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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> | |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
e2ebc74d JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * | |
13 | * Transmit and frame generation functions. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/bitmap.h> | |
d4e46a3d | 21 | #include <linux/rcupdate.h> |
bc3b2d7f | 22 | #include <linux/export.h> |
881d966b | 23 | #include <net/net_namespace.h> |
e2ebc74d JB |
24 | #include <net/ieee80211_radiotap.h> |
25 | #include <net/cfg80211.h> | |
26 | #include <net/mac80211.h> | |
27 | #include <asm/unaligned.h> | |
28 | ||
29 | #include "ieee80211_i.h" | |
24487981 | 30 | #include "driver-ops.h" |
2c8dccc7 | 31 | #include "led.h" |
33b64eb2 | 32 | #include "mesh.h" |
e2ebc74d JB |
33 | #include "wep.h" |
34 | #include "wpa.h" | |
35 | #include "wme.h" | |
2c8dccc7 | 36 | #include "rate.h" |
e2ebc74d | 37 | |
e2ebc74d JB |
38 | /* misc utils */ |
39 | ||
5a490510 JB |
40 | static inline void ieee80211_tx_stats(struct net_device *dev, u32 len) |
41 | { | |
42 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); | |
43 | ||
44 | u64_stats_update_begin(&tstats->syncp); | |
45 | tstats->tx_packets++; | |
46 | tstats->tx_bytes += len; | |
47 | u64_stats_update_end(&tstats->syncp); | |
48 | } | |
49 | ||
252b86c4 JB |
50 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
51 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 52 | int next_frag_len) |
e2ebc74d | 53 | { |
2103dec1 | 54 | int rate, mrate, erp, dur, i, shift = 0; |
2e92e6f2 | 55 | struct ieee80211_rate *txrate; |
e2ebc74d | 56 | struct ieee80211_local *local = tx->local; |
8318d78a | 57 | struct ieee80211_supported_band *sband; |
358c8d9d | 58 | struct ieee80211_hdr *hdr; |
252b86c4 | 59 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2103dec1 SW |
60 | struct ieee80211_chanctx_conf *chanctx_conf; |
61 | u32 rate_flags = 0; | |
62 | ||
63 | rcu_read_lock(); | |
64 | chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf); | |
65 | if (chanctx_conf) { | |
66 | shift = ieee80211_chandef_get_shift(&chanctx_conf->def); | |
67 | rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def); | |
68 | } | |
69 | rcu_read_unlock(); | |
e6a9854b JB |
70 | |
71 | /* assume HW handles this */ | |
336004e2 | 72 | if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)) |
e6a9854b JB |
73 | return 0; |
74 | ||
75 | /* uh huh? */ | |
0d528d85 | 76 | if (WARN_ON_ONCE(tx->rate.idx < 0)) |
e6a9854b | 77 | return 0; |
e2ebc74d | 78 | |
2d56577b | 79 | sband = local->hw.wiphy->bands[info->band]; |
0d528d85 | 80 | txrate = &sband->bitrates[tx->rate.idx]; |
8318d78a | 81 | |
e6a9854b | 82 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
83 | |
84 | /* | |
85 | * data and mgmt (except PS Poll): | |
86 | * - during CFP: 32768 | |
87 | * - during contention period: | |
88 | * if addr1 is group address: 0 | |
89 | * if more fragments = 0 and addr1 is individual address: time to | |
90 | * transmit one ACK plus SIFS | |
91 | * if more fragments = 1 and addr1 is individual address: time to | |
92 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
93 | * | |
94 | * IEEE 802.11, 9.6: | |
95 | * - control response frame (CTS or ACK) shall be transmitted using the | |
96 | * same rate as the immediately previous frame in the frame exchange | |
97 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
98 | * at the highest possible rate belonging to the PHY rates in the | |
99 | * BSSBasicRateSet | |
100 | */ | |
252b86c4 | 101 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 102 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 103 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 104 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
105 | * needs to be updated to support duration field calculation. |
106 | * | |
107 | * RTS: time needed to transmit pending data/mgmt frame plus | |
108 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
109 | * CTS: duration of immediately previous RTS minus time | |
110 | * required to transmit CTS and its SIFS | |
111 | * ACK: 0 if immediately previous directed data/mgmt had | |
112 | * more=0, with more=1 duration in ACK frame is duration | |
113 | * from previous frame minus time needed to transmit ACK | |
114 | * and its SIFS | |
115 | * PS Poll: BIT(15) | BIT(14) | aid | |
116 | */ | |
117 | return 0; | |
118 | } | |
119 | ||
120 | /* data/mgmt */ | |
121 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 122 | return cpu_to_le16(32768); |
e2ebc74d JB |
123 | |
124 | if (group_addr) /* Group address as the destination - no ACK */ | |
125 | return 0; | |
126 | ||
127 | /* Individual destination address: | |
128 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
129 | * CTS and ACK frames shall be transmitted using the highest rate in | |
130 | * basic rate set that is less than or equal to the rate of the | |
131 | * immediately previous frame and that is using the same modulation | |
132 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
133 | * the highest mandatory rate of the PHY that is less than or equal to | |
134 | * the rate of the previous frame is used. | |
135 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
136 | */ | |
137 | rate = -1; | |
8318d78a JB |
138 | /* use lowest available if everything fails */ |
139 | mrate = sband->bitrates[0].bitrate; | |
140 | for (i = 0; i < sband->n_bitrates; i++) { | |
141 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 142 | |
8318d78a JB |
143 | if (r->bitrate > txrate->bitrate) |
144 | break; | |
e2ebc74d | 145 | |
2103dec1 SW |
146 | if ((rate_flags & r->flags) != rate_flags) |
147 | continue; | |
148 | ||
bda3933a | 149 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
2103dec1 | 150 | rate = DIV_ROUND_UP(r->bitrate, 1 << shift); |
8318d78a JB |
151 | |
152 | switch (sband->band) { | |
153 | case IEEE80211_BAND_2GHZ: { | |
154 | u32 flag; | |
155 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
156 | flag = IEEE80211_RATE_MANDATORY_G; | |
157 | else | |
158 | flag = IEEE80211_RATE_MANDATORY_B; | |
159 | if (r->flags & flag) | |
160 | mrate = r->bitrate; | |
161 | break; | |
162 | } | |
163 | case IEEE80211_BAND_5GHZ: | |
164 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
165 | mrate = r->bitrate; | |
166 | break; | |
3a0c52a6 VK |
167 | case IEEE80211_BAND_60GHZ: |
168 | /* TODO, for now fall through */ | |
8318d78a JB |
169 | case IEEE80211_NUM_BANDS: |
170 | WARN_ON(1); | |
171 | break; | |
172 | } | |
e2ebc74d JB |
173 | } |
174 | if (rate == -1) { | |
175 | /* No matching basic rate found; use highest suitable mandatory | |
176 | * PHY rate */ | |
2103dec1 | 177 | rate = DIV_ROUND_UP(mrate, 1 << shift); |
e2ebc74d JB |
178 | } |
179 | ||
6674f210 SW |
180 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
181 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 182 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
183 | dur = 0; |
184 | else | |
185 | /* Time needed to transmit ACK | |
186 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
187 | * to closest integer */ | |
4ee73f33 | 188 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
438b61b7 SW |
189 | tx->sdata->vif.bss_conf.use_short_preamble, |
190 | shift); | |
e2ebc74d JB |
191 | |
192 | if (next_frag_len) { | |
193 | /* Frame is fragmented: duration increases with time needed to | |
194 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
195 | dur *= 2; /* ACK + SIFS */ | |
196 | /* next fragment */ | |
4ee73f33 | 197 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 198 | txrate->bitrate, erp, |
438b61b7 SW |
199 | tx->sdata->vif.bss_conf.use_short_preamble, |
200 | shift); | |
e2ebc74d JB |
201 | } |
202 | ||
03f93c3d | 203 | return cpu_to_le16(dur); |
e2ebc74d JB |
204 | } |
205 | ||
e2ebc74d | 206 | /* tx handlers */ |
5c1b98a5 KV |
207 | static ieee80211_tx_result debug_noinline |
208 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
209 | { | |
210 | struct ieee80211_local *local = tx->local; | |
0c74211d | 211 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
212 | |
213 | /* driver doesn't support power save */ | |
214 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
215 | return TX_CONTINUE; | |
216 | ||
217 | /* hardware does dynamic power save */ | |
218 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
219 | return TX_CONTINUE; | |
220 | ||
221 | /* dynamic power save disabled */ | |
222 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
223 | return TX_CONTINUE; | |
224 | ||
225 | /* we are scanning, don't enable power save */ | |
226 | if (local->scanning) | |
227 | return TX_CONTINUE; | |
228 | ||
229 | if (!local->ps_sdata) | |
230 | return TX_CONTINUE; | |
231 | ||
232 | /* No point if we're going to suspend */ | |
233 | if (local->quiescing) | |
234 | return TX_CONTINUE; | |
235 | ||
0c74211d KV |
236 | /* dynamic ps is supported only in managed mode */ |
237 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
238 | return TX_CONTINUE; | |
239 | ||
240 | ifmgd = &tx->sdata->u.mgd; | |
241 | ||
242 | /* | |
243 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
244 | * u-apsd enabled and the frame is in voip class. This effectively | |
245 | * means that even if all access categories have u-apsd enabled, in | |
246 | * practise u-apsd is only used with the voip ac. This is a | |
247 | * workaround for the case when received voip class packets do not | |
248 | * have correct qos tag for some reason, due the network or the | |
249 | * peer application. | |
250 | * | |
dc41e4d4 | 251 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
252 | * changed via debugfs, user needs to reassociate manually to have |
253 | * everything in sync. | |
254 | */ | |
4875d30d JB |
255 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
256 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
257 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
258 | return TX_CONTINUE; |
259 | ||
5c1b98a5 KV |
260 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
261 | ieee80211_stop_queues_by_reason(&local->hw, | |
445ea4e8 | 262 | IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
263 | IEEE80211_QUEUE_STOP_REASON_PS, |
264 | false); | |
db28569a | 265 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
266 | ieee80211_queue_work(&local->hw, |
267 | &local->dynamic_ps_disable_work); | |
268 | } | |
269 | ||
5db1c07c LC |
270 | /* Don't restart the timer if we're not disassociated */ |
271 | if (!ifmgd->associated) | |
272 | return TX_CONTINUE; | |
273 | ||
5c1b98a5 KV |
274 | mod_timer(&local->dynamic_ps_timer, jiffies + |
275 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
276 | ||
277 | return TX_CONTINUE; | |
278 | } | |
e2ebc74d | 279 | |
d9e8a70f | 280 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 281 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 282 | { |
358c8d9d | 283 | |
e039fa4a | 284 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 285 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 286 | bool assoc = false; |
e2ebc74d | 287 | |
e039fa4a | 288 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 289 | return TX_CONTINUE; |
58d4185e | 290 | |
b23b025f BG |
291 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
292 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
293 | !ieee80211_is_probe_req(hdr->frame_control) && |
294 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
295 | /* | |
296 | * When software scanning only nullfunc frames (to notify | |
297 | * the sleep state to the AP) and probe requests (for the | |
298 | * active scan) are allowed, all other frames should not be | |
299 | * sent and we should not get here, but if we do | |
300 | * nonetheless, drop them to avoid sending them | |
301 | * off-channel. See the link below and | |
302 | * ieee80211_start_scan() for more. | |
303 | * | |
304 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
305 | */ | |
9ae54c84 | 306 | return TX_DROP; |
e2ebc74d | 307 | |
239281f8 RL |
308 | if (tx->sdata->vif.type == NL80211_IFTYPE_OCB) |
309 | return TX_CONTINUE; | |
310 | ||
1be7fe8d BJ |
311 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
312 | return TX_CONTINUE; | |
313 | ||
05c914fe | 314 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
315 | return TX_CONTINUE; |
316 | ||
5cf121c3 | 317 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 318 | return TX_CONTINUE; |
e2ebc74d | 319 | |
c2c98fde JB |
320 | if (tx->sta) |
321 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 322 | |
5cf121c3 | 323 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 324 | if (unlikely(!assoc && |
358c8d9d | 325 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 326 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
327 | sdata_info(tx->sdata, |
328 | "dropped data frame to not associated station %pM\n", | |
329 | hdr->addr1); | |
330 | #endif | |
e2ebc74d | 331 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 332 | return TX_DROP; |
e2ebc74d | 333 | } |
29623892 JB |
334 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
335 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 336 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
337 | /* |
338 | * No associated STAs - no need to send multicast | |
339 | * frames. | |
340 | */ | |
341 | return TX_DROP; | |
e2ebc74d JB |
342 | } |
343 | ||
9ae54c84 | 344 | return TX_CONTINUE; |
e2ebc74d JB |
345 | } |
346 | ||
e2ebc74d JB |
347 | /* This function is called whenever the AP is about to exceed the maximum limit |
348 | * of buffered frames for power saving STAs. This situation should not really | |
349 | * happen often during normal operation, so dropping the oldest buffered packet | |
350 | * from each queue should be OK to make some room for new frames. */ | |
351 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
352 | { | |
353 | int total = 0, purged = 0; | |
354 | struct sk_buff *skb; | |
355 | struct ieee80211_sub_if_data *sdata; | |
356 | struct sta_info *sta; | |
357 | ||
79010420 | 358 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
359 | struct ps_data *ps; |
360 | ||
361 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
362 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
363 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
364 | ps = &sdata->u.mesh.ps; | |
d012a605 | 365 | else |
e2ebc74d | 366 | continue; |
d012a605 MP |
367 | |
368 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
369 | if (skb) { |
370 | purged++; | |
371 | dev_kfree_skb(skb); | |
372 | } | |
d012a605 | 373 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 374 | } |
e2ebc74d | 375 | |
948d887d JB |
376 | /* |
377 | * Drop one frame from each station from the lowest-priority | |
378 | * AC that has frames at all. | |
379 | */ | |
d0709a65 | 380 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
381 | int ac; |
382 | ||
383 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
384 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
385 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
386 | if (skb) { | |
387 | purged++; | |
c3e7724b | 388 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
389 | break; |
390 | } | |
e2ebc74d | 391 | } |
e2ebc74d | 392 | } |
d0709a65 | 393 | |
e2ebc74d | 394 | local->total_ps_buffered = total; |
bdcbd8e0 | 395 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
396 | } |
397 | ||
9ae54c84 | 398 | static ieee80211_tx_result |
5cf121c3 | 399 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 400 | { |
e039fa4a | 401 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 402 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 403 | struct ps_data *ps; |
e039fa4a | 404 | |
7d54d0dd JB |
405 | /* |
406 | * broadcast/multicast frame | |
407 | * | |
3f52b7e3 | 408 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
409 | * the frame is buffered to be sent after DTIM beacon frame. |
410 | * This is done either by the hardware or us. | |
411 | */ | |
412 | ||
3f52b7e3 | 413 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
414 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
415 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
416 | if (!tx->sdata->bss) | |
417 | return TX_CONTINUE; | |
418 | ||
419 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
420 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
421 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 422 | } else { |
3e122be0 | 423 | return TX_CONTINUE; |
d012a605 MP |
424 | } |
425 | ||
3e122be0 JB |
426 | |
427 | /* no buffering for ordered frames */ | |
358c8d9d | 428 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 429 | return TX_CONTINUE; |
7d54d0dd | 430 | |
08b99399 JB |
431 | if (ieee80211_is_probe_req(hdr->frame_control)) |
432 | return TX_CONTINUE; | |
433 | ||
f4d57941 JB |
434 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
435 | info->hw_queue = tx->sdata->vif.cab_queue; | |
436 | ||
7d54d0dd | 437 | /* no stations in PS mode */ |
d012a605 | 438 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 439 | return TX_CONTINUE; |
7d54d0dd | 440 | |
62b517cb | 441 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 442 | |
62b517cb JB |
443 | /* device releases frame after DTIM beacon */ |
444 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 445 | return TX_CONTINUE; |
62b1208e | 446 | |
7d54d0dd | 447 | /* buffered in mac80211 */ |
62b1208e JB |
448 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
449 | purge_old_ps_buffers(tx->local); | |
450 | ||
d012a605 | 451 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
452 | ps_dbg(tx->sdata, |
453 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 454 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
455 | } else |
456 | tx->local->total_ps_buffered++; | |
e2ebc74d | 457 | |
d012a605 | 458 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 459 | |
62b1208e | 460 | return TX_QUEUED; |
e2ebc74d JB |
461 | } |
462 | ||
fb733336 JM |
463 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
464 | struct sk_buff *skb) | |
465 | { | |
466 | if (!ieee80211_is_mgmt(fc)) | |
467 | return 0; | |
468 | ||
c2c98fde | 469 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
470 | return 0; |
471 | ||
d8ca16db | 472 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
fb733336 JM |
473 | return 0; |
474 | ||
475 | return 1; | |
476 | } | |
477 | ||
9ae54c84 | 478 | static ieee80211_tx_result |
5cf121c3 | 479 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
480 | { |
481 | struct sta_info *sta = tx->sta; | |
e039fa4a | 482 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
08b99399 | 483 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 484 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 485 | |
02f2f1a9 | 486 | if (unlikely(!sta)) |
