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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> |
881d966b | 21 | #include <net/net_namespace.h> |
e2ebc74d JB |
22 | #include <net/ieee80211_radiotap.h> |
23 | #include <net/cfg80211.h> | |
24 | #include <net/mac80211.h> | |
25 | #include <asm/unaligned.h> | |
26 | ||
27 | #include "ieee80211_i.h" | |
24487981 | 28 | #include "driver-ops.h" |
2c8dccc7 | 29 | #include "led.h" |
33b64eb2 | 30 | #include "mesh.h" |
e2ebc74d JB |
31 | #include "wep.h" |
32 | #include "wpa.h" | |
33 | #include "wme.h" | |
2c8dccc7 | 34 | #include "rate.h" |
e2ebc74d JB |
35 | |
36 | #define IEEE80211_TX_OK 0 | |
37 | #define IEEE80211_TX_AGAIN 1 | |
2de8e0d9 | 38 | #define IEEE80211_TX_PENDING 2 |
e2ebc74d JB |
39 | |
40 | /* misc utils */ | |
41 | ||
03f93c3d JB |
42 | static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, int group_addr, |
43 | int next_frag_len) | |
e2ebc74d JB |
44 | { |
45 | int rate, mrate, erp, dur, i; | |
2e92e6f2 | 46 | struct ieee80211_rate *txrate; |
e2ebc74d | 47 | struct ieee80211_local *local = tx->local; |
8318d78a | 48 | struct ieee80211_supported_band *sband; |
358c8d9d | 49 | struct ieee80211_hdr *hdr; |
e6a9854b JB |
50 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
51 | ||
52 | /* assume HW handles this */ | |
53 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS) | |
54 | return 0; | |
55 | ||
56 | /* uh huh? */ | |
57 | if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) | |
58 | return 0; | |
e2ebc74d | 59 | |
2e92e6f2 | 60 | sband = local->hw.wiphy->bands[tx->channel->band]; |
e6a9854b | 61 | txrate = &sband->bitrates[info->control.rates[0].idx]; |
8318d78a | 62 | |
e6a9854b | 63 | erp = txrate->flags & IEEE80211_RATE_ERP_G; |
e2ebc74d JB |
64 | |
65 | /* | |
66 | * data and mgmt (except PS Poll): | |
67 | * - during CFP: 32768 | |
68 | * - during contention period: | |
69 | * if addr1 is group address: 0 | |
70 | * if more fragments = 0 and addr1 is individual address: time to | |
71 | * transmit one ACK plus SIFS | |
72 | * if more fragments = 1 and addr1 is individual address: time to | |
73 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
74 | * | |
75 | * IEEE 802.11, 9.6: | |
76 | * - control response frame (CTS or ACK) shall be transmitted using the | |
77 | * same rate as the immediately previous frame in the frame exchange | |
78 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
79 | * at the highest possible rate belonging to the PHY rates in the | |
80 | * BSSBasicRateSet | |
81 | */ | |
358c8d9d HH |
82 | hdr = (struct ieee80211_hdr *)tx->skb->data; |
83 | if (ieee80211_is_ctl(hdr->frame_control)) { | |
e2ebc74d | 84 | /* TODO: These control frames are not currently sent by |
ccd7b362 | 85 | * mac80211, but should they be implemented, this function |
e2ebc74d JB |
86 | * needs to be updated to support duration field calculation. |
87 | * | |
88 | * RTS: time needed to transmit pending data/mgmt frame plus | |
89 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
90 | * CTS: duration of immediately previous RTS minus time | |
91 | * required to transmit CTS and its SIFS | |
92 | * ACK: 0 if immediately previous directed data/mgmt had | |
93 | * more=0, with more=1 duration in ACK frame is duration | |
94 | * from previous frame minus time needed to transmit ACK | |
95 | * and its SIFS | |
96 | * PS Poll: BIT(15) | BIT(14) | aid | |
97 | */ | |
98 | return 0; | |
99 | } | |
100 | ||
101 | /* data/mgmt */ | |
102 | if (0 /* FIX: data/mgmt during CFP */) | |
03f93c3d | 103 | return cpu_to_le16(32768); |
e2ebc74d JB |
104 | |
105 | if (group_addr) /* Group address as the destination - no ACK */ | |
106 | return 0; | |
107 | ||
108 | /* Individual destination address: | |
109 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
110 | * CTS and ACK frames shall be transmitted using the highest rate in | |
111 | * basic rate set that is less than or equal to the rate of the | |
112 | * immediately previous frame and that is using the same modulation | |
113 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
114 | * the highest mandatory rate of the PHY that is less than or equal to | |
115 | * the rate of the previous frame is used. | |
116 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
117 | */ | |
118 | rate = -1; | |
8318d78a JB |
119 | /* use lowest available if everything fails */ |
120 | mrate = sband->bitrates[0].bitrate; | |
121 | for (i = 0; i < sband->n_bitrates; i++) { | |
122 | struct ieee80211_rate *r = &sband->bitrates[i]; | |
e2ebc74d | 123 | |
8318d78a JB |
124 | if (r->bitrate > txrate->bitrate) |
125 | break; | |
e2ebc74d | 126 | |
bda3933a | 127 | if (tx->sdata->vif.bss_conf.basic_rates & BIT(i)) |
8318d78a JB |
128 | rate = r->bitrate; |
129 | ||
130 | switch (sband->band) { | |
131 | case IEEE80211_BAND_2GHZ: { | |
132 | u32 flag; | |
133 | if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) | |
134 | flag = IEEE80211_RATE_MANDATORY_G; | |
135 | else | |
136 | flag = IEEE80211_RATE_MANDATORY_B; | |
137 | if (r->flags & flag) | |
138 | mrate = r->bitrate; | |
139 | break; | |
140 | } | |
141 | case IEEE80211_BAND_5GHZ: | |
142 | if (r->flags & IEEE80211_RATE_MANDATORY_A) | |
143 | mrate = r->bitrate; | |
144 | break; | |
145 | case IEEE80211_NUM_BANDS: | |
146 | WARN_ON(1); | |
147 | break; | |
148 | } | |
e2ebc74d JB |
149 | } |
150 | if (rate == -1) { | |
151 | /* No matching basic rate found; use highest suitable mandatory | |
152 | * PHY rate */ | |
153 | rate = mrate; | |
154 | } | |
155 | ||
156 | /* Time needed to transmit ACK | |
157 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
158 | * to closest integer */ | |
159 | ||
160 | dur = ieee80211_frame_duration(local, 10, rate, erp, | |
bda3933a | 161 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
162 | |
163 | if (next_frag_len) { | |
164 | /* Frame is fragmented: duration increases with time needed to | |
165 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
166 | dur *= 2; /* ACK + SIFS */ | |
167 | /* next fragment */ | |
168 | dur += ieee80211_frame_duration(local, next_frag_len, | |
8318d78a | 169 | txrate->bitrate, erp, |
bda3933a | 170 | tx->sdata->vif.bss_conf.use_short_preamble); |
e2ebc74d JB |
171 | } |
172 | ||
03f93c3d | 173 | return cpu_to_le16(dur); |
e2ebc74d JB |
174 | } |
175 | ||
133b8226 JB |
176 | static int inline is_ieee80211_device(struct ieee80211_local *local, |
177 | struct net_device *dev) | |
e2ebc74d | 178 | { |
133b8226 | 179 | return local == wdev_priv(dev->ieee80211_ptr); |
e2ebc74d JB |
180 | } |
181 | ||
182 | /* tx handlers */ | |
5c1b98a5 KV |
183 | static ieee80211_tx_result debug_noinline |
184 | ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx) | |
185 | { | |
186 | struct ieee80211_local *local = tx->local; | |
187 | ||
188 | /* driver doesn't support power save */ | |
189 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) | |
190 | return TX_CONTINUE; | |
191 | ||
192 | /* hardware does dynamic power save */ | |
193 | if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) | |
194 | return TX_CONTINUE; | |
195 | ||
196 | /* dynamic power save disabled */ | |
197 | if (local->hw.conf.dynamic_ps_timeout <= 0) | |
198 | return TX_CONTINUE; | |
199 | ||
200 | /* we are scanning, don't enable power save */ | |
201 | if (local->scanning) | |
202 | return TX_CONTINUE; | |
203 | ||
204 | if (!local->ps_sdata) | |
205 | return TX_CONTINUE; | |
206 | ||
207 | /* No point if we're going to suspend */ | |
208 | if (local->quiescing) | |
209 | return TX_CONTINUE; | |
210 | ||
211 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
212 | ieee80211_stop_queues_by_reason(&local->hw, | |
213 | IEEE80211_QUEUE_STOP_REASON_PS); | |
214 | ieee80211_queue_work(&local->hw, | |
215 | &local->dynamic_ps_disable_work); | |
216 | } | |
217 | ||
218 | mod_timer(&local->dynamic_ps_timer, jiffies + | |
219 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
220 | ||
221 | return TX_CONTINUE; | |
222 | } | |
e2ebc74d | 223 | |
d9e8a70f | 224 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 225 | ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx) |
e2ebc74d | 226 | { |
358c8d9d | 227 | |
e039fa4a | 228 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 229 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e2ebc74d JB |
230 | u32 sta_flags; |
231 | ||
e039fa4a | 232 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) |
9ae54c84 | 233 | return TX_CONTINUE; |
58d4185e | 234 | |
142b9f50 | 235 | if (unlikely(test_bit(SCAN_OFF_CHANNEL, &tx->local->scanning)) && |
a9a6ffff KV |
236 | !ieee80211_is_probe_req(hdr->frame_control) && |
237 | !ieee80211_is_nullfunc(hdr->frame_control)) | |
238 | /* | |
239 | * When software scanning only nullfunc frames (to notify | |
240 | * the sleep state to the AP) and probe requests (for the | |
241 | * active scan) are allowed, all other frames should not be | |
242 | * sent and we should not get here, but if we do | |
243 | * nonetheless, drop them to avoid sending them | |
244 | * off-channel. See the link below and | |
245 | * ieee80211_start_scan() for more. | |
246 | * | |
247 | * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089 | |
248 | */ | |
9ae54c84 | 249 | return TX_DROP; |
e2ebc74d | 250 | |
05c914fe | 251 | if (tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
33b64eb2 LCC |
252 | return TX_CONTINUE; |
253 | ||
5cf121c3 | 254 | if (tx->flags & IEEE80211_TX_PS_BUFFERED) |
9ae54c84 | 255 | return TX_CONTINUE; |
e2ebc74d | 256 | |
07346f81 | 257 | sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; |
e2ebc74d | 258 | |
5cf121c3 | 259 | if (likely(tx->flags & IEEE80211_TX_UNICAST)) { |
e2ebc74d | 260 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && |
05c914fe | 261 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
358c8d9d | 262 | ieee80211_is_data(hdr->frame_control))) { |
e2ebc74d JB |
263 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
264 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
0c68ae26 | 265 | "associated station %pM\n", |
47846c9b | 266 | tx->sdata->name, hdr->addr1); |
e2ebc74d JB |
267 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
268 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
9ae54c84 | 269 | return TX_DROP; |
e2ebc74d JB |
270 | } |
271 | } else { | |
358c8d9d | 272 | if (unlikely(ieee80211_is_data(hdr->frame_control) && |
e2ebc74d | 273 | tx->local->num_sta == 0 && |
05c914fe | 274 | tx->sdata->vif.type != NL80211_IFTYPE_ADHOC)) { |
e2ebc74d JB |
275 | /* |
276 | * No associated STAs - no need to send multicast | |
277 | * frames. | |
278 | */ | |
9ae54c84 | 279 | return TX_DROP; |
e2ebc74d | 280 | } |
9ae54c84 | 281 | return TX_CONTINUE; |
e2ebc74d JB |
282 | } |
283 | ||
9ae54c84 | 284 | return TX_CONTINUE; |
e2ebc74d JB |
285 | } |
286 | ||
e2ebc74d JB |
287 | /* This function is called whenever the AP is about to exceed the maximum limit |
288 | * of buffered frames for power saving STAs. This situation should not really | |
289 | * happen often during normal operation, so dropping the oldest buffered packet | |
290 | * from each queue should be OK to make some room for new frames. */ | |
291 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
292 | { | |
293 | int total = 0, purged = 0; | |
294 | struct sk_buff *skb; | |
295 | struct ieee80211_sub_if_data *sdata; | |
296 | struct sta_info *sta; | |
297 | ||
79010420 JB |
298 | /* |
299 | * virtual interfaces are protected by RCU | |
300 | */ | |
301 | rcu_read_lock(); | |
302 | ||
303 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
e2ebc74d | 304 | struct ieee80211_if_ap *ap; |
05c914fe | 305 | if (sdata->vif.type != NL80211_IFTYPE_AP) |
e2ebc74d JB |
306 | continue; |
307 | ap = &sdata->u.ap; | |
308 | skb = skb_dequeue(&ap->ps_bc_buf); | |
309 | if (skb) { | |
310 | purged++; | |
311 | dev_kfree_skb(skb); | |
312 | } | |
313 | total += skb_queue_len(&ap->ps_bc_buf); | |
314 | } | |
e2ebc74d | 315 | |
d0709a65 | 316 | list_for_each_entry_rcu(sta, &local->sta_list, list) { |
e2ebc74d JB |
317 | skb = skb_dequeue(&sta->ps_tx_buf); |
318 | if (skb) { | |
319 | purged++; | |
