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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 | |
2e92e6f2 | 58 | sband = local->hw.wiphy->bands[tx->channel->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, | |
236 | IEEE80211_QUEUE_STOP_REASON_PS); | |
db28569a | 237 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
238 | ieee80211_queue_work(&local->hw, |
239 | &local->dynamic_ps_disable_work); | |
240 | } | |
241 | ||
5db1c07c LC |
242 | /* Don't restart the timer if we're not disassociated */ |
243 | if (!ifmgd->associated) | |
244 | return TX_CONTINUE; | |
245 | ||
5c1b98a5 KV |
246 | mod_timer(&local->dynamic_ps_timer, jiffies + |
247 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
248 | ||
249 | return TX_CONTINUE; | |
250 | } | |
e2ebc74d | 251 | |
d9e8a70f | 252 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 253 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 254 | { |
358c8d9d | 255 | |
e039fa4a | 256 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 257 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 258 | bool assoc = false; |
e2ebc74d | 259 | |
e039fa4a | 260 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 261 | return TX_CONTINUE; |
58d4185e | 262 | |
b23b025f BG |
263 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
264 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
265 | !ieee80211_is_probe_req(hdr->frame_control) && |
266 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
267 | /* | |
268 | * When software scanning only nullfunc frames (to notify | |
269 | * the sleep state to the AP) and probe requests (for the | |
270 | * active scan) are allowed, all other frames should not be | |
271 | * sent and we should not get here, but if we do | |
272 | * nonetheless, drop them to avoid sending them | |
273 | * off-channel. See the link below and | |
274 | * ieee80211_start_scan() for more. | |
275 | * | |
276 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
277 | */ | |
9ae54c84 | 278 | return TX_DROP; |
e2ebc74d | 279 | |
1be7fe8d BJ |
280 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
281 | return TX_CONTINUE; | |
282 | ||
05c914fe | 283 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
284 | return TX_CONTINUE; |
285 | ||
5cf121c3 | 286 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 287 | return TX_CONTINUE; |
e2ebc74d | 288 | |
c2c98fde JB |
289 | if (tx->sta) |
290 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 291 | |
5cf121c3 | 292 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 293 | if (unlikely(!assoc && |
358c8d9d | 294 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 295 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
296 | sdata_info(tx->sdata, |
297 | "dropped data frame to not associated station %pM\n", | |
298 | hdr->addr1); | |
299 | #endif | |
e2ebc74d | 300 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 301 | return TX_DROP; |
e2ebc74d | 302 | } |
29623892 JB |
303 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
304 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 305 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
306 | /* |
307 | * No associated STAs - no need to send multicast | |
308 | * frames. | |
309 | */ | |
310 | return TX_DROP; | |
e2ebc74d JB |
311 | } |
312 | ||
9ae54c84 | 313 | return TX_CONTINUE; |
e2ebc74d JB |
314 | } |
315 | ||
e2ebc74d JB |
316 | /* This function is called whenever the AP is about to exceed the maximum limit |
317 | * of buffered frames for power saving STAs. This situation should not really | |
318 | * happen often during normal operation, so dropping the oldest buffered packet | |
319 | * from each queue should be OK to make some room for new frames. */ | |
320 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
321 | { | |
322 | int total = 0, purged = 0; | |
323 | struct sk_buff *skb; | |
324 | struct ieee80211_sub_if_data *sdata; | |
325 | struct sta_info *sta; | |
326 | ||
79010420 JB |
327 | /* |
328 | * virtual interfaces are protected by RCU | |
329 | */ | |
330 | rcu_read_lock(); | |
331 | ||
332 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
e2ebc74d | 333 | struct ieee80211_if_ap *ap; |
05c914fe | 334 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
e2ebc74d JB |
335 | continue; |
336 | ap = &sdata->u.ap; | |
337 | skb = skb_dequeue(&ap->ps_bc_buf); | |
338 | if (skb) { | |
339 | purged++; | |
340 | dev_kfree_skb(skb); | |
341 | } | |
342 | total += skb_queue_len(&ap->ps_bc_buf); | |
343 | } | |
e2ebc74d | 344 | |
948d887d JB |
345 | /* |
346 | * Drop one frame from each station from the lowest-priority | |
347 | * AC that has frames at all. | |
348 | */ | |
d0709a65 | 349 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
350 | int ac; |
351 | ||
352 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
353 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
354 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
355 | if (skb) { | |
356 | purged++; | |
357 | dev_kfree_skb(skb); | |
358 | break; | |
359 | } | |
e2ebc74d | 360 | } |
e2ebc74d | 361 | } |
d0709a65 JB |
362 | |
363 | rcu_read_unlock(); | |
e2ebc74d JB |
364 | |
365 | local->total_ps_buffered = total; | |
bdcbd8e0 | 366 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
367 | } |
368 | ||
9ae54c84 | 369 | static ieee80211_tx_result |
5cf121c3 | 370 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 371 | { |
e039fa4a | 372 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 373 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 374 | |
7d54d0dd JB |
375 | /* |
376 | * broadcast/multicast frame | |
377 | * | |
378 | * If any of the associated stations is in power save mode, | |
379 | * the frame is buffered to be sent after DTIM beacon frame. | |
380 | * This is done either by the hardware or us. | |
381 | */ | |
382 | ||
3e122be0 JB |
383 | /* powersaving STAs only in AP/VLAN mode */ |
384 | if (!tx->sdata->bss) | |
385 | return TX_CONTINUE; | |
386 | ||
387 | /* no buffering for ordered frames */ | |
358c8d9d | 388 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 389 | return TX_CONTINUE; |
7d54d0dd JB |
390 | |
391 | /* no stations in PS mode */ | |
392 | if (!atomic_read(&tx->sdata->bss->num_sta_ps)) | |
9ae54c84 | 393 | return TX_CONTINUE; |
7d54d0dd | 394 | |
62b517cb | 395 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
3a25a8c8 JB |
396 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
397 | info->hw_queue = tx->sdata->vif.cab_queue; | |
62b1208e | 398 | |
62b517cb JB |
399 | /* device releases frame after DTIM beacon */ |
400 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 401 | return TX_CONTINUE; |
62b1208e | 402 | |
7d54d0dd | 403 | /* buffered in mac80211 */ |
62b1208e JB |
404 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
405 | purge_old_ps_buffers(tx->local); | |
406 | ||
407 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) { | |
bdcbd8e0 JB |
408 | ps_dbg(tx->sdata, |
409 | "BC TX buffer full - dropping the oldest frame\n"); | |
62b1208e JB |
410 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); |
411 | } else | |
412 | tx->local->total_ps_buffered++; | |
e2ebc74d | 413 | |
62b1208e | 414 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); |
7d54d0dd | 415 | |
62b1208e | 416 | return TX_QUEUED; |
e2ebc74d JB |
417 | } |
418 | ||
fb733336 JM |
419 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
420 | struct sk_buff *skb) | |
421 | { | |
422 | if (!ieee80211_is_mgmt(fc)) | |
423 | return 0; | |
424 | ||
c2c98fde | 425 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
426 | return 0; |
427 | ||
428 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
429 | skb->data)) | |
430 | return 0; | |
431 | ||
432 | return 1; | |
433 | } | |
434 | ||
9ae54c84 | 435 | static ieee80211_tx_result |
5cf121c3 | 436 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
437 | { |
438 | struct sta_info *sta = tx->sta; | |
e039fa4a | 439 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 440 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 441 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 442 | |
02f2f1a9 | 443 | if (unlikely(!sta)) |
9ae54c84 | 444 | return TX_CONTINUE; |
e2ebc74d | 445 | |
c2c98fde JB |
446 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
447 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && | |
02f2f1a9 | 448 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
449 | int ac = skb_get_queue_mapping(tx->skb); |
450 | ||
02f2f1a9 JB |
451 | /* only deauth, disassoc and action are bufferable MMPDUs */ |
452 | if (ieee80211_is_mgmt(hdr->frame_control) && | |
453 | !ieee80211_is_deauth(hdr->frame_control) && | |
454 | !ieee80211_is_disassoc(hdr->frame_control) && | |
455 | !ieee80211_is_action(hdr->frame_control)) { | |
456 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
457 | return TX_CONTINUE; | |
458 | } | |
459 | ||
bdcbd8e0 JB |
460 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
461 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
462 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
463 | purge_old_ps_buffers(tx->local); | |
948d887d JB |
464 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
465 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
466 | ps_dbg(tx->sdata, |
467 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
468 | sta->sta.addr, ac); | |
e2ebc74d JB |
469 | dev_kfree_skb(old); |
470 | } else | |
471 | tx->local->total_ps_buffered++; | |
004c872e | 472 | |
e039fa4a | 473 | info->control.jiffies = jiffies; |
5061b0c2 | 474 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 475 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
948d887d | 476 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
3393a608 JO |
477 | |
478 | if (!timer_pending(&local->sta_cleanup)) | |
479 | mod_timer(&local->sta_cleanup, | |
480 | round_jiffies(jiffies + | |
481 | STA_INFO_CLEANUP_INTERVAL)); | |
482 | ||
c868cb35 JB |
483 | /* |
484 | * We queued up some frames, so the TIM bit might | |
485 | * need to be set, recalculate it. | |
486 | */ | |
487 | sta_info_recalc_tim(sta); | |
488 | ||
9ae54c84 | 489 | return TX_QUEUED; |
bdcbd8e0 JB |
490 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
491 | ps_dbg(tx->sdata, | |
492 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
493 | sta->sta.addr); | |
e2ebc74d | 494 | } |
e2ebc74d | 495 | |
9ae54c84 | 496 | return TX_CONTINUE; |
e2ebc74d JB |
497 | } |
498 | ||
d9e8a70f | 499 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 500 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 501 | { |
5cf121c3 | 502 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 503 | return TX_CONTINUE; |
e2ebc74d | 504 | |
5cf121c3 | 505 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
506 | return ieee80211_tx_h_unicast_ps_buf(tx); |
507 | else | |
508 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
509 | } | |
510 | ||
a621fa4d JB |
511 | static ieee80211_tx_result debug_noinline |
512 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
513 | { | |
514 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
515 | ||
516 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
517 | tx->sdata->control_port_no_encrypt)) | |
518 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
519 | ||
520 | return TX_CONTINUE; | |
521 | } | |
522 | ||
d9e8a70f | 523 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 524 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 525 | { |
46e6de15 | 526 | struct ieee80211_key *key; |
e039fa4a | 527 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 528 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 529 | |
3b8d81e0 | 530 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 531 | tx->key = NULL; |
e31b8213 | 532 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 533 | tx->key = key; |
3cfcf6ac | 534 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
535 | is_multicast_ether_addr(hdr->addr1) && |
536 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
537 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
538 | tx->key = key; | |
f7e0104c JB |
539 | else if (is_multicast_ether_addr(hdr->addr1) && |