9ae54c84 | 487 | return TX_CONTINUE; |
e2ebc74d | 488 | |
c2c98fde | 489 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
5ac2e350 JB |
490 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || |
491 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) && | |
02f2f1a9 | 492 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
493 | int ac = skb_get_queue_mapping(tx->skb); |
494 | ||
08b99399 JB |
495 | if (ieee80211_is_mgmt(hdr->frame_control) && |
496 | !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) { | |
497 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
498 | return TX_CONTINUE; | |
499 | } | |
500 | ||
bdcbd8e0 JB |
501 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
502 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
503 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
504 | purge_old_ps_buffers(tx->local); | |
1d147bfa EG |
505 | |
506 | /* sync with ieee80211_sta_ps_deliver_wakeup */ | |
507 | spin_lock(&sta->ps_lock); | |
508 | /* | |
509 | * STA woke up the meantime and all the frames on ps_tx_buf have | |
510 | * been queued to pending queue. No reordering can happen, go | |
511 | * ahead and Tx the packet. | |
512 | */ | |
513 | if (!test_sta_flag(sta, WLAN_STA_PS_STA) && | |
5ac2e350 JB |
514 | !test_sta_flag(sta, WLAN_STA_PS_DRIVER) && |
515 | !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) { | |
1d147bfa EG |
516 | spin_unlock(&sta->ps_lock); |
517 | return TX_CONTINUE; | |
518 | } | |
519 | ||
948d887d JB |
520 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
521 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
522 | ps_dbg(tx->sdata, |
523 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
524 | sta->sta.addr, ac); | |
c3e7724b | 525 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
526 | } else |
527 | tx->local->total_ps_buffered++; | |
004c872e | 528 | |
e039fa4a | 529 | info->control.jiffies = jiffies; |
5061b0c2 | 530 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 531 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
03c8c06f | 532 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
948d887d | 533 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
1d147bfa | 534 | spin_unlock(&sta->ps_lock); |
3393a608 JO |
535 | |
536 | if (!timer_pending(&local->sta_cleanup)) | |
537 | mod_timer(&local->sta_cleanup, | |
538 | round_jiffies(jiffies + | |
539 | STA_INFO_CLEANUP_INTERVAL)); | |
540 | ||
c868cb35 JB |
541 | /* |
542 | * We queued up some frames, so the TIM bit might | |
543 | * need to be set, recalculate it. | |
544 | */ | |
545 | sta_info_recalc_tim(sta); | |
546 | ||
9ae54c84 | 547 | return TX_QUEUED; |
bdcbd8e0 JB |
548 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
549 | ps_dbg(tx->sdata, | |
550 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
551 | sta->sta.addr); | |
e2ebc74d | 552 | } |
e2ebc74d | 553 | |
9ae54c84 | 554 | return TX_CONTINUE; |
e2ebc74d JB |
555 | } |
556 | ||
d9e8a70f | 557 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 558 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 559 | { |
5cf121c3 | 560 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 561 | return TX_CONTINUE; |
e2ebc74d | 562 | |
5cf121c3 | 563 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
564 | return ieee80211_tx_h_unicast_ps_buf(tx); |
565 | else | |
566 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
567 | } | |
568 | ||
a621fa4d JB |
569 | static ieee80211_tx_result debug_noinline |
570 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
571 | { | |
572 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
573 | ||
af61a165 JB |
574 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) { |
575 | if (tx->sdata->control_port_no_encrypt) | |
576 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
577 | info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO; | |
9c1c98a3 | 578 | info->flags |= IEEE80211_TX_CTL_USE_MINRATE; |
af61a165 | 579 | } |
a621fa4d JB |
580 | |
581 | return TX_CONTINUE; | |
582 | } | |
583 | ||
d9e8a70f | 584 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 585 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 586 | { |
46e6de15 | 587 | struct ieee80211_key *key; |
e039fa4a | 588 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 589 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 590 | |
3b8d81e0 | 591 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 592 | tx->key = NULL; |
2475b1cc MS |
593 | else if (tx->sta && |
594 | (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx]))) | |
d4e46a3d | 595 | tx->key = key; |
3cfcf6ac | 596 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 | 597 | is_multicast_ether_addr(hdr->addr1) && |
d8ca16db | 598 | ieee80211_is_robust_mgmt_frame(tx->skb) && |
3cfcf6ac JM |
599 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
600 | tx->key = key; | |
f7e0104c JB |
601 | else if (is_multicast_ether_addr(hdr->addr1) && |
602 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
603 | tx->key = key; | |
604 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
605 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 606 | tx->key = key; |
e8f4fb7c | 607 | else |
4922f71f | 608 | tx->key = NULL; |
e2ebc74d JB |
609 | |
610 | if (tx->key) { | |
813d7669 JB |
611 | bool skip_hw = false; |
612 | ||
e2ebc74d | 613 | tx->key->tx_rx_count++; |
011bfcc4 | 614 | /* TODO: add threshold stuff again */ |
176e4f84 | 615 | |
97359d12 JB |
616 | switch (tx->key->conf.cipher) { |
617 | case WLAN_CIPHER_SUITE_WEP40: | |
618 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 619 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 620 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
621 | tx->key = NULL; |
622 | break; | |
97359d12 | 623 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db | 624 | case WLAN_CIPHER_SUITE_CCMP_256: |
00b9cfa3 JM |
625 | case WLAN_CIPHER_SUITE_GCMP: |
626 | case WLAN_CIPHER_SUITE_GCMP_256: | |
fb733336 JM |
627 | if (!ieee80211_is_data_present(hdr->frame_control) && |
628 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
629 | tx->skb)) | |
630 | tx->key = NULL; | |
3b43a187 KV |
631 | else |
632 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 633 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 634 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 635 | break; |
97359d12 | 636 | case WLAN_CIPHER_SUITE_AES_CMAC: |
56c52da2 | 637 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
8ade538b JM |
638 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
639 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
3cfcf6ac JM |
640 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
641 | tx->key = NULL; | |
642 | break; | |
176e4f84 | 643 | } |
813d7669 | 644 | |
e54faf29 JB |
645 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
646 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
647 | return TX_DROP; |
648 | ||
f12553eb | 649 | if (!skip_hw && tx->key && |
382b1655 | 650 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 651 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
652 | } |
653 | ||
9ae54c84 | 654 | return TX_CONTINUE; |
e2ebc74d JB |
655 | } |
656 | ||
d9e8a70f | 657 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 658 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 659 | { |
e039fa4a | 660 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
661 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
662 | struct ieee80211_supported_band *sband; | |
a2c40249 | 663 | u32 len; |
e6a9854b | 664 | struct ieee80211_tx_rate_control txrc; |
0d528d85 | 665 | struct ieee80211_sta_rates *ratetbl = NULL; |
c2c98fde | 666 | bool assoc = false; |
8318d78a | 667 | |
e6a9854b | 668 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 669 | |
2d56577b | 670 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 671 | |
a2c40249 | 672 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 673 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
674 | |
675 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 676 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
677 | txrc.sband = sband; |
678 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
679 | txrc.skb = tx->skb; | |
680 | txrc.reported_rate.idx = -1; | |
2d56577b | 681 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
682 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
683 | txrc.max_rate_idx = -1; | |
684 | else | |
685 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
2ffbe6d3 FF |
686 | |
687 | if (tx->sdata->rc_has_mcs_mask[info->band]) | |
688 | txrc.rate_idx_mcs_mask = | |
689 | tx->sdata->rc_rateidx_mcs_mask[info->band]; | |
690 | ||
8f0729b1 | 691 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 692 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 693 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
694 | |
695 | /* set up RTS protection if desired */ | |
b9a5f8ca | 696 | if (len > tx->local->hw.wiphy->rts_threshold) { |
0d528d85 | 697 | txrc.rts = true; |
e2ebc74d | 698 | } |
e2ebc74d | 699 | |
0d528d85 | 700 | info->control.use_rts = txrc.rts; |
991fec09 FF |
701 | info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot; |
702 | ||
e6a9854b JB |
703 | /* |
704 | * Use short preamble if the BSS can handle it, but not for | |
705 | * management frames unless we know the receiver can handle | |
706 | * that -- the management frame might be to a station that | |
707 | * just wants a probe response. | |
708 | */ | |
709 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
710 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 711 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
0d528d85 FF |
712 | txrc.short_preamble = true; |
713 | ||
714 | info->control.short_preamble = txrc.short_preamble; | |
e2ebc74d | 715 | |
c2c98fde JB |
716 | if (tx->sta) |
717 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
718 | |
719 | /* | |
720 | * Lets not bother rate control if we're associated and cannot | |
721 | * talk to the sta. This should not happen. | |
722 | */ | |
c2c98fde | 723 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
724 | !rate_usable_index_exists(sband, &tx->sta->sta), |
725 | "%s: Dropped data frame as no usable bitrate found while " | |
726 | "scanning and associated. Target station: " | |
727 | "%pM on %d GHz band\n", | |
47846c9b | 728 | tx->sdata->name, hdr->addr1, |
2d56577b | 729 | info->band ? 5 : 2)) |
b770b43e | 730 | return TX_DROP; |
2e92e6f2 | 731 | |
b770b43e LR |
732 | /* |
733 | * If we're associated with the sta at this point we know we can at | |
734 | * least send the frame at the lowest bit rate. | |
735 | */ | |
e6a9854b JB |
736 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
737 | ||
0d528d85 FF |
738 | if (tx->sta && !info->control.skip_table) |
739 | ratetbl = rcu_dereference(tx->sta->sta.rates); | |
740 | ||
741 | if (unlikely(info->control.rates[0].idx < 0)) { | |
742 | if (ratetbl) { | |
743 | struct ieee80211_tx_rate rate = { | |
744 | .idx = ratetbl->rate[0].idx, | |
745 | .flags = ratetbl->rate[0].flags, | |
746 | .count = ratetbl->rate[0].count | |
747 | }; | |
748 | ||
749 | if (ratetbl->rate[0].idx < 0) | |
750 | return TX_DROP; | |
751 | ||
752 | tx->rate = rate; | |
753 | } else { | |
754 | return TX_DROP; | |
755 | } | |
756 | } else { | |
757 | tx->rate = info->control.rates[0]; | |
758 | } | |
e6a9854b | 759 | |
c1ce5a74 | 760 | if (txrc.reported_rate.idx < 0) { |
0d528d85 | 761 | txrc.reported_rate = tx->rate; |
c1ce5a74 HS |
762 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
763 | tx->sta->last_tx_rate = txrc.reported_rate; | |
764 | } else if (tx->sta) | |
e6a9854b | 765 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 766 | |
0d528d85 FF |
767 | if (ratetbl) |
768 | return TX_CONTINUE; | |
769 | ||
e6a9854b JB |
770 | if (unlikely(!info->control.rates[0].count)) |
771 | info->control.rates[0].count = 1; | |
e2ebc74d | 772 | |
9955151d GS |
773 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
774 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
775 | info->control.rates[0].count = 1; | |
776 | ||
e6a9854b JB |
777 | return TX_CONTINUE; |
778 | } | |
779 | ||
ba8c3d6f FF |
780 | static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid) |
781 | { | |
782 | u16 *seq = &sta->tid_seq[tid]; | |
783 | __le16 ret = cpu_to_le16(*seq); | |
784 | ||
785 | /* Increase the sequence number. */ | |
786 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
787 | ||
788 | return ret; | |
789 | } | |
790 | ||
f591fa5d JB |
791 | static ieee80211_tx_result debug_noinline |
792 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
793 | { | |
794 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
795 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
f591fa5d JB |
796 | u8 *qc; |
797 | int tid; | |
798 | ||
25d834e1 JB |
799 | /* |
800 | * Packet injection may want to control the sequence | |
801 | * number, if we have no matching interface then we | |
802 | * neither assign one ourselves nor ask the driver to. | |
803 | */ | |
5061b0c2 | 804 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
805 | return TX_CONTINUE; |
806 | ||
f591fa5d JB |
807 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
808 | return TX_CONTINUE; | |
809 | ||
810 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
811 | return TX_CONTINUE; | |
812 | ||
49a59543 JB |
813 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
814 | return TX_CONTINUE; | |
815 | ||
94778280 JB |
816 | /* |
817 | * Anything but QoS data that has a sequence number field | |
818 | * (is long enough) gets a sequence number from the global | |
c4c205f3 BC |
819 | * counter. QoS data frames with a multicast destination |
820 | * also use the global counter (802.11-2012 9.3.2.10). | |
94778280 | 821 | */ |
c4c205f3 BC |
822 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
823 | is_multicast_ether_addr(hdr->addr1)) { | |
94778280 | 824 | /* driver should assign sequence number */ |
f591fa5d | 825 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
826 | /* for pure STA mode without beacons, we can do it */ |
827 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
828 | tx->sdata->sequence_number += 0x10; | |
79c892b8 JB |
829 | if (tx->sta) |
830 | tx->sta->tx_msdu[IEEE80211_NUM_TIDS]++; | |
f591fa5d JB |
831 | return TX_CONTINUE; |
832 | } | |
833 | ||
834 | /* | |
835 | * This should be true for injected/management frames only, for | |
836 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
837 | * above since they are not QoS-data frames. | |
838 | */ | |
839 | if (!tx->sta) | |
840 | return TX_CONTINUE; | |
841 | ||
842 | /* include per-STA, per-TID sequence counter */ | |
843 | ||
844 | qc = ieee80211_get_qos_ctl(hdr); | |
845 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
79c892b8 | 846 | tx->sta->tx_msdu[tid]++; |
f591fa5d | 847 | |
ba8c3d6f FF |
848 | if (!tx->sta->sta.txq[0]) |
849 | hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid); | |
f591fa5d JB |
850 | |
851 | return TX_CONTINUE; | |
852 | } | |
853 | ||
252b86c4 | 854 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
855 | struct sk_buff *skb, int hdrlen, |
856 | int frag_threshold) | |
857 | { | |
252b86c4 | 858 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 859 | struct ieee80211_tx_info *info; |
252b86c4 | 860 | struct sk_buff *tmp; |
2de8e0d9 JB |
861 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
862 | int pos = hdrlen + per_fragm; | |
863 | int rem = skb->len - hdrlen - per_fragm; | |
864 | ||
865 | if (WARN_ON(rem < 0)) | |
866 | return -EINVAL; | |
867 | ||
252b86c4 JB |
868 | /* first fragment was already added to queue by caller */ |
869 | ||
2de8e0d9 JB |
870 | while (rem) { |
871 | int fraglen = per_fragm; | |
872 | ||
873 | if (fraglen > rem) | |
874 | fraglen = rem; | |
875 | rem -= fraglen; | |
876 | tmp = dev_alloc_skb(local->tx_headroom + | |
877 | frag_threshold + | |
2475b1cc | 878 | tx->sdata->encrypt_headroom + |
2de8e0d9 JB |
879 | IEEE80211_ENCRYPT_TAILROOM); |
880 | if (!tmp) | |
881 | return -ENOMEM; | |
252b86c4 JB |
882 | |
883 | __skb_queue_tail(&tx->skbs, tmp); | |
884 | ||
2475b1cc MS |
885 | skb_reserve(tmp, |
886 | local->tx_headroom + tx->sdata->encrypt_headroom); | |
887 | ||
2de8e0d9 JB |
888 | /* copy control information */ |
889 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
890 | |
891 | info = IEEE80211_SKB_CB(tmp); | |
892 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
893 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
894 | ||
895 | if (rem) | |
896 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
897 | ||
2de8e0d9 JB |
898 | skb_copy_queue_mapping(tmp, skb); |
899 | tmp->priority = skb->priority; | |
2de8e0d9 | 900 | tmp->dev = skb->dev; |
2de8e0d9 JB |
901 | |
902 | /* copy header and data */ | |
903 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
904 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
905 | ||
906 | pos += fraglen; | |
907 | } | |
908 | ||
252b86c4 | 909 | /* adjust first fragment's length */ |
338f977f | 910 | skb_trim(skb, hdrlen + per_fragm); |
2de8e0d9 JB |
911 | return 0; |
912 | } | |
913 | ||
d9e8a70f | 914 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
915 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
916 | { | |
2de8e0d9 JB |
917 | struct sk_buff *skb = tx->skb; |
918 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
919 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 920 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
921 | int hdrlen; |
922 | int fragnum; | |
e2454948 | 923 | |
252b86c4 JB |
924 | /* no matter what happens, tx->skb moves to tx->skbs */ |
925 | __skb_queue_tail(&tx->skbs, skb); | |
926 | tx->skb = NULL; | |
927 | ||
a26eb27a JB |
928 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
929 | return TX_CONTINUE; | |
930 | ||
931 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
932 | return TX_CONTINUE; |
933 | ||
eefce91a JB |
934 | /* |
935 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 936 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 937 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 938 | */ |
8b30b1fe | 939 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
940 | return TX_DROP; |
941 | ||
065e9605 | 942 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 943 | |
a26eb27a | 944 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 945 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 946 | return TX_DROP; |
e6a9854b | 947 | |
2de8e0d9 JB |
948 | /* |
949 | * Now fragment the frame. This will allocate all the fragments and | |
950 | * chain them (using skb as the first fragment) to skb->next. | |
951 | * During transmission, we will remove the successfully transmitted | |
952 | * fragments from this list. When the low-level driver rejects one | |
