TIM bit might | |
533 | * need to be set, recalculate it. | |
534 | */ | |
535 | sta_info_recalc_tim(sta); | |
536 | ||
9ae54c84 | 537 | return TX_QUEUED; |
bdcbd8e0 JB |
538 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
539 | ps_dbg(tx->sdata, | |
540 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
541 | sta->sta.addr); | |
e2ebc74d | 542 | } |
e2ebc74d | 543 | |
9ae54c84 | 544 | return TX_CONTINUE; |
e2ebc74d JB |
545 | } |
546 | ||
d9e8a70f | 547 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 548 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 549 | { |
5cf121c3 | 550 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 551 | return TX_CONTINUE; |
e2ebc74d | 552 | |
5cf121c3 | 553 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
554 | return ieee80211_tx_h_unicast_ps_buf(tx); |
555 | else | |
556 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
557 | } | |
558 | ||
a621fa4d JB |
559 | static ieee80211_tx_result debug_noinline |
560 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
561 | { | |
562 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
563 | ||
af61a165 JB |
564 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
565 | if (tx->sdata->control_port_no_encrypt) | |
566 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
567 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
568 | } | |
a621fa4d JB |
569 | |
570 | return TX_CONTINUE; | |
571 | } | |
572 | ||
d9e8a70f | 573 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 574 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 575 | { |
46e6de15 | 576 | struct ieee80211_key *key; |
e039fa4a | 577 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 578 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 579 | |
3b8d81e0 | 580 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 581 | tx->key = NULL; |
2475b1cc MS |
582 | else if (tx->sta && |
583 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 584 | tx->key = key; |
3cfcf6ac | 585 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 586 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 587 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
588 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
589 | tx->key = key; | |
f7e0104c JB |
590 | else if (is_multicast_ether_addr(hdr->addr1) && |
591 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
592 | tx->key = key; | |
593 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
594 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 595 | tx->key = key; |
e8f4fb7c | 596 | else |
4922f71f | 597 | tx->key = NULL; |
e2ebc74d JB |
598 | |
599 | if (tx->key) { | |
813d7669 JB |
600 | bool skip_hw = false; |
601 | ||
e2ebc74d | 602 | tx->key->tx_rx_count++; |
011bfcc4 | 603 | /* TODO: add threshold stuff again */ |
176e4f84 | 604 | |
97359d12 JB |
605 | switch (tx->key->conf.cipher) { |
606 | case WLAN_CIPHER_SUITE_WEP40: | |
607 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 608 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 609 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
610 | tx->key = NULL; |
611 | break; | |
97359d12 | 612 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 613 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
614 | case WLAN_CIPHER_SUITE_GCMP: |
615 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
616 | if (!ieee80211_is_data_present(hdr->frame_control) && |
617 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
618 | tx->skb)) | |
619 | tx->key = NULL; | |
3b43a187 KV |
620 | else |
621 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 622 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 623 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 624 | break; |
97359d12 | 625 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 626 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
627 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
628 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
629 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
630 | tx->key = NULL; | |
631 | break; | |
176e4f84 | 632 | } |
813d7669 | 633 | |
e54faf29 JB |
634 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
635 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
636 | return TX_DROP; |
637 | ||
f12553eb | 638 | if (!skip_hw && tx->key && |
382b1655 | 639 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 640 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
641 | } |
642 | ||
9ae54c84 | 643 | return TX_CONTINUE; |
e2ebc74d JB |
644 | } |
645 | ||
d9e8a70f | 646 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 647 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 648 | { |
e039fa4a | 649 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
650 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
651 | struct ieee80211_supported_band *sband; | |
a2c40249 | 652 | u32 len; |
e6a9854b | 653 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 654 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 655 | bool assoc = false; |
8318d78a | 656 | |
e6a9854b | 657 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 658 | |
2d56577b | 659 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 660 | |
a2c40249 | 661 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 662 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
663 | |
664 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 665 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
666 | txrc.sband = sband; |
667 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
668 | txrc.skb = tx->skb; | |
669 | txrc.reported_rate.idx = -1; | |
2d56577b | 670 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
671 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
672 | txrc.max_rate_idx = -1; | |
673 | else | |
674 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
675 | |
676 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
677 | txrc.rate_idx_mcs_mask = | |
678 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
679 | ||
8f0729b1 | 680 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 681 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 682 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
683 | |
684 | /* set up RTS protection if desired */ | |
b9a5f8ca | 685 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 686 | txrc.rts = true; |
e2ebc74d | 687 | } |
e2ebc74d | 688 | |
0d528d85 | 689 | info->control.use_rts = txrc.rts; |
991fec09 FF |
690 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
691 | ||
e6a9854b JB |
692 | /* |
693 | * Use short preamble if the BSS can handle it, but not for | |
694 | * management frames unless we know the receiver can handle | |
695 | * that -- the management frame might be to a station that | |
696 | * just wants a probe response. | |
697 | */ | |
698 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
699 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 700 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
701 | txrc.short_preamble = true; |
702 | ||
703 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 704 | |
c2c98fde JB |
705 | if (tx->sta) |
706 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
707 | |
708 | /* | |
709 | * Lets not bother rate control if we're associated and cannot | |
710 | * talk to the sta. This should not happen. | |
711 | */ | |
c2c98fde | 712 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
713 | !rate_usable_index_exists(sband, &tx->sta->sta), |
714 | "%s: Dropped data frame as no usable bitrate found while " | |
715 | "scanning and associated. Target station: " | |
716 | "%pM on %d GHz band\n", | |
47846c9b | 717 | tx->sdata->name, hdr->addr1, |
2d56577b | 718 | info->band ? 5 : 2)) |
b770b43e | 719 | return TX_DROP; |
2e92e6f2 | 720 | |
b770b43e LR |
721 | /* |
722 | * If we're associated with the sta at this point we know we can at | |
723 | * least send the frame at the lowest bit rate. | |
724 | */ | |
e6a9854b JB |
725 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
726 | ||
0d528d85 FF |
727 | if (tx->sta && !info->control.skip_table) |
728 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
729 | ||
730 | if (unlikely(info->control.rates[0].idx < 0)) { | |
731 | if (ratetbl) { | |
732 | struct ieee80211_tx_rate rate = { | |
733 | .idx = ratetbl->rate[0].idx, | |
734 | .flags = ratetbl->rate[0].flags, | |
735 | .count = ratetbl->rate[0].count | |
736 | }; | |
737 | ||
738 | if (ratetbl->rate[0].idx < 0) | |
739 | return TX_DROP; | |
740 | ||
741 | tx->rate = rate; | |
742 | } else { | |
743 | return TX_DROP; | |
744 | } | |
745 | } else { | |
746 | tx->rate = info->control.rates[0]; | |
747 | } | |
e6a9854b | 748 | |
c1ce5a74 | 749 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 750 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
751 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
752 | tx->sta->last_tx_rate = txrc.reported_rate; | |
753 | } else if (tx->sta) | |
e6a9854b | 754 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 755 | |
0d528d85 FF |
756 | if (ratetbl) |
757 | return TX_CONTINUE; | |
758 | ||
e6a9854b JB |
759 | if (unlikely(!info->control.rates[0].count)) |
760 | info->control.rates[0].count = 1; | |
e2ebc74d | 761 | |
9955151d GS |
762 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
763 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
764 | info->control.rates[0].count = 1; | |
765 | ||
e6a9854b JB |
766 | return TX_CONTINUE; |
767 | } | |
768 | ||
f591fa5d JB |
769 | static ieee80211_tx_result debug_noinline |
770 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
771 | { | |
772 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
773 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
774 | u16 *seq; | |
775 | u8 *qc; | |
776 | int tid; | |
777 | ||
25d834e1 JB |
778 | /* |
779 | * Packet injection may want to control the sequence | |
780 | * number, if we have no matching interface then we | |
781 | * neither assign one ourselves nor ask the driver to. | |
782 | */ | |
5061b0c2 | 783 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
784 | return TX_CONTINUE; |
785 | ||
f591fa5d JB |
786 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
787 | return TX_CONTINUE; | |
788 | ||
789 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
790 | return TX_CONTINUE; | |
791 | ||
49a59543 JB |
792 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
793 | return TX_CONTINUE; | |
794 | ||
94778280 JB |
795 | /* |
796 | * Anything but QoS data that has a sequence number field | |
797 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
798 | * counter. QoS data frames with a multicast destination |
799 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 800 | */ |
c4c205f3 BC |
801 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
802 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 803 | /* driver should assign sequence number */ |
f591fa5d | 804 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
805 | /* for pure STA mode without beacons, we can do it */ |
806 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
807 | tx->sdata->sequence_number += 0x10; | |
79c892b8 JB |
808 | if (tx->sta) |
809 | tx->sta->tx_msdu[IEEE80211_NUM_TIDS]++; | |
f591fa5d JB |
810 | return TX_CONTINUE; |
811 | } | |
812 | ||
813 | /* | |
814 | * This should be true for injected/management frames only, for | |
815 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
816 | * above since they are not QoS-data frames. | |
817 | */ | |
818 | if (!tx->sta) | |
819 | return TX_CONTINUE; | |
820 | ||
821 | /* include per-STA, per-TID sequence counter */ | |
822 | ||
823 | qc = ieee80211_get_qos_ctl(hdr); | |
824 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
825 | seq = &tx->sta->tid_seq[tid]; | |
79c892b8 | 826 | tx->sta->tx_msdu[tid]++; |
f591fa5d JB |
827 | |
828 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
829 | ||
830 | /* Increase the sequence number. */ | |
831 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
832 | ||
833 | return TX_CONTINUE; | |
834 | } | |
835 | ||
252b86c4 | 836 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
837 | struct sk_buff *skb, int hdrlen, |
838 | int frag_threshold) | |
839 | { | |
252b86c4 | 840 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 841 | struct ieee80211_tx_info *info; |
252b86c4 | 842 | struct sk_buff *tmp; |
2de8e0d9 JB |
843 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
844 | int pos = hdrlen + per_fragm; | |
845 | int rem = skb->len - hdrlen - per_fragm; | |
846 | ||
847 | if (WARN_ON(rem < 0)) | |
848 | return -EINVAL; | |
849 | ||
252b86c4 JB |
850 | /* first fragment was already added to queue by caller */ |
851 | ||
2de8e0d9 JB |
852 | while (rem) { |
853 | int fraglen = per_fragm; | |
854 | ||
855 | if (fraglen > rem) | |
856 | fraglen = rem; | |
857 | rem -= fraglen; | |
858 | tmp = dev_alloc_skb(local->tx_headroom + | |
859 | frag_threshold + | |
2475b1cc | 860 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
861 | IEEE80211_ENCRYPT_TAILROOM); |
862 | if (!tmp) | |
