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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> |
881d966b | 22 | #include <net/net_namespace.h> |
e2ebc74d JB |
23 | #include <net/ieee80211_radiotap.h> |
24 | #include <net/cfg80211.h> | |
25 | #include <net/mac80211.h> | |
26 | #include <asm/unaligned.h> | |
27 | ||
28 | #include "ieee80211_i.h" | |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 | 30 | #include "led.h" |
33b64eb2 | 31 | #include "mesh.h" |
e2ebc74d JB |
32 | #include "wep.h" |
33 | #include "wpa.h" | |
34 | #include "wme.h" | |
2c8dccc7 | 35 | #include "rate.h" |
e2ebc74d | 36 | |
e2ebc74d JB |
37 | /* misc utils */ |
38 | ||
252b86c4 JB |
39 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
40 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 41 | int next_frag_len) |
e2ebc74d | 42 | { |
2103dec1 | 43 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 44 | struct ieee80211_rate *txrate; |
e2ebc74d | 45 | struct ieee80211_local *local = tx->local; |
8318d78a | 46 | struct ieee80211_supported_band *sband; |
358c8d9d | 47 | struct ieee80211_hdr *hdr; |
252b86c4 | 48 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
49 | struct ieee80211_chanctx_conf *chanctx_conf; |
50 | u32 rate_flags = 0; | |
51 | ||
52 | rcu_read_lock(); | |
53 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
54 | if (chanctx_conf) { | |
55 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
56 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
57 | } | |
58 | rcu_read_unlock(); | |
e6a9854b JB |
59 | |
60 | /* assume HW handles this */ | |
0d528d85 | 61 | if (tx->rate.flags & IEEE80211_TX_RC_MCS) |
e6a9854b JB |
62 | return 0; |
63 | ||
64 | /* uh huh? */ | |
0d528d85 | 65 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 66 | return 0; |
e2ebc74d | 67 | |
2d56577b | 68 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 69 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 70 | |
e6a9854b | 71 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
72 | |
73 | /* | |
74 | * data and mgmt (except PS Poll): | |
75 | * - during CFP: 32768 | |
76 | * - during contention period: | |
77 | * if addr1 is group address: 0 | |
78 | * if more fragments = 0 and addr1 is individual address: time to | |
79 | * transmit one ACK plus SIFS | |
80 | * if more fragments = 1 and addr1 is individual address: time to | |
81 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
82 | * | |
83 | * IEEE 802.11, 9.6: | |
84 | * - control response frame (CTS or ACK) shall be transmitted using the | |
85 | * same rate as the immediately previous frame in the frame exchange | |
86 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
87 | * at the highest possible rate belonging to the PHY rates in the | |
88 | * BSSBasicRateSet | |
89 | */ | |
252b86c4 | 90 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 91 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 92 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 93 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
94 | * needs to be updated to support duration field calculation. |
95 | * | |
96 | * RTS: time needed to transmit pending data/mgmt frame plus | |
97 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
98 | * CTS: duration of immediately previous RTS minus time | |
99 | * required to transmit CTS and its SIFS | |
100 | * ACK: 0 if immediately previous directed data/mgmt had | |
101 | * more=0, with more=1 duration in ACK frame is duration | |
102 | * from previous frame minus time needed to transmit ACK | |
103 | * and its SIFS | |
104 | * PS Poll: BIT(15) | BIT(14) | aid | |
105 | */ | |
106 | return 0; | |
107 | } | |
108 | ||
109 | /* data/mgmt */ | |
110 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 111 | return cpu_to_le16(32768); |
e2ebc74d JB |
112 | |
113 | if (group_addr) /* Group address as the destination - no ACK */ | |
114 | return 0; | |
115 | ||
116 | /* Individual destination address: | |
117 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
118 | * CTS and ACK frames shall be transmitted using the highest rate in | |
119 | * basic rate set that is less than or equal to the rate of the | |
120 | * immediately previous frame and that is using the same modulation | |
121 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
122 | * the highest mandatory rate of the PHY that is less than or equal to | |
123 | * the rate of the previous frame is used. | |
124 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
125 | */ | |
126 | rate = -1; | |
8318d78a JB |
127 | /* use lowest available if everything fails */ |
128 | mrate = sband->bitrates[0].bitrate; | |
129 | for (i = 0; i < sband->n_bitrates; i++) { | |
130 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 131 | |
8318d78a JB |
132 | if (r->bitrate > txrate->bitrate) |
133 | break; | |
e2ebc74d | 134 | |
2103dec1 SW |
135 | if ((rate_flags & r->flags) != rate_flags) |
136 | continue; | |
137 | ||
bda3933a | 138 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 139 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
140 | |
141 | switch (sband->band) { | |
142 | case IEEE80211_BAND_2GHZ: { | |
143 | u32 flag; | |
144 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
145 | flag = IEEE80211_RATE_MANDATORY_G; | |
146 | else | |
147 | flag = IEEE80211_RATE_MANDATORY_B; | |
148 | if (r->flags & flag) | |
149 | mrate = r->bitrate; | |
150 | break; | |
151 | } | |
152 | case IEEE80211_BAND_5GHZ: | |
153 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
154 | mrate = r->bitrate; | |
155 | break; | |
3a0c52a6 VK |
156 | case IEEE80211_BAND_60GHZ: |
157 | /* TODO, for now fall through */ | |
8318d78a JB |
158 | case IEEE80211_NUM_BANDS: |
159 | WARN_ON(1); | |
160 | break; | |
161 | } | |
e2ebc74d JB |
162 | } |
163 | if (rate == -1) { | |
164 | /* No matching basic rate found; use highest suitable mandatory | |
165 | * PHY rate */ | |
2103dec1 | 166 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
167 | } |
168 | ||
6674f210 SW |
169 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
170 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 171 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
172 | dur = 0; |
173 | else | |
174 | /* Time needed to transmit ACK | |
175 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
176 | * to closest integer */ | |
4ee73f33 | 177 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
178 | tx->sdata->vif.bss_conf.use_short_preamble, |
179 | shift); | |
e2ebc74d JB |
180 | |
181 | if (next_frag_len) { | |
182 | /* Frame is fragmented: duration increases with time needed to | |
183 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
184 | dur *= 2; /* ACK + SIFS */ | |
185 | /* next fragment */ | |
4ee73f33 | 186 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 187 | txrate->bitrate, erp, |
438b61b7 SW |
188 | tx->sdata->vif.bss_conf.use_short_preamble, |
189 | shift); | |
e2ebc74d JB |
190 | } |
191 | ||
03f93c3d | 192 | return cpu_to_le16(dur); |
e2ebc74d JB |
193 | } |
194 | ||
e2ebc74d | 195 | /* tx handlers */ |
5c1b98a5 KV |
196 | static ieee80211_tx_result debug_noinline |
197 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
198 | { | |
199 | struct ieee80211_local *local = tx->local; | |
0c74211d | 200 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
201 | |
202 | /* driver doesn't support power save */ | |
203 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
204 | return TX_CONTINUE; | |
205 | ||
206 | /* hardware does dynamic power save */ | |
207 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
208 | return TX_CONTINUE; | |
209 | ||
210 | /* dynamic power save disabled */ | |
211 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
212 | return TX_CONTINUE; | |
213 | ||
214 | /* we are scanning, don't enable power save */ | |
215 | if (local->scanning) | |
216 | return TX_CONTINUE; | |
217 | ||
218 | if (!local->ps_sdata) | |
219 | return TX_CONTINUE; | |
220 | ||
221 | /* No point if we're going to suspend */ | |
222 | if (local->quiescing) | |
223 | return TX_CONTINUE; | |
224 | ||
0c74211d KV |
225 | /* dynamic ps is supported only in managed mode */ |
226 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
227 | return TX_CONTINUE; | |
228 | ||
229 | ifmgd = &tx->sdata->u.mgd; | |
230 | ||
231 | /* | |
232 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
233 | * u-apsd enabled and the frame is in voip class. This effectively | |
234 | * means that even if all access categories have u-apsd enabled, in | |
235 | * practise u-apsd is only used with the voip ac. This is a | |
236 | * workaround for the case when received voip class packets do not | |
237 | * have correct qos tag for some reason, due the network or the | |
238 | * peer application. | |
239 | * | |
dc41e4d4 | 240 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
241 | * changed via debugfs, user needs to reassociate manually to have |
242 | * everything in sync. | |
243 | */ | |
4875d30d JB |
244 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
245 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
246 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
247 | return TX_CONTINUE; |
248 | ||
5c1b98a5 KV |
249 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
250 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 251 | IEEE80211_MAX_QUEUE_MAP, |
5c1b98a5 | 252 | IEEE80211_QUEUE_STOP_REASON_PS); |
db28569a | 253 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
254 | ieee80211_queue_work(&local->hw, |
255 | &local->dynamic_ps_disable_work); | |
256 | } | |
257 | ||
5db1c07c LC |
258 | /* Don't restart the timer if we're not disassociated */ |
259 | if (!ifmgd->associated) | |
260 | return TX_CONTINUE; | |
261 | ||
5c1b98a5 KV |
262 | mod_timer(&local->dynamic_ps_timer, jiffies + |
263 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
264 | ||
265 | return TX_CONTINUE; | |
266 | } | |
e2ebc74d | 267 | |
d9e8a70f | 268 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 269 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 270 | { |
358c8d9d | 271 | |
e039fa4a | 272 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 273 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 274 | bool assoc = false; |
e2ebc74d | 275 | |
e039fa4a | 276 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 277 | return TX_CONTINUE; |
58d4185e | 278 | |
b23b025f BG |
279 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
280 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
281 | !ieee80211_is_probe_req(hdr->frame_control) && |
282 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
283 | /* | |
284 | * When software scanning only nullfunc frames (to notify | |
285 | * the sleep state to the AP) and probe requests (for the | |
286 | * active scan) are allowed, all other frames should not be | |
287 | * sent and we should not get here, but if we do | |
288 | * nonetheless, drop them to avoid sending them | |
289 | * off-channel. See the link below and | |
290 | * ieee80211_start_scan() for more. | |
291 | * | |
292 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
293 | */ | |
9ae54c84 | 294 | return TX_DROP; |
e2ebc74d | 295 | |
1be7fe8d BJ |
296 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
297 | return TX_CONTINUE; | |
298 | ||
05c914fe | 299 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
300 | return TX_CONTINUE; |
301 | ||
5cf121c3 | 302 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 303 | return TX_CONTINUE; |
e2ebc74d | 304 | |
c2c98fde JB |
305 | if (tx->sta) |
306 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 307 | |
5cf121c3 | 308 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 309 | if (unlikely(!assoc && |
358c8d9d | 310 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 311 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
312 | sdata_info(tx->sdata, |
313 | "dropped data frame to not associated station %pM\n", | |
314 | hdr->addr1); | |
315 | #endif | |
e2ebc74d | 316 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 317 | return TX_DROP; |
e2ebc74d | 318 | } |
29623892 JB |
319 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
320 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 321 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
322 | /* |
323 | * No associated STAs - no need to send multicast | |
324 | * frames. | |
325 | */ | |
326 | return TX_DROP; | |
e2ebc74d JB |
327 | } |
328 | ||
9ae54c84 | 329 | return TX_CONTINUE; |
e2ebc74d JB |
330 | } |
331 | ||
e2ebc74d JB |
332 | /* This function is called whenever the AP is about to exceed the maximum limit |
333 | * of buffered frames for power saving STAs. This situation should not really | |
334 | * happen often during normal operation, so dropping the oldest buffered packet | |
335 | * from each queue should be OK to make some room for new frames. */ | |
336 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
337 | { | |
338 | int total = 0, purged = 0; | |
339 | struct sk_buff *skb; | |
340 | struct ieee80211_sub_if_data *sdata; | |
341 | struct sta_info *sta; | |
342 | ||
79010420 | 343 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
344 | struct ps_data *ps; |
345 | ||
346 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
347 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
348 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
349 | ps = &sdata->u.mesh.ps; | |
d012a605 | 350 | else |
e2ebc74d | 351 | continue; |
d012a605 MP |
352 | |
353 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
354 | if (skb) { |
355 | purged++; | |
356 | dev_kfree_skb(skb); | |
357 | } | |
d012a605 | 358 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 359 | } |
