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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * | |
12 | * Transmit and frame generation functions. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/bitmap.h> | |
d4e46a3d | 20 | #include <linux/rcupdate.h> |
bc3b2d7f | 21 | #include <linux/export.h> |
881d966b | 22 | #include <net/net_namespace.h> |
e2ebc74d JB |
23 | #include <net/ieee80211_radiotap.h> |
24 | #include <net/cfg80211.h> | |
25 | #include <net/mac80211.h> | |
26 | #include <asm/unaligned.h> | |
27 | ||
28 | #include "ieee80211_i.h" | |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 | 30 | #include "led.h" |
33b64eb2 | 31 | #include "mesh.h" |
e2ebc74d JB |
32 | #include "wep.h" |
33 | #include "wpa.h" | |
34 | #include "wme.h" | |
2c8dccc7 | 35 | #include "rate.h" |
e2ebc74d | 36 | |
e2ebc74d JB |
37 | /* misc utils */ |
38 | ||
252b86c4 JB |
39 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
40 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 41 | int next_frag_len) |
e2ebc74d JB |
42 | { |
43 | int rate, mrate, erp, dur, i; | |
2e92e6f2 | 44 | struct ieee80211_rate *txrate; |
e2ebc74d | 45 | struct ieee80211_local *local = tx->local; |
8318d78a | 46 | struct ieee80211_supported_band *sband; |
358c8d9d | 47 | struct ieee80211_hdr *hdr; |
252b86c4 | 48 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b JB |
49 | |
50 | /* assume HW handles this */ | |
51 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS) | |
52 | return 0; | |
53 | ||
54 | /* uh huh? */ | |
55 | if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) | |
56 | return 0; | |
e2ebc74d | 57 | |
2d56577b | 58 | sband = local->hw.wiphy->bands[info->band]; |
e6a9854b | 59 | txrate = &sband->bitrates[info->control.rates[0].idx]; |
8318d78a | 60 | |
e6a9854b | 61 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
62 | |
63 | /* | |
64 | * data and mgmt (except PS Poll): | |
65 | * - during CFP: 32768 | |
66 | * - during contention period: | |
67 | * if addr1 is group address: 0 | |
68 | * if more fragments = 0 and addr1 is individual address: time to | |
69 | * transmit one ACK plus SIFS | |
70 | * if more fragments = 1 and addr1 is individual address: time to | |
71 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
72 | * | |
73 | * IEEE 802.11, 9.6: | |
74 | * - control response frame (CTS or ACK) shall be transmitted using the | |
75 | * same rate as the immediately previous frame in the frame exchange | |
76 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
77 | * at the highest possible rate belonging to the PHY rates in the | |
78 | * BSSBasicRateSet | |
79 | */ | |
252b86c4 | 80 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 81 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 82 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 83 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
84 | * needs to be updated to support duration field calculation. |
85 | * | |
86 | * RTS: time needed to transmit pending data/mgmt frame plus | |
87 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
88 | * CTS: duration of immediately previous RTS minus time | |
89 | * required to transmit CTS and its SIFS | |
90 | * ACK: 0 if immediately previous directed data/mgmt had | |
91 | * more=0, with more=1 duration in ACK frame is duration | |
92 | * from previous frame minus time needed to transmit ACK | |
93 | * and its SIFS | |
94 | * PS Poll: BIT(15) | BIT(14) | aid | |
95 | */ | |
96 | return 0; | |
97 | } | |
98 | ||
99 | /* data/mgmt */ | |
100 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 101 | return cpu_to_le16(32768); |
e2ebc74d JB |
102 | |
103 | if (group_addr) /* Group address as the destination - no ACK */ | |
104 | return 0; | |
105 | ||
106 | /* Individual destination address: | |
107 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
108 | * CTS and ACK frames shall be transmitted using the highest rate in | |
109 | * basic rate set that is less than or equal to the rate of the | |
110 | * immediately previous frame and that is using the same modulation | |
111 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
112 | * the highest mandatory rate of the PHY that is less than or equal to | |
113 | * the rate of the previous frame is used. | |
114 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
115 | */ | |
116 | rate = -1; | |
8318d78a JB |
117 | /* use lowest available if everything fails */ |
118 | mrate = sband->bitrates[0].bitrate; | |
119 | for (i = 0; i < sband->n_bitrates; i++) { | |
120 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 121 | |
8318d78a JB |
122 | if (r->bitrate > txrate->bitrate) |
123 | break; | |
e2ebc74d | 124 | |
bda3933a | 125 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
8318d78a JB |
126 | rate = r->bitrate; |
127 | ||
128 | switch (sband->band) { | |
129 | case IEEE80211_BAND_2GHZ: { | |
130 | u32 flag; | |
131 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
132 | flag = IEEE80211_RATE_MANDATORY_G; | |
133 | else | |
134 | flag = IEEE80211_RATE_MANDATORY_B; | |
135 | if (r->flags & flag) | |
136 | mrate = r->bitrate; | |
137 | break; | |
138 | } | |
139 | case IEEE80211_BAND_5GHZ: | |
140 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
141 | mrate = r->bitrate; | |
142 | break; | |
3a0c52a6 VK |
143 | case IEEE80211_BAND_60GHZ: |
144 | /* TODO, for now fall through */ | |
8318d78a JB |
145 | case IEEE80211_NUM_BANDS: |
146 | WARN_ON(1); | |
147 | break; | |
148 | } | |
e2ebc74d JB |
149 | } |
150 | if (rate == -1) { | |
151 | /* No matching basic rate found; use highest suitable mandatory | |
152 | * PHY rate */ | |
153 | rate = mrate; | |
154 | } | |
155 | ||
6674f210 SW |
156 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
157 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
c26a0e10 | 158 | *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK) |
6674f210 SW |
159 | dur = 0; |
160 | else | |
161 | /* Time needed to transmit ACK | |
162 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
163 | * to closest integer */ | |
4ee73f33 | 164 | dur = ieee80211_frame_duration(sband->band, 10, rate, erp, |
bda3933a | 165 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
166 | |
167 | if (next_frag_len) { | |
168 | /* Frame is fragmented: duration increases with time needed to | |
169 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
170 | dur *= 2; /* ACK + SIFS */ | |
171 | /* next fragment */ | |
4ee73f33 | 172 | dur += ieee80211_frame_duration(sband->band, next_frag_len, |
8318d78a | 173 | txrate->bitrate, erp, |
bda3933a | 174 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
175 | } |
176 | ||
03f93c3d | 177 | return cpu_to_le16(dur); |
e2ebc74d JB |
178 | } |
179 | ||
e2ebc74d | 180 | /* tx handlers */ |
5c1b98a5 KV |
181 | static ieee80211_tx_result debug_noinline |
182 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
183 | { | |
184 | struct ieee80211_local *local = tx->local; | |
0c74211d | 185 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
186 | |
187 | /* driver doesn't support power save */ | |
188 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
189 | return TX_CONTINUE; | |
190 | ||
191 | /* hardware does dynamic power save */ | |
192 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
193 | return TX_CONTINUE; | |
194 | ||
195 | /* dynamic power save disabled */ | |
196 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
197 | return TX_CONTINUE; | |
198 | ||
199 | /* we are scanning, don't enable power save */ | |
200 | if (local->scanning) | |
201 | return TX_CONTINUE; | |
202 | ||
203 | if (!local->ps_sdata) | |
204 | return TX_CONTINUE; | |
205 | ||
206 | /* No point if we're going to suspend */ | |
207 | if (local->quiescing) | |
208 | return TX_CONTINUE; | |
209 | ||
0c74211d KV |
210 | /* dynamic ps is supported only in managed mode */ |
211 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
212 | return TX_CONTINUE; | |
213 | ||
214 | ifmgd = &tx->sdata->u.mgd; | |
215 | ||
216 | /* | |
217 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
218 | * u-apsd enabled and the frame is in voip class. This effectively | |
219 | * means that even if all access categories have u-apsd enabled, in | |
220 | * practise u-apsd is only used with the voip ac. This is a | |
221 | * workaround for the case when received voip class packets do not | |
222 | * have correct qos tag for some reason, due the network or the | |
223 | * peer application. | |
224 | * | |
dc41e4d4 | 225 | * Note: ifmgd->uapsd_queues access is racy here. If the value is |
0c74211d KV |
226 | * changed via debugfs, user needs to reassociate manually to have |
227 | * everything in sync. | |
228 | */ | |
4875d30d JB |
229 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) && |
230 | (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) && | |
231 | skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO) | |
0c74211d KV |
232 | return TX_CONTINUE; |
233 | ||
5c1b98a5 KV |
234 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
235 | ieee80211_stop_queues_by_reason(&local->hw, | |
236 | IEEE80211_QUEUE_STOP_REASON_PS); | |
db28569a | 237 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
238 | ieee80211_queue_work(&local->hw, |
239 | &local->dynamic_ps_disable_work); | |
240 | } | |
241 | ||
5db1c07c LC |
242 | /* Don't restart the timer if we're not disassociated */ |
243 | if (!ifmgd->associated) | |
244 | return TX_CONTINUE; | |
245 | ||
5c1b98a5 KV |
246 | mod_timer(&local->dynamic_ps_timer, jiffies + |
247 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
248 | ||
249 | return TX_CONTINUE; | |
250 | } | |
e2ebc74d | 251 | |
d9e8a70f | 252 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 253 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 254 | { |
358c8d9d | 255 | |
e039fa4a | 256 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 257 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 258 | bool assoc = false; |
e2ebc74d | 259 | |
e039fa4a | 260 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 261 | return TX_CONTINUE; |
58d4185e | 262 | |
b23b025f BG |
263 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
264 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
265 | !ieee80211_is_probe_req(hdr->frame_control) && |
266 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
267 | /* | |
268 | * When software scanning only nullfunc frames (to notify | |
269 | * the sleep state to the AP) and probe requests (for the | |
270 | * active scan) are allowed, all other frames should not be | |
271 | * sent and we should not get here, but if we do | |
272 | * nonetheless, drop them to avoid sending them | |
273 | * off-channel. See the link below and | |
274 | * ieee80211_start_scan() for more. | |
275 | * | |
276 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
277 | */ | |
9ae54c84 | 278 | return TX_DROP; |
e2ebc74d | 279 | |
1be7fe8d BJ |
280 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
281 | return TX_CONTINUE; | |
282 | ||
05c914fe | 283 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
284 | return TX_CONTINUE; |
285 | ||
5cf121c3 | 286 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 287 | return TX_CONTINUE; |
e2ebc74d | 288 | |
c2c98fde JB |
289 | if (tx->sta) |
290 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 291 | |
5cf121c3 | 292 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 293 | if (unlikely(!assoc && |
358c8d9d | 294 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d | 295 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 JB |
296 | sdata_info(tx->sdata, |
297 | "dropped data frame to not associated station %pM\n", | |
298 | hdr->addr1); | |
299 | #endif | |
e2ebc74d | 300 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
9ae54c84 | 301 | return TX_DROP; |
e2ebc74d | 302 | } |
29623892 JB |
303 | } else if (unlikely(tx->sdata->vif.type == NL80211_IFTYPE_AP && |
304 | ieee80211_is_data(hdr->frame_control) && | |
030ef8f8 | 305 | !atomic_read(&tx->sdata->u.ap.num_mcast_sta))) { |
29623892 JB |
306 | /* |
307 | * No associated STAs - no need to send multicast | |
308 | * frames. | |
309 | */ | |
310 | return TX_DROP; | |
e2ebc74d JB |
311 | } |
312 | ||
9ae54c84 | 313 | return TX_CONTINUE; |
e2ebc74d JB |
314 | } |
315 | ||
e2ebc74d JB |
316 | /* This function is called whenever the AP is about to exceed the maximum limit |
317 | * of buffered frames for power saving STAs. This situation should not really | |
318 | * happen often during normal operation, so dropping the oldest buffered packet | |
319 | * from each queue should be OK to make some room for new frames. */ | |
320 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
321 | { | |
322 | int total = 0, purged = 0; | |
323 | struct sk_buff *skb; | |
324 | struct ieee80211_sub_if_data *sdata; | |
325 | struct sta_info *sta; | |
326 | ||
79010420 | 327 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
d012a605 MP |
328 | struct ps_data *ps; |
329 | ||
330 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
331 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
332 | else if (ieee80211_vif_is_mesh(&sdata->vif)) |
333 | ps = &sdata->u.mesh.ps; | |
d012a605 | 334 | else |
e2ebc74d | 335 | continue; |
d012a605 MP |
336 | |
337 | skb = skb_dequeue(&ps->bc_buf); | |
e2ebc74d JB |
338 | if (skb) { |
339 | purged++; | |
340 | dev_kfree_skb(skb); | |
341 | } | |
d012a605 | 342 | total += skb_queue_len(&ps->bc_buf); |
e2ebc74d | 343 | } |
e2ebc74d | 344 | |
948d887d JB |
345 | /* |
346 | * Drop one frame from each station from the lowest-priority | |
347 | * AC that has frames at all. | |
348 | */ | |
d0709a65 | 349 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
350 | int ac; |
