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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 | ||
d8ca16db | 455 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
456 | return 0; |
457 | ||
458 | return 1; | |
459 | } | |
460 | ||
9ae54c84 | 461 | static ieee80211_tx_result |
5cf121c3 | 462 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
463 | { |
464 | struct sta_info *sta = tx->sta; | |
e039fa4a | 465 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
3393a608 | 466 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 467 | |
02f2f1a9 | 468 | if (unlikely(!sta)) |
9ae54c84 | 469 | return TX_CONTINUE; |
e2ebc74d | 470 | |
c2c98fde | 471 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
472 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
473 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
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); | |
1d147bfa EG |
481 | |
482 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
483 | spin_lock(&sta->ps_lock); | |
484 | /* | |
485 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
486 | * been queued to pending queue. No reordering can happen, go | |
487 | * ahead and Tx the packet. | |
488 | */ | |
489 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
490 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
491 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
492 | spin_unlock(&sta->ps_lock); |
493 | return TX_CONTINUE; | |
494 | } | |
495 | ||
948d887d JB |
496 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
497 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
498 | ps_dbg(tx->sdata, |
499 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
500 | sta->sta.addr, ac); | |
c3e7724b | 501 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
502 | } else |
503 | tx->local->total_ps_buffered++; | |
004c872e | 504 | |
e039fa4a | 505 | info->control.jiffies = jiffies; |
5061b0c2 | 506 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 507 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
03c8c06f | 508 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 509 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 510 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
511 | |
512 | if (!timer_pending(&local->sta_cleanup)) | |
513 | mod_timer(&local->sta_cleanup, | |
514 | round_jiffies(jiffies + | |
515 | STA_INFO_CLEANUP_INTERVAL)); | |
516 | ||
c868cb35 JB |
517 | /* |
518 | * We queued up some frames, so the TIM bit might | |
519 | * need to be set, recalculate it. | |
520 | */ | |
521 | sta_info_recalc_tim(sta); | |
522 | ||
9ae54c84 | 523 | return TX_QUEUED; |
bdcbd8e0 JB |
524 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
525 | ps_dbg(tx->sdata, | |
526 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
527 | sta->sta.addr); | |
e2ebc74d | 528 | } |
e2ebc74d | 529 | |
9ae54c84 | 530 | return TX_CONTINUE; |
e2ebc74d JB |
531 | } |
532 | ||
d9e8a70f | 533 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 534 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 535 | { |
277d916f FF |
536 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
537 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
538 | ||
5cf121c3 | 539 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 540 | return TX_CONTINUE; |
e2ebc74d | 541 | |
277d916f | 542 | if (ieee80211_is_mgmt(hdr->frame_control) && |
b4ba544c | 543 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { |
277d916f FF |
544 | if (tx->flags & IEEE80211_TX_UNICAST) |
545 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
546 | return TX_CONTINUE; | |
547 | } | |
548 | ||
5cf121c3 | 549 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
550 | return ieee80211_tx_h_unicast_ps_buf(tx); |
551 | else | |
552 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
553 | } | |
554 | ||
a621fa4d JB |
555 | static ieee80211_tx_result debug_noinline |
556 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
557 | { | |
558 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
559 | ||
af61a165 JB |
560 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
561 | if (tx->sdata->control_port_no_encrypt) | |
562 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
563 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
564 | } | |
a621fa4d JB |
565 | |
566 | return TX_CONTINUE; | |
567 | } | |
568 | ||
d9e8a70f | 569 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 570 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 571 | { |
46e6de15 | 572 | struct ieee80211_key *key; |
e039fa4a | 573 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 574 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 575 | |
3b8d81e0 | 576 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 577 | tx->key = NULL; |
2475b1cc MS |
578 | else if (tx->sta && |
579 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 580 | tx->key = key; |
3cfcf6ac | 581 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 582 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 583 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
584 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
585 | tx->key = key; | |
f7e0104c JB |
586 | else if (is_multicast_ether_addr(hdr->addr1) && |
587 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
588 | tx->key = key; | |
589 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
590 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 591 | tx->key = key; |
46e6de15 JB |
592 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
593 | tx->key = NULL; | |
594 | else if (!tx->sdata->drop_unencrypted) | |
595 | tx->key = NULL; | |
596 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
597 | tx->key = NULL; | |
d8ca16db | 598 | else if (ieee80211_is_robust_mgmt_frame(tx->skb) && |
46e6de15 JB |
599 | !(ieee80211_is_action(hdr->frame_control) && |
600 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
601 | tx->key = NULL; | |
4922f71f | 602 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
d8ca16db | 603 | !ieee80211_is_robust_mgmt_frame(tx->skb)) |
4922f71f | 604 | tx->key = NULL; |
46e6de15 | 605 | else { |
e2ebc74d | 606 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 607 | return TX_DROP; |
46e6de15 | 608 | } |
e2ebc74d JB |
609 | |
610 | if (tx->key) { | |
813d7669 JB |
611 | bool skip_hw = false; |
612 | ||
e2ebc74d | 613 | tx->key->tx_rx_count++; |
011bfcc4 | 614 | /* TODO: add threshold stuff again */ |
176e4f84 | 615 | |
97359d12 JB |
616 | switch (tx->key->conf.cipher) { |
617 | case WLAN_CIPHER_SUITE_WEP40: | |
618 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 619 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 620 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
621 | tx->key = NULL; |
622 | break; | |
97359d12 | 623 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
624 | if (!ieee80211_is_data_present(hdr->frame_control) && |
625 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
626 | tx->skb)) | |
627 | tx->key = NULL; | |
3b43a187 KV |
628 | else |
629 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 630 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 631 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 632 | break; |
97359d12 | 633 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
634 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
635 | tx->key = NULL; | |
636 | break; | |
176e4f84 | 637 | } |
813d7669 | 638 | |
e54faf29 JB |
639 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
640 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
641 | return TX_DROP; |
642 | ||
f12553eb | 643 | if (!skip_hw && tx->key && |
382b1655 | 644 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 645 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
646 | } |
647 | ||
9ae54c84 | 648 | return TX_CONTINUE; |
e2ebc74d JB |
649 | } |
650 | ||
d9e8a70f | 651 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 652 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 653 | { |
e039fa4a | 654 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
655 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
656 | struct ieee80211_supported_band *sband; | |
a2c40249 | 657 | u32 len; |
e6a9854b | 658 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 659 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 660 | bool assoc = false; |
8318d78a | 661 | |
e6a9854b | 662 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 663 | |
2d56577b | 664 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 665 | |
a2c40249 | 666 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 667 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
668 | |
669 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 670 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
671 | txrc.sband = sband; |
672 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
673 | txrc.skb = tx->skb; | |
674 | txrc.reported_rate.idx = -1; | |
2d56577b | 675 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
676 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
677 | txrc.max_rate_idx = -1; | |
678 | else | |
679 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
680 | |
681 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
682 | txrc.rate_idx_mcs_mask = | |
683 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
684 | ||
8f0729b1 | 685 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 686 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 687 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
688 | |
689 | /* set up RTS protection if desired */ | |
b9a5f8ca | 690 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 691 | txrc.rts = true; |
e2ebc74d | 692 | } |
e2ebc74d | 693 | |
0d528d85 | 694 | info->control.use_rts = txrc.rts; |
991fec09 FF |
695 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
696 | ||
e6a9854b JB |
697 | /* |
698 | * Use short preamble if the BSS can handle it, but not for | |
699 | * management frames unless we know the receiver can handle | |
700 | * that -- the management frame might be to a station that | |
701 | * just wants a probe response. | |
702 | */ | |
703 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
704 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 705 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
706 | txrc.short_preamble = true; |
707 | ||
708 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 709 | |
c2c98fde JB |
710 | if (tx->sta) |
711 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
712 | |
713 | /* | |
714 | * Lets not bother rate control if we're associated and cannot | |
715 | * talk to the sta. This should not happen. | |
716 | */ | |
c2c98fde | 717 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
718 | !rate_usable_index_exists(sband, &tx->sta->sta), |
719 | "%s: Dropped data frame as no usable bitrate found while " | |
720 | "scanning and associated. Target station: " | |
721 | "%pM on %d GHz band\n", | |
47846c9b | 722 | tx->sdata->name, hdr->addr1, |
2d56577b | 723 | info->band ? 5 : 2)) |
b770b43e | 724 | return TX_DROP; |
2e92e6f2 | 725 | |
b770b43e LR |
726 | /* |
727 | * If we're associated with the sta at this point we know we can at | |
728 | * least send the frame at the lowest bit rate. | |
729 | */ | |
e6a9854b JB |
730 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
731 | ||
0d528d85 FF |
732 | if (tx->sta && !info->control.skip_table) |
733 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
734 | ||
735 | if (unlikely(info->control.rates[0].idx < 0)) { | |
736 | if (ratetbl) { | |
737 | struct ieee80211_tx_rate rate = { | |
738 | .idx = ratetbl->rate[0].idx, | |
739 | .flags = ratetbl->rate[0].flags, | |
740 | .count = ratetbl->rate[0].count | |
741 | }; | |
742 | ||
743 | if (ratetbl->rate[0].idx < 0) | |
744 | return TX_DROP; | |
745 | ||
746 | tx->rate = rate; | |
747 | } else { | |
748 | return TX_DROP; | |
749 | } | |
750 | } else { | |
751 | tx->rate = info->control.rates[0]; | |
752 | } | |
e6a9854b | 753 | |
c1ce5a74 | 754 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 755 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
756 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
757 | tx->sta->last_tx_rate = txrc.reported_rate; | |
758 | } else if (tx->sta) | |
e6a9854b | 759 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 760 | |
0d528d85 FF |
761 | if (ratetbl) |
762 | return TX_CONTINUE; | |
763 | ||
e6a9854b JB |
764 | if (unlikely(!info->control.rates[0].count)) |
765 | info->control.rates[0].count = 1; | |
e2ebc74d | 766 | |
