Commit | Line | Data |
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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
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; | |
9c1c98a3 | 568 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
af61a165 | 569 | } |
a621fa4d JB |
570 | |
571 | return TX_CONTINUE; | |
572 | } | |
573 | ||
d9e8a70f | 574 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 575 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 576 | { |
46e6de15 | 577 | struct ieee80211_key *key; |
e039fa4a | 578 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 579 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 580 | |
3b8d81e0 | 581 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 582 | tx->key = NULL; |
2475b1cc MS |
583 | else if (tx->sta && |
584 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 585 | tx->key = key; |
3cfcf6ac | 586 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 587 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 588 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
589 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
590 | tx->key = key; | |
f7e0104c JB |
591 | else if (is_multicast_ether_addr(hdr->addr1) && |
592 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
593 | tx->key = key; | |
594 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
595 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 596 | tx->key = key; |
e8f4fb7c | 597 | else |
4922f71f | 598 | tx->key = NULL; |
e2ebc74d JB |
599 | |
600 | if (tx->key) { | |
813d7669 JB |
601 | bool skip_hw = false; |
602 | ||
e2ebc74d | 603 | tx->key->tx_rx_count++; |
011bfcc4 | 604 | /* TODO: add threshold stuff again */ |
176e4f84 | 605 | |
97359d12 JB |
606 | switch (tx->key->conf.cipher) { |
607 | case WLAN_CIPHER_SUITE_WEP40: | |
608 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 609 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 610 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
611 | tx->key = NULL; |
612 | break; | |
97359d12 | 613 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 614 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
615 | case WLAN_CIPHER_SUITE_GCMP: |
616 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
617 | if (!ieee80211_is_data_present(hdr->frame_control) && |
618 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
619 | tx->skb)) | |
620 | tx->key = NULL; | |
3b43a187 KV |
621 | else |
622 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 623 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 624 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 625 | break; |
97359d12 | 626 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 627 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
628 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
629 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
630 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
631 | tx->key = NULL; | |
632 | break; | |
176e4f84 | 633 | } |
813d7669 | 634 | |
e54faf29 JB |
635 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
636 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
637 | return TX_DROP; |
638 | ||
f12553eb | 639 | if (!skip_hw && tx->key && |
382b1655 | 640 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 641 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
642 | } |
643 | ||
9ae54c84 | 644 | return TX_CONTINUE; |
e2ebc74d JB |
645 | } |
646 | ||
d9e8a70f | 647 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 648 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 649 | { |
e039fa4a | 650 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
651 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
652 | struct ieee80211_supported_band *sband; | |
a2c40249 | 653 | u32 len; |
e6a9854b | 654 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 655 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 656 | bool assoc = false; |
8318d78a | 657 | |
e6a9854b | 658 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 659 | |
2d56577b | 660 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 661 | |
a2c40249 | 662 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 663 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
664 | |
665 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 666 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
667 | txrc.sband = sband; |
668 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
669 | txrc.skb = tx->skb; | |
670 | txrc.reported_rate.idx = -1; | |
2d56577b | 671 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
672 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
673 | txrc.max_rate_idx = -1; | |
674 | else | |
675 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
676 | |
677 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
678 | txrc.rate_idx_mcs_mask = | |
679 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
680 | ||
8f0729b1 | 681 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 682 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 683 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
684 | |
685 | /* set up RTS protection if desired */ | |
b9a5f8ca | 686 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 687 | txrc.rts = true; |
e2ebc74d | 688 | } |
e2ebc74d | 689 | |
0d528d85 | 690 | info->control.use_rts = txrc.rts; |
991fec09 FF |
691 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
692 | ||
e6a9854b JB |
693 | /* |
694 | * Use short preamble if the BSS can handle it, but not for | |
695 | * management frames unless we know the receiver can handle | |
696 | * that -- the management frame might be to a station that | |
697 | * just wants a probe response. | |
698 | */ | |
699 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
700 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 701 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
702 | txrc.short_preamble = true; |
703 | ||
704 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 705 | |
c2c98fde JB |
706 | if (tx->sta) |
707 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
708 | |
709 | /* | |
710 | * Lets not bother rate control if we're associated and cannot | |
711 | * talk to the sta. This should not happen. | |
712 | */ | |
c2c98fde | 713 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
714 | !rate_usable_index_exists(sband, &tx->sta->sta), |
715 | "%s: Dropped data frame as no usable bitrate found while " | |
716 | "scanning and associated. Target station: " | |
717 | "%pM on %d GHz band\n", | |
47846c9b | 718 | tx->sdata->name, hdr->addr1, |
2d56577b | 719 | info->band ? 5 : 2)) |
b770b43e | 720 | return TX_DROP; |
2e92e6f2 | 721 | |
b770b43e LR |
722 | /* |
723 | * If we're associated with the sta at this point we know we can at | |
724 | * least send the frame at the lowest bit rate. | |
725 | */ | |
e6a9854b JB |
726 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
727 | ||
0d528d85 FF |
728 | if (tx->sta && !info->control.skip_table) |
729 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
730 | ||
731 | if (unlikely(info->control.rates[0].idx < 0)) { | |
732 | if (ratetbl) { | |
733 | struct ieee80211_tx_rate rate = { | |
734 | .idx = ratetbl->rate[0].idx, | |
735 | .flags = ratetbl->rate[0].flags, | |
736 | .count = ratetbl->rate[0].count | |
737 | }; | |
738 | ||
739 | if (ratetbl->rate[0].idx < 0) | |
740 | return TX_DROP; | |
741 | ||
742 | tx->rate = rate; | |
743 | } else { | |
744 | return TX_DROP; | |
745 | } | |
746 | } else { | |
747 | tx->rate = info->control.rates[0]; | |
748 | } | |
e6a9854b | 749 | |
c1ce5a74 | 750 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 751 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
752 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
753 | tx->sta->last_tx_rate = txrc.reported_rate; | |
754 | } else if (tx->sta) | |
e6a9854b | 755 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 756 | |
0d528d85 FF |
757 | if (ratetbl) |
758 | return TX_CONTINUE; | |
759 | ||
e6a9854b JB |
760 | if (unlikely(!info->control.rates[0].count)) |
761 | info->control.rates[0].count = 1; | |
e2ebc74d | 762 | |
9955151d GS |
763 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
764 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
765 | info->control.rates[0].count = 1; | |
766 | ||
e6a9854b JB |
767 | return TX_CONTINUE; |
768 | } | |
769 | ||
f591fa5d JB |
770 | static ieee80211_tx_result debug_noinline |
771 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
772 | { | |
773 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
774 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
775 | u16 *seq; | |
776 | u8 *qc; | |
777 | int tid; | |
778 | ||
25d834e1 JB |
779 | /* |
780 | * Packet injection may want to control the sequence | |
781 | * number, if we have no matching interface then we | |
782 | * neither assign one ourselves nor ask the driver to. | |
783 | */ | |
5061b0c2 | 784 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
785 | return TX_CONTINUE; |
786 | ||
f591fa5d JB |
787 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
788 | return TX_CONTINUE; | |
789 | ||
790 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
791 | return TX_CONTINUE; | |
792 | ||
49a59543 JB |
793 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
794 | return TX_CONTINUE; | |
795 | ||
94778280 JB |
796 | /* |
797 | * Anything but QoS data that has a sequence number field | |
798 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
799 | * counter. QoS data frames with a multicast destination |
800 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 801 | */ |
c4c205f3 BC |
802 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
803 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 804 | /* driver should assign sequence number */ |
f591fa5d | 805 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
806 | /* for pure STA mode without beacons, we can do it */ |
807 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
808 | tx->sdata->sequence_number += 0x10; | |
79c892b8 JB |
809 | if (tx->sta) |
810 | tx->sta->tx_msdu[IEEE80211_NUM_TIDS]++; | |
f591fa5d JB |
811 | return TX_CONTINUE; |
812 | } | |
813 | ||
814 | /* | |
815 | * This should be true for injected/management frames only, for | |
816 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
817 | * above since they are not QoS-data frames. | |
818 | */ | |
819 | if (!tx->sta) | |
820 | return TX_CONTINUE; | |
821 | ||
822 | /* include per-STA, per-TID sequence counter */ | |
823 | ||
824 | qc = ieee80211_get_qos_ctl(hdr); | |
825 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
826 | seq = &tx->sta->tid_seq[tid]; | |
79c892b8 | 827 | tx->sta->tx_msdu[tid]++; |
f591fa5d JB |
828 | |
829 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
830 | ||
831 | /* Increase the sequence number. */ | |
832 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
833 | ||
834 | return TX_CONTINUE; | |
835 | } | |
836 | ||
252b86c4 | 837 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
838 | struct sk_buff *skb, int hdrlen, |
839 | int frag_threshold) | |
840 | { | |
252b86c4 | 841 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 842 | struct ieee80211_tx_info *info; |
252b86c4 | 843 | struct sk_buff *tmp; |
2de8e0d9 JB |
844 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
845 | int pos = hdrlen + per_fragm; | |
846 | int rem = skb->len - hdrlen - per_fragm; | |
847 | ||
848 | if (WARN_ON(rem < 0)) | |
849 | return -EINVAL; | |
850 | ||
252b86c4 JB |
851 | /* first fragment was already added to queue by caller */ |
852 | ||
2de8e0d9 JB |
853 | while (rem) { |
854 | int fraglen = per_fragm; | |
855 | ||
856 | if (fraglen > rem) | |
857 | fraglen = rem; | |
858 | rem -= fraglen; | |
859 | tmp = dev_alloc_skb(local->tx_headroom + | |
860 | frag_threshold + | |
2475b1cc | 861 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
862 | IEEE80211_ENCRYPT_TAILROOM); |
863 | if (!tmp) | |
864 | return -ENOMEM; | |
252b86c4 JB |
865 | |
866 | __skb_queue_tail(&tx->skbs, tmp); | |
867 | ||
2475b1cc MS |
868 | skb_reserve(tmp, |
869 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
870 | ||
2de8e0d9 JB |
871 | /* copy control information */ |
872 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
873 | |
874 | info = IEEE80211_SKB_CB(tmp); | |
875 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
876 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
877 | ||
878 | if (rem) | |
879 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
880 | ||
2de8e0d9 JB |
881 | skb_copy_queue_mapping(tmp, skb); |
882 | tmp->priority = skb->priority; | |
2de8e0d9 | 883 | tmp->dev = skb->dev; |
2de8e0d9 JB |
884 | |
885 | /* copy header and data */ | |
886 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
887 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
888 | ||
889 | pos += fraglen; | |
890 | } | |
891 | ||
252b86c4 | 892 | /* adjust first fragment's length */ |
338f977f | 893 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