320 | dev_kfree_skb(skb); | |
321 | } | |
322 | total += skb_queue_len(&sta->ps_tx_buf); | |
323 | } | |
d0709a65 JB |
324 | |
325 | rcu_read_unlock(); | |
e2ebc74d JB |
326 | |
327 | local->total_ps_buffered = total; | |
54223995 | 328 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
e2ebc74d | 329 | printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n", |
dd1cd4c6 | 330 | wiphy_name(local->hw.wiphy), purged); |
f4ea83dd | 331 | #endif |
e2ebc74d JB |
332 | } |
333 | ||
9ae54c84 | 334 | static ieee80211_tx_result |
5cf121c3 | 335 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 336 | { |
e039fa4a | 337 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 338 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
e039fa4a | 339 | |
7d54d0dd JB |
340 | /* |
341 | * broadcast/multicast frame | |
342 | * | |
343 | * If any of the associated stations is in power save mode, | |
344 | * the frame is buffered to be sent after DTIM beacon frame. | |
345 | * This is done either by the hardware or us. | |
346 | */ | |
347 | ||
3e122be0 JB |
348 | /* powersaving STAs only in AP/VLAN mode */ |
349 | if (!tx->sdata->bss) | |
350 | return TX_CONTINUE; | |
351 | ||
352 | /* no buffering for ordered frames */ | |
358c8d9d | 353 | if (ieee80211_has_order(hdr->frame_control)) |
9ae54c84 | 354 | return TX_CONTINUE; |
7d54d0dd JB |
355 | |
356 | /* no stations in PS mode */ | |
357 | if (!atomic_read(&tx->sdata->bss->num_sta_ps)) | |
9ae54c84 | 358 | return TX_CONTINUE; |
7d54d0dd | 359 | |
62b517cb | 360 | info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM; |
62b1208e | 361 | |
62b517cb JB |
362 | /* device releases frame after DTIM beacon */ |
363 | if (!(tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)) | |
62b1208e | 364 | return TX_CONTINUE; |
62b1208e | 365 | |
7d54d0dd | 366 | /* buffered in mac80211 */ |
62b1208e JB |
367 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
368 | purge_old_ps_buffers(tx->local); | |
369 | ||
370 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= AP_MAX_BC_BUFFER) { | |
54223995 | 371 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
62b1208e JB |
372 | if (net_ratelimit()) |
373 | printk(KERN_DEBUG "%s: BC TX buffer full - dropping the oldest frame\n", | |
47846c9b | 374 | tx->sdata->name); |
f4ea83dd | 375 | #endif |
62b1208e JB |
376 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); |
377 | } else | |
378 | tx->local->total_ps_buffered++; | |
e2ebc74d | 379 | |
62b1208e | 380 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); |
7d54d0dd | 381 | |
62b1208e | 382 | return TX_QUEUED; |
e2ebc74d JB |
383 | } |
384 | ||
fb733336 JM |
385 | static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta, |
386 | struct sk_buff *skb) | |
387 | { | |
388 | if (!ieee80211_is_mgmt(fc)) | |
389 | return 0; | |
390 | ||
391 | if (sta == NULL || !test_sta_flags(sta, WLAN_STA_MFP)) | |
392 | return 0; | |
393 | ||
394 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) | |
395 | skb->data)) | |
396 | return 0; | |
397 | ||
398 | return 1; | |
399 | } | |
400 | ||
9ae54c84 | 401 | static ieee80211_tx_result |
5cf121c3 | 402 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d JB |
403 | { |
404 | struct sta_info *sta = tx->sta; | |
e039fa4a | 405 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 406 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
07346f81 | 407 | u32 staflags; |
e2ebc74d | 408 | |
f64f9e71 JP |
409 | if (unlikely(!sta || |
410 | ieee80211_is_probe_resp(hdr->frame_control) || | |
411 | ieee80211_is_auth(hdr->frame_control) || | |
412 | ieee80211_is_assoc_resp(hdr->frame_control) || | |
413 | ieee80211_is_reassoc_resp(hdr->frame_control))) | |
9ae54c84 | 414 | return TX_CONTINUE; |
e2ebc74d | 415 | |
07346f81 JB |
416 | staflags = get_sta_flags(sta); |
417 | ||
af818581 | 418 | if (unlikely((staflags & (WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) && |
3fa52056 | 419 | !(info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE))) { |
e2ebc74d | 420 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
0c68ae26 | 421 | printk(KERN_DEBUG "STA %pM aid %d: PS buffer (entries " |
e2ebc74d | 422 | "before %d)\n", |
0c68ae26 | 423 | sta->sta.addr, sta->sta.aid, |
e2ebc74d JB |
424 | skb_queue_len(&sta->ps_tx_buf)); |
425 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d JB |
426 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
427 | purge_old_ps_buffers(tx->local); | |
428 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { | |
429 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); | |
54223995 | 430 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
e2ebc74d | 431 | if (net_ratelimit()) { |
0c68ae26 | 432 | printk(KERN_DEBUG "%s: STA %pM TX " |
e2ebc74d | 433 | "buffer full - dropping oldest frame\n", |
47846c9b | 434 | tx->sdata->name, sta->sta.addr); |
e2ebc74d | 435 | } |
f4ea83dd | 436 | #endif |
e2ebc74d JB |
437 | dev_kfree_skb(old); |
438 | } else | |
439 | tx->local->total_ps_buffered++; | |
004c872e | 440 | |
af818581 JB |
441 | /* |
442 | * Queue frame to be sent after STA wakes up/polls, | |
443 | * but don't set the TIM bit if the driver is blocking | |
444 | * wakeup or poll response transmissions anyway. | |
445 | */ | |
446 | if (skb_queue_empty(&sta->ps_tx_buf) && | |
447 | !(staflags & WLAN_STA_PS_DRIVER)) | |
004c872e JB |
448 | sta_info_set_tim_bit(sta); |
449 | ||
e039fa4a | 450 | info->control.jiffies = jiffies; |
5061b0c2 | 451 | info->control.vif = &tx->sdata->vif; |
8f77f384 | 452 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
e2ebc74d | 453 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); |
9ae54c84 | 454 | return TX_QUEUED; |
e2ebc74d JB |
455 | } |
456 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
af818581 | 457 | else if (unlikely(staflags & WLAN_STA_PS_STA)) { |
0c68ae26 | 458 | printk(KERN_DEBUG "%s: STA %pM in PS mode, but pspoll " |
47846c9b | 459 | "set -> send frame\n", tx->sdata->name, |
0c68ae26 | 460 | sta->sta.addr); |
e2ebc74d JB |
461 | } |
462 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
e2ebc74d | 463 | |
9ae54c84 | 464 | return TX_CONTINUE; |
e2ebc74d JB |
465 | } |
466 | ||
d9e8a70f | 467 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 468 | ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx) |
e2ebc74d | 469 | { |
5cf121c3 | 470 | if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED)) |
9ae54c84 | 471 | return TX_CONTINUE; |
e2ebc74d | 472 | |
5cf121c3 | 473 | if (tx->flags & IEEE80211_TX_UNICAST) |
e2ebc74d JB |
474 | return ieee80211_tx_h_unicast_ps_buf(tx); |
475 | else | |
476 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
477 | } | |
478 | ||
d9e8a70f | 479 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 480 | ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) |
e2ebc74d | 481 | { |
d3feaf5a | 482 | struct ieee80211_key *key = NULL; |
e039fa4a | 483 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
358c8d9d | 484 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
d4e46a3d | 485 | |
3b8d81e0 | 486 | if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) |
e2ebc74d | 487 | tx->key = NULL; |
d4e46a3d JB |
488 | else if (tx->sta && (key = rcu_dereference(tx->sta->key))) |
489 | tx->key = key; | |
3cfcf6ac JM |
490 | else if (ieee80211_is_mgmt(hdr->frame_control) && |
491 | (key = rcu_dereference(tx->sdata->default_mgmt_key))) | |
492 | tx->key = key; | |
d4e46a3d JB |
493 | else if ((key = rcu_dereference(tx->sdata->default_key))) |
494 | tx->key = key; | |
e2ebc74d | 495 | else if (tx->sdata->drop_unencrypted && |
d0f09804 | 496 | (tx->skb->protocol != cpu_to_be16(ETH_P_PAE)) && |
e0463f50 JM |
497 | !(info->flags & IEEE80211_TX_CTL_INJECTED) && |
498 | (!ieee80211_is_robust_mgmt_frame(hdr) || | |
499 | (ieee80211_is_action(hdr->frame_control) && | |
500 | tx->sta && test_sta_flags(tx->sta, WLAN_STA_MFP)))) { | |
e2ebc74d | 501 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
9ae54c84 | 502 | return TX_DROP; |
176e4f84 | 503 | } else |
e2ebc74d JB |
504 | tx->key = NULL; |
505 | ||
506 | if (tx->key) { | |
507 | tx->key->tx_rx_count++; | |
011bfcc4 | 508 | /* TODO: add threshold stuff again */ |
176e4f84 JB |
509 | |
510 | switch (tx->key->conf.alg) { | |
511 | case ALG_WEP: | |
358c8d9d | 512 | if (ieee80211_is_auth(hdr->frame_control)) |
176e4f84 JB |
513 | break; |
514 | case ALG_TKIP: | |
358c8d9d | 515 | if (!ieee80211_is_data_present(hdr->frame_control)) |
176e4f84 JB |
516 | tx->key = NULL; |
517 | break; | |
fb733336 JM |
518 | case ALG_CCMP: |
519 | if (!ieee80211_is_data_present(hdr->frame_control) && | |
520 | !ieee80211_use_mfp(hdr->frame_control, tx->sta, | |
521 | tx->skb)) | |
522 | tx->key = NULL; | |
523 | break; | |
3cfcf6ac JM |
524 | case ALG_AES_CMAC: |
525 | if (!ieee80211_is_mgmt(hdr->frame_control)) | |
526 | tx->key = NULL; | |
527 | break; | |
176e4f84 | 528 | } |
e2ebc74d JB |
529 | } |
530 | ||
176e4f84 | 531 | if (!tx->key || !(tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) |
3b8d81e0 | 532 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
176e4f84 | 533 | |
9ae54c84 | 534 | return TX_CONTINUE; |
e2ebc74d JB |
535 | } |
536 | ||
d9e8a70f | 537 | static ieee80211_tx_result debug_noinline |
5cf121c3 | 538 | ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) |
e2ebc74d | 539 | { |
e039fa4a | 540 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); |
e6a9854b JB |
541 | struct ieee80211_hdr *hdr = (void *)tx->skb->data; |
542 | struct ieee80211_supported_band *sband; | |
543 | struct ieee80211_rate *rate; | |
544 | int i, len; | |
545 | bool inval = false, rts = false, short_preamble = false; | |
546 | struct ieee80211_tx_rate_control txrc; | |
b770b43e | 547 | u32 sta_flags; |
8318d78a | 548 | |
e6a9854b | 549 | memset(&txrc, 0, sizeof(txrc)); |
e2ebc74d | 550 | |
e6a9854b | 551 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
58d4185e | 552 | |
e6a9854b | 553 | len = min_t(int, tx->skb->len + FCS_LEN, |
b9a5f8ca | 554 | tx->local->hw.wiphy->frag_threshold); |
e6a9854b JB |
555 | |
556 | /* set up the tx rate control struct we give the RC algo */ | |
557 | txrc.hw = local_to_hw(tx->local); | |
558 | txrc.sband = sband; | |
559 | txrc.bss_conf = &tx->sdata->vif.bss_conf; | |
560 | txrc.skb = tx->skb; | |
561 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
562 | txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[tx->channel->band]; |
563 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
564 | txrc.max_rate_idx = -1; | |
565 | else | |
566 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
e00cfce0 | 567 | txrc.ap = tx->sdata->vif.type == NL80211_IFTYPE_AP; |
e6a9854b JB |
568 | |
569 | /* set up RTS protection if desired */ | |
b9a5f8ca | 570 | if (len > tx->local->hw.wiphy->rts_threshold) { |
e6a9854b | 571 | txrc.rts = rts = true; |
e2ebc74d | 572 | } |
e2ebc74d | 573 | |
e6a9854b JB |
574 | /* |
575 | * Use short preamble if the BSS can handle it, but not for | |
576 | * management frames unless we know the receiver can handle | |
577 | * that -- the management frame might be to a station that | |
578 | * just wants a probe response. | |
579 | */ | |
580 | if (tx->sdata->vif.bss_conf.use_short_preamble && | |
581 | (ieee80211_is_data(hdr->frame_control) || | |
582 | (tx->sta && test_sta_flags(tx->sta, WLAN_STA_SHORT_PREAMBLE)))) | |
583 | txrc.short_preamble = short_preamble = true; | |
e2ebc74d | 584 | |
b770b43e LR |
585 | sta_flags = tx->sta ? get_sta_flags(tx->sta) : 0; |
586 | ||
587 | /* | |
588 | * Lets not bother rate control if we're associated and cannot | |
589 | * talk to the sta. This should not happen. | |
590 | */ | |
fbe9c429 | 591 | if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && |
b770b43e LR |
592 | (sta_flags & WLAN_STA_ASSOC) && |
593 | !rate_usable_index_exists(sband, &tx->sta->sta), | |
594 | "%s: Dropped data frame as no usable bitrate found while " | |
595 | "scanning and associated. Target station: " | |
596 | "%pM on %d GHz band\n", | |
47846c9b | 597 | tx->sdata->name, hdr->addr1, |
b770b43e LR |
598 | tx->channel->band ? 5 : 2)) |
599 | return TX_DROP; | |
2e92e6f2 | 600 | |
