Commit | Line | Data |
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e2ebc74d JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * | |
12 | * Transmit and frame generation functions. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/etherdevice.h> | |
19 | #include <linux/bitmap.h> | |
d4e46a3d | 20 | #include <linux/rcupdate.h> |
bc3b2d7f | 21 | #include <linux/export.h> |
881d966b | 22 | #include <net/net_namespace.h> |
e2ebc74d JB |
23 | #include <net/ieee80211_radiotap.h> |
24 | #include <net/cfg80211.h> | |
25 | #include <net/mac80211.h> | |
26 | #include <asm/unaligned.h> | |
27 | ||
28 | #include "ieee80211_i.h" | |
24487981 | 29 | #include "driver-ops.h" |
2c8dccc7 | 30 | #include "led.h" |
33b64eb2 | 31 | #include "mesh.h" |
e2ebc74d JB |
32 | #include "wep.h" |
33 | #include "wpa.h" | |
34 | #include "wme.h" | |
2c8dccc7 | 35 | #include "rate.h" |
e2ebc74d | 36 | |
e2ebc74d JB |
37 | /* misc utils */ |
38 | ||
252b86c4 JB |
39 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, |
40 | struct sk_buff *skb, int group_addr, | |
03f93c3d | 41 | int next_frag_len) |
e2ebc74d JB |
42 | { |
43 | int rate, mrate, erp, dur, i; | |
2e92e6f2 | 44 | struct ieee80211_rate *txrate; |
e2ebc74d | 45 | struct ieee80211_local *local = tx->local; |
8318d78a | 46 | struct ieee80211_supported_band *sband; |
358c8d9d | 47 | struct ieee80211_hdr *hdr; |
252b86c4 | 48 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b JB |
49 | |
50 | /* assume HW handles this */ | |
51 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS) | |
52 | return 0; | |
53 | ||
54 | /* uh huh? */ | |
55 | if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) | |
56 | return 0; | |
e2ebc74d | 57 | |
2e92e6f2 | 58 | sband = local->hw.wiphy->bands[tx->channel->band]; |
e6a9854b | 59 | txrate = &sband->bitrates[info->control.rates[0].idx]; |
8318d78a | 60 | |
e6a9854b | 61 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
62 | |
63 | /* | |
64 | * data and mgmt (except PS Poll): | |
65 | * - during CFP: 32768 | |
66 | * - during contention period: | |
67 | * if addr1 is group address: 0 | |
68 | * if more fragments = 0 and addr1 is individual address: time to | |
69 | * transmit one ACK plus SIFS | |
70 | * if more fragments = 1 and addr1 is individual address: time to | |
71 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
72 | * | |
73 | * IEEE 802.11, 9.6: | |
74 | * - control response frame (CTS or ACK) shall be transmitted using the | |
75 | * same rate as the immediately previous frame in the frame exchange | |
76 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
77 | * at the highest possible rate belonging to the PHY rates in the | |
78 | * BSSBasicRateSet | |
79 | */ | |
252b86c4 | 80 | hdr = (struct ieee80211_hdr *)skb->data; |
358c8d9d | 81 | if (ieee80211_is_ctl(hdr->frame_control)) { |
e2ebc74d | 82 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 83 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
84 | * needs to be updated to support duration field calculation. |
85 | * | |
86 | * RTS: time needed to transmit pending data/mgmt frame plus | |
87 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
88 | * CTS: duration of immediately previous RTS minus time | |
89 | * required to transmit CTS and its SIFS | |
90 | * ACK: 0 if immediately previous directed data/mgmt had | |
91 | * more=0, with more=1 duration in ACK frame is duration | |
92 | * from previous frame minus time needed to transmit ACK | |
93 | * and its SIFS | |
94 | * PS Poll: BIT(15) | BIT(14) | aid | |
95 | */ | |
96 | return 0; | |
97 | } | |
98 | ||
99 | /* data/mgmt */ | |
100 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 101 | return cpu_to_le16(32768); |
e2ebc74d JB |
102 | |
103 | if (group_addr) /* Group address as the destination - no ACK */ | |
104 | return 0; | |
105 | ||
106 | /* Individual destination address: | |
107 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
108 | * CTS and ACK frames shall be transmitted using the highest rate in | |
109 | * basic rate set that is less than or equal to the rate of the | |
110 | * immediately previous frame and that is using the same modulation | |
111 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
112 | * the highest mandatory rate of the PHY that is less than or equal to | |
113 | * the rate of the previous frame is used. | |
114 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
115 | */ | |
116 | rate = -1; | |
8318d78a JB |
117 | /* use lowest available if everything fails */ |
118 | mrate = sband->bitrates[0].bitrate; | |
119 | for (i = 0; i < sband->n_bitrates; i++) { | |
120 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 121 | |
8318d78a JB |
122 | if (r->bitrate > txrate->bitrate) |
123 | break; | |
e2ebc74d | 124 | |
bda3933a | 125 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
8318d78a JB |
126 | rate = r->bitrate; |
127 | ||
128 | switch (sband->band) { | |
129 | case IEEE80211_BAND_2GHZ: { | |
130 | u32 flag; | |
131 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
132 | flag = IEEE80211_RATE_MANDATORY_G; | |
133 | else | |
134 | flag = IEEE80211_RATE_MANDATORY_B; | |
135 | if (r->flags & flag) | |
136 | mrate = r->bitrate; | |
137 | break; | |
138 | } | |
139 | case IEEE80211_BAND_5GHZ: | |
140 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
141 | mrate = r->bitrate; | |
142 | break; | |
143 | case IEEE80211_NUM_BANDS: | |
144 | WARN_ON(1); | |
145 | break; | |
146 | } | |
e2ebc74d JB |
147 | } |
148 | if (rate == -1) { | |
149 | /* No matching basic rate found; use highest suitable mandatory | |
150 | * PHY rate */ | |
151 | rate = mrate; | |
152 | } | |
153 | ||
6674f210 SW |
154 | /* Don't calculate ACKs for QoS Frames with NoAck Policy set */ |
155 | if (ieee80211_is_data_qos(hdr->frame_control) && | |
156 | *(ieee80211_get_qos_ctl(hdr)) | IEEE80211_QOS_CTL_ACK_POLICY_NOACK) | |
157 | dur = 0; | |
158 | else | |
159 | /* Time needed to transmit ACK | |
160 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
161 | * to closest integer */ | |
162 | dur = ieee80211_frame_duration(local, 10, rate, erp, | |
bda3933a | 163 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
164 | |
165 | if (next_frag_len) { | |
166 | /* Frame is fragmented: duration increases with time needed to | |
167 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
168 | dur *= 2; /* ACK + SIFS */ | |
169 | /* next fragment */ | |
170 | dur += ieee80211_frame_duration(local, next_frag_len, | |
8318d78a | 171 | txrate->bitrate, erp, |
bda3933a | 172 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
173 | } |
174 | ||
03f93c3d | 175 | return cpu_to_le16(dur); |
e2ebc74d JB |
176 | } |
177 | ||
42b16b3f | 178 | static inline int is_ieee80211_device(struct ieee80211_local *local, |
133b8226 | 179 | struct net_device *dev) |
e2ebc74d | 180 | { |
133b8226 | 181 | return local == wdev_priv(dev->ieee80211_ptr); |
e2ebc74d JB |
182 | } |
183 | ||
184 | /* tx handlers */ | |
5c1b98a5 KV |
185 | static ieee80211_tx_result debug_noinline |
186 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
187 | { | |
188 | struct ieee80211_local *local = tx->local; | |
0c74211d | 189 | struct ieee80211_if_managed *ifmgd; |
5c1b98a5 KV |
190 | |
191 | /* driver doesn't support power save */ | |
192 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
193 | return TX_CONTINUE; | |
194 | ||
195 | /* hardware does dynamic power save */ | |
196 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
197 | return TX_CONTINUE; | |
198 | ||
199 | /* dynamic power save disabled */ | |
200 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
201 | return TX_CONTINUE; | |
202 | ||
203 | /* we are scanning, don't enable power save */ | |
204 | if (local->scanning) | |
205 | return TX_CONTINUE; | |
206 | ||
207 | if (!local->ps_sdata) | |
208 | return TX_CONTINUE; | |
209 | ||
210 | /* No point if we're going to suspend */ | |
211 | if (local->quiescing) | |
212 | return TX_CONTINUE; | |
213 | ||
0c74211d KV |
214 | /* dynamic ps is supported only in managed mode */ |
215 | if (tx->sdata->vif.type != NL80211_IFTYPE_STATION) | |
216 | return TX_CONTINUE; | |
217 | ||
218 | ifmgd = &tx->sdata->u.mgd; | |
219 | ||
220 | /* | |
221 | * Don't wakeup from power save if u-apsd is enabled, voip ac has | |
222 | * u-apsd enabled and the frame is in voip class. This effectively | |
223 | * means that even if all access categories have u-apsd enabled, in | |
224 | * practise u-apsd is only used with the voip ac. This is a | |
225 | * workaround for the case when received voip class packets do not | |
226 | * have correct qos tag for some reason, due the network or the | |
227 | * peer application. | |
228 | * | |
229 | * Note: local->uapsd_queues access is racy here. If the value is | |
230 | * changed via debugfs, user needs to reassociate manually to have | |
231 | * everything in sync. | |
232 | */ | |
233 | if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) | |
234 | && (local->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) | |
235 | && skb_get_queue_mapping(tx->skb) == 0) | |
236 | return TX_CONTINUE; | |
237 | ||
5c1b98a5 KV |
238 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { |
239 | ieee80211_stop_queues_by_reason(&local->hw, | |
240 | IEEE80211_QUEUE_STOP_REASON_PS); | |
db28569a | 241 | ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; |
5c1b98a5 KV |
242 | ieee80211_queue_work(&local->hw, |
243 | &local->dynamic_ps_disable_work); | |
244 | } | |
245 | ||
5db1c07c LC |
246 | /* Don't restart the timer if we're not disassociated */ |
247 | if (!ifmgd->associated) | |
248 | return TX_CONTINUE; | |
249 | ||
5c1b98a5 KV |
250 | mod_timer(&local->dynamic_ps_timer, jiffies + |
251 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
252 | ||
253 | return TX_CONTINUE; | |
254 | } | |
e2ebc74d | 255 | |
d9e8a70f | 256 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 257 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 258 | { |
358c8d9d | 259 | |
e039fa4a | 260 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 261 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
c2c98fde | 262 | bool assoc = false; |
e2ebc74d | 263 | |
e039fa4a | 264 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 265 | return TX_CONTINUE; |
58d4185e | 266 | |
b23b025f BG |
267 | if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) && |
268 | test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) && | |
a9a6ffff KV |
269 | !ieee80211_is_probe_req(hdr->frame_control) && |
270 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
271 | /* | |
272 | * When software scanning only nullfunc frames (to notify | |
273 | * the sleep state to the AP) and probe requests (for the | |
274 | * active scan) are allowed, all other frames should not be | |
275 | * sent and we should not get here, but if we do | |
276 | * nonetheless, drop them to avoid sending them | |
277 | * off-channel. See the link below and | |
278 | * ieee80211_start_scan() for more. | |
279 | * | |
280 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
281 | */ | |
9ae54c84 | 282 | return TX_DROP; |
e2ebc74d | 283 | |
1be7fe8d BJ |
284 | if (tx->sdata->vif.type == NL80211_IFTYPE_WDS) |
285 | return TX_CONTINUE; | |
286 | ||
05c914fe | 287 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
288 | return TX_CONTINUE; |
289 | ||
5cf121c3 | 290 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 291 | return TX_CONTINUE; |
e2ebc74d | 292 | |
c2c98fde JB |
293 | if (tx->sta) |
294 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
e2ebc74d | 295 | |
5cf121c3 | 296 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
c2c98fde | 297 | if (unlikely(!assoc && |
05c914fe | 298 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
358c8d9d | 299 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d JB |
300 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
301 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
0c68ae26 | 302 | "associated station %pM\n", |
47846c9b | 303 | tx->sdata->name, hdr->addr1); |
e2ebc74d JB |
304 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
305 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
9ae54c84 | 306 | return TX_DROP; |
e2ebc74d JB |
307 | } |
308 | } else { | |
358c8d9d | 309 | if (unlikely(ieee80211_is_data(hdr->frame_control) && |
e2ebc74d | 310 | tx->local->num_sta == 0 && |
05c914fe | 311 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC)) { |
e2ebc74d JB |
312 | /* |
313 | * No associated STAs - no need to send multicast | |
314 | * frames. | |
315 | */ | |
9ae54c84 | 316 | return TX_DROP; |
e2ebc74d | 317 | } |
9ae54c84 | 318 | return TX_CONTINUE; |
e2ebc74d JB |
319 | } |
320 | ||
9ae54c84 | 321 | return TX_CONTINUE; |
e2ebc74d JB |
322 | } |
323 | ||
e2ebc74d JB |
324 | /* This function is called whenever the AP is about to exceed the maximum limit |
325 | * of buffered frames for power saving STAs. This situation should not really | |
