Commit | Line | Data |
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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * | |
12 | * Transmit and frame generation functions. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/bitmap.h> | |
d4e46a3d | 20 | #include <linux/rcupdate.h> |
bc3b2d7f | 21 | #include <linux/export.h> |
ad38bfc9 | 22 | #include <linux/time.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 */ | |
0d528d85 | 62 | if (tx->rate.flags & IEEE80211_TX_RC_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, |
5c1b98a5 | 253 | IEEE80211_QUEUE_STOP_REASON_PS); |
db28569a | 254 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
255 | ieee80211_queue_work(&local->hw, |
256 | &local->dynamic_ps_disable_work); | |
257 | } | |
258 | ||
5db1c07c LC |
259 | /* Don't restart the timer if we're not disassociated */ |
260 | if (!ifmgd->associated) | |
261 | return TX_CONTINUE; | |
262 | ||
5c1b98a5 KV |
263 | mod_timer(&local->dynamic_ps_timer, jiffies + |
264 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
265 | ||
266 | return TX_CONTINUE; | |
267 | } | |
e2ebc74d | 268 | |
d9e8a70f | 269 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 270 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 271 | { |
358c8d9d | 272 | |
e039fa4a | 273 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 274 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 275 | bool assoc = false; |
e2ebc74d | 276 | |
e039fa4a | 277 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 278 | return TX_CONTINUE; |
58d4185e | 279 | |
b23b025f BG |
280 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
281 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
282 | !ieee80211_is_probe_req(hdr->frame_control) && |
283 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
284 | /* | |
285 | * When software scanning only nullfunc frames (to notify | |
286 | * the sleep state to the AP) and probe requests (for the | |
287 | * active scan) are allowed, all other frames should not be | |
288 | * sent and we should not get here, but if we do | |
289 | * nonetheless, drop them to avoid sending them | |
290 | * off-channel. See the link below and | |
291 | * ieee80211_start_scan() for more. | |
292 | * | |
293 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
294 | */ | |
9ae54c84 | 295 | return TX_DROP; |
e2ebc74d | 296 | |
1be7fe8d BJ |
297 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
298 | return TX_CONTINUE; | |
299 | ||
05c914fe | 300 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
301 | return TX_CONTINUE; |
302 | ||
5cf121c3 | 303 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 304 | return TX_CONTINUE; |
e2ebc74d | 305 | |
c2c98fde JB |
306 | if (tx->sta) |
307 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 308 | |
5cf121c3 | 309 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 310 | if (unlikely(!assoc && |
358c8d9d | 311 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 312 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
313 | sdata_info(tx->sdata, |
314 | "dropped data frame to not associated station %pM\n", | |
315 | hdr->addr1); | |
316 | #endif | |
e2ebc74d | 317 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 318 | return TX_DROP; |
e2ebc74d | 319 | } |
29623892 JB |
320 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
321 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 322 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
323 | /* |
324 | * No associated STAs - no need to send multicast | |
325 | * frames. | |
326 | */ | |
327 | return TX_DROP; | |
e2ebc74d JB |
328 | } |
329 | ||
9ae54c84 | 330 | return TX_CONTINUE; |
e2ebc74d JB |
331 | } |
332 | ||
e2ebc74d JB |
333 | /* This function is called whenever the AP is about to exceed the maximum limit |
334 | * of buffered frames for power saving STAs. This situation should not really | |
335 | * happen often during normal operation, so dropping the oldest buffered packet | |
336 | * from each queue should be OK to make some room for new frames. */ | |
337 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
338 | { | |
339 | int total = 0, purged = 0; | |
340 | struct sk_buff *skb; | |
341 | struct ieee80211_sub_if_data *sdata; | |
342 | struct sta_info *sta; | |
343 | ||
79010420 | 344 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
345 | struct ps_data *ps; |
346 | ||
347 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
348 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
349 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
350 | ps = &sdata->u.mesh.ps; | |
d012a605 | 351 | else |
e2ebc74d | 352 | continue; |
d012a605 MP |
353 | |
354 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
355 | if (skb) { |
356 | purged++; | |
357 | dev_kfree_skb(skb); | |
358 | } | |
d012a605 | 359 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 360 | } |
e2ebc74d | 361 | |
948d887d JB |
362 | /* |
363 | * Drop one frame from each station from the lowest-priority | |
364 | * AC that has frames at all. | |
365 | */ | |
d0709a65 | 366 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
367 | int ac; |
368 | ||
369 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
370 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
371 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
372 | if (skb) { | |
373 | purged++; | |
c3e7724b | 374 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
375 | break; |
376 | } | |
e2ebc74d | 377 | } |
e2ebc74d | 378 | } |
d0709a65 | 379 | |
e2ebc74d | 380 | local->total_ps_buffered = total; |
bdcbd8e0 | 381 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
382 | } |
383 | ||
9ae54c84 | 384 | static ieee80211_tx_result |
5cf121c3 | 385 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 386 | { |
e039fa4a | 387 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 388 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 389 | struct ps_data *ps; |
e039fa4a | 390 | |
7d54d0dd JB |
391 | /* |
392 | * broadcast/multicast frame | |
393 | * | |
3f52b7e3 | 394 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
395 | * the frame is buffered to be sent after DTIM beacon frame. |
396 | * This is done either by the hardware or us. | |
397 | */ | |
398 | ||
3f52b7e3 | 399 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
400 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
401 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
402 | if (!tx->sdata->bss) | |
403 | return TX_CONTINUE; | |
404 | ||
405 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
406 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
407 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 408 | } else { |
3e122be0 | 409 | return TX_CONTINUE; |
d012a605 MP |
410 | } |
411 | ||
3e122be0 JB |
412 | |
413 | /* no buffering for ordered frames */ | |
358c8d9d | 414 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 415 | return TX_CONTINUE; |
7d54d0dd | 416 | |
f4d57941 JB |
417 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
418 | info->hw_queue = tx->sdata->vif.cab_queue; | |
419 | ||
7d54d0dd | 420 | /* no stations in PS mode */ |
d012a605 | 421 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 422 | return TX_CONTINUE; |
7d54d0dd | 423 | |
62b517cb | 424 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 425 | |
62b517cb JB |
426 | /* device releases frame after DTIM beacon */ |
427 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 428 | return TX_CONTINUE; |
62b1208e | 429 | |
7d54d0dd | 430 | /* buffered in mac80211 */ |
62b1208e JB |
431 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
432 | purge_old_ps_buffers(tx->local); | |
433 | ||
d012a605 | 434 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
435 | ps_dbg(tx->sdata, |
436 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 437 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
438 | } else |
439 | tx->local->total_ps_buffered++; | |
e2ebc74d | 440 | |
d012a605 | 441 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 442 | |
62b1208e | 443 | return TX_QUEUED; |
e2ebc74d JB |
444 | } |
445 | ||
fb733336 JM |
446 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
447 | struct sk_buff *skb) | |
448 | { | |
449 | if (!ieee80211_is_mgmt(fc)) | |
450 | return 0; | |
451 | ||
c2c98fde | 452 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
453 | return 0; |
454 | ||
455 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
456 | skb->data)) | |
457 | return 0; | |
458 | ||
459 | return 1; | |
460 | } | |
461 | ||
9ae54c84 | 462 | static ieee80211_tx_result |
5cf121c3 | 463 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
464 | { |
465 | struct sta_info *sta = tx->sta; | |
e039fa4a | 466 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
3393a608 | 467 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 468 | |
02f2f1a9 | 469 | if (unlikely(!sta)) |
9ae54c84 | 470 | return TX_CONTINUE; |
e2ebc74d | 471 | |
c2c98fde JB |
472 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
473 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && | |
02f2f1a9 | 474 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
475 | int ac = skb_get_queue_mapping(tx->skb); |
476 | ||
bdcbd8e0 JB |
477 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
478 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
479 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
480 | purge_old_ps_buffers(tx->local); | |
948d887d JB |
481 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
482 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
483 | ps_dbg(tx->sdata, |
484 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
485 | sta->sta.addr, ac); | |
c3e7724b | 486 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
487 | } else |
488 | tx->local->total_ps_buffered++; | |
004c872e | 489 | |
e039fa4a | 490 | info->control.jiffies = jiffies; |
5061b0c2 | 491 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 492 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
948d887d | 493 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
3393a608 JO |
494 | |
495 | if (!timer_pending(&local->sta_cleanup)) | |
496 | mod_timer(&local->sta_cleanup, | |
497 | round_jiffies(jiffies + | |
498 | STA_INFO_CLEANUP_INTERVAL)); | |
499 | ||
c868cb35 JB |
500 | /* |
501 | * We queued up some frames, so the TIM bit might | |
502 | * need to be set, recalculate it. | |
503 | */ | |
504 | sta_info_recalc_tim(sta); | |
505 | ||
9ae54c84 | 506 | return TX_QUEUED; |
bdcbd8e0 JB |
507 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
508 | ps_dbg(tx->sdata, | |
509 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
510 | sta->sta.addr); | |
e2ebc74d | 511 | } |
e2ebc74d | 512 | |
9ae54c84 | 513 | return TX_CONTINUE; |
e2ebc74d JB |
514 | } |
515 | ||
d9e8a70f | 516 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 517 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 518 | { |
277d916f FF |
519 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
520 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
521 | ||
5cf121c3 | 522 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 523 | return TX_CONTINUE; |
e2ebc74d | 524 | |
277d916f FF |
525 | /* only deauth, disassoc and action are bufferable MMPDUs */ |
526 | if (ieee80211_is_mgmt(hdr->frame_control) && | |
527 | !ieee80211_is_deauth(hdr->frame_control) && | |
528 | !ieee80211_is_disassoc(hdr->frame_control) && | |
529 | !ieee80211_is_action(hdr->frame_control)) { | |
530 | if (tx->flags & IEEE80211_TX_UNICAST) | |
531 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
532 | return TX_CONTINUE; | |
533 | } | |
534 | ||
5cf121c3 | 535 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
536 | return ieee80211_tx_h_unicast_ps_buf(tx); |
537 | else | |
538 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
539 | } | |
540 | ||
a621fa4d JB |
541 | static ieee80211_tx_result debug_noinline |
542 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
543 | { | |
544 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
545 | ||
af61a165 JB |
546 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
547 | if (tx->sdata->control_port_no_encrypt) | |
548 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
549 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
550 | } | |
a621fa4d JB |
551 | |
552 | return TX_CONTINUE; | |
553 | } | |
554 | ||
d9e8a70f | 555 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 556 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 557 | { |
46e6de15 | 558 | struct ieee80211_key *key; |
e039fa4a | 559 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 560 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 561 | |
3b8d81e0 | 562 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 563 | tx->key = NULL; |
2475b1cc MS |
564 | else if (tx->sta && |
565 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 566 | tx->key = key; |
3cfcf6ac | 567 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
568 | is_multicast_ether_addr(hdr->addr1) && |
569 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
570 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
571 | tx->key = key; | |