894 | return 0; |
895 | } | |
896 | ||
d9e8a70f | 897 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
898 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
899 | { | |
2de8e0d9 JB |
900 | struct sk_buff *skb = tx->skb; |
901 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
902 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 903 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
904 | int hdrlen; |
905 | int fragnum; | |
e2454948 | 906 | |
252b86c4 JB |
907 | /* no matter what happens, tx->skb moves to tx->skbs */ |
908 | __skb_queue_tail(&tx->skbs, skb); | |
909 | tx->skb = NULL; | |
910 | ||
a26eb27a JB |
911 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
912 | return TX_CONTINUE; | |
913 | ||
914 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
915 | return TX_CONTINUE; |
916 | ||
eefce91a JB |
917 | /* |
918 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 919 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 920 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 921 | */ |
8b30b1fe | 922 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
923 | return TX_DROP; |
924 | ||
065e9605 | 925 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 926 | |
a26eb27a | 927 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 928 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 929 | return TX_DROP; |
e6a9854b | 930 | |
2de8e0d9 JB |
931 | /* |
932 | * Now fragment the frame. This will allocate all the fragments and | |
933 | * chain them (using skb as the first fragment) to skb->next. | |
934 | * During transmission, we will remove the successfully transmitted | |
935 | * fragments from this list. When the low-level driver rejects one | |
936 | * of the fragments then we will simply pretend to accept the skb | |
937 | * but store it away as pending. | |
938 | */ | |
252b86c4 | 939 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 940 | return TX_DROP; |
e6a9854b | 941 | |
2de8e0d9 JB |
942 | /* update duration/seq/flags of fragments */ |
943 | fragnum = 0; | |
252b86c4 JB |
944 | |
945 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 946 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 947 | |
2de8e0d9 JB |
948 | hdr = (void *)skb->data; |
949 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 950 | |
252b86c4 | 951 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 952 | hdr->frame_control |= morefrags; |
e6a9854b JB |
953 | /* |
954 | * No multi-rate retries for fragmented frames, that | |
955 | * would completely throw off the NAV at other STAs. | |
956 | */ | |
957 | info->control.rates[1].idx = -1; | |
958 | info->control.rates[2].idx = -1; | |
959 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 960 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 961 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
962 | } else { |
963 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 964 | } |
2de8e0d9 JB |
965 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
966 | fragnum++; | |
252b86c4 | 967 | } |
e2ebc74d | 968 | |
9ae54c84 | 969 | return TX_CONTINUE; |
e2ebc74d JB |
970 | } |
971 | ||
feff1f2f JB |
972 | static ieee80211_tx_result debug_noinline |
973 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
974 | { | |
252b86c4 | 975 | struct sk_buff *skb; |
560d2682 | 976 | int ac = -1; |
feff1f2f JB |
977 | |
978 | if (!tx->sta) | |
979 | return TX_CONTINUE; | |
980 | ||
252b86c4 | 981 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 982 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 983 | tx->sta->tx_fragments++; |
560d2682 | 984 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 985 | } |
560d2682 JB |
986 | if (ac >= 0) |
987 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
988 | |
989 | return TX_CONTINUE; | |
990 | } | |
991 | ||
d9e8a70f | 992 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
993 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
994 | { | |
995 | if (!tx->key) | |
996 | return TX_CONTINUE; | |
997 | ||
97359d12 JB |
998 | switch (tx->key->conf.cipher) { |
999 | case WLAN_CIPHER_SUITE_WEP40: | |
1000 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1001 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1002 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1003 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1004 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1005 | return ieee80211_crypto_ccmp_encrypt( |
1006 | tx, IEEE80211_CCMP_MIC_LEN); | |
1007 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1008 | return ieee80211_crypto_ccmp_encrypt( | |
1009 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1010 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1011 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1012 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1013 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1014 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1015 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1016 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1017 | case WLAN_CIPHER_SUITE_GCMP: |
1018 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1019 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1020 | default: |
d32a1028 | 1021 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1022 | } |
1023 | ||
e2454948 JB |
1024 | return TX_DROP; |
1025 | } | |
1026 | ||
d9e8a70f | 1027 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1028 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1029 | { | |
252b86c4 | 1030 | struct sk_buff *skb; |
2de8e0d9 JB |
1031 | struct ieee80211_hdr *hdr; |
1032 | int next_len; | |
1033 | bool group_addr; | |
03f93c3d | 1034 | |
252b86c4 | 1035 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1036 | hdr = (void *) skb->data; |
7e0aae47 JM |
1037 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1038 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1039 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1040 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1041 | next_len = next->len; | |
1042 | } else | |
1043 | next_len = 0; | |
2de8e0d9 | 1044 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1045 | |
2de8e0d9 | 1046 | hdr->duration_id = |
252b86c4 JB |
1047 | ieee80211_duration(tx, skb, group_addr, next_len); |
1048 | } | |
03f93c3d JB |
1049 | |
1050 | return TX_CONTINUE; | |
1051 | } | |
1052 | ||
e2ebc74d JB |
1053 | /* actual transmit path */ |
1054 | ||
a622ab72 JB |
1055 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1056 | struct sk_buff *skb, | |
1057 | struct ieee80211_tx_info *info, | |
1058 | struct tid_ampdu_tx *tid_tx, | |
1059 | int tid) | |
1060 | { | |
1061 | bool queued = false; | |
285fa695 | 1062 | bool reset_agg_timer = false; |
aa454580 | 1063 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1064 | |
1065 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1066 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1067 | reset_agg_timer = true; |
0ab33703 JB |
1068 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1069 | /* | |
1070 | * nothing -- this aggregation session is being started | |
1071 | * but that might still fail with the driver | |
1072 | */ | |
a622ab72 JB |
1073 | } else { |
1074 | spin_lock(&tx->sta->lock); | |
1075 | /* | |
1076 | * Need to re-check now, because we may get here | |
1077 | * | |
1078 | * 1) in the window during which the setup is actually | |
1079 | * already done, but not marked yet because not all | |
1080 | * packets are spliced over to the driver pending | |
1081 | * queue yet -- if this happened we acquire the lock | |
1082 | * either before or after the splice happens, but | |
1083 | * need to recheck which of these cases happened. | |
1084 | * | |
1085 | * 2) during session teardown, if the OPERATIONAL bit | |
1086 | * was cleared due to the teardown but the pointer | |
1087 | * hasn't been assigned NULL yet (or we loaded it | |
1088 | * before it was assigned) -- in this case it may | |
1089 | * now be NULL which means we should just let the | |
1090 | * packet pass through because splicing the frames | |
1091 | * back is already done. | |
1092 | */ | |
40b275b6 | 1093 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1094 | |
1095 | if (!tid_tx) { | |
1096 | /* do nothing, let packet pass through */ | |
1097 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1098 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1099 | reset_agg_timer = true; |
a622ab72 JB |
1100 | } else { |
1101 | queued = true; | |
1102 | info->control.vif = &tx->sdata->vif; | |
1103 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
03c8c06f | 1104 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1105 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1106 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1107 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1108 | } |
1109 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1110 | |
1111 | if (purge_skb) | |
c3e7724b | 1112 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1113 | } |
1114 | ||
285fa695 NM |
1115 | /* reset session timer */ |
1116 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1117 | tid_tx->last_tx = jiffies; |
285fa695 | 1118 | |
a622ab72 JB |
1119 | return queued; |
1120 | } | |
1121 | ||
58d4185e JB |
1122 | /* |
1123 | * initialises @tx | |
7c10770f JB |
1124 | * pass %NULL for the station if unknown, a valid pointer if known |
1125 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1126 | */ |
9ae54c84 | 1127 | static ieee80211_tx_result |
3b8d81e0 JB |
1128 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1129 | struct ieee80211_tx_data *tx, | |
7c10770f | 1130 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1131 | { |
3b8d81e0 | 1132 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1133 | struct ieee80211_hdr *hdr; |
e039fa4a | 1134 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1135 | int tid; |
a622ab72 | 1136 | u8 *qc; |
e2ebc74d JB |
1137 | |
1138 | memset(tx, 0, sizeof(*tx)); | |
1139 | tx->skb = skb; | |
e2ebc74d | 1140 | tx->local = local; |
3b8d81e0 | 1141 | tx->sdata = sdata; |
252b86c4 | 1142 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1143 | |
cd8ffc80 JB |
1144 | /* |
1145 | * If this flag is set to true anywhere, and we get here, | |
1146 | * we are doing the needed processing, so remove the flag | |
1147 | * now. | |
1148 | */ | |
1149 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1150 | ||
58d4185e JB |
1151 | hdr = (struct ieee80211_hdr *) skb->data; |
1152 | ||
7c10770f JB |
1153 | if (likely(sta)) { |
1154 | if (!IS_ERR(sta)) | |
1155 | tx->sta = sta; | |
1156 | } else { | |
1157 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1158 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1159 | if (!tx->sta && sdata->wdev.use_4addr) | |
1160 | return TX_DROP; | |
1161 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1162 | IEEE80211_TX_CTL_INJECTED) || | |
1163 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1164 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1165 | } | |
1166 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1167 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1168 | } |
58d4185e | 1169 | |
cd8ffc80 | 1170 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1171 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1172 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1173 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1174 | struct tid_ampdu_tx *tid_tx; |
1175 | ||
8b30b1fe S |
1176 | qc = ieee80211_get_qos_ctl(hdr); |
1177 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1178 | ||
a622ab72 JB |
1179 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1180 | if (tid_tx) { | |
1181 | bool queued; | |
cd8ffc80 | 1182 | |
a622ab72 JB |
1183 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1184 | tid_tx, tid); | |
1185 | ||
1186 | if (unlikely(queued)) | |
1187 | return TX_QUEUED; | |
1188 | } | |
8b30b1fe S |
1189 | } |
1190 | ||
badffb72 | 1191 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1192 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1193 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1194 | } else |
5cf121c3 | 1195 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1196 | |
a26eb27a JB |
1197 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1198 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1199 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1200 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1201 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1202 | } |
1203 | ||
e2ebc74d | 1204 | if (!tx->sta) |
e039fa4a | 1205 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1206 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1207 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1208 | |
e039fa4a | 1209 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1210 | |
9ae54c84 | 1211 | return TX_CONTINUE; |
e2ebc74d JB |
1212 | } |
1213 | ||
11127e91 JB |