953 | * of the fragments then we will simply pretend to accept the skb | |
954 | * but store it away as pending. | |
955 | */ | |
252b86c4 | 956 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 957 | return TX_DROP; |
e6a9854b | 958 | |
2de8e0d9 JB |
959 | /* update duration/seq/flags of fragments */ |
960 | fragnum = 0; | |
252b86c4 JB |
961 | |
962 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 963 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 964 | |
2de8e0d9 JB |
965 | hdr = (void *)skb->data; |
966 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 967 | |
252b86c4 | 968 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 969 | hdr->frame_control |= morefrags; |
e6a9854b JB |
970 | /* |
971 | * No multi-rate retries for fragmented frames, that | |
972 | * would completely throw off the NAV at other STAs. | |
973 | */ | |
974 | info->control.rates[1].idx = -1; | |
975 | info->control.rates[2].idx = -1; | |
976 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 977 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 978 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
979 | } else { |
980 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 981 | } |
2de8e0d9 JB |
982 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
983 | fragnum++; | |
252b86c4 | 984 | } |
e2ebc74d | 985 | |
9ae54c84 | 986 | return TX_CONTINUE; |
e2ebc74d JB |
987 | } |
988 | ||
feff1f2f JB |
989 | static ieee80211_tx_result debug_noinline |
990 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
991 | { | |
252b86c4 | 992 | struct sk_buff *skb; |
560d2682 | 993 | int ac = -1; |
feff1f2f JB |
994 | |
995 | if (!tx->sta) | |
996 | return TX_CONTINUE; | |
997 | ||
252b86c4 | 998 | skb_queue_walk(&tx->skbs, skb) { |
560d2682 | 999 | ac = skb_get_queue_mapping(skb); |
560d2682 | 1000 | tx->sta->tx_bytes[ac] += skb->len; |
252b86c4 | 1001 | } |
560d2682 JB |
1002 | if (ac >= 0) |
1003 | tx->sta->tx_packets[ac]++; | |
feff1f2f JB |
1004 | |
1005 | return TX_CONTINUE; | |
1006 | } | |
1007 | ||
d9e8a70f | 1008 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1009 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1010 | { | |
1011 | if (!tx->key) | |
1012 | return TX_CONTINUE; | |
1013 | ||
97359d12 JB |
1014 | switch (tx->key->conf.cipher) { |
1015 | case WLAN_CIPHER_SUITE_WEP40: | |
1016 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1017 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1018 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1019 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1020 | case WLAN_CIPHER_SUITE_CCMP: |
2b2ba0db JM |
1021 | return ieee80211_crypto_ccmp_encrypt( |
1022 | tx, IEEE80211_CCMP_MIC_LEN); | |
1023 | case WLAN_CIPHER_SUITE_CCMP_256: | |
1024 | return ieee80211_crypto_ccmp_encrypt( | |
1025 | tx, IEEE80211_CCMP_256_MIC_LEN); | |
97359d12 | 1026 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1027 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
56c52da2 JM |
1028 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: |
1029 | return ieee80211_crypto_aes_cmac_256_encrypt(tx); | |
8ade538b JM |
1030 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: |
1031 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
1032 | return ieee80211_crypto_aes_gmac_encrypt(tx); | |
00b9cfa3 JM |
1033 | case WLAN_CIPHER_SUITE_GCMP: |
1034 | case WLAN_CIPHER_SUITE_GCMP_256: | |
1035 | return ieee80211_crypto_gcmp_encrypt(tx); | |
3ffc2a90 | 1036 | default: |
d32a1028 | 1037 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1038 | } |
1039 | ||
e2454948 JB |
1040 | return TX_DROP; |
1041 | } | |
1042 | ||
d9e8a70f | 1043 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1044 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1045 | { | |
252b86c4 | 1046 | struct sk_buff *skb; |
2de8e0d9 JB |
1047 | struct ieee80211_hdr *hdr; |
1048 | int next_len; | |
1049 | bool group_addr; | |
03f93c3d | 1050 | |
252b86c4 | 1051 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1052 | hdr = (void *) skb->data; |
7e0aae47 JM |
1053 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1054 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1055 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1056 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1057 | next_len = next->len; | |
1058 | } else | |
1059 | next_len = 0; | |
2de8e0d9 | 1060 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1061 | |
2de8e0d9 | 1062 | hdr->duration_id = |
252b86c4 JB |
1063 | ieee80211_duration(tx, skb, group_addr, next_len); |
1064 | } | |
03f93c3d JB |
1065 | |
1066 | return TX_CONTINUE; | |
1067 | } | |
1068 | ||
e2ebc74d JB |
1069 | /* actual transmit path */ |
1070 | ||
a622ab72 JB |
1071 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1072 | struct sk_buff *skb, | |
1073 | struct ieee80211_tx_info *info, | |
1074 | struct tid_ampdu_tx *tid_tx, | |
1075 | int tid) | |
1076 | { | |
1077 | bool queued = false; | |
285fa695 | 1078 | bool reset_agg_timer = false; |
aa454580 | 1079 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1080 | |
1081 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1082 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1083 | reset_agg_timer = true; |
0ab33703 JB |
1084 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1085 | /* | |
1086 | * nothing -- this aggregation session is being started | |
1087 | * but that might still fail with the driver | |
1088 | */ | |
ba8c3d6f | 1089 | } else if (!tx->sta->sta.txq[tid]) { |
a622ab72 JB |
1090 | spin_lock(&tx->sta->lock); |
1091 | /* | |
1092 | * Need to re-check now, because we may get here | |
1093 | * | |
1094 | * 1) in the window during which the setup is actually | |
1095 | * already done, but not marked yet because not all | |
1096 | * packets are spliced over to the driver pending | |
1097 | * queue yet -- if this happened we acquire the lock | |
1098 | * either before or after the splice happens, but | |
1099 | * need to recheck which of these cases happened. | |
1100 | * | |
1101 | * 2) during session teardown, if the OPERATIONAL bit | |
1102 | * was cleared due to the teardown but the pointer | |
1103 | * hasn't been assigned NULL yet (or we loaded it | |
1104 | * before it was assigned) -- in this case it may | |
1105 | * now be NULL which means we should just let the | |
1106 | * packet pass through because splicing the frames | |
1107 | * back is already done. | |
1108 | */ | |
40b275b6 | 1109 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1110 | |
1111 | if (!tid_tx) { | |
1112 | /* do nothing, let packet pass through */ | |
1113 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1114 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1115 | reset_agg_timer = true; |
a622ab72 JB |
1116 | } else { |
1117 | queued = true; | |
1118 | info->control.vif = &tx->sdata->vif; | |
1119 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
03c8c06f | 1120 | info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS; |
a622ab72 | 1121 | __skb_queue_tail(&tid_tx->pending, skb); |
aa454580 HS |
1122 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1123 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1124 | } |
1125 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1126 | |
1127 | if (purge_skb) | |
c3e7724b | 1128 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1129 | } |
1130 | ||
285fa695 NM |
1131 | /* reset session timer */ |
1132 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1133 | tid_tx->last_tx = jiffies; |
285fa695 | 1134 | |
a622ab72 JB |
1135 | return queued; |
1136 | } | |
1137 | ||
58d4185e JB |
1138 | /* |
1139 | * initialises @tx | |
7c10770f JB |
1140 | * pass %NULL for the station if unknown, a valid pointer if known |
1141 | * or an ERR_PTR() if the station is known not to exist | |
58d4185e | 1142 | */ |
9ae54c84 | 1143 | static ieee80211_tx_result |
3b8d81e0 JB |
1144 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1145 | struct ieee80211_tx_data *tx, | |
7c10770f | 1146 | struct sta_info *sta, struct sk_buff *skb) |
e2ebc74d | 1147 | { |
3b8d81e0 | 1148 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1149 | struct ieee80211_hdr *hdr; |
e039fa4a | 1150 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1151 | int tid; |
a622ab72 | 1152 | u8 *qc; |
e2ebc74d JB |
1153 | |
1154 | memset(tx, 0, sizeof(*tx)); | |
1155 | tx->skb = skb; | |
e2ebc74d | 1156 | tx->local = local; |
3b8d81e0 | 1157 | tx->sdata = sdata; |
252b86c4 | 1158 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1159 | |
cd8ffc80 JB |
1160 | /* |
1161 | * If this flag is set to true anywhere, and we get here, | |
1162 | * we are doing the needed processing, so remove the flag | |
1163 | * now. | |
1164 | */ | |
1165 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1166 | ||
58d4185e JB |
1167 | hdr = (struct ieee80211_hdr *) skb->data; |
1168 | ||
7c10770f JB |
1169 | if (likely(sta)) { |
1170 | if (!IS_ERR(sta)) | |
1171 | tx->sta = sta; | |
1172 | } else { | |
1173 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
1174 | tx->sta = rcu_dereference(sdata->u.vlan.sta); | |
1175 | if (!tx->sta && sdata->wdev.use_4addr) | |
1176 | return TX_DROP; | |
1177 | } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
1178 | IEEE80211_TX_CTL_INJECTED) || | |
1179 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
1180 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); | |
1181 | } | |
1182 | if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) | |
1183 | tx->sta = sta_info_get(sdata, hdr->addr1); | |
3f0e0b22 | 1184 | } |
58d4185e | 1185 | |
cd8ffc80 | 1186 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1187 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1188 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1189 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1190 | struct tid_ampdu_tx *tid_tx; |
1191 | ||
8b30b1fe S |
1192 | qc = ieee80211_get_qos_ctl(hdr); |
1193 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1194 | ||
a622ab72 JB |
1195 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1196 | if (tid_tx) { | |
1197 | bool queued; | |
cd8ffc80 | 1198 | |
a622ab72 JB |
1199 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1200 | tid_tx, tid); | |
1201 | ||
1202 | if (unlikely(queued)) | |
1203 | return TX_QUEUED; | |
1204 | } | |
8b30b1fe S |
1205 | } |
1206 | ||
badffb72 | 1207 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1208 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1209 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1210 | } else |
5cf121c3 | 1211 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1212 | |
a26eb27a JB |
1213 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1214 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1215 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1216 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1217 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1218 | } |
1219 | ||
e2ebc74d | 1220 | if (!tx->sta) |
e039fa4a | 1221 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1222 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1223 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1224 | |
e039fa4a | 1225 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1226 | |
9ae54c84 | 1227 | return TX_CONTINUE; |
e2ebc74d JB |
1228 | } |
1229 | ||
ba8c3d6f FF |
1230 | static void ieee80211_drv_tx(struct ieee80211_local *local, |
1231 | struct ieee80211_vif *vif, | |
1232 | struct ieee80211_sta *pubsta, | |
1233 | struct sk_buff *skb) | |
1234 | { | |
1235 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1236 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1237 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1238 | struct ieee80211_tx_control control = { | |
1239 | .sta = pubsta, | |
1240 | }; | |
1241 | struct ieee80211_txq *txq = NULL; | |
1242 | struct txq_info *txqi; | |
1243 | u8 ac; | |
1244 | ||
1245 | if (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE) | |
1246 | goto tx_normal; | |
1247 | ||
1248 | if (!ieee80211_is_data(hdr->frame_control)) | |
1249 | goto tx_normal; | |
1250 | ||
1251 | if (pubsta) { | |
1252 | u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; | |
1253 | ||
1254 | txq = pubsta->txq[tid]; | |
1255 | } else if (vif) { | |
1256 | txq = vif->txq; | |
1257 | } | |
1258 | ||
1259 | if (!txq) | |
1260 | goto tx_normal; | |
1261 | ||
1262 | ac = txq->ac; | |
1263 | txqi = to_txq_info(txq); | |
1264 | atomic_inc(&sdata->txqs_len[ac]); | |
1265 | if (atomic_read(&sdata->txqs_len[ac]) >= local->hw.txq_ac_max_pending) | |
1266 | netif_stop_subqueue(sdata->dev, ac); | |
1267 | ||
1268 | skb_queue_tail(&txqi->queue, skb); | |
1269 | drv_wake_tx_queue(local, txqi); | |
1270 | ||
1271 | return; | |
1272 | ||
1273 | tx_normal: | |
1274 | drv_tx(local, &control, skb); | |
1275 | } | |
1276 | ||
1277 | struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, | |
1278 | struct ieee80211_txq *txq) | |
1279 | { | |
1280 | struct ieee80211_local *local = hw_to_local(hw); | |
1281 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif); | |
1282 | struct txq_info *txqi = container_of(txq, struct txq_info, txq); | |
1283 | struct ieee80211_hdr *hdr; | |
1284 | struct sk_buff *skb = NULL; | |
1285 | u8 ac = txq->ac; | |
1286 | ||
1287 | spin_lock_bh(&txqi->queue.lock); | |
1288 | ||
1289 | if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags)) | |
1290 | goto out; | |
1291 | ||
1292 | skb = __skb_dequeue(&txqi->queue); | |
1293 | if (!skb) | |
1294 | goto out; | |
1295 | ||
1296 | atomic_dec(&sdata->txqs_len[ac]); | |
1297 | if (__netif_subqueue_stopped(sdata->dev, ac)) | |
1298 | ieee80211_propagate_queue_wake(local, sdata->vif.hw_queue[ac]); | |
1299 | ||
1300 | hdr = (struct ieee80211_hdr *)skb->data; | |
1301 | if (txq->sta && ieee80211_is_data_qos(hdr->frame_control)) { | |
1302 | struct sta_info *sta = container_of(txq->sta, struct sta_info, | |
1303 | sta); | |
1304 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1305 | ||
1306 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, txq->tid); | |
1307 | if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags)) | |
1308 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
1309 | else | |
1310 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
1311 | } | |
1312 | ||
1313 | out: | |
1314 | spin_unlock_bh(&txqi->queue.lock); | |
1315 | ||
1316 | return skb; | |
1317 | } | |
1318 | EXPORT_SYMBOL(ieee80211_tx_dequeue); | |
1319 | ||
11127e91 JB |
1320 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1321 | struct ieee80211_vif *vif, | |
1322 | struct ieee80211_sta *sta, | |
1323 | struct sk_buff_head *skbs, | |
1324 | bool txpending) | |
e2ebc74d | 1325 | { |
252b86c4 | 1326 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1327 | unsigned long flags; |
e2ebc74d | 1328 | |
252b86c4 | 1329 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1330 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1331 | int q = info->hw_queue; | |
1332 | ||
1333 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1334 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1335 | __skb_unlink(skb, skbs); | |
c3e7724b | 1336 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1337 | continue; |
1338 | } | |
1339 | #endif | |
3b8d81e0 JB |
1340 | |
1341 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1342 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1343 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1344 | if (unlikely(info->flags & |
a7679ed5 SF |
1345 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1346 | if (local->queue_stop_reasons[q] & | |
1347 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1348 | /* | |
1349 | * Drop off-channel frames if queues | |
1350 | * are stopped for any reason other | |
1351 | * than off-channel operation. Never | |
1352 | * queue them. | |
1353 | */ | |
1354 | spin_unlock_irqrestore( | |
1355 | &local->queue_stop_reason_lock, | |
1356 | flags); | |
1357 | ieee80211_purge_tx_queue(&local->hw, | |
1358 | skbs); | |
1359 | return true; | |
1360 | } | |
1361 | } else { | |
1362 | ||
6c17b77b | 1363 | /* |
a7679ed5 SF |
1364 | * Since queue is stopped, queue up frames for |
1365 | * later transmission from the tx-pending | |
1366 | * tasklet when the queue is woken again. | |
6c17b77b | 1367 | */ |
a7679ed5 SF |
1368 | if (txpending) |
1369 | skb_queue_splice_init(skbs, | |
1370 | &local->pending[q]); | |
1371 | else | |
1372 | skb_queue_splice_tail_init(skbs, | |
1373 | &local->pending[q]); | |
1374 | ||
1375 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1376 | flags); | |
1377 | return false; | |
6c17b77b | 1378 | } |
7bb45683 | 1379 | } |
3b8d81e0 | 1380 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1381 | |
11127e91 | 1382 | info->control.vif = vif; |
f0e72851 | 1383 | |
11127e91 | 1384 | __skb_unlink(skb, skbs); |
ba8c3d6f | 1385 | ieee80211_drv_tx(local, vif, sta, skb); |
11127e91 | 1386 | } |
5061b0c2 | 1387 | |
11127e91 JB |
1388 | return true; |
1389 | } | |
1390 | ||
1391 | /* | |
1392 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1393 | */ | |
1394 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1395 | struct sk_buff_head *skbs, int led_len, | |
1396 | struct sta_info *sta, bool txpending) | |
1397 | { | |
1398 | struct ieee80211_tx_info *info; | |
1399 | struct ieee80211_sub_if_data *sdata; | |
1400 | struct ieee80211_vif *vif; | |
1401 | struct ieee80211_sta *pubsta; | |
1402 | struct sk_buff *skb; | |
1403 | bool result = true; | |
1404 | __le16 fc; | |
5061b0c2 | 1405 | |
11127e91 JB |
1406 | if (WARN_ON(skb_queue_empty(skbs))) |
1407 | return true; | |
ec25acc4 | 1408 | |
11127e91 JB |
1409 | skb = skb_peek(skbs); |
1410 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1411 | info = IEEE80211_SKB_CB(skb); | |
1412 | sdata = vif_to_sdata(info->control.vif); | |
1413 | if (sta && !sta->uploaded) | |
1414 | sta = NULL; | |
1415 | ||
1416 | if (sta) | |
1417 | pubsta = &sta->sta; | |
1418 | else | |
1419 | pubsta = NULL; | |
1420 | ||
1421 | switch (sdata->vif.type) { | |
1422 | case NL80211_IFTYPE_MONITOR: | |
c82b5a74 JB |
1423 | if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) { |
1424 | vif = &sdata->vif; | |
1425 | break; | |
1426 | } | |
4b6f1dd6 | 1427 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1428 | if (sdata) { |
4b6f1dd6 | 1429 | vif = &sdata->vif; |
3a25a8c8 JB |
1430 | info->hw_queue = |
1431 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1432 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1433 | dev_kfree_skb(skb); | |
1434 | return true; | |
1435 | } else | |
4b6f1dd6 | 1436 | vif = NULL; |
11127e91 JB |
1437 | break; |
1438 | case NL80211_IFTYPE_AP_VLAN: | |
1439 | sdata = container_of(sdata->bss, | |
1440 | struct ieee80211_sub_if_data, u.ap); | |
1441 | /* fall through */ | |
1442 | default: | |