540 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
541 | tx->key = key; | |
542 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
543 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 544 | tx->key = key; |
46e6de15 JB |
545 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
546 | tx->key = NULL; | |
547 | else if (!tx->sdata->drop_unencrypted) | |
548 | tx->key = NULL; | |
549 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
550 | tx->key = NULL; | |
551 | else if (ieee80211_is_robust_mgmt_frame(hdr) && | |
552 | !(ieee80211_is_action(hdr->frame_control) && | |
553 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
554 | tx->key = NULL; | |
555 | else { | |
e2ebc74d | 556 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 557 | return TX_DROP; |
46e6de15 | 558 | } |
e2ebc74d JB |
559 | |
560 | if (tx->key) { | |
813d7669 JB |
561 | bool skip_hw = false; |
562 | ||
e2ebc74d | 563 | tx->key->tx_rx_count++; |
011bfcc4 | 564 | /* TODO: add threshold stuff again */ |
176e4f84 | 565 | |
97359d12 JB |
566 | switch (tx->key->conf.cipher) { |
567 | case WLAN_CIPHER_SUITE_WEP40: | |
568 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 569 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 570 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
571 | tx->key = NULL; |
572 | break; | |
97359d12 | 573 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
574 | if (!ieee80211_is_data_present(hdr->frame_control) && |
575 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
576 | tx->skb)) | |
577 | tx->key = NULL; | |
3b43a187 KV |
578 | else |
579 | skip_hw = (tx->key->conf.flags & | |
580 | IEEE80211_KEY_FLAG_SW_MGMT) && | |
581 | ieee80211_is_mgmt(hdr->frame_control); | |
fb733336 | 582 | break; |
97359d12 | 583 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
584 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
585 | tx->key = NULL; | |
586 | break; | |
176e4f84 | 587 | } |
813d7669 | 588 | |
95acac61 JB |
589 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED)) |
590 | return TX_DROP; | |
591 | ||
f12553eb | 592 | if (!skip_hw && tx->key && |
382b1655 | 593 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 594 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
595 | } |
596 | ||
9ae54c84 | 597 | return TX_CONTINUE; |
e2ebc74d JB |
598 | } |
599 | ||
d9e8a70f | 600 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 601 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 602 | { |
e039fa4a | 603 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
604 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
605 | struct ieee80211_supported_band *sband; | |
606 | struct ieee80211_rate *rate; | |
a2c40249 SZ |
607 | int i; |
608 | u32 len; | |
e6a9854b JB |
609 | bool inval = false, rts = false, short_preamble = false; |
610 | struct ieee80211_tx_rate_control txrc; | |
c2c98fde | 611 | bool assoc = false; |
8318d78a | 612 | |
e6a9854b | 613 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 614 | |
e6a9854b | 615 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
58d4185e | 616 | |
a2c40249 | 617 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 618 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
619 | |
620 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 621 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
622 | txrc.sband = sband; |
623 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
624 | txrc.skb = tx->skb; | |
625 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
626 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[tx->channel->band]; |
627 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
628 | txrc.max_rate_idx = -1; | |
629 | else | |
630 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
19468413 SW |
631 | memcpy(txrc.rate_idx_mcs_mask, |
632 | tx->sdata->rc_rateidx_mcs_mask[tx->channel->band], | |
633 | sizeof(txrc.rate_idx_mcs_mask)); | |
8f0729b1 | 634 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 635 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 636 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
637 | |
638 | /* set up RTS protection if desired */ | |
b9a5f8ca | 639 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 640 | txrc.rts = rts = true; |
e2ebc74d | 641 | } |
e2ebc74d | 642 | |
e6a9854b JB |
643 | /* |
644 | * Use short preamble if the BSS can handle it, but not for | |
645 | * management frames unless we know the receiver can handle | |
646 | * that -- the management frame might be to a station that | |
647 | * just wants a probe response. | |
648 | */ | |
649 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
650 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 651 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
e6a9854b | 652 | txrc.short_preamble = short_preamble = true; |
e2ebc74d | 653 | |
c2c98fde JB |
654 | if (tx->sta) |
655 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
656 | |
657 | /* | |
658 | * Lets not bother rate control if we're associated and cannot | |
659 | * talk to the sta. This should not happen. | |
660 | */ | |
c2c98fde | 661 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
662 | !rate_usable_index_exists(sband, &tx->sta->sta), |
663 | "%s: Dropped data frame as no usable bitrate found while " | |
664 | "scanning and associated. Target station: " | |
665 | "%pM on %d GHz band\n", | |
47846c9b | 666 | tx->sdata->name, hdr->addr1, |
b770b43e LR |
667 | tx->channel->band ? 5 : 2)) |
668 | return TX_DROP; | |
2e92e6f2 | 669 | |
b770b43e LR |
670 | /* |
671 | * If we're associated with the sta at this point we know we can at | |
672 | * least send the frame at the lowest bit rate. | |
673 | */ | |
e6a9854b JB |
674 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
675 | ||
676 | if (unlikely(info->control.rates[0].idx < 0)) | |
677 | return TX_DROP; | |
678 | ||
c1ce5a74 | 679 | if (txrc.reported_rate.idx < 0) { |
e6a9854b | 680 | txrc.reported_rate = info->control.rates[0]; |
c1ce5a74 HS |
681 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
682 | tx->sta->last_tx_rate = txrc.reported_rate; | |
683 | } else if (tx->sta) | |
e6a9854b | 684 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 685 | |
e6a9854b JB |
686 | if (unlikely(!info->control.rates[0].count)) |
687 | info->control.rates[0].count = 1; | |
e2ebc74d | 688 | |
9955151d GS |
689 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
690 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
691 | info->control.rates[0].count = 1; | |
692 | ||
e6a9854b JB |
693 | if (is_multicast_ether_addr(hdr->addr1)) { |
694 | /* | |
695 | * XXX: verify the rate is in the basic rateset | |
696 | */ | |
697 | return TX_CONTINUE; | |
e2ebc74d JB |
698 | } |
699 | ||
e6a9854b JB |
700 | /* |
701 | * set up the RTS/CTS rate as the fastest basic rate | |
702 | * that is not faster than the data rate | |
703 | * | |
704 | * XXX: Should this check all retry rates? | |
705 | */ | |
706 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
707 | s8 baserate = 0; | |
708 | ||
709 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
710 | ||
711 | for (i = 0; i < sband->n_bitrates; i++) { | |
712 | /* must be a basic rate */ | |
713 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
714 | continue; | |
715 | /* must not be faster than the data rate */ | |
716 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
717 | continue; | |
718 | /* maximum */ | |
719 | if (sband->bitrates[baserate].bitrate < | |
720 | sband->bitrates[i].bitrate) | |
721 | baserate = i; | |
722 | } | |
723 | ||
724 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
725 | } |
726 | ||
e6a9854b JB |
727 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
728 | /* | |
729 | * make sure there's no valid rate following | |
730 | * an invalid one, just in case drivers don't | |
731 | * take the API seriously to stop at -1. | |
732 | */ | |
733 | if (inval) { | |
734 | info->control.rates[i].idx = -1; | |
735 | continue; | |
736 | } | |
737 | if (info->control.rates[i].idx < 0) { | |
738 | inval = true; | |
739 | continue; | |
740 | } | |
8318d78a | 741 | |
e6a9854b JB |
742 | /* |
743 | * For now assume MCS is already set up correctly, this | |
744 | * needs to be fixed. | |
745 | */ | |
746 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
747 | WARN_ON(info->control.rates[i].idx > 76); | |
748 | continue; | |
749 | } | |
e2ebc74d | 750 | |
e6a9854b JB |
751 | /* set up RTS protection if desired */ |
752 | if (rts) | |
753 | info->control.rates[i].flags |= | |
754 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 755 | |
e6a9854b | 756 | /* RC is busted */ |
075cbc9e S |
757 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
758 | sband->n_bitrates)) { | |
e6a9854b JB |
759 | info->control.rates[i].idx = -1; |
760 | continue; | |
8318d78a | 761 | } |
e2ebc74d | 762 | |
e6a9854b JB |
763 | rate = &sband->bitrates[info->control.rates[i].idx]; |
764 | ||
765 | /* set up short preamble */ | |
766 | if (short_preamble && | |
767 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
768 | info->control.rates[i].flags |= | |
769 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
770 | ||
771 | /* set up G protection */ | |
772 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
773 | rate->flags & IEEE80211_RATE_ERP_G) | |
774 | info->control.rates[i].flags |= | |
775 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
776 | } |
777 | ||
e6a9854b JB |
778 | return TX_CONTINUE; |
779 | } | |
780 | ||
f591fa5d JB |
781 | static ieee80211_tx_result debug_noinline |
782 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
783 | { | |
784 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
785 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
786 | u16 *seq; | |
787 | u8 *qc; | |
788 | int tid; | |
789 | ||
25d834e1 JB |
790 | /* |
791 | * Packet injection may want to control the sequence | |
792 | * number, if we have no matching interface then we | |
793 | * neither assign one ourselves nor ask the driver to. | |
794 | */ | |
5061b0c2 | 795 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
796 | return TX_CONTINUE; |
797 | ||
f591fa5d JB |
798 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
799 | return TX_CONTINUE; | |
800 | ||
801 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
802 | return TX_CONTINUE; | |
803 | ||
49a59543 JB |
804 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
805 | return TX_CONTINUE; | |
806 | ||
94778280 JB |
807 | /* |
808 | * Anything but QoS data that has a sequence number field | |
809 | * (is long enough) gets a sequence number from the global | |
810 | * counter. | |
811 | */ | |
f591fa5d | 812 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 813 | /* driver should assign sequence number */ |
f591fa5d | 814 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
815 | /* for pure STA mode without beacons, we can do it */ |
816 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
817 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
818 | return TX_CONTINUE; |
819 | } | |
820 | ||
821 | /* | |
822 | * This should be true for injected/management frames only, for | |
823 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
824 | * above since they are not QoS-data frames. | |
825 | */ | |
826 | if (!tx->sta) | |
827 | return TX_CONTINUE; | |
828 | ||
829 | /* include per-STA, per-TID sequence counter */ | |
830 | ||
831 | qc = ieee80211_get_qos_ctl(hdr); | |
832 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
833 | seq = &tx->sta->tid_seq[tid]; | |
834 | ||
835 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
836 | ||
837 | /* Increase the sequence number. */ | |
838 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
839 | ||
840 | return TX_CONTINUE; | |
841 | } | |
842 | ||
252b86c4 | 843 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
844 | struct sk_buff *skb, int hdrlen, |
845 | int frag_threshold) | |
846 | { | |
252b86c4 | 847 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 848 | struct ieee80211_tx_info *info; |
252b86c4 | 849 | struct sk_buff *tmp; |
2de8e0d9 JB |