9955151d GS |
767 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
768 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
769 | info->control.rates[0].count = 1; | |
770 | ||
e6a9854b JB |
771 | return TX_CONTINUE; |
772 | } | |
773 | ||
f591fa5d JB |
774 | static ieee80211_tx_result debug_noinline |
775 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
776 | { | |
777 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
778 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
779 | u16 *seq; | |
780 | u8 *qc; | |
781 | int tid; | |
782 | ||
25d834e1 JB |
783 | /* |
784 | * Packet injection may want to control the sequence | |
785 | * number, if we have no matching interface then we | |
786 | * neither assign one ourselves nor ask the driver to. | |
787 | */ | |
5061b0c2 | 788 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
789 | return TX_CONTINUE; |
790 | ||
f591fa5d JB |
791 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
792 | return TX_CONTINUE; | |
793 | ||
794 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
795 | return TX_CONTINUE; | |
796 | ||
49a59543 JB |
797 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
798 | return TX_CONTINUE; | |
799 | ||
94778280 JB |
800 | /* |
801 | * Anything but QoS data that has a sequence number field | |
802 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
803 | * counter. QoS data frames with a multicast destination |
804 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 805 | */ |
c4c205f3 BC |
806 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
807 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 808 | /* driver should assign sequence number */ |
f591fa5d | 809 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
810 | /* for pure STA mode without beacons, we can do it */ |
811 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
812 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
813 | return TX_CONTINUE; |
814 | } | |
815 | ||
816 | /* | |
817 | * This should be true for injected/management frames only, for | |
818 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
819 | * above since they are not QoS-data frames. | |
820 | */ | |
821 | if (!tx->sta) | |
822 | return TX_CONTINUE; | |
823 | ||
824 | /* include per-STA, per-TID sequence counter */ | |
825 | ||
826 | qc = ieee80211_get_qos_ctl(hdr); | |
827 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
828 | seq = &tx->sta->tid_seq[tid]; | |
829 | ||
830 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
831 | ||
832 | /* Increase the sequence number. */ | |
833 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
834 | ||
835 | return TX_CONTINUE; | |
836 | } | |
837 | ||
252b86c4 | 838 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
839 | struct sk_buff *skb, int hdrlen, |
840 | int frag_threshold) | |
841 | { | |
252b86c4 | 842 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 843 | struct ieee80211_tx_info *info; |
252b86c4 | 844 | struct sk_buff *tmp; |
2de8e0d9 JB |
845 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
846 | int pos = hdrlen + per_fragm; | |
847 | int rem = skb->len - hdrlen - per_fragm; | |
848 | ||
849 | if (WARN_ON(rem < 0)) | |
850 | return -EINVAL; | |
851 | ||
252b86c4 JB |
852 | /* first fragment was already added to queue by caller */ |
853 | ||
2de8e0d9 JB |
854 | while (rem) { |
855 | int fraglen = per_fragm; | |
856 | ||
857 | if (fraglen > rem) | |
858 | fraglen = rem; | |
859 | rem -= fraglen; | |
860 | tmp = dev_alloc_skb(local->tx_headroom + | |
861 | frag_threshold + | |
2475b1cc | 862 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
863 | IEEE80211_ENCRYPT_TAILROOM); |
864 | if (!tmp) | |
865 | return -ENOMEM; | |
252b86c4 JB |
866 | |
867 | __skb_queue_tail(&tx->skbs, tmp); | |
868 | ||
2475b1cc MS |
869 | skb_reserve(tmp, |
870 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
871 | ||
2de8e0d9 JB |
872 | /* copy control information */ |
873 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
874 | |
875 | info = IEEE80211_SKB_CB(tmp); | |
876 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
877 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
878 | ||
879 | if (rem) | |
880 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
881 | ||
2de8e0d9 JB |
882 | skb_copy_queue_mapping(tmp, skb); |
883 | tmp->priority = skb->priority; | |
2de8e0d9 | 884 | tmp->dev = skb->dev; |
2de8e0d9 JB |
885 | |
886 | /* copy header and data */ | |
887 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
888 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
889 | ||
890 | pos += fraglen; | |
891 | } | |
892 | ||
252b86c4 | 893 | /* adjust first fragment's length */ |
338f977f | 894 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
895 | return 0; |
896 | } | |
897 | ||
d9e8a70f | 898 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
899 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
900 | { | |
2de8e0d9 JB |
901 | struct sk_buff *skb = tx->skb; |
902 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
903 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 904 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
905 | int hdrlen; |
906 | int fragnum; | |
e2454948 | 907 | |
252b86c4 JB |
908 | /* no matter what happens, tx->skb moves to tx->skbs */ |
909 | __skb_queue_tail(&tx->skbs, skb); | |
910 | tx->skb = NULL; | |
911 | ||
a26eb27a JB |
912 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
913 | return TX_CONTINUE; | |
914 | ||
915 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
916 | return TX_CONTINUE; |
917 | ||
eefce91a JB |
918 | /* |
919 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 920 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 921 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 922 | */ |
8b30b1fe | 923 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
924 | return TX_DROP; |
925 | ||
065e9605 | 926 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 927 | |
a26eb27a | 928 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 929 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 930 | return TX_DROP; |
e6a9854b | 931 | |
2de8e0d9 JB |
932 | /* |
933 | * Now fragment the frame. This will allocate all the fragments and | |
934 | * chain them (using skb as the first fragment) to skb->next. | |
935 | * During transmission, we will remove the successfully transmitted | |
936 | * fragments from this list. When the low-level driver rejects one | |
937 | * of the fragments then we will simply pretend to accept the skb | |
938 | * but store it away as pending. | |
939 | */ | |
252b86c4 | 940 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 941 | return TX_DROP; |
e6a9854b | 942 | |
2de8e0d9 JB |
943 | /* update duration/seq/flags of fragments */ |
944 | fragnum = 0; | |
252b86c4 JB |
945 | |
946 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 947 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 948 | |
2de8e0d9 JB |
949 | hdr = (void *)skb->data; |
950 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 951 | |
252b86c4 | 952 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 953 | hdr->frame_control |= morefrags; |
e6a9854b JB |
954 | /* |
955 | * No multi-rate retries for fragmented frames, that | |
956 | * would completely throw off the NAV at other STAs. | |
957 | */ | |
958 | info->control.rates[1].idx = -1; | |
959 | info->control.rates[2].idx = -1; | |
960 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 961 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 962 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
963 | } else { |
964 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 965 | } |
2de8e0d9 JB |
966 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
967 | fragnum++; | |
252b86c4 | 968 | } |
e2ebc74d | 969 | |
9ae54c84 | 970 | return TX_CONTINUE; |
e2ebc74d JB |
971 | } |
972 | ||
feff1f2f JB |
973 | static ieee80211_tx_result debug_noinline |
974 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
975 | { | |
252b86c4 | 976 | struct sk_buff *skb; |
560d2682 | 977 | int ac = -1; |
feff1f2f JB |
978 | |
979 | if (!tx->sta) | |
980 | return TX_CONTINUE; | |
981 | ||
252b86c4 | 982 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 983 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 984 | tx->sta->tx_fragments++; |
560d2682 | 985 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 986 | } |
560d2682 JB |
987 | if (ac >= 0) |
988 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
989 | |
990 | return TX_CONTINUE; | |
991 | } | |
992 | ||
d9e8a70f | 993 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
994 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
995 | { | |
996 | if (!tx->key) | |
997 | return TX_CONTINUE; | |
998 | ||
97359d12 JB |
999 | switch (tx->key->conf.cipher) { |
1000 | case WLAN_CIPHER_SUITE_WEP40: | |
1001 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1002 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1003 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1004 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1005 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 1006 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 1007 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1008 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 1009 | default: |
d32a1028 | 1010 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1011 | } |
1012 | ||
e2454948 JB |
1013 | return TX_DROP; |
1014 | } | |
1015 | ||
d9e8a70f | 1016 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1017 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1018 | { | |
252b86c4 | 1019 | struct sk_buff *skb; |
2de8e0d9 JB |
1020 | struct ieee80211_hdr *hdr; |
1021 | int next_len; | |
1022 | bool group_addr; | |
03f93c3d | 1023 | |
252b86c4 | 1024 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1025 | hdr = (void *) skb->data; |
7e0aae47 JM |
1026 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1027 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1028 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1029 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1030 | next_len = next->len; | |
1031 | } else | |
1032 | next_len = 0; | |
2de8e0d9 | 1033 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1034 | |
2de8e0d9 | 1035 | hdr->duration_id = |
252b86c4 JB |
1036 | ieee80211_duration(tx, skb, group_addr, next_len); |
1037 | } | |
03f93c3d JB |
1038 | |
1039 | return TX_CONTINUE; | |
1040 | } | |
1041 | ||
e2ebc74d JB |
1042 | /* actual transmit path */ |
1043 | ||
a622ab72 JB |
1044 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1045 | struct sk_buff *skb, | |
1046 | struct ieee80211_tx_info *info, | |
1047 | struct tid_ampdu_tx *tid_tx, | |
1048 | int tid) | |
1049 | { | |
1050 | bool queued = false; | |
285fa695 | 1051 | bool reset_agg_timer = false; |
aa454580 | 1052 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1053 | |
1054 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1055 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1056 | reset_agg_timer = true; |
0ab33703 JB |
1057 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1058 | /* | |
1059 | * nothing -- this aggregation session is being started | |
1060 | * but that might still fail with the driver | |
1061 | */ | |
a622ab72 JB |
1062 | } else { |
1063 | spin_lock(&tx->sta->lock); | |
1064 | /* | |
1065 | * Need to re-check now, because we may get here | |
1066 | * | |
1067 | * 1) in the window during which the setup is actually | |
1068 | * already done, but not marked yet because not all | |
1069 | * packets are spliced over to the driver pending | |
1070 | * queue yet -- if this happened we acquire the lock | |
1071 | * either before or after the splice happens, but | |
1072 | * need to recheck which of these cases happened. | |
1073 | * | |
1074 | * 2) during session teardown, if the OPERATIONAL bit | |
1075 | * was cleared due to the teardown but the pointer | |
1076 | * hasn't been assigned NULL yet (or we loaded it | |
1077 | * before it was assigned) -- in this case it may | |
1078 | * now be NULL which means we should just let the | |
1079 | * packet pass through because splicing the frames | |
1080 | * back is already done. | |
1081 | */ | |
40b275b6 | 1082 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1083 | |
1084 | if (!tid_tx) { | |
1085 | /* do nothing, let packet pass through */ | |
1086 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1087 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1088 | reset_agg_timer = true; |