1443 | vif = &sdata->vif; | |
1444 | break; | |
e2ebc74d | 1445 | } |
2de8e0d9 | 1446 | |
cb831b53 JB |
1447 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1448 | txpending); | |
11127e91 | 1449 | |
74e4dbfd | 1450 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
74e4dbfd | 1451 | |
4db4e0a1 | 1452 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1453 | |
11127e91 | 1454 | return result; |
e2ebc74d JB |
1455 | } |
1456 | ||
97b045d6 JB |
1457 | /* |
1458 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1459 | * frame was dropped or queued. | |
1460 | */ | |
1461 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1462 | { | |
252b86c4 | 1463 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1464 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1465 | |
9aa4aee3 JB |
1466 | #define CALL_TXH(txh) \ |
1467 | do { \ | |
1468 | res = txh(tx); \ | |
1469 | if (res != TX_CONTINUE) \ | |
1470 | goto txh_done; \ | |
1471 | } while (0) | |
1472 | ||
5c1b98a5 | 1473 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1474 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1475 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1476 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1477 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1478 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1479 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1480 | |
aa5b5492 JB |
1481 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1482 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1483 | tx->skb = NULL; | |
c6fcf6bc | 1484 | goto txh_done; |
aa5b5492 | 1485 | } |
c6fcf6bc JB |
1486 | |
1487 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1488 | CALL_TXH(ieee80211_tx_h_sequence); |
1489 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1490 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1491 | CALL_TXH(ieee80211_tx_h_stats); |
1492 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1493 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1494 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1495 | #undef CALL_TXH |
97b045d6 | 1496 | |
d9e8a70f | 1497 | txh_done: |
97b045d6 | 1498 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1499 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1500 | if (tx->skb) |
c3e7724b | 1501 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1502 | else |
1f98ab7f | 1503 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1504 | return -1; |
1505 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1506 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1507 | return -1; |
1508 | } | |
1509 | ||
1510 | return 0; | |
1511 | } | |
1512 | ||
06be6b14 FF |
1513 | bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, |
1514 | struct ieee80211_vif *vif, struct sk_buff *skb, | |
1515 | int band, struct ieee80211_sta **sta) | |
1516 | { | |
1517 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1518 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1519 | struct ieee80211_tx_data tx; | |
88724a81 | 1520 | struct sk_buff *skb2; |
06be6b14 | 1521 | |
7c10770f | 1522 | if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP) |
06be6b14 FF |
1523 | return false; |
1524 | ||
1525 | info->band = band; | |
1526 | info->control.vif = vif; | |
1527 | info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1528 | ||
1529 | if (invoke_tx_handlers(&tx)) | |
1530 | return false; | |
1531 | ||
1532 | if (sta) { | |
1533 | if (tx.sta) | |
1534 | *sta = &tx.sta->sta; | |
1535 | else | |
1536 | *sta = NULL; | |
1537 | } | |
1538 | ||
88724a81 JB |
1539 | /* this function isn't suitable for fragmented data frames */ |
1540 | skb2 = __skb_dequeue(&tx.skbs); | |
1541 | if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) { | |
1542 | ieee80211_free_txskb(hw, skb2); | |
1543 | ieee80211_purge_tx_queue(hw, &tx.skbs); | |
1544 | return false; | |
1545 | } | |
1546 | ||
06be6b14 FF |
1547 | return true; |
1548 | } | |
1549 | EXPORT_SYMBOL(ieee80211_tx_prepare_skb); | |
1550 | ||
7bb45683 JB |
1551 | /* |
1552 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1553 | */ | |
1554 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
7c10770f JB |
1555 | struct sta_info *sta, struct sk_buff *skb, |
1556 | bool txpending) | |
e2ebc74d | 1557 | { |
3b8d81e0 | 1558 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1559 | struct ieee80211_tx_data tx; |
97b045d6 | 1560 | ieee80211_tx_result res_prepare; |
e039fa4a | 1561 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1562 | bool result = true; |
74e4dbfd | 1563 | int led_len; |
e2ebc74d | 1564 | |
e2ebc74d JB |
1565 | if (unlikely(skb->len < 10)) { |
1566 | dev_kfree_skb(skb); | |
7bb45683 | 1567 | return true; |
e2ebc74d JB |
1568 | } |
1569 | ||
58d4185e | 1570 | /* initialises tx */ |
74e4dbfd | 1571 | led_len = skb->len; |
7c10770f | 1572 | res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb); |
e2ebc74d | 1573 | |
cd8ffc80 | 1574 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1575 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1576 | return true; |
cd8ffc80 | 1577 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1578 | return true; |
e2ebc74d JB |
1579 | } |
1580 | ||
3a25a8c8 JB |
1581 | /* set up hw_queue value early */ |
1582 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1583 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1584 | info->hw_queue = | |
1585 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1586 | ||
7bb45683 | 1587 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1588 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1589 | tx.sta, txpending); | |
55de908a | 1590 | |
7bb45683 | 1591 | return result; |
e2ebc74d JB |
1592 | } |
1593 | ||
1594 | /* device xmit handlers */ | |
1595 | ||
3bff1865 | 1596 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1597 | struct sk_buff *skb, |
1598 | int head_need, bool may_encrypt) | |
1599 | { | |
3bff1865 | 1600 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1601 | int tail_need = 0; |
1602 | ||
3bff1865 | 1603 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1604 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1605 | tail_need -= skb_tailroom(skb); | |
1606 | tail_need = max_t(int, tail_need, 0); | |
1607 | } | |
1608 | ||
c70f59a2 IY |
1609 | if (skb_cloned(skb) && |
1610 | (!(local->hw.flags & IEEE80211_HW_SUPPORTS_CLONED_SKBS) || | |
1611 | !skb_clone_writable(skb, ETH_HLEN) || | |
17c18bf8 | 1612 | (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt))) |
23c0752a | 1613 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1614 | else if (head_need || tail_need) |
23c0752a | 1615 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1616 | else |
1617 | return 0; | |
23c0752a JB |
1618 | |
1619 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1620 | wiphy_debug(local->hw.wiphy, |
1621 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1622 | return -ENOMEM; |
1623 | } | |
1624 | ||
23c0752a JB |
1625 | return 0; |
1626 | } | |
1627 | ||
7c10770f JB |
1628 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1629 | struct sta_info *sta, struct sk_buff *skb) | |
e2ebc74d | 1630 | { |
3b8d81e0 | 1631 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1632 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1633 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1634 | int headroom; |
23c0752a | 1635 | bool may_encrypt; |
e2ebc74d | 1636 | |
3b8d81e0 | 1637 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1638 | |
3b8d81e0 | 1639 | headroom = local->tx_headroom; |
23c0752a | 1640 | if (may_encrypt) |
2475b1cc | 1641 | headroom += sdata->encrypt_headroom; |
23c0752a JB |
1642 | headroom -= skb_headroom(skb); |
1643 | headroom = max_t(int, 0, headroom); | |
1644 | ||
3bff1865 | 1645 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1646 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1647 | return; |
e2ebc74d JB |
1648 | } |
1649 | ||
740c1aa3 | 1650 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1651 | info->control.vif = &sdata->vif; |
e2ebc74d | 1652 | |
3f52b7e3 MP |
1653 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1654 | if (ieee80211_is_data(hdr->frame_control) && | |
1655 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1656 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1657 | return; /* skb queued: don't free */ |
1658 | } else { | |
1659 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1660 | } | |
98aed9fd | 1661 | } |
cca89496 | 1662 | |
2154c81c | 1663 | ieee80211_set_qos_hdr(sdata, skb); |
7c10770f | 1664 | ieee80211_tx(sdata, sta, skb, false); |
e2ebc74d JB |
1665 | } |
1666 | ||
73b9f03a JB |
1667 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1668 | { | |
1669 | struct ieee80211_radiotap_iterator iterator; | |
1670 | struct ieee80211_radiotap_header *rthdr = | |
1671 | (struct ieee80211_radiotap_header *) skb->data; | |
1672 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1673 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1674 | NULL); | |
1675 | u16 txflags; | |
1676 | ||
1677 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1678 | IEEE80211_TX_CTL_DONTFRAG; | |
1679 | ||
1680 | /* | |
1681 | * for every radiotap entry that is present | |
1682 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1683 | * entries present, or -EINVAL on error) | |
1684 | */ | |
1685 | ||
1686 | while (!ret) { | |
1687 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1688 | ||
1689 | if (ret) | |
1690 | continue; | |
1691 | ||
1692 | /* see if this argument is something we can use */ | |
1693 | switch (iterator.this_arg_index) { | |
1694 | /* | |
1695 | * You must take care when dereferencing iterator.this_arg | |
1696 | * for multibyte types... the pointer is not aligned. Use | |
1697 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1698 | * iterator.this_arg for type "type" safely on all arches. | |
1699 | */ | |
1700 | case IEEE80211_RADIOTAP_FLAGS: | |
1701 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1702 | /* | |
1703 | * this indicates that the skb we have been | |
1704 | * handed has the 32-bit FCS CRC at the end... | |
1705 | * we should react to that by snipping it off | |
1706 | * because it will be recomputed and added | |
1707 | * on transmission | |
1708 | */ | |
1709 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1710 | return false; | |
1711 | ||
1712 | skb_trim(skb, skb->len - FCS_LEN); | |
1713 | } | |
1714 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1715 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1716 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1717 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1718 | break; | |
1719 | ||
1720 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1721 | txflags = get_unaligned_le16(iterator.this_arg); | |
1722 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1723 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1724 | break; | |
1725 | ||
1726 | /* | |
1727 | * Please update the file | |
1728 | * Documentation/networking/mac80211-injection.txt | |
1729 | * when parsing new fields here. | |
1730 | */ | |
1731 | ||
1732 | default: | |
1733 | break; | |
1734 | } | |
1735 | } | |
1736 | ||
1737 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1738 | return false; | |
1739 | ||
1740 | /* | |
1741 | * remove the radiotap header | |
1742 | * iterator->_max_length was sanity-checked against | |
1743 | * skb->len by iterator init | |
1744 | */ | |
1745 | skb_pull(skb, iterator._max_length); | |
1746 | ||
1747 | return true; | |
1748 | } | |
1749 | ||
d0cf9c0d SH |
1750 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1751 | struct net_device *dev) | |
e2ebc74d JB |
1752 | { |
1753 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a | 1754 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d JB |
1755 | struct ieee80211_radiotap_header *prthdr = |
1756 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1757 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1758 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1759 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
b4932836 | 1760 | struct cfg80211_chan_def *chandef; |
9b8a74e3 | 1761 | u16 len_rthdr; |
5d9cf4a5 | 1762 | int hdrlen; |
e2ebc74d | 1763 | |
9b8a74e3 AG |
1764 | /* check for not even having the fixed radiotap header part */ |
1765 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1766 | goto fail; /* too short to be possibly valid */ | |
1767 | ||
1768 | /* is it a header version we can trust to find length from? */ | |
1769 | if (unlikely(prthdr->it_version)) | |
1770 | goto fail; /* only version 0 is supported */ | |
1771 | ||
1772 | /* then there must be a radiotap header with a length we can use */ | |
1773 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1774 | ||
1775 | /* does the skb contain enough to deliver on the alleged length? */ | |
1776 | if (unlikely(skb->len < len_rthdr)) | |
1777 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1778 | |
e2ebc74d JB |
1779 | /* |
1780 | * fix up the pointers accounting for the radiotap | |
1781 | * header still being in there. We are being given | |
1782 | * a precooked IEEE80211 header so no need for | |
1783 | * normal processing | |
1784 | */ | |
9b8a74e3 | 1785 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1786 | /* |
9b8a74e3 AG |
1787 | * these are just fixed to the end of the rt area since we |
1788 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1789 | */ |
9b8a74e3 AG |
1790 | skb_set_network_header(skb, len_rthdr); |
1791 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1792 | |
5d9cf4a5 JB |
1793 | if (skb->len < len_rthdr + 2) |
1794 | goto fail; | |
1795 | ||
1796 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1797 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1798 | ||
1799 | if (skb->len < len_rthdr + hdrlen) | |
1800 | goto fail; | |
1801 | ||
f75f5c6f HS |
1802 | /* |
1803 | * Initialize skb->protocol if the injected frame is a data frame | |
1804 | * carrying a rfc1042 header | |
1805 | */ | |
5d9cf4a5 JB |
1806 | if (ieee80211_is_data(hdr->frame_control) && |
1807 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1808 | u8 *payload = (u8 *)hdr + hdrlen; | |
1809 | ||
b203ca39 | 1810 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1811 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1812 | payload[7]); | |
f75f5c6f HS |
1813 | } |
1814 | ||
3b8d81e0 JB |
1815 | memset(info, 0, sizeof(*info)); |
1816 | ||
5d9cf4a5 | 1817 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1818 | IEEE80211_TX_CTL_INJECTED; |
1819 | ||
1820 | /* process and remove the injection radiotap header */ | |
1821 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1822 | goto fail; | |
5d9cf4a5 JB |
1823 | |
1824 | rcu_read_lock(); | |
1825 | ||
1826 | /* | |
1827 | * We process outgoing injected frames that have a local address | |
1828 | * we handle as though they are non-injected frames. | |
1829 | * This code here isn't entirely correct, the local MAC address | |
1830 | * isn't always enough to find the interface to use; for proper | |
1831 | * VLAN/WDS support we will need a different mechanism (which | |
1832 | * likely isn't going to be monitor interfaces). | |
1833 | */ | |
1834 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1835 | ||
1836 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1837 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1838 | continue; | |
1839 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1840 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1841 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1842 | continue; | |
b203ca39 | 1843 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1844 | sdata = tmp_sdata; |
1845 | break; | |
1846 | } | |
1847 | } | |
7351c6bd | 1848 | |
55de908a JB |
1849 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1850 | if (!chanctx_conf) { | |
1851 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1852 | if (tmp_sdata) | |
1853 | chanctx_conf = | |
1854 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1855 | } | |
55de908a | 1856 | |
b4a7ff75 | 1857 | if (chanctx_conf) |
b4932836 | 1858 | chandef = &chanctx_conf->def; |
b4a7ff75 | 1859 | else if (!local->use_chanctx) |
b4932836 | 1860 | chandef = &local->_oper_chandef; |
b4a7ff75 FF |
1861 | else |
1862 | goto fail_rcu; | |
55de908a JB |
1863 | |
1864 | /* | |
1865 | * Frame injection is not allowed if beaconing is not allowed | |
1866 | * or if we need radar detection. Beaconing is usually not allowed when | |
1867 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1868 | * Passive scan is also used in world regulatory domains where | |
1869 | * your country is not known and as such it should be treated as | |
1870 | * NO TX unless the channel is explicitly allowed in which case | |
1871 | * your current regulatory domain would not have the passive scan | |
1872 | * flag. | |
1873 | * | |
1874 | * Since AP mode uses monitor interfaces to inject/TX management | |
1875 | * frames we can make AP mode the exception to this rule once it | |
1876 | * supports radar detection as its implementation can deal with | |
1877 | * radar detection by itself. We can do that later by adding a | |
1878 | * monitor flag interfaces used for AP support. | |
1879 | */ | |
b4932836 JD |
1880 | if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef, |
1881 | sdata->vif.type)) | |
55de908a JB |
1882 | goto fail_rcu; |
1883 | ||
73c4e195 | 1884 | info->band = chandef->chan->band; |
7c10770f | 1885 | ieee80211_xmit(sdata, NULL, skb); |
5d9cf4a5 JB |
1886 | rcu_read_unlock(); |
1887 | ||
e2ebc74d | 1888 | return NETDEV_TX_OK; |
9b8a74e3 | 1889 | |
55de908a JB |
1890 | fail_rcu: |
1891 | rcu_read_unlock(); | |
9b8a74e3 AG |
1892 | fail: |
1893 | dev_kfree_skb(skb); | |
1894 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1895 | } |
1896 | ||
97ffe757 | 1897 | static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb) |
ad38bfc9 | 1898 | { |
97ffe757 | 1899 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; |
ad38bfc9 | 1900 | |
97ffe757 JB |
1901 | return ethertype == ETH_P_TDLS && |
1902 | skb->len > 14 && | |
1903 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE; | |
1904 | } | |
1905 | ||
1906 | static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata, | |
1907 | struct sk_buff *skb, | |
1908 | struct sta_info **sta_out) | |
1909 | { | |
1910 | struct sta_info *sta; | |
1911 | ||
1912 | switch (sdata->vif.type) { | |
1913 | case NL80211_IFTYPE_AP_VLAN: | |
1914 | sta = rcu_dereference(sdata->u.vlan.sta); | |
1915 | if (sta) { | |
1916 | *sta_out = sta; | |
1917 | return 0; | |
1918 | } else if (sdata->wdev.use_4addr) { | |
1919 | return -ENOLINK; | |
1920 | } | |
1921 | /* fall through */ | |
1922 | case NL80211_IFTYPE_AP: | |