351 | ||
352 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
353 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
354 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
355 | if (skb) { | |
356 | purged++; | |
c3e7724b | 357 | ieee80211_free_txskb(&local->hw, skb); |
948d887d JB |
358 | break; |
359 | } | |
e2ebc74d | 360 | } |
e2ebc74d | 361 | } |
d0709a65 | 362 | |
e2ebc74d | 363 | local->total_ps_buffered = total; |
bdcbd8e0 | 364 | ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged); |
e2ebc74d JB |
365 | } |
366 | ||
9ae54c84 | 367 | static ieee80211_tx_result |
5cf121c3 | 368 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 369 | { |
e039fa4a | 370 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 371 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d012a605 | 372 | struct ps_data *ps; |
e039fa4a | 373 | |
7d54d0dd JB |
374 | /* |
375 | * broadcast/multicast frame | |
376 | * | |
3f52b7e3 | 377 | * If any of the associated/peer stations is in power save mode, |
7d54d0dd JB |
378 | * the frame is buffered to be sent after DTIM beacon frame. |
379 | * This is done either by the hardware or us. | |
380 | */ | |
381 | ||
3f52b7e3 | 382 | /* powersaving STAs currently only in AP/VLAN/mesh mode */ |
d012a605 MP |
383 | if (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
384 | tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { | |
385 | if (!tx->sdata->bss) | |
386 | return TX_CONTINUE; | |
387 | ||
388 | ps = &tx->sdata->bss->ps; | |
3f52b7e3 MP |
389 | } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) { |
390 | ps = &tx->sdata->u.mesh.ps; | |
d012a605 | 391 | } else { |
3e122be0 | 392 | return TX_CONTINUE; |
d012a605 MP |
393 | } |
394 | ||
3e122be0 JB |
395 | |
396 | /* no buffering for ordered frames */ | |
358c8d9d | 397 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 398 | return TX_CONTINUE; |
7d54d0dd JB |
399 | |
400 | /* no stations in PS mode */ | |
d012a605 | 401 | if (!atomic_read(&ps->num_sta_ps)) |
9ae54c84 | 402 | return TX_CONTINUE; |
7d54d0dd | 403 | |
62b517cb | 404 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
3a25a8c8 JB |
405 | if (tx->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) |
406 | info->hw_queue = tx->sdata->vif.cab_queue; | |
62b1208e | 407 | |
62b517cb JB |
408 | /* device releases frame after DTIM beacon */ |
409 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 410 | return TX_CONTINUE; |
62b1208e | 411 | |
7d54d0dd | 412 | /* buffered in mac80211 */ |
62b1208e JB |
413 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
414 | purge_old_ps_buffers(tx->local); | |
415 | ||
d012a605 | 416 | if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) { |
bdcbd8e0 JB |
417 | ps_dbg(tx->sdata, |
418 | "BC TX buffer full - dropping the oldest frame\n"); | |
d012a605 | 419 | dev_kfree_skb(skb_dequeue(&ps->bc_buf)); |
62b1208e JB |
420 | } else |
421 | tx->local->total_ps_buffered++; | |
e2ebc74d | 422 | |
d012a605 | 423 | skb_queue_tail(&ps->bc_buf, tx->skb); |
7d54d0dd | 424 | |
62b1208e | 425 | return TX_QUEUED; |
e2ebc74d JB |
426 | } |
427 | ||
fb733336 JM |
428 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
429 | struct sk_buff *skb) | |
430 | { | |
431 | if (!ieee80211_is_mgmt(fc)) | |
432 | return 0; | |
433 | ||
c2c98fde | 434 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
435 | return 0; |
436 | ||
437 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
438 | skb->data)) | |
439 | return 0; | |
440 | ||
441 | return 1; | |
442 | } | |
443 | ||
9ae54c84 | 444 | static ieee80211_tx_result |
5cf121c3 | 445 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
446 | { |
447 | struct sta_info *sta = tx->sta; | |
e039fa4a | 448 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 449 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 450 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 451 | |
02f2f1a9 | 452 | if (unlikely(!sta)) |
9ae54c84 | 453 | return TX_CONTINUE; |
e2ebc74d | 454 | |
c2c98fde JB |
455 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
456 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && | |
02f2f1a9 | 457 | !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) { |
948d887d JB |
458 | int ac = skb_get_queue_mapping(tx->skb); |
459 | ||
02f2f1a9 JB |
460 | /* only deauth, disassoc and action are bufferable MMPDUs */ |
461 | if (ieee80211_is_mgmt(hdr->frame_control) && | |
462 | !ieee80211_is_deauth(hdr->frame_control) && | |
463 | !ieee80211_is_disassoc(hdr->frame_control) && | |
464 | !ieee80211_is_action(hdr->frame_control)) { | |
465 | info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER; | |
466 | return TX_CONTINUE; | |
467 | } | |
468 | ||
bdcbd8e0 JB |
469 | ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n", |
470 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d JB |
471 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
472 | purge_old_ps_buffers(tx->local); | |
948d887d JB |
473 | if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) { |
474 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]); | |
bdcbd8e0 JB |
475 | ps_dbg(tx->sdata, |
476 | "STA %pM TX buffer for AC %d full - dropping oldest frame\n", | |
477 | sta->sta.addr, ac); | |
c3e7724b | 478 | ieee80211_free_txskb(&local->hw, old); |
e2ebc74d JB |
479 | } else |
480 | tx->local->total_ps_buffered++; | |
004c872e | 481 | |
e039fa4a | 482 | info->control.jiffies = jiffies; |
5061b0c2 | 483 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 484 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
948d887d | 485 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
3393a608 JO |
486 | |
487 | if (!timer_pending(&local->sta_cleanup)) | |
488 | mod_timer(&local->sta_cleanup, | |
489 | round_jiffies(jiffies + | |
490 | STA_INFO_CLEANUP_INTERVAL)); | |
491 | ||
c868cb35 JB |
492 | /* |
493 | * We queued up some frames, so the TIM bit might | |
494 | * need to be set, recalculate it. | |
495 | */ | |
496 | sta_info_recalc_tim(sta); | |
497 | ||
9ae54c84 | 498 | return TX_QUEUED; |
bdcbd8e0 JB |
499 | } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
500 | ps_dbg(tx->sdata, | |
501 | "STA %pM in PS mode, but polling/in SP -> send frame\n", | |
502 | sta->sta.addr); | |
e2ebc74d | 503 | } |
e2ebc74d | 504 | |
9ae54c84 | 505 | return TX_CONTINUE; |
e2ebc74d JB |
506 | } |
507 | ||
d9e8a70f | 508 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 509 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 510 | { |
5cf121c3 | 511 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 512 | return TX_CONTINUE; |
e2ebc74d | 513 | |
5cf121c3 | 514 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
515 | return ieee80211_tx_h_unicast_ps_buf(tx); |
516 | else | |
517 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
518 | } | |
519 | ||
a621fa4d JB |
520 | static ieee80211_tx_result debug_noinline |
521 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
522 | { | |
523 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
524 | ||
525 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
526 | tx->sdata->control_port_no_encrypt)) | |
527 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
528 | ||
529 | return TX_CONTINUE; | |
530 | } | |
531 | ||
d9e8a70f | 532 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 533 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 534 | { |
46e6de15 | 535 | struct ieee80211_key *key; |
e039fa4a | 536 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 537 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 538 | |
3b8d81e0 | 539 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 540 | tx->key = NULL; |
e31b8213 | 541 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 542 | tx->key = key; |
3cfcf6ac | 543 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
544 | is_multicast_ether_addr(hdr->addr1) && |
545 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
546 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
547 | tx->key = key; | |
f7e0104c JB |
548 | else if (is_multicast_ether_addr(hdr->addr1) && |
549 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
550 | tx->key = key; | |
551 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
552 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 553 | tx->key = key; |
46e6de15 JB |
554 | else if (info->flags & IEEE80211_TX_CTL_INJECTED) |
555 | tx->key = NULL; | |
556 | else if (!tx->sdata->drop_unencrypted) | |
557 | tx->key = NULL; | |
558 | else if (tx->skb->protocol == tx->sdata->control_port_protocol) | |
559 | tx->key = NULL; | |
560 | else if (ieee80211_is_robust_mgmt_frame(hdr) && | |
561 | !(ieee80211_is_action(hdr->frame_control) && | |
562 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP))) | |
563 | tx->key = NULL; | |
4922f71f NC |
564 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
565 | !ieee80211_is_robust_mgmt_frame(hdr)) | |
566 | tx->key = NULL; | |
46e6de15 | 567 | else { |
e2ebc74d | 568 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 569 | return TX_DROP; |
46e6de15 | 570 | } |
e2ebc74d JB |
571 | |
572 | if (tx->key) { | |
813d7669 JB |
573 | bool skip_hw = false; |
574 | ||
e2ebc74d | 575 | tx->key->tx_rx_count++; |
011bfcc4 | 576 | /* TODO: add threshold stuff again */ |
176e4f84 | 577 | |
97359d12 JB |
578 | switch (tx->key->conf.cipher) { |
579 | case WLAN_CIPHER_SUITE_WEP40: | |
580 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 581 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 582 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
583 | tx->key = NULL; |
584 | break; | |
97359d12 | 585 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
586 | if (!ieee80211_is_data_present(hdr->frame_control) && |
587 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
588 | tx->skb)) | |
589 | tx->key = NULL; | |
3b43a187 KV |
590 | else |
591 | skip_hw = (tx->key->conf.flags & | |
e548c49e | 592 | IEEE80211_KEY_FLAG_SW_MGMT_TX) && |
3b43a187 | 593 | ieee80211_is_mgmt(hdr->frame_control); |
fb733336 | 594 | break; |
97359d12 | 595 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
596 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
597 | tx->key = NULL; | |
598 | break; | |
176e4f84 | 599 | } |
813d7669 | 600 | |
e54faf29 JB |
601 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED && |
602 | !ieee80211_is_deauth(hdr->frame_control))) | |
95acac61 JB |
603 | return TX_DROP; |
604 | ||
f12553eb | 605 | if (!skip_hw && tx->key && |
382b1655 | 606 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 607 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
608 | } |
609 | ||
9ae54c84 | 610 | return TX_CONTINUE; |
e2ebc74d JB |
611 | } |
612 | ||
d9e8a70f | 613 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 614 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 615 | { |
e039fa4a | 616 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
617 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
618 | struct ieee80211_supported_band *sband; | |
619 | struct ieee80211_rate *rate; | |
a2c40249 SZ |
620 | int i; |
621 | u32 len; | |
e6a9854b JB |
622 | bool inval = false, rts = false, short_preamble = false; |
623 | struct ieee80211_tx_rate_control txrc; | |
c2c98fde | 624 | bool assoc = false; |
8318d78a | 625 | |
e6a9854b | 626 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 627 | |
2d56577b | 628 | sband = tx->local->hw.wiphy->bands[info->band]; |
58d4185e | 629 | |
a2c40249 | 630 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 631 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
632 | |
633 | /* set up the tx rate control struct we give the RC algo */ | |
005e472b | 634 | txrc.hw = &tx->local->hw; |
e6a9854b JB |
635 | txrc.sband = sband; |
636 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
637 | txrc.skb = tx->skb; | |
638 | txrc.reported_rate.idx = -1; | |
2d56577b | 639 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; |
37eb0b16 JM |
640 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) |
641 | txrc.max_rate_idx = -1; | |
642 | else | |
643 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
19468413 | 644 | memcpy(txrc.rate_idx_mcs_mask, |
2d56577b | 645 | tx->sdata->rc_rateidx_mcs_mask[info->band], |
19468413 | 646 | sizeof(txrc.rate_idx_mcs_mask)); |
8f0729b1 | 647 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
4bb62344 | 648 | tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || |
8f0729b1 | 649 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); |
e6a9854b JB |
650 | |
651 | /* set up RTS protection if desired */ | |
b9a5f8ca | 652 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 653 | txrc.rts = rts = true; |
e2ebc74d | 654 | } |
e2ebc74d | 655 | |
e6a9854b JB |
656 | /* |
657 | * Use short preamble if the BSS can handle it, but not for | |
658 | * management frames unless we know the receiver can handle | |
659 | * that -- the management frame might be to a station that | |
660 | * just wants a probe response. | |
661 | */ | |
662 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
663 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 664 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
e6a9854b | 665 | txrc.short_preamble = short_preamble = true; |
e2ebc74d | 666 | |
c2c98fde JB |
667 | if (tx->sta) |
668 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
669 | |
670 | /* | |
671 | * Lets not bother rate control if we're associated and cannot | |
672 | * talk to the sta. This should not happen. | |
673 | */ | |
c2c98fde | 674 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
675 | !rate_usable_index_exists(sband, &tx->sta->sta), |
676 | "%s: Dropped data frame as no usable bitrate found while " | |
677 | "scanning and associated. Target station: " | |