a622ab72 JB |
1089 | } else { |
1090 | queued = true; | |
1091 | info->control.vif = &tx->sdata->vif; | |
1092 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
03c8c06f | 1093 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1094 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1095 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1096 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1097 | } |
1098 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1099 | |
1100 | if (purge_skb) | |
c3e7724b | 1101 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1102 | } |
1103 | ||
285fa695 NM |
1104 | /* reset session timer */ |
1105 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1106 | tid_tx->last_tx = jiffies; |
285fa695 | 1107 | |
a622ab72 JB |
1108 | return queued; |
1109 | } | |
1110 | ||
58d4185e JB |
1111 | /* |
1112 | * initialises @tx | |
1113 | */ | |
9ae54c84 | 1114 | static ieee80211_tx_result |
3b8d81e0 JB |
1115 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1116 | struct ieee80211_tx_data *tx, | |
1117 | struct sk_buff *skb) | |
e2ebc74d | 1118 | { |
3b8d81e0 | 1119 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1120 | struct ieee80211_hdr *hdr; |
e039fa4a | 1121 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1122 | int tid; |
a622ab72 | 1123 | u8 *qc; |
e2ebc74d JB |
1124 | |
1125 | memset(tx, 0, sizeof(*tx)); | |
1126 | tx->skb = skb; | |
e2ebc74d | 1127 | tx->local = local; |
3b8d81e0 | 1128 | tx->sdata = sdata; |
252b86c4 | 1129 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1130 | |
cd8ffc80 JB |
1131 | /* |
1132 | * If this flag is set to true anywhere, and we get here, | |
1133 | * we are doing the needed processing, so remove the flag | |
1134 | * now. | |
1135 | */ | |
1136 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1137 | ||
58d4185e JB |
1138 | hdr = (struct ieee80211_hdr *) skb->data; |
1139 | ||
3f0e0b22 | 1140 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1141 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1142 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1143 | return TX_DROP; | |
03bb7f42 FF |
1144 | } else if (info->flags & (IEEE80211_TX_CTL_INJECTED | |
1145 | IEEE80211_TX_INTFL_NL80211_FRAME_TX) || | |
66f2c99a | 1146 | tx->sdata->control_port_protocol == tx->skb->protocol) { |
b4d57adb | 1147 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1148 | } |
f14543ee | 1149 | if (!tx->sta) |
abe60632 | 1150 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1151 | |
cd8ffc80 | 1152 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1153 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1154 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1155 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1156 | struct tid_ampdu_tx *tid_tx; |
1157 | ||
8b30b1fe S |
1158 | qc = ieee80211_get_qos_ctl(hdr); |
1159 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1160 | ||
a622ab72 JB |
1161 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1162 | if (tid_tx) { | |
1163 | bool queued; | |
cd8ffc80 | 1164 | |
a622ab72 JB |
1165 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1166 | tid_tx, tid); | |
1167 | ||
1168 | if (unlikely(queued)) | |
1169 | return TX_QUEUED; | |
1170 | } | |
8b30b1fe S |
1171 | } |
1172 | ||
badffb72 | 1173 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1174 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1175 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1176 | } else |
5cf121c3 | 1177 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1178 | |
a26eb27a JB |
1179 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1180 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1181 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1182 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1183 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1184 | } |
1185 | ||
e2ebc74d | 1186 | if (!tx->sta) |
e039fa4a | 1187 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1188 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1189 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1190 | |
e039fa4a | 1191 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1192 | |
9ae54c84 | 1193 | return TX_CONTINUE; |
e2ebc74d JB |
1194 | } |
1195 | ||
11127e91 JB |
1196 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1197 | struct ieee80211_vif *vif, | |
1198 | struct ieee80211_sta *sta, | |
1199 | struct sk_buff_head *skbs, | |
1200 | bool txpending) | |
e2ebc74d | 1201 | { |
36323f81 | 1202 | struct ieee80211_tx_control control; |
252b86c4 | 1203 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1204 | unsigned long flags; |
e2ebc74d | 1205 | |
252b86c4 | 1206 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1207 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1208 | int q = info->hw_queue; | |
1209 | ||
1210 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1211 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1212 | __skb_unlink(skb, skbs); | |
c3e7724b | 1213 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1214 | continue; |
1215 | } | |
1216 | #endif | |
3b8d81e0 JB |
1217 | |
1218 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1219 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1220 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1221 | if (unlikely(info->flags & |
a7679ed5 SF |
1222 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1223 | if (local->queue_stop_reasons[q] & | |
1224 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1225 | /* | |
1226 | * Drop off-channel frames if queues | |
1227 | * are stopped for any reason other | |
1228 | * than off-channel operation. Never | |
1229 | * queue them. | |
1230 | */ | |
1231 | spin_unlock_irqrestore( | |
1232 | &local->queue_stop_reason_lock, | |
1233 | flags); | |
1234 | ieee80211_purge_tx_queue(&local->hw, | |
1235 | skbs); | |
1236 | return true; | |
1237 | } | |
1238 | } else { | |
1239 | ||
6c17b77b | 1240 | /* |
a7679ed5 SF |
1241 | * Since queue is stopped, queue up frames for |
1242 | * later transmission from the tx-pending | |
1243 | * tasklet when the queue is woken again. | |
6c17b77b | 1244 | */ |
a7679ed5 SF |
1245 | if (txpending) |
1246 | skb_queue_splice_init(skbs, | |
1247 | &local->pending[q]); | |
1248 | else | |
1249 | skb_queue_splice_tail_init(skbs, | |
1250 | &local->pending[q]); | |
1251 | ||
1252 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1253 | flags); | |
1254 | return false; | |
6c17b77b | 1255 | } |
7bb45683 | 1256 | } |
3b8d81e0 | 1257 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1258 | |
11127e91 | 1259 | info->control.vif = vif; |
36323f81 | 1260 | control.sta = sta; |
f0e72851 | 1261 | |
11127e91 | 1262 | __skb_unlink(skb, skbs); |
36323f81 | 1263 | drv_tx(local, &control, skb); |
11127e91 | 1264 | } |
5061b0c2 | 1265 | |
11127e91 JB |
1266 | return true; |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1271 | */ | |
1272 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1273 | struct sk_buff_head *skbs, int led_len, | |
1274 | struct sta_info *sta, bool txpending) | |
1275 | { | |
1276 | struct ieee80211_tx_info *info; | |
1277 | struct ieee80211_sub_if_data *sdata; | |
1278 | struct ieee80211_vif *vif; | |
1279 | struct ieee80211_sta *pubsta; | |
1280 | struct sk_buff *skb; | |
1281 | bool result = true; | |
1282 | __le16 fc; | |
5061b0c2 | 1283 | |
11127e91 JB |
1284 | if (WARN_ON(skb_queue_empty(skbs))) |
1285 | return true; | |
ec25acc4 | 1286 | |
11127e91 JB |
1287 | skb = skb_peek(skbs); |
1288 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1289 | info = IEEE80211_SKB_CB(skb); | |
1290 | sdata = vif_to_sdata(info->control.vif); | |
1291 | if (sta && !sta->uploaded) | |
1292 | sta = NULL; | |
1293 | ||
1294 | if (sta) | |
1295 | pubsta = &sta->sta; | |
1296 | else | |
1297 | pubsta = NULL; | |
1298 | ||
1299 | switch (sdata->vif.type) { | |
1300 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1301 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1302 | vif = &sdata->vif; | |
1303 | break; | |
1304 | } | |
4b6f1dd6 | 1305 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1306 | if (sdata) { |
4b6f1dd6 | 1307 | vif = &sdata->vif; |
3a25a8c8 JB |
1308 | info->hw_queue = |
1309 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1310 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1311 | dev_kfree_skb(skb); | |
1312 | return true; | |
1313 | } else | |
4b6f1dd6 | 1314 | vif = NULL; |
11127e91 JB |
1315 | break; |
1316 | case NL80211_IFTYPE_AP_VLAN: | |
1317 | sdata = container_of(sdata->bss, | |
1318 | struct ieee80211_sub_if_data, u.ap); | |
1319 | /* fall through */ | |
1320 | default: | |
1321 | vif = &sdata->vif; | |
1322 | break; | |
e2ebc74d | 1323 | } |
2de8e0d9 | 1324 | |
cb831b53 JB |
1325 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1326 | txpending); | |
11127e91 | 1327 | |
74e4dbfd | 1328 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1329 | |
4db4e0a1 | 1330 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1331 | |
11127e91 | 1332 | return result; |
e2ebc74d JB |
1333 | } |
1334 | ||
97b045d6 JB |
1335 | /* |
1336 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1337 | * frame was dropped or queued. | |
1338 | */ | |
1339 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1340 | { | |
252b86c4 | 1341 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1342 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1343 | |
9aa4aee3 JB |
1344 | #define CALL_TXH(txh) \ |
1345 | do { \ | |
1346 | res = txh(tx); \ | |
1347 | if (res != TX_CONTINUE) \ | |
1348 | goto txh_done; \ | |
1349 | } while (0) | |
1350 | ||
5c1b98a5 | 1351 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1352 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1353 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1354 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1355 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1356 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1357 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1358 | |
aa5b5492 JB |
1359 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1360 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1361 | tx->skb = NULL; | |
c6fcf6bc | 1362 | goto txh_done; |
aa5b5492 | 1363 | } |
c6fcf6bc JB |
1364 | |
1365 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1366 | CALL_TXH(ieee80211_tx_h_sequence); |
1367 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1368 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1369 | CALL_TXH(ieee80211_tx_h_stats); |
1370 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1371 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1372 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1373 | #undef CALL_TXH |
97b045d6 | 1374 | |
d9e8a70f | 1375 | txh_done: |
97b045d6 | 1376 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1377 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1378 | if (tx->skb) |
c3e7724b | 1379 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1380 | else |
1f98ab7f | 1381 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1382 | return -1; |
1383 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1384 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1385 | return -1; |
1386 | } | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
06be6b14 FF |
1391 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1392 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1393 | int band, struct ieee80211_sta **sta) | |
1394 | { | |
1395 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1396 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1397 | struct ieee80211_tx_data tx; | |
1398 | ||
1399 | if (ieee80211_tx_prepare(sdata, &tx, skb) == TX_DROP) | |
1400 | return false; | |
1401 | ||
1402 | info->band = band; | |
1403 | info->control.vif = vif; | |
1404 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1405 | ||
1406 | if (invoke_tx_handlers(&tx)) | |
1407 | return false; | |
1408 | ||
1409 | if (sta) { | |
1410 | if (tx.sta) | |
1411 | *sta = &tx.sta->sta; | |
1412 | else | |
1413 | *sta = NULL; | |
1414 | } | |
1415 | ||
1416 | return true; | |
1417 | } | |
1418 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1419 | ||
7bb45683 JB |
1420 | /* |
1421 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1422 | */ | |
1423 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
55de908a JB |
1424 | struct sk_buff *skb, bool txpending, |
1425 | enum ieee80211_band band) | |
e2ebc74d | 1426 | { |
