Commit | Line | Data |
---|---|---|
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 | ||
ba8c3d6f FF |
770 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
771 | { | |
772 | u16 *seq = &sta->tid_seq[tid]; | |
773 | __le16 ret = cpu_to_le16(*seq); | |
774 | ||
775 | /* Increase the sequence number. */ | |
776 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
777 | ||
778 | return ret; | |
779 | } | |
780 | ||
f591fa5d JB |
781 | static ieee80211_tx_result debug_noinline |
782 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
783 | { | |
784 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
785 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
f591fa5d JB |
786 | u8 *qc; |
787 | int tid; | |
788 | ||
25d834e1 JB |
789 | /* |
790 | * Packet injection may want to control the sequence | |
791 | * number, if we have no matching interface then we | |
792 | * neither assign one ourselves nor ask the driver to. | |
793 | */ | |
5061b0c2 | 794 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
795 | return TX_CONTINUE; |
796 | ||
f591fa5d JB |
797 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
798 | return TX_CONTINUE; | |
799 | ||
800 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
801 | return TX_CONTINUE; | |
802 | ||
49a59543 JB |
803 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
804 | return TX_CONTINUE; | |
805 | ||
94778280 JB |
806 | /* |
807 | * Anything but QoS data that has a sequence number field | |
808 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
809 | * counter. QoS data frames with a multicast destination |
810 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 811 | */ |
c4c205f3 BC |
812 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
813 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 814 | /* driver should assign sequence number */ |
f591fa5d | 815 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
816 | /* for pure STA mode without beacons, we can do it */ |
817 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
818 | tx->sdata->sequence_number += 0x10; | |
79c892b8 JB |
819 | if (tx->sta) |
820 | tx->sta->tx_msdu[IEEE80211_NUM_TIDS]++; | |
f591fa5d JB |
821 | return TX_CONTINUE; |
822 | } | |
823 | ||
824 | /* | |
825 | * This should be true for injected/management frames only, for | |
826 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
827 | * above since they are not QoS-data frames. | |
828 | */ | |
829 | if (!tx->sta) | |
830 | return TX_CONTINUE; | |
831 | ||
832 | /* include per-STA, per-TID sequence counter */ | |
833 | ||
834 | qc = ieee80211_get_qos_ctl(hdr); | |
835 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
79c892b8 | 836 | tx->sta->tx_msdu[tid]++; |
f591fa5d | 837 | |
ba8c3d6f FF |
838 | if (!tx->sta->sta.txq[0]) |
839 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); | |
f591fa5d JB |
840 | |
841 | return TX_CONTINUE; | |
842 | } | |
843 | ||
252b86c4 | 844 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
845 | struct sk_buff *skb, int hdrlen, |
846 | int frag_threshold) | |
847 | { | |
252b86c4 | 848 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 849 | struct ieee80211_tx_info *info; |
252b86c4 | 850 | struct sk_buff *tmp; |
2de8e0d9 JB |
851 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
852 | int pos = hdrlen + per_fragm; | |
853 | int rem = skb->len - hdrlen - per_fragm; | |
854 | ||
855 | if (WARN_ON(rem < 0)) | |
856 | return -EINVAL; | |
857 | ||
252b86c4 JB |
858 | /* first fragment was already added to queue by caller */ |
859 | ||
2de8e0d9 JB |
860 | while (rem) { |
861 | int fraglen = per_fragm; | |
862 | ||
863 | if (fraglen > rem) | |
864 | fraglen = rem; | |
865 | rem -= fraglen; | |
866 | tmp = dev_alloc_skb(local->tx_headroom + | |
867 | frag_threshold + | |
2475b1cc | 868 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
869 | IEEE80211_ENCRYPT_TAILROOM); |
870 | if (!tmp) | |
871 | return -ENOMEM; | |
252b86c4 JB |
872 | |
873 | __skb_queue_tail(&tx->skbs, tmp); | |
874 | ||
2475b1cc MS |
875 | skb_reserve(tmp, |
876 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
877 | ||
2de8e0d9 JB |
878 | /* copy control information */ |
879 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
880 | |
881 | info = IEEE80211_SKB_CB(tmp); | |
882 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
883 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
884 | ||
885 | if (rem) | |
886 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
887 | ||
2de8e0d9 JB |
888 | skb_copy_queue_mapping(tmp, skb); |
889 | tmp->priority = skb->priority; | |
2de8e0d9 | 890 | tmp->dev = skb->dev; |
2de8e0d9 JB |
891 | |
892 | /* copy header and data */ | |
893 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
894 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
895 | ||
896 | pos += fraglen; | |
897 | } | |
898 | ||
252b86c4 | 899 | /* adjust first fragment's length */ |
338f977f | 900 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
901 | return 0; |
902 | } | |
903 | ||
d9e8a70f | 904 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
905 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
906 | { | |
2de8e0d9 JB |
907 | struct sk_buff *skb = tx->skb; |
908 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
909 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 910 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
911 | int hdrlen; |
912 | int fragnum; | |
e2454948 | 913 | |
252b86c4 JB |
914 | /* no matter what happens, tx->skb moves to tx->skbs */ |
915 | __skb_queue_tail(&tx->skbs, skb); | |
916 | tx->skb = NULL; | |
917 | ||
a26eb27a JB |
918 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
919 | return TX_CONTINUE; | |
920 | ||
921 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
922 | return TX_CONTINUE; |
923 | ||
eefce91a JB |
924 | /* |
925 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 926 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 927 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 928 | */ |
8b30b1fe | 929 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
930 | return TX_DROP; |
931 | ||
065e9605 | 932 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 933 | |
a26eb27a | 934 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 935 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 936 | return TX_DROP; |
e6a9854b | 937 | |
2de8e0d9 JB |
938 | /* |
939 | * Now fragment the frame. This will allocate all the fragments and | |
940 | * chain them (using skb as the first fragment) to skb->next. | |
941 | * During transmission, we will remove the successfully transmitted | |
942 | * fragments from this list. When the low-level driver rejects one | |
943 | * of the fragments then we will simply pretend to accept the skb | |
944 | * but store it away as pending. | |
945 | */ | |
252b86c4 | 946 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 947 | return TX_DROP; |
e6a9854b | 948 | |
2de8e0d9 JB |
949 | /* update duration/seq/flags of fragments */ |
950 | fragnum = 0; | |
252b86c4 JB |
951 | |
952 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 953 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 954 | |
2de8e0d9 JB |
955 | hdr = (void *)skb->data; |
956 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 957 | |
252b86c4 | 958 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 959 | hdr->frame_control |= morefrags; |
e6a9854b JB |
960 | /* |
961 | * No multi-rate retries for fragmented frames, that | |
962 | * would completely throw off the NAV at other STAs. | |
963 | */ | |
964 | info->control.rates[1].idx = -1; | |
965 | info->control.rates[2].idx = -1; | |
966 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 967 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 968 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
969 | } else { |
970 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 971 | } |
2de8e0d9 JB |
972 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
973 | fragnum++; | |
252b86c4 | 974 | } |
e2ebc74d | 975 | |
9ae54c84 | 976 | return TX_CONTINUE; |
e2ebc74d JB |
977 | } |
978 | ||
feff1f2f JB |
979 | static ieee80211_tx_result debug_noinline |
980 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
981 | { | |
252b86c4 | 982 | struct sk_buff *skb; |
560d2682 | 983 | int ac = -1; |
feff1f2f JB |
984 | |
985 | if (!tx->sta) | |
986 | return TX_CONTINUE; | |
987 | ||
252b86c4 | 988 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 989 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 990 | tx->sta->tx_fragments++; |
560d2682 | 991 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 992 | } |
560d2682 JB |
993 | if (ac >= 0) |
994 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
995 | |
996 | return TX_CONTINUE; | |
997 | } | |
998 | ||
d9e8a70f | 999 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1000 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1001 | { | |
1002 | if (!tx->key) | |
1003 | return TX_CONTINUE; | |
1004 | ||
97359d12 JB |
1005 | switch (tx->key->conf.cipher) { |
1006 | case WLAN_CIPHER_SUITE_WEP40: | |
1007 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1008 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1009 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1010 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1011 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1012 | return ieee80211_crypto_ccmp_encrypt( |
1013 | tx, IEEE80211_CCMP_MIC_LEN); | |
1014 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1015 | return ieee80211_crypto_ccmp_encrypt( | |
1016 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1017 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1018 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1019 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1020 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1021 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1022 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1023 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1024 | case WLAN_CIPHER_SUITE_GCMP: |
1025 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1026 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1027 | default: |
d32a1028 | 1028 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1029 | } |
1030 | ||
e2454948 JB |
1031 | return TX_DROP; |
1032 | } | |
1033 | ||
d9e8a70f | 1034 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1035 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1036 | { | |
252b86c4 | 1037 | struct sk_buff *skb; |
2de8e0d9 JB |
1038 | struct ieee80211_hdr *hdr; |
1039 | int next_len; | |
1040 | bool group_addr; | |
03f93c3d | 1041 | |
252b86c4 | 1042 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1043 | hdr = (void *) skb->data; |
7e0aae47 JM |
1044 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1045 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1046 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1047 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1048 | next_len = next->len; | |
1049 | } else | |
1050 | next_len = 0; | |
2de8e0d9 | 1051 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1052 | |
2de8e0d9 | 1053 | hdr->duration_id = |
252b86c4 JB |
1054 | ieee80211_duration(tx, skb, group_addr, next_len); |
1055 | } | |
03f93c3d JB |
1056 | |
1057 | return TX_CONTINUE; | |
1058 | } | |
1059 | ||
e2ebc74d JB |
1060 | /* actual transmit path */ |
1061 | ||
a622ab72 JB |
1062 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1063 | struct sk_buff *skb, | |
1064 | struct ieee80211_tx_info *info, | |
1065 | struct tid_ampdu_tx *tid_tx, | |
1066 | int tid) | |
1067 | { | |
1068 | bool queued = false; | |
285fa695 | 1069 | bool reset_agg_timer = false; |
aa454580 | 1070 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1071 | |
1072 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1073 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1074 | reset_agg_timer = true; |
0ab33703 JB |
1075 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1076 | /* | |
1077 | * nothing -- this aggregation session is being started | |
1078 | * but that might still fail with the driver | |
1079 | */ | |
ba8c3d6f | 1080 | } else if (!tx->sta->sta.txq[tid]) { |
a622ab72 JB |
1081 | spin_lock(&tx->sta->lock); |
1082 | /* | |
1083 | * Need to re-check now, because we may get here | |
1084 | * | |
1085 | * 1) in the window during which the setup is actually | |
1086 | * already done, but not marked yet because not all | |
1087 | * packets are spliced over to the driver pending | |
1088 | * queue yet -- if this happened we acquire the lock | |
1089 | * either before or after the splice happens, but | |
1090 | * need to recheck which of these cases happened. | |
1091 | * | |
1092 | * 2) during session teardown, if the OPERATIONAL bit | |
1093 | * was cleared due to the teardown but the pointer | |
1094 | * hasn't been assigned NULL yet (or we loaded it | |
1095 | * before it was assigned) -- in this case it may | |
1096 | * now be NULL which means we should just let the | |
1097 | * packet pass through because splicing the frames | |
1098 | * back is already done. | |
1099 | */ | |
40b275b6 | 1100 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1101 | |
1102 | if (!tid_tx) { | |
1103 | /* do nothing, let packet pass through */ | |
1104 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1105 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1106 | reset_agg_timer = true; |
a622ab72 JB |
1107 | } else { |
1108 | queued = true; | |
1109 | info->control.vif = &tx->sdata->vif; | |
1110 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
03c8c06f | 1111 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1112 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1113 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1114 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1115 | } |
1116 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1117 | |
1118 | if (purge_skb) | |
c3e7724b | 1119 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1120 | } |
1121 | ||
285fa695 NM |
1122 | /* reset session timer */ |
1123 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1124 | tid_tx->last_tx = jiffies; |
285fa695 | 1125 | |
a622ab72 JB |
1126 | return queued; |
1127 | } | |
1128 | ||
58d4185e JB |
1129 | /* |
1130 | * initialises @tx | |
7c10770f JB |
1131 | * pass %NULL for the station if unknown, a valid pointer if known |
1132 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1133 | */ |
9ae54c84 | 1134 | static ieee80211_tx_result |
3b8d81e0 JB |
1135 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1136 | struct ieee80211_tx_data *tx, | |
7c10770f | 1137 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1138 | { |