f7e0104c JB |
572 | else if (is_multicast_ether_addr(hdr->addr1) && |
573 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
574 | tx->key = key; | |
575 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
576 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 577 | tx->key = key; |
46e6de15 JB |
578 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
579 | tx->key = NULL; | |
580 | else if (!tx->sdata->drop_unencrypted) | |
581 | tx->key = NULL; | |
582 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
583 | tx->key = NULL; | |
584 | else if (ieee80211_is_robust_mgmt_frame(hdr) && | |
585 | !(ieee80211_is_action(hdr->frame_control) && | |
586 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
587 | tx->key = NULL; | |
4922f71f NC |
588 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
589 | !ieee80211_is_robust_mgmt_frame(hdr)) | |
590 | tx->key = NULL; | |
46e6de15 | 591 | else { |
e2ebc74d | 592 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 593 | return TX_DROP; |
46e6de15 | 594 | } |
e2ebc74d JB |
595 | |
596 | if (tx->key) { | |
813d7669 JB |
597 | bool skip_hw = false; |
598 | ||
e2ebc74d | 599 | tx->key->tx_rx_count++; |
011bfcc4 | 600 | /* TODO: add threshold stuff again */ |
176e4f84 | 601 | |
97359d12 JB |
602 | switch (tx->key->conf.cipher) { |
603 | case WLAN_CIPHER_SUITE_WEP40: | |
604 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 605 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 606 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
607 | tx->key = NULL; |
608 | break; | |
97359d12 | 609 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
610 | if (!ieee80211_is_data_present(hdr->frame_control) && |
611 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
612 | tx->skb)) | |
613 | tx->key = NULL; | |
3b43a187 KV |
614 | else |
615 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 616 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 617 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 618 | break; |
97359d12 | 619 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
620 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
621 | tx->key = NULL; | |
622 | break; | |
176e4f84 | 623 | } |
813d7669 | 624 | |
e54faf29 JB |
625 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
626 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
627 | return TX_DROP; |
628 | ||
f12553eb | 629 | if (!skip_hw && tx->key && |
382b1655 | 630 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 631 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
632 | } |
633 | ||
9ae54c84 | 634 | return TX_CONTINUE; |
e2ebc74d JB |
635 | } |
636 | ||
d9e8a70f | 637 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 638 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 639 | { |
e039fa4a | 640 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
641 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
642 | struct ieee80211_supported_band *sband; | |
a2c40249 | 643 | u32 len; |
e6a9854b | 644 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 645 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 646 | bool assoc = false; |
8318d78a | 647 | |
e6a9854b | 648 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 649 | |
2d56577b | 650 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 651 | |
a2c40249 | 652 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 653 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
654 | |
655 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 656 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
657 | txrc.sband = sband; |
658 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
659 | txrc.skb = tx->skb; | |
660 | txrc.reported_rate.idx = -1; | |
2d56577b | 661 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
662 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
663 | txrc.max_rate_idx = -1; | |
664 | else | |
665 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
666 | |
667 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
668 | txrc.rate_idx_mcs_mask = | |
669 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
670 | ||
8f0729b1 | 671 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 672 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 673 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
674 | |
675 | /* set up RTS protection if desired */ | |
b9a5f8ca | 676 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 677 | txrc.rts = true; |
e2ebc74d | 678 | } |
e2ebc74d | 679 | |
0d528d85 | 680 | info->control.use_rts = txrc.rts; |
991fec09 FF |
681 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
682 | ||
e6a9854b JB |
683 | /* |
684 | * Use short preamble if the BSS can handle it, but not for | |
685 | * management frames unless we know the receiver can handle | |
686 | * that -- the management frame might be to a station that | |
687 | * just wants a probe response. | |
688 | */ | |
689 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
690 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 691 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
692 | txrc.short_preamble = true; |
693 | ||
694 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 695 | |
c2c98fde JB |
696 | if (tx->sta) |
697 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
698 | |
699 | /* | |
700 | * Lets not bother rate control if we're associated and cannot | |
701 | * talk to the sta. This should not happen. | |
702 | */ | |
c2c98fde | 703 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
704 | !rate_usable_index_exists(sband, &tx->sta->sta), |
705 | "%s: Dropped data frame as no usable bitrate found while " | |
706 | "scanning and associated. Target station: " | |
707 | "%pM on %d GHz band\n", | |
47846c9b | 708 | tx->sdata->name, hdr->addr1, |
2d56577b | 709 | info->band ? 5 : 2)) |
b770b43e | 710 | return TX_DROP; |
2e92e6f2 | 711 | |
b770b43e LR |
712 | /* |
713 | * If we're associated with the sta at this point we know we can at | |
714 | * least send the frame at the lowest bit rate. | |
715 | */ | |
e6a9854b JB |
716 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
717 | ||
0d528d85 FF |
718 | if (tx->sta && !info->control.skip_table) |
719 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
720 | ||
721 | if (unlikely(info->control.rates[0].idx < 0)) { | |
722 | if (ratetbl) { | |
723 | struct ieee80211_tx_rate rate = { | |
724 | .idx = ratetbl->rate[0].idx, | |
725 | .flags = ratetbl->rate[0].flags, | |
726 | .count = ratetbl->rate[0].count | |
727 | }; | |
728 | ||
729 | if (ratetbl->rate[0].idx < 0) | |
730 | return TX_DROP; | |
731 | ||
732 | tx->rate = rate; | |
733 | } else { | |
734 | return TX_DROP; | |
735 | } | |
736 | } else { | |
737 | tx->rate = info->control.rates[0]; | |
738 | } | |
e6a9854b | 739 | |
c1ce5a74 | 740 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 741 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
742 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
743 | tx->sta->last_tx_rate = txrc.reported_rate; | |
744 | } else if (tx->sta) | |
e6a9854b | 745 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 746 | |
0d528d85 FF |
747 | if (ratetbl) |
748 | return TX_CONTINUE; | |
749 | ||
e6a9854b JB |
750 | if (unlikely(!info->control.rates[0].count)) |
751 | info->control.rates[0].count = 1; | |
e2ebc74d | 752 | |
9955151d GS |
753 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
754 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
755 | info->control.rates[0].count = 1; | |
756 | ||
e6a9854b JB |
757 | return TX_CONTINUE; |
758 | } | |
759 | ||
f591fa5d JB |
760 | static ieee80211_tx_result debug_noinline |
761 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
762 | { | |
763 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
764 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
765 | u16 *seq; | |
766 | u8 *qc; | |
767 | int tid; | |
768 | ||
25d834e1 JB |
769 | /* |
770 | * Packet injection may want to control the sequence | |
771 | * number, if we have no matching interface then we | |
772 | * neither assign one ourselves nor ask the driver to. | |
773 | */ | |
5061b0c2 | 774 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
775 | return TX_CONTINUE; |
776 | ||
f591fa5d JB |
777 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
778 | return TX_CONTINUE; | |
779 | ||
780 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
781 | return TX_CONTINUE; | |
782 | ||
49a59543 JB |
783 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
784 | return TX_CONTINUE; | |
785 | ||
94778280 JB |
786 | /* |
787 | * Anything but QoS data that has a sequence number field | |
788 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
789 | * counter. QoS data frames with a multicast destination |
790 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 791 | */ |
c4c205f3 BC |
792 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
793 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 794 | /* driver should assign sequence number */ |
f591fa5d | 795 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
796 | /* for pure STA mode without beacons, we can do it */ |
797 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
798 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
799 | return TX_CONTINUE; |
800 | } | |
801 | ||
802 | /* | |
803 | * This should be true for injected/management frames only, for | |
804 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
805 | * above since they are not QoS-data frames. | |
806 | */ | |
807 | if (!tx->sta) | |
808 | return TX_CONTINUE; | |
809 | ||
810 | /* include per-STA, per-TID sequence counter */ | |
811 | ||
812 | qc = ieee80211_get_qos_ctl(hdr); | |
813 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
814 | seq = &tx->sta->tid_seq[tid]; | |
815 | ||
816 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
817 | ||
818 | /* Increase the sequence number. */ | |
819 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
820 | ||
821 | return TX_CONTINUE; | |
822 | } | |
823 | ||
252b86c4 | 824 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
825 | struct sk_buff *skb, int hdrlen, |
826 | int frag_threshold) | |
827 | { | |
252b86c4 | 828 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 829 | struct ieee80211_tx_info *info; |
252b86c4 | 830 | struct sk_buff *tmp; |
2de8e0d9 JB |
831 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
832 | int pos = hdrlen + per_fragm; | |
833 | int rem = skb->len - hdrlen - per_fragm; | |
834 | ||
835 | if (WARN_ON(rem < 0)) | |
836 | return -EINVAL; | |
837 | ||
252b86c4 JB |
838 | /* first fragment was already added to queue by caller */ |
839 | ||
2de8e0d9 JB |
840 | while (rem) { |
841 | int fraglen = per_fragm; | |
842 | ||
843 | if (fraglen > rem) | |
844 | fraglen = rem; | |
845 | rem -= fraglen; | |
846 | tmp = dev_alloc_skb(local->tx_headroom + | |
847 | frag_threshold + | |
2475b1cc | 848 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
849 | IEEE80211_ENCRYPT_TAILROOM); |
850 | if (!tmp) | |
851 | return -ENOMEM; | |
252b86c4 JB |
852 | |
853 | __skb_queue_tail(&tx->skbs, tmp); | |
854 | ||
2475b1cc MS |
855 | skb_reserve(tmp, |
856 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
857 | ||
2de8e0d9 JB |
858 | /* copy control information */ |
859 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
860 | |
861 | info = IEEE80211_SKB_CB(tmp); | |
862 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
863 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
864 | ||
865 | if (rem) | |
866 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
867 | ||
2de8e0d9 JB |
868 | skb_copy_queue_mapping(tmp, skb); |
869 | tmp->priority = skb->priority; | |
2de8e0d9 | 870 | tmp->dev = skb->dev; |
2de8e0d9 JB |
871 | |
872 | /* copy header and data */ | |
873 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
874 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
875 | ||
876 | pos += fraglen; | |
877 | } | |
878 | ||
252b86c4 | 879 | /* adjust first fragment's length */ |
2de8e0d9 JB |
880 | skb->len = hdrlen + per_fragm; |
881 | return 0; | |
882 | } | |
883 | ||
d9e8a70f | 884 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
885 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
886 | { | |
2de8e0d9 JB |
887 | struct sk_buff *skb = tx->skb; |
888 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
889 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 890 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
891 | int hdrlen; |
892 | int fragnum; | |
e2454948 | 893 | |
252b86c4 JB |
894 | /* no matter what happens, tx->skb moves to tx->skbs */ |
895 | __skb_queue_tail(&tx->skbs, skb); | |
896 | tx->skb = NULL; | |
897 | ||
a26eb27a JB |
898 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
899 | return TX_CONTINUE; | |
900 | ||
901 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
902 | return TX_CONTINUE; |
903 | ||
eefce91a JB |
904 | /* |
905 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 906 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 907 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 908 | */ |