863 | return -ENOMEM; | |
252b86c4 JB |
864 | |
865 | __skb_queue_tail(&tx->skbs, tmp); | |
866 | ||
2475b1cc MS |
867 | skb_reserve(tmp, |
868 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
869 | ||
2de8e0d9 JB |
870 | /* copy control information */ |
871 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
872 | |
873 | info = IEEE80211_SKB_CB(tmp); | |
874 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
875 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
876 | ||
877 | if (rem) | |
878 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
879 | ||
2de8e0d9 JB |
880 | skb_copy_queue_mapping(tmp, skb); |
881 | tmp->priority = skb->priority; | |
2de8e0d9 | 882 | tmp->dev = skb->dev; |
2de8e0d9 JB |
883 | |
884 | /* copy header and data */ | |
885 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
886 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
887 | ||
888 | pos += fraglen; | |
889 | } | |
890 | ||
252b86c4 | 891 | /* adjust first fragment's length */ |
338f977f | 892 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
893 | return 0; |
894 | } | |
895 | ||
d9e8a70f | 896 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
897 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
898 | { | |
2de8e0d9 JB |
899 | struct sk_buff *skb = tx->skb; |
900 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
901 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 902 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
903 | int hdrlen; |
904 | int fragnum; | |
e2454948 | 905 | |
252b86c4 JB |
906 | /* no matter what happens, tx->skb moves to tx->skbs */ |
907 | __skb_queue_tail(&tx->skbs, skb); | |
908 | tx->skb = NULL; | |
909 | ||
a26eb27a JB |
910 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
911 | return TX_CONTINUE; | |
912 | ||
913 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
914 | return TX_CONTINUE; |
915 | ||
eefce91a JB |
916 | /* |
917 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 918 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 919 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 920 | */ |
8b30b1fe | 921 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
922 | return TX_DROP; |
923 | ||
065e9605 | 924 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 925 | |
a26eb27a | 926 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 927 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 928 | return TX_DROP; |
e6a9854b | 929 | |
2de8e0d9 JB |
930 | /* |
931 | * Now fragment the frame. This will allocate all the fragments and | |
932 | * chain them (using skb as the first fragment) to skb->next. | |
933 | * During transmission, we will remove the successfully transmitted | |
934 | * fragments from this list. When the low-level driver rejects one | |
935 | * of the fragments then we will simply pretend to accept the skb | |
936 | * but store it away as pending. | |
937 | */ | |
252b86c4 | 938 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 939 | return TX_DROP; |
e6a9854b | 940 | |
2de8e0d9 JB |
941 | /* update duration/seq/flags of fragments */ |
942 | fragnum = 0; | |
252b86c4 JB |
943 | |
944 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 945 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 946 | |
2de8e0d9 JB |
947 | hdr = (void *)skb->data; |
948 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 949 | |
252b86c4 | 950 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 951 | hdr->frame_control |= morefrags; |
e6a9854b JB |
952 | /* |
953 | * No multi-rate retries for fragmented frames, that | |
954 | * would completely throw off the NAV at other STAs. | |
955 | */ | |
956 | info->control.rates[1].idx = -1; | |
957 | info->control.rates[2].idx = -1; | |
958 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 959 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 960 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
961 | } else { |
962 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 963 | } |
2de8e0d9 JB |
964 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
965 | fragnum++; | |
252b86c4 | 966 | } |
e2ebc74d | 967 | |
9ae54c84 | 968 | return TX_CONTINUE; |
e2ebc74d JB |
969 | } |
970 | ||
feff1f2f JB |
971 | static ieee80211_tx_result debug_noinline |
972 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
973 | { | |
252b86c4 | 974 | struct sk_buff *skb; |
560d2682 | 975 | int ac = -1; |
feff1f2f JB |
976 | |
977 | if (!tx->sta) | |
978 | return TX_CONTINUE; | |
979 | ||
252b86c4 | 980 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 981 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 982 | tx->sta->tx_fragments++; |
560d2682 | 983 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 984 | } |
560d2682 JB |
985 | if (ac >= 0) |
986 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
987 | |
988 | return TX_CONTINUE; | |
989 | } | |
990 | ||
d9e8a70f | 991 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
992 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
993 | { | |
994 | if (!tx->key) | |
995 | return TX_CONTINUE; | |
996 | ||
97359d12 JB |
997 | switch (tx->key->conf.cipher) { |
998 | case WLAN_CIPHER_SUITE_WEP40: | |
999 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1000 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1001 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1002 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1003 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1004 | return ieee80211_crypto_ccmp_encrypt( |
1005 | tx, IEEE80211_CCMP_MIC_LEN); | |
1006 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1007 | return ieee80211_crypto_ccmp_encrypt( | |
1008 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1009 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1010 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1011 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1012 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1013 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1014 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1015 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1016 | case WLAN_CIPHER_SUITE_GCMP: |
1017 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1018 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1019 | default: |
d32a1028 | 1020 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1021 | } |
1022 | ||
e2454948 JB |
1023 | return TX_DROP; |
1024 | } | |
1025 | ||
d9e8a70f | 1026 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1027 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1028 | { | |
252b86c4 | 1029 | struct sk_buff *skb; |
2de8e0d9 JB |
1030 | struct ieee80211_hdr *hdr; |
1031 | int next_len; | |
1032 | bool group_addr; | |
03f93c3d | 1033 | |
252b86c4 | 1034 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1035 | hdr = (void *) skb->data; |
7e0aae47 JM |
1036 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1037 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1038 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1039 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1040 | next_len = next->len; | |
1041 | } else | |
1042 | next_len = 0; | |
2de8e0d9 | 1043 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1044 | |
2de8e0d9 | 1045 | hdr->duration_id = |
252b86c4 JB |
1046 | ieee80211_duration(tx, skb, group_addr, next_len); |
1047 | } | |
03f93c3d JB |
1048 | |
1049 | return TX_CONTINUE; | |
1050 | } | |
1051 | ||
e2ebc74d JB |
1052 | /* actual transmit path */ |
1053 | ||
a622ab72 JB |
1054 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1055 | struct sk_buff *skb, | |
1056 | struct ieee80211_tx_info *info, | |
1057 | struct tid_ampdu_tx *tid_tx, | |
1058 | int tid) | |
1059 | { | |
1060 | bool queued = false; | |
285fa695 | 1061 | bool reset_agg_timer = false; |
aa454580 | 1062 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1063 | |
1064 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1065 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1066 | reset_agg_timer = true; |
0ab33703 JB |
1067 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1068 | /* | |
1069 | * nothing -- this aggregation session is being started | |
1070 | * but that might still fail with the driver | |
1071 | */ | |
a622ab72 JB |
1072 | } else { |
1073 | spin_lock(&tx->sta->lock); | |
1074 | /* | |
1075 | * Need to re-check now, because we may get here | |
1076 | * | |
1077 | * 1) in the window during which the setup is actually | |
1078 | * already done, but not marked yet because not all | |
1079 | * packets are spliced over to the driver pending | |
1080 | * queue yet -- if this happened we acquire the lock | |
1081 | * either before or after the splice happens, but | |
1082 | * need to recheck which of these cases happened. | |
1083 | * | |
1084 | * 2) during session teardown, if the OPERATIONAL bit | |
1085 | * was cleared due to the teardown but the pointer | |
1086 | * hasn't been assigned NULL yet (or we loaded it | |
1087 | * before it was assigned) -- in this case it may | |
1088 | * now be NULL which means we should just let the | |
1089 | * packet pass through because splicing the frames | |
1090 | * back is already done. | |
1091 | */ | |
40b275b6 | 1092 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1093 | |
1094 | if (!tid_tx) { | |
1095 | /* do nothing, let packet pass through */ | |
1096 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1097 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1098 | reset_agg_timer = true; |
a622ab72 JB |
1099 | } else { |
1100 | queued = true; | |
1101 | info->control.vif = &tx->sdata->vif; | |
1102 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
03c8c06f | 1103 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1104 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1105 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1106 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1107 | } |
1108 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1109 | |
1110 | if (purge_skb) | |
c3e7724b | 1111 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1112 | } |
1113 | ||
285fa695 NM |
1114 | /* reset session timer */ |
1115 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1116 | tid_tx->last_tx = jiffies; |
285fa695 | 1117 | |
a622ab72 JB |
1118 | return queued; |
1119 | } | |
1120 | ||
58d4185e JB |
1121 | /* |
1122 | * initialises @tx | |
7c10770f JB |
1123 | * pass %NULL for the station if unknown, a valid pointer if known |
1124 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1125 | */ |
9ae54c84 | 1126 | static ieee80211_tx_result |
3b8d81e0 JB |
1127 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1128 | struct ieee80211_tx_data *tx, | |
7c10770f | 1129 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1130 | { |
3b8d81e0 | 1131 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1132 | struct ieee80211_hdr *hdr; |
e039fa4a | 1133 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1134 | int tid; |
a622ab72 | 1135 | u8 *qc; |
e2ebc74d JB |
1136 | |
1137 | memset(tx, 0, sizeof(*tx)); | |
1138 | tx->skb = skb; | |
e2ebc74d | 1139 | tx->local = local; |
3b8d81e0 | 1140 | tx->sdata = sdata; |
252b86c4 | 1141 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1142 | |
cd8ffc80 JB |
1143 | /* |
1144 | * If this flag is set to true anywhere, and we get here, | |
1145 | * we are doing the needed processing, so remove the flag | |
1146 | * now. | |
1147 | */ | |
1148 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1149 | ||
58d4185e JB |
1150 | hdr = (struct ieee80211_hdr *) skb->data; |
1151 | ||
7c10770f JB |
1152 | if (likely(sta)) { |
1153 | if (!IS_ERR(sta)) | |
1154 | tx->sta = sta; | |
1155 | } else { | |
1156 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1157 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1158 | if (!tx->sta && sdata->wdev.use_4addr) | |
1159 | return TX_DROP; | |
1160 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1161 | IEEE80211_TX_CTL_INJECTED) || | |
1162 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1163 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1164 | } | |
1165 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1166 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1167 | } |
58d4185e | 1168 | |
cd8ffc80 | 1169 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1170 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1171 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1172 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1173 | struct tid_ampdu_tx *tid_tx; |
1174 | ||
8b30b1fe S |
1175 | qc = ieee80211_get_qos_ctl(hdr); |
1176 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1177 | ||
a622ab72 JB |
1178 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1179 | if (tid_tx) { | |
1180 | bool queued; | |
cd8ffc80 | 1181 | |
a622ab72 JB |
1182 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1183 | tid_tx, tid); | |
1184 | ||
1185 | if (unlikely(queued)) | |
1186 | return TX_QUEUED; | |
1187 | } | |
8b30b1fe S |
1188 | } |
1189 | ||