3b8d81e0 | 1427 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1428 | struct ieee80211_tx_data tx; |
97b045d6 | 1429 | ieee80211_tx_result res_prepare; |
e039fa4a | 1430 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1431 | bool result = true; |
74e4dbfd | 1432 | int led_len; |
e2ebc74d | 1433 | |
e2ebc74d JB |
1434 | if (unlikely(skb->len < 10)) { |
1435 | dev_kfree_skb(skb); | |
7bb45683 | 1436 | return true; |
e2ebc74d JB |
1437 | } |
1438 | ||
58d4185e | 1439 | /* initialises tx */ |
74e4dbfd | 1440 | led_len = skb->len; |
3b8d81e0 | 1441 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1442 | |
cd8ffc80 | 1443 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1444 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1445 | return true; |
cd8ffc80 | 1446 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1447 | return true; |
e2ebc74d JB |
1448 | } |
1449 | ||
55de908a | 1450 | info->band = band; |
e2ebc74d | 1451 | |
3a25a8c8 JB |
1452 | /* set up hw_queue value early */ |
1453 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1454 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1455 | info->hw_queue = | |
1456 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1457 | ||
7bb45683 | 1458 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1459 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1460 | tx.sta, txpending); | |
55de908a | 1461 | |
7bb45683 | 1462 | return result; |
e2ebc74d JB |
1463 | } |
1464 | ||
1465 | /* device xmit handlers */ | |
1466 | ||
3bff1865 | 1467 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1468 | struct sk_buff *skb, |
1469 | int head_need, bool may_encrypt) | |
1470 | { | |
3bff1865 | 1471 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1472 | int tail_need = 0; |
1473 | ||
3bff1865 | 1474 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1475 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1476 | tail_need -= skb_tailroom(skb); | |
1477 | tail_need = max_t(int, tail_need, 0); | |
1478 | } | |
1479 | ||
fc7c976d | 1480 | if (skb_cloned(skb)) |
23c0752a | 1481 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1482 | else if (head_need || tail_need) |
23c0752a | 1483 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1484 | else |
1485 | return 0; | |
23c0752a JB |
1486 | |
1487 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1488 | wiphy_debug(local->hw.wiphy, |
1489 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1490 | return -ENOMEM; |
1491 | } | |
1492 | ||
23c0752a JB |
1493 | return 0; |
1494 | } | |
1495 | ||
55de908a JB |
1496 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
1497 | enum ieee80211_band band) | |
e2ebc74d | 1498 | { |
3b8d81e0 | 1499 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1500 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1501 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1502 | int headroom; |
23c0752a | 1503 | bool may_encrypt; |
e2ebc74d | 1504 | |
3b8d81e0 | 1505 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1506 | |
3b8d81e0 | 1507 | headroom = local->tx_headroom; |
23c0752a | 1508 | if (may_encrypt) |
2475b1cc | 1509 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1510 | headroom -= skb_headroom(skb); |
1511 | headroom = max_t(int, 0, headroom); | |
1512 | ||
3bff1865 | 1513 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1514 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1515 | return; |
e2ebc74d JB |
1516 | } |
1517 | ||
740c1aa3 | 1518 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1519 | info->control.vif = &sdata->vif; |
e2ebc74d | 1520 | |
3f52b7e3 MP |
1521 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1522 | if (ieee80211_is_data(hdr->frame_control) && | |
1523 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1524 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1525 | return; /* skb queued: don't free */ |
1526 | } else { | |
1527 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1528 | } | |
98aed9fd | 1529 | } |
cca89496 | 1530 | |
2154c81c | 1531 | ieee80211_set_qos_hdr(sdata, skb); |
55de908a | 1532 | ieee80211_tx(sdata, skb, false, band); |
e2ebc74d JB |
1533 | } |
1534 | ||
73b9f03a JB |
1535 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1536 | { | |
1537 | struct ieee80211_radiotap_iterator iterator; | |
1538 | struct ieee80211_radiotap_header *rthdr = | |
1539 | (struct ieee80211_radiotap_header *) skb->data; | |
1540 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1541 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1542 | NULL); | |
1543 | u16 txflags; | |
1544 | ||
1545 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1546 | IEEE80211_TX_CTL_DONTFRAG; | |
1547 | ||
1548 | /* | |
1549 | * for every radiotap entry that is present | |
1550 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1551 | * entries present, or -EINVAL on error) | |
1552 | */ | |
1553 | ||
1554 | while (!ret) { | |
1555 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1556 | ||
1557 | if (ret) | |
1558 | continue; | |
1559 | ||
1560 | /* see if this argument is something we can use */ | |
1561 | switch (iterator.this_arg_index) { | |
1562 | /* | |
1563 | * You must take care when dereferencing iterator.this_arg | |
1564 | * for multibyte types... the pointer is not aligned. Use | |
1565 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1566 | * iterator.this_arg for type "type" safely on all arches. | |
1567 | */ | |
1568 | case IEEE80211_RADIOTAP_FLAGS: | |
1569 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1570 | /* | |
1571 | * this indicates that the skb we have been | |
1572 | * handed has the 32-bit FCS CRC at the end... | |
1573 | * we should react to that by snipping it off | |
1574 | * because it will be recomputed and added | |
1575 | * on transmission | |
1576 | */ | |
1577 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1578 | return false; | |
1579 | ||
1580 | skb_trim(skb, skb->len - FCS_LEN); | |
1581 | } | |
1582 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1583 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1584 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1585 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1586 | break; | |
1587 | ||
1588 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1589 | txflags = get_unaligned_le16(iterator.this_arg); | |
1590 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1591 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1592 | break; | |
1593 | ||
1594 | /* | |
1595 | * Please update the file | |
1596 | * Documentation/networking/mac80211-injection.txt | |
1597 | * when parsing new fields here. | |
1598 | */ | |
1599 | ||
1600 | default: | |
1601 | break; | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1606 | return false; | |
1607 | ||
1608 | /* | |
1609 | * remove the radiotap header | |
1610 | * iterator->_max_length was sanity-checked against | |
1611 | * skb->len by iterator init | |
1612 | */ | |
1613 | skb_pull(skb, iterator._max_length); | |
1614 | ||
1615 | return true; | |
1616 | } | |
1617 | ||
d0cf9c0d SH |
1618 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1619 | struct net_device *dev) | |
e2ebc74d JB |
1620 | { |
1621 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 1622 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
1623 | struct ieee80211_radiotap_header *prthdr = |
1624 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1625 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1626 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1627 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 1628 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 1629 | u16 len_rthdr; |
5d9cf4a5 | 1630 | int hdrlen; |
e2ebc74d | 1631 | |
9b8a74e3 AG |
1632 | /* check for not even having the fixed radiotap header part */ |
1633 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1634 | goto fail; /* too short to be possibly valid */ | |
1635 | ||
1636 | /* is it a header version we can trust to find length from? */ | |
1637 | if (unlikely(prthdr->it_version)) | |
1638 | goto fail; /* only version 0 is supported */ | |
1639 | ||
1640 | /* then there must be a radiotap header with a length we can use */ | |
1641 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1642 | ||
1643 | /* does the skb contain enough to deliver on the alleged length? */ | |
1644 | if (unlikely(skb->len < len_rthdr)) | |
1645 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1646 | |
e2ebc74d JB |
1647 | /* |
1648 | * fix up the pointers accounting for the radiotap | |
1649 | * header still being in there. We are being given | |
1650 | * a precooked IEEE80211 header so no need for | |
1651 | * normal processing | |
1652 | */ | |
9b8a74e3 | 1653 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1654 | /* |
9b8a74e3 AG |
1655 | * these are just fixed to the end of the rt area since we |
1656 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1657 | */ |
9b8a74e3 AG |
1658 | skb_set_network_header(skb, len_rthdr); |
1659 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1660 | |
5d9cf4a5 JB |
1661 | if (skb->len < len_rthdr + 2) |
1662 | goto fail; | |
1663 | ||
1664 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1665 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1666 | ||
1667 | if (skb->len < len_rthdr + hdrlen) | |
1668 | goto fail; | |
1669 | ||
f75f5c6f HS |
1670 | /* |
1671 | * Initialize skb->protocol if the injected frame is a data frame | |
1672 | * carrying a rfc1042 header | |
1673 | */ | |
5d9cf4a5 JB |
1674 | if (ieee80211_is_data(hdr->frame_control) && |
1675 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1676 | u8 *payload = (u8 *)hdr + hdrlen; | |
1677 | ||
b203ca39 | 1678 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1679 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1680 | payload[7]); | |
f75f5c6f HS |
1681 | } |
1682 | ||
3b8d81e0 JB |
1683 | memset(info, 0, sizeof(*info)); |
1684 | ||
5d9cf4a5 | 1685 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1686 | IEEE80211_TX_CTL_INJECTED; |
1687 | ||
1688 | /* process and remove the injection radiotap header */ | |
1689 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1690 | goto fail; | |
5d9cf4a5 JB |
1691 | |
1692 | rcu_read_lock(); | |
1693 | ||
1694 | /* | |
1695 | * We process outgoing injected frames that have a local address | |
1696 | * we handle as though they are non-injected frames. | |
1697 | * This code here isn't entirely correct, the local MAC address | |
1698 | * isn't always enough to find the interface to use; for proper | |
1699 | * VLAN/WDS support we will need a different mechanism (which | |
1700 | * likely isn't going to be monitor interfaces). | |
1701 | */ | |
1702 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1703 | ||
1704 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1705 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1706 | continue; | |
1707 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1708 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1709 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1710 | continue; | |
b203ca39 | 1711 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1712 | sdata = tmp_sdata; |
1713 | break; | |
1714 | } | |
1715 | } | |
7351c6bd | 1716 | |
55de908a JB |
1717 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1718 | if (!chanctx_conf) { | |
1719 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1720 | if (tmp_sdata) | |
1721 | chanctx_conf = | |
1722 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1723 | } | |
55de908a | 1724 | |
b4a7ff75 | 1725 | if (chanctx_conf) |
b4932836 | 1726 | chandef = &chanctx_conf->def; |
b4a7ff75 | 1727 | else if (!local->use_chanctx) |
b4932836 | 1728 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
1729 | else |
1730 | goto fail_rcu; | |
55de908a JB |
1731 | |
1732 | /* | |
1733 | * Frame injection is not allowed if beaconing is not allowed | |
1734 | * or if we need radar detection. Beaconing is usually not allowed when | |
1735 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1736 | * Passive scan is also used in world regulatory domains where | |
1737 | * your country is not known and as such it should be treated as | |
1738 | * NO TX unless the channel is explicitly allowed in which case | |
1739 | * your current regulatory domain would not have the passive scan | |
1740 | * flag. | |
1741 | * | |
1742 | * Since AP mode uses monitor interfaces to inject/TX management | |
1743 | * frames we can make AP mode the exception to this rule once it | |