b770b43e LR |
601 | /* |
602 | * If we're associated with the sta at this point we know we can at | |
603 | * least send the frame at the lowest bit rate. | |
604 | */ | |
e6a9854b JB |
605 | rate_control_get_rate(tx->sdata, tx->sta, &txrc); |
606 | ||
607 | if (unlikely(info->control.rates[0].idx < 0)) | |
608 | return TX_DROP; | |
609 | ||
610 | if (txrc.reported_rate.idx < 0) | |
611 | txrc.reported_rate = info->control.rates[0]; | |
e2ebc74d | 612 | |
e039fa4a | 613 | if (tx->sta) |
e6a9854b | 614 | tx->sta->last_tx_rate = txrc.reported_rate; |
e039fa4a | 615 | |
e6a9854b JB |
616 | if (unlikely(!info->control.rates[0].count)) |
617 | info->control.rates[0].count = 1; | |
e2ebc74d | 618 | |
9955151d GS |
619 | if (WARN_ON_ONCE((info->control.rates[0].count > 1) && |
620 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) | |
621 | info->control.rates[0].count = 1; | |
622 | ||
e6a9854b JB |
623 | if (is_multicast_ether_addr(hdr->addr1)) { |
624 | /* | |
625 | * XXX: verify the rate is in the basic rateset | |
626 | */ | |
627 | return TX_CONTINUE; | |
e2ebc74d JB |
628 | } |
629 | ||
e6a9854b JB |
630 | /* |
631 | * set up the RTS/CTS rate as the fastest basic rate | |
632 | * that is not faster than the data rate | |
633 | * | |
634 | * XXX: Should this check all retry rates? | |
635 | */ | |
636 | if (!(info->control.rates[0].flags & IEEE80211_TX_RC_MCS)) { | |
637 | s8 baserate = 0; | |
638 | ||
639 | rate = &sband->bitrates[info->control.rates[0].idx]; | |
640 | ||
641 | for (i = 0; i < sband->n_bitrates; i++) { | |
642 | /* must be a basic rate */ | |
643 | if (!(tx->sdata->vif.bss_conf.basic_rates & BIT(i))) | |
644 | continue; | |
645 | /* must not be faster than the data rate */ | |
646 | if (sband->bitrates[i].bitrate > rate->bitrate) | |
647 | continue; | |
648 | /* maximum */ | |
649 | if (sband->bitrates[baserate].bitrate < | |
650 | sband->bitrates[i].bitrate) | |
651 | baserate = i; | |
652 | } | |
653 | ||
654 | info->control.rts_cts_rate_idx = baserate; | |
7e9ed188 DD |
655 | } |
656 | ||
e6a9854b JB |
657 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) { |
658 | /* | |
659 | * make sure there's no valid rate following | |
660 | * an invalid one, just in case drivers don't | |
661 | * take the API seriously to stop at -1. | |
662 | */ | |
663 | if (inval) { | |
664 | info->control.rates[i].idx = -1; | |
665 | continue; | |
666 | } | |
667 | if (info->control.rates[i].idx < 0) { | |
668 | inval = true; | |
669 | continue; | |
670 | } | |
8318d78a | 671 | |
e6a9854b JB |
672 | /* |
673 | * For now assume MCS is already set up correctly, this | |
674 | * needs to be fixed. | |
675 | */ | |
676 | if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) { | |
677 | WARN_ON(info->control.rates[i].idx > 76); | |
678 | continue; | |
679 | } | |
e2ebc74d | 680 | |
e6a9854b JB |
681 | /* set up RTS protection if desired */ |
682 | if (rts) | |
683 | info->control.rates[i].flags |= | |
684 | IEEE80211_TX_RC_USE_RTS_CTS; | |
8318d78a | 685 | |
e6a9854b | 686 | /* RC is busted */ |
075cbc9e S |
687 | if (WARN_ON_ONCE(info->control.rates[i].idx >= |
688 | sband->n_bitrates)) { | |
e6a9854b JB |
689 | info->control.rates[i].idx = -1; |
690 | continue; | |
8318d78a | 691 | } |
e2ebc74d | 692 | |
e6a9854b JB |
693 | rate = &sband->bitrates[info->control.rates[i].idx]; |
694 | ||
695 | /* set up short preamble */ | |
696 | if (short_preamble && | |
697 | rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) | |
698 | info->control.rates[i].flags |= | |
699 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE; | |
700 | ||
701 | /* set up G protection */ | |
702 | if (!rts && tx->sdata->vif.bss_conf.use_cts_prot && | |
703 | rate->flags & IEEE80211_RATE_ERP_G) | |
704 | info->control.rates[i].flags |= | |
705 | IEEE80211_TX_RC_USE_CTS_PROTECT; | |
e2ebc74d JB |
706 | } |
707 | ||
e6a9854b JB |
708 | return TX_CONTINUE; |
709 | } | |
710 | ||
711 | static ieee80211_tx_result debug_noinline | |
712 | ieee80211_tx_h_misc(struct ieee80211_tx_data *tx) | |
713 | { | |
714 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
715 | ||
e2454948 | 716 | if (tx->sta) |
17741cdc | 717 | info->control.sta = &tx->sta->sta; |
e2454948 JB |
718 | |
719 | return TX_CONTINUE; | |
720 | } | |
721 | ||
f591fa5d JB |
722 | static ieee80211_tx_result debug_noinline |
723 | ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx) | |
724 | { | |
725 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb); | |
726 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
727 | u16 *seq; | |
728 | u8 *qc; | |
729 | int tid; | |
730 | ||
25d834e1 JB |
731 | /* |
732 | * Packet injection may want to control the sequence | |
733 | * number, if we have no matching interface then we | |
734 | * neither assign one ourselves nor ask the driver to. | |
735 | */ | |
5061b0c2 | 736 | if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR)) |
25d834e1 JB |
737 | return TX_CONTINUE; |
738 | ||
f591fa5d JB |
739 | if (unlikely(ieee80211_is_ctl(hdr->frame_control))) |
740 | return TX_CONTINUE; | |
741 | ||
742 | if (ieee80211_hdrlen(hdr->frame_control) < 24) | |
743 | return TX_CONTINUE; | |
744 | ||
94778280 JB |
745 | /* |
746 | * Anything but QoS data that has a sequence number field | |
747 | * (is long enough) gets a sequence number from the global | |
748 | * counter. | |
749 | */ | |
f591fa5d | 750 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
94778280 | 751 | /* driver should assign sequence number */ |
f591fa5d | 752 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; |
94778280 JB |
753 | /* for pure STA mode without beacons, we can do it */ |
754 | hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number); | |
755 | tx->sdata->sequence_number += 0x10; | |
f591fa5d JB |
756 | return TX_CONTINUE; |
757 | } | |
758 | ||
759 | /* | |
760 | * This should be true for injected/management frames only, for | |
761 | * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ | |
762 | * above since they are not QoS-data frames. | |
763 | */ | |
764 | if (!tx->sta) | |
765 | return TX_CONTINUE; | |
766 | ||
767 | /* include per-STA, per-TID sequence counter */ | |
768 | ||
769 | qc = ieee80211_get_qos_ctl(hdr); | |
770 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
771 | seq = &tx->sta->tid_seq[tid]; | |
772 | ||
773 | hdr->seq_ctrl = cpu_to_le16(*seq); | |
774 | ||
775 | /* Increase the sequence number. */ | |
776 | *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ; | |
777 | ||
778 | return TX_CONTINUE; | |
779 | } | |
780 | ||
2de8e0d9 JB |
781 | static int ieee80211_fragment(struct ieee80211_local *local, |
782 | struct sk_buff *skb, int hdrlen, | |
783 | int frag_threshold) | |
784 | { | |
785 | struct sk_buff *tail = skb, *tmp; | |
786 | int per_fragm = frag_threshold - hdrlen - FCS_LEN; | |
787 | int pos = hdrlen + per_fragm; | |
788 | int rem = skb->len - hdrlen - per_fragm; | |
789 | ||
790 | if (WARN_ON(rem < 0)) | |
791 | return -EINVAL; | |
792 | ||
793 | while (rem) { | |
794 | int fraglen = per_fragm; | |
795 | ||
796 | if (fraglen > rem) | |
797 | fraglen = rem; | |
798 | rem -= fraglen; | |
799 | tmp = dev_alloc_skb(local->tx_headroom + | |
800 | frag_threshold + | |
801 | IEEE80211_ENCRYPT_HEADROOM + | |
802 | IEEE80211_ENCRYPT_TAILROOM); | |
803 | if (!tmp) | |
804 | return -ENOMEM; | |
805 | tail->next = tmp; | |
806 | tail = tmp; | |
807 | skb_reserve(tmp, local->tx_headroom + | |
808 | IEEE80211_ENCRYPT_HEADROOM); | |
809 | /* copy control information */ | |
810 | memcpy(tmp->cb, skb->cb, sizeof(tmp->cb)); | |
811 | skb_copy_queue_mapping(tmp, skb); | |
812 | tmp->priority = skb->priority; | |
2de8e0d9 | 813 | tmp->dev = skb->dev; |
2de8e0d9 JB |
814 | |
815 | /* copy header and data */ | |
816 | memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen); | |
817 | memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen); | |
818 | ||
819 | pos += fraglen; | |
820 | } | |
821 | ||
822 | skb->len = hdrlen + per_fragm; | |
823 | return 0; | |
824 | } | |
825 | ||
d9e8a70f | 826 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
827 | ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx) |
828 | { | |
2de8e0d9 JB |
829 | struct sk_buff *skb = tx->skb; |
830 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
831 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
b9a5f8ca | 832 | int frag_threshold = tx->local->hw.wiphy->frag_threshold; |
2de8e0d9 JB |
833 | int hdrlen; |
834 | int fragnum; | |
e2454948 JB |
835 | |
836 | if (!(tx->flags & IEEE80211_TX_FRAGMENTED)) | |
837 | return TX_CONTINUE; | |
838 | ||
eefce91a JB |
839 | /* |
840 | * Warn when submitting a fragmented A-MPDU frame and drop it. | |
3b8d81e0 | 841 | * This scenario is handled in ieee80211_tx_prepare but extra |
8d5e0d58 | 842 | * caution taken here as fragmented ampdu may cause Tx stop. |
eefce91a | 843 | */ |
8b30b1fe | 844 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
eefce91a JB |
845 | return TX_DROP; |
846 | ||
065e9605 | 847 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2454948 | 848 | |
2de8e0d9 | 849 | /* internal error, why is TX_FRAGMENTED set? */ |
8ccd8f21 | 850 | if (WARN_ON(skb->len + FCS_LEN <= frag_threshold)) |
2de8e0d9 | 851 | return TX_DROP; |
e6a9854b | 852 | |
2de8e0d9 JB |
853 | /* |
854 | * Now fragment the frame. This will allocate all the fragments and | |
855 | * chain them (using skb as the first fragment) to skb->next. | |
856 | * During transmission, we will remove the successfully transmitted | |
857 | * fragments from this list. When the low-level driver rejects one | |
858 | * of the fragments then we will simply pretend to accept the skb | |
859 | * but store it away as pending. | |
860 | */ | |
861 | if (ieee80211_fragment(tx->local, skb, hdrlen, frag_threshold)) | |
862 | return TX_DROP; | |
e6a9854b | 863 | |
2de8e0d9 JB |
864 | /* update duration/seq/flags of fragments */ |
865 | fragnum = 0; | |
866 | do { | |
867 | int next_len; | |
868 | const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
e6a9854b | 869 | |
2de8e0d9 JB |
870 | hdr = (void *)skb->data; |
871 | info = IEEE80211_SKB_CB(skb); | |
e6a9854b | 872 | |
2de8e0d9 JB |
873 | if (skb->next) { |
874 | hdr->frame_control |= morefrags; | |
875 | next_len = skb->next->len; | |
e6a9854b JB |
876 | /* |
877 | * No multi-rate retries for fragmented frames, that | |
878 | * would completely throw off the NAV at other STAs. | |
879 | */ | |
880 | info->control.rates[1].idx = -1; | |
881 | info->control.rates[2].idx = -1; | |
882 | info->control.rates[3].idx = -1; | |
883 | info->control.rates[4].idx = -1; | |
884 | BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 5); | |
885 | info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE; | |
2de8e0d9 JB |
886 | } else { |
887 | hdr->frame_control &= ~morefrags; | |
888 | next_len = 0; | |
e6a9854b | 889 | } |
2de8e0d9 JB |
890 | hdr->duration_id = ieee80211_duration(tx, 0, next_len); |
891 | hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG); | |
892 | fragnum++; | |
893 | } while ((skb = skb->next)); | |
e2ebc74d | 894 | |
9ae54c84 | 895 | return TX_CONTINUE; |
e2ebc74d JB |
896 | } |
897 | ||
feff1f2f JB |
898 | static ieee80211_tx_result debug_noinline |
899 | ieee80211_tx_h_stats(struct ieee80211_tx_data *tx) | |
900 | { | |
901 | struct sk_buff *skb = tx->skb; | |
902 | ||
903 | if (!tx->sta) | |
904 | return TX_CONTINUE; | |
905 | ||
906 | tx->sta->tx_packets++; | |
907 | do { | |
908 | tx->sta->tx_fragments++; | |
909 | tx->sta->tx_bytes += skb->len; | |
910 | } while ((skb = skb->next)); | |
911 | ||
912 | return TX_CONTINUE; | |
913 | } | |
914 | ||
d9e8a70f | 915 | static ieee80211_tx_result debug_noinline |
e2454948 JB |
916 | ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx) |
917 | { | |
918 | if (!tx->key) | |
919 | return TX_CONTINUE; | |
920 | ||
921 | switch (tx->key->conf.alg) { | |
922 | case ALG_WEP: | |
923 | return ieee80211_crypto_wep_encrypt(tx); | |
924 | case ALG_TKIP: | |
925 | return ieee80211_crypto_tkip_encrypt(tx); | |
926 | case ALG_CCMP: | |
927 | return ieee80211_crypto_ccmp_encrypt(tx); | |
3cfcf6ac JM |
928 | case ALG_AES_CMAC: |