3b8d81e0 | 1139 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1140 | struct ieee80211_hdr *hdr; |
e039fa4a | 1141 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1142 | int tid; |
a622ab72 | 1143 | u8 *qc; |
e2ebc74d JB |
1144 | |
1145 | memset(tx, 0, sizeof(*tx)); | |
1146 | tx->skb = skb; | |
e2ebc74d | 1147 | tx->local = local; |
3b8d81e0 | 1148 | tx->sdata = sdata; |
252b86c4 | 1149 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1150 | |
cd8ffc80 JB |
1151 | /* |
1152 | * If this flag is set to true anywhere, and we get here, | |
1153 | * we are doing the needed processing, so remove the flag | |
1154 | * now. | |
1155 | */ | |
1156 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1157 | ||
58d4185e JB |
1158 | hdr = (struct ieee80211_hdr *) skb->data; |
1159 | ||
7c10770f JB |
1160 | if (likely(sta)) { |
1161 | if (!IS_ERR(sta)) | |
1162 | tx->sta = sta; | |
1163 | } else { | |
1164 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1165 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1166 | if (!tx->sta && sdata->wdev.use_4addr) | |
1167 | return TX_DROP; | |
1168 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1169 | IEEE80211_TX_CTL_INJECTED) || | |
1170 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1171 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1172 | } | |
1173 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1174 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1175 | } |
58d4185e | 1176 | |
cd8ffc80 | 1177 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1178 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1179 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1180 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1181 | struct tid_ampdu_tx *tid_tx; |
1182 | ||
8b30b1fe S |
1183 | qc = ieee80211_get_qos_ctl(hdr); |
1184 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1185 | ||
a622ab72 JB |
1186 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1187 | if (tid_tx) { | |
1188 | bool queued; | |
cd8ffc80 | 1189 | |
a622ab72 JB |
1190 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1191 | tid_tx, tid); | |
1192 | ||
1193 | if (unlikely(queued)) | |
1194 | return TX_QUEUED; | |
1195 | } | |
8b30b1fe S |
1196 | } |
1197 | ||
badffb72 | 1198 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1199 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1200 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1201 | } else |
5cf121c3 | 1202 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1203 | |
a26eb27a JB |
1204 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1205 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1206 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1207 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1208 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1209 | } |
1210 | ||
e2ebc74d | 1211 | if (!tx->sta) |
e039fa4a | 1212 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1213 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1214 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1215 | |
e039fa4a | 1216 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1217 | |
9ae54c84 | 1218 | return TX_CONTINUE; |
e2ebc74d JB |
1219 | } |
1220 | ||
ba8c3d6f FF |
1221 | static void ieee80211_drv_tx(struct ieee80211_local *local, |
1222 | struct ieee80211_vif *vif, | |
1223 | struct ieee80211_sta *pubsta, | |
1224 | struct sk_buff *skb) | |
1225 | { | |
1226 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1227 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1228 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1229 | struct ieee80211_tx_control control = { | |
1230 | .sta = pubsta, | |
1231 | }; | |
1232 | struct ieee80211_txq *txq = NULL; | |
1233 | struct txq_info *txqi; | |
1234 | u8 ac; | |
1235 | ||
1236 | if (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE) | |
1237 | goto tx_normal; | |
1238 | ||
1239 | if (!ieee80211_is_data(hdr->frame_control)) | |
1240 | goto tx_normal; | |
1241 | ||
1242 | if (pubsta) { | |
1243 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; | |
1244 | ||
1245 | txq = pubsta->txq[tid]; | |
1246 | } else if (vif) { | |
1247 | txq = vif->txq; | |
1248 | } | |
1249 | ||
1250 | if (!txq) | |
1251 | goto tx_normal; | |
1252 | ||
1253 | ac = txq->ac; | |
1254 | txqi = to_txq_info(txq); | |
1255 | atomic_inc(&sdata->txqs_len[ac]); | |
1256 | if (atomic_read(&sdata->txqs_len[ac]) >= local->hw.txq_ac_max_pending) | |
1257 | netif_stop_subqueue(sdata->dev, ac); | |
1258 | ||
1259 | skb_queue_tail(&txqi->queue, skb); | |
1260 | drv_wake_tx_queue(local, txqi); | |
1261 | ||
1262 | return; | |
1263 | ||
1264 | tx_normal: | |
1265 | drv_tx(local, &control, skb); | |
1266 | } | |
1267 | ||
1268 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, | |
1269 | struct ieee80211_txq *txq) | |
1270 | { | |
1271 | struct ieee80211_local *local = hw_to_local(hw); | |
1272 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif); | |
1273 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); | |
1274 | struct ieee80211_hdr *hdr; | |
1275 | struct sk_buff *skb = NULL; | |
1276 | u8 ac = txq->ac; | |
1277 | ||
1278 | spin_lock_bh(&txqi->queue.lock); | |
1279 | ||
1280 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags)) | |
1281 | goto out; | |
1282 | ||
1283 | skb = __skb_dequeue(&txqi->queue); | |
1284 | if (!skb) | |
1285 | goto out; | |
1286 | ||
1287 | atomic_dec(&sdata->txqs_len[ac]); | |
1288 | if (__netif_subqueue_stopped(sdata->dev, ac)) | |
1289 | ieee80211_propagate_queue_wake(local, sdata->vif.hw_queue[ac]); | |
1290 | ||
1291 | hdr = (struct ieee80211_hdr *)skb->data; | |
1292 | if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) { | |
1293 | struct sta_info *sta = container_of(txq->sta, struct sta_info, | |
1294 | sta); | |
1295 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1296 | ||
1297 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, txq->tid); | |
1298 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) | |
1299 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
1300 | else | |
1301 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
1302 | } | |
1303 | ||
1304 | out: | |
1305 | spin_unlock_bh(&txqi->queue.lock); | |
1306 | ||
1307 | return skb; | |
1308 | } | |
1309 | EXPORT_SYMBOL(ieee80211_tx_dequeue); | |
1310 | ||
11127e91 JB |
1311 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1312 | struct ieee80211_vif *vif, | |
1313 | struct ieee80211_sta *sta, | |
1314 | struct sk_buff_head *skbs, | |
1315 | bool txpending) | |
e2ebc74d | 1316 | { |
252b86c4 | 1317 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1318 | unsigned long flags; |
e2ebc74d | 1319 | |
252b86c4 | 1320 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1321 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1322 | int q = info->hw_queue; | |
1323 | ||
1324 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1325 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1326 | __skb_unlink(skb, skbs); | |
c3e7724b | 1327 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1328 | continue; |
1329 | } | |
1330 | #endif | |
3b8d81e0 JB |
1331 | |
1332 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1333 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1334 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1335 | if (unlikely(info->flags & |
a7679ed5 SF |
1336 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1337 | if (local->queue_stop_reasons[q] & | |
1338 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1339 | /* | |
1340 | * Drop off-channel frames if queues | |
1341 | * are stopped for any reason other | |
1342 | * than off-channel operation. Never | |
1343 | * queue them. | |
1344 | */ | |
1345 | spin_unlock_irqrestore( | |
1346 | &local->queue_stop_reason_lock, | |
1347 | flags); | |
1348 | ieee80211_purge_tx_queue(&local->hw, | |
1349 | skbs); | |
1350 | return true; | |
1351 | } | |
1352 | } else { | |
1353 | ||
6c17b77b | 1354 | /* |
a7679ed5 SF |
1355 | * Since queue is stopped, queue up frames for |
1356 | * later transmission from the tx-pending | |
1357 | * tasklet when the queue is woken again. | |
6c17b77b | 1358 | */ |
a7679ed5 SF |
1359 | if (txpending) |
1360 | skb_queue_splice_init(skbs, | |
1361 | &local->pending[q]); | |
1362 | else | |
1363 | skb_queue_splice_tail_init(skbs, | |
1364 | &local->pending[q]); | |
1365 | ||
1366 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1367 | flags); | |
1368 | return false; | |
6c17b77b | 1369 | } |
7bb45683 | 1370 | } |
3b8d81e0 | 1371 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1372 | |
11127e91 | 1373 | info->control.vif = vif; |
f0e72851 | 1374 | |
11127e91 | 1375 | __skb_unlink(skb, skbs); |
ba8c3d6f | 1376 | ieee80211_drv_tx(local, vif, sta, skb); |
11127e91 | 1377 | } |
5061b0c2 | 1378 | |
11127e91 JB |
1379 | return true; |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1384 | */ | |
1385 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1386 | struct sk_buff_head *skbs, int led_len, | |
1387 | struct sta_info *sta, bool txpending) | |
1388 | { | |
1389 | struct ieee80211_tx_info *info; | |
1390 | struct ieee80211_sub_if_data *sdata; | |
1391 | struct ieee80211_vif *vif; | |
1392 | struct ieee80211_sta *pubsta; | |
1393 | struct sk_buff *skb; | |
1394 | bool result = true; | |
1395 | __le16 fc; | |
5061b0c2 | 1396 | |
11127e91 JB |
1397 | if (WARN_ON(skb_queue_empty(skbs))) |
1398 | return true; | |
ec25acc4 | 1399 | |
11127e91 JB |
1400 | skb = skb_peek(skbs); |
1401 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1402 | info = IEEE80211_SKB_CB(skb); | |
1403 | sdata = vif_to_sdata(info->control.vif); | |
1404 | if (sta && !sta->uploaded) | |
1405 | sta = NULL; | |
1406 | ||
1407 | if (sta) | |
1408 | pubsta = &sta->sta; | |
1409 | else | |
1410 | pubsta = NULL; | |
1411 | ||
1412 | switch (sdata->vif.type) { | |
1413 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1414 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1415 | vif = &sdata->vif; | |
1416 | break; | |
1417 | } | |
4b6f1dd6 | 1418 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1419 | if (sdata) { |
4b6f1dd6 | 1420 | vif = &sdata->vif; |
3a25a8c8 JB |
1421 | info->hw_queue = |
1422 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1423 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1424 | dev_kfree_skb(skb); | |
1425 | return true; | |
1426 | } else | |
4b6f1dd6 | 1427 | vif = NULL; |
11127e91 JB |
1428 | break; |
1429 | case NL80211_IFTYPE_AP_VLAN: | |
1430 | sdata = container_of(sdata->bss, | |
1431 | struct ieee80211_sub_if_data, u.ap); | |
1432 | /* fall through */ | |
1433 | default: | |
1434 | vif = &sdata->vif; | |
1435 | break; | |
e2ebc74d | 1436 | } |
2de8e0d9 | 1437 | |
cb831b53 JB |
1438 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1439 | txpending); | |
11127e91 | 1440 | |
74e4dbfd | 1441 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1442 | |
4db4e0a1 | 1443 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1444 | |
11127e91 | 1445 | return result; |
e2ebc74d JB |
1446 | } |
1447 | ||
97b045d6 JB |
1448 | /* |
1449 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1450 | * frame was dropped or queued. | |
1451 | */ | |
1452 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1453 | { | |
252b86c4 | 1454 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1455 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1456 | |
9aa4aee3 JB |
1457 | #define CALL_TXH(txh) \ |
1458 | do { \ | |
1459 | res = txh(tx); \ | |
1460 | if (res != TX_CONTINUE) \ | |
1461 | goto txh_done; \ | |
1462 | } while (0) | |
1463 | ||
5c1b98a5 | 1464 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1465 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1466 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1467 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1468 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1469 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1470 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1471 | |
aa5b5492 JB |
1472 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1473 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1474 | tx->skb = NULL; | |
c6fcf6bc | 1475 | goto txh_done; |
aa5b5492 | 1476 | } |
c6fcf6bc JB |
1477 | |
1478 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1479 | CALL_TXH(ieee80211_tx_h_sequence); |
1480 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1481 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1482 | CALL_TXH(ieee80211_tx_h_stats); |
1483 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1484 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1485 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1486 | #undef CALL_TXH |
97b045d6 | 1487 | |
d9e8a70f | 1488 | txh_done: |
97b045d6 | 1489 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1490 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1491 | if (tx->skb) |
c3e7724b | 1492 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1493 | else |
1f98ab7f | 1494 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1495 | return -1; |
1496 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1497 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1498 | return -1; |
1499 | } | |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
06be6b14 FF |
1504 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1505 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1506 | int band, struct ieee80211_sta **sta) | |
1507 | { | |
1508 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1509 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1510 | struct ieee80211_tx_data tx; | |
88724a81 | 1511 | struct sk_buff *skb2; |
06be6b14 | 1512 | |
7c10770f | 1513 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1514 | return false; |
1515 | ||
1516 | info->band = band; | |
1517 | info->control.vif = vif; | |
1518 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1519 | ||
1520 | if (invoke_tx_handlers(&tx)) | |
1521 | return false; | |
1522 | ||
1523 | if (sta) { | |
1524 | if (tx.sta) | |
1525 | *sta = &tx.sta->sta; | |
1526 | else | |
1527 | *sta = NULL; | |
1528 | } | |
1529 | ||
88724a81 JB |
1530 | /* this function isn't suitable for fragmented data frames */ |
1531 | skb2 = __skb_dequeue(&tx.skbs); | |
1532 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1533 | ieee80211_free_txskb(hw, skb2); | |
1534 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1535 | return false; | |
1536 | } | |
1537 | ||
06be6b14 FF |
1538 | return true; |
1539 | } | |
1540 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1541 | ||
7bb45683 JB |
1542 | /* |