8b30b1fe | 909 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
910 | return TX_DROP; |
911 | ||
065e9605 | 912 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 913 | |
a26eb27a | 914 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 915 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 916 | return TX_DROP; |
e6a9854b | 917 | |
2de8e0d9 JB |
918 | /* |
919 | * Now fragment the frame. This will allocate all the fragments and | |
920 | * chain them (using skb as the first fragment) to skb->next. | |
921 | * During transmission, we will remove the successfully transmitted | |
922 | * fragments from this list. When the low-level driver rejects one | |
923 | * of the fragments then we will simply pretend to accept the skb | |
924 | * but store it away as pending. | |
925 | */ | |
252b86c4 | 926 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 927 | return TX_DROP; |
e6a9854b | 928 | |
2de8e0d9 JB |
929 | /* update duration/seq/flags of fragments */ |
930 | fragnum = 0; | |
252b86c4 JB |
931 | |
932 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 933 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 934 | |
2de8e0d9 JB |
935 | hdr = (void *)skb->data; |
936 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 937 | |
252b86c4 | 938 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 939 | hdr->frame_control |= morefrags; |
e6a9854b JB |
940 | /* |
941 | * No multi-rate retries for fragmented frames, that | |
942 | * would completely throw off the NAV at other STAs. | |
943 | */ | |
944 | info->control.rates[1].idx = -1; | |
945 | info->control.rates[2].idx = -1; | |
946 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 947 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 948 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
949 | } else { |
950 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 951 | } |
2de8e0d9 JB |
952 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
953 | fragnum++; | |
252b86c4 | 954 | } |
e2ebc74d | 955 | |
9ae54c84 | 956 | return TX_CONTINUE; |
e2ebc74d JB |
957 | } |
958 | ||
feff1f2f JB |
959 | static ieee80211_tx_result debug_noinline |
960 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
961 | { | |
252b86c4 | 962 | struct sk_buff *skb; |
560d2682 | 963 | int ac = -1; |
feff1f2f JB |
964 | |
965 | if (!tx->sta) | |
966 | return TX_CONTINUE; | |
967 | ||
252b86c4 | 968 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 969 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 970 | tx->sta->tx_fragments++; |
560d2682 | 971 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 972 | } |
560d2682 JB |
973 | if (ac >= 0) |
974 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
975 | |
976 | return TX_CONTINUE; | |
977 | } | |
978 | ||
d9e8a70f | 979 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
980 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
981 | { | |
982 | if (!tx->key) | |
983 | return TX_CONTINUE; | |
984 | ||
97359d12 JB |
985 | switch (tx->key->conf.cipher) { |
986 | case WLAN_CIPHER_SUITE_WEP40: | |
987 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 988 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 989 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 990 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 991 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 992 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 993 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 994 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 995 | default: |
d32a1028 | 996 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
997 | } |
998 | ||
e2454948 JB |
999 | return TX_DROP; |
1000 | } | |
1001 | ||
d9e8a70f | 1002 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1003 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1004 | { | |
252b86c4 | 1005 | struct sk_buff *skb; |
2de8e0d9 JB |
1006 | struct ieee80211_hdr *hdr; |
1007 | int next_len; | |
1008 | bool group_addr; | |
03f93c3d | 1009 | |
252b86c4 | 1010 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1011 | hdr = (void *) skb->data; |
7e0aae47 JM |
1012 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1013 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1014 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1015 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1016 | next_len = next->len; | |
1017 | } else | |
1018 | next_len = 0; | |
2de8e0d9 | 1019 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1020 | |
2de8e0d9 | 1021 | hdr->duration_id = |
252b86c4 JB |
1022 | ieee80211_duration(tx, skb, group_addr, next_len); |
1023 | } | |
03f93c3d JB |
1024 | |
1025 | return TX_CONTINUE; | |
1026 | } | |
1027 | ||
e2ebc74d JB |
1028 | /* actual transmit path */ |
1029 | ||
a622ab72 JB |
1030 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1031 | struct sk_buff *skb, | |
1032 | struct ieee80211_tx_info *info, | |
1033 | struct tid_ampdu_tx *tid_tx, | |
1034 | int tid) | |
1035 | { | |
1036 | bool queued = false; | |
285fa695 | 1037 | bool reset_agg_timer = false; |
aa454580 | 1038 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1039 | |
1040 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1041 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1042 | reset_agg_timer = true; |
0ab33703 JB |
1043 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1044 | /* | |
1045 | * nothing -- this aggregation session is being started | |
1046 | * but that might still fail with the driver | |
1047 | */ | |
a622ab72 JB |
1048 | } else { |
1049 | spin_lock(&tx->sta->lock); | |
1050 | /* | |
1051 | * Need to re-check now, because we may get here | |
1052 | * | |
1053 | * 1) in the window during which the setup is actually | |
1054 | * already done, but not marked yet because not all | |
1055 | * packets are spliced over to the driver pending | |
1056 | * queue yet -- if this happened we acquire the lock | |
1057 | * either before or after the splice happens, but | |
1058 | * need to recheck which of these cases happened. | |
1059 | * | |
1060 | * 2) during session teardown, if the OPERATIONAL bit | |
1061 | * was cleared due to the teardown but the pointer | |
1062 | * hasn't been assigned NULL yet (or we loaded it | |
1063 | * before it was assigned) -- in this case it may | |
1064 | * now be NULL which means we should just let the | |
1065 | * packet pass through because splicing the frames | |
1066 | * back is already done. | |
1067 | */ | |
40b275b6 | 1068 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1069 | |
1070 | if (!tid_tx) { | |
1071 | /* do nothing, let packet pass through */ | |
1072 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1073 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1074 | reset_agg_timer = true; |
a622ab72 JB |
1075 | } else { |
1076 | queued = true; | |
1077 | info->control.vif = &tx->sdata->vif; | |
1078 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1079 | __skb_queue_tail(&tid_tx->pending, skb); | |
aa454580 HS |
1080 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1081 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1082 | } |
1083 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1084 | |
1085 | if (purge_skb) | |
c3e7724b | 1086 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1087 | } |
1088 | ||
285fa695 NM |
1089 | /* reset session timer */ |
1090 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1091 | tid_tx->last_tx = jiffies; |
285fa695 | 1092 | |
a622ab72 JB |
1093 | return queued; |
1094 | } | |
1095 | ||
58d4185e JB |
1096 | /* |
1097 | * initialises @tx | |
1098 | */ | |
9ae54c84 | 1099 | static ieee80211_tx_result |
3b8d81e0 JB |
1100 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1101 | struct ieee80211_tx_data *tx, | |
1102 | struct sk_buff *skb) | |
e2ebc74d | 1103 | { |
3b8d81e0 | 1104 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1105 | struct ieee80211_hdr *hdr; |
e039fa4a | 1106 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1107 | int tid; |
a622ab72 | 1108 | u8 *qc; |
e2ebc74d JB |
1109 | |
1110 | memset(tx, 0, sizeof(*tx)); | |
1111 | tx->skb = skb; | |
e2ebc74d | 1112 | tx->local = local; |
3b8d81e0 | 1113 | tx->sdata = sdata; |
252b86c4 | 1114 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1115 | |
cd8ffc80 JB |
1116 | /* |
1117 | * If this flag is set to true anywhere, and we get here, | |
1118 | * we are doing the needed processing, so remove the flag | |
1119 | * now. | |
1120 | */ | |
1121 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1122 | ||
58d4185e JB |
1123 | hdr = (struct ieee80211_hdr *) skb->data; |
1124 | ||
3f0e0b22 | 1125 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1126 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1127 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1128 | return TX_DROP; | |
03bb7f42 FF |
1129 | } else if (info->flags & (IEEE80211_TX_CTL_INJECTED | |
1130 | IEEE80211_TX_INTFL_NL80211_FRAME_TX) || | |
66f2c99a | 1131 | tx->sdata->control_port_protocol == tx->skb->protocol) { |
b4d57adb | 1132 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1133 | } |
f14543ee | 1134 | if (!tx->sta) |
abe60632 | 1135 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1136 | |
cd8ffc80 | 1137 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1138 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1139 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1140 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1141 | struct tid_ampdu_tx *tid_tx; |
1142 | ||
8b30b1fe S |
1143 | qc = ieee80211_get_qos_ctl(hdr); |
1144 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1145 | ||
a622ab72 JB |
1146 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1147 | if (tid_tx) { | |
1148 | bool queued; | |
cd8ffc80 | 1149 | |
a622ab72 JB |
1150 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1151 | tid_tx, tid); | |
1152 | ||
1153 | if (unlikely(queued)) | |
1154 | return TX_QUEUED; | |
1155 | } | |
8b30b1fe S |
1156 | } |
1157 | ||
badffb72 | 1158 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1159 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1160 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1161 | } else |
5cf121c3 | 1162 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1163 | |
a26eb27a JB |
1164 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1165 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1166 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1167 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1168 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1169 | } |
1170 | ||
e2ebc74d | 1171 | if (!tx->sta) |
e039fa4a | 1172 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1173 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1174 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1175 | |
e039fa4a | 1176 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1177 | |
9ae54c84 | 1178 | return TX_CONTINUE; |
e2ebc74d JB |
1179 | } |
1180 | ||
11127e91 JB |
1181 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1182 | struct ieee80211_vif *vif, | |
1183 | struct ieee80211_sta *sta, | |
1184 | struct sk_buff_head *skbs, | |
1185 | bool txpending) | |
e2ebc74d | 1186 | { |
36323f81 | 1187 | struct ieee80211_tx_control control; |
252b86c4 | 1188 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1189 | unsigned long flags; |
e2ebc74d | 1190 | |
252b86c4 | 1191 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1192 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1193 | int q = info->hw_queue; | |
1194 | ||
1195 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1196 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1197 | __skb_unlink(skb, skbs); | |
c3e7724b | 1198 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1199 | continue; |
1200 | } | |
1201 | #endif | |
3b8d81e0 JB |
1202 | |
1203 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1204 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1205 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1206 | if (unlikely(info->flags & |
a7679ed5 SF |
1207 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1208 | if (local->queue_stop_reasons[q] & | |
1209 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1210 | /* | |
1211 | * Drop off-channel frames if queues | |
1212 | * are stopped for any reason other | |
1213 | * than off-channel operation. Never | |
1214 | * queue them. | |
1215 | */ | |
1216 | spin_unlock_irqrestore( | |
1217 | &local->queue_stop_reason_lock, | |
1218 | flags); | |
1219 | ieee80211_purge_tx_queue(&local->hw, | |
1220 | skbs); | |
1221 | return true; | |
1222 | } | |
1223 | } else { | |
1224 | ||
6c17b77b | 1225 | /* |
a7679ed5 SF |
1226 | * Since queue is stopped, queue up frames for |
1227 | * later transmission from the tx-pending | |
1228 | * tasklet when the queue is woken again. | |
6c17b77b | 1229 | */ |
a7679ed5 SF |
1230 | if (txpending) |
1231 | skb_queue_splice_init(skbs, | |
1232 | &local->pending[q]); | |
1233 | else | |
1234 | skb_queue_splice_tail_init(skbs, | |
1235 | &local->pending[q]); | |
1236 | ||
1237 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1238 | flags); | |