850 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
851 | int pos = hdrlen + per_fragm; | |
852 | int rem = skb->len - hdrlen - per_fragm; | |
853 | ||
854 | if (WARN_ON(rem < 0)) | |
855 | return -EINVAL; | |
856 | ||
252b86c4 JB |
857 | /* first fragment was already added to queue by caller */ |
858 | ||
2de8e0d9 JB |
859 | while (rem) { |
860 | int fraglen = per_fragm; | |
861 | ||
862 | if (fraglen > rem) | |
863 | fraglen = rem; | |
864 | rem -= fraglen; | |
865 | tmp = dev_alloc_skb(local->tx_headroom + | |
866 | frag_threshold + | |
867 | IEEE80211_ENCRYPT_HEADROOM + | |
868 | IEEE80211_ENCRYPT_TAILROOM); | |
869 | if (!tmp) | |
870 | return -ENOMEM; | |
252b86c4 JB |
871 | |
872 | __skb_queue_tail(&tx->skbs, tmp); | |
873 | ||
2de8e0d9 JB |
874 | skb_reserve(tmp, local->tx_headroom + |
875 | IEEE80211_ENCRYPT_HEADROOM); | |
876 | /* copy control information */ | |
877 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
878 | |
879 | info = IEEE80211_SKB_CB(tmp); | |
880 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
881 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
882 | ||
883 | if (rem) | |
884 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
885 | ||
2de8e0d9 JB |
886 | skb_copy_queue_mapping(tmp, skb); |
887 | tmp->priority = skb->priority; | |
2de8e0d9 | 888 | tmp->dev = skb->dev; |
2de8e0d9 JB |
889 | |
890 | /* copy header and data */ | |
891 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
892 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
893 | ||
894 | pos += fraglen; | |
895 | } | |
896 | ||
252b86c4 | 897 | /* adjust first fragment's length */ |
2de8e0d9 JB |
898 | skb->len = hdrlen + per_fragm; |
899 | return 0; | |
900 | } | |
901 | ||
d9e8a70f | 902 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
903 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
904 | { | |
2de8e0d9 JB |
905 | struct sk_buff *skb = tx->skb; |
906 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
907 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 908 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
909 | int hdrlen; |
910 | int fragnum; | |
e2454948 | 911 | |
252b86c4 JB |
912 | /* no matter what happens, tx->skb moves to tx->skbs */ |
913 | __skb_queue_tail(&tx->skbs, skb); | |
914 | tx->skb = NULL; | |
915 | ||
a26eb27a JB |
916 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
917 | return TX_CONTINUE; | |
918 | ||
919 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
920 | return TX_CONTINUE; |
921 | ||
eefce91a JB |
922 | /* |
923 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 924 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 925 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 926 | */ |
8b30b1fe | 927 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
928 | return TX_DROP; |
929 | ||
065e9605 | 930 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 931 | |
a26eb27a | 932 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 933 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 934 | return TX_DROP; |
e6a9854b | 935 | |
2de8e0d9 JB |
936 | /* |
937 | * Now fragment the frame. This will allocate all the fragments and | |
938 | * chain them (using skb as the first fragment) to skb->next. | |
939 | * During transmission, we will remove the successfully transmitted | |
940 | * fragments from this list. When the low-level driver rejects one | |
941 | * of the fragments then we will simply pretend to accept the skb | |
942 | * but store it away as pending. | |
943 | */ | |
252b86c4 | 944 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 945 | return TX_DROP; |
e6a9854b | 946 | |
2de8e0d9 JB |
947 | /* update duration/seq/flags of fragments */ |
948 | fragnum = 0; | |
252b86c4 JB |
949 | |
950 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 JB |
951 | int next_len; |
952 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
e6a9854b | 953 | |
2de8e0d9 JB |
954 | hdr = (void *)skb->data; |
955 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 956 | |
252b86c4 | 957 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 958 | hdr->frame_control |= morefrags; |
e6a9854b JB |
959 | /* |
960 | * No multi-rate retries for fragmented frames, that | |
961 | * would completely throw off the NAV at other STAs. | |
962 | */ | |
963 | info->control.rates[1].idx = -1; | |
964 | info->control.rates[2].idx = -1; | |
965 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 966 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 967 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
968 | } else { |
969 | hdr->frame_control &= ~morefrags; | |
970 | next_len = 0; | |
e6a9854b | 971 | } |
2de8e0d9 JB |
972 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
973 | fragnum++; | |
252b86c4 | 974 | } |
e2ebc74d | 975 | |
9ae54c84 | 976 | return TX_CONTINUE; |
e2ebc74d JB |
977 | } |
978 | ||
feff1f2f JB |
979 | static ieee80211_tx_result debug_noinline |
980 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
981 | { | |
252b86c4 | 982 | struct sk_buff *skb; |
feff1f2f JB |
983 | |
984 | if (!tx->sta) | |
985 | return TX_CONTINUE; | |
986 | ||
987 | tx->sta->tx_packets++; | |
252b86c4 | 988 | skb_queue_walk(&tx->skbs, skb) { |
feff1f2f JB |
989 | tx->sta->tx_fragments++; |
990 | tx->sta->tx_bytes += skb->len; | |
252b86c4 | 991 | } |
feff1f2f JB |
992 | |
993 | return TX_CONTINUE; | |
994 | } | |
995 | ||
d9e8a70f | 996 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
997 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
998 | { | |
999 | if (!tx->key) | |
1000 | return TX_CONTINUE; | |
1001 | ||
97359d12 JB |
1002 | switch (tx->key->conf.cipher) { |
1003 | case WLAN_CIPHER_SUITE_WEP40: | |
1004 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1005 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1006 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1007 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1008 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 1009 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 1010 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1011 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 1012 | default: |
d32a1028 | 1013 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1014 | } |
1015 | ||
e2454948 JB |
1016 | return TX_DROP; |
1017 | } | |
1018 | ||
d9e8a70f | 1019 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1020 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1021 | { | |
252b86c4 | 1022 | struct sk_buff *skb; |
2de8e0d9 JB |
1023 | struct ieee80211_hdr *hdr; |
1024 | int next_len; | |
1025 | bool group_addr; | |
03f93c3d | 1026 | |
252b86c4 | 1027 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1028 | hdr = (void *) skb->data; |
7e0aae47 JM |
1029 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1030 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1031 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1032 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1033 | next_len = next->len; | |
1034 | } else | |
1035 | next_len = 0; | |
2de8e0d9 | 1036 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1037 | |
2de8e0d9 | 1038 | hdr->duration_id = |
252b86c4 JB |
1039 | ieee80211_duration(tx, skb, group_addr, next_len); |
1040 | } | |
03f93c3d JB |
1041 | |
1042 | return TX_CONTINUE; | |
1043 | } | |
1044 | ||
e2ebc74d JB |
1045 | /* actual transmit path */ |
1046 | ||
a622ab72 JB |
1047 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1048 | struct sk_buff *skb, | |
1049 | struct ieee80211_tx_info *info, | |
1050 | struct tid_ampdu_tx *tid_tx, | |
1051 | int tid) | |
1052 | { | |
1053 | bool queued = false; | |
285fa695 | 1054 | bool reset_agg_timer = false; |
aa454580 | 1055 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1056 | |
1057 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1058 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1059 | reset_agg_timer = true; |
0ab33703 JB |
1060 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1061 | /* | |
1062 | * nothing -- this aggregation session is being started | |
1063 | * but that might still fail with the driver | |
1064 | */ | |
a622ab72 JB |
1065 | } else { |
1066 | spin_lock(&tx->sta->lock); | |
1067 | /* | |
1068 | * Need to re-check now, because we may get here | |
1069 | * | |
1070 | * 1) in the window during which the setup is actually | |
1071 | * already done, but not marked yet because not all | |
1072 | * packets are spliced over to the driver pending | |
1073 | * queue yet -- if this happened we acquire the lock | |
1074 | * either before or after the splice happens, but | |
1075 | * need to recheck which of these cases happened. | |
1076 | * | |
1077 | * 2) during session teardown, if the OPERATIONAL bit | |
1078 | * was cleared due to the teardown but the pointer | |
1079 | * hasn't been assigned NULL yet (or we loaded it | |
1080 | * before it was assigned) -- in this case it may | |
1081 | * now be NULL which means we should just let the | |
1082 | * packet pass through because splicing the frames | |
1083 | * back is already done. | |
1084 | */ | |
40b275b6 | 1085 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1086 | |
1087 | if (!tid_tx) { | |
1088 | /* do nothing, let packet pass through */ | |
1089 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1090 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1091 | reset_agg_timer = true; |
a622ab72 JB |
1092 | } else { |
1093 | queued = true; | |
1094 | info->control.vif = &tx->sdata->vif; | |
1095 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1096 | __skb_queue_tail(&tid_tx->pending, skb); | |
aa454580 HS |
1097 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1098 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1099 | } |
1100 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1101 | |
1102 | if (purge_skb) | |
1103 | dev_kfree_skb(purge_skb); | |
a622ab72 JB |
1104 | } |
1105 | ||
285fa695 NM |
1106 | /* reset session timer */ |
1107 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1108 | tid_tx->last_tx = jiffies; |
285fa695 | 1109 | |
a622ab72 JB |
1110 | return queued; |
1111 | } | |
1112 | ||
58d4185e JB |
1113 | /* |
1114 | * initialises @tx | |
1115 | */ | |
9ae54c84 | 1116 | static ieee80211_tx_result |
3b8d81e0 JB |
1117 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1118 | struct ieee80211_tx_data *tx, | |
1119 | struct sk_buff *skb) | |
e2ebc74d | 1120 | { |
3b8d81e0 | 1121 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1122 | struct ieee80211_hdr *hdr; |
e039fa4a | 1123 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1124 | int tid; |
a622ab72 | 1125 | u8 *qc; |
e2ebc74d JB |
1126 | |
1127 | memset(tx, 0, sizeof(*tx)); | |
1128 | tx->skb = skb; | |
e2ebc74d | 1129 | tx->local = local; |
3b8d81e0 | 1130 | tx->sdata = sdata; |
e039fa4a | 1131 | tx->channel = local->hw.conf.channel; |
252b86c4 | 1132 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1133 | |
cd8ffc80 JB |
1134 | /* |
1135 | * If this flag is set to true anywhere, and we get here, | |
1136 | * we are doing the needed processing, so remove the flag | |
1137 | * now. | |
1138 | */ | |
1139 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1140 | ||
58d4185e JB |
1141 | hdr = (struct ieee80211_hdr *) skb->data; |
1142 | ||
3f0e0b22 | 1143 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1144 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1145 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1146 | return TX_DROP; | |
66f2c99a FF |
1147 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED || |
1148 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
b4d57adb | 1149 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1150 | } |
f14543ee | 1151 | if (!tx->sta) |
abe60632 | 1152 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1153 | |
cd8ffc80 | 1154 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1155 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1156 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1157 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1158 | struct tid_ampdu_tx *tid_tx; |
1159 | ||
8b30b1fe S |
1160 | qc = ieee80211_get_qos_ctl(hdr); |