326 | * happen often during normal operation, so dropping the oldest buffered packet | |
327 | * from each queue should be OK to make some room for new frames. */ | |
328 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
329 | { | |
330 | int total = 0, purged = 0; | |
331 | struct sk_buff *skb; | |
332 | struct ieee80211_sub_if_data *sdata; | |
333 | struct sta_info *sta; | |
334 | ||
79010420 JB |
335 | /* |
336 | * virtual interfaces are protected by RCU | |
337 | */ | |
338 | rcu_read_lock(); | |
339 | ||
340 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
e2ebc74d | 341 | struct ieee80211_if_ap *ap; |
05c914fe | 342 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
e2ebc74d JB |
343 | continue; |
344 | ap = &sdata->u.ap; | |
345 | skb = skb_dequeue(&ap->ps_bc_buf); | |
346 | if (skb) { | |
347 | purged++; | |
348 | dev_kfree_skb(skb); | |
349 | } | |
350 | total += skb_queue_len(&ap->ps_bc_buf); | |
351 | } | |
e2ebc74d | 352 | |
948d887d JB |
353 | /* |
354 | * Drop one frame from each station from the lowest-priority | |
355 | * AC that has frames at all. | |
356 | */ | |
d0709a65 | 357 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
948d887d JB |
358 | int ac; |
359 | ||
360 | for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) { | |
361 | skb = skb_dequeue(&sta->ps_tx_buf[ac]); | |
362 | total += skb_queue_len(&sta->ps_tx_buf[ac]); | |
363 | if (skb) { | |
364 | purged++; | |
365 | dev_kfree_skb(skb); | |
366 | break; | |
367 | } | |
e2ebc74d | 368 | } |
e2ebc74d | 369 | } |
d0709a65 JB |
370 | |
371 | rcu_read_unlock(); | |
e2ebc74d JB |
372 | |
373 | local->total_ps_buffered = total; | |
54223995 | 374 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0fb9a9ec JP |
375 | wiphy_debug(local->hw.wiphy, "PS buffers full - purged %d frames\n", |
376 | purged); | |
f4ea83dd | 377 | #endif |
e2ebc74d JB |
378 | } |
379 | ||
9ae54c84 | 380 | static ieee80211_tx_result |
5cf121c3 | 381 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 382 | { |
e039fa4a | 383 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 384 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 385 | |
7d54d0dd JB |
386 | /* |
387 | * broadcast/multicast frame | |
388 | * | |
389 | * If any of the associated stations is in power save mode, | |
390 | * the frame is buffered to be sent after DTIM beacon frame. | |
391 | * This is done either by the hardware or us. | |
392 | */ | |
393 | ||
3e122be0 JB |
394 | /* powersaving STAs only in AP/VLAN mode */ |
395 | if (!tx->sdata->bss) | |
396 | return TX_CONTINUE; | |
397 | ||
398 | /* no buffering for ordered frames */ | |
358c8d9d | 399 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 400 | return TX_CONTINUE; |
7d54d0dd JB |
401 | |
402 | /* no stations in PS mode */ | |
403 | if (!atomic_read(&tx->sdata->bss->num_sta_ps)) | |
9ae54c84 | 404 | return TX_CONTINUE; |
7d54d0dd | 405 | |
62b517cb | 406 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
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 | ||
416 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) { | |
54223995 | 417 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
62b1208e JB |
418 | if (net_ratelimit()) |
419 | printk(KERN_DEBUG "%s: BC TX buffer full - dropping the oldest frame\n", | |
47846c9b | 420 | tx->sdata->name); |
f4ea83dd | 421 | #endif |
62b1208e JB |
422 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); |
423 | } else | |
424 | tx->local->total_ps_buffered++; | |
e2ebc74d | 425 | |
62b1208e | 426 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); |
7d54d0dd | 427 | |
62b1208e | 428 | return TX_QUEUED; |
e2ebc74d JB |
429 | } |
430 | ||
fb733336 JM |
431 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
432 | struct sk_buff *skb) | |
433 | { | |
434 | if (!ieee80211_is_mgmt(fc)) | |
435 | return 0; | |
436 | ||
c2c98fde | 437 | if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP)) |
fb733336 JM |
438 | return 0; |
439 | ||
440 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
441 | skb->data)) | |
442 | return 0; | |
443 | ||
444 | return 1; | |
445 | } | |
446 | ||
9ae54c84 | 447 | static ieee80211_tx_result |
5cf121c3 | 448 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
449 | { |
450 | struct sta_info *sta = tx->sta; | |
e039fa4a | 451 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 452 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
3393a608 | 453 | struct ieee80211_local *local = tx->local; |
e2ebc74d | 454 | |
f64f9e71 JP |
455 | if (unlikely(!sta || |
456 | ieee80211_is_probe_resp(hdr->frame_control) || | |
457 | ieee80211_is_auth(hdr->frame_control) || | |
458 | ieee80211_is_assoc_resp(hdr->frame_control) || | |
459 | ieee80211_is_reassoc_resp(hdr->frame_control))) | |
9ae54c84 | 460 | return TX_CONTINUE; |
e2ebc74d | 461 | |
c2c98fde JB |
462 | if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) || |
463 | test_sta_flag(sta, WLAN_STA_PS_DRIVER)) && | |
47086fc5 | 464 | !(info->flags & IEEE80211_TX_CTL_POLL_RESPONSE))) { |
948d887d JB |
465 | int ac = skb_get_queue_mapping(tx->skb); |
466 | ||
e2ebc74d | 467 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
948d887d JB |
468 | printk(KERN_DEBUG "STA %pM aid %d: PS buffer for AC %d\n", |
469 | sta->sta.addr, sta->sta.aid, ac); | |
e2ebc74d | 470 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
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]); | |
54223995 | 475 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
948d887d JB |
476 | if (net_ratelimit()) |
477 | printk(KERN_DEBUG "%s: STA %pM TX buffer for " | |
478 | "AC %d full - dropping oldest frame\n", | |
479 | tx->sdata->name, sta->sta.addr, ac); | |
f4ea83dd | 480 | #endif |
e2ebc74d JB |
481 | dev_kfree_skb(old); |
482 | } else | |
483 | tx->local->total_ps_buffered++; | |
004c872e | 484 | |
e039fa4a | 485 | info->control.jiffies = jiffies; |
5061b0c2 | 486 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 487 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
948d887d | 488 | skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb); |
3393a608 JO |
489 | |
490 | if (!timer_pending(&local->sta_cleanup)) | |
491 | mod_timer(&local->sta_cleanup, | |
492 | round_jiffies(jiffies + | |
493 | STA_INFO_CLEANUP_INTERVAL)); | |
494 | ||
c868cb35 JB |
495 | /* |
496 | * We queued up some frames, so the TIM bit might | |
497 | * need to be set, recalculate it. | |
498 | */ | |
499 | sta_info_recalc_tim(sta); | |
500 | ||
9ae54c84 | 501 | return TX_QUEUED; |
e2ebc74d JB |
502 | } |
503 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
c2c98fde | 504 | else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) { |
47086fc5 JB |
505 | printk(KERN_DEBUG |
506 | "%s: STA %pM in PS mode, but polling/in SP -> send frame\n", | |
507 | tx->sdata->name, sta->sta.addr); | |
e2ebc74d JB |
508 | } |
509 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d | 510 | |
9ae54c84 | 511 | return TX_CONTINUE; |
e2ebc74d JB |
512 | } |
513 | ||
d9e8a70f | 514 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 515 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 516 | { |
5cf121c3 | 517 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 518 | return TX_CONTINUE; |
e2ebc74d | 519 | |
5cf121c3 | 520 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
521 | return ieee80211_tx_h_unicast_ps_buf(tx); |
522 | else | |
523 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
524 | } | |
525 | ||
a621fa4d JB |
526 | static ieee80211_tx_result debug_noinline |
527 | ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx) | |
528 | { | |
529 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
530 | ||
531 | if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol && | |
532 | tx->sdata->control_port_no_encrypt)) | |
533 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
534 | ||
535 | return TX_CONTINUE; | |
536 | } | |
537 | ||
d9e8a70f | 538 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 539 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 540 | { |
d3feaf5a | 541 | struct ieee80211_key *key = NULL; |
e039fa4a | 542 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 543 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 544 | |
3b8d81e0 | 545 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 546 | tx->key = NULL; |
e31b8213 | 547 | else if (tx->sta && (key = rcu_dereference(tx->sta->ptk))) |
d4e46a3d | 548 | tx->key = key; |
3cfcf6ac | 549 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
ecbcd324 JM |
550 | is_multicast_ether_addr(hdr->addr1) && |
551 | ieee80211_is_robust_mgmt_frame(hdr) && | |
3cfcf6ac JM |
552 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) |
553 | tx->key = key; | |
f7e0104c JB |
554 | else if (is_multicast_ether_addr(hdr->addr1) && |
555 | (key = rcu_dereference(tx->sdata->default_multicast_key))) | |
556 | tx->key = key; | |
557 | else if (!is_multicast_ether_addr(hdr->addr1) && | |
558 | (key = rcu_dereference(tx->sdata->default_unicast_key))) | |
d4e46a3d | 559 | tx->key = key; |
e2ebc74d | 560 | else if (tx->sdata->drop_unencrypted && |
a621fa4d | 561 | (tx->skb->protocol != tx->sdata->control_port_protocol) && |
e0463f50 JM |
562 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
563 | (!ieee80211_is_robust_mgmt_frame(hdr) || | |
564 | (ieee80211_is_action(hdr->frame_control) && | |
c2c98fde | 565 | tx->sta && test_sta_flag(tx->sta, WLAN_STA_MFP)))) { |
e2ebc74d | 566 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 567 | return TX_DROP; |
176e4f84 | 568 | } else |
e2ebc74d JB |
569 | tx->key = NULL; |
570 | ||
571 | if (tx->key) { | |
813d7669 JB |
572 | bool skip_hw = false; |
573 | ||
e2ebc74d | 574 | tx->key->tx_rx_count++; |
011bfcc4 | 575 | /* TODO: add threshold stuff again */ |
176e4f84 | 576 | |
97359d12 JB |
577 | switch (tx->key->conf.cipher) { |
578 | case WLAN_CIPHER_SUITE_WEP40: | |
579 | case WLAN_CIPHER_SUITE_WEP104: | |
97359d12 | 580 | case WLAN_CIPHER_SUITE_TKIP: |
358c8d9d | 581 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
582 | tx->key = NULL; |
583 | break; | |
97359d12 | 584 | case WLAN_CIPHER_SUITE_CCMP: |
fb733336 JM |
585 | if (!ieee80211_is_data_present(hdr->frame_control) && |
586 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
587 | tx->skb)) | |
588 | tx->key = NULL; | |
3b43a187 KV |
589 | else |
590 | skip_hw = (tx->key->conf.flags & | |
591 | IEEE80211_KEY_FLAG_SW_MGMT) && | |
592 | ieee80211_is_mgmt(hdr->frame_control); | |
fb733336 | 593 | break; |
97359d12 | 594 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac JM |
595 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
596 | tx->key = NULL; | |
597 | break; | |
176e4f84 | 598 | } |
813d7669 | 599 | |
95acac61 JB |
600 | if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED)) |
601 | return TX_DROP; | |
602 | ||
f12553eb | 603 | if (!skip_hw && tx->key && |
382b1655 | 604 | tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) |
813d7669 | 605 | info->control.hw_key = &tx->key->conf; |
e2ebc74d JB |
606 | } |
607 | ||
9ae54c84 | 608 | return TX_CONTINUE; |
e2ebc74d JB |
609 | } |
610 | ||
d9e8a70f | 611 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 612 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 613 | { |
e039fa4a | 614 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
615 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
616 | struct ieee80211_supported_band *sband; | |
617 | struct ieee80211_rate *rate; | |
a2c40249 SZ |
618 | int i; |
619 | u32 len; | |
e6a9854b JB |
620 | bool inval = false, rts = false, short_preamble = false; |
621 | struct ieee80211_tx_rate_control txrc; | |
c2c98fde | 622 | bool assoc = false; |
8318d78a | 623 | |
e6a9854b | 624 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 625 | |
e6a9854b | 626 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
58d4185e | 627 | |
a2c40249 | 628 | len = min_t(u32, tx->skb->len + FCS_LEN, |
b9a5f8ca | 629 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
630 | |
631 | /* set up the tx rate control struct we give the RC algo */ | |
632 | txrc.hw = local_to_hw(tx->local); | |
633 | txrc.sband = sband; | |
634 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
635 | txrc.skb = tx->skb; | |
636 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
637 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[tx->channel->band]; |
638 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
639 | txrc.max_rate_idx = -1; | |
640 | else | |
641 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 FF |
642 | txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || |
643 | tx->sdata->vif.type == NL80211_IFTYPE_ADHOC); | |
e6a9854b JB |
644 | |
645 | /* set up RTS protection if desired */ | |
b9a5f8ca | 646 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 647 | txrc.rts = rts = true; |
e2ebc74d | 648 | } |
e2ebc74d | 649 | |
e6a9854b JB |
650 | /* |