1214 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1215 | struct ieee80211_vif *vif, | |
1216 | struct ieee80211_sta *sta, | |
1217 | struct sk_buff_head *skbs, | |
1218 | bool txpending) | |
e2ebc74d | 1219 | { |
36323f81 | 1220 | struct ieee80211_tx_control control; |
252b86c4 | 1221 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1222 | unsigned long flags; |
e2ebc74d | 1223 | |
252b86c4 | 1224 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1225 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1226 | int q = info->hw_queue; | |
1227 | ||
1228 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1229 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1230 | __skb_unlink(skb, skbs); | |
c3e7724b | 1231 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1232 | continue; |
1233 | } | |
1234 | #endif | |
3b8d81e0 JB |
1235 | |
1236 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1237 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1238 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1239 | if (unlikely(info->flags & |
a7679ed5 SF |
1240 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1241 | if (local->queue_stop_reasons[q] & | |
1242 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1243 | /* | |
1244 | * Drop off-channel frames if queues | |
1245 | * are stopped for any reason other | |
1246 | * than off-channel operation. Never | |
1247 | * queue them. | |
1248 | */ | |
1249 | spin_unlock_irqrestore( | |
1250 | &local->queue_stop_reason_lock, | |
1251 | flags); | |
1252 | ieee80211_purge_tx_queue(&local->hw, | |
1253 | skbs); | |
1254 | return true; | |
1255 | } | |
1256 | } else { | |
1257 | ||
6c17b77b | 1258 | /* |
a7679ed5 SF |
1259 | * Since queue is stopped, queue up frames for |
1260 | * later transmission from the tx-pending | |
1261 | * tasklet when the queue is woken again. | |
6c17b77b | 1262 | */ |
a7679ed5 SF |
1263 | if (txpending) |
1264 | skb_queue_splice_init(skbs, | |
1265 | &local->pending[q]); | |
1266 | else | |
1267 | skb_queue_splice_tail_init(skbs, | |
1268 | &local->pending[q]); | |
1269 | ||
1270 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1271 | flags); | |
1272 | return false; | |
6c17b77b | 1273 | } |
7bb45683 | 1274 | } |
3b8d81e0 | 1275 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1276 | |
11127e91 | 1277 | info->control.vif = vif; |
36323f81 | 1278 | control.sta = sta; |
f0e72851 | 1279 | |
11127e91 | 1280 | __skb_unlink(skb, skbs); |
36323f81 | 1281 | drv_tx(local, &control, skb); |
11127e91 | 1282 | } |
5061b0c2 | 1283 | |
11127e91 JB |
1284 | return true; |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1289 | */ | |
1290 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1291 | struct sk_buff_head *skbs, int led_len, | |
1292 | struct sta_info *sta, bool txpending) | |
1293 | { | |
1294 | struct ieee80211_tx_info *info; | |
1295 | struct ieee80211_sub_if_data *sdata; | |
1296 | struct ieee80211_vif *vif; | |
1297 | struct ieee80211_sta *pubsta; | |
1298 | struct sk_buff *skb; | |
1299 | bool result = true; | |
1300 | __le16 fc; | |
5061b0c2 | 1301 | |
11127e91 JB |
1302 | if (WARN_ON(skb_queue_empty(skbs))) |
1303 | return true; | |
ec25acc4 | 1304 | |
11127e91 JB |
1305 | skb = skb_peek(skbs); |
1306 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1307 | info = IEEE80211_SKB_CB(skb); | |
1308 | sdata = vif_to_sdata(info->control.vif); | |
1309 | if (sta && !sta->uploaded) | |
1310 | sta = NULL; | |
1311 | ||
1312 | if (sta) | |
1313 | pubsta = &sta->sta; | |
1314 | else | |
1315 | pubsta = NULL; | |
1316 | ||
1317 | switch (sdata->vif.type) { | |
1318 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1319 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1320 | vif = &sdata->vif; | |
1321 | break; | |
1322 | } | |
4b6f1dd6 | 1323 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1324 | if (sdata) { |
4b6f1dd6 | 1325 | vif = &sdata->vif; |
3a25a8c8 JB |
1326 | info->hw_queue = |
1327 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1328 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1329 | dev_kfree_skb(skb); | |
1330 | return true; | |
1331 | } else | |
4b6f1dd6 | 1332 | vif = NULL; |
11127e91 JB |
1333 | break; |
1334 | case NL80211_IFTYPE_AP_VLAN: | |
1335 | sdata = container_of(sdata->bss, | |
1336 | struct ieee80211_sub_if_data, u.ap); | |
1337 | /* fall through */ | |
1338 | default: | |
1339 | vif = &sdata->vif; | |
1340 | break; | |
e2ebc74d | 1341 | } |
2de8e0d9 | 1342 | |
cb831b53 JB |
1343 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1344 | txpending); | |
11127e91 | 1345 | |
74e4dbfd | 1346 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1347 | |
4db4e0a1 | 1348 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1349 | |
11127e91 | 1350 | return result; |
e2ebc74d JB |
1351 | } |
1352 | ||
97b045d6 JB |
1353 | /* |
1354 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1355 | * frame was dropped or queued. | |
1356 | */ | |
1357 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1358 | { | |
252b86c4 | 1359 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1360 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1361 | |
9aa4aee3 JB |
1362 | #define CALL_TXH(txh) \ |
1363 | do { \ | |
1364 | res = txh(tx); \ | |
1365 | if (res != TX_CONTINUE) \ | |
1366 | goto txh_done; \ | |
1367 | } while (0) | |
1368 | ||
5c1b98a5 | 1369 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1370 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1371 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1372 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1373 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1374 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1375 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1376 | |
aa5b5492 JB |
1377 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1378 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1379 | tx->skb = NULL; | |
c6fcf6bc | 1380 | goto txh_done; |
aa5b5492 | 1381 | } |
c6fcf6bc JB |
1382 | |
1383 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1384 | CALL_TXH(ieee80211_tx_h_sequence); |
1385 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1386 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1387 | CALL_TXH(ieee80211_tx_h_stats); |
1388 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1389 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1390 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1391 | #undef CALL_TXH |
97b045d6 | 1392 | |
d9e8a70f | 1393 | txh_done: |
97b045d6 | 1394 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1395 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1396 | if (tx->skb) |
c3e7724b | 1397 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1398 | else |
1f98ab7f | 1399 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1400 | return -1; |
1401 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1402 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1403 | return -1; |
1404 | } | |
1405 | ||
1406 | return 0; | |
1407 | } | |
1408 | ||
06be6b14 FF |
1409 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1410 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1411 | int band, struct ieee80211_sta **sta) | |
1412 | { | |
1413 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1414 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1415 | struct ieee80211_tx_data tx; | |
88724a81 | 1416 | struct sk_buff *skb2; |
06be6b14 | 1417 | |
7c10770f | 1418 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1419 | return false; |
1420 | ||
1421 | info->band = band; | |
1422 | info->control.vif = vif; | |
1423 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1424 | ||
1425 | if (invoke_tx_handlers(&tx)) | |
1426 | return false; | |
1427 | ||
1428 | if (sta) { | |
1429 | if (tx.sta) | |
1430 | *sta = &tx.sta->sta; | |
1431 | else | |
1432 | *sta = NULL; | |
1433 | } | |
1434 | ||
88724a81 JB |
1435 | /* this function isn't suitable for fragmented data frames */ |
1436 | skb2 = __skb_dequeue(&tx.skbs); | |
1437 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1438 | ieee80211_free_txskb(hw, skb2); | |
1439 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1440 | return false; | |
1441 | } | |
1442 | ||
06be6b14 FF |
1443 | return true; |
1444 | } | |
1445 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1446 | ||
7bb45683 JB |
1447 | /* |
1448 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1449 | */ | |
1450 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f JB |
1451 | struct sta_info *sta, struct sk_buff *skb, |
1452 | bool txpending) | |
e2ebc74d | 1453 | { |
3b8d81e0 | 1454 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1455 | struct ieee80211_tx_data tx; |
97b045d6 | 1456 | ieee80211_tx_result res_prepare; |
e039fa4a | 1457 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1458 | bool result = true; |
74e4dbfd | 1459 | int led_len; |
e2ebc74d | 1460 | |
e2ebc74d JB |
1461 | if (unlikely(skb->len < 10)) { |
1462 | dev_kfree_skb(skb); | |
7bb45683 | 1463 | return true; |
e2ebc74d JB |
1464 | } |
1465 | ||
58d4185e | 1466 | /* initialises tx */ |
74e4dbfd | 1467 | led_len = skb->len; |
7c10770f | 1468 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1469 | |
cd8ffc80 | 1470 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1471 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1472 | return true; |
cd8ffc80 | 1473 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1474 | return true; |
e2ebc74d JB |
1475 | } |
1476 | ||
3a25a8c8 JB |
1477 | /* set up hw_queue value early */ |
1478 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1479 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1480 | info->hw_queue = | |
1481 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1482 | ||
7bb45683 | 1483 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1484 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1485 | tx.sta, txpending); | |
55de908a | 1486 | |
7bb45683 | 1487 | return result; |
e2ebc74d JB |
1488 | } |
1489 | ||
1490 | /* device xmit handlers */ | |
1491 | ||
3bff1865 | 1492 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1493 | struct sk_buff *skb, |
1494 | int head_need, bool may_encrypt) | |
1495 | { | |
3bff1865 | 1496 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1497 | int tail_need = 0; |
1498 | ||
3bff1865 | 1499 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1500 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1501 | tail_need -= skb_tailroom(skb); | |
1502 | tail_need = max_t(int, tail_need, 0); | |
1503 | } | |
1504 | ||
c70f59a2 IY |
1505 | if (skb_cloned(skb) && |
1506 | (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CLONED_SKBS) || | |
1507 | !skb_clone_writable(skb, ETH_HLEN) || | |
1508 | sdata->crypto_tx_tailroom_needed_cnt)) | |
23c0752a | 1509 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1510 | else if (head_need || tail_need) |
23c0752a | 1511 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1512 | else |
1513 | return 0; | |
23c0752a JB |
1514 | |
1515 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1516 | wiphy_debug(local->hw.wiphy, |
1517 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1518 | return -ENOMEM; |
1519 | } | |
1520 | ||
23c0752a JB |
1521 | return 0; |
1522 | } | |
1523 | ||
7c10770f JB |
1524 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1525 | struct sta_info *sta, struct sk_buff *skb) | |
e2ebc74d | 1526 | { |
3b8d81e0 | 1527 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1528 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1529 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1530 | int headroom; |
23c0752a | 1531 | bool may_encrypt; |
e2ebc74d | 1532 | |
3b8d81e0 | 1533 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1534 | |
3b8d81e0 | 1535 | headroom = local->tx_headroom; |
23c0752a | 1536 | if (may_encrypt) |
2475b1cc | 1537 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1538 | headroom -= skb_headroom(skb); |
1539 | headroom = max_t(int, 0, headroom); | |
1540 | ||
3bff1865 | 1541 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1542 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1543 | return; |
e2ebc74d JB |
1544 | } |
1545 | ||
740c1aa3 | 1546 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1547 | info->control.vif = &sdata->vif; |
e2ebc74d | 1548 | |
3f52b7e3 MP |
1549 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1550 | if (ieee80211_is_data(hdr->frame_control) && | |
1551 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1552 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1553 | return; /* skb queued: don't free */ |
1554 | } else { | |
1555 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1556 | } | |
98aed9fd | 1557 | } |
cca89496 | 1558 | |
2154c81c | 1559 | ieee80211_set_qos_hdr(sdata, skb); |
7c10770f | 1560 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
1561 | } |
1562 | ||
73b9f03a JB |
1563 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1564 | { | |