1161 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1162 | ||
a622ab72 JB |
1163 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1164 | if (tid_tx) { | |
1165 | bool queued; | |
cd8ffc80 | 1166 | |
a622ab72 JB |
1167 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1168 | tid_tx, tid); | |
1169 | ||
1170 | if (unlikely(queued)) | |
1171 | return TX_QUEUED; | |
1172 | } | |
8b30b1fe S |
1173 | } |
1174 | ||
badffb72 | 1175 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1176 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1177 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1178 | } else |
5cf121c3 | 1179 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1180 | |
a26eb27a JB |
1181 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1182 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1183 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1184 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1185 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1186 | } |
1187 | ||
e2ebc74d | 1188 | if (!tx->sta) |
e039fa4a | 1189 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1190 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1191 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1192 | |
e039fa4a | 1193 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1194 | |
9ae54c84 | 1195 | return TX_CONTINUE; |
e2ebc74d JB |
1196 | } |
1197 | ||
11127e91 JB |
1198 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1199 | struct ieee80211_vif *vif, | |
1200 | struct ieee80211_sta *sta, | |
1201 | struct sk_buff_head *skbs, | |
1202 | bool txpending) | |
e2ebc74d | 1203 | { |
252b86c4 | 1204 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1205 | unsigned long flags; |
e2ebc74d | 1206 | |
252b86c4 | 1207 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1208 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1209 | int q = info->hw_queue; | |
1210 | ||
1211 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1212 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1213 | __skb_unlink(skb, skbs); | |
1214 | dev_kfree_skb(skb); | |
1215 | continue; | |
1216 | } | |
1217 | #endif | |
3b8d81e0 JB |
1218 | |
1219 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1220 | if (local->queue_stop_reasons[q] || |
7bb45683 JB |
1221 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
1222 | /* | |
1223 | * Since queue is stopped, queue up frames for later | |
1224 | * transmission from the tx-pending tasklet when the | |
1225 | * queue is woken again. | |
1226 | */ | |
252b86c4 | 1227 | if (txpending) |
4db4e0a1 | 1228 | skb_queue_splice_init(skbs, &local->pending[q]); |
252b86c4 | 1229 | else |
4db4e0a1 JB |
1230 | skb_queue_splice_tail_init(skbs, |
1231 | &local->pending[q]); | |
7bb45683 JB |
1232 | |
1233 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1234 | flags); | |
1235 | return false; | |
1236 | } | |
3b8d81e0 | 1237 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1238 | |
11127e91 JB |
1239 | info->control.vif = vif; |
1240 | info->control.sta = sta; | |
f0e72851 | 1241 | |
11127e91 JB |
1242 | __skb_unlink(skb, skbs); |
1243 | drv_tx(local, skb); | |
1244 | } | |
5061b0c2 | 1245 | |
11127e91 JB |
1246 | return true; |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1251 | */ | |
1252 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1253 | struct sk_buff_head *skbs, int led_len, | |
1254 | struct sta_info *sta, bool txpending) | |
1255 | { | |
1256 | struct ieee80211_tx_info *info; | |
1257 | struct ieee80211_sub_if_data *sdata; | |
1258 | struct ieee80211_vif *vif; | |
1259 | struct ieee80211_sta *pubsta; | |
1260 | struct sk_buff *skb; | |
1261 | bool result = true; | |
1262 | __le16 fc; | |
5061b0c2 | 1263 | |
11127e91 JB |
1264 | if (WARN_ON(skb_queue_empty(skbs))) |
1265 | return true; | |
ec25acc4 | 1266 | |
11127e91 JB |
1267 | skb = skb_peek(skbs); |
1268 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1269 | info = IEEE80211_SKB_CB(skb); | |
1270 | sdata = vif_to_sdata(info->control.vif); | |
1271 | if (sta && !sta->uploaded) | |
1272 | sta = NULL; | |
1273 | ||
1274 | if (sta) | |
1275 | pubsta = &sta->sta; | |
1276 | else | |
1277 | pubsta = NULL; | |
1278 | ||
1279 | switch (sdata->vif.type) { | |
1280 | case NL80211_IFTYPE_MONITOR: | |
4b6f1dd6 | 1281 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1282 | if (sdata) { |
4b6f1dd6 | 1283 | vif = &sdata->vif; |
3a25a8c8 JB |
1284 | info->hw_queue = |
1285 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1286 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1287 | dev_kfree_skb(skb); | |
1288 | return true; | |
1289 | } else | |
4b6f1dd6 | 1290 | vif = NULL; |
11127e91 JB |
1291 | break; |
1292 | case NL80211_IFTYPE_AP_VLAN: | |
1293 | sdata = container_of(sdata->bss, | |
1294 | struct ieee80211_sub_if_data, u.ap); | |
1295 | /* fall through */ | |
1296 | default: | |
1297 | vif = &sdata->vif; | |
1298 | break; | |
e2ebc74d | 1299 | } |
2de8e0d9 | 1300 | |
cb831b53 JB |
1301 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1302 | txpending); | |
11127e91 | 1303 | |
74e4dbfd JB |
1304 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
1305 | ieee80211_led_tx(local, 1); | |
1306 | ||
4db4e0a1 | 1307 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1308 | |
11127e91 | 1309 | return result; |
e2ebc74d JB |
1310 | } |
1311 | ||
97b045d6 JB |
1312 | /* |
1313 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1314 | * frame was dropped or queued. | |
1315 | */ | |
1316 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1317 | { | |
252b86c4 | 1318 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1319 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1320 | |
9aa4aee3 JB |
1321 | #define CALL_TXH(txh) \ |
1322 | do { \ | |
1323 | res = txh(tx); \ | |
1324 | if (res != TX_CONTINUE) \ | |
1325 | goto txh_done; \ | |
1326 | } while (0) | |
1327 | ||
5c1b98a5 | 1328 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1329 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1330 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1331 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1332 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1333 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1334 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1335 | |
aa5b5492 JB |
1336 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1337 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1338 | tx->skb = NULL; | |
c6fcf6bc | 1339 | goto txh_done; |
aa5b5492 | 1340 | } |
c6fcf6bc JB |
1341 | |
1342 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1343 | CALL_TXH(ieee80211_tx_h_sequence); |
1344 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1345 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1346 | CALL_TXH(ieee80211_tx_h_stats); |
1347 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1348 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1349 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1350 | #undef CALL_TXH |
97b045d6 | 1351 | |
d9e8a70f | 1352 | txh_done: |
97b045d6 | 1353 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1354 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 JB |
1355 | if (tx->skb) |
1356 | dev_kfree_skb(tx->skb); | |
1357 | else | |
1358 | __skb_queue_purge(&tx->skbs); | |
97b045d6 JB |
1359 | return -1; |
1360 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1361 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1362 | return -1; |
1363 | } | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
7bb45683 JB |
1368 | /* |
1369 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1370 | */ | |
1371 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
3b8d81e0 | 1372 | struct sk_buff *skb, bool txpending) |
e2ebc74d | 1373 | { |
3b8d81e0 | 1374 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1375 | struct ieee80211_tx_data tx; |
97b045d6 | 1376 | ieee80211_tx_result res_prepare; |
e039fa4a | 1377 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1378 | bool result = true; |
74e4dbfd | 1379 | int led_len; |
e2ebc74d | 1380 | |
e2ebc74d JB |
1381 | if (unlikely(skb->len < 10)) { |
1382 | dev_kfree_skb(skb); | |
7bb45683 | 1383 | return true; |
e2ebc74d JB |
1384 | } |
1385 | ||
d0709a65 JB |
1386 | rcu_read_lock(); |
1387 | ||
58d4185e | 1388 | /* initialises tx */ |
74e4dbfd | 1389 | led_len = skb->len; |
3b8d81e0 | 1390 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1391 | |
cd8ffc80 | 1392 | if (unlikely(res_prepare == TX_DROP)) { |
e2ebc74d | 1393 | dev_kfree_skb(skb); |
7bb45683 | 1394 | goto out; |
cd8ffc80 | 1395 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
7bb45683 | 1396 | goto out; |
e2ebc74d JB |
1397 | } |
1398 | ||
5cf121c3 | 1399 | tx.channel = local->hw.conf.channel; |
e039fa4a | 1400 | info->band = tx.channel->band; |
e2ebc74d | 1401 | |
3a25a8c8 JB |
1402 | /* set up hw_queue value early */ |
1403 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1404 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1405 | info->hw_queue = | |
1406 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1407 | ||
7bb45683 | 1408 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1409 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1410 | tx.sta, txpending); | |
97b045d6 | 1411 | out: |
d4e46a3d | 1412 | rcu_read_unlock(); |
7bb45683 | 1413 | return result; |
e2ebc74d JB |
1414 | } |
1415 | ||
1416 | /* device xmit handlers */ | |
1417 | ||
3bff1865 | 1418 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1419 | struct sk_buff *skb, |
1420 | int head_need, bool may_encrypt) | |
1421 | { | |
3bff1865 | 1422 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1423 | int tail_need = 0; |
1424 | ||
3bff1865 | 1425 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1426 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1427 | tail_need -= skb_tailroom(skb); | |
1428 | tail_need = max_t(int, tail_need, 0); | |
1429 | } | |
1430 | ||
fc7c976d | 1431 | if (skb_cloned(skb)) |
23c0752a | 1432 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1433 | else if (head_need || tail_need) |
23c0752a | 1434 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1435 | else |
1436 | return 0; | |
23c0752a JB |
1437 | |
1438 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1439 | wiphy_debug(local->hw.wiphy, |
1440 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1441 | return -ENOMEM; |
1442 | } | |
1443 | ||
23c0752a JB |
1444 | return 0; |
1445 | } | |
1446 | ||
ce662b44 | 1447 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
e2ebc74d | 1448 | { |
3b8d81e0 | 1449 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1450 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1451 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1452 | int headroom; |
23c0752a | 1453 | bool may_encrypt; |
e2ebc74d | 1454 | |
d84f3234 JB |
1455 | rcu_read_lock(); |
1456 | ||
3b8d81e0 | 1457 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1458 | |
3b8d81e0 | 1459 | headroom = local->tx_headroom; |
23c0752a JB |
1460 | if (may_encrypt) |
1461 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1462 | headroom -= skb_headroom(skb); | |
1463 | headroom = max_t(int, 0, headroom); | |
1464 | ||
3bff1865 | 1465 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
23c0752a | 1466 | dev_kfree_skb(skb); |
d84f3234 | 1467 | rcu_read_unlock(); |
3b8d81e0 | 1468 | return; |
e2ebc74d JB |
1469 | } |
1470 | ||
740c1aa3 | 1471 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1472 | info->control.vif = &sdata->vif; |
e2ebc74d | 1473 | |
cca89496 JC |
1474 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1475 | ieee80211_is_data(hdr->frame_control) && | |
98aed9fd JB |
1476 | !is_multicast_ether_addr(hdr->addr1) && |
1477 | mesh_nexthop_resolve(skb, sdata)) { | |
1478 | /* skb queued: don't free */ | |
1479 | rcu_read_unlock(); | |
1480 | return; | |
1481 | } | |
cca89496 | 1482 | |
2154c81c | 1483 | ieee80211_set_qos_hdr(sdata, skb); |
3b8d81e0 | 1484 | ieee80211_tx(sdata, skb, false); |
d84f3234 | 1485 | rcu_read_unlock(); |
e2ebc74d JB |
1486 | } |
1487 | ||
73b9f03a JB |