badffb72 | 1190 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1191 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1192 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1193 | } else |
5cf121c3 | 1194 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1195 | |
a26eb27a JB |
1196 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1197 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1198 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1199 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1200 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1201 | } |
1202 | ||
e2ebc74d | 1203 | if (!tx->sta) |
e039fa4a | 1204 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1205 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1206 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1207 | |
e039fa4a | 1208 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1209 | |
9ae54c84 | 1210 | return TX_CONTINUE; |
e2ebc74d JB |
1211 | } |
1212 | ||
11127e91 JB |
1213 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1214 | struct ieee80211_vif *vif, | |
1215 | struct ieee80211_sta *sta, | |
1216 | struct sk_buff_head *skbs, | |
1217 | bool txpending) | |
e2ebc74d | 1218 | { |
36323f81 | 1219 | struct ieee80211_tx_control control; |
252b86c4 | 1220 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1221 | unsigned long flags; |
e2ebc74d | 1222 | |
252b86c4 | 1223 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1224 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1225 | int q = info->hw_queue; | |
1226 | ||
1227 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1228 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1229 | __skb_unlink(skb, skbs); | |
c3e7724b | 1230 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1231 | continue; |
1232 | } | |
1233 | #endif | |
3b8d81e0 JB |
1234 | |
1235 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1236 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1237 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1238 | if (unlikely(info->flags & |
a7679ed5 SF |
1239 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1240 | if (local->queue_stop_reasons[q] & | |
1241 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1242 | /* | |
1243 | * Drop off-channel frames if queues | |
1244 | * are stopped for any reason other | |
1245 | * than off-channel operation. Never | |
1246 | * queue them. | |
1247 | */ | |
1248 | spin_unlock_irqrestore( | |
1249 | &local->queue_stop_reason_lock, | |
1250 | flags); | |
1251 | ieee80211_purge_tx_queue(&local->hw, | |
1252 | skbs); | |
1253 | return true; | |
1254 | } | |
1255 | } else { | |
1256 | ||
6c17b77b | 1257 | /* |
a7679ed5 SF |
1258 | * Since queue is stopped, queue up frames for |
1259 | * later transmission from the tx-pending | |
1260 | * tasklet when the queue is woken again. | |
6c17b77b | 1261 | */ |
a7679ed5 SF |
1262 | if (txpending) |
1263 | skb_queue_splice_init(skbs, | |
1264 | &local->pending[q]); | |
1265 | else | |
1266 | skb_queue_splice_tail_init(skbs, | |
1267 | &local->pending[q]); | |
1268 | ||
1269 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1270 | flags); | |
1271 | return false; | |
6c17b77b | 1272 | } |
7bb45683 | 1273 | } |
3b8d81e0 | 1274 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1275 | |
11127e91 | 1276 | info->control.vif = vif; |
36323f81 | 1277 | control.sta = sta; |
f0e72851 | 1278 | |
11127e91 | 1279 | __skb_unlink(skb, skbs); |
36323f81 | 1280 | drv_tx(local, &control, skb); |
11127e91 | 1281 | } |
5061b0c2 | 1282 | |
11127e91 JB |
1283 | return true; |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1288 | */ | |
1289 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1290 | struct sk_buff_head *skbs, int led_len, | |
1291 | struct sta_info *sta, bool txpending) | |
1292 | { | |
1293 | struct ieee80211_tx_info *info; | |
1294 | struct ieee80211_sub_if_data *sdata; | |
1295 | struct ieee80211_vif *vif; | |
1296 | struct ieee80211_sta *pubsta; | |
1297 | struct sk_buff *skb; | |
1298 | bool result = true; | |
1299 | __le16 fc; | |
5061b0c2 | 1300 | |
11127e91 JB |
1301 | if (WARN_ON(skb_queue_empty(skbs))) |
1302 | return true; | |
ec25acc4 | 1303 | |
11127e91 JB |
1304 | skb = skb_peek(skbs); |
1305 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1306 | info = IEEE80211_SKB_CB(skb); | |
1307 | sdata = vif_to_sdata(info->control.vif); | |
1308 | if (sta && !sta->uploaded) | |
1309 | sta = NULL; | |
1310 | ||
1311 | if (sta) | |
1312 | pubsta = &sta->sta; | |
1313 | else | |
1314 | pubsta = NULL; | |
1315 | ||
1316 | switch (sdata->vif.type) { | |
1317 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1318 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1319 | vif = &sdata->vif; | |
1320 | break; | |
1321 | } | |
4b6f1dd6 | 1322 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1323 | if (sdata) { |
4b6f1dd6 | 1324 | vif = &sdata->vif; |
3a25a8c8 JB |
1325 | info->hw_queue = |
1326 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1327 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1328 | dev_kfree_skb(skb); | |
1329 | return true; | |
1330 | } else | |
4b6f1dd6 | 1331 | vif = NULL; |
11127e91 JB |
1332 | break; |
1333 | case NL80211_IFTYPE_AP_VLAN: | |
1334 | sdata = container_of(sdata->bss, | |
1335 | struct ieee80211_sub_if_data, u.ap); | |
1336 | /* fall through */ | |
1337 | default: | |
1338 | vif = &sdata->vif; | |
1339 | break; | |
e2ebc74d | 1340 | } |
2de8e0d9 | 1341 | |
cb831b53 JB |
1342 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1343 | txpending); | |
11127e91 | 1344 | |
74e4dbfd | 1345 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1346 | |
4db4e0a1 | 1347 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1348 | |
11127e91 | 1349 | return result; |
e2ebc74d JB |
1350 | } |
1351 | ||
97b045d6 JB |
1352 | /* |
1353 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1354 | * frame was dropped or queued. | |
1355 | */ | |
1356 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1357 | { | |
252b86c4 | 1358 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1359 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1360 | |
9aa4aee3 JB |
1361 | #define CALL_TXH(txh) \ |
1362 | do { \ | |
1363 | res = txh(tx); \ | |
1364 | if (res != TX_CONTINUE) \ | |
1365 | goto txh_done; \ | |
1366 | } while (0) | |
1367 | ||
5c1b98a5 | 1368 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1369 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1370 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1371 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1372 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1373 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1374 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1375 | |
aa5b5492 JB |
1376 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1377 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1378 | tx->skb = NULL; | |
c6fcf6bc | 1379 | goto txh_done; |
aa5b5492 | 1380 | } |
c6fcf6bc JB |
1381 | |
1382 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1383 | CALL_TXH(ieee80211_tx_h_sequence); |
1384 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1385 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1386 | CALL_TXH(ieee80211_tx_h_stats); |
1387 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1388 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1389 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1390 | #undef CALL_TXH |
97b045d6 | 1391 | |
d9e8a70f | 1392 | txh_done: |
97b045d6 | 1393 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1394 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1395 | if (tx->skb) |
c3e7724b | 1396 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1397 | else |
1f98ab7f | 1398 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1399 | return -1; |
1400 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1401 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1402 | return -1; |
1403 | } | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
06be6b14 FF |
1408 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1409 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1410 | int band, struct ieee80211_sta **sta) | |
1411 | { | |
1412 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1413 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1414 | struct ieee80211_tx_data tx; | |
88724a81 | 1415 | struct sk_buff *skb2; |
06be6b14 | 1416 | |
7c10770f | 1417 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1418 | return false; |
1419 | ||
1420 | info->band = band; | |
1421 | info->control.vif = vif; | |
1422 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1423 | ||
1424 | if (invoke_tx_handlers(&tx)) | |
1425 | return false; | |
1426 | ||
1427 | if (sta) { | |
1428 | if (tx.sta) | |
1429 | *sta = &tx.sta->sta; | |
1430 | else | |
1431 | *sta = NULL; | |
1432 | } | |
1433 | ||
88724a81 JB |
1434 | /* this function isn't suitable for fragmented data frames */ |
1435 | skb2 = __skb_dequeue(&tx.skbs); | |
1436 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1437 | ieee80211_free_txskb(hw, skb2); | |
1438 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1439 | return false; | |
1440 | } | |
1441 | ||
06be6b14 FF |
1442 | return true; |
1443 | } | |
1444 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1445 | ||
7bb45683 JB |
1446 | /* |
1447 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1448 | */ | |
1449 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f JB |
1450 | struct sta_info *sta, struct sk_buff *skb, |
1451 | bool txpending) | |
e2ebc74d | 1452 | { |
3b8d81e0 | 1453 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1454 | struct ieee80211_tx_data tx; |
97b045d6 | 1455 | ieee80211_tx_result res_prepare; |
e039fa4a | 1456 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1457 | bool result = true; |
74e4dbfd | 1458 | int led_len; |
e2ebc74d | 1459 | |
e2ebc74d JB |
1460 | if (unlikely(skb->len < 10)) { |
1461 | dev_kfree_skb(skb); | |
7bb45683 | 1462 | return true; |
e2ebc74d JB |
1463 | } |
1464 | ||
58d4185e | 1465 | /* initialises tx */ |
74e4dbfd | 1466 | led_len = skb->len; |
7c10770f | 1467 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1468 | |
cd8ffc80 | 1469 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1470 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1471 | return true; |
cd8ffc80 | 1472 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1473 | return true; |
e2ebc74d JB |
1474 | } |
1475 | ||
3a25a8c8 JB |
1476 | /* set up hw_queue value early */ |
1477 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1478 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1479 | info->hw_queue = | |
1480 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1481 | ||
7bb45683 | 1482 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1483 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1484 | tx.sta, txpending); | |
55de908a | 1485 | |
7bb45683 | 1486 | return result; |
e2ebc74d JB |
1487 | } |
1488 | ||
1489 | /* device xmit handlers */ | |
1490 | ||
3bff1865 | 1491 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1492 | struct sk_buff *skb, |
1493 | int head_need, bool may_encrypt) | |
1494 | { | |
3bff1865 | 1495 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1496 | int tail_need = 0; |
1497 | ||
3bff1865 | 1498 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1499 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1500 | tail_need -= skb_tailroom(skb); | |
1501 | tail_need = max_t(int, tail_need, 0); | |
1502 | } | |
1503 | ||
c70f59a2 IY |
1504 | if (skb_cloned(skb) && |
1505 | (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CLONED_SKBS) || | |
1506 | !skb_clone_writable(skb, ETH_HLEN) || | |
1507 | sdata->crypto_tx_tailroom_needed_cnt)) | |
23c0752a | 1508 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1509 | else if (head_need || tail_need) |
23c0752a | 1510 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1511 | else |
1512 | return 0; | |
23c0752a JB |
1513 | |
1514 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1515 | wiphy_debug(local->hw.wiphy, |
1516 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1517 | return -ENOMEM; |
1518 | } | |
1519 | ||
23c0752a JB |
1520 | return 0; |
1521 | } | |
1522 | ||
7c10770f JB |
1523 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1524 | struct sta_info *sta, struct sk_buff *skb) | |
e2ebc74d | 1525 | { |
3b8d81e0 | 1526 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1527 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1528 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1529 | int headroom; |
23c0752a | 1530 | bool may_encrypt; |
e2ebc74d | 1531 | |
3b8d81e0 | 1532 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1533 | |
3b8d81e0 | 1534 | headroom = local->tx_headroom; |
23c0752a | 1535 | if (may_encrypt) |
2475b1cc | 1536 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1537 | headroom -= skb_headroom(skb); |
1538 | headroom = max_t(int, 0, headroom); | |