1565 | struct ieee80211_radiotap_iterator iterator; | |
1566 | struct ieee80211_radiotap_header *rthdr = | |
1567 | (struct ieee80211_radiotap_header *) skb->data; | |
1568 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1569 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1570 | NULL); | |
1571 | u16 txflags; | |
1572 | ||
1573 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1574 | IEEE80211_TX_CTL_DONTFRAG; | |
1575 | ||
1576 | /* | |
1577 | * for every radiotap entry that is present | |
1578 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1579 | * entries present, or -EINVAL on error) | |
1580 | */ | |
1581 | ||
1582 | while (!ret) { | |
1583 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1584 | ||
1585 | if (ret) | |
1586 | continue; | |
1587 | ||
1588 | /* see if this argument is something we can use */ | |
1589 | switch (iterator.this_arg_index) { | |
1590 | /* | |
1591 | * You must take care when dereferencing iterator.this_arg | |
1592 | * for multibyte types... the pointer is not aligned. Use | |
1593 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1594 | * iterator.this_arg for type "type" safely on all arches. | |
1595 | */ | |
1596 | case IEEE80211_RADIOTAP_FLAGS: | |
1597 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1598 | /* | |
1599 | * this indicates that the skb we have been | |
1600 | * handed has the 32-bit FCS CRC at the end... | |
1601 | * we should react to that by snipping it off | |
1602 | * because it will be recomputed and added | |
1603 | * on transmission | |
1604 | */ | |
1605 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1606 | return false; | |
1607 | ||
1608 | skb_trim(skb, skb->len - FCS_LEN); | |
1609 | } | |
1610 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1611 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1612 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1613 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1614 | break; | |
1615 | ||
1616 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1617 | txflags = get_unaligned_le16(iterator.this_arg); | |
1618 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1619 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1620 | break; | |
1621 | ||
1622 | /* | |
1623 | * Please update the file | |
1624 | * Documentation/networking/mac80211-injection.txt | |
1625 | * when parsing new fields here. | |
1626 | */ | |
1627 | ||
1628 | default: | |
1629 | break; | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1634 | return false; | |
1635 | ||
1636 | /* | |
1637 | * remove the radiotap header | |
1638 | * iterator->_max_length was sanity-checked against | |
1639 | * skb->len by iterator init | |
1640 | */ | |
1641 | skb_pull(skb, iterator._max_length); | |
1642 | ||
1643 | return true; | |
1644 | } | |
1645 | ||
d0cf9c0d SH |
1646 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1647 | struct net_device *dev) | |
e2ebc74d JB |
1648 | { |
1649 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 1650 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
1651 | struct ieee80211_radiotap_header *prthdr = |
1652 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1653 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1654 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1655 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 1656 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 1657 | u16 len_rthdr; |
5d9cf4a5 | 1658 | int hdrlen; |
e2ebc74d | 1659 | |
9b8a74e3 AG |
1660 | /* check for not even having the fixed radiotap header part */ |
1661 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1662 | goto fail; /* too short to be possibly valid */ | |
1663 | ||
1664 | /* is it a header version we can trust to find length from? */ | |
1665 | if (unlikely(prthdr->it_version)) | |
1666 | goto fail; /* only version 0 is supported */ | |
1667 | ||
1668 | /* then there must be a radiotap header with a length we can use */ | |
1669 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1670 | ||
1671 | /* does the skb contain enough to deliver on the alleged length? */ | |
1672 | if (unlikely(skb->len < len_rthdr)) | |
1673 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1674 | |
e2ebc74d JB |
1675 | /* |
1676 | * fix up the pointers accounting for the radiotap | |
1677 | * header still being in there. We are being given | |
1678 | * a precooked IEEE80211 header so no need for | |
1679 | * normal processing | |
1680 | */ | |
9b8a74e3 | 1681 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1682 | /* |
9b8a74e3 AG |
1683 | * these are just fixed to the end of the rt area since we |
1684 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1685 | */ |
9b8a74e3 AG |
1686 | skb_set_network_header(skb, len_rthdr); |
1687 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1688 | |
5d9cf4a5 JB |
1689 | if (skb->len < len_rthdr + 2) |
1690 | goto fail; | |
1691 | ||
1692 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1693 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1694 | ||
1695 | if (skb->len < len_rthdr + hdrlen) | |
1696 | goto fail; | |
1697 | ||
f75f5c6f HS |
1698 | /* |
1699 | * Initialize skb->protocol if the injected frame is a data frame | |
1700 | * carrying a rfc1042 header | |
1701 | */ | |
5d9cf4a5 JB |
1702 | if (ieee80211_is_data(hdr->frame_control) && |
1703 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1704 | u8 *payload = (u8 *)hdr + hdrlen; | |
1705 | ||
b203ca39 | 1706 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1707 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1708 | payload[7]); | |
f75f5c6f HS |
1709 | } |
1710 | ||
3b8d81e0 JB |
1711 | memset(info, 0, sizeof(*info)); |
1712 | ||
5d9cf4a5 | 1713 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1714 | IEEE80211_TX_CTL_INJECTED; |
1715 | ||
1716 | /* process and remove the injection radiotap header */ | |
1717 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1718 | goto fail; | |
5d9cf4a5 JB |
1719 | |
1720 | rcu_read_lock(); | |
1721 | ||
1722 | /* | |
1723 | * We process outgoing injected frames that have a local address | |
1724 | * we handle as though they are non-injected frames. | |
1725 | * This code here isn't entirely correct, the local MAC address | |
1726 | * isn't always enough to find the interface to use; for proper | |
1727 | * VLAN/WDS support we will need a different mechanism (which | |
1728 | * likely isn't going to be monitor interfaces). | |
1729 | */ | |
1730 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1731 | ||
1732 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1733 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1734 | continue; | |
1735 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1736 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1737 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1738 | continue; | |
b203ca39 | 1739 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1740 | sdata = tmp_sdata; |
1741 | break; | |
1742 | } | |
1743 | } | |
7351c6bd | 1744 | |
55de908a JB |
1745 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1746 | if (!chanctx_conf) { | |
1747 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1748 | if (tmp_sdata) | |
1749 | chanctx_conf = | |
1750 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1751 | } | |
55de908a | 1752 | |
b4a7ff75 | 1753 | if (chanctx_conf) |
b4932836 | 1754 | chandef = &chanctx_conf->def; |
b4a7ff75 | 1755 | else if (!local->use_chanctx) |
b4932836 | 1756 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
1757 | else |
1758 | goto fail_rcu; | |
55de908a JB |
1759 | |
1760 | /* | |
1761 | * Frame injection is not allowed if beaconing is not allowed | |
1762 | * or if we need radar detection. Beaconing is usually not allowed when | |
1763 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1764 | * Passive scan is also used in world regulatory domains where | |
1765 | * your country is not known and as such it should be treated as | |
1766 | * NO TX unless the channel is explicitly allowed in which case | |
1767 | * your current regulatory domain would not have the passive scan | |
1768 | * flag. | |
1769 | * | |
1770 | * Since AP mode uses monitor interfaces to inject/TX management | |
1771 | * frames we can make AP mode the exception to this rule once it | |
1772 | * supports radar detection as its implementation can deal with | |
1773 | * radar detection by itself. We can do that later by adding a | |
1774 | * monitor flag interfaces used for AP support. | |
1775 | */ | |
b4932836 JD |
1776 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
1777 | sdata->vif.type)) | |
55de908a JB |
1778 | goto fail_rcu; |
1779 | ||
73c4e195 | 1780 | info->band = chandef->chan->band; |
7c10770f | 1781 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
1782 | rcu_read_unlock(); |
1783 | ||
e2ebc74d | 1784 | return NETDEV_TX_OK; |
9b8a74e3 | 1785 | |
55de908a JB |
1786 | fail_rcu: |
1787 | rcu_read_unlock(); | |
9b8a74e3 AG |
1788 | fail: |
1789 | dev_kfree_skb(skb); | |
1790 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1791 | } |
1792 | ||
97ffe757 | 1793 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 1794 | { |
97ffe757 | 1795 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 1796 | |
97ffe757 JB |
1797 | return ethertype == ETH_P_TDLS && |
1798 | skb->len > 14 && | |
1799 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
1800 | } | |
1801 | ||
1802 | static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, | |
1803 | struct sk_buff *skb, | |
1804 | struct sta_info **sta_out) | |
1805 | { | |
1806 | struct sta_info *sta; | |
1807 | ||
1808 | switch (sdata->vif.type) { | |
1809 | case NL80211_IFTYPE_AP_VLAN: | |
1810 | sta = rcu_dereference(sdata->u.vlan.sta); | |
1811 | if (sta) { | |
1812 | *sta_out = sta; | |
1813 | return 0; | |
1814 | } else if (sdata->wdev.use_4addr) { | |
1815 | return -ENOLINK; | |
1816 | } | |
1817 | /* fall through */ | |
1818 | case NL80211_IFTYPE_AP: | |
1819 | case NL80211_IFTYPE_OCB: | |
1820 | case NL80211_IFTYPE_ADHOC: | |
1821 | if (is_multicast_ether_addr(skb->data)) { | |
1822 | *sta_out = ERR_PTR(-ENOENT); | |
1823 | return 0; | |
1824 | } | |
1825 | sta = sta_info_get_bss(sdata, skb->data); | |
1826 | break; | |
1827 | case NL80211_IFTYPE_WDS: | |
1828 | sta = sta_info_get(sdata, sdata->u.wds.remote_addr); | |
1829 | break; | |
1830 | #ifdef CONFIG_MAC80211_MESH | |
1831 | case NL80211_IFTYPE_MESH_POINT: | |
1832 | /* determined much later */ | |
1833 | *sta_out = NULL; | |
1834 | return 0; | |
1835 | #endif | |
1836 | case NL80211_IFTYPE_STATION: | |
1837 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
1838 | sta = sta_info_get(sdata, skb->data); | |
1839 | if (sta) { | |
1840 | bool tdls_peer, tdls_auth; | |
1841 | ||
1842 | tdls_peer = test_sta_flag(sta, | |
1843 | WLAN_STA_TDLS_PEER); | |
1844 | tdls_auth = test_sta_flag(sta, | |
1845 | WLAN_STA_TDLS_PEER_AUTH); | |
1846 | ||
1847 | if (tdls_peer && tdls_auth) { | |
1848 | *sta_out = sta; | |
1849 | return 0; | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * TDLS link during setup - throw out frames to | |
1854 | * peer. Allow TDLS-setup frames to unauthorized | |
1855 | * peers for the special case of a link teardown | |
1856 | * after a TDLS sta is removed due to being | |
1857 | * unreachable. | |
1858 | */ | |
1859 | if (tdls_peer && !tdls_auth && | |
1860 | !ieee80211_is_tdls_setup(skb)) | |
1861 | return -EINVAL; | |
1862 | } | |
1863 | ||
1864 | } | |
1865 | ||
1866 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
1867 | if (!sta) | |
1868 | return -ENOLINK; | |
1869 | break; | |
1870 | default: | |
1871 | return -EINVAL; | |
1872 | } | |
1873 | ||
1874 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
1875 | return 0; | |
ad38bfc9 MG |
1876 | } |
1877 | ||
e2ebc74d | 1878 | /** |
4c9451ed JB |
1879 | * ieee80211_build_hdr - build 802.11 header in the given frame |
1880 | * @sdata: virtual interface to build the header for | |
1881 | * @skb: the skb to build the header in | |
24d342c5 | 1882 | * @info_flags: skb flags to set |
e2ebc74d | 1883 | * |
4c9451ed JB |
1884 | * This function takes the skb with 802.3 header and reformats the header to |
1885 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
1886 | * being transmitted on. | |
1887 | * | |
1888 | * Note that this function also takes care of the TX status request and | |
1889 | * potential unsharing of the SKB - this needs to be interleaved with the | |
1890 | * header building. | |
e2ebc74d | 1891 | * |
4c9451ed JB |
1892 | * The function requires the read-side RCU lock held |
1893 | * | |
1894 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 1895 | */ |
4c9451ed | 1896 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 1897 | struct sk_buff *skb, u32 info_flags, |
97ffe757 | 1898 | struct sta_info *sta) |
e2ebc74d | 1899 | { |
133b8226 | 1900 | struct ieee80211_local *local = sdata->local; |
489ee919 | 1901 | struct ieee80211_tx_info *info; |
dcf33963 | 1902 | int head_need; |