1488 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1489 | { | |
1490 | struct ieee80211_radiotap_iterator iterator; | |
1491 | struct ieee80211_radiotap_header *rthdr = | |
1492 | (struct ieee80211_radiotap_header *) skb->data; | |
1493 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1494 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1495 | NULL); | |
1496 | u16 txflags; | |
1497 | ||
1498 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1499 | IEEE80211_TX_CTL_DONTFRAG; | |
1500 | ||
1501 | /* | |
1502 | * for every radiotap entry that is present | |
1503 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1504 | * entries present, or -EINVAL on error) | |
1505 | */ | |
1506 | ||
1507 | while (!ret) { | |
1508 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1509 | ||
1510 | if (ret) | |
1511 | continue; | |
1512 | ||
1513 | /* see if this argument is something we can use */ | |
1514 | switch (iterator.this_arg_index) { | |
1515 | /* | |
1516 | * You must take care when dereferencing iterator.this_arg | |
1517 | * for multibyte types... the pointer is not aligned. Use | |
1518 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1519 | * iterator.this_arg for type "type" safely on all arches. | |
1520 | */ | |
1521 | case IEEE80211_RADIOTAP_FLAGS: | |
1522 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1523 | /* | |
1524 | * this indicates that the skb we have been | |
1525 | * handed has the 32-bit FCS CRC at the end... | |
1526 | * we should react to that by snipping it off | |
1527 | * because it will be recomputed and added | |
1528 | * on transmission | |
1529 | */ | |
1530 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1531 | return false; | |
1532 | ||
1533 | skb_trim(skb, skb->len - FCS_LEN); | |
1534 | } | |
1535 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1536 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1537 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1538 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1539 | break; | |
1540 | ||
1541 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1542 | txflags = get_unaligned_le16(iterator.this_arg); | |
1543 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1544 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1545 | break; | |
1546 | ||
1547 | /* | |
1548 | * Please update the file | |
1549 | * Documentation/networking/mac80211-injection.txt | |
1550 | * when parsing new fields here. | |
1551 | */ | |
1552 | ||
1553 | default: | |
1554 | break; | |
1555 | } | |
1556 | } | |
1557 | ||
1558 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1559 | return false; | |
1560 | ||
1561 | /* | |
1562 | * remove the radiotap header | |
1563 | * iterator->_max_length was sanity-checked against | |
1564 | * skb->len by iterator init | |
1565 | */ | |
1566 | skb_pull(skb, iterator._max_length); | |
1567 | ||
1568 | return true; | |
1569 | } | |
1570 | ||
d0cf9c0d SH |
1571 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1572 | struct net_device *dev) | |
e2ebc74d JB |
1573 | { |
1574 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
47f4d887 | 1575 | struct ieee80211_channel *chan = local->hw.conf.channel; |
e2ebc74d JB |
1576 | struct ieee80211_radiotap_header *prthdr = |
1577 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1578 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1579 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1580 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
9b8a74e3 | 1581 | u16 len_rthdr; |
5d9cf4a5 | 1582 | int hdrlen; |
e2ebc74d | 1583 | |
47f4d887 LR |
1584 | /* |
1585 | * Frame injection is not allowed if beaconing is not allowed | |
1586 | * or if we need radar detection. Beaconing is usually not allowed when | |
1587 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1588 | * Passive scan is also used in world regulatory domains where | |
1589 | * your country is not known and as such it should be treated as | |
1590 | * NO TX unless the channel is explicitly allowed in which case | |
1591 | * your current regulatory domain would not have the passive scan | |
1592 | * flag. | |
1593 | * | |
1594 | * Since AP mode uses monitor interfaces to inject/TX management | |
1595 | * frames we can make AP mode the exception to this rule once it | |
1596 | * supports radar detection as its implementation can deal with | |
1597 | * radar detection by itself. We can do that later by adding a | |
1598 | * monitor flag interfaces used for AP support. | |
1599 | */ | |
1600 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1601 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1602 | goto fail; | |
1603 | ||
9b8a74e3 AG |
1604 | /* check for not even having the fixed radiotap header part */ |
1605 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1606 | goto fail; /* too short to be possibly valid */ | |
1607 | ||
1608 | /* is it a header version we can trust to find length from? */ | |
1609 | if (unlikely(prthdr->it_version)) | |
1610 | goto fail; /* only version 0 is supported */ | |
1611 | ||
1612 | /* then there must be a radiotap header with a length we can use */ | |
1613 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1614 | ||
1615 | /* does the skb contain enough to deliver on the alleged length? */ | |
1616 | if (unlikely(skb->len < len_rthdr)) | |
1617 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1618 | |
e2ebc74d JB |
1619 | /* |
1620 | * fix up the pointers accounting for the radiotap | |
1621 | * header still being in there. We are being given | |
1622 | * a precooked IEEE80211 header so no need for | |
1623 | * normal processing | |
1624 | */ | |
9b8a74e3 | 1625 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1626 | /* |
9b8a74e3 AG |
1627 | * these are just fixed to the end of the rt area since we |
1628 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1629 | */ |
9b8a74e3 AG |
1630 | skb_set_network_header(skb, len_rthdr); |
1631 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1632 | |
5d9cf4a5 JB |
1633 | if (skb->len < len_rthdr + 2) |
1634 | goto fail; | |
1635 | ||
1636 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1637 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1638 | ||
1639 | if (skb->len < len_rthdr + hdrlen) | |
1640 | goto fail; | |
1641 | ||
f75f5c6f HS |
1642 | /* |
1643 | * Initialize skb->protocol if the injected frame is a data frame | |
1644 | * carrying a rfc1042 header | |
1645 | */ | |
5d9cf4a5 JB |
1646 | if (ieee80211_is_data(hdr->frame_control) && |
1647 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1648 | u8 *payload = (u8 *)hdr + hdrlen; | |
1649 | ||
b203ca39 | 1650 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1651 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1652 | payload[7]); | |
f75f5c6f HS |
1653 | } |
1654 | ||
3b8d81e0 JB |
1655 | memset(info, 0, sizeof(*info)); |
1656 | ||
5d9cf4a5 | 1657 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1658 | IEEE80211_TX_CTL_INJECTED; |
1659 | ||
1660 | /* process and remove the injection radiotap header */ | |
1661 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1662 | goto fail; | |
5d9cf4a5 JB |
1663 | |
1664 | rcu_read_lock(); | |
1665 | ||
1666 | /* | |
1667 | * We process outgoing injected frames that have a local address | |
1668 | * we handle as though they are non-injected frames. | |
1669 | * This code here isn't entirely correct, the local MAC address | |
1670 | * isn't always enough to find the interface to use; for proper | |
1671 | * VLAN/WDS support we will need a different mechanism (which | |
1672 | * likely isn't going to be monitor interfaces). | |
1673 | */ | |
1674 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1675 | ||
1676 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1677 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1678 | continue; | |
1679 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1680 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1681 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1682 | continue; | |
b203ca39 | 1683 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1684 | sdata = tmp_sdata; |
1685 | break; | |
1686 | } | |
1687 | } | |
7351c6bd | 1688 | |
5d9cf4a5 JB |
1689 | ieee80211_xmit(sdata, skb); |
1690 | rcu_read_unlock(); | |
1691 | ||
e2ebc74d | 1692 | return NETDEV_TX_OK; |
9b8a74e3 AG |
1693 | |
1694 | fail: | |
1695 | dev_kfree_skb(skb); | |
1696 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1697 | } |
1698 | ||
1699 | /** | |
1700 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1701 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1702 | * @skb: packet to be sent | |
1703 | * @dev: incoming interface | |
1704 | * | |
1705 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1706 | * not be freed, and caller is responsible for either retrying later or freeing | |
1707 | * skb). | |
1708 | * | |
1709 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1710 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1711 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1712 | * transmission (through low-level driver). | |
1713 | */ | |
d0cf9c0d SH |
1714 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1715 | struct net_device *dev) | |
e2ebc74d | 1716 | { |
133b8226 JB |
1717 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1718 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1719 | struct ieee80211_tx_info *info; |
5b548140 | 1720 | int ret = NETDEV_TX_BUSY, head_need; |
065e9605 HH |
1721 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1722 | __le16 fc; | |
e2ebc74d | 1723 | struct ieee80211_hdr hdr; |
ff67bb86 | 1724 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1725 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1726 | const u8 *encaps_data; |
1727 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1728 | int nh_pos, h_pos; |
f14543ee | 1729 | struct sta_info *sta = NULL; |
c2c98fde | 1730 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1731 | bool tdls_direct = false; |
a729cff8 JB |
1732 | bool multicast; |
1733 | u32 info_flags = 0; | |
1734 | u16 info_id = 0; | |
e2ebc74d | 1735 | |
e2ebc74d | 1736 | if (unlikely(skb->len < ETH_HLEN)) { |
ec634fe3 | 1737 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1738 | goto fail; |
1739 | } | |
1740 | ||
e2ebc74d JB |
1741 | /* convert Ethernet header to proper 802.11 header (based on |
1742 | * operation mode) */ | |
1743 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1744 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1745 | |
51fb61e7 | 1746 | switch (sdata->vif.type) { |
05c914fe | 1747 | case NL80211_IFTYPE_AP_VLAN: |
f14543ee | 1748 | rcu_read_lock(); |
9bc383de | 1749 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1750 | if (sta) { |
1751 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1752 | /* RA TA DA SA */ | |
1753 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1754 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1755 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1756 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1757 | hdrlen = 30; | |
c2c98fde JB |
1758 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1759 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee FF |
1760 | } |
1761 | rcu_read_unlock(); | |
1762 | if (sta) | |
1763 | break; | |
1764 | /* fall through */ | |
1765 | case NL80211_IFTYPE_AP: | |
065e9605 | 1766 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1767 | /* DA BSSID SA */ |
1768 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1769 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1770 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1771 | hdrlen = 24; | |
cf966838 | 1772 | break; |
05c914fe | 1773 | case NL80211_IFTYPE_WDS: |
065e9605 | 1774 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1775 | /* RA TA DA SA */ |
1776 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1777 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1778 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1779 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1780 | hdrlen = 30; | |
cf966838 | 1781 | break; |