1539 | ||
3bff1865 | 1540 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1541 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1542 | return; |
e2ebc74d JB |
1543 | } |
1544 | ||
740c1aa3 | 1545 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1546 | info->control.vif = &sdata->vif; |
e2ebc74d | 1547 | |
3f52b7e3 MP |
1548 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1549 | if (ieee80211_is_data(hdr->frame_control) && | |
1550 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1551 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1552 | return; /* skb queued: don't free */ |
1553 | } else { | |
1554 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1555 | } | |
98aed9fd | 1556 | } |
cca89496 | 1557 | |
2154c81c | 1558 | ieee80211_set_qos_hdr(sdata, skb); |
7c10770f | 1559 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
1560 | } |
1561 | ||
73b9f03a JB |
1562 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1563 | { | |
1564 | struct ieee80211_radiotap_iterator iterator; | |
1565 | struct ieee80211_radiotap_header *rthdr = | |
1566 | (struct ieee80211_radiotap_header *) skb->data; | |
1567 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1568 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1569 | NULL); | |
1570 | u16 txflags; | |
1571 | ||
1572 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1573 | IEEE80211_TX_CTL_DONTFRAG; | |
1574 | ||
1575 | /* | |
1576 | * for every radiotap entry that is present | |
1577 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1578 | * entries present, or -EINVAL on error) | |
1579 | */ | |
1580 | ||
1581 | while (!ret) { | |
1582 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1583 | ||
1584 | if (ret) | |
1585 | continue; | |
1586 | ||
1587 | /* see if this argument is something we can use */ | |
1588 | switch (iterator.this_arg_index) { | |
1589 | /* | |
1590 | * You must take care when dereferencing iterator.this_arg | |
1591 | * for multibyte types... the pointer is not aligned. Use | |
1592 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1593 | * iterator.this_arg for type "type" safely on all arches. | |
1594 | */ | |
1595 | case IEEE80211_RADIOTAP_FLAGS: | |
1596 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1597 | /* | |
1598 | * this indicates that the skb we have been | |
1599 | * handed has the 32-bit FCS CRC at the end... | |
1600 | * we should react to that by snipping it off | |
1601 | * because it will be recomputed and added | |
1602 | * on transmission | |
1603 | */ | |
1604 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1605 | return false; | |
1606 | ||
1607 | skb_trim(skb, skb->len - FCS_LEN); | |
1608 | } | |
1609 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1610 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1611 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1612 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1613 | break; | |
1614 | ||
1615 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1616 | txflags = get_unaligned_le16(iterator.this_arg); | |
1617 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1618 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1619 | break; | |
1620 | ||
1621 | /* | |
1622 | * Please update the file | |
1623 | * Documentation/networking/mac80211-injection.txt | |
1624 | * when parsing new fields here. | |
1625 | */ | |
1626 | ||
1627 | default: | |
1628 | break; | |
1629 | } | |
1630 | } | |
1631 | ||
1632 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1633 | return false; | |
1634 | ||
1635 | /* | |
1636 | * remove the radiotap header | |
1637 | * iterator->_max_length was sanity-checked against | |
1638 | * skb->len by iterator init | |
1639 | */ | |
1640 | skb_pull(skb, iterator._max_length); | |
1641 | ||
1642 | return true; | |
1643 | } | |
1644 | ||
d0cf9c0d SH |
1645 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1646 | struct net_device *dev) | |
e2ebc74d JB |
1647 | { |
1648 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 1649 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
1650 | struct ieee80211_radiotap_header *prthdr = |
1651 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1652 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1653 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1654 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 1655 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 1656 | u16 len_rthdr; |
5d9cf4a5 | 1657 | int hdrlen; |
e2ebc74d | 1658 | |
9b8a74e3 AG |
1659 | /* check for not even having the fixed radiotap header part */ |
1660 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1661 | goto fail; /* too short to be possibly valid */ | |
1662 | ||
1663 | /* is it a header version we can trust to find length from? */ | |
1664 | if (unlikely(prthdr->it_version)) | |
1665 | goto fail; /* only version 0 is supported */ | |
1666 | ||
1667 | /* then there must be a radiotap header with a length we can use */ | |
1668 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1669 | ||
1670 | /* does the skb contain enough to deliver on the alleged length? */ | |
1671 | if (unlikely(skb->len < len_rthdr)) | |
1672 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1673 | |
e2ebc74d JB |
1674 | /* |
1675 | * fix up the pointers accounting for the radiotap | |
1676 | * header still being in there. We are being given | |
1677 | * a precooked IEEE80211 header so no need for | |
1678 | * normal processing | |
1679 | */ | |
9b8a74e3 | 1680 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1681 | /* |
9b8a74e3 AG |
1682 | * these are just fixed to the end of the rt area since we |
1683 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1684 | */ |
9b8a74e3 AG |
1685 | skb_set_network_header(skb, len_rthdr); |
1686 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1687 | |
5d9cf4a5 JB |
1688 | if (skb->len < len_rthdr + 2) |
1689 | goto fail; | |
1690 | ||
1691 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1692 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1693 | ||
1694 | if (skb->len < len_rthdr + hdrlen) | |
1695 | goto fail; | |
1696 | ||
f75f5c6f HS |
1697 | /* |
1698 | * Initialize skb->protocol if the injected frame is a data frame | |
1699 | * carrying a rfc1042 header | |
1700 | */ | |
5d9cf4a5 JB |
1701 | if (ieee80211_is_data(hdr->frame_control) && |
1702 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1703 | u8 *payload = (u8 *)hdr + hdrlen; | |
1704 | ||
b203ca39 | 1705 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1706 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1707 | payload[7]); | |
f75f5c6f HS |
1708 | } |
1709 | ||
3b8d81e0 JB |
1710 | memset(info, 0, sizeof(*info)); |
1711 | ||
5d9cf4a5 | 1712 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1713 | IEEE80211_TX_CTL_INJECTED; |
1714 | ||
1715 | /* process and remove the injection radiotap header */ | |
1716 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1717 | goto fail; | |
5d9cf4a5 JB |
1718 | |
1719 | rcu_read_lock(); | |
1720 | ||
1721 | /* | |
1722 | * We process outgoing injected frames that have a local address | |
1723 | * we handle as though they are non-injected frames. | |
1724 | * This code here isn't entirely correct, the local MAC address | |
1725 | * isn't always enough to find the interface to use; for proper | |
1726 | * VLAN/WDS support we will need a different mechanism (which | |
1727 | * likely isn't going to be monitor interfaces). | |
1728 | */ | |
1729 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1730 | ||
1731 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1732 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1733 | continue; | |
1734 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1735 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1736 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1737 | continue; | |
b203ca39 | 1738 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1739 | sdata = tmp_sdata; |
1740 | break; | |
1741 | } | |
1742 | } | |
7351c6bd | 1743 | |
55de908a JB |
1744 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1745 | if (!chanctx_conf) { | |
1746 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1747 | if (tmp_sdata) | |
1748 | chanctx_conf = | |
1749 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1750 | } | |
55de908a | 1751 | |
b4a7ff75 | 1752 | if (chanctx_conf) |
b4932836 | 1753 | chandef = &chanctx_conf->def; |
b4a7ff75 | 1754 | else if (!local->use_chanctx) |
b4932836 | 1755 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
1756 | else |
1757 | goto fail_rcu; | |
55de908a JB |
1758 | |
1759 | /* | |
1760 | * Frame injection is not allowed if beaconing is not allowed | |
1761 | * or if we need radar detection. Beaconing is usually not allowed when | |
1762 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1763 | * Passive scan is also used in world regulatory domains where | |
1764 | * your country is not known and as such it should be treated as | |
1765 | * NO TX unless the channel is explicitly allowed in which case | |
1766 | * your current regulatory domain would not have the passive scan | |
1767 | * flag. | |
1768 | * | |
1769 | * Since AP mode uses monitor interfaces to inject/TX management | |
1770 | * frames we can make AP mode the exception to this rule once it | |
1771 | * supports radar detection as its implementation can deal with | |
1772 | * radar detection by itself. We can do that later by adding a | |
1773 | * monitor flag interfaces used for AP support. | |
1774 | */ | |
b4932836 JD |
1775 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
1776 | sdata->vif.type)) | |
55de908a JB |
1777 | goto fail_rcu; |
1778 | ||
73c4e195 | 1779 | info->band = chandef->chan->band; |
7c10770f | 1780 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
1781 | rcu_read_unlock(); |
1782 | ||
e2ebc74d | 1783 | return NETDEV_TX_OK; |
9b8a74e3 | 1784 | |
55de908a JB |
1785 | fail_rcu: |
1786 | rcu_read_unlock(); | |
9b8a74e3 AG |
1787 | fail: |
1788 | dev_kfree_skb(skb); | |
1789 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1790 | } |
1791 | ||
1792 | /** | |
4c9451ed JB |
1793 | * ieee80211_build_hdr - build 802.11 header in the given frame |
1794 | * @sdata: virtual interface to build the header for | |
1795 | * @skb: the skb to build the header in | |
24d342c5 | 1796 | * @info_flags: skb flags to set |
e2ebc74d | 1797 | * |
4c9451ed JB |
1798 | * This function takes the skb with 802.3 header and reformats the header to |
1799 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
1800 | * being transmitted on. | |
1801 | * | |
1802 | * Note that this function also takes care of the TX status request and | |
1803 | * potential unsharing of the SKB - this needs to be interleaved with the | |
1804 | * header building. | |
e2ebc74d | 1805 | * |
4c9451ed JB |
1806 | * The function requires the read-side RCU lock held |
1807 | * | |
1808 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 1809 | */ |
4c9451ed | 1810 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f JB |
1811 | struct sk_buff *skb, u32 info_flags, |
1812 | struct sta_info **sta_out) | |
e2ebc74d | 1813 | { |
133b8226 | 1814 | struct ieee80211_local *local = sdata->local; |
489ee919 | 1815 | struct ieee80211_tx_info *info; |
dcf33963 | 1816 | int head_need; |
065e9605 HH |
1817 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1818 | __le16 fc; | |
e2ebc74d | 1819 | struct ieee80211_hdr hdr; |
ff67bb86 | 1820 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1821 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1822 | const u8 *encaps_data; |
1823 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1824 | int nh_pos, h_pos; |
f14543ee | 1825 | struct sta_info *sta = NULL; |
c2c98fde | 1826 | bool wme_sta = false, authorized = false, tdls_auth = false; |
9deba04d | 1827 | bool tdls_peer = false, tdls_setup_frame = false; |
a729cff8 | 1828 | bool multicast; |
5041006c | 1829 | bool have_station = false; |
a729cff8 | 1830 | u16 info_id = 0; |
55de908a JB |
1831 | struct ieee80211_chanctx_conf *chanctx_conf; |
1832 | struct ieee80211_sub_if_data *ap_sdata; | |
1833 | enum ieee80211_band band; | |
4c9451ed | 1834 | int ret; |
e2ebc74d | 1835 | |
e2ebc74d JB |
1836 | /* convert Ethernet header to proper 802.11 header (based on |
1837 | * operation mode) */ | |
1838 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1839 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1840 | |
51fb61e7 | 1841 | switch (sdata->vif.type) { |
05c914fe | 1842 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1843 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1844 | if (sta) { |
1845 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1846 | /* RA TA DA SA */ | |
1847 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1848 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1849 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1850 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1851 | hdrlen = 30; | |