065e9605 HH |
1903 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1904 | __le16 fc; | |
e2ebc74d | 1905 | struct ieee80211_hdr hdr; |
ff67bb86 | 1906 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1907 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1908 | const u8 *encaps_data; |
1909 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1910 | int nh_pos, h_pos; |
97ffe757 JB |
1911 | bool wme_sta = false, authorized = false; |
1912 | bool tdls_peer; | |
a729cff8 | 1913 | bool multicast; |
a729cff8 | 1914 | u16 info_id = 0; |
55de908a JB |
1915 | struct ieee80211_chanctx_conf *chanctx_conf; |
1916 | struct ieee80211_sub_if_data *ap_sdata; | |
1917 | enum ieee80211_band band; | |
4c9451ed | 1918 | int ret; |
e2ebc74d | 1919 | |
97ffe757 JB |
1920 | if (IS_ERR(sta)) |
1921 | sta = NULL; | |
1922 | ||
e2ebc74d JB |
1923 | /* convert Ethernet header to proper 802.11 header (based on |
1924 | * operation mode) */ | |
1925 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1926 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1927 | |
51fb61e7 | 1928 | switch (sdata->vif.type) { |
05c914fe | 1929 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 1930 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
1931 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
1932 | /* RA TA DA SA */ | |
1933 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1934 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1935 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1936 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1937 | hdrlen = 30; | |
c2c98fde | 1938 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 1939 | wme_sta = sta->sta.wme; |
f14543ee | 1940 | } |
55de908a JB |
1941 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1942 | u.ap); | |
1943 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
1944 | if (!chanctx_conf) { |
1945 | ret = -ENOTCONN; | |
1946 | goto free; | |
1947 | } | |
4bf88530 | 1948 | band = chanctx_conf->def.chan->band; |
97ffe757 | 1949 | if (sdata->wdev.use_4addr) |
f14543ee FF |
1950 | break; |
1951 | /* fall through */ | |
1952 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1953 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1954 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
1955 | if (!chanctx_conf) { |
1956 | ret = -ENOTCONN; | |
1957 | goto free; | |
1958 | } | |
065e9605 | 1959 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1960 | /* DA BSSID SA */ |
1961 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1962 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1963 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1964 | hdrlen = 24; | |
4bf88530 | 1965 | band = chanctx_conf->def.chan->band; |
cf966838 | 1966 | break; |
05c914fe | 1967 | case NL80211_IFTYPE_WDS: |
065e9605 | 1968 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1969 | /* RA TA DA SA */ |
1970 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1971 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1972 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1973 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1974 | hdrlen = 30; | |
55de908a JB |
1975 | /* |
1976 | * This is the exception! WDS style interfaces are prohibited | |
1977 | * when channel contexts are in used so this must be valid | |
1978 | */ | |
675a0b04 | 1979 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 1980 | break; |
33b64eb2 | 1981 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1982 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 1983 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1984 | struct sta_info *next_hop; |
1985 | bool mpp_lookup = true; | |
1986 | ||
bf7cd94d | 1987 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1988 | if (mpath) { |
1989 | mpp_lookup = false; | |
1990 | next_hop = rcu_dereference(mpath->next_hop); | |
1991 | if (!next_hop || | |
1992 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1993 | MESH_PATH_RESOLVING))) | |
1994 | mpp_lookup = true; | |
1995 | } | |
1996 | ||
1997 | if (mpp_lookup) | |
bf7cd94d | 1998 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1999 | |
2000 | if (mppath && mpath) | |
2001 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 2002 | } |
79617dee | 2003 | |
f76b57b4 | 2004 | /* |
9d52501b JF |
2005 | * Use address extension if it is a packet from |
2006 | * another interface or if we know the destination | |
2007 | * is being proxied by a portal (i.e. portal address | |
2008 | * differs from proxied address) | |
f76b57b4 | 2009 | */ |
b203ca39 JP |
2010 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2011 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2012 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2013 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2014 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2015 | NULL, NULL); | |
79617dee | 2016 | } else { |
27f01124 TP |
2017 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2018 | * For unicast with unknown forwarding information, | |
2019 | * destination might be in the MBSS or if that fails | |
2020 | * forwarded to another mesh gate. In either case | |
2021 | * resolution will be handled in ieee80211_xmit(), so | |
2022 | * leave the original DA. This also works for mcast */ | |
2023 | const u8 *mesh_da = skb->data; | |
2024 | ||
2025 | if (mppath) | |
2026 | mesh_da = mppath->mpp; | |
2027 | else if (mpath) | |
2028 | mesh_da = mpath->dst; | |
79617dee | 2029 | |
3c5772a5 | 2030 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2031 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2032 | if (is_multicast_ether_addr(mesh_da)) |
2033 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2034 | meshhdrlen = ieee80211_new_mesh_header( |
2035 | sdata, &mesh_hdr, | |
2036 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2037 | else |
27f01124 | 2038 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2039 | meshhdrlen = ieee80211_new_mesh_header( |
2040 | sdata, &mesh_hdr, skb->data, | |
2041 | skb->data + ETH_ALEN); | |
79617dee | 2042 | |
79617dee | 2043 | } |
55de908a | 2044 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2045 | if (!chanctx_conf) { |
2046 | ret = -ENOTCONN; | |
2047 | goto free; | |
2048 | } | |
4bf88530 | 2049 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
2050 | break; |
2051 | #endif | |
05c914fe | 2052 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2053 | /* we already did checks when looking up the RA STA */ |
2054 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2055 | |
97ffe757 | 2056 | if (tdls_peer) { |
941c93cd AN |
2057 | /* DA SA BSSID */ |
2058 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2059 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2060 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2061 | hdrlen = 24; | |
2062 | } else if (sdata->u.mgd.use_4addr && | |
2063 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2064 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2065 | IEEE80211_FCTL_TODS); | |
f14543ee | 2066 | /* RA TA DA SA */ |
941c93cd | 2067 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2068 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2069 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2070 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2071 | hdrlen = 30; | |
2072 | } else { | |
2073 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2074 | /* BSSID SA DA */ | |
941c93cd | 2075 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2076 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2077 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2078 | hdrlen = 24; | |
2079 | } | |
55de908a | 2080 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2081 | if (!chanctx_conf) { |
2082 | ret = -ENOTCONN; | |
2083 | goto free; | |
2084 | } | |
4bf88530 | 2085 | band = chanctx_conf->def.chan->band; |
cf966838 | 2086 | break; |
239281f8 RL |
2087 | case NL80211_IFTYPE_OCB: |
2088 | /* DA SA BSSID */ | |
2089 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2090 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2091 | eth_broadcast_addr(hdr.addr3); | |
2092 | hdrlen = 24; | |
2093 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2094 | if (!chanctx_conf) { |
2095 | ret = -ENOTCONN; | |
2096 | goto free; | |
2097 | } | |
239281f8 RL |
2098 | band = chanctx_conf->def.chan->band; |
2099 | break; | |
05c914fe | 2100 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2101 | /* DA SA BSSID */ |
2102 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2103 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2104 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2105 | hdrlen = 24; |
55de908a | 2106 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2107 | if (!chanctx_conf) { |
2108 | ret = -ENOTCONN; | |
2109 | goto free; | |
2110 | } | |
4bf88530 | 2111 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2112 | break; |
2113 | default: | |
4c9451ed JB |
2114 | ret = -EINVAL; |
2115 | goto free; | |
e2ebc74d JB |
2116 | } |
2117 | ||
a729cff8 | 2118 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2119 | |
97ffe757 JB |
2120 | /* sta is always NULL for mesh */ |
2121 | if (sta) { | |
2122 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2123 | wme_sta = sta->sta.wme; | |
2124 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2125 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2126 | wme_sta = true; |
97ffe757 | 2127 | } |
4777be41 | 2128 | |
527871d7 JB |
2129 | /* receiver does QoS (which also means we do) use it */ |
2130 | if (wme_sta) { | |
065e9605 | 2131 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2132 | hdrlen += 2; |
2133 | } | |
2134 | ||
2135 | /* | |
238814fd JB |
2136 | * Drop unicast frames to unauthorised stations unless they are |
2137 | * EAPOL frames from the local station. | |
ce3edf6d | 2138 | */ |
55182e4a | 2139 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2140 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2141 | !multicast && !authorized && |
55182e4a | 2142 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2143 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2144 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2145 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2146 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2147 | #endif |
2148 | ||
2149 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2150 | ||
4c9451ed JB |
2151 | ret = -EPERM; |
2152 | goto free; | |
ce3edf6d JB |
2153 | } |
2154 | ||
a729cff8 JB |
2155 | if (unlikely(!multicast && skb->sk && |
2156 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2157 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2158 | |
bf7fa551 | 2159 | if (ack_skb) { |
a729cff8 | 2160 | unsigned long flags; |
9475af6e | 2161 | int id; |
a729cff8 JB |
2162 | |
2163 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2164 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2165 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2166 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2167 | ||
9475af6e | 2168 | if (id >= 0) { |
a729cff8 JB |
2169 | info_id = id; |
2170 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2171 | } else { |
bf7fa551 | 2172 | kfree_skb(ack_skb); |
a729cff8 | 2173 | } |
a729cff8 JB |
2174 | } |
2175 | } | |
2176 | ||
7e244707 HS |
2177 | /* |
2178 | * If the skb is shared we need to obtain our own copy. | |
2179 | */ | |
2180 | if (skb_shared(skb)) { | |
a729cff8 JB |
2181 | struct sk_buff *tmp_skb = skb; |
2182 | ||
2183 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2184 | WARN_ON(info_id); | |
2185 | ||
f8a0a781 | 2186 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2187 | kfree_skb(tmp_skb); |
2188 | ||
4c9451ed JB |
2189 | if (!skb) { |
2190 | ret = -ENOMEM; | |
2191 | goto free; | |
2192 | } | |
7e244707 HS |
2193 | } |
2194 | ||
065e9605 | 2195 | hdr.frame_control = fc; |
e2ebc74d JB |
2196 | hdr.duration_id = 0; |
2197 | hdr.seq_ctrl = 0; | |
2198 | ||
2199 | skip_header_bytes = ETH_HLEN; | |
2200 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2201 | encaps_data = bridge_tunnel_header; | |
2202 | encaps_len = sizeof(bridge_tunnel_header); | |
2203 | skip_header_bytes -= 2; | |
e5c5d22e | 2204 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2205 | encaps_data = rfc1042_header; |
2206 | encaps_len = sizeof(rfc1042_header); | |
2207 | skip_header_bytes -= 2; | |
2208 | } else { | |
2209 | encaps_data = NULL; | |
2210 | encaps_len = 0; | |
2211 | } | |
2212 | ||
7e244707 HS |
2213 | nh_pos = skb_network_header(skb) - skb->data; |
2214 | h_pos = skb_transport_header(skb) - skb->data; | |
2215 | ||
e2ebc74d JB |
2216 | skb_pull(skb, skip_header_bytes); |
2217 | nh_pos -= skip_header_bytes; | |
2218 | h_pos -= skip_header_bytes; | |
2219 | ||
23c0752a | 2220 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2221 | |
23c0752a JB |
2222 | /* |
2223 | * So we need to modify the skb header and hence need a copy of | |