e2ebc74d | 360 | |
948d887d JB |
361 | /* |
362 | * Drop one frame from each station from the lowest-priority | |
363 | * AC that has frames at all. | |
364 | */ | |
d0709a65 | 365 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
366 | int ac; |
367 | ||
368 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
369 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
370 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
371 | if (skb) { | |
372 | purged++; | |
c3e7724b | 373 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
374 | break; |
375 | } | |
e2ebc74d | 376 | } |
e2ebc74d | 377 | } |
d0709a65 | 378 | |
e2ebc74d | 379 | local->total_ps_buffered = total; |
bdcbd8e0 | 380 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
381 | } |
382 | ||
9ae54c84 | 383 | static ieee80211_tx_result |
5cf121c3 | 384 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 385 | { |
e039fa4a | 386 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 387 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 388 | struct ps_data *ps; |
e039fa4a | 389 | |
7d54d0dd JB |
390 | /* |
391 | * broadcast/multicast frame | |
392 | * | |
3f52b7e3 | 393 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
394 | * the frame is buffered to be sent after DTIM beacon frame. |
395 | * This is done either by the hardware or us. | |
396 | */ | |
397 | ||
3f52b7e3 | 398 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
399 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
400 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
401 | if (!tx->sdata->bss) | |
402 | return TX_CONTINUE; | |
403 | ||
404 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
405 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
406 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 407 | } else { |
3e122be0 | 408 | return TX_CONTINUE; |
d012a605 MP |
409 | } |
410 | ||
3e122be0 JB |
411 | |
412 | /* no buffering for ordered frames */ | |
358c8d9d | 413 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 414 | return TX_CONTINUE; |
7d54d0dd | 415 | |
f4d57941 JB |
416 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
417 | info->hw_queue = tx->sdata->vif.cab_queue; | |
418 | ||
7d54d0dd | 419 | /* no stations in PS mode */ |
d012a605 | 420 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 421 | return TX_CONTINUE; |
7d54d0dd | 422 | |
62b517cb | 423 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 424 | |
62b517cb JB |
425 | /* device releases frame after DTIM beacon */ |
426 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 427 | return TX_CONTINUE; |
62b1208e | 428 | |
7d54d0dd | 429 | /* buffered in mac80211 */ |
62b1208e JB |
430 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
431 | purge_old_ps_buffers(tx->local); | |
432 | ||
d012a605 | 433 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
434 | ps_dbg(tx->sdata, |
435 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 436 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
437 | } else |
438 | tx->local->total_ps_buffered++; | |
e2ebc74d | 439 | |
d012a605 | 440 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 441 | |
62b1208e | 442 | return TX_QUEUED; |
e2ebc74d JB |
443 | } |
444 | ||
fb733336 JM |
445 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
446 | struct sk_buff *skb) | |
447 | { | |
448 | if (!ieee80211_is_mgmt(fc)) | |
449 | return 0; | |
450 | ||
c2c98fde | 451 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
452 | return 0; |
453 | ||
454 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
455 | skb->data)) | |
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); |
358c8d9d | 466 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 467 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 468 | |
02f2f1a9 | 469 | if (unlikely(!sta)) |
9ae54c84 | 470 | return TX_CONTINUE; |
e2ebc74d | 471 | |
c2c98fde JB |
472 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
473 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && | |
02f2f1a9 | 474 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
475 | int ac = skb_get_queue_mapping(tx->skb); |
476 | ||
02f2f1a9 JB |
477 | /* only deauth, disassoc and action are bufferable MMPDUs */ |
478 | if (ieee80211_is_mgmt(hdr->frame_control) && | |
479 | !ieee80211_is_deauth(hdr->frame_control) && | |
480 | !ieee80211_is_disassoc(hdr->frame_control) && | |
481 | !ieee80211_is_action(hdr->frame_control)) { | |
482 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
483 | return TX_CONTINUE; | |
484 | } | |
485 | ||
bdcbd8e0 JB |
486 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
487 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
488 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
489 | purge_old_ps_buffers(tx->local); | |
948d887d JB |
490 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
491 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
492 | ps_dbg(tx->sdata, |
493 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
494 | sta->sta.addr, ac); | |
c3e7724b | 495 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
496 | } else |
497 | tx->local->total_ps_buffered++; | |
004c872e | 498 | |
e039fa4a | 499 | info->control.jiffies = jiffies; |
5061b0c2 | 500 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 501 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
948d887d | 502 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
3393a608 JO |
503 | |
504 | if (!timer_pending(&local->sta_cleanup)) | |
505 | mod_timer(&local->sta_cleanup, | |
506 | round_jiffies(jiffies + | |
507 | STA_INFO_CLEANUP_INTERVAL)); | |
508 | ||
c868cb35 JB |
509 | /* |
510 | * We queued up some frames, so the TIM bit might | |
511 | * need to be set, recalculate it. | |
512 | */ | |
513 | sta_info_recalc_tim(sta); | |
514 | ||
9ae54c84 | 515 | return TX_QUEUED; |
bdcbd8e0 JB |
516 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
517 | ps_dbg(tx->sdata, | |
518 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
519 | sta->sta.addr); | |
e2ebc74d | 520 | } |
e2ebc74d | 521 | |
9ae54c84 | 522 | return TX_CONTINUE; |
e2ebc74d JB |
523 | } |
524 | ||
d9e8a70f | 525 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 526 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 527 | { |
5cf121c3 | 528 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 529 | return TX_CONTINUE; |
e2ebc74d | 530 | |
5cf121c3 | 531 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
532 | return ieee80211_tx_h_unicast_ps_buf(tx); |
533 | else | |
534 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
535 | } | |
536 | ||
a621fa4d JB |
537 | static ieee80211_tx_result debug_noinline |
538 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
539 | { | |
540 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
541 | ||
542 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
543 | tx->sdata->control_port_no_encrypt)) | |
544 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
545 | ||
546 | return TX_CONTINUE; | |
547 | } | |
548 | ||
d9e8a70f | 549 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 550 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 551 | { |
46e6de15 | 552 | struct ieee80211_key *key; |
e039fa4a | 553 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 554 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 555 | |
3b8d81e0 | 556 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 557 | tx->key = NULL; |
e31b8213 | 558 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 559 | tx->key = key; |
3cfcf6ac | 560 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
561 | is_multicast_ether_addr(hdr->addr1) && |
562 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
563 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
564 | tx->key = key; | |
f7e0104c JB |
565 | else if (is_multicast_ether_addr(hdr->addr1) && |
566 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
567 | tx->key = key; | |
568 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
569 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 570 | tx->key = key; |
46e6de15 JB |
571 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
572 | tx->key = NULL; | |
573 | else if (!tx->sdata->drop_unencrypted) | |
574 | tx->key = NULL; | |
575 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
576 | tx->key = NULL; | |
577 | else if (ieee80211_is_robust_mgmt_frame(hdr) && | |
578 | !(ieee80211_is_action(hdr->frame_control) && | |
579 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
580 | tx->key = NULL; | |
4922f71f NC |
581 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
582 | !ieee80211_is_robust_mgmt_frame(hdr)) | |
583 | tx->key = NULL; | |
46e6de15 | 584 | else { |
e2ebc74d | 585 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 586 | return TX_DROP; |
46e6de15 | 587 | } |
e2ebc74d JB |
588 | |
589 | if (tx->key) { | |
813d7669 JB |
590 | bool skip_hw = false; |
591 | ||
e2ebc74d | 592 | tx->key->tx_rx_count++; |
011bfcc4 | 593 | /* TODO: add threshold stuff again */ |
176e4f84 | 594 | |
97359d12 JB |
595 | switch (tx->key->conf.cipher) { |
596 | case WLAN_CIPHER_SUITE_WEP40: | |
597 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 598 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 599 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
600 | tx->key = NULL; |
601 | break; | |
97359d12 | 602 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
603 | if (!ieee80211_is_data_present(hdr->frame_control) && |
604 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
605 | tx->skb)) | |
606 | tx->key = NULL; | |
3b43a187 KV |
607 | else |
608 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 609 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 610 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 611 | break; |
97359d12 | 612 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
613 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
614 | tx->key = NULL; | |
615 | break; | |
176e4f84 | 616 | } |
813d7669 | 617 | |
e54faf29 JB |
618 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
619 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
620 | return TX_DROP; |
621 | ||
f12553eb | 622 | if (!skip_hw && tx->key && |
382b1655 | 623 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 624 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
625 | } |
626 | ||
9ae54c84 | 627 | return TX_CONTINUE; |
e2ebc74d JB |
628 | } |
629 | ||
d9e8a70f | 630 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 631 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 632 | { |
e039fa4a | 633 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
634 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
635 | struct ieee80211_supported_band *sband; | |
a2c40249 | 636 | u32 len; |
e6a9854b | 637 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 638 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 639 | bool assoc = false; |
8318d78a | 640 | |
e6a9854b | 641 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 642 | |
2d56577b | 643 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 644 | |
a2c40249 | 645 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 646 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
647 | |
648 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 649 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
650 | txrc.sband = sband; |
651 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
652 | txrc.skb = tx->skb; | |
653 | txrc.reported_rate.idx = -1; | |
2d56577b | 654 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
655 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
656 | txrc.max_rate_idx = -1; | |
657 | else | |
658 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
659 | |
660 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
661 | txrc.rate_idx_mcs_mask = | |
662 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
663 | ||
8f0729b1 | 664 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 665 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 666 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
667 | |
668 | /* set up RTS protection if desired */ | |
b9a5f8ca | 669 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 670 | txrc.rts = true; |
e2ebc74d | 671 | } |
e2ebc74d | 672 | |
0d528d85 | 673 | info->control.use_rts = txrc.rts; |
991fec09 FF |
674 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
675 | ||
e6a9854b JB |
676 | /* |
677 | * Use short preamble if the BSS can handle it, but not for | |
678 | * management frames unless we know the receiver can handle | |
679 | * that -- the management frame might be to a station that | |
680 | * just wants a probe response. | |
681 | */ | |
682 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
683 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 684 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
685 | txrc.short_preamble = true; |
686 | ||
687 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 688 | |
c2c98fde JB |
689 | if (tx->sta) |
690 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
691 | |
692 | /* | |
693 | * Lets not bother rate control if we're associated and cannot | |
694 | * talk to the sta. This should not happen. | |
695 | */ | |
c2c98fde | 696 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
697 | !rate_usable_index_exists(sband, &tx->sta->sta), |
698 | "%s: Dropped data frame as no usable bitrate found while " | |
699 | "scanning and associated. Target station: " | |
700 | "%pM on %d GHz band\n", | |
47846c9b | 701 | tx->sdata->name, hdr->addr1, |
2d56577b | 702 | info->band ? 5 : 2)) |
b770b43e | 703 | return TX_DROP; |
2e92e6f2 | 704 | |
b770b43e LR |
705 | /* |