651 | * Use short preamble if the BSS can handle it, but not for | |
652 | * management frames unless we know the receiver can handle | |
653 | * that -- the management frame might be to a station that | |
654 | * just wants a probe response. | |
655 | */ | |
656 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
657 | (ieee80211_is_data(hdr->frame_control) || | |
c2c98fde | 658 | (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) |
e6a9854b | 659 | txrc.short_preamble = short_preamble = true; |
e2ebc74d | 660 | |
c2c98fde JB |
661 | if (tx->sta) |
662 | assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC); | |
b770b43e LR |
663 | |
664 | /* | |
665 | * Lets not bother rate control if we're associated and cannot | |
666 | * talk to the sta. This should not happen. | |
667 | */ | |
c2c98fde | 668 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc && |
b770b43e LR |
669 | !rate_usable_index_exists(sband, &tx->sta->sta), |
670 | "%s: Dropped data frame as no usable bitrate found while " | |
671 | "scanning and associated. Target station: " | |
672 | "%pM on %d GHz band\n", | |
47846c9b | 673 | tx->sdata->name, hdr->addr1, |
b770b43e LR |
674 | tx->channel->band ? 5 : 2)) |
675 | return TX_DROP; | |
2e92e6f2 | 676 | |
b770b43e LR |
677 | /* |
678 | * If we're associated with the sta at this point we know we can at | |
679 | * least send the frame at the lowest bit rate. | |
680 | */ | |
e6a9854b JB |
681 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
682 | ||
683 | if (unlikely(info->control.rates[0].idx < 0)) | |
684 | return TX_DROP; | |
685 | ||
c1ce5a74 | 686 | if (txrc.reported_rate.idx < 0) { |
e6a9854b | 687 | txrc.reported_rate = info->control.rates[0]; |
c1ce5a74 HS |
688 | if (tx->sta && ieee80211_is_data(hdr->frame_control)) |
689 | tx->sta->last_tx_rate = txrc.reported_rate; | |
690 | } else if (tx->sta) | |
e6a9854b | 691 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 692 | |
e6a9854b JB |
693 | if (unlikely(!info->control.rates[0].count)) |
694 | info->control.rates[0].count = 1; | |
e2ebc74d | 695 | |
9955151d GS |
696 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
697 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
698 | info->control.rates[0].count = 1; | |
699 | ||
e6a9854b JB |
700 | if (is_multicast_ether_addr(hdr->addr1)) { |
701 | /* | |
702 | * XXX: verify the rate is in the basic rateset | |
703 | */ | |
704 | return TX_CONTINUE; | |
e2ebc74d JB |
705 | } |
706 | ||
e6a9854b JB |
707 | /* |
708 | * set up the RTS/CTS rate as the fastest basic rate | |
709 | * that is not faster than the data rate | |
710 | * | |
711 | * XXX: Should this check all retry rates? | |
712 | */ | |
713 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
714 | s8 baserate = 0; | |
715 | ||
716 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
717 | ||
718 | for (i = 0; i < sband->n_bitrates; i++) { | |
719 | /* must be a basic rate */ | |
720 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
721 | continue; | |
722 | /* must not be faster than the data rate */ | |
723 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
724 | continue; | |
725 | /* maximum */ | |
726 | if (sband->bitrates[baserate].bitrate < | |
727 | sband->bitrates[i].bitrate) | |
728 | baserate = i; | |
729 | } | |
730 | ||
731 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
732 | } |
733 | ||
e6a9854b JB |
734 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
735 | /* | |
736 | * make sure there's no valid rate following | |
737 | * an invalid one, just in case drivers don't | |
738 | * take the API seriously to stop at -1. | |
739 | */ | |
740 | if (inval) { | |
741 | info->control.rates[i].idx = -1; | |
742 | continue; | |
743 | } | |
744 | if (info->control.rates[i].idx < 0) { | |
745 | inval = true; | |
746 | continue; | |
747 | } | |
8318d78a | 748 | |
e6a9854b JB |
749 | /* |
750 | * For now assume MCS is already set up correctly, this | |
751 | * needs to be fixed. | |
752 | */ | |
753 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
754 | WARN_ON(info->control.rates[i].idx > 76); | |
755 | continue; | |
756 | } | |
e2ebc74d | 757 | |
e6a9854b JB |
758 | /* set up RTS protection if desired */ |
759 | if (rts) | |
760 | info->control.rates[i].flags |= | |
761 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 762 | |
e6a9854b | 763 | /* RC is busted */ |
075cbc9e S |
764 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
765 | sband->n_bitrates)) { | |
e6a9854b JB |
766 | info->control.rates[i].idx = -1; |
767 | continue; | |
8318d78a | 768 | } |
e2ebc74d | 769 | |
e6a9854b JB |
770 | rate = &sband->bitrates[info->control.rates[i].idx]; |
771 | ||
772 | /* set up short preamble */ | |
773 | if (short_preamble && | |
774 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
775 | info->control.rates[i].flags |= | |
776 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
777 | ||
778 | /* set up G protection */ | |
779 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
780 | rate->flags & IEEE80211_RATE_ERP_G) | |
781 | info->control.rates[i].flags |= | |
782 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
783 | } |
784 | ||
e6a9854b JB |
785 | return TX_CONTINUE; |
786 | } | |
787 | ||
f591fa5d JB |
788 | static ieee80211_tx_result debug_noinline |
789 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
790 | { | |
791 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
792 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
793 | u16 *seq; | |
794 | u8 *qc; | |
795 | int tid; | |
796 | ||
25d834e1 JB |
797 | /* |
798 | * Packet injection may want to control the sequence | |
799 | * number, if we have no matching interface then we | |
800 | * neither assign one ourselves nor ask the driver to. | |
801 | */ | |
5061b0c2 | 802 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
803 | return TX_CONTINUE; |
804 | ||
f591fa5d JB |
805 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
806 | return TX_CONTINUE; | |
807 | ||
808 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
809 | return TX_CONTINUE; | |
810 | ||
49a59543 JB |
811 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) |
812 | return TX_CONTINUE; | |
813 | ||
94778280 JB |
814 | /* |
815 | * Anything but QoS data that has a sequence number field | |
816 | * (is long enough) gets a sequence number from the global | |
817 | * counter. | |
818 | */ | |
f591fa5d | 819 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 820 | /* driver should assign sequence number */ |
f591fa5d | 821 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
822 | /* for pure STA mode without beacons, we can do it */ |
823 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
824 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
825 | return TX_CONTINUE; |
826 | } | |
827 | ||
828 | /* | |
829 | * This should be true for injected/management frames only, for | |
830 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
831 | * above since they are not QoS-data frames. | |
832 | */ | |
833 | if (!tx->sta) | |
834 | return TX_CONTINUE; | |
835 | ||
836 | /* include per-STA, per-TID sequence counter */ | |
837 | ||
838 | qc = ieee80211_get_qos_ctl(hdr); | |
839 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
840 | seq = &tx->sta->tid_seq[tid]; | |
841 | ||
842 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
843 | ||
844 | /* Increase the sequence number. */ | |
845 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
846 | ||
847 | return TX_CONTINUE; | |
848 | } | |
849 | ||
252b86c4 | 850 | static int ieee80211_fragment(struct ieee80211_tx_data *tx, |
2de8e0d9 JB |
851 | struct sk_buff *skb, int hdrlen, |
852 | int frag_threshold) | |
853 | { | |
252b86c4 | 854 | struct ieee80211_local *local = tx->local; |
a1a3fcec | 855 | struct ieee80211_tx_info *info; |
252b86c4 | 856 | struct sk_buff *tmp; |
2de8e0d9 JB |
857 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; |
858 | int pos = hdrlen + per_fragm; | |
859 | int rem = skb->len - hdrlen - per_fragm; | |
860 | ||
861 | if (WARN_ON(rem < 0)) | |
862 | return -EINVAL; | |
863 | ||
252b86c4 JB |
864 | /* first fragment was already added to queue by caller */ |
865 | ||
2de8e0d9 JB |
866 | while (rem) { |
867 | int fraglen = per_fragm; | |
868 | ||
869 | if (fraglen > rem) | |
870 | fraglen = rem; | |
871 | rem -= fraglen; | |
872 | tmp = dev_alloc_skb(local->tx_headroom + | |
873 | frag_threshold + | |
874 | IEEE80211_ENCRYPT_HEADROOM + | |
875 | IEEE80211_ENCRYPT_TAILROOM); | |
876 | if (!tmp) | |
877 | return -ENOMEM; | |
252b86c4 JB |
878 | |
879 | __skb_queue_tail(&tx->skbs, tmp); | |
880 | ||
2de8e0d9 JB |
881 | skb_reserve(tmp, local->tx_headroom + |
882 | IEEE80211_ENCRYPT_HEADROOM); | |
883 | /* copy control information */ | |
884 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
a1a3fcec JB |
885 | |
886 | info = IEEE80211_SKB_CB(tmp); | |
887 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | | |
888 | IEEE80211_TX_CTL_FIRST_FRAGMENT); | |
889 | ||
890 | if (rem) | |
891 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
892 | ||
2de8e0d9 JB |
893 | skb_copy_queue_mapping(tmp, skb); |
894 | tmp->priority = skb->priority; | |
2de8e0d9 | 895 | tmp->dev = skb->dev; |
2de8e0d9 JB |
896 | |
897 | /* copy header and data */ | |
898 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
899 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
900 | ||
901 | pos += fraglen; | |
902 | } | |
903 | ||
252b86c4 | 904 | /* adjust first fragment's length */ |
2de8e0d9 JB |
905 | skb->len = hdrlen + per_fragm; |
906 | return 0; | |
907 | } | |
908 | ||
d9e8a70f | 909 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
910 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
911 | { | |
2de8e0d9 JB |
912 | struct sk_buff *skb = tx->skb; |
913 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
914 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 915 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
916 | int hdrlen; |
917 | int fragnum; | |
e2454948 | 918 | |
252b86c4 JB |
919 | /* no matter what happens, tx->skb moves to tx->skbs */ |
920 | __skb_queue_tail(&tx->skbs, skb); | |
921 | tx->skb = NULL; | |
922 | ||
a26eb27a JB |
923 | if (info->flags & IEEE80211_TX_CTL_DONTFRAG) |
924 | return TX_CONTINUE; | |
925 | ||
926 | if (tx->local->ops->set_frag_threshold) | |
e2454948 JB |
927 | return TX_CONTINUE; |
928 | ||
eefce91a JB |
929 | /* |
930 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 931 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 932 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 933 | */ |
8b30b1fe | 934 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
935 | return TX_DROP; |
936 | ||
065e9605 | 937 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 938 | |
a26eb27a | 939 | /* internal error, why isn't DONTFRAG set? */ |
8ccd8f21 | 940 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 941 | return TX_DROP; |
e6a9854b | 942 | |
2de8e0d9 JB |
943 | /* |
944 | * Now fragment the frame. This will allocate all the fragments and | |
945 | * chain them (using skb as the first fragment) to skb->next. | |
946 | * During transmission, we will remove the successfully transmitted | |
947 | * fragments from this list. When the low-level driver rejects one | |
948 | * of the fragments then we will simply pretend to accept the skb | |
949 | * but store it away as pending. | |
950 | */ | |
252b86c4 | 951 | if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold)) |
2de8e0d9 | 952 | return TX_DROP; |
e6a9854b | 953 | |
2de8e0d9 JB |
954 | /* update duration/seq/flags of fragments */ |
955 | fragnum = 0; | |
252b86c4 JB |
956 | |
957 | skb_queue_walk(&tx->skbs, skb) { | |
2de8e0d9 JB |
958 | int next_len; |
959 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
e6a9854b | 960 | |
2de8e0d9 JB |
961 | hdr = (void *)skb->data; |
962 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 963 | |
252b86c4 | 964 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
2de8e0d9 | 965 | hdr->frame_control |= morefrags; |
e6a9854b JB |
966 | /* |
967 | * No multi-rate retries for fragmented frames, that | |
968 | * would completely throw off the NAV at other STAs. | |
969 | */ | |
970 | info->control.rates[1].idx = -1; | |
971 | info->control.rates[2].idx = -1; | |
972 | info->control.rates[3].idx = -1; | |
973 | info->control.rates[4].idx = -1; | |
974 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 5); | |
975 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
2de8e0d9 JB |
976 | } else { |
977 | hdr->frame_control &= ~morefrags; | |
978 | next_len = 0; | |
e6a9854b | 979 | } |
2de8e0d9 JB |
980 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); |
981 | fragnum++; | |
252b86c4 | 982 | } |
e2ebc74d | 983 | |
9ae54c84 | 984 | return TX_CONTINUE; |
e2ebc74d JB |
985 | } |
986 | ||
feff1f2f JB |
987 | static ieee80211_tx_result debug_noinline |