929 | return ieee80211_crypto_aes_cmac_encrypt(tx); | |
e2454948 JB |
930 | } |
931 | ||
932 | /* not reached */ | |
933 | WARN_ON(1); | |
934 | return TX_DROP; | |
935 | } | |
936 | ||
d9e8a70f | 937 | static ieee80211_tx_result debug_noinline |
03f93c3d JB |
938 | ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx) |
939 | { | |
2de8e0d9 JB |
940 | struct sk_buff *skb = tx->skb; |
941 | struct ieee80211_hdr *hdr; | |
942 | int next_len; | |
943 | bool group_addr; | |
03f93c3d | 944 | |
2de8e0d9 JB |
945 | do { |
946 | hdr = (void *) skb->data; | |
7e0aae47 JM |
947 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) |
948 | break; /* must not overwrite AID */ | |
2de8e0d9 JB |
949 | next_len = skb->next ? skb->next->len : 0; |
950 | group_addr = is_multicast_ether_addr(hdr->addr1); | |
03f93c3d | 951 | |
2de8e0d9 JB |
952 | hdr->duration_id = |
953 | ieee80211_duration(tx, group_addr, next_len); | |
954 | } while ((skb = skb->next)); | |
03f93c3d JB |
955 | |
956 | return TX_CONTINUE; | |
957 | } | |
958 | ||
e2ebc74d JB |
959 | /* actual transmit path */ |
960 | ||
961 | /* | |
962 | * deal with packet injection down monitor interface | |
963 | * with Radiotap Header -- only called for monitor mode interface | |
964 | */ | |
27004b10 JB |
965 | static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx, |
966 | struct sk_buff *skb) | |
e2ebc74d JB |
967 | { |
968 | /* | |
969 | * this is the moment to interpret and discard the radiotap header that | |
970 | * must be at the start of the packet injected in Monitor mode | |
971 | * | |
972 | * Need to take some care with endian-ness since radiotap | |
973 | * args are little-endian | |
974 | */ | |
975 | ||
976 | struct ieee80211_radiotap_iterator iterator; | |
977 | struct ieee80211_radiotap_header *rthdr = | |
978 | (struct ieee80211_radiotap_header *) skb->data; | |
8318d78a | 979 | struct ieee80211_supported_band *sband; |
3b8d81e0 | 980 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e2ebc74d JB |
981 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len); |
982 | ||
2e92e6f2 | 983 | sband = tx->local->hw.wiphy->bands[tx->channel->band]; |
8318d78a | 984 | |
3b8d81e0 | 985 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
5cf121c3 | 986 | tx->flags &= ~IEEE80211_TX_FRAGMENTED; |
e2ebc74d JB |
987 | |
988 | /* | |
989 | * for every radiotap entry that is present | |
990 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
991 | * entries present, or -EINVAL on error) | |
992 | */ | |
993 | ||
994 | while (!ret) { | |
e2ebc74d JB |
995 | ret = ieee80211_radiotap_iterator_next(&iterator); |
996 | ||
997 | if (ret) | |
998 | continue; | |
999 | ||
1000 | /* see if this argument is something we can use */ | |
1001 | switch (iterator.this_arg_index) { | |
1002 | /* | |
1003 | * You must take care when dereferencing iterator.this_arg | |
1004 | * for multibyte types... the pointer is not aligned. Use | |
1005 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1006 | * iterator.this_arg for type "type" safely on all arches. | |
1007 | */ | |
e2ebc74d JB |
1008 | case IEEE80211_RADIOTAP_FLAGS: |
1009 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1010 | /* | |
1011 | * this indicates that the skb we have been | |
1012 | * handed has the 32-bit FCS CRC at the end... | |
1013 | * we should react to that by snipping it off | |
1014 | * because it will be recomputed and added | |
1015 | * on transmission | |
1016 | */ | |
1017 | if (skb->len < (iterator.max_length + FCS_LEN)) | |
27004b10 | 1018 | return false; |
e2ebc74d JB |
1019 | |
1020 | skb_trim(skb, skb->len - FCS_LEN); | |
1021 | } | |
58d4185e | 1022 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP) |
3b8d81e0 | 1023 | info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT; |
58d4185e | 1024 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG) |
5cf121c3 | 1025 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
e2ebc74d JB |
1026 | break; |
1027 | ||
58d4185e JB |
1028 | /* |
1029 | * Please update the file | |
1030 | * Documentation/networking/mac80211-injection.txt | |
1031 | * when parsing new fields here. | |
1032 | */ | |
1033 | ||
e2ebc74d JB |
1034 | default: |
1035 | break; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
27004b10 | 1040 | return false; |
e2ebc74d JB |
1041 | |
1042 | /* | |
1043 | * remove the radiotap header | |
1044 | * iterator->max_length was sanity-checked against | |
1045 | * skb->len by iterator init | |
1046 | */ | |
1047 | skb_pull(skb, iterator.max_length); | |
1048 | ||
27004b10 | 1049 | return true; |
e2ebc74d JB |
1050 | } |
1051 | ||
58d4185e JB |
1052 | /* |
1053 | * initialises @tx | |
1054 | */ | |
9ae54c84 | 1055 | static ieee80211_tx_result |
3b8d81e0 JB |
1056 | ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, |
1057 | struct ieee80211_tx_data *tx, | |
1058 | struct sk_buff *skb) | |
e2ebc74d | 1059 | { |
3b8d81e0 | 1060 | struct ieee80211_local *local = sdata->local; |
58d4185e | 1061 | struct ieee80211_hdr *hdr; |
e039fa4a | 1062 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
8b30b1fe S |
1063 | int hdrlen, tid; |
1064 | u8 *qc, *state; | |
cd8ffc80 | 1065 | bool queued = false; |
e2ebc74d JB |
1066 | |
1067 | memset(tx, 0, sizeof(*tx)); | |
1068 | tx->skb = skb; | |
e2ebc74d | 1069 | tx->local = local; |
3b8d81e0 | 1070 | tx->sdata = sdata; |
e039fa4a | 1071 | tx->channel = local->hw.conf.channel; |
e2ebc74d | 1072 | /* |
58d4185e JB |
1073 | * Set this flag (used below to indicate "automatic fragmentation"), |
1074 | * it will be cleared/left by radiotap as desired. | |
e2ebc74d | 1075 | */ |
5cf121c3 | 1076 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
e2ebc74d JB |
1077 | |
1078 | /* process and remove the injection radiotap header */ | |
25d834e1 | 1079 | if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED)) { |
27004b10 | 1080 | if (!__ieee80211_parse_tx_radiotap(tx, skb)) |
9ae54c84 | 1081 | return TX_DROP; |
58d4185e | 1082 | |
e2ebc74d | 1083 | /* |
58d4185e JB |
1084 | * __ieee80211_parse_tx_radiotap has now removed |
1085 | * the radiotap header that was present and pre-filled | |
1086 | * 'tx' with tx control information. | |
e2ebc74d | 1087 | */ |
e2ebc74d JB |
1088 | } |
1089 | ||
cd8ffc80 JB |
1090 | /* |
1091 | * If this flag is set to true anywhere, and we get here, | |
1092 | * we are doing the needed processing, so remove the flag | |
1093 | * now. | |
1094 | */ | |
1095 | info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
1096 | ||
58d4185e JB |
1097 | hdr = (struct ieee80211_hdr *) skb->data; |
1098 | ||
3f0e0b22 | 1099 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { |
f14543ee | 1100 | tx->sta = rcu_dereference(sdata->u.vlan.sta); |
3f0e0b22 FF |
1101 | if (!tx->sta && sdata->dev->ieee80211_ptr->use_4addr) |
1102 | return TX_DROP; | |
1103 | } | |
f14543ee | 1104 | if (!tx->sta) |
abe60632 | 1105 | tx->sta = sta_info_get(sdata, hdr->addr1); |
58d4185e | 1106 | |
cd8ffc80 JB |
1107 | if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) && |
1108 | (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)) { | |
96f5e66e | 1109 | unsigned long flags; |
cd8ffc80 JB |
1110 | struct tid_ampdu_tx *tid_tx; |
1111 | ||
8b30b1fe S |
1112 | qc = ieee80211_get_qos_ctl(hdr); |
1113 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
1114 | ||
96f5e66e | 1115 | spin_lock_irqsave(&tx->sta->lock, flags); |
cd8ffc80 JB |
1116 | /* |
1117 | * XXX: This spinlock could be fairly expensive, but see the | |
1118 | * comment in agg-tx.c:ieee80211_agg_tx_operational(). | |
1119 | * One way to solve this would be to do something RCU-like | |
1120 | * for managing the tid_tx struct and using atomic bitops | |
1121 | * for the actual state -- by introducing an actual | |
1122 | * 'operational' bit that would be possible. It would | |
1123 | * require changing ieee80211_agg_tx_operational() to | |
1124 | * set that bit, and changing the way tid_tx is managed | |
1125 | * everywhere, including races between that bit and | |
1126 | * tid_tx going away (tid_tx being added can be easily | |
1127 | * committed to memory before the 'operational' bit). | |
1128 | */ | |
1129 | tid_tx = tx->sta->ampdu_mlme.tid_tx[tid]; | |
8b30b1fe | 1130 | state = &tx->sta->ampdu_mlme.tid_state_tx[tid]; |
cd8ffc80 | 1131 | if (*state == HT_AGG_STATE_OPERATIONAL) { |
8b30b1fe | 1132 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
cd8ffc80 JB |
1133 | } else if (*state != HT_AGG_STATE_IDLE) { |
1134 | /* in progress */ | |
1135 | queued = true; | |
5061b0c2 | 1136 | info->control.vif = &sdata->vif; |
cd8ffc80 JB |
1137 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; |
1138 | __skb_queue_tail(&tid_tx->pending, skb); | |
1139 | } | |
96f5e66e | 1140 | spin_unlock_irqrestore(&tx->sta->lock, flags); |
cd8ffc80 JB |
1141 | |
1142 | if (unlikely(queued)) | |
1143 | return TX_QUEUED; | |
8b30b1fe S |
1144 | } |
1145 | ||
badffb72 | 1146 | if (is_multicast_ether_addr(hdr->addr1)) { |
5cf121c3 | 1147 | tx->flags &= ~IEEE80211_TX_UNICAST; |
e039fa4a | 1148 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
badffb72 | 1149 | } else { |
5cf121c3 | 1150 | tx->flags |= IEEE80211_TX_UNICAST; |
d3707d99 JB |
1151 | if (unlikely(local->wifi_wme_noack_test)) |
1152 | info->flags |= IEEE80211_TX_CTL_NO_ACK; | |
1153 | else | |
1154 | info->flags &= ~IEEE80211_TX_CTL_NO_ACK; | |
badffb72 | 1155 | } |
58d4185e | 1156 | |
5cf121c3 JB |
1157 | if (tx->flags & IEEE80211_TX_FRAGMENTED) { |
1158 | if ((tx->flags & IEEE80211_TX_UNICAST) && | |
b9a5f8ca | 1159 | skb->len + FCS_LEN > local->hw.wiphy->frag_threshold && |
8d5e0d58 | 1160 | !(info->flags & IEEE80211_TX_CTL_AMPDU)) |
5cf121c3 | 1161 | tx->flags |= IEEE80211_TX_FRAGMENTED; |
58d4185e | 1162 | else |
5cf121c3 | 1163 | tx->flags &= ~IEEE80211_TX_FRAGMENTED; |
58d4185e JB |
1164 | } |
1165 | ||
e2ebc74d | 1166 | if (!tx->sta) |
e039fa4a | 1167 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
07346f81 | 1168 | else if (test_and_clear_sta_flags(tx->sta, WLAN_STA_CLEAR_PS_FILT)) |
e039fa4a | 1169 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
58d4185e | 1170 | |
b73d70ad | 1171 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
e2ebc74d JB |
1172 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { |
1173 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; | |
1174 | tx->ethertype = (pos[0] << 8) | pos[1]; | |
1175 | } | |
e039fa4a | 1176 | info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT; |
e2ebc74d | 1177 | |
9ae54c84 | 1178 | return TX_CONTINUE; |
e2ebc74d JB |
1179 | } |
1180 | ||
2de8e0d9 | 1181 | static int __ieee80211_tx(struct ieee80211_local *local, |
1870cd71 | 1182 | struct sk_buff **skbp, |
3b8d81e0 JB |
1183 | struct sta_info *sta, |
1184 | bool txpending) | |
e2ebc74d | 1185 | { |
1870cd71 | 1186 | struct sk_buff *skb = *skbp, *next; |
f8e79ddd | 1187 | struct ieee80211_tx_info *info; |
5061b0c2 | 1188 | struct ieee80211_sub_if_data *sdata; |
3b8d81e0 | 1189 | unsigned long flags; |
a220858d | 1190 | int ret, len; |
2de8e0d9 | 1191 | bool fragm = false; |
e2ebc74d | 1192 | |
2de8e0d9 | 1193 | while (skb) { |
3b8d81e0 JB |
1194 | int q = skb_get_queue_mapping(skb); |
1195 | ||
1196 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); | |
1197 | ret = IEEE80211_TX_OK; | |
1198 | if (local->queue_stop_reasons[q] || | |
1199 | (!txpending && !skb_queue_empty(&local->pending[q]))) | |
1200 | ret = IEEE80211_TX_PENDING; | |
1201 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); | |
1202 | if (ret != IEEE80211_TX_OK) | |
1203 | return ret; | |
f8e79ddd | 1204 | |
f0e72851 JB |
1205 | info = IEEE80211_SKB_CB(skb); |
1206 | ||
1207 | if (fragm) | |
e6a9854b | 1208 | info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT | |
e039fa4a | 1209 | IEEE80211_TX_CTL_FIRST_FRAGMENT); |
f0e72851 | 1210 | |
2de8e0d9 | 1211 | next = skb->next; |
a220858d | 1212 | len = skb->len; |
5061b0c2 | 1213 | |
ad5351db JB |
1214 | if (next) |
1215 | info->flags |= IEEE80211_TX_CTL_MORE_FRAMES; | |
1216 | ||
5061b0c2 JB |
1217 | sdata = vif_to_sdata(info->control.vif); |
1218 | ||
1219 | switch (sdata->vif.type) { | |