1923 | case NL80211_IFTYPE_OCB: | |
1924 | case NL80211_IFTYPE_ADHOC: | |
1925 | if (is_multicast_ether_addr(skb->data)) { | |
1926 | *sta_out = ERR_PTR(-ENOENT); | |
1927 | return 0; | |
1928 | } | |
1929 | sta = sta_info_get_bss(sdata, skb->data); | |
1930 | break; | |
1931 | case NL80211_IFTYPE_WDS: | |
1932 | sta = sta_info_get(sdata, sdata->u.wds.remote_addr); | |
1933 | break; | |
1934 | #ifdef CONFIG_MAC80211_MESH | |
1935 | case NL80211_IFTYPE_MESH_POINT: | |
1936 | /* determined much later */ | |
1937 | *sta_out = NULL; | |
1938 | return 0; | |
1939 | #endif | |
1940 | case NL80211_IFTYPE_STATION: | |
1941 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { | |
1942 | sta = sta_info_get(sdata, skb->data); | |
1943 | if (sta) { | |
1944 | bool tdls_peer, tdls_auth; | |
1945 | ||
1946 | tdls_peer = test_sta_flag(sta, | |
1947 | WLAN_STA_TDLS_PEER); | |
1948 | tdls_auth = test_sta_flag(sta, | |
1949 | WLAN_STA_TDLS_PEER_AUTH); | |
1950 | ||
1951 | if (tdls_peer && tdls_auth) { | |
1952 | *sta_out = sta; | |
1953 | return 0; | |
1954 | } | |
1955 | ||
1956 | /* | |
1957 | * TDLS link during setup - throw out frames to | |
1958 | * peer. Allow TDLS-setup frames to unauthorized | |
1959 | * peers for the special case of a link teardown | |
1960 | * after a TDLS sta is removed due to being | |
1961 | * unreachable. | |
1962 | */ | |
1963 | if (tdls_peer && !tdls_auth && | |
1964 | !ieee80211_is_tdls_setup(skb)) | |
1965 | return -EINVAL; | |
1966 | } | |
1967 | ||
1968 | } | |
1969 | ||
1970 | sta = sta_info_get(sdata, sdata->u.mgd.bssid); | |
1971 | if (!sta) | |
1972 | return -ENOLINK; | |
1973 | break; | |
1974 | default: | |
1975 | return -EINVAL; | |
1976 | } | |
1977 | ||
1978 | *sta_out = sta ?: ERR_PTR(-ENOENT); | |
1979 | return 0; | |
ad38bfc9 MG |
1980 | } |
1981 | ||
e2ebc74d | 1982 | /** |
4c9451ed JB |
1983 | * ieee80211_build_hdr - build 802.11 header in the given frame |
1984 | * @sdata: virtual interface to build the header for | |
1985 | * @skb: the skb to build the header in | |
24d342c5 | 1986 | * @info_flags: skb flags to set |
e2ebc74d | 1987 | * |
4c9451ed JB |
1988 | * This function takes the skb with 802.3 header and reformats the header to |
1989 | * the appropriate IEEE 802.11 header based on which interface the packet is | |
1990 | * being transmitted on. | |
1991 | * | |
1992 | * Note that this function also takes care of the TX status request and | |
1993 | * potential unsharing of the SKB - this needs to be interleaved with the | |
1994 | * header building. | |
e2ebc74d | 1995 | * |
4c9451ed JB |
1996 | * The function requires the read-side RCU lock held |
1997 | * | |
1998 | * Returns: the (possibly reallocated) skb or an ERR_PTR() code | |
e2ebc74d | 1999 | */ |
4c9451ed | 2000 | static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata, |
7c10770f | 2001 | struct sk_buff *skb, u32 info_flags, |
97ffe757 | 2002 | struct sta_info *sta) |
e2ebc74d | 2003 | { |
133b8226 | 2004 | struct ieee80211_local *local = sdata->local; |
489ee919 | 2005 | struct ieee80211_tx_info *info; |
dcf33963 | 2006 | int head_need; |
065e9605 HH |
2007 | u16 ethertype, hdrlen, meshhdrlen = 0; |
2008 | __le16 fc; | |
e2ebc74d | 2009 | struct ieee80211_hdr hdr; |
ff67bb86 | 2010 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 2011 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
2012 | const u8 *encaps_data; |
2013 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 2014 | int nh_pos, h_pos; |
97ffe757 JB |
2015 | bool wme_sta = false, authorized = false; |
2016 | bool tdls_peer; | |
a729cff8 | 2017 | bool multicast; |
a729cff8 | 2018 | u16 info_id = 0; |
55de908a JB |
2019 | struct ieee80211_chanctx_conf *chanctx_conf; |
2020 | struct ieee80211_sub_if_data *ap_sdata; | |
2021 | enum ieee80211_band band; | |
4c9451ed | 2022 | int ret; |
e2ebc74d | 2023 | |
97ffe757 JB |
2024 | if (IS_ERR(sta)) |
2025 | sta = NULL; | |
2026 | ||
e2ebc74d JB |
2027 | /* convert Ethernet header to proper 802.11 header (based on |
2028 | * operation mode) */ | |
2029 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 2030 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 2031 | |
51fb61e7 | 2032 | switch (sdata->vif.type) { |
05c914fe | 2033 | case NL80211_IFTYPE_AP_VLAN: |
97ffe757 | 2034 | if (sdata->wdev.use_4addr) { |
f14543ee FF |
2035 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
2036 | /* RA TA DA SA */ | |
2037 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 2038 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2039 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2040 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2041 | hdrlen = 30; | |
c2c98fde | 2042 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
a74a8c84 | 2043 | wme_sta = sta->sta.wme; |
f14543ee | 2044 | } |
55de908a JB |
2045 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
2046 | u.ap); | |
2047 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
4c9451ed JB |
2048 | if (!chanctx_conf) { |
2049 | ret = -ENOTCONN; | |
2050 | goto free; | |
2051 | } | |
4bf88530 | 2052 | band = chanctx_conf->def.chan->band; |
97ffe757 | 2053 | if (sdata->wdev.use_4addr) |
f14543ee FF |
2054 | break; |
2055 | /* fall through */ | |
2056 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
2057 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
2058 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2059 | if (!chanctx_conf) { |
2060 | ret = -ENOTCONN; | |
2061 | goto free; | |
2062 | } | |
065e9605 | 2063 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
2064 | /* DA BSSID SA */ |
2065 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 2066 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2067 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
2068 | hdrlen = 24; | |
4bf88530 | 2069 | band = chanctx_conf->def.chan->band; |
cf966838 | 2070 | break; |
05c914fe | 2071 | case NL80211_IFTYPE_WDS: |
065e9605 | 2072 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
2073 | /* RA TA DA SA */ |
2074 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 2075 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
2076 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2077 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2078 | hdrlen = 30; | |
55de908a JB |
2079 | /* |
2080 | * This is the exception! WDS style interfaces are prohibited | |
2081 | * when channel contexts are in used so this must be valid | |
2082 | */ | |
675a0b04 | 2083 | band = local->hw.conf.chandef.chan->band; |
cf966838 | 2084 | break; |
33b64eb2 | 2085 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 2086 | case NL80211_IFTYPE_MESH_POINT: |
b8bacc18 | 2087 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
2088 | struct sta_info *next_hop; |
2089 | bool mpp_lookup = true; | |
2090 | ||
bf7cd94d | 2091 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
2092 | if (mpath) { |
2093 | mpp_lookup = false; | |
2094 | next_hop = rcu_dereference(mpath->next_hop); | |
2095 | if (!next_hop || | |
2096 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
2097 | MESH_PATH_RESOLVING))) | |
2098 | mpp_lookup = true; | |
2099 | } | |
2100 | ||
2101 | if (mpp_lookup) | |
bf7cd94d | 2102 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
2103 | |
2104 | if (mppath && mpath) | |
2105 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 2106 | } |
79617dee | 2107 | |
f76b57b4 | 2108 | /* |
9d52501b JF |
2109 | * Use address extension if it is a packet from |
2110 | * another interface or if we know the destination | |
2111 | * is being proxied by a portal (i.e. portal address | |
2112 | * differs from proxied address) | |
f76b57b4 | 2113 | */ |
b203ca39 JP |
2114 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
2115 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
2116 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
2117 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
2118 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
2119 | NULL, NULL); | |
79617dee | 2120 | } else { |
27f01124 TP |
2121 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
2122 | * For unicast with unknown forwarding information, | |
2123 | * destination might be in the MBSS or if that fails | |
2124 | * forwarded to another mesh gate. In either case | |
2125 | * resolution will be handled in ieee80211_xmit(), so | |
2126 | * leave the original DA. This also works for mcast */ | |
2127 | const u8 *mesh_da = skb->data; | |
2128 | ||
2129 | if (mppath) | |
2130 | mesh_da = mppath->mpp; | |
2131 | else if (mpath) | |
2132 | mesh_da = mpath->dst; | |
79617dee | 2133 | |
3c5772a5 | 2134 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 2135 | mesh_da, sdata->vif.addr); |
27f01124 TP |
2136 | if (is_multicast_ether_addr(mesh_da)) |
2137 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
2138 | meshhdrlen = ieee80211_new_mesh_header( |
2139 | sdata, &mesh_hdr, | |
2140 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 2141 | else |
27f01124 | 2142 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
2143 | meshhdrlen = ieee80211_new_mesh_header( |
2144 | sdata, &mesh_hdr, skb->data, | |
2145 | skb->data + ETH_ALEN); | |
79617dee | 2146 | |
79617dee | 2147 | } |
55de908a | 2148 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2149 | if (!chanctx_conf) { |
2150 | ret = -ENOTCONN; | |
2151 | goto free; | |
2152 | } | |
4bf88530 | 2153 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
2154 | break; |
2155 | #endif | |
05c914fe | 2156 | case NL80211_IFTYPE_STATION: |
97ffe757 JB |
2157 | /* we already did checks when looking up the RA STA */ |
2158 | tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER); | |
941c93cd | 2159 | |
97ffe757 | 2160 | if (tdls_peer) { |
941c93cd AN |
2161 | /* DA SA BSSID */ |
2162 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2163 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2164 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2165 | hdrlen = 24; | |
2166 | } else if (sdata->u.mgd.use_4addr && | |
2167 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
2168 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2169 | IEEE80211_FCTL_TODS); | |
f14543ee | 2170 | /* RA TA DA SA */ |
941c93cd | 2171 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 2172 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
2173 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
2174 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
2175 | hdrlen = 30; | |
2176 | } else { | |
2177 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2178 | /* BSSID SA DA */ | |
941c93cd | 2179 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
2180 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
2181 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
2182 | hdrlen = 24; | |
2183 | } | |
55de908a | 2184 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2185 | if (!chanctx_conf) { |
2186 | ret = -ENOTCONN; | |
2187 | goto free; | |
2188 | } | |
4bf88530 | 2189 | band = chanctx_conf->def.chan->band; |
cf966838 | 2190 | break; |
239281f8 RL |
2191 | case NL80211_IFTYPE_OCB: |
2192 | /* DA SA BSSID */ | |
2193 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2194 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
2195 | eth_broadcast_addr(hdr.addr3); | |
2196 | hdrlen = 24; | |
2197 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
4c9451ed JB |
2198 | if (!chanctx_conf) { |
2199 | ret = -ENOTCONN; | |
2200 | goto free; | |
2201 | } | |
239281f8 RL |
2202 | band = chanctx_conf->def.chan->band; |
2203 | break; | |
05c914fe | 2204 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
2205 | /* DA SA BSSID */ |
2206 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
2207 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 2208 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 2209 | hdrlen = 24; |
55de908a | 2210 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
4c9451ed JB |
2211 | if (!chanctx_conf) { |
2212 | ret = -ENOTCONN; | |
2213 | goto free; | |
2214 | } | |
4bf88530 | 2215 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
2216 | break; |
2217 | default: | |
4c9451ed JB |
2218 | ret = -EINVAL; |
2219 | goto free; | |
e2ebc74d JB |
2220 | } |
2221 | ||
a729cff8 | 2222 | multicast = is_multicast_ether_addr(hdr.addr1); |
e2ebc74d | 2223 | |
97ffe757 JB |
2224 | /* sta is always NULL for mesh */ |
2225 | if (sta) { | |
2226 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2227 | wme_sta = sta->sta.wme; | |
2228 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { | |
2229 | /* For mesh, the use of the QoS header is mandatory */ | |
c2c98fde | 2230 | wme_sta = true; |
97ffe757 | 2231 | } |
4777be41 | 2232 | |
527871d7 JB |
2233 | /* receiver does QoS (which also means we do) use it */ |
2234 | if (wme_sta) { | |
065e9605 | 2235 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2236 | hdrlen += 2; |
2237 | } | |
2238 | ||
2239 | /* | |
238814fd JB |
2240 | * Drop unicast frames to unauthorised stations unless they are |
2241 | * EAPOL frames from the local station. | |
ce3edf6d | 2242 | */ |
55182e4a | 2243 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
239281f8 | 2244 | (sdata->vif.type != NL80211_IFTYPE_OCB) && |
a6ececf4 | 2245 | !multicast && !authorized && |
55182e4a | 2246 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || |
b203ca39 | 2247 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2248 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2249 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
4c9451ed | 2250 | sdata->name, hdr.addr1); |
ce3edf6d JB |
2251 | #endif |
2252 | ||
2253 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2254 | ||
4c9451ed JB |
2255 | ret = -EPERM; |
2256 | goto free; | |
ce3edf6d JB |
2257 | } |
2258 | ||
a729cff8 JB |
2259 | if (unlikely(!multicast && skb->sk && |
2260 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
bf7fa551 | 2261 | struct sk_buff *ack_skb = skb_clone_sk(skb); |
a729cff8 | 2262 | |
bf7fa551 | 2263 | if (ack_skb) { |
a729cff8 | 2264 | unsigned long flags; |
9475af6e | 2265 | int id; |
a729cff8 JB |
2266 | |
2267 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
bf7fa551 | 2268 | id = idr_alloc(&local->ack_status_frames, ack_skb, |
9475af6e | 2269 | 1, 0x10000, GFP_ATOMIC); |
a729cff8 JB |
2270 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2271 | ||
9475af6e | 2272 | if (id >= 0) { |
a729cff8 JB |
2273 | info_id = id; |
2274 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
a729cff8 | 2275 | } else { |
bf7fa551 | 2276 | kfree_skb(ack_skb); |
a729cff8 | 2277 | } |
a729cff8 JB |
2278 | } |
2279 | } | |
2280 | ||
7e244707 HS |
2281 | /* |
2282 | * If the skb is shared we need to obtain our own copy. | |
2283 | */ | |
2284 | if (skb_shared(skb)) { | |
a729cff8 JB |
2285 | struct sk_buff *tmp_skb = skb; |
2286 | ||
2287 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2288 | WARN_ON(info_id); | |
2289 | ||
f8a0a781 | 2290 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2291 | kfree_skb(tmp_skb); |
2292 | ||
4c9451ed JB |
2293 | if (!skb) { |
2294 | ret = -ENOMEM; | |
2295 | goto free; | |
2296 | } | |
7e244707 HS |
2297 | } |
2298 | ||
065e9605 | 2299 | hdr.frame_control = fc; |
e2ebc74d JB |
2300 | hdr.duration_id = 0; |
2301 | hdr.seq_ctrl = 0; | |
2302 | ||
2303 | skip_header_bytes = ETH_HLEN; | |
2304 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2305 | encaps_data = bridge_tunnel_header; | |
2306 | encaps_len = sizeof(bridge_tunnel_header); | |
2307 | skip_header_bytes -= 2; | |
e5c5d22e | 2308 | } else if (ethertype >= ETH_P_802_3_MIN) { |
e2ebc74d JB |
2309 | encaps_data = rfc1042_header; |
2310 | encaps_len = sizeof(rfc1042_header); | |
2311 | skip_header_bytes -= 2; | |
2312 | } else { | |
2313 | encaps_data = NULL; | |
2314 | encaps_len = 0; | |
2315 | } | |
2316 | ||
7e244707 HS |
2317 | nh_pos = skb_network_header(skb) - skb->data; |
2318 | h_pos = skb_transport_header(skb) - skb->data; | |
2319 | ||
e2ebc74d JB |
2320 | skb_pull(skb, skip_header_bytes); |
2321 | nh_pos -= skip_header_bytes; | |
2322 | h_pos -= skip_header_bytes; | |
2323 | ||
23c0752a | 2324 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2325 | |
23c0752a JB |
2326 | /* |
2327 | * So we need to modify the skb header and hence need a copy of | |
2328 | * that. The head_need variable above doesn't, so far, include | |
2329 | * the needed header space that we don't need right away. If we | |
2330 | * can, then we don't reallocate right now but only after the | |
2331 | * frame arrives at the master device (if it does...) | |
2332 | * | |
2333 | * If we cannot, however, then we will reallocate to include all | |
2334 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2335 | * make it big enough for everything we may ever need. | |
2336 | */ | |
e2ebc74d | 2337 | |
3a5be7d4 | 2338 | if (head_need > 0 || skb_cloned(skb)) { |
2475b1cc | 2339 | head_need += sdata->encrypt_headroom; |
23c0752a JB |
2340 | head_need += local->tx_headroom; |
2341 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2342 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2343 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2344 | skb = NULL; |
4c9451ed | 2345 | return ERR_PTR(-ENOMEM); |
c3e7724b | 2346 | } |
e2ebc74d JB |
2347 | } |
2348 | ||
2349 | if (encaps_data) { | |
2350 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2351 | nh_pos += encaps_len; | |
2352 | h_pos += encaps_len; | |
2353 | } | |
c29b9b9b | 2354 | |
e4ab7eb0 | 2355 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2356 | if (meshhdrlen > 0) { |
2357 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2358 | nh_pos += meshhdrlen; | |
2359 | h_pos += meshhdrlen; | |
2360 | } | |
e4ab7eb0 | 2361 | #endif |
33b64eb2 | 2362 | |
065e9605 | 2363 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2364 | __le16 *qos_control; |
2365 | ||
f359d3fe | 2366 | qos_control = (__le16 *) skb_push(skb, 2); |
c29b9b9b JB |
2367 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); |
2368 | /* | |
2369 | * Maybe we could actually set some fields here, for now just | |
2370 | * initialise to zero to indicate no special operation. | |
2371 | */ | |
2372 | *qos_control = 0; | |
2373 | } else | |
2374 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2375 | ||
e2ebc74d JB |
2376 | nh_pos += hdrlen; |
2377 | h_pos += hdrlen; | |
2378 | ||
e2ebc74d JB |
2379 | /* Update skb pointers to various headers since this modified frame |
2380 | * is going to go through Linux networking code that may potentially | |
2381 | * need things like pointer to IP header. */ | |
2382 | skb_set_mac_header(skb, 0); | |
2383 | skb_set_network_header(skb, nh_pos); | |
2384 | skb_set_transport_header(skb, h_pos); | |
2385 | ||
489ee919 | 2386 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2387 | memset(info, 0, sizeof(*info)); |