1744 | * supports radar detection as its implementation can deal with | |
1745 | * radar detection by itself. We can do that later by adding a | |
1746 | * monitor flag interfaces used for AP support. | |
1747 | */ | |
b4932836 JD |
1748 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
1749 | sdata->vif.type)) | |
55de908a JB |
1750 | goto fail_rcu; |
1751 | ||
b4932836 | 1752 | ieee80211_xmit(sdata, skb, chandef->chan->band); |
5d9cf4a5 JB |
1753 | rcu_read_unlock(); |
1754 | ||
e2ebc74d | 1755 | return NETDEV_TX_OK; |
9b8a74e3 | 1756 | |
55de908a JB |
1757 | fail_rcu: |
1758 | rcu_read_unlock(); | |
9b8a74e3 AG |
1759 | fail: |
1760 | dev_kfree_skb(skb); | |
1761 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1762 | } |
1763 | ||
ad38bfc9 MG |
1764 | /* |
1765 | * Measure Tx frame arrival time for Tx latency statistics calculation | |
1766 | * A single Tx frame latency should be measured from when it is entering the | |
1767 | * Kernel until we receive Tx complete confirmation indication and the skb is | |
1768 | * freed. | |
1769 | */ | |
1770 | static void ieee80211_tx_latency_start_msrmnt(struct ieee80211_local *local, | |
1771 | struct sk_buff *skb) | |
1772 | { | |
1773 | struct timespec skb_arv; | |
1774 | struct ieee80211_tx_latency_bin_ranges *tx_latency; | |
1775 | ||
1776 | tx_latency = rcu_dereference(local->tx_latency); | |
1777 | if (!tx_latency) | |
1778 | return; | |
1779 | ||
1780 | ktime_get_ts(&skb_arv); | |
1781 | skb->tstamp = ktime_set(skb_arv.tv_sec, skb_arv.tv_nsec); | |
1782 | } | |
1783 | ||
e2ebc74d JB |
1784 | /** |
1785 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1786 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1787 | * @skb: packet to be sent | |
1788 | * @dev: incoming interface | |
1789 | * | |
1790 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1791 | * not be freed, and caller is responsible for either retrying later or freeing | |
1792 | * skb). | |
1793 | * | |
1794 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1795 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1796 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1797 | * transmission (through low-level driver). | |
1798 | */ | |
d0cf9c0d SH |
1799 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1800 | struct net_device *dev) | |
e2ebc74d | 1801 | { |
133b8226 JB |
1802 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1803 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1804 | struct ieee80211_tx_info *info; |
dcf33963 | 1805 | int head_need; |
065e9605 HH |
1806 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1807 | __le16 fc; | |
e2ebc74d | 1808 | struct ieee80211_hdr hdr; |
ff67bb86 | 1809 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1810 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1811 | const u8 *encaps_data; |
1812 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1813 | int nh_pos, h_pos; |
f14543ee | 1814 | struct sta_info *sta = NULL; |
c2c98fde | 1815 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1816 | bool tdls_direct = false; |
a729cff8 JB |
1817 | bool multicast; |
1818 | u32 info_flags = 0; | |
1819 | u16 info_id = 0; | |
55de908a JB |
1820 | struct ieee80211_chanctx_conf *chanctx_conf; |
1821 | struct ieee80211_sub_if_data *ap_sdata; | |
1822 | enum ieee80211_band band; | |
e2ebc74d | 1823 | |
dcf33963 | 1824 | if (unlikely(skb->len < ETH_HLEN)) |
e2ebc74d | 1825 | goto fail; |
e2ebc74d | 1826 | |
e2ebc74d JB |
1827 | /* convert Ethernet header to proper 802.11 header (based on |
1828 | * operation mode) */ | |
1829 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1830 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1831 | |
55de908a JB |
1832 | rcu_read_lock(); |
1833 | ||
ad38bfc9 MG |
1834 | /* Measure frame arrival for Tx latency statistics calculation */ |
1835 | ieee80211_tx_latency_start_msrmnt(local, skb); | |
1836 | ||
51fb61e7 | 1837 | switch (sdata->vif.type) { |
05c914fe | 1838 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1839 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1840 | if (sta) { |
1841 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1842 | /* RA TA DA SA */ | |
1843 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1844 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1845 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1846 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1847 | hdrlen = 30; | |
c2c98fde JB |
1848 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1849 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee | 1850 | } |
55de908a JB |
1851 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1852 | u.ap); | |
1853 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
1854 | if (!chanctx_conf) | |
1855 | goto fail_rcu; | |
4bf88530 | 1856 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1857 | if (sta) |
1858 | break; | |
1859 | /* fall through */ | |
1860 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1861 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1862 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1863 | if (!chanctx_conf) | |
1864 | goto fail_rcu; | |
065e9605 | 1865 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1866 | /* DA BSSID SA */ |
1867 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1868 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1869 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1870 | hdrlen = 24; | |
4bf88530 | 1871 | band = chanctx_conf->def.chan->band; |
cf966838 | 1872 | break; |
05c914fe | 1873 | case NL80211_IFTYPE_WDS: |
065e9605 | 1874 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1875 | /* RA TA DA SA */ |
1876 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1877 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1878 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1879 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1880 | hdrlen = 30; | |
55de908a JB |
1881 | /* |
1882 | * This is the exception! WDS style interfaces are prohibited | |
1883 | * when channel contexts are in used so this must be valid | |
1884 | */ | |
675a0b04 | 1885 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 1886 | break; |
33b64eb2 | 1887 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1888 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 1889 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1890 | struct sta_info *next_hop; |
1891 | bool mpp_lookup = true; | |
1892 | ||
bf7cd94d | 1893 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1894 | if (mpath) { |
1895 | mpp_lookup = false; | |
1896 | next_hop = rcu_dereference(mpath->next_hop); | |
1897 | if (!next_hop || | |
1898 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1899 | MESH_PATH_RESOLVING))) | |
1900 | mpp_lookup = true; | |
1901 | } | |
1902 | ||
1903 | if (mpp_lookup) | |
bf7cd94d | 1904 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1905 | |
1906 | if (mppath && mpath) | |
1907 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1908 | } |
79617dee | 1909 | |
f76b57b4 | 1910 | /* |
9d52501b JF |
1911 | * Use address extension if it is a packet from |
1912 | * another interface or if we know the destination | |
1913 | * is being proxied by a portal (i.e. portal address | |
1914 | * differs from proxied address) | |
f76b57b4 | 1915 | */ |
b203ca39 JP |
1916 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1917 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1918 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1919 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1920 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1921 | NULL, NULL); | |
79617dee | 1922 | } else { |
27f01124 TP |
1923 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1924 | * For unicast with unknown forwarding information, | |
1925 | * destination might be in the MBSS or if that fails | |
1926 | * forwarded to another mesh gate. In either case | |
1927 | * resolution will be handled in ieee80211_xmit(), so | |
1928 | * leave the original DA. This also works for mcast */ | |
1929 | const u8 *mesh_da = skb->data; | |
1930 | ||
1931 | if (mppath) | |
1932 | mesh_da = mppath->mpp; | |
1933 | else if (mpath) | |
1934 | mesh_da = mpath->dst; | |
79617dee | 1935 | |
3c5772a5 | 1936 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1937 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1938 | if (is_multicast_ether_addr(mesh_da)) |
1939 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1940 | meshhdrlen = ieee80211_new_mesh_header( |
1941 | sdata, &mesh_hdr, | |
1942 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1943 | else |
27f01124 | 1944 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1945 | meshhdrlen = ieee80211_new_mesh_header( |
1946 | sdata, &mesh_hdr, skb->data, | |
1947 | skb->data + ETH_ALEN); | |
79617dee | 1948 | |
79617dee | 1949 | } |
55de908a JB |
1950 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1951 | if (!chanctx_conf) | |
1952 | goto fail_rcu; | |
4bf88530 | 1953 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1954 | break; |
1955 | #endif | |
05c914fe | 1956 | case NL80211_IFTYPE_STATION: |
941c93cd | 1957 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1958 | bool tdls_peer = false; |
1959 | ||
941c93cd | 1960 | sta = sta_info_get(sdata, skb->data); |
c2c98fde JB |
1961 | if (sta) { |
1962 | authorized = test_sta_flag(sta, | |
1963 | WLAN_STA_AUTHORIZED); | |
1964 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1965 | tdls_peer = test_sta_flag(sta, | |
1966 | WLAN_STA_TDLS_PEER); | |
1967 | tdls_auth = test_sta_flag(sta, | |
1968 | WLAN_STA_TDLS_PEER_AUTH); | |
1969 | } | |
941c93cd AN |
1970 | |
1971 | /* | |
1972 | * If the TDLS link is enabled, send everything | |
1973 | * directly. Otherwise, allow TDLS setup frames | |
1974 | * to be transmitted indirectly. | |
1975 | */ | |
c2c98fde | 1976 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1977 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1978 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1979 | } | |
1980 | ||
1981 | if (tdls_direct) { | |
1982 | /* link during setup - throw out frames to peer */ | |
dcf33963 | 1983 | if (!tdls_auth) |
55de908a | 1984 | goto fail_rcu; |
941c93cd AN |
1985 | |
1986 | /* DA SA BSSID */ | |
1987 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1988 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1989 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1990 | hdrlen = 24; | |
1991 | } else if (sdata->u.mgd.use_4addr && | |
1992 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1993 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1994 | IEEE80211_FCTL_TODS); | |
f14543ee | 1995 | /* RA TA DA SA */ |
941c93cd | 1996 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1997 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1998 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1999 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2000 | hdrlen = 30; | |
2001 | } else { | |
2002 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2003 | /* BSSID SA DA */ | |
941c93cd | 2004 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2005 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2006 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2007 | hdrlen = 24; | |
2008 | } | |
55de908a JB |
2009 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2010 | if (!chanctx_conf) | |
2011 | goto fail_rcu; | |
4bf88530 | 2012 | band = chanctx_conf->def.chan->band; |
cf966838 | 2013 | break; |
05c914fe | 2014 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2015 | /* DA SA BSSID */ |
2016 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2017 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2018 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2019 | hdrlen = 24; |
55de908a JB |
2020 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2021 | if (!chanctx_conf) | |
2022 | goto fail_rcu; | |
4bf88530 | 2023 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2024 | break; |
2025 | default: | |
55de908a | 2026 | goto fail_rcu; |
e2ebc74d JB |
2027 | } |
2028 | ||
7d185b8b JB |
2029 | /* |
2030 | * There's no need to try to look up the destination | |
2031 | * if it is a multicast address (which can only happen | |
2032 | * in AP mode) | |
2033 | */ | |
a729cff8 JB |
2034 | multicast = is_multicast_ether_addr(hdr.addr1); |
2035 | if (!multicast) { | |
abe60632 | 2036 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
2037 | if (sta) { |
