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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 JB |
42 | { |
43 | int rate, mrate, erp, dur, i; | |
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); |
e6a9854b JB |
49 | |
50 | /* assume HW handles this */ | |
51 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS) | |
52 | return 0; | |
53 | ||
54 | /* uh huh? */ | |
55 | if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) | |
56 | return 0; | |
e2ebc74d | 57 | |
2d56577b | 58 | sband = local->hw.wiphy->bands[info->band]; |
e6a9854b | 59 | txrate = &sband->bitrates[info->control.rates[0].idx]; |
8318d78a | 60 | |
e6a9854b | 61 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
62 | |
63 | /* | |
64 | * data and mgmt (except PS Poll): | |
65 | * - during CFP: 32768 | |
66 | * - during contention period: | |
67 | * if addr1 is group address: 0 | |
68 | * if more fragments = 0 and addr1 is individual address: time to | |
69 | * transmit one ACK plus SIFS | |
70 | * if more fragments = 1 and addr1 is individual address: time to | |
71 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
72 | * | |
73 | * IEEE 802.11, 9.6: | |
74 | * - control response frame (CTS or ACK) shall be transmitted using the | |
75 | * same rate as the immediately previous frame in the frame exchange | |
76 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
77 | * at the highest possible rate belonging to the PHY rates in the | |
78 | * BSSBasicRateSet | |
79 | */ | |
252b86c4 | 80 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 81 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 82 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 83 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
84 | * needs to be updated to support duration field calculation. |
85 | * | |
86 | * RTS: time needed to transmit pending data/mgmt frame plus | |
87 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
88 | * CTS: duration of immediately previous RTS minus time | |
89 | * required to transmit CTS and its SIFS | |
90 | * ACK: 0 if immediately previous directed data/mgmt had | |
91 | * more=0, with more=1 duration in ACK frame is duration | |
92 | * from previous frame minus time needed to transmit ACK | |
93 | * and its SIFS | |
94 | * PS Poll: BIT(15) | BIT(14) | aid | |
95 | */ | |
96 | return 0; | |
97 | } | |
98 | ||
99 | /* data/mgmt */ | |
100 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 101 | return cpu_to_le16(32768); |
e2ebc74d JB |
102 | |
103 | if (group_addr) /* Group address as the destination - no ACK */ | |
104 | return 0; | |
105 | ||
106 | /* Individual destination address: | |
107 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
108 | * CTS and ACK frames shall be transmitted using the highest rate in | |
109 | * basic rate set that is less than or equal to the rate of the | |
110 | * immediately previous frame and that is using the same modulation | |
111 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
112 | * the highest mandatory rate of the PHY that is less than or equal to | |
113 | * the rate of the previous frame is used. | |
114 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
115 | */ | |
116 | rate = -1; | |
8318d78a JB |
117 | /* use lowest available if everything fails */ |
118 | mrate = sband->bitrates[0].bitrate; | |
119 | for (i = 0; i < sband->n_bitrates; i++) { | |
120 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 121 | |
8318d78a JB |
122 | if (r->bitrate > txrate->bitrate) |
123 | break; | |
e2ebc74d | 124 | |
bda3933a | 125 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
8318d78a JB |
126 | rate = r->bitrate; |
127 | ||
128 | switch (sband->band) { | |
129 | case IEEE80211_BAND_2GHZ: { | |
130 | u32 flag; | |
131 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
132 | flag = IEEE80211_RATE_MANDATORY_G; | |
133 | else | |
134 | flag = IEEE80211_RATE_MANDATORY_B; | |
135 | if (r->flags & flag) | |
136 | mrate = r->bitrate; | |
137 | break; | |
138 | } | |
139 | case IEEE80211_BAND_5GHZ: | |
140 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
141 | mrate = r->bitrate; | |
142 | break; | |
3a0c52a6 VK |
143 | case IEEE80211_BAND_60GHZ: |
144 | /* TODO, for now fall through */ | |
8318d78a JB |
145 | case IEEE80211_NUM_BANDS: |
146 | WARN_ON(1); | |
147 | break; | |
148 | } | |
e2ebc74d JB |
149 | } |
150 | if (rate == -1) { | |
151 | /* No matching basic rate found; use highest suitable mandatory | |
152 | * PHY rate */ | |
153 | rate = mrate; | |
154 | } | |
155 | ||
6674f210 SW |
156 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
157 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 158 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
159 | dur = 0; |
160 | else | |
161 | /* Time needed to transmit ACK | |
162 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
163 | * to closest integer */ | |
4ee73f33 | 164 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
bda3933a | 165 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
166 | |
167 | if (next_frag_len) { | |
168 | /* Frame is fragmented: duration increases with time needed to | |
169 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
170 | dur *= 2; /* ACK + SIFS */ | |
171 | /* next fragment */ | |
4ee73f33 | 172 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 173 | txrate->bitrate, erp, |
bda3933a | 174 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
175 | } |
176 | ||
03f93c3d | 177 | return cpu_to_le16(dur); |
e2ebc74d JB |
178 | } |
179 | ||
e2ebc74d | 180 | /* tx handlers */ |
5c1b98a5 KV |
181 | static ieee80211_tx_result debug_noinline |
182 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
183 | { | |
184 | struct ieee80211_local *local = tx->local; | |
0c74211d | 185 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
186 | |
187 | /* driver doesn't support power save */ | |
188 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
189 | return TX_CONTINUE; | |
190 | ||
191 | /* hardware does dynamic power save */ | |
192 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
193 | return TX_CONTINUE; | |
194 | ||
195 | /* dynamic power save disabled */ | |
196 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
197 | return TX_CONTINUE; | |
198 | ||
199 | /* we are scanning, don't enable power save */ | |
200 | if (local->scanning) | |
201 | return TX_CONTINUE; | |
202 | ||
203 | if (!local->ps_sdata) | |
204 | return TX_CONTINUE; | |
205 | ||
206 | /* No point if we're going to suspend */ | |
207 | if (local->quiescing) | |
208 | return TX_CONTINUE; | |
209 | ||
0c74211d KV |
210 | /* dynamic ps is supported only in managed mode */ |
211 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
212 | return TX_CONTINUE; | |
213 | ||
214 | ifmgd = &tx->sdata->u.mgd; | |
215 | ||
216 | /* | |
217 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
218 | * u-apsd enabled and the frame is in voip class. This effectively | |
219 | * means that even if all access categories have u-apsd enabled, in | |
220 | * practise u-apsd is only used with the voip ac. This is a | |
221 | * workaround for the case when received voip class packets do not | |
222 | * have correct qos tag for some reason, due the network or the | |
223 | * peer application. | |
224 | * | |
dc41e4d4 | 225 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
226 | * changed via debugfs, user needs to reassociate manually to have |
227 | * everything in sync. | |
228 | */ | |
4875d30d JB |
229 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
230 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
231 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
232 | return TX_CONTINUE; |
233 | ||
5c1b98a5 KV |
234 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
235 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 236 | IEEE80211_MAX_QUEUE_MAP, |
5c1b98a5 | 237 | IEEE80211_QUEUE_STOP_REASON_PS); |
db28569a | 238 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
239 | ieee80211_queue_work(&local->hw, |
240 | &local->dynamic_ps_disable_work); | |
241 | } | |
242 | ||
5db1c07c LC |
243 | /* Don't restart the timer if we're not disassociated */ |
244 | if (!ifmgd->associated) | |
245 | return TX_CONTINUE; | |
246 | ||
5c1b98a5 KV |
247 | mod_timer(&local->dynamic_ps_timer, jiffies + |
248 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
249 | ||
250 | return TX_CONTINUE; | |
251 | } | |
e2ebc74d | 252 | |
d9e8a70f | 253 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 254 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 255 | { |
358c8d9d | 256 | |
e039fa4a | 257 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 258 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 259 | bool assoc = false; |
e2ebc74d | 260 | |
e039fa4a | 261 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 262 | return TX_CONTINUE; |
58d4185e | 263 | |
b23b025f BG |
264 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
265 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
266 | !ieee80211_is_probe_req(hdr->frame_control) && |
267 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
268 | /* | |
269 | * When software scanning only nullfunc frames (to notify | |
270 | * the sleep state to the AP) and probe requests (for the | |
271 | * active scan) are allowed, all other frames should not be | |
272 | * sent and we should not get here, but if we do | |
273 | * nonetheless, drop them to avoid sending them | |
274 | * off-channel. See the link below and | |
275 | * ieee80211_start_scan() for more. | |
276 | * | |
277 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
278 | */ | |
9ae54c84 | 279 | return TX_DROP; |
e2ebc74d | 280 | |
1be7fe8d BJ |
281 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
282 | return TX_CONTINUE; | |
283 | ||
05c914fe | 284 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
285 | return TX_CONTINUE; |
286 | ||
5cf121c3 | 287 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 288 | return TX_CONTINUE; |
e2ebc74d | 289 | |
c2c98fde JB |
290 | if (tx->sta) |
291 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 292 | |
5cf121c3 | 293 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 294 | if (unlikely(!assoc && |
358c8d9d | 295 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 296 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
297 | sdata_info(tx->sdata, |
298 | "dropped data frame to not associated station %pM\n", | |
299 | hdr->addr1); | |
300 | #endif | |
e2ebc74d | 301 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 302 | return TX_DROP; |
e2ebc74d | 303 | } |
29623892 JB |
304 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
305 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 306 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
307 | /* |
308 | * No associated STAs - no need to send multicast | |
309 | * frames. | |
310 | */ | |
311 | return TX_DROP; | |
e2ebc74d JB |
312 | } |
313 | ||
9ae54c84 | 314 | return TX_CONTINUE; |
e2ebc74d JB |
315 | } |
316 | ||
e2ebc74d JB |
317 | /* This function is called whenever the AP is about to exceed the maximum limit |
318 | * of buffered frames for power saving STAs. This situation should not really | |
319 | * happen often during normal operation, so dropping the oldest buffered packet | |
320 | * from each queue should be OK to make some room for new frames. */ | |
321 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
322 | { | |
323 | int total = 0, purged = 0; | |
324 | struct sk_buff *skb; | |
325 | struct ieee80211_sub_if_data *sdata; | |
326 | struct sta_info *sta; | |
327 | ||
79010420 | 328 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
329 | struct ps_data *ps; |
330 | ||
331 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
332 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
333 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
334 | ps = &sdata->u.mesh.ps; | |
d012a605 | 335 | else |
e2ebc74d | 336 | continue; |
d012a605 MP |
337 | |
338 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
339 | if (skb) { |
340 | purged++; | |
341 | dev_kfree_skb(skb); | |
342 | } | |
d012a605 | 343 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 344 | } |
e2ebc74d | 345 | |
948d887d JB |
346 | /* |
347 | * Drop one frame from each station from the lowest-priority | |
348 | * AC that has frames at all. | |
349 | */ | |
d0709a65 | 350 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
351 | int ac; |
352 | ||
353 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
354 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
355 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
356 | if (skb) { | |
357 | purged++; | |
c3e7724b | 358 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
359 | break; |
360 | } | |
e2ebc74d | 361 | } |
e2ebc74d | 362 | } |
d0709a65 | 363 | |
e2ebc74d | 364 | local->total_ps_buffered = total; |
bdcbd8e0 | 365 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
366 | } |
367 | ||
9ae54c84 | 368 | static ieee80211_tx_result |
5cf121c3 | 369 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 370 | { |
e039fa4a | 371 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 372 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 373 | struct ps_data *ps; |
e039fa4a | 374 | |
7d54d0dd JB |
375 | /* |
376 | * broadcast/multicast frame | |
377 | * | |
3f52b7e3 | 378 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
379 | * the frame is buffered to be sent after DTIM beacon frame. |
380 | * This is done either by the hardware or us. | |