33b64eb2 | 1782 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1783 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1784 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1785 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1786 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
ec634fe3 | 1787 | ret = NETDEV_TX_OK; |
e32f85f7 | 1788 | goto fail; |
33b64eb2 | 1789 | } |
28104cae | 1790 | rcu_read_lock(); |
b8bacc18 CYY |
1791 | if (!is_multicast_ether_addr(skb->data)) { |
1792 | mpath = mesh_path_lookup(skb->data, sdata); | |
1793 | if (!mpath) | |
1794 | mppath = mpp_path_lookup(skb->data, sdata); | |
1795 | } | |
79617dee | 1796 | |
f76b57b4 | 1797 | /* |
9d52501b JF |
1798 | * Use address extension if it is a packet from |
1799 | * another interface or if we know the destination | |
1800 | * is being proxied by a portal (i.e. portal address | |
1801 | * differs from proxied address) | |
f76b57b4 | 1802 | */ |
b203ca39 JP |
1803 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1804 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1805 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1806 | skb->data, skb->data + ETH_ALEN); | |
28104cae | 1807 | rcu_read_unlock(); |
3c5772a5 | 1808 | meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, |
61ad5394 | 1809 | sdata, NULL, NULL); |
79617dee | 1810 | } else { |
3c5772a5 | 1811 | int is_mesh_mcast = 1; |
15ff6365 | 1812 | const u8 *mesh_da; |
79617dee | 1813 | |
79617dee | 1814 | if (is_multicast_ether_addr(skb->data)) |
3c5772a5 JC |
1815 | /* DA TA mSA AE:SA */ |
1816 | mesh_da = skb->data; | |
79617dee | 1817 | else { |
15ff6365 JB |
1818 | static const u8 bcast[ETH_ALEN] = |
1819 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
3c5772a5 JC |
1820 | if (mppath) { |
1821 | /* RA TA mDA mSA AE:DA SA */ | |
1822 | mesh_da = mppath->mpp; | |
1823 | is_mesh_mcast = 0; | |
15ff6365 | 1824 | } else { |
3c5772a5 | 1825 | /* DA TA mSA AE:SA */ |
15ff6365 JB |
1826 | mesh_da = bcast; |
1827 | } | |
79617dee | 1828 | } |
3c5772a5 | 1829 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1830 | mesh_da, sdata->vif.addr); |
3c5772a5 JC |
1831 | rcu_read_unlock(); |
1832 | if (is_mesh_mcast) | |
1833 | meshhdrlen = | |
1834 | ieee80211_new_mesh_header(&mesh_hdr, | |
1835 | sdata, | |
1836 | skb->data + ETH_ALEN, | |
3c5772a5 JC |
1837 | NULL); |
1838 | else | |
1839 | meshhdrlen = | |
1840 | ieee80211_new_mesh_header(&mesh_hdr, | |
1841 | sdata, | |
3c5772a5 JC |
1842 | skb->data, |
1843 | skb->data + ETH_ALEN); | |
79617dee | 1844 | |
79617dee | 1845 | } |
33b64eb2 LCC |
1846 | break; |
1847 | #endif | |
05c914fe | 1848 | case NL80211_IFTYPE_STATION: |
941c93cd | 1849 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1850 | bool tdls_peer = false; |
1851 | ||
941c93cd AN |
1852 | rcu_read_lock(); |
1853 | sta = sta_info_get(sdata, skb->data); | |
c2c98fde JB |
1854 | if (sta) { |
1855 | authorized = test_sta_flag(sta, | |
1856 | WLAN_STA_AUTHORIZED); | |
1857 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1858 | tdls_peer = test_sta_flag(sta, | |
1859 | WLAN_STA_TDLS_PEER); | |
1860 | tdls_auth = test_sta_flag(sta, | |
1861 | WLAN_STA_TDLS_PEER_AUTH); | |
1862 | } | |
941c93cd AN |
1863 | rcu_read_unlock(); |
1864 | ||
1865 | /* | |
1866 | * If the TDLS link is enabled, send everything | |
1867 | * directly. Otherwise, allow TDLS setup frames | |
1868 | * to be transmitted indirectly. | |
1869 | */ | |
c2c98fde | 1870 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1871 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1872 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1873 | } | |
1874 | ||
1875 | if (tdls_direct) { | |
1876 | /* link during setup - throw out frames to peer */ | |
c2c98fde | 1877 | if (!tdls_auth) { |
941c93cd AN |
1878 | ret = NETDEV_TX_OK; |
1879 | goto fail; | |
1880 | } | |
1881 | ||
1882 | /* DA SA BSSID */ | |
1883 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1884 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1885 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1886 | hdrlen = 24; | |
1887 | } else if (sdata->u.mgd.use_4addr && | |
1888 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1889 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1890 | IEEE80211_FCTL_TODS); | |
f14543ee | 1891 | /* RA TA DA SA */ |
941c93cd | 1892 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1893 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1894 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1895 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1896 | hdrlen = 30; | |
1897 | } else { | |
1898 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1899 | /* BSSID SA DA */ | |
941c93cd | 1900 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
1901 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
1902 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1903 | hdrlen = 24; | |
1904 | } | |
cf966838 | 1905 | break; |
05c914fe | 1906 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1907 | /* DA SA BSSID */ |
1908 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1909 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1910 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1911 | hdrlen = 24; |
cf966838 JB |
1912 | break; |
1913 | default: | |
ec634fe3 | 1914 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1915 | goto fail; |
1916 | } | |
1917 | ||
7d185b8b JB |
1918 | /* |
1919 | * There's no need to try to look up the destination | |
1920 | * if it is a multicast address (which can only happen | |
1921 | * in AP mode) | |
1922 | */ | |
a729cff8 JB |
1923 | multicast = is_multicast_ether_addr(hdr.addr1); |
1924 | if (!multicast) { | |
d0709a65 | 1925 | rcu_read_lock(); |
abe60632 | 1926 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
1927 | if (sta) { |
1928 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
1929 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1930 | } | |
d0709a65 | 1931 | rcu_read_unlock(); |
e2ebc74d JB |
1932 | } |
1933 | ||
4777be41 JC |
1934 | /* For mesh, the use of the QoS header is mandatory */ |
1935 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 1936 | wme_sta = true; |
4777be41 | 1937 | |
3434fbd3 | 1938 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 1939 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 1940 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
1941 | hdrlen += 2; |
1942 | } | |
1943 | ||
1944 | /* | |
238814fd JB |
1945 | * Drop unicast frames to unauthorised stations unless they are |
1946 | * EAPOL frames from the local station. | |
ce3edf6d | 1947 | */ |
55182e4a JB |
1948 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
1949 | !is_multicast_ether_addr(hdr.addr1) && !authorized && | |
1950 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || | |
b203ca39 | 1951 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 1952 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 1953 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 1954 | dev->name, hdr.addr1); |
ce3edf6d JB |
1955 | #endif |
1956 | ||
1957 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
1958 | ||
ec634fe3 | 1959 | ret = NETDEV_TX_OK; |
ce3edf6d JB |
1960 | goto fail; |
1961 | } | |
1962 | ||
a729cff8 JB |
1963 | if (unlikely(!multicast && skb->sk && |
1964 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
1965 | struct sk_buff *orig_skb = skb; | |
1966 | ||
1967 | skb = skb_clone(skb, GFP_ATOMIC); | |
1968 | if (skb) { | |
1969 | unsigned long flags; | |
1970 | int id, r; | |
1971 | ||
1972 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
1973 | r = idr_get_new_above(&local->ack_status_frames, | |
1974 | orig_skb, 1, &id); | |
1975 | if (r == -EAGAIN) { | |
1976 | idr_pre_get(&local->ack_status_frames, | |
1977 | GFP_ATOMIC); | |
1978 | r = idr_get_new_above(&local->ack_status_frames, | |
1979 | orig_skb, 1, &id); | |
1980 | } | |
1981 | if (WARN_ON(!id) || id > 0xffff) { | |
1982 | idr_remove(&local->ack_status_frames, id); | |
1983 | r = -ERANGE; | |
1984 | } | |
1985 | spin_unlock_irqrestore(&local->ack_status_lock, flags); | |
1986 | ||
1987 | if (!r) { | |
1988 | info_id = id; | |
1989 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1990 | } else if (skb_shared(skb)) { | |
1991 | kfree_skb(orig_skb); | |
1992 | } else { | |
1993 | kfree_skb(skb); | |
1994 | skb = orig_skb; | |
1995 | } | |
1996 | } else { | |
1997 | /* couldn't clone -- lose tx status ... */ | |
1998 | skb = orig_skb; | |
1999 | } | |
2000 | } | |
2001 | ||
7e244707 HS |
2002 | /* |
2003 | * If the skb is shared we need to obtain our own copy. | |
2004 | */ | |
2005 | if (skb_shared(skb)) { | |
a729cff8 JB |
2006 | struct sk_buff *tmp_skb = skb; |
2007 | ||
2008 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2009 | WARN_ON(info_id); | |
2010 | ||
f8a0a781 | 2011 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2012 | kfree_skb(tmp_skb); |
2013 | ||
2014 | if (!skb) { | |
2015 | ret = NETDEV_TX_OK; | |
2016 | goto fail; | |
2017 | } | |
2018 | } | |
2019 | ||
065e9605 | 2020 | hdr.frame_control = fc; |
e2ebc74d JB |
2021 | hdr.duration_id = 0; |
2022 | hdr.seq_ctrl = 0; | |
2023 | ||
2024 | skip_header_bytes = ETH_HLEN; | |
2025 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2026 | encaps_data = bridge_tunnel_header; | |
2027 | encaps_len = sizeof(bridge_tunnel_header); | |
2028 | skip_header_bytes -= 2; | |
2029 | } else if (ethertype >= 0x600) { | |
2030 | encaps_data = rfc1042_header; | |
2031 | encaps_len = sizeof(rfc1042_header); | |
2032 | skip_header_bytes -= 2; | |
2033 | } else { | |
2034 | encaps_data = NULL; | |
2035 | encaps_len = 0; | |
2036 | } | |
2037 | ||
7e244707 HS |
2038 | nh_pos = skb_network_header(skb) - skb->data; |
2039 | h_pos = skb_transport_header(skb) - skb->data; | |
2040 | ||
e2ebc74d JB |
2041 | skb_pull(skb, skip_header_bytes); |
2042 | nh_pos -= skip_header_bytes; | |
2043 | h_pos -= skip_header_bytes; | |
2044 | ||
23c0752a | 2045 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2046 | |
23c0752a JB |
2047 | /* |
2048 | * So we need to modify the skb header and hence need a copy of | |
2049 | * that. The head_need variable above doesn't, so far, include | |
2050 | * the needed header space that we don't need right away. If we | |
2051 | * can, then we don't reallocate right now but only after the | |
2052 | * frame arrives at the master device (if it does...) | |
2053 | * | |
2054 | * If we cannot, however, then we will reallocate to include all | |
2055 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2056 | * make it big enough for everything we may ever need. | |
2057 | */ | |
e2ebc74d | 2058 | |
3a5be7d4 | 2059 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
2060 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
2061 | head_need += local->tx_headroom; | |
2062 | head_need = max_t(int, 0, head_need); | |
3bff1865 | 2063 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) |
e2ebc74d | 2064 | goto fail; |
e2ebc74d JB |
2065 | } |
2066 | ||
2067 | if (encaps_data) { | |
2068 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2069 | nh_pos += encaps_len; | |
2070 | h_pos += encaps_len; | |
2071 | } | |
c29b9b9b | 2072 | |
e4ab7eb0 | 2073 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2074 | if (meshhdrlen > 0) { |
2075 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2076 | nh_pos += meshhdrlen; | |
2077 | h_pos += meshhdrlen; | |
2078 | } | |
e4ab7eb0 | 2079 | #endif |
33b64eb2 | 2080 | |
065e9605 | 2081 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2082 | __le16 *qos_control; |
2083 | ||
2084 | qos_control = (__le16*) skb_push(skb, 2); | |
2085 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
2086 | /* | |
2087 | * Maybe we could actually set some fields here, for now just | |
2088 | * initialise to zero to indicate no special operation. | |
2089 | */ | |
2090 | *qos_control = 0; | |
2091 | } else | |
2092 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2093 | ||
e2ebc74d JB |
2094 | nh_pos += hdrlen; |
2095 | h_pos += hdrlen; | |
2096 | ||
68aae116 SH |
2097 | dev->stats.tx_packets++; |