1543 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1544 | */ | |
1545 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f JB |
1546 | struct sta_info *sta, struct sk_buff *skb, |
1547 | bool txpending) | |
e2ebc74d | 1548 | { |
3b8d81e0 | 1549 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1550 | struct ieee80211_tx_data tx; |
97b045d6 | 1551 | ieee80211_tx_result res_prepare; |
e039fa4a | 1552 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1553 | bool result = true; |
74e4dbfd | 1554 | int led_len; |
e2ebc74d | 1555 | |
e2ebc74d JB |
1556 | if (unlikely(skb->len < 10)) { |
1557 | dev_kfree_skb(skb); | |
7bb45683 | 1558 | return true; |
e2ebc74d JB |
1559 | } |
1560 | ||
58d4185e | 1561 | /* initialises tx */ |
74e4dbfd | 1562 | led_len = skb->len; |
7c10770f | 1563 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1564 | |
cd8ffc80 | 1565 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1566 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1567 | return true; |
cd8ffc80 | 1568 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1569 | return true; |
e2ebc74d JB |
1570 | } |
1571 | ||
3a25a8c8 JB |
1572 | /* set up hw_queue value early */ |
1573 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1574 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1575 | info->hw_queue = | |
1576 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1577 | ||
7bb45683 | 1578 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1579 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1580 | tx.sta, txpending); | |
55de908a | 1581 | |
7bb45683 | 1582 | return result; |
e2ebc74d JB |
1583 | } |
1584 | ||
1585 | /* device xmit handlers */ | |
1586 | ||
3bff1865 | 1587 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1588 | struct sk_buff *skb, |
1589 | int head_need, bool may_encrypt) | |
1590 | { | |
3bff1865 | 1591 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1592 | int tail_need = 0; |
1593 | ||
3bff1865 | 1594 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1595 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1596 | tail_need -= skb_tailroom(skb); | |
1597 | tail_need = max_t(int, tail_need, 0); | |
1598 | } | |
1599 | ||
c70f59a2 IY |
1600 | if (skb_cloned(skb) && |
1601 | (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CLONED_SKBS) || | |
1602 | !skb_clone_writable(skb, ETH_HLEN) || | |
17c18bf8 | 1603 | (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt))) |
23c0752a | 1604 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1605 | else if (head_need || tail_need) |
23c0752a | 1606 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1607 | else |
1608 | return 0; | |
23c0752a JB |
1609 | |
1610 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1611 | wiphy_debug(local->hw.wiphy, |
1612 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1613 | return -ENOMEM; |
1614 | } | |
1615 | ||
23c0752a JB |
1616 | return 0; |
1617 | } | |
1618 | ||
7c10770f JB |
1619 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1620 | struct sta_info *sta, struct sk_buff *skb) | |
e2ebc74d | 1621 | { |
3b8d81e0 | 1622 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1623 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1624 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1625 | int headroom; |
23c0752a | 1626 | bool may_encrypt; |
e2ebc74d | 1627 | |
3b8d81e0 | 1628 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1629 | |
3b8d81e0 | 1630 | headroom = local->tx_headroom; |
23c0752a | 1631 | if (may_encrypt) |
2475b1cc | 1632 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1633 | headroom -= skb_headroom(skb); |
1634 | headroom = max_t(int, 0, headroom); | |
1635 | ||
3bff1865 | 1636 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1637 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1638 | return; |
e2ebc74d JB |
1639 | } |
1640 | ||
740c1aa3 | 1641 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1642 | info->control.vif = &sdata->vif; |
e2ebc74d | 1643 | |
3f52b7e3 MP |
1644 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1645 | if (ieee80211_is_data(hdr->frame_control) && | |
1646 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1647 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1648 | return; /* skb queued: don't free */ |
1649 | } else { | |
1650 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1651 | } | |
98aed9fd | 1652 | } |
cca89496 | 1653 | |
2154c81c | 1654 | ieee80211_set_qos_hdr(sdata, skb); |
7c10770f | 1655 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
1656 | } |
1657 | ||
73b9f03a JB |
1658 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1659 | { | |
1660 | struct ieee80211_radiotap_iterator iterator; | |
1661 | struct ieee80211_radiotap_header *rthdr = | |
1662 | (struct ieee80211_radiotap_header *) skb->data; | |
1663 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1664 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1665 | NULL); | |
1666 | u16 txflags; | |
1667 | ||
1668 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1669 | IEEE80211_TX_CTL_DONTFRAG; | |
1670 | ||
1671 | /* | |
1672 | * for every radiotap entry that is present | |
1673 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1674 | * entries present, or -EINVAL on error) | |
1675 | */ | |
1676 | ||
1677 | while (!ret) { | |
1678 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1679 | ||
1680 | if (ret) | |
1681 | continue; | |
1682 | ||
1683 | /* see if this argument is something we can use */ | |
1684 | switch (iterator.this_arg_index) { | |
1685 | /* | |
1686 | * You must take care when dereferencing iterator.this_arg | |
1687 | * for multibyte types... the pointer is not aligned. Use | |
1688 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1689 | * iterator.this_arg for type "type" safely on all arches. | |
1690 | */ | |
1691 | case IEEE80211_RADIOTAP_FLAGS: | |
1692 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1693 | /* | |
1694 | * this indicates that the skb we have been | |
1695 | * handed has the 32-bit FCS CRC at the end... | |
1696 | * we should react to that by snipping it off | |
1697 | * because it will be recomputed and added | |
1698 | * on transmission | |
1699 | */ | |
1700 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1701 | return false; | |
1702 | ||
1703 | skb_trim(skb, skb->len - FCS_LEN); | |
1704 | } | |
1705 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1706 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1707 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1708 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1709 | break; | |
1710 | ||
1711 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1712 | txflags = get_unaligned_le16(iterator.this_arg); | |
1713 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1714 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1715 | break; | |
1716 | ||
1717 | /* | |
1718 | * Please update the file | |
1719 | * Documentation/networking/mac80211-injection.txt | |
1720 | * when parsing new fields here. | |
1721 | */ | |
1722 | ||
1723 | default: | |
1724 | break; | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1729 | return false; | |
1730 | ||
1731 | /* | |
1732 | * remove the radiotap header | |
1733 | * iterator->_max_length was sanity-checked against | |
1734 | * skb->len by iterator init | |
1735 | */ | |
1736 | skb_pull(skb, iterator._max_length); | |
1737 | ||
1738 | return true; | |
1739 | } | |
1740 | ||
d0cf9c0d SH |
1741 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1742 | struct net_device *dev) | |
e2ebc74d JB |
1743 | { |
1744 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 1745 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
1746 | struct ieee80211_radiotap_header *prthdr = |
1747 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1748 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1749 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1750 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 1751 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 1752 | u16 len_rthdr; |
5d9cf4a5 | 1753 | int hdrlen; |
e2ebc74d | 1754 | |
9b8a74e3 AG |
1755 | /* check for not even having the fixed radiotap header part */ |
1756 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1757 | goto fail; /* too short to be possibly valid */ | |
1758 | ||
1759 | /* is it a header version we can trust to find length from? */ | |
1760 | if (unlikely(prthdr->it_version)) | |
1761 | goto fail; /* only version 0 is supported */ | |
1762 | ||
1763 | /* then there must be a radiotap header with a length we can use */ | |
1764 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1765 | ||
1766 | /* does the skb contain enough to deliver on the alleged length? */ | |
1767 | if (unlikely(skb->len < len_rthdr)) | |
1768 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1769 | |
e2ebc74d JB |
1770 | /* |
1771 | * fix up the pointers accounting for the radiotap | |
1772 | * header still being in there. We are being given | |
1773 | * a precooked IEEE80211 header so no need for | |
1774 | * normal processing | |
1775 | */ | |
9b8a74e3 | 1776 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1777 | /* |
9b8a74e3 AG |
1778 | * these are just fixed to the end of the rt area since we |
1779 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1780 | */ |
9b8a74e3 AG |
1781 | skb_set_network_header(skb, len_rthdr); |
1782 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1783 | |
5d9cf4a5 JB |
1784 | if (skb->len < len_rthdr + 2) |
1785 | goto fail; | |
1786 | ||
1787 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1788 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1789 | ||
1790 | if (skb->len < len_rthdr + hdrlen) | |
1791 | goto fail; | |
1792 | ||
f75f5c6f HS |
1793 | /* |
1794 | * Initialize skb->protocol if the injected frame is a data frame | |
1795 | * carrying a rfc1042 header | |
1796 | */ | |
5d9cf4a5 JB |
1797 | if (ieee80211_is_data(hdr->frame_control) && |
1798 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1799 | u8 *payload = (u8 *)hdr + hdrlen; | |
1800 | ||
b203ca39 | 1801 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1802 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1803 | payload[7]); | |
f75f5c6f HS |
1804 | } |
1805 | ||
3b8d81e0 JB |
1806 | memset(info, 0, sizeof(*info)); |
1807 | ||
5d9cf4a5 | 1808 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1809 | IEEE80211_TX_CTL_INJECTED; |
1810 | ||
1811 | /* process and remove the injection radiotap header */ | |
1812 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1813 | goto fail; | |
5d9cf4a5 JB |
1814 | |
1815 | rcu_read_lock(); | |
1816 | ||
1817 | /* | |
1818 | * We process outgoing injected frames that have a local address | |
1819 | * we handle as though they are non-injected frames. | |
1820 | * This code here isn't entirely correct, the local MAC address | |
1821 | * isn't always enough to find the interface to use; for proper | |
1822 | * VLAN/WDS support we will need a different mechanism (which | |
1823 | * likely isn't going to be monitor interfaces). | |
1824 | */ | |
1825 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1826 | ||
1827 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1828 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1829 | continue; | |
1830 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1831 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1832 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1833 | continue; | |
b203ca39 | 1834 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1835 | sdata = tmp_sdata; |
1836 | break; | |
1837 | } | |
1838 | } | |
7351c6bd | 1839 | |
55de908a JB |
1840 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1841 | if (!chanctx_conf) { | |
1842 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1843 | if (tmp_sdata) | |
1844 | chanctx_conf = | |
1845 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1846 | } | |
55de908a | 1847 | |
b4a7ff75 | 1848 | if (chanctx_conf) |
b4932836 | 1849 | chandef = &chanctx_conf->def; |
b4a7ff75 | 1850 | else if (!local->use_chanctx) |
b4932836 | 1851 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
1852 | else |
1853 | goto fail_rcu; | |
55de908a JB |
1854 | |
1855 | /* | |
1856 | * Frame injection is not allowed if beaconing is not allowed | |
1857 | * or if we need radar detection. Beaconing is usually not allowed when | |
1858 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1859 | * Passive scan is also used in world regulatory domains where | |
1860 | * your country is not known and as such it should be treated as | |
1861 | * NO TX unless the channel is explicitly allowed in which case | |
1862 | * your current regulatory domain would not have the passive scan | |
1863 | * flag. | |
1864 | * | |
1865 | * Since AP mode uses monitor interfaces to inject/TX management | |
1866 | * frames we can make AP mode the exception to this rule once it | |
1867 | * supports radar detection as its implementation can deal with | |
1868 | * radar detection by itself. We can do that later by adding a | |
1869 | * monitor flag interfaces used for AP support. | |
1870 | */ | |
b4932836 JD |
1871 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
1872 | sdata->vif.type)) | |
55de908a JB |
1873 | goto fail_rcu; |
1874 | ||
73c4e195 | 1875 | info->band = chandef->chan->band; |
7c10770f | 1876 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
1877 | rcu_read_unlock(); |
1878 | ||
e2ebc74d | 1879 | return NETDEV_TX_OK; |
9b8a74e3 | 1880 | |
55de908a JB |
1881 | fail_rcu: |
1882 | rcu_read_unlock(); | |
9b8a74e3 AG |
1883 | fail: |
1884 | dev_kfree_skb(skb); | |
1885 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1886 | } |
1887 | ||
97ffe757 | 1888 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 1889 | { |
97ffe757 | 1890 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 1891 | |
97ffe757 JB |
1892 | return ethertype == ETH_P_TDLS && |
1893 | skb->len > 14 && | |
1894 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
1895 | } | |
1896 | ||
1897 | static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, | |
1898 | struct sk_buff *skb, | |
1899 | struct sta_info **sta_out) | |
1900 | { | |
1901 | struct sta_info *sta; | |
1902 | ||
1903 | switch (sdata->vif.type) { | |
1904 | case NL80211_IFTYPE_AP_VLAN: | |
1905 | sta = rcu_dereference(sdata->u.vlan.sta); | |
1906 | if (sta) { | |
1907 | *sta_out = sta; | |
1908 | return 0; | |
1909 | } else if (sdata->wdev.use_4addr) { | |
1910 | return -ENOLINK; | |
1911 | } | |
1912 | /* fall through */ | |
1913 | case NL80211_IFTYPE_AP: | |
1914 | case NL80211_IFTYPE_OCB: | |
1915 | case NL80211_IFTYPE_ADHOC: | |