381 | */ | |
382 | ||
3f52b7e3 | 383 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
384 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
385 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
386 | if (!tx->sdata->bss) | |
387 | return TX_CONTINUE; | |
388 | ||
389 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
390 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
391 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 392 | } else { |
3e122be0 | 393 | return TX_CONTINUE; |
d012a605 MP |
394 | } |
395 | ||
3e122be0 JB |
396 | |
397 | /* no buffering for ordered frames */ | |
358c8d9d | 398 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 399 | return TX_CONTINUE; |
7d54d0dd JB |
400 | |
401 | /* no stations in PS mode */ | |
d012a605 | 402 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 403 | return TX_CONTINUE; |
7d54d0dd | 404 | |
62b517cb | 405 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
3a25a8c8 JB |
406 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
407 | info->hw_queue = tx->sdata->vif.cab_queue; | |
62b1208e | 408 | |
62b517cb JB |
409 | /* device releases frame after DTIM beacon */ |
410 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 411 | return TX_CONTINUE; |
62b1208e | 412 | |
7d54d0dd | 413 | /* buffered in mac80211 */ |
62b1208e JB |
414 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
415 | purge_old_ps_buffers(tx->local); | |
416 | ||
d012a605 | 417 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
418 | ps_dbg(tx->sdata, |
419 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 420 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
421 | } else |
422 | tx->local->total_ps_buffered++; | |
e2ebc74d | 423 | |
d012a605 | 424 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 425 | |
62b1208e | 426 | return TX_QUEUED; |
e2ebc74d JB |
427 | } |
428 | ||
fb733336 JM |
429 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
430 | struct sk_buff *skb) | |
431 | { | |
432 | if (!ieee80211_is_mgmt(fc)) | |
433 | return 0; | |
434 | ||
c2c98fde | 435 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
436 | return 0; |
437 | ||
438 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
439 | skb->data)) | |
440 | return 0; | |
441 | ||
442 | return 1; | |
443 | } | |
444 | ||
9ae54c84 | 445 | static ieee80211_tx_result |
5cf121c3 | 446 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
447 | { |
448 | struct sta_info *sta = tx->sta; | |
e039fa4a | 449 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 450 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 451 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 452 | |
02f2f1a9 | 453 | if (unlikely(!sta)) |
9ae54c84 | 454 | return TX_CONTINUE; |
e2ebc74d | 455 | |
c2c98fde JB |
456 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
457 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && | |
02f2f1a9 | 458 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
459 | int ac = skb_get_queue_mapping(tx->skb); |
460 | ||
02f2f1a9 JB |
461 | /* only deauth, disassoc and action are bufferable MMPDUs */ |
462 | if (ieee80211_is_mgmt(hdr->frame_control) && | |
463 | !ieee80211_is_deauth(hdr->frame_control) && | |
464 | !ieee80211_is_disassoc(hdr->frame_control) && | |
465 | !ieee80211_is_action(hdr->frame_control)) { | |
466 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
467 | return TX_CONTINUE; | |
468 | } | |
469 | ||
bdcbd8e0 JB |
470 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
471 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
472 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
473 | purge_old_ps_buffers(tx->local); | |
948d887d JB |
474 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
475 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
476 | ps_dbg(tx->sdata, |
477 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
478 | sta->sta.addr, ac); | |
c3e7724b | 479 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
480 | } else |
481 | tx->local->total_ps_buffered++; | |
004c872e | 482 | |
e039fa4a | 483 | info->control.jiffies = jiffies; |
5061b0c2 | 484 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 485 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
948d887d | 486 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
3393a608 JO |
487 | |
488 | if (!timer_pending(&local->sta_cleanup)) | |
489 | mod_timer(&local->sta_cleanup, | |
490 | round_jiffies(jiffies + | |
491 | STA_INFO_CLEANUP_INTERVAL)); | |
492 | ||
c868cb35 JB |
493 | /* |
494 | * We queued up some frames, so the TIM bit might | |
495 | * need to be set, recalculate it. | |
496 | */ | |
497 | sta_info_recalc_tim(sta); | |
498 | ||
9ae54c84 | 499 | return TX_QUEUED; |
bdcbd8e0 JB |
500 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
501 | ps_dbg(tx->sdata, | |
502 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
503 | sta->sta.addr); | |
e2ebc74d | 504 | } |
e2ebc74d | 505 | |
9ae54c84 | 506 | return TX_CONTINUE; |
e2ebc74d JB |
507 | } |
508 | ||
d9e8a70f | 509 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 510 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 511 | { |
5cf121c3 | 512 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 513 | return TX_CONTINUE; |
e2ebc74d | 514 | |
5cf121c3 | 515 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
516 | return ieee80211_tx_h_unicast_ps_buf(tx); |
517 | else | |
518 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
519 | } | |
520 | ||
a621fa4d JB |
521 | static ieee80211_tx_result debug_noinline |
522 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
523 | { | |
524 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
525 | ||
526 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
527 | tx->sdata->control_port_no_encrypt)) | |
528 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
529 | ||
530 | return TX_CONTINUE; | |
531 | } | |
532 | ||
d9e8a70f | 533 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 534 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 535 | { |
46e6de15 | 536 | struct ieee80211_key *key; |
e039fa4a | 537 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 538 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 539 | |
3b8d81e0 | 540 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 541 | tx->key = NULL; |
e31b8213 | 542 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 543 | tx->key = key; |
3cfcf6ac | 544 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
545 | is_multicast_ether_addr(hdr->addr1) && |
546 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
547 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
548 | tx->key = key; | |
f7e0104c JB |
549 | else if (is_multicast_ether_addr(hdr->addr1) && |
550 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
551 | tx->key = key; | |
552 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
553 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 554 | tx->key = key; |
46e6de15 JB |
555 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
556 | tx->key = NULL; | |
557 | else if (!tx->sdata->drop_unencrypted) | |
558 | tx->key = NULL; | |
559 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
560 | tx->key = NULL; | |
561 | else if (ieee80211_is_robust_mgmt_frame(hdr) && | |
562 | !(ieee80211_is_action(hdr->frame_control) && | |
563 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
564 | tx->key = NULL; | |
4922f71f NC |
565 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
566 | !ieee80211_is_robust_mgmt_frame(hdr)) | |
567 | tx->key = NULL; | |
46e6de15 | 568 | else { |
e2ebc74d | 569 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 570 | return TX_DROP; |
46e6de15 | 571 | } |
e2ebc74d JB |
572 | |
573 | if (tx->key) { | |
813d7669 JB |
574 | bool skip_hw = false; |
575 | ||
e2ebc74d | 576 | tx->key->tx_rx_count++; |
011bfcc4 | 577 | /* TODO: add threshold stuff again */ |
176e4f84 | 578 | |
97359d12 JB |
579 | switch (tx->key->conf.cipher) { |
580 | case WLAN_CIPHER_SUITE_WEP40: | |
581 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 582 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 583 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
584 | tx->key = NULL; |
585 | break; | |
97359d12 | 586 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
587 | if (!ieee80211_is_data_present(hdr->frame_control) && |
588 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
589 | tx->skb)) | |
590 | tx->key = NULL; | |
3b43a187 KV |
591 | else |
592 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 593 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 594 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 595 | break; |
97359d12 | 596 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
597 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
598 | tx->key = NULL; | |
599 | break; | |
176e4f84 | 600 | } |
813d7669 | 601 | |
e54faf29 JB |
602 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
603 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
604 | return TX_DROP; |
605 | ||
f12553eb | 606 | if (!skip_hw && tx->key && |
382b1655 | 607 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 608 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
609 | } |
610 | ||
9ae54c84 | 611 | return TX_CONTINUE; |
e2ebc74d JB |
612 | } |
613 | ||
d9e8a70f | 614 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 615 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 616 | { |
e039fa4a | 617 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
618 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
619 | struct ieee80211_supported_band *sband; | |
620 | struct ieee80211_rate *rate; | |
a2c40249 SZ |
621 | int i; |
622 | u32 len; | |
e6a9854b JB |
623 | bool inval = false, rts = false, short_preamble = false; |
624 | struct ieee80211_tx_rate_control txrc; | |
c2c98fde | 625 | bool assoc = false; |
8318d78a | 626 | |
e6a9854b | 627 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 628 | |
2d56577b | 629 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 630 | |
a2c40249 | 631 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 632 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
633 | |
634 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 635 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
636 | txrc.sband = sband; |
637 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
638 | txrc.skb = tx->skb; | |
639 | txrc.reported_rate.idx = -1; | |
2d56577b | 640 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
641 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
642 | txrc.max_rate_idx = -1; | |
643 | else | |
644 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
19468413 | 645 | memcpy(txrc.rate_idx_mcs_mask, |
2d56577b | 646 | tx->sdata->rc_rateidx_mcs_mask[info->band], |
19468413 | 647 | sizeof(txrc.rate_idx_mcs_mask)); |
8f0729b1 | 648 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 649 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 650 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
651 | |
652 | /* set up RTS protection if desired */ | |
b9a5f8ca | 653 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 654 | txrc.rts = rts = true; |
e2ebc74d | 655 | } |
e2ebc74d | 656 | |
e6a9854b JB |
657 | /* |
658 | * Use short preamble if the BSS can handle it, but not for | |
659 | * management frames unless we know the receiver can handle | |
660 | * that -- the management frame might be to a station that | |
661 | * just wants a probe response. | |
662 | */ | |
663 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
664 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 665 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
e6a9854b | 666 | txrc.short_preamble = short_preamble = true; |
e2ebc74d | 667 | |
c2c98fde JB |
668 | if (tx->sta) |
669 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
670 | |
671 | /* | |
672 | * Lets not bother rate control if we're associated and cannot | |
673 | * talk to the sta. This should not happen. | |
674 | */ | |
c2c98fde | 675 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
676 | !rate_usable_index_exists(sband, &tx->sta->sta), |
677 | "%s: Dropped data frame as no usable bitrate found while " | |
678 | "scanning and associated. Target station: " | |
679 | "%pM on %d GHz band\n", | |
47846c9b | 680 | tx->sdata->name, hdr->addr1, |
2d56577b | 681 | info->band ? 5 : 2)) |
b770b43e | 682 | return TX_DROP; |
2e92e6f2 | 683 | |
b770b43e LR |
684 | /* |
685 | * If we're associated with the sta at this point we know we can at | |
686 | * least send the frame at the lowest bit rate. | |
687 | */ | |
e6a9854b JB |
688 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
689 | ||
690 | if (unlikely(info->control.rates[0].idx < 0)) | |
691 | return TX_DROP; | |
692 | ||
c1ce5a74 | 693 | if (txrc.reported_rate.idx < 0) { |
e6a9854b | 694 | txrc.reported_rate = info->control.rates[0]; |
c1ce5a74 HS |
695 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
696 | tx->sta->last_tx_rate = txrc.reported_rate; | |
697 | } else if (tx->sta) | |
e6a9854b | 698 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 699 | |
e6a9854b JB |
700 | if (unlikely(!info->control.rates[0].count)) |
701 | info->control.rates[0].count = 1; | |
e2ebc74d | 702 | |
9955151d GS |
703 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
704 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
705 | info->control.rates[0].count = 1; | |
706 | ||
e6a9854b JB |
707 | if (is_multicast_ether_addr(hdr->addr1)) { |