1239 | return false; | |
6c17b77b | 1240 | } |
7bb45683 | 1241 | } |
3b8d81e0 | 1242 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1243 | |
11127e91 | 1244 | info->control.vif = vif; |
36323f81 | 1245 | control.sta = sta; |
f0e72851 | 1246 | |
11127e91 | 1247 | __skb_unlink(skb, skbs); |
36323f81 | 1248 | drv_tx(local, &control, skb); |
11127e91 | 1249 | } |
5061b0c2 | 1250 | |
11127e91 JB |
1251 | return true; |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1256 | */ | |
1257 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1258 | struct sk_buff_head *skbs, int led_len, | |
1259 | struct sta_info *sta, bool txpending) | |
1260 | { | |
1261 | struct ieee80211_tx_info *info; | |
1262 | struct ieee80211_sub_if_data *sdata; | |
1263 | struct ieee80211_vif *vif; | |
1264 | struct ieee80211_sta *pubsta; | |
1265 | struct sk_buff *skb; | |
1266 | bool result = true; | |
1267 | __le16 fc; | |
5061b0c2 | 1268 | |
11127e91 JB |
1269 | if (WARN_ON(skb_queue_empty(skbs))) |
1270 | return true; | |
ec25acc4 | 1271 | |
11127e91 JB |
1272 | skb = skb_peek(skbs); |
1273 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1274 | info = IEEE80211_SKB_CB(skb); | |
1275 | sdata = vif_to_sdata(info->control.vif); | |
1276 | if (sta && !sta->uploaded) | |
1277 | sta = NULL; | |
1278 | ||
1279 | if (sta) | |
1280 | pubsta = &sta->sta; | |
1281 | else | |
1282 | pubsta = NULL; | |
1283 | ||
1284 | switch (sdata->vif.type) { | |
1285 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1286 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1287 | vif = &sdata->vif; | |
1288 | break; | |
1289 | } | |
4b6f1dd6 | 1290 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1291 | if (sdata) { |
4b6f1dd6 | 1292 | vif = &sdata->vif; |
3a25a8c8 JB |
1293 | info->hw_queue = |
1294 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1295 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1296 | dev_kfree_skb(skb); | |
1297 | return true; | |
1298 | } else | |
4b6f1dd6 | 1299 | vif = NULL; |
11127e91 JB |
1300 | break; |
1301 | case NL80211_IFTYPE_AP_VLAN: | |
1302 | sdata = container_of(sdata->bss, | |
1303 | struct ieee80211_sub_if_data, u.ap); | |
1304 | /* fall through */ | |
1305 | default: | |
1306 | vif = &sdata->vif; | |
1307 | break; | |
e2ebc74d | 1308 | } |
2de8e0d9 | 1309 | |
cb831b53 JB |
1310 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1311 | txpending); | |
11127e91 | 1312 | |
74e4dbfd | 1313 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1314 | |
4db4e0a1 | 1315 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1316 | |
11127e91 | 1317 | return result; |
e2ebc74d JB |
1318 | } |
1319 | ||
97b045d6 JB |
1320 | /* |
1321 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1322 | * frame was dropped or queued. | |
1323 | */ | |
1324 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1325 | { | |
252b86c4 | 1326 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1327 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1328 | |
9aa4aee3 JB |
1329 | #define CALL_TXH(txh) \ |
1330 | do { \ | |
1331 | res = txh(tx); \ | |
1332 | if (res != TX_CONTINUE) \ | |
1333 | goto txh_done; \ | |
1334 | } while (0) | |
1335 | ||
5c1b98a5 | 1336 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1337 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1338 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1339 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1340 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1341 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1342 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1343 | |
aa5b5492 JB |
1344 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1345 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1346 | tx->skb = NULL; | |
c6fcf6bc | 1347 | goto txh_done; |
aa5b5492 | 1348 | } |
c6fcf6bc JB |
1349 | |
1350 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1351 | CALL_TXH(ieee80211_tx_h_sequence); |
1352 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1353 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1354 | CALL_TXH(ieee80211_tx_h_stats); |
1355 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1356 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1357 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1358 | #undef CALL_TXH |
97b045d6 | 1359 | |
d9e8a70f | 1360 | txh_done: |
97b045d6 | 1361 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1362 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1363 | if (tx->skb) |
c3e7724b | 1364 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1365 | else |
1f98ab7f | 1366 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1367 | return -1; |
1368 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1369 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1370 | return -1; |
1371 | } | |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
06be6b14 FF |
1376 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1377 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1378 | int band, struct ieee80211_sta **sta) | |
1379 | { | |
1380 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1381 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1382 | struct ieee80211_tx_data tx; | |
1383 | ||
1384 | if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP) | |
1385 | return false; | |
1386 | ||
1387 | info->band = band; | |
1388 | info->control.vif = vif; | |
1389 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1390 | ||
1391 | if (invoke_tx_handlers(&tx)) | |
1392 | return false; | |
1393 | ||
1394 | if (sta) { | |
1395 | if (tx.sta) | |
1396 | *sta = &tx.sta->sta; | |
1397 | else | |
1398 | *sta = NULL; | |
1399 | } | |
1400 | ||
1401 | return true; | |
1402 | } | |
1403 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1404 | ||
7bb45683 JB |
1405 | /* |
1406 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1407 | */ | |
1408 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
55de908a JB |
1409 | struct sk_buff *skb, bool txpending, |
1410 | enum ieee80211_band band) | |
e2ebc74d | 1411 | { |
3b8d81e0 | 1412 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1413 | struct ieee80211_tx_data tx; |
97b045d6 | 1414 | ieee80211_tx_result res_prepare; |
e039fa4a | 1415 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1416 | bool result = true; |
74e4dbfd | 1417 | int led_len; |
e2ebc74d | 1418 | |
e2ebc74d JB |
1419 | if (unlikely(skb->len < 10)) { |
1420 | dev_kfree_skb(skb); | |
7bb45683 | 1421 | return true; |
e2ebc74d JB |
1422 | } |
1423 | ||
58d4185e | 1424 | /* initialises tx */ |
74e4dbfd | 1425 | led_len = skb->len; |
3b8d81e0 | 1426 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1427 | |
cd8ffc80 | 1428 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1429 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1430 | return true; |
cd8ffc80 | 1431 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1432 | return true; |
e2ebc74d JB |
1433 | } |
1434 | ||
55de908a | 1435 | info->band = band; |
e2ebc74d | 1436 | |
3a25a8c8 JB |
1437 | /* set up hw_queue value early */ |
1438 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1439 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1440 | info->hw_queue = | |
1441 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1442 | ||
7bb45683 | 1443 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1444 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1445 | tx.sta, txpending); | |
55de908a | 1446 | |
7bb45683 | 1447 | return result; |
e2ebc74d JB |
1448 | } |
1449 | ||
1450 | /* device xmit handlers */ | |
1451 | ||
3bff1865 | 1452 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1453 | struct sk_buff *skb, |
1454 | int head_need, bool may_encrypt) | |
1455 | { | |
3bff1865 | 1456 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1457 | int tail_need = 0; |
1458 | ||
3bff1865 | 1459 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1460 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1461 | tail_need -= skb_tailroom(skb); | |
1462 | tail_need = max_t(int, tail_need, 0); | |
1463 | } | |
1464 | ||
fc7c976d | 1465 | if (skb_cloned(skb)) |
23c0752a | 1466 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1467 | else if (head_need || tail_need) |
23c0752a | 1468 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1469 | else |
1470 | return 0; | |
23c0752a JB |
1471 | |
1472 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1473 | wiphy_debug(local->hw.wiphy, |
1474 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1475 | return -ENOMEM; |
1476 | } | |
1477 | ||
23c0752a JB |
1478 | return 0; |
1479 | } | |
1480 | ||
55de908a JB |
1481 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
1482 | enum ieee80211_band band) | |
e2ebc74d | 1483 | { |
3b8d81e0 | 1484 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1485 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1486 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1487 | int headroom; |
23c0752a | 1488 | bool may_encrypt; |
e2ebc74d | 1489 | |
3b8d81e0 | 1490 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1491 | |
3b8d81e0 | 1492 | headroom = local->tx_headroom; |
23c0752a | 1493 | if (may_encrypt) |
2475b1cc | 1494 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1495 | headroom -= skb_headroom(skb); |
1496 | headroom = max_t(int, 0, headroom); | |
1497 | ||
3bff1865 | 1498 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1499 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1500 | return; |
e2ebc74d JB |
1501 | } |
1502 | ||
740c1aa3 | 1503 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1504 | info->control.vif = &sdata->vif; |
e2ebc74d | 1505 | |
3f52b7e3 MP |
1506 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1507 | if (ieee80211_is_data(hdr->frame_control) && | |
1508 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1509 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1510 | return; /* skb queued: don't free */ |
1511 | } else { | |
1512 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1513 | } | |
98aed9fd | 1514 | } |
cca89496 | 1515 | |
2154c81c | 1516 | ieee80211_set_qos_hdr(sdata, skb); |
55de908a | 1517 | ieee80211_tx(sdata, skb, false, band); |
e2ebc74d JB |
1518 | } |
1519 | ||
73b9f03a JB |
1520 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1521 | { | |
1522 | struct ieee80211_radiotap_iterator iterator; | |
1523 | struct ieee80211_radiotap_header *rthdr = | |
1524 | (struct ieee80211_radiotap_header *) skb->data; | |
1525 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1526 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1527 | NULL); | |
1528 | u16 txflags; | |
1529 | ||
1530 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1531 | IEEE80211_TX_CTL_DONTFRAG; | |
1532 | ||
1533 | /* | |
1534 | * for every radiotap entry that is present | |
1535 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1536 | * entries present, or -EINVAL on error) | |
1537 | */ | |
1538 | ||
1539 | while (!ret) { | |
1540 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1541 | ||
1542 | if (ret) | |
1543 | continue; | |
1544 | ||
1545 | /* see if this argument is something we can use */ | |
1546 | switch (iterator.this_arg_index) { | |
1547 | /* | |
1548 | * You must take care when dereferencing iterator.this_arg | |
1549 | * for multibyte types... the pointer is not aligned. Use | |
1550 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1551 | * iterator.this_arg for type "type" safely on all arches. | |
1552 | */ | |
1553 | case IEEE80211_RADIOTAP_FLAGS: | |
1554 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1555 | /* | |
1556 | * this indicates that the skb we have been | |
1557 | * handed has the 32-bit FCS CRC at the end... | |
1558 | * we should react to that by snipping it off | |
1559 | * because it will be recomputed and added | |
1560 | * on transmission | |
1561 | */ | |
1562 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1563 | return false; | |
1564 | ||
1565 | skb_trim(skb, skb->len - FCS_LEN); | |
1566 | } | |
1567 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1568 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1569 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1570 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1571 | break; | |
1572 | ||
1573 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1574 | txflags = get_unaligned_le16(iterator.this_arg); | |
1575 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1576 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1577 | break; | |
1578 | ||
1579 | /* | |
1580 | * Please update the file | |
1581 | * Documentation/networking/mac80211-injection.txt | |
1582 | * when parsing new fields here. | |
1583 | */ | |
1584 | ||
1585 | default: | |
1586 | break; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1591 | return false; | |
1592 | ||
1593 | /* | |
1594 | * remove the radiotap header | |
1595 | * iterator->_max_length was sanity-checked against | |
1596 | * skb->len by iterator init | |
1597 | */ | |
1598 | skb_pull(skb, iterator._max_length); | |
1599 | ||
1600 | return true; | |
1601 | } | |
1602 | ||
d0cf9c0d SH |