706 | * If we're associated with the sta at this point we know we can at | |
707 | * least send the frame at the lowest bit rate. | |
708 | */ | |
e6a9854b JB |
709 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
710 | ||
0d528d85 FF |
711 | if (tx->sta && !info->control.skip_table) |
712 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
713 | ||
714 | if (unlikely(info->control.rates[0].idx < 0)) { | |
715 | if (ratetbl) { | |
716 | struct ieee80211_tx_rate rate = { | |
717 | .idx = ratetbl->rate[0].idx, | |
718 | .flags = ratetbl->rate[0].flags, | |
719 | .count = ratetbl->rate[0].count | |
720 | }; | |
721 | ||
722 | if (ratetbl->rate[0].idx < 0) | |
723 | return TX_DROP; | |
724 | ||
725 | tx->rate = rate; | |
726 | } else { | |
727 | return TX_DROP; | |
728 | } | |
729 | } else { | |
730 | tx->rate = info->control.rates[0]; | |
731 | } | |
e6a9854b | 732 | |
c1ce5a74 | 733 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 734 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
735 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
736 | tx->sta->last_tx_rate = txrc.reported_rate; | |
737 | } else if (tx->sta) | |
e6a9854b | 738 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 739 | |
0d528d85 FF |
740 | if (ratetbl) |
741 | return TX_CONTINUE; | |
742 | ||
e6a9854b JB |
743 | if (unlikely(!info->control.rates[0].count)) |
744 | info->control.rates[0].count = 1; | |
e2ebc74d | 745 | |
9955151d GS |
746 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
747 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
748 | info->control.rates[0].count = 1; | |
749 | ||
e6a9854b JB |
750 | return TX_CONTINUE; |
751 | } | |
752 | ||
f591fa5d JB |
753 | static ieee80211_tx_result debug_noinline |
754 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
755 | { | |
756 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
757 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
758 | u16 *seq; | |
759 | u8 *qc; | |
760 | int tid; | |
761 | ||
25d834e1 JB |
762 | /* |
763 | * Packet injection may want to control the sequence | |
764 | * number, if we have no matching interface then we | |
765 | * neither assign one ourselves nor ask the driver to. | |
766 | */ | |
5061b0c2 | 767 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
768 | return TX_CONTINUE; |
769 | ||
f591fa5d JB |
770 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
771 | return TX_CONTINUE; | |
772 | ||
773 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
774 | return TX_CONTINUE; | |
775 | ||
49a59543 JB |
776 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
777 | return TX_CONTINUE; | |
778 | ||
94778280 JB |
779 | /* |
780 | * Anything but QoS data that has a sequence number field | |
781 | * (is long enough) gets a sequence number from the global | |
782 | * counter. | |
783 | */ | |
f591fa5d | 784 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 785 | /* driver should assign sequence number */ |
f591fa5d | 786 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
787 | /* for pure STA mode without beacons, we can do it */ |
788 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
789 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
790 | return TX_CONTINUE; |
791 | } | |
792 | ||
793 | /* | |
794 | * This should be true for injected/management frames only, for | |
795 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
796 | * above since they are not QoS-data frames. | |
797 | */ | |
798 | if (!tx->sta) | |
799 | return TX_CONTINUE; | |
800 | ||
801 | /* include per-STA, per-TID sequence counter */ | |
802 | ||
803 | qc = ieee80211_get_qos_ctl(hdr); | |
804 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
805 | seq = &tx->sta->tid_seq[tid]; | |
806 | ||
807 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
808 | ||
809 | /* Increase the sequence number. */ | |
810 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
811 | ||
812 | return TX_CONTINUE; | |
813 | } | |
814 | ||
252b86c4 | 815 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
816 | struct sk_buff *skb, int hdrlen, |
817 | int frag_threshold) | |
818 | { | |
252b86c4 | 819 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 820 | struct ieee80211_tx_info *info; |
252b86c4 | 821 | struct sk_buff *tmp; |
2de8e0d9 JB |
822 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
823 | int pos = hdrlen + per_fragm; | |
824 | int rem = skb->len - hdrlen - per_fragm; | |
825 | ||
826 | if (WARN_ON(rem < 0)) | |
827 | return -EINVAL; | |
828 | ||
252b86c4 JB |
829 | /* first fragment was already added to queue by caller */ |
830 | ||
2de8e0d9 JB |
831 | while (rem) { |
832 | int fraglen = per_fragm; | |
833 | ||
834 | if (fraglen > rem) | |
835 | fraglen = rem; | |
836 | rem -= fraglen; | |
837 | tmp = dev_alloc_skb(local->tx_headroom + | |
838 | frag_threshold + | |
839 | IEEE80211_ENCRYPT_HEADROOM + | |
840 | IEEE80211_ENCRYPT_TAILROOM); | |
841 | if (!tmp) | |
842 | return -ENOMEM; | |
252b86c4 JB |
843 | |
844 | __skb_queue_tail(&tx->skbs, tmp); | |
845 | ||
2de8e0d9 JB |
846 | skb_reserve(tmp, local->tx_headroom + |
847 | IEEE80211_ENCRYPT_HEADROOM); | |
848 | /* copy control information */ | |
849 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
850 | |
851 | info = IEEE80211_SKB_CB(tmp); | |
852 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
853 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
854 | ||
855 | if (rem) | |
856 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
857 | ||
2de8e0d9 JB |
858 | skb_copy_queue_mapping(tmp, skb); |
859 | tmp->priority = skb->priority; | |
2de8e0d9 | 860 | tmp->dev = skb->dev; |
2de8e0d9 JB |
861 | |
862 | /* copy header and data */ | |
863 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
864 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
865 | ||
866 | pos += fraglen; | |
867 | } | |
868 | ||
252b86c4 | 869 | /* adjust first fragment's length */ |
2de8e0d9 JB |
870 | skb->len = hdrlen + per_fragm; |
871 | return 0; | |
872 | } | |
873 | ||
d9e8a70f | 874 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
875 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
876 | { | |
2de8e0d9 JB |
877 | struct sk_buff *skb = tx->skb; |
878 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
879 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 880 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
881 | int hdrlen; |
882 | int fragnum; | |
e2454948 | 883 | |
252b86c4 JB |
884 | /* no matter what happens, tx->skb moves to tx->skbs */ |
885 | __skb_queue_tail(&tx->skbs, skb); | |
886 | tx->skb = NULL; | |
887 | ||
a26eb27a JB |
888 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
889 | return TX_CONTINUE; | |
890 | ||
891 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
892 | return TX_CONTINUE; |
893 | ||
eefce91a JB |
894 | /* |
895 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 896 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 897 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 898 | */ |
8b30b1fe | 899 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
900 | return TX_DROP; |
901 | ||
065e9605 | 902 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 903 | |
a26eb27a | 904 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 905 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 906 | return TX_DROP; |
e6a9854b | 907 | |
2de8e0d9 JB |
908 | /* |
909 | * Now fragment the frame. This will allocate all the fragments and | |
910 | * chain them (using skb as the first fragment) to skb->next. | |
911 | * During transmission, we will remove the successfully transmitted | |
912 | * fragments from this list. When the low-level driver rejects one | |
913 | * of the fragments then we will simply pretend to accept the skb | |
914 | * but store it away as pending. | |
915 | */ | |
252b86c4 | 916 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 917 | return TX_DROP; |
e6a9854b | 918 | |
2de8e0d9 JB |
919 | /* update duration/seq/flags of fragments */ |
920 | fragnum = 0; | |
252b86c4 JB |
921 | |
922 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 923 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 924 | |
2de8e0d9 JB |
925 | hdr = (void *)skb->data; |
926 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 927 | |
252b86c4 | 928 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 929 | hdr->frame_control |= morefrags; |
e6a9854b JB |
930 | /* |
931 | * No multi-rate retries for fragmented frames, that | |
932 | * would completely throw off the NAV at other STAs. | |
933 | */ | |
934 | info->control.rates[1].idx = -1; | |
935 | info->control.rates[2].idx = -1; | |
936 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 937 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 938 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
939 | } else { |
940 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 941 | } |
2de8e0d9 JB |
942 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
943 | fragnum++; | |
252b86c4 | 944 | } |
e2ebc74d | 945 | |
9ae54c84 | 946 | return TX_CONTINUE; |
e2ebc74d JB |
947 | } |
948 | ||
feff1f2f JB |
949 | static ieee80211_tx_result debug_noinline |
950 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
951 | { | |
252b86c4 | 952 | struct sk_buff *skb; |
560d2682 | 953 | int ac = -1; |
feff1f2f JB |
954 | |
955 | if (!tx->sta) | |
956 | return TX_CONTINUE; | |
957 | ||
252b86c4 | 958 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 959 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 960 | tx->sta->tx_fragments++; |
560d2682 | 961 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 962 | } |
560d2682 JB |
963 | if (ac >= 0) |
964 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
965 | |
966 | return TX_CONTINUE; | |
967 | } | |
968 | ||
d9e8a70f | 969 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
970 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
971 | { | |
972 | if (!tx->key) | |
973 | return TX_CONTINUE; | |
974 | ||
97359d12 JB |
975 | switch (tx->key->conf.cipher) { |
976 | case WLAN_CIPHER_SUITE_WEP40: | |
977 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 978 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 979 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 980 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 981 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 982 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 983 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 984 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 985 | default: |
d32a1028 | 986 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
987 | } |
988 | ||
e2454948 JB |
989 | return TX_DROP; |
990 | } | |
991 | ||
d9e8a70f | 992 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
993 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
994 | { | |
252b86c4 | 995 | struct sk_buff *skb; |
2de8e0d9 JB |
996 | struct ieee80211_hdr *hdr; |
997 | int next_len; | |
998 | bool group_addr; | |
03f93c3d | 999 | |
252b86c4 | 1000 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1001 | hdr = (void *) skb->data; |
7e0aae47 JM |
1002 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1003 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1004 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1005 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1006 | next_len = next->len; | |
1007 | } else | |
1008 | next_len = 0; | |
2de8e0d9 | 1009 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1010 | |
2de8e0d9 | 1011 | hdr->duration_id = |
252b86c4 JB |
1012 | ieee80211_duration(tx, skb, group_addr, next_len); |
1013 | } | |
03f93c3d JB |
1014 | |
1015 | return TX_CONTINUE; | |
1016 | } | |
1017 | ||
e2ebc74d JB |
1018 | /* actual transmit path */ |
1019 | ||
a622ab72 JB |
1020 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1021 | struct sk_buff *skb, | |
1022 | struct ieee80211_tx_info *info, | |
1023 | struct tid_ampdu_tx *tid_tx, | |
1024 | int tid) | |
1025 | { | |
1026 | bool queued = false; | |
285fa695 | 1027 | bool reset_agg_timer = false; |
aa454580 | 1028 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1029 | |
1030 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1031 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1032 | reset_agg_timer = true; |
0ab33703 JB |
1033 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1034 | /* | |
1035 | * nothing -- this aggregation session is being started | |
1036 | * but that might still fail with the driver | |
1037 | */ | |
a622ab72 JB |
1038 | } else { |
1039 | spin_lock(&tx->sta->lock); | |
1040 | /* | |
1041 | * Need to re-check now, because we may get here | |
1042 | * | |
1043 | * 1) in the window during which the setup is actually | |
1044 | * already done, but not marked yet because not all | |
1045 | * packets are spliced over to the driver pending | |
1046 | * queue yet -- if this happened we acquire the lock | |
1047 | * either before or after the splice happens, but | |
1048 | * need to recheck which of these cases happened. | |
1049 | * | |
1050 | * 2) during session teardown, if the OPERATIONAL bit | |
1051 | * was cleared due to the teardown but the pointer | |
1052 | * hasn't been assigned NULL yet (or we loaded it | |
1053 | * before it was assigned) -- in this case it may | |
1054 | * now be NULL which means we should just let the | |
1055 | * packet pass through because splicing the frames | |
1056 | * back is already done. | |
1057 | */ | |
40b275b6 | 1058 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1059 | |
1060 | if (!tid_tx) { | |
1061 | /* do nothing, let packet pass through */ | |
1062 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1063 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1064 | reset_agg_timer = true; |