2098 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2099 | |
2100 | /* Update skb pointers to various headers since this modified frame | |
2101 | * is going to go through Linux networking code that may potentially | |
2102 | * need things like pointer to IP header. */ | |
2103 | skb_set_mac_header(skb, 0); | |
2104 | skb_set_network_header(skb, nh_pos); | |
2105 | skb_set_transport_header(skb, h_pos); | |
2106 | ||
489ee919 | 2107 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2108 | memset(info, 0, sizeof(*info)); |
2109 | ||
e2ebc74d | 2110 | dev->trans_start = jiffies; |
a729cff8 JB |
2111 | |
2112 | info->flags = info_flags; | |
2113 | info->ack_frame_id = info_id; | |
2114 | ||
3b8d81e0 | 2115 | ieee80211_xmit(sdata, skb); |
e2ebc74d | 2116 | |
ec634fe3 | 2117 | return NETDEV_TX_OK; |
e2ebc74d JB |
2118 | |
2119 | fail: | |
ec634fe3 | 2120 | if (ret == NETDEV_TX_OK) |
e2ebc74d JB |
2121 | dev_kfree_skb(skb); |
2122 | ||
2123 | return ret; | |
2124 | } | |
2125 | ||
e2ebc74d | 2126 | |
e2530083 JB |
2127 | /* |
2128 | * ieee80211_clear_tx_pending may not be called in a context where | |
2129 | * it is possible that it packets could come in again. | |
2130 | */ | |
e2ebc74d JB |
2131 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2132 | { | |
2de8e0d9 | 2133 | int i; |
e2ebc74d | 2134 | |
2a577d98 JB |
2135 | for (i = 0; i < local->hw.queues; i++) |
2136 | skb_queue_purge(&local->pending[i]); | |
e2ebc74d JB |
2137 | } |
2138 | ||
7bb45683 JB |
2139 | /* |
2140 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2141 | * which in this case means re-queued -- take as an indication to stop sending | |
2142 | * more pending frames. | |
2143 | */ | |
cd8ffc80 JB |
2144 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2145 | struct sk_buff *skb) | |
2146 | { | |
2147 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2148 | struct ieee80211_sub_if_data *sdata; | |
2149 | struct sta_info *sta; | |
2150 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2151 | bool result; |
cd8ffc80 | 2152 | |
5061b0c2 | 2153 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2154 | |
2155 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
7bb45683 | 2156 | result = ieee80211_tx(sdata, skb, true); |
cd8ffc80 | 2157 | } else { |
252b86c4 JB |
2158 | struct sk_buff_head skbs; |
2159 | ||
2160 | __skb_queue_head_init(&skbs); | |
2161 | __skb_queue_tail(&skbs, skb); | |
2162 | ||
cd8ffc80 | 2163 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2164 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2165 | |
74e4dbfd | 2166 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2167 | } |
2168 | ||
cd8ffc80 JB |
2169 | return result; |
2170 | } | |
2171 | ||
e2530083 | 2172 | /* |
3b8d81e0 | 2173 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2174 | */ |
e2ebc74d JB |
2175 | void ieee80211_tx_pending(unsigned long data) |
2176 | { | |
2177 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2178 | unsigned long flags; |
cd8ffc80 | 2179 | int i; |
3b8d81e0 | 2180 | bool txok; |
e2ebc74d | 2181 | |
f0e72851 | 2182 | rcu_read_lock(); |
e2530083 | 2183 | |
3b8d81e0 | 2184 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2185 | for (i = 0; i < local->hw.queues; i++) { |
2186 | /* | |
2187 | * If queue is stopped by something other than due to pending | |
2188 | * frames, or we have no pending frames, proceed to next queue. | |
2189 | */ | |
3b8d81e0 | 2190 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2191 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2192 | continue; |
e2530083 | 2193 | |
2a577d98 | 2194 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2195 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2196 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2197 | |
a7bc376c JB |
2198 | if (WARN_ON(!info->control.vif)) { |
2199 | kfree_skb(skb); | |
2200 | continue; | |
2201 | } | |
2202 | ||
3b8d81e0 JB |
2203 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2204 | flags); | |
2205 | ||
2206 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2207 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2208 | flags); | |
2209 | if (!txok) | |
2a577d98 | 2210 | break; |
e2ebc74d | 2211 | } |
7236fe29 JB |
2212 | |
2213 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2214 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2215 | } |
3b8d81e0 | 2216 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2217 | |
f0e72851 | 2218 | rcu_read_unlock(); |
e2ebc74d JB |
2219 | } |
2220 | ||
2221 | /* functions for drivers to get certain frames */ | |
2222 | ||
8860020e JB |
2223 | static void ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2224 | struct ieee80211_if_ap *bss, | |
5dfdaf58 JB |
2225 | struct sk_buff *skb, |
2226 | struct beacon_data *beacon) | |
e2ebc74d JB |
2227 | { |
2228 | u8 *pos, *tim; | |
2229 | int aid0 = 0; | |
2230 | int i, have_bits = 0, n1, n2; | |
2231 | ||
2232 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2233 | * mode. */ | |
e2ebc74d JB |
2234 | if (atomic_read(&bss->num_sta_ps) > 0) |
2235 | /* in the hope that this is faster than | |
2236 | * checking byte-for-byte */ | |
2237 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
2238 | IEEE80211_MAX_AID+1); | |
2239 | ||
2240 | if (bss->dtim_count == 0) | |
8860020e | 2241 | bss->dtim_count = sdata->vif.bss_conf.dtim_period - 1; |
e2ebc74d JB |
2242 | else |
2243 | bss->dtim_count--; | |
2244 | ||
2245 | tim = pos = (u8 *) skb_put(skb, 6); | |
2246 | *pos++ = WLAN_EID_TIM; | |
2247 | *pos++ = 4; | |
2248 | *pos++ = bss->dtim_count; | |
8860020e | 2249 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d JB |
2250 | |
2251 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2252 | aid0 = 1; | |
2253 | ||
512119b3 CL |
2254 | bss->dtim_bc_mc = aid0 == 1; |
2255 | ||
e2ebc74d JB |
2256 | if (have_bits) { |
2257 | /* Find largest even number N1 so that bits numbered 1 through | |
2258 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2259 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2260 | n1 = 0; | |
2261 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2262 | if (bss->tim[i]) { | |
2263 | n1 = i & 0xfe; | |
2264 | break; | |
2265 | } | |
2266 | } | |
2267 | n2 = n1; | |
2268 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2269 | if (bss->tim[i]) { | |
2270 | n2 = i; | |
2271 | break; | |
2272 | } | |
2273 | } | |
2274 | ||
2275 | /* Bitmap control */ | |
2276 | *pos++ = n1 | aid0; | |
2277 | /* Part Virt Bitmap */ | |
5220da39 | 2278 | skb_put(skb, n2 - n1); |
e2ebc74d JB |
2279 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); |
2280 | ||
2281 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2282 | } else { |
2283 | *pos++ = aid0; /* Bitmap control */ | |
2284 | *pos++ = 0; /* Part Virt Bitmap */ | |
2285 | } | |
e2ebc74d JB |
2286 | } |
2287 | ||
eddcbb94 JB |
2288 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2289 | struct ieee80211_vif *vif, | |
2290 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2291 | { |
2292 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2293 | struct sk_buff *skb = NULL; |
e039fa4a | 2294 | struct ieee80211_tx_info *info; |
e2ebc74d JB |
2295 | struct ieee80211_sub_if_data *sdata = NULL; |
2296 | struct ieee80211_if_ap *ap = NULL; | |
5dfdaf58 | 2297 | struct beacon_data *beacon; |
8318d78a | 2298 | struct ieee80211_supported_band *sband; |
2e92e6f2 | 2299 | enum ieee80211_band band = local->hw.conf.channel->band; |
e00cfce0 | 2300 | struct ieee80211_tx_rate_control txrc; |
8318d78a | 2301 | |
2e92e6f2 | 2302 | sband = local->hw.wiphy->bands[band]; |
5dfdaf58 JB |
2303 | |
2304 | rcu_read_lock(); | |
e2ebc74d | 2305 | |
32bfd35d | 2306 | sdata = vif_to_sdata(vif); |
e2ebc74d | 2307 | |
eb3e554b FF |
2308 | if (!ieee80211_sdata_running(sdata)) |
2309 | goto out; | |
2310 | ||
eddcbb94 JB |
2311 | if (tim_offset) |
2312 | *tim_offset = 0; | |
2313 | if (tim_length) | |
2314 | *tim_length = 0; | |
2315 | ||
05c914fe | 2316 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
33b64eb2 LCC |
2317 | ap = &sdata->u.ap; |
2318 | beacon = rcu_dereference(ap->beacon); | |
3ad97fbc | 2319 | if (beacon) { |
902acc78 JB |
2320 | /* |
2321 | * headroom, head length, | |
2322 | * tail length and maximum TIM length | |
2323 | */ | |
2324 | skb = dev_alloc_skb(local->tx_headroom + | |
2325 | beacon->head_len + | |
2326 | beacon->tail_len + 256); | |
2327 | if (!skb) | |
2328 | goto out; | |
33b64eb2 | 2329 | |
902acc78 JB |
2330 | skb_reserve(skb, local->tx_headroom); |
2331 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2332 | beacon->head_len); | |
33b64eb2 | 2333 | |
d0709a65 JB |
2334 | /* |
2335 | * Not very nice, but we want to allow the driver to call | |
2336 | * ieee80211_beacon_get() as a response to the set_tim() | |
2337 | * callback. That, however, is already invoked under the | |
2338 | * sta_lock to guarantee consistent and race-free update | |
2339 | * of the tim bitmap in mac80211 and the driver. | |
2340 | */ | |
2341 | if (local->tim_in_locked_section) { | |
8860020e JB |
2342 | ieee80211_beacon_add_tim(sdata, ap, skb, |
2343 | beacon); | |
d0709a65 JB |
2344 | } else { |
2345 | unsigned long flags; | |
2346 | ||
4d33960b | 2347 | spin_lock_irqsave(&local->tim_lock, flags); |
8860020e JB |
2348 | ieee80211_beacon_add_tim(sdata, ap, skb, |
2349 | beacon); | |
4d33960b | 2350 | spin_unlock_irqrestore(&local->tim_lock, flags); |
d0709a65 | 2351 | } |
33b64eb2 | 2352 | |
eddcbb94 JB |
2353 | if (tim_offset) |
2354 | *tim_offset = beacon->head_len; | |
2355 | if (tim_length) | |
2356 | *tim_length = skb->len - beacon->head_len; | |
2357 | ||
902acc78 JB |
2358 | if (beacon->tail) |
2359 | memcpy(skb_put(skb, beacon->tail_len), | |
2360 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2361 | } else |
2362 | goto out; | |
05c914fe | 2363 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2364 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2365 | struct ieee80211_hdr *hdr; |
af8cdcd8 | 2366 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2367 | |
af8cdcd8 | 2368 | if (!presp) |
9d139c81 JB |
2369 | goto out; |
2370 | ||
af8cdcd8 | 2371 | skb = skb_copy(presp, GFP_ATOMIC); |
9d139c81 JB |
2372 | if (!skb) |
2373 | goto out; | |
2374 | ||
2375 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2376 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2377 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2378 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
472dbc45 | 2379 | struct ieee80211_mgmt *mgmt; |
dbf498fb | 2380 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 2381 | u8 *pos; |
3b69a9c5 TP |
2382 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + |
2383 | sizeof(mgmt->u.beacon); | |
472dbc45 | 2384 | |
ac1bd846 JB |
2385 | #ifdef CONFIG_MAC80211_MESH |
2386 | if (!sdata->u.mesh.mesh_id_len) | |
2387 | goto out; | |
2388 | #endif | |
2389 | ||
dbf498fb JC |
2390 | if (ifmsh->sync_ops) |
2391 | ifmsh->sync_ops->adjust_tbtt( | |
2392 | sdata); | |
2393 | ||
3b69a9c5 TP |
2394 | skb = dev_alloc_skb(local->tx_headroom + |
2395 | hdr_len + | |
2396 | 2 + /* NULL SSID */ | |
2397 | 2 + 8 + /* supported rates */ | |
2398 | 2 + 3 + /* DS params */ | |
2399 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
176f3608 | 2400 | 2 + sizeof(struct ieee80211_ht_cap) + |
074d46d1 | 2401 | 2 + sizeof(struct ieee80211_ht_operation) + |
3b69a9c5 TP |
2402 | 2 + sdata->u.mesh.mesh_id_len + |
2403 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
2404 | sdata->u.mesh.ie_len); | |
902acc78 JB |
2405 | if (!skb) |
2406 | goto out; | |
2407 | ||
2408 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3b69a9c5 TP |
2409 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); |
2410 | memset(mgmt, 0, hdr_len); | |
065e9605 HH |
2411 | mgmt->frame_control = |
2412 | cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); | |
902acc78 | 2413 | memset(mgmt->da, 0xff, ETH_ALEN); |
47846c9b JB |
2414 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
2415 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
902acc78 | 2416 | mgmt->u.beacon.beacon_int = |
57c4d7b4 | 2417 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); |