708 | /* | |
709 | * XXX: verify the rate is in the basic rateset | |
710 | */ | |
711 | return TX_CONTINUE; | |
e2ebc74d JB |
712 | } |
713 | ||
e6a9854b JB |
714 | /* |
715 | * set up the RTS/CTS rate as the fastest basic rate | |
716 | * that is not faster than the data rate | |
717 | * | |
718 | * XXX: Should this check all retry rates? | |
719 | */ | |
720 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
721 | s8 baserate = 0; | |
722 | ||
723 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
724 | ||
725 | for (i = 0; i < sband->n_bitrates; i++) { | |
726 | /* must be a basic rate */ | |
727 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
728 | continue; | |
729 | /* must not be faster than the data rate */ | |
730 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
731 | continue; | |
732 | /* maximum */ | |
733 | if (sband->bitrates[baserate].bitrate < | |
734 | sband->bitrates[i].bitrate) | |
735 | baserate = i; | |
736 | } | |
737 | ||
738 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
739 | } |
740 | ||
e6a9854b JB |
741 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
742 | /* | |
743 | * make sure there's no valid rate following | |
744 | * an invalid one, just in case drivers don't | |
745 | * take the API seriously to stop at -1. | |
746 | */ | |
747 | if (inval) { | |
748 | info->control.rates[i].idx = -1; | |
749 | continue; | |
750 | } | |
751 | if (info->control.rates[i].idx < 0) { | |
752 | inval = true; | |
753 | continue; | |
754 | } | |
8318d78a | 755 | |
e6a9854b JB |
756 | /* |
757 | * For now assume MCS is already set up correctly, this | |
758 | * needs to be fixed. | |
759 | */ | |
760 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
761 | WARN_ON(info->control.rates[i].idx > 76); | |
762 | continue; | |
763 | } | |
e2ebc74d | 764 | |
e6a9854b JB |
765 | /* set up RTS protection if desired */ |
766 | if (rts) | |
767 | info->control.rates[i].flags |= | |
768 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 769 | |
e6a9854b | 770 | /* RC is busted */ |
075cbc9e S |
771 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
772 | sband->n_bitrates)) { | |
e6a9854b JB |
773 | info->control.rates[i].idx = -1; |
774 | continue; | |
8318d78a | 775 | } |
e2ebc74d | 776 | |
e6a9854b JB |
777 | rate = &sband->bitrates[info->control.rates[i].idx]; |
778 | ||
779 | /* set up short preamble */ | |
780 | if (short_preamble && | |
781 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
782 | info->control.rates[i].flags |= | |
783 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
784 | ||
785 | /* set up G protection */ | |
786 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
787 | rate->flags & IEEE80211_RATE_ERP_G) | |
788 | info->control.rates[i].flags |= | |
789 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
790 | } |
791 | ||
e6a9854b JB |
792 | return TX_CONTINUE; |
793 | } | |
794 | ||
f591fa5d JB |
795 | static ieee80211_tx_result debug_noinline |
796 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
797 | { | |
798 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
799 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
800 | u16 *seq; | |
801 | u8 *qc; | |
802 | int tid; | |
803 | ||
25d834e1 JB |
804 | /* |
805 | * Packet injection may want to control the sequence | |
806 | * number, if we have no matching interface then we | |
807 | * neither assign one ourselves nor ask the driver to. | |
808 | */ | |
5061b0c2 | 809 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
810 | return TX_CONTINUE; |
811 | ||
f591fa5d JB |
812 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
813 | return TX_CONTINUE; | |
814 | ||
815 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
816 | return TX_CONTINUE; | |
817 | ||
49a59543 JB |
818 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
819 | return TX_CONTINUE; | |
820 | ||
94778280 JB |
821 | /* |
822 | * Anything but QoS data that has a sequence number field | |
823 | * (is long enough) gets a sequence number from the global | |
824 | * counter. | |
825 | */ | |
f591fa5d | 826 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 827 | /* driver should assign sequence number */ |
f591fa5d | 828 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
829 | /* for pure STA mode without beacons, we can do it */ |
830 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
831 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
832 | return TX_CONTINUE; |
833 | } | |
834 | ||
835 | /* | |
836 | * This should be true for injected/management frames only, for | |
837 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
838 | * above since they are not QoS-data frames. | |
839 | */ | |
840 | if (!tx->sta) | |
841 | return TX_CONTINUE; | |
842 | ||
843 | /* include per-STA, per-TID sequence counter */ | |
844 | ||
845 | qc = ieee80211_get_qos_ctl(hdr); | |
846 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
847 | seq = &tx->sta->tid_seq[tid]; | |
848 | ||
849 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
850 | ||
851 | /* Increase the sequence number. */ | |
852 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
853 | ||
854 | return TX_CONTINUE; | |
855 | } | |
856 | ||
252b86c4 | 857 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
858 | struct sk_buff *skb, int hdrlen, |
859 | int frag_threshold) | |
860 | { | |
252b86c4 | 861 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 862 | struct ieee80211_tx_info *info; |
252b86c4 | 863 | struct sk_buff *tmp; |
2de8e0d9 JB |
864 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
865 | int pos = hdrlen + per_fragm; | |
866 | int rem = skb->len - hdrlen - per_fragm; | |
867 | ||
868 | if (WARN_ON(rem < 0)) | |
869 | return -EINVAL; | |
870 | ||
252b86c4 JB |
871 | /* first fragment was already added to queue by caller */ |
872 | ||
2de8e0d9 JB |
873 | while (rem) { |
874 | int fraglen = per_fragm; | |
875 | ||
876 | if (fraglen > rem) | |
877 | fraglen = rem; | |
878 | rem -= fraglen; | |
879 | tmp = dev_alloc_skb(local->tx_headroom + | |
880 | frag_threshold + | |
881 | IEEE80211_ENCRYPT_HEADROOM + | |
882 | IEEE80211_ENCRYPT_TAILROOM); | |
883 | if (!tmp) | |
884 | return -ENOMEM; | |
252b86c4 JB |
885 | |
886 | __skb_queue_tail(&tx->skbs, tmp); | |
887 | ||
2de8e0d9 JB |
888 | skb_reserve(tmp, local->tx_headroom + |
889 | IEEE80211_ENCRYPT_HEADROOM); | |
890 | /* copy control information */ | |
891 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
892 | |
893 | info = IEEE80211_SKB_CB(tmp); | |
894 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
895 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
896 | ||
897 | if (rem) | |
898 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
899 | ||
2de8e0d9 JB |
900 | skb_copy_queue_mapping(tmp, skb); |
901 | tmp->priority = skb->priority; | |
2de8e0d9 | 902 | tmp->dev = skb->dev; |
2de8e0d9 JB |
903 | |
904 | /* copy header and data */ | |
905 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
906 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
907 | ||
908 | pos += fraglen; | |
909 | } | |
910 | ||
252b86c4 | 911 | /* adjust first fragment's length */ |
2de8e0d9 JB |
912 | skb->len = hdrlen + per_fragm; |
913 | return 0; | |
914 | } | |
915 | ||
d9e8a70f | 916 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
917 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
918 | { | |
2de8e0d9 JB |
919 | struct sk_buff *skb = tx->skb; |
920 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
921 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 922 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
923 | int hdrlen; |
924 | int fragnum; | |
e2454948 | 925 | |
252b86c4 JB |
926 | /* no matter what happens, tx->skb moves to tx->skbs */ |
927 | __skb_queue_tail(&tx->skbs, skb); | |
928 | tx->skb = NULL; | |
929 | ||
a26eb27a JB |
930 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
931 | return TX_CONTINUE; | |
932 | ||
933 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
934 | return TX_CONTINUE; |
935 | ||
eefce91a JB |
936 | /* |
937 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 938 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 939 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 940 | */ |
8b30b1fe | 941 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
942 | return TX_DROP; |
943 | ||
065e9605 | 944 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 945 | |
a26eb27a | 946 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 947 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 948 | return TX_DROP; |
e6a9854b | 949 | |
2de8e0d9 JB |
950 | /* |
951 | * Now fragment the frame. This will allocate all the fragments and | |
952 | * chain them (using skb as the first fragment) to skb->next. | |
953 | * During transmission, we will remove the successfully transmitted | |
954 | * fragments from this list. When the low-level driver rejects one | |
955 | * of the fragments then we will simply pretend to accept the skb | |
956 | * but store it away as pending. | |
957 | */ | |
252b86c4 | 958 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 959 | return TX_DROP; |
e6a9854b | 960 | |
2de8e0d9 JB |
961 | /* update duration/seq/flags of fragments */ |
962 | fragnum = 0; | |
252b86c4 JB |
963 | |
964 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 965 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 966 | |
2de8e0d9 JB |
967 | hdr = (void *)skb->data; |
968 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 969 | |
252b86c4 | 970 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 971 | hdr->frame_control |= morefrags; |
e6a9854b JB |
972 | /* |
973 | * No multi-rate retries for fragmented frames, that | |
974 | * would completely throw off the NAV at other STAs. | |
975 | */ | |
976 | info->control.rates[1].idx = -1; | |
977 | info->control.rates[2].idx = -1; | |
978 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 979 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 980 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
981 | } else { |
982 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 983 | } |
2de8e0d9 JB |
984 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
985 | fragnum++; | |
252b86c4 | 986 | } |
e2ebc74d | 987 | |
9ae54c84 | 988 | return TX_CONTINUE; |
e2ebc74d JB |
989 | } |
990 | ||
feff1f2f JB |
991 | static ieee80211_tx_result debug_noinline |
992 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
993 | { | |
252b86c4 | 994 | struct sk_buff *skb; |
560d2682 | 995 | int ac = -1; |
feff1f2f JB |
996 | |
997 | if (!tx->sta) | |
998 | return TX_CONTINUE; | |
999 | ||
252b86c4 | 1000 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 1001 | ac = skb_get_queue_mapping(skb); |
feff1f2f | 1002 | tx->sta->tx_fragments++; |
560d2682 | 1003 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 1004 | } |
560d2682 JB |
1005 | if (ac >= 0) |
1006 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
1007 | |
1008 | return TX_CONTINUE; | |
1009 | } | |
1010 | ||
d9e8a70f | 1011 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1012 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1013 | { | |
1014 | if (!tx->key) | |
1015 | return TX_CONTINUE; | |
1016 | ||
97359d12 JB |
1017 | switch (tx->key->conf.cipher) { |
1018 | case WLAN_CIPHER_SUITE_WEP40: | |
1019 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1020 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1021 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1022 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1023 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 1024 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 1025 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1026 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 1027 | default: |
d32a1028 | 1028 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1029 | } |
1030 | ||
e2454948 JB |
1031 | return TX_DROP; |
1032 | } | |
1033 | ||
d9e8a70f | 1034 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1035 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1036 | { | |
252b86c4 | 1037 | struct sk_buff *skb; |
2de8e0d9 JB |
1038 | struct ieee80211_hdr *hdr; |
1039 | int next_len; | |
1040 | bool group_addr; | |
03f93c3d | 1041 | |
252b86c4 | 1042 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1043 | hdr = (void *) skb->data; |
7e0aae47 JM |
1044 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1045 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1046 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1047 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1048 | next_len = next->len; | |
1049 | } else | |
1050 | next_len = 0; | |
2de8e0d9 | 1051 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1052 | |
2de8e0d9 | 1053 | hdr->duration_id = |
252b86c4 JB |
1054 | ieee80211_duration(tx, skb, group_addr, next_len); |
1055 | } | |
03f93c3d JB |
1056 | |
1057 | return TX_CONTINUE; | |
1058 | } | |
1059 | ||
e2ebc74d JB |
1060 | /* actual transmit path */ |
1061 | ||
a622ab72 JB |
1062 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1063 | struct sk_buff *skb, | |
1064 | struct ieee80211_tx_info *info, | |
1065 | struct tid_ampdu_tx *tid_tx, | |
1066 | int tid) | |
1067 | { | |
1068 | bool queued = false; | |
285fa695 | 1069 | bool reset_agg_timer = false; |
aa454580 | 1070 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1071 | |
1072 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1073 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1074 | reset_agg_timer = true; |