2224 | * that. The head_need variable above doesn't, so far, include | |
2225 | * the needed header space that we don't need right away. If we | |
2226 | * can, then we don't reallocate right now but only after the | |
2227 | * frame arrives at the master device (if it does...) | |
2228 | * | |
2229 | * If we cannot, however, then we will reallocate to include all | |
2230 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2231 | * make it big enough for everything we may ever need. | |
2232 | */ | |
e2ebc74d | 2233 | |
3a5be7d4 | 2234 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2235 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2236 | head_need += local->tx_headroom; |
2237 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2238 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2239 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2240 | skb = NULL; |
4c9451ed | 2241 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2242 | } |
e2ebc74d JB |
2243 | } |
2244 | ||
2245 | if (encaps_data) { | |
2246 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2247 | nh_pos += encaps_len; | |
2248 | h_pos += encaps_len; | |
2249 | } | |
c29b9b9b | 2250 | |
e4ab7eb0 | 2251 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2252 | if (meshhdrlen > 0) { |
2253 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2254 | nh_pos += meshhdrlen; | |
2255 | h_pos += meshhdrlen; | |
2256 | } | |
e4ab7eb0 | 2257 | #endif |
33b64eb2 | 2258 | |
065e9605 | 2259 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2260 | __le16 *qos_control; |
2261 | ||
f359d3fe | 2262 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2263 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2264 | /* | |
2265 | * Maybe we could actually set some fields here, for now just | |
2266 | * initialise to zero to indicate no special operation. | |
2267 | */ | |
2268 | *qos_control = 0; | |
2269 | } else | |
2270 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2271 | ||
e2ebc74d JB |
2272 | nh_pos += hdrlen; |
2273 | h_pos += hdrlen; | |
2274 | ||
e2ebc74d JB |
2275 | /* Update skb pointers to various headers since this modified frame |
2276 | * is going to go through Linux networking code that may potentially | |
2277 | * need things like pointer to IP header. */ | |
2278 | skb_set_mac_header(skb, 0); | |
2279 | skb_set_network_header(skb, nh_pos); | |
2280 | skb_set_transport_header(skb, h_pos); | |
2281 | ||
489ee919 | 2282 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2283 | memset(info, 0, sizeof(*info)); |
2284 | ||
a729cff8 JB |
2285 | info->flags = info_flags; |
2286 | info->ack_frame_id = info_id; | |
73c4e195 | 2287 | info->band = band; |
a729cff8 | 2288 | |
4c9451ed JB |
2289 | return skb; |
2290 | free: | |
2291 | kfree_skb(skb); | |
2292 | return ERR_PTR(ret); | |
2293 | } | |
2294 | ||
2295 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, | |
2296 | struct net_device *dev, | |
2297 | u32 info_flags) | |
2298 | { | |
2299 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
97ffe757 | 2300 | struct sta_info *sta; |
4c9451ed JB |
2301 | |
2302 | if (unlikely(skb->len < ETH_HLEN)) { | |
2303 | kfree_skb(skb); | |
2304 | return; | |
2305 | } | |
2306 | ||
2307 | rcu_read_lock(); | |
e2ebc74d | 2308 | |
97ffe757 JB |
2309 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
2310 | kfree_skb(skb); | |
2311 | goto out; | |
2312 | } | |
4c9451ed | 2313 | |
97ffe757 | 2314 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); |
4c9451ed JB |
2315 | if (IS_ERR(skb)) |
2316 | goto out; | |
2317 | ||
2318 | dev->stats.tx_packets++; | |
2319 | dev->stats.tx_bytes += skb->len; | |
2320 | dev->trans_start = jiffies; | |
e2ebc74d | 2321 | |
7c10770f | 2322 | ieee80211_xmit(sdata, sta, skb); |
4c9451ed | 2323 | out: |
55de908a | 2324 | rcu_read_unlock(); |
e2ebc74d JB |
2325 | } |
2326 | ||
4c9451ed JB |
2327 | /** |
2328 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
2329 | * @skb: packet to be sent | |
2330 | * @dev: incoming interface | |
2331 | * | |
2332 | * On failure skb will be freed. | |
2333 | */ | |
24d342c5 LK |
2334 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
2335 | struct net_device *dev) | |
2336 | { | |
2337 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
2338 | return NETDEV_TX_OK; | |
2339 | } | |
e2ebc74d | 2340 | |
7528ec57 JB |
2341 | struct sk_buff * |
2342 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
2343 | struct sk_buff *skb, u32 info_flags) | |
2344 | { | |
2345 | struct ieee80211_hdr *hdr; | |
2346 | struct ieee80211_tx_data tx = { | |
2347 | .local = sdata->local, | |
2348 | .sdata = sdata, | |
2349 | }; | |
97ffe757 | 2350 | struct sta_info *sta; |
7528ec57 JB |
2351 | |
2352 | rcu_read_lock(); | |
2353 | ||
97ffe757 JB |
2354 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
2355 | kfree_skb(skb); | |
2356 | skb = ERR_PTR(-EINVAL); | |
2357 | goto out; | |
2358 | } | |
2359 | ||
2360 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
7528ec57 JB |
2361 | if (IS_ERR(skb)) |
2362 | goto out; | |
2363 | ||
2364 | hdr = (void *)skb->data; | |
2365 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
2366 | tx.skb = skb; | |
2367 | ||
2368 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
2369 | rcu_read_unlock(); | |
2370 | kfree_skb(skb); | |
2371 | return ERR_PTR(-EINVAL); | |
2372 | } | |
2373 | ||
2374 | out: | |
2375 | rcu_read_unlock(); | |
2376 | return skb; | |
2377 | } | |
2378 | ||
e2530083 JB |
2379 | /* |
2380 | * ieee80211_clear_tx_pending may not be called in a context where | |
2381 | * it is possible that it packets could come in again. | |
2382 | */ | |
e2ebc74d JB |
2383 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2384 | { | |
1f98ab7f | 2385 | struct sk_buff *skb; |
2de8e0d9 | 2386 | int i; |
e2ebc74d | 2387 | |
1f98ab7f FF |
2388 | for (i = 0; i < local->hw.queues; i++) { |
2389 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2390 | ieee80211_free_txskb(&local->hw, skb); | |
2391 | } | |
e2ebc74d JB |
2392 | } |
2393 | ||
7bb45683 JB |
2394 | /* |
2395 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2396 | * which in this case means re-queued -- take as an indication to stop sending | |
2397 | * more pending frames. | |
2398 | */ | |
cd8ffc80 JB |
2399 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2400 | struct sk_buff *skb) | |
2401 | { | |
2402 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2403 | struct ieee80211_sub_if_data *sdata; | |
2404 | struct sta_info *sta; | |
2405 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2406 | bool result; |
55de908a | 2407 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2408 | |
5061b0c2 | 2409 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2410 | |
2411 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2412 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2413 | if (unlikely(!chanctx_conf)) { | |
2414 | dev_kfree_skb(skb); | |
2415 | return true; | |
2416 | } | |
73c4e195 | 2417 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 2418 | result = ieee80211_tx(sdata, NULL, skb, true); |
cd8ffc80 | 2419 | } else { |
252b86c4 JB |
2420 | struct sk_buff_head skbs; |
2421 | ||
2422 | __skb_queue_head_init(&skbs); | |
2423 | __skb_queue_tail(&skbs, skb); | |
2424 | ||
cd8ffc80 | 2425 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2426 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2427 | |
74e4dbfd | 2428 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2429 | } |
2430 | ||
cd8ffc80 JB |
2431 | return result; |
2432 | } | |
2433 | ||
e2530083 | 2434 | /* |
3b8d81e0 | 2435 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2436 | */ |
e2ebc74d JB |
2437 | void ieee80211_tx_pending(unsigned long data) |
2438 | { | |
2439 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2440 | unsigned long flags; |
cd8ffc80 | 2441 | int i; |
3b8d81e0 | 2442 | bool txok; |
e2ebc74d | 2443 | |
f0e72851 | 2444 | rcu_read_lock(); |
e2530083 | 2445 | |
3b8d81e0 | 2446 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2447 | for (i = 0; i < local->hw.queues; i++) { |
2448 | /* | |
2449 | * If queue is stopped by something other than due to pending | |
2450 | * frames, or we have no pending frames, proceed to next queue. | |
2451 | */ | |
3b8d81e0 | 2452 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2453 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2454 | continue; |
e2530083 | 2455 | |
2a577d98 | 2456 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2457 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2458 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2459 | |
a7bc376c | 2460 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2461 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2462 | continue; |
2463 | } | |
2464 | ||
3b8d81e0 JB |
2465 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2466 | flags); | |
2467 | ||
2468 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2469 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2470 | flags); | |
2471 | if (!txok) | |
2a577d98 | 2472 | break; |
e2ebc74d | 2473 | } |
7236fe29 JB |
2474 | |
2475 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2476 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2477 | } |
3b8d81e0 | 2478 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2479 | |
f0e72851 | 2480 | rcu_read_unlock(); |
e2ebc74d JB |
2481 | } |
2482 | ||
2483 | /* functions for drivers to get certain frames */ | |
2484 | ||
eac70c13 | 2485 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2486 | struct ps_data *ps, struct sk_buff *skb, |
2487 | bool is_template) | |
e2ebc74d JB |
2488 | { |
2489 | u8 *pos, *tim; | |
2490 | int aid0 = 0; | |
2491 | int i, have_bits = 0, n1, n2; | |
2492 | ||
2493 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2494 | * mode. */ | |
d012a605 | 2495 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2496 | /* in the hope that this is faster than |
2497 | * checking byte-for-byte */ | |
f359d3fe | 2498 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 2499 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
2500 | if (!is_template) { |
2501 | if (ps->dtim_count == 0) | |
2502 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
2503 | else | |
2504 | ps->dtim_count--; | |
2505 | } | |
e2ebc74d JB |
2506 | |
2507 | tim = pos = (u8 *) skb_put(skb, 6); | |
2508 | *pos++ = WLAN_EID_TIM; | |
2509 | *pos++ = 4; | |
d012a605 | 2510 | *pos++ = ps->dtim_count; |
8860020e | 2511 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2512 | |
d012a605 | 2513 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2514 | aid0 = 1; |
2515 | ||
d012a605 | 2516 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2517 | |
e2ebc74d JB |
2518 | if (have_bits) { |
2519 | /* Find largest even number N1 so that bits numbered 1 through | |
2520 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2521 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2522 | n1 = 0; | |
2523 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2524 | if (ps->tim[i]) { |
e2ebc74d JB |
2525 | n1 = i & 0xfe; |
2526 | break; | |
2527 | } | |
2528 | } | |
2529 | n2 = n1; | |
2530 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2531 | if (ps->tim[i]) { |
e2ebc74d JB |
2532 | n2 = i; |
2533 | break; | |
2534 | } | |
2535 | } | |
2536 | ||
2537 | /* Bitmap control */ | |
2538 | *pos++ = n1 | aid0; | |
2539 | /* Part Virt Bitmap */ | |
5220da39 | 2540 | skb_put(skb, n2 - n1); |
d012a605 | 2541 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2542 | |
2543 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2544 | } else { |
2545 | *pos++ = aid0; /* Bitmap control */ | |
2546 | *pos++ = 0; /* Part Virt Bitmap */ | |
2547 | } | |
e2ebc74d JB |
2548 | } |
2549 | ||
eac70c13 | 2550 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2551 | struct ps_data *ps, struct sk_buff *skb, |
2552 | bool is_template) | |
eac70c13 MP |
2553 | { |
2554 | struct ieee80211_local *local = sdata->local; | |
2555 | ||
2556 | /* | |
2557 | * Not very nice, but we want to allow the driver to call | |
2558 | * ieee80211_beacon_get() as a response to the set_tim() | |
2559 | * callback. That, however, is already invoked under the | |
2560 | * sta_lock to guarantee consistent and race-free update | |
2561 | * of the tim bitmap in mac80211 and the driver. | |
2562 | */ | |
2563 | if (local->tim_in_locked_section) { | |
6ec8c332 | 2564 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 2565 | } else { |
1b91731d | 2566 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 2567 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 2568 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2569 | } |
2570 | ||
2571 | return 0; | |
2572 | } | |
2573 | ||
1af586c9 AO |
2574 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
2575 | struct beacon_data *beacon) | |
73da7d5b SW |
2576 | { |
2577 | struct probe_resp *resp; | |
cd7760e6 SW |
2578 | u8 *beacon_data; |
2579 | size_t beacon_data_len; | |
0d06d9ba | 2580 | int i; |