1220 | case NL80211_IFTYPE_MONITOR: | |
1221 | info->control.vif = NULL; | |
1222 | break; | |
1223 | case NL80211_IFTYPE_AP_VLAN: | |
1224 | info->control.vif = &container_of(sdata->bss, | |
1225 | struct ieee80211_sub_if_data, u.ap)->vif; | |
1226 | break; | |
1227 | default: | |
1228 | /* keep */ | |
1229 | break; | |
1230 | } | |
1231 | ||
24487981 | 1232 | ret = drv_tx(local, skb); |
a220858d JB |
1233 | if (WARN_ON(ret != NETDEV_TX_OK && skb->len != len)) { |
1234 | dev_kfree_skb(skb); | |
1235 | ret = NETDEV_TX_OK; | |
1236 | } | |
21f5fc75 LR |
1237 | if (ret != NETDEV_TX_OK) { |
1238 | info->control.vif = &sdata->vif; | |
2de8e0d9 | 1239 | return IEEE80211_TX_AGAIN; |
21f5fc75 LR |
1240 | } |
1241 | ||
1870cd71 | 1242 | *skbp = skb = next; |
2de8e0d9 JB |
1243 | ieee80211_led_tx(local, 1); |
1244 | fragm = true; | |
e2ebc74d | 1245 | } |
2de8e0d9 | 1246 | |
e2ebc74d JB |
1247 | return IEEE80211_TX_OK; |
1248 | } | |
1249 | ||
97b045d6 JB |
1250 | /* |
1251 | * Invoke TX handlers, return 0 on success and non-zero if the | |
1252 | * frame was dropped or queued. | |
1253 | */ | |
1254 | static int invoke_tx_handlers(struct ieee80211_tx_data *tx) | |
1255 | { | |
97b045d6 | 1256 | struct sk_buff *skb = tx->skb; |
97b045d6 | 1257 | ieee80211_tx_result res = TX_DROP; |
97b045d6 | 1258 | |
9aa4aee3 JB |
1259 | #define CALL_TXH(txh) \ |
1260 | do { \ | |
1261 | res = txh(tx); \ | |
1262 | if (res != TX_CONTINUE) \ | |
1263 | goto txh_done; \ | |
1264 | } while (0) | |
1265 | ||
5c1b98a5 | 1266 | CALL_TXH(ieee80211_tx_h_dynamic_ps); |
9aa4aee3 JB |
1267 | CALL_TXH(ieee80211_tx_h_check_assoc); |
1268 | CALL_TXH(ieee80211_tx_h_ps_buf); | |
1269 | CALL_TXH(ieee80211_tx_h_select_key); | |
1270 | CALL_TXH(ieee80211_tx_h_michael_mic_add); | |
af65cd96 JB |
1271 | if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)) |
1272 | CALL_TXH(ieee80211_tx_h_rate_ctrl); | |
9aa4aee3 JB |
1273 | CALL_TXH(ieee80211_tx_h_misc); |
1274 | CALL_TXH(ieee80211_tx_h_sequence); | |
1275 | CALL_TXH(ieee80211_tx_h_fragment); | |
d9e8a70f | 1276 | /* handlers after fragment must be aware of tx info fragmentation! */ |
9aa4aee3 JB |
1277 | CALL_TXH(ieee80211_tx_h_stats); |
1278 | CALL_TXH(ieee80211_tx_h_encrypt); | |
1279 | CALL_TXH(ieee80211_tx_h_calculate_duration); | |
d9e8a70f | 1280 | #undef CALL_TXH |
97b045d6 | 1281 | |
d9e8a70f | 1282 | txh_done: |
97b045d6 | 1283 | if (unlikely(res == TX_DROP)) { |
5479d0e7 | 1284 | I802_DEBUG_INC(tx->local->tx_handlers_drop); |
2de8e0d9 JB |
1285 | while (skb) { |
1286 | struct sk_buff *next; | |
1287 | ||
1288 | next = skb->next; | |
1289 | dev_kfree_skb(skb); | |
1290 | skb = next; | |
1291 | } | |
97b045d6 JB |
1292 | return -1; |
1293 | } else if (unlikely(res == TX_QUEUED)) { | |
5479d0e7 | 1294 | I802_DEBUG_INC(tx->local->tx_handlers_queued); |
97b045d6 JB |
1295 | return -1; |
1296 | } | |
1297 | ||
1298 | return 0; | |
1299 | } | |
1300 | ||
3b8d81e0 JB |
1301 | static void ieee80211_tx(struct ieee80211_sub_if_data *sdata, |
1302 | struct sk_buff *skb, bool txpending) | |
e2ebc74d | 1303 | { |
3b8d81e0 | 1304 | struct ieee80211_local *local = sdata->local; |
5cf121c3 | 1305 | struct ieee80211_tx_data tx; |
97b045d6 | 1306 | ieee80211_tx_result res_prepare; |
e039fa4a | 1307 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
2a577d98 JB |
1308 | struct sk_buff *next; |
1309 | unsigned long flags; | |
1310 | int ret, retries; | |
e2530083 | 1311 | u16 queue; |
e2ebc74d | 1312 | |
e2530083 JB |
1313 | queue = skb_get_queue_mapping(skb); |
1314 | ||
e2ebc74d JB |
1315 | if (unlikely(skb->len < 10)) { |
1316 | dev_kfree_skb(skb); | |
cd8ffc80 | 1317 | return; |
e2ebc74d JB |
1318 | } |
1319 | ||
d0709a65 JB |
1320 | rcu_read_lock(); |
1321 | ||
58d4185e | 1322 | /* initialises tx */ |
3b8d81e0 | 1323 | res_prepare = ieee80211_tx_prepare(sdata, &tx, skb); |
e2ebc74d | 1324 | |
cd8ffc80 | 1325 | if (unlikely(res_prepare == TX_DROP)) { |
e2ebc74d | 1326 | dev_kfree_skb(skb); |
d0709a65 | 1327 | rcu_read_unlock(); |
cd8ffc80 JB |
1328 | return; |
1329 | } else if (unlikely(res_prepare == TX_QUEUED)) { | |
1330 | rcu_read_unlock(); | |
1331 | return; | |
e2ebc74d JB |
1332 | } |
1333 | ||
5cf121c3 | 1334 | tx.channel = local->hw.conf.channel; |
e039fa4a | 1335 | info->band = tx.channel->band; |
e2ebc74d | 1336 | |
97b045d6 JB |
1337 | if (invoke_tx_handlers(&tx)) |
1338 | goto out; | |
e2ebc74d | 1339 | |
2a577d98 JB |
1340 | retries = 0; |
1341 | retry: | |
3b8d81e0 | 1342 | ret = __ieee80211_tx(local, &tx.skb, tx.sta, txpending); |
2a577d98 JB |
1343 | switch (ret) { |
1344 | case IEEE80211_TX_OK: | |
1345 | break; | |
1346 | case IEEE80211_TX_AGAIN: | |
eefce91a JB |
1347 | /* |
1348 | * Since there are no fragmented frames on A-MPDU | |
1349 | * queues, there's no reason for a driver to reject | |
1350 | * a frame there, warn and drop it. | |
1351 | */ | |
2a577d98 JB |
1352 | if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU)) |
1353 | goto drop; | |
1354 | /* fall through */ | |
1355 | case IEEE80211_TX_PENDING: | |
1356 | skb = tx.skb; | |
eefce91a | 1357 | |
2a577d98 | 1358 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
e2ebc74d | 1359 | |
3b8d81e0 JB |
1360 | if (local->queue_stop_reasons[queue] || |
1361 | !skb_queue_empty(&local->pending[queue])) { | |
1362 | /* | |
1363 | * if queue is stopped, queue up frames for later | |
1364 | * transmission from the tasklet | |
1365 | */ | |
2a577d98 JB |
1366 | do { |
1367 | next = skb->next; | |
1368 | skb->next = NULL; | |
cd8ffc80 | 1369 | if (unlikely(txpending)) |
3b8d81e0 JB |
1370 | __skb_queue_head(&local->pending[queue], |
1371 | skb); | |
cd8ffc80 | 1372 | else |
3b8d81e0 JB |
1373 | __skb_queue_tail(&local->pending[queue], |
1374 | skb); | |
2a577d98 JB |
1375 | } while ((skb = next)); |
1376 | ||
2a577d98 JB |
1377 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
1378 | flags); | |
1379 | } else { | |
3b8d81e0 JB |
1380 | /* |
1381 | * otherwise retry, but this is a race condition or | |
1382 | * a driver bug (which we warn about if it persists) | |
1383 | */ | |
2a577d98 JB |
1384 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
1385 | flags); | |
1386 | ||
1387 | retries++; | |
3b8d81e0 | 1388 | if (WARN(retries > 10, "tx refused but queue active\n")) |
2a577d98 | 1389 | goto drop; |
e2ebc74d JB |
1390 | goto retry; |
1391 | } | |
e2ebc74d | 1392 | } |
97b045d6 | 1393 | out: |
d4e46a3d | 1394 | rcu_read_unlock(); |
cd8ffc80 | 1395 | return; |
e2ebc74d JB |
1396 | |
1397 | drop: | |
d4e46a3d | 1398 | rcu_read_unlock(); |
2de8e0d9 JB |
1399 | |
1400 | skb = tx.skb; | |
1401 | while (skb) { | |
2de8e0d9 JB |
1402 | next = skb->next; |
1403 | dev_kfree_skb(skb); | |
1404 | skb = next; | |
1405 | } | |
e2ebc74d JB |
1406 | } |
1407 | ||
1408 | /* device xmit handlers */ | |
1409 | ||
23c0752a JB |
1410 | static int ieee80211_skb_resize(struct ieee80211_local *local, |
1411 | struct sk_buff *skb, | |
1412 | int head_need, bool may_encrypt) | |
1413 | { | |
1414 | int tail_need = 0; | |
1415 | ||
1416 | /* | |
1417 | * This could be optimised, devices that do full hardware | |
1418 | * crypto (including TKIP MMIC) need no tailroom... But we | |
1419 | * have no drivers for such devices currently. | |
1420 | */ | |
1421 | if (may_encrypt) { | |
1422 | tail_need = IEEE80211_ENCRYPT_TAILROOM; | |
1423 | tail_need -= skb_tailroom(skb); | |
1424 | tail_need = max_t(int, tail_need, 0); | |
1425 | } | |
1426 | ||
1427 | if (head_need || tail_need) { | |
1428 | /* Sorry. Can't account for this any more */ | |
1429 | skb_orphan(skb); | |
1430 | } | |
1431 | ||
1432 | if (skb_header_cloned(skb)) | |
1433 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); | |
1434 | else | |
1435 | I802_DEBUG_INC(local->tx_expand_skb_head); | |
1436 | ||
1437 | if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) { | |
1438 | printk(KERN_DEBUG "%s: failed to reallocate TX buffer\n", | |
1439 | wiphy_name(local->hw.wiphy)); | |
1440 | return -ENOMEM; | |
1441 | } | |
1442 | ||
1443 | /* update truesize too */ | |
1444 | skb->truesize += head_need + tail_need; | |
1445 | ||
1446 | return 0; | |
1447 | } | |
1448 | ||
3b8d81e0 JB |
1449 | static void ieee80211_xmit(struct ieee80211_sub_if_data *sdata, |
1450 | struct sk_buff *skb) | |
e2ebc74d | 1451 | { |
3b8d81e0 | 1452 | struct ieee80211_local *local = sdata->local; |
e039fa4a | 1453 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e32f85f7 | 1454 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
3b8d81e0 | 1455 | struct ieee80211_sub_if_data *tmp_sdata; |
e2ebc74d | 1456 | int headroom; |
23c0752a | 1457 | bool may_encrypt; |
e2ebc74d | 1458 | |
d84f3234 JB |
1459 | rcu_read_lock(); |
1460 | ||
cca89496 | 1461 | if (unlikely(sdata->vif.type == NL80211_IFTYPE_MONITOR)) { |
25d834e1 JB |
1462 | int hdrlen; |
1463 | u16 len_rthdr; | |
1464 | ||
1465 | info->flags |= IEEE80211_TX_CTL_INJECTED; | |
25d834e1 JB |
1466 | |
1467 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
8ef86c7b | 1468 | hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr); |
25d834e1 JB |
1469 | hdrlen = ieee80211_hdrlen(hdr->frame_control); |
1470 | ||
1471 | /* check the header is complete in the frame */ | |
1472 | if (likely(skb->len >= len_rthdr + hdrlen)) { | |
1473 | /* | |
1474 | * We process outgoing injected frames that have a | |
1475 | * local address we handle as though they are our | |
1476 | * own frames. | |
1477 | * This code here isn't entirely correct, the local | |
1478 | * MAC address is not necessarily enough to find | |
1479 | * the interface to use; for that proper VLAN/WDS | |
1480 | * support we will need a different mechanism. | |
1481 | */ | |
1482 | ||
3b8d81e0 | 1483 | list_for_each_entry_rcu(tmp_sdata, &local->interfaces, |
25d834e1 | 1484 | list) { |
9607e6b6 | 1485 | if (!ieee80211_sdata_running(tmp_sdata)) |
25d834e1 | 1486 | continue; |
3b8d81e0 | 1487 | if (tmp_sdata->vif.type != NL80211_IFTYPE_AP) |
f1b33cb1 | 1488 | continue; |
47846c9b | 1489 | if (compare_ether_addr(tmp_sdata->vif.addr, |
9b1ce526 | 1490 | hdr->addr2) == 0) { |
3b8d81e0 | 1491 | sdata = tmp_sdata; |
25d834e1 JB |
1492 | break; |
1493 | } | |
1494 | } | |
25d834e1 | 1495 | } |
e32f85f7 LCC |
1496 | } |
1497 | ||
3b8d81e0 | 1498 | may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT); |
23c0752a | 1499 | |
3b8d81e0 | 1500 | headroom = local->tx_headroom; |
23c0752a JB |
1501 | if (may_encrypt) |
1502 | headroom += IEEE80211_ENCRYPT_HEADROOM; | |
1503 | headroom -= skb_headroom(skb); | |
1504 | headroom = max_t(int, 0, headroom); | |
1505 | ||
3b8d81e0 | 1506 | if (ieee80211_skb_resize(local, skb, headroom, may_encrypt)) { |
23c0752a | 1507 | dev_kfree_skb(skb); |
d84f3234 | 1508 | rcu_read_unlock(); |
3b8d81e0 | 1509 | return; |
e2ebc74d JB |
1510 | } |
1511 | ||
5061b0c2 | 1512 | info->control.vif = &sdata->vif; |
e2ebc74d | 1513 | |
cca89496 JC |
1514 | if (ieee80211_vif_is_mesh(&sdata->vif) && |
1515 | ieee80211_is_data(hdr->frame_control) && | |
1516 | !is_multicast_ether_addr(hdr->addr1)) | |
1517 | if (mesh_nexthop_lookup(skb, sdata)) { | |
1518 | /* skb queued: don't free */ | |
d84f3234 | 1519 | rcu_read_unlock(); |
cca89496 JC |
1520 | return; |
1521 | } | |
1522 | ||
cf0277e7 | 1523 | ieee80211_set_qos_hdr(local, skb); |
3b8d81e0 | 1524 | ieee80211_tx(sdata, skb, false); |
d84f3234 | 1525 | rcu_read_unlock(); |
e2ebc74d JB |
1526 | } |
1527 | ||
d0cf9c0d SH |
1528 | netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1529 | struct net_device *dev) | |
e2ebc74d JB |
1530 | { |
1531 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
47f4d887 | 1532 | struct ieee80211_channel *chan = local->hw.conf.channel; |
e2ebc74d JB |
1533 | struct ieee80211_radiotap_header *prthdr = |
1534 | (struct ieee80211_radiotap_header *)skb->data; | |
3b8d81e0 | 1535 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
9b8a74e3 | 1536 | u16 len_rthdr; |
e2ebc74d | 1537 | |
47f4d887 LR |
1538 | /* |
1539 | * Frame injection is not allowed if beaconing is not allowed | |
1540 | * or if we need radar detection. Beaconing is usually not allowed when | |
1541 | * the mode or operation (Adhoc, AP, Mesh) does not support DFS. | |