0ab33703 JB |
1075 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1076 | /* | |
1077 | * nothing -- this aggregation session is being started | |
1078 | * but that might still fail with the driver | |
1079 | */ | |
a622ab72 JB |
1080 | } else { |
1081 | spin_lock(&tx->sta->lock); | |
1082 | /* | |
1083 | * Need to re-check now, because we may get here | |
1084 | * | |
1085 | * 1) in the window during which the setup is actually | |
1086 | * already done, but not marked yet because not all | |
1087 | * packets are spliced over to the driver pending | |
1088 | * queue yet -- if this happened we acquire the lock | |
1089 | * either before or after the splice happens, but | |
1090 | * need to recheck which of these cases happened. | |
1091 | * | |
1092 | * 2) during session teardown, if the OPERATIONAL bit | |
1093 | * was cleared due to the teardown but the pointer | |
1094 | * hasn't been assigned NULL yet (or we loaded it | |
1095 | * before it was assigned) -- in this case it may | |
1096 | * now be NULL which means we should just let the | |
1097 | * packet pass through because splicing the frames | |
1098 | * back is already done. | |
1099 | */ | |
40b275b6 | 1100 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1101 | |
1102 | if (!tid_tx) { | |
1103 | /* do nothing, let packet pass through */ | |
1104 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1105 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1106 | reset_agg_timer = true; |
a622ab72 JB |
1107 | } else { |
1108 | queued = true; | |
1109 | info->control.vif = &tx->sdata->vif; | |
1110 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1111 | __skb_queue_tail(&tid_tx->pending, skb); | |
aa454580 HS |
1112 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1113 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1114 | } |
1115 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1116 | |
1117 | if (purge_skb) | |
c3e7724b | 1118 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1119 | } |
1120 | ||
285fa695 NM |
1121 | /* reset session timer */ |
1122 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1123 | tid_tx->last_tx = jiffies; |
285fa695 | 1124 | |
a622ab72 JB |
1125 | return queued; |
1126 | } | |
1127 | ||
58d4185e JB |
1128 | /* |
1129 | * initialises @tx | |
1130 | */ | |
9ae54c84 | 1131 | static ieee80211_tx_result |
3b8d81e0 JB |
1132 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1133 | struct ieee80211_tx_data *tx, | |
1134 | struct sk_buff *skb) | |
e2ebc74d | 1135 | { |
3b8d81e0 | 1136 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1137 | struct ieee80211_hdr *hdr; |
e039fa4a | 1138 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1139 | int tid; |
a622ab72 | 1140 | u8 *qc; |
e2ebc74d JB |
1141 | |
1142 | memset(tx, 0, sizeof(*tx)); | |
1143 | tx->skb = skb; | |
e2ebc74d | 1144 | tx->local = local; |
3b8d81e0 | 1145 | tx->sdata = sdata; |
252b86c4 | 1146 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1147 | |
cd8ffc80 JB |
1148 | /* |
1149 | * If this flag is set to true anywhere, and we get here, | |
1150 | * we are doing the needed processing, so remove the flag | |
1151 | * now. | |
1152 | */ | |
1153 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1154 | ||
58d4185e JB |
1155 | hdr = (struct ieee80211_hdr *) skb->data; |
1156 | ||
3f0e0b22 | 1157 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1158 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1159 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1160 | return TX_DROP; | |
66f2c99a FF |
1161 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED || |
1162 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
b4d57adb | 1163 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1164 | } |
f14543ee | 1165 | if (!tx->sta) |
abe60632 | 1166 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1167 | |
cd8ffc80 | 1168 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1169 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1170 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1171 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1172 | struct tid_ampdu_tx *tid_tx; |
1173 | ||
8b30b1fe S |
1174 | qc = ieee80211_get_qos_ctl(hdr); |
1175 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1176 | ||
a622ab72 JB |
1177 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1178 | if (tid_tx) { | |
1179 | bool queued; | |
cd8ffc80 | 1180 | |
a622ab72 JB |
1181 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1182 | tid_tx, tid); | |
1183 | ||
1184 | if (unlikely(queued)) | |
1185 | return TX_QUEUED; | |
1186 | } | |
8b30b1fe S |
1187 | } |
1188 | ||
badffb72 | 1189 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1190 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1191 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1192 | } else |
5cf121c3 | 1193 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1194 | |
a26eb27a JB |
1195 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1196 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1197 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1198 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1199 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1200 | } |
1201 | ||
e2ebc74d | 1202 | if (!tx->sta) |
e039fa4a | 1203 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1204 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1205 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1206 | |
e039fa4a | 1207 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1208 | |
9ae54c84 | 1209 | return TX_CONTINUE; |
e2ebc74d JB |
1210 | } |
1211 | ||
11127e91 JB |
1212 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1213 | struct ieee80211_vif *vif, | |
1214 | struct ieee80211_sta *sta, | |
1215 | struct sk_buff_head *skbs, | |
1216 | bool txpending) | |
e2ebc74d | 1217 | { |
36323f81 | 1218 | struct ieee80211_tx_control control; |
252b86c4 | 1219 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1220 | unsigned long flags; |
e2ebc74d | 1221 | |
252b86c4 | 1222 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1223 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1224 | int q = info->hw_queue; | |
1225 | ||
1226 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1227 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1228 | __skb_unlink(skb, skbs); | |
c3e7724b | 1229 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1230 | continue; |
1231 | } | |
1232 | #endif | |
3b8d81e0 JB |
1233 | |
1234 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1235 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1236 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1237 | if (unlikely(info->flags & |
a7679ed5 SF |
1238 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1239 | if (local->queue_stop_reasons[q] & | |
1240 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1241 | /* | |
1242 | * Drop off-channel frames if queues | |
1243 | * are stopped for any reason other | |
1244 | * than off-channel operation. Never | |
1245 | * queue them. | |
1246 | */ | |
1247 | spin_unlock_irqrestore( | |
1248 | &local->queue_stop_reason_lock, | |
1249 | flags); | |
1250 | ieee80211_purge_tx_queue(&local->hw, | |
1251 | skbs); | |
1252 | return true; | |
1253 | } | |
1254 | } else { | |
1255 | ||
6c17b77b | 1256 | /* |
a7679ed5 SF |
1257 | * Since queue is stopped, queue up frames for |
1258 | * later transmission from the tx-pending | |
1259 | * tasklet when the queue is woken again. | |
6c17b77b | 1260 | */ |
a7679ed5 SF |
1261 | if (txpending) |
1262 | skb_queue_splice_init(skbs, | |
1263 | &local->pending[q]); | |
1264 | else | |
1265 | skb_queue_splice_tail_init(skbs, | |
1266 | &local->pending[q]); | |
1267 | ||
1268 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1269 | flags); | |
1270 | return false; | |
6c17b77b | 1271 | } |
7bb45683 | 1272 | } |
3b8d81e0 | 1273 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1274 | |
11127e91 | 1275 | info->control.vif = vif; |
36323f81 | 1276 | control.sta = sta; |
f0e72851 | 1277 | |
11127e91 | 1278 | __skb_unlink(skb, skbs); |
36323f81 | 1279 | drv_tx(local, &control, skb); |
11127e91 | 1280 | } |
5061b0c2 | 1281 | |
11127e91 JB |
1282 | return true; |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1287 | */ | |
1288 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1289 | struct sk_buff_head *skbs, int led_len, | |
1290 | struct sta_info *sta, bool txpending) | |
1291 | { | |
1292 | struct ieee80211_tx_info *info; | |
1293 | struct ieee80211_sub_if_data *sdata; | |
1294 | struct ieee80211_vif *vif; | |
1295 | struct ieee80211_sta *pubsta; | |
1296 | struct sk_buff *skb; | |
1297 | bool result = true; | |
1298 | __le16 fc; | |
5061b0c2 | 1299 | |
11127e91 JB |
1300 | if (WARN_ON(skb_queue_empty(skbs))) |
1301 | return true; | |
ec25acc4 | 1302 | |
11127e91 JB |
1303 | skb = skb_peek(skbs); |
1304 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1305 | info = IEEE80211_SKB_CB(skb); | |
1306 | sdata = vif_to_sdata(info->control.vif); | |
1307 | if (sta && !sta->uploaded) | |
1308 | sta = NULL; | |
1309 | ||
1310 | if (sta) | |
1311 | pubsta = &sta->sta; | |
1312 | else | |
1313 | pubsta = NULL; | |
1314 | ||
1315 | switch (sdata->vif.type) { | |
1316 | case NL80211_IFTYPE_MONITOR: | |
4b6f1dd6 | 1317 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1318 | if (sdata) { |
4b6f1dd6 | 1319 | vif = &sdata->vif; |
3a25a8c8 JB |
1320 | info->hw_queue = |
1321 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1322 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1323 | dev_kfree_skb(skb); | |
1324 | return true; | |
1325 | } else | |
4b6f1dd6 | 1326 | vif = NULL; |
11127e91 JB |
1327 | break; |
1328 | case NL80211_IFTYPE_AP_VLAN: | |
1329 | sdata = container_of(sdata->bss, | |
1330 | struct ieee80211_sub_if_data, u.ap); | |
1331 | /* fall through */ | |
1332 | default: | |
1333 | vif = &sdata->vif; | |
1334 | break; | |
e2ebc74d | 1335 | } |
2de8e0d9 | 1336 | |
cb831b53 JB |
1337 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1338 | txpending); | |
11127e91 | 1339 | |
74e4dbfd JB |
1340 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
1341 | ieee80211_led_tx(local, 1); | |
1342 | ||
4db4e0a1 | 1343 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1344 | |
11127e91 | 1345 | return result; |
e2ebc74d JB |
1346 | } |
1347 | ||
97b045d6 JB |
1348 | /* |
1349 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1350 | * frame was dropped or queued. | |
1351 | */ | |
1352 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1353 | { | |
252b86c4 | 1354 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1355 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1356 | |
9aa4aee3 JB |
1357 | #define CALL_TXH(txh) \ |
1358 | do { \ | |
1359 | res = txh(tx); \ | |
1360 | if (res != TX_CONTINUE) \ | |
1361 | goto txh_done; \ | |
1362 | } while (0) | |
1363 | ||
5c1b98a5 | 1364 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1365 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1366 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1367 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1368 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1369 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1370 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1371 | |
aa5b5492 JB |
1372 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1373 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1374 | tx->skb = NULL; | |
c6fcf6bc | 1375 | goto txh_done; |
aa5b5492 | 1376 | } |
c6fcf6bc JB |
1377 | |
1378 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1379 | CALL_TXH(ieee80211_tx_h_sequence); |
1380 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1381 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1382 | CALL_TXH(ieee80211_tx_h_stats); |
1383 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1384 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1385 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1386 | #undef CALL_TXH |
97b045d6 | 1387 | |
d9e8a70f | 1388 | txh_done: |
97b045d6 | 1389 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1390 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1391 | if (tx->skb) |
c3e7724b | 1392 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1393 | else |
1f98ab7f | 1394 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1395 | return -1; |
1396 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1397 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1398 | return -1; |
1399 | } | |
1400 | ||
1401 | return 0; | |
1402 | } | |
1403 | ||
7bb45683 JB |
1404 | /* |
1405 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1406 | */ | |
1407 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
55de908a JB |
1408 | struct sk_buff *skb, bool txpending, |
1409 | enum ieee80211_band band) | |
e2ebc74d | 1410 | { |
3b8d81e0 | 1411 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1412 | struct ieee80211_tx_data tx; |
97b045d6 | 1413 | ieee80211_tx_result res_prepare; |
e039fa4a | 1414 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1415 | bool result = true; |
74e4dbfd | 1416 | int led_len; |
e2ebc74d | 1417 | |
e2ebc74d JB |
1418 | if (unlikely(skb->len < 10)) { |
1419 | dev_kfree_skb(skb); | |
7bb45683 | 1420 | return true; |
e2ebc74d JB |
1421 | } |
1422 | ||
58d4185e | 1423 | /* initialises tx */ |
74e4dbfd | 1424 | led_len = skb->len; |