1916 | if (is_multicast_ether_addr(skb->data)) { | |
1917 | *sta_out = ERR_PTR(-ENOENT); | |
1918 | return 0; | |
1919 | } | |
1920 | sta = sta_info_get_bss(sdata, skb->data); | |
1921 | break; | |
1922 | case NL80211_IFTYPE_WDS: | |
1923 | sta = sta_info_get(sdata, sdata->u.wds.remote_addr); | |
1924 | break; | |
1925 | #ifdef CONFIG_MAC80211_MESH | |
1926 | case NL80211_IFTYPE_MESH_POINT: | |
1927 | /* determined much later */ | |
1928 | *sta_out = NULL; | |
1929 | return 0; | |
1930 | #endif | |
1931 | case NL80211_IFTYPE_STATION: | |
1932 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
1933 | sta = sta_info_get(sdata, skb->data); | |
1934 | if (sta) { | |
1935 | bool tdls_peer, tdls_auth; | |
1936 | ||
1937 | tdls_peer = test_sta_flag(sta, | |
1938 | WLAN_STA_TDLS_PEER); | |
1939 | tdls_auth = test_sta_flag(sta, | |
1940 | WLAN_STA_TDLS_PEER_AUTH); | |
1941 | ||
1942 | if (tdls_peer && tdls_auth) { | |
1943 | *sta_out = sta; | |
1944 | return 0; | |
1945 | } | |
1946 | ||
1947 | /* | |
1948 | * TDLS link during setup - throw out frames to | |
1949 | * peer. Allow TDLS-setup frames to unauthorized | |
1950 | * peers for the special case of a link teardown | |
1951 | * after a TDLS sta is removed due to being | |
1952 | * unreachable. | |
1953 | */ | |
1954 | if (tdls_peer && !tdls_auth && | |
1955 | !ieee80211_is_tdls_setup(skb)) | |
1956 | return -EINVAL; | |
1957 | } | |
1958 | ||
1959 | } | |
1960 | ||
1961 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
1962 | if (!sta) | |
1963 | return -ENOLINK; | |
1964 | break; | |
1965 | default: | |
1966 | return -EINVAL; | |
1967 | } | |
1968 | ||
1969 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
1970 | return 0; | |
ad38bfc9 MG |
1971 | } |
1972 | ||
e2ebc74d | 1973 | /** |
4c9451ed JB |
1974 | * ieee80211_build_hdr - build 802.11 header in the given frame |
1975 | * @sdata: virtual interface to build the header for | |
1976 | * @skb: the skb to build the header in | |
24d342c5 | 1977 | * @info_flags: skb flags to set |
e2ebc74d | 1978 | * |
4c9451ed JB |
1979 | * This function takes the skb with 802.3 header and reformats the header to |
1980 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
1981 | * being transmitted on. | |
1982 | * | |
1983 | * Note that this function also takes care of the TX status request and | |
1984 | * potential unsharing of the SKB - this needs to be interleaved with the | |
1985 | * header building. | |
e2ebc74d | 1986 | * |
4c9451ed JB |
1987 | * The function requires the read-side RCU lock held |
1988 | * | |
1989 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 1990 | */ |
4c9451ed | 1991 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 1992 | struct sk_buff *skb, u32 info_flags, |
97ffe757 | 1993 | struct sta_info *sta) |
e2ebc74d | 1994 | { |
133b8226 | 1995 | struct ieee80211_local *local = sdata->local; |
489ee919 | 1996 | struct ieee80211_tx_info *info; |
dcf33963 | 1997 | int head_need; |
065e9605 HH |
1998 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1999 | __le16 fc; | |
e2ebc74d | 2000 | struct ieee80211_hdr hdr; |
ff67bb86 | 2001 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 2002 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
2003 | const u8 *encaps_data; |
2004 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 2005 | int nh_pos, h_pos; |
97ffe757 JB |
2006 | bool wme_sta = false, authorized = false; |
2007 | bool tdls_peer; | |
a729cff8 | 2008 | bool multicast; |
a729cff8 | 2009 | u16 info_id = 0; |
55de908a JB |
2010 | struct ieee80211_chanctx_conf *chanctx_conf; |
2011 | struct ieee80211_sub_if_data *ap_sdata; | |
2012 | enum ieee80211_band band; | |
4c9451ed | 2013 | int ret; |
e2ebc74d | 2014 | |
97ffe757 JB |
2015 | if (IS_ERR(sta)) |
2016 | sta = NULL; | |
2017 | ||
e2ebc74d JB |
2018 | /* convert Ethernet header to proper 802.11 header (based on |
2019 | * operation mode) */ | |
2020 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 2021 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 2022 | |
51fb61e7 | 2023 | switch (sdata->vif.type) { |
05c914fe | 2024 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 2025 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
2026 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
2027 | /* RA TA DA SA */ | |
2028 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 2029 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2030 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2031 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2032 | hdrlen = 30; | |
c2c98fde | 2033 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 2034 | wme_sta = sta->sta.wme; |
f14543ee | 2035 | } |
55de908a JB |
2036 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
2037 | u.ap); | |
2038 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
2039 | if (!chanctx_conf) { |
2040 | ret = -ENOTCONN; | |
2041 | goto free; | |
2042 | } | |
4bf88530 | 2043 | band = chanctx_conf->def.chan->band; |
97ffe757 | 2044 | if (sdata->wdev.use_4addr) |
f14543ee FF |
2045 | break; |
2046 | /* fall through */ | |
2047 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
2048 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
2049 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2050 | if (!chanctx_conf) { |
2051 | ret = -ENOTCONN; | |
2052 | goto free; | |
2053 | } | |
065e9605 | 2054 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
2055 | /* DA BSSID SA */ |
2056 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 2057 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2058 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
2059 | hdrlen = 24; | |
4bf88530 | 2060 | band = chanctx_conf->def.chan->band; |
cf966838 | 2061 | break; |
05c914fe | 2062 | case NL80211_IFTYPE_WDS: |
065e9605 | 2063 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
2064 | /* RA TA DA SA */ |
2065 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 2066 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2067 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2068 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2069 | hdrlen = 30; | |
55de908a JB |
2070 | /* |
2071 | * This is the exception! WDS style interfaces are prohibited | |
2072 | * when channel contexts are in used so this must be valid | |
2073 | */ | |
675a0b04 | 2074 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 2075 | break; |
33b64eb2 | 2076 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 2077 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 2078 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
2079 | struct sta_info *next_hop; |
2080 | bool mpp_lookup = true; | |
2081 | ||
bf7cd94d | 2082 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
2083 | if (mpath) { |
2084 | mpp_lookup = false; | |
2085 | next_hop = rcu_dereference(mpath->next_hop); | |
2086 | if (!next_hop || | |
2087 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
2088 | MESH_PATH_RESOLVING))) | |
2089 | mpp_lookup = true; | |
2090 | } | |
2091 | ||
2092 | if (mpp_lookup) | |
bf7cd94d | 2093 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
2094 | |
2095 | if (mppath && mpath) | |
2096 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 2097 | } |
79617dee | 2098 | |
f76b57b4 | 2099 | /* |
9d52501b JF |
2100 | * Use address extension if it is a packet from |
2101 | * another interface or if we know the destination | |
2102 | * is being proxied by a portal (i.e. portal address | |
2103 | * differs from proxied address) | |
f76b57b4 | 2104 | */ |
b203ca39 JP |
2105 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2106 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2107 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2108 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2109 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2110 | NULL, NULL); | |
79617dee | 2111 | } else { |
27f01124 TP |
2112 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2113 | * For unicast with unknown forwarding information, | |
2114 | * destination might be in the MBSS or if that fails | |
2115 | * forwarded to another mesh gate. In either case | |
2116 | * resolution will be handled in ieee80211_xmit(), so | |
2117 | * leave the original DA. This also works for mcast */ | |
2118 | const u8 *mesh_da = skb->data; | |
2119 | ||
2120 | if (mppath) | |
2121 | mesh_da = mppath->mpp; | |
2122 | else if (mpath) | |
2123 | mesh_da = mpath->dst; | |
79617dee | 2124 | |
3c5772a5 | 2125 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2126 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2127 | if (is_multicast_ether_addr(mesh_da)) |
2128 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2129 | meshhdrlen = ieee80211_new_mesh_header( |
2130 | sdata, &mesh_hdr, | |
2131 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2132 | else |
27f01124 | 2133 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2134 | meshhdrlen = ieee80211_new_mesh_header( |
2135 | sdata, &mesh_hdr, skb->data, | |
2136 | skb->data + ETH_ALEN); | |
79617dee | 2137 | |
79617dee | 2138 | } |
55de908a | 2139 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2140 | if (!chanctx_conf) { |
2141 | ret = -ENOTCONN; | |
2142 | goto free; | |
2143 | } | |
4bf88530 | 2144 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
2145 | break; |
2146 | #endif | |
05c914fe | 2147 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2148 | /* we already did checks when looking up the RA STA */ |
2149 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2150 | |
97ffe757 | 2151 | if (tdls_peer) { |
941c93cd AN |
2152 | /* DA SA BSSID */ |
2153 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2154 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2155 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2156 | hdrlen = 24; | |
2157 | } else if (sdata->u.mgd.use_4addr && | |
2158 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2159 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2160 | IEEE80211_FCTL_TODS); | |
f14543ee | 2161 | /* RA TA DA SA */ |
941c93cd | 2162 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2163 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2164 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2165 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2166 | hdrlen = 30; | |
2167 | } else { | |
2168 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2169 | /* BSSID SA DA */ | |
941c93cd | 2170 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2171 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2172 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2173 | hdrlen = 24; | |
2174 | } | |
55de908a | 2175 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2176 | if (!chanctx_conf) { |
2177 | ret = -ENOTCONN; | |
2178 | goto free; | |
2179 | } | |
4bf88530 | 2180 | band = chanctx_conf->def.chan->band; |
cf966838 | 2181 | break; |
239281f8 RL |
2182 | case NL80211_IFTYPE_OCB: |
2183 | /* DA SA BSSID */ | |
2184 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2185 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2186 | eth_broadcast_addr(hdr.addr3); | |
2187 | hdrlen = 24; | |
2188 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2189 | if (!chanctx_conf) { |
2190 | ret = -ENOTCONN; | |
2191 | goto free; | |
2192 | } | |
239281f8 RL |
2193 | band = chanctx_conf->def.chan->band; |
2194 | break; | |
05c914fe | 2195 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2196 | /* DA SA BSSID */ |
2197 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2198 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2199 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2200 | hdrlen = 24; |
55de908a | 2201 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2202 | if (!chanctx_conf) { |
2203 | ret = -ENOTCONN; | |
2204 | goto free; | |
2205 | } | |
4bf88530 | 2206 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2207 | break; |
2208 | default: | |
4c9451ed JB |
2209 | ret = -EINVAL; |
2210 | goto free; | |
e2ebc74d JB |
2211 | } |
2212 | ||
a729cff8 | 2213 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2214 | |
97ffe757 JB |
2215 | /* sta is always NULL for mesh */ |
2216 | if (sta) { | |
2217 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2218 | wme_sta = sta->sta.wme; | |
2219 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2220 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2221 | wme_sta = true; |
97ffe757 | 2222 | } |
4777be41 | 2223 | |
527871d7 JB |
2224 | /* receiver does QoS (which also means we do) use it */ |
2225 | if (wme_sta) { | |
065e9605 | 2226 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2227 | hdrlen += 2; |
2228 | } | |
2229 | ||
2230 | /* | |
238814fd JB |
2231 | * Drop unicast frames to unauthorised stations unless they are |
2232 | * EAPOL frames from the local station. | |
ce3edf6d | 2233 | */ |
55182e4a | 2234 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2235 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2236 | !multicast && !authorized && |
55182e4a | 2237 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2238 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2239 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2240 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2241 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2242 | #endif |
2243 | ||
2244 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2245 | ||
4c9451ed JB |
2246 | ret = -EPERM; |
2247 | goto free; | |
ce3edf6d JB |
2248 | } |
2249 | ||
a729cff8 JB |
2250 | if (unlikely(!multicast && skb->sk && |
2251 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2252 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2253 | |
bf7fa551 | 2254 | if (ack_skb) { |
a729cff8 | 2255 | unsigned long flags; |
9475af6e | 2256 | int id; |
a729cff8 JB |
2257 | |
2258 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2259 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2260 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2261 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2262 | ||
9475af6e | 2263 | if (id >= 0) { |
a729cff8 JB |
2264 | info_id = id; |
2265 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2266 | } else { |
bf7fa551 | 2267 | kfree_skb(ack_skb); |
a729cff8 | 2268 | } |
a729cff8 JB |
2269 | } |
2270 | } | |
2271 | ||
7e244707 HS |
2272 | /* |
2273 | * If the skb is shared we need to obtain our own copy. | |
2274 | */ | |
2275 | if (skb_shared(skb)) { | |
a729cff8 JB |
2276 | struct sk_buff *tmp_skb = skb; |
2277 | ||
2278 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2279 | WARN_ON(info_id); | |
2280 | ||
f8a0a781 | 2281 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2282 | kfree_skb(tmp_skb); |
2283 | ||
4c9451ed JB |