a622ab72 JB |
1065 | } else { |
1066 | queued = true; | |
1067 | info->control.vif = &tx->sdata->vif; | |
1068 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1069 | __skb_queue_tail(&tid_tx->pending, skb); | |
aa454580 HS |
1070 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1071 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1072 | } |
1073 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1074 | |
1075 | if (purge_skb) | |
c3e7724b | 1076 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1077 | } |
1078 | ||
285fa695 NM |
1079 | /* reset session timer */ |
1080 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1081 | tid_tx->last_tx = jiffies; |
285fa695 | 1082 | |
a622ab72 JB |
1083 | return queued; |
1084 | } | |
1085 | ||
58d4185e JB |
1086 | /* |
1087 | * initialises @tx | |
1088 | */ | |
9ae54c84 | 1089 | static ieee80211_tx_result |
3b8d81e0 JB |
1090 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1091 | struct ieee80211_tx_data *tx, | |
1092 | struct sk_buff *skb) | |
e2ebc74d | 1093 | { |
3b8d81e0 | 1094 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1095 | struct ieee80211_hdr *hdr; |
e039fa4a | 1096 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1097 | int tid; |
a622ab72 | 1098 | u8 *qc; |
e2ebc74d JB |
1099 | |
1100 | memset(tx, 0, sizeof(*tx)); | |
1101 | tx->skb = skb; | |
e2ebc74d | 1102 | tx->local = local; |
3b8d81e0 | 1103 | tx->sdata = sdata; |
252b86c4 | 1104 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1105 | |
cd8ffc80 JB |
1106 | /* |
1107 | * If this flag is set to true anywhere, and we get here, | |
1108 | * we are doing the needed processing, so remove the flag | |
1109 | * now. | |
1110 | */ | |
1111 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1112 | ||
58d4185e JB |
1113 | hdr = (struct ieee80211_hdr *) skb->data; |
1114 | ||
3f0e0b22 | 1115 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1116 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1117 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1118 | return TX_DROP; | |
66f2c99a FF |
1119 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED || |
1120 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
b4d57adb | 1121 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1122 | } |
f14543ee | 1123 | if (!tx->sta) |
abe60632 | 1124 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1125 | |
cd8ffc80 | 1126 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1127 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1128 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1129 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1130 | struct tid_ampdu_tx *tid_tx; |
1131 | ||
8b30b1fe S |
1132 | qc = ieee80211_get_qos_ctl(hdr); |
1133 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1134 | ||
a622ab72 JB |
1135 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1136 | if (tid_tx) { | |
1137 | bool queued; | |
cd8ffc80 | 1138 | |
a622ab72 JB |
1139 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1140 | tid_tx, tid); | |
1141 | ||
1142 | if (unlikely(queued)) | |
1143 | return TX_QUEUED; | |
1144 | } | |
8b30b1fe S |
1145 | } |
1146 | ||
badffb72 | 1147 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1148 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1149 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1150 | } else |
5cf121c3 | 1151 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1152 | |
a26eb27a JB |
1153 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1154 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1155 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1156 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1157 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1158 | } |
1159 | ||
e2ebc74d | 1160 | if (!tx->sta) |
e039fa4a | 1161 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1162 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1163 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1164 | |
e039fa4a | 1165 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1166 | |
9ae54c84 | 1167 | return TX_CONTINUE; |
e2ebc74d JB |
1168 | } |
1169 | ||
11127e91 JB |
1170 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1171 | struct ieee80211_vif *vif, | |
1172 | struct ieee80211_sta *sta, | |
1173 | struct sk_buff_head *skbs, | |
1174 | bool txpending) | |
e2ebc74d | 1175 | { |
36323f81 | 1176 | struct ieee80211_tx_control control; |
252b86c4 | 1177 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1178 | unsigned long flags; |
e2ebc74d | 1179 | |
252b86c4 | 1180 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1181 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1182 | int q = info->hw_queue; | |
1183 | ||
1184 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1185 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1186 | __skb_unlink(skb, skbs); | |
c3e7724b | 1187 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1188 | continue; |
1189 | } | |
1190 | #endif | |
3b8d81e0 JB |
1191 | |
1192 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1193 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1194 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1195 | if (unlikely(info->flags & |
a7679ed5 SF |
1196 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1197 | if (local->queue_stop_reasons[q] & | |
1198 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1199 | /* | |
1200 | * Drop off-channel frames if queues | |
1201 | * are stopped for any reason other | |
1202 | * than off-channel operation. Never | |
1203 | * queue them. | |
1204 | */ | |
1205 | spin_unlock_irqrestore( | |
1206 | &local->queue_stop_reason_lock, | |
1207 | flags); | |
1208 | ieee80211_purge_tx_queue(&local->hw, | |
1209 | skbs); | |
1210 | return true; | |
1211 | } | |
1212 | } else { | |
1213 | ||
6c17b77b | 1214 | /* |
a7679ed5 SF |
1215 | * Since queue is stopped, queue up frames for |
1216 | * later transmission from the tx-pending | |
1217 | * tasklet when the queue is woken again. | |
6c17b77b | 1218 | */ |
a7679ed5 SF |
1219 | if (txpending) |
1220 | skb_queue_splice_init(skbs, | |
1221 | &local->pending[q]); | |
1222 | else | |
1223 | skb_queue_splice_tail_init(skbs, | |
1224 | &local->pending[q]); | |
1225 | ||
1226 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1227 | flags); | |
1228 | return false; | |
6c17b77b | 1229 | } |
7bb45683 | 1230 | } |
3b8d81e0 | 1231 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1232 | |
11127e91 | 1233 | info->control.vif = vif; |
36323f81 | 1234 | control.sta = sta; |
f0e72851 | 1235 | |
11127e91 | 1236 | __skb_unlink(skb, skbs); |
36323f81 | 1237 | drv_tx(local, &control, skb); |
11127e91 | 1238 | } |
5061b0c2 | 1239 | |
11127e91 JB |
1240 | return true; |
1241 | } | |
1242 | ||
1243 | /* | |
1244 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1245 | */ | |
1246 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1247 | struct sk_buff_head *skbs, int led_len, | |
1248 | struct sta_info *sta, bool txpending) | |
1249 | { | |
1250 | struct ieee80211_tx_info *info; | |
1251 | struct ieee80211_sub_if_data *sdata; | |
1252 | struct ieee80211_vif *vif; | |
1253 | struct ieee80211_sta *pubsta; | |
1254 | struct sk_buff *skb; | |
1255 | bool result = true; | |
1256 | __le16 fc; | |
5061b0c2 | 1257 | |
11127e91 JB |
1258 | if (WARN_ON(skb_queue_empty(skbs))) |
1259 | return true; | |
ec25acc4 | 1260 | |
11127e91 JB |
1261 | skb = skb_peek(skbs); |
1262 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1263 | info = IEEE80211_SKB_CB(skb); | |
1264 | sdata = vif_to_sdata(info->control.vif); | |
1265 | if (sta && !sta->uploaded) | |
1266 | sta = NULL; | |
1267 | ||
1268 | if (sta) | |
1269 | pubsta = &sta->sta; | |
1270 | else | |
1271 | pubsta = NULL; | |
1272 | ||
1273 | switch (sdata->vif.type) { | |
1274 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1275 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1276 | vif = &sdata->vif; | |
1277 | break; | |
1278 | } | |
4b6f1dd6 | 1279 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1280 | if (sdata) { |
4b6f1dd6 | 1281 | vif = &sdata->vif; |
3a25a8c8 JB |
1282 | info->hw_queue = |
1283 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1284 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1285 | dev_kfree_skb(skb); | |
1286 | return true; | |
1287 | } else | |
4b6f1dd6 | 1288 | vif = NULL; |
11127e91 JB |
1289 | break; |
1290 | case NL80211_IFTYPE_AP_VLAN: | |
1291 | sdata = container_of(sdata->bss, | |
1292 | struct ieee80211_sub_if_data, u.ap); | |
1293 | /* fall through */ | |
1294 | default: | |
1295 | vif = &sdata->vif; | |
1296 | break; | |
e2ebc74d | 1297 | } |
2de8e0d9 | 1298 | |
cb831b53 JB |
1299 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1300 | txpending); | |
11127e91 | 1301 | |
74e4dbfd | 1302 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1303 | |
4db4e0a1 | 1304 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1305 | |
11127e91 | 1306 | return result; |
e2ebc74d JB |
1307 | } |
1308 | ||
97b045d6 JB |
1309 | /* |
1310 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1311 | * frame was dropped or queued. | |
1312 | */ | |
1313 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1314 | { | |
252b86c4 | 1315 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1316 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1317 | |
9aa4aee3 JB |
1318 | #define CALL_TXH(txh) \ |
1319 | do { \ | |
1320 | res = txh(tx); \ | |
1321 | if (res != TX_CONTINUE) \ | |
1322 | goto txh_done; \ | |
1323 | } while (0) | |
1324 | ||
5c1b98a5 | 1325 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1326 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1327 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1328 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1329 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1330 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1331 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1332 | |
aa5b5492 JB |
1333 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1334 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1335 | tx->skb = NULL; | |
c6fcf6bc | 1336 | goto txh_done; |
aa5b5492 | 1337 | } |
c6fcf6bc JB |
1338 | |
1339 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1340 | CALL_TXH(ieee80211_tx_h_sequence); |
1341 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1342 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1343 | CALL_TXH(ieee80211_tx_h_stats); |
1344 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1345 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1346 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1347 | #undef CALL_TXH |
97b045d6 | 1348 | |
d9e8a70f | 1349 | txh_done: |
97b045d6 | 1350 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1351 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1352 | if (tx->skb) |
c3e7724b | 1353 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1354 | else |
1f98ab7f | 1355 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1356 | return -1; |
1357 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1358 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1359 | return -1; |
1360 | } | |
1361 | ||
1362 | return 0; | |
1363 | } | |
1364 | ||
7bb45683 JB |
1365 | /* |
1366 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1367 | */ | |
1368 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
55de908a JB |
1369 | struct sk_buff *skb, bool txpending, |
1370 | enum ieee80211_band band) | |
e2ebc74d | 1371 | { |
3b8d81e0 | 1372 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1373 | struct ieee80211_tx_data tx; |
97b045d6 | 1374 | ieee80211_tx_result res_prepare; |
e039fa4a | 1375 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1376 | bool result = true; |
74e4dbfd | 1377 | int led_len; |
e2ebc74d | 1378 | |
e2ebc74d JB |
1379 | if (unlikely(skb->len < 10)) { |
1380 | dev_kfree_skb(skb); | |
7bb45683 | 1381 | return true; |
e2ebc74d JB |
1382 | } |
1383 | ||
58d4185e | 1384 | /* initialises tx */ |
74e4dbfd | 1385 | led_len = skb->len; |
3b8d81e0 | 1386 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1387 | |
cd8ffc80 | 1388 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1389 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1390 | return true; |
cd8ffc80 | 1391 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1392 | return true; |
e2ebc74d JB |
1393 | } |
1394 | ||
55de908a | 1395 | info->band = band; |
e2ebc74d | 1396 | |
3a25a8c8 JB |
1397 | /* set up hw_queue value early */ |
1398 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1399 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1400 | info->hw_queue = | |
1401 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1402 | ||
7bb45683 | 1403 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1404 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1405 | tx.sta, txpending); | |
55de908a | 1406 | |
7bb45683 | 1407 | return result; |
e2ebc74d JB |
1408 | } |
1409 | ||
1410 | /* device xmit handlers */ | |
1411 | ||
3bff1865 | 1412 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1413 | struct sk_buff *skb, |
1414 | int head_need, bool may_encrypt) | |
1415 | { | |
3bff1865 | 1416 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1417 | int tail_need = 0; |
1418 | ||
3bff1865 | 1419 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1420 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1421 | tail_need -= skb_tailroom(skb); | |
1422 | tail_need = max_t(int, tail_need, 0); | |
1423 | } | |
1424 | ||
fc7c976d | 1425 | if (skb_cloned(skb)) |