988 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
989 | { | |
252b86c4 | 990 | struct sk_buff *skb; |
feff1f2f JB |
991 | |
992 | if (!tx->sta) | |
993 | return TX_CONTINUE; | |
994 | ||
995 | tx->sta->tx_packets++; | |
252b86c4 | 996 | skb_queue_walk(&tx->skbs, skb) { |
feff1f2f JB |
997 | tx->sta->tx_fragments++; |
998 | tx->sta->tx_bytes += skb->len; | |
252b86c4 | 999 | } |
feff1f2f JB |
1000 | |
1001 | return TX_CONTINUE; | |
1002 | } | |
1003 | ||
d9e8a70f | 1004 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
1005 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
1006 | { | |
3ffc2a90 JB |
1007 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
1008 | ||
e2454948 JB |
1009 | if (!tx->key) |
1010 | return TX_CONTINUE; | |
1011 | ||
97359d12 JB |
1012 | switch (tx->key->conf.cipher) { |
1013 | case WLAN_CIPHER_SUITE_WEP40: | |
1014 | case WLAN_CIPHER_SUITE_WEP104: | |
e2454948 | 1015 | return ieee80211_crypto_wep_encrypt(tx); |
97359d12 | 1016 | case WLAN_CIPHER_SUITE_TKIP: |
e2454948 | 1017 | return ieee80211_crypto_tkip_encrypt(tx); |
97359d12 | 1018 | case WLAN_CIPHER_SUITE_CCMP: |
e2454948 | 1019 | return ieee80211_crypto_ccmp_encrypt(tx); |
97359d12 | 1020 | case WLAN_CIPHER_SUITE_AES_CMAC: |
3cfcf6ac | 1021 | return ieee80211_crypto_aes_cmac_encrypt(tx); |
3ffc2a90 JB |
1022 | default: |
1023 | /* handle hw-only algorithm */ | |
1024 | if (info->control.hw_key) { | |
1025 | ieee80211_tx_set_protected(tx); | |
1026 | return TX_CONTINUE; | |
1027 | } | |
1028 | break; | |
1029 | ||
e2454948 JB |
1030 | } |
1031 | ||
e2454948 JB |
1032 | return TX_DROP; |
1033 | } | |
1034 | ||
d9e8a70f | 1035 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
1036 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
1037 | { | |
252b86c4 | 1038 | struct sk_buff *skb; |
2de8e0d9 JB |
1039 | struct ieee80211_hdr *hdr; |
1040 | int next_len; | |
1041 | bool group_addr; | |
03f93c3d | 1042 | |
252b86c4 | 1043 | skb_queue_walk(&tx->skbs, skb) { |
2de8e0d9 | 1044 | hdr = (void *) skb->data; |
7e0aae47 JM |
1045 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
1046 | break; /* must not overwrite AID */ | |
252b86c4 JB |
1047 | if (!skb_queue_is_last(&tx->skbs, skb)) { |
1048 | struct sk_buff *next = skb_queue_next(&tx->skbs, skb); | |
1049 | next_len = next->len; | |
1050 | } else | |
1051 | next_len = 0; | |
2de8e0d9 | 1052 | group_addr = is_multicast_ether_addr(hdr->addr1); |
03f93c3d | 1053 | |
2de8e0d9 | 1054 | hdr->duration_id = |
252b86c4 JB |
1055 | ieee80211_duration(tx, skb, group_addr, next_len); |
1056 | } | |
03f93c3d JB |
1057 | |
1058 | return TX_CONTINUE; | |
1059 | } | |
1060 | ||
e2ebc74d JB |
1061 | /* actual transmit path */ |
1062 | ||
a622ab72 JB |
1063 | static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx, |
1064 | struct sk_buff *skb, | |
1065 | struct ieee80211_tx_info *info, | |
1066 | struct tid_ampdu_tx *tid_tx, | |
1067 | int tid) | |
1068 | { | |
1069 | bool queued = false; | |
285fa695 | 1070 | bool reset_agg_timer = false; |
a622ab72 JB |
1071 | |
1072 | if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1073 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1074 | reset_agg_timer = true; |
0ab33703 JB |
1075 | } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { |
1076 | /* | |
1077 | * nothing -- this aggregation session is being started | |
1078 | * but that might still fail with the driver | |
1079 | */ | |
a622ab72 JB |
1080 | } else { |
1081 | spin_lock(&tx->sta->lock); | |
1082 | /* | |
1083 | * Need to re-check now, because we may get here | |
1084 | * | |
1085 | * 1) in the window during which the setup is actually | |
1086 | * already done, but not marked yet because not all | |
1087 | * packets are spliced over to the driver pending | |
1088 | * queue yet -- if this happened we acquire the lock | |
1089 | * either before or after the splice happens, but | |
1090 | * need to recheck which of these cases happened. | |
1091 | * | |
1092 | * 2) during session teardown, if the OPERATIONAL bit | |
1093 | * was cleared due to the teardown but the pointer | |
1094 | * hasn't been assigned NULL yet (or we loaded it | |
1095 | * before it was assigned) -- in this case it may | |
1096 | * now be NULL which means we should just let the | |
1097 | * packet pass through because splicing the frames | |
1098 | * back is already done. | |
1099 | */ | |
40b275b6 | 1100 | tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid); |
a622ab72 JB |
1101 | |
1102 | if (!tid_tx) { | |
1103 | /* do nothing, let packet pass through */ | |
1104 | } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) { | |
1105 | info->flags |= IEEE80211_TX_CTL_AMPDU; | |
285fa695 | 1106 | reset_agg_timer = true; |
a622ab72 JB |
1107 | } else { |
1108 | queued = true; | |
1109 | info->control.vif = &tx->sdata->vif; | |
1110 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1111 | __skb_queue_tail(&tid_tx->pending, skb); | |
1112 | } | |
1113 | spin_unlock(&tx->sta->lock); | |
1114 | } | |
1115 | ||
285fa695 NM |
1116 | /* reset session timer */ |
1117 | if (reset_agg_timer && tid_tx->timeout) | |
1118 | mod_timer(&tid_tx->session_timer, | |
1119 | TU_TO_EXP_TIME(tid_tx->timeout)); | |
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; |
e039fa4a | 1142 | tx->channel = local->hw.conf.channel; |
252b86c4 | 1143 | __skb_queue_head_init(&tx->skbs); |
e2ebc74d | 1144 | |
cd8ffc80 JB |
1145 | /* |
1146 | * If this flag is set to true anywhere, and we get here, | |
1147 | * we are doing the needed processing, so remove the flag | |
1148 | * now. | |
1149 | */ | |
1150 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1151 | ||
58d4185e JB |
1152 | hdr = (struct ieee80211_hdr *) skb->data; |
1153 | ||
3f0e0b22 | 1154 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1155 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1156 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1157 | return TX_DROP; | |
b4d57adb FF |
1158 | } else if (info->flags & IEEE80211_TX_CTL_INJECTED) { |
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 | { |
252b86c4 | 1214 | struct sk_buff *skb, *tmp; |
f8e79ddd | 1215 | struct ieee80211_tx_info *info; |
3b8d81e0 | 1216 | unsigned long flags; |
e2ebc74d | 1217 | |
252b86c4 | 1218 | skb_queue_walk_safe(skbs, skb, tmp) { |
3b8d81e0 JB |
1219 | int q = skb_get_queue_mapping(skb); |
1220 | ||
1221 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
3b8d81e0 | 1222 | if (local->queue_stop_reasons[q] || |
7bb45683 JB |
1223 | (!txpending && !skb_queue_empty(&local->pending[q]))) { |
1224 | /* | |
1225 | * Since queue is stopped, queue up frames for later | |
1226 | * transmission from the tx-pending tasklet when the | |
1227 | * queue is woken again. | |
1228 | */ | |
252b86c4 JB |
1229 | if (txpending) |
1230 | skb_queue_splice(skbs, &local->pending[q]); | |
1231 | else | |
1232 | skb_queue_splice_tail(skbs, &local->pending[q]); | |
7bb45683 JB |
1233 | |
1234 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, | |
1235 | flags); | |
1236 | return false; | |
1237 | } | |
3b8d81e0 | 1238 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
f8e79ddd | 1239 | |
f0e72851 | 1240 | info = IEEE80211_SKB_CB(skb); |
11127e91 JB |
1241 | info->control.vif = vif; |
1242 | info->control.sta = sta; | |
f0e72851 | 1243 | |
11127e91 JB |
1244 | __skb_unlink(skb, skbs); |
1245 | drv_tx(local, skb); | |
1246 | } | |
5061b0c2 | 1247 | |
11127e91 JB |
1248 | return true; |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1253 | */ | |
1254 | static bool __ieee80211_tx(struct ieee80211_local *local, | |
1255 | struct sk_buff_head *skbs, int led_len, | |
1256 | struct sta_info *sta, bool txpending) | |
1257 | { | |
1258 | struct ieee80211_tx_info *info; | |
1259 | struct ieee80211_sub_if_data *sdata; | |
1260 | struct ieee80211_vif *vif; | |
1261 | struct ieee80211_sta *pubsta; | |
1262 | struct sk_buff *skb; | |
1263 | bool result = true; | |
1264 | __le16 fc; | |
5061b0c2 | 1265 | |
11127e91 JB |
1266 | if (WARN_ON(skb_queue_empty(skbs))) |
1267 | return true; | |
ec25acc4 | 1268 | |
11127e91 JB |
1269 | skb = skb_peek(skbs); |
1270 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; | |
1271 | info = IEEE80211_SKB_CB(skb); | |
1272 | sdata = vif_to_sdata(info->control.vif); | |
1273 | if (sta && !sta->uploaded) | |
1274 | sta = NULL; | |
1275 | ||
1276 | if (sta) | |
1277 | pubsta = &sta->sta; | |
1278 | else | |
1279 | pubsta = NULL; | |
1280 | ||
1281 | switch (sdata->vif.type) { | |
1282 | case NL80211_IFTYPE_MONITOR: | |
1283 | sdata = NULL; | |
1284 | vif = NULL; | |
1285 | break; | |
1286 | case NL80211_IFTYPE_AP_VLAN: | |
1287 | sdata = container_of(sdata->bss, | |
1288 | struct ieee80211_sub_if_data, u.ap); | |
1289 | /* fall through */ | |
1290 | default: | |
1291 | vif = &sdata->vif; | |
1292 | break; | |
e2ebc74d | 1293 | } |
2de8e0d9 | 1294 | |
11127e91 JB |
1295 | if (local->ops->tx_frags) |
1296 | drv_tx_frags(local, vif, pubsta, skbs); | |
1297 | else | |
1298 | result = ieee80211_tx_frags(local, vif, pubsta, skbs, | |
1299 | txpending); | |
1300 | ||
74e4dbfd JB |
1301 | ieee80211_tpt_led_trig_tx(local, fc, led_len); |
1302 | ieee80211_led_tx(local, 1); | |
1303 | ||
252b86c4 JB |
1304 | WARN_ON(!skb_queue_empty(skbs)); |
1305 | ||
11127e91 | 1306 | return result; |
e2ebc74d JB |
1307 | } |
1308 | ||
97b045d6 JB |
1309 | /* |
1310 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1311 | * frame was dropped or queued. | |
1312 | */ | |
1313 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1314 | { | |
252b86c4 | 1315 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
97b045d6 | 1316 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1317 | |
9aa4aee3 JB |
1318 | #define CALL_TXH(txh) \ |
1319 | do { \ | |
1320 | res = txh(tx); \ | |
1321 | if (res != TX_CONTINUE) \ | |
1322 | goto txh_done; \ | |
1323 | } while (0) | |
1324 | ||
5c1b98a5 | 1325 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1326 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1327 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
a621fa4d | 1328 | CALL_TXH(ieee80211_tx_h_check_control_port_protocol); |
9aa4aee3 | 1329 | CALL_TXH(ieee80211_tx_h_select_key); |
af65cd96 JB |
1330 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1331 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
c6fcf6bc JB |
1332 | |
1333 | if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) | |
1334 | goto txh_done; | |
1335 | ||
1336 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
9aa4aee3 JB |
1337 | CALL_TXH(ieee80211_tx_h_sequence); |
1338 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1339 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1340 | CALL_TXH(ieee80211_tx_h_stats); |
1341 | CALL_TXH(ieee80211_tx_h_encrypt); | |
8fd369ee AN |
1342 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1343 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1344 | #undef CALL_TXH |
97b045d6 | 1345 | |
d9e8a70f | 1346 | txh_done: |
97b045d6 | 1347 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1348 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
252b86c4 JB |
1349 | if (tx->skb) |
1350 | dev_kfree_skb(tx->skb); | |
1351 | else | |
1352 | __skb_queue_purge(&tx->skbs); | |
97b045d6 JB |
1353 | return -1; |
1354 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1355 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1356 | return -1; |
1357 | } | |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
7bb45683 JB |
1362 | /* |
1363 | * Returns false if the frame couldn't be transmitted but was queued instead. | |
1364 | */ | |
1365 | static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, | |
3b8d81e0 | 1366 | struct sk_buff *skb, bool txpending) |
e2ebc74d | 1367 | { |
3b8d81e0 | 1368 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1369 | struct ieee80211_tx_data tx; |
97b045d6 | 1370 | ieee80211_tx_result res_prepare; |
e039fa4a | 1371 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7bb45683 | 1372 | bool result = true; |
74e4dbfd | 1373 | int led_len; |
e2ebc74d | 1374 | |
e2ebc74d JB |
1375 | if (unlikely(skb->len < 10)) { |
1376 | dev_kfree_skb(skb); | |
7bb45683 | 1377 | return true; |
e2ebc74d JB |
1378 | } |
1379 | ||
d0709a65 JB |
1380 | rcu_read_lock(); |
1381 | ||
58d4185e | 1382 | /* initialises tx */ |
74e4dbfd | 1383 | led_len = skb->len; |
3b8d81e0 | 1384 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1385 | |
cd8ffc80 | 1386 | if (unlikely(res_prepare == TX_DROP)) { |
e2ebc74d | 1387 | dev_kfree_skb(skb); |
7bb45683 | 1388 | goto out; |
cd8ffc80 | 1389 | } else if (unlikely(res_prepare == TX_QUEUED)) { |
7bb45683 | 1390 | goto out; |
e2ebc74d JB |
1391 | } |
1392 | ||
5cf121c3 | 1393 | tx.channel = local->hw.conf.channel; |
e039fa4a | 1394 | info->band = tx.channel->band; |
e2ebc74d | 1395 | |
7bb45683 | 1396 | if (!invoke_tx_handlers(&tx)) |
74e4dbfd JB |
1397 | result = __ieee80211_tx(local, &tx.skbs, led_len, |