678 | "%pM on %d GHz band\n", | |
47846c9b | 679 | tx->sdata->name, hdr->addr1, |
2d56577b | 680 | info->band ? 5 : 2)) |
b770b43e | 681 | return TX_DROP; |
2e92e6f2 | 682 | |
b770b43e LR |
683 | /* |
684 | * If we're associated with the sta at this point we know we can at | |
685 | * least send the frame at the lowest bit rate. | |
686 | */ | |
e6a9854b JB |
687 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
688 | ||
689 | if (unlikely(info->control.rates[0].idx < 0)) | |
690 | return TX_DROP; | |
691 | ||
c1ce5a74 | 692 | if (txrc.reported_rate.idx < 0) { |
e6a9854b | 693 | txrc.reported_rate = info->control.rates[0]; |
c1ce5a74 HS |
694 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
695 | tx->sta->last_tx_rate = txrc.reported_rate; | |
696 | } else if (tx->sta) | |
e6a9854b | 697 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 698 | |
e6a9854b JB |
699 | if (unlikely(!info->control.rates[0].count)) |
700 | info->control.rates[0].count = 1; | |
e2ebc74d | 701 | |
9955151d GS |
702 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
703 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
704 | info->control.rates[0].count = 1; | |
705 | ||
e6a9854b JB |
706 | if (is_multicast_ether_addr(hdr->addr1)) { |
707 | /* | |
708 | * XXX: verify the rate is in the basic rateset | |
709 | */ | |
710 | return TX_CONTINUE; | |
e2ebc74d JB |
711 | } |
712 | ||
e6a9854b JB |
713 | /* |
714 | * set up the RTS/CTS rate as the fastest basic rate | |
715 | * that is not faster than the data rate | |
716 | * | |
717 | * XXX: Should this check all retry rates? | |
718 | */ | |
719 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
720 | s8 baserate = 0; | |
721 | ||
722 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
723 | ||
724 | for (i = 0; i < sband->n_bitrates; i++) { | |
725 | /* must be a basic rate */ | |
726 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
727 | continue; | |
728 | /* must not be faster than the data rate */ | |
729 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
730 | continue; | |
731 | /* maximum */ | |
732 | if (sband->bitrates[baserate].bitrate < | |
733 | sband->bitrates[i].bitrate) | |
734 | baserate = i; | |
735 | } | |
736 | ||
737 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
738 | } |
739 | ||
e6a9854b JB |
740 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
741 | /* | |
742 | * make sure there's no valid rate following | |
743 | * an invalid one, just in case drivers don't | |
744 | * take the API seriously to stop at -1. | |
745 | */ | |
746 | if (inval) { | |
747 | info->control.rates[i].idx = -1; | |
748 | continue; | |
749 | } | |
750 | if (info->control.rates[i].idx < 0) { | |
751 | inval = true; | |
752 | continue; | |
753 | } | |
8318d78a | 754 | |
e6a9854b JB |
755 | /* |
756 | * For now assume MCS is already set up correctly, this | |
757 | * needs to be fixed. | |
758 | */ | |
759 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
760 | WARN_ON(info->control.rates[i].idx > 76); | |
761 | continue; | |
762 | } | |
e2ebc74d | 763 | |
e6a9854b JB |
764 | /* set up RTS protection if desired */ |
765 | if (rts) | |
766 | info->control.rates[i].flags |= | |
767 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 768 | |
e6a9854b | 769 | /* RC is busted */ |
075cbc9e S |
770 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
771 | sband->n_bitrates)) { | |
e6a9854b JB |
772 | info->control.rates[i].idx = -1; |
773 | continue; | |
8318d78a | 774 | } |
e2ebc74d | 775 | |
e6a9854b JB |
776 | rate = &sband->bitrates[info->control.rates[i].idx]; |
777 | ||
778 | /* set up short preamble */ | |
779 | if (short_preamble && | |
780 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
781 | info->control.rates[i].flags |= | |
782 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
783 | ||
784 | /* set up G protection */ | |
785 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
786 | rate->flags & IEEE80211_RATE_ERP_G) | |
787 | info->control.rates[i].flags |= | |
788 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
789 | } |
790 | ||
e6a9854b JB |
791 | return TX_CONTINUE; |
792 | } | |
793 | ||
f591fa5d JB |
794 | static ieee80211_tx_result debug_noinline |
795 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
796 | { | |
797 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
798 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
799 | u16 *seq; | |
800 | u8 *qc; | |
801 | int tid; | |
802 | ||
25d834e1 JB |
803 | /* |
804 | * Packet injection may want to control the sequence | |
805 | * number, if we have no matching interface then we | |
806 | * neither assign one ourselves nor ask the driver to. | |
807 | */ | |
5061b0c2 | 808 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
809 | return TX_CONTINUE; |
810 | ||
f591fa5d JB |
811 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
812 | return TX_CONTINUE; | |
813 | ||
814 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
815 | return TX_CONTINUE; | |
816 | ||
49a59543 JB |
817 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
818 | return TX_CONTINUE; | |
819 | ||
94778280 JB |
820 | /* |
821 | * Anything but QoS data that has a sequence number field | |
822 | * (is long enough) gets a sequence number from the global | |
823 | * counter. | |
824 | */ | |
f591fa5d | 825 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 826 | /* driver should assign sequence number */ |
f591fa5d | 827 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
828 | /* for pure STA mode without beacons, we can do it */ |
829 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
830 | tx->sdata->sequence_number += 0x10; | |
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; | |
846 | seq = &tx->sta->tid_seq[tid]; | |
847 | ||
848 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
849 | ||
850 | /* Increase the sequence number. */ | |
851 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
852 | ||
853 | return TX_CONTINUE; | |
854 | } | |
855 | ||
252b86c4 | 856 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
857 | struct sk_buff *skb, int hdrlen, |
858 | int frag_threshold) | |
859 | { | |
252b86c4 | 860 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 861 | struct ieee80211_tx_info *info; |
252b86c4 | 862 | struct sk_buff *tmp; |
2de8e0d9 JB |
863 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
864 | int pos = hdrlen + per_fragm; | |
865 | int rem = skb->len - hdrlen - per_fragm; | |
866 | ||
867 | if (WARN_ON(rem < 0)) | |
868 | return -EINVAL; | |
869 | ||
252b86c4 JB |
870 | /* first fragment was already added to queue by caller */ |
871 | ||
2de8e0d9 JB |
872 | while (rem) { |
873 | int fraglen = per_fragm; | |
874 | ||
875 | if (fraglen > rem) | |
876 | fraglen = rem; | |
877 | rem -= fraglen; | |
878 | tmp = dev_alloc_skb(local->tx_headroom + | |
879 | frag_threshold + | |
880 | IEEE80211_ENCRYPT_HEADROOM + | |
881 | IEEE80211_ENCRYPT_TAILROOM); | |
882 | if (!tmp) | |
883 | return -ENOMEM; | |
252b86c4 JB |
884 | |
885 | __skb_queue_tail(&tx->skbs, tmp); | |
886 | ||
2de8e0d9 JB |
887 | skb_reserve(tmp, local->tx_headroom + |
888 | IEEE80211_ENCRYPT_HEADROOM); | |
889 | /* copy control information */ | |
890 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
891 | |
892 | info = IEEE80211_SKB_CB(tmp); | |
893 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
894 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
895 | ||
896 | if (rem) | |
897 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
898 | ||
2de8e0d9 JB |
899 | skb_copy_queue_mapping(tmp, skb); |
900 | tmp->priority = skb->priority; | |
2de8e0d9 | 901 | tmp->dev = skb->dev; |
2de8e0d9 JB |
902 | |
903 | /* copy header and data */ | |
904 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
905 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
906 | ||
907 | pos += fraglen; | |
908 | } | |
909 | ||
252b86c4 | 910 | /* adjust first fragment's length */ |
2de8e0d9 JB |
911 | skb->len = hdrlen + per_fragm; |
912 | return 0; | |
913 | } | |
914 | ||
d9e8a70f | 915 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
916 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
917 | { | |
2de8e0d9 JB |
918 | struct sk_buff *skb = tx->skb; |
919 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
920 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 921 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
922 | int hdrlen; |
923 | int fragnum; | |
e2454948 | 924 | |
252b86c4 JB |
925 | /* no matter what happens, tx->skb moves to tx->skbs */ |
926 | __skb_queue_tail(&tx->skbs, skb); | |
927 | tx->skb = NULL; | |
928 | ||
a26eb27a JB |
929 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
930 | return TX_CONTINUE; | |
931 | ||
932 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
933 | return TX_CONTINUE; |
934 | ||
eefce91a JB |
935 | /* |
936 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 937 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 938 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 939 | */ |
8b30b1fe | 940 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
941 | return TX_DROP; |
942 | ||
065e9605 | 943 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 944 | |
a26eb27a | 945 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 946 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 947 | return TX_DROP; |
e6a9854b | 948 | |
2de8e0d9 JB |
949 | /* |
950 | * Now fragment the frame. This will allocate all the fragments and | |
951 | * chain them (using skb as the first fragment) to skb->next. | |
952 | * During transmission, we will remove the successfully transmitted | |
953 | * fragments from this list. When the low-level driver rejects one | |
954 | * of the fragments then we will simply pretend to accept the skb | |
955 | * but store it away as pending. | |
956 | */ | |
252b86c4 | 957 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 958 | return TX_DROP; |
e6a9854b | 959 | |
2de8e0d9 JB |
960 | /* update duration/seq/flags of fragments */ |
961 | fragnum = 0; | |
252b86c4 JB |
962 | |
963 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 | 964 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
e6a9854b | 965 | |
2de8e0d9 JB |
966 | hdr = (void *)skb->data; |
967 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 968 | |
252b86c4 | 969 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 970 | hdr->frame_control |= morefrags; |
e6a9854b JB |
971 | /* |
972 | * No multi-rate retries for fragmented frames, that | |
973 | * would completely throw off the NAV at other STAs. | |
974 | */ | |
975 | info->control.rates[1].idx = -1; | |
976 | info->control.rates[2].idx = -1; | |
977 | info->control.rates[3].idx = -1; | |
e3e1a0bc | 978 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4); |
e6a9854b | 979 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; |
2de8e0d9 JB |
980 | } else { |
981 | hdr->frame_control &= ~morefrags; | |
e6a9854b | 982 | } |
2de8e0d9 JB |
983 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
984 | fragnum++; | |
252b86c4 | 985 | } |
e2ebc74d | 986 | |
9ae54c84 | 987 | return TX_CONTINUE; |
e2ebc74d JB |
988 | } |
989 | ||
feff1f2f JB |
990 | static ieee80211_tx_result debug_noinline |
991 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
992 | { | |
252b86c4 | 993 | struct sk_buff *skb; |
feff1f2f JB |
994 | |
995 | if (!tx->sta) | |
996 | return TX_CONTINUE; | |
997 | ||
998 | tx->sta->tx_packets++; | |
252b86c4 | 999 | skb_queue_walk(&tx->skbs, skb) { |
feff1f2f JB |
1000 | tx->sta->tx_fragments++; |
1001 | tx->sta->tx_bytes += skb->len; | |
252b86c4 | 1002 | } |
feff1f2f JB |
1003 | |
1004 | return TX_CONTINUE; | |
1005 | } | |
1006 | ||
d9e8a70f | 1007 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1008 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1009 | { | |
1010 | if (!tx->key) | |
1011 | return TX_CONTINUE; | |
1012 | ||
97359d12 JB |
1013 | switch (tx->key->conf.cipher) { |
1014 | case WLAN_CIPHER_SUITE_WEP40: | |
1015 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1016 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1017 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1018 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1019 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 1020 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 1021 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1022 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 | 1023 | default: |
d32a1028 | 1024 | return ieee80211_crypto_hw_encrypt(tx); |
e2454948 JB |
1025 | } |
1026 | ||
e2454948 JB |
1027 | return TX_DROP; |
1028 | } | |
1029 | ||
d9e8a70f | 1030 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1031 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1032 | { | |
252b86c4 | 1033 | struct sk_buff *skb; |
2de8e0d9 JB |
1034 | struct ieee80211_hdr *hdr; |
1035 | int next_len; | |
1036 | bool group_addr; | |
03f93c3d | 1037 | |
252b86c4 | 1038 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1039 | hdr = (void *) skb->data; |
7e0aae47 JM |
1040 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1041 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1042 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1043 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1044 | next_len = next->len; | |
1045 | } else | |
1046 | next_len = 0; | |
2de8e0d9 | 1047 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1048 | |
2de8e0d9 | 1049 | hdr->duration_id = |
252b86c4 JB |
1050 | ieee80211_duration(tx, skb, group_addr, next_len); |
1051 | } | |
03f93c3d JB |
1052 | |
1053 | return TX_CONTINUE; | |
1054 | } | |
1055 | ||
e2ebc74d JB |
1056 | /* actual transmit path */ |
1057 | ||