c2c98fde | 1852 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 1853 | wme_sta = sta->sta.wme; |
5041006c | 1854 | have_station = true; |
7c10770f | 1855 | *sta_out = sta; |
a8d15ff0 JB |
1856 | } else if (sdata->wdev.use_4addr) { |
1857 | ret = -ENOLINK; | |
1858 | goto free; | |
f14543ee | 1859 | } |
55de908a JB |
1860 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1861 | u.ap); | |
1862 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
1863 | if (!chanctx_conf) { |
1864 | ret = -ENOTCONN; | |
1865 | goto free; | |
1866 | } | |
4bf88530 | 1867 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1868 | if (sta) |
1869 | break; | |
1870 | /* fall through */ | |
1871 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1872 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1873 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
1874 | if (!chanctx_conf) { |
1875 | ret = -ENOTCONN; | |
1876 | goto free; | |
1877 | } | |
065e9605 | 1878 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1879 | /* DA BSSID SA */ |
1880 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1881 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1882 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1883 | hdrlen = 24; | |
4bf88530 | 1884 | band = chanctx_conf->def.chan->band; |
cf966838 | 1885 | break; |
05c914fe | 1886 | case NL80211_IFTYPE_WDS: |
065e9605 | 1887 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1888 | /* RA TA DA SA */ |
1889 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1890 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1891 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1892 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1893 | hdrlen = 30; | |
55de908a JB |
1894 | /* |
1895 | * This is the exception! WDS style interfaces are prohibited | |
1896 | * when channel contexts are in used so this must be valid | |
1897 | */ | |
675a0b04 | 1898 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 1899 | break; |
33b64eb2 | 1900 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1901 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 1902 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1903 | struct sta_info *next_hop; |
1904 | bool mpp_lookup = true; | |
1905 | ||
bf7cd94d | 1906 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1907 | if (mpath) { |
1908 | mpp_lookup = false; | |
1909 | next_hop = rcu_dereference(mpath->next_hop); | |
1910 | if (!next_hop || | |
1911 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1912 | MESH_PATH_RESOLVING))) | |
1913 | mpp_lookup = true; | |
1914 | } | |
1915 | ||
1916 | if (mpp_lookup) | |
bf7cd94d | 1917 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1918 | |
1919 | if (mppath && mpath) | |
1920 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1921 | } |
79617dee | 1922 | |
f76b57b4 | 1923 | /* |
9d52501b JF |
1924 | * Use address extension if it is a packet from |
1925 | * another interface or if we know the destination | |
1926 | * is being proxied by a portal (i.e. portal address | |
1927 | * differs from proxied address) | |
f76b57b4 | 1928 | */ |
b203ca39 JP |
1929 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1930 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1931 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1932 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1933 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1934 | NULL, NULL); | |
79617dee | 1935 | } else { |
27f01124 TP |
1936 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1937 | * For unicast with unknown forwarding information, | |
1938 | * destination might be in the MBSS or if that fails | |
1939 | * forwarded to another mesh gate. In either case | |
1940 | * resolution will be handled in ieee80211_xmit(), so | |
1941 | * leave the original DA. This also works for mcast */ | |
1942 | const u8 *mesh_da = skb->data; | |
1943 | ||
1944 | if (mppath) | |
1945 | mesh_da = mppath->mpp; | |
1946 | else if (mpath) | |
1947 | mesh_da = mpath->dst; | |
79617dee | 1948 | |
3c5772a5 | 1949 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1950 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1951 | if (is_multicast_ether_addr(mesh_da)) |
1952 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1953 | meshhdrlen = ieee80211_new_mesh_header( |
1954 | sdata, &mesh_hdr, | |
1955 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1956 | else |
27f01124 | 1957 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1958 | meshhdrlen = ieee80211_new_mesh_header( |
1959 | sdata, &mesh_hdr, skb->data, | |
1960 | skb->data + ETH_ALEN); | |
79617dee | 1961 | |
79617dee | 1962 | } |
55de908a | 1963 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
1964 | if (!chanctx_conf) { |
1965 | ret = -ENOTCONN; | |
1966 | goto free; | |
1967 | } | |
4bf88530 | 1968 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1969 | break; |
1970 | #endif | |
05c914fe | 1971 | case NL80211_IFTYPE_STATION: |
941c93cd | 1972 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
941c93cd | 1973 | sta = sta_info_get(sdata, skb->data); |
c2c98fde | 1974 | if (sta) { |
c2c98fde | 1975 | tdls_peer = test_sta_flag(sta, |
9deba04d | 1976 | WLAN_STA_TDLS_PEER); |
c2c98fde JB |
1977 | tdls_auth = test_sta_flag(sta, |
1978 | WLAN_STA_TDLS_PEER_AUTH); | |
1979 | } | |
941c93cd | 1980 | |
9deba04d AN |
1981 | if (tdls_peer) |
1982 | tdls_setup_frame = | |
1983 | ethertype == ETH_P_TDLS && | |
1984 | skb->len > 14 && | |
1985 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
941c93cd AN |
1986 | } |
1987 | ||
9deba04d AN |
1988 | /* |
1989 | * TDLS link during setup - throw out frames to peer. We allow | |
1990 | * TDLS-setup frames to unauthorized peers for the special case | |
1991 | * of a link teardown after a TDLS sta is removed due to being | |
1992 | * unreachable. | |
1993 | */ | |
4c9451ed JB |
1994 | if (tdls_peer && !tdls_auth && !tdls_setup_frame) { |
1995 | ret = -EINVAL; | |
1996 | goto free; | |
1997 | } | |
941c93cd | 1998 | |
9deba04d AN |
1999 | /* send direct packets to authorized TDLS peers */ |
2000 | if (tdls_peer && tdls_auth) { | |
941c93cd AN |
2001 | /* DA SA BSSID */ |
2002 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2003 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2004 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2005 | hdrlen = 24; | |
5041006c JB |
2006 | have_station = true; |
2007 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2008 | wme_sta = sta->sta.wme; | |
7c10770f | 2009 | *sta_out = sta; |
941c93cd AN |
2010 | } else if (sdata->u.mgd.use_4addr && |
2011 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2012 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2013 | IEEE80211_FCTL_TODS); | |
f14543ee | 2014 | /* RA TA DA SA */ |
941c93cd | 2015 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2016 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2017 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2018 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2019 | hdrlen = 30; | |
2020 | } else { | |
2021 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2022 | /* BSSID SA DA */ | |
941c93cd | 2023 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2024 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2025 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2026 | hdrlen = 24; | |
2027 | } | |
55de908a | 2028 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2029 | if (!chanctx_conf) { |
2030 | ret = -ENOTCONN; | |
2031 | goto free; | |
2032 | } | |
4bf88530 | 2033 | band = chanctx_conf->def.chan->band; |
cf966838 | 2034 | break; |
239281f8 RL |
2035 | case NL80211_IFTYPE_OCB: |
2036 | /* DA SA BSSID */ | |
2037 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2038 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2039 | eth_broadcast_addr(hdr.addr3); | |
2040 | hdrlen = 24; | |
2041 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2042 | if (!chanctx_conf) { |
2043 | ret = -ENOTCONN; | |
2044 | goto free; | |
2045 | } | |
239281f8 RL |
2046 | band = chanctx_conf->def.chan->band; |
2047 | break; | |
05c914fe | 2048 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2049 | /* DA SA BSSID */ |
2050 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2051 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2052 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2053 | hdrlen = 24; |
55de908a | 2054 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2055 | if (!chanctx_conf) { |
2056 | ret = -ENOTCONN; | |
2057 | goto free; | |
2058 | } | |
4bf88530 | 2059 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2060 | break; |
2061 | default: | |
4c9451ed JB |
2062 | ret = -EINVAL; |
2063 | goto free; | |
e2ebc74d JB |
2064 | } |
2065 | ||
7d185b8b | 2066 | /* |
e33f5569 JB |
2067 | * There's no need to try to look up the destination station |
2068 | * if it is a multicast address. In mesh, there's no need to | |
2069 | * look up the station at all as it always must be QoS capable | |
2070 | * and mesh mode checks authorization later. | |
7d185b8b | 2071 | */ |
a729cff8 | 2072 | multicast = is_multicast_ether_addr(hdr.addr1); |
7c10770f JB |
2073 | if (multicast) { |
2074 | *sta_out = ERR_PTR(-ENOENT); | |
2075 | } else if (!have_station && !ieee80211_vif_is_mesh(&sdata->vif)) { | |
2076 | if (sdata->control_port_protocol == skb->protocol) | |
2077 | sta = sta_info_get_bss(sdata, hdr.addr1); | |
2078 | else | |
2079 | sta = sta_info_get(sdata, hdr.addr1); | |
c2c98fde JB |
2080 | if (sta) { |
2081 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
a74a8c84 | 2082 | wme_sta = sta->sta.wme; |
c2c98fde | 2083 | } |
7c10770f | 2084 | *sta_out = sta ?: ERR_PTR(-ENOENT); |
e2ebc74d JB |
2085 | } |
2086 | ||
4777be41 JC |
2087 | /* For mesh, the use of the QoS header is mandatory */ |
2088 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 2089 | wme_sta = true; |
4777be41 | 2090 | |
3434fbd3 | 2091 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 2092 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 2093 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2094 | hdrlen += 2; |
2095 | } | |
2096 | ||
2097 | /* | |
238814fd JB |
2098 | * Drop unicast frames to unauthorised stations unless they are |
2099 | * EAPOL frames from the local station. | |
ce3edf6d | 2100 | */ |
55182e4a | 2101 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2102 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2103 | !multicast && !authorized && |
55182e4a | 2104 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2105 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2106 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2107 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2108 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2109 | #endif |
2110 | ||
2111 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2112 | ||
4c9451ed JB |
2113 | ret = -EPERM; |
2114 | goto free; | |
ce3edf6d JB |
2115 | } |
2116 | ||
a729cff8 JB |
2117 | if (unlikely(!multicast && skb->sk && |
2118 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2119 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2120 | |
bf7fa551 | 2121 | if (ack_skb) { |
a729cff8 | 2122 | unsigned long flags; |
9475af6e | 2123 | int id; |
a729cff8 JB |
2124 | |
2125 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2126 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2127 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2128 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2129 | ||
9475af6e | 2130 | if (id >= 0) { |
a729cff8 JB |
2131 | info_id = id; |
2132 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2133 | } else { |
bf7fa551 | 2134 | kfree_skb(ack_skb); |
a729cff8 | 2135 | } |
a729cff8 JB |
2136 | } |
2137 | } | |
2138 | ||
7e244707 HS |
2139 | /* |
2140 | * If the skb is shared we need to obtain our own copy. | |
2141 | */ | |
2142 | if (skb_shared(skb)) { | |
a729cff8 JB |
2143 | struct sk_buff *tmp_skb = skb; |
2144 | ||
2145 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2146 | WARN_ON(info_id); | |
2147 | ||
f8a0a781 | 2148 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2149 | kfree_skb(tmp_skb); |
2150 | ||
4c9451ed JB |
2151 | if (!skb) { |
2152 | ret = -ENOMEM; | |
2153 | goto free; | |
2154 | } | |
7e244707 HS |
2155 | } |
2156 | ||
065e9605 | 2157 | hdr.frame_control = fc; |
e2ebc74d JB |
2158 | hdr.duration_id = 0; |
2159 | hdr.seq_ctrl = 0; | |
2160 | ||
2161 | skip_header_bytes = ETH_HLEN; | |
2162 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2163 | encaps_data = bridge_tunnel_header; | |
2164 | encaps_len = sizeof(bridge_tunnel_header); | |
2165 | skip_header_bytes -= 2; | |
e5c5d22e | 2166 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2167 | encaps_data = rfc1042_header; |
2168 | encaps_len = sizeof(rfc1042_header); | |
2169 | skip_header_bytes -= 2; | |
2170 | } else { | |
2171 | encaps_data = NULL; | |
2172 | encaps_len = 0; | |
2173 | } | |
2174 | ||
7e244707 HS |
2175 | nh_pos = skb_network_header(skb) - skb->data; |