1398 | tx.sta, txpending); | |
97b045d6 | 1399 | out: |
d4e46a3d | 1400 | rcu_read_unlock(); |
7bb45683 | 1401 | return result; |
e2ebc74d JB |
1402 | } |
1403 | ||
1404 | /* device xmit handlers */ | |
1405 | ||
3bff1865 | 1406 | static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata, |
23c0752a JB |
1407 | struct sk_buff *skb, |
1408 | int head_need, bool may_encrypt) | |
1409 | { | |
3bff1865 | 1410 | struct ieee80211_local *local = sdata->local; |
23c0752a JB |
1411 | int tail_need = 0; |
1412 | ||
3bff1865 | 1413 | if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) { |
23c0752a JB |
1414 | tail_need = IEEE80211_ENCRYPT_TAILROOM; |
1415 | tail_need -= skb_tailroom(skb); | |
1416 | tail_need = max_t(int, tail_need, 0); | |
1417 | } | |
1418 | ||
fc7c976d | 1419 | if (skb_cloned(skb)) |
23c0752a | 1420 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
4cd06a34 | 1421 | else if (head_need || tail_need) |
23c0752a | 1422 | I802_DEBUG_INC(local->tx_expand_skb_head); |
4cd06a34 FF |
1423 | else |
1424 | return 0; | |
23c0752a JB |
1425 | |
1426 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
0fb9a9ec JP |
1427 | wiphy_debug(local->hw.wiphy, |
1428 | "failed to reallocate TX buffer\n"); | |
23c0752a JB |
1429 | return -ENOMEM; |
1430 | } | |
1431 | ||
23c0752a JB |
1432 | return 0; |
1433 | } | |
1434 | ||
ce662b44 | 1435 | void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
e2ebc74d | 1436 | { |
3b8d81e0 | 1437 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1438 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1439 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
e2ebc74d | 1440 | int headroom; |
23c0752a | 1441 | bool may_encrypt; |
e2ebc74d | 1442 | |
d84f3234 JB |
1443 | rcu_read_lock(); |
1444 | ||
3b8d81e0 | 1445 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1446 | |
3b8d81e0 | 1447 | headroom = local->tx_headroom; |
23c0752a JB |
1448 | if (may_encrypt) |
1449 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1450 | headroom -= skb_headroom(skb); | |
1451 | headroom = max_t(int, 0, headroom); | |
1452 | ||
3bff1865 | 1453 | if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) { |
23c0752a | 1454 | dev_kfree_skb(skb); |
d84f3234 | 1455 | rcu_read_unlock(); |
3b8d81e0 | 1456 | return; |
e2ebc74d JB |
1457 | } |
1458 | ||
740c1aa3 | 1459 | hdr = (struct ieee80211_hdr *) skb->data; |
5061b0c2 | 1460 | info->control.vif = &sdata->vif; |
e2ebc74d | 1461 | |
cca89496 JC |
1462 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1463 | ieee80211_is_data(hdr->frame_control) && | |
1464 | !is_multicast_ether_addr(hdr->addr1)) | |
1465 | if (mesh_nexthop_lookup(skb, sdata)) { | |
1466 | /* skb queued: don't free */ | |
d84f3234 | 1467 | rcu_read_unlock(); |
cca89496 JC |
1468 | return; |
1469 | } | |
1470 | ||
2154c81c | 1471 | ieee80211_set_qos_hdr(sdata, skb); |
3b8d81e0 | 1472 | ieee80211_tx(sdata, skb, false); |
d84f3234 | 1473 | rcu_read_unlock(); |
e2ebc74d JB |
1474 | } |
1475 | ||
73b9f03a JB |
1476 | static bool ieee80211_parse_tx_radiotap(struct sk_buff *skb) |
1477 | { | |
1478 | struct ieee80211_radiotap_iterator iterator; | |
1479 | struct ieee80211_radiotap_header *rthdr = | |
1480 | (struct ieee80211_radiotap_header *) skb->data; | |
1481 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1482 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len, | |
1483 | NULL); | |
1484 | u16 txflags; | |
1485 | ||
1486 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | | |
1487 | IEEE80211_TX_CTL_DONTFRAG; | |
1488 | ||
1489 | /* | |
1490 | * for every radiotap entry that is present | |
1491 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1492 | * entries present, or -EINVAL on error) | |
1493 | */ | |
1494 | ||
1495 | while (!ret) { | |
1496 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1497 | ||
1498 | if (ret) | |
1499 | continue; | |
1500 | ||
1501 | /* see if this argument is something we can use */ | |
1502 | switch (iterator.this_arg_index) { | |
1503 | /* | |
1504 | * You must take care when dereferencing iterator.this_arg | |
1505 | * for multibyte types... the pointer is not aligned. Use | |
1506 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1507 | * iterator.this_arg for type "type" safely on all arches. | |
1508 | */ | |
1509 | case IEEE80211_RADIOTAP_FLAGS: | |
1510 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1511 | /* | |
1512 | * this indicates that the skb we have been | |
1513 | * handed has the 32-bit FCS CRC at the end... | |
1514 | * we should react to that by snipping it off | |
1515 | * because it will be recomputed and added | |
1516 | * on transmission | |
1517 | */ | |
1518 | if (skb->len < (iterator._max_length + FCS_LEN)) | |
1519 | return false; | |
1520 | ||
1521 | skb_trim(skb, skb->len - FCS_LEN); | |
1522 | } | |
1523 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) | |
1524 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; | |
1525 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) | |
1526 | info->flags &= ~IEEE80211_TX_CTL_DONTFRAG; | |
1527 | break; | |
1528 | ||
1529 | case IEEE80211_RADIOTAP_TX_FLAGS: | |
1530 | txflags = get_unaligned_le16(iterator.this_arg); | |
1531 | if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK) | |
1532 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1533 | break; | |
1534 | ||
1535 | /* | |
1536 | * Please update the file | |
1537 | * Documentation/networking/mac80211-injection.txt | |
1538 | * when parsing new fields here. | |
1539 | */ | |
1540 | ||
1541 | default: | |
1542 | break; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1547 | return false; | |
1548 | ||
1549 | /* | |
1550 | * remove the radiotap header | |
1551 | * iterator->_max_length was sanity-checked against | |
1552 | * skb->len by iterator init | |
1553 | */ | |
1554 | skb_pull(skb, iterator._max_length); | |
1555 | ||
1556 | return true; | |
1557 | } | |
1558 | ||
d0cf9c0d SH |
1559 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1560 | struct net_device *dev) | |
e2ebc74d JB |
1561 | { |
1562 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
47f4d887 | 1563 | struct ieee80211_channel *chan = local->hw.conf.channel; |
e2ebc74d JB |
1564 | struct ieee80211_radiotap_header *prthdr = |
1565 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1566 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f75f5c6f | 1567 | struct ieee80211_hdr *hdr; |
5d9cf4a5 | 1568 | struct ieee80211_sub_if_data *tmp_sdata, *sdata; |
9b8a74e3 | 1569 | u16 len_rthdr; |
5d9cf4a5 | 1570 | int hdrlen; |
e2ebc74d | 1571 | |
47f4d887 LR |
1572 | /* |
1573 | * Frame injection is not allowed if beaconing is not allowed | |
1574 | * or if we need radar detection. Beaconing is usually not allowed when | |
1575 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1576 | * Passive scan is also used in world regulatory domains where | |
1577 | * your country is not known and as such it should be treated as | |
1578 | * NO TX unless the channel is explicitly allowed in which case | |
1579 | * your current regulatory domain would not have the passive scan | |
1580 | * flag. | |
1581 | * | |
1582 | * Since AP mode uses monitor interfaces to inject/TX management | |
1583 | * frames we can make AP mode the exception to this rule once it | |
1584 | * supports radar detection as its implementation can deal with | |
1585 | * radar detection by itself. We can do that later by adding a | |
1586 | * monitor flag interfaces used for AP support. | |
1587 | */ | |
1588 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1589 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1590 | goto fail; | |
1591 | ||
9b8a74e3 AG |
1592 | /* check for not even having the fixed radiotap header part */ |
1593 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1594 | goto fail; /* too short to be possibly valid */ | |
1595 | ||
1596 | /* is it a header version we can trust to find length from? */ | |
1597 | if (unlikely(prthdr->it_version)) | |
1598 | goto fail; /* only version 0 is supported */ | |
1599 | ||
1600 | /* then there must be a radiotap header with a length we can use */ | |
1601 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1602 | ||
1603 | /* does the skb contain enough to deliver on the alleged length? */ | |
1604 | if (unlikely(skb->len < len_rthdr)) | |
1605 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1606 | |
e2ebc74d JB |
1607 | /* |
1608 | * fix up the pointers accounting for the radiotap | |
1609 | * header still being in there. We are being given | |
1610 | * a precooked IEEE80211 header so no need for | |
1611 | * normal processing | |
1612 | */ | |
9b8a74e3 | 1613 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1614 | /* |
9b8a74e3 AG |
1615 | * these are just fixed to the end of the rt area since we |
1616 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1617 | */ |
9b8a74e3 AG |
1618 | skb_set_network_header(skb, len_rthdr); |
1619 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1620 | |
5d9cf4a5 JB |
1621 | if (skb->len < len_rthdr + 2) |
1622 | goto fail; | |
1623 | ||
1624 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); | |
1625 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1626 | ||
1627 | if (skb->len < len_rthdr + hdrlen) | |
1628 | goto fail; | |
1629 | ||
f75f5c6f HS |
1630 | /* |
1631 | * Initialize skb->protocol if the injected frame is a data frame | |
1632 | * carrying a rfc1042 header | |
1633 | */ | |
5d9cf4a5 JB |
1634 | if (ieee80211_is_data(hdr->frame_control) && |
1635 | skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) { | |
1636 | u8 *payload = (u8 *)hdr + hdrlen; | |
1637 | ||
1638 | if (compare_ether_addr(payload, rfc1042_header) == 0) | |
1639 | skb->protocol = cpu_to_be16((payload[6] << 8) | | |
1640 | payload[7]); | |
f75f5c6f HS |
1641 | } |
1642 | ||
3b8d81e0 JB |
1643 | memset(info, 0, sizeof(*info)); |
1644 | ||
5d9cf4a5 | 1645 | info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS | |
73b9f03a JB |
1646 | IEEE80211_TX_CTL_INJECTED; |
1647 | ||
1648 | /* process and remove the injection radiotap header */ | |
1649 | if (!ieee80211_parse_tx_radiotap(skb)) | |
1650 | goto fail; | |
5d9cf4a5 JB |
1651 | |
1652 | rcu_read_lock(); | |
1653 | ||
1654 | /* | |
1655 | * We process outgoing injected frames that have a local address | |
1656 | * we handle as though they are non-injected frames. | |
1657 | * This code here isn't entirely correct, the local MAC address | |
1658 | * isn't always enough to find the interface to use; for proper | |
1659 | * VLAN/WDS support we will need a different mechanism (which | |
1660 | * likely isn't going to be monitor interfaces). | |
1661 | */ | |
1662 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1663 | ||
1664 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) { | |
1665 | if (!ieee80211_sdata_running(tmp_sdata)) | |
1666 | continue; | |
1667 | if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR || | |
1668 | tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN || | |
1669 | tmp_sdata->vif.type == NL80211_IFTYPE_WDS) | |
1670 | continue; | |
1671 | if (compare_ether_addr(tmp_sdata->vif.addr, hdr->addr2) == 0) { | |
1672 | sdata = tmp_sdata; | |
1673 | break; | |
1674 | } | |
1675 | } | |
7351c6bd | 1676 | |
5d9cf4a5 JB |
1677 | ieee80211_xmit(sdata, skb); |
1678 | rcu_read_unlock(); | |
1679 | ||
e2ebc74d | 1680 | return NETDEV_TX_OK; |
9b8a74e3 AG |
1681 | |
1682 | fail: | |
1683 | dev_kfree_skb(skb); | |
1684 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1685 | } |
1686 | ||
1687 | /** | |
1688 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1689 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1690 | * @skb: packet to be sent | |
1691 | * @dev: incoming interface | |
1692 | * | |
1693 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1694 | * not be freed, and caller is responsible for either retrying later or freeing | |
1695 | * skb). | |
1696 | * | |
1697 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1698 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1699 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1700 | * transmission (through low-level driver). | |
1701 | */ | |
d0cf9c0d SH |
1702 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1703 | struct net_device *dev) | |
e2ebc74d | 1704 | { |
133b8226 JB |
1705 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1706 | struct ieee80211_local *local = sdata->local; | |
489ee919 | 1707 | struct ieee80211_tx_info *info; |
5b548140 | 1708 | int ret = NETDEV_TX_BUSY, head_need; |
065e9605 HH |
1709 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1710 | __le16 fc; | |
e2ebc74d | 1711 | struct ieee80211_hdr hdr; |
ff67bb86 | 1712 | struct ieee80211s_hdr mesh_hdr __maybe_unused; |
0a65169b | 1713 | struct mesh_path __maybe_unused *mppath = NULL; |
e2ebc74d JB |
1714 | const u8 *encaps_data; |