1542 | * Passive scan is also used in world regulatory domains where | |
1543 | * your country is not known and as such it should be treated as | |
1544 | * NO TX unless the channel is explicitly allowed in which case | |
1545 | * your current regulatory domain would not have the passive scan | |
1546 | * flag. | |
1547 | * | |
1548 | * Since AP mode uses monitor interfaces to inject/TX management | |
1549 | * frames we can make AP mode the exception to this rule once it | |
1550 | * supports radar detection as its implementation can deal with | |
1551 | * radar detection by itself. We can do that later by adding a | |
1552 | * monitor flag interfaces used for AP support. | |
1553 | */ | |
1554 | if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR | | |
1555 | IEEE80211_CHAN_PASSIVE_SCAN))) | |
1556 | goto fail; | |
1557 | ||
9b8a74e3 AG |
1558 | /* check for not even having the fixed radiotap header part */ |
1559 | if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header))) | |
1560 | goto fail; /* too short to be possibly valid */ | |
1561 | ||
1562 | /* is it a header version we can trust to find length from? */ | |
1563 | if (unlikely(prthdr->it_version)) | |
1564 | goto fail; /* only version 0 is supported */ | |
1565 | ||
1566 | /* then there must be a radiotap header with a length we can use */ | |
1567 | len_rthdr = ieee80211_get_radiotap_len(skb->data); | |
1568 | ||
1569 | /* does the skb contain enough to deliver on the alleged length? */ | |
1570 | if (unlikely(skb->len < len_rthdr)) | |
1571 | goto fail; /* skb too short for claimed rt header extent */ | |
e2ebc74d | 1572 | |
e2ebc74d JB |
1573 | /* |
1574 | * fix up the pointers accounting for the radiotap | |
1575 | * header still being in there. We are being given | |
1576 | * a precooked IEEE80211 header so no need for | |
1577 | * normal processing | |
1578 | */ | |
9b8a74e3 | 1579 | skb_set_mac_header(skb, len_rthdr); |
e2ebc74d | 1580 | /* |
9b8a74e3 AG |
1581 | * these are just fixed to the end of the rt area since we |
1582 | * don't have any better information and at this point, nobody cares | |
e2ebc74d | 1583 | */ |
9b8a74e3 AG |
1584 | skb_set_network_header(skb, len_rthdr); |
1585 | skb_set_transport_header(skb, len_rthdr); | |
e2ebc74d | 1586 | |
3b8d81e0 JB |
1587 | memset(info, 0, sizeof(*info)); |
1588 | ||
7351c6bd JB |
1589 | info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; |
1590 | ||
3b8d81e0 JB |
1591 | /* pass the radiotap header up to xmit */ |
1592 | ieee80211_xmit(IEEE80211_DEV_TO_SUB_IF(dev), skb); | |
e2ebc74d | 1593 | return NETDEV_TX_OK; |
9b8a74e3 AG |
1594 | |
1595 | fail: | |
1596 | dev_kfree_skb(skb); | |
1597 | return NETDEV_TX_OK; /* meaning, we dealt with the skb */ | |
e2ebc74d JB |
1598 | } |
1599 | ||
1600 | /** | |
1601 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1602 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1603 | * @skb: packet to be sent | |
1604 | * @dev: incoming interface | |
1605 | * | |
1606 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1607 | * not be freed, and caller is responsible for either retrying later or freeing | |
1608 | * skb). | |
1609 | * | |
1610 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1611 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1612 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1613 | * transmission (through low-level driver). | |
1614 | */ | |
d0cf9c0d SH |
1615 | netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, |
1616 | struct net_device *dev) | |
e2ebc74d | 1617 | { |
133b8226 JB |
1618 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
1619 | struct ieee80211_local *local = sdata->local; | |
3b8d81e0 | 1620 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
5b548140 | 1621 | int ret = NETDEV_TX_BUSY, head_need; |
065e9605 HH |
1622 | u16 ethertype, hdrlen, meshhdrlen = 0; |
1623 | __le16 fc; | |
e2ebc74d | 1624 | struct ieee80211_hdr hdr; |
33b64eb2 | 1625 | struct ieee80211s_hdr mesh_hdr; |
e2ebc74d JB |
1626 | const u8 *encaps_data; |
1627 | int encaps_len, skip_header_bytes; | |
e8bf9649 | 1628 | int nh_pos, h_pos; |
f14543ee | 1629 | struct sta_info *sta = NULL; |
ce3edf6d | 1630 | u32 sta_flags = 0; |
e2ebc74d | 1631 | |
e2ebc74d | 1632 | if (unlikely(skb->len < ETH_HLEN)) { |
ec634fe3 | 1633 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1634 | goto fail; |
1635 | } | |
1636 | ||
1637 | nh_pos = skb_network_header(skb) - skb->data; | |
1638 | h_pos = skb_transport_header(skb) - skb->data; | |
1639 | ||
1640 | /* convert Ethernet header to proper 802.11 header (based on | |
1641 | * operation mode) */ | |
1642 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
065e9605 | 1643 | fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); |
e2ebc74d | 1644 | |
51fb61e7 | 1645 | switch (sdata->vif.type) { |
05c914fe | 1646 | case NL80211_IFTYPE_AP_VLAN: |
f14543ee | 1647 | rcu_read_lock(); |
9bc383de | 1648 | sta = rcu_dereference(sdata->u.vlan.sta); |
f14543ee FF |
1649 | if (sta) { |
1650 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); | |
1651 | /* RA TA DA SA */ | |
1652 | memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN); | |
47846c9b | 1653 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1654 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1655 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1656 | hdrlen = 30; | |
1657 | sta_flags = get_sta_flags(sta); | |
1658 | } | |
1659 | rcu_read_unlock(); | |
1660 | if (sta) | |
1661 | break; | |
1662 | /* fall through */ | |
1663 | case NL80211_IFTYPE_AP: | |
065e9605 | 1664 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); |
e2ebc74d JB |
1665 | /* DA BSSID SA */ |
1666 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
47846c9b | 1667 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1668 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
1669 | hdrlen = 24; | |
cf966838 | 1670 | break; |
05c914fe | 1671 | case NL80211_IFTYPE_WDS: |
065e9605 | 1672 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
e2ebc74d JB |
1673 | /* RA TA DA SA */ |
1674 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
47846c9b | 1675 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
e2ebc74d JB |
1676 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1677 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1678 | hdrlen = 30; | |
cf966838 | 1679 | break; |
33b64eb2 | 1680 | #ifdef CONFIG_MAC80211_MESH |
05c914fe | 1681 | case NL80211_IFTYPE_MESH_POINT: |
472dbc45 | 1682 | if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { |
e32f85f7 | 1683 | /* Do not send frames with mesh_ttl == 0 */ |
472dbc45 | 1684 | sdata->u.mesh.mshstats.dropped_frames_ttl++; |
ec634fe3 | 1685 | ret = NETDEV_TX_OK; |
e32f85f7 | 1686 | goto fail; |
33b64eb2 | 1687 | } |
79617dee | 1688 | |
47846c9b JB |
1689 | if (compare_ether_addr(sdata->vif.addr, |
1690 | skb->data + ETH_ALEN) == 0) { | |
3c5772a5 JC |
1691 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
1692 | skb->data, skb->data + ETH_ALEN); | |
1693 | meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, | |
1694 | sdata, NULL, NULL, NULL); | |
79617dee Y |
1695 | } else { |
1696 | /* packet from other interface */ | |
1697 | struct mesh_path *mppath; | |
3c5772a5 | 1698 | int is_mesh_mcast = 1; |
15ff6365 | 1699 | const u8 *mesh_da; |
79617dee | 1700 | |
3c5772a5 | 1701 | rcu_read_lock(); |
79617dee | 1702 | if (is_multicast_ether_addr(skb->data)) |
3c5772a5 JC |
1703 | /* DA TA mSA AE:SA */ |
1704 | mesh_da = skb->data; | |
79617dee | 1705 | else { |
15ff6365 JB |
1706 | static const u8 bcast[ETH_ALEN] = |
1707 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
1708 | ||
79617dee | 1709 | mppath = mpp_path_lookup(skb->data, sdata); |
3c5772a5 JC |
1710 | if (mppath) { |
1711 | /* RA TA mDA mSA AE:DA SA */ | |
1712 | mesh_da = mppath->mpp; | |
1713 | is_mesh_mcast = 0; | |
15ff6365 | 1714 | } else { |
3c5772a5 | 1715 | /* DA TA mSA AE:SA */ |
15ff6365 JB |
1716 | mesh_da = bcast; |
1717 | } | |
79617dee | 1718 | } |
3c5772a5 | 1719 | hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, |
47846c9b | 1720 | mesh_da, sdata->vif.addr); |
3c5772a5 JC |
1721 | rcu_read_unlock(); |
1722 | if (is_mesh_mcast) | |
1723 | meshhdrlen = | |
1724 | ieee80211_new_mesh_header(&mesh_hdr, | |
1725 | sdata, | |
1726 | skb->data + ETH_ALEN, | |
1727 | NULL, | |
1728 | NULL); | |
1729 | else | |
1730 | meshhdrlen = | |
1731 | ieee80211_new_mesh_header(&mesh_hdr, | |
1732 | sdata, | |
1733 | NULL, | |
1734 | skb->data, | |
1735 | skb->data + ETH_ALEN); | |
79617dee | 1736 | |
79617dee | 1737 | } |
33b64eb2 LCC |
1738 | break; |
1739 | #endif | |
05c914fe | 1740 | case NL80211_IFTYPE_STATION: |
46900298 | 1741 | memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); |
9bc383de | 1742 | if (sdata->u.mgd.use_4addr && ethertype != ETH_P_PAE) { |
f14543ee FF |
1743 | fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); |
1744 | /* RA TA DA SA */ | |
47846c9b | 1745 | memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN); |
f14543ee FF |
1746 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
1747 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1748 | hdrlen = 30; | |
1749 | } else { | |
1750 | fc |= cpu_to_le16(IEEE80211_FCTL_TODS); | |
1751 | /* BSSID SA DA */ | |
1752 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1753 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1754 | hdrlen = 24; | |
1755 | } | |
cf966838 | 1756 | break; |
05c914fe | 1757 | case NL80211_IFTYPE_ADHOC: |
e2ebc74d JB |
1758 | /* DA SA BSSID */ |
1759 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1760 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
46900298 | 1761 | memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN); |
e2ebc74d | 1762 | hdrlen = 24; |
cf966838 JB |
1763 | break; |
1764 | default: | |
ec634fe3 | 1765 | ret = NETDEV_TX_OK; |
e2ebc74d JB |
1766 | goto fail; |
1767 | } | |
1768 | ||
7d185b8b JB |
1769 | /* |
1770 | * There's no need to try to look up the destination | |
1771 | * if it is a multicast address (which can only happen | |
1772 | * in AP mode) | |
1773 | */ | |
1774 | if (!is_multicast_ether_addr(hdr.addr1)) { | |
d0709a65 | 1775 | rcu_read_lock(); |
abe60632 JB |
1776 | sta = sta_info_get(sdata, hdr.addr1); |
1777 | if (sta) | |
07346f81 | 1778 | sta_flags = get_sta_flags(sta); |
d0709a65 | 1779 | rcu_read_unlock(); |
e2ebc74d JB |
1780 | } |
1781 | ||
3434fbd3 | 1782 | /* receiver and we are QoS enabled, use a QoS type frame */ |
176be728 | 1783 | if ((sta_flags & WLAN_STA_WME) && local->hw.queues >= 4) { |
065e9605 | 1784 | fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); |
ce3edf6d JB |
1785 | hdrlen += 2; |
1786 | } | |
1787 | ||
1788 | /* | |
238814fd JB |
1789 | * Drop unicast frames to unauthorised stations unless they are |
1790 | * EAPOL frames from the local station. | |
ce3edf6d | 1791 | */ |
e32f85f7 LCC |
1792 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
1793 | unlikely(!is_multicast_ether_addr(hdr.addr1) && | |
33b64eb2 LCC |
1794 | !(sta_flags & WLAN_STA_AUTHORIZED) && |
1795 | !(ethertype == ETH_P_PAE && | |
47846c9b | 1796 | compare_ether_addr(sdata->vif.addr, |
ce3edf6d JB |
1797 | skb->data + ETH_ALEN) == 0))) { |
1798 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
ce3edf6d | 1799 | if (net_ratelimit()) |
0c68ae26 | 1800 | printk(KERN_DEBUG "%s: dropped frame to %pM" |
ce3edf6d | 1801 | " (unauthorized port)\n", dev->name, |
0c68ae26 | 1802 | hdr.addr1); |
ce3edf6d JB |
1803 | #endif |
1804 | ||
1805 | I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); | |
1806 | ||
ec634fe3 | 1807 | ret = NETDEV_TX_OK; |
ce3edf6d JB |
1808 | goto fail; |
1809 | } | |
1810 | ||
065e9605 | 1811 | hdr.frame_control = fc; |
e2ebc74d JB |
1812 | hdr.duration_id = 0; |
1813 | hdr.seq_ctrl = 0; | |
1814 | ||
1815 | skip_header_bytes = ETH_HLEN; | |
1816 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
1817 | encaps_data = bridge_tunnel_header; | |
1818 | encaps_len = sizeof(bridge_tunnel_header); | |
1819 | skip_header_bytes -= 2; | |
1820 | } else if (ethertype >= 0x600) { | |