af296bdb | 2581 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
2582 | |
2583 | switch (sdata->vif.type) { | |
2584 | case NL80211_IFTYPE_AP: | |
2585 | beacon_data = beacon->tail; | |
2586 | beacon_data_len = beacon->tail_len; | |
2587 | break; | |
2588 | case NL80211_IFTYPE_ADHOC: | |
2589 | beacon_data = beacon->head; | |
2590 | beacon_data_len = beacon->head_len; | |
2591 | break; | |
b8456a14 CYY |
2592 | case NL80211_IFTYPE_MESH_POINT: |
2593 | beacon_data = beacon->head; | |
2594 | beacon_data_len = beacon->head_len; | |
2595 | break; | |
cd7760e6 SW |
2596 | default: |
2597 | return; | |
2598 | } | |
73da7d5b | 2599 | |
af296bdb | 2600 | rcu_read_lock(); |
0d06d9ba | 2601 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 2602 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 2603 | |
af296bdb MK |
2604 | if (beacon->csa_counter_offsets[i]) { |
2605 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
2606 | beacon_data_len)) { | |
0d06d9ba AO |
2607 | rcu_read_unlock(); |
2608 | return; | |
2609 | } | |
af296bdb MK |
2610 | |
2611 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 2612 | } |
af296bdb MK |
2613 | |
2614 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
2615 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 2616 | } |
af296bdb | 2617 | rcu_read_unlock(); |
1af586c9 AO |
2618 | } |
2619 | ||
2620 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) | |
2621 | { | |
2622 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
2623 | struct beacon_data *beacon = NULL; |
2624 | u8 count = 0; | |
0d06d9ba | 2625 | |
af296bdb MK |
2626 | rcu_read_lock(); |
2627 | ||
2628 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
2629 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
2630 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2631 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
2632 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
2633 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
2634 | ||
2635 | if (!beacon) | |
2636 | goto unlock; | |
2637 | ||
2638 | beacon->csa_current_counter--; | |
1af586c9 AO |
2639 | |
2640 | /* the counter should never reach 0 */ | |
af296bdb MK |
2641 | WARN_ON_ONCE(!beacon->csa_current_counter); |
2642 | count = beacon->csa_current_counter; | |
1af586c9 | 2643 | |
af296bdb MK |
2644 | unlock: |
2645 | rcu_read_unlock(); | |
2646 | return count; | |
73da7d5b | 2647 | } |
1af586c9 | 2648 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
2649 | |
2650 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
2651 | { | |
2652 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2653 | struct beacon_data *beacon = NULL; | |
2654 | u8 *beacon_data; | |
2655 | size_t beacon_data_len; | |
73da7d5b SW |
2656 | int ret = false; |
2657 | ||
2658 | if (!ieee80211_sdata_running(sdata)) | |
2659 | return false; | |
2660 | ||
2661 | rcu_read_lock(); | |
2662 | if (vif->type == NL80211_IFTYPE_AP) { | |
2663 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
2664 | ||
2665 | beacon = rcu_dereference(ap->beacon); | |
2666 | if (WARN_ON(!beacon || !beacon->tail)) | |
2667 | goto out; | |
2668 | beacon_data = beacon->tail; | |
2669 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
2670 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
2671 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
2672 | ||
2673 | beacon = rcu_dereference(ifibss->presp); | |
2674 | if (!beacon) | |
2675 | goto out; | |
2676 | ||
b8456a14 CYY |
2677 | beacon_data = beacon->head; |
2678 | beacon_data_len = beacon->head_len; | |
2679 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
2680 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
2681 | ||
2682 | beacon = rcu_dereference(ifmsh->beacon); | |
2683 | if (!beacon) | |
2684 | goto out; | |
2685 | ||
cd7760e6 SW |
2686 | beacon_data = beacon->head; |
2687 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
2688 | } else { |
2689 | WARN_ON(1); | |
2690 | goto out; | |
2691 | } | |
2692 | ||
10d78f27 MK |
2693 | if (!beacon->csa_counter_offsets[0]) |
2694 | goto out; | |
2695 | ||
af296bdb | 2696 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
2697 | goto out; |
2698 | ||
af296bdb | 2699 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
2700 | ret = true; |
2701 | out: | |
2702 | rcu_read_unlock(); | |
2703 | ||
2704 | return ret; | |
2705 | } | |
2706 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
2707 | ||
6ec8c332 AO |
2708 | static struct sk_buff * |
2709 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
2710 | struct ieee80211_vif *vif, | |
2711 | struct ieee80211_mutable_offsets *offs, | |
2712 | bool is_template) | |
e2ebc74d JB |
2713 | { |
2714 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 2715 | struct beacon_data *beacon = NULL; |
9d139c81 | 2716 | struct sk_buff *skb = NULL; |
e039fa4a | 2717 | struct ieee80211_tx_info *info; |
e2ebc74d | 2718 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2719 | enum ieee80211_band band; |
e00cfce0 | 2720 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2721 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 2722 | int csa_off_base = 0; |
8318d78a | 2723 | |
5dfdaf58 | 2724 | rcu_read_lock(); |
e2ebc74d | 2725 | |
32bfd35d | 2726 | sdata = vif_to_sdata(vif); |
55de908a | 2727 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2728 | |
55de908a | 2729 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2730 | goto out; |
2731 | ||
6ec8c332 AO |
2732 | if (offs) |
2733 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 2734 | |
05c914fe | 2735 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 2736 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 2737 | |
af296bdb | 2738 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 2739 | if (beacon) { |
10d78f27 | 2740 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2741 | if (!is_template) |
2742 | ieee80211_csa_update_counter(vif); | |
2743 | ||
2744 | ieee80211_set_csa(sdata, beacon); | |
2745 | } | |
73da7d5b | 2746 | |
902acc78 JB |
2747 | /* |
2748 | * headroom, head length, | |
2749 | * tail length and maximum TIM length | |
2750 | */ | |
2751 | skb = dev_alloc_skb(local->tx_headroom + | |
2752 | beacon->head_len + | |
70dabeb7 FF |
2753 | beacon->tail_len + 256 + |
2754 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
2755 | if (!skb) |
2756 | goto out; | |
33b64eb2 | 2757 | |
902acc78 JB |
2758 | skb_reserve(skb, local->tx_headroom); |
2759 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2760 | beacon->head_len); | |
33b64eb2 | 2761 | |
6ec8c332 AO |
2762 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
2763 | is_template); | |
33b64eb2 | 2764 | |
6ec8c332 AO |
2765 | if (offs) { |
2766 | offs->tim_offset = beacon->head_len; | |
2767 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
2768 | |
2769 | /* for AP the csa offsets are from tail */ | |
2770 | csa_off_base = skb->len; | |
6ec8c332 | 2771 | } |
eddcbb94 | 2772 | |
902acc78 JB |
2773 | if (beacon->tail) |
2774 | memcpy(skb_put(skb, beacon->tail_len), | |
2775 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2776 | } else |
2777 | goto out; | |
05c914fe | 2778 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2779 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2780 | struct ieee80211_hdr *hdr; |
33b64eb2 | 2781 | |
af296bdb MK |
2782 | beacon = rcu_dereference(ifibss->presp); |
2783 | if (!beacon) | |
9d139c81 JB |
2784 | goto out; |
2785 | ||
10d78f27 | 2786 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2787 | if (!is_template) |
2788 | ieee80211_csa_update_counter(vif); | |
cd7760e6 | 2789 | |
af296bdb | 2790 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2791 | } |
cd7760e6 | 2792 | |
af296bdb | 2793 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 2794 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
2795 | if (!skb) |
2796 | goto out; | |
c3ffeab4 | 2797 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2798 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2799 | beacon->head_len); | |
9d139c81 JB |
2800 | |
2801 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2802 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2803 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2804 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2805 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 2806 | |
af296bdb MK |
2807 | beacon = rcu_dereference(ifmsh->beacon); |
2808 | if (!beacon) | |
ac1bd846 | 2809 | goto out; |
ac1bd846 | 2810 | |
10d78f27 | 2811 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
2812 | if (!is_template) |
2813 | /* TODO: For mesh csa_counter is in TU, so | |
2814 | * decrementing it by one isn't correct, but | |
2815 | * for now we leave it consistent with overall | |
2816 | * mac80211's behavior. | |
2817 | */ | |
2818 | ieee80211_csa_update_counter(vif); | |
2819 | ||
af296bdb | 2820 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2821 | } |
b8456a14 | 2822 | |
dbf498fb | 2823 | if (ifmsh->sync_ops) |
af296bdb | 2824 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
dbf498fb | 2825 | |
3b69a9c5 | 2826 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 2827 | beacon->head_len + |
3f52b7e3 | 2828 | 256 + /* TIM IE */ |
af296bdb | 2829 | beacon->tail_len + |
70dabeb7 | 2830 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
2831 | if (!skb) |
2832 | goto out; | |
2b5e1967 | 2833 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2834 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2835 | beacon->head_len); | |
6ec8c332 AO |
2836 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
2837 | ||
2838 | if (offs) { | |
af296bdb MK |
2839 | offs->tim_offset = beacon->head_len; |
2840 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
2841 | } |
2842 | ||
af296bdb MK |
2843 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
2844 | beacon->tail_len); | |
9d139c81 JB |
2845 | } else { |
2846 | WARN_ON(1); | |
5dfdaf58 | 2847 | goto out; |
e2ebc74d JB |
2848 | } |
2849 | ||
1af586c9 | 2850 | /* CSA offsets */ |
af296bdb | 2851 | if (offs && beacon) { |
1af586c9 AO |
2852 | int i; |
2853 | ||
2854 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 2855 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
2856 | |
2857 | if (!csa_off) | |
2858 | continue; | |
2859 | ||
2860 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
2861 | } | |
2862 | } | |
2863 | ||
4bf88530 | 2864 | band = chanctx_conf->def.chan->band; |
55de908a | 2865 | |
e039fa4a JB |
2866 | info = IEEE80211_SKB_CB(skb); |
2867 | ||
3b8d81e0 | 2868 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2869 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2870 | info->band = band; |
e00cfce0 JM |
2871 | |
2872 | memset(&txrc, 0, sizeof(txrc)); | |
2873 | txrc.hw = hw; | |
e31583cd | 2874 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2875 | txrc.bss_conf = &sdata->vif.bss_conf; |
2876 | txrc.skb = skb; | |
2877 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2878 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2879 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2880 | txrc.max_rate_idx = -1; |
2881 | else | |
2882 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2883 | txrc.bss = true; |
e00cfce0 | 2884 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2885 | |
2886 | info->control.vif = vif; | |
f591fa5d | 2887 | |
a472e71b JL |
2888 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2889 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2890 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2891 | out: |
5dfdaf58 | 2892 | rcu_read_unlock(); |
e2ebc74d | 2893 | return skb; |
6ec8c332 AO |
2894 | |
2895 | } | |
2896 | ||
2897 | struct sk_buff * | |
2898 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
2899 | struct ieee80211_vif *vif, | |
2900 | struct ieee80211_mutable_offsets *offs) | |
2901 | { | |
2902 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
2903 | } | |
2904 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
2905 | ||
2906 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
2907 | struct ieee80211_vif *vif, | |
2908 | u16 *tim_offset, u16 *tim_length) | |
2909 | { | |
2910 | struct ieee80211_mutable_offsets offs = {}; | |
2911 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
2912 | ||
2913 | if (tim_offset) | |
2914 | *tim_offset = offs.tim_offset; | |
2915 | ||
2916 | if (tim_length) | |
2917 | *tim_length = offs.tim_length; | |
2918 | ||
2919 | return bcn; | |
e2ebc74d | 2920 | } |
eddcbb94 | 2921 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2922 | |
02945821 AN |
2923 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2924 | struct ieee80211_vif *vif) | |
2925 | { | |
2926 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2927 | struct sk_buff *skb = NULL; |
2928 | struct probe_resp *presp = NULL; | |
02945821 AN |
2929 | struct ieee80211_hdr *hdr; |
2930 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2931 | ||
2932 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2933 | return NULL; | |