2284 | if (!skb) { |
2285 | ret = -ENOMEM; | |
2286 | goto free; | |
2287 | } | |
7e244707 HS |
2288 | } |
2289 | ||
065e9605 | 2290 | hdr.frame_control = fc; |
e2ebc74d JB |
2291 | hdr.duration_id = 0; |
2292 | hdr.seq_ctrl = 0; | |
2293 | ||
2294 | skip_header_bytes = ETH_HLEN; | |
2295 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2296 | encaps_data = bridge_tunnel_header; | |
2297 | encaps_len = sizeof(bridge_tunnel_header); | |
2298 | skip_header_bytes -= 2; | |
e5c5d22e | 2299 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2300 | encaps_data = rfc1042_header; |
2301 | encaps_len = sizeof(rfc1042_header); | |
2302 | skip_header_bytes -= 2; | |
2303 | } else { | |
2304 | encaps_data = NULL; | |
2305 | encaps_len = 0; | |
2306 | } | |
2307 | ||
7e244707 HS |
2308 | nh_pos = skb_network_header(skb) - skb->data; |
2309 | h_pos = skb_transport_header(skb) - skb->data; | |
2310 | ||
e2ebc74d JB |
2311 | skb_pull(skb, skip_header_bytes); |
2312 | nh_pos -= skip_header_bytes; | |
2313 | h_pos -= skip_header_bytes; | |
2314 | ||
23c0752a | 2315 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2316 | |
23c0752a JB |
2317 | /* |
2318 | * So we need to modify the skb header and hence need a copy of | |
2319 | * that. The head_need variable above doesn't, so far, include | |
2320 | * the needed header space that we don't need right away. If we | |
2321 | * can, then we don't reallocate right now but only after the | |
2322 | * frame arrives at the master device (if it does...) | |
2323 | * | |
2324 | * If we cannot, however, then we will reallocate to include all | |
2325 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2326 | * make it big enough for everything we may ever need. | |
2327 | */ | |
e2ebc74d | 2328 | |
3a5be7d4 | 2329 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2330 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2331 | head_need += local->tx_headroom; |
2332 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2333 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2334 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2335 | skb = NULL; |
4c9451ed | 2336 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2337 | } |
e2ebc74d JB |
2338 | } |
2339 | ||
2340 | if (encaps_data) { | |
2341 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2342 | nh_pos += encaps_len; | |
2343 | h_pos += encaps_len; | |
2344 | } | |
c29b9b9b | 2345 | |
e4ab7eb0 | 2346 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2347 | if (meshhdrlen > 0) { |
2348 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2349 | nh_pos += meshhdrlen; | |
2350 | h_pos += meshhdrlen; | |
2351 | } | |
e4ab7eb0 | 2352 | #endif |
33b64eb2 | 2353 | |
065e9605 | 2354 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2355 | __le16 *qos_control; |
2356 | ||
f359d3fe | 2357 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2358 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2359 | /* | |
2360 | * Maybe we could actually set some fields here, for now just | |
2361 | * initialise to zero to indicate no special operation. | |
2362 | */ | |
2363 | *qos_control = 0; | |
2364 | } else | |
2365 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2366 | ||
e2ebc74d JB |
2367 | nh_pos += hdrlen; |
2368 | h_pos += hdrlen; | |
2369 | ||
e2ebc74d JB |
2370 | /* Update skb pointers to various headers since this modified frame |
2371 | * is going to go through Linux networking code that may potentially | |
2372 | * need things like pointer to IP header. */ | |
2373 | skb_set_mac_header(skb, 0); | |
2374 | skb_set_network_header(skb, nh_pos); | |
2375 | skb_set_transport_header(skb, h_pos); | |
2376 | ||
489ee919 | 2377 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2378 | memset(info, 0, sizeof(*info)); |
2379 | ||
a729cff8 JB |
2380 | info->flags = info_flags; |
2381 | info->ack_frame_id = info_id; | |
73c4e195 | 2382 | info->band = band; |
a729cff8 | 2383 | |
4c9451ed JB |
2384 | return skb; |
2385 | free: | |
2386 | kfree_skb(skb); | |
2387 | return ERR_PTR(ret); | |
2388 | } | |
2389 | ||
17c18bf8 JB |
2390 | /* |
2391 | * fast-xmit overview | |
2392 | * | |
2393 | * The core idea of this fast-xmit is to remove per-packet checks by checking | |
2394 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band | |
2395 | * checks that are needed to get the sta->fast_tx pointer assigned, after which | |
2396 | * much less work can be done per packet. For example, fragmentation must be | |
2397 | * disabled or the fast_tx pointer will not be set. All the conditions are seen | |
2398 | * in the code here. | |
2399 | * | |
2400 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 | |
2401 | * header and other data to aid packet processing in ieee80211_xmit_fast(). | |
2402 | * | |
2403 | * The most difficult part of this is that when any of these assumptions | |
2404 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), | |
2405 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, | |
2406 | * since the per-packet code no longer checks the conditions. This is reflected | |
2407 | * by the calls to these functions throughout the rest of the code, and must be | |
2408 | * maintained if any of the TX path checks change. | |
2409 | */ | |
2410 | ||
2411 | void ieee80211_check_fast_xmit(struct sta_info *sta) | |
2412 | { | |
2413 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; | |
2414 | struct ieee80211_local *local = sta->local; | |
2415 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2416 | struct ieee80211_hdr *hdr = (void *)build.hdr; | |
2417 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2418 | __le16 fc; | |
2419 | ||
2420 | if (!(local->hw.flags & IEEE80211_HW_SUPPORT_FAST_XMIT)) | |
2421 | return; | |
2422 | ||
2423 | /* Locking here protects both the pointer itself, and against concurrent | |
2424 | * invocations winning data access races to, e.g., the key pointer that | |
2425 | * is used. | |
2426 | * Without it, the invocation of this function right after the key | |
2427 | * pointer changes wouldn't be sufficient, as another CPU could access | |
2428 | * the pointer, then stall, and then do the cache update after the CPU | |
2429 | * that invalidated the key. | |
2430 | * With the locking, such scenarios cannot happen as the check for the | |
2431 | * key and the fast-tx assignment are done atomically, so the CPU that | |
2432 | * modifies the key will either wait or other one will see the key | |
2433 | * cleared/changed already. | |
2434 | */ | |
2435 | spin_lock_bh(&sta->lock); | |
2436 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS && | |
2437 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
2438 | sdata->vif.type == NL80211_IFTYPE_STATION) | |
2439 | goto out; | |
2440 | ||
2441 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2442 | goto out; | |
2443 | ||
2444 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
2445 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
2446 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) | |
2447 | goto out; | |
2448 | ||
2449 | if (sdata->noack_map) | |
2450 | goto out; | |
2451 | ||
2452 | /* fast-xmit doesn't handle fragmentation at all */ | |
725b812c JB |
2453 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
2454 | !local->ops->set_frag_threshold) | |
17c18bf8 JB |
2455 | goto out; |
2456 | ||
2457 | rcu_read_lock(); | |
2458 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2459 | if (!chanctx_conf) { | |
2460 | rcu_read_unlock(); | |
2461 | goto out; | |
2462 | } | |
2463 | build.band = chanctx_conf->def.chan->band; | |
2464 | rcu_read_unlock(); | |
2465 | ||
2466 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
2467 | ||
2468 | switch (sdata->vif.type) { | |
3ffd8840 JB |
2469 | case NL80211_IFTYPE_ADHOC: |
2470 | /* DA SA BSSID */ | |
2471 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2472 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2473 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); | |
2474 | build.hdr_len = 24; | |
2475 | break; | |
17c18bf8 JB |
2476 | case NL80211_IFTYPE_STATION: |
2477 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { | |
2478 | /* DA SA BSSID */ | |
2479 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2480 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2481 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2482 | build.hdr_len = 24; | |
2483 | break; | |
2484 | } | |
2485 | ||
2486 | if (sdata->u.mgd.use_4addr) { | |
2487 | /* non-regular ethertype cannot use the fastpath */ | |
2488 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2489 | IEEE80211_FCTL_TODS); | |
2490 | /* RA TA DA SA */ | |
2491 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2492 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2493 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2494 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2495 | build.hdr_len = 30; | |
2496 | break; | |
2497 | } | |
2498 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2499 | /* BSSID SA DA */ | |
2500 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2501 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2502 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2503 | build.hdr_len = 24; | |
2504 | break; | |
2505 | case NL80211_IFTYPE_AP_VLAN: | |
2506 | if (sdata->wdev.use_4addr) { | |
2507 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2508 | IEEE80211_FCTL_TODS); | |
2509 | /* RA TA DA SA */ | |
2510 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); | |
2511 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2512 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2513 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2514 | build.hdr_len = 30; | |
2515 | break; | |
2516 | } | |
2517 | /* fall through */ | |
2518 | case NL80211_IFTYPE_AP: | |
2519 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
2520 | /* DA BSSID SA */ | |
2521 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2522 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2523 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
2524 | build.hdr_len = 24; | |
2525 | break; | |
2526 | default: | |
2527 | /* not handled on fast-xmit */ | |
2528 | goto out; | |
2529 | } | |
2530 | ||
2531 | if (sta->sta.wme) { | |
2532 | build.hdr_len += 2; | |
2533 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
2534 | } | |
2535 | ||
2536 | /* We store the key here so there's no point in using rcu_dereference() | |
2537 | * but that's fine because the code that changes the pointers will call | |
2538 | * this function after doing so. For a single CPU that would be enough, | |
2539 | * for multiple see the comment above. | |
2540 | */ | |
2541 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); | |
2542 | if (!build.key) | |
2543 | build.key = rcu_access_pointer(sdata->default_unicast_key); | |
2544 | if (build.key) { | |
e495c247 | 2545 | bool gen_iv, iv_spc, mmic; |
17c18bf8 JB |
2546 | |
2547 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; | |
2548 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; | |
e495c247 | 2549 | mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC; |
17c18bf8 JB |
2550 | |
2551 | /* don't handle software crypto */ | |
2552 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
2553 | goto out; | |
2554 | ||
2555 | switch (build.key->conf.cipher) { | |
2556 | case WLAN_CIPHER_SUITE_CCMP: | |
2557 | case WLAN_CIPHER_SUITE_CCMP_256: | |
2558 | /* add fixed key ID */ | |
2559 | if (gen_iv) { | |
2560 | (build.hdr + build.hdr_len)[3] = | |
2561 | 0x20 | (build.key->conf.keyidx << 6); | |
2562 | build.pn_offs = build.hdr_len; | |
2563 | } | |
2564 | if (gen_iv || iv_spc) | |
2565 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; | |
2566 | break; | |
2567 | case WLAN_CIPHER_SUITE_GCMP: | |
2568 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2569 | /* add fixed key ID */ | |
2570 | if (gen_iv) { | |
2571 | (build.hdr + build.hdr_len)[3] = | |
2572 | 0x20 | (build.key->conf.keyidx << 6); | |
2573 | build.pn_offs = build.hdr_len; | |
2574 | } | |
2575 | if (gen_iv || iv_spc) | |
2576 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; | |
2577 | break; | |
e495c247 JB |
2578 | case WLAN_CIPHER_SUITE_TKIP: |
2579 | /* cannot handle MMIC or IV generation in xmit-fast */ | |
2580 | if (mmic || gen_iv) | |
2581 | goto out; | |
2582 | if (iv_spc) | |
2583 | build.hdr_len += IEEE80211_TKIP_IV_LEN; | |
2584 | break; | |
2585 | case WLAN_CIPHER_SUITE_WEP40: | |
2586 | case WLAN_CIPHER_SUITE_WEP104: | |
2587 | /* cannot handle IV generation in fast-xmit */ | |
2588 | if (gen_iv) | |
2589 | goto out; | |
2590 | if (iv_spc) | |
2591 | build.hdr_len += IEEE80211_WEP_IV_LEN; | |
2592 | break; | |
2593 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
2594 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
2595 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
2596 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
2597 | WARN(1, | |
2598 | "management cipher suite 0x%x enabled for data\n", | |
2599 | build.key->conf.cipher); | |
17c18bf8 | 2600 | goto out; |
e495c247 JB |
2601 | default: |
2602 | /* we don't know how to generate IVs for this at all */ | |
2603 | if (WARN_ON(gen_iv)) | |
2604 | goto out; | |
2605 | /* pure hardware keys are OK, of course */ | |
2606 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) | |
2607 | break; | |
2608 | /* cipher scheme might require space allocation */ | |
2609 | if (iv_spc && | |
2610 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) | |
2611 | goto out; | |
2612 | if (iv_spc) | |
2613 | build.hdr_len += build.key->conf.iv_len; | |
17c18bf8 JB |
2614 | } |
2615 | ||
2616 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
2617 | } | |
2618 | ||
2619 | hdr->frame_control = fc; | |
2620 | ||
2621 | memcpy(build.hdr + build.hdr_len, | |
2622 | rfc1042_header, sizeof(rfc1042_header)); | |
2623 | build.hdr_len += sizeof(rfc1042_header); | |
2624 | ||
2625 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); | |
2626 | /* if the kmemdup fails, continue w/o fast_tx */ | |
2627 | if (!fast_tx) | |
2628 | goto out; | |
2629 | ||
2630 | out: | |
2631 | /* we might have raced against another call to this function */ | |
2632 | old = rcu_dereference_protected(sta->fast_tx, | |
2633 | lockdep_is_held(&sta->lock)); | |
2634 | rcu_assign_pointer(sta->fast_tx, fast_tx); | |
2635 | if (old) | |
2636 | kfree_rcu(old, rcu_head); | |
2637 | spin_unlock_bh(&sta->lock); | |
2638 | } | |
2639 | ||
2640 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) | |
2641 | { | |
2642 | struct sta_info *sta; | |
2643 | ||
2644 | rcu_read_lock(); | |
2645 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