1821 | encaps_data = rfc1042_header; | |
1822 | encaps_len = sizeof(rfc1042_header); | |
1823 | skip_header_bytes -= 2; | |
1824 | } else { | |
1825 | encaps_data = NULL; | |
1826 | encaps_len = 0; | |
1827 | } | |
1828 | ||
1829 | skb_pull(skb, skip_header_bytes); | |
1830 | nh_pos -= skip_header_bytes; | |
1831 | h_pos -= skip_header_bytes; | |
1832 | ||
23c0752a | 1833 | head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb); |
e2ebc74d | 1834 | |
23c0752a JB |
1835 | /* |
1836 | * So we need to modify the skb header and hence need a copy of | |
1837 | * that. The head_need variable above doesn't, so far, include | |
1838 | * the needed header space that we don't need right away. If we | |
1839 | * can, then we don't reallocate right now but only after the | |
1840 | * frame arrives at the master device (if it does...) | |
1841 | * | |
1842 | * If we cannot, however, then we will reallocate to include all | |
1843 | * the ever needed space. Also, if we need to reallocate it anyway, | |
1844 | * make it big enough for everything we may ever need. | |
1845 | */ | |
e2ebc74d | 1846 | |
3a5be7d4 | 1847 | if (head_need > 0 || skb_cloned(skb)) { |
23c0752a JB |
1848 | head_need += IEEE80211_ENCRYPT_HEADROOM; |
1849 | head_need += local->tx_headroom; | |
1850 | head_need = max_t(int, 0, head_need); | |
1851 | if (ieee80211_skb_resize(local, skb, head_need, true)) | |
e2ebc74d | 1852 | goto fail; |
e2ebc74d JB |
1853 | } |
1854 | ||
1855 | if (encaps_data) { | |
1856 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
1857 | nh_pos += encaps_len; | |
1858 | h_pos += encaps_len; | |
1859 | } | |
c29b9b9b | 1860 | |
33b64eb2 LCC |
1861 | if (meshhdrlen > 0) { |
1862 | memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen); | |
1863 | nh_pos += meshhdrlen; | |
1864 | h_pos += meshhdrlen; | |
1865 | } | |
1866 | ||
065e9605 | 1867 | if (ieee80211_is_data_qos(fc)) { |
c29b9b9b JB |
1868 | __le16 *qos_control; |
1869 | ||
1870 | qos_control = (__le16*) skb_push(skb, 2); | |
1871 | memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2); | |
1872 | /* | |
1873 | * Maybe we could actually set some fields here, for now just | |
1874 | * initialise to zero to indicate no special operation. | |
1875 | */ | |
1876 | *qos_control = 0; | |
1877 | } else | |
1878 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
1879 | ||
e2ebc74d JB |
1880 | nh_pos += hdrlen; |
1881 | h_pos += hdrlen; | |
1882 | ||
68aae116 SH |
1883 | dev->stats.tx_packets++; |
1884 | dev->stats.tx_bytes += skb->len; | |
e2ebc74d JB |
1885 | |
1886 | /* Update skb pointers to various headers since this modified frame | |
1887 | * is going to go through Linux networking code that may potentially | |
1888 | * need things like pointer to IP header. */ | |
1889 | skb_set_mac_header(skb, 0); | |
1890 | skb_set_network_header(skb, nh_pos); | |
1891 | skb_set_transport_header(skb, h_pos); | |
1892 | ||
3b8d81e0 JB |
1893 | memset(info, 0, sizeof(*info)); |
1894 | ||
e2ebc74d | 1895 | dev->trans_start = jiffies; |
3b8d81e0 | 1896 | ieee80211_xmit(sdata, skb); |
e2ebc74d | 1897 | |
ec634fe3 | 1898 | return NETDEV_TX_OK; |
e2ebc74d JB |
1899 | |
1900 | fail: | |
ec634fe3 | 1901 | if (ret == NETDEV_TX_OK) |
e2ebc74d JB |
1902 | dev_kfree_skb(skb); |
1903 | ||
1904 | return ret; | |
1905 | } | |
1906 | ||
e2ebc74d | 1907 | |
e2530083 JB |
1908 | /* |
1909 | * ieee80211_clear_tx_pending may not be called in a context where | |
1910 | * it is possible that it packets could come in again. | |
1911 | */ | |
e2ebc74d JB |
1912 | void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
1913 | { | |
2de8e0d9 | 1914 | int i; |
e2ebc74d | 1915 | |
2a577d98 JB |
1916 | for (i = 0; i < local->hw.queues; i++) |
1917 | skb_queue_purge(&local->pending[i]); | |
e2ebc74d JB |
1918 | } |
1919 | ||
cd8ffc80 JB |
1920 | static bool ieee80211_tx_pending_skb(struct ieee80211_local *local, |
1921 | struct sk_buff *skb) | |
1922 | { | |
1923 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1924 | struct ieee80211_sub_if_data *sdata; | |
1925 | struct sta_info *sta; | |
1926 | struct ieee80211_hdr *hdr; | |
cd8ffc80 JB |
1927 | int ret; |
1928 | bool result = true; | |
1929 | ||
5061b0c2 | 1930 | sdata = vif_to_sdata(info->control.vif); |
cd8ffc80 JB |
1931 | |
1932 | if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) { | |
5061b0c2 | 1933 | ieee80211_tx(sdata, skb, true); |
cd8ffc80 JB |
1934 | } else { |
1935 | hdr = (struct ieee80211_hdr *)skb->data; | |
abe60632 | 1936 | sta = sta_info_get(sdata, hdr->addr1); |
cd8ffc80 | 1937 | |
3b8d81e0 | 1938 | ret = __ieee80211_tx(local, &skb, sta, true); |
cd8ffc80 JB |
1939 | if (ret != IEEE80211_TX_OK) |
1940 | result = false; | |
1941 | } | |
1942 | ||
cd8ffc80 JB |
1943 | return result; |
1944 | } | |
1945 | ||
e2530083 | 1946 | /* |
3b8d81e0 | 1947 | * Transmit all pending packets. Called from tasklet. |
e2530083 | 1948 | */ |
e2ebc74d JB |
1949 | void ieee80211_tx_pending(unsigned long data) |
1950 | { | |
1951 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
2a577d98 | 1952 | unsigned long flags; |
cd8ffc80 | 1953 | int i; |
3b8d81e0 | 1954 | bool txok; |
e2ebc74d | 1955 | |
f0e72851 | 1956 | rcu_read_lock(); |
e2530083 | 1957 | |
3b8d81e0 | 1958 | spin_lock_irqsave(&local->queue_stop_reason_lock, flags); |
2a577d98 JB |
1959 | for (i = 0; i < local->hw.queues; i++) { |
1960 | /* | |
1961 | * If queue is stopped by something other than due to pending | |
1962 | * frames, or we have no pending frames, proceed to next queue. | |
1963 | */ | |
3b8d81e0 | 1964 | if (local->queue_stop_reasons[i] || |
2a577d98 | 1965 | skb_queue_empty(&local->pending[i])) |
e2ebc74d | 1966 | continue; |
e2530083 | 1967 | |
2a577d98 | 1968 | while (!skb_queue_empty(&local->pending[i])) { |
3b8d81e0 | 1969 | struct sk_buff *skb = __skb_dequeue(&local->pending[i]); |
5061b0c2 JB |
1970 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1971 | struct ieee80211_sub_if_data *sdata; | |
1972 | ||
a7bc376c JB |
1973 | if (WARN_ON(!info->control.vif)) { |
1974 | kfree_skb(skb); | |
1975 | continue; | |
1976 | } | |
1977 | ||
5061b0c2 | 1978 | sdata = vif_to_sdata(info->control.vif); |
3b8d81e0 JB |
1979 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, |
1980 | flags); | |
1981 | ||
1982 | txok = ieee80211_tx_pending_skb(local, skb); | |
1983 | if (!txok) | |
1984 | __skb_queue_head(&local->pending[i], skb); | |
1985 | spin_lock_irqsave(&local->queue_stop_reason_lock, | |
1986 | flags); | |
1987 | if (!txok) | |
2a577d98 | 1988 | break; |
e2ebc74d JB |
1989 | } |
1990 | } | |
3b8d81e0 | 1991 | spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); |
2a577d98 | 1992 | |
f0e72851 | 1993 | rcu_read_unlock(); |
e2ebc74d JB |
1994 | } |
1995 | ||
1996 | /* functions for drivers to get certain frames */ | |
1997 | ||
8e7be8da | 1998 | static void ieee80211_beacon_add_tim(struct ieee80211_if_ap *bss, |
5dfdaf58 JB |
1999 | struct sk_buff *skb, |
2000 | struct beacon_data *beacon) | |
e2ebc74d JB |
2001 | { |
2002 | u8 *pos, *tim; | |
2003 | int aid0 = 0; | |
2004 | int i, have_bits = 0, n1, n2; | |
2005 | ||
2006 | /* Generate bitmap for TIM only if there are any STAs in power save | |
2007 | * mode. */ | |
e2ebc74d JB |
2008 | if (atomic_read(&bss->num_sta_ps) > 0) |
2009 | /* in the hope that this is faster than | |
2010 | * checking byte-for-byte */ | |
2011 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
2012 | IEEE80211_MAX_AID+1); | |
2013 | ||
2014 | if (bss->dtim_count == 0) | |
5dfdaf58 | 2015 | bss->dtim_count = beacon->dtim_period - 1; |
e2ebc74d JB |
2016 | else |
2017 | bss->dtim_count--; | |
2018 | ||
2019 | tim = pos = (u8 *) skb_put(skb, 6); | |
2020 | *pos++ = WLAN_EID_TIM; | |
2021 | *pos++ = 4; | |
2022 | *pos++ = bss->dtim_count; | |
5dfdaf58 | 2023 | *pos++ = beacon->dtim_period; |
e2ebc74d JB |
2024 | |
2025 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2026 | aid0 = 1; | |
2027 | ||
2028 | if (have_bits) { | |
2029 | /* Find largest even number N1 so that bits numbered 1 through | |
2030 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2031 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2032 | n1 = 0; | |
2033 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2034 | if (bss->tim[i]) { | |
2035 | n1 = i & 0xfe; | |
2036 | break; | |
2037 | } | |
2038 | } | |
2039 | n2 = n1; | |
2040 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2041 | if (bss->tim[i]) { | |
2042 | n2 = i; | |
2043 | break; | |
2044 | } | |
2045 | } | |
2046 | ||
2047 | /* Bitmap control */ | |
2048 | *pos++ = n1 | aid0; | |
2049 | /* Part Virt Bitmap */ | |
2050 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
2051 | ||
2052 | tim[1] = n2 - n1 + 4; | |
2053 | skb_put(skb, n2 - n1); | |
2054 | } else { | |
2055 | *pos++ = aid0; /* Bitmap control */ | |
2056 | *pos++ = 0; /* Part Virt Bitmap */ | |
2057 | } | |
e2ebc74d JB |
2058 | } |
2059 | ||
eddcbb94 JB |
2060 | struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, |
2061 | struct ieee80211_vif *vif, | |
2062 | u16 *tim_offset, u16 *tim_length) | |
e2ebc74d JB |
2063 | { |
2064 | struct ieee80211_local *local = hw_to_local(hw); | |
9d139c81 | 2065 | struct sk_buff *skb = NULL; |
e039fa4a | 2066 | struct ieee80211_tx_info *info; |
e2ebc74d JB |
2067 | struct ieee80211_sub_if_data *sdata = NULL; |
2068 | struct ieee80211_if_ap *ap = NULL; | |
5dfdaf58 | 2069 | struct beacon_data *beacon; |
8318d78a | 2070 | struct ieee80211_supported_band *sband; |
2e92e6f2 | 2071 | enum ieee80211_band band = local->hw.conf.channel->band; |
e00cfce0 | 2072 | struct ieee80211_tx_rate_control txrc; |
8318d78a | 2073 | |
2e92e6f2 | 2074 | sband = local->hw.wiphy->bands[band]; |
5dfdaf58 JB |
2075 | |
2076 | rcu_read_lock(); | |
e2ebc74d | 2077 | |
32bfd35d | 2078 | sdata = vif_to_sdata(vif); |
e2ebc74d | 2079 | |
eddcbb94 JB |
2080 | if (tim_offset) |
2081 | *tim_offset = 0; | |
2082 | if (tim_length) | |
2083 | *tim_length = 0; | |
2084 | ||
05c914fe | 2085 | if (sdata->vif.type == NL80211_IFTYPE_AP) { |
33b64eb2 LCC |
2086 | ap = &sdata->u.ap; |
2087 | beacon = rcu_dereference(ap->beacon); | |
902acc78 JB |
2088 | if (ap && beacon) { |
2089 | /* | |
2090 | * headroom, head length, | |
2091 | * tail length and maximum TIM length | |
2092 | */ | |
2093 | skb = dev_alloc_skb(local->tx_headroom + | |
2094 | beacon->head_len + | |
2095 | beacon->tail_len + 256); | |
2096 | if (!skb) | |
2097 | goto out; | |
33b64eb2 | 2098 | |
902acc78 JB |
2099 | skb_reserve(skb, local->tx_headroom); |
2100 | memcpy(skb_put(skb, beacon->head_len), beacon->head, | |
2101 | beacon->head_len); | |
33b64eb2 | 2102 | |
d0709a65 JB |
2103 | /* |
2104 | * Not very nice, but we want to allow the driver to call | |
2105 | * ieee80211_beacon_get() as a response to the set_tim() | |
2106 | * callback. That, however, is already invoked under the | |
2107 | * sta_lock to guarantee consistent and race-free update | |
2108 | * of the tim bitmap in mac80211 and the driver. | |
2109 | */ | |
2110 | if (local->tim_in_locked_section) { | |
8e7be8da | 2111 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2112 | } else { |
2113 | unsigned long flags; | |
2114 | ||
2115 | spin_lock_irqsave(&local->sta_lock, flags); | |
8e7be8da | 2116 | ieee80211_beacon_add_tim(ap, skb, beacon); |
d0709a65 JB |
2117 | spin_unlock_irqrestore(&local->sta_lock, flags); |
2118 | } | |
33b64eb2 | 2119 | |
eddcbb94 JB |
2120 | if (tim_offset) |
2121 | *tim_offset = beacon->head_len; | |
2122 | if (tim_length) | |
2123 | *tim_length = skb->len - beacon->head_len; | |
2124 | ||
902acc78 JB |
2125 | if (beacon->tail) |
2126 | memcpy(skb_put(skb, beacon->tail_len), | |
2127 | beacon->tail, beacon->tail_len); | |
9d139c81 JB |
2128 | } else |
2129 | goto out; | |
05c914fe | 2130 | } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
46900298 | 2131 | struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; |
9d139c81 | 2132 | struct ieee80211_hdr *hdr; |
af8cdcd8 | 2133 | struct sk_buff *presp = rcu_dereference(ifibss->presp); |
33b64eb2 | 2134 | |
af8cdcd8 | 2135 | if (!presp) |
9d139c81 JB |
2136 | goto out; |
2137 | ||
af8cdcd8 | 2138 | skb = skb_copy(presp, GFP_ATOMIC); |