a622ab72 JB |
1058 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1059 | struct sk_buff *skb, | |
1060 | struct ieee80211_tx_info *info, | |
1061 | struct tid_ampdu_tx *tid_tx, | |
1062 | int tid) | |
1063 | { | |
1064 | bool queued = false; | |
285fa695 | 1065 | bool reset_agg_timer = false; |
aa454580 | 1066 | struct sk_buff *purge_skb = NULL; |
a622ab72 JB |
1067 | |
1068 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1069 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1070 | reset_agg_timer = true; |
0ab33703 JB |
1071 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1072 | /* | |
1073 | * nothing -- this aggregation session is being started | |
1074 | * but that might still fail with the driver | |
1075 | */ | |
a622ab72 JB |
1076 | } else { |
1077 | spin_lock(&tx->sta->lock); | |
1078 | /* | |
1079 | * Need to re-check now, because we may get here | |
1080 | * | |
1081 | * 1) in the window during which the setup is actually | |
1082 | * already done, but not marked yet because not all | |
1083 | * packets are spliced over to the driver pending | |
1084 | * queue yet -- if this happened we acquire the lock | |
1085 | * either before or after the splice happens, but | |
1086 | * need to recheck which of these cases happened. | |
1087 | * | |
1088 | * 2) during session teardown, if the OPERATIONAL bit | |
1089 | * was cleared due to the teardown but the pointer | |
1090 | * hasn't been assigned NULL yet (or we loaded it | |
1091 | * before it was assigned) -- in this case it may | |
1092 | * now be NULL which means we should just let the | |
1093 | * packet pass through because splicing the frames | |
1094 | * back is already done. | |
1095 | */ | |
40b275b6 | 1096 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1097 | |
1098 | if (!tid_tx) { | |
1099 | /* do nothing, let packet pass through */ | |
1100 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1101 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1102 | reset_agg_timer = true; |
a622ab72 JB |
1103 | } else { |
1104 | queued = true; | |
1105 | info->control.vif = &tx->sdata->vif; | |
1106 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1107 | __skb_queue_tail(&tid_tx->pending, skb); | |
aa454580 HS |
1108 | if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER) |
1109 | purge_skb = __skb_dequeue(&tid_tx->pending); | |
a622ab72 JB |
1110 | } |
1111 | spin_unlock(&tx->sta->lock); | |
aa454580 HS |
1112 | |
1113 | if (purge_skb) | |
c3e7724b | 1114 | ieee80211_free_txskb(&tx->local->hw, purge_skb); |
a622ab72 JB |
1115 | } |
1116 | ||
285fa695 NM |
1117 | /* reset session timer */ |
1118 | if (reset_agg_timer && tid_tx->timeout) | |
12d3952f | 1119 | tid_tx->last_tx = jiffies; |
285fa695 | 1120 | |
a622ab72 JB |
1121 | return queued; |
1122 | } | |
1123 | ||
58d4185e JB |
1124 | /* |
1125 | * initialises @tx | |
1126 | */ | |
9ae54c84 | 1127 | static ieee80211_tx_result |
3b8d81e0 JB |
1128 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1129 | struct ieee80211_tx_data *tx, | |
1130 | struct sk_buff *skb) | |
e2ebc74d | 1131 | { |
3b8d81e0 | 1132 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1133 | struct ieee80211_hdr *hdr; |
e039fa4a | 1134 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
68f2b517 | 1135 | int tid; |
a622ab72 | 1136 | u8 *qc; |
e2ebc74d JB |
1137 | |
1138 | memset(tx, 0, sizeof(*tx)); | |
1139 | tx->skb = skb; | |
e2ebc74d | 1140 | tx->local = local; |
3b8d81e0 | 1141 | tx->sdata = sdata; |
252b86c4 | 1142 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1143 | |
cd8ffc80 JB |
1144 | /* |
1145 | * If this flag is set to true anywhere, and we get here, | |
1146 | * we are doing the needed processing, so remove the flag | |
1147 | * now. | |
1148 | */ | |
1149 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1150 | ||
58d4185e JB |
1151 | hdr = (struct ieee80211_hdr *) skb->data; |
1152 | ||
3f0e0b22 | 1153 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1154 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1155 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1156 | return TX_DROP; | |
66f2c99a FF |
1157 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED || |
1158 | tx->sdata->control_port_protocol == tx->skb->protocol) { | |
b4d57adb | 1159 | tx->sta = sta_info_get_bss(sdata, hdr->addr1); |
3f0e0b22 | 1160 | } |
f14543ee | 1161 | if (!tx->sta) |
abe60632 | 1162 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1163 | |
cd8ffc80 | 1164 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
49a59543 | 1165 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && |
edf6b784 AN |
1166 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) && |
1167 | !(local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) { | |
cd8ffc80 JB |
1168 | struct tid_ampdu_tx *tid_tx; |
1169 | ||
8b30b1fe S |
1170 | qc = ieee80211_get_qos_ctl(hdr); |
1171 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1172 | ||
a622ab72 JB |
1173 | tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]); |
1174 | if (tid_tx) { | |
1175 | bool queued; | |
cd8ffc80 | 1176 | |
a622ab72 JB |
1177 | queued = ieee80211_tx_prep_agg(tx, skb, info, |
1178 | tid_tx, tid); | |
1179 | ||
1180 | if (unlikely(queued)) | |
1181 | return TX_QUEUED; | |
1182 | } | |
8b30b1fe S |
1183 | } |
1184 | ||
badffb72 | 1185 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1186 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1187 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
6fd67e93 | 1188 | } else |
5cf121c3 | 1189 | tx->flags |= IEEE80211_TX_UNICAST; |
58d4185e | 1190 | |
a26eb27a JB |
1191 | if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) { |
1192 | if (!(tx->flags & IEEE80211_TX_UNICAST) || | |
1193 | skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold || | |
1194 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
1195 | info->flags |= IEEE80211_TX_CTL_DONTFRAG; | |
58d4185e JB |
1196 | } |
1197 | ||
e2ebc74d | 1198 | if (!tx->sta) |
e039fa4a | 1199 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
c2c98fde | 1200 | else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1201 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1202 | |
e039fa4a | 1203 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1204 | |
9ae54c84 | 1205 | return TX_CONTINUE; |
e2ebc74d JB |
1206 | } |
1207 | ||
11127e91 JB |
1208 | static bool ieee80211_tx_frags(struct ieee80211_local *local, |
1209 | struct ieee80211_vif *vif, | |
1210 | struct ieee80211_sta *sta, | |
1211 | struct sk_buff_head *skbs, | |
1212 | bool txpending) | |
e2ebc74d | 1213 | { |
36323f81 | 1214 | struct ieee80211_tx_control control; |
252b86c4 | 1215 | struct sk_buff *skb, *tmp; |
3b8d81e0 | 1216 | unsigned long flags; |
e2ebc74d | 1217 | |
252b86c4 | 1218 | skb_queue_walk_safe(skbs, skb, tmp) { |
3a25a8c8 JB |
1219 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1220 | int q = info->hw_queue; | |
1221 | ||
1222 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1223 | if (WARN_ON_ONCE(q >= local->hw.queues)) { | |
1224 | __skb_unlink(skb, skbs); | |
c3e7724b | 1225 | ieee80211_free_txskb(&local->hw, skb); |
3a25a8c8 JB |
1226 | continue; |
1227 | } | |
1228 | #endif | |
3b8d81e0 JB |
1229 | |
1230 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1231 | if (local->queue_stop_reasons[q] || |
7bb45683 | 1232 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
6c17b77b | 1233 | if (unlikely(info->flags & |
a7679ed5 SF |
1234 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) { |
1235 | if (local->queue_stop_reasons[q] & | |
1236 | ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) { | |
1237 | /* | |
1238 | * Drop off-channel frames if queues | |
1239 | * are stopped for any reason other | |
1240 | * than off-channel operation. Never | |
1241 | * queue them. | |
1242 | */ | |
1243 | spin_unlock_irqrestore( | |
1244 | &local->queue_stop_reason_lock, | |
1245 | flags); | |
1246 | ieee80211_purge_tx_queue(&local->hw, | |
1247 | skbs); | |
1248 | return true; | |
1249 | } | |
1250 | } else { | |
1251 | ||
6c17b77b | 1252 | /* |
a7679ed5 SF |
1253 | * Since queue is stopped, queue up frames for |
1254 | * later transmission from the tx-pending | |
1255 | * tasklet when the queue is woken again. | |
6c17b77b | 1256 | */ |
a7679ed5 SF |
1257 | if (txpending) |
1258 | skb_queue_splice_init(skbs, | |
1259 | &local->pending[q]); | |
1260 | else | |
1261 | skb_queue_splice_tail_init(skbs, | |
1262 | &local->pending[q]); | |
1263 | ||
1264 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1265 | flags); | |
1266 | return false; | |
6c17b77b | 1267 | } |
7bb45683 | 1268 | } |
3b8d81e0 | 1269 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1270 | |
11127e91 | 1271 | info->control.vif = vif; |
36323f81 | 1272 | control.sta = sta; |
f0e72851 | 1273 | |
11127e91 | 1274 | __skb_unlink(skb, skbs); |
36323f81 | 1275 | drv_tx(local, &control, skb); |
11127e91 | 1276 | } |
5061b0c2 | 1277 | |
11127e91 JB |
1278 | return true; |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1283 | */ | |
1284 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1285 | struct sk_buff_head *skbs, int led_len, | |
1286 | struct sta_info *sta, bool txpending) | |
1287 | { | |
1288 | struct ieee80211_tx_info *info; | |
1289 | struct ieee80211_sub_if_data *sdata; | |
1290 | struct ieee80211_vif *vif; | |
1291 | struct ieee80211_sta *pubsta; | |
1292 | struct sk_buff *skb; | |
1293 | bool result = true; | |
1294 | __le16 fc; | |
5061b0c2 | 1295 | |
11127e91 JB |
1296 | if (WARN_ON(skb_queue_empty(skbs))) |
1297 | return true; | |
ec25acc4 | 1298 | |
11127e91 JB |
1299 | skb = skb_peek(skbs); |
1300 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1301 | info = IEEE80211_SKB_CB(skb); | |
1302 | sdata = vif_to_sdata(info->control.vif); | |
1303 | if (sta && !sta->uploaded) | |
1304 | sta = NULL; | |
1305 | ||
1306 | if (sta) | |
1307 | pubsta = &sta->sta; | |
1308 | else | |
1309 | pubsta = NULL; | |
1310 | ||
1311 | switch (sdata->vif.type) { | |
1312 | case NL80211_IFTYPE_MONITOR: | |
4b6f1dd6 | 1313 | sdata = rcu_dereference(local->monitor_sdata); |
3a25a8c8 | 1314 | if (sdata) { |
4b6f1dd6 | 1315 | vif = &sdata->vif; |
3a25a8c8 JB |
1316 | info->hw_queue = |
1317 | vif->hw_queue[skb_get_queue_mapping(skb)]; | |
1318 | } else if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) { | |
1319 | dev_kfree_skb(skb); | |
1320 | return true; | |
1321 | } else | |
4b6f1dd6 | 1322 | vif = NULL; |
11127e91 JB |
1323 | break; |
1324 | case NL80211_IFTYPE_AP_VLAN: | |
1325 | sdata = container_of(sdata->bss, | |
1326 | struct ieee80211_sub_if_data, u.ap); | |
1327 | /* fall through */ | |
1328 | default: | |
1329 | vif = &sdata->vif; | |
1330 | break; | |
e2ebc74d | 1331 | } |
2de8e0d9 | 1332 | |
cb831b53 JB |
1333 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, |
1334 | txpending); | |
11127e91 | 1335 | |
74e4dbfd JB |
1336 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
1337 | ieee80211_led_tx(local, 1); | |
1338 | ||
4db4e0a1 | 1339 | WARN_ON_ONCE(!skb_queue_empty(skbs)); |
252b86c4 | 1340 | |
11127e91 | 1341 | return result; |
e2ebc74d JB |
1342 | } |
1343 | ||
97b045d6 JB |
1344 | /* |
1345 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1346 | * frame was dropped or queued. | |
1347 | */ | |
1348 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1349 | { | |
252b86c4 | 1350 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1351 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1352 | |
9aa4aee3 JB |
1353 | #define CALL_TXH(txh) \ |
1354 | do { \ | |
1355 | res = txh(tx); \ | |
1356 | if (res != TX_CONTINUE) \ | |
1357 | goto txh_done; \ | |
1358 | } while (0) | |
1359 | ||
5c1b98a5 | 1360 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1361 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1362 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1363 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1364 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1365 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1366 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc | 1367 | |
aa5b5492 JB |
1368 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) { |
1369 | __skb_queue_tail(&tx->skbs, tx->skb); | |
1370 | tx->skb = NULL; | |
c6fcf6bc | 1371 | goto txh_done; |
aa5b5492 | 1372 | } |
c6fcf6bc JB |
1373 | |
1374 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1375 | CALL_TXH(ieee80211_tx_h_sequence); |
1376 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1377 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1378 | CALL_TXH(ieee80211_tx_h_stats); |
1379 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1380 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1381 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1382 | #undef CALL_TXH |
97b045d6 | 1383 | |
d9e8a70f | 1384 | txh_done: |
97b045d6 | 1385 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1386 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 | 1387 | if (tx->skb) |
c3e7724b | 1388 | ieee80211_free_txskb(&tx->local->hw, tx->skb); |
252b86c4 | 1389 | else |
1f98ab7f | 1390 | ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs); |
97b045d6 JB |
1391 | return -1; |
1392 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1393 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1394 | return -1; |
1395 | } | |
1396 | ||
1397 | return 0; | |
1398 | } | |
1399 | ||
7bb45683 JB |
1400 | /* |
1401 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1402 | */ | |
1403 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
55de908a JB |
1404 | struct sk_buff *skb, bool txpending, |
1405 | enum ieee80211_band band) | |
e2ebc74d | 1406 | { |