23c0752a | 1426 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1427 | else if (head_need || tail_need) |
23c0752a | 1428 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1429 | else |
1430 | return 0; | |
23c0752a JB |
1431 | |
1432 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1433 | wiphy_debug(local->hw.wiphy, |
1434 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1435 | return -ENOMEM; |
1436 | } | |
1437 | ||
23c0752a JB |
1438 | return 0; |
1439 | } | |
1440 | ||
55de908a JB |
1441 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
1442 | enum ieee80211_band band) | |
e2ebc74d | 1443 | { |
3b8d81e0 | 1444 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1445 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1446 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1447 | int headroom; |
23c0752a | 1448 | bool may_encrypt; |
e2ebc74d | 1449 | |
3b8d81e0 | 1450 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1451 | |
3b8d81e0 | 1452 | headroom = local->tx_headroom; |
23c0752a JB |
1453 | if (may_encrypt) |
1454 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1455 | headroom -= skb_headroom(skb); | |
1456 | headroom = max_t(int, 0, headroom); | |
1457 | ||
3bff1865 | 1458 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1459 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1460 | return; |
e2ebc74d JB |
1461 | } |
1462 | ||
740c1aa3 | 1463 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1464 | info->control.vif = &sdata->vif; |
e2ebc74d | 1465 | |
3f52b7e3 MP |
1466 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1467 | if (ieee80211_is_data(hdr->frame_control) && | |
1468 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1469 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1470 | return; /* skb queued: don't free */ |
1471 | } else { | |
1472 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1473 | } | |
98aed9fd | 1474 | } |
cca89496 | 1475 | |
2154c81c | 1476 | ieee80211_set_qos_hdr(sdata, skb); |
55de908a | 1477 | ieee80211_tx(sdata, skb, false, band); |
e2ebc74d JB |
1478 | } |
1479 | ||
73b9f03a JB |
1480 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1481 | { | |
1482 | struct ieee80211_radiotap_iterator iterator; | |
1483 | struct ieee80211_radiotap_header *rthdr = | |
1484 | (struct ieee80211_radiotap_header *) skb->data; | |
1485 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1486 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1487 | NULL); | |
1488 | u16 txflags; | |
1489 | ||
1490 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1491 | IEEE80211_TX_CTL_DONTFRAG; | |
1492 | ||
1493 | /* | |
1494 | * for every radiotap entry that is present | |
1495 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1496 | * entries present, or -EINVAL on error) | |
1497 | */ | |
1498 | ||
1499 | while (!ret) { | |
1500 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1501 | ||
1502 | if (ret) | |
1503 | continue; | |
1504 | ||
1505 | /* see if this argument is something we can use */ | |
1506 | switch (iterator.this_arg_index) { | |
1507 | /* | |
1508 | * You must take care when dereferencing iterator.this_arg | |
1509 | * for multibyte types... the pointer is not aligned. Use | |
1510 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1511 | * iterator.this_arg for type "type" safely on all arches. | |
1512 | */ | |
1513 | case IEEE80211_RADIOTAP_FLAGS: | |
1514 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1515 | /* | |
1516 | * this indicates that the skb we have been | |
1517 | * handed has the 32-bit FCS CRC at the end... | |
1518 | * we should react to that by snipping it off | |
1519 | * because it will be recomputed and added | |
1520 | * on transmission | |
1521 | */ | |
1522 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1523 | return false; | |
1524 | ||
1525 | skb_trim(skb, skb->len - FCS_LEN); | |
1526 | } | |
1527 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1528 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1529 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1530 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1531 | break; | |
1532 | ||
1533 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1534 | txflags = get_unaligned_le16(iterator.this_arg); | |
1535 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1536 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1537 | break; | |
1538 | ||
1539 | /* | |
1540 | * Please update the file | |
1541 | * Documentation/networking/mac80211-injection.txt | |
1542 | * when parsing new fields here. | |
1543 | */ | |
1544 | ||
1545 | default: | |
1546 | break; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1551 | return false; | |
1552 | ||
1553 | /* | |
1554 | * remove the radiotap header | |
1555 | * iterator->_max_length was sanity-checked against | |
1556 | * skb->len by iterator init | |
1557 | */ | |
1558 | skb_pull(skb, iterator._max_length); | |
1559 | ||
1560 | return true; | |
1561 | } | |
1562 | ||
d0cf9c0d SH |
1563 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1564 | struct net_device *dev) | |
e2ebc74d JB |
1565 | { |
1566 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a JB |
1567 | struct ieee80211_chanctx_conf *chanctx_conf; |
1568 | struct ieee80211_channel *chan; | |
e2ebc74d JB |
1569 | struct ieee80211_radiotap_header *prthdr = |
1570 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1571 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1572 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1573 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
9b8a74e3 | 1574 | u16 len_rthdr; |
5d9cf4a5 | 1575 | int hdrlen; |
e2ebc74d | 1576 | |
9b8a74e3 AG |
1577 | /* check for not even having the fixed radiotap header part */ |
1578 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1579 | goto fail; /* too short to be possibly valid */ | |
1580 | ||
1581 | /* is it a header version we can trust to find length from? */ | |
1582 | if (unlikely(prthdr->it_version)) | |
1583 | goto fail; /* only version 0 is supported */ | |
1584 | ||
1585 | /* then there must be a radiotap header with a length we can use */ | |
1586 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1587 | ||
1588 | /* does the skb contain enough to deliver on the alleged length? */ | |
1589 | if (unlikely(skb->len < len_rthdr)) | |
1590 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1591 | |
e2ebc74d JB |
1592 | /* |
1593 | * fix up the pointers accounting for the radiotap | |
1594 | * header still being in there. We are being given | |
1595 | * a precooked IEEE80211 header so no need for | |
1596 | * normal processing | |
1597 | */ | |
9b8a74e3 | 1598 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1599 | /* |
9b8a74e3 AG |
1600 | * these are just fixed to the end of the rt area since we |
1601 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1602 | */ |
9b8a74e3 AG |
1603 | skb_set_network_header(skb, len_rthdr); |
1604 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1605 | |
5d9cf4a5 JB |
1606 | if (skb->len < len_rthdr + 2) |
1607 | goto fail; | |
1608 | ||
1609 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1610 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1611 | ||
1612 | if (skb->len < len_rthdr + hdrlen) | |
1613 | goto fail; | |
1614 | ||
f75f5c6f HS |
1615 | /* |
1616 | * Initialize skb->protocol if the injected frame is a data frame | |
1617 | * carrying a rfc1042 header | |
1618 | */ | |
5d9cf4a5 JB |
1619 | if (ieee80211_is_data(hdr->frame_control) && |
1620 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1621 | u8 *payload = (u8 *)hdr + hdrlen; | |
1622 | ||
b203ca39 | 1623 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1624 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1625 | payload[7]); | |
f75f5c6f HS |
1626 | } |
1627 | ||
3b8d81e0 JB |
1628 | memset(info, 0, sizeof(*info)); |
1629 | ||
5d9cf4a5 | 1630 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1631 | IEEE80211_TX_CTL_INJECTED; |
1632 | ||
1633 | /* process and remove the injection radiotap header */ | |
1634 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1635 | goto fail; | |
5d9cf4a5 JB |
1636 | |
1637 | rcu_read_lock(); | |
1638 | ||
1639 | /* | |
1640 | * We process outgoing injected frames that have a local address | |
1641 | * we handle as though they are non-injected frames. | |
1642 | * This code here isn't entirely correct, the local MAC address | |
1643 | * isn't always enough to find the interface to use; for proper | |
1644 | * VLAN/WDS support we will need a different mechanism (which | |
1645 | * likely isn't going to be monitor interfaces). | |
1646 | */ | |
1647 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1648 | ||
1649 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1650 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1651 | continue; | |
1652 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1653 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1654 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1655 | continue; | |
b203ca39 | 1656 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1657 | sdata = tmp_sdata; |
1658 | break; | |
1659 | } | |
1660 | } | |
7351c6bd | 1661 | |
55de908a JB |
1662 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1663 | if (!chanctx_conf) { | |
1664 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1665 | if (tmp_sdata) | |
1666 | chanctx_conf = | |
1667 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1668 | } | |
55de908a | 1669 | |
b4a7ff75 FF |
1670 | if (chanctx_conf) |
1671 | chan = chanctx_conf->def.chan; | |
1672 | else if (!local->use_chanctx) | |
675a0b04 | 1673 | chan = local->_oper_chandef.chan; |
b4a7ff75 FF |
1674 | else |
1675 | goto fail_rcu; | |
55de908a JB |
1676 | |
1677 | /* | |
1678 | * Frame injection is not allowed if beaconing is not allowed | |
1679 | * or if we need radar detection. Beaconing is usually not allowed when | |
1680 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1681 | * Passive scan is also used in world regulatory domains where | |
1682 | * your country is not known and as such it should be treated as | |
1683 | * NO TX unless the channel is explicitly allowed in which case | |
1684 | * your current regulatory domain would not have the passive scan | |
1685 | * flag. | |
1686 | * | |
1687 | * Since AP mode uses monitor interfaces to inject/TX management | |
1688 | * frames we can make AP mode the exception to this rule once it | |
1689 | * supports radar detection as its implementation can deal with | |
1690 | * radar detection by itself. We can do that later by adding a | |
1691 | * monitor flag interfaces used for AP support. | |
1692 | */ | |
1693 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1694 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1695 | goto fail_rcu; | |
1696 | ||
1697 | ieee80211_xmit(sdata, skb, chan->band); | |
5d9cf4a5 JB |
1698 | rcu_read_unlock(); |
1699 | ||
e2ebc74d | 1700 | return NETDEV_TX_OK; |
9b8a74e3 | 1701 | |
55de908a JB |
1702 | fail_rcu: |
1703 | rcu_read_unlock(); | |
9b8a74e3 AG |
1704 | fail: |
1705 | dev_kfree_skb(skb); | |
1706 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1707 | } |
1708 | ||
1709 | /** | |
1710 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1711 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1712 | * @skb: packet to be sent | |
1713 | * @dev: incoming interface | |
1714 | * | |
1715 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1716 | * not be freed, and caller is responsible for either retrying later or freeing | |
1717 | * skb). | |
1718 | * | |
1719 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1720 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1721 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1722 | * transmission (through low-level driver). | |
1723 | */ | |
d0cf9c0d SH |
1724 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1725 | struct net_device *dev) | |
e2ebc74d | 1726 | { |
133b8226 JB |
1727 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1728 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1729 | struct ieee80211_tx_info *info; |
dcf33963 | 1730 | int head_need; |
065e9605 HH |
1731 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1732 | __le16 fc; | |
e2ebc74d | 1733 | struct ieee80211_hdr hdr; |
ff67bb86 | 1734 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1735 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1736 | const u8 *encaps_data; |
1737 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1738 | int nh_pos, h_pos; |
f14543ee | 1739 | struct sta_info *sta = NULL; |
c2c98fde | 1740 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1741 | bool tdls_direct = false; |
a729cff8 JB |
1742 | bool multicast; |
1743 | u32 info_flags = 0; | |
1744 | u16 info_id = 0; | |
55de908a JB |
1745 | struct ieee80211_chanctx_conf *chanctx_conf; |
1746 | struct ieee80211_sub_if_data *ap_sdata; | |
1747 | enum ieee80211_band band; | |
e2ebc74d | 1748 | |
dcf33963 | 1749 | if (unlikely(skb->len < ETH_HLEN)) |
e2ebc74d | 1750 | goto fail; |
e2ebc74d | 1751 | |
e2ebc74d JB |
1752 | /* convert Ethernet header to proper 802.11 header (based on |
1753 | * operation mode) */ | |
1754 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1755 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1756 | |
55de908a JB |
1757 | rcu_read_lock(); |
1758 | ||
51fb61e7 | 1759 | switch (sdata->vif.type) { |
05c914fe | 1760 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1761 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1762 | if (sta) { |
1763 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1764 | /* RA TA DA SA */ | |