1715 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1716 | int nh_pos, h_pos; |
f14543ee | 1717 | struct sta_info *sta = NULL; |
c2c98fde | 1718 | bool wme_sta = false, authorized = false, tdls_auth = false; |
941c93cd | 1719 | bool tdls_direct = false; |
a729cff8 JB |
1720 | bool multicast; |
1721 | u32 info_flags = 0; | |
1722 | u16 info_id = 0; | |
e2ebc74d | 1723 | |
e2ebc74d | 1724 | if (unlikely(skb->len < ETH_HLEN)) { |
ec634fe3 | 1725 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1726 | goto fail; |
1727 | } | |
1728 | ||
e2ebc74d JB |
1729 | /* convert Ethernet header to proper 802.11 header (based on |
1730 | * operation mode) */ | |
1731 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1732 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1733 | |
51fb61e7 | 1734 | switch (sdata->vif.type) { |
05c914fe | 1735 | case NL80211_IFTYPE_AP_VLAN: |
f14543ee | 1736 | rcu_read_lock(); |
9bc383de | 1737 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1738 | if (sta) { |
1739 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1740 | /* RA TA DA SA */ | |
1741 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1742 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1743 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1744 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1745 | hdrlen = 30; | |
c2c98fde JB |
1746 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); |
1747 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
f14543ee FF |
1748 | } |
1749 | rcu_read_unlock(); | |
1750 | if (sta) | |
1751 | break; | |
1752 | /* fall through */ | |
1753 | case NL80211_IFTYPE_AP: | |
065e9605 | 1754 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1755 | /* DA BSSID SA */ |
1756 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1757 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1758 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1759 | hdrlen = 24; | |
cf966838 | 1760 | break; |
05c914fe | 1761 | case NL80211_IFTYPE_WDS: |
065e9605 | 1762 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1763 | /* RA TA DA SA */ |
1764 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1765 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1766 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1767 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1768 | hdrlen = 30; | |
cf966838 | 1769 | break; |
33b64eb2 | 1770 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1771 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1772 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1773 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1774 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
ec634fe3 | 1775 | ret = NETDEV_TX_OK; |
e32f85f7 | 1776 | goto fail; |
33b64eb2 | 1777 | } |
28104cae | 1778 | rcu_read_lock(); |
f76b57b4 JF |
1779 | if (!is_multicast_ether_addr(skb->data)) |
1780 | mppath = mpp_path_lookup(skb->data, sdata); | |
79617dee | 1781 | |
f76b57b4 | 1782 | /* |
9d52501b JF |
1783 | * Use address extension if it is a packet from |
1784 | * another interface or if we know the destination | |
1785 | * is being proxied by a portal (i.e. portal address | |
1786 | * differs from proxied address) | |
f76b57b4 | 1787 | */ |
47846c9b | 1788 | if (compare_ether_addr(sdata->vif.addr, |
f76b57b4 | 1789 | skb->data + ETH_ALEN) == 0 && |
9d52501b | 1790 | !(mppath && compare_ether_addr(mppath->mpp, skb->data))) { |
3c5772a5 JC |
1791 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1792 | skb->data, skb->data + ETH_ALEN); | |
28104cae | 1793 | rcu_read_unlock(); |
3c5772a5 | 1794 | meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, |
61ad5394 | 1795 | sdata, NULL, NULL); |
79617dee | 1796 | } else { |
3c5772a5 | 1797 | int is_mesh_mcast = 1; |
15ff6365 | 1798 | const u8 *mesh_da; |
79617dee | 1799 | |
79617dee | 1800 | if (is_multicast_ether_addr(skb->data)) |
3c5772a5 JC |
1801 | /* DA TA mSA AE:SA */ |
1802 | mesh_da = skb->data; | |
79617dee | 1803 | else { |
15ff6365 JB |
1804 | static const u8 bcast[ETH_ALEN] = |
1805 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
3c5772a5 JC |
1806 | if (mppath) { |
1807 | /* RA TA mDA mSA AE:DA SA */ | |
1808 | mesh_da = mppath->mpp; | |
1809 | is_mesh_mcast = 0; | |
15ff6365 | 1810 | } else { |
3c5772a5 | 1811 | /* DA TA mSA AE:SA */ |
15ff6365 JB |
1812 | mesh_da = bcast; |
1813 | } | |
79617dee | 1814 | } |
3c5772a5 | 1815 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1816 | mesh_da, sdata->vif.addr); |
3c5772a5 JC |
1817 | rcu_read_unlock(); |
1818 | if (is_mesh_mcast) | |
1819 | meshhdrlen = | |
1820 | ieee80211_new_mesh_header(&mesh_hdr, | |
1821 | sdata, | |
1822 | skb->data + ETH_ALEN, | |
3c5772a5 JC |
1823 | NULL); |
1824 | else | |
1825 | meshhdrlen = | |
1826 | ieee80211_new_mesh_header(&mesh_hdr, | |
1827 | sdata, | |
3c5772a5 JC |
1828 | skb->data, |
1829 | skb->data + ETH_ALEN); | |
79617dee | 1830 | |
79617dee | 1831 | } |
33b64eb2 LCC |
1832 | break; |
1833 | #endif | |
05c914fe | 1834 | case NL80211_IFTYPE_STATION: |
941c93cd | 1835 | if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) { |
c2c98fde JB |
1836 | bool tdls_peer = false; |
1837 | ||
941c93cd AN |
1838 | rcu_read_lock(); |
1839 | sta = sta_info_get(sdata, skb->data); | |
c2c98fde JB |
1840 | if (sta) { |
1841 | authorized = test_sta_flag(sta, | |
1842 | WLAN_STA_AUTHORIZED); | |
1843 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1844 | tdls_peer = test_sta_flag(sta, | |
1845 | WLAN_STA_TDLS_PEER); | |
1846 | tdls_auth = test_sta_flag(sta, | |
1847 | WLAN_STA_TDLS_PEER_AUTH); | |
1848 | } | |
941c93cd AN |
1849 | rcu_read_unlock(); |
1850 | ||
1851 | /* | |
1852 | * If the TDLS link is enabled, send everything | |
1853 | * directly. Otherwise, allow TDLS setup frames | |
1854 | * to be transmitted indirectly. | |
1855 | */ | |
c2c98fde | 1856 | tdls_direct = tdls_peer && (tdls_auth || |
941c93cd AN |
1857 | !(ethertype == ETH_P_TDLS && skb->len > 14 && |
1858 | skb->data[14] == WLAN_TDLS_SNAP_RFTYPE)); | |
1859 | } | |
1860 | ||
1861 | if (tdls_direct) { | |
1862 | /* link during setup - throw out frames to peer */ | |
c2c98fde | 1863 | if (!tdls_auth) { |
941c93cd AN |
1864 | ret = NETDEV_TX_OK; |
1865 | goto fail; | |
1866 | } | |
1867 | ||
1868 | /* DA SA BSSID */ | |
1869 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1870 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1871 | memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN); | |
1872 | hdrlen = 24; | |
1873 | } else if (sdata->u.mgd.use_4addr && | |
1874 | cpu_to_be16(ethertype) != sdata->control_port_protocol) { | |
1875 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | | |
1876 | IEEE80211_FCTL_TODS); | |
f14543ee | 1877 | /* RA TA DA SA */ |
941c93cd | 1878 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
47846c9b | 1879 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1880 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1881 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1882 | hdrlen = 30; | |
1883 | } else { | |
1884 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1885 | /* BSSID SA DA */ | |
941c93cd | 1886 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
f14543ee FF |
1887 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
1888 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1889 | hdrlen = 24; | |
1890 | } | |
cf966838 | 1891 | break; |
05c914fe | 1892 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1893 | /* DA SA BSSID */ |
1894 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1895 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1896 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1897 | hdrlen = 24; |
cf966838 JB |
1898 | break; |
1899 | default: | |
ec634fe3 | 1900 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1901 | goto fail; |
1902 | } | |
1903 | ||
7d185b8b JB |
1904 | /* |
1905 | * There's no need to try to look up the destination | |
1906 | * if it is a multicast address (which can only happen | |
1907 | * in AP mode) | |
1908 | */ | |
a729cff8 JB |
1909 | multicast = is_multicast_ether_addr(hdr.addr1); |
1910 | if (!multicast) { | |
d0709a65 | 1911 | rcu_read_lock(); |
abe60632 | 1912 | sta = sta_info_get(sdata, hdr.addr1); |
c2c98fde JB |
1913 | if (sta) { |
1914 | authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); | |
1915 | wme_sta = test_sta_flag(sta, WLAN_STA_WME); | |
1916 | } | |
d0709a65 | 1917 | rcu_read_unlock(); |
e2ebc74d JB |
1918 | } |
1919 | ||
4777be41 JC |
1920 | /* For mesh, the use of the QoS header is mandatory */ |
1921 | if (ieee80211_vif_is_mesh(&sdata->vif)) | |
c2c98fde | 1922 | wme_sta = true; |
4777be41 | 1923 | |
3434fbd3 | 1924 | /* receiver and we are QoS enabled, use a QoS type frame */ |
c2c98fde | 1925 | if (wme_sta && local->hw.queues >= 4) { |
065e9605 | 1926 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
1927 | hdrlen += 2; |
1928 | } | |
1929 | ||
1930 | /* | |
238814fd JB |
1931 | * Drop unicast frames to unauthorised stations unless they are |
1932 | * EAPOL frames from the local station. | |
ce3edf6d | 1933 | */ |
55182e4a JB |
1934 | if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && |
1935 | !is_multicast_ether_addr(hdr.addr1) && !authorized && | |
1936 | (cpu_to_be16(ethertype) != sdata->control_port_protocol || | |
1937 | compare_ether_addr(sdata->vif.addr, skb->data + ETH_ALEN)))) { | |
ce3edf6d | 1938 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
ce3edf6d | 1939 | if (net_ratelimit()) |
0c68ae26 | 1940 | printk(KERN_DEBUG "%s: dropped frame to %pM" |
ce3edf6d | 1941 | " (unauthorized port)\n", dev->name, |
0c68ae26 | 1942 | hdr.addr1); |
ce3edf6d JB |
1943 | #endif |
1944 | ||
1945 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
1946 | ||
ec634fe3 | 1947 | ret = NETDEV_TX_OK; |
ce3edf6d JB |
1948 | goto fail; |
1949 | } | |
1950 | ||
a729cff8 JB |
1951 | if (unlikely(!multicast && skb->sk && |
1952 | skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) { | |
1953 | struct sk_buff *orig_skb = skb; | |
1954 | ||
1955 | skb = skb_clone(skb, GFP_ATOMIC); | |
1956 | if (skb) { | |
1957 | unsigned long flags; | |
1958 | int id, r; | |
1959 | ||
1960 | spin_lock_irqsave(&local->ack_status_lock, flags); | |
1961 | r = idr_get_new_above(&local->ack_status_frames, | |
1962 | orig_skb, 1, &id); | |
1963 | if (r == -EAGAIN) { | |
1964 | idr_pre_get(&local->ack_status_frames, | |
1965 | GFP_ATOMIC); | |
1966 | r = idr_get_new_above(&local->ack_status_frames, | |
1967 | orig_skb, 1, &id); | |
1968 | } | |
1969 | if (WARN_ON(!id) || id > 0xffff) { | |
1970 | idr_remove(&local->ack_status_frames, id); | |
1971 | r = -ERANGE; | |
1972 | } | |
1973 | spin_unlock_irqrestore(&local->ack_status_lock, flags); | |
1974 | ||
1975 | if (!r) { | |
1976 | info_id = id; | |
1977 | info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
1978 | } else if (skb_shared(skb)) { | |
1979 | kfree_skb(orig_skb); | |
1980 | } else { | |
1981 | kfree_skb(skb); | |
1982 | skb = orig_skb; | |
1983 | } | |
1984 | } else { | |
1985 | /* couldn't clone -- lose tx status ... */ | |
1986 | skb = orig_skb; | |
1987 | } | |
1988 | } | |
1989 | ||
7e244707 HS |
1990 | /* |
1991 | * If the skb is shared we need to obtain our own copy. | |
1992 | */ | |
1993 | if (skb_shared(skb)) { | |
a729cff8 JB |
1994 | struct sk_buff *tmp_skb = skb; |
1995 | ||
1996 | /* can't happen -- skb is a clone if info_id != 0 */ | |
1997 | WARN_ON(info_id); | |
1998 | ||
f8a0a781 | 1999 | skb = skb_clone(skb, GFP_ATOMIC); |
7e244707 HS |
2000 | kfree_skb(tmp_skb); |
2001 | ||
2002 | if (!skb) { | |
2003 | ret = NETDEV_TX_OK; | |
2004 | goto fail; | |
2005 | } | |
2006 | } | |
2007 | ||
065e9605 | 2008 | hdr.frame_control = fc; |
e2ebc74d JB |
2009 | hdr.duration_id = 0; |
2010 | hdr.seq_ctrl = 0; | |
2011 | ||
2012 | skip_header_bytes = ETH_HLEN; | |
2013 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
2014 | encaps_data = bridge_tunnel_header; | |
2015 | encaps_len = sizeof(bridge_tunnel_header); | |
2016 | skip_header_bytes -= 2; | |
2017 | } else if (ethertype >= 0x600) { | |
2018 | encaps_data = rfc1042_header; | |
2019 | encaps_len = sizeof(rfc1042_header); | |
2020 | skip_header_bytes -= 2; | |
2021 | } else { | |
2022 | encaps_data = NULL; | |
2023 | encaps_len = 0; | |
2024 | } | |
2025 | ||
7e244707 HS |
2026 | nh_pos = skb_network_header(skb) - skb->data; |
2027 | h_pos = skb_transport_header(skb) - skb->data; | |
2028 | ||
e2ebc74d JB |
2029 | skb_pull(skb, skip_header_bytes); |
2030 | nh_pos -= skip_header_bytes; | |
2031 | h_pos -= skip_header_bytes; | |
2032 | ||
23c0752a | 2033 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 2034 | |
23c0752a JB |
2035 | /* |
2036 | * So we need to modify the skb header and hence need a copy of | |
2037 | * that. The head_need variable above doesn't, so far, include | |
2038 | * the needed header space that we don't need right away. If we | |