1603 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1604 | struct net_device *dev) | |
e2ebc74d JB |
1605 | { |
1606 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a JB |
1607 | struct ieee80211_chanctx_conf *chanctx_conf; |
1608 | struct ieee80211_channel *chan; | |
e2ebc74d JB |
1609 | struct ieee80211_radiotap_header *prthdr = |
1610 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1611 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1612 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1613 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
9b8a74e3 | 1614 | u16 len_rthdr; |
5d9cf4a5 | 1615 | int hdrlen; |
e2ebc74d | 1616 | |
9b8a74e3 AG |
1617 | /* check for not even having the fixed radiotap header part */ |
1618 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1619 | goto fail; /* too short to be possibly valid */ | |
1620 | ||
1621 | /* is it a header version we can trust to find length from? */ | |
1622 | if (unlikely(prthdr->it_version)) | |
1623 | goto fail; /* only version 0 is supported */ | |
1624 | ||
1625 | /* then there must be a radiotap header with a length we can use */ | |
1626 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1627 | ||
1628 | /* does the skb contain enough to deliver on the alleged length? */ | |
1629 | if (unlikely(skb->len < len_rthdr)) | |
1630 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1631 | |
e2ebc74d JB |
1632 | /* |
1633 | * fix up the pointers accounting for the radiotap | |
1634 | * header still being in there. We are being given | |
1635 | * a precooked IEEE80211 header so no need for | |
1636 | * normal processing | |
1637 | */ | |
9b8a74e3 | 1638 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1639 | /* |
9b8a74e3 AG |
1640 | * these are just fixed to the end of the rt area since we |
1641 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1642 | */ |
9b8a74e3 AG |
1643 | skb_set_network_header(skb, len_rthdr); |
1644 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1645 | |
5d9cf4a5 JB |
1646 | if (skb->len < len_rthdr + 2) |
1647 | goto fail; | |
1648 | ||
1649 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1650 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1651 | ||
1652 | if (skb->len < len_rthdr + hdrlen) | |
1653 | goto fail; | |
1654 | ||
f75f5c6f HS |
1655 | /* |
1656 | * Initialize skb->protocol if the injected frame is a data frame | |
1657 | * carrying a rfc1042 header | |
1658 | */ | |
5d9cf4a5 JB |
1659 | if (ieee80211_is_data(hdr->frame_control) && |
1660 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1661 | u8 *payload = (u8 *)hdr + hdrlen; | |
1662 | ||
b203ca39 | 1663 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1664 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1665 | payload[7]); | |
f75f5c6f HS |
1666 | } |
1667 | ||
3b8d81e0 JB |
1668 | memset(info, 0, sizeof(*info)); |
1669 | ||
5d9cf4a5 | 1670 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1671 | IEEE80211_TX_CTL_INJECTED; |
1672 | ||
1673 | /* process and remove the injection radiotap header */ | |
1674 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1675 | goto fail; | |
5d9cf4a5 JB |
1676 | |
1677 | rcu_read_lock(); | |
1678 | ||
1679 | /* | |
1680 | * We process outgoing injected frames that have a local address | |
1681 | * we handle as though they are non-injected frames. | |
1682 | * This code here isn't entirely correct, the local MAC address | |
1683 | * isn't always enough to find the interface to use; for proper | |
1684 | * VLAN/WDS support we will need a different mechanism (which | |
1685 | * likely isn't going to be monitor interfaces). | |
1686 | */ | |
1687 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1688 | ||
1689 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1690 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1691 | continue; | |
1692 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1693 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1694 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1695 | continue; | |
b203ca39 | 1696 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1697 | sdata = tmp_sdata; |
1698 | break; | |
1699 | } | |
1700 | } | |
7351c6bd | 1701 | |
55de908a JB |
1702 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1703 | if (!chanctx_conf) { | |
1704 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1705 | if (tmp_sdata) | |
1706 | chanctx_conf = | |
1707 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1708 | } | |
55de908a | 1709 | |
b4a7ff75 FF |
1710 | if (chanctx_conf) |
1711 | chan = chanctx_conf->def.chan; | |
1712 | else if (!local->use_chanctx) | |
675a0b04 | 1713 | chan = local->_oper_chandef.chan; |
b4a7ff75 FF |
1714 | else |
1715 | goto fail_rcu; | |
55de908a JB |
1716 | |
1717 | /* | |
1718 | * Frame injection is not allowed if beaconing is not allowed | |
1719 | * or if we need radar detection. Beaconing is usually not allowed when | |
1720 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1721 | * Passive scan is also used in world regulatory domains where | |
1722 | * your country is not known and as such it should be treated as | |
1723 | * NO TX unless the channel is explicitly allowed in which case | |
1724 | * your current regulatory domain would not have the passive scan | |
1725 | * flag. | |
1726 | * | |
1727 | * Since AP mode uses monitor interfaces to inject/TX management | |
1728 | * frames we can make AP mode the exception to this rule once it | |
1729 | * supports radar detection as its implementation can deal with | |
1730 | * radar detection by itself. We can do that later by adding a | |
1731 | * monitor flag interfaces used for AP support. | |
1732 | */ | |
8fe02e16 | 1733 | if ((chan->flags & (IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_RADAR))) |
55de908a JB |
1734 | goto fail_rcu; |
1735 | ||
1736 | ieee80211_xmit(sdata, skb, chan->band); | |
5d9cf4a5 JB |
1737 | rcu_read_unlock(); |
1738 | ||
e2ebc74d | 1739 | return NETDEV_TX_OK; |
9b8a74e3 | 1740 | |
55de908a JB |
1741 | fail_rcu: |
1742 | rcu_read_unlock(); | |
9b8a74e3 AG |
1743 | fail: |
1744 | dev_kfree_skb(skb); | |
1745 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1746 | } |
1747 | ||
ad38bfc9 MG |
1748 | /* |
1749 | * Measure Tx frame arrival time for Tx latency statistics calculation | |
1750 | * A single Tx frame latency should be measured from when it is entering the | |
1751 | * Kernel until we receive Tx complete confirmation indication and the skb is | |
1752 | * freed. | |
1753 | */ | |
1754 | static void ieee80211_tx_latency_start_msrmnt(struct ieee80211_local *local, | |
1755 | struct sk_buff *skb) | |
1756 | { | |
1757 | struct timespec skb_arv; | |
1758 | struct ieee80211_tx_latency_bin_ranges *tx_latency; | |
1759 | ||
1760 | tx_latency = rcu_dereference(local->tx_latency); | |
1761 | if (!tx_latency) | |
1762 | return; | |
1763 | ||
1764 | ktime_get_ts(&skb_arv); | |
1765 | skb->tstamp = ktime_set(skb_arv.tv_sec, skb_arv.tv_nsec); | |
1766 | } | |
1767 | ||
e2ebc74d JB |
1768 | /** |
1769 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1770 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1771 | * @skb: packet to be sent | |
1772 | * @dev: incoming interface | |
1773 | * | |
1774 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1775 | * not be freed, and caller is responsible for either retrying later or freeing | |
1776 | * skb). | |
1777 | * | |
1778 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1779 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1780 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1781 | * transmission (through low-level driver). | |
1782 | */ | |
d0cf9c0d SH |
1783 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1784 | struct net_device *dev) | |
e2ebc74d | 1785 | { |
133b8226 JB |
1786 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1787 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1788 | struct ieee80211_tx_info *info; |
dcf33963 | 1789 | int head_need; |
065e9605 HH |
1790 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1791 | __le16 fc; | |
e2ebc74d | 1792 | struct ieee80211_hdr hdr; |
ff67bb86 | 1793 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1794 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1795 | const u8 *encaps_data; |
1796 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1797 | int nh_pos, h_pos; |
f14543ee | 1798 | struct sta_info *sta = NULL; |
c2c98fde | 1799 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1800 | bool tdls_direct = false; |
a729cff8 JB |
1801 | bool multicast; |
1802 | u32 info_flags = 0; | |
1803 | u16 info_id = 0; | |
55de908a JB |
1804 | struct ieee80211_chanctx_conf *chanctx_conf; |
1805 | struct ieee80211_sub_if_data *ap_sdata; | |
1806 | enum ieee80211_band band; | |
e2ebc74d | 1807 | |
dcf33963 | 1808 | if (unlikely(skb->len < ETH_HLEN)) |
e2ebc74d | 1809 | goto fail; |
e2ebc74d | 1810 | |
e2ebc74d JB |
1811 | /* convert Ethernet header to proper 802.11 header (based on |
1812 | * operation mode) */ | |
1813 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1814 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1815 | |
55de908a JB |
1816 | rcu_read_lock(); |
1817 | ||
ad38bfc9 MG |
1818 | /* Measure frame arrival for Tx latency statistics calculation */ |
1819 | ieee80211_tx_latency_start_msrmnt(local, skb); | |
1820 | ||
51fb61e7 | 1821 | switch (sdata->vif.type) { |
05c914fe | 1822 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1823 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1824 | if (sta) { |
1825 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1826 | /* RA TA DA SA */ | |
1827 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1828 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1829 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1830 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1831 | hdrlen = 30; | |
c2c98fde JB |
1832 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1833 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee | 1834 | } |
55de908a JB |
1835 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1836 | u.ap); | |
1837 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
1838 | if (!chanctx_conf) | |
1839 | goto fail_rcu; | |
4bf88530 | 1840 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1841 | if (sta) |
1842 | break; | |
1843 | /* fall through */ | |
1844 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1845 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1846 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1847 | if (!chanctx_conf) | |
1848 | goto fail_rcu; | |
065e9605 | 1849 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1850 | /* DA BSSID SA */ |
1851 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1852 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1853 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1854 | hdrlen = 24; | |
4bf88530 | 1855 | band = chanctx_conf->def.chan->band; |
cf966838 | 1856 | break; |
05c914fe | 1857 | case NL80211_IFTYPE_WDS: |
065e9605 | 1858 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1859 | /* RA TA DA SA */ |
1860 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1861 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1862 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1863 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1864 | hdrlen = 30; | |
55de908a JB |
1865 | /* |
1866 | * This is the exception! WDS style interfaces are prohibited | |
1867 | * when channel contexts are in used so this must be valid | |
1868 | */ | |
675a0b04 | 1869 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 1870 | break; |
33b64eb2 | 1871 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1872 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 1873 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1874 | struct sta_info *next_hop; |
1875 | bool mpp_lookup = true; | |
1876 | ||
bf7cd94d | 1877 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1878 | if (mpath) { |
1879 | mpp_lookup = false; | |
1880 | next_hop = rcu_dereference(mpath->next_hop); | |
1881 | if (!next_hop || | |
1882 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1883 | MESH_PATH_RESOLVING))) | |
1884 | mpp_lookup = true; | |
1885 | } | |
1886 | ||
1887 | if (mpp_lookup) | |
bf7cd94d | 1888 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1889 | |
1890 | if (mppath && mpath) | |
1891 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1892 | } |
79617dee | 1893 | |
f76b57b4 | 1894 | /* |
9d52501b JF |
1895 | * Use address extension if it is a packet from |
1896 | * another interface or if we know the destination | |
1897 | * is being proxied by a portal (i.e. portal address | |
1898 | * differs from proxied address) | |
f76b57b4 | 1899 | */ |
b203ca39 JP |
1900 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1901 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1902 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1903 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1904 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1905 | NULL, NULL); | |
79617dee | 1906 | } else { |
27f01124 TP |