3b8d81e0 | 1407 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1408 | struct ieee80211_tx_data tx; |
97b045d6 | 1409 | ieee80211_tx_result res_prepare; |
e039fa4a | 1410 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1411 | bool result = true; |
74e4dbfd | 1412 | int led_len; |
e2ebc74d | 1413 | |
e2ebc74d JB |
1414 | if (unlikely(skb->len < 10)) { |
1415 | dev_kfree_skb(skb); | |
7bb45683 | 1416 | return true; |
e2ebc74d JB |
1417 | } |
1418 | ||
58d4185e | 1419 | /* initialises tx */ |
74e4dbfd | 1420 | led_len = skb->len; |
3b8d81e0 | 1421 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1422 | |
cd8ffc80 | 1423 | if (unlikely(res_prepare == TX_DROP)) { |
c3e7724b | 1424 | ieee80211_free_txskb(&local->hw, skb); |
55de908a | 1425 | return true; |
cd8ffc80 | 1426 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
55de908a | 1427 | return true; |
e2ebc74d JB |
1428 | } |
1429 | ||
55de908a | 1430 | info->band = band; |
e2ebc74d | 1431 | |
3a25a8c8 JB |
1432 | /* set up hw_queue value early */ |
1433 | if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || | |
1434 | !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) | |
1435 | info->hw_queue = | |
1436 | sdata->vif.hw_queue[skb_get_queue_mapping(skb)]; | |
1437 | ||
7bb45683 | 1438 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1439 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1440 | tx.sta, txpending); | |
55de908a | 1441 | |
7bb45683 | 1442 | return result; |
e2ebc74d JB |
1443 | } |
1444 | ||
1445 | /* device xmit handlers */ | |
1446 | ||
3bff1865 | 1447 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1448 | struct sk_buff *skb, |
1449 | int head_need, bool may_encrypt) | |
1450 | { | |
3bff1865 | 1451 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1452 | int tail_need = 0; |
1453 | ||
3bff1865 | 1454 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1455 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1456 | tail_need -= skb_tailroom(skb); | |
1457 | tail_need = max_t(int, tail_need, 0); | |
1458 | } | |
1459 | ||
fc7c976d | 1460 | if (skb_cloned(skb)) |
23c0752a | 1461 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1462 | else if (head_need || tail_need) |
23c0752a | 1463 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1464 | else |
1465 | return 0; | |
23c0752a JB |
1466 | |
1467 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1468 | wiphy_debug(local->hw.wiphy, |
1469 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1470 | return -ENOMEM; |
1471 | } | |
1472 | ||
23c0752a JB |
1473 | return 0; |
1474 | } | |
1475 | ||
55de908a JB |
1476 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, |
1477 | enum ieee80211_band band) | |
e2ebc74d | 1478 | { |
3b8d81e0 | 1479 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1480 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1481 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1482 | int headroom; |
23c0752a | 1483 | bool may_encrypt; |
e2ebc74d | 1484 | |
3b8d81e0 | 1485 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1486 | |
3b8d81e0 | 1487 | headroom = local->tx_headroom; |
23c0752a JB |
1488 | if (may_encrypt) |
1489 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1490 | headroom -= skb_headroom(skb); | |
1491 | headroom = max_t(int, 0, headroom); | |
1492 | ||
3bff1865 | 1493 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
c3e7724b | 1494 | ieee80211_free_txskb(&local->hw, skb); |
3b8d81e0 | 1495 | return; |
e2ebc74d JB |
1496 | } |
1497 | ||
740c1aa3 | 1498 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1499 | info->control.vif = &sdata->vif; |
e2ebc74d | 1500 | |
3f52b7e3 MP |
1501 | if (ieee80211_vif_is_mesh(&sdata->vif)) { |
1502 | if (ieee80211_is_data(hdr->frame_control) && | |
1503 | is_unicast_ether_addr(hdr->addr1)) { | |
bf7cd94d | 1504 | if (mesh_nexthop_resolve(sdata, skb)) |
3f52b7e3 MP |
1505 | return; /* skb queued: don't free */ |
1506 | } else { | |
1507 | ieee80211_mps_set_frame_flags(sdata, NULL, hdr); | |
1508 | } | |
98aed9fd | 1509 | } |
cca89496 | 1510 | |
2154c81c | 1511 | ieee80211_set_qos_hdr(sdata, skb); |
55de908a | 1512 | ieee80211_tx(sdata, skb, false, band); |
e2ebc74d JB |
1513 | } |
1514 | ||
73b9f03a JB |
1515 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1516 | { | |
1517 | struct ieee80211_radiotap_iterator iterator; | |
1518 | struct ieee80211_radiotap_header *rthdr = | |
1519 | (struct ieee80211_radiotap_header *) skb->data; | |
1520 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1521 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1522 | NULL); | |
1523 | u16 txflags; | |
1524 | ||
1525 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1526 | IEEE80211_TX_CTL_DONTFRAG; | |
1527 | ||
1528 | /* | |
1529 | * for every radiotap entry that is present | |
1530 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1531 | * entries present, or -EINVAL on error) | |
1532 | */ | |
1533 | ||
1534 | while (!ret) { | |
1535 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1536 | ||
1537 | if (ret) | |
1538 | continue; | |
1539 | ||
1540 | /* see if this argument is something we can use */ | |
1541 | switch (iterator.this_arg_index) { | |
1542 | /* | |
1543 | * You must take care when dereferencing iterator.this_arg | |
1544 | * for multibyte types... the pointer is not aligned. Use | |
1545 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1546 | * iterator.this_arg for type "type" safely on all arches. | |
1547 | */ | |
1548 | case IEEE80211_RADIOTAP_FLAGS: | |
1549 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1550 | /* | |
1551 | * this indicates that the skb we have been | |
1552 | * handed has the 32-bit FCS CRC at the end... | |
1553 | * we should react to that by snipping it off | |
1554 | * because it will be recomputed and added | |
1555 | * on transmission | |
1556 | */ | |
1557 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1558 | return false; | |
1559 | ||
1560 | skb_trim(skb, skb->len - FCS_LEN); | |
1561 | } | |
1562 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1563 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1564 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1565 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1566 | break; | |
1567 | ||
1568 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1569 | txflags = get_unaligned_le16(iterator.this_arg); | |
1570 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1571 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1572 | break; | |
1573 | ||
1574 | /* | |
1575 | * Please update the file | |
1576 | * Documentation/networking/mac80211-injection.txt | |
1577 | * when parsing new fields here. | |
1578 | */ | |
1579 | ||
1580 | default: | |
1581 | break; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1586 | return false; | |
1587 | ||
1588 | /* | |
1589 | * remove the radiotap header | |
1590 | * iterator->_max_length was sanity-checked against | |
1591 | * skb->len by iterator init | |
1592 | */ | |
1593 | skb_pull(skb, iterator._max_length); | |
1594 | ||
1595 | return true; | |
1596 | } | |
1597 | ||
d0cf9c0d SH |
1598 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1599 | struct net_device *dev) | |
e2ebc74d JB |
1600 | { |
1601 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
55de908a JB |
1602 | struct ieee80211_chanctx_conf *chanctx_conf; |
1603 | struct ieee80211_channel *chan; | |
e2ebc74d JB |
1604 | struct ieee80211_radiotap_header *prthdr = |
1605 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1606 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1607 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1608 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
9b8a74e3 | 1609 | u16 len_rthdr; |
5d9cf4a5 | 1610 | int hdrlen; |
e2ebc74d | 1611 | |
9b8a74e3 AG |
1612 | /* check for not even having the fixed radiotap header part */ |
1613 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1614 | goto fail; /* too short to be possibly valid */ | |
1615 | ||
1616 | /* is it a header version we can trust to find length from? */ | |
1617 | if (unlikely(prthdr->it_version)) | |
1618 | goto fail; /* only version 0 is supported */ | |
1619 | ||
1620 | /* then there must be a radiotap header with a length we can use */ | |
1621 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1622 | ||
1623 | /* does the skb contain enough to deliver on the alleged length? */ | |
1624 | if (unlikely(skb->len < len_rthdr)) | |
1625 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1626 | |
e2ebc74d JB |
1627 | /* |
1628 | * fix up the pointers accounting for the radiotap | |
1629 | * header still being in there. We are being given | |
1630 | * a precooked IEEE80211 header so no need for | |
1631 | * normal processing | |
1632 | */ | |
9b8a74e3 | 1633 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1634 | /* |
9b8a74e3 AG |
1635 | * these are just fixed to the end of the rt area since we |
1636 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1637 | */ |
9b8a74e3 AG |
1638 | skb_set_network_header(skb, len_rthdr); |
1639 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1640 | |
5d9cf4a5 JB |
1641 | if (skb->len < len_rthdr + 2) |
1642 | goto fail; | |
1643 | ||
1644 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1645 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1646 | ||
1647 | if (skb->len < len_rthdr + hdrlen) | |
1648 | goto fail; | |
1649 | ||
f75f5c6f HS |
1650 | /* |
1651 | * Initialize skb->protocol if the injected frame is a data frame | |
1652 | * carrying a rfc1042 header | |
1653 | */ | |
5d9cf4a5 JB |
1654 | if (ieee80211_is_data(hdr->frame_control) && |
1655 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1656 | u8 *payload = (u8 *)hdr + hdrlen; | |
1657 | ||
b203ca39 | 1658 | if (ether_addr_equal(payload, rfc1042_header)) |
5d9cf4a5 JB |
1659 | skb->protocol = cpu_to_be16((payload[6] << 8) | |
1660 | payload[7]); | |
f75f5c6f HS |
1661 | } |
1662 | ||
3b8d81e0 JB |
1663 | memset(info, 0, sizeof(*info)); |
1664 | ||
5d9cf4a5 | 1665 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1666 | IEEE80211_TX_CTL_INJECTED; |
1667 | ||
1668 | /* process and remove the injection radiotap header */ | |
1669 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1670 | goto fail; | |
5d9cf4a5 JB |
1671 | |
1672 | rcu_read_lock(); | |
1673 | ||
1674 | /* | |
1675 | * We process outgoing injected frames that have a local address | |
1676 | * we handle as though they are non-injected frames. | |
1677 | * This code here isn't entirely correct, the local MAC address | |
1678 | * isn't always enough to find the interface to use; for proper | |
1679 | * VLAN/WDS support we will need a different mechanism (which | |
1680 | * likely isn't going to be monitor interfaces). | |
1681 | */ | |
1682 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1683 | ||
1684 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1685 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1686 | continue; | |
1687 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1688 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1689 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1690 | continue; | |
b203ca39 | 1691 | if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) { |
5d9cf4a5 JB |
1692 | sdata = tmp_sdata; |
1693 | break; | |
1694 | } | |
1695 | } | |
7351c6bd | 1696 | |
55de908a JB |
1697 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1698 | if (!chanctx_conf) { | |
1699 | tmp_sdata = rcu_dereference(local->monitor_sdata); | |
1700 | if (tmp_sdata) | |
1701 | chanctx_conf = | |
1702 | rcu_dereference(tmp_sdata->vif.chanctx_conf); | |
1703 | } | |
55de908a | 1704 | |
b4a7ff75 FF |
1705 | if (chanctx_conf) |
1706 | chan = chanctx_conf->def.chan; | |
1707 | else if (!local->use_chanctx) | |
1708 | chan = local->_oper_channel; | |
1709 | else | |
1710 | goto fail_rcu; | |
55de908a JB |
1711 | |
1712 | /* | |
1713 | * Frame injection is not allowed if beaconing is not allowed | |
1714 | * or if we need radar detection. Beaconing is usually not allowed when | |
1715 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1716 | * Passive scan is also used in world regulatory domains where | |
1717 | * your country is not known and as such it should be treated as | |
1718 | * NO TX unless the channel is explicitly allowed in which case | |
1719 | * your current regulatory domain would not have the passive scan | |
1720 | * flag. | |
1721 | * | |
1722 | * Since AP mode uses monitor interfaces to inject/TX management | |
1723 | * frames we can make AP mode the exception to this rule once it | |
1724 | * supports radar detection as its implementation can deal with | |
1725 | * radar detection by itself. We can do that later by adding a | |
1726 | * monitor flag interfaces used for AP support. | |
1727 | */ | |
1728 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1729 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1730 | goto fail_rcu; | |
1731 | ||
1732 | ieee80211_xmit(sdata, skb, chan->band); | |
5d9cf4a5 JB |
1733 | rcu_read_unlock(); |
1734 | ||
e2ebc74d | 1735 | return NETDEV_TX_OK; |
9b8a74e3 | 1736 | |
55de908a JB |
1737 | fail_rcu: |
1738 | rcu_read_unlock(); | |
9b8a74e3 AG |
1739 | fail: |
1740 | dev_kfree_skb(skb); | |
1741 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1742 | } |
1743 | ||
1744 | /** | |
1745 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1746 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1747 | * @skb: packet to be sent | |
1748 | * @dev: incoming interface | |
1749 | * | |
1750 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1751 | * not be freed, and caller is responsible for either retrying later or freeing | |
1752 | * skb). | |