082ebb0c TP |
2418 | mgmt->u.beacon.capab_info |= cpu_to_le16( |
2419 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
902acc78 JB |
2420 | |
2421 | pos = skb_put(skb, 2); | |
2422 | *pos++ = WLAN_EID_SSID; | |
2423 | *pos++ = 0x0; | |
2424 | ||
fc8a7321 | 2425 | if (ieee80211_add_srates_ie(sdata, skb, true) || |
082ebb0c | 2426 | mesh_add_ds_params_ie(skb, sdata) || |
fc8a7321 | 2427 | ieee80211_add_ext_srates_ie(sdata, skb, true) || |
082ebb0c | 2428 | mesh_add_rsn_ie(skb, sdata) || |
176f3608 | 2429 | mesh_add_ht_cap_ie(skb, sdata) || |
074d46d1 | 2430 | mesh_add_ht_oper_ie(skb, sdata) || |
082ebb0c TP |
2431 | mesh_add_meshid_ie(skb, sdata) || |
2432 | mesh_add_meshconf_ie(skb, sdata) || | |
2433 | mesh_add_vendor_ies(skb, sdata)) { | |
2434 | pr_err("o11s: couldn't add ies!\n"); | |
2435 | goto out; | |
2436 | } | |
9d139c81 JB |
2437 | } else { |
2438 | WARN_ON(1); | |
5dfdaf58 | 2439 | goto out; |
e2ebc74d JB |
2440 | } |
2441 | ||
e039fa4a JB |
2442 | info = IEEE80211_SKB_CB(skb); |
2443 | ||
3b8d81e0 | 2444 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2445 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2446 | info->band = band; |
e00cfce0 JM |
2447 | |
2448 | memset(&txrc, 0, sizeof(txrc)); | |
2449 | txrc.hw = hw; | |
2450 | txrc.sband = sband; | |
2451 | txrc.bss_conf = &sdata->vif.bss_conf; | |
2452 | txrc.skb = skb; | |
2453 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
2454 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
2455 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
2456 | txrc.max_rate_idx = -1; | |
2457 | else | |
2458 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
19468413 SW |
2459 | memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band], |
2460 | sizeof(txrc.rate_idx_mcs_mask)); | |
8f0729b1 | 2461 | txrc.bss = true; |
e00cfce0 | 2462 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2463 | |
2464 | info->control.vif = vif; | |
f591fa5d | 2465 | |
a472e71b JL |
2466 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2467 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2468 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2469 | out: |
5dfdaf58 | 2470 | rcu_read_unlock(); |
e2ebc74d JB |
2471 | return skb; |
2472 | } | |
eddcbb94 | 2473 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2474 | |
02945821 AN |
2475 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2476 | struct ieee80211_vif *vif) | |
2477 | { | |
2478 | struct ieee80211_if_ap *ap = NULL; | |
2479 | struct sk_buff *presp = NULL, *skb = NULL; | |
2480 | struct ieee80211_hdr *hdr; | |
2481 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2482 | ||
2483 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2484 | return NULL; | |
2485 | ||
2486 | rcu_read_lock(); | |
2487 | ||
2488 | ap = &sdata->u.ap; | |
2489 | presp = rcu_dereference(ap->probe_resp); | |
2490 | if (!presp) | |
2491 | goto out; | |
2492 | ||
2493 | skb = skb_copy(presp, GFP_ATOMIC); | |
2494 | if (!skb) | |
2495 | goto out; | |
2496 | ||
2497 | hdr = (struct ieee80211_hdr *) skb->data; | |
2498 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2499 | ||
2500 | out: | |
2501 | rcu_read_unlock(); | |
2502 | return skb; | |
2503 | } | |
2504 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2505 | ||
7044cc56 KV |
2506 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2507 | struct ieee80211_vif *vif) | |
2508 | { | |
2509 | struct ieee80211_sub_if_data *sdata; | |
2510 | struct ieee80211_if_managed *ifmgd; | |
2511 | struct ieee80211_pspoll *pspoll; | |
2512 | struct ieee80211_local *local; | |
2513 | struct sk_buff *skb; | |
2514 | ||
2515 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2516 | return NULL; | |
2517 | ||
2518 | sdata = vif_to_sdata(vif); | |
2519 | ifmgd = &sdata->u.mgd; | |
2520 | local = sdata->local; | |
2521 | ||
2522 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2523 | if (!skb) |
7044cc56 | 2524 | return NULL; |
d15b8459 | 2525 | |
7044cc56 KV |
2526 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2527 | ||
2528 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2529 | memset(pspoll, 0, sizeof(*pspoll)); | |
2530 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2531 | IEEE80211_STYPE_PSPOLL); | |
2532 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2533 | ||
2534 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2535 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2536 | ||
2537 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2538 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2539 | ||
2540 | return skb; | |
2541 | } | |
2542 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2543 | ||
2544 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2545 | struct ieee80211_vif *vif) | |
2546 | { | |
2547 | struct ieee80211_hdr_3addr *nullfunc; | |
2548 | struct ieee80211_sub_if_data *sdata; | |
2549 | struct ieee80211_if_managed *ifmgd; | |
2550 | struct ieee80211_local *local; | |
2551 | struct sk_buff *skb; | |
2552 | ||
2553 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2554 | return NULL; | |
2555 | ||
2556 | sdata = vif_to_sdata(vif); | |
2557 | ifmgd = &sdata->u.mgd; | |
2558 | local = sdata->local; | |
2559 | ||
2560 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2561 | if (!skb) |
7044cc56 | 2562 | return NULL; |
d15b8459 | 2563 | |
7044cc56 KV |
2564 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2565 | ||
2566 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2567 | sizeof(*nullfunc)); | |
2568 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2569 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2570 | IEEE80211_STYPE_NULLFUNC | | |
2571 | IEEE80211_FCTL_TODS); | |
2572 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2573 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2574 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2575 | ||
2576 | return skb; | |
2577 | } | |
2578 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2579 | ||
05e54ea6 KV |
2580 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2581 | struct ieee80211_vif *vif, | |
2582 | const u8 *ssid, size_t ssid_len, | |
2583 | const u8 *ie, size_t ie_len) | |
2584 | { | |
2585 | struct ieee80211_sub_if_data *sdata; | |
2586 | struct ieee80211_local *local; | |
2587 | struct ieee80211_hdr_3addr *hdr; | |
2588 | struct sk_buff *skb; | |
2589 | size_t ie_ssid_len; | |
2590 | u8 *pos; | |
2591 | ||
2592 | sdata = vif_to_sdata(vif); | |
2593 | local = sdata->local; | |
2594 | ie_ssid_len = 2 + ssid_len; | |
2595 | ||
2596 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
2597 | ie_ssid_len + ie_len); | |
d15b8459 | 2598 | if (!skb) |
05e54ea6 | 2599 | return NULL; |
05e54ea6 KV |
2600 | |
2601 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2602 | ||
2603 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2604 | memset(hdr, 0, sizeof(*hdr)); | |
2605 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2606 | IEEE80211_STYPE_PROBE_REQ); | |
2607 | memset(hdr->addr1, 0xff, ETH_ALEN); | |
2608 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); | |
2609 | memset(hdr->addr3, 0xff, ETH_ALEN); | |
2610 | ||
2611 | pos = skb_put(skb, ie_ssid_len); | |
2612 | *pos++ = WLAN_EID_SSID; | |
2613 | *pos++ = ssid_len; | |
88c868c4 | 2614 | if (ssid_len) |
05e54ea6 KV |
2615 | memcpy(pos, ssid, ssid_len); |
2616 | pos += ssid_len; | |
2617 | ||
2618 | if (ie) { | |
2619 | pos = skb_put(skb, ie_len); | |
2620 | memcpy(pos, ie, ie_len); | |
2621 | } | |
2622 | ||
2623 | return skb; | |
2624 | } | |
2625 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2626 | ||
32bfd35d | 2627 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2628 | const void *frame, size_t frame_len, |
e039fa4a | 2629 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2630 | struct ieee80211_rts *rts) |
2631 | { | |
2632 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2633 | |
065e9605 HH |
2634 | rts->frame_control = |
2635 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2636 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2637 | frame_txctl); | |
e2ebc74d JB |
2638 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2639 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2640 | } | |
2641 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2642 | ||
32bfd35d | 2643 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2644 | const void *frame, size_t frame_len, |
e039fa4a | 2645 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2646 | struct ieee80211_cts *cts) |
2647 | { | |
2648 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2649 | |
065e9605 HH |
2650 | cts->frame_control = |
2651 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2652 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2653 | frame_len, frame_txctl); | |
e2ebc74d JB |
2654 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2655 | } | |
2656 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2657 | ||
2658 | struct sk_buff * | |
32bfd35d | 2659 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2660 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2661 | { |
2662 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2663 | struct sk_buff *skb = NULL; |
5cf121c3 | 2664 | struct ieee80211_tx_data tx; |
e2ebc74d JB |
2665 | struct ieee80211_sub_if_data *sdata; |
2666 | struct ieee80211_if_ap *bss = NULL; | |
5dfdaf58 | 2667 | struct beacon_data *beacon; |
e039fa4a | 2668 | struct ieee80211_tx_info *info; |
e2ebc74d | 2669 | |
32bfd35d | 2670 | sdata = vif_to_sdata(vif); |
747cf5e9 | 2671 | bss = &sdata->u.ap; |
5dfdaf58 | 2672 | |
5dfdaf58 JB |
2673 | rcu_read_lock(); |
2674 | beacon = rcu_dereference(bss->beacon); | |
2675 | ||
05c914fe | 2676 | if (sdata->vif.type != NL80211_IFTYPE_AP || !beacon || !beacon->head) |
747cf5e9 | 2677 | goto out; |
5dfdaf58 | 2678 | |
512119b3 | 2679 | if (bss->dtim_count != 0 || !bss->dtim_bc_mc) |
747cf5e9 | 2680 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2681 | |
e2ebc74d JB |
2682 | while (1) { |
2683 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2684 | if (!skb) | |
747cf5e9 | 2685 | goto out; |
e2ebc74d JB |
2686 | local->total_ps_buffered--; |
2687 | ||
2688 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2689 | struct ieee80211_hdr *hdr = | |
2690 | (struct ieee80211_hdr *) skb->data; | |
2691 | /* more buffered multicast/broadcast frames ==> set | |
2692 | * MoreData flag in IEEE 802.11 header to inform PS | |
2693 | * STAs */ | |
2694 | hdr->frame_control |= | |
2695 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2696 | } | |
2697 | ||
3b8d81e0 | 2698 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2699 | break; |
2700 | dev_kfree_skb_any(skb); | |
2701 | } | |
e039fa4a JB |
2702 | |
2703 | info = IEEE80211_SKB_CB(skb); | |
2704 | ||
5cf121c3 JB |
2705 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
2706 | tx.channel = local->hw.conf.channel; | |
e039fa4a | 2707 | info->band = tx.channel->band; |
e2ebc74d | 2708 | |
97b045d6 | 2709 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2710 | skb = NULL; |
97b045d6 | 2711 | out: |
d0709a65 | 2712 | rcu_read_unlock(); |
e2ebc74d JB |
2713 | |
2714 | return skb; | |
2715 | } | |
2716 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2717 | |
cf6bb79a HS |
2718 | void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata, |
2719 | struct sk_buff *skb, int tid) | |
3b8d81e0 | 2720 | { |
3a25a8c8 JB |
2721 | int ac = ieee802_1d_to_ac[tid]; |
2722 | ||
3b8d81e0 JB |
2723 | skb_set_mac_header(skb, 0); |
2724 | skb_set_network_header(skb, 0); | |
2725 | skb_set_transport_header(skb, 0); | |
2726 | ||
3a25a8c8 | 2727 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 2728 | skb->priority = tid; |
cf0277e7 | 2729 | |
3d34deb6 JB |
2730 | /* |
2731 | * The other path calling ieee80211_xmit is from the tasklet, | |
2732 | * and while we can handle concurrent transmissions locking | |
2733 | * requirements are that we do not come into tx with bhs on. | |
2734 | */ | |
2735 | local_bh_disable(); | |
3b8d81e0 | 2736 | ieee80211_xmit(sdata, skb); |
3d34deb6 | 2737 | local_bh_enable(); |
3b8d81e0 | 2738 | } |