2646 | ieee80211_check_fast_xmit(sta); | |
2647 | rcu_read_unlock(); | |
2648 | } | |
2649 | ||
2650 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) | |
2651 | { | |
2652 | struct ieee80211_local *local = sdata->local; | |
2653 | struct sta_info *sta; | |
2654 | ||
2655 | rcu_read_lock(); | |
2656 | ||
2657 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
2658 | if (sdata != sta->sdata && | |
2659 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
2660 | continue; | |
2661 | ieee80211_check_fast_xmit(sta); | |
2662 | } | |
2663 | ||
2664 | rcu_read_unlock(); | |
2665 | } | |
2666 | ||
2667 | void ieee80211_clear_fast_xmit(struct sta_info *sta) | |
2668 | { | |
2669 | struct ieee80211_fast_tx *fast_tx; | |
2670 | ||
2671 | spin_lock_bh(&sta->lock); | |
2672 | fast_tx = rcu_dereference_protected(sta->fast_tx, | |
2673 | lockdep_is_held(&sta->lock)); | |
2674 | RCU_INIT_POINTER(sta->fast_tx, NULL); | |
2675 | spin_unlock_bh(&sta->lock); | |
2676 | ||
2677 | if (fast_tx) | |
2678 | kfree_rcu(fast_tx, rcu_head); | |
2679 | } | |
2680 | ||
2681 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, | |
2682 | struct net_device *dev, struct sta_info *sta, | |
2683 | struct ieee80211_fast_tx *fast_tx, | |
2684 | struct sk_buff *skb) | |
2685 | { | |
2686 | struct ieee80211_local *local = sdata->local; | |
2687 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; | |
2688 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); | |
2689 | int hw_headroom = sdata->local->hw.extra_tx_headroom; | |
2690 | struct ethhdr eth; | |
2691 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2692 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; | |
2693 | struct ieee80211_tx_data tx; | |
2694 | ieee80211_tx_result r; | |
2695 | struct tid_ampdu_tx *tid_tx = NULL; | |
2696 | u8 tid = IEEE80211_NUM_TIDS; | |
2697 | ||
2698 | /* control port protocol needs a lot of special handling */ | |
2699 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) | |
2700 | return false; | |
2701 | ||
2702 | /* only RFC 1042 SNAP */ | |
2703 | if (ethertype < ETH_P_802_3_MIN) | |
2704 | return false; | |
2705 | ||
2706 | /* don't handle TX status request here either */ | |
2707 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) | |
2708 | return false; | |
2709 | ||
2710 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
2711 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
2712 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
2713 | if (tid_tx && | |
2714 | !test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) | |
2715 | return false; | |
2716 | } | |
2717 | ||
2718 | /* after this point (skb is modified) we cannot return false */ | |
2719 | ||
2720 | if (skb_shared(skb)) { | |
2721 | struct sk_buff *tmp_skb = skb; | |
2722 | ||
2723 | skb = skb_clone(skb, GFP_ATOMIC); | |
2724 | kfree_skb(tmp_skb); | |
2725 | ||
2726 | if (!skb) | |
2727 | return true; | |
2728 | } | |
2729 | ||
2730 | dev->stats.tx_packets++; | |
2731 | dev->stats.tx_bytes += skb->len + extra_head; | |
2732 | dev->trans_start = jiffies; | |
2733 | ||
2734 | /* will not be crypto-handled beyond what we do here, so use false | |
2735 | * as the may-encrypt argument for the resize to not account for | |
2736 | * more room than we already have in 'extra_head' | |
2737 | */ | |
2738 | if (unlikely(ieee80211_skb_resize(sdata, skb, | |
2739 | max_t(int, extra_head + hw_headroom - | |
2740 | skb_headroom(skb), 0), | |
2741 | false))) { | |
2742 | kfree_skb(skb); | |
2743 | return true; | |
2744 | } | |
2745 | ||
2746 | memcpy(ð, skb->data, ETH_HLEN - 2); | |
2747 | hdr = (void *)skb_push(skb, extra_head); | |
2748 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); | |
2749 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); | |
2750 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); | |
2751 | ||
2752 | memset(info, 0, sizeof(*info)); | |
2753 | info->band = fast_tx->band; | |
2754 | info->control.vif = &sdata->vif; | |
2755 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | | |
2756 | IEEE80211_TX_CTL_DONTFRAG | | |
2757 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); | |
2758 | ||
2759 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
2760 | *ieee80211_get_qos_ctl(hdr) = tid; | |
2761 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); | |
2762 | } else { | |
2763 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
2764 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); | |
2765 | sdata->sequence_number += 0x10; | |
2766 | } | |
2767 | ||
2768 | sta->tx_msdu[tid]++; | |
2769 | ||
2770 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
2771 | ||
2772 | __skb_queue_head_init(&tx.skbs); | |
2773 | ||
2774 | tx.flags = IEEE80211_TX_UNICAST; | |
2775 | tx.local = local; | |
2776 | tx.sdata = sdata; | |
2777 | tx.sta = sta; | |
2778 | tx.key = fast_tx->key; | |
2779 | ||
2780 | if (fast_tx->key) | |
2781 | info->control.hw_key = &fast_tx->key->conf; | |
2782 | ||
2783 | if (!(local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) { | |
2784 | tx.skb = skb; | |
2785 | r = ieee80211_tx_h_rate_ctrl(&tx); | |
2786 | skb = tx.skb; | |
2787 | tx.skb = NULL; | |
2788 | ||
2789 | if (r != TX_CONTINUE) { | |
2790 | if (r != TX_QUEUED) | |
2791 | kfree_skb(skb); | |
2792 | return true; | |
2793 | } | |
2794 | } | |
2795 | ||
2796 | /* statistics normally done by ieee80211_tx_h_stats (but that | |
2797 | * has to consider fragmentation, so is more complex) | |
2798 | */ | |
2799 | sta->tx_fragments++; | |
2800 | sta->tx_bytes[skb_get_queue_mapping(skb)] += skb->len; | |
2801 | sta->tx_packets[skb_get_queue_mapping(skb)]++; | |
2802 | ||
2803 | if (fast_tx->pn_offs) { | |
2804 | u64 pn; | |
2805 | u8 *crypto_hdr = skb->data + fast_tx->pn_offs; | |
2806 | ||
2807 | switch (fast_tx->key->conf.cipher) { | |
2808 | case WLAN_CIPHER_SUITE_CCMP: | |
2809 | case WLAN_CIPHER_SUITE_CCMP_256: | |
2810 | pn = atomic64_inc_return(&fast_tx->key->u.ccmp.tx_pn); | |
2811 | crypto_hdr[0] = pn; | |
2812 | crypto_hdr[1] = pn >> 8; | |
2813 | crypto_hdr[4] = pn >> 16; | |
2814 | crypto_hdr[5] = pn >> 24; | |
2815 | crypto_hdr[6] = pn >> 32; | |
2816 | crypto_hdr[7] = pn >> 40; | |
2817 | break; | |
2818 | case WLAN_CIPHER_SUITE_GCMP: | |
2819 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2820 | pn = atomic64_inc_return(&fast_tx->key->u.gcmp.tx_pn); | |
2821 | crypto_hdr[0] = pn; | |
2822 | crypto_hdr[1] = pn >> 8; | |
2823 | crypto_hdr[4] = pn >> 16; | |
2824 | crypto_hdr[5] = pn >> 24; | |
2825 | crypto_hdr[6] = pn >> 32; | |
2826 | crypto_hdr[7] = pn >> 40; | |
2827 | break; | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
2832 | sdata = container_of(sdata->bss, | |
2833 | struct ieee80211_sub_if_data, u.ap); | |
2834 | ||
2835 | __skb_queue_tail(&tx.skbs, skb); | |
2836 | ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false); | |
2837 | return true; | |
2838 | } | |
2839 | ||
4c9451ed JB |
2840 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
2841 | struct net_device *dev, | |
2842 | u32 info_flags) | |
2843 | { | |
2844 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
97ffe757 | 2845 | struct sta_info *sta; |
4c9451ed JB |
2846 | |
2847 | if (unlikely(skb->len < ETH_HLEN)) { | |
2848 | kfree_skb(skb); | |
2849 | return; | |
2850 | } | |
2851 | ||
2852 | rcu_read_lock(); | |
e2ebc74d | 2853 | |
2d981fdd JB |
2854 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
2855 | goto out_free; | |
4c9451ed | 2856 | |
17c18bf8 JB |
2857 | if (!IS_ERR_OR_NULL(sta)) { |
2858 | struct ieee80211_fast_tx *fast_tx; | |
2859 | ||
2860 | fast_tx = rcu_dereference(sta->fast_tx); | |
2861 | ||
2862 | if (fast_tx && | |
2863 | ieee80211_xmit_fast(sdata, dev, sta, fast_tx, skb)) | |
2864 | goto out; | |
2865 | } | |
2866 | ||
2d981fdd JB |
2867 | /* the frame could be fragmented, software-encrypted, and other things |
2868 | * so we cannot really handle checksum offload with it - fix it up in | |
2869 | * software before we handle anything else. | |
2870 | */ | |
2871 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
2872 | if (skb->encapsulation) | |
2873 | skb_set_inner_transport_header(skb, | |
2874 | skb_checksum_start_offset(skb)); | |
2875 | else | |
2876 | skb_set_transport_header(skb, | |
2877 | skb_checksum_start_offset(skb)); | |
2878 | if (skb_checksum_help(skb)) | |
2879 | goto out_free; | |
2880 | } | |
2881 | ||
97ffe757 | 2882 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); |
4c9451ed JB |
2883 | if (IS_ERR(skb)) |
2884 | goto out; | |
2885 | ||
2886 | dev->stats.tx_packets++; | |
2887 | dev->stats.tx_bytes += skb->len; | |
2888 | dev->trans_start = jiffies; | |
e2ebc74d | 2889 | |
7c10770f | 2890 | ieee80211_xmit(sdata, sta, skb); |
2d981fdd JB |
2891 | goto out; |
2892 | out_free: | |
2893 | kfree_skb(skb); | |
4c9451ed | 2894 | out: |
55de908a | 2895 | rcu_read_unlock(); |
e2ebc74d JB |
2896 | } |
2897 | ||
4c9451ed JB |
2898 | /** |
2899 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
2900 | * @skb: packet to be sent | |
2901 | * @dev: incoming interface | |
2902 | * | |
2903 | * On failure skb will be freed. | |
2904 | */ | |
24d342c5 LK |
2905 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
2906 | struct net_device *dev) | |
2907 | { | |
2908 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
2909 | return NETDEV_TX_OK; | |
2910 | } | |
e2ebc74d | 2911 | |
7528ec57 JB |
2912 | struct sk_buff * |
2913 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
2914 | struct sk_buff *skb, u32 info_flags) | |
2915 | { | |
2916 | struct ieee80211_hdr *hdr; | |
2917 | struct ieee80211_tx_data tx = { | |
2918 | .local = sdata->local, | |
2919 | .sdata = sdata, | |
2920 | }; | |
97ffe757 | 2921 | struct sta_info *sta; |
7528ec57 JB |
2922 | |
2923 | rcu_read_lock(); | |
2924 | ||
97ffe757 JB |
2925 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
2926 | kfree_skb(skb); | |
2927 | skb = ERR_PTR(-EINVAL); | |
2928 | goto out; | |
2929 | } | |
2930 | ||
2931 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
7528ec57 JB |
2932 | if (IS_ERR(skb)) |
2933 | goto out; | |
2934 | ||
2935 | hdr = (void *)skb->data; | |
2936 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
2937 | tx.skb = skb; | |
2938 | ||
2939 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
2940 | rcu_read_unlock(); | |
2941 | kfree_skb(skb); | |
2942 | return ERR_PTR(-EINVAL); | |
2943 | } | |
2944 | ||
2945 | out: | |
2946 | rcu_read_unlock(); | |
2947 | return skb; | |
2948 | } | |
2949 | ||
e2530083 JB |
2950 | /* |
2951 | * ieee80211_clear_tx_pending may not be called in a context where | |
2952 | * it is possible that it packets could come in again. | |
2953 | */ | |
e2ebc74d JB |
2954 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2955 | { | |
1f98ab7f | 2956 | struct sk_buff *skb; |
2de8e0d9 | 2957 | int i; |
e2ebc74d | 2958 | |
1f98ab7f FF |
2959 | for (i = 0; i < local->hw.queues; i++) { |
2960 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2961 | ieee80211_free_txskb(&local->hw, skb); | |
2962 | } | |
e2ebc74d JB |
2963 | } |
2964 | ||
7bb45683 JB |
2965 | /* |
2966 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2967 | * which in this case means re-queued -- take as an indication to stop sending | |
2968 | * more pending frames. | |
2969 | */ | |
cd8ffc80 JB |
2970 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2971 | struct sk_buff *skb) | |
2972 | { | |
2973 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2974 | struct ieee80211_sub_if_data *sdata; | |
2975 | struct sta_info *sta; | |
2976 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2977 | bool result; |
55de908a | 2978 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2979 | |
5061b0c2 | 2980 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2981 | |
2982 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2983 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2984 | if (unlikely(!chanctx_conf)) { | |
2985 | dev_kfree_skb(skb); | |
2986 | return true; | |
2987 | } | |
73c4e195 | 2988 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 2989 | result = ieee80211_tx(sdata, NULL, skb, true); |
cd8ffc80 | 2990 | } else { |
252b86c4 JB |
2991 | struct sk_buff_head skbs; |
2992 | ||
2993 | __skb_queue_head_init(&skbs); | |
2994 | __skb_queue_tail(&skbs, skb); | |
2995 | ||
cd8ffc80 | 2996 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2997 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2998 | |
74e4dbfd | 2999 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
3000 | } |
3001 | ||
cd8ffc80 JB |
3002 | return result; |
3003 | } | |
3004 | ||
e2530083 | 3005 | /* |
3b8d81e0 | 3006 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 3007 | */ |
e2ebc74d JB |
3008 | void ieee80211_tx_pending(unsigned long data) |
3009 | { | |
3010 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 3011 | unsigned long flags; |
cd8ffc80 | 3012 | int i; |
3b8d81e0 | 3013 | bool txok; |
e2ebc74d | 3014 | |
f0e72851 | 3015 | rcu_read_lock(); |
e2530083 | 3016 | |
3b8d81e0 | 3017 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
3018 | for (i = 0; i < local->hw.queues; i++) { |
3019 | /* | |
3020 | * If queue is stopped by something other than due to pending | |
3021 | * frames, or we have no pending frames, proceed to next queue. | |
3022 | */ | |
3b8d81e0 | 3023 | if (local->queue_stop_reasons[i] || |
2a577d98 | 3024 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 3025 | continue; |
e2530083 | 3026 | |
2a577d98 | 3027 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 3028 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 3029 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 3030 | |
a7bc376c | 3031 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 3032 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
3033 | continue; |
3034 | } | |
3035 | ||
3b8d81e0 JB |
3036 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
3037 | flags); | |
3038 | ||
3039 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
3040 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
3041 | flags); | |
3042 | if (!txok) | |
2a577d98 | 3043 | break; |
e2ebc74d | 3044 | } |
7236fe29 JB |
3045 | |
3046 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 3047 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 3048 | } |
3b8d81e0 | 3049 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 3050 | |
f0e72851 | 3051 | rcu_read_unlock(); |
e2ebc74d JB |
3052 | } |
3053 | ||
3054 | /* functions for drivers to get certain frames */ | |
3055 | ||
eac70c13 | 3056 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3057 | struct ps_data *ps, struct sk_buff *skb, |
3058 | bool is_template) | |
e2ebc74d JB |
3059 | { |
3060 | u8 *pos, *tim; | |
3061 | int aid0 = 0; | |