1753 | * | |
1754 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1755 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1756 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1757 | * transmission (through low-level driver). | |
1758 | */ | |
d0cf9c0d SH |
1759 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1760 | struct net_device *dev) | |
e2ebc74d | 1761 | { |
133b8226 JB |
1762 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1763 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1764 | struct ieee80211_tx_info *info; |
dcf33963 | 1765 | int head_need; |
065e9605 HH |
1766 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1767 | __le16 fc; | |
e2ebc74d | 1768 | struct ieee80211_hdr hdr; |
ff67bb86 | 1769 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
b8bacc18 | 1770 | struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL; |
e2ebc74d JB |
1771 | const u8 *encaps_data; |
1772 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1773 | int nh_pos, h_pos; |
f14543ee | 1774 | struct sta_info *sta = NULL; |
c2c98fde | 1775 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1776 | bool tdls_direct = false; |
a729cff8 JB |
1777 | bool multicast; |
1778 | u32 info_flags = 0; | |
1779 | u16 info_id = 0; | |
55de908a JB |
1780 | struct ieee80211_chanctx_conf *chanctx_conf; |
1781 | struct ieee80211_sub_if_data *ap_sdata; | |
1782 | enum ieee80211_band band; | |
e2ebc74d | 1783 | |
dcf33963 | 1784 | if (unlikely(skb->len < ETH_HLEN)) |
e2ebc74d | 1785 | goto fail; |
e2ebc74d | 1786 | |
e2ebc74d JB |
1787 | /* convert Ethernet header to proper 802.11 header (based on |
1788 | * operation mode) */ | |
1789 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1790 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1791 | |
55de908a JB |
1792 | rcu_read_lock(); |
1793 | ||
51fb61e7 | 1794 | switch (sdata->vif.type) { |
05c914fe | 1795 | case NL80211_IFTYPE_AP_VLAN: |
9bc383de | 1796 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1797 | if (sta) { |
1798 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1799 | /* RA TA DA SA */ | |
1800 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1801 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1802 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1803 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1804 | hdrlen = 30; | |
c2c98fde JB |
1805 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1806 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee | 1807 | } |
55de908a JB |
1808 | ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, |
1809 | u.ap); | |
1810 | chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf); | |
1811 | if (!chanctx_conf) | |
1812 | goto fail_rcu; | |
4bf88530 | 1813 | band = chanctx_conf->def.chan->band; |
f14543ee FF |
1814 | if (sta) |
1815 | break; | |
1816 | /* fall through */ | |
1817 | case NL80211_IFTYPE_AP: | |
fe80123d AB |
1818 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1819 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); | |
1820 | if (!chanctx_conf) | |
1821 | goto fail_rcu; | |
065e9605 | 1822 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1823 | /* DA BSSID SA */ |
1824 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1825 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1826 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1827 | hdrlen = 24; | |
4bf88530 | 1828 | band = chanctx_conf->def.chan->band; |
cf966838 | 1829 | break; |
05c914fe | 1830 | case NL80211_IFTYPE_WDS: |
065e9605 | 1831 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1832 | /* RA TA DA SA */ |
1833 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1834 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1835 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1836 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1837 | hdrlen = 30; | |
55de908a JB |
1838 | /* |
1839 | * This is the exception! WDS style interfaces are prohibited | |
1840 | * when channel contexts are in used so this must be valid | |
1841 | */ | |
1842 | band = local->hw.conf.channel->band; | |
cf966838 | 1843 | break; |
33b64eb2 | 1844 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1845 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1846 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1847 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1848 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
55de908a | 1849 | goto fail_rcu; |
33b64eb2 | 1850 | } |
55de908a | 1851 | |
b8bacc18 | 1852 | if (!is_multicast_ether_addr(skb->data)) { |
163df6cf CYY |
1853 | struct sta_info *next_hop; |
1854 | bool mpp_lookup = true; | |
1855 | ||
bf7cd94d | 1856 | mpath = mesh_path_lookup(sdata, skb->data); |
163df6cf CYY |
1857 | if (mpath) { |
1858 | mpp_lookup = false; | |
1859 | next_hop = rcu_dereference(mpath->next_hop); | |
1860 | if (!next_hop || | |
1861 | !(mpath->flags & (MESH_PATH_ACTIVE | | |
1862 | MESH_PATH_RESOLVING))) | |
1863 | mpp_lookup = true; | |
1864 | } | |
1865 | ||
1866 | if (mpp_lookup) | |
bf7cd94d | 1867 | mppath = mpp_path_lookup(sdata, skb->data); |
163df6cf CYY |
1868 | |
1869 | if (mppath && mpath) | |
1870 | mesh_path_del(mpath->sdata, mpath->dst); | |
b8bacc18 | 1871 | } |
79617dee | 1872 | |
f76b57b4 | 1873 | /* |
9d52501b JF |
1874 | * Use address extension if it is a packet from |
1875 | * another interface or if we know the destination | |
1876 | * is being proxied by a portal (i.e. portal address | |
1877 | * differs from proxied address) | |
f76b57b4 | 1878 | */ |
b203ca39 JP |
1879 | if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) && |
1880 | !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) { | |
3c5772a5 JC |
1881 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1882 | skb->data, skb->data + ETH_ALEN); | |
bf7cd94d JB |
1883 | meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr, |
1884 | NULL, NULL); | |
79617dee | 1885 | } else { |
27f01124 TP |
1886 | /* DS -> MBSS (802.11-2012 13.11.3.3). |
1887 | * For unicast with unknown forwarding information, | |
1888 | * destination might be in the MBSS or if that fails | |
1889 | * forwarded to another mesh gate. In either case | |
1890 | * resolution will be handled in ieee80211_xmit(), so | |
1891 | * leave the original DA. This also works for mcast */ | |
1892 | const u8 *mesh_da = skb->data; | |
1893 | ||
1894 | if (mppath) | |
1895 | mesh_da = mppath->mpp; | |
1896 | else if (mpath) | |
1897 | mesh_da = mpath->dst; | |
79617dee | 1898 | |
3c5772a5 | 1899 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1900 | mesh_da, sdata->vif.addr); |
27f01124 TP |
1901 | if (is_multicast_ether_addr(mesh_da)) |
1902 | /* DA TA mSA AE:SA */ | |
bf7cd94d JB |
1903 | meshhdrlen = ieee80211_new_mesh_header( |
1904 | sdata, &mesh_hdr, | |
1905 | skb->data + ETH_ALEN, NULL); | |
3c5772a5 | 1906 | else |
27f01124 | 1907 | /* RA TA mDA mSA AE:DA SA */ |
bf7cd94d JB |
1908 | meshhdrlen = ieee80211_new_mesh_header( |
1909 | sdata, &mesh_hdr, skb->data, | |
1910 | skb->data + ETH_ALEN); | |
79617dee | 1911 | |
79617dee | 1912 | } |
55de908a JB |
1913 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1914 | if (!chanctx_conf) | |
1915 | goto fail_rcu; | |
4bf88530 | 1916 | band = chanctx_conf->def.chan->band; |
33b64eb2 LCC |
1917 | break; |
1918 | #endif | |
05c914fe | 1919 | case NL80211_IFTYPE_STATION: |
941c93cd | 1920 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1921 | bool tdls_peer = false; |
1922 | ||
941c93cd | 1923 | sta = sta_info_get(sdata, skb->data); |
c2c98fde JB |
1924 | if (sta) { |
1925 | authorized = test_sta_flag(sta, | |
1926 | WLAN_STA_AUTHORIZED); | |
1927 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1928 | tdls_peer = test_sta_flag(sta, | |
1929 | WLAN_STA_TDLS_PEER); | |
1930 | tdls_auth = test_sta_flag(sta, | |
1931 | WLAN_STA_TDLS_PEER_AUTH); | |
1932 | } | |
941c93cd AN |
1933 | |
1934 | /* | |
1935 | * If the TDLS link is enabled, send everything | |
1936 | * directly. Otherwise, allow TDLS setup frames | |
1937 | * to be transmitted indirectly. | |
1938 | */ | |
c2c98fde | 1939 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1940 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1941 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1942 | } | |
1943 | ||
1944 | if (tdls_direct) { | |
1945 | /* link during setup - throw out frames to peer */ | |
dcf33963 | 1946 | if (!tdls_auth) |
55de908a | 1947 | goto fail_rcu; |
941c93cd AN |
1948 | |
1949 | /* DA SA BSSID */ | |
1950 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1951 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1952 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1953 | hdrlen = 24; | |
1954 | } else if (sdata->u.mgd.use_4addr && | |
1955 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1956 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1957 | IEEE80211_FCTL_TODS); | |
f14543ee | 1958 | /* RA TA DA SA */ |
941c93cd | 1959 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1960 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1961 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1962 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1963 | hdrlen = 30; | |
1964 | } else { | |
1965 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1966 | /* BSSID SA DA */ | |
941c93cd | 1967 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
1968 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
1969 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1970 | hdrlen = 24; | |
1971 | } | |
55de908a JB |
1972 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1973 | if (!chanctx_conf) | |
1974 | goto fail_rcu; | |
4bf88530 | 1975 | band = chanctx_conf->def.chan->band; |
cf966838 | 1976 | break; |
05c914fe | 1977 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1978 | /* DA SA BSSID */ |
1979 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1980 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1981 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1982 | hdrlen = 24; |
55de908a JB |
1983 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
1984 | if (!chanctx_conf) | |
1985 | goto fail_rcu; | |
4bf88530 | 1986 | band = chanctx_conf->def.chan->band; |
cf966838 JB |
1987 | break; |
1988 | default: | |
55de908a | 1989 | goto fail_rcu; |
e2ebc74d JB |
1990 | } |
1991 | ||
7d185b8b JB |
1992 | /* |
1993 | * There's no need to try to look up the destination | |
1994 | * if it is a multicast address (which can only happen | |
1995 | * in AP mode) | |
1996 | */ | |
a729cff8 JB |
1997 | multicast = is_multicast_ether_addr(hdr.addr1); |
1998 | if (!multicast) { | |
abe60632 | 1999 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
2000 | if (sta) { |
2001 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
2002 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
2003 | } | |
e2ebc74d JB |
2004 | } |
2005 | ||
4777be41 JC |
2006 | /* For mesh, the use of the QoS header is mandatory */ |
2007 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 2008 | wme_sta = true; |
4777be41 | 2009 | |
3434fbd3 | 2010 | /* receiver and we are QoS enabled, use a QoS type frame */ |
32c5057b | 2011 | if (wme_sta && local->hw.queues >= IEEE80211_NUM_ACS) { |
065e9605 | 2012 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
2013 | hdrlen += 2; |
2014 | } | |
2015 | ||
2016 | /* | |
238814fd JB |
2017 | * Drop unicast frames to unauthorised stations unless they are |
2018 | * EAPOL frames from the local station. | |
ce3edf6d | 2019 | */ |
55182e4a JB |
2020 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
2021 | !is_multicast_ether_addr(hdr.addr1) && !authorized && | |
2022 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || | |
b203ca39 | 2023 | !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { |
ce3edf6d | 2024 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
bdcbd8e0 | 2025 | net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n", |
e87cc472 | 2026 | dev->name, hdr.addr1); |
ce3edf6d JB |
2027 | #endif |
2028 | ||
2029 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
2030 | ||
55de908a | 2031 | goto fail_rcu; |
ce3edf6d JB |
2032 | } |
2033 | ||
a729cff8 JB |
2034 | if (unlikely(!multicast && skb->sk && |
2035 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
2036 | struct sk_buff *orig_skb = skb; | |
2037 | ||
2038 | skb = skb_clone(skb, GFP_ATOMIC); | |
2039 | if (skb) { | |
2040 | unsigned long flags; | |
9475af6e | 2041 | int id; |
a729cff8 JB |
2042 | |
2043 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
9475af6e TH |
2044 | id = idr_alloc(&local->ack_status_frames, orig_skb, |
2045 | 1, 0x10000, GFP_ATOMIC); | |
a729cff8 JB |
2046 | spin_unlock_irqrestore(&local->ack_status_lock, flags); |
2047 | ||
9475af6e | 2048 | if (id >= 0) { |
a729cff8 JB |
2049 | info_id = id; |
2050 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
2051 | } else if (skb_shared(skb)) { | |
2052 | kfree_skb(orig_skb); | |
2053 | } else { | |
2054 | kfree_skb(skb); | |
2055 | skb = orig_skb; | |
2056 | } | |
2057 | } else { | |
2058 | /* couldn't clone -- lose tx status ... */ | |
2059 | skb = orig_skb; | |
2060 | } | |
2061 | } | |
2062 | ||
7e244707 HS |
2063 | /* |
2064 | * If the skb is shared we need to obtain our own copy. | |
2065 | */ | |
2066 | if (skb_shared(skb)) { | |
a729cff8 JB |
2067 | struct sk_buff *tmp_skb = skb; |
2068 | ||
2069 | /* can't happen -- skb is a clone if info_id != 0 */ | |
2070 | WARN_ON(info_id); | |
2071 | ||
f8a0a781 | 2072 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2073 | kfree_skb(tmp_skb); |
2074 | ||
dcf33963 | 2075 | if (!skb) |
55de908a | 2076 | goto fail_rcu; |
7e244707 HS |
2077 | } |
2078 | ||
065e9605 | 2079 | hdr.frame_control = fc; |