1907 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1908 | * For unicast with unknown forwarding information, | |
1909 | * destination might be in the MBSS or if that fails | |
1910 | * forwarded to another mesh gate. In either case | |
1911 | * resolution will be handled in ieee80211_xmit(), so | |
1912 | * leave the original DA. This also works for mcast */ | |
1913 | const u8 *mesh_da = skb->data; | |
1914 | ||
1915 | if (mppath) | |
1916 | mesh_da = mppath->mpp; | |
1917 | else if (mpath) | |
1918 | mesh_da = mpath->dst; | |
79617dee | 1919 | |
3c5772a5 | 1920 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1921 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1922 | if (is_multicast_ether_addr(mesh_da)) |
1923 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1924 | meshhdrlen = ieee80211_new_mesh_header( |
1925 | sdata, &mesh_hdr, | |
1926 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1927 | else |
27f01124 | 1928 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1929 | meshhdrlen = ieee80211_new_mesh_header( |
1930 | sdata, &mesh_hdr, skb->data, | |
1931 | skb->data + ETH_ALEN); | |
79617dee | 1932 | |
79617dee | 1933 | } |
55de908a JB |
1934 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1935 | if (!chanctx_conf) | |
1936 | goto fail_rcu; | |
4bf88530 | 1937 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1938 | break; |
1939 | #endif | |
05c914fe | 1940 | case NL80211_IFTYPE_STATION: |
941c93cd | 1941 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1942 | bool tdls_peer = false; |
1943 | ||
941c93cd | 1944 | sta = sta_info_get(sdata, skb->data); |
c2c98fde JB |
1945 | if (sta) { |
1946 | authorized = test_sta_flag(sta, | |
1947 | WLAN_STA_AUTHORIZED); | |
1948 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1949 | tdls_peer = test_sta_flag(sta, | |
1950 | WLAN_STA_TDLS_PEER); | |
1951 | tdls_auth = test_sta_flag(sta, | |
1952 | WLAN_STA_TDLS_PEER_AUTH); | |
1953 | } | |
941c93cd AN |
1954 | |
1955 | /* | |
1956 | * If the TDLS link is enabled, send everything | |
1957 | * directly. Otherwise, allow TDLS setup frames | |
1958 | * to be transmitted indirectly. | |
1959 | */ | |
c2c98fde | 1960 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1961 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1962 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1963 | } | |
1964 | ||
1965 | if (tdls_direct) { | |
1966 | /* link during setup - throw out frames to peer */ | |
dcf33963 | 1967 | if (!tdls_auth) |
55de908a | 1968 | goto fail_rcu; |
941c93cd AN |
1969 | |
1970 | /* DA SA BSSID */ | |
1971 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1972 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1973 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1974 | hdrlen = 24; | |
1975 | } else if (sdata->u.mgd.use_4addr && | |
1976 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1977 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1978 | IEEE80211_FCTL_TODS); | |
f14543ee | 1979 | /* RA TA DA SA */ |
941c93cd | 1980 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1981 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1982 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1983 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1984 | hdrlen = 30; | |
1985 | } else { | |
1986 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1987 | /* BSSID SA DA */ | |
941c93cd | 1988 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
1989 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
1990 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1991 | hdrlen = 24; | |
1992 | } | |
55de908a JB |
1993 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1994 | if (!chanctx_conf) | |
1995 | goto fail_rcu; | |
4bf88530 | 1996 | band = chanctx_conf->def.chan->band; |
cf966838 | 1997 | break; |
05c914fe | 1998 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1999 | /* DA SA BSSID */ |
2000 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2001 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2002 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2003 | hdrlen = 24; |
55de908a JB |
2004 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2005 | if (!chanctx_conf) | |
2006 | goto fail_rcu; | |
4bf88530 | 2007 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2008 | break; |
2009 | default: | |
55de908a | 2010 | goto fail_rcu; |
e2ebc74d JB |
2011 | } |
2012 | ||
7d185b8b JB |
2013 | /* |
2014 | * There's no need to try to look up the destination | |
2015 | * if it is a multicast address (which can only happen | |
2016 | * in AP mode) | |
2017 | */ | |
a729cff8 JB |
2018 | multicast = is_multicast_ether_addr(hdr.addr1); |
2019 | if (!multicast) { | |
abe60632 | 2020 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
2021 | if (sta) { |
2022 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2023 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
2024 | } | |
e2ebc74d JB |
2025 | } |
2026 | ||
4777be41 JC |
2027 | /* For mesh, the use of the QoS header is mandatory */ |
2028 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 2029 | wme_sta = true; |
4777be41 | 2030 | |
3434fbd3 | 2031 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 2032 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 2033 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2034 | hdrlen += 2; |
2035 | } | |
2036 | ||
2037 | /* | |
238814fd JB |
2038 | * Drop unicast frames to unauthorised stations unless they are |
2039 | * EAPOL frames from the local station. | |
ce3edf6d | 2040 | */ |
55182e4a | 2041 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
a6ececf4 | 2042 | !multicast && !authorized && |
55182e4a | 2043 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2044 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2045 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2046 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 2047 | dev->name, hdr.addr1); |
ce3edf6d JB |
2048 | #endif |
2049 | ||
2050 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2051 | ||
55de908a | 2052 | goto fail_rcu; |
ce3edf6d JB |
2053 | } |
2054 | ||
a729cff8 JB |
2055 | if (unlikely(!multicast && skb->sk && |
2056 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
2057 | struct sk_buff *orig_skb = skb; | |
2058 | ||
2059 | skb = skb_clone(skb, GFP_ATOMIC); | |
2060 | if (skb) { | |
2061 | unsigned long flags; | |
9475af6e | 2062 | int id; |
a729cff8 JB |
2063 | |
2064 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
9475af6e TH |
2065 | id = idr_alloc(&local->ack_status_frames, orig_skb, |
2066 | 1, 0x10000, GFP_ATOMIC); | |
a729cff8 JB |
2067 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2068 | ||
9475af6e | 2069 | if (id >= 0) { |
a729cff8 JB |
2070 | info_id = id; |
2071 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2072 | } else if (skb_shared(skb)) { | |
2073 | kfree_skb(orig_skb); | |
2074 | } else { | |
2075 | kfree_skb(skb); | |
2076 | skb = orig_skb; | |
2077 | } | |
2078 | } else { | |
2079 | /* couldn't clone -- lose tx status ... */ | |
2080 | skb = orig_skb; | |
2081 | } | |
2082 | } | |
2083 | ||
7e244707 HS |
2084 | /* |
2085 | * If the skb is shared we need to obtain our own copy. | |
2086 | */ | |
2087 | if (skb_shared(skb)) { | |
a729cff8 JB |
2088 | struct sk_buff *tmp_skb = skb; |
2089 | ||
2090 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2091 | WARN_ON(info_id); | |
2092 | ||
f8a0a781 | 2093 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2094 | kfree_skb(tmp_skb); |
2095 | ||
dcf33963 | 2096 | if (!skb) |
55de908a | 2097 | goto fail_rcu; |
7e244707 HS |
2098 | } |
2099 | ||
065e9605 | 2100 | hdr.frame_control = fc; |
e2ebc74d JB |
2101 | hdr.duration_id = 0; |
2102 | hdr.seq_ctrl = 0; | |
2103 | ||
2104 | skip_header_bytes = ETH_HLEN; | |
2105 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2106 | encaps_data = bridge_tunnel_header; | |
2107 | encaps_len = sizeof(bridge_tunnel_header); | |
2108 | skip_header_bytes -= 2; | |
e5c5d22e | 2109 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2110 | encaps_data = rfc1042_header; |
2111 | encaps_len = sizeof(rfc1042_header); | |
2112 | skip_header_bytes -= 2; | |
2113 | } else { | |
2114 | encaps_data = NULL; | |
2115 | encaps_len = 0; | |
2116 | } | |
2117 | ||
7e244707 HS |
2118 | nh_pos = skb_network_header(skb) - skb->data; |
2119 | h_pos = skb_transport_header(skb) - skb->data; | |
2120 | ||
e2ebc74d JB |
2121 | skb_pull(skb, skip_header_bytes); |
2122 | nh_pos -= skip_header_bytes; | |
2123 | h_pos -= skip_header_bytes; | |
2124 | ||
23c0752a | 2125 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2126 | |
23c0752a JB |
2127 | /* |
2128 | * So we need to modify the skb header and hence need a copy of | |
2129 | * that. The head_need variable above doesn't, so far, include | |
2130 | * the needed header space that we don't need right away. If we | |
2131 | * can, then we don't reallocate right now but only after the | |
2132 | * frame arrives at the master device (if it does...) | |
2133 | * | |
2134 | * If we cannot, however, then we will reallocate to include all | |
2135 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2136 | * make it big enough for everything we may ever need. | |
2137 | */ | |
e2ebc74d | 2138 | |
3a5be7d4 | 2139 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2140 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2141 | head_need += local->tx_headroom; |
2142 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2143 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2144 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2145 | skb = NULL; |
55de908a | 2146 | goto fail_rcu; |
c3e7724b | 2147 | } |
e2ebc74d JB |
2148 | } |
2149 | ||
2150 | if (encaps_data) { | |
2151 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2152 | nh_pos += encaps_len; | |
2153 | h_pos += encaps_len; | |
2154 | } | |
c29b9b9b | 2155 | |
e4ab7eb0 | 2156 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2157 | if (meshhdrlen > 0) { |
2158 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2159 | nh_pos += meshhdrlen; | |
2160 | h_pos += meshhdrlen; | |
2161 | } | |
e4ab7eb0 | 2162 | #endif |
33b64eb2 | 2163 | |
065e9605 | 2164 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2165 | __le16 *qos_control; |
2166 | ||
f359d3fe | 2167 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2168 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2169 | /* | |
2170 | * Maybe we could actually set some fields here, for now just | |
2171 | * initialise to zero to indicate no special operation. | |
2172 | */ | |
2173 | *qos_control = 0; | |
2174 | } else | |
2175 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2176 | ||
e2ebc74d JB |
2177 | nh_pos += hdrlen; |
2178 | h_pos += hdrlen; | |
2179 | ||
68aae116 SH |
2180 | dev->stats.tx_packets++; |
2181 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2182 | |
2183 | /* Update skb pointers to various headers since this modified frame | |
2184 | * is going to go through Linux networking code that may potentially | |
2185 | * need things like pointer to IP header. */ | |
2186 | skb_set_mac_header(skb, 0); | |
2187 | skb_set_network_header(skb, nh_pos); | |
2188 | skb_set_transport_header(skb, h_pos); | |
2189 | ||
489ee919 | 2190 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2191 | memset(info, 0, sizeof(*info)); |
2192 | ||
e2ebc74d | 2193 | dev->trans_start = jiffies; |
a729cff8 JB |
2194 | |
2195 | info->flags = info_flags; | |
2196 | info->ack_frame_id = info_id; | |
2197 | ||
55de908a JB |
2198 | ieee80211_xmit(sdata, skb, band); |
2199 | rcu_read_unlock(); | |
e2ebc74d | 2200 | |
ec634fe3 | 2201 | return NETDEV_TX_OK; |
e2ebc74d | 2202 | |
55de908a JB |
2203 | fail_rcu: |
2204 | rcu_read_unlock(); | |
e2ebc74d | 2205 | fail: |
dcf33963 JB |
2206 | dev_kfree_skb(skb); |
2207 | return NETDEV_TX_OK; | |
e2ebc74d JB |
2208 | } |
2209 | ||
e2ebc74d | 2210 | |
e2530083 JB |
2211 | /* |
2212 | * ieee80211_clear_tx_pending may not be called in a context where | |
2213 | * it is possible that it packets could come in again. | |
2214 | */ | |
e2ebc74d JB |
2215 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2216 | { | |
1f98ab7f | 2217 | struct sk_buff *skb; |
2de8e0d9 | 2218 | int i; |
e2ebc74d | 2219 | |
1f98ab7f FF |
2220 | for (i = 0; i < local->hw.queues; i++) { |
2221 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2222 | ieee80211_free_txskb(&local->hw, skb); | |
2223 | } | |
e2ebc74d JB |
2224 | } |
2225 | ||
7bb45683 JB |
2226 | /* |
2227 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2228 | * which in this case means re-queued -- take as an indication to stop sending | |
2229 | * more pending frames. | |
2230 | */ | |
cd8ffc80 JB |
2231 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2232 | struct sk_buff *skb) | |
2233 | { | |
2234 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2235 | struct ieee80211_sub_if_data *sdata; | |
2236 | struct sta_info *sta; | |
2237 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2238 | bool result; |
55de908a | 2239 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2240 | |