2038 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2039 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
2040 | } | |
e2ebc74d JB |
2041 | } |
2042 | ||
4777be41 JC |
2043 | /* For mesh, the use of the QoS header is mandatory */ |
2044 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 2045 | wme_sta = true; |
4777be41 | 2046 | |
3434fbd3 | 2047 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 2048 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 2049 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2050 | hdrlen += 2; |
2051 | } | |
2052 | ||
2053 | /* | |
238814fd JB |
2054 | * Drop unicast frames to unauthorised stations unless they are |
2055 | * EAPOL frames from the local station. | |
ce3edf6d | 2056 | */ |
55182e4a | 2057 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
a6ececf4 | 2058 | !multicast && !authorized && |
55182e4a | 2059 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2060 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2061 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2062 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 2063 | dev->name, hdr.addr1); |
ce3edf6d JB |
2064 | #endif |
2065 | ||
2066 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2067 | ||
55de908a | 2068 | goto fail_rcu; |
ce3edf6d JB |
2069 | } |
2070 | ||
a729cff8 JB |
2071 | if (unlikely(!multicast && skb->sk && |
2072 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
2073 | struct sk_buff *orig_skb = skb; | |
2074 | ||
2075 | skb = skb_clone(skb, GFP_ATOMIC); | |
2076 | if (skb) { | |
2077 | unsigned long flags; | |
9475af6e | 2078 | int id; |
a729cff8 JB |
2079 | |
2080 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
9475af6e TH |
2081 | id = idr_alloc(&local->ack_status_frames, orig_skb, |
2082 | 1, 0x10000, GFP_ATOMIC); | |
a729cff8 JB |
2083 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2084 | ||
9475af6e | 2085 | if (id >= 0) { |
a729cff8 JB |
2086 | info_id = id; |
2087 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2088 | } else if (skb_shared(skb)) { | |
2089 | kfree_skb(orig_skb); | |
2090 | } else { | |
2091 | kfree_skb(skb); | |
2092 | skb = orig_skb; | |
2093 | } | |
2094 | } else { | |
2095 | /* couldn't clone -- lose tx status ... */ | |
2096 | skb = orig_skb; | |
2097 | } | |
2098 | } | |
2099 | ||
7e244707 HS |
2100 | /* |
2101 | * If the skb is shared we need to obtain our own copy. | |
2102 | */ | |
2103 | if (skb_shared(skb)) { | |
a729cff8 JB |
2104 | struct sk_buff *tmp_skb = skb; |
2105 | ||
2106 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2107 | WARN_ON(info_id); | |
2108 | ||
f8a0a781 | 2109 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2110 | kfree_skb(tmp_skb); |
2111 | ||
dcf33963 | 2112 | if (!skb) |
55de908a | 2113 | goto fail_rcu; |
7e244707 HS |
2114 | } |
2115 | ||
065e9605 | 2116 | hdr.frame_control = fc; |
e2ebc74d JB |
2117 | hdr.duration_id = 0; |
2118 | hdr.seq_ctrl = 0; | |
2119 | ||
2120 | skip_header_bytes = ETH_HLEN; | |
2121 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2122 | encaps_data = bridge_tunnel_header; | |
2123 | encaps_len = sizeof(bridge_tunnel_header); | |
2124 | skip_header_bytes -= 2; | |
e5c5d22e | 2125 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2126 | encaps_data = rfc1042_header; |
2127 | encaps_len = sizeof(rfc1042_header); | |
2128 | skip_header_bytes -= 2; | |
2129 | } else { | |
2130 | encaps_data = NULL; | |
2131 | encaps_len = 0; | |
2132 | } | |
2133 | ||
7e244707 HS |
2134 | nh_pos = skb_network_header(skb) - skb->data; |
2135 | h_pos = skb_transport_header(skb) - skb->data; | |
2136 | ||
e2ebc74d JB |
2137 | skb_pull(skb, skip_header_bytes); |
2138 | nh_pos -= skip_header_bytes; | |
2139 | h_pos -= skip_header_bytes; | |
2140 | ||
23c0752a | 2141 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2142 | |
23c0752a JB |
2143 | /* |
2144 | * So we need to modify the skb header and hence need a copy of | |
2145 | * that. The head_need variable above doesn't, so far, include | |
2146 | * the needed header space that we don't need right away. If we | |
2147 | * can, then we don't reallocate right now but only after the | |
2148 | * frame arrives at the master device (if it does...) | |
2149 | * | |
2150 | * If we cannot, however, then we will reallocate to include all | |
2151 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2152 | * make it big enough for everything we may ever need. | |
2153 | */ | |
e2ebc74d | 2154 | |
3a5be7d4 | 2155 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2156 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2157 | head_need += local->tx_headroom; |
2158 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2159 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2160 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2161 | skb = NULL; |
55de908a | 2162 | goto fail_rcu; |
c3e7724b | 2163 | } |
e2ebc74d JB |
2164 | } |
2165 | ||
2166 | if (encaps_data) { | |
2167 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2168 | nh_pos += encaps_len; | |
2169 | h_pos += encaps_len; | |
2170 | } | |
c29b9b9b | 2171 | |
e4ab7eb0 | 2172 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2173 | if (meshhdrlen > 0) { |
2174 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2175 | nh_pos += meshhdrlen; | |
2176 | h_pos += meshhdrlen; | |
2177 | } | |
e4ab7eb0 | 2178 | #endif |
33b64eb2 | 2179 | |
065e9605 | 2180 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2181 | __le16 *qos_control; |
2182 | ||
f359d3fe | 2183 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2184 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2185 | /* | |
2186 | * Maybe we could actually set some fields here, for now just | |
2187 | * initialise to zero to indicate no special operation. | |
2188 | */ | |
2189 | *qos_control = 0; | |
2190 | } else | |
2191 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2192 | ||
e2ebc74d JB |
2193 | nh_pos += hdrlen; |
2194 | h_pos += hdrlen; | |
2195 | ||
68aae116 SH |
2196 | dev->stats.tx_packets++; |
2197 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2198 | |
2199 | /* Update skb pointers to various headers since this modified frame | |
2200 | * is going to go through Linux networking code that may potentially | |
2201 | * need things like pointer to IP header. */ | |
2202 | skb_set_mac_header(skb, 0); | |
2203 | skb_set_network_header(skb, nh_pos); | |
2204 | skb_set_transport_header(skb, h_pos); | |
2205 | ||
489ee919 | 2206 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2207 | memset(info, 0, sizeof(*info)); |
2208 | ||
e2ebc74d | 2209 | dev->trans_start = jiffies; |
a729cff8 JB |
2210 | |
2211 | info->flags = info_flags; | |
2212 | info->ack_frame_id = info_id; | |
2213 | ||
55de908a JB |
2214 | ieee80211_xmit(sdata, skb, band); |
2215 | rcu_read_unlock(); | |
e2ebc74d | 2216 | |
ec634fe3 | 2217 | return NETDEV_TX_OK; |
e2ebc74d | 2218 | |
55de908a JB |
2219 | fail_rcu: |
2220 | rcu_read_unlock(); | |
e2ebc74d | 2221 | fail: |
dcf33963 JB |
2222 | dev_kfree_skb(skb); |
2223 | return NETDEV_TX_OK; | |
e2ebc74d JB |
2224 | } |
2225 | ||
e2ebc74d | 2226 | |
e2530083 JB |
2227 | /* |
2228 | * ieee80211_clear_tx_pending may not be called in a context where | |
2229 | * it is possible that it packets could come in again. | |
2230 | */ | |
e2ebc74d JB |
2231 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2232 | { | |
1f98ab7f | 2233 | struct sk_buff *skb; |
2de8e0d9 | 2234 | int i; |
e2ebc74d | 2235 | |
1f98ab7f FF |
2236 | for (i = 0; i < local->hw.queues; i++) { |
2237 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2238 | ieee80211_free_txskb(&local->hw, skb); | |
2239 | } | |
e2ebc74d JB |
2240 | } |
2241 | ||
7bb45683 JB |
2242 | /* |
2243 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2244 | * which in this case means re-queued -- take as an indication to stop sending | |
2245 | * more pending frames. | |
2246 | */ | |
cd8ffc80 JB |
2247 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2248 | struct sk_buff *skb) | |
2249 | { | |
2250 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2251 | struct ieee80211_sub_if_data *sdata; | |
2252 | struct sta_info *sta; | |
2253 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2254 | bool result; |
55de908a | 2255 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2256 | |
5061b0c2 | 2257 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2258 | |
2259 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2260 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2261 | if (unlikely(!chanctx_conf)) { | |
2262 | dev_kfree_skb(skb); | |
2263 | return true; | |
2264 | } | |
2265 | result = ieee80211_tx(sdata, skb, true, | |
4bf88530 | 2266 | chanctx_conf->def.chan->band); |
cd8ffc80 | 2267 | } else { |
252b86c4 JB |
2268 | struct sk_buff_head skbs; |
2269 | ||
2270 | __skb_queue_head_init(&skbs); | |
2271 | __skb_queue_tail(&skbs, skb); | |
2272 | ||
cd8ffc80 | 2273 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2274 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2275 | |
74e4dbfd | 2276 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2277 | } |
2278 | ||
cd8ffc80 JB |
2279 | return result; |
2280 | } | |
2281 | ||
e2530083 | 2282 | /* |
3b8d81e0 | 2283 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2284 | */ |
e2ebc74d JB |
2285 | void ieee80211_tx_pending(unsigned long data) |
2286 | { | |
2287 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2288 | unsigned long flags; |
cd8ffc80 | 2289 | int i; |
3b8d81e0 | 2290 | bool txok; |
e2ebc74d | 2291 | |
f0e72851 | 2292 | rcu_read_lock(); |
e2530083 | 2293 | |
3b8d81e0 | 2294 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2295 | for (i = 0; i < local->hw.queues; i++) { |
2296 | /* | |
2297 | * If queue is stopped by something other than due to pending | |
2298 | * frames, or we have no pending frames, proceed to next queue. | |
2299 | */ | |
3b8d81e0 | 2300 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2301 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2302 | continue; |
e2530083 | 2303 | |
2a577d98 | 2304 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2305 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2306 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2307 | |
a7bc376c | 2308 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2309 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2310 | continue; |
2311 | } | |
2312 | ||
3b8d81e0 JB |
2313 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2314 | flags); | |
2315 | ||
2316 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2317 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2318 | flags); | |
2319 | if (!txok) | |
2a577d98 | 2320 | break; |
e2ebc74d | 2321 | } |
7236fe29 JB |
2322 | |
2323 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2324 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2325 | } |
3b8d81e0 | 2326 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2327 | |
f0e72851 | 2328 | rcu_read_unlock(); |
e2ebc74d JB |
2329 | } |
2330 | ||
2331 | /* functions for drivers to get certain frames */ | |
2332 | ||
eac70c13 | 2333 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2334 | struct ps_data *ps, struct sk_buff *skb, |
2335 | bool is_template) | |
e2ebc74d JB |
2336 | { |
2337 | u8 *pos, *tim; | |
2338 | int aid0 = 0; | |
2339 | int i, have_bits = 0, n1, n2; | |
2340 | ||
2341 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2342 | * mode. */ | |
d012a605 | 2343 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2344 | /* in the hope that this is faster than |
2345 | * checking byte-for-byte */ | |
f359d3fe | 2346 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 2347 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
2348 | if (!is_template) { |
2349 | if (ps->dtim_count == 0) | |
2350 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
2351 | else | |
2352 | ps->dtim_count--; | |
2353 | } | |
e2ebc74d JB |
2354 | |
2355 | tim = pos = (u8 *) skb_put(skb, 6); | |
2356 | *pos++ = WLAN_EID_TIM; | |
2357 | *pos++ = 4; | |
d012a605 | 2358 | *pos++ = ps->dtim_count; |
8860020e | 2359 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2360 | |
d012a605 | 2361 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2362 | aid0 = 1; |
2363 | ||
d012a605 | 2364 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2365 | |
e2ebc74d JB |
2366 | if (have_bits) { |
2367 | /* Find largest even number N1 so that bits numbered 1 through | |