1765 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1766 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1767 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1768 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1769 | hdrlen = 30; | |
c2c98fde JB |
1770 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1771 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee | 1772 | } |
55de908a JB |
1773 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1774 | u.ap); | |
1775 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
1776 | if (!chanctx_conf) | |
1777 | goto fail_rcu; | |
4bf88530 | 1778 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1779 | if (sta) |
1780 | break; | |
1781 | /* fall through */ | |
1782 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1783 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1784 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1785 | if (!chanctx_conf) | |
1786 | goto fail_rcu; | |
065e9605 | 1787 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1788 | /* DA BSSID SA */ |
1789 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1790 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1791 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1792 | hdrlen = 24; | |
4bf88530 | 1793 | band = chanctx_conf->def.chan->band; |
cf966838 | 1794 | break; |
05c914fe | 1795 | case NL80211_IFTYPE_WDS: |
065e9605 | 1796 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1797 | /* RA TA DA SA */ |
1798 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1799 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1800 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1801 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1802 | hdrlen = 30; | |
55de908a JB |
1803 | /* |
1804 | * This is the exception! WDS style interfaces are prohibited | |
1805 | * when channel contexts are in used so this must be valid | |
1806 | */ | |
675a0b04 | 1807 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 1808 | break; |
33b64eb2 | 1809 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1810 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 1811 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1812 | struct sta_info *next_hop; |
1813 | bool mpp_lookup = true; | |
1814 | ||
bf7cd94d | 1815 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1816 | if (mpath) { |
1817 | mpp_lookup = false; | |
1818 | next_hop = rcu_dereference(mpath->next_hop); | |
1819 | if (!next_hop || | |
1820 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1821 | MESH_PATH_RESOLVING))) | |
1822 | mpp_lookup = true; | |
1823 | } | |
1824 | ||
1825 | if (mpp_lookup) | |
bf7cd94d | 1826 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1827 | |
1828 | if (mppath && mpath) | |
1829 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1830 | } |
79617dee | 1831 | |
f76b57b4 | 1832 | /* |
9d52501b JF |
1833 | * Use address extension if it is a packet from |
1834 | * another interface or if we know the destination | |
1835 | * is being proxied by a portal (i.e. portal address | |
1836 | * differs from proxied address) | |
f76b57b4 | 1837 | */ |
b203ca39 JP |
1838 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1839 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1840 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1841 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1842 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1843 | NULL, NULL); | |
79617dee | 1844 | } else { |
27f01124 TP |
1845 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1846 | * For unicast with unknown forwarding information, | |
1847 | * destination might be in the MBSS or if that fails | |
1848 | * forwarded to another mesh gate. In either case | |
1849 | * resolution will be handled in ieee80211_xmit(), so | |
1850 | * leave the original DA. This also works for mcast */ | |
1851 | const u8 *mesh_da = skb->data; | |
1852 | ||
1853 | if (mppath) | |
1854 | mesh_da = mppath->mpp; | |
1855 | else if (mpath) | |
1856 | mesh_da = mpath->dst; | |
79617dee | 1857 | |
3c5772a5 | 1858 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1859 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1860 | if (is_multicast_ether_addr(mesh_da)) |
1861 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1862 | meshhdrlen = ieee80211_new_mesh_header( |
1863 | sdata, &mesh_hdr, | |
1864 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1865 | else |
27f01124 | 1866 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1867 | meshhdrlen = ieee80211_new_mesh_header( |
1868 | sdata, &mesh_hdr, skb->data, | |
1869 | skb->data + ETH_ALEN); | |
79617dee | 1870 | |
79617dee | 1871 | } |
55de908a JB |
1872 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1873 | if (!chanctx_conf) | |
1874 | goto fail_rcu; | |
4bf88530 | 1875 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1876 | break; |
1877 | #endif | |
05c914fe | 1878 | case NL80211_IFTYPE_STATION: |
941c93cd | 1879 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1880 | bool tdls_peer = false; |
1881 | ||
941c93cd | 1882 | sta = sta_info_get(sdata, skb->data); |
c2c98fde JB |
1883 | if (sta) { |
1884 | authorized = test_sta_flag(sta, | |
1885 | WLAN_STA_AUTHORIZED); | |
1886 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1887 | tdls_peer = test_sta_flag(sta, | |
1888 | WLAN_STA_TDLS_PEER); | |
1889 | tdls_auth = test_sta_flag(sta, | |
1890 | WLAN_STA_TDLS_PEER_AUTH); | |
1891 | } | |
941c93cd AN |
1892 | |
1893 | /* | |
1894 | * If the TDLS link is enabled, send everything | |
1895 | * directly. Otherwise, allow TDLS setup frames | |
1896 | * to be transmitted indirectly. | |
1897 | */ | |
c2c98fde | 1898 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1899 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1900 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1901 | } | |
1902 | ||
1903 | if (tdls_direct) { | |
1904 | /* link during setup - throw out frames to peer */ | |
dcf33963 | 1905 | if (!tdls_auth) |
55de908a | 1906 | goto fail_rcu; |
941c93cd AN |
1907 | |
1908 | /* DA SA BSSID */ | |
1909 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1910 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1911 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1912 | hdrlen = 24; | |
1913 | } else if (sdata->u.mgd.use_4addr && | |
1914 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1915 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1916 | IEEE80211_FCTL_TODS); | |
f14543ee | 1917 | /* RA TA DA SA */ |
941c93cd | 1918 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1919 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1920 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1921 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1922 | hdrlen = 30; | |
1923 | } else { | |
1924 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1925 | /* BSSID SA DA */ | |
941c93cd | 1926 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
1927 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
1928 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1929 | hdrlen = 24; | |
1930 | } | |
55de908a JB |
1931 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1932 | if (!chanctx_conf) | |
1933 | goto fail_rcu; | |
4bf88530 | 1934 | band = chanctx_conf->def.chan->band; |
cf966838 | 1935 | break; |
05c914fe | 1936 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1937 | /* DA SA BSSID */ |
1938 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1939 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1940 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1941 | hdrlen = 24; |
55de908a JB |
1942 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1943 | if (!chanctx_conf) | |
1944 | goto fail_rcu; | |
4bf88530 | 1945 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
1946 | break; |
1947 | default: | |
55de908a | 1948 | goto fail_rcu; |
e2ebc74d JB |
1949 | } |
1950 | ||
7d185b8b JB |
1951 | /* |
1952 | * There's no need to try to look up the destination | |
1953 | * if it is a multicast address (which can only happen | |
1954 | * in AP mode) | |
1955 | */ | |
a729cff8 JB |
1956 | multicast = is_multicast_ether_addr(hdr.addr1); |
1957 | if (!multicast) { | |
abe60632 | 1958 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
1959 | if (sta) { |
1960 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
1961 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1962 | } | |
e2ebc74d JB |
1963 | } |
1964 | ||
4777be41 JC |
1965 | /* For mesh, the use of the QoS header is mandatory */ |
1966 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 1967 | wme_sta = true; |
4777be41 | 1968 | |
3434fbd3 | 1969 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 1970 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 1971 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
1972 | hdrlen += 2; |
1973 | } | |
1974 | ||
1975 | /* | |
238814fd JB |
1976 | * Drop unicast frames to unauthorised stations unless they are |
1977 | * EAPOL frames from the local station. | |
ce3edf6d | 1978 | */ |
55182e4a JB |
1979 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
1980 | !is_multicast_ether_addr(hdr.addr1) && !authorized && | |
1981 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || | |
b203ca39 | 1982 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 1983 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 1984 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 1985 | dev->name, hdr.addr1); |
ce3edf6d JB |
1986 | #endif |
1987 | ||
1988 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
1989 | ||
55de908a | 1990 | goto fail_rcu; |
ce3edf6d JB |
1991 | } |
1992 | ||
a729cff8 JB |
1993 | if (unlikely(!multicast && skb->sk && |
1994 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
1995 | struct sk_buff *orig_skb = skb; | |
1996 | ||
1997 | skb = skb_clone(skb, GFP_ATOMIC); | |
1998 | if (skb) { | |
1999 | unsigned long flags; | |
9475af6e | 2000 | int id; |
a729cff8 JB |
2001 | |
2002 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
9475af6e TH |
2003 | id = idr_alloc(&local->ack_status_frames, orig_skb, |
2004 | 1, 0x10000, GFP_ATOMIC); | |
a729cff8 JB |
2005 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2006 | ||
9475af6e | 2007 | if (id >= 0) { |
a729cff8 JB |
2008 | info_id = id; |
2009 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2010 | } else if (skb_shared(skb)) { | |
2011 | kfree_skb(orig_skb); | |
2012 | } else { | |
2013 | kfree_skb(skb); | |
2014 | skb = orig_skb; | |
2015 | } | |
2016 | } else { | |
2017 | /* couldn't clone -- lose tx status ... */ | |
2018 | skb = orig_skb; | |
2019 | } | |
2020 | } | |
2021 | ||
7e244707 HS |
2022 | /* |
2023 | * If the skb is shared we need to obtain our own copy. | |
2024 | */ | |
2025 | if (skb_shared(skb)) { | |
a729cff8 JB |
2026 | struct sk_buff *tmp_skb = skb; |
2027 | ||
2028 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2029 | WARN_ON(info_id); | |
2030 | ||
f8a0a781 | 2031 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2032 | kfree_skb(tmp_skb); |
2033 | ||
dcf33963 | 2034 | if (!skb) |
55de908a | 2035 | goto fail_rcu; |
7e244707 HS |
2036 | } |
2037 | ||
065e9605 | 2038 | hdr.frame_control = fc; |
e2ebc74d JB |
2039 | hdr.duration_id = 0; |
2040 | hdr.seq_ctrl = 0; | |
2041 | ||
2042 | skip_header_bytes = ETH_HLEN; | |
2043 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2044 | encaps_data = bridge_tunnel_header; | |
2045 | encaps_len = sizeof(bridge_tunnel_header); | |
2046 | skip_header_bytes -= 2; | |
e5c5d22e | 2047 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2048 | encaps_data = rfc1042_header; |
2049 | encaps_len = sizeof(rfc1042_header); | |
2050 | skip_header_bytes -= 2; | |
2051 | } else { | |
2052 | encaps_data = NULL; | |
2053 | encaps_len = 0; | |
2054 | } | |
2055 | ||
7e244707 HS |
2056 | nh_pos = skb_network_header(skb) - skb->data; |
2057 | h_pos = skb_transport_header(skb) - skb->data; | |
2058 | ||
e2ebc74d JB |
2059 | skb_pull(skb, skip_header_bytes); |
2060 | nh_pos -= skip_header_bytes; | |
2061 | h_pos -= skip_header_bytes; | |
2062 | ||
23c0752a | 2063 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2064 | |
23c0752a JB |
2065 | /* |
2066 | * So we need to modify the skb header and hence need a copy of | |
2067 | * that. The head_need variable above doesn't, so far, include | |
2068 | * the needed header space that we don't need right away. If we | |
2069 | * can, then we don't reallocate right now but only after the | |
2070 | * frame arrives at the master device (if it does...) | |
2071 | * | |
2072 | * If we cannot, however, then we will reallocate to include all | |
2073 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2074 | * make it big enough for everything we may ever need. | |
2075 | */ | |
e2ebc74d | 2076 | |
3a5be7d4 | 2077 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
2078 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
2079 | head_need += local->tx_headroom; | |
2080 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2081 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2082 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2083 | skb = NULL; |
55de908a | 2084 | goto fail_rcu; |
c3e7724b | 2085 | } |
e2ebc74d JB |
2086 | } |
2087 | ||
2088 | if (encaps_data) { | |
2089 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2090 | nh_pos += encaps_len; | |
2091 | h_pos += encaps_len; | |
2092 | } | |
c29b9b9b | 2093 | |
e4ab7eb0 | 2094 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2095 | if (meshhdrlen > 0) { |
2096 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2097 | nh_pos += meshhdrlen; | |
2098 | h_pos += meshhdrlen; | |
2099 | } | |