2176 | h_pos = skb_transport_header(skb) - skb->data; | |
2177 | ||
e2ebc74d JB |
2178 | skb_pull(skb, skip_header_bytes); |
2179 | nh_pos -= skip_header_bytes; | |
2180 | h_pos -= skip_header_bytes; | |
2181 | ||
23c0752a | 2182 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2183 | |
23c0752a JB |
2184 | /* |
2185 | * So we need to modify the skb header and hence need a copy of | |
2186 | * that. The head_need variable above doesn't, so far, include | |
2187 | * the needed header space that we don't need right away. If we | |
2188 | * can, then we don't reallocate right now but only after the | |
2189 | * frame arrives at the master device (if it does...) | |
2190 | * | |
2191 | * If we cannot, however, then we will reallocate to include all | |
2192 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2193 | * make it big enough for everything we may ever need. | |
2194 | */ | |
e2ebc74d | 2195 | |
3a5be7d4 | 2196 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2197 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2198 | head_need += local->tx_headroom; |
2199 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2200 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2201 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2202 | skb = NULL; |
4c9451ed | 2203 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2204 | } |
e2ebc74d JB |
2205 | } |
2206 | ||
2207 | if (encaps_data) { | |
2208 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2209 | nh_pos += encaps_len; | |
2210 | h_pos += encaps_len; | |
2211 | } | |
c29b9b9b | 2212 | |
e4ab7eb0 | 2213 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2214 | if (meshhdrlen > 0) { |
2215 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2216 | nh_pos += meshhdrlen; | |
2217 | h_pos += meshhdrlen; | |
2218 | } | |
e4ab7eb0 | 2219 | #endif |
33b64eb2 | 2220 | |
065e9605 | 2221 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2222 | __le16 *qos_control; |
2223 | ||
f359d3fe | 2224 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2225 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2226 | /* | |
2227 | * Maybe we could actually set some fields here, for now just | |
2228 | * initialise to zero to indicate no special operation. | |
2229 | */ | |
2230 | *qos_control = 0; | |
2231 | } else | |
2232 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2233 | ||
e2ebc74d JB |
2234 | nh_pos += hdrlen; |
2235 | h_pos += hdrlen; | |
2236 | ||
e2ebc74d JB |
2237 | /* Update skb pointers to various headers since this modified frame |
2238 | * is going to go through Linux networking code that may potentially | |
2239 | * need things like pointer to IP header. */ | |
2240 | skb_set_mac_header(skb, 0); | |
2241 | skb_set_network_header(skb, nh_pos); | |
2242 | skb_set_transport_header(skb, h_pos); | |
2243 | ||
489ee919 | 2244 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2245 | memset(info, 0, sizeof(*info)); |
2246 | ||
a729cff8 JB |
2247 | info->flags = info_flags; |
2248 | info->ack_frame_id = info_id; | |
73c4e195 | 2249 | info->band = band; |
a729cff8 | 2250 | |
4c9451ed JB |
2251 | return skb; |
2252 | free: | |
2253 | kfree_skb(skb); | |
2254 | return ERR_PTR(ret); | |
2255 | } | |
2256 | ||
2257 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, | |
2258 | struct net_device *dev, | |
2259 | u32 info_flags) | |
2260 | { | |
2261 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
7c10770f | 2262 | struct sta_info *sta = NULL; |
4c9451ed JB |
2263 | |
2264 | if (unlikely(skb->len < ETH_HLEN)) { | |
2265 | kfree_skb(skb); | |
2266 | return; | |
2267 | } | |
2268 | ||
2269 | rcu_read_lock(); | |
e2ebc74d | 2270 | |
7c10770f | 2271 | skb = ieee80211_build_hdr(sdata, skb, info_flags, &sta); |
4c9451ed JB |
2272 | if (IS_ERR(skb)) |
2273 | goto out; | |
2274 | ||
2275 | dev->stats.tx_packets++; | |
2276 | dev->stats.tx_bytes += skb->len; | |
2277 | dev->trans_start = jiffies; | |
e2ebc74d | 2278 | |
7c10770f | 2279 | ieee80211_xmit(sdata, sta, skb); |
4c9451ed | 2280 | out: |
55de908a | 2281 | rcu_read_unlock(); |
e2ebc74d JB |
2282 | } |
2283 | ||
4c9451ed JB |
2284 | /** |
2285 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
2286 | * @skb: packet to be sent | |
2287 | * @dev: incoming interface | |
2288 | * | |
2289 | * On failure skb will be freed. | |
2290 | */ | |
24d342c5 LK |
2291 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
2292 | struct net_device *dev) | |
2293 | { | |
2294 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
2295 | return NETDEV_TX_OK; | |
2296 | } | |
e2ebc74d | 2297 | |
7528ec57 JB |
2298 | struct sk_buff * |
2299 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
2300 | struct sk_buff *skb, u32 info_flags) | |
2301 | { | |
2302 | struct ieee80211_hdr *hdr; | |
2303 | struct ieee80211_tx_data tx = { | |
2304 | .local = sdata->local, | |
2305 | .sdata = sdata, | |
2306 | }; | |
7c10770f | 2307 | struct sta_info *sta_ignore; |
7528ec57 JB |
2308 | |
2309 | rcu_read_lock(); | |
2310 | ||
7c10770f | 2311 | skb = ieee80211_build_hdr(sdata, skb, info_flags, &sta_ignore); |
7528ec57 JB |
2312 | if (IS_ERR(skb)) |
2313 | goto out; | |
2314 | ||
2315 | hdr = (void *)skb->data; | |
2316 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
2317 | tx.skb = skb; | |
2318 | ||
2319 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
2320 | rcu_read_unlock(); | |
2321 | kfree_skb(skb); | |
2322 | return ERR_PTR(-EINVAL); | |
2323 | } | |
2324 | ||
2325 | out: | |
2326 | rcu_read_unlock(); | |
2327 | return skb; | |
2328 | } | |
2329 | ||
e2530083 JB |
2330 | /* |
2331 | * ieee80211_clear_tx_pending may not be called in a context where | |
2332 | * it is possible that it packets could come in again. | |
2333 | */ | |
e2ebc74d JB |
2334 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2335 | { | |
1f98ab7f | 2336 | struct sk_buff *skb; |
2de8e0d9 | 2337 | int i; |
e2ebc74d | 2338 | |
1f98ab7f FF |
2339 | for (i = 0; i < local->hw.queues; i++) { |
2340 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2341 | ieee80211_free_txskb(&local->hw, skb); | |
2342 | } | |
e2ebc74d JB |
2343 | } |
2344 | ||
7bb45683 JB |
2345 | /* |
2346 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2347 | * which in this case means re-queued -- take as an indication to stop sending | |
2348 | * more pending frames. | |
2349 | */ | |
cd8ffc80 JB |
2350 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2351 | struct sk_buff *skb) | |
2352 | { | |
2353 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2354 | struct ieee80211_sub_if_data *sdata; | |
2355 | struct sta_info *sta; | |
2356 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2357 | bool result; |
55de908a | 2358 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2359 | |
5061b0c2 | 2360 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2361 | |
2362 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2363 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2364 | if (unlikely(!chanctx_conf)) { | |
2365 | dev_kfree_skb(skb); | |
2366 | return true; | |
2367 | } | |
73c4e195 | 2368 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 2369 | result = ieee80211_tx(sdata, NULL, skb, true); |
cd8ffc80 | 2370 | } else { |
252b86c4 JB |
2371 | struct sk_buff_head skbs; |
2372 | ||
2373 | __skb_queue_head_init(&skbs); | |
2374 | __skb_queue_tail(&skbs, skb); | |
2375 | ||
cd8ffc80 | 2376 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2377 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2378 | |
74e4dbfd | 2379 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2380 | } |
2381 | ||
cd8ffc80 JB |
2382 | return result; |
2383 | } | |
2384 | ||
e2530083 | 2385 | /* |
3b8d81e0 | 2386 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2387 | */ |
e2ebc74d JB |
2388 | void ieee80211_tx_pending(unsigned long data) |
2389 | { | |
2390 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2391 | unsigned long flags; |
cd8ffc80 | 2392 | int i; |
3b8d81e0 | 2393 | bool txok; |
e2ebc74d | 2394 | |
f0e72851 | 2395 | rcu_read_lock(); |
e2530083 | 2396 | |
3b8d81e0 | 2397 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2398 | for (i = 0; i < local->hw.queues; i++) { |
2399 | /* | |
2400 | * If queue is stopped by something other than due to pending | |
2401 | * frames, or we have no pending frames, proceed to next queue. | |
2402 | */ | |
3b8d81e0 | 2403 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2404 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2405 | continue; |
e2530083 | 2406 | |
2a577d98 | 2407 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2408 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2409 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2410 | |
a7bc376c | 2411 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2412 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2413 | continue; |
2414 | } | |
2415 | ||
3b8d81e0 JB |
2416 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2417 | flags); | |
2418 | ||
2419 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2420 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2421 | flags); | |
2422 | if (!txok) | |
2a577d98 | 2423 | break; |
e2ebc74d | 2424 | } |
7236fe29 JB |
2425 | |
2426 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2427 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2428 | } |
3b8d81e0 | 2429 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2430 | |
f0e72851 | 2431 | rcu_read_unlock(); |
e2ebc74d JB |
2432 | } |
2433 | ||
2434 | /* functions for drivers to get certain frames */ | |
2435 | ||
eac70c13 | 2436 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2437 | struct ps_data *ps, struct sk_buff *skb, |
2438 | bool is_template) | |
e2ebc74d JB |
2439 | { |
2440 | u8 *pos, *tim; | |
2441 | int aid0 = 0; | |
2442 | int i, have_bits = 0, n1, n2; | |
2443 | ||
2444 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2445 | * mode. */ | |
d012a605 | 2446 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2447 | /* in the hope that this is faster than |
2448 | * checking byte-for-byte */ | |
f359d3fe | 2449 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 2450 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
2451 | if (!is_template) { |
2452 | if (ps->dtim_count == 0) | |
2453 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
2454 | else | |
2455 | ps->dtim_count--; | |
2456 | } | |
e2ebc74d JB |
2457 | |
2458 | tim = pos = (u8 *) skb_put(skb, 6); | |
2459 | *pos++ = WLAN_EID_TIM; | |
2460 | *pos++ = 4; | |
d012a605 | 2461 | *pos++ = ps->dtim_count; |
8860020e | 2462 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2463 | |
d012a605 | 2464 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2465 | aid0 = 1; |
2466 | ||
d012a605 | 2467 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2468 | |
e2ebc74d JB |
2469 | if (have_bits) { |
2470 | /* Find largest even number N1 so that bits numbered 1 through | |
2471 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2472 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2473 | n1 = 0; | |
2474 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2475 | if (ps->tim[i]) { |
e2ebc74d JB |
2476 | n1 = i & 0xfe; |
2477 | break; | |
2478 | } | |
2479 | } | |
2480 | n2 = n1; | |
2481 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2482 | if (ps->tim[i]) { |
e2ebc74d JB |
2483 | n2 = i; |
2484 | break; | |
2485 | } | |
2486 | } | |
2487 | ||
2488 | /* Bitmap control */ | |
2489 | *pos++ = n1 | aid0; | |
2490 | /* Part Virt Bitmap */ | |
5220da39 | 2491 | skb_put(skb, n2 - n1); |
d012a605 | 2492 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2493 | |
2494 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2495 | } else { |
2496 | *pos++ = aid0; /* Bitmap control */ | |
2497 | *pos++ = 0; /* Part Virt Bitmap */ | |
2498 | } | |
e2ebc74d JB |
2499 | } |
2500 | ||
eac70c13 | 2501 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2502 | struct ps_data *ps, struct sk_buff *skb, |
2503 | bool is_template) | |
eac70c13 MP |
2504 | { |
2505 | struct ieee80211_local *local = sdata->local; | |
2506 | ||
2507 | /* | |
2508 | * Not very nice, but we want to allow the driver to call | |
2509 | * ieee80211_beacon_get() as a response to the set_tim() | |
2510 | * callback. That, however, is already invoked under the | |
2511 | * sta_lock to guarantee consistent and race-free update | |
2512 | * of the tim bitmap in mac80211 and the driver. | |
2513 | */ | |
2514 | if (local->tim_in_locked_section) { | |
6ec8c332 | 2515 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 2516 | } else { |
1b91731d | 2517 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 2518 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 2519 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2520 | } |
2521 | ||
2522 | return 0; | |
2523 | } | |
2524 | ||
1af586c9 AO |
2525 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
2526 | struct beacon_data *beacon) | |
73da7d5b SW |
2527 | { |
2528 | struct probe_resp *resp; | |
cd7760e6 SW |
2529 | u8 *beacon_data; |