2388 | ||
a729cff8 JB |
2389 | info->flags = info_flags; |
2390 | info->ack_frame_id = info_id; | |
73c4e195 | 2391 | info->band = band; |
a729cff8 | 2392 | |
4c9451ed JB |
2393 | return skb; |
2394 | free: | |
2395 | kfree_skb(skb); | |
2396 | return ERR_PTR(ret); | |
2397 | } | |
2398 | ||
17c18bf8 JB |
2399 | /* |
2400 | * fast-xmit overview | |
2401 | * | |
2402 | * The core idea of this fast-xmit is to remove per-packet checks by checking | |
2403 | * them out of band. ieee80211_check_fast_xmit() implements the out-of-band | |
2404 | * checks that are needed to get the sta->fast_tx pointer assigned, after which | |
2405 | * much less work can be done per packet. For example, fragmentation must be | |
2406 | * disabled or the fast_tx pointer will not be set. All the conditions are seen | |
2407 | * in the code here. | |
2408 | * | |
2409 | * Once assigned, the fast_tx data structure also caches the per-packet 802.11 | |
2410 | * header and other data to aid packet processing in ieee80211_xmit_fast(). | |
2411 | * | |
2412 | * The most difficult part of this is that when any of these assumptions | |
2413 | * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(), | |
2414 | * ieee80211_check_fast_xmit() or friends) is required to reset the data, | |
2415 | * since the per-packet code no longer checks the conditions. This is reflected | |
2416 | * by the calls to these functions throughout the rest of the code, and must be | |
2417 | * maintained if any of the TX path checks change. | |
2418 | */ | |
2419 | ||
2420 | void ieee80211_check_fast_xmit(struct sta_info *sta) | |
2421 | { | |
2422 | struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old; | |
2423 | struct ieee80211_local *local = sta->local; | |
2424 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
2425 | struct ieee80211_hdr *hdr = (void *)build.hdr; | |
2426 | struct ieee80211_chanctx_conf *chanctx_conf; | |
2427 | __le16 fc; | |
2428 | ||
2429 | if (!(local->hw.flags & IEEE80211_HW_SUPPORT_FAST_XMIT)) | |
2430 | return; | |
2431 | ||
2432 | /* Locking here protects both the pointer itself, and against concurrent | |
2433 | * invocations winning data access races to, e.g., the key pointer that | |
2434 | * is used. | |
2435 | * Without it, the invocation of this function right after the key | |
2436 | * pointer changes wouldn't be sufficient, as another CPU could access | |
2437 | * the pointer, then stall, and then do the cache update after the CPU | |
2438 | * that invalidated the key. | |
2439 | * With the locking, such scenarios cannot happen as the check for the | |
2440 | * key and the fast-tx assignment are done atomically, so the CPU that | |
2441 | * modifies the key will either wait or other one will see the key | |
2442 | * cleared/changed already. | |
2443 | */ | |
2444 | spin_lock_bh(&sta->lock); | |
2445 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS && | |
2446 | !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) && | |
2447 | sdata->vif.type == NL80211_IFTYPE_STATION) | |
2448 | goto out; | |
2449 | ||
2450 | if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
2451 | goto out; | |
2452 | ||
2453 | if (test_sta_flag(sta, WLAN_STA_PS_STA) || | |
2454 | test_sta_flag(sta, WLAN_STA_PS_DRIVER) || | |
2455 | test_sta_flag(sta, WLAN_STA_PS_DELIVER)) | |
2456 | goto out; | |
2457 | ||
2458 | if (sdata->noack_map) | |
2459 | goto out; | |
2460 | ||
2461 | /* fast-xmit doesn't handle fragmentation at all */ | |
725b812c JB |
2462 | if (local->hw.wiphy->frag_threshold != (u32)-1 && |
2463 | !local->ops->set_frag_threshold) | |
17c18bf8 JB |
2464 | goto out; |
2465 | ||
2466 | rcu_read_lock(); | |
2467 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
2468 | if (!chanctx_conf) { | |
2469 | rcu_read_unlock(); | |
2470 | goto out; | |
2471 | } | |
2472 | build.band = chanctx_conf->def.chan->band; | |
2473 | rcu_read_unlock(); | |
2474 | ||
2475 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); | |
2476 | ||
2477 | switch (sdata->vif.type) { | |
3ffd8840 JB |
2478 | case NL80211_IFTYPE_ADHOC: |
2479 | /* DA SA BSSID */ | |
2480 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2481 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2482 | memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN); | |
2483 | build.hdr_len = 24; | |
2484 | break; | |
17c18bf8 JB |
2485 | case NL80211_IFTYPE_STATION: |
2486 | if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) { | |
2487 | /* DA SA BSSID */ | |
2488 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2489 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2490 | memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
2491 | build.hdr_len = 24; | |
2492 | break; | |
2493 | } | |
2494 | ||
2495 | if (sdata->u.mgd.use_4addr) { | |
2496 | /* non-regular ethertype cannot use the fastpath */ | |
2497 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2498 | IEEE80211_FCTL_TODS); | |
2499 | /* RA TA DA SA */ | |
2500 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2501 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2502 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2503 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2504 | build.hdr_len = 30; | |
2505 | break; | |
2506 | } | |
2507 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
2508 | /* BSSID SA DA */ | |
2509 | memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN); | |
2510 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2511 | build.sa_offs = offsetof(struct ieee80211_hdr, addr2); | |
2512 | build.hdr_len = 24; | |
2513 | break; | |
2514 | case NL80211_IFTYPE_AP_VLAN: | |
2515 | if (sdata->wdev.use_4addr) { | |
2516 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
2517 | IEEE80211_FCTL_TODS); | |
2518 | /* RA TA DA SA */ | |
2519 | memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN); | |
2520 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2521 | build.da_offs = offsetof(struct ieee80211_hdr, addr3); | |
2522 | build.sa_offs = offsetof(struct ieee80211_hdr, addr4); | |
2523 | build.hdr_len = 30; | |
2524 | break; | |
2525 | } | |
2526 | /* fall through */ | |
2527 | case NL80211_IFTYPE_AP: | |
2528 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); | |
2529 | /* DA BSSID SA */ | |
2530 | build.da_offs = offsetof(struct ieee80211_hdr, addr1); | |
2531 | memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
2532 | build.sa_offs = offsetof(struct ieee80211_hdr, addr3); | |
2533 | build.hdr_len = 24; | |
2534 | break; | |
2535 | default: | |
2536 | /* not handled on fast-xmit */ | |
2537 | goto out; | |
2538 | } | |
2539 | ||
2540 | if (sta->sta.wme) { | |
2541 | build.hdr_len += 2; | |
2542 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); | |
2543 | } | |
2544 | ||
2545 | /* We store the key here so there's no point in using rcu_dereference() | |
2546 | * but that's fine because the code that changes the pointers will call | |
2547 | * this function after doing so. For a single CPU that would be enough, | |
2548 | * for multiple see the comment above. | |
2549 | */ | |
2550 | build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]); | |
2551 | if (!build.key) | |
2552 | build.key = rcu_access_pointer(sdata->default_unicast_key); | |
2553 | if (build.key) { | |
e495c247 | 2554 | bool gen_iv, iv_spc, mmic; |
17c18bf8 JB |
2555 | |
2556 | gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV; | |
2557 | iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE; | |
e495c247 | 2558 | mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC; |
17c18bf8 JB |
2559 | |
2560 | /* don't handle software crypto */ | |
2561 | if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) | |
2562 | goto out; | |
2563 | ||
2564 | switch (build.key->conf.cipher) { | |
2565 | case WLAN_CIPHER_SUITE_CCMP: | |
2566 | case WLAN_CIPHER_SUITE_CCMP_256: | |
2567 | /* add fixed key ID */ | |
2568 | if (gen_iv) { | |
2569 | (build.hdr + build.hdr_len)[3] = | |
2570 | 0x20 | (build.key->conf.keyidx << 6); | |
2571 | build.pn_offs = build.hdr_len; | |
2572 | } | |
2573 | if (gen_iv || iv_spc) | |
2574 | build.hdr_len += IEEE80211_CCMP_HDR_LEN; | |
2575 | break; | |
2576 | case WLAN_CIPHER_SUITE_GCMP: | |
2577 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2578 | /* add fixed key ID */ | |
2579 | if (gen_iv) { | |
2580 | (build.hdr + build.hdr_len)[3] = | |
2581 | 0x20 | (build.key->conf.keyidx << 6); | |
2582 | build.pn_offs = build.hdr_len; | |
2583 | } | |
2584 | if (gen_iv || iv_spc) | |
2585 | build.hdr_len += IEEE80211_GCMP_HDR_LEN; | |
2586 | break; | |
e495c247 JB |
2587 | case WLAN_CIPHER_SUITE_TKIP: |
2588 | /* cannot handle MMIC or IV generation in xmit-fast */ | |
2589 | if (mmic || gen_iv) | |
2590 | goto out; | |
2591 | if (iv_spc) | |
2592 | build.hdr_len += IEEE80211_TKIP_IV_LEN; | |
2593 | break; | |
2594 | case WLAN_CIPHER_SUITE_WEP40: | |
2595 | case WLAN_CIPHER_SUITE_WEP104: | |
2596 | /* cannot handle IV generation in fast-xmit */ | |
2597 | if (gen_iv) | |
2598 | goto out; | |
2599 | if (iv_spc) | |
2600 | build.hdr_len += IEEE80211_WEP_IV_LEN; | |
2601 | break; | |
2602 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
2603 | case WLAN_CIPHER_SUITE_BIP_CMAC_256: | |
2604 | case WLAN_CIPHER_SUITE_BIP_GMAC_128: | |
2605 | case WLAN_CIPHER_SUITE_BIP_GMAC_256: | |
2606 | WARN(1, | |
2607 | "management cipher suite 0x%x enabled for data\n", | |
2608 | build.key->conf.cipher); | |
17c18bf8 | 2609 | goto out; |
e495c247 JB |
2610 | default: |
2611 | /* we don't know how to generate IVs for this at all */ | |
2612 | if (WARN_ON(gen_iv)) | |
2613 | goto out; | |
2614 | /* pure hardware keys are OK, of course */ | |
2615 | if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME)) | |
2616 | break; | |
2617 | /* cipher scheme might require space allocation */ | |
2618 | if (iv_spc && | |
2619 | build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV) | |
2620 | goto out; | |
2621 | if (iv_spc) | |
2622 | build.hdr_len += build.key->conf.iv_len; | |
17c18bf8 JB |
2623 | } |
2624 | ||
2625 | fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
2626 | } | |
2627 | ||
2628 | hdr->frame_control = fc; | |
2629 | ||
2630 | memcpy(build.hdr + build.hdr_len, | |
2631 | rfc1042_header, sizeof(rfc1042_header)); | |
2632 | build.hdr_len += sizeof(rfc1042_header); | |
2633 | ||
2634 | fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC); | |
2635 | /* if the kmemdup fails, continue w/o fast_tx */ | |
2636 | if (!fast_tx) | |
2637 | goto out; | |
2638 | ||
2639 | out: | |
2640 | /* we might have raced against another call to this function */ | |
2641 | old = rcu_dereference_protected(sta->fast_tx, | |
2642 | lockdep_is_held(&sta->lock)); | |
2643 | rcu_assign_pointer(sta->fast_tx, fast_tx); | |
2644 | if (old) | |
2645 | kfree_rcu(old, rcu_head); | |
2646 | spin_unlock_bh(&sta->lock); | |
2647 | } | |
2648 | ||
2649 | void ieee80211_check_fast_xmit_all(struct ieee80211_local *local) | |
2650 | { | |
2651 | struct sta_info *sta; | |
2652 | ||
2653 | rcu_read_lock(); | |
2654 | list_for_each_entry_rcu(sta, &local->sta_list, list) | |
2655 | ieee80211_check_fast_xmit(sta); | |
2656 | rcu_read_unlock(); | |
2657 | } | |
2658 | ||
2659 | void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata) | |
2660 | { | |
2661 | struct ieee80211_local *local = sdata->local; | |
2662 | struct sta_info *sta; | |
2663 | ||
2664 | rcu_read_lock(); | |
2665 | ||
2666 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
2667 | if (sdata != sta->sdata && | |
2668 | (!sta->sdata->bss || sta->sdata->bss != sdata->bss)) | |
2669 | continue; | |
2670 | ieee80211_check_fast_xmit(sta); | |
2671 | } | |
2672 | ||
2673 | rcu_read_unlock(); | |
2674 | } | |
2675 | ||
2676 | void ieee80211_clear_fast_xmit(struct sta_info *sta) | |
2677 | { | |
2678 | struct ieee80211_fast_tx *fast_tx; | |
2679 | ||
2680 | spin_lock_bh(&sta->lock); | |
2681 | fast_tx = rcu_dereference_protected(sta->fast_tx, | |
2682 | lockdep_is_held(&sta->lock)); | |
2683 | RCU_INIT_POINTER(sta->fast_tx, NULL); | |
2684 | spin_unlock_bh(&sta->lock); | |
2685 | ||
2686 | if (fast_tx) | |
2687 | kfree_rcu(fast_tx, rcu_head); | |
2688 | } | |
2689 | ||
2690 | static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata, | |
2691 | struct net_device *dev, struct sta_info *sta, | |
2692 | struct ieee80211_fast_tx *fast_tx, | |
2693 | struct sk_buff *skb) | |
2694 | { | |
2695 | struct ieee80211_local *local = sdata->local; | |
2696 | u16 ethertype = (skb->data[12] << 8) | skb->data[13]; | |
2697 | int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2); | |
2698 | int hw_headroom = sdata->local->hw.extra_tx_headroom; | |
2699 | struct ethhdr eth; | |
2700 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2701 | struct ieee80211_hdr *hdr = (void *)fast_tx->hdr; | |
2702 | struct ieee80211_tx_data tx; | |
2703 | ieee80211_tx_result r; | |
2704 | struct tid_ampdu_tx *tid_tx = NULL; | |
2705 | u8 tid = IEEE80211_NUM_TIDS; | |
2706 | ||
2707 | /* control port protocol needs a lot of special handling */ | |
2708 | if (cpu_to_be16(ethertype) == sdata->control_port_protocol) | |
2709 | return false; | |
2710 | ||
2711 | /* only RFC 1042 SNAP */ | |
2712 | if (ethertype < ETH_P_802_3_MIN) | |
2713 | return false; | |
2714 | ||
2715 | /* don't handle TX status request here either */ | |
2716 | if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) | |
2717 | return false; | |
2718 | ||
2719 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
2720 | tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK; | |
2721 | tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); | |
2722 | if (tid_tx && | |
2723 | !test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) | |
2724 | return false; | |
2725 | } | |
2726 | ||
2727 | /* after this point (skb is modified) we cannot return false */ | |
2728 | ||
2729 | if (skb_shared(skb)) { | |
2730 | struct sk_buff *tmp_skb = skb; | |
2731 | ||
2732 | skb = skb_clone(skb, GFP_ATOMIC); | |
2733 | kfree_skb(tmp_skb); | |
2734 | ||
2735 | if (!skb) | |
2736 | return true; | |
2737 | } | |
2738 | ||
5a490510 | 2739 | ieee80211_tx_stats(dev, skb->len + extra_head); |
17c18bf8 JB |
2740 | |
2741 | /* will not be crypto-handled beyond what we do here, so use false | |
2742 | * as the may-encrypt argument for the resize to not account for | |
2743 | * more room than we already have in 'extra_head' | |
2744 | */ | |
2745 | if (unlikely(ieee80211_skb_resize(sdata, skb, | |
2746 | max_t(int, extra_head + hw_headroom - | |
2747 | skb_headroom(skb), 0), | |
2748 | false))) { | |
2749 | kfree_skb(skb); | |
2750 | return true; | |
2751 | } | |
2752 | ||
2753 | memcpy(ð, skb->data, ETH_HLEN - 2); | |
2754 | hdr = (void *)skb_push(skb, extra_head); | |
2755 | memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len); | |
2756 | memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN); | |
2757 | memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN); | |
2758 | ||
2759 | memset(info, 0, sizeof(*info)); | |
2760 | info->band = fast_tx->band; | |
2761 | info->control.vif = &sdata->vif; | |
2762 | info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT | | |
2763 | IEEE80211_TX_CTL_DONTFRAG | | |
2764 | (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0); | |
2765 | ||
2766 | if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) { | |
2767 | *ieee80211_get_qos_ctl(hdr) = tid; | |
2768 | hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid); | |
2769 | } else { | |
2770 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
2771 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number); | |
2772 | sdata->sequence_number += 0x10; | |
2773 | } | |
2774 | ||
2775 | sta->tx_msdu[tid]++; | |
2776 | ||
2777 | info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
2778 | ||
2779 | __skb_queue_head_init(&tx.skbs); | |
2780 | ||
2781 | tx.flags = IEEE80211_TX_UNICAST; | |
2782 | tx.local = local; | |
2783 | tx.sdata = sdata; | |
2784 | tx.sta = sta; | |
2785 | tx.key = fast_tx->key; | |
2786 | ||
2787 | if (fast_tx->key) | |
2788 | info->control.hw_key = &fast_tx->key->conf; | |
2789 | ||
2790 | if (!(local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) { | |
2791 | tx.skb = skb; | |
2792 | r = ieee80211_tx_h_rate_ctrl(&tx); | |
2793 | skb = tx.skb; | |
2794 | tx.skb = NULL; | |
2795 | ||
2796 | if (r != TX_CONTINUE) { | |
2797 | if (r != TX_QUEUED) | |
2798 | kfree_skb(skb); | |
2799 | return true; | |
2800 | } | |
2801 | } | |
2802 | ||
2803 | /* statistics normally done by ieee80211_tx_h_stats (but that | |
2804 | * has to consider fragmentation, so is more complex) | |
2805 | */ | |
17c18bf8 JB |
2806 | sta->tx_bytes[skb_get_queue_mapping(skb)] += skb->len; |
2807 | sta->tx_packets[skb_get_queue_mapping(skb)]++; | |
2808 | ||
2809 | if (fast_tx->pn_offs) { | |
2810 | u64 pn; | |
2811 | u8 *crypto_hdr = skb->data + fast_tx->pn_offs; | |
2812 | ||
2813 | switch (fast_tx->key->conf.cipher) { | |
2814 | case WLAN_CIPHER_SUITE_CCMP: | |
2815 | case WLAN_CIPHER_SUITE_CCMP_256: | |
2816 | pn = atomic64_inc_return(&fast_tx->key->u.ccmp.tx_pn); | |
2817 | crypto_hdr[0] = pn; | |
2818 | crypto_hdr[1] = pn >> 8; | |
2819 | crypto_hdr[4] = pn >> 16; | |
2820 | crypto_hdr[5] = pn >> 24; | |
2821 | crypto_hdr[6] = pn >> 32; | |
2822 | crypto_hdr[7] = pn >> 40; | |
2823 | break; | |
2824 | case WLAN_CIPHER_SUITE_GCMP: | |
2825 | case WLAN_CIPHER_SUITE_GCMP_256: | |
2826 | pn = atomic64_inc_return(&fast_tx->key->u.gcmp.tx_pn); | |
2827 | crypto_hdr[0] = pn; | |
2828 | crypto_hdr[1] = pn >> 8; | |
2829 | crypto_hdr[4] = pn >> 16; | |
2830 | crypto_hdr[5] = pn >> 24; | |
2831 | crypto_hdr[6] = pn >> 32; | |
2832 | crypto_hdr[7] = pn >> 40; | |
2833 | break; | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
2838 | sdata = container_of(sdata->bss, | |
2839 | struct ieee80211_sub_if_data, u.ap); | |
2840 | ||
2841 | __skb_queue_tail(&tx.skbs, skb); | |
2842 | ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false); | |
2843 | return true; | |
2844 | } | |
2845 | ||
4c9451ed JB |
2846 | void __ieee80211_subif_start_xmit(struct sk_buff *skb, |
2847 | struct net_device *dev, | |
2848 | u32 info_flags) | |
2849 | { | |
2850 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
97ffe757 | 2851 | struct sta_info *sta; |
80616c0d | 2852 | struct sk_buff *next; |
4c9451ed JB |
2853 | |
2854 | if (unlikely(skb->len < ETH_HLEN)) { | |
2855 | kfree_skb(skb); | |
2856 | return; | |
2857 | } | |
2858 | ||
2859 | rcu_read_lock(); | |
e2ebc74d | 2860 | |
2d981fdd JB |
2861 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) |
2862 | goto out_free; | |
4c9451ed | 2863 | |
17c18bf8 JB |
2864 | if (!IS_ERR_OR_NULL(sta)) { |
2865 | struct ieee80211_fast_tx *fast_tx; | |
2866 | ||
2867 | fast_tx = rcu_dereference(sta->fast_tx); | |