2368 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2369 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2370 | n1 = 0; | |
2371 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2372 | if (ps->tim[i]) { |
e2ebc74d JB |
2373 | n1 = i & 0xfe; |
2374 | break; | |
2375 | } | |
2376 | } | |
2377 | n2 = n1; | |
2378 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2379 | if (ps->tim[i]) { |
e2ebc74d JB |
2380 | n2 = i; |
2381 | break; | |
2382 | } | |
2383 | } | |
2384 | ||
2385 | /* Bitmap control */ | |
2386 | *pos++ = n1 | aid0; | |
2387 | /* Part Virt Bitmap */ | |
5220da39 | 2388 | skb_put(skb, n2 - n1); |
d012a605 | 2389 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2390 | |
2391 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2392 | } else { |
2393 | *pos++ = aid0; /* Bitmap control */ | |
2394 | *pos++ = 0; /* Part Virt Bitmap */ | |
2395 | } | |
e2ebc74d JB |
2396 | } |
2397 | ||
eac70c13 | 2398 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
2399 | struct ps_data *ps, struct sk_buff *skb, |
2400 | bool is_template) | |
eac70c13 MP |
2401 | { |
2402 | struct ieee80211_local *local = sdata->local; | |
2403 | ||
2404 | /* | |
2405 | * Not very nice, but we want to allow the driver to call | |
2406 | * ieee80211_beacon_get() as a response to the set_tim() | |
2407 | * callback. That, however, is already invoked under the | |
2408 | * sta_lock to guarantee consistent and race-free update | |
2409 | * of the tim bitmap in mac80211 and the driver. | |
2410 | */ | |
2411 | if (local->tim_in_locked_section) { | |
6ec8c332 | 2412 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 2413 | } else { |
1b91731d | 2414 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 2415 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 2416 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2417 | } |
2418 | ||
2419 | return 0; | |
2420 | } | |
2421 | ||
1af586c9 AO |
2422 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
2423 | struct beacon_data *beacon) | |
73da7d5b SW |
2424 | { |
2425 | struct probe_resp *resp; | |
cd7760e6 SW |
2426 | u8 *beacon_data; |
2427 | size_t beacon_data_len; | |
0d06d9ba | 2428 | int i; |
af296bdb | 2429 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
2430 | |
2431 | switch (sdata->vif.type) { | |
2432 | case NL80211_IFTYPE_AP: | |
2433 | beacon_data = beacon->tail; | |
2434 | beacon_data_len = beacon->tail_len; | |
2435 | break; | |
2436 | case NL80211_IFTYPE_ADHOC: | |
2437 | beacon_data = beacon->head; | |
2438 | beacon_data_len = beacon->head_len; | |
2439 | break; | |
b8456a14 CYY |
2440 | case NL80211_IFTYPE_MESH_POINT: |
2441 | beacon_data = beacon->head; | |
2442 | beacon_data_len = beacon->head_len; | |
2443 | break; | |
cd7760e6 SW |
2444 | default: |
2445 | return; | |
2446 | } | |
73da7d5b | 2447 | |
af296bdb | 2448 | rcu_read_lock(); |
0d06d9ba | 2449 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 2450 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 2451 | |
af296bdb MK |
2452 | if (beacon->csa_counter_offsets[i]) { |
2453 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
2454 | beacon_data_len)) { | |
0d06d9ba AO |
2455 | rcu_read_unlock(); |
2456 | return; | |
2457 | } | |
af296bdb MK |
2458 | |
2459 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 2460 | } |
af296bdb MK |
2461 | |
2462 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
2463 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 2464 | } |
af296bdb | 2465 | rcu_read_unlock(); |
1af586c9 AO |
2466 | } |
2467 | ||
2468 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) | |
2469 | { | |
2470 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
2471 | struct beacon_data *beacon = NULL; |
2472 | u8 count = 0; | |
0d06d9ba | 2473 | |
af296bdb MK |
2474 | rcu_read_lock(); |
2475 | ||
2476 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
2477 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
2478 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2479 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
2480 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
2481 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
2482 | ||
2483 | if (!beacon) | |
2484 | goto unlock; | |
2485 | ||
2486 | beacon->csa_current_counter--; | |
1af586c9 AO |
2487 | |
2488 | /* the counter should never reach 0 */ | |
af296bdb MK |
2489 | WARN_ON_ONCE(!beacon->csa_current_counter); |
2490 | count = beacon->csa_current_counter; | |
1af586c9 | 2491 | |
af296bdb MK |
2492 | unlock: |
2493 | rcu_read_unlock(); | |
2494 | return count; | |
73da7d5b | 2495 | } |
1af586c9 | 2496 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
2497 | |
2498 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
2499 | { | |
2500 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2501 | struct beacon_data *beacon = NULL; | |
2502 | u8 *beacon_data; | |
2503 | size_t beacon_data_len; | |
73da7d5b SW |
2504 | int ret = false; |
2505 | ||
2506 | if (!ieee80211_sdata_running(sdata)) | |
2507 | return false; | |
2508 | ||
2509 | rcu_read_lock(); | |
2510 | if (vif->type == NL80211_IFTYPE_AP) { | |
2511 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
2512 | ||
2513 | beacon = rcu_dereference(ap->beacon); | |
2514 | if (WARN_ON(!beacon || !beacon->tail)) | |
2515 | goto out; | |
2516 | beacon_data = beacon->tail; | |
2517 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
2518 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
2519 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
2520 | ||
2521 | beacon = rcu_dereference(ifibss->presp); | |
2522 | if (!beacon) | |
2523 | goto out; | |
2524 | ||
b8456a14 CYY |
2525 | beacon_data = beacon->head; |
2526 | beacon_data_len = beacon->head_len; | |
2527 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
2528 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
2529 | ||
2530 | beacon = rcu_dereference(ifmsh->beacon); | |
2531 | if (!beacon) | |
2532 | goto out; | |
2533 | ||
cd7760e6 SW |
2534 | beacon_data = beacon->head; |
2535 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
2536 | } else { |
2537 | WARN_ON(1); | |
2538 | goto out; | |
2539 | } | |
2540 | ||
af296bdb | 2541 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
2542 | goto out; |
2543 | ||
af296bdb | 2544 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
2545 | ret = true; |
2546 | out: | |
2547 | rcu_read_unlock(); | |
2548 | ||
2549 | return ret; | |
2550 | } | |
2551 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
2552 | ||
6ec8c332 AO |
2553 | static struct sk_buff * |
2554 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
2555 | struct ieee80211_vif *vif, | |
2556 | struct ieee80211_mutable_offsets *offs, | |
2557 | bool is_template) | |
e2ebc74d JB |
2558 | { |
2559 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 2560 | struct beacon_data *beacon = NULL; |
9d139c81 | 2561 | struct sk_buff *skb = NULL; |
e039fa4a | 2562 | struct ieee80211_tx_info *info; |
e2ebc74d | 2563 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2564 | enum ieee80211_band band; |
e00cfce0 | 2565 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2566 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 2567 | int csa_off_base = 0; |
8318d78a | 2568 | |
5dfdaf58 | 2569 | rcu_read_lock(); |
e2ebc74d | 2570 | |
32bfd35d | 2571 | sdata = vif_to_sdata(vif); |
55de908a | 2572 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2573 | |
55de908a | 2574 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2575 | goto out; |
2576 | ||
6ec8c332 AO |
2577 | if (offs) |
2578 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 2579 | |
05c914fe | 2580 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 2581 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 2582 | |
af296bdb | 2583 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 2584 | if (beacon) { |
1af586c9 AO |
2585 | if (sdata->vif.csa_active) { |
2586 | if (!is_template) | |
2587 | ieee80211_csa_update_counter(vif); | |
2588 | ||
2589 | ieee80211_set_csa(sdata, beacon); | |
2590 | } | |
73da7d5b | 2591 | |
902acc78 JB |
2592 | /* |
2593 | * headroom, head length, | |
2594 | * tail length and maximum TIM length | |
2595 | */ | |
2596 | skb = dev_alloc_skb(local->tx_headroom + | |
2597 | beacon->head_len + | |
70dabeb7 FF |
2598 | beacon->tail_len + 256 + |
2599 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
2600 | if (!skb) |
2601 | goto out; | |
33b64eb2 | 2602 | |
902acc78 JB |
2603 | skb_reserve(skb, local->tx_headroom); |
2604 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2605 | beacon->head_len); | |
33b64eb2 | 2606 | |
6ec8c332 AO |
2607 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
2608 | is_template); | |
33b64eb2 | 2609 | |
6ec8c332 AO |
2610 | if (offs) { |
2611 | offs->tim_offset = beacon->head_len; | |
2612 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
2613 | |
2614 | /* for AP the csa offsets are from tail */ | |
2615 | csa_off_base = skb->len; | |
6ec8c332 | 2616 | } |
eddcbb94 | 2617 | |
902acc78 JB |
2618 | if (beacon->tail) |
2619 | memcpy(skb_put(skb, beacon->tail_len), | |
2620 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2621 | } else |
2622 | goto out; | |
05c914fe | 2623 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2624 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2625 | struct ieee80211_hdr *hdr; |
33b64eb2 | 2626 | |
af296bdb MK |
2627 | beacon = rcu_dereference(ifibss->presp); |
2628 | if (!beacon) | |
9d139c81 JB |
2629 | goto out; |
2630 | ||
1af586c9 AO |
2631 | if (sdata->vif.csa_active) { |
2632 | if (!is_template) | |
2633 | ieee80211_csa_update_counter(vif); | |
cd7760e6 | 2634 | |
af296bdb | 2635 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2636 | } |
cd7760e6 | 2637 | |
af296bdb | 2638 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 2639 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
2640 | if (!skb) |
2641 | goto out; | |
c3ffeab4 | 2642 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2643 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2644 | beacon->head_len); | |
9d139c81 JB |
2645 | |
2646 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2647 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2648 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2649 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2650 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 2651 | |
af296bdb MK |
2652 | beacon = rcu_dereference(ifmsh->beacon); |
2653 | if (!beacon) | |
ac1bd846 | 2654 | goto out; |
ac1bd846 | 2655 | |
1af586c9 AO |
2656 | if (sdata->vif.csa_active) { |
2657 | if (!is_template) | |
2658 | /* TODO: For mesh csa_counter is in TU, so | |
2659 | * decrementing it by one isn't correct, but | |
2660 | * for now we leave it consistent with overall | |
2661 | * mac80211's behavior. | |
2662 | */ | |
2663 | ieee80211_csa_update_counter(vif); | |
2664 | ||
af296bdb | 2665 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 2666 | } |
b8456a14 | 2667 | |
dbf498fb | 2668 | if (ifmsh->sync_ops) |
af296bdb | 2669 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
dbf498fb | 2670 | |
3b69a9c5 | 2671 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 2672 | beacon->head_len + |
3f52b7e3 | 2673 | 256 + /* TIM IE */ |
af296bdb | 2674 | beacon->tail_len + |
70dabeb7 | 2675 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
2676 | if (!skb) |
2677 | goto out; | |
2b5e1967 | 2678 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
2679 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
2680 | beacon->head_len); | |
6ec8c332 AO |
2681 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
2682 | ||
2683 | if (offs) { | |
af296bdb MK |
2684 | offs->tim_offset = beacon->head_len; |
2685 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
2686 | } |
2687 | ||
af296bdb MK |
2688 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
2689 | beacon->tail_len); | |
9d139c81 JB |
2690 | } else { |
2691 | WARN_ON(1); | |
5dfdaf58 | 2692 | goto out; |
e2ebc74d JB |
2693 | } |
2694 | ||
1af586c9 | 2695 | /* CSA offsets */ |
af296bdb | 2696 | if (offs && beacon) { |
1af586c9 AO |
2697 | int i; |
2698 | ||
2699 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 2700 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
2701 | |
2702 | if (!csa_off) | |
2703 | continue; | |
2704 | ||
2705 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
2706 | } | |
2707 | } | |
2708 | ||
4bf88530 | 2709 | band = chanctx_conf->def.chan->band; |
55de908a | 2710 | |
e039fa4a JB |
2711 | info = IEEE80211_SKB_CB(skb); |
2712 | ||