3b8d81e0 | 1425 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1426 | |
cd8ffc80 | 1427 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1428 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1429 | return true; |
cd8ffc80 | 1430 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1431 | return true; |
e2ebc74d JB |
1432 | } |
1433 | ||
55de908a | 1434 | info->band = band; |
e2ebc74d | 1435 | |
3a25a8c8 JB |
1436 | /* set up hw_queue value early */ |
1437 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1438 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1439 | info->hw_queue = | |
1440 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1441 | ||
7bb45683 | 1442 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1443 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1444 | tx.sta, txpending); | |
55de908a | 1445 | |
7bb45683 | 1446 | return result; |
e2ebc74d JB |
1447 | } |
1448 | ||
1449 | /* device xmit handlers */ | |
1450 | ||
3bff1865 | 1451 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1452 | struct sk_buff *skb, |
1453 | int head_need, bool may_encrypt) | |
1454 | { | |
3bff1865 | 1455 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1456 | int tail_need = 0; |
1457 | ||
3bff1865 | 1458 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1459 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1460 | tail_need -= skb_tailroom(skb); | |
1461 | tail_need = max_t(int, tail_need, 0); | |
1462 | } | |
1463 | ||
fc7c976d | 1464 | if (skb_cloned(skb)) |
23c0752a | 1465 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1466 | else if (head_need || tail_need) |
23c0752a | 1467 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1468 | else |
1469 | return 0; | |
23c0752a JB |
1470 | |
1471 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1472 | wiphy_debug(local->hw.wiphy, |
1473 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1474 | return -ENOMEM; |
1475 | } | |
1476 | ||
23c0752a JB |
1477 | return 0; |
1478 | } | |
1479 | ||
55de908a JB |
1480 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
1481 | enum ieee80211_band band) | |
e2ebc74d | 1482 | { |
3b8d81e0 | 1483 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1484 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1485 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1486 | int headroom; |
23c0752a | 1487 | bool may_encrypt; |
e2ebc74d | 1488 | |
3b8d81e0 | 1489 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1490 | |
3b8d81e0 | 1491 | headroom = local->tx_headroom; |
23c0752a JB |
1492 | if (may_encrypt) |
1493 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1494 | headroom -= skb_headroom(skb); | |
1495 | headroom = max_t(int, 0, headroom); | |
1496 | ||
3bff1865 | 1497 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1498 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1499 | return; |
e2ebc74d JB |
1500 | } |
1501 | ||
740c1aa3 | 1502 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1503 | info->control.vif = &sdata->vif; |
e2ebc74d | 1504 | |
3f52b7e3 MP |
1505 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1506 | if (ieee80211_is_data(hdr->frame_control) && | |
1507 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1508 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1509 | return; /* skb queued: don't free */ |
1510 | } else { | |
1511 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1512 | } | |
98aed9fd | 1513 | } |
cca89496 | 1514 | |
2154c81c | 1515 | ieee80211_set_qos_hdr(sdata, skb); |
55de908a | 1516 | ieee80211_tx(sdata, skb, false, band); |
e2ebc74d JB |
1517 | } |
1518 | ||
73b9f03a JB |
1519 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1520 | { | |
1521 | struct ieee80211_radiotap_iterator iterator; | |
1522 | struct ieee80211_radiotap_header *rthdr = | |
1523 | (struct ieee80211_radiotap_header *) skb->data; | |
1524 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1525 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1526 | NULL); | |
1527 | u16 txflags; | |
1528 | ||
1529 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1530 | IEEE80211_TX_CTL_DONTFRAG; | |
1531 | ||
1532 | /* | |
1533 | * for every radiotap entry that is present | |
1534 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1535 | * entries present, or -EINVAL on error) | |
1536 | */ | |
1537 | ||
1538 | while (!ret) { | |
1539 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1540 | ||
1541 | if (ret) | |
1542 | continue; | |
1543 | ||
1544 | /* see if this argument is something we can use */ | |
1545 | switch (iterator.this_arg_index) { | |
1546 | /* | |
1547 | * You must take care when dereferencing iterator.this_arg | |
1548 | * for multibyte types... the pointer is not aligned. Use | |
1549 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1550 | * iterator.this_arg for type "type" safely on all arches. | |
1551 | */ | |
1552 | case IEEE80211_RADIOTAP_FLAGS: | |
1553 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1554 | /* | |
1555 | * this indicates that the skb we have been | |
1556 | * handed has the 32-bit FCS CRC at the end... | |
1557 | * we should react to that by snipping it off | |
1558 | * because it will be recomputed and added | |
1559 | * on transmission | |
1560 | */ | |
1561 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1562 | return false; | |
1563 | ||
1564 | skb_trim(skb, skb->len - FCS_LEN); | |
1565 | } | |
1566 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1567 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1568 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1569 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1570 | break; | |
1571 | ||
1572 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1573 | txflags = get_unaligned_le16(iterator.this_arg); | |
1574 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1575 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1576 | break; | |
1577 | ||
1578 | /* | |
1579 | * Please update the file | |
1580 | * Documentation/networking/mac80211-injection.txt | |
1581 | * when parsing new fields here. | |
1582 | */ | |
1583 | ||
1584 | default: | |
1585 | break; | |
1586 | } | |
1587 | } | |
1588 | ||
1589 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1590 | return false; | |
1591 | ||
1592 | /* | |
1593 | * remove the radiotap header | |
1594 | * iterator->_max_length was sanity-checked against | |
1595 | * skb->len by iterator init | |
1596 | */ | |
1597 | skb_pull(skb, iterator._max_length); | |
1598 | ||
1599 | return true; | |
1600 | } | |
1601 | ||
d0cf9c0d SH |
1602 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1603 | struct net_device *dev) | |
e2ebc74d JB |
1604 | { |
1605 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a JB |
1606 | struct ieee80211_chanctx_conf *chanctx_conf; |
1607 | struct ieee80211_channel *chan; | |
e2ebc74d JB |
1608 | struct ieee80211_radiotap_header *prthdr = |
1609 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1610 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1611 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1612 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
9b8a74e3 | 1613 | u16 len_rthdr; |
5d9cf4a5 | 1614 | int hdrlen; |
e2ebc74d | 1615 | |
9b8a74e3 AG |
1616 | /* check for not even having the fixed radiotap header part */ |
1617 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1618 | goto fail; /* too short to be possibly valid */ | |
1619 | ||
1620 | /* is it a header version we can trust to find length from? */ | |
1621 | if (unlikely(prthdr->it_version)) | |
1622 | goto fail; /* only version 0 is supported */ | |
1623 | ||
1624 | /* then there must be a radiotap header with a length we can use */ | |
1625 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1626 | ||
1627 | /* does the skb contain enough to deliver on the alleged length? */ | |
1628 | if (unlikely(skb->len < len_rthdr)) | |
1629 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1630 | |
e2ebc74d JB |
1631 | /* |
1632 | * fix up the pointers accounting for the radiotap | |
1633 | * header still being in there. We are being given | |
1634 | * a precooked IEEE80211 header so no need for | |
1635 | * normal processing | |
1636 | */ | |
9b8a74e3 | 1637 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1638 | /* |
9b8a74e3 AG |
1639 | * these are just fixed to the end of the rt area since we |
1640 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1641 | */ |
9b8a74e3 AG |
1642 | skb_set_network_header(skb, len_rthdr); |
1643 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1644 | |
5d9cf4a5 JB |
1645 | if (skb->len < len_rthdr + 2) |
1646 | goto fail; | |
1647 | ||
1648 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1649 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1650 | ||
1651 | if (skb->len < len_rthdr + hdrlen) | |
1652 | goto fail; | |
1653 | ||
f75f5c6f HS |
1654 | /* |
1655 | * Initialize skb->protocol if the injected frame is a data frame | |
1656 | * carrying a rfc1042 header | |
1657 | */ | |
5d9cf4a5 JB |
1658 | if (ieee80211_is_data(hdr->frame_control) && |
1659 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1660 | u8 *payload = (u8 *)hdr + hdrlen; | |
1661 | ||
b203ca39 | 1662 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1663 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1664 | payload[7]); | |
f75f5c6f HS |
1665 | } |
1666 | ||
3b8d81e0 JB |
1667 | memset(info, 0, sizeof(*info)); |
1668 | ||
5d9cf4a5 | 1669 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1670 | IEEE80211_TX_CTL_INJECTED; |
1671 | ||
1672 | /* process and remove the injection radiotap header */ | |
1673 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1674 | goto fail; | |
5d9cf4a5 JB |
1675 | |
1676 | rcu_read_lock(); | |
1677 | ||
1678 | /* | |
1679 | * We process outgoing injected frames that have a local address | |
1680 | * we handle as though they are non-injected frames. | |
1681 | * This code here isn't entirely correct, the local MAC address | |
1682 | * isn't always enough to find the interface to use; for proper | |
1683 | * VLAN/WDS support we will need a different mechanism (which | |
1684 | * likely isn't going to be monitor interfaces). | |
1685 | */ | |
1686 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1687 | ||
1688 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1689 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1690 | continue; | |
1691 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1692 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1693 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1694 | continue; | |
b203ca39 | 1695 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1696 | sdata = tmp_sdata; |
1697 | break; | |
1698 | } | |
1699 | } | |
7351c6bd | 1700 | |
55de908a JB |
1701 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1702 | if (!chanctx_conf) { | |
1703 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1704 | if (tmp_sdata) | |
1705 | chanctx_conf = | |
1706 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1707 | } | |
55de908a | 1708 | |
b4a7ff75 FF |
1709 | if (chanctx_conf) |
1710 | chan = chanctx_conf->def.chan; | |
1711 | else if (!local->use_chanctx) | |
1712 | chan = local->_oper_channel; | |
1713 | else | |
1714 | goto fail_rcu; | |
55de908a JB |
1715 | |
1716 | /* | |
1717 | * Frame injection is not allowed if beaconing is not allowed | |
1718 | * or if we need radar detection. Beaconing is usually not allowed when | |
1719 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1720 | * Passive scan is also used in world regulatory domains where | |
1721 | * your country is not known and as such it should be treated as | |
1722 | * NO TX unless the channel is explicitly allowed in which case | |
1723 | * your current regulatory domain would not have the passive scan | |
1724 | * flag. | |
1725 | * | |
1726 | * Since AP mode uses monitor interfaces to inject/TX management | |
1727 | * frames we can make AP mode the exception to this rule once it | |
1728 | * supports radar detection as its implementation can deal with | |
1729 | * radar detection by itself. We can do that later by adding a | |
1730 | * monitor flag interfaces used for AP support. | |
1731 | */ | |
1732 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1733 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1734 | goto fail_rcu; | |
1735 | ||
1736 | ieee80211_xmit(sdata, skb, chan->band); | |
5d9cf4a5 JB |
1737 | rcu_read_unlock(); |
1738 | ||
e2ebc74d | 1739 | return NETDEV_TX_OK; |
9b8a74e3 | 1740 | |
55de908a JB |
1741 | fail_rcu: |
1742 | rcu_read_unlock(); | |
9b8a74e3 AG |
1743 | fail: |
1744 | dev_kfree_skb(skb); | |
1745 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1746 | } |
1747 | ||
1748 | /** | |
1749 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1750 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1751 | * @skb: packet to be sent | |
1752 | * @dev: incoming interface | |
1753 | * | |
1754 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1755 | * not be freed, and caller is responsible for either retrying later or freeing | |
1756 | * skb). | |
1757 | * | |
1758 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1759 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1760 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1761 | * transmission (through low-level driver). | |
1762 | */ | |
d0cf9c0d SH |
1763 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1764 | struct net_device *dev) | |
e2ebc74d | 1765 | { |
133b8226 JB |