3062 | int i, have_bits = 0, n1, n2; | |
3063 | ||
3064 | /* Generate bitmap for TIM only if there are any STAs in power save | |
3065 | * mode. */ | |
d012a605 | 3066 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
3067 | /* in the hope that this is faster than |
3068 | * checking byte-for-byte */ | |
f359d3fe | 3069 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 3070 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
3071 | if (!is_template) { |
3072 | if (ps->dtim_count == 0) | |
3073 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
3074 | else | |
3075 | ps->dtim_count--; | |
3076 | } | |
e2ebc74d JB |
3077 | |
3078 | tim = pos = (u8 *) skb_put(skb, 6); | |
3079 | *pos++ = WLAN_EID_TIM; | |
3080 | *pos++ = 4; | |
d012a605 | 3081 | *pos++ = ps->dtim_count; |
8860020e | 3082 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 3083 | |
d012a605 | 3084 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
3085 | aid0 = 1; |
3086 | ||
d012a605 | 3087 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 3088 | |
e2ebc74d JB |
3089 | if (have_bits) { |
3090 | /* Find largest even number N1 so that bits numbered 1 through | |
3091 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
3092 | * (N2 + 1) x 8 through 2007 are 0. */ | |
3093 | n1 = 0; | |
3094 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 3095 | if (ps->tim[i]) { |
e2ebc74d JB |
3096 | n1 = i & 0xfe; |
3097 | break; | |
3098 | } | |
3099 | } | |
3100 | n2 = n1; | |
3101 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 3102 | if (ps->tim[i]) { |
e2ebc74d JB |
3103 | n2 = i; |
3104 | break; | |
3105 | } | |
3106 | } | |
3107 | ||
3108 | /* Bitmap control */ | |
3109 | *pos++ = n1 | aid0; | |
3110 | /* Part Virt Bitmap */ | |
5220da39 | 3111 | skb_put(skb, n2 - n1); |
d012a605 | 3112 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
3113 | |
3114 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
3115 | } else { |
3116 | *pos++ = aid0; /* Bitmap control */ | |
3117 | *pos++ = 0; /* Part Virt Bitmap */ | |
3118 | } | |
e2ebc74d JB |
3119 | } |
3120 | ||
eac70c13 | 3121 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3122 | struct ps_data *ps, struct sk_buff *skb, |
3123 | bool is_template) | |
eac70c13 MP |
3124 | { |
3125 | struct ieee80211_local *local = sdata->local; | |
3126 | ||
3127 | /* | |
3128 | * Not very nice, but we want to allow the driver to call | |
3129 | * ieee80211_beacon_get() as a response to the set_tim() | |
3130 | * callback. That, however, is already invoked under the | |
3131 | * sta_lock to guarantee consistent and race-free update | |
3132 | * of the tim bitmap in mac80211 and the driver. | |
3133 | */ | |
3134 | if (local->tim_in_locked_section) { | |
6ec8c332 | 3135 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 3136 | } else { |
1b91731d | 3137 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 3138 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 3139 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
3140 | } |
3141 | ||
3142 | return 0; | |
3143 | } | |
3144 | ||
1af586c9 AO |
3145 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
3146 | struct beacon_data *beacon) | |
73da7d5b SW |
3147 | { |
3148 | struct probe_resp *resp; | |
cd7760e6 SW |
3149 | u8 *beacon_data; |
3150 | size_t beacon_data_len; | |
0d06d9ba | 3151 | int i; |
af296bdb | 3152 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
3153 | |
3154 | switch (sdata->vif.type) { | |
3155 | case NL80211_IFTYPE_AP: | |
3156 | beacon_data = beacon->tail; | |
3157 | beacon_data_len = beacon->tail_len; | |
3158 | break; | |
3159 | case NL80211_IFTYPE_ADHOC: | |
3160 | beacon_data = beacon->head; | |
3161 | beacon_data_len = beacon->head_len; | |
3162 | break; | |
b8456a14 CYY |
3163 | case NL80211_IFTYPE_MESH_POINT: |
3164 | beacon_data = beacon->head; | |
3165 | beacon_data_len = beacon->head_len; | |
3166 | break; | |
cd7760e6 SW |
3167 | default: |
3168 | return; | |
3169 | } | |
73da7d5b | 3170 | |
af296bdb | 3171 | rcu_read_lock(); |
0d06d9ba | 3172 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 3173 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 3174 | |
af296bdb MK |
3175 | if (beacon->csa_counter_offsets[i]) { |
3176 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
3177 | beacon_data_len)) { | |
0d06d9ba AO |
3178 | rcu_read_unlock(); |
3179 | return; | |
3180 | } | |
af296bdb MK |
3181 | |
3182 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 3183 | } |
af296bdb MK |
3184 | |
3185 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
3186 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 3187 | } |
af296bdb | 3188 | rcu_read_unlock(); |
1af586c9 AO |
3189 | } |
3190 | ||
3191 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) | |
3192 | { | |
3193 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
3194 | struct beacon_data *beacon = NULL; |
3195 | u8 count = 0; | |
0d06d9ba | 3196 | |
af296bdb MK |
3197 | rcu_read_lock(); |
3198 | ||
3199 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
3200 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
3201 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
3202 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
3203 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
3204 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
3205 | ||
3206 | if (!beacon) | |
3207 | goto unlock; | |
3208 | ||
3209 | beacon->csa_current_counter--; | |
1af586c9 AO |
3210 | |
3211 | /* the counter should never reach 0 */ | |
af296bdb MK |
3212 | WARN_ON_ONCE(!beacon->csa_current_counter); |
3213 | count = beacon->csa_current_counter; | |
1af586c9 | 3214 | |
af296bdb MK |
3215 | unlock: |
3216 | rcu_read_unlock(); | |
3217 | return count; | |
73da7d5b | 3218 | } |
1af586c9 | 3219 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
3220 | |
3221 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
3222 | { | |
3223 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3224 | struct beacon_data *beacon = NULL; | |
3225 | u8 *beacon_data; | |
3226 | size_t beacon_data_len; | |
73da7d5b SW |
3227 | int ret = false; |
3228 | ||
3229 | if (!ieee80211_sdata_running(sdata)) | |
3230 | return false; | |
3231 | ||
3232 | rcu_read_lock(); | |
3233 | if (vif->type == NL80211_IFTYPE_AP) { | |
3234 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
3235 | ||
3236 | beacon = rcu_dereference(ap->beacon); | |
3237 | if (WARN_ON(!beacon || !beacon->tail)) | |
3238 | goto out; | |
3239 | beacon_data = beacon->tail; | |
3240 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
3241 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
3242 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
3243 | ||
3244 | beacon = rcu_dereference(ifibss->presp); | |
3245 | if (!beacon) | |
3246 | goto out; | |
3247 | ||
b8456a14 CYY |
3248 | beacon_data = beacon->head; |
3249 | beacon_data_len = beacon->head_len; | |
3250 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
3251 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
3252 | ||
3253 | beacon = rcu_dereference(ifmsh->beacon); | |
3254 | if (!beacon) | |
3255 | goto out; | |
3256 | ||
cd7760e6 SW |
3257 | beacon_data = beacon->head; |
3258 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
3259 | } else { |
3260 | WARN_ON(1); | |
3261 | goto out; | |
3262 | } | |
3263 | ||
10d78f27 MK |
3264 | if (!beacon->csa_counter_offsets[0]) |
3265 | goto out; | |
3266 | ||
af296bdb | 3267 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
3268 | goto out; |
3269 | ||
af296bdb | 3270 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
3271 | ret = true; |
3272 | out: | |
3273 | rcu_read_unlock(); | |
3274 | ||
3275 | return ret; | |
3276 | } | |
3277 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
3278 | ||
6ec8c332 AO |
3279 | static struct sk_buff * |
3280 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
3281 | struct ieee80211_vif *vif, | |
3282 | struct ieee80211_mutable_offsets *offs, | |
3283 | bool is_template) | |
e2ebc74d JB |
3284 | { |
3285 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 3286 | struct beacon_data *beacon = NULL; |
9d139c81 | 3287 | struct sk_buff *skb = NULL; |
e039fa4a | 3288 | struct ieee80211_tx_info *info; |
e2ebc74d | 3289 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 3290 | enum ieee80211_band band; |
e00cfce0 | 3291 | struct ieee80211_tx_rate_control txrc; |
55de908a | 3292 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 3293 | int csa_off_base = 0; |
8318d78a | 3294 | |
5dfdaf58 | 3295 | rcu_read_lock(); |
e2ebc74d | 3296 | |
32bfd35d | 3297 | sdata = vif_to_sdata(vif); |
55de908a | 3298 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 3299 | |
55de908a | 3300 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
3301 | goto out; |
3302 | ||
6ec8c332 AO |
3303 | if (offs) |
3304 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 3305 | |
05c914fe | 3306 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 3307 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 3308 | |
af296bdb | 3309 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 3310 | if (beacon) { |
10d78f27 | 3311 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
3312 | if (!is_template) |
3313 | ieee80211_csa_update_counter(vif); | |
3314 | ||
3315 | ieee80211_set_csa(sdata, beacon); | |
3316 | } | |
73da7d5b | 3317 | |
902acc78 JB |
3318 | /* |
3319 | * headroom, head length, | |
3320 | * tail length and maximum TIM length | |
3321 | */ | |
3322 | skb = dev_alloc_skb(local->tx_headroom + | |
3323 | beacon->head_len + | |
70dabeb7 FF |
3324 | beacon->tail_len + 256 + |
3325 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
3326 | if (!skb) |
3327 | goto out; | |
33b64eb2 | 3328 | |
902acc78 JB |
3329 | skb_reserve(skb, local->tx_headroom); |
3330 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
3331 | beacon->head_len); | |
33b64eb2 | 3332 | |
6ec8c332 AO |
3333 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
3334 | is_template); | |
33b64eb2 | 3335 | |
6ec8c332 AO |
3336 | if (offs) { |
3337 | offs->tim_offset = beacon->head_len; | |
3338 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
3339 | |
3340 | /* for AP the csa offsets are from tail */ | |
3341 | csa_off_base = skb->len; | |
6ec8c332 | 3342 | } |
eddcbb94 | 3343 | |
902acc78 JB |
3344 | if (beacon->tail) |
3345 | memcpy(skb_put(skb, beacon->tail_len), | |
3346 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
3347 | } else |
3348 | goto out; | |
05c914fe | 3349 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 3350 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 3351 | struct ieee80211_hdr *hdr; |
33b64eb2 | 3352 | |
af296bdb MK |
3353 | beacon = rcu_dereference(ifibss->presp); |
3354 | if (!beacon) | |
9d139c81 JB |
3355 | goto out; |
3356 | ||
10d78f27 | 3357 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
3358 | if (!is_template) |
3359 | ieee80211_csa_update_counter(vif); | |
cd7760e6 | 3360 | |
af296bdb | 3361 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 3362 | } |
cd7760e6 | 3363 | |
af296bdb | 3364 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 3365 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
3366 | if (!skb) |
3367 | goto out; | |
c3ffeab4 | 3368 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
3369 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
3370 | beacon->head_len); | |
9d139c81 JB |
3371 | |
3372 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
3373 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
3374 | IEEE80211_STYPE_BEACON); | |
902acc78 | 3375 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 3376 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 3377 | |
af296bdb MK |
3378 | beacon = rcu_dereference(ifmsh->beacon); |
3379 | if (!beacon) | |
ac1bd846 | 3380 | goto out; |
ac1bd846 | 3381 | |
10d78f27 | 3382 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
3383 | if (!is_template) |
3384 | /* TODO: For mesh csa_counter is in TU, so | |
3385 | * decrementing it by one isn't correct, but | |
3386 | * for now we leave it consistent with overall | |
3387 | * mac80211's behavior. | |
3388 | */ | |
3389 | ieee80211_csa_update_counter(vif); | |
3390 | ||
af296bdb | 3391 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 3392 | } |
b8456a14 | 3393 | |
dbf498fb | 3394 | if (ifmsh->sync_ops) |
af296bdb | 3395 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
dbf498fb | 3396 | |
3b69a9c5 | 3397 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 3398 | beacon->head_len + |
3f52b7e3 | 3399 | 256 + /* TIM IE */ |
af296bdb | 3400 | beacon->tail_len + |
70dabeb7 | 3401 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
3402 | if (!skb) |
3403 | goto out; | |
2b5e1967 | 3404 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
3405 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
3406 | beacon->head_len); | |
6ec8c332 AO |
3407 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
3408 | ||
3409 | if (offs) { | |
af296bdb MK |
3410 | offs->tim_offset = beacon->head_len; |
3411 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
3412 | } |
3413 | ||
af296bdb MK |
3414 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
3415 | beacon->tail_len); | |
9d139c81 JB |
3416 | } else { |
3417 | WARN_ON(1); | |
5dfdaf58 | 3418 | goto out; |
e2ebc74d JB |
3419 | } |
3420 | ||
1af586c9 | 3421 | /* CSA offsets */ |
af296bdb | 3422 | if (offs && beacon) { |
1af586c9 AO |
3423 | int i; |
3424 | ||
3425 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 3426 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
3427 | |
3428 | if (!csa_off) | |
3429 | continue; | |
3430 | ||
3431 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
3432 | } | |
3433 | } | |
3434 | ||
4bf88530 | 3435 | band = chanctx_conf->def.chan->band; |
55de908a | 3436 | |
e039fa4a JB |
3437 | info = IEEE80211_SKB_CB(skb); |
3438 | ||
3b8d81e0 | 3439 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 3440 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 3441 | info->band = band; |
e00cfce0 JM |
3442 | |
3443 | memset(&txrc, 0, sizeof(txrc)); | |
3444 | txrc.hw = hw; | |
e31583cd | 3445 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
3446 | txrc.bss_conf = &sdata->vif.bss_conf; |
3447 | txrc.skb = skb; | |
3448 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 3449 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 3450 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
3451 | txrc.max_rate_idx = -1; |
3452 | else | |
3453 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 3454 | txrc.bss = true; |
e00cfce0 | 3455 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
3456 | |
3457 | info->control.vif = vif; | |