e4ab7eb0 | 2100 | #endif |
33b64eb2 | 2101 | |
065e9605 | 2102 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2103 | __le16 *qos_control; |
2104 | ||
2105 | qos_control = (__le16*) skb_push(skb, 2); | |
2106 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
2107 | /* | |
2108 | * Maybe we could actually set some fields here, for now just | |
2109 | * initialise to zero to indicate no special operation. | |
2110 | */ | |
2111 | *qos_control = 0; | |
2112 | } else | |
2113 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2114 | ||
e2ebc74d JB |
2115 | nh_pos += hdrlen; |
2116 | h_pos += hdrlen; | |
2117 | ||
68aae116 SH |
2118 | dev->stats.tx_packets++; |
2119 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2120 | |
2121 | /* Update skb pointers to various headers since this modified frame | |
2122 | * is going to go through Linux networking code that may potentially | |
2123 | * need things like pointer to IP header. */ | |
2124 | skb_set_mac_header(skb, 0); | |
2125 | skb_set_network_header(skb, nh_pos); | |
2126 | skb_set_transport_header(skb, h_pos); | |
2127 | ||
489ee919 | 2128 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2129 | memset(info, 0, sizeof(*info)); |
2130 | ||
e2ebc74d | 2131 | dev->trans_start = jiffies; |
a729cff8 JB |
2132 | |
2133 | info->flags = info_flags; | |
2134 | info->ack_frame_id = info_id; | |
2135 | ||
55de908a JB |
2136 | ieee80211_xmit(sdata, skb, band); |
2137 | rcu_read_unlock(); | |
e2ebc74d | 2138 | |
ec634fe3 | 2139 | return NETDEV_TX_OK; |
e2ebc74d | 2140 | |
55de908a JB |
2141 | fail_rcu: |
2142 | rcu_read_unlock(); | |
e2ebc74d | 2143 | fail: |
dcf33963 JB |
2144 | dev_kfree_skb(skb); |
2145 | return NETDEV_TX_OK; | |
e2ebc74d JB |
2146 | } |
2147 | ||
e2ebc74d | 2148 | |
e2530083 JB |
2149 | /* |
2150 | * ieee80211_clear_tx_pending may not be called in a context where | |
2151 | * it is possible that it packets could come in again. | |
2152 | */ | |
e2ebc74d JB |
2153 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2154 | { | |
1f98ab7f | 2155 | struct sk_buff *skb; |
2de8e0d9 | 2156 | int i; |
e2ebc74d | 2157 | |
1f98ab7f FF |
2158 | for (i = 0; i < local->hw.queues; i++) { |
2159 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2160 | ieee80211_free_txskb(&local->hw, skb); | |
2161 | } | |
e2ebc74d JB |
2162 | } |
2163 | ||
7bb45683 JB |
2164 | /* |
2165 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2166 | * which in this case means re-queued -- take as an indication to stop sending | |
2167 | * more pending frames. | |
2168 | */ | |
cd8ffc80 JB |
2169 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2170 | struct sk_buff *skb) | |
2171 | { | |
2172 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2173 | struct ieee80211_sub_if_data *sdata; | |
2174 | struct sta_info *sta; | |
2175 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2176 | bool result; |
55de908a | 2177 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2178 | |
5061b0c2 | 2179 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2180 | |
2181 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2182 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2183 | if (unlikely(!chanctx_conf)) { | |
2184 | dev_kfree_skb(skb); | |
2185 | return true; | |
2186 | } | |
2187 | result = ieee80211_tx(sdata, skb, true, | |
4bf88530 | 2188 | chanctx_conf->def.chan->band); |
cd8ffc80 | 2189 | } else { |
252b86c4 JB |
2190 | struct sk_buff_head skbs; |
2191 | ||
2192 | __skb_queue_head_init(&skbs); | |
2193 | __skb_queue_tail(&skbs, skb); | |
2194 | ||
cd8ffc80 | 2195 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2196 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2197 | |
74e4dbfd | 2198 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2199 | } |
2200 | ||
cd8ffc80 JB |
2201 | return result; |
2202 | } | |
2203 | ||
e2530083 | 2204 | /* |
3b8d81e0 | 2205 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2206 | */ |
e2ebc74d JB |
2207 | void ieee80211_tx_pending(unsigned long data) |
2208 | { | |
2209 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2210 | unsigned long flags; |
cd8ffc80 | 2211 | int i; |
3b8d81e0 | 2212 | bool txok; |
e2ebc74d | 2213 | |
f0e72851 | 2214 | rcu_read_lock(); |
e2530083 | 2215 | |
3b8d81e0 | 2216 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2217 | for (i = 0; i < local->hw.queues; i++) { |
2218 | /* | |
2219 | * If queue is stopped by something other than due to pending | |
2220 | * frames, or we have no pending frames, proceed to next queue. | |
2221 | */ | |
3b8d81e0 | 2222 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2223 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2224 | continue; |
e2530083 | 2225 | |
2a577d98 | 2226 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2227 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2228 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2229 | |
a7bc376c | 2230 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2231 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2232 | continue; |
2233 | } | |
2234 | ||
3b8d81e0 JB |
2235 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2236 | flags); | |
2237 | ||
2238 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2239 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2240 | flags); | |
2241 | if (!txok) | |
2a577d98 | 2242 | break; |
e2ebc74d | 2243 | } |
7236fe29 JB |
2244 | |
2245 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2246 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2247 | } |
3b8d81e0 | 2248 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2249 | |
f0e72851 | 2250 | rcu_read_unlock(); |
e2ebc74d JB |
2251 | } |
2252 | ||
2253 | /* functions for drivers to get certain frames */ | |
2254 | ||
eac70c13 MP |
2255 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2256 | struct ps_data *ps, struct sk_buff *skb) | |
e2ebc74d JB |
2257 | { |
2258 | u8 *pos, *tim; | |
2259 | int aid0 = 0; | |
2260 | int i, have_bits = 0, n1, n2; | |
2261 | ||
2262 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2263 | * mode. */ | |
d012a605 | 2264 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2265 | /* in the hope that this is faster than |
2266 | * checking byte-for-byte */ | |
d012a605 | 2267 | have_bits = !bitmap_empty((unsigned long*)ps->tim, |
e2ebc74d JB |
2268 | IEEE80211_MAX_AID+1); |
2269 | ||
d012a605 MP |
2270 | if (ps->dtim_count == 0) |
2271 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
e2ebc74d | 2272 | else |
d012a605 | 2273 | ps->dtim_count--; |
e2ebc74d JB |
2274 | |
2275 | tim = pos = (u8 *) skb_put(skb, 6); | |
2276 | *pos++ = WLAN_EID_TIM; | |
2277 | *pos++ = 4; | |
d012a605 | 2278 | *pos++ = ps->dtim_count; |
8860020e | 2279 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2280 | |
d012a605 | 2281 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2282 | aid0 = 1; |
2283 | ||
d012a605 | 2284 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2285 | |
e2ebc74d JB |
2286 | if (have_bits) { |
2287 | /* Find largest even number N1 so that bits numbered 1 through | |
2288 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2289 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2290 | n1 = 0; | |
2291 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2292 | if (ps->tim[i]) { |
e2ebc74d JB |
2293 | n1 = i & 0xfe; |
2294 | break; | |
2295 | } | |
2296 | } | |
2297 | n2 = n1; | |
2298 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2299 | if (ps->tim[i]) { |
e2ebc74d JB |
2300 | n2 = i; |
2301 | break; | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | /* Bitmap control */ | |
2306 | *pos++ = n1 | aid0; | |
2307 | /* Part Virt Bitmap */ | |
5220da39 | 2308 | skb_put(skb, n2 - n1); |
d012a605 | 2309 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2310 | |
2311 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2312 | } else { |
2313 | *pos++ = aid0; /* Bitmap control */ | |
2314 | *pos++ = 0; /* Part Virt Bitmap */ | |
2315 | } | |
e2ebc74d JB |
2316 | } |
2317 | ||
eac70c13 MP |
2318 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2319 | struct ps_data *ps, struct sk_buff *skb) | |
2320 | { | |
2321 | struct ieee80211_local *local = sdata->local; | |
2322 | ||
2323 | /* | |
2324 | * Not very nice, but we want to allow the driver to call | |
2325 | * ieee80211_beacon_get() as a response to the set_tim() | |
2326 | * callback. That, however, is already invoked under the | |
2327 | * sta_lock to guarantee consistent and race-free update | |
2328 | * of the tim bitmap in mac80211 and the driver. | |
2329 | */ | |
2330 | if (local->tim_in_locked_section) { | |
2331 | __ieee80211_beacon_add_tim(sdata, ps, skb); | |
2332 | } else { | |
1b91731d | 2333 | spin_lock_bh(&local->tim_lock); |
eac70c13 | 2334 | __ieee80211_beacon_add_tim(sdata, ps, skb); |
1b91731d | 2335 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2336 | } |
2337 | ||
2338 | return 0; | |
2339 | } | |
2340 | ||
73da7d5b SW |
2341 | void ieee80211_csa_finish(struct ieee80211_vif *vif) |
2342 | { | |
2343 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2344 | ||
2345 | ieee80211_queue_work(&sdata->local->hw, | |
2346 | &sdata->csa_finalize_work); | |
2347 | } | |
2348 | EXPORT_SYMBOL(ieee80211_csa_finish); | |
2349 | ||
2350 | static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata, | |
2351 | struct beacon_data *beacon) | |
2352 | { | |
2353 | struct probe_resp *resp; | |
2354 | int counter_offset_beacon = sdata->csa_counter_offset_beacon; | |
2355 | int counter_offset_presp = sdata->csa_counter_offset_presp; | |
2356 | ||
2357 | /* warn if the driver did not check for/react to csa completeness */ | |
2358 | if (WARN_ON(((u8 *)beacon->tail)[counter_offset_beacon] == 0)) | |
2359 | return; | |
2360 | ||
2361 | ((u8 *)beacon->tail)[counter_offset_beacon]--; | |
2362 | ||
2363 | if (sdata->vif.type == NL80211_IFTYPE_AP && | |
2364 | counter_offset_presp) { | |
2365 | rcu_read_lock(); | |
2366 | resp = rcu_dereference(sdata->u.ap.probe_resp); | |
2367 | ||
2368 | /* if nl80211 accepted the offset, this should not happen. */ | |
2369 | if (WARN_ON(!resp)) { | |
2370 | rcu_read_unlock(); | |
2371 | return; | |
2372 | } | |
2373 | resp->data[counter_offset_presp]--; | |
2374 | rcu_read_unlock(); | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
2379 | { | |
2380 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2381 | struct beacon_data *beacon = NULL; | |
2382 | u8 *beacon_data; | |
2383 | size_t beacon_data_len; | |
2384 | int counter_beacon = sdata->csa_counter_offset_beacon; | |
2385 | int ret = false; | |
2386 | ||
2387 | if (!ieee80211_sdata_running(sdata)) | |
2388 | return false; | |
2389 | ||
2390 | rcu_read_lock(); | |
2391 | if (vif->type == NL80211_IFTYPE_AP) { | |
2392 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
2393 | ||
2394 | beacon = rcu_dereference(ap->beacon); | |
2395 | if (WARN_ON(!beacon || !beacon->tail)) | |
2396 | goto out; | |
2397 | beacon_data = beacon->tail; | |
2398 | beacon_data_len = beacon->tail_len; | |
2399 | } else { | |
2400 | WARN_ON(1); | |
2401 | goto out; | |
2402 | } | |
2403 | ||
2404 | if (WARN_ON(counter_beacon > beacon_data_len)) | |
2405 | goto out; | |
2406 | ||
2407 | if (beacon_data[counter_beacon] == 0) | |
2408 | ret = true; | |
2409 | out: | |
2410 | rcu_read_unlock(); | |
2411 | ||
2412 | return ret; | |
2413 | } | |
2414 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
2415 | ||
eddcbb94 JB |
2416 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2417 | struct ieee80211_vif *vif, | |
2418 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2419 | { |
2420 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2421 | struct sk_buff *skb = NULL; |
e039fa4a | 2422 | struct ieee80211_tx_info *info; |
e2ebc74d | 2423 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2424 | enum ieee80211_band band; |
e00cfce0 | 2425 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2426 | struct ieee80211_chanctx_conf *chanctx_conf; |
8318d78a | 2427 | |
5dfdaf58 | 2428 | rcu_read_lock(); |
e2ebc74d | 2429 | |
32bfd35d | 2430 | sdata = vif_to_sdata(vif); |
55de908a | 2431 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2432 | |
55de908a | 2433 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2434 | goto out; |
2435 | ||
eddcbb94 JB |
2436 | if (tim_offset) |
2437 | *tim_offset = 0; | |
2438 | if (tim_length) | |
2439 | *tim_length = 0; | |
2440 | ||
05c914fe | 2441 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 MP |
2442 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
2443 | struct beacon_data *beacon = rcu_dereference(ap->beacon); | |
2444 | ||
3ad97fbc | 2445 | if (beacon) { |
73da7d5b SW |
2446 | if (sdata->vif.csa_active) |
2447 | ieee80211_update_csa(sdata, beacon); | |
2448 | ||
902acc78 JB |
2449 | /* |
2450 | * headroom, head length, | |
2451 | * tail length and maximum TIM length | |
2452 | */ | |
2453 | skb = dev_alloc_skb(local->tx_headroom + | |
2454 | beacon->head_len + | |
2455 | beacon->tail_len + 256); | |
2456 | if (!skb) | |
2457 | goto out; | |
33b64eb2 | 2458 | |
902acc78 JB |
2459 | skb_reserve(skb, local->tx_headroom); |
2460 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2461 | beacon->head_len); | |
33b64eb2 | 2462 | |
eac70c13 | 2463 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb); |
33b64eb2 | 2464 | |
eddcbb94 JB |
2465 | if (tim_offset) |
2466 | *tim_offset = beacon->head_len; | |
2467 | if (tim_length) | |
2468 | *tim_length = skb->len - beacon->head_len; | |
2469 | ||
902acc78 JB |
2470 | if (beacon->tail) |
2471 | memcpy(skb_put(skb, beacon->tail_len), | |
2472 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2473 | } else |
2474 | goto out; | |