1766 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1767 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1768 | struct ieee80211_tx_info *info; |
dcf33963 | 1769 | int head_need; |
065e9605 HH |
1770 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1771 | __le16 fc; | |
e2ebc74d | 1772 | struct ieee80211_hdr hdr; |
ff67bb86 | 1773 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1774 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1775 | const u8 *encaps_data; |
1776 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1777 | int nh_pos, h_pos; |
f14543ee | 1778 | struct sta_info *sta = NULL; |
c2c98fde | 1779 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1780 | bool tdls_direct = false; |
a729cff8 JB |
1781 | bool multicast; |
1782 | u32 info_flags = 0; | |
1783 | u16 info_id = 0; | |
55de908a JB |
1784 | struct ieee80211_chanctx_conf *chanctx_conf; |
1785 | struct ieee80211_sub_if_data *ap_sdata; | |
1786 | enum ieee80211_band band; | |
e2ebc74d | 1787 | |
dcf33963 | 1788 | if (unlikely(skb->len < ETH_HLEN)) |
e2ebc74d | 1789 | goto fail; |
e2ebc74d | 1790 | |
e2ebc74d JB |
1791 | /* convert Ethernet header to proper 802.11 header (based on |
1792 | * operation mode) */ | |
1793 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1794 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1795 | |
55de908a JB |
1796 | rcu_read_lock(); |
1797 | ||
51fb61e7 | 1798 | switch (sdata->vif.type) { |
05c914fe | 1799 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1800 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1801 | if (sta) { |
1802 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1803 | /* RA TA DA SA */ | |
1804 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1805 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1806 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1807 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1808 | hdrlen = 30; | |
c2c98fde JB |
1809 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1810 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee | 1811 | } |
55de908a JB |
1812 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1813 | u.ap); | |
1814 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
1815 | if (!chanctx_conf) | |
1816 | goto fail_rcu; | |
4bf88530 | 1817 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1818 | if (sta) |
1819 | break; | |
1820 | /* fall through */ | |
1821 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1822 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1823 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1824 | if (!chanctx_conf) | |
1825 | goto fail_rcu; | |
065e9605 | 1826 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1827 | /* DA BSSID SA */ |
1828 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1829 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1830 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1831 | hdrlen = 24; | |
4bf88530 | 1832 | band = chanctx_conf->def.chan->band; |
cf966838 | 1833 | break; |
05c914fe | 1834 | case NL80211_IFTYPE_WDS: |
065e9605 | 1835 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1836 | /* RA TA DA SA */ |
1837 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1838 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1839 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1840 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1841 | hdrlen = 30; | |
55de908a JB |
1842 | /* |
1843 | * This is the exception! WDS style interfaces are prohibited | |
1844 | * when channel contexts are in used so this must be valid | |
1845 | */ | |
1846 | band = local->hw.conf.channel->band; | |
cf966838 | 1847 | break; |
33b64eb2 | 1848 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1849 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1850 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1851 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1852 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
55de908a | 1853 | goto fail_rcu; |
33b64eb2 | 1854 | } |
55de908a | 1855 | |
b8bacc18 | 1856 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1857 | struct sta_info *next_hop; |
1858 | bool mpp_lookup = true; | |
1859 | ||
bf7cd94d | 1860 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1861 | if (mpath) { |
1862 | mpp_lookup = false; | |
1863 | next_hop = rcu_dereference(mpath->next_hop); | |
1864 | if (!next_hop || | |
1865 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1866 | MESH_PATH_RESOLVING))) | |
1867 | mpp_lookup = true; | |
1868 | } | |
1869 | ||
1870 | if (mpp_lookup) | |
bf7cd94d | 1871 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1872 | |
1873 | if (mppath && mpath) | |
1874 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1875 | } |
79617dee | 1876 | |
f76b57b4 | 1877 | /* |
9d52501b JF |
1878 | * Use address extension if it is a packet from |
1879 | * another interface or if we know the destination | |
1880 | * is being proxied by a portal (i.e. portal address | |
1881 | * differs from proxied address) | |
f76b57b4 | 1882 | */ |
b203ca39 JP |
1883 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1884 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1885 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1886 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1887 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1888 | NULL, NULL); | |
79617dee | 1889 | } else { |
27f01124 TP |
1890 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1891 | * For unicast with unknown forwarding information, | |
1892 | * destination might be in the MBSS or if that fails | |
1893 | * forwarded to another mesh gate. In either case | |
1894 | * resolution will be handled in ieee80211_xmit(), so | |
1895 | * leave the original DA. This also works for mcast */ | |
1896 | const u8 *mesh_da = skb->data; | |
1897 | ||
1898 | if (mppath) | |
1899 | mesh_da = mppath->mpp; | |
1900 | else if (mpath) | |
1901 | mesh_da = mpath->dst; | |
79617dee | 1902 | |
3c5772a5 | 1903 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1904 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1905 | if (is_multicast_ether_addr(mesh_da)) |
1906 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1907 | meshhdrlen = ieee80211_new_mesh_header( |
1908 | sdata, &mesh_hdr, | |
1909 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1910 | else |
27f01124 | 1911 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1912 | meshhdrlen = ieee80211_new_mesh_header( |
1913 | sdata, &mesh_hdr, skb->data, | |
1914 | skb->data + ETH_ALEN); | |
79617dee | 1915 | |
79617dee | 1916 | } |
55de908a JB |
1917 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1918 | if (!chanctx_conf) | |
1919 | goto fail_rcu; | |
4bf88530 | 1920 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1921 | break; |
1922 | #endif | |
05c914fe | 1923 | case NL80211_IFTYPE_STATION: |
941c93cd | 1924 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1925 | bool tdls_peer = false; |
1926 | ||
941c93cd | 1927 | sta = sta_info_get(sdata, skb->data); |
c2c98fde JB |
1928 | if (sta) { |
1929 | authorized = test_sta_flag(sta, | |
1930 | WLAN_STA_AUTHORIZED); | |
1931 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1932 | tdls_peer = test_sta_flag(sta, | |
1933 | WLAN_STA_TDLS_PEER); | |
1934 | tdls_auth = test_sta_flag(sta, | |
1935 | WLAN_STA_TDLS_PEER_AUTH); | |
1936 | } | |
941c93cd AN |
1937 | |
1938 | /* | |
1939 | * If the TDLS link is enabled, send everything | |
1940 | * directly. Otherwise, allow TDLS setup frames | |
1941 | * to be transmitted indirectly. | |
1942 | */ | |
c2c98fde | 1943 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1944 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1945 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1946 | } | |
1947 | ||
1948 | if (tdls_direct) { | |
1949 | /* link during setup - throw out frames to peer */ | |
dcf33963 | 1950 | if (!tdls_auth) |
55de908a | 1951 | goto fail_rcu; |
941c93cd AN |
1952 | |
1953 | /* DA SA BSSID */ | |
1954 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1955 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1956 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1957 | hdrlen = 24; | |
1958 | } else if (sdata->u.mgd.use_4addr && | |
1959 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1960 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1961 | IEEE80211_FCTL_TODS); | |
f14543ee | 1962 | /* RA TA DA SA */ |
941c93cd | 1963 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1964 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1965 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1966 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1967 | hdrlen = 30; | |
1968 | } else { | |
1969 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1970 | /* BSSID SA DA */ | |
941c93cd | 1971 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
1972 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
1973 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1974 | hdrlen = 24; | |
1975 | } | |
55de908a JB |
1976 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1977 | if (!chanctx_conf) | |
1978 | goto fail_rcu; | |
4bf88530 | 1979 | band = chanctx_conf->def.chan->band; |
cf966838 | 1980 | break; |
05c914fe | 1981 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1982 | /* DA SA BSSID */ |
1983 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1984 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1985 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1986 | hdrlen = 24; |
55de908a JB |
1987 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1988 | if (!chanctx_conf) | |
1989 | goto fail_rcu; | |
4bf88530 | 1990 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
1991 | break; |
1992 | default: | |
55de908a | 1993 | goto fail_rcu; |
e2ebc74d JB |
1994 | } |
1995 | ||
7d185b8b JB |
1996 | /* |
1997 | * There's no need to try to look up the destination | |
1998 | * if it is a multicast address (which can only happen | |
1999 | * in AP mode) | |
2000 | */ | |
a729cff8 JB |
2001 | multicast = is_multicast_ether_addr(hdr.addr1); |
2002 | if (!multicast) { | |
abe60632 | 2003 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
2004 | if (sta) { |
2005 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2006 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
2007 | } | |
e2ebc74d JB |
2008 | } |
2009 | ||
4777be41 JC |
2010 | /* For mesh, the use of the QoS header is mandatory */ |
2011 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 2012 | wme_sta = true; |
4777be41 | 2013 | |
3434fbd3 | 2014 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 2015 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 2016 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2017 | hdrlen += 2; |
2018 | } | |
2019 | ||
2020 | /* | |
238814fd JB |
2021 | * Drop unicast frames to unauthorised stations unless they are |
2022 | * EAPOL frames from the local station. | |
ce3edf6d | 2023 | */ |
55182e4a JB |
2024 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
2025 | !is_multicast_ether_addr(hdr.addr1) && !authorized && | |
2026 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || | |
b203ca39 | 2027 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2028 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2029 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 2030 | dev->name, hdr.addr1); |
ce3edf6d JB |
2031 | #endif |
2032 | ||
2033 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2034 | ||
55de908a | 2035 | goto fail_rcu; |
ce3edf6d JB |
2036 | } |
2037 | ||
a729cff8 JB |
2038 | if (unlikely(!multicast && skb->sk && |
2039 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
2040 | struct sk_buff *orig_skb = skb; | |
2041 | ||
2042 | skb = skb_clone(skb, GFP_ATOMIC); | |
2043 | if (skb) { | |
2044 | unsigned long flags; | |
9475af6e | 2045 | int id; |
a729cff8 JB |
2046 | |
2047 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
9475af6e TH |
2048 | id = idr_alloc(&local->ack_status_frames, orig_skb, |
2049 | 1, 0x10000, GFP_ATOMIC); | |
a729cff8 JB |
2050 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2051 | ||
9475af6e | 2052 | if (id >= 0) { |
a729cff8 JB |
2053 | info_id = id; |
2054 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2055 | } else if (skb_shared(skb)) { | |
2056 | kfree_skb(orig_skb); | |
2057 | } else { | |
2058 | kfree_skb(skb); | |
2059 | skb = orig_skb; | |
2060 | } | |
2061 | } else { | |
2062 | /* couldn't clone -- lose tx status ... */ | |
2063 | skb = orig_skb; | |
2064 | } | |
2065 | } | |
2066 | ||
7e244707 HS |
2067 | /* |
2068 | * If the skb is shared we need to obtain our own copy. | |
2069 | */ | |
2070 | if (skb_shared(skb)) { | |
a729cff8 JB |
2071 | struct sk_buff *tmp_skb = skb; |
2072 | ||
2073 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2074 | WARN_ON(info_id); | |
2075 | ||
f8a0a781 | 2076 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2077 | kfree_skb(tmp_skb); |
2078 | ||
dcf33963 | 2079 | if (!skb) |
55de908a | 2080 | goto fail_rcu; |
7e244707 HS |
2081 | } |
2082 | ||
065e9605 | 2083 | hdr.frame_control = fc; |
e2ebc74d JB |
2084 | hdr.duration_id = 0; |
2085 | hdr.seq_ctrl = 0; | |
2086 | ||
2087 | skip_header_bytes = ETH_HLEN; | |
2088 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2089 | encaps_data = bridge_tunnel_header; | |
2090 | encaps_len = sizeof(bridge_tunnel_header); | |
2091 | skip_header_bytes -= 2; | |
2092 | } else if (ethertype >= 0x600) { | |