2530 | size_t beacon_data_len; | |
0d06d9ba | 2531 | int i; |
af296bdb | 2532 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
2533 | |
2534 | switch (sdata->vif.type) { | |
2535 | case NL80211_IFTYPE_AP: | |
2536 | beacon_data = beacon->tail; | |
2537 | beacon_data_len = beacon->tail_len; | |
2538 | break; | |
2539 | case NL80211_IFTYPE_ADHOC: | |
2540 | beacon_data = beacon->head; | |
2541 | beacon_data_len = beacon->head_len; | |
2542 | break; | |
b8456a14 CYY |
2543 | case NL80211_IFTYPE_MESH_POINT: |
2544 | beacon_data = beacon->head; | |
2545 | beacon_data_len = beacon->head_len; | |
2546 | break; | |
cd7760e6 SW |
2547 | default: |
2548 | return; | |
2549 | } | |
73da7d5b | 2550 | |
af296bdb | 2551 | rcu_read_lock(); |
0d06d9ba | 2552 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 2553 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 2554 | |
af296bdb MK |
2555 | if (beacon->csa_counter_offsets[i]) { |
2556 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
2557 | beacon_data_len)) { | |
0d06d9ba AO |
2558 | rcu_read_unlock(); |
2559 | return; | |
2560 | } | |
af296bdb MK |
2561 | |
2562 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 2563 | } |
af296bdb MK |
2564 | |
2565 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
2566 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 2567 | } |
af296bdb | 2568 | rcu_read_unlock(); |
1af586c9 AO |
2569 | } |
2570 | ||
2571 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) | |
2572 | { | |
2573 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
2574 | struct beacon_data *beacon = NULL; |
2575 | u8 count = 0; | |
0d06d9ba | 2576 | |
af296bdb MK |
2577 | rcu_read_lock(); |
2578 | ||
2579 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
2580 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
2581 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2582 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
2583 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
2584 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
2585 | ||
2586 | if (!beacon) | |
2587 | goto unlock; | |
2588 | ||
2589 | beacon->csa_current_counter--; | |
1af586c9 AO |
2590 | |
2591 | /* the counter should never reach 0 */ | |
af296bdb MK |
2592 | WARN_ON_ONCE(!beacon->csa_current_counter); |
2593 | count = beacon->csa_current_counter; | |
1af586c9 | 2594 | |
af296bdb MK |
2595 | unlock: |
2596 | rcu_read_unlock(); | |
2597 | return count; | |
73da7d5b | 2598 | } |
1af586c9 | 2599 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
2600 | |
2601 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
2602 | { | |
2603 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2604 | struct beacon_data *beacon = NULL; | |
2605 | u8 *beacon_data; | |
2606 | size_t beacon_data_len; | |
73da7d5b SW |
2607 | int ret = false; |
2608 | ||
2609 | if (!ieee80211_sdata_running(sdata)) | |
2610 | return false; | |
2611 | ||
2612 | rcu_read_lock(); | |
2613 | if (vif->type == NL80211_IFTYPE_AP) { | |
2614 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
2615 | ||
2616 | beacon = rcu_dereference(ap->beacon); | |
2617 | if (WARN_ON(!beacon || !beacon->tail)) | |
2618 | goto out; | |
2619 | beacon_data = beacon->tail; | |
2620 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
2621 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
2622 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
2623 | ||
2624 | beacon = rcu_dereference(ifibss->presp); | |
2625 | if (!beacon) | |
2626 | goto out; | |
2627 | ||
b8456a14 CYY |
2628 | beacon_data = beacon->head; |
2629 | beacon_data_len = beacon->head_len; | |
2630 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
2631 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
2632 | ||
2633 | beacon = rcu_dereference(ifmsh->beacon); | |
2634 | if (!beacon) | |
2635 | goto out; | |
2636 | ||
cd7760e6 SW |
2637 | beacon_data = beacon->head; |
2638 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
2639 | } else { |
2640 | WARN_ON(1); | |
2641 | goto out; | |
2642 | } | |
2643 | ||
10d78f27 MK |
2644 | if (!beacon->csa_counter_offsets[0]) |
2645 | goto out; | |
2646 | ||
af296bdb | 2647 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
2648 | goto out; |
2649 | ||
af296bdb | 2650 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
2651 | ret = true; |
2652 | out: | |
2653 | rcu_read_unlock(); | |
2654 | ||
2655 | return ret; | |
2656 | } | |
2657 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
2658 | ||
6ec8c332 AO |
2659 | static struct sk_buff * |
2660 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
2661 | struct ieee80211_vif *vif, | |
2662 | struct ieee80211_mutable_offsets *offs, | |
2663 | bool is_template) | |
e2ebc74d JB |
2664 | { |
2665 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 2666 | struct beacon_data *beacon = NULL; |
9d139c81 | 2667 | struct sk_buff *skb = NULL; |
e039fa4a | 2668 | struct ieee80211_tx_info *info; |
e2ebc74d | 2669 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2670 | enum ieee80211_band band; |
e00cfce0 | 2671 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2672 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 2673 | int csa_off_base = 0; |
8318d78a | 2674 | |
5dfdaf58 | 2675 | rcu_read_lock(); |
e2ebc74d | 2676 | |
32bfd35d | 2677 | sdata = vif_to_sdata(vif); |
55de908a | 2678 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2679 | |
55de908a | 2680 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2681 | goto out; |
2682 | ||
6ec8c332 AO |
2683 | if (offs) |
2684 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 2685 | |
05c914fe | 2686 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 2687 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 2688 | |
af296bdb | 2689 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 2690 | if (beacon) { |
10d78f27 | 2691 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2692 | if (!is_template) |
2693 | ieee80211_csa_update_counter(vif); | |
2694 | ||
2695 | ieee80211_set_csa(sdata, beacon); | |
2696 | } | |
73da7d5b | 2697 | |
902acc78 JB |
2698 | /* |
2699 | * headroom, head length, | |
2700 | * tail length and maximum TIM length | |
2701 | */ | |
2702 | skb = dev_alloc_skb(local->tx_headroom + | |
2703 | beacon->head_len + | |
70dabeb7 FF |
2704 | beacon->tail_len + 256 + |
2705 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
2706 | if (!skb) |
2707 | goto out; | |
33b64eb2 | 2708 | |
902acc78 JB |
2709 | skb_reserve(skb, local->tx_headroom); |
2710 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2711 | beacon->head_len); | |
33b64eb2 | 2712 | |
6ec8c332 AO |
2713 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
2714 | is_template); | |
33b64eb2 | 2715 | |
6ec8c332 AO |
2716 | if (offs) { |
2717 | offs->tim_offset = beacon->head_len; | |
2718 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
2719 | |
2720 | /* for AP the csa offsets are from tail */ | |
2721 | csa_off_base = skb->len; | |
6ec8c332 | 2722 | } |
eddcbb94 | 2723 | |
902acc78 JB |
2724 | if (beacon->tail) |
2725 | memcpy(skb_put(skb, beacon->tail_len), | |
2726 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2727 | } else |
2728 | goto out; | |
05c914fe | 2729 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2730 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2731 | struct ieee80211_hdr *hdr; |
33b64eb2 | 2732 | |
af296bdb MK |
2733 | beacon = rcu_dereference(ifibss->presp); |
2734 | if (!beacon) | |
9d139c81 JB |
2735 | goto out; |
2736 | ||
10d78f27 | 2737 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2738 | if (!is_template) |
2739 | ieee80211_csa_update_counter(vif); | |
cd7760e6 | 2740 | |
af296bdb | 2741 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2742 | } |
cd7760e6 | 2743 | |
af296bdb | 2744 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 2745 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
2746 | if (!skb) |
2747 | goto out; | |
c3ffeab4 | 2748 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2749 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2750 | beacon->head_len); | |
9d139c81 JB |
2751 | |
2752 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2753 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2754 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2755 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2756 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 2757 | |
af296bdb MK |
2758 | beacon = rcu_dereference(ifmsh->beacon); |
2759 | if (!beacon) | |
ac1bd846 | 2760 | goto out; |
ac1bd846 | 2761 | |
10d78f27 | 2762 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2763 | if (!is_template) |
2764 | /* TODO: For mesh csa_counter is in TU, so | |
2765 | * decrementing it by one isn't correct, but | |
2766 | * for now we leave it consistent with overall | |
2767 | * mac80211's behavior. | |
2768 | */ | |
2769 | ieee80211_csa_update_counter(vif); | |
2770 | ||
af296bdb | 2771 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2772 | } |
b8456a14 | 2773 | |
dbf498fb | 2774 | if (ifmsh->sync_ops) |
af296bdb | 2775 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
dbf498fb | 2776 | |
3b69a9c5 | 2777 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 2778 | beacon->head_len + |
3f52b7e3 | 2779 | 256 + /* TIM IE */ |
af296bdb | 2780 | beacon->tail_len + |
70dabeb7 | 2781 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
2782 | if (!skb) |
2783 | goto out; | |
2b5e1967 | 2784 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2785 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2786 | beacon->head_len); | |
6ec8c332 AO |
2787 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
2788 | ||
2789 | if (offs) { | |
af296bdb MK |
2790 | offs->tim_offset = beacon->head_len; |
2791 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
2792 | } |
2793 | ||
af296bdb MK |
2794 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
2795 | beacon->tail_len); | |
9d139c81 JB |
2796 | } else { |
2797 | WARN_ON(1); | |
5dfdaf58 | 2798 | goto out; |
e2ebc74d JB |
2799 | } |
2800 | ||
1af586c9 | 2801 | /* CSA offsets */ |
af296bdb | 2802 | if (offs && beacon) { |
1af586c9 AO |
2803 | int i; |
2804 | ||
2805 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 2806 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
2807 | |
2808 | if (!csa_off) | |
2809 | continue; | |
2810 | ||
2811 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
2812 | } | |
2813 | } | |
2814 | ||
4bf88530 | 2815 | band = chanctx_conf->def.chan->band; |
55de908a | 2816 | |
e039fa4a JB |
2817 | info = IEEE80211_SKB_CB(skb); |
2818 | ||
3b8d81e0 | 2819 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2820 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2821 | info->band = band; |
e00cfce0 JM |
2822 | |
2823 | memset(&txrc, 0, sizeof(txrc)); | |
2824 | txrc.hw = hw; | |
e31583cd | 2825 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2826 | txrc.bss_conf = &sdata->vif.bss_conf; |
2827 | txrc.skb = skb; | |
2828 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2829 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2830 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2831 | txrc.max_rate_idx = -1; |
2832 | else | |
2833 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2834 | txrc.bss = true; |
e00cfce0 | 2835 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2836 | |
2837 | info->control.vif = vif; | |
f591fa5d | 2838 | |
a472e71b JL |
2839 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2840 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2841 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2842 | out: |
5dfdaf58 | 2843 | rcu_read_unlock(); |
e2ebc74d | 2844 | return skb; |
6ec8c332 AO |
2845 | |
2846 | } | |
2847 | ||
2848 | struct sk_buff * | |
2849 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
2850 | struct ieee80211_vif *vif, | |
2851 | struct ieee80211_mutable_offsets *offs) | |
2852 | { | |
2853 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
2854 | } | |
2855 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
2856 | ||
2857 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
2858 | struct ieee80211_vif *vif, | |
2859 | u16 *tim_offset, u16 *tim_length) | |
2860 | { | |
2861 | struct ieee80211_mutable_offsets offs = {}; | |
2862 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
2863 | ||
2864 | if (tim_offset) | |
2865 | *tim_offset = offs.tim_offset; | |
2866 | ||
2867 | if (tim_length) | |
2868 | *tim_length = offs.tim_length; | |
2869 | ||
2870 | return bcn; | |
e2ebc74d | 2871 | } |
eddcbb94 | 2872 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2873 | |
02945821 AN |
2874 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2875 | struct ieee80211_vif *vif) | |
2876 | { | |
2877 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2878 | struct sk_buff *skb = NULL; |
2879 | struct probe_resp *presp = NULL; | |
02945821 AN |
2880 | struct ieee80211_hdr *hdr; |
2881 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2882 | ||