2868 | ||
2869 | if (fast_tx && | |
2870 | ieee80211_xmit_fast(sdata, dev, sta, fast_tx, skb)) | |
2871 | goto out; | |
2872 | } | |
2873 | ||
80616c0d JB |
2874 | if (skb_is_gso(skb)) { |
2875 | struct sk_buff *segs; | |
680a0dab | 2876 | |
80616c0d JB |
2877 | segs = skb_gso_segment(skb, 0); |
2878 | if (IS_ERR(segs)) { | |
2d981fdd | 2879 | goto out_free; |
80616c0d JB |
2880 | } else if (segs) { |
2881 | consume_skb(skb); | |
2882 | skb = segs; | |
2883 | } | |
2884 | } else { | |
2885 | /* we cannot process non-linear frames on this path */ | |
2886 | if (skb_linearize(skb)) { | |
2887 | kfree_skb(skb); | |
2888 | goto out; | |
2889 | } | |
2890 | ||
2891 | /* the frame could be fragmented, software-encrypted, and other | |
2892 | * things so we cannot really handle checksum offload with it - | |
2893 | * fix it up in software before we handle anything else. | |
2894 | */ | |
2895 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
f603f1f3 JB |
2896 | skb_set_transport_header(skb, |
2897 | skb_checksum_start_offset(skb)); | |
80616c0d JB |
2898 | if (skb_checksum_help(skb)) |
2899 | goto out_free; | |
2900 | } | |
2d981fdd JB |
2901 | } |
2902 | ||
80616c0d JB |
2903 | next = skb; |
2904 | while (next) { | |
2905 | skb = next; | |
2906 | next = skb->next; | |
4c9451ed | 2907 | |
80616c0d JB |
2908 | skb->prev = NULL; |
2909 | skb->next = NULL; | |
2910 | ||
2911 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
2912 | if (IS_ERR(skb)) | |
2913 | goto out; | |
e2ebc74d | 2914 | |
5a490510 | 2915 | ieee80211_tx_stats(dev, skb->len); |
80616c0d JB |
2916 | |
2917 | ieee80211_xmit(sdata, sta, skb); | |
2918 | } | |
2d981fdd JB |
2919 | goto out; |
2920 | out_free: | |
2921 | kfree_skb(skb); | |
4c9451ed | 2922 | out: |
55de908a | 2923 | rcu_read_unlock(); |
e2ebc74d JB |
2924 | } |
2925 | ||
4c9451ed JB |
2926 | /** |
2927 | * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs | |
2928 | * @skb: packet to be sent | |
2929 | * @dev: incoming interface | |
2930 | * | |
2931 | * On failure skb will be freed. | |
2932 | */ | |
24d342c5 LK |
2933 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
2934 | struct net_device *dev) | |
2935 | { | |
2936 | __ieee80211_subif_start_xmit(skb, dev, 0); | |
2937 | return NETDEV_TX_OK; | |
2938 | } | |
e2ebc74d | 2939 | |
7528ec57 JB |
2940 | struct sk_buff * |
2941 | ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, | |
2942 | struct sk_buff *skb, u32 info_flags) | |
2943 | { | |
2944 | struct ieee80211_hdr *hdr; | |
2945 | struct ieee80211_tx_data tx = { | |
2946 | .local = sdata->local, | |
2947 | .sdata = sdata, | |
2948 | }; | |
97ffe757 | 2949 | struct sta_info *sta; |
7528ec57 JB |
2950 | |
2951 | rcu_read_lock(); | |
2952 | ||
97ffe757 JB |
2953 | if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) { |
2954 | kfree_skb(skb); | |
2955 | skb = ERR_PTR(-EINVAL); | |
2956 | goto out; | |
2957 | } | |
2958 | ||
2959 | skb = ieee80211_build_hdr(sdata, skb, info_flags, sta); | |
7528ec57 JB |
2960 | if (IS_ERR(skb)) |
2961 | goto out; | |
2962 | ||
2963 | hdr = (void *)skb->data; | |
2964 | tx.sta = sta_info_get(sdata, hdr->addr1); | |
2965 | tx.skb = skb; | |
2966 | ||
2967 | if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) { | |
2968 | rcu_read_unlock(); | |
2969 | kfree_skb(skb); | |
2970 | return ERR_PTR(-EINVAL); | |
2971 | } | |
2972 | ||
2973 | out: | |
2974 | rcu_read_unlock(); | |
2975 | return skb; | |
2976 | } | |
2977 | ||
e2530083 JB |
2978 | /* |
2979 | * ieee80211_clear_tx_pending may not be called in a context where | |
2980 | * it is possible that it packets could come in again. | |
2981 | */ | |
e2ebc74d JB |
2982 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2983 | { | |
1f98ab7f | 2984 | struct sk_buff *skb; |
2de8e0d9 | 2985 | int i; |
e2ebc74d | 2986 | |
1f98ab7f FF |
2987 | for (i = 0; i < local->hw.queues; i++) { |
2988 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2989 | ieee80211_free_txskb(&local->hw, skb); | |
2990 | } | |
e2ebc74d JB |
2991 | } |
2992 | ||
7bb45683 JB |
2993 | /* |
2994 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2995 | * which in this case means re-queued -- take as an indication to stop sending | |
2996 | * more pending frames. | |
2997 | */ | |
cd8ffc80 JB |
2998 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2999 | struct sk_buff *skb) | |
3000 | { | |
3001 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
3002 | struct ieee80211_sub_if_data *sdata; | |
3003 | struct sta_info *sta; | |
3004 | struct ieee80211_hdr *hdr; | |
7bb45683 | 3005 | bool result; |
55de908a | 3006 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 3007 | |
5061b0c2 | 3008 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
3009 | |
3010 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
3011 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
3012 | if (unlikely(!chanctx_conf)) { | |
3013 | dev_kfree_skb(skb); | |
3014 | return true; | |
3015 | } | |
73c4e195 | 3016 | info->band = chanctx_conf->def.chan->band; |
7c10770f | 3017 | result = ieee80211_tx(sdata, NULL, skb, true); |
cd8ffc80 | 3018 | } else { |
252b86c4 JB |
3019 | struct sk_buff_head skbs; |
3020 | ||
3021 | __skb_queue_head_init(&skbs); | |
3022 | __skb_queue_tail(&skbs, skb); | |
3023 | ||
cd8ffc80 | 3024 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 3025 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 3026 | |
74e4dbfd | 3027 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
3028 | } |
3029 | ||
cd8ffc80 JB |
3030 | return result; |
3031 | } | |
3032 | ||
e2530083 | 3033 | /* |
3b8d81e0 | 3034 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 3035 | */ |
e2ebc74d JB |
3036 | void ieee80211_tx_pending(unsigned long data) |
3037 | { | |
3038 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 3039 | unsigned long flags; |
cd8ffc80 | 3040 | int i; |
3b8d81e0 | 3041 | bool txok; |
e2ebc74d | 3042 | |
f0e72851 | 3043 | rcu_read_lock(); |
e2530083 | 3044 | |
3b8d81e0 | 3045 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
3046 | for (i = 0; i < local->hw.queues; i++) { |
3047 | /* | |
3048 | * If queue is stopped by something other than due to pending | |
3049 | * frames, or we have no pending frames, proceed to next queue. | |
3050 | */ | |
3b8d81e0 | 3051 | if (local->queue_stop_reasons[i] || |
2a577d98 | 3052 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 3053 | continue; |
e2530083 | 3054 | |
2a577d98 | 3055 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 3056 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 3057 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 3058 | |
a7bc376c | 3059 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 3060 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
3061 | continue; |
3062 | } | |
3063 | ||
3b8d81e0 JB |
3064 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
3065 | flags); | |
3066 | ||
3067 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
3068 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
3069 | flags); | |
3070 | if (!txok) | |
2a577d98 | 3071 | break; |
e2ebc74d | 3072 | } |
7236fe29 JB |
3073 | |
3074 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 3075 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 3076 | } |
3b8d81e0 | 3077 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 3078 | |
f0e72851 | 3079 | rcu_read_unlock(); |
e2ebc74d JB |
3080 | } |
3081 | ||
3082 | /* functions for drivers to get certain frames */ | |
3083 | ||
eac70c13 | 3084 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3085 | struct ps_data *ps, struct sk_buff *skb, |
3086 | bool is_template) | |
e2ebc74d JB |
3087 | { |
3088 | u8 *pos, *tim; | |
3089 | int aid0 = 0; | |
3090 | int i, have_bits = 0, n1, n2; | |
3091 | ||
3092 | /* Generate bitmap for TIM only if there are any STAs in power save | |
3093 | * mode. */ | |
d012a605 | 3094 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
3095 | /* in the hope that this is faster than |
3096 | * checking byte-for-byte */ | |
f359d3fe | 3097 | have_bits = !bitmap_empty((unsigned long *)ps->tim, |
e2ebc74d | 3098 | IEEE80211_MAX_AID+1); |
6ec8c332 AO |
3099 | if (!is_template) { |
3100 | if (ps->dtim_count == 0) | |
3101 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
3102 | else | |
3103 | ps->dtim_count--; | |
3104 | } | |
e2ebc74d JB |
3105 | |
3106 | tim = pos = (u8 *) skb_put(skb, 6); | |
3107 | *pos++ = WLAN_EID_TIM; | |
3108 | *pos++ = 4; | |
d012a605 | 3109 | *pos++ = ps->dtim_count; |
8860020e | 3110 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 3111 | |
d012a605 | 3112 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
3113 | aid0 = 1; |
3114 | ||
d012a605 | 3115 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 3116 | |
e2ebc74d JB |
3117 | if (have_bits) { |
3118 | /* Find largest even number N1 so that bits numbered 1 through | |
3119 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
3120 | * (N2 + 1) x 8 through 2007 are 0. */ | |
3121 | n1 = 0; | |
3122 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 3123 | if (ps->tim[i]) { |
e2ebc74d JB |
3124 | n1 = i & 0xfe; |
3125 | break; | |
3126 | } | |
3127 | } | |
3128 | n2 = n1; | |
3129 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 3130 | if (ps->tim[i]) { |
e2ebc74d JB |
3131 | n2 = i; |
3132 | break; | |
3133 | } | |
3134 | } | |
3135 | ||
3136 | /* Bitmap control */ | |
3137 | *pos++ = n1 | aid0; | |
3138 | /* Part Virt Bitmap */ | |
5220da39 | 3139 | skb_put(skb, n2 - n1); |
d012a605 | 3140 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
3141 | |
3142 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
3143 | } else { |
3144 | *pos++ = aid0; /* Bitmap control */ | |
3145 | *pos++ = 0; /* Part Virt Bitmap */ | |
3146 | } | |
e2ebc74d JB |
3147 | } |
3148 | ||
eac70c13 | 3149 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
6ec8c332 AO |
3150 | struct ps_data *ps, struct sk_buff *skb, |
3151 | bool is_template) | |
eac70c13 MP |
3152 | { |
3153 | struct ieee80211_local *local = sdata->local; | |
3154 | ||
3155 | /* | |
3156 | * Not very nice, but we want to allow the driver to call | |
3157 | * ieee80211_beacon_get() as a response to the set_tim() | |
3158 | * callback. That, however, is already invoked under the | |
3159 | * sta_lock to guarantee consistent and race-free update | |
3160 | * of the tim bitmap in mac80211 and the driver. | |
3161 | */ | |
3162 | if (local->tim_in_locked_section) { | |
6ec8c332 | 3163 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
eac70c13 | 3164 | } else { |
1b91731d | 3165 | spin_lock_bh(&local->tim_lock); |
6ec8c332 | 3166 | __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); |
1b91731d | 3167 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
3168 | } |
3169 | ||
3170 | return 0; | |
3171 | } | |
3172 | ||
1af586c9 AO |
3173 | static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, |
3174 | struct beacon_data *beacon) | |
73da7d5b SW |
3175 | { |
3176 | struct probe_resp *resp; | |
cd7760e6 SW |
3177 | u8 *beacon_data; |
3178 | size_t beacon_data_len; | |
0d06d9ba | 3179 | int i; |
af296bdb | 3180 | u8 count = beacon->csa_current_counter; |
cd7760e6 SW |
3181 | |
3182 | switch (sdata->vif.type) { | |
3183 | case NL80211_IFTYPE_AP: | |
3184 | beacon_data = beacon->tail; | |
3185 | beacon_data_len = beacon->tail_len; | |
3186 | break; | |
3187 | case NL80211_IFTYPE_ADHOC: | |
3188 | beacon_data = beacon->head; | |
3189 | beacon_data_len = beacon->head_len; | |
3190 | break; | |
b8456a14 CYY |
3191 | case NL80211_IFTYPE_MESH_POINT: |
3192 | beacon_data = beacon->head; | |
3193 | beacon_data_len = beacon->head_len; | |
3194 | break; | |
cd7760e6 SW |
3195 | default: |
3196 | return; | |
3197 | } | |
73da7d5b | 3198 | |
af296bdb | 3199 | rcu_read_lock(); |
0d06d9ba | 3200 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { |
af296bdb | 3201 | resp = rcu_dereference(sdata->u.ap.probe_resp); |
0d06d9ba | 3202 | |
af296bdb MK |
3203 | if (beacon->csa_counter_offsets[i]) { |
3204 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >= | |
3205 | beacon_data_len)) { | |
0d06d9ba AO |
3206 | rcu_read_unlock(); |
3207 | return; | |
3208 | } | |
af296bdb MK |
3209 | |
3210 | beacon_data[beacon->csa_counter_offsets[i]] = count; | |
73da7d5b | 3211 | } |
af296bdb MK |
3212 | |
3213 | if (sdata->vif.type == NL80211_IFTYPE_AP && resp) | |
3214 | resp->data[resp->csa_counter_offsets[i]] = count; | |
73da7d5b | 3215 | } |
af296bdb | 3216 | rcu_read_unlock(); |
1af586c9 AO |
3217 | } |
3218 | ||
3219 | u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) | |
3220 | { | |
3221 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
af296bdb MK |
3222 | struct beacon_data *beacon = NULL; |
3223 | u8 count = 0; | |
0d06d9ba | 3224 | |
af296bdb MK |
3225 | rcu_read_lock(); |
3226 | ||
3227 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
3228 | beacon = rcu_dereference(sdata->u.ap.beacon); | |
3229 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
3230 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
3231 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
3232 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
3233 | ||
3234 | if (!beacon) | |
3235 | goto unlock; | |
3236 | ||
3237 | beacon->csa_current_counter--; | |
1af586c9 AO |
3238 | |
3239 | /* the counter should never reach 0 */ | |
af296bdb MK |
3240 | WARN_ON_ONCE(!beacon->csa_current_counter); |
3241 | count = beacon->csa_current_counter; | |
1af586c9 | 3242 | |
af296bdb MK |
3243 | unlock: |
3244 | rcu_read_unlock(); | |
3245 | return count; | |
73da7d5b | 3246 | } |
1af586c9 | 3247 | EXPORT_SYMBOL(ieee80211_csa_update_counter); |
73da7d5b SW |
3248 | |
3249 | bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) | |
3250 | { | |
3251 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3252 | struct beacon_data *beacon = NULL; | |
3253 | u8 *beacon_data; | |
3254 | size_t beacon_data_len; | |
73da7d5b SW |
3255 | int ret = false; |
3256 | ||
3257 | if (!ieee80211_sdata_running(sdata)) | |
3258 | return false; | |
3259 | ||
3260 | rcu_read_lock(); | |
3261 | if (vif->type == NL80211_IFTYPE_AP) { | |
3262 | struct ieee80211_if_ap *ap = &sdata->u.ap; | |
3263 | ||
3264 | beacon = rcu_dereference(ap->beacon); | |
3265 | if (WARN_ON(!beacon || !beacon->tail)) | |
3266 | goto out; | |
3267 | beacon_data = beacon->tail; | |
3268 | beacon_data_len = beacon->tail_len; | |
cd7760e6 SW |
3269 | } else if (vif->type == NL80211_IFTYPE_ADHOC) { |
3270 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; | |
3271 | ||
3272 | beacon = rcu_dereference(ifibss->presp); | |
3273 | if (!beacon) | |
3274 | goto out; | |
3275 | ||
b8456a14 CYY |
3276 | beacon_data = beacon->head; |
3277 | beacon_data_len = beacon->head_len; | |
3278 | } else if (vif->type == NL80211_IFTYPE_MESH_POINT) { | |
3279 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; | |
3280 | ||
3281 | beacon = rcu_dereference(ifmsh->beacon); | |
3282 | if (!beacon) | |
3283 | goto out; | |
3284 | ||
cd7760e6 SW |
3285 | beacon_data = beacon->head; |
3286 | beacon_data_len = beacon->head_len; | |
73da7d5b SW |
3287 | } else { |
3288 | WARN_ON(1); | |
3289 | goto out; | |
3290 | } | |
3291 | ||
10d78f27 MK |
3292 | if (!beacon->csa_counter_offsets[0]) |
3293 | goto out; | |
3294 | ||
af296bdb | 3295 | if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len)) |
73da7d5b SW |
3296 | goto out; |
3297 | ||
af296bdb | 3298 | if (beacon_data[beacon->csa_counter_offsets[0]] == 1) |
73da7d5b SW |
3299 | ret = true; |
3300 | out: | |
3301 | rcu_read_unlock(); | |
3302 | ||
3303 | return ret; | |
3304 | } | |
3305 | EXPORT_SYMBOL(ieee80211_csa_is_complete); | |
3306 | ||
6ec8c332 AO |
3307 | static struct sk_buff * |
3308 | __ieee80211_beacon_get(struct ieee80211_hw *hw, | |
3309 | struct ieee80211_vif *vif, | |
3310 | struct ieee80211_mutable_offsets *offs, | |
3311 | bool is_template) | |
e2ebc74d JB |
3312 | { |
3313 | struct ieee80211_local *local = hw_to_local(hw); | |
af296bdb | 3314 | struct beacon_data *beacon = NULL; |
9d139c81 | 3315 | struct sk_buff *skb = NULL; |
e039fa4a | 3316 | struct ieee80211_tx_info *info; |
e2ebc74d | 3317 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 3318 | enum ieee80211_band band; |
e00cfce0 | 3319 | struct ieee80211_tx_rate_control txrc; |
55de908a | 3320 | struct ieee80211_chanctx_conf *chanctx_conf; |
1af586c9 | 3321 | int csa_off_base = 0; |
8318d78a | 3322 | |
5dfdaf58 | 3323 | rcu_read_lock(); |
e2ebc74d | 3324 | |
32bfd35d | 3325 | sdata = vif_to_sdata(vif); |
55de908a | 3326 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 3327 | |
55de908a | 3328 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
3329 | goto out; |
3330 | ||
6ec8c332 AO |
3331 | if (offs) |
3332 | memset(offs, 0, sizeof(*offs)); | |
eddcbb94 | 3333 | |
05c914fe | 3334 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 | 3335 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
d012a605 | 3336 | |
af296bdb | 3337 | beacon = rcu_dereference(ap->beacon); |
3ad97fbc | 3338 | if (beacon) { |
10d78f27 | 3339 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
3340 | if (!is_template) |
3341 | ieee80211_csa_update_counter(vif); | |
3342 | ||
3343 | ieee80211_set_csa(sdata, beacon); | |
3344 | } | |
73da7d5b | 3345 | |
902acc78 JB |
3346 | /* |
3347 | * headroom, head length, | |
3348 | * tail length and maximum TIM length | |
3349 | */ | |
3350 | skb = dev_alloc_skb(local->tx_headroom + | |
3351 | beacon->head_len + | |
70dabeb7 FF |
3352 | beacon->tail_len + 256 + |
3353 | local->hw.extra_beacon_tailroom); | |
902acc78 JB |
3354 | if (!skb) |
3355 | goto out; | |
33b64eb2 | 3356 | |
902acc78 JB |
3357 | skb_reserve(skb, local->tx_headroom); |
3358 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
3359 | beacon->head_len); | |
33b64eb2 | 3360 | |
6ec8c332 AO |
3361 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb, |
3362 | is_template); | |
33b64eb2 | 3363 | |
6ec8c332 AO |
3364 | if (offs) { |
3365 | offs->tim_offset = beacon->head_len; | |
3366 | offs->tim_length = skb->len - beacon->head_len; | |
1af586c9 AO |
3367 | |
3368 | /* for AP the csa offsets are from tail */ | |
3369 | csa_off_base = skb->len; | |
6ec8c332 | 3370 | } |
eddcbb94 | 3371 | |
902acc78 JB |
3372 | if (beacon->tail) |
3373 | memcpy(skb_put(skb, beacon->tail_len), | |
3374 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
3375 | } else |
3376 | goto out; | |
05c914fe | 3377 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 3378 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 3379 | struct ieee80211_hdr *hdr; |
33b64eb2 | 3380 | |
af296bdb MK |
3381 | beacon = rcu_dereference(ifibss->presp); |
3382 | if (!beacon) | |
9d139c81 JB |
3383 | goto out; |
3384 | ||
10d78f27 | 3385 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