2093 | encaps_data = rfc1042_header; | |
2094 | encaps_len = sizeof(rfc1042_header); | |
2095 | skip_header_bytes -= 2; | |
2096 | } else { | |
2097 | encaps_data = NULL; | |
2098 | encaps_len = 0; | |
2099 | } | |
2100 | ||
7e244707 HS |
2101 | nh_pos = skb_network_header(skb) - skb->data; |
2102 | h_pos = skb_transport_header(skb) - skb->data; | |
2103 | ||
e2ebc74d JB |
2104 | skb_pull(skb, skip_header_bytes); |
2105 | nh_pos -= skip_header_bytes; | |
2106 | h_pos -= skip_header_bytes; | |
2107 | ||
23c0752a | 2108 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2109 | |
23c0752a JB |
2110 | /* |
2111 | * So we need to modify the skb header and hence need a copy of | |
2112 | * that. The head_need variable above doesn't, so far, include | |
2113 | * the needed header space that we don't need right away. If we | |
2114 | * can, then we don't reallocate right now but only after the | |
2115 | * frame arrives at the master device (if it does...) | |
2116 | * | |
2117 | * If we cannot, however, then we will reallocate to include all | |
2118 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2119 | * make it big enough for everything we may ever need. | |
2120 | */ | |
e2ebc74d | 2121 | |
3a5be7d4 | 2122 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
2123 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
2124 | head_need += local->tx_headroom; | |
2125 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2126 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2127 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2128 | skb = NULL; |
55de908a | 2129 | goto fail_rcu; |
c3e7724b | 2130 | } |
e2ebc74d JB |
2131 | } |
2132 | ||
2133 | if (encaps_data) { | |
2134 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2135 | nh_pos += encaps_len; | |
2136 | h_pos += encaps_len; | |
2137 | } | |
c29b9b9b | 2138 | |
e4ab7eb0 | 2139 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2140 | if (meshhdrlen > 0) { |
2141 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2142 | nh_pos += meshhdrlen; | |
2143 | h_pos += meshhdrlen; | |
2144 | } | |
e4ab7eb0 | 2145 | #endif |
33b64eb2 | 2146 | |
065e9605 | 2147 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2148 | __le16 *qos_control; |
2149 | ||
2150 | qos_control = (__le16*) skb_push(skb, 2); | |
2151 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
2152 | /* | |
2153 | * Maybe we could actually set some fields here, for now just | |
2154 | * initialise to zero to indicate no special operation. | |
2155 | */ | |
2156 | *qos_control = 0; | |
2157 | } else | |
2158 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2159 | ||
e2ebc74d JB |
2160 | nh_pos += hdrlen; |
2161 | h_pos += hdrlen; | |
2162 | ||
68aae116 SH |
2163 | dev->stats.tx_packets++; |
2164 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2165 | |
2166 | /* Update skb pointers to various headers since this modified frame | |
2167 | * is going to go through Linux networking code that may potentially | |
2168 | * need things like pointer to IP header. */ | |
2169 | skb_set_mac_header(skb, 0); | |
2170 | skb_set_network_header(skb, nh_pos); | |
2171 | skb_set_transport_header(skb, h_pos); | |
2172 | ||
489ee919 | 2173 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2174 | memset(info, 0, sizeof(*info)); |
2175 | ||
e2ebc74d | 2176 | dev->trans_start = jiffies; |
a729cff8 JB |
2177 | |
2178 | info->flags = info_flags; | |
2179 | info->ack_frame_id = info_id; | |
2180 | ||
55de908a JB |
2181 | ieee80211_xmit(sdata, skb, band); |
2182 | rcu_read_unlock(); | |
e2ebc74d | 2183 | |
ec634fe3 | 2184 | return NETDEV_TX_OK; |
e2ebc74d | 2185 | |
55de908a JB |
2186 | fail_rcu: |
2187 | rcu_read_unlock(); | |
e2ebc74d | 2188 | fail: |
dcf33963 JB |
2189 | dev_kfree_skb(skb); |
2190 | return NETDEV_TX_OK; | |
e2ebc74d JB |
2191 | } |
2192 | ||
e2ebc74d | 2193 | |
e2530083 JB |
2194 | /* |
2195 | * ieee80211_clear_tx_pending may not be called in a context where | |
2196 | * it is possible that it packets could come in again. | |
2197 | */ | |
e2ebc74d JB |
2198 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2199 | { | |
1f98ab7f | 2200 | struct sk_buff *skb; |
2de8e0d9 | 2201 | int i; |
e2ebc74d | 2202 | |
1f98ab7f FF |
2203 | for (i = 0; i < local->hw.queues; i++) { |
2204 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2205 | ieee80211_free_txskb(&local->hw, skb); | |
2206 | } | |
e2ebc74d JB |
2207 | } |
2208 | ||
7bb45683 JB |
2209 | /* |
2210 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2211 | * which in this case means re-queued -- take as an indication to stop sending | |
2212 | * more pending frames. | |
2213 | */ | |
cd8ffc80 JB |
2214 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2215 | struct sk_buff *skb) | |
2216 | { | |
2217 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2218 | struct ieee80211_sub_if_data *sdata; | |
2219 | struct sta_info *sta; | |
2220 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2221 | bool result; |
55de908a | 2222 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2223 | |
5061b0c2 | 2224 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2225 | |
2226 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2227 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2228 | if (unlikely(!chanctx_conf)) { | |
2229 | dev_kfree_skb(skb); | |
2230 | return true; | |
2231 | } | |
2232 | result = ieee80211_tx(sdata, skb, true, | |
4bf88530 | 2233 | chanctx_conf->def.chan->band); |
cd8ffc80 | 2234 | } else { |
252b86c4 JB |
2235 | struct sk_buff_head skbs; |
2236 | ||
2237 | __skb_queue_head_init(&skbs); | |
2238 | __skb_queue_tail(&skbs, skb); | |
2239 | ||
cd8ffc80 | 2240 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2241 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2242 | |
74e4dbfd | 2243 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2244 | } |
2245 | ||
cd8ffc80 JB |
2246 | return result; |
2247 | } | |
2248 | ||
e2530083 | 2249 | /* |
3b8d81e0 | 2250 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2251 | */ |
e2ebc74d JB |
2252 | void ieee80211_tx_pending(unsigned long data) |
2253 | { | |
2254 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2255 | unsigned long flags; |
cd8ffc80 | 2256 | int i; |
3b8d81e0 | 2257 | bool txok; |
e2ebc74d | 2258 | |
f0e72851 | 2259 | rcu_read_lock(); |
e2530083 | 2260 | |
3b8d81e0 | 2261 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2262 | for (i = 0; i < local->hw.queues; i++) { |
2263 | /* | |
2264 | * If queue is stopped by something other than due to pending | |
2265 | * frames, or we have no pending frames, proceed to next queue. | |
2266 | */ | |
3b8d81e0 | 2267 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2268 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2269 | continue; |
e2530083 | 2270 | |
2a577d98 | 2271 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2272 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2273 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2274 | |
a7bc376c | 2275 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2276 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2277 | continue; |
2278 | } | |
2279 | ||
3b8d81e0 JB |
2280 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2281 | flags); | |
2282 | ||
2283 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2284 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2285 | flags); | |
2286 | if (!txok) | |
2a577d98 | 2287 | break; |
e2ebc74d | 2288 | } |
7236fe29 JB |
2289 | |
2290 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2291 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2292 | } |
3b8d81e0 | 2293 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2294 | |
f0e72851 | 2295 | rcu_read_unlock(); |
e2ebc74d JB |
2296 | } |
2297 | ||
2298 | /* functions for drivers to get certain frames */ | |
2299 | ||
eac70c13 MP |
2300 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2301 | struct ps_data *ps, struct sk_buff *skb) | |
e2ebc74d JB |
2302 | { |
2303 | u8 *pos, *tim; | |
2304 | int aid0 = 0; | |
2305 | int i, have_bits = 0, n1, n2; | |
2306 | ||
2307 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2308 | * mode. */ | |
d012a605 | 2309 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2310 | /* in the hope that this is faster than |
2311 | * checking byte-for-byte */ | |
d012a605 | 2312 | have_bits = !bitmap_empty((unsigned long*)ps->tim, |
e2ebc74d JB |
2313 | IEEE80211_MAX_AID+1); |
2314 | ||
d012a605 MP |
2315 | if (ps->dtim_count == 0) |
2316 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
e2ebc74d | 2317 | else |
d012a605 | 2318 | ps->dtim_count--; |
e2ebc74d JB |
2319 | |
2320 | tim = pos = (u8 *) skb_put(skb, 6); | |
2321 | *pos++ = WLAN_EID_TIM; | |
2322 | *pos++ = 4; | |
d012a605 | 2323 | *pos++ = ps->dtim_count; |
8860020e | 2324 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2325 | |
d012a605 | 2326 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2327 | aid0 = 1; |
2328 | ||
d012a605 | 2329 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2330 | |
e2ebc74d JB |
2331 | if (have_bits) { |
2332 | /* Find largest even number N1 so that bits numbered 1 through | |
2333 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2334 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2335 | n1 = 0; | |
2336 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2337 | if (ps->tim[i]) { |
e2ebc74d JB |
2338 | n1 = i & 0xfe; |
2339 | break; | |
2340 | } | |
2341 | } | |
2342 | n2 = n1; | |
2343 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2344 | if (ps->tim[i]) { |
e2ebc74d JB |
2345 | n2 = i; |
2346 | break; | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | /* Bitmap control */ | |
2351 | *pos++ = n1 | aid0; | |
2352 | /* Part Virt Bitmap */ | |
5220da39 | 2353 | skb_put(skb, n2 - n1); |
d012a605 | 2354 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2355 | |
2356 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2357 | } else { |
2358 | *pos++ = aid0; /* Bitmap control */ | |
2359 | *pos++ = 0; /* Part Virt Bitmap */ | |
2360 | } | |
e2ebc74d JB |
2361 | } |
2362 | ||
eac70c13 MP |
2363 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2364 | struct ps_data *ps, struct sk_buff *skb) | |
2365 | { | |
2366 | struct ieee80211_local *local = sdata->local; | |
2367 | ||
2368 | /* | |
2369 | * Not very nice, but we want to allow the driver to call | |
2370 | * ieee80211_beacon_get() as a response to the set_tim() | |
2371 | * callback. That, however, is already invoked under the | |
2372 | * sta_lock to guarantee consistent and race-free update | |
2373 | * of the tim bitmap in mac80211 and the driver. | |
2374 | */ | |
2375 | if (local->tim_in_locked_section) { | |
2376 | __ieee80211_beacon_add_tim(sdata, ps, skb); | |
2377 | } else { | |
1b91731d | 2378 | spin_lock_bh(&local->tim_lock); |
eac70c13 | 2379 | __ieee80211_beacon_add_tim(sdata, ps, skb); |
1b91731d | 2380 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2381 | } |
2382 | ||
2383 | return 0; | |
2384 | } | |
2385 | ||
eddcbb94 JB |
2386 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2387 | struct ieee80211_vif *vif, | |
2388 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2389 | { |
2390 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2391 | struct sk_buff *skb = NULL; |
e039fa4a | 2392 | struct ieee80211_tx_info *info; |
e2ebc74d | 2393 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2394 | enum ieee80211_band band; |
e00cfce0 | 2395 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2396 | struct ieee80211_chanctx_conf *chanctx_conf; |
8318d78a | 2397 | |
5dfdaf58 | 2398 | rcu_read_lock(); |
e2ebc74d | 2399 | |
32bfd35d | 2400 | sdata = vif_to_sdata(vif); |
55de908a | 2401 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2402 | |
55de908a | 2403 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2404 | goto out; |
2405 | ||
eddcbb94 JB |
2406 | if (tim_offset) |
2407 | *tim_offset = 0; | |
2408 | if (tim_length) | |
2409 | *tim_length = 0; | |
2410 | ||
05c914fe | 2411 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 MP |
2412 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
2413 | struct beacon_data *beacon = rcu_dereference(ap->beacon); | |
2414 | ||
3ad97fbc | 2415 | if (beacon) { |
902acc78 JB |
2416 | /* |
2417 | * headroom, head length, | |
2418 | * tail length and maximum TIM length | |
2419 | */ | |
2420 | skb = dev_alloc_skb(local->tx_headroom + | |
2421 | beacon->head_len + | |
2422 | beacon->tail_len + 256); | |
2423 | if (!skb) | |
2424 | goto out; | |
33b64eb2 | 2425 | |
902acc78 JB |
2426 | skb_reserve(skb, local->tx_headroom); |
2427 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2428 | beacon->head_len); | |
33b64eb2 | 2429 | |
eac70c13 | 2430 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb); |
33b64eb2 | 2431 | |
eddcbb94 JB |
2432 | if (tim_offset) |
2433 | *tim_offset = beacon->head_len; | |
2434 | if (tim_length) | |
2435 | *tim_length = skb->len - beacon->head_len; | |
2436 | ||
902acc78 JB |
2437 | if (beacon->tail) |
2438 | memcpy(skb_put(skb, beacon->tail_len), | |
2439 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2440 | } else |
2441 | goto out; | |
05c914fe | 2442 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2443 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2444 | struct ieee80211_hdr *hdr; |
c3ffeab4 | 2445 | struct beacon_data *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2446 | |
af8cdcd8 | 2447 | if (!presp) |
9d139c81 JB |
2448 | goto out; |