2883 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2884 | return NULL; | |
2885 | ||
2886 | rcu_read_lock(); | |
2887 | ||
2888 | ap = &sdata->u.ap; | |
2889 | presp = rcu_dereference(ap->probe_resp); | |
2890 | if (!presp) | |
2891 | goto out; | |
2892 | ||
aa7a0080 | 2893 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2894 | if (!skb) |
2895 | goto out; | |
2896 | ||
aa7a0080 ES |
2897 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2898 | ||
02945821 AN |
2899 | hdr = (struct ieee80211_hdr *) skb->data; |
2900 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2901 | ||
2902 | out: | |
2903 | rcu_read_unlock(); | |
2904 | return skb; | |
2905 | } | |
2906 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2907 | ||
7044cc56 KV |
2908 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2909 | struct ieee80211_vif *vif) | |
2910 | { | |
2911 | struct ieee80211_sub_if_data *sdata; | |
2912 | struct ieee80211_if_managed *ifmgd; | |
2913 | struct ieee80211_pspoll *pspoll; | |
2914 | struct ieee80211_local *local; | |
2915 | struct sk_buff *skb; | |
2916 | ||
2917 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2918 | return NULL; | |
2919 | ||
2920 | sdata = vif_to_sdata(vif); | |
2921 | ifmgd = &sdata->u.mgd; | |
2922 | local = sdata->local; | |
2923 | ||
2924 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2925 | if (!skb) |
7044cc56 | 2926 | return NULL; |
d15b8459 | 2927 | |
7044cc56 KV |
2928 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2929 | ||
2930 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2931 | memset(pspoll, 0, sizeof(*pspoll)); | |
2932 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2933 | IEEE80211_STYPE_PSPOLL); | |
2934 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2935 | ||
2936 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2937 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2938 | ||
2939 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2940 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2941 | ||
2942 | return skb; | |
2943 | } | |
2944 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2945 | ||
2946 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2947 | struct ieee80211_vif *vif) | |
2948 | { | |
2949 | struct ieee80211_hdr_3addr *nullfunc; | |
2950 | struct ieee80211_sub_if_data *sdata; | |
2951 | struct ieee80211_if_managed *ifmgd; | |
2952 | struct ieee80211_local *local; | |
2953 | struct sk_buff *skb; | |
2954 | ||
2955 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2956 | return NULL; | |
2957 | ||
2958 | sdata = vif_to_sdata(vif); | |
2959 | ifmgd = &sdata->u.mgd; | |
2960 | local = sdata->local; | |
2961 | ||
2962 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2963 | if (!skb) |
7044cc56 | 2964 | return NULL; |
d15b8459 | 2965 | |
7044cc56 KV |
2966 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2967 | ||
2968 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2969 | sizeof(*nullfunc)); | |
2970 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2971 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2972 | IEEE80211_STYPE_NULLFUNC | | |
2973 | IEEE80211_FCTL_TODS); | |
2974 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2975 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2976 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2977 | ||
2978 | return skb; | |
2979 | } | |
2980 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2981 | ||
05e54ea6 | 2982 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 2983 | const u8 *src_addr, |
05e54ea6 | 2984 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 2985 | size_t tailroom) |
05e54ea6 | 2986 | { |
a344d677 | 2987 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
2988 | struct ieee80211_hdr_3addr *hdr; |
2989 | struct sk_buff *skb; | |
2990 | size_t ie_ssid_len; | |
2991 | u8 *pos; | |
2992 | ||
05e54ea6 KV |
2993 | ie_ssid_len = 2 + ssid_len; |
2994 | ||
2995 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2996 | ie_ssid_len + tailroom); |
d15b8459 | 2997 | if (!skb) |
05e54ea6 | 2998 | return NULL; |
05e54ea6 KV |
2999 | |
3000 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3001 | ||
3002 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
3003 | memset(hdr, 0, sizeof(*hdr)); | |
3004 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
3005 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 3006 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 3007 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 3008 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
3009 | |
3010 | pos = skb_put(skb, ie_ssid_len); | |
3011 | *pos++ = WLAN_EID_SSID; | |
3012 | *pos++ = ssid_len; | |
88c868c4 | 3013 | if (ssid_len) |
05e54ea6 KV |
3014 | memcpy(pos, ssid, ssid_len); |
3015 | pos += ssid_len; | |
3016 | ||
05e54ea6 KV |
3017 | return skb; |
3018 | } | |
3019 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
3020 | ||
32bfd35d | 3021 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3022 | const void *frame, size_t frame_len, |
e039fa4a | 3023 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3024 | struct ieee80211_rts *rts) |
3025 | { | |
3026 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3027 | |
065e9605 HH |
3028 | rts->frame_control = |
3029 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
3030 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
3031 | frame_txctl); | |
e2ebc74d JB |
3032 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
3033 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
3034 | } | |
3035 | EXPORT_SYMBOL(ieee80211_rts_get); | |
3036 | ||
32bfd35d | 3037 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3038 | const void *frame, size_t frame_len, |
e039fa4a | 3039 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3040 | struct ieee80211_cts *cts) |
3041 | { | |
3042 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3043 | |
065e9605 HH |
3044 | cts->frame_control = |
3045 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
3046 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
3047 | frame_len, frame_txctl); | |
e2ebc74d JB |
3048 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
3049 | } | |
3050 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
3051 | ||
3052 | struct sk_buff * | |
32bfd35d | 3053 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 3054 | struct ieee80211_vif *vif) |
e2ebc74d JB |
3055 | { |
3056 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 3057 | struct sk_buff *skb = NULL; |
5cf121c3 | 3058 | struct ieee80211_tx_data tx; |
e2ebc74d | 3059 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 3060 | struct ps_data *ps; |
e039fa4a | 3061 | struct ieee80211_tx_info *info; |
55de908a | 3062 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 3063 | |
32bfd35d | 3064 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 3065 | |
5dfdaf58 | 3066 | rcu_read_lock(); |
55de908a | 3067 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 3068 | |
d012a605 MP |
3069 | if (!chanctx_conf) |
3070 | goto out; | |
3071 | ||
3072 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
3073 | struct beacon_data *beacon = | |
3074 | rcu_dereference(sdata->u.ap.beacon); | |
3075 | ||
3076 | if (!beacon || !beacon->head) | |
3077 | goto out; | |
3078 | ||
3079 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
3080 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
3081 | ps = &sdata->u.mesh.ps; | |
d012a605 | 3082 | } else { |
747cf5e9 | 3083 | goto out; |
d012a605 | 3084 | } |
5dfdaf58 | 3085 | |
d012a605 | 3086 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 3087 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 3088 | |
e2ebc74d | 3089 | while (1) { |
d012a605 | 3090 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 3091 | if (!skb) |
747cf5e9 | 3092 | goto out; |
e2ebc74d JB |
3093 | local->total_ps_buffered--; |
3094 | ||
d012a605 | 3095 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
3096 | struct ieee80211_hdr *hdr = |
3097 | (struct ieee80211_hdr *) skb->data; | |
3098 | /* more buffered multicast/broadcast frames ==> set | |
3099 | * MoreData flag in IEEE 802.11 header to inform PS | |
3100 | * STAs */ | |
3101 | hdr->frame_control |= | |
3102 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3103 | } | |
3104 | ||
112c44b2 | 3105 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 3106 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 3107 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d JB |
3108 | break; |
3109 | dev_kfree_skb_any(skb); | |
3110 | } | |
e039fa4a JB |
3111 | |
3112 | info = IEEE80211_SKB_CB(skb); | |
3113 | ||
5cf121c3 | 3114 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 3115 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 3116 | |
97b045d6 | 3117 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 3118 | skb = NULL; |
97b045d6 | 3119 | out: |
d0709a65 | 3120 | rcu_read_unlock(); |
e2ebc74d JB |
3121 | |
3122 | return skb; | |
3123 | } | |
3124 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 3125 | |
b6da911b LK |
3126 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
3127 | { | |
3128 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3129 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3130 | struct ieee80211_local *local = sdata->local; | |
3131 | int ret; | |
3132 | u32 queues; | |
3133 | ||
3134 | lockdep_assert_held(&local->sta_mtx); | |
3135 | ||
3136 | /* only some cases are supported right now */ | |
3137 | switch (sdata->vif.type) { | |
3138 | case NL80211_IFTYPE_STATION: | |
3139 | case NL80211_IFTYPE_AP: | |
3140 | case NL80211_IFTYPE_AP_VLAN: | |
3141 | break; | |
3142 | default: | |
3143 | WARN_ON(1); | |
3144 | return -EINVAL; | |
3145 | } | |
3146 | ||
3147 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
3148 | return -EINVAL; | |
3149 | ||
3150 | if (sta->reserved_tid == tid) { | |
3151 | ret = 0; | |
3152 | goto out; | |
3153 | } | |
3154 | ||
3155 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
3156 | sdata_err(sdata, "TID reservation already active\n"); | |
3157 | ret = -EALREADY; | |
3158 | goto out; | |
3159 | } | |
3160 | ||
3161 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
3162 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3163 | ||
3164 | synchronize_net(); | |
3165 | ||
3166 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
3167 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) { | |
3168 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3169 | __ieee80211_stop_tx_ba_session(sta, tid, | |
3170 | AGG_STOP_LOCAL_REQUEST); | |
3171 | } | |
3172 | ||
3173 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 3174 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
3175 | |
3176 | sta->reserved_tid = tid; | |
3177 | ||
3178 | ieee80211_wake_vif_queues(local, sdata, | |
3179 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3180 | ||
3181 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) | |
3182 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3183 | ||
3184 | ret = 0; | |
3185 | out: | |
3186 | return ret; | |
3187 | } | |
3188 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
3189 | ||
3190 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
3191 | { | |
3192 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3193 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3194 | ||
3195 | lockdep_assert_held(&sdata->local->sta_mtx); | |
3196 | ||
3197 | /* only some cases are supported right now */ | |
3198 | switch (sdata->vif.type) { | |
3199 | case NL80211_IFTYPE_STATION: | |
3200 | case NL80211_IFTYPE_AP: | |
3201 | case NL80211_IFTYPE_AP_VLAN: | |
3202 | break; | |
3203 | default: | |
3204 | WARN_ON(1); | |
3205 | return; | |
3206 | } | |
3207 | ||
3208 | if (tid != sta->reserved_tid) { | |
3209 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
3210 | return; | |
3211 | } | |
3212 | ||
3213 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
3214 | } | |
3215 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
3216 | ||
55de908a JB |
3217 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
3218 | struct sk_buff *skb, int tid, | |
3219 | enum ieee80211_band band) | |
3b8d81e0 | 3220 | { |
353d09c6 | 3221 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 3222 | |
3b8d81e0 JB |
3223 | skb_set_mac_header(skb, 0); |
3224 | skb_set_network_header(skb, 0); | |
3225 | skb_set_transport_header(skb, 0); | |
3226 | ||
3a25a8c8 | 3227 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 3228 | skb->priority = tid; |
cf0277e7 | 3229 | |
89afe614 JB |
3230 | skb->dev = sdata->dev; |
3231 | ||
3d34deb6 JB |
3232 | /* |
3233 | * The other path calling ieee80211_xmit is from the tasklet, | |
3234 | * and while we can handle concurrent transmissions locking | |
3235 | * requirements are that we do not come into tx with bhs on. | |
3236 | */ | |
3237 | local_bh_disable(); | |
73c4e195 | 3238 | IEEE80211_SKB_CB(skb)->band = band; |
7c10770f | 3239 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 3240 | local_bh_enable(); |
3b8d81e0 | 3241 | } |