5061b0c2 | 2241 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2242 | |
2243 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2244 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2245 | if (unlikely(!chanctx_conf)) { | |
2246 | dev_kfree_skb(skb); | |
2247 | return true; | |
2248 | } | |
2249 | result = ieee80211_tx(sdata, skb, true, | |
4bf88530 | 2250 | chanctx_conf->def.chan->band); |
cd8ffc80 | 2251 | } else { |
252b86c4 JB |
2252 | struct sk_buff_head skbs; |
2253 | ||
2254 | __skb_queue_head_init(&skbs); | |
2255 | __skb_queue_tail(&skbs, skb); | |
2256 | ||
cd8ffc80 | 2257 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2258 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2259 | |
74e4dbfd | 2260 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2261 | } |
2262 | ||
cd8ffc80 JB |
2263 | return result; |
2264 | } | |
2265 | ||
e2530083 | 2266 | /* |
3b8d81e0 | 2267 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2268 | */ |
e2ebc74d JB |
2269 | void ieee80211_tx_pending(unsigned long data) |
2270 | { | |
2271 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2272 | unsigned long flags; |
cd8ffc80 | 2273 | int i; |
3b8d81e0 | 2274 | bool txok; |
e2ebc74d | 2275 | |
f0e72851 | 2276 | rcu_read_lock(); |
e2530083 | 2277 | |
3b8d81e0 | 2278 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2279 | for (i = 0; i < local->hw.queues; i++) { |
2280 | /* | |
2281 | * If queue is stopped by something other than due to pending | |
2282 | * frames, or we have no pending frames, proceed to next queue. | |
2283 | */ | |
3b8d81e0 | 2284 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2285 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2286 | continue; |
e2530083 | 2287 | |
2a577d98 | 2288 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2289 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2290 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2291 | |
a7bc376c | 2292 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2293 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2294 | continue; |
2295 | } | |
2296 | ||
3b8d81e0 JB |
2297 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2298 | flags); | |
2299 | ||
2300 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2301 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2302 | flags); | |
2303 | if (!txok) | |
2a577d98 | 2304 | break; |
e2ebc74d | 2305 | } |
7236fe29 JB |
2306 | |
2307 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2308 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2309 | } |
3b8d81e0 | 2310 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2311 | |
f0e72851 | 2312 | rcu_read_unlock(); |
e2ebc74d JB |
2313 | } |
2314 | ||
2315 | /* functions for drivers to get certain frames */ | |
2316 | ||
eac70c13 MP |
2317 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2318 | struct ps_data *ps, struct sk_buff *skb) | |
e2ebc74d JB |
2319 | { |
2320 | u8 *pos, *tim; | |
2321 | int aid0 = 0; | |
2322 | int i, have_bits = 0, n1, n2; | |
2323 | ||
2324 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2325 | * mode. */ | |
d012a605 | 2326 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2327 | /* in the hope that this is faster than |
2328 | * checking byte-for-byte */ | |
f359d3fe | 2329 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d JB |
2330 | IEEE80211_MAX_AID+1); |
2331 | ||
d012a605 MP |
2332 | if (ps->dtim_count == 0) |
2333 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
e2ebc74d | 2334 | else |
d012a605 | 2335 | ps->dtim_count--; |
e2ebc74d JB |
2336 | |
2337 | tim = pos = (u8 *) skb_put(skb, 6); | |
2338 | *pos++ = WLAN_EID_TIM; | |
2339 | *pos++ = 4; | |
d012a605 | 2340 | *pos++ = ps->dtim_count; |
8860020e | 2341 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2342 | |
d012a605 | 2343 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2344 | aid0 = 1; |
2345 | ||
d012a605 | 2346 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2347 | |
e2ebc74d JB |
2348 | if (have_bits) { |
2349 | /* Find largest even number N1 so that bits numbered 1 through | |
2350 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2351 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2352 | n1 = 0; | |
2353 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2354 | if (ps->tim[i]) { |
e2ebc74d JB |
2355 | n1 = i & 0xfe; |
2356 | break; | |
2357 | } | |
2358 | } | |
2359 | n2 = n1; | |
2360 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2361 | if (ps->tim[i]) { |
e2ebc74d JB |
2362 | n2 = i; |
2363 | break; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | /* Bitmap control */ | |
2368 | *pos++ = n1 | aid0; | |
2369 | /* Part Virt Bitmap */ | |
5220da39 | 2370 | skb_put(skb, n2 - n1); |
d012a605 | 2371 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2372 | |
2373 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2374 | } else { |
2375 | *pos++ = aid0; /* Bitmap control */ | |
2376 | *pos++ = 0; /* Part Virt Bitmap */ | |
2377 | } | |
e2ebc74d JB |
2378 | } |
2379 | ||
eac70c13 MP |
2380 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2381 | struct ps_data *ps, struct sk_buff *skb) | |
2382 | { | |
2383 | struct ieee80211_local *local = sdata->local; | |
2384 | ||
2385 | /* | |
2386 | * Not very nice, but we want to allow the driver to call | |
2387 | * ieee80211_beacon_get() as a response to the set_tim() | |
2388 | * callback. That, however, is already invoked under the | |
2389 | * sta_lock to guarantee consistent and race-free update | |
2390 | * of the tim bitmap in mac80211 and the driver. | |
2391 | */ | |
2392 | if (local->tim_in_locked_section) { | |
2393 | __ieee80211_beacon_add_tim(sdata, ps, skb); | |
2394 | } else { | |
1b91731d | 2395 | spin_lock_bh(&local->tim_lock); |
eac70c13 | 2396 | __ieee80211_beacon_add_tim(sdata, ps, skb); |
1b91731d | 2397 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2398 | } |
2399 | ||
2400 | return 0; | |
2401 | } | |
2402 | ||
73da7d5b SW |
2403 | void ieee80211_csa_finish(struct ieee80211_vif *vif) |
2404 | { | |
2405 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2406 | ||
2407 | ieee80211_queue_work(&sdata->local->hw, | |
2408 | &sdata->csa_finalize_work); | |
2409 | } | |
2410 | EXPORT_SYMBOL(ieee80211_csa_finish); | |
2411 | ||
2412 | static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata, | |
2413 | struct beacon_data *beacon) | |
2414 | { | |
2415 | struct probe_resp *resp; | |
2416 | int counter_offset_beacon = sdata->csa_counter_offset_beacon; | |
2417 | int counter_offset_presp = sdata->csa_counter_offset_presp; | |
cd7760e6 SW |
2418 | u8 *beacon_data; |
2419 | size_t beacon_data_len; | |
2420 | ||
2421 | switch (sdata->vif.type) { | |
2422 | case NL80211_IFTYPE_AP: | |
2423 | beacon_data = beacon->tail; | |
2424 | beacon_data_len = beacon->tail_len; | |
2425 | break; | |
2426 | case NL80211_IFTYPE_ADHOC: | |
2427 | beacon_data = beacon->head; | |
2428 | beacon_data_len = beacon->head_len; | |
2429 | break; | |
b8456a14 CYY |
2430 | case NL80211_IFTYPE_MESH_POINT: |
2431 | beacon_data = beacon->head; | |
2432 | beacon_data_len = beacon->head_len; | |
2433 | break; | |
cd7760e6 SW |
2434 | default: |
2435 | return; | |
2436 | } | |
2437 | if (WARN_ON(counter_offset_beacon >= beacon_data_len)) | |
2438 | return; | |
73da7d5b SW |
2439 | |
2440 | /* warn if the driver did not check for/react to csa completeness */ | |
cd7760e6 | 2441 | if (WARN_ON(beacon_data[counter_offset_beacon] == 0)) |
73da7d5b SW |
2442 | return; |
2443 | ||
cd7760e6 | 2444 | beacon_data[counter_offset_beacon]--; |
73da7d5b | 2445 | |
cd7760e6 | 2446 | if (sdata->vif.type == NL80211_IFTYPE_AP && counter_offset_presp) { |
73da7d5b SW |
2447 | rcu_read_lock(); |
2448 | resp = rcu_dereference(sdata->u.ap.probe_resp); | |
2449 | ||
2450 | /* if nl80211 accepted the offset, this should not happen. */ | |
2451 | if (WARN_ON(!resp)) { | |
2452 | rcu_read_unlock(); | |
2453 | return; | |
2454 | } | |
2455 | resp->data[counter_offset_presp]--; | |
2456 | rcu_read_unlock(); | |
2457 | } | |
2458 | } | |
2459 | ||
2460 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
2461 | { | |
2462 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2463 | struct beacon_data *beacon = NULL; | |
2464 | u8 *beacon_data; | |
2465 | size_t beacon_data_len; | |
2466 | int counter_beacon = sdata->csa_counter_offset_beacon; | |
2467 | int ret = false; | |
2468 | ||
2469 | if (!ieee80211_sdata_running(sdata)) | |
2470 | return false; | |
2471 | ||
2472 | rcu_read_lock(); | |
2473 | if (vif->type == NL80211_IFTYPE_AP) { | |
2474 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
2475 | ||
2476 | beacon = rcu_dereference(ap->beacon); | |
2477 | if (WARN_ON(!beacon || !beacon->tail)) | |
2478 | goto out; | |
2479 | beacon_data = beacon->tail; | |
2480 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
2481 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
2482 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
2483 | ||
2484 | beacon = rcu_dereference(ifibss->presp); | |
2485 | if (!beacon) | |
2486 | goto out; | |
2487 | ||
b8456a14 CYY |
2488 | beacon_data = beacon->head; |
2489 | beacon_data_len = beacon->head_len; | |
2490 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
2491 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
2492 | ||
2493 | beacon = rcu_dereference(ifmsh->beacon); | |
2494 | if (!beacon) | |
2495 | goto out; | |
2496 | ||
cd7760e6 SW |
2497 | beacon_data = beacon->head; |
2498 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
2499 | } else { |
2500 | WARN_ON(1); | |
2501 | goto out; | |
2502 | } | |
2503 | ||
2504 | if (WARN_ON(counter_beacon > beacon_data_len)) | |
2505 | goto out; | |
2506 | ||
2507 | if (beacon_data[counter_beacon] == 0) | |
2508 | ret = true; | |
2509 | out: | |
2510 | rcu_read_unlock(); | |
2511 | ||
2512 | return ret; | |
2513 | } | |
2514 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
2515 | ||
eddcbb94 JB |
2516 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2517 | struct ieee80211_vif *vif, | |
2518 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2519 | { |
2520 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2521 | struct sk_buff *skb = NULL; |
e039fa4a | 2522 | struct ieee80211_tx_info *info; |
e2ebc74d | 2523 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2524 | enum ieee80211_band band; |
e00cfce0 | 2525 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2526 | struct ieee80211_chanctx_conf *chanctx_conf; |
8318d78a | 2527 | |
5dfdaf58 | 2528 | rcu_read_lock(); |
e2ebc74d | 2529 | |
32bfd35d | 2530 | sdata = vif_to_sdata(vif); |
55de908a | 2531 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2532 | |
55de908a | 2533 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2534 | goto out; |
2535 | ||
eddcbb94 JB |
2536 | if (tim_offset) |
2537 | *tim_offset = 0; | |
2538 | if (tim_length) | |
2539 | *tim_length = 0; | |
2540 | ||
05c914fe | 2541 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 MP |
2542 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
2543 | struct beacon_data *beacon = rcu_dereference(ap->beacon); | |
2544 | ||
3ad97fbc | 2545 | if (beacon) { |
73da7d5b SW |
2546 | if (sdata->vif.csa_active) |
2547 | ieee80211_update_csa(sdata, beacon); | |
2548 | ||
902acc78 JB |
2549 | /* |
2550 | * headroom, head length, | |
2551 | * tail length and maximum TIM length | |
2552 | */ | |
2553 | skb = dev_alloc_skb(local->tx_headroom + | |
2554 | beacon->head_len + | |
70dabeb7 FF |
2555 | beacon->tail_len + 256 + |
2556 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
2557 | if (!skb) |
2558 | goto out; | |
33b64eb2 | 2559 | |
902acc78 JB |
2560 | skb_reserve(skb, local->tx_headroom); |
2561 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2562 | beacon->head_len); | |
33b64eb2 | 2563 | |
eac70c13 | 2564 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb); |
33b64eb2 | 2565 | |
eddcbb94 JB |
2566 | if (tim_offset) |
2567 | *tim_offset = beacon->head_len; | |
2568 | if (tim_length) | |
2569 | *tim_length = skb->len - beacon->head_len; | |
2570 | ||
902acc78 JB |
2571 | if (beacon->tail) |
2572 | memcpy(skb_put(skb, beacon->tail_len), | |
2573 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2574 | } else |
2575 | goto out; | |
05c914fe | 2576 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2577 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2578 | struct ieee80211_hdr *hdr; |
c3ffeab4 | 2579 | struct beacon_data *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2580 | |
af8cdcd8 | 2581 | if (!presp) |
9d139c81 JB |
2582 | goto out; |
2583 | ||
cd7760e6 SW |
2584 | if (sdata->vif.csa_active) |
2585 | ieee80211_update_csa(sdata, presp); | |
2586 | ||
2587 | ||
70dabeb7 FF |
2588 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len + |
2589 | local->hw.extra_beacon_tailroom); | |
9d139c81 JB |
2590 | if (!skb) |
2591 | goto out; | |
c3ffeab4 JB |
2592 | skb_reserve(skb, local->tx_headroom); |
2593 | memcpy(skb_put(skb, presp->head_len), presp->head, | |
2594 | presp->head_len); | |
9d139c81 JB |
2595 | |