f591fa5d | 3458 | |
a472e71b JL |
3459 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
3460 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
3461 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 3462 | out: |
5dfdaf58 | 3463 | rcu_read_unlock(); |
e2ebc74d | 3464 | return skb; |
6ec8c332 AO |
3465 | |
3466 | } | |
3467 | ||
3468 | struct sk_buff * | |
3469 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
3470 | struct ieee80211_vif *vif, | |
3471 | struct ieee80211_mutable_offsets *offs) | |
3472 | { | |
3473 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
3474 | } | |
3475 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
3476 | ||
3477 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
3478 | struct ieee80211_vif *vif, | |
3479 | u16 *tim_offset, u16 *tim_length) | |
3480 | { | |
3481 | struct ieee80211_mutable_offsets offs = {}; | |
3482 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
3483 | ||
3484 | if (tim_offset) | |
3485 | *tim_offset = offs.tim_offset; | |
3486 | ||
3487 | if (tim_length) | |
3488 | *tim_length = offs.tim_length; | |
3489 | ||
3490 | return bcn; | |
e2ebc74d | 3491 | } |
eddcbb94 | 3492 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 3493 | |
02945821 AN |
3494 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
3495 | struct ieee80211_vif *vif) | |
3496 | { | |
3497 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
3498 | struct sk_buff *skb = NULL; |
3499 | struct probe_resp *presp = NULL; | |
02945821 AN |
3500 | struct ieee80211_hdr *hdr; |
3501 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3502 | ||
3503 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
3504 | return NULL; | |
3505 | ||
3506 | rcu_read_lock(); | |
3507 | ||
3508 | ap = &sdata->u.ap; | |
3509 | presp = rcu_dereference(ap->probe_resp); | |
3510 | if (!presp) | |
3511 | goto out; | |
3512 | ||
aa7a0080 | 3513 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
3514 | if (!skb) |
3515 | goto out; | |
3516 | ||
aa7a0080 ES |
3517 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
3518 | ||
02945821 AN |
3519 | hdr = (struct ieee80211_hdr *) skb->data; |
3520 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
3521 | ||
3522 | out: | |
3523 | rcu_read_unlock(); | |
3524 | return skb; | |
3525 | } | |
3526 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
3527 | ||
7044cc56 KV |
3528 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
3529 | struct ieee80211_vif *vif) | |
3530 | { | |
3531 | struct ieee80211_sub_if_data *sdata; | |
3532 | struct ieee80211_if_managed *ifmgd; | |
3533 | struct ieee80211_pspoll *pspoll; | |
3534 | struct ieee80211_local *local; | |
3535 | struct sk_buff *skb; | |
3536 | ||
3537 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
3538 | return NULL; | |
3539 | ||
3540 | sdata = vif_to_sdata(vif); | |
3541 | ifmgd = &sdata->u.mgd; | |
3542 | local = sdata->local; | |
3543 | ||
3544 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 3545 | if (!skb) |
7044cc56 | 3546 | return NULL; |
d15b8459 | 3547 | |
7044cc56 KV |
3548 | skb_reserve(skb, local->hw.extra_tx_headroom); |
3549 | ||
3550 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
3551 | memset(pspoll, 0, sizeof(*pspoll)); | |
3552 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
3553 | IEEE80211_STYPE_PSPOLL); | |
3554 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
3555 | ||
3556 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
3557 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
3558 | ||
3559 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
3560 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
3561 | ||
3562 | return skb; | |
3563 | } | |
3564 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
3565 | ||
3566 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
3567 | struct ieee80211_vif *vif) | |
3568 | { | |
3569 | struct ieee80211_hdr_3addr *nullfunc; | |
3570 | struct ieee80211_sub_if_data *sdata; | |
3571 | struct ieee80211_if_managed *ifmgd; | |
3572 | struct ieee80211_local *local; | |
3573 | struct sk_buff *skb; | |
3574 | ||
3575 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
3576 | return NULL; | |
3577 | ||
3578 | sdata = vif_to_sdata(vif); | |
3579 | ifmgd = &sdata->u.mgd; | |
3580 | local = sdata->local; | |
3581 | ||
3582 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 3583 | if (!skb) |
7044cc56 | 3584 | return NULL; |
d15b8459 | 3585 | |
7044cc56 KV |
3586 | skb_reserve(skb, local->hw.extra_tx_headroom); |
3587 | ||
3588 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
3589 | sizeof(*nullfunc)); | |
3590 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
3591 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
3592 | IEEE80211_STYPE_NULLFUNC | | |
3593 | IEEE80211_FCTL_TODS); | |
3594 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
3595 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
3596 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
3597 | ||
3598 | return skb; | |
3599 | } | |
3600 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
3601 | ||
05e54ea6 | 3602 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 3603 | const u8 *src_addr, |
05e54ea6 | 3604 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 3605 | size_t tailroom) |
05e54ea6 | 3606 | { |
a344d677 | 3607 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
3608 | struct ieee80211_hdr_3addr *hdr; |
3609 | struct sk_buff *skb; | |
3610 | size_t ie_ssid_len; | |
3611 | u8 *pos; | |
3612 | ||
05e54ea6 KV |
3613 | ie_ssid_len = 2 + ssid_len; |
3614 | ||
3615 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 3616 | ie_ssid_len + tailroom); |
d15b8459 | 3617 | if (!skb) |
05e54ea6 | 3618 | return NULL; |
05e54ea6 KV |
3619 | |
3620 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3621 | ||
3622 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
3623 | memset(hdr, 0, sizeof(*hdr)); | |
3624 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
3625 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 3626 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 3627 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 3628 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
3629 | |
3630 | pos = skb_put(skb, ie_ssid_len); | |
3631 | *pos++ = WLAN_EID_SSID; | |
3632 | *pos++ = ssid_len; | |
88c868c4 | 3633 | if (ssid_len) |
05e54ea6 KV |
3634 | memcpy(pos, ssid, ssid_len); |
3635 | pos += ssid_len; | |
3636 | ||
05e54ea6 KV |
3637 | return skb; |
3638 | } | |
3639 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
3640 | ||
32bfd35d | 3641 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3642 | const void *frame, size_t frame_len, |
e039fa4a | 3643 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3644 | struct ieee80211_rts *rts) |
3645 | { | |
3646 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3647 | |
065e9605 HH |
3648 | rts->frame_control = |
3649 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
3650 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
3651 | frame_txctl); | |
e2ebc74d JB |
3652 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
3653 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
3654 | } | |
3655 | EXPORT_SYMBOL(ieee80211_rts_get); | |
3656 | ||
32bfd35d | 3657 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3658 | const void *frame, size_t frame_len, |
e039fa4a | 3659 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3660 | struct ieee80211_cts *cts) |
3661 | { | |
3662 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3663 | |
065e9605 HH |
3664 | cts->frame_control = |
3665 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
3666 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
3667 | frame_len, frame_txctl); | |
e2ebc74d JB |
3668 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
3669 | } | |
3670 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
3671 | ||
3672 | struct sk_buff * | |
32bfd35d | 3673 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 3674 | struct ieee80211_vif *vif) |
e2ebc74d JB |
3675 | { |
3676 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 3677 | struct sk_buff *skb = NULL; |
5cf121c3 | 3678 | struct ieee80211_tx_data tx; |
e2ebc74d | 3679 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 3680 | struct ps_data *ps; |
e039fa4a | 3681 | struct ieee80211_tx_info *info; |
55de908a | 3682 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 3683 | |
32bfd35d | 3684 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 3685 | |
5dfdaf58 | 3686 | rcu_read_lock(); |
55de908a | 3687 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 3688 | |
d012a605 MP |
3689 | if (!chanctx_conf) |
3690 | goto out; | |
3691 | ||
3692 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
3693 | struct beacon_data *beacon = | |
3694 | rcu_dereference(sdata->u.ap.beacon); | |
3695 | ||
3696 | if (!beacon || !beacon->head) | |
3697 | goto out; | |
3698 | ||
3699 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
3700 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
3701 | ps = &sdata->u.mesh.ps; | |
d012a605 | 3702 | } else { |
747cf5e9 | 3703 | goto out; |
d012a605 | 3704 | } |
5dfdaf58 | 3705 | |
d012a605 | 3706 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 3707 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 3708 | |
e2ebc74d | 3709 | while (1) { |
d012a605 | 3710 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 3711 | if (!skb) |
747cf5e9 | 3712 | goto out; |
e2ebc74d JB |
3713 | local->total_ps_buffered--; |
3714 | ||
d012a605 | 3715 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
3716 | struct ieee80211_hdr *hdr = |
3717 | (struct ieee80211_hdr *) skb->data; | |
3718 | /* more buffered multicast/broadcast frames ==> set | |
3719 | * MoreData flag in IEEE 802.11 header to inform PS | |
3720 | * STAs */ | |
3721 | hdr->frame_control |= | |
3722 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3723 | } | |
3724 | ||
112c44b2 | 3725 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 3726 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 3727 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d JB |
3728 | break; |
3729 | dev_kfree_skb_any(skb); | |
3730 | } | |
e039fa4a JB |
3731 | |
3732 | info = IEEE80211_SKB_CB(skb); | |
3733 | ||
5cf121c3 | 3734 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 3735 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 3736 | |
97b045d6 | 3737 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 3738 | skb = NULL; |
97b045d6 | 3739 | out: |
d0709a65 | 3740 | rcu_read_unlock(); |
e2ebc74d JB |
3741 | |
3742 | return skb; | |
3743 | } | |
3744 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 3745 | |
b6da911b LK |
3746 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
3747 | { | |
3748 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3749 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3750 | struct ieee80211_local *local = sdata->local; | |
3751 | int ret; | |
3752 | u32 queues; | |
3753 | ||
3754 | lockdep_assert_held(&local->sta_mtx); | |
3755 | ||
3756 | /* only some cases are supported right now */ | |
3757 | switch (sdata->vif.type) { | |
3758 | case NL80211_IFTYPE_STATION: | |
3759 | case NL80211_IFTYPE_AP: | |
3760 | case NL80211_IFTYPE_AP_VLAN: | |
3761 | break; | |
3762 | default: | |
3763 | WARN_ON(1); | |
3764 | return -EINVAL; | |
3765 | } | |
3766 | ||
3767 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
3768 | return -EINVAL; | |
3769 | ||
3770 | if (sta->reserved_tid == tid) { | |
3771 | ret = 0; | |
3772 | goto out; | |
3773 | } | |
3774 | ||
3775 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
3776 | sdata_err(sdata, "TID reservation already active\n"); | |
3777 | ret = -EALREADY; | |
3778 | goto out; | |
3779 | } | |
3780 | ||
3781 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
3782 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3783 | ||
3784 | synchronize_net(); | |
3785 | ||
3786 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
3787 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) { | |
3788 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3789 | __ieee80211_stop_tx_ba_session(sta, tid, | |
3790 | AGG_STOP_LOCAL_REQUEST); | |
3791 | } | |
3792 | ||
3793 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 3794 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
3795 | |
3796 | sta->reserved_tid = tid; | |
3797 | ||
3798 | ieee80211_wake_vif_queues(local, sdata, | |
3799 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3800 | ||
3801 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) | |
3802 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3803 | ||
3804 | ret = 0; | |
3805 | out: | |
3806 | return ret; | |
3807 | } | |
3808 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
3809 | ||
3810 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
3811 | { | |
3812 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3813 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3814 | ||
3815 | lockdep_assert_held(&sdata->local->sta_mtx); | |
3816 | ||
3817 | /* only some cases are supported right now */ | |
3818 | switch (sdata->vif.type) { | |
3819 | case NL80211_IFTYPE_STATION: | |
3820 | case NL80211_IFTYPE_AP: | |
3821 | case NL80211_IFTYPE_AP_VLAN: | |
3822 | break; | |
3823 | default: | |
3824 | WARN_ON(1); | |
3825 | return; | |
3826 | } | |
3827 | ||
3828 | if (tid != sta->reserved_tid) { | |
3829 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
3830 | return; | |
3831 | } | |
3832 | ||
3833 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
3834 | } | |
3835 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
3836 | ||
55de908a JB |
3837 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
3838 | struct sk_buff *skb, int tid, | |
3839 | enum ieee80211_band band) | |
3b8d81e0 | 3840 | { |
353d09c6 | 3841 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 3842 | |
3b8d81e0 JB |
3843 | skb_set_mac_header(skb, 0); |
3844 | skb_set_network_header(skb, 0); | |
3845 | skb_set_transport_header(skb, 0); | |
3846 | ||
3a25a8c8 | 3847 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 3848 | skb->priority = tid; |
cf0277e7 | 3849 | |
89afe614 JB |
3850 | skb->dev = sdata->dev; |
3851 | ||
3d34deb6 JB |
3852 | /* |
3853 | * The other path calling ieee80211_xmit is from the tasklet, | |
3854 | * and while we can handle concurrent transmissions locking | |
3855 | * requirements are that we do not come into tx with bhs on. | |
3856 | */ | |
3857 | local_bh_disable(); | |
73c4e195 | 3858 | IEEE80211_SKB_CB(skb)->band = band; |
7c10770f | 3859 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 3860 | local_bh_enable(); |
3b8d81e0 | 3861 | } |