3386 | if (!is_template) |
3387 | ieee80211_csa_update_counter(vif); | |
cd7760e6 | 3388 | |
af296bdb | 3389 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 3390 | } |
cd7760e6 | 3391 | |
af296bdb | 3392 | skb = dev_alloc_skb(local->tx_headroom + beacon->head_len + |
70dabeb7 | 3393 | local->hw.extra_beacon_tailroom); |
9d139c81 JB |
3394 | if (!skb) |
3395 | goto out; | |
c3ffeab4 | 3396 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
3397 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
3398 | beacon->head_len); | |
9d139c81 JB |
3399 | |
3400 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
3401 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
3402 | IEEE80211_STYPE_BEACON); | |
902acc78 | 3403 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 3404 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
472dbc45 | 3405 | |
af296bdb MK |
3406 | beacon = rcu_dereference(ifmsh->beacon); |
3407 | if (!beacon) | |
ac1bd846 | 3408 | goto out; |
ac1bd846 | 3409 | |
10d78f27 | 3410 | if (beacon->csa_counter_offsets[0]) { |
1af586c9 AO |
3411 | if (!is_template) |
3412 | /* TODO: For mesh csa_counter is in TU, so | |
3413 | * decrementing it by one isn't correct, but | |
3414 | * for now we leave it consistent with overall | |
3415 | * mac80211's behavior. | |
3416 | */ | |
3417 | ieee80211_csa_update_counter(vif); | |
3418 | ||
af296bdb | 3419 | ieee80211_set_csa(sdata, beacon); |
1af586c9 | 3420 | } |
b8456a14 | 3421 | |
dbf498fb | 3422 | if (ifmsh->sync_ops) |
af296bdb | 3423 | ifmsh->sync_ops->adjust_tbtt(sdata, beacon); |
dbf498fb | 3424 | |
3b69a9c5 | 3425 | skb = dev_alloc_skb(local->tx_headroom + |
af296bdb | 3426 | beacon->head_len + |
3f52b7e3 | 3427 | 256 + /* TIM IE */ |
af296bdb | 3428 | beacon->tail_len + |
70dabeb7 | 3429 | local->hw.extra_beacon_tailroom); |
902acc78 JB |
3430 | if (!skb) |
3431 | goto out; | |
2b5e1967 | 3432 | skb_reserve(skb, local->tx_headroom); |
af296bdb MK |
3433 | memcpy(skb_put(skb, beacon->head_len), beacon->head, |
3434 | beacon->head_len); | |
6ec8c332 AO |
3435 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); |
3436 | ||
3437 | if (offs) { | |
af296bdb MK |
3438 | offs->tim_offset = beacon->head_len; |
3439 | offs->tim_length = skb->len - beacon->head_len; | |
6ec8c332 AO |
3440 | } |
3441 | ||
af296bdb MK |
3442 | memcpy(skb_put(skb, beacon->tail_len), beacon->tail, |
3443 | beacon->tail_len); | |
9d139c81 JB |
3444 | } else { |
3445 | WARN_ON(1); | |
5dfdaf58 | 3446 | goto out; |
e2ebc74d JB |
3447 | } |
3448 | ||
1af586c9 | 3449 | /* CSA offsets */ |
af296bdb | 3450 | if (offs && beacon) { |
1af586c9 AO |
3451 | int i; |
3452 | ||
3453 | for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { | |
af296bdb | 3454 | u16 csa_off = beacon->csa_counter_offsets[i]; |
1af586c9 AO |
3455 | |
3456 | if (!csa_off) | |
3457 | continue; | |
3458 | ||
3459 | offs->csa_counter_offs[i] = csa_off_base + csa_off; | |
3460 | } | |
3461 | } | |
3462 | ||
4bf88530 | 3463 | band = chanctx_conf->def.chan->band; |
55de908a | 3464 | |
e039fa4a JB |
3465 | info = IEEE80211_SKB_CB(skb); |
3466 | ||
3b8d81e0 | 3467 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 3468 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 3469 | info->band = band; |
e00cfce0 JM |
3470 | |
3471 | memset(&txrc, 0, sizeof(txrc)); | |
3472 | txrc.hw = hw; | |
e31583cd | 3473 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
3474 | txrc.bss_conf = &sdata->vif.bss_conf; |
3475 | txrc.skb = skb; | |
3476 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 3477 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 3478 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
3479 | txrc.max_rate_idx = -1; |
3480 | else | |
3481 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 3482 | txrc.bss = true; |
e00cfce0 | 3483 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
3484 | |
3485 | info->control.vif = vif; | |
f591fa5d | 3486 | |
a472e71b JL |
3487 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
3488 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
3489 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 3490 | out: |
5dfdaf58 | 3491 | rcu_read_unlock(); |
e2ebc74d | 3492 | return skb; |
6ec8c332 AO |
3493 | |
3494 | } | |
3495 | ||
3496 | struct sk_buff * | |
3497 | ieee80211_beacon_get_template(struct ieee80211_hw *hw, | |
3498 | struct ieee80211_vif *vif, | |
3499 | struct ieee80211_mutable_offsets *offs) | |
3500 | { | |
3501 | return __ieee80211_beacon_get(hw, vif, offs, true); | |
3502 | } | |
3503 | EXPORT_SYMBOL(ieee80211_beacon_get_template); | |
3504 | ||
3505 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, | |
3506 | struct ieee80211_vif *vif, | |
3507 | u16 *tim_offset, u16 *tim_length) | |
3508 | { | |
3509 | struct ieee80211_mutable_offsets offs = {}; | |
3510 | struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); | |
3511 | ||
3512 | if (tim_offset) | |
3513 | *tim_offset = offs.tim_offset; | |
3514 | ||
3515 | if (tim_length) | |
3516 | *tim_length = offs.tim_length; | |
3517 | ||
3518 | return bcn; | |
e2ebc74d | 3519 | } |
eddcbb94 | 3520 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 3521 | |
02945821 AN |
3522 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
3523 | struct ieee80211_vif *vif) | |
3524 | { | |
3525 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
3526 | struct sk_buff *skb = NULL; |
3527 | struct probe_resp *presp = NULL; | |
02945821 AN |
3528 | struct ieee80211_hdr *hdr; |
3529 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
3530 | ||
3531 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
3532 | return NULL; | |
3533 | ||
3534 | rcu_read_lock(); | |
3535 | ||
3536 | ap = &sdata->u.ap; | |
3537 | presp = rcu_dereference(ap->probe_resp); | |
3538 | if (!presp) | |
3539 | goto out; | |
3540 | ||
aa7a0080 | 3541 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
3542 | if (!skb) |
3543 | goto out; | |
3544 | ||
aa7a0080 ES |
3545 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
3546 | ||
02945821 AN |
3547 | hdr = (struct ieee80211_hdr *) skb->data; |
3548 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
3549 | ||
3550 | out: | |
3551 | rcu_read_unlock(); | |
3552 | return skb; | |
3553 | } | |
3554 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
3555 | ||
7044cc56 KV |
3556 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
3557 | struct ieee80211_vif *vif) | |
3558 | { | |
3559 | struct ieee80211_sub_if_data *sdata; | |
3560 | struct ieee80211_if_managed *ifmgd; | |
3561 | struct ieee80211_pspoll *pspoll; | |
3562 | struct ieee80211_local *local; | |
3563 | struct sk_buff *skb; | |
3564 | ||
3565 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
3566 | return NULL; | |
3567 | ||
3568 | sdata = vif_to_sdata(vif); | |
3569 | ifmgd = &sdata->u.mgd; | |
3570 | local = sdata->local; | |
3571 | ||
3572 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 3573 | if (!skb) |
7044cc56 | 3574 | return NULL; |
d15b8459 | 3575 | |
7044cc56 KV |
3576 | skb_reserve(skb, local->hw.extra_tx_headroom); |
3577 | ||
3578 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
3579 | memset(pspoll, 0, sizeof(*pspoll)); | |
3580 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
3581 | IEEE80211_STYPE_PSPOLL); | |
3582 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
3583 | ||
3584 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
3585 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
3586 | ||
3587 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
3588 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
3589 | ||
3590 | return skb; | |
3591 | } | |
3592 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
3593 | ||
3594 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
3595 | struct ieee80211_vif *vif) | |
3596 | { | |
3597 | struct ieee80211_hdr_3addr *nullfunc; | |
3598 | struct ieee80211_sub_if_data *sdata; | |
3599 | struct ieee80211_if_managed *ifmgd; | |
3600 | struct ieee80211_local *local; | |
3601 | struct sk_buff *skb; | |
3602 | ||
3603 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
3604 | return NULL; | |
3605 | ||
3606 | sdata = vif_to_sdata(vif); | |
3607 | ifmgd = &sdata->u.mgd; | |
3608 | local = sdata->local; | |
3609 | ||
3610 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 3611 | if (!skb) |
7044cc56 | 3612 | return NULL; |
d15b8459 | 3613 | |
7044cc56 KV |
3614 | skb_reserve(skb, local->hw.extra_tx_headroom); |
3615 | ||
3616 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
3617 | sizeof(*nullfunc)); | |
3618 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
3619 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
3620 | IEEE80211_STYPE_NULLFUNC | | |
3621 | IEEE80211_FCTL_TODS); | |
3622 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
3623 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
3624 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
3625 | ||
3626 | return skb; | |
3627 | } | |
3628 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
3629 | ||
05e54ea6 | 3630 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
a344d677 | 3631 | const u8 *src_addr, |
05e54ea6 | 3632 | const u8 *ssid, size_t ssid_len, |
b9a9ada1 | 3633 | size_t tailroom) |
05e54ea6 | 3634 | { |
a344d677 | 3635 | struct ieee80211_local *local = hw_to_local(hw); |
05e54ea6 KV |
3636 | struct ieee80211_hdr_3addr *hdr; |
3637 | struct sk_buff *skb; | |
3638 | size_t ie_ssid_len; | |
3639 | u8 *pos; | |
3640 | ||
05e54ea6 KV |
3641 | ie_ssid_len = 2 + ssid_len; |
3642 | ||
3643 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 3644 | ie_ssid_len + tailroom); |
d15b8459 | 3645 | if (!skb) |
05e54ea6 | 3646 | return NULL; |
05e54ea6 KV |
3647 | |
3648 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3649 | ||
3650 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
3651 | memset(hdr, 0, sizeof(*hdr)); | |
3652 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
3653 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 3654 | eth_broadcast_addr(hdr->addr1); |
a344d677 | 3655 | memcpy(hdr->addr2, src_addr, ETH_ALEN); |
e83e6541 | 3656 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
3657 | |
3658 | pos = skb_put(skb, ie_ssid_len); | |
3659 | *pos++ = WLAN_EID_SSID; | |
3660 | *pos++ = ssid_len; | |
88c868c4 | 3661 | if (ssid_len) |
05e54ea6 KV |
3662 | memcpy(pos, ssid, ssid_len); |
3663 | pos += ssid_len; | |
3664 | ||
05e54ea6 KV |
3665 | return skb; |
3666 | } | |
3667 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
3668 | ||
32bfd35d | 3669 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3670 | const void *frame, size_t frame_len, |
e039fa4a | 3671 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3672 | struct ieee80211_rts *rts) |
3673 | { | |
3674 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3675 | |
065e9605 HH |
3676 | rts->frame_control = |
3677 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
3678 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
3679 | frame_txctl); | |
e2ebc74d JB |
3680 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
3681 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
3682 | } | |
3683 | EXPORT_SYMBOL(ieee80211_rts_get); | |
3684 | ||
32bfd35d | 3685 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 3686 | const void *frame, size_t frame_len, |
e039fa4a | 3687 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
3688 | struct ieee80211_cts *cts) |
3689 | { | |
3690 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 3691 | |
065e9605 HH |
3692 | cts->frame_control = |
3693 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
3694 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
3695 | frame_len, frame_txctl); | |
e2ebc74d JB |
3696 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
3697 | } | |
3698 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
3699 | ||
3700 | struct sk_buff * | |
32bfd35d | 3701 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 3702 | struct ieee80211_vif *vif) |
e2ebc74d JB |
3703 | { |
3704 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 3705 | struct sk_buff *skb = NULL; |
5cf121c3 | 3706 | struct ieee80211_tx_data tx; |
e2ebc74d | 3707 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 3708 | struct ps_data *ps; |
e039fa4a | 3709 | struct ieee80211_tx_info *info; |
55de908a | 3710 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 3711 | |
32bfd35d | 3712 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 3713 | |
5dfdaf58 | 3714 | rcu_read_lock(); |
55de908a | 3715 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 3716 | |
d012a605 MP |
3717 | if (!chanctx_conf) |
3718 | goto out; | |
3719 | ||
3720 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
3721 | struct beacon_data *beacon = | |
3722 | rcu_dereference(sdata->u.ap.beacon); | |
3723 | ||
3724 | if (!beacon || !beacon->head) | |
3725 | goto out; | |
3726 | ||
3727 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
3728 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
3729 | ps = &sdata->u.mesh.ps; | |
d012a605 | 3730 | } else { |
747cf5e9 | 3731 | goto out; |
d012a605 | 3732 | } |
5dfdaf58 | 3733 | |
d012a605 | 3734 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 3735 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 3736 | |
e2ebc74d | 3737 | while (1) { |
d012a605 | 3738 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 3739 | if (!skb) |
747cf5e9 | 3740 | goto out; |
e2ebc74d JB |
3741 | local->total_ps_buffered--; |
3742 | ||
d012a605 | 3743 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
3744 | struct ieee80211_hdr *hdr = |
3745 | (struct ieee80211_hdr *) skb->data; | |
3746 | /* more buffered multicast/broadcast frames ==> set | |
3747 | * MoreData flag in IEEE 802.11 header to inform PS | |
3748 | * STAs */ | |
3749 | hdr->frame_control |= | |
3750 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3751 | } | |
3752 | ||
112c44b2 | 3753 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
7cbf9d01 | 3754 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); |
7c10770f | 3755 | if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb)) |
e2ebc74d JB |
3756 | break; |
3757 | dev_kfree_skb_any(skb); | |
3758 | } | |
e039fa4a JB |
3759 | |
3760 | info = IEEE80211_SKB_CB(skb); | |
3761 | ||
5cf121c3 | 3762 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 3763 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 3764 | |
97b045d6 | 3765 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 3766 | skb = NULL; |
97b045d6 | 3767 | out: |
d0709a65 | 3768 | rcu_read_unlock(); |
e2ebc74d JB |
3769 | |
3770 | return skb; | |
3771 | } | |
3772 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 3773 | |
b6da911b LK |
3774 | int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid) |
3775 | { | |
3776 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3777 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3778 | struct ieee80211_local *local = sdata->local; | |
3779 | int ret; | |
3780 | u32 queues; | |
3781 | ||
3782 | lockdep_assert_held(&local->sta_mtx); | |
3783 | ||
3784 | /* only some cases are supported right now */ | |
3785 | switch (sdata->vif.type) { | |
3786 | case NL80211_IFTYPE_STATION: | |
3787 | case NL80211_IFTYPE_AP: | |
3788 | case NL80211_IFTYPE_AP_VLAN: | |
3789 | break; | |
3790 | default: | |
3791 | WARN_ON(1); | |
3792 | return -EINVAL; | |
3793 | } | |
3794 | ||
3795 | if (WARN_ON(tid >= IEEE80211_NUM_UPS)) | |
3796 | return -EINVAL; | |
3797 | ||
3798 | if (sta->reserved_tid == tid) { | |
3799 | ret = 0; | |
3800 | goto out; | |
3801 | } | |
3802 | ||
3803 | if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) { | |
3804 | sdata_err(sdata, "TID reservation already active\n"); | |
3805 | ret = -EALREADY; | |
3806 | goto out; | |
3807 | } | |
3808 | ||
3809 | ieee80211_stop_vif_queues(sdata->local, sdata, | |
3810 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3811 | ||
3812 | synchronize_net(); | |
3813 | ||
3814 | /* Tear down BA sessions so we stop aggregating on this TID */ | |
3815 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) { | |
3816 | set_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3817 | __ieee80211_stop_tx_ba_session(sta, tid, | |
3818 | AGG_STOP_LOCAL_REQUEST); | |
3819 | } | |
3820 | ||
3821 | queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]); | |
3b24f4c6 | 3822 | __ieee80211_flush_queues(local, sdata, queues, false); |
b6da911b LK |
3823 | |
3824 | sta->reserved_tid = tid; | |
3825 | ||
3826 | ieee80211_wake_vif_queues(local, sdata, | |
3827 | IEEE80211_QUEUE_STOP_REASON_RESERVE_TID); | |
3828 | ||
3829 | if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) | |
3830 | clear_sta_flag(sta, WLAN_STA_BLOCK_BA); | |
3831 | ||
3832 | ret = 0; | |
3833 | out: | |
3834 | return ret; | |
3835 | } | |
3836 | EXPORT_SYMBOL(ieee80211_reserve_tid); | |
3837 | ||
3838 | void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid) | |
3839 | { | |
3840 | struct sta_info *sta = container_of(pubsta, struct sta_info, sta); | |
3841 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
3842 | ||
3843 | lockdep_assert_held(&sdata->local->sta_mtx); | |
3844 | ||
3845 | /* only some cases are supported right now */ | |
3846 | switch (sdata->vif.type) { | |
3847 | case NL80211_IFTYPE_STATION: | |
3848 | case NL80211_IFTYPE_AP: | |
3849 | case NL80211_IFTYPE_AP_VLAN: | |
3850 | break; | |
3851 | default: | |
3852 | WARN_ON(1); | |
3853 | return; | |
3854 | } | |
3855 | ||
3856 | if (tid != sta->reserved_tid) { | |
3857 | sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid); | |
3858 | return; | |
3859 | } | |
3860 | ||
3861 | sta->reserved_tid = IEEE80211_TID_UNRESERVED; | |
3862 | } | |
3863 | EXPORT_SYMBOL(ieee80211_unreserve_tid); | |
3864 | ||
55de908a JB |
3865 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
3866 | struct sk_buff *skb, int tid, | |
3867 | enum ieee80211_band band) | |
3b8d81e0 | 3868 | { |
353d09c6 | 3869 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 3870 | |
3b8d81e0 JB |
3871 | skb_set_mac_header(skb, 0); |
3872 | skb_set_network_header(skb, 0); | |
3873 | skb_set_transport_header(skb, 0); | |
3874 | ||
3a25a8c8 | 3875 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 3876 | skb->priority = tid; |
cf0277e7 | 3877 | |
89afe614 JB |
3878 | skb->dev = sdata->dev; |
3879 | ||
3d34deb6 JB |
3880 | /* |
3881 | * The other path calling ieee80211_xmit is from the tasklet, | |
3882 | * and while we can handle concurrent transmissions locking | |
3883 | * requirements are that we do not come into tx with bhs on. | |
3884 | */ | |
3885 | local_bh_disable(); | |
73c4e195 | 3886 | IEEE80211_SKB_CB(skb)->band = band; |
7c10770f | 3887 | ieee80211_xmit(sdata, NULL, skb); |
3d34deb6 | 3888 | local_bh_enable(); |
3b8d81e0 | 3889 | } |