3b8d81e0 | 2713 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2714 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2715 | info->band = band; |
e00cfce0 JM |
2716 | |
2717 | memset(&txrc, 0, sizeof(txrc)); | |
2718 | txrc.hw = hw; | |
e31583cd | 2719 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2720 | txrc.bss_conf = &sdata->vif.bss_conf; |
2721 | txrc.skb = skb; | |
2722 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2723 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2724 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2725 | txrc.max_rate_idx = -1; |
2726 | else | |
2727 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2728 | txrc.bss = true; |
e00cfce0 | 2729 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2730 | |
2731 | info->control.vif = vif; | |
f591fa5d | 2732 | |
a472e71b JL |
2733 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2734 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2735 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2736 | out: |
5dfdaf58 | 2737 | rcu_read_unlock(); |
e2ebc74d | 2738 | return skb; |
6ec8c332 AO |
2739 | |
2740 | } | |
2741 | ||
2742 | struct sk_buff * | |
2743 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
2744 | struct ieee80211_vif *vif, | |
2745 | struct ieee80211_mutable_offsets *offs) | |
2746 | { | |
2747 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
2748 | } | |
2749 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
2750 | ||
2751 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
2752 | struct ieee80211_vif *vif, | |
2753 | u16 *tim_offset, u16 *tim_length) | |
2754 | { | |
2755 | struct ieee80211_mutable_offsets offs = {}; | |
2756 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
2757 | ||
2758 | if (tim_offset) | |
2759 | *tim_offset = offs.tim_offset; | |
2760 | ||
2761 | if (tim_length) | |
2762 | *tim_length = offs.tim_length; | |
2763 | ||
2764 | return bcn; | |
e2ebc74d | 2765 | } |
eddcbb94 | 2766 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2767 | |
02945821 AN |
2768 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2769 | struct ieee80211_vif *vif) | |
2770 | { | |
2771 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2772 | struct sk_buff *skb = NULL; |
2773 | struct probe_resp *presp = NULL; | |
02945821 AN |
2774 | struct ieee80211_hdr *hdr; |
2775 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2776 | ||
2777 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2778 | return NULL; | |
2779 | ||
2780 | rcu_read_lock(); | |
2781 | ||
2782 | ap = &sdata->u.ap; | |
2783 | presp = rcu_dereference(ap->probe_resp); | |
2784 | if (!presp) | |
2785 | goto out; | |
2786 | ||
aa7a0080 | 2787 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2788 | if (!skb) |
2789 | goto out; | |
2790 | ||
aa7a0080 ES |
2791 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2792 | ||
02945821 AN |
2793 | hdr = (struct ieee80211_hdr *) skb->data; |
2794 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2795 | ||
2796 | out: | |
2797 | rcu_read_unlock(); | |
2798 | return skb; | |
2799 | } | |
2800 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2801 | ||
7044cc56 KV |
2802 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2803 | struct ieee80211_vif *vif) | |
2804 | { | |
2805 | struct ieee80211_sub_if_data *sdata; | |
2806 | struct ieee80211_if_managed *ifmgd; | |
2807 | struct ieee80211_pspoll *pspoll; | |
2808 | struct ieee80211_local *local; | |
2809 | struct sk_buff *skb; | |
2810 | ||
2811 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2812 | return NULL; | |
2813 | ||
2814 | sdata = vif_to_sdata(vif); | |
2815 | ifmgd = &sdata->u.mgd; | |
2816 | local = sdata->local; | |
2817 | ||
2818 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2819 | if (!skb) |
7044cc56 | 2820 | return NULL; |
d15b8459 | 2821 | |
7044cc56 KV |
2822 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2823 | ||
2824 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2825 | memset(pspoll, 0, sizeof(*pspoll)); | |
2826 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2827 | IEEE80211_STYPE_PSPOLL); | |
2828 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2829 | ||
2830 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2831 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2832 | ||
2833 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2834 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2835 | ||
2836 | return skb; | |
2837 | } | |
2838 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2839 | ||
2840 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2841 | struct ieee80211_vif *vif) | |
2842 | { | |
2843 | struct ieee80211_hdr_3addr *nullfunc; | |
2844 | struct ieee80211_sub_if_data *sdata; | |
2845 | struct ieee80211_if_managed *ifmgd; | |
2846 | struct ieee80211_local *local; | |
2847 | struct sk_buff *skb; | |
2848 | ||
2849 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2850 | return NULL; | |
2851 | ||
2852 | sdata = vif_to_sdata(vif); | |
2853 | ifmgd = &sdata->u.mgd; | |
2854 | local = sdata->local; | |
2855 | ||
2856 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2857 | if (!skb) |
7044cc56 | 2858 | return NULL; |
d15b8459 | 2859 | |
7044cc56 KV |
2860 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2861 | ||
2862 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2863 | sizeof(*nullfunc)); | |
2864 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2865 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2866 | IEEE80211_STYPE_NULLFUNC | | |
2867 | IEEE80211_FCTL_TODS); | |
2868 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2869 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2870 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2871 | ||
2872 | return skb; | |
2873 | } | |
2874 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2875 | ||
05e54ea6 KV |
2876 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2877 | struct ieee80211_vif *vif, | |
2878 | const u8 *ssid, size_t ssid_len, | |
b9a9ada1 | 2879 | size_t tailroom) |
05e54ea6 KV |
2880 | { |
2881 | struct ieee80211_sub_if_data *sdata; | |
2882 | struct ieee80211_local *local; | |
2883 | struct ieee80211_hdr_3addr *hdr; | |
2884 | struct sk_buff *skb; | |
2885 | size_t ie_ssid_len; | |
2886 | u8 *pos; | |
2887 | ||
2888 | sdata = vif_to_sdata(vif); | |
2889 | local = sdata->local; | |
2890 | ie_ssid_len = 2 + ssid_len; | |
2891 | ||
2892 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2893 | ie_ssid_len + tailroom); |
d15b8459 | 2894 | if (!skb) |
05e54ea6 | 2895 | return NULL; |
05e54ea6 KV |
2896 | |
2897 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2898 | ||
2899 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2900 | memset(hdr, 0, sizeof(*hdr)); | |
2901 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2902 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 2903 | eth_broadcast_addr(hdr->addr1); |
05e54ea6 | 2904 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
e83e6541 | 2905 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
2906 | |
2907 | pos = skb_put(skb, ie_ssid_len); | |
2908 | *pos++ = WLAN_EID_SSID; | |
2909 | *pos++ = ssid_len; | |
88c868c4 | 2910 | if (ssid_len) |
05e54ea6 KV |
2911 | memcpy(pos, ssid, ssid_len); |
2912 | pos += ssid_len; | |
2913 | ||
05e54ea6 KV |
2914 | return skb; |
2915 | } | |
2916 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2917 | ||
32bfd35d | 2918 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2919 | const void *frame, size_t frame_len, |
e039fa4a | 2920 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2921 | struct ieee80211_rts *rts) |
2922 | { | |
2923 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2924 | |
065e9605 HH |
2925 | rts->frame_control = |
2926 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2927 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2928 | frame_txctl); | |
e2ebc74d JB |
2929 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2930 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2931 | } | |
2932 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2933 | ||
32bfd35d | 2934 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2935 | const void *frame, size_t frame_len, |
e039fa4a | 2936 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2937 | struct ieee80211_cts *cts) |
2938 | { | |
2939 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2940 | |
065e9605 HH |
2941 | cts->frame_control = |
2942 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2943 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2944 | frame_len, frame_txctl); | |
e2ebc74d JB |
2945 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2946 | } | |
2947 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2948 | ||
2949 | struct sk_buff * | |
32bfd35d | 2950 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2951 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2952 | { |
2953 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2954 | struct sk_buff *skb = NULL; |
5cf121c3 | 2955 | struct ieee80211_tx_data tx; |
e2ebc74d | 2956 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 2957 | struct ps_data *ps; |
e039fa4a | 2958 | struct ieee80211_tx_info *info; |
55de908a | 2959 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 2960 | |
32bfd35d | 2961 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 2962 | |
5dfdaf58 | 2963 | rcu_read_lock(); |
55de908a | 2964 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 2965 | |
d012a605 MP |
2966 | if (!chanctx_conf) |
2967 | goto out; | |
2968 | ||
2969 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
2970 | struct beacon_data *beacon = | |
2971 | rcu_dereference(sdata->u.ap.beacon); | |
2972 | ||
2973 | if (!beacon || !beacon->head) | |
2974 | goto out; | |
2975 | ||
2976 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
2977 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2978 | ps = &sdata->u.mesh.ps; | |
d012a605 | 2979 | } else { |
747cf5e9 | 2980 | goto out; |
d012a605 | 2981 | } |
5dfdaf58 | 2982 | |
d012a605 | 2983 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 2984 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2985 | |
e2ebc74d | 2986 | while (1) { |
d012a605 | 2987 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 2988 | if (!skb) |
747cf5e9 | 2989 | goto out; |
e2ebc74d JB |
2990 | local->total_ps_buffered--; |
2991 | ||
d012a605 | 2992 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
2993 | struct ieee80211_hdr *hdr = |
2994 | (struct ieee80211_hdr *) skb->data; | |
2995 | /* more buffered multicast/broadcast frames ==> set | |
2996 | * MoreData flag in IEEE 802.11 header to inform PS | |
2997 | * STAs */ | |
2998 | hdr->frame_control |= | |
2999 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3000 | } | |
3001 | ||
112c44b2 | 3002 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 3003 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
3b8d81e0 | 3004 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
3005 | break; |
3006 | dev_kfree_skb_any(skb); | |
3007 | } | |
e039fa4a JB |
3008 | |
3009 | info = IEEE80211_SKB_CB(skb); | |
3010 | ||
5cf121c3 | 3011 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 3012 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 3013 | |
97b045d6 | 3014 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 3015 | skb = NULL; |
97b045d6 | 3016 | out: |
d0709a65 | 3017 | rcu_read_unlock(); |
e2ebc74d JB |
3018 | |
3019 | return skb; | |
3020 | } | |
3021 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 3022 | |
55de908a JB |
3023 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
3024 | struct sk_buff *skb, int tid, | |
3025 | enum ieee80211_band band) | |
3b8d81e0 | 3026 | { |
353d09c6 | 3027 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 3028 | |
3b8d81e0 JB |
3029 | skb_set_mac_header(skb, 0); |
3030 | skb_set_network_header(skb, 0); | |
3031 | skb_set_transport_header(skb, 0); | |
3032 | ||
3a25a8c8 | 3033 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 3034 | skb->priority = tid; |
cf0277e7 | 3035 | |
89afe614 JB |
3036 | skb->dev = sdata->dev; |
3037 | ||
3d34deb6 JB |
3038 | /* |
3039 | * The other path calling ieee80211_xmit is from the tasklet, | |
3040 | * and while we can handle concurrent transmissions locking | |
3041 | * requirements are that we do not come into tx with bhs on. | |
3042 | */ | |
3043 | local_bh_disable(); | |
55de908a | 3044 | ieee80211_xmit(sdata, skb, band); |
3d34deb6 | 3045 | local_bh_enable(); |
3b8d81e0 | 3046 | } |