e2ebc74d JB |
2080 | hdr.duration_id = 0; |
2081 | hdr.seq_ctrl = 0; | |
2082 | ||
2083 | skip_header_bytes = ETH_HLEN; | |
2084 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2085 | encaps_data = bridge_tunnel_header; | |
2086 | encaps_len = sizeof(bridge_tunnel_header); | |
2087 | skip_header_bytes -= 2; | |
2088 | } else if (ethertype >= 0x600) { | |
2089 | encaps_data = rfc1042_header; | |
2090 | encaps_len = sizeof(rfc1042_header); | |
2091 | skip_header_bytes -= 2; | |
2092 | } else { | |
2093 | encaps_data = NULL; | |
2094 | encaps_len = 0; | |
2095 | } | |
2096 | ||
7e244707 HS |
2097 | nh_pos = skb_network_header(skb) - skb->data; |
2098 | h_pos = skb_transport_header(skb) - skb->data; | |
2099 | ||
e2ebc74d JB |
2100 | skb_pull(skb, skip_header_bytes); |
2101 | nh_pos -= skip_header_bytes; | |
2102 | h_pos -= skip_header_bytes; | |
2103 | ||
23c0752a | 2104 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2105 | |
23c0752a JB |
2106 | /* |
2107 | * So we need to modify the skb header and hence need a copy of | |
2108 | * that. The head_need variable above doesn't, so far, include | |
2109 | * the needed header space that we don't need right away. If we | |
2110 | * can, then we don't reallocate right now but only after the | |
2111 | * frame arrives at the master device (if it does...) | |
2112 | * | |
2113 | * If we cannot, however, then we will reallocate to include all | |
2114 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2115 | * make it big enough for everything we may ever need. | |
2116 | */ | |
e2ebc74d | 2117 | |
3a5be7d4 | 2118 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
2119 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
2120 | head_need += local->tx_headroom; | |
2121 | head_need = max_t(int, 0, head_need); | |
c3e7724b FF |
2122 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) { |
2123 | ieee80211_free_txskb(&local->hw, skb); | |
1c963bec | 2124 | skb = NULL; |
55de908a | 2125 | goto fail_rcu; |
c3e7724b | 2126 | } |
e2ebc74d JB |
2127 | } |
2128 | ||
2129 | if (encaps_data) { | |
2130 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2131 | nh_pos += encaps_len; | |
2132 | h_pos += encaps_len; | |
2133 | } | |
c29b9b9b | 2134 | |
e4ab7eb0 | 2135 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2136 | if (meshhdrlen > 0) { |
2137 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2138 | nh_pos += meshhdrlen; | |
2139 | h_pos += meshhdrlen; | |
2140 | } | |
e4ab7eb0 | 2141 | #endif |
33b64eb2 | 2142 | |
065e9605 | 2143 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2144 | __le16 *qos_control; |
2145 | ||
2146 | qos_control = (__le16*) skb_push(skb, 2); | |
2147 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
2148 | /* | |
2149 | * Maybe we could actually set some fields here, for now just | |
2150 | * initialise to zero to indicate no special operation. | |
2151 | */ | |
2152 | *qos_control = 0; | |
2153 | } else | |
2154 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2155 | ||
e2ebc74d JB |
2156 | nh_pos += hdrlen; |
2157 | h_pos += hdrlen; | |
2158 | ||
68aae116 SH |
2159 | dev->stats.tx_packets++; |
2160 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2161 | |
2162 | /* Update skb pointers to various headers since this modified frame | |
2163 | * is going to go through Linux networking code that may potentially | |
2164 | * need things like pointer to IP header. */ | |
2165 | skb_set_mac_header(skb, 0); | |
2166 | skb_set_network_header(skb, nh_pos); | |
2167 | skb_set_transport_header(skb, h_pos); | |
2168 | ||
489ee919 | 2169 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2170 | memset(info, 0, sizeof(*info)); |
2171 | ||
e2ebc74d | 2172 | dev->trans_start = jiffies; |
a729cff8 JB |
2173 | |
2174 | info->flags = info_flags; | |
2175 | info->ack_frame_id = info_id; | |
2176 | ||
55de908a JB |
2177 | ieee80211_xmit(sdata, skb, band); |
2178 | rcu_read_unlock(); | |
e2ebc74d | 2179 | |
ec634fe3 | 2180 | return NETDEV_TX_OK; |
e2ebc74d | 2181 | |
55de908a JB |
2182 | fail_rcu: |
2183 | rcu_read_unlock(); | |
e2ebc74d | 2184 | fail: |
dcf33963 JB |
2185 | dev_kfree_skb(skb); |
2186 | return NETDEV_TX_OK; | |
e2ebc74d JB |
2187 | } |
2188 | ||
e2ebc74d | 2189 | |
e2530083 JB |
2190 | /* |
2191 | * ieee80211_clear_tx_pending may not be called in a context where | |
2192 | * it is possible that it packets could come in again. | |
2193 | */ | |
e2ebc74d JB |
2194 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2195 | { | |
1f98ab7f | 2196 | struct sk_buff *skb; |
2de8e0d9 | 2197 | int i; |
e2ebc74d | 2198 | |
1f98ab7f FF |
2199 | for (i = 0; i < local->hw.queues; i++) { |
2200 | while ((skb = skb_dequeue(&local->pending[i])) != NULL) | |
2201 | ieee80211_free_txskb(&local->hw, skb); | |
2202 | } | |
e2ebc74d JB |
2203 | } |
2204 | ||
7bb45683 JB |
2205 | /* |
2206 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2207 | * which in this case means re-queued -- take as an indication to stop sending | |
2208 | * more pending frames. | |
2209 | */ | |
cd8ffc80 JB |
2210 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2211 | struct sk_buff *skb) | |
2212 | { | |
2213 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2214 | struct ieee80211_sub_if_data *sdata; | |
2215 | struct sta_info *sta; | |
2216 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2217 | bool result; |
55de908a | 2218 | struct ieee80211_chanctx_conf *chanctx_conf; |
cd8ffc80 | 2219 | |
5061b0c2 | 2220 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2221 | |
2222 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
55de908a JB |
2223 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
2224 | if (unlikely(!chanctx_conf)) { | |
2225 | dev_kfree_skb(skb); | |
2226 | return true; | |
2227 | } | |
2228 | result = ieee80211_tx(sdata, skb, true, | |
4bf88530 | 2229 | chanctx_conf->def.chan->band); |
cd8ffc80 | 2230 | } else { |
252b86c4 JB |
2231 | struct sk_buff_head skbs; |
2232 | ||
2233 | __skb_queue_head_init(&skbs); | |
2234 | __skb_queue_tail(&skbs, skb); | |
2235 | ||
cd8ffc80 | 2236 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2237 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2238 | |
74e4dbfd | 2239 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2240 | } |
2241 | ||
cd8ffc80 JB |
2242 | return result; |
2243 | } | |
2244 | ||
e2530083 | 2245 | /* |
3b8d81e0 | 2246 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2247 | */ |
e2ebc74d JB |
2248 | void ieee80211_tx_pending(unsigned long data) |
2249 | { | |
2250 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 2251 | unsigned long flags; |
cd8ffc80 | 2252 | int i; |
3b8d81e0 | 2253 | bool txok; |
e2ebc74d | 2254 | |
f0e72851 | 2255 | rcu_read_lock(); |
e2530083 | 2256 | |
3b8d81e0 | 2257 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2258 | for (i = 0; i < local->hw.queues; i++) { |
2259 | /* | |
2260 | * If queue is stopped by something other than due to pending | |
2261 | * frames, or we have no pending frames, proceed to next queue. | |
2262 | */ | |
3b8d81e0 | 2263 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2264 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2265 | continue; |
e2530083 | 2266 | |
2a577d98 | 2267 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2268 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2269 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2270 | |
a7bc376c | 2271 | if (WARN_ON(!info->control.vif)) { |
c3e7724b | 2272 | ieee80211_free_txskb(&local->hw, skb); |
a7bc376c JB |
2273 | continue; |
2274 | } | |
2275 | ||
3b8d81e0 JB |
2276 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2277 | flags); | |
2278 | ||
2279 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2280 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2281 | flags); | |
2282 | if (!txok) | |
2a577d98 | 2283 | break; |
e2ebc74d | 2284 | } |
7236fe29 JB |
2285 | |
2286 | if (skb_queue_empty(&local->pending[i])) | |
3a25a8c8 | 2287 | ieee80211_propagate_queue_wake(local, i); |
e2ebc74d | 2288 | } |
3b8d81e0 | 2289 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2290 | |
f0e72851 | 2291 | rcu_read_unlock(); |
e2ebc74d JB |
2292 | } |
2293 | ||
2294 | /* functions for drivers to get certain frames */ | |
2295 | ||
eac70c13 MP |
2296 | static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2297 | struct ps_data *ps, struct sk_buff *skb) | |
e2ebc74d JB |
2298 | { |
2299 | u8 *pos, *tim; | |
2300 | int aid0 = 0; | |
2301 | int i, have_bits = 0, n1, n2; | |
2302 | ||
2303 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2304 | * mode. */ | |
d012a605 | 2305 | if (atomic_read(&ps->num_sta_ps) > 0) |
e2ebc74d JB |
2306 | /* in the hope that this is faster than |
2307 | * checking byte-for-byte */ | |
d012a605 | 2308 | have_bits = !bitmap_empty((unsigned long*)ps->tim, |
e2ebc74d JB |
2309 | IEEE80211_MAX_AID+1); |
2310 | ||
d012a605 MP |
2311 | if (ps->dtim_count == 0) |
2312 | ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; | |
e2ebc74d | 2313 | else |
d012a605 | 2314 | ps->dtim_count--; |
e2ebc74d JB |
2315 | |
2316 | tim = pos = (u8 *) skb_put(skb, 6); | |
2317 | *pos++ = WLAN_EID_TIM; | |
2318 | *pos++ = 4; | |
d012a605 | 2319 | *pos++ = ps->dtim_count; |
8860020e | 2320 | *pos++ = sdata->vif.bss_conf.dtim_period; |
e2ebc74d | 2321 | |
d012a605 | 2322 | if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf)) |
e2ebc74d JB |
2323 | aid0 = 1; |
2324 | ||
d012a605 | 2325 | ps->dtim_bc_mc = aid0 == 1; |
512119b3 | 2326 | |
e2ebc74d JB |
2327 | if (have_bits) { |
2328 | /* Find largest even number N1 so that bits numbered 1 through | |
2329 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2330 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2331 | n1 = 0; | |
2332 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
d012a605 | 2333 | if (ps->tim[i]) { |
e2ebc74d JB |
2334 | n1 = i & 0xfe; |
2335 | break; | |
2336 | } | |
2337 | } | |
2338 | n2 = n1; | |
2339 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
d012a605 | 2340 | if (ps->tim[i]) { |
e2ebc74d JB |
2341 | n2 = i; |
2342 | break; | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | /* Bitmap control */ | |
2347 | *pos++ = n1 | aid0; | |
2348 | /* Part Virt Bitmap */ | |
5220da39 | 2349 | skb_put(skb, n2 - n1); |
d012a605 | 2350 | memcpy(pos, ps->tim + n1, n2 - n1 + 1); |
e2ebc74d JB |
2351 | |
2352 | tim[1] = n2 - n1 + 4; | |
e2ebc74d JB |
2353 | } else { |
2354 | *pos++ = aid0; /* Bitmap control */ | |
2355 | *pos++ = 0; /* Part Virt Bitmap */ | |
2356 | } | |
e2ebc74d JB |
2357 | } |
2358 | ||
eac70c13 MP |
2359 | static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, |
2360 | struct ps_data *ps, struct sk_buff *skb) | |
2361 | { | |
2362 | struct ieee80211_local *local = sdata->local; | |
2363 | ||
2364 | /* | |
2365 | * Not very nice, but we want to allow the driver to call | |
2366 | * ieee80211_beacon_get() as a response to the set_tim() | |
2367 | * callback. That, however, is already invoked under the | |
2368 | * sta_lock to guarantee consistent and race-free update | |
2369 | * of the tim bitmap in mac80211 and the driver. | |
2370 | */ | |
2371 | if (local->tim_in_locked_section) { | |
2372 | __ieee80211_beacon_add_tim(sdata, ps, skb); | |
2373 | } else { | |
1b91731d | 2374 | spin_lock_bh(&local->tim_lock); |
eac70c13 | 2375 | __ieee80211_beacon_add_tim(sdata, ps, skb); |
1b91731d | 2376 | spin_unlock_bh(&local->tim_lock); |
eac70c13 MP |
2377 | } |
2378 | ||
2379 | return 0; | |
2380 | } | |
2381 | ||
eddcbb94 JB |
2382 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2383 | struct ieee80211_vif *vif, | |
2384 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2385 | { |
2386 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2387 | struct sk_buff *skb = NULL; |
e039fa4a | 2388 | struct ieee80211_tx_info *info; |
e2ebc74d | 2389 | struct ieee80211_sub_if_data *sdata = NULL; |
55de908a | 2390 | enum ieee80211_band band; |
e00cfce0 | 2391 | struct ieee80211_tx_rate_control txrc; |
55de908a | 2392 | struct ieee80211_chanctx_conf *chanctx_conf; |
8318d78a | 2393 | |
5dfdaf58 | 2394 | rcu_read_lock(); |
e2ebc74d | 2395 | |
32bfd35d | 2396 | sdata = vif_to_sdata(vif); |
55de908a | 2397 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
e2ebc74d | 2398 | |
55de908a | 2399 | if (!ieee80211_sdata_running(sdata) || !chanctx_conf) |
eb3e554b FF |
2400 | goto out; |
2401 | ||
eddcbb94 JB |
2402 | if (tim_offset) |
2403 | *tim_offset = 0; | |
2404 | if (tim_length) | |
2405 | *tim_length = 0; | |
2406 | ||
05c914fe | 2407 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
d012a605 MP |
2408 | struct ieee80211_if_ap *ap = &sdata->u.ap; |
2409 | struct beacon_data *beacon = rcu_dereference(ap->beacon); | |
2410 | ||
3ad97fbc | 2411 | if (beacon) { |
902acc78 JB |
2412 | /* |
2413 | * headroom, head length, | |
2414 | * tail length and maximum TIM length | |
2415 | */ | |
2416 | skb = dev_alloc_skb(local->tx_headroom + | |
2417 | beacon->head_len + | |
2418 | beacon->tail_len + 256); | |
2419 | if (!skb) | |
2420 | goto out; | |
33b64eb2 | 2421 | |
902acc78 JB |
2422 | skb_reserve(skb, local->tx_headroom); |
2423 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2424 | beacon->head_len); | |
33b64eb2 | 2425 | |
eac70c13 | 2426 | ieee80211_beacon_add_tim(sdata, &ap->ps, skb); |
33b64eb2 | 2427 | |
eddcbb94 JB |
2428 | if (tim_offset) |
2429 | *tim_offset = beacon->head_len; | |
2430 | if (tim_length) | |
2431 | *tim_length = skb->len - beacon->head_len; | |
2432 | ||
902acc78 JB |
2433 | if (beacon->tail) |
2434 | memcpy(skb_put(skb, beacon->tail_len), | |
2435 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2436 | } else |
2437 | goto out; | |