2039 | * can, then we don't reallocate right now but only after the | |
2040 | * frame arrives at the master device (if it does...) | |
2041 | * | |
2042 | * If we cannot, however, then we will reallocate to include all | |
2043 | * the ever needed space. Also, if we need to reallocate it anyway, | |
2044 | * make it big enough for everything we may ever need. | |
2045 | */ | |
e2ebc74d | 2046 | |
3a5be7d4 | 2047 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
2048 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
2049 | head_need += local->tx_headroom; | |
2050 | head_need = max_t(int, 0, head_need); | |
3bff1865 | 2051 | if (ieee80211_skb_resize(sdata, skb, head_need, true)) |
e2ebc74d | 2052 | goto fail; |
e2ebc74d JB |
2053 | } |
2054 | ||
2055 | if (encaps_data) { | |
2056 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
2057 | nh_pos += encaps_len; | |
2058 | h_pos += encaps_len; | |
2059 | } | |
c29b9b9b | 2060 | |
e4ab7eb0 | 2061 | #ifdef CONFIG_MAC80211_MESH |
33b64eb2 LCC |
2062 | if (meshhdrlen > 0) { |
2063 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
2064 | nh_pos += meshhdrlen; | |
2065 | h_pos += meshhdrlen; | |
2066 | } | |
e4ab7eb0 | 2067 | #endif |
33b64eb2 | 2068 | |
065e9605 | 2069 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
2070 | __le16 *qos_control; |
2071 | ||
2072 | qos_control = (__le16*) skb_push(skb, 2); | |
2073 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
2074 | /* | |
2075 | * Maybe we could actually set some fields here, for now just | |
2076 | * initialise to zero to indicate no special operation. | |
2077 | */ | |
2078 | *qos_control = 0; | |
2079 | } else | |
2080 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
2081 | ||
e2ebc74d JB |
2082 | nh_pos += hdrlen; |
2083 | h_pos += hdrlen; | |
2084 | ||
68aae116 SH |
2085 | dev->stats.tx_packets++; |
2086 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
2087 | |
2088 | /* Update skb pointers to various headers since this modified frame | |
2089 | * is going to go through Linux networking code that may potentially | |
2090 | * need things like pointer to IP header. */ | |
2091 | skb_set_mac_header(skb, 0); | |
2092 | skb_set_network_header(skb, nh_pos); | |
2093 | skb_set_transport_header(skb, h_pos); | |
2094 | ||
489ee919 | 2095 | info = IEEE80211_SKB_CB(skb); |
3b8d81e0 JB |
2096 | memset(info, 0, sizeof(*info)); |
2097 | ||
e2ebc74d | 2098 | dev->trans_start = jiffies; |
a729cff8 JB |
2099 | |
2100 | info->flags = info_flags; | |
2101 | info->ack_frame_id = info_id; | |
2102 | ||
3b8d81e0 | 2103 | ieee80211_xmit(sdata, skb); |
e2ebc74d | 2104 | |
ec634fe3 | 2105 | return NETDEV_TX_OK; |
e2ebc74d JB |
2106 | |
2107 | fail: | |
ec634fe3 | 2108 | if (ret == NETDEV_TX_OK) |
e2ebc74d JB |
2109 | dev_kfree_skb(skb); |
2110 | ||
2111 | return ret; | |
2112 | } | |
2113 | ||
e2ebc74d | 2114 | |
e2530083 JB |
2115 | /* |
2116 | * ieee80211_clear_tx_pending may not be called in a context where | |
2117 | * it is possible that it packets could come in again. | |
2118 | */ | |
e2ebc74d JB |
2119 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
2120 | { | |
2de8e0d9 | 2121 | int i; |
e2ebc74d | 2122 | |
2a577d98 JB |
2123 | for (i = 0; i < local->hw.queues; i++) |
2124 | skb_queue_purge(&local->pending[i]); | |
e2ebc74d JB |
2125 | } |
2126 | ||
7bb45683 JB |
2127 | /* |
2128 | * Returns false if the frame couldn't be transmitted but was queued instead, | |
2129 | * which in this case means re-queued -- take as an indication to stop sending | |
2130 | * more pending frames. | |
2131 | */ | |
cd8ffc80 JB |
2132 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
2133 | struct sk_buff *skb) | |
2134 | { | |
2135 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
2136 | struct ieee80211_sub_if_data *sdata; | |
2137 | struct sta_info *sta; | |
2138 | struct ieee80211_hdr *hdr; | |
7bb45683 | 2139 | bool result; |
cd8ffc80 | 2140 | |
5061b0c2 | 2141 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
2142 | |
2143 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
7bb45683 | 2144 | result = ieee80211_tx(sdata, skb, true); |
cd8ffc80 | 2145 | } else { |
252b86c4 JB |
2146 | struct sk_buff_head skbs; |
2147 | ||
2148 | __skb_queue_head_init(&skbs); | |
2149 | __skb_queue_tail(&skbs, skb); | |
2150 | ||
cd8ffc80 | 2151 | hdr = (struct ieee80211_hdr *)skb->data; |
abe60632 | 2152 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 2153 | |
74e4dbfd | 2154 | result = __ieee80211_tx(local, &skbs, skb->len, sta, true); |
cd8ffc80 JB |
2155 | } |
2156 | ||
cd8ffc80 JB |
2157 | return result; |
2158 | } | |
2159 | ||
e2530083 | 2160 | /* |
3b8d81e0 | 2161 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 2162 | */ |
e2ebc74d JB |
2163 | void ieee80211_tx_pending(unsigned long data) |
2164 | { | |
2165 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
7236fe29 | 2166 | struct ieee80211_sub_if_data *sdata; |
2a577d98 | 2167 | unsigned long flags; |
cd8ffc80 | 2168 | int i; |
3b8d81e0 | 2169 | bool txok; |
e2ebc74d | 2170 | |
f0e72851 | 2171 | rcu_read_lock(); |
e2530083 | 2172 | |
3b8d81e0 | 2173 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
2174 | for (i = 0; i < local->hw.queues; i++) { |
2175 | /* | |
2176 | * If queue is stopped by something other than due to pending | |
2177 | * frames, or we have no pending frames, proceed to next queue. | |
2178 | */ | |
3b8d81e0 | 2179 | if (local->queue_stop_reasons[i] || |
2a577d98 | 2180 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 2181 | continue; |
e2530083 | 2182 | |
2a577d98 | 2183 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 2184 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 | 2185 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5061b0c2 | 2186 | |
a7bc376c JB |
2187 | if (WARN_ON(!info->control.vif)) { |
2188 | kfree_skb(skb); | |
2189 | continue; | |
2190 | } | |
2191 | ||
3b8d81e0 JB |
2192 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
2193 | flags); | |
2194 | ||
2195 | txok = ieee80211_tx_pending_skb(local, skb); | |
3b8d81e0 JB |
2196 | spin_lock_irqsave(&local->queue_stop_reason_lock, |
2197 | flags); | |
2198 | if (!txok) | |
2a577d98 | 2199 | break; |
e2ebc74d | 2200 | } |
7236fe29 JB |
2201 | |
2202 | if (skb_queue_empty(&local->pending[i])) | |
2203 | list_for_each_entry_rcu(sdata, &local->interfaces, list) | |
2337db8d | 2204 | netif_wake_subqueue(sdata->dev, i); |
e2ebc74d | 2205 | } |
3b8d81e0 | 2206 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 2207 | |
f0e72851 | 2208 | rcu_read_unlock(); |
e2ebc74d JB |
2209 | } |
2210 | ||
2211 | /* functions for drivers to get certain frames */ | |
2212 | ||
8e7be8da | 2213 | static void ieee80211_beacon_add_tim(struct ieee80211_if_ap *bss, |
5dfdaf58 JB |
2214 | struct sk_buff *skb, |
2215 | struct beacon_data *beacon) | |
e2ebc74d JB |
2216 | { |
2217 | u8 *pos, *tim; | |
2218 | int aid0 = 0; | |
2219 | int i, have_bits = 0, n1, n2; | |
2220 | ||
2221 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2222 | * mode. */ | |
e2ebc74d JB |
2223 | if (atomic_read(&bss->num_sta_ps) > 0) |
2224 | /* in the hope that this is faster than | |
2225 | * checking byte-for-byte */ | |
2226 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
2227 | IEEE80211_MAX_AID+1); | |
2228 | ||
2229 | if (bss->dtim_count == 0) | |
5dfdaf58 | 2230 | bss->dtim_count = beacon->dtim_period - 1; |
e2ebc74d JB |
2231 | else |
2232 | bss->dtim_count--; | |
2233 | ||
2234 | tim = pos = (u8 *) skb_put(skb, 6); | |
2235 | *pos++ = WLAN_EID_TIM; | |
2236 | *pos++ = 4; | |
2237 | *pos++ = bss->dtim_count; | |
5dfdaf58 | 2238 | *pos++ = beacon->dtim_period; |
e2ebc74d JB |
2239 | |
2240 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2241 | aid0 = 1; | |
2242 | ||
512119b3 CL |
2243 | bss->dtim_bc_mc = aid0 == 1; |
2244 | ||
e2ebc74d JB |
2245 | if (have_bits) { |
2246 | /* Find largest even number N1 so that bits numbered 1 through | |
2247 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2248 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2249 | n1 = 0; | |
2250 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2251 | if (bss->tim[i]) { | |
2252 | n1 = i & 0xfe; | |
2253 | break; | |
2254 | } | |
2255 | } | |
2256 | n2 = n1; | |
2257 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2258 | if (bss->tim[i]) { | |
2259 | n2 = i; | |
2260 | break; | |
2261 | } | |
2262 | } | |
2263 | ||
2264 | /* Bitmap control */ | |
2265 | *pos++ = n1 | aid0; | |
2266 | /* Part Virt Bitmap */ | |
2267 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
2268 | ||
2269 | tim[1] = n2 - n1 + 4; | |
2270 | skb_put(skb, n2 - n1); | |
2271 | } else { | |
2272 | *pos++ = aid0; /* Bitmap control */ | |
2273 | *pos++ = 0; /* Part Virt Bitmap */ | |
2274 | } | |
e2ebc74d JB |
2275 | } |
2276 | ||
eddcbb94 JB |
2277 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2278 | struct ieee80211_vif *vif, | |
2279 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2280 | { |
2281 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2282 | struct sk_buff *skb = NULL; |
e039fa4a | 2283 | struct ieee80211_tx_info *info; |
e2ebc74d JB |
2284 | struct ieee80211_sub_if_data *sdata = NULL; |
2285 | struct ieee80211_if_ap *ap = NULL; | |
5dfdaf58 | 2286 | struct beacon_data *beacon; |
8318d78a | 2287 | struct ieee80211_supported_band *sband; |
2e92e6f2 | 2288 | enum ieee80211_band band = local->hw.conf.channel->band; |
e00cfce0 | 2289 | struct ieee80211_tx_rate_control txrc; |
8318d78a | 2290 | |
2e92e6f2 | 2291 | sband = local->hw.wiphy->bands[band]; |
5dfdaf58 JB |
2292 | |
2293 | rcu_read_lock(); | |
e2ebc74d | 2294 | |
32bfd35d | 2295 | sdata = vif_to_sdata(vif); |
e2ebc74d | 2296 | |
eb3e554b FF |
2297 | if (!ieee80211_sdata_running(sdata)) |
2298 | goto out; | |
2299 | ||
eddcbb94 JB |
2300 | if (tim_offset) |
2301 | *tim_offset = 0; | |
2302 | if (tim_length) | |
2303 | *tim_length = 0; | |
2304 | ||
05c914fe | 2305 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
33b64eb2 LCC |
2306 | ap = &sdata->u.ap; |
2307 | beacon = rcu_dereference(ap->beacon); | |
3ad97fbc | 2308 | if (beacon) { |
902acc78 JB |
2309 | /* |
2310 | * headroom, head length, | |
2311 | * tail length and maximum TIM length | |
2312 | */ | |
2313 | skb = dev_alloc_skb(local->tx_headroom + | |
2314 | beacon->head_len + | |
2315 | beacon->tail_len + 256); | |
2316 | if (!skb) | |
2317 | goto out; | |
33b64eb2 | 2318 | |
902acc78 JB |
2319 | skb_reserve(skb, local->tx_headroom); |
2320 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2321 | beacon->head_len); | |
33b64eb2 | 2322 | |
d0709a65 JB |
2323 | /* |
2324 | * Not very nice, but we want to allow the driver to call | |
2325 | * ieee80211_beacon_get() as a response to the set_tim() | |
2326 | * callback. That, however, is already invoked under the | |
2327 | * sta_lock to guarantee consistent and race-free update | |
2328 | * of the tim bitmap in mac80211 and the driver. | |
2329 | */ | |
2330 | if (local->tim_in_locked_section) { | |
8e7be8da | 2331 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2332 | } else { |
2333 | unsigned long flags; | |
2334 | ||
2335 | spin_lock_irqsave(&local->sta_lock, flags); | |
8e7be8da | 2336 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2337 | spin_unlock_irqrestore(&local->sta_lock, flags); |
2338 | } | |
33b64eb2 | 2339 | |
eddcbb94 JB |
2340 | if (tim_offset) |
2341 | *tim_offset = beacon->head_len; | |
2342 | if (tim_length) | |
2343 | *tim_length = skb->len - beacon->head_len; | |
2344 | ||
902acc78 JB |
2345 | if (beacon->tail) |
2346 | memcpy(skb_put(skb, beacon->tail_len), | |
2347 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2348 | } else |
2349 | goto out; | |
05c914fe | 2350 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2351 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2352 | struct ieee80211_hdr *hdr; |
af8cdcd8 | 2353 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2354 | |
af8cdcd8 | 2355 | if (!presp) |
9d139c81 JB |
2356 | goto out; |
2357 | ||
af8cdcd8 | 2358 | skb = skb_copy(presp, GFP_ATOMIC); |
9d139c81 JB |
2359 | if (!skb) |
2360 | goto out; | |
2361 | ||
2362 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2363 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2364 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2365 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
472dbc45 JB |
2366 | struct ieee80211_mgmt *mgmt; |
2367 | u8 *pos; | |
3b69a9c5 TP |
2368 | int hdr_len = offsetof(struct ieee80211_mgmt, u.beacon) + |
2369 | sizeof(mgmt->u.beacon); | |
472dbc45 | 2370 | |
ac1bd846 JB |
2371 | #ifdef CONFIG_MAC80211_MESH |
2372 | if (!sdata->u.mesh.mesh_id_len) | |
2373 | goto out; | |
2374 | #endif | |
2375 | ||
3b69a9c5 TP |
2376 | skb = dev_alloc_skb(local->tx_headroom + |
2377 | hdr_len + | |
2378 | 2 + /* NULL SSID */ | |
2379 | 2 + 8 + /* supported rates */ | |
2380 | 2 + 3 + /* DS params */ | |