2596 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2597 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2598 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2599 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2600 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 2601 | struct beacon_data *bcn = rcu_dereference(ifmsh->beacon); |
472dbc45 | 2602 | |
2b5e1967 | 2603 | if (!bcn) |
ac1bd846 | 2604 | goto out; |
ac1bd846 | 2605 | |
b8456a14 CYY |
2606 | if (sdata->vif.csa_active) |
2607 | ieee80211_update_csa(sdata, bcn); | |
2608 | ||
dbf498fb | 2609 | if (ifmsh->sync_ops) |
43552be1 | 2610 | ifmsh->sync_ops->adjust_tbtt(sdata, bcn); |
dbf498fb | 2611 | |
3b69a9c5 | 2612 | skb = dev_alloc_skb(local->tx_headroom + |
2b5e1967 | 2613 | bcn->head_len + |
3f52b7e3 | 2614 | 256 + /* TIM IE */ |
70dabeb7 FF |
2615 | bcn->tail_len + |
2616 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
2617 | if (!skb) |
2618 | goto out; | |
2b5e1967 TP |
2619 | skb_reserve(skb, local->tx_headroom); |
2620 | memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len); | |
2621 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb); | |
2622 | memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len); | |
9d139c81 JB |
2623 | } else { |
2624 | WARN_ON(1); | |
5dfdaf58 | 2625 | goto out; |
e2ebc74d JB |
2626 | } |
2627 | ||
4bf88530 | 2628 | band = chanctx_conf->def.chan->band; |
55de908a | 2629 | |
e039fa4a JB |
2630 | info = IEEE80211_SKB_CB(skb); |
2631 | ||
3b8d81e0 | 2632 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2633 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2634 | info->band = band; |
e00cfce0 JM |
2635 | |
2636 | memset(&txrc, 0, sizeof(txrc)); | |
2637 | txrc.hw = hw; | |
e31583cd | 2638 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2639 | txrc.bss_conf = &sdata->vif.bss_conf; |
2640 | txrc.skb = skb; | |
2641 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2642 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2643 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2644 | txrc.max_rate_idx = -1; |
2645 | else | |
2646 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2647 | txrc.bss = true; |
e00cfce0 | 2648 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2649 | |
2650 | info->control.vif = vif; | |
f591fa5d | 2651 | |
a472e71b JL |
2652 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2653 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2654 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2655 | out: |
5dfdaf58 | 2656 | rcu_read_unlock(); |
e2ebc74d JB |
2657 | return skb; |
2658 | } | |
eddcbb94 | 2659 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2660 | |
02945821 AN |
2661 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2662 | struct ieee80211_vif *vif) | |
2663 | { | |
2664 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2665 | struct sk_buff *skb = NULL; |
2666 | struct probe_resp *presp = NULL; | |
02945821 AN |
2667 | struct ieee80211_hdr *hdr; |
2668 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2669 | ||
2670 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2671 | return NULL; | |
2672 | ||
2673 | rcu_read_lock(); | |
2674 | ||
2675 | ap = &sdata->u.ap; | |
2676 | presp = rcu_dereference(ap->probe_resp); | |
2677 | if (!presp) | |
2678 | goto out; | |
2679 | ||
aa7a0080 | 2680 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2681 | if (!skb) |
2682 | goto out; | |
2683 | ||
aa7a0080 ES |
2684 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2685 | ||
02945821 AN |
2686 | hdr = (struct ieee80211_hdr *) skb->data; |
2687 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2688 | ||
2689 | out: | |
2690 | rcu_read_unlock(); | |
2691 | return skb; | |
2692 | } | |
2693 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2694 | ||
7044cc56 KV |
2695 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2696 | struct ieee80211_vif *vif) | |
2697 | { | |
2698 | struct ieee80211_sub_if_data *sdata; | |
2699 | struct ieee80211_if_managed *ifmgd; | |
2700 | struct ieee80211_pspoll *pspoll; | |
2701 | struct ieee80211_local *local; | |
2702 | struct sk_buff *skb; | |
2703 | ||
2704 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2705 | return NULL; | |
2706 | ||
2707 | sdata = vif_to_sdata(vif); | |
2708 | ifmgd = &sdata->u.mgd; | |
2709 | local = sdata->local; | |
2710 | ||
2711 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2712 | if (!skb) |
7044cc56 | 2713 | return NULL; |
d15b8459 | 2714 | |
7044cc56 KV |
2715 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2716 | ||
2717 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2718 | memset(pspoll, 0, sizeof(*pspoll)); | |
2719 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2720 | IEEE80211_STYPE_PSPOLL); | |
2721 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2722 | ||
2723 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2724 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2725 | ||
2726 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2727 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2728 | ||
2729 | return skb; | |
2730 | } | |
2731 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2732 | ||
2733 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2734 | struct ieee80211_vif *vif) | |
2735 | { | |
2736 | struct ieee80211_hdr_3addr *nullfunc; | |
2737 | struct ieee80211_sub_if_data *sdata; | |
2738 | struct ieee80211_if_managed *ifmgd; | |
2739 | struct ieee80211_local *local; | |
2740 | struct sk_buff *skb; | |
2741 | ||
2742 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2743 | return NULL; | |
2744 | ||
2745 | sdata = vif_to_sdata(vif); | |
2746 | ifmgd = &sdata->u.mgd; | |
2747 | local = sdata->local; | |
2748 | ||
2749 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2750 | if (!skb) |
7044cc56 | 2751 | return NULL; |
d15b8459 | 2752 | |
7044cc56 KV |
2753 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2754 | ||
2755 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2756 | sizeof(*nullfunc)); | |
2757 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2758 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2759 | IEEE80211_STYPE_NULLFUNC | | |
2760 | IEEE80211_FCTL_TODS); | |
2761 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2762 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2763 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2764 | ||
2765 | return skb; | |
2766 | } | |
2767 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2768 | ||
05e54ea6 KV |
2769 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2770 | struct ieee80211_vif *vif, | |
2771 | const u8 *ssid, size_t ssid_len, | |
b9a9ada1 | 2772 | size_t tailroom) |
05e54ea6 KV |
2773 | { |
2774 | struct ieee80211_sub_if_data *sdata; | |
2775 | struct ieee80211_local *local; | |
2776 | struct ieee80211_hdr_3addr *hdr; | |
2777 | struct sk_buff *skb; | |
2778 | size_t ie_ssid_len; | |
2779 | u8 *pos; | |
2780 | ||
2781 | sdata = vif_to_sdata(vif); | |
2782 | local = sdata->local; | |
2783 | ie_ssid_len = 2 + ssid_len; | |
2784 | ||
2785 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2786 | ie_ssid_len + tailroom); |
d15b8459 | 2787 | if (!skb) |
05e54ea6 | 2788 | return NULL; |
05e54ea6 KV |
2789 | |
2790 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2791 | ||
2792 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2793 | memset(hdr, 0, sizeof(*hdr)); | |
2794 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2795 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 2796 | eth_broadcast_addr(hdr->addr1); |
05e54ea6 | 2797 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
e83e6541 | 2798 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
2799 | |
2800 | pos = skb_put(skb, ie_ssid_len); | |
2801 | *pos++ = WLAN_EID_SSID; | |
2802 | *pos++ = ssid_len; | |
88c868c4 | 2803 | if (ssid_len) |
05e54ea6 KV |
2804 | memcpy(pos, ssid, ssid_len); |
2805 | pos += ssid_len; | |
2806 | ||
05e54ea6 KV |
2807 | return skb; |
2808 | } | |
2809 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2810 | ||
32bfd35d | 2811 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2812 | const void *frame, size_t frame_len, |
e039fa4a | 2813 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2814 | struct ieee80211_rts *rts) |
2815 | { | |
2816 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2817 | |
065e9605 HH |
2818 | rts->frame_control = |
2819 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2820 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2821 | frame_txctl); | |
e2ebc74d JB |
2822 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2823 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2824 | } | |
2825 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2826 | ||
32bfd35d | 2827 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2828 | const void *frame, size_t frame_len, |
e039fa4a | 2829 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2830 | struct ieee80211_cts *cts) |
2831 | { | |
2832 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2833 | |
065e9605 HH |
2834 | cts->frame_control = |
2835 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2836 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2837 | frame_len, frame_txctl); | |
e2ebc74d JB |
2838 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2839 | } | |
2840 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2841 | ||
2842 | struct sk_buff * | |
32bfd35d | 2843 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2844 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2845 | { |
2846 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2847 | struct sk_buff *skb = NULL; |
5cf121c3 | 2848 | struct ieee80211_tx_data tx; |
e2ebc74d | 2849 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 2850 | struct ps_data *ps; |
e039fa4a | 2851 | struct ieee80211_tx_info *info; |
55de908a | 2852 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 2853 | |
32bfd35d | 2854 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 2855 | |
5dfdaf58 | 2856 | rcu_read_lock(); |
55de908a | 2857 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 2858 | |
d012a605 MP |
2859 | if (!chanctx_conf) |
2860 | goto out; | |
2861 | ||
2862 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
2863 | struct beacon_data *beacon = | |
2864 | rcu_dereference(sdata->u.ap.beacon); | |
2865 | ||
2866 | if (!beacon || !beacon->head) | |
2867 | goto out; | |
2868 | ||
2869 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
2870 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2871 | ps = &sdata->u.mesh.ps; | |
d012a605 | 2872 | } else { |
747cf5e9 | 2873 | goto out; |
d012a605 | 2874 | } |
5dfdaf58 | 2875 | |
d012a605 | 2876 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 2877 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2878 | |
e2ebc74d | 2879 | while (1) { |
d012a605 | 2880 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 2881 | if (!skb) |
747cf5e9 | 2882 | goto out; |
e2ebc74d JB |
2883 | local->total_ps_buffered--; |
2884 | ||
d012a605 | 2885 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
2886 | struct ieee80211_hdr *hdr = |
2887 | (struct ieee80211_hdr *) skb->data; | |
2888 | /* more buffered multicast/broadcast frames ==> set | |
2889 | * MoreData flag in IEEE 802.11 header to inform PS | |
2890 | * STAs */ | |
2891 | hdr->frame_control |= | |
2892 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2893 | } | |
2894 | ||
7cbf9d01 MP |
2895 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
2896 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); | |
3b8d81e0 | 2897 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2898 | break; |
2899 | dev_kfree_skb_any(skb); | |
2900 | } | |
e039fa4a JB |
2901 | |
2902 | info = IEEE80211_SKB_CB(skb); | |
2903 | ||
5cf121c3 | 2904 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 2905 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 2906 | |
97b045d6 | 2907 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2908 | skb = NULL; |
97b045d6 | 2909 | out: |
d0709a65 | 2910 | rcu_read_unlock(); |
e2ebc74d JB |
2911 | |
2912 | return skb; | |
2913 | } | |
2914 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2915 | |
55de908a JB |
2916 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
2917 | struct sk_buff *skb, int tid, | |
2918 | enum ieee80211_band band) | |
3b8d81e0 | 2919 | { |
353d09c6 | 2920 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 2921 | |
3b8d81e0 JB |
2922 | skb_set_mac_header(skb, 0); |
2923 | skb_set_network_header(skb, 0); | |
2924 | skb_set_transport_header(skb, 0); | |
2925 | ||
3a25a8c8 | 2926 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 2927 | skb->priority = tid; |
cf0277e7 | 2928 | |
89afe614 JB |
2929 | skb->dev = sdata->dev; |
2930 | ||
3d34deb6 JB |
2931 | /* |
2932 | * The other path calling ieee80211_xmit is from the tasklet, | |
2933 | * and while we can handle concurrent transmissions locking | |
2934 | * requirements are that we do not come into tx with bhs on. | |
2935 | */ | |
2936 | local_bh_disable(); | |
55de908a | 2937 | ieee80211_xmit(sdata, skb, band); |
3d34deb6 | 2938 | local_bh_enable(); |
3b8d81e0 | 2939 | } |