2449 | ||
c3ffeab4 | 2450 | skb = dev_alloc_skb(local->tx_headroom + presp->head_len); |
9d139c81 JB |
2451 | if (!skb) |
2452 | goto out; | |
c3ffeab4 JB |
2453 | skb_reserve(skb, local->tx_headroom); |
2454 | memcpy(skb_put(skb, presp->head_len), presp->head, | |
2455 | presp->head_len); | |
9d139c81 JB |
2456 | |
2457 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2458 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2459 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2460 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2461 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 2462 | struct beacon_data *bcn = rcu_dereference(ifmsh->beacon); |
472dbc45 | 2463 | |
2b5e1967 | 2464 | if (!bcn) |
ac1bd846 | 2465 | goto out; |
ac1bd846 | 2466 | |
dbf498fb JC |
2467 | if (ifmsh->sync_ops) |
2468 | ifmsh->sync_ops->adjust_tbtt( | |
2469 | sdata); | |
2470 | ||
3b69a9c5 | 2471 | skb = dev_alloc_skb(local->tx_headroom + |
2b5e1967 | 2472 | bcn->head_len + |
3f52b7e3 | 2473 | 256 + /* TIM IE */ |
2b5e1967 | 2474 | bcn->tail_len); |
902acc78 JB |
2475 | if (!skb) |
2476 | goto out; | |
2b5e1967 TP |
2477 | skb_reserve(skb, local->tx_headroom); |
2478 | memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len); | |
2479 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb); | |
2480 | memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len); | |
9d139c81 JB |
2481 | } else { |
2482 | WARN_ON(1); | |
5dfdaf58 | 2483 | goto out; |
e2ebc74d JB |
2484 | } |
2485 | ||
4bf88530 | 2486 | band = chanctx_conf->def.chan->band; |
55de908a | 2487 | |
e039fa4a JB |
2488 | info = IEEE80211_SKB_CB(skb); |
2489 | ||
3b8d81e0 | 2490 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2491 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2492 | info->band = band; |
e00cfce0 JM |
2493 | |
2494 | memset(&txrc, 0, sizeof(txrc)); | |
2495 | txrc.hw = hw; | |
e31583cd | 2496 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2497 | txrc.bss_conf = &sdata->vif.bss_conf; |
2498 | txrc.skb = skb; | |
2499 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2500 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2501 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2502 | txrc.max_rate_idx = -1; |
2503 | else | |
2504 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
19468413 SW |
2505 | memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band], |
2506 | sizeof(txrc.rate_idx_mcs_mask)); | |
8f0729b1 | 2507 | txrc.bss = true; |
e00cfce0 | 2508 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2509 | |
2510 | info->control.vif = vif; | |
f591fa5d | 2511 | |
a472e71b JL |
2512 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2513 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2514 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2515 | out: |
5dfdaf58 | 2516 | rcu_read_unlock(); |
e2ebc74d JB |
2517 | return skb; |
2518 | } | |
eddcbb94 | 2519 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2520 | |
02945821 AN |
2521 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2522 | struct ieee80211_vif *vif) | |
2523 | { | |
2524 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2525 | struct sk_buff *skb = NULL; |
2526 | struct probe_resp *presp = NULL; | |
02945821 AN |
2527 | struct ieee80211_hdr *hdr; |
2528 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2529 | ||
2530 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2531 | return NULL; | |
2532 | ||
2533 | rcu_read_lock(); | |
2534 | ||
2535 | ap = &sdata->u.ap; | |
2536 | presp = rcu_dereference(ap->probe_resp); | |
2537 | if (!presp) | |
2538 | goto out; | |
2539 | ||
aa7a0080 | 2540 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2541 | if (!skb) |
2542 | goto out; | |
2543 | ||
aa7a0080 ES |
2544 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2545 | ||
02945821 AN |
2546 | hdr = (struct ieee80211_hdr *) skb->data; |
2547 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2548 | ||
2549 | out: | |
2550 | rcu_read_unlock(); | |
2551 | return skb; | |
2552 | } | |
2553 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2554 | ||
7044cc56 KV |
2555 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2556 | struct ieee80211_vif *vif) | |
2557 | { | |
2558 | struct ieee80211_sub_if_data *sdata; | |
2559 | struct ieee80211_if_managed *ifmgd; | |
2560 | struct ieee80211_pspoll *pspoll; | |
2561 | struct ieee80211_local *local; | |
2562 | struct sk_buff *skb; | |
2563 | ||
2564 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2565 | return NULL; | |
2566 | ||
2567 | sdata = vif_to_sdata(vif); | |
2568 | ifmgd = &sdata->u.mgd; | |
2569 | local = sdata->local; | |
2570 | ||
2571 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2572 | if (!skb) |
7044cc56 | 2573 | return NULL; |
d15b8459 | 2574 | |
7044cc56 KV |
2575 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2576 | ||
2577 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2578 | memset(pspoll, 0, sizeof(*pspoll)); | |
2579 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2580 | IEEE80211_STYPE_PSPOLL); | |
2581 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2582 | ||
2583 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2584 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2585 | ||
2586 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2587 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2588 | ||
2589 | return skb; | |
2590 | } | |
2591 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2592 | ||
2593 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2594 | struct ieee80211_vif *vif) | |
2595 | { | |
2596 | struct ieee80211_hdr_3addr *nullfunc; | |
2597 | struct ieee80211_sub_if_data *sdata; | |
2598 | struct ieee80211_if_managed *ifmgd; | |
2599 | struct ieee80211_local *local; | |
2600 | struct sk_buff *skb; | |
2601 | ||
2602 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2603 | return NULL; | |
2604 | ||
2605 | sdata = vif_to_sdata(vif); | |
2606 | ifmgd = &sdata->u.mgd; | |
2607 | local = sdata->local; | |
2608 | ||
2609 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2610 | if (!skb) |
7044cc56 | 2611 | return NULL; |
d15b8459 | 2612 | |
7044cc56 KV |
2613 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2614 | ||
2615 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2616 | sizeof(*nullfunc)); | |
2617 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2618 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2619 | IEEE80211_STYPE_NULLFUNC | | |
2620 | IEEE80211_FCTL_TODS); | |
2621 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2622 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2623 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2624 | ||
2625 | return skb; | |
2626 | } | |
2627 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2628 | ||
05e54ea6 KV |
2629 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2630 | struct ieee80211_vif *vif, | |
2631 | const u8 *ssid, size_t ssid_len, | |
b9a9ada1 | 2632 | size_t tailroom) |
05e54ea6 KV |
2633 | { |
2634 | struct ieee80211_sub_if_data *sdata; | |
2635 | struct ieee80211_local *local; | |
2636 | struct ieee80211_hdr_3addr *hdr; | |
2637 | struct sk_buff *skb; | |
2638 | size_t ie_ssid_len; | |
2639 | u8 *pos; | |
2640 | ||
2641 | sdata = vif_to_sdata(vif); | |
2642 | local = sdata->local; | |
2643 | ie_ssid_len = 2 + ssid_len; | |
2644 | ||
2645 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2646 | ie_ssid_len + tailroom); |
d15b8459 | 2647 | if (!skb) |
05e54ea6 | 2648 | return NULL; |
05e54ea6 KV |
2649 | |
2650 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2651 | ||
2652 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2653 | memset(hdr, 0, sizeof(*hdr)); | |
2654 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2655 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 2656 | eth_broadcast_addr(hdr->addr1); |
05e54ea6 | 2657 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
e83e6541 | 2658 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
2659 | |
2660 | pos = skb_put(skb, ie_ssid_len); | |
2661 | *pos++ = WLAN_EID_SSID; | |
2662 | *pos++ = ssid_len; | |
88c868c4 | 2663 | if (ssid_len) |
05e54ea6 KV |
2664 | memcpy(pos, ssid, ssid_len); |
2665 | pos += ssid_len; | |
2666 | ||
05e54ea6 KV |
2667 | return skb; |
2668 | } | |
2669 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2670 | ||
32bfd35d | 2671 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2672 | const void *frame, size_t frame_len, |
e039fa4a | 2673 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2674 | struct ieee80211_rts *rts) |
2675 | { | |
2676 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2677 | |
065e9605 HH |
2678 | rts->frame_control = |
2679 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2680 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2681 | frame_txctl); | |
e2ebc74d JB |
2682 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2683 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2684 | } | |
2685 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2686 | ||
32bfd35d | 2687 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2688 | const void *frame, size_t frame_len, |
e039fa4a | 2689 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2690 | struct ieee80211_cts *cts) |
2691 | { | |
2692 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2693 | |
065e9605 HH |
2694 | cts->frame_control = |
2695 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2696 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2697 | frame_len, frame_txctl); | |
e2ebc74d JB |
2698 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2699 | } | |
2700 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2701 | ||
2702 | struct sk_buff * | |
32bfd35d | 2703 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2704 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2705 | { |
2706 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2707 | struct sk_buff *skb = NULL; |
5cf121c3 | 2708 | struct ieee80211_tx_data tx; |
e2ebc74d | 2709 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 2710 | struct ps_data *ps; |
e039fa4a | 2711 | struct ieee80211_tx_info *info; |
55de908a | 2712 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 2713 | |
32bfd35d | 2714 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 2715 | |
5dfdaf58 | 2716 | rcu_read_lock(); |
55de908a | 2717 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 2718 | |
d012a605 MP |
2719 | if (!chanctx_conf) |
2720 | goto out; | |
2721 | ||
2722 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
2723 | struct beacon_data *beacon = | |
2724 | rcu_dereference(sdata->u.ap.beacon); | |
2725 | ||
2726 | if (!beacon || !beacon->head) | |
2727 | goto out; | |
2728 | ||
2729 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
2730 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2731 | ps = &sdata->u.mesh.ps; | |
d012a605 | 2732 | } else { |
747cf5e9 | 2733 | goto out; |
d012a605 | 2734 | } |
5dfdaf58 | 2735 | |
d012a605 | 2736 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 2737 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2738 | |
e2ebc74d | 2739 | while (1) { |
d012a605 | 2740 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 2741 | if (!skb) |
747cf5e9 | 2742 | goto out; |
e2ebc74d JB |
2743 | local->total_ps_buffered--; |
2744 | ||
d012a605 | 2745 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
2746 | struct ieee80211_hdr *hdr = |
2747 | (struct ieee80211_hdr *) skb->data; | |
2748 | /* more buffered multicast/broadcast frames ==> set | |
2749 | * MoreData flag in IEEE 802.11 header to inform PS | |
2750 | * STAs */ | |
2751 | hdr->frame_control |= | |
2752 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2753 | } | |
2754 | ||
7cbf9d01 MP |
2755 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
2756 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); | |
3b8d81e0 | 2757 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2758 | break; |
2759 | dev_kfree_skb_any(skb); | |
2760 | } | |
e039fa4a JB |
2761 | |
2762 | info = IEEE80211_SKB_CB(skb); | |
2763 | ||
5cf121c3 | 2764 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 2765 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 2766 | |
97b045d6 | 2767 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2768 | skb = NULL; |
97b045d6 | 2769 | out: |
d0709a65 | 2770 | rcu_read_unlock(); |
e2ebc74d JB |
2771 | |
2772 | return skb; | |
2773 | } | |
2774 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2775 | |
55de908a JB |
2776 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
2777 | struct sk_buff *skb, int tid, | |
2778 | enum ieee80211_band band) | |
3b8d81e0 | 2779 | { |
353d09c6 | 2780 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 2781 | |
3b8d81e0 JB |
2782 | skb_set_mac_header(skb, 0); |
2783 | skb_set_network_header(skb, 0); | |
2784 | skb_set_transport_header(skb, 0); | |
2785 | ||
3a25a8c8 | 2786 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 2787 | skb->priority = tid; |
cf0277e7 | 2788 | |
89afe614 JB |
2789 | skb->dev = sdata->dev; |
2790 | ||
3d34deb6 JB |
2791 | /* |
2792 | * The other path calling ieee80211_xmit is from the tasklet, | |
2793 | * and while we can handle concurrent transmissions locking | |
2794 | * requirements are that we do not come into tx with bhs on. | |
2795 | */ | |
2796 | local_bh_disable(); | |
55de908a | 2797 | ieee80211_xmit(sdata, skb, band); |
3d34deb6 | 2798 | local_bh_enable(); |
3b8d81e0 | 2799 | } |