05c914fe | 2475 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2476 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2477 | struct ieee80211_hdr *hdr; |
c3ffeab4 | 2478 | struct beacon_data *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2479 | |
af8cdcd8 | 2480 | if (!presp) |
9d139c81 JB |
2481 | goto out; |
2482 | ||
c3ffeab4 | 2483 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
9d139c81 JB |
2484 | if (!skb) |
2485 | goto out; | |
c3ffeab4 JB |
2486 | skb_reserve(skb, local->tx_headroom); |
2487 | memcpy(skb_put(skb, presp->head_len), presp->head, | |
2488 | presp->head_len); | |
9d139c81 JB |
2489 | |
2490 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2491 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2492 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2493 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2494 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 2495 | struct beacon_data *bcn = rcu_dereference(ifmsh->beacon); |
472dbc45 | 2496 | |
2b5e1967 | 2497 | if (!bcn) |
ac1bd846 | 2498 | goto out; |
ac1bd846 | 2499 | |
dbf498fb JC |
2500 | if (ifmsh->sync_ops) |
2501 | ifmsh->sync_ops->adjust_tbtt( | |
2502 | sdata); | |
2503 | ||
3b69a9c5 | 2504 | skb = dev_alloc_skb(local->tx_headroom + |
2b5e1967 | 2505 | bcn->head_len + |
3f52b7e3 | 2506 | 256 + /* TIM IE */ |
2b5e1967 | 2507 | bcn->tail_len); |
902acc78 JB |
2508 | if (!skb) |
2509 | goto out; | |
2b5e1967 TP |
2510 | skb_reserve(skb, local->tx_headroom); |
2511 | memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len); | |
2512 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb); | |
2513 | memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len); | |
9d139c81 JB |
2514 | } else { |
2515 | WARN_ON(1); | |
5dfdaf58 | 2516 | goto out; |
e2ebc74d JB |
2517 | } |
2518 | ||
4bf88530 | 2519 | band = chanctx_conf->def.chan->band; |
55de908a | 2520 | |
e039fa4a JB |
2521 | info = IEEE80211_SKB_CB(skb); |
2522 | ||
3b8d81e0 | 2523 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2524 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2525 | info->band = band; |
e00cfce0 JM |
2526 | |
2527 | memset(&txrc, 0, sizeof(txrc)); | |
2528 | txrc.hw = hw; | |
e31583cd | 2529 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2530 | txrc.bss_conf = &sdata->vif.bss_conf; |
2531 | txrc.skb = skb; | |
2532 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2533 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2534 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2535 | txrc.max_rate_idx = -1; |
2536 | else | |
2537 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2538 | txrc.bss = true; |
e00cfce0 | 2539 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2540 | |
2541 | info->control.vif = vif; | |
f591fa5d | 2542 | |
a472e71b JL |
2543 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2544 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2545 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2546 | out: |
5dfdaf58 | 2547 | rcu_read_unlock(); |
e2ebc74d JB |
2548 | return skb; |
2549 | } | |
eddcbb94 | 2550 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2551 | |
02945821 AN |
2552 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2553 | struct ieee80211_vif *vif) | |
2554 | { | |
2555 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2556 | struct sk_buff *skb = NULL; |
2557 | struct probe_resp *presp = NULL; | |
02945821 AN |
2558 | struct ieee80211_hdr *hdr; |
2559 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2560 | ||
2561 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2562 | return NULL; | |
2563 | ||
2564 | rcu_read_lock(); | |
2565 | ||
2566 | ap = &sdata->u.ap; | |
2567 | presp = rcu_dereference(ap->probe_resp); | |
2568 | if (!presp) | |
2569 | goto out; | |
2570 | ||
aa7a0080 | 2571 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2572 | if (!skb) |
2573 | goto out; | |
2574 | ||
aa7a0080 ES |
2575 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2576 | ||
02945821 AN |
2577 | hdr = (struct ieee80211_hdr *) skb->data; |
2578 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2579 | ||
2580 | out: | |
2581 | rcu_read_unlock(); | |
2582 | return skb; | |
2583 | } | |
2584 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2585 | ||
7044cc56 KV |
2586 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2587 | struct ieee80211_vif *vif) | |
2588 | { | |
2589 | struct ieee80211_sub_if_data *sdata; | |
2590 | struct ieee80211_if_managed *ifmgd; | |
2591 | struct ieee80211_pspoll *pspoll; | |
2592 | struct ieee80211_local *local; | |
2593 | struct sk_buff *skb; | |
2594 | ||
2595 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2596 | return NULL; | |
2597 | ||
2598 | sdata = vif_to_sdata(vif); | |
2599 | ifmgd = &sdata->u.mgd; | |
2600 | local = sdata->local; | |
2601 | ||
2602 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2603 | if (!skb) |
7044cc56 | 2604 | return NULL; |
d15b8459 | 2605 | |
7044cc56 KV |
2606 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2607 | ||
2608 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2609 | memset(pspoll, 0, sizeof(*pspoll)); | |
2610 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2611 | IEEE80211_STYPE_PSPOLL); | |
2612 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2613 | ||
2614 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2615 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2616 | ||
2617 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2618 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2619 | ||
2620 | return skb; | |
2621 | } | |
2622 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2623 | ||
2624 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2625 | struct ieee80211_vif *vif) | |
2626 | { | |
2627 | struct ieee80211_hdr_3addr *nullfunc; | |
2628 | struct ieee80211_sub_if_data *sdata; | |
2629 | struct ieee80211_if_managed *ifmgd; | |
2630 | struct ieee80211_local *local; | |
2631 | struct sk_buff *skb; | |
2632 | ||
2633 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2634 | return NULL; | |
2635 | ||
2636 | sdata = vif_to_sdata(vif); | |
2637 | ifmgd = &sdata->u.mgd; | |
2638 | local = sdata->local; | |
2639 | ||
2640 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2641 | if (!skb) |
7044cc56 | 2642 | return NULL; |
d15b8459 | 2643 | |
7044cc56 KV |
2644 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2645 | ||
2646 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2647 | sizeof(*nullfunc)); | |
2648 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2649 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2650 | IEEE80211_STYPE_NULLFUNC | | |
2651 | IEEE80211_FCTL_TODS); | |
2652 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2653 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2654 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2655 | ||
2656 | return skb; | |
2657 | } | |
2658 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2659 | ||
05e54ea6 KV |
2660 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2661 | struct ieee80211_vif *vif, | |
2662 | const u8 *ssid, size_t ssid_len, | |
b9a9ada1 | 2663 | size_t tailroom) |
05e54ea6 KV |
2664 | { |
2665 | struct ieee80211_sub_if_data *sdata; | |
2666 | struct ieee80211_local *local; | |
2667 | struct ieee80211_hdr_3addr *hdr; | |
2668 | struct sk_buff *skb; | |
2669 | size_t ie_ssid_len; | |
2670 | u8 *pos; | |
2671 | ||
2672 | sdata = vif_to_sdata(vif); | |
2673 | local = sdata->local; | |
2674 | ie_ssid_len = 2 + ssid_len; | |
2675 | ||
2676 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2677 | ie_ssid_len + tailroom); |
d15b8459 | 2678 | if (!skb) |
05e54ea6 | 2679 | return NULL; |
05e54ea6 KV |
2680 | |
2681 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2682 | ||
2683 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2684 | memset(hdr, 0, sizeof(*hdr)); | |
2685 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2686 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 2687 | eth_broadcast_addr(hdr->addr1); |
05e54ea6 | 2688 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
e83e6541 | 2689 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
2690 | |
2691 | pos = skb_put(skb, ie_ssid_len); | |
2692 | *pos++ = WLAN_EID_SSID; | |
2693 | *pos++ = ssid_len; | |
88c868c4 | 2694 | if (ssid_len) |
05e54ea6 KV |
2695 | memcpy(pos, ssid, ssid_len); |
2696 | pos += ssid_len; | |
2697 | ||
05e54ea6 KV |
2698 | return skb; |
2699 | } | |
2700 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2701 | ||
32bfd35d | 2702 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2703 | const void *frame, size_t frame_len, |
e039fa4a | 2704 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2705 | struct ieee80211_rts *rts) |
2706 | { | |
2707 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2708 | |
065e9605 HH |
2709 | rts->frame_control = |
2710 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2711 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2712 | frame_txctl); | |
e2ebc74d JB |
2713 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2714 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2715 | } | |
2716 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2717 | ||
32bfd35d | 2718 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2719 | const void *frame, size_t frame_len, |
e039fa4a | 2720 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2721 | struct ieee80211_cts *cts) |
2722 | { | |
2723 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2724 | |
065e9605 HH |
2725 | cts->frame_control = |
2726 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2727 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2728 | frame_len, frame_txctl); | |
e2ebc74d JB |
2729 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2730 | } | |
2731 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2732 | ||
2733 | struct sk_buff * | |
32bfd35d | 2734 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2735 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2736 | { |
2737 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2738 | struct sk_buff *skb = NULL; |
5cf121c3 | 2739 | struct ieee80211_tx_data tx; |
e2ebc74d | 2740 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 2741 | struct ps_data *ps; |
e039fa4a | 2742 | struct ieee80211_tx_info *info; |
55de908a | 2743 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 2744 | |
32bfd35d | 2745 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 2746 | |
5dfdaf58 | 2747 | rcu_read_lock(); |
55de908a | 2748 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 2749 | |
d012a605 MP |
2750 | if (!chanctx_conf) |
2751 | goto out; | |
2752 | ||
2753 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
2754 | struct beacon_data *beacon = | |
2755 | rcu_dereference(sdata->u.ap.beacon); | |
2756 | ||
2757 | if (!beacon || !beacon->head) | |
2758 | goto out; | |
2759 | ||
2760 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
2761 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2762 | ps = &sdata->u.mesh.ps; | |
d012a605 | 2763 | } else { |
747cf5e9 | 2764 | goto out; |
d012a605 | 2765 | } |
5dfdaf58 | 2766 | |
d012a605 | 2767 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 2768 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2769 | |
e2ebc74d | 2770 | while (1) { |
d012a605 | 2771 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 2772 | if (!skb) |
747cf5e9 | 2773 | goto out; |
e2ebc74d JB |
2774 | local->total_ps_buffered--; |
2775 | ||
d012a605 | 2776 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
2777 | struct ieee80211_hdr *hdr = |
2778 | (struct ieee80211_hdr *) skb->data; | |
2779 | /* more buffered multicast/broadcast frames ==> set | |
2780 | * MoreData flag in IEEE 802.11 header to inform PS | |
2781 | * STAs */ | |
2782 | hdr->frame_control |= | |
2783 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2784 | } | |
2785 | ||
7cbf9d01 MP |
2786 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
2787 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); | |
3b8d81e0 | 2788 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2789 | break; |
2790 | dev_kfree_skb_any(skb); | |
2791 | } | |
e039fa4a JB |
2792 | |
2793 | info = IEEE80211_SKB_CB(skb); | |
2794 | ||
5cf121c3 | 2795 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 2796 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 2797 | |
97b045d6 | 2798 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2799 | skb = NULL; |
97b045d6 | 2800 | out: |
d0709a65 | 2801 | rcu_read_unlock(); |
e2ebc74d JB |
2802 | |
2803 | return skb; | |
2804 | } | |
2805 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2806 | |
55de908a JB |
2807 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
2808 | struct sk_buff *skb, int tid, | |
2809 | enum ieee80211_band band) | |
3b8d81e0 | 2810 | { |
353d09c6 | 2811 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 2812 | |
3b8d81e0 JB |
2813 | skb_set_mac_header(skb, 0); |
2814 | skb_set_network_header(skb, 0); | |
2815 | skb_set_transport_header(skb, 0); | |
2816 | ||
3a25a8c8 | 2817 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 2818 | skb->priority = tid; |
cf0277e7 | 2819 | |
89afe614 JB |
2820 | skb->dev = sdata->dev; |
2821 | ||
3d34deb6 JB |
2822 | /* |
2823 | * The other path calling ieee80211_xmit is from the tasklet, | |
2824 | * and while we can handle concurrent transmissions locking | |
2825 | * requirements are that we do not come into tx with bhs on. | |
2826 | */ | |
2827 | local_bh_disable(); | |
55de908a | 2828 | ieee80211_xmit(sdata, skb, band); |
3d34deb6 | 2829 | local_bh_enable(); |
3b8d81e0 | 2830 | } |