2934 | ||
2935 | rcu_read_lock(); | |
2936 | ||
2937 | ap = &sdata->u.ap; | |
2938 | presp = rcu_dereference(ap->probe_resp); | |
2939 | if (!presp) | |
2940 | goto out; | |
2941 | ||
aa7a0080 | 2942 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2943 | if (!skb) |
2944 | goto out; | |
2945 | ||
aa7a0080 ES |
2946 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2947 | ||
02945821 AN |
2948 | hdr = (struct ieee80211_hdr *) skb->data; |
2949 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2950 | ||
2951 | out: | |
2952 | rcu_read_unlock(); | |
2953 | return skb; | |
2954 | } | |
2955 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2956 | ||
7044cc56 KV |
2957 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2958 | struct ieee80211_vif *vif) | |
2959 | { | |
2960 | struct ieee80211_sub_if_data *sdata; | |
2961 | struct ieee80211_if_managed *ifmgd; | |
2962 | struct ieee80211_pspoll *pspoll; | |
2963 | struct ieee80211_local *local; | |
2964 | struct sk_buff *skb; | |
2965 | ||
2966 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2967 | return NULL; | |
2968 | ||
2969 | sdata = vif_to_sdata(vif); | |
2970 | ifmgd = &sdata->u.mgd; | |
2971 | local = sdata->local; | |
2972 | ||
2973 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2974 | if (!skb) |
7044cc56 | 2975 | return NULL; |
d15b8459 | 2976 | |
7044cc56 KV |
2977 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2978 | ||
2979 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2980 | memset(pspoll, 0, sizeof(*pspoll)); | |
2981 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2982 | IEEE80211_STYPE_PSPOLL); | |
2983 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2984 | ||
2985 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2986 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2987 | ||
2988 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2989 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2990 | ||
2991 | return skb; | |
2992 | } | |
2993 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2994 | ||
2995 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2996 | struct ieee80211_vif *vif) | |
2997 | { | |
2998 | struct ieee80211_hdr_3addr *nullfunc; | |
2999 | struct ieee80211_sub_if_data *sdata; | |
3000 | struct ieee80211_if_managed *ifmgd; | |
3001 | struct ieee80211_local *local; | |
3002 | struct sk_buff *skb; | |
3003 | ||
3004 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
3005 | return NULL; | |
3006 | ||
3007 | sdata = vif_to_sdata(vif); | |
3008 | ifmgd = &sdata->u.mgd; | |
3009 | local = sdata->local; | |
3010 | ||
3011 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 3012 | if (!skb) |
7044cc56 | 3013 | return NULL; |
d15b8459 | 3014 | |
7044cc56 KV |
3015 | skb_reserve(skb, local->hw.extra_tx_headroom); |
3016 | ||
3017 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
3018 | sizeof(*nullfunc)); | |
3019 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
3020 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
3021 | IEEE80211_STYPE_NULLFUNC | | |
3022 | IEEE80211_FCTL_TODS); | |
3023 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
3024 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
3025 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
3026 | ||
3027 | return skb; | |
3028 | } | |
3029 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
3030 | ||
05e54ea6 | 3031 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 3032 | const u8 *src_addr, |
05e54ea6 | 3033 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 3034 | size_t tailroom) |
05e54ea6 | 3035 | { |
a344d677 | 3036 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
3037 | struct ieee80211_hdr_3addr *hdr; |
3038 | struct sk_buff *skb; | |
3039 | size_t ie_ssid_len; | |
3040 | u8 *pos; | |
3041 | ||
05e54ea6 KV |
3042 | ie_ssid_len = 2 + ssid_len; |
3043 | ||
3044 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 3045 | ie_ssid_len + tailroom); |
d15b8459 | 3046 | if (!skb) |
05e54ea6 | 3047 | return NULL; |
05e54ea6 KV |
3048 | |
3049 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3050 | ||
3051 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
3052 | memset(hdr, 0, sizeof(*hdr)); | |
3053 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
3054 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 3055 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 3056 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 3057 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
3058 | |
3059 | pos = skb_put(skb, ie_ssid_len); | |
3060 | *pos++ = WLAN_EID_SSID; | |
3061 | *pos++ = ssid_len; | |
88c868c4 | 3062 | if (ssid_len) |
05e54ea6 KV |
3063 | memcpy(pos, ssid, ssid_len); |
3064 | pos += ssid_len; | |
3065 | ||
05e54ea6 KV |
3066 | return skb; |
3067 | } | |
3068 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
3069 | ||
32bfd35d | 3070 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3071 | const void *frame, size_t frame_len, |
e039fa4a | 3072 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3073 | struct ieee80211_rts *rts) |
3074 | { | |
3075 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3076 | |
065e9605 HH |
3077 | rts->frame_control = |
3078 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
3079 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
3080 | frame_txctl); | |
e2ebc74d JB |
3081 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
3082 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
3083 | } | |
3084 | EXPORT_SYMBOL(ieee80211_rts_get); | |
3085 | ||
32bfd35d | 3086 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3087 | const void *frame, size_t frame_len, |
e039fa4a | 3088 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3089 | struct ieee80211_cts *cts) |
3090 | { | |
3091 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3092 | |
065e9605 HH |
3093 | cts->frame_control = |
3094 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
3095 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
3096 | frame_len, frame_txctl); | |
e2ebc74d JB |
3097 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
3098 | } | |
3099 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
3100 | ||
3101 | struct sk_buff * | |
32bfd35d | 3102 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 3103 | struct ieee80211_vif *vif) |
e2ebc74d JB |
3104 | { |
3105 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 3106 | struct sk_buff *skb = NULL; |
5cf121c3 | 3107 | struct ieee80211_tx_data tx; |
e2ebc74d | 3108 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 3109 | struct ps_data *ps; |
e039fa4a | 3110 | struct ieee80211_tx_info *info; |
55de908a | 3111 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 3112 | |
32bfd35d | 3113 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 3114 | |
5dfdaf58 | 3115 | rcu_read_lock(); |
55de908a | 3116 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 3117 | |
d012a605 MP |
3118 | if (!chanctx_conf) |
3119 | goto out; | |
3120 | ||
3121 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
3122 | struct beacon_data *beacon = | |
3123 | rcu_dereference(sdata->u.ap.beacon); | |
3124 | ||
3125 | if (!beacon || !beacon->head) | |
3126 | goto out; | |
3127 | ||
3128 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
3129 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
3130 | ps = &sdata->u.mesh.ps; | |
d012a605 | 3131 | } else { |
747cf5e9 | 3132 | goto out; |
d012a605 | 3133 | } |
5dfdaf58 | 3134 | |
d012a605 | 3135 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 3136 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 3137 | |
e2ebc74d | 3138 | while (1) { |
d012a605 | 3139 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 3140 | if (!skb) |
747cf5e9 | 3141 | goto out; |
e2ebc74d JB |
3142 | local->total_ps_buffered--; |
3143 | ||
d012a605 | 3144 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
3145 | struct ieee80211_hdr *hdr = |
3146 | (struct ieee80211_hdr *) skb->data; | |
3147 | /* more buffered multicast/broadcast frames ==> set | |
3148 | * MoreData flag in IEEE 802.11 header to inform PS | |
3149 | * STAs */ | |
3150 | hdr->frame_control |= | |
3151 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3152 | } | |
3153 | ||
112c44b2 | 3154 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 3155 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 3156 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d JB |
3157 | break; |
3158 | dev_kfree_skb_any(skb); | |
3159 | } | |
e039fa4a JB |
3160 | |
3161 | info = IEEE80211_SKB_CB(skb); | |
3162 | ||
5cf121c3 | 3163 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 3164 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 3165 | |
97b045d6 | 3166 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 3167 | skb = NULL; |
97b045d6 | 3168 | out: |
d0709a65 | 3169 | rcu_read_unlock(); |
e2ebc74d JB |
3170 | |
3171 | return skb; | |
3172 | } | |
3173 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 3174 | |
b6da911b LK |
3175 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
3176 | { | |
3177 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3178 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3179 | struct ieee80211_local *local = sdata->local; | |
3180 | int ret; | |
3181 | u32 queues; | |
3182 | ||
3183 | lockdep_assert_held(&local->sta_mtx); | |
3184 | ||
3185 | /* only some cases are supported right now */ | |
3186 | switch (sdata->vif.type) { | |
3187 | case NL80211_IFTYPE_STATION: | |
3188 | case NL80211_IFTYPE_AP: | |
3189 | case NL80211_IFTYPE_AP_VLAN: | |
3190 | break; | |
3191 | default: | |
3192 | WARN_ON(1); | |
3193 | return -EINVAL; | |
3194 | } | |
3195 | ||
3196 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
3197 | return -EINVAL; | |
3198 | ||
3199 | if (sta->reserved_tid == tid) { | |
3200 | ret = 0; | |
3201 | goto out; | |
3202 | } | |
3203 | ||
3204 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
3205 | sdata_err(sdata, "TID reservation already active\n"); | |
3206 | ret = -EALREADY; | |
3207 | goto out; | |
3208 | } | |
3209 | ||
3210 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
3211 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3212 | ||
3213 | synchronize_net(); | |
3214 | ||
3215 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
3216 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) { | |
3217 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3218 | __ieee80211_stop_tx_ba_session(sta, tid, | |
3219 | AGG_STOP_LOCAL_REQUEST); | |
3220 | } | |
3221 | ||
3222 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 3223 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
3224 | |
3225 | sta->reserved_tid = tid; | |
3226 | ||
3227 | ieee80211_wake_vif_queues(local, sdata, | |
3228 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3229 | ||
3230 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) | |
3231 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3232 | ||
3233 | ret = 0; | |
3234 | out: | |
3235 | return ret; | |
3236 | } | |
3237 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
3238 | ||
3239 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
3240 | { | |
3241 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3242 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3243 | ||
3244 | lockdep_assert_held(&sdata->local->sta_mtx); | |
3245 | ||
3246 | /* only some cases are supported right now */ | |
3247 | switch (sdata->vif.type) { | |
3248 | case NL80211_IFTYPE_STATION: | |
3249 | case NL80211_IFTYPE_AP: | |
3250 | case NL80211_IFTYPE_AP_VLAN: | |
3251 | break; | |
3252 | default: | |
3253 | WARN_ON(1); | |
3254 | return; | |
3255 | } | |
3256 | ||
3257 | if (tid != sta->reserved_tid) { | |
3258 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
3259 | return; | |
3260 | } | |
3261 | ||
3262 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
3263 | } | |
3264 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
3265 | ||
55de908a JB |
3266 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
3267 | struct sk_buff *skb, int tid, | |
3268 | enum ieee80211_band band) | |
3b8d81e0 | 3269 | { |
353d09c6 | 3270 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 3271 | |
3b8d81e0 JB |
3272 | skb_set_mac_header(skb, 0); |
3273 | skb_set_network_header(skb, 0); | |
3274 | skb_set_transport_header(skb, 0); | |
3275 | ||
3a25a8c8 | 3276 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 3277 | skb->priority = tid; |
cf0277e7 | 3278 | |
89afe614 JB |
3279 | skb->dev = sdata->dev; |
3280 | ||
3d34deb6 JB |
3281 | /* |
3282 | * The other path calling ieee80211_xmit is from the tasklet, | |
3283 | * and while we can handle concurrent transmissions locking | |
3284 | * requirements are that we do not come into tx with bhs on. | |
3285 | */ | |
3286 | local_bh_disable(); | |
73c4e195 | 3287 | IEEE80211_SKB_CB(skb)->band = band; |
7c10770f | 3288 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 3289 | local_bh_enable(); |
3b8d81e0 | 3290 | } |