05c914fe | 2438 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2439 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2440 | struct ieee80211_hdr *hdr; |
af8cdcd8 | 2441 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2442 | |
af8cdcd8 | 2443 | if (!presp) |
9d139c81 JB |
2444 | goto out; |
2445 | ||
af8cdcd8 | 2446 | skb = skb_copy(presp, GFP_ATOMIC); |
9d139c81 JB |
2447 | if (!skb) |
2448 | goto out; | |
2449 | ||
2450 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2451 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2452 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2453 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
dbf498fb | 2454 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
2b5e1967 | 2455 | struct beacon_data *bcn = rcu_dereference(ifmsh->beacon); |
472dbc45 | 2456 | |
2b5e1967 | 2457 | if (!bcn) |
ac1bd846 | 2458 | goto out; |
ac1bd846 | 2459 | |
dbf498fb JC |
2460 | if (ifmsh->sync_ops) |
2461 | ifmsh->sync_ops->adjust_tbtt( | |
2462 | sdata); | |
2463 | ||
3b69a9c5 | 2464 | skb = dev_alloc_skb(local->tx_headroom + |
2b5e1967 | 2465 | bcn->head_len + |
3f52b7e3 | 2466 | 256 + /* TIM IE */ |
2b5e1967 | 2467 | bcn->tail_len); |
902acc78 JB |
2468 | if (!skb) |
2469 | goto out; | |
2b5e1967 TP |
2470 | skb_reserve(skb, local->tx_headroom); |
2471 | memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len); | |
2472 | ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb); | |
2473 | memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len); | |
9d139c81 JB |
2474 | } else { |
2475 | WARN_ON(1); | |
5dfdaf58 | 2476 | goto out; |
e2ebc74d JB |
2477 | } |
2478 | ||
4bf88530 | 2479 | band = chanctx_conf->def.chan->band; |
55de908a | 2480 | |
e039fa4a JB |
2481 | info = IEEE80211_SKB_CB(skb); |
2482 | ||
3b8d81e0 | 2483 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2484 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2485 | info->band = band; |
e00cfce0 JM |
2486 | |
2487 | memset(&txrc, 0, sizeof(txrc)); | |
2488 | txrc.hw = hw; | |
e31583cd | 2489 | txrc.sband = local->hw.wiphy->bands[band]; |
e00cfce0 JM |
2490 | txrc.bss_conf = &sdata->vif.bss_conf; |
2491 | txrc.skb = skb; | |
2492 | txrc.reported_rate.idx = -1; | |
37eb0b16 | 2493 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
e31583cd | 2494 | if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) |
37eb0b16 JM |
2495 | txrc.max_rate_idx = -1; |
2496 | else | |
2497 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
19468413 SW |
2498 | memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band], |
2499 | sizeof(txrc.rate_idx_mcs_mask)); | |
8f0729b1 | 2500 | txrc.bss = true; |
e00cfce0 | 2501 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2502 | |
2503 | info->control.vif = vif; | |
f591fa5d | 2504 | |
a472e71b JL |
2505 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2506 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2507 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2508 | out: |
5dfdaf58 | 2509 | rcu_read_unlock(); |
e2ebc74d JB |
2510 | return skb; |
2511 | } | |
eddcbb94 | 2512 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2513 | |
02945821 AN |
2514 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2515 | struct ieee80211_vif *vif) | |
2516 | { | |
2517 | struct ieee80211_if_ap *ap = NULL; | |
aa7a0080 ES |
2518 | struct sk_buff *skb = NULL; |
2519 | struct probe_resp *presp = NULL; | |
02945821 AN |
2520 | struct ieee80211_hdr *hdr; |
2521 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2522 | ||
2523 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2524 | return NULL; | |
2525 | ||
2526 | rcu_read_lock(); | |
2527 | ||
2528 | ap = &sdata->u.ap; | |
2529 | presp = rcu_dereference(ap->probe_resp); | |
2530 | if (!presp) | |
2531 | goto out; | |
2532 | ||
aa7a0080 | 2533 | skb = dev_alloc_skb(presp->len); |
02945821 AN |
2534 | if (!skb) |
2535 | goto out; | |
2536 | ||
aa7a0080 ES |
2537 | memcpy(skb_put(skb, presp->len), presp->data, presp->len); |
2538 | ||
02945821 AN |
2539 | hdr = (struct ieee80211_hdr *) skb->data; |
2540 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2541 | ||
2542 | out: | |
2543 | rcu_read_unlock(); | |
2544 | return skb; | |
2545 | } | |
2546 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2547 | ||
7044cc56 KV |
2548 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2549 | struct ieee80211_vif *vif) | |
2550 | { | |
2551 | struct ieee80211_sub_if_data *sdata; | |
2552 | struct ieee80211_if_managed *ifmgd; | |
2553 | struct ieee80211_pspoll *pspoll; | |
2554 | struct ieee80211_local *local; | |
2555 | struct sk_buff *skb; | |
2556 | ||
2557 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2558 | return NULL; | |
2559 | ||
2560 | sdata = vif_to_sdata(vif); | |
2561 | ifmgd = &sdata->u.mgd; | |
2562 | local = sdata->local; | |
2563 | ||
2564 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2565 | if (!skb) |
7044cc56 | 2566 | return NULL; |
d15b8459 | 2567 | |
7044cc56 KV |
2568 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2569 | ||
2570 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2571 | memset(pspoll, 0, sizeof(*pspoll)); | |
2572 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2573 | IEEE80211_STYPE_PSPOLL); | |
2574 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2575 | ||
2576 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2577 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2578 | ||
2579 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2580 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2581 | ||
2582 | return skb; | |
2583 | } | |
2584 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2585 | ||
2586 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2587 | struct ieee80211_vif *vif) | |
2588 | { | |
2589 | struct ieee80211_hdr_3addr *nullfunc; | |
2590 | struct ieee80211_sub_if_data *sdata; | |
2591 | struct ieee80211_if_managed *ifmgd; | |
2592 | struct ieee80211_local *local; | |
2593 | struct sk_buff *skb; | |
2594 | ||
2595 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2596 | return NULL; | |
2597 | ||
2598 | sdata = vif_to_sdata(vif); | |
2599 | ifmgd = &sdata->u.mgd; | |
2600 | local = sdata->local; | |
2601 | ||
2602 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2603 | if (!skb) |
7044cc56 | 2604 | return NULL; |
d15b8459 | 2605 | |
7044cc56 KV |
2606 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2607 | ||
2608 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2609 | sizeof(*nullfunc)); | |
2610 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2611 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2612 | IEEE80211_STYPE_NULLFUNC | | |
2613 | IEEE80211_FCTL_TODS); | |
2614 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2615 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2616 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2617 | ||
2618 | return skb; | |
2619 | } | |
2620 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2621 | ||
05e54ea6 KV |
2622 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2623 | struct ieee80211_vif *vif, | |
2624 | const u8 *ssid, size_t ssid_len, | |
b9a9ada1 | 2625 | size_t tailroom) |
05e54ea6 KV |
2626 | { |
2627 | struct ieee80211_sub_if_data *sdata; | |
2628 | struct ieee80211_local *local; | |
2629 | struct ieee80211_hdr_3addr *hdr; | |
2630 | struct sk_buff *skb; | |
2631 | size_t ie_ssid_len; | |
2632 | u8 *pos; | |
2633 | ||
2634 | sdata = vif_to_sdata(vif); | |
2635 | local = sdata->local; | |
2636 | ie_ssid_len = 2 + ssid_len; | |
2637 | ||
2638 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
b9a9ada1 | 2639 | ie_ssid_len + tailroom); |
d15b8459 | 2640 | if (!skb) |
05e54ea6 | 2641 | return NULL; |
05e54ea6 KV |
2642 | |
2643 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2644 | ||
2645 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2646 | memset(hdr, 0, sizeof(*hdr)); | |
2647 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2648 | IEEE80211_STYPE_PROBE_REQ); | |
e83e6541 | 2649 | eth_broadcast_addr(hdr->addr1); |
05e54ea6 | 2650 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); |
e83e6541 | 2651 | eth_broadcast_addr(hdr->addr3); |
05e54ea6 KV |
2652 | |
2653 | pos = skb_put(skb, ie_ssid_len); | |
2654 | *pos++ = WLAN_EID_SSID; | |
2655 | *pos++ = ssid_len; | |
88c868c4 | 2656 | if (ssid_len) |
05e54ea6 KV |
2657 | memcpy(pos, ssid, ssid_len); |
2658 | pos += ssid_len; | |
2659 | ||
05e54ea6 KV |
2660 | return skb; |
2661 | } | |
2662 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2663 | ||
32bfd35d | 2664 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2665 | const void *frame, size_t frame_len, |
e039fa4a | 2666 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2667 | struct ieee80211_rts *rts) |
2668 | { | |
2669 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2670 | |
065e9605 HH |
2671 | rts->frame_control = |
2672 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2673 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2674 | frame_txctl); | |
e2ebc74d JB |
2675 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2676 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2677 | } | |
2678 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2679 | ||
32bfd35d | 2680 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2681 | const void *frame, size_t frame_len, |
e039fa4a | 2682 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2683 | struct ieee80211_cts *cts) |
2684 | { | |
2685 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2686 | |
065e9605 HH |
2687 | cts->frame_control = |
2688 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2689 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2690 | frame_len, frame_txctl); | |
e2ebc74d JB |
2691 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2692 | } | |
2693 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2694 | ||
2695 | struct sk_buff * | |
32bfd35d | 2696 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2697 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2698 | { |
2699 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2700 | struct sk_buff *skb = NULL; |
5cf121c3 | 2701 | struct ieee80211_tx_data tx; |
e2ebc74d | 2702 | struct ieee80211_sub_if_data *sdata; |
d012a605 | 2703 | struct ps_data *ps; |
e039fa4a | 2704 | struct ieee80211_tx_info *info; |
55de908a | 2705 | struct ieee80211_chanctx_conf *chanctx_conf; |
e2ebc74d | 2706 | |
32bfd35d | 2707 | sdata = vif_to_sdata(vif); |
5dfdaf58 | 2708 | |
5dfdaf58 | 2709 | rcu_read_lock(); |
55de908a | 2710 | chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); |
5dfdaf58 | 2711 | |
d012a605 MP |
2712 | if (!chanctx_conf) |
2713 | goto out; | |
2714 | ||
2715 | if (sdata->vif.type == NL80211_IFTYPE_AP) { | |
2716 | struct beacon_data *beacon = | |
2717 | rcu_dereference(sdata->u.ap.beacon); | |
2718 | ||
2719 | if (!beacon || !beacon->head) | |
2720 | goto out; | |
2721 | ||
2722 | ps = &sdata->u.ap.ps; | |
3f52b7e3 MP |
2723 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
2724 | ps = &sdata->u.mesh.ps; | |
d012a605 | 2725 | } else { |
747cf5e9 | 2726 | goto out; |
d012a605 | 2727 | } |
5dfdaf58 | 2728 | |
d012a605 | 2729 | if (ps->dtim_count != 0 || !ps->dtim_bc_mc) |
747cf5e9 | 2730 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2731 | |
e2ebc74d | 2732 | while (1) { |
d012a605 | 2733 | skb = skb_dequeue(&ps->bc_buf); |
e2ebc74d | 2734 | if (!skb) |
747cf5e9 | 2735 | goto out; |
e2ebc74d JB |
2736 | local->total_ps_buffered--; |
2737 | ||
d012a605 | 2738 | if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) { |
e2ebc74d JB |
2739 | struct ieee80211_hdr *hdr = |
2740 | (struct ieee80211_hdr *) skb->data; | |
2741 | /* more buffered multicast/broadcast frames ==> set | |
2742 | * MoreData flag in IEEE 802.11 header to inform PS | |
2743 | * STAs */ | |
2744 | hdr->frame_control |= | |
2745 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2746 | } | |
2747 | ||
7cbf9d01 MP |
2748 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
2749 | sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev); | |
3b8d81e0 | 2750 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2751 | break; |
2752 | dev_kfree_skb_any(skb); | |
2753 | } | |
e039fa4a JB |
2754 | |
2755 | info = IEEE80211_SKB_CB(skb); | |
2756 | ||
5cf121c3 | 2757 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
4bf88530 | 2758 | info->band = chanctx_conf->def.chan->band; |
e2ebc74d | 2759 | |
97b045d6 | 2760 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2761 | skb = NULL; |
97b045d6 | 2762 | out: |
d0709a65 | 2763 | rcu_read_unlock(); |
e2ebc74d JB |
2764 | |
2765 | return skb; | |
2766 | } | |
2767 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2768 | |
55de908a JB |
2769 | void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata, |
2770 | struct sk_buff *skb, int tid, | |
2771 | enum ieee80211_band band) | |
3b8d81e0 | 2772 | { |
353d09c6 | 2773 | int ac = ieee802_1d_to_ac[tid & 7]; |
3a25a8c8 | 2774 | |
3b8d81e0 JB |
2775 | skb_set_mac_header(skb, 0); |
2776 | skb_set_network_header(skb, 0); | |
2777 | skb_set_transport_header(skb, 0); | |
2778 | ||
3a25a8c8 | 2779 | skb_set_queue_mapping(skb, ac); |
cf6bb79a | 2780 | skb->priority = tid; |
cf0277e7 | 2781 | |
89afe614 JB |
2782 | skb->dev = sdata->dev; |
2783 | ||
3d34deb6 JB |
2784 | /* |
2785 | * The other path calling ieee80211_xmit is from the tasklet, | |
2786 | * and while we can handle concurrent transmissions locking | |
2787 | * requirements are that we do not come into tx with bhs on. | |
2788 | */ | |
2789 | local_bh_disable(); | |
55de908a | 2790 | ieee80211_xmit(sdata, skb, band); |
3d34deb6 | 2791 | local_bh_enable(); |
3b8d81e0 | 2792 | } |