9d139c81 JB |
2139 | if (!skb) |
2140 | goto out; | |
2141 | ||
2142 | hdr = (struct ieee80211_hdr *) skb->data; | |
e7827a70 HH |
2143 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2144 | IEEE80211_STYPE_BEACON); | |
902acc78 | 2145 | } else if (ieee80211_vif_is_mesh(&sdata->vif)) { |
472dbc45 JB |
2146 | struct ieee80211_mgmt *mgmt; |
2147 | u8 *pos; | |
2148 | ||
902acc78 JB |
2149 | /* headroom, head length, tail length and maximum TIM length */ |
2150 | skb = dev_alloc_skb(local->tx_headroom + 400); | |
2151 | if (!skb) | |
2152 | goto out; | |
2153 | ||
2154 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2155 | mgmt = (struct ieee80211_mgmt *) | |
2156 | skb_put(skb, 24 + sizeof(mgmt->u.beacon)); | |
2157 | memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon)); | |
065e9605 HH |
2158 | mgmt->frame_control = |
2159 | cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); | |
902acc78 | 2160 | memset(mgmt->da, 0xff, ETH_ALEN); |
47846c9b JB |
2161 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
2162 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); | |
902acc78 | 2163 | mgmt->u.beacon.beacon_int = |
57c4d7b4 | 2164 | cpu_to_le16(sdata->vif.bss_conf.beacon_int); |
902acc78 JB |
2165 | mgmt->u.beacon.capab_info = 0x0; /* 0x0 for MPs */ |
2166 | ||
2167 | pos = skb_put(skb, 2); | |
2168 | *pos++ = WLAN_EID_SSID; | |
2169 | *pos++ = 0x0; | |
2170 | ||
f698d856 | 2171 | mesh_mgmt_ies_add(skb, sdata); |
9d139c81 JB |
2172 | } else { |
2173 | WARN_ON(1); | |
5dfdaf58 | 2174 | goto out; |
e2ebc74d JB |
2175 | } |
2176 | ||
e039fa4a JB |
2177 | info = IEEE80211_SKB_CB(skb); |
2178 | ||
3b8d81e0 | 2179 | info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; |
e00cfce0 | 2180 | info->flags |= IEEE80211_TX_CTL_NO_ACK; |
e039fa4a | 2181 | info->band = band; |
e00cfce0 JM |
2182 | |
2183 | memset(&txrc, 0, sizeof(txrc)); | |
2184 | txrc.hw = hw; | |
2185 | txrc.sband = sband; | |
2186 | txrc.bss_conf = &sdata->vif.bss_conf; | |
2187 | txrc.skb = skb; | |
2188 | txrc.reported_rate.idx = -1; | |
37eb0b16 JM |
2189 | txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; |
2190 | if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) | |
2191 | txrc.max_rate_idx = -1; | |
2192 | else | |
2193 | txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; | |
e00cfce0 JM |
2194 | txrc.ap = true; |
2195 | rate_control_get_rate(sdata, NULL, &txrc); | |
e039fa4a JB |
2196 | |
2197 | info->control.vif = vif; | |
f591fa5d | 2198 | |
f591fa5d JB |
2199 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
2200 | info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ; | |
e6a9854b | 2201 | out: |
5dfdaf58 | 2202 | rcu_read_unlock(); |
e2ebc74d JB |
2203 | return skb; |
2204 | } | |
eddcbb94 | 2205 | EXPORT_SYMBOL(ieee80211_beacon_get_tim); |
e2ebc74d | 2206 | |
7044cc56 KV |
2207 | struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, |
2208 | struct ieee80211_vif *vif) | |
2209 | { | |
2210 | struct ieee80211_sub_if_data *sdata; | |
2211 | struct ieee80211_if_managed *ifmgd; | |
2212 | struct ieee80211_pspoll *pspoll; | |
2213 | struct ieee80211_local *local; | |
2214 | struct sk_buff *skb; | |
2215 | ||
2216 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2217 | return NULL; | |
2218 | ||
2219 | sdata = vif_to_sdata(vif); | |
2220 | ifmgd = &sdata->u.mgd; | |
2221 | local = sdata->local; | |
2222 | ||
2223 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll)); | |
2224 | if (!skb) { | |
2225 | printk(KERN_DEBUG "%s: failed to allocate buffer for " | |
2226 | "pspoll template\n", sdata->name); | |
2227 | return NULL; | |
2228 | } | |
2229 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2230 | ||
2231 | pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll)); | |
2232 | memset(pspoll, 0, sizeof(*pspoll)); | |
2233 | pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL | | |
2234 | IEEE80211_STYPE_PSPOLL); | |
2235 | pspoll->aid = cpu_to_le16(ifmgd->aid); | |
2236 | ||
2237 | /* aid in PS-Poll has its two MSBs each set to 1 */ | |
2238 | pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14); | |
2239 | ||
2240 | memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN); | |
2241 | memcpy(pspoll->ta, vif->addr, ETH_ALEN); | |
2242 | ||
2243 | return skb; | |
2244 | } | |
2245 | EXPORT_SYMBOL(ieee80211_pspoll_get); | |
2246 | ||
2247 | struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, | |
2248 | struct ieee80211_vif *vif) | |
2249 | { | |
2250 | struct ieee80211_hdr_3addr *nullfunc; | |
2251 | struct ieee80211_sub_if_data *sdata; | |
2252 | struct ieee80211_if_managed *ifmgd; | |
2253 | struct ieee80211_local *local; | |
2254 | struct sk_buff *skb; | |
2255 | ||
2256 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
2257 | return NULL; | |
2258 | ||
2259 | sdata = vif_to_sdata(vif); | |
2260 | ifmgd = &sdata->u.mgd; | |
2261 | local = sdata->local; | |
2262 | ||
2263 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc)); | |
2264 | if (!skb) { | |
2265 | printk(KERN_DEBUG "%s: failed to allocate buffer for nullfunc " | |
2266 | "template\n", sdata->name); | |
2267 | return NULL; | |
2268 | } | |
2269 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2270 | ||
2271 | nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb, | |
2272 | sizeof(*nullfunc)); | |
2273 | memset(nullfunc, 0, sizeof(*nullfunc)); | |
2274 | nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA | | |
2275 | IEEE80211_STYPE_NULLFUNC | | |
2276 | IEEE80211_FCTL_TODS); | |
2277 | memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN); | |
2278 | memcpy(nullfunc->addr2, vif->addr, ETH_ALEN); | |
2279 | memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN); | |
2280 | ||
2281 | return skb; | |
2282 | } | |
2283 | EXPORT_SYMBOL(ieee80211_nullfunc_get); | |
2284 | ||
05e54ea6 KV |
2285 | struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, |
2286 | struct ieee80211_vif *vif, | |
2287 | const u8 *ssid, size_t ssid_len, | |
2288 | const u8 *ie, size_t ie_len) | |
2289 | { | |
2290 | struct ieee80211_sub_if_data *sdata; | |
2291 | struct ieee80211_local *local; | |
2292 | struct ieee80211_hdr_3addr *hdr; | |
2293 | struct sk_buff *skb; | |
2294 | size_t ie_ssid_len; | |
2295 | u8 *pos; | |
2296 | ||
2297 | sdata = vif_to_sdata(vif); | |
2298 | local = sdata->local; | |
2299 | ie_ssid_len = 2 + ssid_len; | |
2300 | ||
2301 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) + | |
2302 | ie_ssid_len + ie_len); | |
2303 | if (!skb) { | |
2304 | printk(KERN_DEBUG "%s: failed to allocate buffer for probe " | |
2305 | "request template\n", sdata->name); | |
2306 | return NULL; | |
2307 | } | |
2308 | ||
2309 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2310 | ||
2311 | hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr)); | |
2312 | memset(hdr, 0, sizeof(*hdr)); | |
2313 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
2314 | IEEE80211_STYPE_PROBE_REQ); | |
2315 | memset(hdr->addr1, 0xff, ETH_ALEN); | |
2316 | memcpy(hdr->addr2, vif->addr, ETH_ALEN); | |
2317 | memset(hdr->addr3, 0xff, ETH_ALEN); | |
2318 | ||
2319 | pos = skb_put(skb, ie_ssid_len); | |
2320 | *pos++ = WLAN_EID_SSID; | |
2321 | *pos++ = ssid_len; | |
2322 | if (ssid) | |
2323 | memcpy(pos, ssid, ssid_len); | |
2324 | pos += ssid_len; | |
2325 | ||
2326 | if (ie) { | |
2327 | pos = skb_put(skb, ie_len); | |
2328 | memcpy(pos, ie, ie_len); | |
2329 | } | |
2330 | ||
2331 | return skb; | |
2332 | } | |
2333 | EXPORT_SYMBOL(ieee80211_probereq_get); | |
2334 | ||
32bfd35d | 2335 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2336 | const void *frame, size_t frame_len, |
e039fa4a | 2337 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2338 | struct ieee80211_rts *rts) |
2339 | { | |
2340 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2341 | |
065e9605 HH |
2342 | rts->frame_control = |
2343 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); | |
32bfd35d JB |
2344 | rts->duration = ieee80211_rts_duration(hw, vif, frame_len, |
2345 | frame_txctl); | |
e2ebc74d JB |
2346 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
2347 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2348 | } | |
2349 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2350 | ||
32bfd35d | 2351 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
e2ebc74d | 2352 | const void *frame, size_t frame_len, |
e039fa4a | 2353 | const struct ieee80211_tx_info *frame_txctl, |
e2ebc74d JB |
2354 | struct ieee80211_cts *cts) |
2355 | { | |
2356 | const struct ieee80211_hdr *hdr = frame; | |
e2ebc74d | 2357 | |
065e9605 HH |
2358 | cts->frame_control = |
2359 | cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); | |
32bfd35d JB |
2360 | cts->duration = ieee80211_ctstoself_duration(hw, vif, |
2361 | frame_len, frame_txctl); | |
e2ebc74d JB |
2362 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
2363 | } | |
2364 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2365 | ||
2366 | struct sk_buff * | |
32bfd35d | 2367 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, |
e039fa4a | 2368 | struct ieee80211_vif *vif) |
e2ebc74d JB |
2369 | { |
2370 | struct ieee80211_local *local = hw_to_local(hw); | |
747cf5e9 | 2371 | struct sk_buff *skb = NULL; |
e2ebc74d | 2372 | struct sta_info *sta; |
5cf121c3 | 2373 | struct ieee80211_tx_data tx; |
e2ebc74d JB |
2374 | struct ieee80211_sub_if_data *sdata; |
2375 | struct ieee80211_if_ap *bss = NULL; | |
5dfdaf58 | 2376 | struct beacon_data *beacon; |
e039fa4a | 2377 | struct ieee80211_tx_info *info; |
e2ebc74d | 2378 | |
32bfd35d | 2379 | sdata = vif_to_sdata(vif); |
747cf5e9 | 2380 | bss = &sdata->u.ap; |
5dfdaf58 | 2381 | |
5dfdaf58 JB |
2382 | rcu_read_lock(); |
2383 | beacon = rcu_dereference(bss->beacon); | |
2384 | ||
05c914fe | 2385 | if (sdata->vif.type != NL80211_IFTYPE_AP || !beacon || !beacon->head) |
747cf5e9 | 2386 | goto out; |
5dfdaf58 | 2387 | |
e2ebc74d | 2388 | if (bss->dtim_count != 0) |
747cf5e9 | 2389 | goto out; /* send buffered bc/mc only after DTIM beacon */ |
e039fa4a | 2390 | |
e2ebc74d JB |
2391 | while (1) { |
2392 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2393 | if (!skb) | |
747cf5e9 | 2394 | goto out; |
e2ebc74d JB |
2395 | local->total_ps_buffered--; |
2396 | ||
2397 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2398 | struct ieee80211_hdr *hdr = | |
2399 | (struct ieee80211_hdr *) skb->data; | |
2400 | /* more buffered multicast/broadcast frames ==> set | |
2401 | * MoreData flag in IEEE 802.11 header to inform PS | |
2402 | * STAs */ | |
2403 | hdr->frame_control |= | |
2404 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2405 | } | |
2406 | ||
3b8d81e0 | 2407 | if (!ieee80211_tx_prepare(sdata, &tx, skb)) |
e2ebc74d JB |
2408 | break; |
2409 | dev_kfree_skb_any(skb); | |
2410 | } | |
e039fa4a JB |
2411 | |
2412 | info = IEEE80211_SKB_CB(skb); | |
2413 | ||
e2ebc74d | 2414 | sta = tx.sta; |
5cf121c3 JB |
2415 | tx.flags |= IEEE80211_TX_PS_BUFFERED; |
2416 | tx.channel = local->hw.conf.channel; | |
e039fa4a | 2417 | info->band = tx.channel->band; |
e2ebc74d | 2418 | |
97b045d6 | 2419 | if (invoke_tx_handlers(&tx)) |
e2ebc74d | 2420 | skb = NULL; |
97b045d6 | 2421 | out: |
d0709a65 | 2422 | rcu_read_unlock(); |
e2ebc74d JB |
2423 | |
2424 | return skb; | |
2425 | } | |
2426 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
3b8d81e0 | 2427 | |
62ae67be | 2428 | void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) |
3b8d81e0 | 2429 | { |
3b8d81e0 JB |
2430 | skb_set_mac_header(skb, 0); |
2431 | skb_set_network_header(skb, 0); | |
2432 | skb_set_transport_header(skb, 0); | |
2433 | ||
cf0277e7 JB |
2434 | /* send all internal mgmt frames on VO */ |
2435 | skb_set_queue_mapping(skb, 0); | |
2436 | ||
3d34deb6 JB |
2437 | /* |
2438 | * The other path calling ieee80211_xmit is from the tasklet, | |
2439 | * and while we can handle concurrent transmissions locking | |
2440 | * requirements are that we do not come into tx with bhs on. | |
2441 | */ | |
2442 | local_bh_disable(); | |
3b8d81e0 | 2443 | ieee80211_xmit(sdata, skb); |
3d34deb6 | 2444 | local_bh_enable(); |
3b8d81e0 | 2445 | } |