2381 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
176f3608 TP |
2382 | 2 + sizeof(struct ieee80211_ht_cap) + |
2383 | 2 + sizeof(struct ieee80211_ht_info) + | |
3b69a9c5 TP |
2384 | 2 + sdata->u.mesh.mesh_id_len + |
2385 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
2386 | sdata->u.mesh.ie_len); | |
902acc78 JB |
2387 | if (!skb) |
2388 | goto out; | |
2389 | ||
2390 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
3b69a9c5 TP |
2391 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); |
2392 | memset(mgmt, 0, hdr_len); | |
065e9605 HH |
2393 | mgmt->frame_control = |
2394 | cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); | |
902acc78 | 2395 | memset(mgmt->da, 0xff, ETH_ALEN); |
47846c9b JB |
2396 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
2397 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
902acc78 | 2398 | mgmt->u.beacon.beacon_int = |
57c4d7b4 | 2399 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); |
082ebb0c TP |
2400 | mgmt->u.beacon.capab_info |= cpu_to_le16( |
2401 | sdata->u.mesh.security ? WLAN_CAPABILITY_PRIVACY : 0); | |
902acc78 JB |
2402 | |
2403 | pos = skb_put(skb, 2); | |
2404 | *pos++ = WLAN_EID_SSID; | |
2405 | *pos++ = 0x0; | |
2406 | ||
768db343 | 2407 | if (ieee80211_add_srates_ie(&sdata->vif, skb) || |
082ebb0c | 2408 | mesh_add_ds_params_ie(skb, sdata) || |
768db343 | 2409 | ieee80211_add_ext_srates_ie(&sdata->vif, skb) || |
082ebb0c | 2410 | mesh_add_rsn_ie(skb, sdata) || |
176f3608 TP |
2411 | mesh_add_ht_cap_ie(skb, sdata) || |
2412 | mesh_add_ht_info_ie(skb, sdata) || | |
082ebb0c TP |
2413 | mesh_add_meshid_ie(skb, sdata) || |
2414 | mesh_add_meshconf_ie(skb, sdata) || | |
2415 | mesh_add_vendor_ies(skb, sdata)) { | |
2416 | pr_err("o11s: couldn't add ies!\n"); | |
2417 | goto out; | |
2418 | } | |
9d139c81 JB |
2419 | } else { |
2420 | WARN_ON(1); | |
5dfdaf58 | 2421 | goto out; |
e2ebc74d JB |
2422 | } |
2423 | ||
e039fa4a JB |
2424 | info = IEEE80211_SKB_CB(skb); |
2425 | ||
3b8d81e0 | 2426 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2427 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2428 | info->band = band; |
e00cfce0 JM |
2429 | |
2430 | memset(&txrc, 0, sizeof(txrc)); | |
2431 | txrc.hw = hw; | |
2432 | txrc.sband = sband; | |
2433 | txrc.bss_conf = &sdata->vif.bss_conf; | |
2434 | txrc.skb = skb; | |
2435 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
2436 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
2437 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
2438 | txrc.max_rate_idx = -1; | |
2439 | else | |
2440 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
8f0729b1 | 2441 | txrc.bss = true; |
e00cfce0 | 2442 | rate_control_get_rate(sdata, NULL, &txrc); |
e039fa4a JB |
2443 | |
2444 | info->control.vif = vif; | |
f591fa5d | 2445 | |
a472e71b JL |
2446 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT | |
2447 | IEEE80211_TX_CTL_ASSIGN_SEQ | | |
2448 | IEEE80211_TX_CTL_FIRST_FRAGMENT; | |
e6a9854b | 2449 | out: |
5dfdaf58 | 2450 | rcu_read_unlock(); |
e2ebc74d JB |
2451 | return skb; |
2452 | } | |
eddcbb94 | 2453 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2454 | |
02945821 AN |
2455 | struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, |
2456 | struct ieee80211_vif *vif) | |
2457 | { | |
2458 | struct ieee80211_if_ap *ap = NULL; | |
2459 | struct sk_buff *presp = NULL, *skb = NULL; | |
2460 | struct ieee80211_hdr *hdr; | |
2461 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
2462 | ||
2463 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
2464 | return NULL; | |
2465 | ||
2466 | rcu_read_lock(); | |
2467 | ||
2468 | ap = &sdata->u.ap; | |
2469 | presp = rcu_dereference(ap->probe_resp); | |
2470 | if (!presp) | |
2471 | goto out; | |
2472 | ||
2473 | skb = skb_copy(presp, GFP_ATOMIC); | |
2474 | if (!skb) | |
2475 | goto out; | |
2476 | ||
2477 | hdr = (struct ieee80211_hdr *) skb->data; | |
2478 | memset(hdr->addr1, 0, sizeof(hdr->addr1)); | |
2479 | ||
2480 | out: | |
2481 | rcu_read_unlock(); | |
2482 | return skb; | |
2483 | } | |
2484 | EXPORT_SYMBOL(ieee80211_proberesp_get); | |
2485 | ||
7044cc56 KV |
2486 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2487 | struct ieee80211_vif *vif) | |
2488 | { | |
2489 | struct ieee80211_sub_if_data *sdata; | |
2490 | struct ieee80211_if_managed *ifmgd; | |
2491 | struct ieee80211_pspoll *pspoll; | |
2492 | struct ieee80211_local *local; | |
2493 | struct sk_buff *skb; | |
2494 | ||
2495 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2496 | return NULL; | |
2497 | ||
2498 | sdata = vif_to_sdata(vif); | |
2499 | ifmgd = &sdata->u.mgd; | |
2500 | local = sdata->local; | |
2501 | ||
2502 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
d15b8459 | 2503 | if (!skb) |
7044cc56 | 2504 | return NULL; |
d15b8459 | 2505 | |
7044cc56 KV |
2506 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2507 | ||
2508 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2509 | memset(pspoll, 0, sizeof(*pspoll)); | |
2510 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2511 | IEEE80211_STYPE_PSPOLL); | |
2512 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2513 | ||
2514 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2515 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2516 | ||
2517 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2518 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2519 | ||
2520 | return skb; | |
2521 | } | |
2522 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2523 | ||
2524 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2525 | struct ieee80211_vif *vif) | |
2526 | { | |
2527 | struct ieee80211_hdr_3addr *nullfunc; | |
2528 | struct ieee80211_sub_if_data *sdata; | |
2529 | struct ieee80211_if_managed *ifmgd; | |
2530 | struct ieee80211_local *local; | |
2531 | struct sk_buff *skb; | |
2532 | ||
2533 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2534 | return NULL; | |
2535 | ||
2536 | sdata = vif_to_sdata(vif); | |
2537 | ifmgd = &sdata->u.mgd; | |
2538 | local = sdata->local; | |
2539 | ||
2540 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
d15b8459 | 2541 | if (!skb) |
7044cc56 | 2542 | return NULL; |
d15b8459 | 2543 | |
7044cc56 KV |
2544 | skb_reserve(skb, local->hw.extra_tx_headroom); |
2545 | ||
2546 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2547 | sizeof(*nullfunc)); | |
2548 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2549 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2550 | IEEE80211_STYPE_NULLFUNC | | |
2551 | IEEE80211_FCTL_TODS); | |
2552 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2553 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2554 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2555 | ||
2556 | return skb; | |
2557 | } | |
2558 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2559 | ||
05e54ea6 KV |
2560 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2561 | struct ieee80211_vif *vif, | |
2562 | const u8 *ssid, size_t ssid_len, | |
2563 | const u8 *ie, size_t ie_len) | |
2564 | { | |
2565 | struct ieee80211_sub_if_data *sdata; | |
2566 | struct ieee80211_local *local; | |
2567 | struct ieee80211_hdr_3addr *hdr; | |
2568 | struct sk_buff *skb; | |
2569 | size_t ie_ssid_len; | |
2570 | u8 *pos; | |
2571 | ||
2572 | sdata = vif_to_sdata(vif); | |
2573 | local = sdata->local; | |
2574 | ie_ssid_len = 2 + ssid_len; | |
2575 | ||
2576 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
2577 | ie_ssid_len + ie_len); | |
d15b8459 | 2578 | if (!skb) |
05e54ea6 | 2579 | return NULL; |
05e54ea6 KV |
2580 | |
2581 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2582 | ||
2583 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2584 | memset(hdr, 0, sizeof(*hdr)); | |
2585 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2586 | IEEE80211_STYPE_PROBE_REQ); | |
2587 | memset(hdr->addr1, 0xff, ETH_ALEN); | |
2588 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); | |
2589 | memset(hdr->addr3, 0xff, ETH_ALEN); | |
2590 | ||
2591 | pos = skb_put(skb, ie_ssid_len); | |
2592 | *pos++ = WLAN_EID_SSID; | |
2593 | *pos++ = ssid_len; | |
2594 | if (ssid) | |
2595 | memcpy(pos, ssid, ssid_len); | |
2596 | pos += ssid_len; | |
2597 | ||
2598 | if (ie) { | |
2599 | pos = skb_put(skb, ie_len); | |
2600 | memcpy(pos, ie, ie_len); | |
2601 | } | |
2602 | ||
2603 | return skb; | |
2604 | } | |
2605 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2606 | ||
32bfd35d | 2607 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2608 | const void *frame, size_t frame_len, |
e039fa4a | 2609 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2610 | struct ieee80211_rts *rts) |
2611 | { | |
2612 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2613 | |
065e9605 HH |
2614 | rts->frame_control = |
2615 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2616 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2617 | frame_txctl); | |
e2ebc74d JB |
2618 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2619 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2620 | } | |
2621 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2622 | ||
32bfd35d | 2623 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2624 | const void *frame, size_t frame_len, |
e039fa4a | 2625 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2626 | struct ieee80211_cts *cts) |
2627 | { | |
2628 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2629 | |
065e9605 HH |
2630 | cts->frame_control = |
2631 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2632 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2633 | frame_len, frame_txctl); | |
e2ebc74d JB |
2634 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2635 | } | |
2636 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2637 | ||
2638 | struct sk_buff * | |
32bfd35d | 2639 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2640 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2641 | { |
2642 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2643 | struct sk_buff *skb = NULL; |
5cf121c3 | 2644 | struct ieee80211_tx_data tx; |
e2ebc74d JB |
2645 | struct ieee80211_sub_if_data *sdata; |
2646 | struct ieee80211_if_ap *bss = NULL; | |
5dfdaf58 | 2647 | struct beacon_data *beacon; |
e039fa4a | 2648 | struct ieee80211_tx_info *info; |
e2ebc74d | 2649 | |
32bfd35d | 2650 | sdata = vif_to_sdata(vif); |
747cf5e9 | 2651 | bss = &sdata->u.ap; |
5dfdaf58 | 2652 | |
5dfdaf58 JB |
2653 | rcu_read_lock(); |
2654 | beacon = rcu_dereference(bss->beacon); | |
2655 | ||
05c914fe | 2656 | if (sdata->vif.type != NL80211_IFTYPE_AP || !beacon || !beacon->head) |
747cf5e9 | 2657 | goto out; |
5dfdaf58 | 2658 | |
512119b3 | 2659 | if (bss->dtim_count != 0 || !bss->dtim_bc_mc) |
747cf5e9 | 2660 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2661 | |
e2ebc74d JB |
2662 | while (1) { |
2663 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2664 | if (!skb) | |
747cf5e9 | 2665 | goto out; |
e2ebc74d JB |
2666 | local->total_ps_buffered--; |
2667 | ||
2668 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2669 | struct ieee80211_hdr *hdr = | |
2670 | (struct ieee80211_hdr *) skb->data; | |
2671 | /* more buffered multicast/broadcast frames ==> set | |
2672 | * MoreData flag in IEEE 802.11 header to inform PS | |
2673 | * STAs */ | |
2674 | hdr->frame_control |= | |
2675 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2676 | } | |
2677 | ||
3b8d81e0 | 2678 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2679 | break; |
2680 | dev_kfree_skb_any(skb); | |
2681 | } | |
e039fa4a JB |
2682 | |
2683 | info = IEEE80211_SKB_CB(skb); | |
2684 | ||
5cf121c3 JB |
2685 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
2686 | tx.channel = local->hw.conf.channel; | |
e039fa4a | 2687 | info->band = tx.channel->band; |
e2ebc74d | 2688 | |
97b045d6 | 2689 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2690 | skb = NULL; |
97b045d6 | 2691 | out: |
d0709a65 | 2692 | rcu_read_unlock(); |
e2ebc74d JB |
2693 | |
2694 | return skb; | |
2695 | } | |
2696 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2697 | |
62ae67be | 2698 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
3b8d81e0 | 2699 | { |
3b8d81e0 JB |
2700 | skb_set_mac_header(skb, 0); |
2701 | skb_set_network_header(skb, 0); | |
2702 | skb_set_transport_header(skb, 0); | |
2703 | ||
4c468fe5 AN |
2704 | /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */ |
2705 | skb_set_queue_mapping(skb, IEEE80211_AC_VO); | |
2706 | skb->priority = 7; | |
cf0277e7 | 2707 | |
3d34deb6 JB |
2708 | /* |
2709 | * The other path calling ieee80211_xmit is from the tasklet, | |
2710 | * and while we can handle concurrent transmissions locking | |
2711 | * requirements are that we do not come into tx with bhs on. | |
2712 | */ | |
2713 | local_bh_disable(); | |
3b8d81e0 | 2714 | ieee80211_xmit(sdata, skb); |
3d34deb6 | 2715 | local_bh_enable(); |
3b8d81e0 | 2716 | } |